diff options
Diffstat (limited to 'target/linux/adm5120/files-3.18/drivers')
15 files changed, 7265 insertions, 0 deletions
diff --git a/target/linux/adm5120/files-3.18/drivers/ata/pata_rb153_cf.c b/target/linux/adm5120/files-3.18/drivers/ata/pata_rb153_cf.c new file mode 100644 index 0000000..92a4d13 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/ata/pata_rb153_cf.c @@ -0,0 +1,267 @@ +/* + * A low-level PATA driver to handle a Compact Flash connected on the + * Mikrotik's RouterBoard 153 board. + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was based on: drivers/ata/pata_ixp4xx_cf.c + * Copyright (C) 2006-07 Tower Technologies + * Author: Alessandro Zummo <a.zummo@towertech.it> + * + * Also was based on the driver for Linux 2.4.xx published by Mikrotik for + * their RouterBoard 1xx and 5xx series devices. The original Mikrotik code + * seems not to have a license. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> + +#include <linux/libata.h> +#include <scsi/scsi_host.h> + +#define DRV_NAME "pata-rb153-cf" +#define DRV_VERSION "0.5.0" +#define DRV_DESC "PATA driver for RouterBOARD 153 Compact Flash" + +#define RB153_CF_MAXPORTS 1 +#define RB153_CF_IO_DELAY 100 + +#define RB153_CF_REG_CMD 0x0800 +#define RB153_CF_REG_CTRL 0x080E +#define RB153_CF_REG_DATA 0x0C00 + +struct rb153_cf_info { + void __iomem *iobase; + unsigned int gpio_line; + int frozen; + unsigned int irq; +}; + +static inline void rb153_pata_finish_io(struct ata_port *ap) +{ + struct rb153_cf_info *info = ap->host->private_data; + + /* FIXME: Keep previous delay. If this is merely a fence then + * ata_sff_sync might be sufficient. */ + ata_sff_dma_pause(ap); + ndelay(RB153_CF_IO_DELAY); + + irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH); +} + +static void rb153_pata_exec_command(struct ata_port *ap, + const struct ata_taskfile *tf) +{ + writeb(tf->command, ap->ioaddr.command_addr); + rb153_pata_finish_io(ap); +} + +static unsigned int rb153_pata_data_xfer(struct ata_device *adev, + unsigned char *buf, + unsigned int buflen, + int write_data) +{ + void __iomem *ioaddr = adev->link->ap->ioaddr.data_addr; + unsigned int t; + + t = buflen; + if (write_data) { + for (; t > 0; t--, buf++) + writeb(*buf, ioaddr); + } else { + for (; t > 0; t--, buf++) + *buf = readb(ioaddr); + } + + rb153_pata_finish_io(adev->link->ap); + return buflen; +} + +static void rb153_pata_freeze(struct ata_port *ap) +{ + struct rb153_cf_info *info = ap->host->private_data; + + info->frozen = 1; +} + +static void rb153_pata_thaw(struct ata_port *ap) +{ + struct rb153_cf_info *info = ap->host->private_data; + + info->frozen = 0; +} + +static irqreturn_t rb153_pata_irq_handler(int irq, void *dev_instance) +{ + struct ata_host *ah = dev_instance; + struct rb153_cf_info *info = ah->private_data; + + if (gpio_get_value(info->gpio_line)) { + irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_LOW); + if (!info->frozen) + ata_sff_interrupt(irq, dev_instance); + } else { + irq_set_irq_type(info->irq, IRQ_TYPE_LEVEL_HIGH); + } + + return IRQ_HANDLED; +} + +static struct ata_port_operations rb153_pata_port_ops = { + .inherits = &ata_sff_port_ops, + .sff_exec_command = rb153_pata_exec_command, + .sff_data_xfer = rb153_pata_data_xfer, + .freeze = rb153_pata_freeze, + .thaw = rb153_pata_thaw, +}; + +static struct scsi_host_template rb153_pata_sht = { + ATA_PIO_SHT(DRV_NAME), +}; + +static void rb153_pata_setup_port(struct ata_host *ah) +{ + struct rb153_cf_info *info = ah->private_data; + struct ata_port *ap; + + ap = ah->ports[0]; + + ap->ops = &rb153_pata_port_ops; + ap->pio_mask = 0x1f; /* PIO4 */ + + ap->ioaddr.cmd_addr = info->iobase + RB153_CF_REG_CMD; + ap->ioaddr.ctl_addr = info->iobase + RB153_CF_REG_CTRL; + ap->ioaddr.altstatus_addr = info->iobase + RB153_CF_REG_CTRL; + + ata_sff_std_ports(&ap->ioaddr); + + ap->ioaddr.data_addr = info->iobase + RB153_CF_REG_DATA; +} + +static int rb153_pata_driver_probe(struct platform_device *pdev) +{ + unsigned int irq; + int gpio; + struct resource *res; + struct ata_host *ah; + struct rb153_cf_info *info; + int ret; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, "no IOMEM resource found\n"); + return -EINVAL; + } + + irq = platform_get_irq(pdev, 0); + if (irq <= 0) { + dev_err(&pdev->dev, "no IRQ resource found\n"); + return -ENOENT; + } + + gpio = irq_to_gpio(irq); + if (gpio < 0) { + dev_err(&pdev->dev, "no GPIO found for irq%d\n", irq); + return -ENOENT; + } + + ret = gpio_request(gpio, DRV_NAME); + if (ret) { + dev_err(&pdev->dev, "GPIO request failed\n"); + return ret; + } + + ah = ata_host_alloc(&pdev->dev, RB153_CF_MAXPORTS); + if (!ah) + return -ENOMEM; + + platform_set_drvdata(pdev, ah); + + info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + + ah->private_data = info; + info->gpio_line = gpio; + info->irq = irq; + + info->iobase = devm_ioremap_nocache(&pdev->dev, res->start, + res->end - res->start + 1); + if (!info->iobase) + return -ENOMEM; + + ret = gpio_direction_input(gpio); + if (ret) { + dev_err(&pdev->dev, "unable to set GPIO direction, err=%d\n", + ret); + goto err_free_gpio; + } + + rb153_pata_setup_port(ah); + + ret = ata_host_activate(ah, irq, rb153_pata_irq_handler, + IRQF_TRIGGER_LOW, &rb153_pata_sht); + if (ret) + goto err_free_gpio; + + return 0; + +err_free_gpio: + gpio_free(gpio); + + return ret; +} + +static int rb153_pata_driver_remove(struct platform_device *pdev) +{ + struct ata_host *ah = platform_get_drvdata(pdev); + struct rb153_cf_info *info = ah->private_data; + + ata_host_detach(ah); + gpio_free(info->gpio_line); + + return 0; +} + +static struct platform_driver rb153_pata_platform_driver = { + .probe = rb153_pata_driver_probe, + .remove = rb153_pata_driver_remove, + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, +}; + +/* ------------------------------------------------------------------------ */ + +#define DRV_INFO DRV_DESC " version " DRV_VERSION + +static int __init rb153_pata_module_init(void) +{ + printk(KERN_INFO DRV_INFO "\n"); + + return platform_driver_register(&rb153_pata_platform_driver); +} + +static void __exit rb153_pata_module_exit(void) +{ + platform_driver_unregister(&rb153_pata_platform_driver); +} + +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_VERSION(DRV_VERSION); +MODULE_LICENSE("GPL v2"); + +module_init(rb153_pata_module_init); +module_exit(rb153_pata_module_exit); diff --git a/target/linux/adm5120/files-3.18/drivers/leds/ledtrig-adm5120-switch.c b/target/linux/adm5120/files-3.18/drivers/leds/ledtrig-adm5120-switch.c new file mode 100644 index 0000000..23a54a0 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/leds/ledtrig-adm5120-switch.c @@ -0,0 +1,149 @@ +/* + * LED ADM5120 Switch Port State Trigger + * + * Copyright (C) 2007 Bernhard Held <bernhard at bernhardheld.de> + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was based on: drivers/leds/ledtrig-timer.c + * Copyright 2005-2006 Openedhand Ltd. + * Author: Richard Purdie + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/device.h> + +#include <linux/gpio.h> + +#include "leds.h" + +#define DRV_NAME "port_state" +#define DRV_DESC "LED ADM5120 Switch Port State Trigger" + +struct port_state { + char *name; + unsigned int value; +}; + +#define PORT_STATE(n, v) {.name = (n), .value = (v)} + +static struct port_state port_states[] = { + PORT_STATE("off", LED_OFF), + PORT_STATE("on", LED_FULL), + PORT_STATE("flash", ADM5120_GPIO_FLASH), + PORT_STATE("link", ADM5120_GPIO_LINK), + PORT_STATE("speed", ADM5120_GPIO_SPEED), + PORT_STATE("duplex", ADM5120_GPIO_DUPLEX), + PORT_STATE("act", ADM5120_GPIO_ACT), + PORT_STATE("coll", ADM5120_GPIO_COLL), + PORT_STATE("link_act", ADM5120_GPIO_LINK_ACT), + PORT_STATE("duplex_coll", ADM5120_GPIO_DUPLEX_COLL), + PORT_STATE("10M_act", ADM5120_GPIO_10M_ACT), + PORT_STATE("100M_act", ADM5120_GPIO_100M_ACT), +}; + +static ssize_t led_port_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + struct port_state *state = led_cdev->trigger_data; + int len = 0; + int i; + + *buf = '\0'; + for (i = 0; i < ARRAY_SIZE(port_states); i++) { + if (&port_states[i] == state) + len += sprintf(buf+len, "[%s] ", port_states[i].name); + else + len += sprintf(buf+len, "%s ", port_states[i].name); + } + len += sprintf(buf+len, "\n"); + + return len; +} + +static ssize_t led_port_state_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t size) +{ + struct led_classdev *led_cdev = dev_get_drvdata(dev); + size_t len; + int i; + + for (i = 0; i < ARRAY_SIZE(port_states); i++) { + len = strlen(port_states[i].name); + if (strncmp(port_states[i].name, buf, len) != 0) + continue; + + if (buf[len] != '\0' && buf[len] != '\n') + continue; + + led_cdev->trigger_data = &port_states[i]; + led_set_brightness(led_cdev, port_states[i].value); + return size; + } + + return -EINVAL; +} + +static DEVICE_ATTR(port_state, 0644, led_port_state_show, + led_port_state_store); + +static void adm5120_switch_trig_activate(struct led_classdev *led_cdev) +{ + struct port_state *state = port_states; + int rc; + + led_cdev->trigger_data = state; + + rc = device_create_file(led_cdev->dev, &dev_attr_port_state); + if (rc) + goto err; + + led_set_brightness(led_cdev, state->value); + + return; +err: + led_cdev->trigger_data = NULL; +} + +static void adm5120_switch_trig_deactivate(struct led_classdev *led_cdev) +{ + struct port_state *state = led_cdev->trigger_data; + + if (!state) + return; + + device_remove_file(led_cdev->dev, &dev_attr_port_state); + +} + +static struct led_trigger adm5120_switch_led_trigger = { + .name = DRV_NAME, + .activate = adm5120_switch_trig_activate, + .deactivate = adm5120_switch_trig_deactivate, +}; + +static int __init adm5120_switch_trig_init(void) +{ + led_trigger_register(&adm5120_switch_led_trigger); + return 0; +} + +static void __exit adm5120_switch_trig_exit(void) +{ + led_trigger_unregister(&adm5120_switch_led_trigger); +} + +module_init(adm5120_switch_trig_init); +module_exit(adm5120_switch_trig_exit); + +MODULE_AUTHOR("Bernhard Held <bernhard at bernhardheld.de>, " + "Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/adm5120/files-3.18/drivers/mtd/maps/adm5120-flash.c b/target/linux/adm5120/files-3.18/drivers/mtd/maps/adm5120-flash.c new file mode 100644 index 0000000..f6a86f4 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/mtd/maps/adm5120-flash.c @@ -0,0 +1,482 @@ +/* + * Platform driver for NOR flash devices on ADM5120 based boards + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/mtd/map/physmap.c + * Copyright (C) 2003 MontaVista Software Inc. + * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/device.h> +#include <linux/platform_device.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/map.h> +#include <linux/mtd/partitions.h> + +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_switch.h> +#include <asm/mach-adm5120/adm5120_mpmc.h> +#include <asm/mach-adm5120/adm5120_platform.h> + +#define DRV_NAME "adm5120-flash" +#define DRV_DESC "ADM5120 flash MAP driver" +#define MAX_PARSED_PARTS 8 + +#ifdef ADM5120_FLASH_DEBUG +#define MAP_DBG(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a) +#else +#define MAP_DBG(m, f, a...) do {} while (0) +#endif +#define MAP_ERR(m, f, a...) printk(KERN_ERR "%s: " f, (m->name) , ## a) +#define MAP_INFO(m, f, a...) printk(KERN_INFO "%s: " f, (m->name) , ## a) + +struct adm5120_map_info { + struct map_info map; + void (*switch_bank)(unsigned); + unsigned long window_size; +}; + +struct adm5120_flash_info { + struct mtd_info *mtd; + struct resource *res; + struct platform_device *dev; + struct adm5120_map_info amap; +}; + +struct flash_desc { + u32 phys; + u32 srs_shift; +}; + +/* + * Globals + */ +static DEFINE_SPINLOCK(adm5120_flash_spin); +#define FLASH_LOCK() spin_lock(&adm5120_flash_spin) +#define FLASH_UNLOCK() spin_unlock(&adm5120_flash_spin) + +static u32 flash_bankwidths[4] = { 1, 2, 4, 0 }; + +static u32 flash_sizes[8] = { + 0, 512*1024, 1024*1024, 2*1024*1024, + 4*1024*1024, 0, 0, 0 +}; + +static struct flash_desc flash_descs[2] = { + { + .phys = ADM5120_SRAM0_BASE, + .srs_shift = MEMCTRL_SRS0_SHIFT, + }, { + .phys = ADM5120_SRAM1_BASE, + .srs_shift = MEMCTRL_SRS1_SHIFT, + } +}; + +static const char const *probe_types[] = { + "cfi_probe", + "jedec_probe", + "map_rom", + NULL +}; + +static const char const *parse_types[] = { + "cmdlinepart", +#ifdef CONFIG_MTD_REDBOOT_PARTS + "RedBoot", +#endif +#ifdef CONFIG_MTD_MYLOADER_PARTS + "MyLoader", +#endif + NULL, +}; + +#define BANK_SIZE (2<<20) +#define BANK_SIZE_MAX (4<<20) +#define BANK_OFFS_MASK (BANK_SIZE-1) +#define BANK_START_MASK (~BANK_OFFS_MASK) + +static inline struct adm5120_map_info *map_to_amap(struct map_info *map) +{ + return (struct adm5120_map_info *)map; +} + +static void adm5120_flash_switchbank(struct map_info *map, + unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + unsigned bank; + + if (amap->switch_bank == NULL) + return; + + bank = (ofs & BANK_START_MASK) >> 21; + if (bank > 1) + BUG(); + + MAP_DBG(map, "switching to bank %u, ofs=%lX\n", bank, ofs); + amap->switch_bank(bank); +} + +static map_word adm5120_flash_read(struct map_info *map, unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + map_word ret; + + MAP_DBG(map, "reading from ofs %lX\n", ofs); + + if (ofs >= amap->window_size) + return map_word_ff(map); + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + ret = inline_map_read(map, (ofs & (amap->window_size-1))); + FLASH_UNLOCK(); + + return ret; +} + +static void adm5120_flash_write(struct map_info *map, const map_word datum, + unsigned long ofs) +{ + struct adm5120_map_info *amap = map_to_amap(map); + + MAP_DBG(map, "writing to ofs %lX\n", ofs); + + if (ofs > amap->window_size) + return; + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + inline_map_write(map, datum, (ofs & (amap->window_size-1))); + FLASH_UNLOCK(); +} + +static void adm5120_flash_copy_from(struct map_info *map, void *to, + unsigned long from, ssize_t len) +{ + struct adm5120_map_info *amap = map_to_amap(map); + char *p; + ssize_t t; + + MAP_DBG(map, "copy_from, to=%lX, from=%lX, len=%lX\n", + (unsigned long)to, from, (unsigned long)len); + + if (from > amap->window_size) + return; + + p = (char *)to; + while (len > 0) { + t = len; + if ((from < BANK_SIZE) && ((from+len) > BANK_SIZE)) + t = BANK_SIZE-from; + + FLASH_LOCK(); + MAP_DBG(map, "copying %lu byte(s) from %lX to %lX\n", + (unsigned long)t, (from & (amap->window_size-1)), + (unsigned long)p); + adm5120_flash_switchbank(map, from); + inline_map_copy_from(map, p, (from & (amap->window_size-1)), t); + FLASH_UNLOCK(); + p += t; + from += t; + len -= t; + } +} + +static int adm5120_flash_initres(struct adm5120_flash_info *info) +{ + struct map_info *map = &info->amap.map; + int err = 0; + + info->res = request_mem_region(map->phys, info->amap.window_size, + map->name); + if (info->res == NULL) { + MAP_ERR(map, "could not reserve memory region\n"); + err = -ENOMEM; + goto out; + } + + map->virt = ioremap_nocache(map->phys, info->amap.window_size); + if (map->virt == NULL) { + MAP_ERR(map, "failed to ioremap flash region\n"); + err = -ENOMEM; + goto out; + } + +out: + return err; +} + +static int adm5120_flash_initinfo(struct adm5120_flash_info *info, + struct platform_device *dev) +{ + struct map_info *map = &info->amap.map; + struct adm5120_flash_platform_data *pdata = dev->dev.platform_data; + struct flash_desc *fdesc; + u32 t = 0; + + map->name = dev_name(&dev->dev); + + if (dev->id > 1) { + MAP_ERR(map, "invalid flash id\n"); + goto err_out; + } + + fdesc = &flash_descs[dev->id]; + + if (pdata) + info->amap.window_size = pdata->window_size; + + if (info->amap.window_size == 0) { + /* get memory window size */ + t = SW_READ_REG(SWITCH_REG_MEMCTRL) >> fdesc->srs_shift; + t &= MEMCTRL_SRS_MASK; + info->amap.window_size = flash_sizes[t]; + } + + if (info->amap.window_size == 0) { + MAP_ERR(map, "unable to determine window size\n"); + goto err_out; + } + + /* get flash bus width */ + switch (dev->id) { + case 0: + t = MPMC_READ_REG(SC1) & SC_MW_MASK; + break; + case 1: + t = MPMC_READ_REG(SC0) & SC_MW_MASK; + break; + } + map->bankwidth = flash_bankwidths[t]; + if (map->bankwidth == 0) { + MAP_ERR(map, "invalid bus width detected\n"); + goto err_out; + } + + map->phys = fdesc->phys; + map->size = BANK_SIZE_MAX; + + simple_map_init(map); + map->read = adm5120_flash_read; + map->write = adm5120_flash_write; + map->copy_from = adm5120_flash_copy_from; + + if (pdata) { + map->set_vpp = pdata->set_vpp; + info->amap.switch_bank = pdata->switch_bank; + } + + info->dev = dev; + + MAP_INFO(map, "probing at 0x%lX, size:%ldKiB, width:%d bits\n", + (unsigned long)map->phys, + (unsigned long)info->amap.window_size >> 10, + map->bankwidth*8); + + return 0; + +err_out: + return -ENODEV; +} + +static void adm5120_flash_initbanks(struct adm5120_flash_info *info) +{ + struct map_info *map = &info->amap.map; + + if (info->mtd->size <= BANK_SIZE) + /* no bank switching needed */ + return; + + if (info->amap.switch_bank) { + info->amap.window_size = info->mtd->size; + return; + } + + MAP_ERR(map, "reduce visibility from %ldKiB to %ldKiB\n", + (unsigned long)map->size >> 10, + (unsigned long)info->mtd->size >> 10); + + info->mtd->size = info->amap.window_size; +} + +static int adm5120_flash_remove(struct platform_device *dev) +{ + struct adm5120_flash_info *info; + + info = platform_get_drvdata(dev); + if (info == NULL) + return 0; + + platform_set_drvdata(dev, NULL); + + if (info->mtd != NULL) { + mtd_device_unregister(info->mtd); + map_destroy(info->mtd); + } + + if (info->amap.map.virt != NULL) + iounmap(info->amap.map.virt); + + if (info->res != NULL) { + release_resource(info->res); + kfree(info->res); + } + + return 0; +} + +static int adm5120_flash_probe(struct platform_device *dev) +{ + struct adm5120_flash_platform_data *pdata; + struct adm5120_flash_info *info; + struct map_info *map; + const char **probe_type; + int err; + + pdata = dev->dev.platform_data; + if (!pdata) { + dev_err(&dev->dev, "no platform data\n"); + return -EINVAL; + } + + info = kzalloc(sizeof(*info), GFP_KERNEL); + if (info == NULL) { + err = -ENOMEM; + goto err_out; + } + + platform_set_drvdata(dev, info); + + err = adm5120_flash_initinfo(info, dev); + if (err) + goto err_out; + + err = adm5120_flash_initres(info); + if (err) + goto err_out; + + map = &info->amap.map; + for (probe_type = probe_types; info->mtd == NULL && *probe_type != NULL; + probe_type++) + info->mtd = do_map_probe(*probe_type, map); + + if (info->mtd == NULL) { + MAP_ERR(map, "map_probe failed\n"); + err = -ENXIO; + goto err_out; + } + + adm5120_flash_initbanks(info); + + if (info->mtd->size < info->amap.window_size) { + /* readjust resources */ + iounmap(map->virt); + release_resource(info->res); + kfree(info->res); + + info->amap.window_size = info->mtd->size; + map->size = info->mtd->size; + MAP_INFO(map, "reducing map size to %ldKiB\n", + (unsigned long)map->size >> 10); + err = adm5120_flash_initres(info); + if (err) + goto err_out; + } + + MAP_INFO(map, "found at 0x%lX, size:%ldKiB, width:%d bits\n", + (unsigned long)map->phys, (unsigned long)info->mtd->size >> 10, + map->bankwidth*8); + + info->mtd->owner = THIS_MODULE; + + err = mtd_device_parse_register(info->mtd, parse_types, 0, + pdata->parts, pdata->nr_parts); + if (err) + goto err_out; + + return 0; + +err_out: + adm5120_flash_remove(dev); + return err; +} + +#ifdef CONFIG_PM +static int adm5120_flash_suspend(struct platform_device *dev, + pm_message_t state) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + int ret = 0; + + if (info) + ret = info->mtd->suspend(info->mtd); + + return ret; +} + +static int adm5120_flash_resume(struct platform_device *dev) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + + if (info) + info->mtd->resume(info->mtd); + + return 0; +} + +static void adm5120_flash_shutdown(struct platform_device *dev) +{ + struct adm5120_flash_info *info = platform_get_drvdata(dev); + + if (info && info->mtd->suspend(info->mtd) == 0) + info->mtd->resume(info->mtd); +} +#endif + +static struct platform_driver adm5120_flash_driver = { + .probe = adm5120_flash_probe, + .remove = adm5120_flash_remove, +#ifdef CONFIG_PM + .suspend = adm5120_flash_suspend, + .resume = adm5120_flash_resume, + .shutdown = adm5120_flash_shutdown, +#endif + .driver = { + .name = DRV_NAME, + }, +}; + +static int __init adm5120_flash_init(void) +{ + int err; + + err = platform_driver_register(&adm5120_flash_driver); + + return err; +} + +static void __exit adm5120_flash_exit(void) +{ + platform_driver_unregister(&adm5120_flash_driver); +} + +module_init(adm5120_flash_init); +module_exit(adm5120_flash_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION(DRV_DESC); diff --git a/target/linux/adm5120/files-3.18/drivers/mtd/trxsplit.c b/target/linux/adm5120/files-3.18/drivers/mtd/trxsplit.c new file mode 100644 index 0000000..76cbdc7 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/mtd/trxsplit.c @@ -0,0 +1,216 @@ +/* + * Copyright (C) Gabor Juhos <juhosg@openwrt.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/list.h> +#include <linux/kmod.h> +#include <linux/root_dev.h> + +#include <linux/mtd/mtd.h> +#include <linux/mtd/partitions.h> + +#include <linux/byteorder/generic.h> + +#define PFX "trxsplit: " + +#define TRX_MAGIC 0x30524448 /* "HDR0" */ +#define TRX_VERSION 1 +#define TRX_MAX_LEN 0x3A0000 +#define TRX_NO_HEADER 0x1 /* do not write TRX header */ +#define TRX_GZ_FILES 0x2 /* contains individual gzip files */ +#define TRX_MAX_OFFSET 3 +#define TRX_MIN_KERNEL_SIZE (256 * 1024) + +struct trx_header { + u32 magic; /* "HDR0" */ + u32 len; /* Length of file including header */ + u32 crc32; /* 32-bit CRC from flag_version to end of file */ + u32 flag_version; /* 0:15 flags, 16:31 version */ + u32 offsets[TRX_MAX_OFFSET]; /* Offsets of partitions */ +}; + +#define TRX_ALIGN 0x1000 + +static int trx_nr_parts; +static unsigned long trx_offset; +static struct mtd_info *trx_mtd; +static struct mtd_partition trx_parts[TRX_MAX_OFFSET]; +static struct trx_header trx_hdr; + +static int trxsplit_refresh_partitions(struct mtd_info *mtd); + +static int trxsplit_checktrx(struct mtd_info *mtd, unsigned long offset) +{ + size_t retlen; + int err; + + err = mtd_read(mtd, offset, sizeof(trx_hdr), &retlen, (void *)&trx_hdr); + if (err) { + printk(KERN_ALERT PFX "unable to read from '%s'\n", mtd->name); + goto err_out; + } + + if (retlen != sizeof(trx_hdr)) { + printk(KERN_ALERT PFX "reading failed on '%s'\n", mtd->name); + goto err_out; + } + + trx_hdr.magic = le32_to_cpu(trx_hdr.magic); + trx_hdr.len = le32_to_cpu(trx_hdr.len); + trx_hdr.crc32 = le32_to_cpu(trx_hdr.crc32); + trx_hdr.flag_version = le32_to_cpu(trx_hdr.flag_version); + trx_hdr.offsets[0] = le32_to_cpu(trx_hdr.offsets[0]); + trx_hdr.offsets[1] = le32_to_cpu(trx_hdr.offsets[1]); + trx_hdr.offsets[2] = le32_to_cpu(trx_hdr.offsets[2]); + + /* sanity checks */ + if (trx_hdr.magic != TRX_MAGIC) + goto err_out; + + if (trx_hdr.len > mtd->size - offset) + goto err_out; + + /* TODO: add crc32 checking too? */ + + return 0; + +err_out: + return -1; +} + +static void trxsplit_findtrx(struct mtd_info *mtd) +{ + unsigned long offset; + int err; + + printk(KERN_INFO PFX "searching TRX header in '%s'\n", mtd->name); + + err = 0; + for (offset = 0; offset < mtd->size; offset += TRX_ALIGN) { + err = trxsplit_checktrx(mtd, offset); + if (err == 0) + break; + } + + if (err) + return; + + printk(KERN_INFO PFX "TRX header found at 0x%lX\n", offset); + + trx_mtd = mtd; + trx_offset = offset; +} + +static void trxsplit_create_partitions(struct mtd_info *mtd) +{ + struct mtd_partition *part = trx_parts; + int err; + int i; + + for (i = 0; i < TRX_MAX_OFFSET; i++) { + part = &trx_parts[i]; + if (trx_hdr.offsets[i] == 0) + continue; + part->offset = trx_offset + trx_hdr.offsets[i]; + trx_nr_parts++; + } + + for (i = 0; i < trx_nr_parts-1; i++) + trx_parts[i].size = trx_parts[i+1].offset - trx_parts[i].offset; + + trx_parts[i].size = mtd->size - trx_parts[i].offset; + + i = 0; + part = &trx_parts[i]; + if (part->size < TRX_MIN_KERNEL_SIZE) { + part->name = "loader"; + i++; + } + + part = &trx_parts[i]; + part->name = "kernel"; + i++; + + part = &trx_parts[i]; + part->name = "rootfs"; + + err = mtd_device_register(mtd, trx_parts, trx_nr_parts); + if (err) { + printk(KERN_ALERT PFX "adding TRX partitions failed\n"); + return; + } + + mtd->refresh_device = trxsplit_refresh_partitions; +} + +static int trxsplit_refresh_partitions(struct mtd_info *mtd) +{ + printk(KERN_INFO PFX "refreshing TRX partitions in '%s' (%d,%d)\n", + mtd->name, MTD_BLOCK_MAJOR, mtd->index); + + /* remove old partitions */ + mtd_device_unregister(mtd); + + trxsplit_findtrx(mtd); + if (!trx_mtd) + goto err; + + trxsplit_create_partitions(trx_mtd); + return 1; + +err: + return 0; +} + +static void __init trxsplit_add_mtd(struct mtd_info *mtd) +{ + if (mtd->type != MTD_NORFLASH) { + printk(KERN_INFO PFX "'%s' is not a NOR flash, skipped\n", + mtd->name); + return; + } + + if (!trx_mtd) + trxsplit_findtrx(mtd); +} + +static void __init trxsplit_remove_mtd(struct mtd_info *mtd) +{ + /* nothing to do */ +} + +static struct mtd_notifier trxsplit_notifier __initdata = { + .add = trxsplit_add_mtd, + .remove = trxsplit_remove_mtd, +}; + +static void __init trxsplit_scan(void) +{ + register_mtd_user(&trxsplit_notifier); + unregister_mtd_user(&trxsplit_notifier); +} + +static int __init trxsplit_init(void) +{ + trxsplit_scan(); + + if (trx_mtd) { + printk(KERN_INFO PFX "creating TRX partitions in '%s' " + "(%d,%d)\n", trx_mtd->name, MTD_BLOCK_MAJOR, + trx_mtd->index); + trxsplit_create_partitions(trx_mtd); + } + + return 0; +} + +late_initcall(trxsplit_init); diff --git a/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.c b/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.c new file mode 100644 index 0000000..7fbabb0 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.c @@ -0,0 +1,1219 @@ +/* + * ADM5120 built-in ethernet switch driver + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This code was based on a driver for Linux 2.6.xx by Jeroen Vreeken. + * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 + * NAPI extension for the Jeroen's driver + * Copyright Thomas Langer (Thomas.Langer@infineon.com), 2007 + * Copyright Friedrich Beckmann (Friedrich.Beckmann@infineon.com), 2007 + * Inspiration for the Jeroen's driver came from the ADMtek 2.4 driver. + * Copyright ADMtek Inc. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/interrupt.h> +#include <linux/ioport.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/io.h> +#include <linux/irq.h> + +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/skbuff.h> + +#include <asm/mipsregs.h> + +#include <asm/mach-adm5120/adm5120_info.h> +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_switch.h> + +#include "adm5120sw.h" +#include <linux/dma-mapping.h> + +#define DRV_NAME "adm5120-switch" +#define DRV_DESC "ADM5120 built-in ethernet switch driver" +#define DRV_VERSION "0.1.1" + +#define CONFIG_ADM5120_SWITCH_NAPI 1 +#undef CONFIG_ADM5120_SWITCH_DEBUG + +/* ------------------------------------------------------------------------ */ + +#ifdef CONFIG_ADM5120_SWITCH_DEBUG +#define SW_DBG(f, a...) printk(KERN_DEBUG "%s: " f, DRV_NAME , ## a) +#else +#define SW_DBG(f, a...) do {} while (0) +#endif +#define SW_ERR(f, a...) printk(KERN_ERR "%s: " f, DRV_NAME , ## a) +#define SW_INFO(f, a...) printk(KERN_INFO "%s: " f, DRV_NAME , ## a) + +#define SWITCH_NUM_PORTS 6 +#define ETH_CSUM_LEN 4 + +#define RX_MAX_PKTLEN 1550 +#define RX_RING_SIZE 64 + +#define TX_RING_SIZE 32 +#define TX_QUEUE_LEN 28 /* Limit ring entries actually used. */ +#define TX_TIMEOUT (HZ * 400) + +#define RX_DESCS_SIZE (RX_RING_SIZE * sizeof(struct dma_desc *)) +#define RX_SKBS_SIZE (RX_RING_SIZE * sizeof(struct sk_buff *)) +#define TX_DESCS_SIZE (TX_RING_SIZE * sizeof(struct dma_desc *)) +#define TX_SKBS_SIZE (TX_RING_SIZE * sizeof(struct sk_buff *)) + +#define SKB_ALLOC_LEN (RX_MAX_PKTLEN + 32) +#define SKB_RESERVE_LEN (NET_IP_ALIGN + NET_SKB_PAD) + +#define SWITCH_INTS_HIGH (SWITCH_INT_SHD | SWITCH_INT_RHD | SWITCH_INT_HDF) +#define SWITCH_INTS_LOW (SWITCH_INT_SLD | SWITCH_INT_RLD | SWITCH_INT_LDF) +#define SWITCH_INTS_ERR (SWITCH_INT_RDE | SWITCH_INT_SDE | SWITCH_INT_CPUH) +#define SWITCH_INTS_Q (SWITCH_INT_P0QF | SWITCH_INT_P1QF | SWITCH_INT_P2QF | \ + SWITCH_INT_P3QF | SWITCH_INT_P4QF | SWITCH_INT_P5QF | \ + SWITCH_INT_CPQF | SWITCH_INT_GQF) + +#define SWITCH_INTS_ALL (SWITCH_INTS_HIGH | SWITCH_INTS_LOW | \ + SWITCH_INTS_ERR | SWITCH_INTS_Q | \ + SWITCH_INT_MD | SWITCH_INT_PSC) + +#define SWITCH_INTS_USED (SWITCH_INTS_LOW | SWITCH_INT_PSC) +#define SWITCH_INTS_POLL (SWITCH_INT_RLD | SWITCH_INT_LDF | SWITCH_INT_SLD) + +/* ------------------------------------------------------------------------ */ + +struct adm5120_if_priv { + struct net_device *dev; + + unsigned int vlan_no; + unsigned int port_mask; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + struct napi_struct napi; +#endif +}; + +struct dma_desc { + __u32 buf1; +#define DESC_OWN (1UL << 31) /* Owned by the switch */ +#define DESC_EOR (1UL << 28) /* End of Ring */ +#define DESC_ADDR_MASK 0x1FFFFFF +#define DESC_ADDR(x) ((__u32)(x) & DESC_ADDR_MASK) + __u32 buf2; +#define DESC_BUF2_EN (1UL << 31) /* Buffer 2 enable */ + __u32 buflen; + __u32 misc; +/* definitions for tx/rx descriptors */ +#define DESC_PKTLEN_SHIFT 16 +#define DESC_PKTLEN_MASK 0x7FF +/* tx descriptor specific part */ +#define DESC_CSUM (1UL << 31) /* Append checksum */ +#define DESC_DSTPORT_SHIFT 8 +#define DESC_DSTPORT_MASK 0x3F +#define DESC_VLAN_MASK 0x3F +/* rx descriptor specific part */ +#define DESC_SRCPORT_SHIFT 12 +#define DESC_SRCPORT_MASK 0x7 +#define DESC_DA_MASK 0x3 +#define DESC_DA_SHIFT 4 +#define DESC_IPCSUM_FAIL (1UL << 3) /* IP checksum fail */ +#define DESC_VLAN_TAG (1UL << 2) /* VLAN tag present */ +#define DESC_TYPE_MASK 0x3 /* mask for Packet type */ +#define DESC_TYPE_IP 0x0 /* IP packet */ +#define DESC_TYPE_PPPoE 0x1 /* PPPoE packet */ +} __attribute__ ((aligned(16))); + +/* ------------------------------------------------------------------------ */ + +static int adm5120_nrdevs; + +static struct net_device *adm5120_devs[SWITCH_NUM_PORTS]; +/* Lookup table port -> device */ +static struct net_device *adm5120_port[SWITCH_NUM_PORTS]; + +static struct dma_desc *txl_descs; +static struct dma_desc *rxl_descs; + +static dma_addr_t txl_descs_dma; +static dma_addr_t rxl_descs_dma; + +static struct sk_buff **txl_skbuff; +static struct sk_buff **rxl_skbuff; + +static unsigned int cur_rxl, dirty_rxl; /* producer/consumer ring indices */ +static unsigned int cur_txl, dirty_txl; + +static unsigned int sw_used; + +static DEFINE_SPINLOCK(tx_lock); + +/* ------------------------------------------------------------------------ */ + +static inline u32 sw_read_reg(u32 reg) +{ + return __raw_readl((void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); +} + +static inline void sw_write_reg(u32 reg, u32 val) +{ + __raw_writel(val, (void __iomem *)KSEG1ADDR(ADM5120_SWITCH_BASE)+reg); +} + +static inline void sw_int_mask(u32 mask) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_MASK); + t |= mask; + sw_write_reg(SWITCH_REG_INT_MASK, t); +} + +static inline void sw_int_unmask(u32 mask) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_MASK); + t &= ~mask; + sw_write_reg(SWITCH_REG_INT_MASK, t); +} + +static inline void sw_int_ack(u32 mask) +{ + sw_write_reg(SWITCH_REG_INT_STATUS, mask); +} + +static inline u32 sw_int_status(void) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_INT_STATUS); + t &= ~sw_read_reg(SWITCH_REG_INT_MASK); + return t; +} + +static inline u32 desc_get_srcport(struct dma_desc *desc) +{ + return (desc->misc >> DESC_SRCPORT_SHIFT) & DESC_SRCPORT_MASK; +} + +static inline u32 desc_get_pktlen(struct dma_desc *desc) +{ + return (desc->misc >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK; +} + +static inline int desc_ipcsum_fail(struct dma_desc *desc) +{ + return ((desc->misc & DESC_IPCSUM_FAIL) != 0); +} + +/* ------------------------------------------------------------------------ */ + +#ifdef CONFIG_ADM5120_SWITCH_DEBUG +static void sw_dump_desc(char *label, struct dma_desc *desc, int tx) +{ + u32 t; + + SW_DBG("%s %s desc/%p\n", label, tx ? "tx" : "rx", desc); + + t = desc->buf1; + SW_DBG(" buf1 %08X addr=%08X; len=%08X %s%s\n", t, + t & DESC_ADDR_MASK, + desc->buflen, + (t & DESC_OWN) ? "SWITCH" : "CPU", + (t & DESC_EOR) ? " RE" : ""); + + t = desc->buf2; + SW_DBG(" buf2 %08X addr=%08X%s\n", desc->buf2, + t & DESC_ADDR_MASK, + (t & DESC_BUF2_EN) ? " EN" : ""); + + t = desc->misc; + if (tx) + SW_DBG(" misc %08X%s pktlen=%04X ports=%02X vlan=%02X\n", t, + (t & DESC_CSUM) ? " CSUM" : "", + (t >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK, + (t >> DESC_DSTPORT_SHIFT) & DESC_DSTPORT_MASK, + t & DESC_VLAN_MASK); + else + SW_DBG(" misc %08X pktlen=%04X port=%d DA=%d%s%s type=%d\n", + t, + (t >> DESC_PKTLEN_SHIFT) & DESC_PKTLEN_MASK, + (t >> DESC_SRCPORT_SHIFT) & DESC_SRCPORT_MASK, + (t >> DESC_DA_SHIFT) & DESC_DA_MASK, + (t & DESC_IPCSUM_FAIL) ? " IPCF" : "", + (t & DESC_VLAN_TAG) ? " VLAN" : "", + (t & DESC_TYPE_MASK)); +} + +static void sw_dump_intr_mask(char *label, u32 mask) +{ + SW_DBG("%s %08X%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s\n", + label, mask, + (mask & SWITCH_INT_SHD) ? " SHD" : "", + (mask & SWITCH_INT_SLD) ? " SLD" : "", + (mask & SWITCH_INT_RHD) ? " RHD" : "", + (mask & SWITCH_INT_RLD) ? " RLD" : "", + (mask & SWITCH_INT_HDF) ? " HDF" : "", + (mask & SWITCH_INT_LDF) ? " LDF" : "", + (mask & SWITCH_INT_P0QF) ? " P0QF" : "", + (mask & SWITCH_INT_P1QF) ? " P1QF" : "", + (mask & SWITCH_INT_P2QF) ? " P2QF" : "", + (mask & SWITCH_INT_P3QF) ? " P3QF" : "", + (mask & SWITCH_INT_P4QF) ? " P4QF" : "", + (mask & SWITCH_INT_CPQF) ? " CPQF" : "", + (mask & SWITCH_INT_GQF) ? " GQF" : "", + (mask & SWITCH_INT_MD) ? " MD" : "", + (mask & SWITCH_INT_BCS) ? " BCS" : "", + (mask & SWITCH_INT_PSC) ? " PSC" : "", + (mask & SWITCH_INT_ID) ? " ID" : "", + (mask & SWITCH_INT_W0TE) ? " W0TE" : "", + (mask & SWITCH_INT_W1TE) ? " W1TE" : "", + (mask & SWITCH_INT_RDE) ? " RDE" : "", + (mask & SWITCH_INT_SDE) ? " SDE" : "", + (mask & SWITCH_INT_CPUH) ? " CPUH" : ""); +} + +static void sw_dump_regs(void) +{ + u32 t; + + t = sw_read_reg(SWITCH_REG_PHY_STATUS); + SW_DBG("phy_status: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_CPUP_CONF); + SW_DBG("cpup_conf: %08X%s%s%s\n", t, + (t & CPUP_CONF_DCPUP) ? " DCPUP" : "", + (t & CPUP_CONF_CRCP) ? " CRCP" : "", + (t & CPUP_CONF_BTM) ? " BTM" : ""); + + t = sw_read_reg(SWITCH_REG_PORT_CONF0); + SW_DBG("port_conf0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PORT_CONF1); + SW_DBG("port_conf1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PORT_CONF2); + SW_DBG("port_conf2: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_VLAN_G1); + SW_DBG("vlan g1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_VLAN_G2); + SW_DBG("vlan g2: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_BW_CNTL0); + SW_DBG("bw_cntl0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_BW_CNTL1); + SW_DBG("bw_cntl1: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_PHY_CNTL0); + SW_DBG("phy_cntl0: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL1); + SW_DBG("phy_cntl1: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL2); + SW_DBG("phy_cntl2: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL3); + SW_DBG("phy_cntl3: %08X\n", t); + t = sw_read_reg(SWITCH_REG_PHY_CNTL4); + SW_DBG("phy_cntl4: %08X\n", t); + + t = sw_read_reg(SWITCH_REG_INT_STATUS); + sw_dump_intr_mask("int_status: ", t); + + t = sw_read_reg(SWITCH_REG_INT_MASK); + sw_dump_intr_mask("int_mask: ", t); + + t = sw_read_reg(SWITCH_REG_SHDA); + SW_DBG("shda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_SLDA); + SW_DBG("slda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_RHDA); + SW_DBG("rhda: %08X\n", t); + t = sw_read_reg(SWITCH_REG_RLDA); + SW_DBG("rlda: %08X\n", t); +} +#else +static inline void sw_dump_desc(char *label, struct dma_desc *desc, int tx) {} +static void sw_dump_intr_mask(char *label, u32 mask) {} +static inline void sw_dump_regs(void) {} +#endif /* CONFIG_ADM5120_SWITCH_DEBUG */ + +/* ------------------------------------------------------------------------ */ + +static inline void adm5120_rx_dma_update(struct dma_desc *desc, + struct sk_buff *skb, int end) +{ + desc->misc = 0; + desc->buf2 = 0; + desc->buflen = RX_MAX_PKTLEN; + desc->buf1 = DESC_ADDR(skb->data) | + DESC_OWN | (end ? DESC_EOR : 0); +} + +static void adm5120_switch_rx_refill(void) +{ + unsigned int entry; + + for (; cur_rxl - dirty_rxl > 0; dirty_rxl++) { + struct dma_desc *desc; + struct sk_buff *skb; + + entry = dirty_rxl % RX_RING_SIZE; + desc = &rxl_descs[entry]; + + skb = rxl_skbuff[entry]; + if (skb == NULL) { + skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); + if (skb) { + skb_reserve(skb, SKB_RESERVE_LEN); + rxl_skbuff[entry] = skb; + } else { + SW_ERR("no memory for skb\n"); + desc->buflen = 0; + desc->buf2 = 0; + desc->misc = 0; + desc->buf1 = (desc->buf1 & DESC_EOR) | DESC_OWN; + break; + } + } + + desc->buf2 = 0; + desc->buflen = RX_MAX_PKTLEN; + desc->misc = 0; + desc->buf1 = (desc->buf1 & DESC_EOR) | DESC_OWN | + DESC_ADDR(skb->data); + } +} + +static int adm5120_switch_rx(int limit) +{ + unsigned int done = 0; + + SW_DBG("rx start, limit=%d, cur_rxl=%u, dirty_rxl=%u\n", + limit, cur_rxl, dirty_rxl); + + while (done < limit) { + int entry = cur_rxl % RX_RING_SIZE; + struct dma_desc *desc = &rxl_descs[entry]; + struct net_device *rdev; + unsigned int port; + + if (desc->buf1 & DESC_OWN) + break; + + if (dirty_rxl + RX_RING_SIZE == cur_rxl) + break; + + port = desc_get_srcport(desc); + rdev = adm5120_port[port]; + + SW_DBG("rx descriptor %u, desc=%p, skb=%p\n", entry, desc, + rxl_skbuff[entry]); + + if ((rdev) && netif_running(rdev)) { + struct sk_buff *skb = rxl_skbuff[entry]; + int pktlen; + + pktlen = desc_get_pktlen(desc); + pktlen -= ETH_CSUM_LEN; + + if ((pktlen == 0) || desc_ipcsum_fail(desc)) { + rdev->stats.rx_errors++; + if (pktlen == 0) + rdev->stats.rx_length_errors++; + if (desc_ipcsum_fail(desc)) + rdev->stats.rx_crc_errors++; + SW_DBG("rx error, recycling skb %u\n", entry); + } else { + skb_put(skb, pktlen); + + skb->dev = rdev; + skb->protocol = eth_type_trans(skb, rdev); + skb->ip_summed = CHECKSUM_UNNECESSARY; + + dma_cache_wback_inv((unsigned long)skb->data, + skb->len); + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + netif_receive_skb(skb); +#else + netif_rx(skb); +#endif + + rdev->last_rx = jiffies; + rdev->stats.rx_packets++; + rdev->stats.rx_bytes += pktlen; + + rxl_skbuff[entry] = NULL; + done++; + } + } else { + SW_DBG("no rx device, recycling skb %u\n", entry); + } + + cur_rxl++; + if (cur_rxl - dirty_rxl > RX_RING_SIZE / 4) + adm5120_switch_rx_refill(); + } + + adm5120_switch_rx_refill(); + + SW_DBG("rx finished, cur_rxl=%u, dirty_rxl=%u, processed %d\n", + cur_rxl, dirty_rxl, done); + + return done; +} + +static void adm5120_switch_tx(void) +{ + unsigned int entry; + + spin_lock(&tx_lock); + entry = dirty_txl % TX_RING_SIZE; + while (dirty_txl != cur_txl) { + struct dma_desc *desc = &txl_descs[entry]; + struct sk_buff *skb = txl_skbuff[entry]; + + if (desc->buf1 & DESC_OWN) + break; + + if (netif_running(skb->dev)) { + skb->dev->stats.tx_bytes += skb->len; + skb->dev->stats.tx_packets++; + } + + dev_kfree_skb_irq(skb); + txl_skbuff[entry] = NULL; + entry = (++dirty_txl) % TX_RING_SIZE; + } + + if ((cur_txl - dirty_txl) < TX_QUEUE_LEN - 4) { + int i; + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if (!adm5120_devs[i]) + continue; + netif_wake_queue(adm5120_devs[i]); + } + } + spin_unlock(&tx_lock); +} + +#ifdef CONFIG_ADM5120_SWITCH_NAPI +static int adm5120_if_poll(struct napi_struct *napi, int limit) +{ + struct adm5120_if_priv *priv = container_of(napi, + struct adm5120_if_priv, napi); + struct net_device *dev __maybe_unused = priv->dev; + int done; + u32 status; + + sw_int_ack(SWITCH_INTS_POLL); + + SW_DBG("%s: processing TX ring\n", dev->name); + adm5120_switch_tx(); + + SW_DBG("%s: processing RX ring\n", dev->name); + done = adm5120_switch_rx(limit); + + status = sw_int_status() & SWITCH_INTS_POLL; + if ((done < limit) && (!status)) { + SW_DBG("disable polling mode for %s\n", dev->name); + napi_complete(napi); + sw_int_unmask(SWITCH_INTS_POLL); + return 0; + } + + SW_DBG("%s still in polling mode, done=%d, status=%x\n", + dev->name, done, status); + return 1; +} +#endif /* CONFIG_ADM5120_SWITCH_NAPI */ + + +static irqreturn_t adm5120_switch_irq(int irq, void *dev_id) +{ + u32 status; + + status = sw_int_status(); + status &= SWITCH_INTS_ALL; + if (!status) + return IRQ_NONE; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + sw_int_ack(status & ~SWITCH_INTS_POLL); + + if (status & SWITCH_INTS_POLL) { + struct net_device *dev = dev_id; + struct adm5120_if_priv *priv = netdev_priv(dev); + + sw_dump_intr_mask("poll ints", status); + SW_DBG("enable polling mode for %s\n", dev->name); + sw_int_mask(SWITCH_INTS_POLL); + napi_schedule(&priv->napi); + } +#else + sw_int_ack(status); + + if (status & (SWITCH_INT_RLD | SWITCH_INT_LDF)) + adm5120_switch_rx(RX_RING_SIZE); + + if (status & SWITCH_INT_SLD) + adm5120_switch_tx(); +#endif + + return IRQ_HANDLED; +} + +static void adm5120_set_bw(char *matrix) +{ + unsigned long val; + + /* Port 0 to 3 are set using the bandwidth control 0 register */ + val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24); + sw_write_reg(SWITCH_REG_BW_CNTL0, val); + + /* Port 4 and 5 are set using the bandwidth control 1 register */ + val = matrix[4]; + if (matrix[5] == 1) + sw_write_reg(SWITCH_REG_BW_CNTL1, val | 0x80000000); + else + sw_write_reg(SWITCH_REG_BW_CNTL1, val & ~0x8000000); + + SW_DBG("D: ctl0 0x%ux, ctl1 0x%ux\n", sw_read_reg(SWITCH_REG_BW_CNTL0), + sw_read_reg(SWITCH_REG_BW_CNTL1)); +} + +static void adm5120_switch_tx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + memset(desc, 0, num * sizeof(*desc)); + desc[num-1].buf1 |= DESC_EOR; + memset(skbl, 0, sizeof(struct skb *) * num); + + cur_txl = 0; + dirty_txl = 0; +} + +static void adm5120_switch_rx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + int i; + + memset(desc, 0, num * sizeof(*desc)); + for (i = 0; i < num; i++) { + skbl[i] = dev_alloc_skb(SKB_ALLOC_LEN); + if (!skbl[i]) { + i = num; + break; + } + skb_reserve(skbl[i], SKB_RESERVE_LEN); + adm5120_rx_dma_update(&desc[i], skbl[i], (num - 1 == i)); + } + + cur_rxl = 0; + dirty_rxl = 0; +} + +static int adm5120_switch_tx_ring_alloc(void) +{ + int err; + + txl_descs = dma_alloc_coherent(NULL, TX_DESCS_SIZE, &txl_descs_dma, + GFP_ATOMIC); + if (!txl_descs) { + err = -ENOMEM; + goto err; + } + + txl_skbuff = kzalloc(TX_SKBS_SIZE, GFP_KERNEL); + if (!txl_skbuff) { + err = -ENOMEM; + goto err; + } + + return 0; + +err: + return err; +} + +static void adm5120_switch_tx_ring_free(void) +{ + int i; + + if (txl_skbuff) { + for (i = 0; i < TX_RING_SIZE; i++) + if (txl_skbuff[i]) + kfree_skb(txl_skbuff[i]); + kfree(txl_skbuff); + } + + if (txl_descs) + dma_free_coherent(NULL, TX_DESCS_SIZE, txl_descs, + txl_descs_dma); +} + +static int adm5120_switch_rx_ring_alloc(void) +{ + int err; + int i; + + /* init RX ring */ + rxl_descs = dma_alloc_coherent(NULL, RX_DESCS_SIZE, &rxl_descs_dma, + GFP_ATOMIC); + if (!rxl_descs) { + err = -ENOMEM; + goto err; + } + + rxl_skbuff = kzalloc(RX_SKBS_SIZE, GFP_KERNEL); + if (!rxl_skbuff) { + err = -ENOMEM; + goto err; + } + + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb; + skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); + if (!skb) { + err = -ENOMEM; + goto err; + } + rxl_skbuff[i] = skb; + skb_reserve(skb, SKB_RESERVE_LEN); + } + + return 0; + +err: + return err; +} + +static void adm5120_switch_rx_ring_free(void) +{ + int i; + + if (rxl_skbuff) { + for (i = 0; i < RX_RING_SIZE; i++) + if (rxl_skbuff[i]) + kfree_skb(rxl_skbuff[i]); + kfree(rxl_skbuff); + } + + if (rxl_descs) + dma_free_coherent(NULL, RX_DESCS_SIZE, rxl_descs, + rxl_descs_dma); +} + +static void adm5120_write_mac(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + unsigned char *mac = dev->dev_addr; + u32 t; + + t = mac[2] | (mac[3] << MAC_WT1_MAC3_SHIFT) | + (mac[4] << MAC_WT1_MAC4_SHIFT) | (mac[5] << MAC_WT1_MAC5_SHIFT); + sw_write_reg(SWITCH_REG_MAC_WT1, t); + + t = (mac[0] << MAC_WT0_MAC0_SHIFT) | (mac[1] << MAC_WT0_MAC1_SHIFT) | + MAC_WT0_MAWC | MAC_WT0_WVE | (priv->vlan_no<<3); + + sw_write_reg(SWITCH_REG_MAC_WT0, t); + + while (!(sw_read_reg(SWITCH_REG_MAC_WT0) & MAC_WT0_MWD)) + ; +} + +static void adm5120_set_vlan(char *matrix) +{ + unsigned long val; + int vlan_port, port; + + val = matrix[0] + (matrix[1]<<8) + (matrix[2]<<16) + (matrix[3]<<24); + sw_write_reg(SWITCH_REG_VLAN_G1, val); + val = matrix[4] + (matrix[5]<<8); + sw_write_reg(SWITCH_REG_VLAN_G2, val); + + /* Now set/update the port vs. device lookup table */ + for (port = 0; port < SWITCH_NUM_PORTS; port++) { + for (vlan_port = 0; vlan_port < SWITCH_NUM_PORTS && !(matrix[vlan_port] & (0x00000001 << port)); vlan_port++) + ; + if (vlan_port < SWITCH_NUM_PORTS) + adm5120_port[port] = adm5120_devs[vlan_port]; + else + adm5120_port[port] = NULL; + } +} + +static void adm5120_switch_set_vlan_mac(unsigned int vlan, unsigned char *mac) +{ + u32 t; + + t = mac[2] | (mac[3] << MAC_WT1_MAC3_SHIFT) + | (mac[4] << MAC_WT1_MAC4_SHIFT) + | (mac[5] << MAC_WT1_MAC5_SHIFT); + sw_write_reg(SWITCH_REG_MAC_WT1, t); + + t = (mac[0] << MAC_WT0_MAC0_SHIFT) | (mac[1] << MAC_WT0_MAC1_SHIFT) | + MAC_WT0_MAWC | MAC_WT0_WVE | (vlan << MAC_WT0_WVN_SHIFT) | + (MAC_WT0_WAF_STATIC << MAC_WT0_WAF_SHIFT); + sw_write_reg(SWITCH_REG_MAC_WT0, t); + + do { + t = sw_read_reg(SWITCH_REG_MAC_WT0); + } while ((t & MAC_WT0_MWD) == 0); +} + +static void adm5120_switch_set_vlan_ports(unsigned int vlan, u32 ports) +{ + unsigned int reg; + u32 t; + + if (vlan < 4) + reg = SWITCH_REG_VLAN_G1; + else { + vlan -= 4; + reg = SWITCH_REG_VLAN_G2; + } + + t = sw_read_reg(reg); + t &= ~(0xFF << (vlan*8)); + t |= (ports << (vlan*8)); + sw_write_reg(reg, t); +} + +/* ------------------------------------------------------------------------ */ + +#ifdef CONFIG_ADM5120_SWITCH_NAPI +static inline void adm5120_if_napi_enable(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + napi_enable(&priv->napi); +} + +static inline void adm5120_if_napi_disable(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + napi_disable(&priv->napi); +} +#else +static inline void adm5120_if_napi_enable(struct net_device *dev) {} +static inline void adm5120_if_napi_disable(struct net_device *dev) {} +#endif /* CONFIG_ADM5120_SWITCH_NAPI */ + +static int adm5120_if_open(struct net_device *dev) +{ + u32 t; + int err; + int i; + + adm5120_if_napi_enable(dev); + + err = request_irq(dev->irq, adm5120_switch_irq, IRQF_SHARED, + dev->name, dev); + if (err) { + SW_ERR("unable to get irq for %s\n", dev->name); + goto err; + } + + if (!sw_used++) + /* enable interrupts on first open */ + sw_int_unmask(SWITCH_INTS_USED); + + /* enable (additional) port */ + t = sw_read_reg(SWITCH_REG_PORT_CONF0); + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if (dev == adm5120_devs[i]) + t &= ~adm5120_eth_vlans[i]; + } + sw_write_reg(SWITCH_REG_PORT_CONF0, t); + + netif_start_queue(dev); + + return 0; + +err: + adm5120_if_napi_disable(dev); + return err; +} + +static int adm5120_if_stop(struct net_device *dev) +{ + u32 t; + int i; + + netif_stop_queue(dev); + adm5120_if_napi_disable(dev); + + /* disable port if not assigned to other devices */ + t = sw_read_reg(SWITCH_REG_PORT_CONF0); + t |= SWITCH_PORTS_NOCPU; + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if ((dev != adm5120_devs[i]) && netif_running(adm5120_devs[i])) + t &= ~adm5120_eth_vlans[i]; + } + sw_write_reg(SWITCH_REG_PORT_CONF0, t); + + if (!--sw_used) + sw_int_mask(SWITCH_INTS_USED); + + free_irq(dev->irq, dev); + + return 0; +} + +static int adm5120_if_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) +{ + struct dma_desc *desc; + struct adm5120_if_priv *priv = netdev_priv(dev); + unsigned int entry; + unsigned long data; + int i; + + /* lock switch irq */ + spin_lock_irq(&tx_lock); + + /* calculate the next TX descriptor entry. */ + entry = cur_txl % TX_RING_SIZE; + + desc = &txl_descs[entry]; + if (desc->buf1 & DESC_OWN) { + /* We want to write a packet but the TX queue is still + * occupied by the DMA. We are faster than the DMA... */ + SW_DBG("%s unable to transmit, packet dopped\n", dev->name); + dev_kfree_skb(skb); + dev->stats.tx_dropped++; + return 0; + } + + txl_skbuff[entry] = skb; + data = (desc->buf1 & DESC_EOR); + data |= DESC_ADDR(skb->data); + + desc->misc = + ((skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len) << DESC_PKTLEN_SHIFT) | + (0x1 << priv->vlan_no); + + desc->buflen = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; + + desc->buf1 = data | DESC_OWN; + sw_write_reg(SWITCH_REG_SEND_TRIG, SEND_TRIG_STL); + + cur_txl++; + if (cur_txl == dirty_txl + TX_QUEUE_LEN) { + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + if (!adm5120_devs[i]) + continue; + netif_stop_queue(adm5120_devs[i]); + } + } + + dev->trans_start = jiffies; + + spin_unlock_irq(&tx_lock); + + return 0; +} + +static void adm5120_if_tx_timeout(struct net_device *dev) +{ + SW_INFO("TX timeout on %s\n", dev->name); +} + +static void adm5120_if_set_rx_mode(struct net_device *dev) +{ + struct adm5120_if_priv *priv = netdev_priv(dev); + u32 ports; + u32 t; + + ports = adm5120_eth_vlans[priv->vlan_no] & SWITCH_PORTS_NOCPU; + + t = sw_read_reg(SWITCH_REG_CPUP_CONF); + if (dev->flags & IFF_PROMISC) + /* enable unknown packets */ + t &= ~(ports << CPUP_CONF_DUNP_SHIFT); + else + /* disable unknown packets */ + t |= (ports << CPUP_CONF_DUNP_SHIFT); + + if (dev->flags & IFF_PROMISC || dev->flags & IFF_ALLMULTI || + netdev_mc_count(dev)) + /* enable multicast packets */ + t &= ~(ports << CPUP_CONF_DMCP_SHIFT); + else + /* disable multicast packets */ + t |= (ports << CPUP_CONF_DMCP_SHIFT); + + /* If there is any port configured to be in promiscuous mode, then the */ + /* Bridge Test Mode has to be activated. This will result in */ + /* transporting also packets learned in another VLAN to be forwarded */ + /* to the CPU. */ + /* The difficult scenario is when we want to build a bridge on the CPU.*/ + /* Assume we have port0 and the CPU port in VLAN0 and port1 and the */ + /* CPU port in VLAN1. Now we build a bridge on the CPU between */ + /* VLAN0 and VLAN1. Both ports of the VLANs are set in promisc mode. */ + /* Now assume a packet with ethernet source address 99 enters port 0 */ + /* It will be forwarded to the CPU because it is unknown. Then the */ + /* bridge in the CPU will send it to VLAN1 and it goes out at port 1. */ + /* When now a packet with ethernet destination address 99 comes in at */ + /* port 1 in VLAN1, then the switch has learned that this address is */ + /* located at port 0 in VLAN0. Therefore the switch will drop */ + /* this packet. In order to avoid this and to send the packet still */ + /* to the CPU, the Bridge Test Mode has to be activated. */ + + /* Check if there is any vlan in promisc mode. */ + if (~t & (SWITCH_PORTS_NOCPU << CPUP_CONF_DUNP_SHIFT)) + t |= CPUP_CONF_BTM; /* Enable Bridge Testing Mode */ + else + t &= ~CPUP_CONF_BTM; /* Disable Bridge Testing Mode */ + + sw_write_reg(SWITCH_REG_CPUP_CONF, t); + +} + +static int adm5120_if_set_mac_address(struct net_device *dev, void *p) +{ + int ret; + + ret = eth_mac_addr(dev, p); + if (ret) + return ret; + + adm5120_write_mac(dev); + return 0; +} + +static int adm5120_if_do_ioctl(struct net_device *dev, struct ifreq *rq, + int cmd) +{ + int err; + struct adm5120_sw_info info; + struct adm5120_if_priv *priv = netdev_priv(dev); + + switch (cmd) { + case SIOCGADMINFO: + info.magic = 0x5120; + info.ports = adm5120_nrdevs; + info.vlan = priv->vlan_no; + err = copy_to_user(rq->ifr_data, &info, sizeof(info)); + if (err) + return -EFAULT; + break; + case SIOCSMATRIX: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = copy_from_user(adm5120_eth_vlans, rq->ifr_data, + sizeof(adm5120_eth_vlans)); + if (err) + return -EFAULT; + adm5120_set_vlan(adm5120_eth_vlans); + break; + case SIOCGMATRIX: + err = copy_to_user(rq->ifr_data, adm5120_eth_vlans, + sizeof(adm5120_eth_vlans)); + if (err) + return -EFAULT; + break; + default: + return -EOPNOTSUPP; + } + return 0; +} + +static const struct net_device_ops adm5120sw_netdev_ops = { + .ndo_open = adm5120_if_open, + .ndo_stop = adm5120_if_stop, + .ndo_start_xmit = adm5120_if_hard_start_xmit, + .ndo_set_rx_mode = adm5120_if_set_rx_mode, + .ndo_do_ioctl = adm5120_if_do_ioctl, + .ndo_tx_timeout = adm5120_if_tx_timeout, + .ndo_validate_addr = eth_validate_addr, + .ndo_change_mtu = eth_change_mtu, + .ndo_set_mac_address = adm5120_if_set_mac_address, +}; + +static struct net_device *adm5120_if_alloc(void) +{ + struct net_device *dev; + struct adm5120_if_priv *priv; + + dev = alloc_etherdev(sizeof(*priv)); + if (!dev) + return NULL; + + priv = netdev_priv(dev); + priv->dev = dev; + + dev->irq = ADM5120_IRQ_SWITCH; + dev->netdev_ops = &adm5120sw_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + +#ifdef CONFIG_ADM5120_SWITCH_NAPI + netif_napi_add(dev, &priv->napi, adm5120_if_poll, 64); +#endif + + return dev; +} + +/* ------------------------------------------------------------------------ */ + +static void adm5120_switch_cleanup(void) +{ + int i; + + /* disable interrupts */ + sw_int_mask(SWITCH_INTS_ALL); + + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + struct net_device *dev = adm5120_devs[i]; + if (dev) { + unregister_netdev(dev); + free_netdev(dev); + } + } + + adm5120_switch_tx_ring_free(); + adm5120_switch_rx_ring_free(); +} + +static int adm5120_switch_probe(struct platform_device *pdev) +{ + u32 t; + int i, err; + + adm5120_nrdevs = adm5120_eth_num_ports; + + t = CPUP_CONF_DCPUP | CPUP_CONF_CRCP | + SWITCH_PORTS_NOCPU << CPUP_CONF_DUNP_SHIFT | + SWITCH_PORTS_NOCPU << CPUP_CONF_DMCP_SHIFT ; + sw_write_reg(SWITCH_REG_CPUP_CONF, t); + + t = (SWITCH_PORTS_NOCPU << PORT_CONF0_EMCP_SHIFT) | + (SWITCH_PORTS_NOCPU << PORT_CONF0_BP_SHIFT) | + (SWITCH_PORTS_NOCPU); + sw_write_reg(SWITCH_REG_PORT_CONF0, t); + + /* setup ports to Autoneg/100M/Full duplex/Auto MDIX */ + t = SWITCH_PORTS_PHY | + (SWITCH_PORTS_PHY << PHY_CNTL2_SC_SHIFT) | + (SWITCH_PORTS_PHY << PHY_CNTL2_DC_SHIFT) | + (SWITCH_PORTS_PHY << PHY_CNTL2_PHYR_SHIFT) | + (SWITCH_PORTS_PHY << PHY_CNTL2_AMDIX_SHIFT) | + PHY_CNTL2_RMAE; + sw_write_reg(SWITCH_REG_PHY_CNTL2, t); + + t = sw_read_reg(SWITCH_REG_PHY_CNTL3); + t |= PHY_CNTL3_RNT; + sw_write_reg(SWITCH_REG_PHY_CNTL3, t); + + /* Force all the packets from all ports are low priority */ + sw_write_reg(SWITCH_REG_PRI_CNTL, 0); + + sw_int_mask(SWITCH_INTS_ALL); + sw_int_ack(SWITCH_INTS_ALL); + + err = adm5120_switch_rx_ring_alloc(); + if (err) + goto err; + + err = adm5120_switch_tx_ring_alloc(); + if (err) + goto err; + + adm5120_switch_tx_ring_reset(txl_descs, txl_skbuff, TX_RING_SIZE); + adm5120_switch_rx_ring_reset(rxl_descs, rxl_skbuff, RX_RING_SIZE); + + sw_write_reg(SWITCH_REG_SHDA, 0); + sw_write_reg(SWITCH_REG_SLDA, KSEG1ADDR(txl_descs)); + sw_write_reg(SWITCH_REG_RHDA, 0); + sw_write_reg(SWITCH_REG_RLDA, KSEG1ADDR(rxl_descs)); + + for (i = 0; i < SWITCH_NUM_PORTS; i++) { + struct net_device *dev; + struct adm5120_if_priv *priv; + + dev = adm5120_if_alloc(); + if (!dev) { + err = -ENOMEM; + goto err; + } + + adm5120_devs[i] = dev; + priv = netdev_priv(dev); + + priv->vlan_no = i; + priv->port_mask = adm5120_eth_vlans[i]; + + memcpy(dev->dev_addr, adm5120_eth_macs[i], 6); + adm5120_write_mac(dev); + + err = register_netdev(dev); + if (err) { + SW_INFO("%s register failed, error=%d\n", + dev->name, err); + goto err; + } + } + + /* setup vlan/port mapping after devs are filled up */ + adm5120_set_vlan(adm5120_eth_vlans); + + /* enable CPU port */ + t = sw_read_reg(SWITCH_REG_CPUP_CONF); + t &= ~CPUP_CONF_DCPUP; + sw_write_reg(SWITCH_REG_CPUP_CONF, t); + + return 0; + +err: + adm5120_switch_cleanup(); + + SW_ERR("init failed\n"); + return err; +} + +static int adm5120_switch_remove(struct platform_device *pdev) +{ + adm5120_switch_cleanup(); + return 0; +} + +static struct platform_driver adm5120_switch_driver = { + .probe = adm5120_switch_probe, + .remove = adm5120_switch_remove, + .driver = { + .name = DRV_NAME, + }, +}; + +/* -------------------------------------------------------------------------- */ + +static int __init adm5120_switch_mod_init(void) +{ + int err; + + pr_info(DRV_DESC " version " DRV_VERSION "\n"); + err = platform_driver_register(&adm5120_switch_driver); + + return err; +} + +static void __exit adm5120_switch_mod_exit(void) +{ + platform_driver_unregister(&adm5120_switch_driver); +} + +module_init(adm5120_switch_mod_init); +module_exit(adm5120_switch_mod_exit); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>"); +MODULE_DESCRIPTION(DRV_DESC); +MODULE_VERSION(DRV_VERSION); diff --git a/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.h b/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.h new file mode 100644 index 0000000..fa9e503 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/net/adm5120sw.h @@ -0,0 +1,23 @@ +/* + * Defines for ADM5120 built in ethernet switch driver + * + * Copyright Jeroen Vreeken (pe1rxq@amsat.org), 2005 + * + * Values come from ADM5120 datasheet and original ADMtek 2.4 driver, + * Copyright ADMtek Inc. + */ + +#ifndef _INCLUDE_ADM5120SW_H_ +#define _INCLUDE_ADM5120SW_H_ + +#define SIOCSMATRIX SIOCDEVPRIVATE +#define SIOCGMATRIX (SIOCDEVPRIVATE + 1) +#define SIOCGADMINFO (SIOCDEVPRIVATE + 2) + +struct adm5120_sw_info { + u16 magic; + u16 ports; + u16 vlan; +}; + +#endif /* _INCLUDE_ADM5120SW_H_ */ diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c new file mode 100644 index 0000000..2d5dc2a --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-dbg.c @@ -0,0 +1,836 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-dbg.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +/*-------------------------------------------------------------------------*/ + +static inline char *ed_typestring(int ed_type) +{ + switch (ed_type) { + case PIPE_CONTROL: + return "ctrl"; + case PIPE_BULK: + return "bulk"; + case PIPE_INTERRUPT: + return "intr"; + case PIPE_ISOCHRONOUS: + return "isoc"; + } + return "(bad ed_type)"; +} + +static inline char *ed_statestring(int state) +{ + switch (state) { + case ED_IDLE: + return "IDLE"; + case ED_UNLINK: + return "UNLINK"; + case ED_OPER: + return "OPER"; + } + return "?STATE"; +} + +static inline char *pipestring(int pipe) +{ + return ed_typestring(usb_pipetype(pipe)); +} + +static inline char *td_pidstring(u32 info) +{ + switch (info & TD_DP) { + case TD_DP_SETUP: + return "SETUP"; + case TD_DP_IN: + return "IN"; + case TD_DP_OUT: + return "OUT"; + } + return "?PID"; +} + +static inline char *td_togglestring(u32 info) +{ + switch (info & TD_T) { + case TD_T_DATA0: + return "DATA0"; + case TD_T_DATA1: + return "DATA1"; + case TD_T_CARRY: + return "CARRY"; + } + return "?TOGGLE"; +} + +/*-------------------------------------------------------------------------*/ + +#ifdef DEBUG + +/* debug| print the main components of an URB + * small: 0) header + data packets 1) just header + */ +static void __attribute__((unused)) +urb_print(struct admhcd *ahcd, struct urb *urb, char *str, int small, int status) +{ + unsigned int pipe = urb->pipe; + + if (!urb->dev || !urb->dev->bus) { + admhc_dbg(ahcd, "%s URB: no dev", str); + return; + } + +#ifndef ADMHC_VERBOSE_DEBUG + if (status != 0) +#endif + admhc_dbg(ahcd, "URB-%s %p dev=%d ep=%d%s-%s flags=%x len=%d/%d " + "stat=%d\n", + str, + urb, + usb_pipedevice(pipe), + usb_pipeendpoint(pipe), + usb_pipeout(pipe) ? "out" : "in", + pipestring(pipe), + urb->transfer_flags, + urb->actual_length, + urb->transfer_buffer_length, + status); + +#ifdef ADMHC_VERBOSE_DEBUG + if (!small) { + int i, len; + + if (usb_pipecontrol(pipe)) { + admhc_dbg(ahcd, "setup(8):"); + for (i = 0; i < 8 ; i++) + printk(KERN_INFO" %02x", ((__u8 *)urb->setup_packet)[i]); + printk(KERN_INFO "\n"); + } + if (urb->transfer_buffer_length > 0 && urb->transfer_buffer) { + admhc_dbg(ahcd, "data(%d/%d):", + urb->actual_length, + urb->transfer_buffer_length); + len = usb_pipeout(pipe) ? + urb->transfer_buffer_length : urb->actual_length; + for (i = 0; i < 16 && i < len; i++) + printk(KERN_INFO " %02x", ((__u8 *)urb->transfer_buffer)[i]); + printk(KERN_INFO "%s stat:%d\n", i < len ? "..." : "", status); + } + } +#endif /* ADMHC_VERBOSE_DEBUG */ +} + +#define admhc_dbg_sw(ahcd, next, size, format, arg...) \ + do { \ + if (next) { \ + unsigned s_len; \ + s_len = scnprintf(*next, *size, format, ## arg); \ + *size -= s_len; *next += s_len; \ + } else \ + admhc_dbg(ahcd, format, ## arg); \ + } while (0); + + +static void admhc_dump_intr_mask(struct admhcd *ahcd, char *label, u32 mask, + char **next, unsigned *size) +{ + admhc_dbg_sw(ahcd, next, size, "%s 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", + label, + mask, + (mask & ADMHC_INTR_INTA) ? " INTA" : "", + (mask & ADMHC_INTR_FATI) ? " FATI" : "", + (mask & ADMHC_INTR_SWI) ? " SWI" : "", + (mask & ADMHC_INTR_TDC) ? " TDC" : "", + (mask & ADMHC_INTR_FNO) ? " FNO" : "", + (mask & ADMHC_INTR_SO) ? " SO" : "", + (mask & ADMHC_INTR_INSM) ? " INSM" : "", + (mask & ADMHC_INTR_BABI) ? " BABI" : "", + (mask & ADMHC_INTR_7) ? " !7!" : "", + (mask & ADMHC_INTR_6) ? " !6!" : "", + (mask & ADMHC_INTR_RESI) ? " RESI" : "", + (mask & ADMHC_INTR_SOFI) ? " SOFI" : "" + ); +} + +static void maybe_print_eds(struct admhcd *ahcd, char *label, u32 value, + char **next, unsigned *size) +{ + if (value) + admhc_dbg_sw(ahcd, next, size, "%s %08x\n", label, value); +} + +static char *buss2string(int state) +{ + switch (state) { + case ADMHC_BUSS_RESET: + return "reset"; + case ADMHC_BUSS_RESUME: + return "resume"; + case ADMHC_BUSS_OPER: + return "operational"; + case ADMHC_BUSS_SUSPEND: + return "suspend"; + } + return "?state"; +} + +static void +admhc_dump_status(struct admhcd *ahcd, char **next, unsigned *size) +{ + struct admhcd_regs __iomem *regs = ahcd->regs; + u32 temp; + + temp = admhc_readl(ahcd, ®s->gencontrol); + admhc_dbg_sw(ahcd, next, size, + "gencontrol 0x%08x%s%s%s%s\n", + temp, + (temp & ADMHC_CTRL_UHFE) ? " UHFE" : "", + (temp & ADMHC_CTRL_SIR) ? " SIR" : "", + (temp & ADMHC_CTRL_DMAA) ? " DMAA" : "", + (temp & ADMHC_CTRL_SR) ? " SR" : "" + ); + + temp = admhc_readl(ahcd, ®s->host_control); + admhc_dbg_sw(ahcd, next, size, + "host_control 0x%08x BUSS=%s%s\n", + temp, + buss2string(temp & ADMHC_HC_BUSS), + (temp & ADMHC_HC_DMAE) ? " DMAE" : "" + ); + + admhc_dump_intr_mask(ahcd, "int_status", + admhc_readl(ahcd, ®s->int_status), + next, size); + admhc_dump_intr_mask(ahcd, "int_enable", + admhc_readl(ahcd, ®s->int_enable), + next, size); + + maybe_print_eds(ahcd, "hosthead", + admhc_readl(ahcd, ®s->hosthead), next, size); +} + +#define dbg_port_sw(hc, num, value, next, size) \ + admhc_dbg_sw(hc, next, size, \ + "portstatus [%d] " \ + "0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ + num, temp, \ + (temp & ADMHC_PS_PRSC) ? " PRSC" : "", \ + (temp & ADMHC_PS_OCIC) ? " OCIC" : "", \ + (temp & ADMHC_PS_PSSC) ? " PSSC" : "", \ + (temp & ADMHC_PS_PESC) ? " PESC" : "", \ + (temp & ADMHC_PS_CSC) ? " CSC" : "", \ + \ + (temp & ADMHC_PS_LSDA) ? " LSDA" : "", \ + (temp & ADMHC_PS_PPS) ? " PPS" : "", \ + (temp & ADMHC_PS_PRS) ? " PRS" : "", \ + (temp & ADMHC_PS_POCI) ? " POCI" : "", \ + (temp & ADMHC_PS_PSS) ? " PSS" : "", \ + \ + (temp & ADMHC_PS_PES) ? " PES" : "", \ + (temp & ADMHC_PS_CCS) ? " CCS" : "" \ + ); + + +static void +admhc_dump_roothub( + struct admhcd *ahcd, + int verbose, + char **next, + unsigned *size) +{ + u32 temp, i; + + temp = admhc_read_rhdesc(ahcd); + if (temp == ~(u32)0) + return; + + if (verbose) { + admhc_dbg_sw(ahcd, next, size, + "rhdesc %08x%s%s%s%s%s%s PPCM=%02x%s%s%s%s NUMP=%d(%d)\n", + temp, + (temp & ADMHC_RH_CRWE) ? " CRWE" : "", + (temp & ADMHC_RH_OCIC) ? " OCIC" : "", + (temp & ADMHC_RH_LPSC) ? " LPSC" : "", + (temp & ADMHC_RH_LPSC) ? " DRWE" : "", + (temp & ADMHC_RH_LPSC) ? " OCI" : "", + (temp & ADMHC_RH_LPSC) ? " LPS" : "", + ((temp & ADMHC_RH_PPCM) >> 16), + (temp & ADMHC_RH_NOCP) ? " NOCP" : "", + (temp & ADMHC_RH_OCPM) ? " OCPM" : "", + (temp & ADMHC_RH_NPS) ? " NPS" : "", + (temp & ADMHC_RH_PSM) ? " PSM" : "", + (temp & ADMHC_RH_NUMP), ahcd->num_ports + ); + } + + for (i = 0; i < ahcd->num_ports; i++) { + temp = admhc_read_portstatus(ahcd, i); + dbg_port_sw(ahcd, i, temp, next, size); + } +} + +static void admhc_dump(struct admhcd *ahcd, int verbose) +{ + admhc_dbg(ahcd, "ADMHC ahcd state\n"); + + /* dumps some of the state we know about */ + admhc_dump_status(ahcd, NULL, NULL); + admhc_dbg(ahcd, "current frame #%04x\n", + admhc_frame_no(ahcd)); + + admhc_dump_roothub(ahcd, verbose, NULL, NULL); +} + +static const char data0[] = "DATA0"; +static const char data1[] = "DATA1"; + +static void admhc_dump_td(const struct admhcd *ahcd, const char *label, + const struct td *td) +{ + u32 tmp; + + admhc_dbg(ahcd, "%s td %p; urb %p index %d; hwNextTD %08x\n", + label, td, + td->urb, td->index, + hc32_to_cpup(ahcd, &td->hwNextTD)); + + tmp = hc32_to_cpup(ahcd, &td->hwINFO); + admhc_dbg(ahcd, " status %08x%s CC=%x EC=%d %s %s ISI=%x FN=%x\n", + tmp, + (tmp & TD_OWN) ? " OWN" : "", + TD_CC_GET(tmp), + TD_EC_GET(tmp), + td_togglestring(tmp), + td_pidstring(tmp), + TD_ISI_GET(tmp), + TD_FN_GET(tmp)); + + tmp = hc32_to_cpup(ahcd, &td->hwCBL); + admhc_dbg(ahcd, " dbp %08x; cbl %08x; LEN=%d%s\n", + hc32_to_cpup(ahcd, &td->hwDBP), + tmp, + TD_BL_GET(tmp), + (tmp & TD_IE) ? " IE" : ""); +} + +/* caller MUST own hcd spinlock if verbose is set! */ +static void __attribute__((unused)) +admhc_dump_ed(const struct admhcd *ahcd, const char *label, + const struct ed *ed, int verbose) +{ + u32 tmp = hc32_to_cpu(ahcd, ed->hwINFO); + + admhc_dbg(ahcd, "%s ed %p %s type %s; next ed %08x\n", + label, + ed, ed_statestring(ed->state), ed_typestring(ed->type), + hc32_to_cpup(ahcd, &ed->hwNextED)); + + admhc_dbg(ahcd, " info %08x MAX=%d%s%s%s%s EP=%d DEV=%d\n", tmp, + ED_MPS_GET(tmp), + (tmp & ED_ISO) ? " ISO" : "", + (tmp & ED_SKIP) ? " SKIP" : "", + (tmp & ED_SPEED_FULL) ? " FULL" : " LOW", + (tmp & ED_INT) ? " INT" : "", + ED_EN_GET(tmp), + ED_FA_GET(tmp)); + + tmp = hc32_to_cpup(ahcd, &ed->hwHeadP); + admhc_dbg(ahcd, " tds: head %08x tail %08x %s%s%s\n", + tmp & TD_MASK, + hc32_to_cpup(ahcd, &ed->hwTailP), + (tmp & ED_C) ? data1 : data0, + (tmp & ED_H) ? " HALT" : "", + verbose ? " td list follows" : " (not listing)"); + + if (verbose) { + struct list_head *tmp; + + /* use ed->td_list because HC concurrently modifies + * hwNextTD as it accumulates ed_donelist. + */ + list_for_each(tmp, &ed->td_list) { + struct td *td; + td = list_entry(tmp, struct td, td_list); + admhc_dump_td(ahcd, " ->", td); + } + } +} + +#else /* ifdef DEBUG */ + +static inline void urb_print(struct admhcd *ahcd, struct urb * urb, char * str, + int small, int status) {} +static inline void admhc_dump_ed(const struct admhcd *ahcd, const char *label, + const struct ed *ed, int verbose) {} +static inline void admhc_dump_td(const struct admhcd *ahcd, const char *label, + const struct td *td) {} +static inline void admhc_dump(struct admhcd *ahcd, int verbose) {} + +#undef ADMHC_VERBOSE_DEBUG + +#endif /* DEBUG */ + +/*-------------------------------------------------------------------------*/ + +#ifdef STUB_DEBUG_FILES + +static inline void create_debug_files(struct admhcd *bus) { } +static inline void remove_debug_files(struct admhcd *bus) { } + +#else + +static int debug_async_open(struct inode *, struct file *); +static int debug_periodic_open(struct inode *, struct file *); +static int debug_registers_open(struct inode *, struct file *); +static ssize_t debug_output(struct file*, char __user*, size_t, loff_t*); +static int debug_close(struct inode *, struct file *); + +static const struct file_operations debug_async_fops = { + .owner = THIS_MODULE, + .open = debug_async_open, + .read = debug_output, + .release = debug_close, + .llseek = default_llseek, +}; +static const struct file_operations debug_periodic_fops = { + .owner = THIS_MODULE, + .open = debug_periodic_open, + .read = debug_output, + .release = debug_close, + .llseek = default_llseek, +}; +static const struct file_operations debug_registers_fops = { + .owner = THIS_MODULE, + .open = debug_registers_open, + .read = debug_output, + .release = debug_close, + .llseek = default_llseek, +}; + +static struct dentry *admhc_debug_root; + +struct debug_buffer { + ssize_t (*fill_func)(struct debug_buffer *); /* fill method */ + struct admhcd *ahcd; + struct mutex mutex; /* protect filling of buffer */ + size_t count; /* number of characters filled into buffer */ + char *page; +}; + +static ssize_t +show_list(struct admhcd *ahcd, char *buf, size_t count, struct ed *ed) +{ + unsigned temp; + unsigned size = count; + + if (!ed) + return 0; + + /* dump a snapshot of the bulk or control schedule */ + while (ed) { + u32 info = hc32_to_cpu(ahcd, ed->hwINFO); + u32 headp = hc32_to_cpu(ahcd, ed->hwHeadP); + u32 tailp = hc32_to_cpu(ahcd, ed->hwTailP); + struct list_head *entry; + struct td *td; + + temp = scnprintf(buf, size, + "ed/%p %s %s %cs dev%d ep%d %s%smax %d %08x%s%s %s" + " h:%08x t:%08x", + ed, + ed_statestring(ed->state), + ed_typestring(ed->type), + (info & ED_SPEED_FULL) ? 'f' : 'l', + info & ED_FA_MASK, + (info >> ED_EN_SHIFT) & ED_EN_MASK, + (info & ED_INT) ? "INT " : "", + (info & ED_ISO) ? "ISO " : "", + (info >> ED_MPS_SHIFT) & ED_MPS_MASK , + info, + (info & ED_SKIP) ? " S" : "", + (headp & ED_H) ? " H" : "", + (headp & ED_C) ? data1 : data0, + headp & ED_MASK, tailp); + size -= temp; + buf += temp; + + list_for_each(entry, &ed->td_list) { + u32 dbp, cbl; + + td = list_entry(entry, struct td, td_list); + info = hc32_to_cpup(ahcd, &td->hwINFO); + dbp = hc32_to_cpup(ahcd, &td->hwDBP); + cbl = hc32_to_cpup(ahcd, &td->hwCBL); + + temp = scnprintf(buf, size, + "\n\ttd/%p %s %d %s%scc=%x urb %p (%08x,%08x)", + td, + td_pidstring(info), + TD_BL_GET(cbl), + (info & TD_OWN) ? "" : "DONE ", + (cbl & TD_IE) ? "IE " : "", + TD_CC_GET(info), td->urb, info, cbl); + size -= temp; + buf += temp; + } + + temp = scnprintf(buf, size, "\n"); + size -= temp; + buf += temp; + + ed = ed->ed_next; + } + + return count - size; +} + +static ssize_t fill_async_buffer(struct debug_buffer *buf) +{ + struct admhcd *ahcd; + size_t temp; + unsigned long flags; + + ahcd = buf->ahcd; + + spin_lock_irqsave(&ahcd->lock, flags); + temp = show_list(ahcd, buf->page, PAGE_SIZE, ahcd->ed_head); + spin_unlock_irqrestore(&ahcd->lock, flags); + + return temp; +} + + +#define DBG_SCHED_LIMIT 64 + +static ssize_t fill_periodic_buffer(struct debug_buffer *buf) +{ + struct admhcd *ahcd; + struct ed **seen, *ed; + unsigned long flags; + unsigned temp, size, seen_count; + char *next; + unsigned i; + + seen = kmalloc(DBG_SCHED_LIMIT * sizeof(*seen), GFP_ATOMIC); + if (!seen) + return 0; + seen_count = 0; + + ahcd = buf->ahcd; + next = buf->page; + size = PAGE_SIZE; + + temp = scnprintf(next, size, "size = %d\n", NUM_INTS); + size -= temp; + next += temp; + + /* dump a snapshot of the periodic schedule (and load) */ + spin_lock_irqsave(&ahcd->lock, flags); + for (i = 0; i < NUM_INTS; i++) { + ed = ahcd->periodic[i]; + if (!ed) + continue; + + temp = scnprintf(next, size, "%2d [%3d]:", i, ahcd->load[i]); + size -= temp; + next += temp; + + do { + temp = scnprintf(next, size, " ed%d/%p", + ed->interval, ed); + size -= temp; + next += temp; + for (temp = 0; temp < seen_count; temp++) { + if (seen[temp] == ed) + break; + } + + /* show more info the first time around */ + if (temp == seen_count) { + u32 info = hc32_to_cpu(ahcd, ed->hwINFO); + struct list_head *entry; + unsigned qlen = 0; + + /* qlen measured here in TDs, not urbs */ + list_for_each(entry, &ed->td_list) + qlen++; + temp = scnprintf(next, size, + " (%cs dev%d ep%d%s qlen %u" + " max %d %08x%s%s)", + (info & ED_SPEED_FULL) ? 'f' : 'l', + ED_FA_GET(info), + ED_EN_GET(info), + (info & ED_ISO) ? "iso" : "int", + qlen, + ED_MPS_GET(info), + info, + (info & ED_SKIP) ? " K" : "", + (ed->hwHeadP & + cpu_to_hc32(ahcd, ED_H)) ? + " H" : ""); + size -= temp; + next += temp; + + if (seen_count < DBG_SCHED_LIMIT) + seen[seen_count++] = ed; + + ed = ed->ed_next; + + } else { + /* we've seen it and what's after */ + temp = 0; + ed = NULL; + } + + } while (ed); + + temp = scnprintf(next, size, "\n"); + size -= temp; + next += temp; + } + spin_unlock_irqrestore(&ahcd->lock, flags); + kfree(seen); + + return PAGE_SIZE - size; +} + + +#undef DBG_SCHED_LIMIT + +static ssize_t fill_registers_buffer(struct debug_buffer *buf) +{ + struct usb_hcd *hcd; + struct admhcd *ahcd; + struct admhcd_regs __iomem *regs; + unsigned long flags; + unsigned temp, size; + char *next; + u32 rdata; + + ahcd = buf->ahcd; + hcd = admhc_to_hcd(ahcd); + regs = ahcd->regs; + next = buf->page; + size = PAGE_SIZE; + + spin_lock_irqsave(&ahcd->lock, flags); + + /* dump driver info, then registers in spec order */ + + admhc_dbg_sw(ahcd, &next, &size, + "bus %s, device %s\n" + "%s\n" + "%s\n", + hcd->self.controller->bus->name, + dev_name(hcd->self.controller), + hcd->product_desc, + hcd_name); + + if (!HCD_HW_ACCESSIBLE(hcd)) { + size -= scnprintf(next, size, + "SUSPENDED (no register access)\n"); + goto done; + } + + admhc_dump_status(ahcd, &next, &size); + + /* other registers mostly affect frame timings */ + rdata = admhc_readl(ahcd, ®s->fminterval); + temp = scnprintf(next, size, + "fmintvl 0x%08x %sFSLDP=0x%04x FI=0x%04x\n", + rdata, (rdata & ADMHC_SFI_FIT) ? "FIT " : "", + (rdata >> ADMHC_SFI_FSLDP_SHIFT) & ADMHC_SFI_FSLDP_MASK, + rdata & ADMHC_SFI_FI_MASK); + size -= temp; + next += temp; + + rdata = admhc_readl(ahcd, ®s->fmnumber); + temp = scnprintf(next, size, "fmnumber 0x%08x %sFR=0x%04x FN=%04x\n", + rdata, (rdata & ADMHC_SFN_FRT) ? "FRT " : "", + (rdata >> ADMHC_SFN_FR_SHIFT) & ADMHC_SFN_FR_MASK, + rdata & ADMHC_SFN_FN_MASK); + size -= temp; + next += temp; + + /* TODO: use predefined bitmask */ + rdata = admhc_readl(ahcd, ®s->lsthresh); + temp = scnprintf(next, size, "lsthresh 0x%04x\n", + rdata & 0x3fff); + size -= temp; + next += temp; + + temp = scnprintf(next, size, "hub poll timer: %s\n", + admhcd_to_hcd(ahcd)->poll_rh ? "ON" : "OFF"); + size -= temp; + next += temp; + + /* roothub */ + admhc_dump_roothub(ahcd, 1, &next, &size); + +done: + spin_unlock_irqrestore(&ahcd->lock, flags); + return PAGE_SIZE - size; +} + + +static struct debug_buffer *alloc_buffer(struct admhcd *ahcd, + ssize_t (*fill_func)(struct debug_buffer *)) +{ + struct debug_buffer *buf; + + buf = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); + + if (buf) { + buf->ahcd = ahcd; + buf->fill_func = fill_func; + mutex_init(&buf->mutex); + } + + return buf; +} + +static int fill_buffer(struct debug_buffer *buf) +{ + int ret = 0; + + if (!buf->page) + buf->page = (char *)get_zeroed_page(GFP_KERNEL); + + if (!buf->page) { + ret = -ENOMEM; + goto out; + } + + ret = buf->fill_func(buf); + + if (ret >= 0) { + buf->count = ret; + ret = 0; + } + +out: + return ret; +} + +static ssize_t debug_output(struct file *file, char __user *user_buf, + size_t len, loff_t *offset) +{ + struct debug_buffer *buf = file->private_data; + int ret = 0; + + mutex_lock(&buf->mutex); + if (buf->count == 0) { + ret = fill_buffer(buf); + if (ret != 0) { + mutex_unlock(&buf->mutex); + goto out; + } + } + mutex_unlock(&buf->mutex); + + ret = simple_read_from_buffer(user_buf, len, offset, + buf->page, buf->count); + +out: + return ret; +} + +static int debug_close(struct inode *inode, struct file *file) +{ + struct debug_buffer *buf = file->private_data; + + if (buf) { + if (buf->page) + free_page((unsigned long)buf->page); + kfree(buf); + } + + return 0; +} + +static int debug_async_open(struct inode *inode, struct file *file) +{ + file->private_data = alloc_buffer(inode->i_private, fill_async_buffer); + + return file->private_data ? 0 : -ENOMEM; +} + +static int debug_periodic_open(struct inode *inode, struct file *file) +{ + file->private_data = alloc_buffer(inode->i_private, + fill_periodic_buffer); + + return file->private_data ? 0 : -ENOMEM; +} + +static int debug_registers_open(struct inode *inode, struct file *file) +{ + file->private_data = alloc_buffer(inode->i_private, + fill_registers_buffer); + + return file->private_data ? 0 : -ENOMEM; +} + +static inline void create_debug_files(struct admhcd *ahcd) +{ + struct usb_bus *bus = &admhcd_to_hcd(ahcd)->self; + + ahcd->debug_dir = debugfs_create_dir(bus->bus_name, admhc_debug_root); + if (!ahcd->debug_dir) + goto dir_error; + + ahcd->debug_async = debugfs_create_file("async", S_IRUGO, + ahcd->debug_dir, ahcd, + &debug_async_fops); + if (!ahcd->debug_async) + goto async_error; + + ahcd->debug_periodic = debugfs_create_file("periodic", S_IRUGO, + ahcd->debug_dir, ahcd, + &debug_periodic_fops); + if (!ahcd->debug_periodic) + goto periodic_error; + + ahcd->debug_registers = debugfs_create_file("registers", S_IRUGO, + ahcd->debug_dir, ahcd, + &debug_registers_fops); + if (!ahcd->debug_registers) + goto registers_error; + + admhc_dbg(ahcd, "created debug files\n"); + return; + +registers_error: + debugfs_remove(ahcd->debug_periodic); +periodic_error: + debugfs_remove(ahcd->debug_async); +async_error: + debugfs_remove(ahcd->debug_dir); +dir_error: + ahcd->debug_periodic = NULL; + ahcd->debug_async = NULL; + ahcd->debug_dir = NULL; +} + +static inline void remove_debug_files(struct admhcd *ahcd) +{ + debugfs_remove(ahcd->debug_registers); + debugfs_remove(ahcd->debug_periodic); + debugfs_remove(ahcd->debug_async); + debugfs_remove(ahcd->debug_dir); +} + +#endif + +/*-------------------------------------------------------------------------*/ diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-drv.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-drv.c new file mode 100644 index 0000000..798fd22 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-drv.c @@ -0,0 +1,228 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-au1xxx.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * (C) Copyright 2002 Hewlett-Packard Company + * + * Written by Christopher Hoover <ch@hpl.hp.com> + * Based on fragments of previous driver by Russell King et al. + * + * Modified for LH7A404 from ahcd-sa1111.c + * by Durgesh Pattamatta <pattamattad@sharpsec.com> + * Modified for AMD Alchemy Au1xxx + * by Matt Porter <mporter@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/platform_device.h> +#include <linux/signal.h> + +#include <asm/bootinfo.h> +#include <asm/mach-adm5120/adm5120_defs.h> + +#ifdef DEBUG +#define HCD_DBG(f, a...) printk(KERN_DEBUG "%s: " f, hcd_name, ## a) +#else +#define HCD_DBG(f, a...) do {} while (0) +#endif +#define HCD_ERR(f, a...) printk(KERN_ERR "%s: " f, hcd_name, ## a) +#define HCD_INFO(f, a...) printk(KERN_INFO "%s: " f, hcd_name, ## a) + +/*-------------------------------------------------------------------------*/ + +static int admhc_adm5120_probe(const struct hc_driver *driver, + struct platform_device *dev) +{ + int retval; + struct usb_hcd *hcd; + int irq; + struct resource *regs; + + /* sanity checks */ + regs = platform_get_resource(dev, IORESOURCE_MEM, 0); + if (!regs) { + HCD_DBG("no IOMEM resource found\n"); + return -ENODEV; + } + + irq = platform_get_irq(dev, 0); + if (irq < 0) { + HCD_DBG("no IRQ resource found\n"); + return -ENODEV; + } + + hcd = usb_create_hcd(driver, &dev->dev, "ADM5120"); + if (!hcd) + return -ENOMEM; + + hcd->rsrc_start = regs->start; + hcd->rsrc_len = regs->end - regs->start + 1; + + if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) { + HCD_DBG("request_mem_region failed\n"); + retval = -EBUSY; + goto err_dev; + } + + hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len); + if (!hcd->regs) { + HCD_DBG("ioremap failed\n"); + retval = -ENOMEM; + goto err_mem; + } + + admhc_hcd_init(hcd_to_admhcd(hcd)); + + retval = usb_add_hcd(hcd, irq, 0); + if (retval) + goto err_io; + + return 0; + +err_io: + iounmap(hcd->regs); +err_mem: + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); +err_dev: + usb_put_hcd(hcd); + return retval; +} + + +/* may be called without controller electrically present */ +/* may be called with controller, bus, and devices active */ + +static void admhc_adm5120_remove(struct usb_hcd *hcd, + struct platform_device *dev) +{ + usb_remove_hcd(hcd); + iounmap(hcd->regs); + release_mem_region(hcd->rsrc_start, hcd->rsrc_len); + usb_put_hcd(hcd); +} + +static int admhc_adm5120_start(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + int ret; + + ret = admhc_init(ahcd); + if (ret < 0) { + HCD_ERR("unable to init %s\n", hcd->self.bus_name); + goto err; + } + + ret = admhc_run(ahcd); + if (ret < 0) { + HCD_ERR("unable to run %s\n", hcd->self.bus_name); + goto err_stop; + } + + return 0; + +err_stop: + admhc_stop(hcd); +err: + return ret; +} + +static const struct hc_driver adm5120_hc_driver = { + .description = hcd_name, + .product_desc = "ADM5120 built-in USB 1.1 Host Controller", + .hcd_priv_size = sizeof(struct admhcd), + + /* + * generic hardware linkage + */ + .irq = admhc_irq, + .flags = HCD_USB11 | HCD_MEMORY, + + /* + * basic lifecycle operations + */ + .start = admhc_adm5120_start, + .stop = admhc_stop, + .shutdown = admhc_shutdown, + + /* + * managing i/o requests and associated device resources + */ + .urb_enqueue = admhc_urb_enqueue, + .urb_dequeue = admhc_urb_dequeue, + .endpoint_disable = admhc_endpoint_disable, + + /* + * scheduling support + */ + .get_frame_number = admhc_get_frame_number, + + /* + * root hub support + */ + .hub_status_data = admhc_hub_status_data, + .hub_control = admhc_hub_control, +#ifdef CONFIG_PM + .bus_suspend = admhc_bus_suspend, + .bus_resume = admhc_bus_resume, +#endif + .start_port_reset = admhc_start_port_reset, +}; + +static int usb_hcd_adm5120_probe(struct platform_device *pdev) +{ + int ret; + + ret = admhc_adm5120_probe(&adm5120_hc_driver, pdev); + + return ret; +} + +static int usb_hcd_adm5120_remove(struct platform_device *pdev) +{ + struct usb_hcd *hcd = platform_get_drvdata(pdev); + + admhc_adm5120_remove(hcd, pdev); + + return 0; +} + +#ifdef CONFIG_PM +/* TODO */ +static int usb_hcd_adm5120_suspend(struct platform_device *dev) +{ + struct usb_hcd *hcd = platform_get_drvdata(dev); + + return 0; +} + +static int usb_hcd_adm5120_resume(struct platform_device *dev) +{ + struct usb_hcd *hcd = platform_get_drvdata(dev); + + return 0; +} +#else +#define usb_hcd_adm5120_suspend NULL +#define usb_hcd_adm5120_resume NULL +#endif /* CONFIG_PM */ + +static struct platform_driver usb_hcd_adm5120_driver = { + .probe = usb_hcd_adm5120_probe, + .remove = usb_hcd_adm5120_remove, + .shutdown = usb_hcd_platform_shutdown, + .suspend = usb_hcd_adm5120_suspend, + .resume = usb_hcd_adm5120_resume, + .driver = { + .name = "adm5120-hcd", + .owner = THIS_MODULE, + }, +}; + diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hcd.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hcd.c new file mode 100644 index 0000000..f721ec1 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hcd.c @@ -0,0 +1,843 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-hcd.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> + * + * [ Initialisation is based on Linus' ] + * [ uhci code and gregs ahcd fragments ] + * [ (C) Copyright 1999 Linus Torvalds ] + * [ (C) Copyright 1999 Gregory P. Smith] + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/pci.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/errno.h> +#include <linux/init.h> +#include <linux/timer.h> +#include <linux/list.h> +#include <linux/usb.h> +#include <linux/usb/otg.h> +#include <linux/usb/hcd.h> +#include <linux/dma-mapping.h> +#include <linux/dmapool.h> +#include <linux/debugfs.h> +#include <linux/io.h> + +#include <asm/irq.h> +#include <asm/unaligned.h> +#include <asm/byteorder.h> + +#define DRIVER_VERSION "0.27.0" +#define DRIVER_AUTHOR "Gabor Juhos <juhosg@openwrt.org>" +#define DRIVER_DESC "ADMtek USB 1.1 Host Controller Driver" + +/*-------------------------------------------------------------------------*/ + +#undef ADMHC_VERBOSE_DEBUG /* not always helpful */ + +/* For initializing controller (mask in an HCFS mode too) */ +#define OHCI_CONTROL_INIT OHCI_CTRL_CBSR + +#define ADMHC_INTR_INIT \ + (ADMHC_INTR_MIE | ADMHC_INTR_INSM | ADMHC_INTR_FATI \ + | ADMHC_INTR_RESI | ADMHC_INTR_TDC | ADMHC_INTR_BABI) + +/*-------------------------------------------------------------------------*/ + +static const char hcd_name[] = "admhc-hcd"; + +#define STATECHANGE_DELAY msecs_to_jiffies(300) + +#include "adm5120.h" + +static void admhc_dump(struct admhcd *ahcd, int verbose); +static int admhc_init(struct admhcd *ahcd); +static void admhc_stop(struct usb_hcd *hcd); + +#include "adm5120-dbg.c" +#include "adm5120-mem.c" +#include "adm5120-pm.c" +#include "adm5120-hub.c" +#include "adm5120-q.c" + +/*-------------------------------------------------------------------------*/ + +/* + * queue up an urb for anything except the root hub + */ +static int admhc_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, + gfp_t mem_flags) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + struct ed *ed; + struct urb_priv *urb_priv; + unsigned int pipe = urb->pipe; + int td_cnt = 0; + unsigned long flags; + int ret = 0; + +#ifdef ADMHC_VERBOSE_DEBUG + spin_lock_irqsave(&ahcd->lock, flags); + urb_print(ahcd, urb, "ENQEUE", usb_pipein(pipe), -EINPROGRESS); + spin_unlock_irqrestore(&ahcd->lock, flags); +#endif + + /* every endpoint has an ed, locate and maybe (re)initialize it */ + ed = ed_get(ahcd, urb->ep, urb->dev, pipe, urb->interval); + if (!ed) + return -ENOMEM; + + /* for the private part of the URB we need the number of TDs */ + switch (ed->type) { + case PIPE_CONTROL: + if (urb->transfer_buffer_length > TD_DATALEN_MAX) + /* td_submit_urb() doesn't yet handle these */ + return -EMSGSIZE; + + /* 1 TD for setup, 1 for ACK, plus ... */ + td_cnt = 2; + /* FALLTHROUGH */ + case PIPE_BULK: + /* one TD for every 4096 Bytes (can be up to 8K) */ + td_cnt += urb->transfer_buffer_length / TD_DATALEN_MAX; + /* ... and for any remaining bytes ... */ + if ((urb->transfer_buffer_length % TD_DATALEN_MAX) != 0) + td_cnt++; + /* ... and maybe a zero length packet to wrap it up */ + if (td_cnt == 0) + td_cnt++; + else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 + && (urb->transfer_buffer_length + % usb_maxpacket(urb->dev, pipe, + usb_pipeout(pipe))) == 0) + td_cnt++; + break; + case PIPE_INTERRUPT: + /* + * for Interrupt IN/OUT transactions, each ED contains + * only 1 TD. + * TODO: check transfer_buffer_length? + */ + td_cnt = 1; + break; + case PIPE_ISOCHRONOUS: + /* number of packets from URB */ + td_cnt = urb->number_of_packets; + break; + } + + urb_priv = urb_priv_alloc(ahcd, td_cnt, mem_flags); + if (!urb_priv) + return -ENOMEM; + + urb_priv->ed = ed; + + spin_lock_irqsave(&ahcd->lock, flags); + /* don't submit to a dead HC */ + if (!HCD_HW_ACCESSIBLE(hcd)) { + ret = -ENODEV; + goto fail; + } + if (!HC_IS_RUNNING(hcd->state)) { + ret = -ENODEV; + goto fail; + } + + ret = usb_hcd_link_urb_to_ep(hcd, urb); + if (ret) + goto fail; + + /* schedule the ed if needed */ + if (ed->state == ED_IDLE) { + ret = ed_schedule(ahcd, ed); + if (ret < 0) { + usb_hcd_unlink_urb_from_ep(hcd, urb); + goto fail; + } + if (ed->type == PIPE_ISOCHRONOUS) { + u16 frame = admhc_frame_no(ahcd); + + /* delay a few frames before the first TD */ + frame += max_t (u16, 8, ed->interval); + frame &= ~(ed->interval - 1); + frame |= ed->branch; + urb->start_frame = frame; + + /* yes, only URB_ISO_ASAP is supported, and + * urb->start_frame is never used as input. + */ + } + } else if (ed->type == PIPE_ISOCHRONOUS) + urb->start_frame = ed->last_iso + ed->interval; + + /* fill the TDs and link them to the ed; and + * enable that part of the schedule, if needed + * and update count of queued periodic urbs + */ + urb->hcpriv = urb_priv; + td_submit_urb(ahcd, urb); + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "admhc_urb_enqueue", urb_priv->ed, 1); +#endif + +fail: + if (ret) + urb_priv_free(ahcd, urb_priv); + + spin_unlock_irqrestore(&ahcd->lock, flags); + return ret; +} + +/* + * decouple the URB from the HC queues (TDs, urb_priv); + * reporting is always done + * asynchronously, and we might be dealing with an urb that's + * partially transferred, or an ED with other urbs being unlinked. + */ +static int admhc_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, + int status) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + unsigned long flags; + int ret; + + spin_lock_irqsave(&ahcd->lock, flags); + +#ifdef ADMHC_VERBOSE_DEBUG + urb_print(ahcd, urb, "DEQUEUE", 1, status); +#endif + ret = usb_hcd_check_unlink_urb(hcd, urb, status); + if (ret) { + /* Do nothing */ + ; + } else if (HC_IS_RUNNING(hcd->state)) { + struct urb_priv *urb_priv; + + /* Unless an IRQ completed the unlink while it was being + * handed to us, flag it for unlink and giveback, and force + * some upcoming INTR_SF to call finish_unlinks() + */ + urb_priv = urb->hcpriv; + if (urb_priv) { + if (urb_priv->ed->state == ED_OPER) + start_ed_unlink(ahcd, urb_priv->ed); + } + } else { + /* + * with HC dead, we won't respect hc queue pointers + * any more ... just clean up every urb's memory. + */ + if (urb->hcpriv) + finish_urb(ahcd, urb, status); + } + spin_unlock_irqrestore(&ahcd->lock, flags); + + return ret; +} + +/*-------------------------------------------------------------------------*/ + +/* frees config/altsetting state for endpoints, + * including ED memory, dummy TD, and bulk/intr data toggle + */ + +static void admhc_endpoint_disable(struct usb_hcd *hcd, + struct usb_host_endpoint *ep) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + unsigned long flags; + struct ed *ed = ep->hcpriv; + unsigned limit = 1000; + + /* ASSERT: any requests/urbs are being unlinked */ + /* ASSERT: nobody can be submitting urbs for this any more */ + + if (!ed) + return; + +#ifdef ADMHC_VERBOSE_DEBUG + spin_lock_irqsave(&ahcd->lock, flags); + admhc_dump_ed(ahcd, "EP-DISABLE", ed, 1); + spin_unlock_irqrestore(&ahcd->lock, flags); +#endif + +rescan: + spin_lock_irqsave(&ahcd->lock, flags); + + if (!HC_IS_RUNNING(hcd->state)) { +sanitize: + ed->state = ED_IDLE; + finish_unlinks(ahcd, 0); + } + + switch (ed->state) { + case ED_UNLINK: /* wait for hw to finish? */ + /* major IRQ delivery trouble loses INTR_SOFI too... */ + if (limit-- == 0) { + admhc_warn(ahcd, "IRQ INTR_SOFI lossage\n"); + goto sanitize; + } + spin_unlock_irqrestore(&ahcd->lock, flags); + schedule_timeout_uninterruptible(1); + goto rescan; + case ED_IDLE: /* fully unlinked */ + if (list_empty(&ed->td_list)) { + td_free(ahcd, ed->dummy); + ed_free(ahcd, ed); + break; + } + /* else FALL THROUGH */ + default: + /* caller was supposed to have unlinked any requests; + * that's not our job. can't recover; must leak ed. + */ + admhc_err(ahcd, "leak ed %p (#%02x) state %d%s\n", + ed, ep->desc.bEndpointAddress, ed->state, + list_empty(&ed->td_list) ? "" : " (has tds)"); + td_free(ahcd, ed->dummy); + break; + } + + ep->hcpriv = NULL; + + spin_unlock_irqrestore(&ahcd->lock, flags); +} + +static int admhc_get_frame_number(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + + return admhc_frame_no(ahcd); +} + +static void admhc_usb_reset(struct admhcd *ahcd) +{ +#if 0 + ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); + ahcd->hc_control &= OHCI_CTRL_RWC; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->regs->control); +#else + /* FIXME */ + ahcd->host_control = ADMHC_BUSS_RESET; + admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control); +#endif +} + +/* admhc_shutdown forcibly disables IRQs and DMA, helping kexec and + * other cases where the next software may expect clean state from the + * "firmware". this is bus-neutral, unlike shutdown() methods. + */ +static void +admhc_shutdown(struct usb_hcd *hcd) +{ + struct admhcd *ahcd; + + ahcd = hcd_to_admhcd(hcd); + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); + admhc_dma_disable(ahcd); + admhc_usb_reset(ahcd); + /* flush the writes */ + admhc_writel_flush(ahcd); +} + +/*-------------------------------------------------------------------------* + * HC functions + *-------------------------------------------------------------------------*/ + +static void admhc_eds_cleanup(struct admhcd *ahcd) +{ + if (ahcd->ed_tails[PIPE_INTERRUPT]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_INTERRUPT]); + ahcd->ed_tails[PIPE_INTERRUPT] = NULL; + } + + if (ahcd->ed_tails[PIPE_ISOCHRONOUS]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_ISOCHRONOUS]); + ahcd->ed_tails[PIPE_ISOCHRONOUS] = NULL; + } + + if (ahcd->ed_tails[PIPE_CONTROL]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_CONTROL]); + ahcd->ed_tails[PIPE_CONTROL] = NULL; + } + + if (ahcd->ed_tails[PIPE_BULK]) { + ed_free(ahcd, ahcd->ed_tails[PIPE_BULK]); + ahcd->ed_tails[PIPE_BULK] = NULL; + } + + ahcd->ed_head = NULL; +} + +#define ED_DUMMY_INFO (ED_SPEED_FULL | ED_SKIP) + +static int admhc_eds_init(struct admhcd *ahcd) +{ + struct ed *ed; + + ed = ed_create(ahcd, PIPE_INTERRUPT, ED_DUMMY_INFO); + if (!ed) + goto err; + + ahcd->ed_tails[PIPE_INTERRUPT] = ed; + + ed = ed_create(ahcd, PIPE_ISOCHRONOUS, ED_DUMMY_INFO); + if (!ed) + goto err; + + ahcd->ed_tails[PIPE_ISOCHRONOUS] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_INTERRUPT]; + ahcd->ed_tails[PIPE_INTERRUPT]->ed_next = ed; + ahcd->ed_tails[PIPE_INTERRUPT]->hwNextED = cpu_to_hc32(ahcd, ed->dma); + + ed = ed_create(ahcd, PIPE_CONTROL, ED_DUMMY_INFO); + if (!ed) + goto err; + + ahcd->ed_tails[PIPE_CONTROL] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_ISOCHRONOUS]; + ahcd->ed_tails[PIPE_ISOCHRONOUS]->ed_next = ed; + ahcd->ed_tails[PIPE_ISOCHRONOUS]->hwNextED = cpu_to_hc32(ahcd, ed->dma); + + ed = ed_create(ahcd, PIPE_BULK, ED_DUMMY_INFO); + if (!ed) + goto err; + + ahcd->ed_tails[PIPE_BULK] = ed; + ed->ed_prev = ahcd->ed_tails[PIPE_CONTROL]; + ahcd->ed_tails[PIPE_CONTROL]->ed_next = ed; + ahcd->ed_tails[PIPE_CONTROL]->hwNextED = cpu_to_hc32(ahcd, ed->dma); + + ahcd->ed_head = ahcd->ed_tails[PIPE_INTERRUPT]; + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ed intr", ahcd->ed_tails[PIPE_INTERRUPT], 1); + admhc_dump_ed(ahcd, "ed isoc", ahcd->ed_tails[PIPE_ISOCHRONOUS], 1); + admhc_dump_ed(ahcd, "ed ctrl", ahcd->ed_tails[PIPE_CONTROL], 1); + admhc_dump_ed(ahcd, "ed bulk", ahcd->ed_tails[PIPE_BULK], 1); +#endif + + return 0; + +err: + admhc_eds_cleanup(ahcd); + return -ENOMEM; +} + +/* init memory, and kick BIOS/SMM off */ + +static int admhc_init(struct admhcd *ahcd) +{ + struct usb_hcd *hcd = admhcd_to_hcd(ahcd); + int ret; + + admhc_disable(ahcd); + ahcd->regs = hcd->regs; + + /* Disable HC interrupts */ + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); + + /* Read the number of ports unless overridden */ + if (ahcd->num_ports == 0) + ahcd->num_ports = admhc_read_rhdesc(ahcd) & ADMHC_RH_NUMP; + + ret = admhc_mem_init(ahcd); + if (ret) + goto err; + + /* init dummy endpoints */ + ret = admhc_eds_init(ahcd); + if (ret) + goto err; + + create_debug_files(ahcd); + + return 0; + +err: + admhc_stop(hcd); + return ret; +} + +/*-------------------------------------------------------------------------*/ + +/* Start an OHCI controller, set the BUS operational + * resets USB and controller + * enable interrupts + */ +static int admhc_run(struct admhcd *ahcd) +{ + u32 val; + int first = ahcd->fminterval == 0; + struct usb_hcd *hcd = admhcd_to_hcd(ahcd); + + admhc_disable(ahcd); + + /* boot firmware should have set this up (5.1.1.3.1) */ + if (first) { + val = admhc_readl(ahcd, &ahcd->regs->fminterval); + ahcd->fminterval = val & ADMHC_SFI_FI_MASK; + if (ahcd->fminterval != FI) + admhc_dbg(ahcd, "fminterval delta %d\n", + ahcd->fminterval - FI); + ahcd->fminterval |= + (FSLDP(ahcd->fminterval) << ADMHC_SFI_FSLDP_SHIFT); + /* also: power/overcurrent flags in rhdesc */ + } + +#if 0 /* TODO: not applicable */ + /* Reset USB nearly "by the book". RemoteWakeupConnected has + * to be checked in case boot firmware (BIOS/SMM/...) has set up + * wakeup in a way the bus isn't aware of (e.g., legacy PCI PM). + * If the bus glue detected wakeup capability then it should + * already be enabled; if so we'll just enable it again. + */ + if ((ahcd->hc_control & OHCI_CTRL_RWC) != 0) + device_set_wakeup_capable(hcd->self.controller, 1); +#endif + + switch (ahcd->host_control & ADMHC_HC_BUSS) { + case ADMHC_BUSS_OPER: + val = 0; + break; + case ADMHC_BUSS_SUSPEND: + /* FALLTHROUGH ? */ + case ADMHC_BUSS_RESUME: + ahcd->host_control = ADMHC_BUSS_RESUME; + val = 10 /* msec wait */; + break; + /* case ADMHC_BUSS_RESET: */ + default: + ahcd->host_control = ADMHC_BUSS_RESET; + val = 50 /* msec wait */; + break; + } + admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control); + + /* flush the writes */ + admhc_writel_flush(ahcd); + + msleep(val); + val = admhc_read_rhdesc(ahcd); + if (!(val & ADMHC_RH_NPS)) { + /* power down each port */ + for (val = 0; val < ahcd->num_ports; val++) + admhc_write_portstatus(ahcd, val, ADMHC_PS_CPP); + } + /* flush those writes */ + admhc_writel_flush(ahcd); + + /* 2msec timelimit here means no irqs/preempt */ + spin_lock_irq(&ahcd->lock); + + admhc_writel(ahcd, ADMHC_CTRL_SR, &ahcd->regs->gencontrol); + val = 30; /* ... allow extra time */ + while ((admhc_readl(ahcd, &ahcd->regs->gencontrol) & ADMHC_CTRL_SR) != 0) { + if (--val == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "USB HC reset timed out!\n"); + return -1; + } + udelay(1); + } + + /* enable HOST mode, before access any host specific register */ + admhc_writel(ahcd, ADMHC_CTRL_UHFE, &ahcd->regs->gencontrol); + + /* Tell the controller where the descriptor list is */ + admhc_writel(ahcd, (u32)ahcd->ed_head->dma, &ahcd->regs->hosthead); + + periodic_reinit(ahcd); + + /* use rhsc irqs after khubd is fully initialized */ + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + hcd->uses_new_polling = 1; + +#if 0 + /* wake on ConnectStatusChange, matching external hubs */ + admhc_writel(ahcd, RH_HS_DRWE, &ahcd->regs->roothub.status); +#else + /* FIXME roothub_write_status (ahcd, ADMHC_RH_DRWE); */ +#endif + + /* Choose the interrupts we care about now, others later on demand */ + admhc_intr_ack(ahcd, ~0); + admhc_intr_enable(ahcd, ADMHC_INTR_INIT); + + admhc_writel(ahcd, ADMHC_RH_NPS | ADMHC_RH_LPSC, &ahcd->regs->rhdesc); + + /* flush those writes */ + admhc_writel_flush(ahcd); + + /* start controller operations */ + ahcd->host_control = ADMHC_BUSS_OPER; + admhc_writel(ahcd, ahcd->host_control, &ahcd->regs->host_control); + + val = 20; + while ((admhc_readl(ahcd, &ahcd->regs->host_control) + & ADMHC_HC_BUSS) != ADMHC_BUSS_OPER) { + if (--val == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "unable to setup operational mode!\n"); + return -1; + } + mdelay(1); + } + + hcd->state = HC_STATE_RUNNING; + + ahcd->next_statechange = jiffies + STATECHANGE_DELAY; + +#if 0 + /* FIXME: enabling DMA is always failed here for an unknown reason */ + admhc_dma_enable(ahcd); + + val = 200; + while ((admhc_readl(ahcd, &ahcd->regs->host_control) + & ADMHC_HC_DMAE) != ADMHC_HC_DMAE) { + if (--val == 0) { + spin_unlock_irq(&ahcd->lock); + admhc_err(ahcd, "unable to enable DMA!\n"); + admhc_dump(ahcd, 1); + return -1; + } + mdelay(1); + } + +#endif + + spin_unlock_irq(&ahcd->lock); + + mdelay(ADMHC_POTPGT); + + return 0; +} + +/*-------------------------------------------------------------------------*/ + +/* an interrupt happens */ + +static irqreturn_t admhc_irq(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + struct admhcd_regs __iomem *regs = ahcd->regs; + u32 ints; + + ints = admhc_readl(ahcd, ®s->int_status); + if ((ints & ADMHC_INTR_INTA) == 0) { + /* no unmasked interrupt status is set */ + return IRQ_NONE; + } + + ints &= admhc_readl(ahcd, ®s->int_enable); + + if (ints & ADMHC_INTR_FATI) { + /* e.g. due to PCI Master/Target Abort */ + admhc_disable(ahcd); + admhc_err(ahcd, "Fatal Error, controller disabled\n"); + admhc_dump(ahcd, 1); + admhc_usb_reset(ahcd); + } + + if (ints & ADMHC_INTR_BABI) { + admhc_intr_disable(ahcd, ADMHC_INTR_BABI); + admhc_intr_ack(ahcd, ADMHC_INTR_BABI); + admhc_err(ahcd, "Babble Detected\n"); + } + + if (ints & ADMHC_INTR_INSM) { + admhc_vdbg(ahcd, "Root Hub Status Change\n"); + ahcd->next_statechange = jiffies + STATECHANGE_DELAY; + admhc_intr_ack(ahcd, ADMHC_INTR_RESI | ADMHC_INTR_INSM); + + /* NOTE: Vendors didn't always make the same implementation + * choices for RHSC. Many followed the spec; RHSC triggers + * on an edge, like setting and maybe clearing a port status + * change bit. With others it's level-triggered, active + * until khubd clears all the port status change bits. We'll + * always disable it here and rely on polling until khubd + * re-enables it. + */ + admhc_intr_disable(ahcd, ADMHC_INTR_INSM); + usb_hcd_poll_rh_status(hcd); + } else if (ints & ADMHC_INTR_RESI) { + /* For connect and disconnect events, we expect the controller + * to turn on RHSC along with RD. But for remote wakeup events + * this might not happen. + */ + admhc_vdbg(ahcd, "Resume Detect\n"); + admhc_intr_ack(ahcd, ADMHC_INTR_RESI); + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + if (ahcd->autostop) { + spin_lock(&ahcd->lock); + admhc_rh_resume(ahcd); + spin_unlock(&ahcd->lock); + } else + usb_hcd_resume_root_hub(hcd); + } + + if (ints & ADMHC_INTR_TDC) { + admhc_vdbg(ahcd, "Transfer Descriptor Complete\n"); + admhc_intr_ack(ahcd, ADMHC_INTR_TDC); + if (HC_IS_RUNNING(hcd->state)) + admhc_intr_disable(ahcd, ADMHC_INTR_TDC); + spin_lock(&ahcd->lock); + admhc_td_complete(ahcd); + spin_unlock(&ahcd->lock); + if (HC_IS_RUNNING(hcd->state)) + admhc_intr_enable(ahcd, ADMHC_INTR_TDC); + } + + if (ints & ADMHC_INTR_SO) { + /* could track INTR_SO to reduce available PCI/... bandwidth */ + admhc_vdbg(ahcd, "Schedule Overrun\n"); + } + +#if 1 + spin_lock(&ahcd->lock); + if (ahcd->ed_rm_list) + finish_unlinks(ahcd, admhc_frame_no(ahcd)); + + if ((ints & ADMHC_INTR_SOFI) != 0 && !ahcd->ed_rm_list + && HC_IS_RUNNING(hcd->state)) + admhc_intr_disable(ahcd, ADMHC_INTR_SOFI); + spin_unlock(&ahcd->lock); +#else + if (ints & ADMHC_INTR_SOFI) { + admhc_vdbg(ahcd, "Start Of Frame\n"); + spin_lock(&ahcd->lock); + + /* handle any pending ED removes */ + finish_unlinks(ahcd, admhc_frameno(ahcd)); + + /* leaving INTR_SOFI enabled when there's still unlinking + * to be done in the (next frame). + */ + if ((ahcd->ed_rm_list == NULL) || + HC_IS_RUNNING(hcd->state) == 0) + /* + * disable INTR_SOFI if there are no unlinking to be + * done (in the next frame) + */ + admhc_intr_disable(ahcd, ADMHC_INTR_SOFI); + + spin_unlock(&ahcd->lock); + } +#endif + + if (HC_IS_RUNNING(hcd->state)) { + admhc_intr_ack(ahcd, ints); + admhc_intr_enable(ahcd, ADMHC_INTR_MIE); + admhc_writel_flush(ahcd); + } + + return IRQ_HANDLED; +} + +/*-------------------------------------------------------------------------*/ + +static void admhc_stop(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + + admhc_dump(ahcd, 1); + + flush_scheduled_work(); + + admhc_usb_reset(ahcd); + admhc_intr_disable(ahcd, ADMHC_INTR_MIE); + + free_irq(hcd->irq, hcd); + hcd->irq = -1; + + remove_debug_files(ahcd); + admhc_eds_cleanup(ahcd); + admhc_mem_cleanup(ahcd); +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_ADM5120 +#include "adm5120-drv.c" +#define PLATFORM_DRIVER usb_hcd_adm5120_driver +#endif + +#if !defined(PLATFORM_DRIVER) +#error "missing bus glue for admhc-hcd" +#endif + +#define DRIVER_INFO DRIVER_DESC " version " DRIVER_VERSION + +static int __init admhc_hcd_mod_init(void) +{ + int ret = 0; + + if (usb_disabled()) + return -ENODEV; + + pr_info("%s: " DRIVER_INFO "\n", hcd_name); + pr_info("%s: block sizes: ed %Zd td %Zd\n", hcd_name, + sizeof(struct ed), sizeof(struct td)); + set_bit(USB_OHCI_LOADED, &usb_hcds_loaded); + +#ifdef DEBUG + admhc_debug_root = debugfs_create_dir("admhc", usb_debug_root); + if (!admhc_debug_root) { + ret = -ENOENT; + goto error_debug; + } +#endif + +#ifdef PLATFORM_DRIVER + ret = platform_driver_register(&PLATFORM_DRIVER); + if (ret < 0) + goto error_platform; +#endif + + return ret; + +#ifdef PLATFORM_DRIVER + platform_driver_unregister(&PLATFORM_DRIVER); +error_platform: +#endif + +#ifdef DEBUG + debugfs_remove(admhc_debug_root); + admhc_debug_root = NULL; +error_debug: +#endif + clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); + return ret; +} +module_init(admhc_hcd_mod_init); + +static void __exit admhc_hcd_mod_exit(void) +{ + platform_driver_unregister(&PLATFORM_DRIVER); +#ifdef DEBUG + debugfs_remove(admhc_debug_root); +#endif + clear_bit(USB_OHCI_LOADED, &usb_hcds_loaded); +} +module_exit(admhc_hcd_mod_exit); + +MODULE_AUTHOR(DRIVER_AUTHOR); +MODULE_DESCRIPTION(DRIVER_INFO); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL v2"); diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c new file mode 100644 index 0000000..8cabaf9 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-hub.c @@ -0,0 +1,430 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-hub.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +/*-------------------------------------------------------------------------*/ + +/* + * ADM5120 Root Hub ... the nonsharable stuff + */ + +#define dbg_port(hc, label, num, value) \ + admhc_dbg(hc, \ + "%s port%d " \ + "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ + label, num, value, \ + (value & ADMHC_PS_PRSC) ? " PRSC" : "", \ + (value & ADMHC_PS_OCIC) ? " OCIC" : "", \ + (value & ADMHC_PS_PSSC) ? " PSSC" : "", \ + (value & ADMHC_PS_PESC) ? " PESC" : "", \ + (value & ADMHC_PS_CSC) ? " CSC" : "", \ + \ + (value & ADMHC_PS_LSDA) ? " LSDA" : "", \ + (value & ADMHC_PS_PPS) ? " PPS" : "", \ + (value & ADMHC_PS_PRS) ? " PRS" : "", \ + (value & ADMHC_PS_POCI) ? " POCI" : "", \ + (value & ADMHC_PS_PSS) ? " PSS" : "", \ + \ + (value & ADMHC_PS_PES) ? " PES" : "", \ + (value & ADMHC_PS_CCS) ? " CCS" : "" \ + ); + +#define dbg_port_write(hc, label, num, value) \ + admhc_dbg(hc, \ + "%s port%d " \ + "= 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s\n", \ + label, num, value, \ + (value & ADMHC_PS_PRSC) ? " PRSC" : "", \ + (value & ADMHC_PS_OCIC) ? " OCIC" : "", \ + (value & ADMHC_PS_PSSC) ? " PSSC" : "", \ + (value & ADMHC_PS_PESC) ? " PESC" : "", \ + (value & ADMHC_PS_CSC) ? " CSC" : "", \ + \ + (value & ADMHC_PS_CPP) ? " CPP" : "", \ + (value & ADMHC_PS_SPP) ? " SPP" : "", \ + (value & ADMHC_PS_SPR) ? " SPR" : "", \ + (value & ADMHC_PS_CPS) ? " CPS" : "", \ + (value & ADMHC_PS_SPS) ? " SPS" : "", \ + \ + (value & ADMHC_PS_SPE) ? " SPE" : "", \ + (value & ADMHC_PS_CPE) ? " CPE" : "" \ + ); + +/*-------------------------------------------------------------------------*/ + +/* build "status change" packet (one or two bytes) from HC registers */ + +static int +admhc_hub_status_data(struct usb_hcd *hcd, char *buf) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + int i, changed = 0, length = 1; + int any_connected = 0; + unsigned long flags; + u32 status; + + spin_lock_irqsave(&ahcd->lock, flags); + if (!HCD_HW_ACCESSIBLE(hcd)) + goto done; + + /* init status */ + status = admhc_read_rhdesc(ahcd); + if (status & (ADMHC_RH_LPSC | ADMHC_RH_OCIC)) + buf[0] = changed = 1; + else + buf[0] = 0; + if (ahcd->num_ports > 7) { + buf[1] = 0; + length++; + } + + /* look at each port */ + for (i = 0; i < ahcd->num_ports; i++) { + status = admhc_read_portstatus(ahcd, i); + + /* can't autostop if ports are connected */ + any_connected |= (status & ADMHC_PS_CCS); + + if (status & (ADMHC_PS_CSC | ADMHC_PS_PESC | ADMHC_PS_PSSC + | ADMHC_PS_OCIC | ADMHC_PS_PRSC)) { + changed = 1; + if (i < 7) + buf[0] |= 1 << (i + 1); + else + buf[1] |= 1 << (i - 7); + } + } + + if (admhc_root_hub_state_changes(ahcd, changed, + any_connected)) + set_bit(HCD_FLAG_POLL_RH, &hcd->flags); + else + clear_bit(HCD_FLAG_POLL_RH, &hcd->flags); + +done: + spin_unlock_irqrestore(&ahcd->lock, flags); + + return changed ? length : 0; +} + +/*-------------------------------------------------------------------------*/ + +static int admhc_get_hub_descriptor(struct admhcd *ahcd, char *buf) +{ + struct usb_hub_descriptor *desc = (struct usb_hub_descriptor *)buf; + u32 rh = admhc_read_rhdesc(ahcd); + u16 temp; + + desc->bDescriptorType = USB_DT_HUB; /* Hub-descriptor */ + desc->bPwrOn2PwrGood = ADMHC_POTPGT/2; /* use default value */ + desc->bHubContrCurrent = 0x00; /* 0mA */ + + desc->bNbrPorts = ahcd->num_ports; + temp = 1 + (ahcd->num_ports / 8); + desc->bDescLength = USB_DT_HUB_NONVAR_SIZE + 2 * temp; + + /* FIXME */ + temp = 0; + if (rh & ADMHC_RH_NPS) /* no power switching? */ + temp |= 0x0002; + if (rh & ADMHC_RH_PSM) /* per-port power switching? */ + temp |= 0x0001; + if (rh & ADMHC_RH_NOCP) /* no overcurrent reporting? */ + temp |= 0x0010; + else if (rh & ADMHC_RH_OCPM) /* per-port overcurrent reporting? */ + temp |= 0x0008; + desc->wHubCharacteristics = (__force __u16)cpu_to_hc16(ahcd, temp); + + /* ports removable, and usb 1.0 legacy PortPwrCtrlMask */ + desc->u.hs.DeviceRemovable[0] = 0; + desc->u.hs.DeviceRemovable[0] = ~0; + + return 0; +} + +static int admhc_get_hub_status(struct admhcd *ahcd, char *buf) +{ + struct usb_hub_status *hs = (struct usb_hub_status *)buf; + u32 t = admhc_read_rhdesc(ahcd); + u16 status, change; + + status = 0; + status |= (t & ADMHC_RH_LPS) ? HUB_STATUS_LOCAL_POWER : 0; + status |= (t & ADMHC_RH_OCI) ? HUB_STATUS_OVERCURRENT : 0; + + change = 0; + change |= (t & ADMHC_RH_LPSC) ? HUB_CHANGE_LOCAL_POWER : 0; + change |= (t & ADMHC_RH_OCIC) ? HUB_CHANGE_OVERCURRENT : 0; + + hs->wHubStatus = (__force __u16)cpu_to_hc16(ahcd, status); + hs->wHubChange = (__force __u16)cpu_to_hc16(ahcd, change); + + return 0; +} + +static int admhc_get_port_status(struct admhcd *ahcd, unsigned port, char *buf) +{ + struct usb_port_status *ps = (struct usb_port_status *)buf; + u32 t = admhc_read_portstatus(ahcd, port); + u16 status, change; + + status = 0; + status |= (t & ADMHC_PS_CCS) ? USB_PORT_STAT_CONNECTION : 0; + status |= (t & ADMHC_PS_PES) ? USB_PORT_STAT_ENABLE : 0; + status |= (t & ADMHC_PS_PSS) ? USB_PORT_STAT_SUSPEND : 0; + status |= (t & ADMHC_PS_POCI) ? USB_PORT_STAT_OVERCURRENT : 0; + status |= (t & ADMHC_PS_PRS) ? USB_PORT_STAT_RESET : 0; + status |= (t & ADMHC_PS_PPS) ? USB_PORT_STAT_POWER : 0; + status |= (t & ADMHC_PS_LSDA) ? USB_PORT_STAT_LOW_SPEED : 0; + + change = 0; + change |= (t & ADMHC_PS_CSC) ? USB_PORT_STAT_C_CONNECTION : 0; + change |= (t & ADMHC_PS_PESC) ? USB_PORT_STAT_C_ENABLE : 0; + change |= (t & ADMHC_PS_PSSC) ? USB_PORT_STAT_C_SUSPEND : 0; + change |= (t & ADMHC_PS_OCIC) ? USB_PORT_STAT_C_OVERCURRENT : 0; + change |= (t & ADMHC_PS_PRSC) ? USB_PORT_STAT_C_RESET : 0; + + ps->wPortStatus = (__force __u16)cpu_to_hc16(ahcd, status); + ps->wPortChange = (__force __u16)cpu_to_hc16(ahcd, change); + + return 0; +} + +/*-------------------------------------------------------------------------*/ + +#ifdef CONFIG_USB_OTG + +static int admhc_start_port_reset(struct usb_hcd *hcd, unsigned port) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + u32 status; + + if (!port) + return -EINVAL; + port--; + + /* start port reset before HNP protocol times out */ + status = admhc_read_portstatus(ahcd, port); + if (!(status & ADMHC_PS_CCS)) + return -ENODEV; + + /* khubd will finish the reset later */ + admhc_write_portstatus(ahcd, port, ADMHC_PS_PRS); + return 0; +} + +static void start_hnp(struct admhcd *ahcd); + +#else + +#define admhc_start_port_reset NULL + +#endif + +/*-------------------------------------------------------------------------*/ + + +/* See usb 7.1.7.5: root hubs must issue at least 50 msec reset signaling, + * not necessarily continuous ... to guard against resume signaling. + * The short timeout is safe for non-root hubs, and is backward-compatible + * with earlier Linux hosts. + */ +#ifdef CONFIG_USB_SUSPEND +#define PORT_RESET_MSEC 50 +#else +#define PORT_RESET_MSEC 10 +#endif + +/* this timer value might be vendor-specific ... */ +#define PORT_RESET_HW_MSEC 10 + +/* wrap-aware logic morphed from <linux/jiffies.h> */ +#define tick_before(t1, t2) ((s16)(((s16)(t1)) - ((s16)(t2))) < 0) + +/* called from some task, normally khubd */ +static inline int admhc_port_reset(struct admhcd *ahcd, unsigned port) +{ + u32 t; + + admhc_vdbg(ahcd, "reset port%d\n", port); + t = admhc_read_portstatus(ahcd, port); + if (!(t & ADMHC_PS_CCS)) + return -ENODEV; + + admhc_write_portstatus(ahcd, port, ADMHC_PS_SPR); + mdelay(10); + admhc_write_portstatus(ahcd, port, (ADMHC_PS_SPE | ADMHC_PS_CSC)); + mdelay(100); + + return 0; +} + +static inline int admhc_port_enable(struct admhcd *ahcd, unsigned port) +{ + u32 t; + + admhc_vdbg(ahcd, "enable port%d\n", port); + t = admhc_read_portstatus(ahcd, port); + if (!(t & ADMHC_PS_CCS)) + return -ENODEV; + + admhc_write_portstatus(ahcd, port, ADMHC_PS_SPE); + + return 0; +} + +static inline int admhc_port_disable(struct admhcd *ahcd, unsigned port) +{ + u32 t; + + admhc_vdbg(ahcd, "disable port%d\n", port); + t = admhc_read_portstatus(ahcd, port); + if (!(t & ADMHC_PS_CCS)) + return -ENODEV; + + admhc_write_portstatus(ahcd, port, ADMHC_PS_CPE); + + return 0; +} + +static inline int admhc_port_write(struct admhcd *ahcd, unsigned port, + u32 val) +{ +#ifdef ADMHC_VERBOSE_DEBUG + dbg_port_write(ahcd, "write", port, val); +#endif + admhc_write_portstatus(ahcd, port, val); + + return 0; +} + +static int admhc_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, + u16 wIndex, char *buf, u16 wLength) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + int ports = ahcd->num_ports; + int ret = 0; + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + return -ESHUTDOWN; + + switch (typeReq) { + case ClearHubFeature: + switch (wValue) { + case C_HUB_OVER_CURRENT: +#if 0 /* FIXME */ + admhc_writel(ahcd, ADMHC_RH_OCIC, + &ahcd->regs->roothub.status); +#endif + case C_HUB_LOCAL_POWER: + break; + default: + goto error; + } + break; + case ClearPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + ret = admhc_port_disable(ahcd, wIndex); + break; + case USB_PORT_FEAT_SUSPEND: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPS); + break; + case USB_PORT_FEAT_POWER: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CPP); + break; + case USB_PORT_FEAT_C_CONNECTION: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_CSC); + break; + case USB_PORT_FEAT_C_ENABLE: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PESC); + break; + case USB_PORT_FEAT_C_SUSPEND: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PSSC); + break; + case USB_PORT_FEAT_C_OVER_CURRENT: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_OCIC); + break; + case USB_PORT_FEAT_C_RESET: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_PRSC); + break; + default: + goto error; + } + break; + case GetHubDescriptor: + ret = admhc_get_hub_descriptor(ahcd, buf); + break; + case GetHubStatus: + ret = admhc_get_hub_status(ahcd, buf); + break; + case GetPortStatus: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + + ret = admhc_get_port_status(ahcd, wIndex, buf); + break; + case SetHubFeature: + switch (wValue) { + case C_HUB_OVER_CURRENT: + /* FIXME: this can be cleared, yes? */ + case C_HUB_LOCAL_POWER: + break; + default: + goto error; + } + break; + case SetPortFeature: + if (!wIndex || wIndex > ports) + goto error; + wIndex--; + + switch (wValue) { + case USB_PORT_FEAT_ENABLE: + ret = admhc_port_enable(ahcd, wIndex); + break; + case USB_PORT_FEAT_RESET: + ret = admhc_port_reset(ahcd, wIndex); + break; + case USB_PORT_FEAT_SUSPEND: +#ifdef CONFIG_USB_OTG + if (hcd->self.otg_port == (wIndex + 1) + && hcd->self.b_hnp_enable) + start_hnp(ahcd); + else +#endif + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPS); + break; + case USB_PORT_FEAT_POWER: + ret = admhc_port_write(ahcd, wIndex, ADMHC_PS_SPP); + break; + default: + goto error; + } + break; + + default: +error: + /* "protocol stall" on error */ + ret = -EPIPE; + } + + return ret; +} + diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-mem.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-mem.c new file mode 100644 index 0000000..79fff70 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-mem.c @@ -0,0 +1,202 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-mem.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +/*-------------------------------------------------------------------------*/ + +/* + * OHCI deals with three types of memory: + * - data used only by the HCD ... kmalloc is fine + * - async and periodic schedules, shared by HC and HCD ... these + * need to use dma_pool or dma_alloc_coherent + * - driver buffers, read/written by HC ... the hcd glue or the + * device driver provides us with dma addresses + * + * There's also "register" data, which is memory mapped. + * No memory seen by this driver (or any HCD) may be paged out. + */ + +/*-------------------------------------------------------------------------*/ + +static void admhc_hcd_init(struct admhcd *ahcd) +{ + ahcd->next_statechange = jiffies; + spin_lock_init(&ahcd->lock); + INIT_LIST_HEAD(&ahcd->pending); +} + +/*-------------------------------------------------------------------------*/ + +static int admhc_mem_init(struct admhcd *ahcd) +{ + ahcd->td_cache = dma_pool_create("admhc_td", + admhcd_to_hcd(ahcd)->self.controller, + sizeof(struct td), + TD_ALIGN, /* byte alignment */ + 0 /* no page-crossing issues */ + ); + if (!ahcd->td_cache) + goto err; + + ahcd->ed_cache = dma_pool_create("admhc_ed", + admhcd_to_hcd(ahcd)->self.controller, + sizeof(struct ed), + ED_ALIGN, /* byte alignment */ + 0 /* no page-crossing issues */ + ); + if (!ahcd->ed_cache) + goto err_td_cache; + + return 0; + +err_td_cache: + dma_pool_destroy(ahcd->td_cache); + ahcd->td_cache = NULL; +err: + return -ENOMEM; +} + +static void admhc_mem_cleanup(struct admhcd *ahcd) +{ + if (ahcd->td_cache) { + dma_pool_destroy(ahcd->td_cache); + ahcd->td_cache = NULL; + } + + if (ahcd->ed_cache) { + dma_pool_destroy(ahcd->ed_cache); + ahcd->ed_cache = NULL; + } +} + +/*-------------------------------------------------------------------------*/ + +/* ahcd "done list" processing needs this mapping */ +static inline struct td *dma_to_td(struct admhcd *ahcd, dma_addr_t td_dma) +{ + struct td *td; + + td_dma &= TD_MASK; + td = ahcd->td_hash[TD_HASH_FUNC(td_dma)]; + while (td && td->td_dma != td_dma) + td = td->td_hash; + + return td; +} + +/* TDs ... */ +static struct td *td_alloc(struct admhcd *ahcd, gfp_t mem_flags) +{ + dma_addr_t dma; + struct td *td; + + td = dma_pool_alloc(ahcd->td_cache, mem_flags, &dma); + if (!td) + return NULL; + + /* in case ahcd fetches it, make it look dead */ + memset(td, 0, sizeof *td); + td->hwNextTD = cpu_to_hc32(ahcd, dma); + td->td_dma = dma; + /* hashed in td_fill */ + + return td; +} + +static void td_free(struct admhcd *ahcd, struct td *td) +{ + struct td **prev = &ahcd->td_hash[TD_HASH_FUNC(td->td_dma)]; + + while (*prev && *prev != td) + prev = &(*prev)->td_hash; + if (*prev) + *prev = td->td_hash; +#if 0 + /* TODO: remove */ + else if ((td->hwINFO & cpu_to_hc32(ahcd, TD_DONE)) != 0) + admhc_dbg(ahcd, "no hash for td %p\n", td); +#else + else if ((td->flags & TD_FLAG_DONE) != 0) + admhc_dbg(ahcd, "no hash for td %p\n", td); +#endif + dma_pool_free(ahcd->td_cache, td, td->td_dma); +} + +/*-------------------------------------------------------------------------*/ + +/* EDs ... */ +static struct ed *ed_alloc(struct admhcd *ahcd, gfp_t mem_flags) +{ + dma_addr_t dma; + struct ed *ed; + + ed = dma_pool_alloc(ahcd->ed_cache, mem_flags, &dma); + if (!ed) + return NULL; + + memset(ed, 0, sizeof(*ed)); + ed->dma = dma; + + INIT_LIST_HEAD(&ed->td_list); + INIT_LIST_HEAD(&ed->urb_list); + + return ed; +} + +static void ed_free(struct admhcd *ahcd, struct ed *ed) +{ + dma_pool_free(ahcd->ed_cache, ed, ed->dma); +} + +/*-------------------------------------------------------------------------*/ + +/* URB priv ... */ +static void urb_priv_free(struct admhcd *ahcd, struct urb_priv *urb_priv) +{ + int i; + + for (i = 0; i < urb_priv->td_cnt; i++) + if (urb_priv->td[i]) + td_free(ahcd, urb_priv->td[i]); + + list_del(&urb_priv->pending); + kfree(urb_priv); +} + +static struct urb_priv *urb_priv_alloc(struct admhcd *ahcd, int num_tds, + gfp_t mem_flags) +{ + struct urb_priv *priv; + + /* allocate the private part of the URB */ + priv = kzalloc(sizeof(*priv) + sizeof(struct td) * num_tds, mem_flags); + if (!priv) + goto err; + + /* allocate the TDs (deferring hash chain updates) */ + for (priv->td_cnt = 0; priv->td_cnt < num_tds; priv->td_cnt++) { + priv->td[priv->td_cnt] = td_alloc(ahcd, mem_flags); + if (priv->td[priv->td_cnt] == NULL) + goto err_free; + } + + INIT_LIST_HEAD(&priv->pending); + + return priv; + +err_free: + urb_priv_free(ahcd, priv); +err: + return NULL; +} diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-pm.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-pm.c new file mode 100644 index 0000000..7d7fc24 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-pm.c @@ -0,0 +1,449 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from fragments of the OHCI driver. + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2004 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#define OHCI_SCHED_ENABLES \ + (OHCI_CTRL_CLE|OHCI_CTRL_BLE|OHCI_CTRL_PLE|OHCI_CTRL_IE) + +#ifdef CONFIG_PM +static int admhc_restart(struct admhcd *ahcd); + +static int admhc_rh_suspend(struct admhcd *ahcd, int autostop) +__releases(ahcd->lock) +__acquires(ahcd->lock) +{ + int status = 0; + + ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); + switch (ahcd->hc_control & OHCI_CTRL_HCFS) { + case OHCI_USB_RESUME: + admhc_dbg(ahcd, "resume/suspend?\n"); + ahcd->hc_control &= ~OHCI_CTRL_HCFS; + ahcd->hc_control |= OHCI_USB_RESET; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); + (void) admhc_readl(ahcd, &ahcd->regs->control); + /* FALL THROUGH */ + case OHCI_USB_RESET: + status = -EBUSY; + admhc_dbg(ahcd, "needs reinit!\n"); + goto done; + case OHCI_USB_SUSPEND: + if (!ahcd->autostop) { + admhc_dbg(ahcd, "already suspended\n"); + goto done; + } + } + admhc_dbg(ahcd, "%s root hub\n", + autostop ? "auto-stop" : "suspend"); + + /* First stop any processing */ + if (!autostop && (ahcd->hc_control & OHCI_SCHED_ENABLES)) { + ahcd->hc_control &= ~OHCI_SCHED_ENABLES; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); + ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); + admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->intrstatus); + + /* sched disables take effect on the next frame, + * then the last WDH could take 6+ msec + */ + admhc_dbg(ahcd, "stopping schedules ...\n"); + ahcd->autostop = 0; + spin_unlock_irq (&ahcd->lock); + msleep (8); + spin_lock_irq(&ahcd->lock); + } + dl_done_list (ahcd); + finish_unlinks (ahcd, admhc_frame_no(ahcd)); + + /* maybe resume can wake root hub */ + if (device_may_wakeup(&admhcd_to_hcd(ahcd)->self.root_hub->dev) || + autostop) + ahcd->hc_control |= OHCI_CTRL_RWE; + else { + admhc_writel(ahcd, OHCI_INTR_RHSC, &ahcd->regs->intrdisable); + ahcd->hc_control &= ~OHCI_CTRL_RWE; + } + + /* Suspend hub ... this is the "global (to this bus) suspend" mode, + * which doesn't imply ports will first be individually suspended. + */ + ahcd->hc_control &= ~OHCI_CTRL_HCFS; + ahcd->hc_control |= OHCI_USB_SUSPEND; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); + (void) admhc_readl(ahcd, &ahcd->regs->control); + + /* no resumes until devices finish suspending */ + if (!autostop) { + ahcd->next_statechange = jiffies + msecs_to_jiffies (5); + ahcd->autostop = 0; + } + +done: + return status; +} + +static inline struct ed *find_head(struct ed *ed) +{ + /* for bulk and control lists */ + while (ed->ed_prev) + ed = ed->ed_prev; + return ed; +} + +/* caller has locked the root hub */ +static int admhc_rh_resume(struct admhcd *ahcd) +__releases(ahcd->lock) +__acquires(ahcd->lock) +{ + struct usb_hcd *hcd = admhcd_to_hcd (ahcd); + u32 temp, enables; + int status = -EINPROGRESS; + int autostopped = ahcd->autostop; + + ahcd->autostop = 0; + ahcd->hc_control = admhc_readl(ahcd, &ahcd->regs->control); + + if (ahcd->hc_control & (OHCI_CTRL_IR | OHCI_SCHED_ENABLES)) { + /* this can happen after resuming a swsusp snapshot */ + if (hcd->state == HC_STATE_RESUMING) { + admhc_dbg(ahcd, "BIOS/SMM active, control %03x\n", + ahcd->hc_control); + status = -EBUSY; + /* this happens when pmcore resumes HC then root */ + } else { + admhc_dbg(ahcd, "duplicate resume\n"); + status = 0; + } + } else switch (ahcd->hc_control & OHCI_CTRL_HCFS) { + case OHCI_USB_SUSPEND: + ahcd->hc_control &= ~(OHCI_CTRL_HCFS|OHCI_SCHED_ENABLES); + ahcd->hc_control |= OHCI_USB_RESUME; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); + (void) admhc_readl(ahcd, &ahcd->regs->control); + admhc_dbg(ahcd, "%s root hub\n", + autostopped ? "auto-start" : "resume"); + break; + case OHCI_USB_RESUME: + /* HCFS changes sometime after INTR_RD */ + admhc_dbg(ahcd, "%swakeup root hub\n", + autostopped ? "auto-" : ""); + break; + case OHCI_USB_OPER: + /* this can happen after resuming a swsusp snapshot */ + admhc_dbg(ahcd, "snapshot resume? reinit\n"); + status = -EBUSY; + break; + default: /* RESET, we lost power */ + admhc_dbg(ahcd, "lost power\n"); + status = -EBUSY; + } + if (status == -EBUSY) { + if (!autostopped) { + spin_unlock_irq (&ahcd->lock); + (void) ahcd_init (ahcd); + status = admhc_restart (ahcd); + spin_lock_irq(&ahcd->lock); + } + return status; + } + if (status != -EINPROGRESS) + return status; + if (autostopped) + goto skip_resume; + spin_unlock_irq (&ahcd->lock); + + /* Some controllers (lucent erratum) need extra-long delays */ + msleep (20 /* usb 11.5.1.10 */ + 12 /* 32 msec counter */ + 1); + + temp = admhc_readl(ahcd, &ahcd->regs->control); + temp &= OHCI_CTRL_HCFS; + if (temp != OHCI_USB_RESUME) { + admhc_err (ahcd, "controller won't resume\n"); + spin_lock_irq(&ahcd->lock); + return -EBUSY; + } + + /* disable old schedule state, reinit from scratch */ + admhc_writel(ahcd, 0, &ahcd->regs->ed_controlhead); + admhc_writel(ahcd, 0, &ahcd->regs->ed_controlcurrent); + admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkhead); + admhc_writel(ahcd, 0, &ahcd->regs->ed_bulkcurrent); + admhc_writel(ahcd, 0, &ahcd->regs->ed_periodcurrent); + admhc_writel(ahcd, (u32) ahcd->hcca_dma, &ahcd->ahcd->regs->hcca); + + /* Sometimes PCI D3 suspend trashes frame timings ... */ + periodic_reinit(ahcd); + + /* the following code is executed with ahcd->lock held and + * irqs disabled if and only if autostopped is true + */ + +skip_resume: + /* interrupts might have been disabled */ + admhc_writel(ahcd, OHCI_INTR_INIT, &ahcd->regs->int_enable); + if (ahcd->ed_rm_list) + admhc_writel(ahcd, OHCI_INTR_SF, &ahcd->regs->int_enable); + + /* Then re-enable operations */ + admhc_writel(ahcd, OHCI_USB_OPER, &ahcd->regs->control); + (void) admhc_readl(ahcd, &ahcd->regs->control); + if (!autostopped) + msleep (3); + + temp = ahcd->hc_control; + temp &= OHCI_CTRL_RWC; + temp |= OHCI_CONTROL_INIT | OHCI_USB_OPER; + ahcd->hc_control = temp; + admhc_writel(ahcd, temp, &ahcd->regs->control); + (void) admhc_readl(ahcd, &ahcd->regs->control); + + /* TRSMRCY */ + if (!autostopped) { + msleep (10); + spin_lock_irq(&ahcd->lock); + } + /* now ahcd->lock is always held and irqs are always disabled */ + + /* keep it alive for more than ~5x suspend + resume costs */ + ahcd->next_statechange = jiffies + STATECHANGE_DELAY; + + /* maybe turn schedules back on */ + enables = 0; + temp = 0; + if (!ahcd->ed_rm_list) { + if (ahcd->ed_controltail) { + admhc_writel(ahcd, + find_head (ahcd->ed_controltail)->dma, + &ahcd->regs->ed_controlhead); + enables |= OHCI_CTRL_CLE; + temp |= OHCI_CLF; + } + if (ahcd->ed_bulktail) { + admhc_writel(ahcd, find_head (ahcd->ed_bulktail)->dma, + &ahcd->regs->ed_bulkhead); + enables |= OHCI_CTRL_BLE; + temp |= OHCI_BLF; + } + } + if (hcd->self.bandwidth_isoc_reqs || hcd->self.bandwidth_int_reqs) + enables |= OHCI_CTRL_PLE|OHCI_CTRL_IE; + if (enables) { + admhc_dbg(ahcd, "restarting schedules ... %08x\n", enables); + ahcd->hc_control |= enables; + admhc_writel(ahcd, ahcd->hc_control, &ahcd->ahcd->regs->control); + if (temp) + admhc_writel(ahcd, temp, &ahcd->regs->cmdstatus); + (void) admhc_readl(ahcd, &ahcd->regs->control); + } + + return 0; +} + +static int admhc_bus_suspend(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + int rc; + + spin_lock_irq(&ahcd->lock); + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + rc = -ESHUTDOWN; + else + rc = admhc_rh_suspend(ahcd, 0); + spin_unlock_irq(&ahcd->lock); + return rc; +} + +static int admhc_bus_resume(struct usb_hcd *hcd) +{ + struct admhcd *ahcd = hcd_to_admhcd(hcd); + int rc; + + if (time_before(jiffies, ahcd->next_statechange)) + msleep(5); + + spin_lock_irq(&ahcd->lock); + + if (unlikely(!HCD_HW_ACCESSIBLE(hcd))) + rc = -ESHUTDOWN; + else + rc = admhc_rh_resume(ahcd); + spin_unlock_irq(&ahcd->lock); + + /* poll until we know a device is connected or we autostop */ + if (rc == 0) + usb_hcd_poll_rh_status(hcd); + return rc; +} + +/* Carry out polling-, autostop-, and autoresume-related state changes */ +static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed, + int any_connected) +{ + int poll_rh = 1; + + switch (ahcd->hc_control & OHCI_CTRL_HCFS) { + + case OHCI_USB_OPER: + /* keep on polling until we know a device is connected + * and RHSC is enabled */ + if (!ahcd->autostop) { + if (any_connected || + !device_may_wakeup(&admhcd_to_hcd(ahcd) + ->self.root_hub->dev)) { + if (admhc_readl(ahcd, &ahcd->regs->int_enable) & + OHCI_INTR_RHSC) + poll_rh = 0; + } else { + ahcd->autostop = 1; + ahcd->next_statechange = jiffies + HZ; + } + + /* if no devices have been attached for one second, autostop */ + } else { + if (changed || any_connected) { + ahcd->autostop = 0; + ahcd->next_statechange = jiffies + + STATECHANGE_DELAY; + } else if (time_after_eq(jiffies, + ahcd->next_statechange) + && !ahcd->ed_rm_list + && !(ahcd->hc_control & + OHCI_SCHED_ENABLES)) { + ahcd_rh_suspend(ahcd, 1); + } + } + break; + + /* if there is a port change, autostart or ask to be resumed */ + case OHCI_USB_SUSPEND: + case OHCI_USB_RESUME: + if (changed) { + if (ahcd->autostop) + admhc_rh_resume(ahcd); + else + usb_hcd_resume_root_hub(admhcd_to_hcd(ahcd)); + } else { + /* everything is idle, no need for polling */ + poll_rh = 0; + } + break; + } + return poll_rh; +} + +/*-------------------------------------------------------------------------*/ + +/* must not be called from interrupt context */ +static int admhc_restart(struct admhcd *ahcd) +{ + int temp; + int i; + struct urb_priv *priv; + + /* mark any devices gone, so they do nothing till khubd disconnects. + * recycle any "live" eds/tds (and urbs) right away. + * later, khubd disconnect processing will recycle the other state, + * (either as disconnect/reconnect, or maybe someday as a reset). + */ + spin_lock_irq(&ahcd->lock); + admhc_disable(ahcd); + usb_root_hub_lost_power(admhcd_to_hcd(ahcd)->self.root_hub); + if (!list_empty(&ahcd->pending)) + admhc_dbg(ahcd, "abort schedule...\n"); + list_for_each_entry(priv, &ahcd->pending, pending) { + struct urb *urb = priv->td[0]->urb; + struct ed *ed = priv->ed; + + switch (ed->state) { + case ED_OPER: + ed->state = ED_UNLINK; + ed->hwINFO |= cpu_to_hc32(ahcd, ED_DEQUEUE); + ed_deschedule (ahcd, ed); + + ed->ed_next = ahcd->ed_rm_list; + ed->ed_prev = NULL; + ahcd->ed_rm_list = ed; + /* FALLTHROUGH */ + case ED_UNLINK: + break; + default: + admhc_dbg(ahcd, "bogus ed %p state %d\n", + ed, ed->state); + } + + if (!urb->unlinked) + urb->unlinked = -ESHUTDOWN; + } + finish_unlinks(ahcd, 0); + spin_unlock_irq(&ahcd->lock); + + /* paranoia, in case that didn't work: */ + + /* empty the interrupt branches */ + for (i = 0; i < NUM_INTS; i++) ahcd->load[i] = 0; + for (i = 0; i < NUM_INTS; i++) ahcd->hcca->int_table[i] = 0; + + /* no EDs to remove */ + ahcd->ed_rm_list = NULL; + + /* empty control and bulk lists */ + ahcd->ed_controltail = NULL; + ahcd->ed_bulktail = NULL; + + if ((temp = admhc_run(ahcd)) < 0) { + admhc_err(ahcd, "can't restart, %d\n", temp); + return temp; + } else { + /* here we "know" root ports should always stay powered, + * and that if we try to turn them back on the root hub + * will respond to CSC processing. + */ + i = ahcd->num_ports; + while (i--) + admhc_writel(ahcd, RH_PS_PSS, + &ahcd->regs->portstatus[i]); + admhc_dbg(ahcd, "restart complete\n"); + } + return 0; +} + +#else /* CONFIG_PM */ + +static inline int admhc_rh_resume(struct admhcd *ahcd) +{ + return 0; +} + +/* Carry out polling-related state changes. + * autostop isn't used when CONFIG_PM is turned off. + */ +static int admhc_root_hub_state_changes(struct admhcd *ahcd, int changed, + int any_connected) +{ + /* If INSM is enabled, don't poll */ + if (admhc_readl(ahcd, &ahcd->regs->int_enable) & ADMHC_INTR_INSM) + return 0; + + /* If no status changes are pending, enable status-change interrupts */ + if (!changed) { + admhc_intr_enable(ahcd, ADMHC_INTR_INSM); + return 0; + } + + return 1; +} + +#endif /* CONFIG_PM */ + diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-q.c b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-q.c new file mode 100644 index 0000000..cd9c892 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120-q.c @@ -0,0 +1,964 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci-q.c + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +#include <linux/irq.h> +#include <linux/slab.h> + +/*-------------------------------------------------------------------------*/ + +/* + * URB goes back to driver, and isn't reissued. + * It's completely gone from HC data structures. + * PRECONDITION: ahcd lock held, irqs blocked. + */ +static void +finish_urb(struct admhcd *ahcd, struct urb *urb, int status) +__releases(ahcd->lock) +__acquires(ahcd->lock) +{ + urb_priv_free(ahcd, urb->hcpriv); + + if (likely(status == -EINPROGRESS)) + status = 0; + + switch (usb_pipetype(urb->pipe)) { + case PIPE_ISOCHRONOUS: + admhcd_to_hcd(ahcd)->self.bandwidth_isoc_reqs--; + break; + case PIPE_INTERRUPT: + admhcd_to_hcd(ahcd)->self.bandwidth_int_reqs--; + break; + } + +#ifdef ADMHC_VERBOSE_DEBUG + urb_print(ahcd, urb, "RET", usb_pipeout(urb->pipe), status); +#endif + + /* urb->complete() can reenter this HCD */ + usb_hcd_unlink_urb_from_ep(admhcd_to_hcd(ahcd), urb); + spin_unlock(&ahcd->lock); + usb_hcd_giveback_urb(admhcd_to_hcd(ahcd), urb, status); + spin_lock(&ahcd->lock); +} + + +/*-------------------------------------------------------------------------* + * ED handling functions + *-------------------------------------------------------------------------*/ + +#if 0 /* FIXME */ +/* search for the right schedule branch to use for a periodic ed. + * does some load balancing; returns the branch, or negative errno. + */ +static int balance(struct admhcd *ahcd, int interval, int load) +{ + int i, branch = -ENOSPC; + + /* iso periods can be huge; iso tds specify frame numbers */ + if (interval > NUM_INTS) + interval = NUM_INTS; + + /* search for the least loaded schedule branch of that period + * that has enough bandwidth left unreserved. + */ + for (i = 0; i < interval ; i++) { + if (branch < 0 || ahcd->load[branch] > ahcd->load[i]) { + int j; + + /* usb 1.1 says 90% of one frame */ + for (j = i; j < NUM_INTS; j += interval) { + if ((ahcd->load[j] + load) > 900) + break; + } + if (j < NUM_INTS) + continue; + branch = i; + } + } + return branch; +} +#endif + +/*-------------------------------------------------------------------------*/ + +#if 0 /* FIXME */ +/* both iso and interrupt requests have periods; this routine puts them + * into the schedule tree in the apppropriate place. most iso devices use + * 1msec periods, but that's not required. + */ +static void periodic_link(struct admhcd *ahcd, struct ed *ed) +{ + unsigned i; + + admhc_vdbg(ahcd, "link %sed %p branch %d [%dus.], interval %d\n", + (ed->hwINFO & cpu_to_hc32(ahcd, ED_ISO)) ? "iso " : "", + ed, ed->branch, ed->load, ed->interval); + + for (i = ed->branch; i < NUM_INTS; i += ed->interval) { + struct ed **prev = &ahcd->periodic[i]; + __hc32 *prev_p = &ahcd->hcca->int_table[i]; + struct ed *here = *prev; + + /* sorting each branch by period (slow before fast) + * lets us share the faster parts of the tree. + * (plus maybe: put interrupt eds before iso) + */ + while (here && ed != here) { + if (ed->interval > here->interval) + break; + prev = &here->ed_next; + prev_p = &here->hwNextED; + here = *prev; + } + if (ed != here) { + ed->ed_next = here; + if (here) + ed->hwNextED = *prev_p; + wmb(); + *prev = ed; + *prev_p = cpu_to_hc32(ahcd, ed->dma); + wmb(); + } + ahcd->load[i] += ed->load; + } + admhcd_to_hcd(ahcd)->self.bandwidth_allocated += ed->load / ed->interval; +} +#endif + +/* link an ed into the HC chain */ + +static int ed_schedule(struct admhcd *ahcd, struct ed *ed) +{ + struct ed *old_tail; + + if (admhcd_to_hcd(ahcd)->state == HC_STATE_QUIESCING) + return -EAGAIN; + + ed->state = ED_OPER; + + old_tail = ahcd->ed_tails[ed->type]; + + ed->ed_next = old_tail->ed_next; + if (ed->ed_next) { + ed->ed_next->ed_prev = ed; + ed->hwNextED = cpu_to_hc32(ahcd, ed->ed_next->dma); + } + ed->ed_prev = old_tail; + + old_tail->ed_next = ed; + old_tail->hwNextED = cpu_to_hc32(ahcd, ed->dma); + + ahcd->ed_tails[ed->type] = ed; + + admhc_dma_enable(ahcd); + + return 0; +} + +/*-------------------------------------------------------------------------*/ + +#if 0 /* FIXME */ +/* scan the periodic table to find and unlink this ED */ +static void periodic_unlink(struct admhcd *ahcd, struct ed *ed) +{ + int i; + + for (i = ed->branch; i < NUM_INTS; i += ed->interval) { + struct ed *temp; + struct ed **prev = &ahcd->periodic[i]; + __hc32 *prev_p = &ahcd->hcca->int_table[i]; + + while (*prev && (temp = *prev) != ed) { + prev_p = &temp->hwNextED; + prev = &temp->ed_next; + } + if (*prev) { + *prev_p = ed->hwNextED; + *prev = ed->ed_next; + } + ahcd->load[i] -= ed->load; + } + + admhcd_to_hcd(ahcd)->self.bandwidth_allocated -= ed->load / ed->interval; + admhc_vdbg(ahcd, "unlink %sed %p branch %d [%dus.], interval %d\n", + (ed->hwINFO & cpu_to_hc32(ahcd, ED_ISO)) ? "iso " : "", + ed, ed->branch, ed->load, ed->interval); +} +#endif + +/* unlink an ed from the HC chain. + * just the link to the ed is unlinked. + * the link from the ed still points to another operational ed or 0 + * so the HC can eventually finish the processing of the unlinked ed + * (assuming it already started that, which needn't be true). + * + * ED_UNLINK is a transient state: the HC may still see this ED, but soon + * it won't. ED_SKIP means the HC will finish its current transaction, + * but won't start anything new. The TD queue may still grow; device + * drivers don't know about this HCD-internal state. + * + * When the HC can't see the ED, something changes ED_UNLINK to one of: + * + * - ED_OPER: when there's any request queued, the ED gets rescheduled + * immediately. HC should be working on them. + * + * - ED_IDLE: when there's no TD queue. there's no reason for the HC + * to care about this ED; safe to disable the endpoint. + * + * When finish_unlinks() runs later, after SOF interrupt, it will often + * complete one or more URB unlinks before making that state change. + */ +static void ed_deschedule(struct admhcd *ahcd, struct ed *ed) +{ + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ED-DESCHED", ed, 1); +#endif + + ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP); + wmb(); + ed->state = ED_UNLINK; + + /* remove this ED from the HC list */ + ed->ed_prev->hwNextED = ed->hwNextED; + + /* and remove it from our list also */ + ed->ed_prev->ed_next = ed->ed_next; + + if (ed->ed_next) + ed->ed_next->ed_prev = ed->ed_prev; + + if (ahcd->ed_tails[ed->type] == ed) + ahcd->ed_tails[ed->type] = ed->ed_prev; +} + +/*-------------------------------------------------------------------------*/ + +static struct ed *ed_create(struct admhcd *ahcd, unsigned int type, u32 info) +{ + struct ed *ed; + struct td *td; + + ed = ed_alloc(ahcd, GFP_ATOMIC); + if (!ed) + goto err; + + /* dummy td; end of td list for this ed */ + td = td_alloc(ahcd, GFP_ATOMIC); + if (!td) + goto err_free_ed; + + switch (type) { + case PIPE_INTERRUPT: + info |= ED_INT; + break; + case PIPE_ISOCHRONOUS: + info |= ED_ISO; + break; + } + + ed->dummy = td; + ed->state = ED_IDLE; + ed->type = type; + + ed->hwINFO = cpu_to_hc32(ahcd, info); + ed->hwTailP = cpu_to_hc32(ahcd, td->td_dma); + ed->hwHeadP = ed->hwTailP; /* ED_C, ED_H zeroed */ + + return ed; + +err_free_ed: + ed_free(ahcd, ed); +err: + return NULL; +} + +/* get and maybe (re)init an endpoint. init _should_ be done only as part + * of enumeration, usb_set_configuration() or usb_set_interface(). + */ +static struct ed *ed_get(struct admhcd *ahcd, struct usb_host_endpoint *ep, + struct usb_device *udev, unsigned int pipe, int interval) +{ + struct ed *ed; + unsigned long flags; + + spin_lock_irqsave(&ahcd->lock, flags); + + ed = ep->hcpriv; + if (!ed) { + u32 info; + + /* FIXME: usbcore changes dev->devnum before SET_ADDRESS + * succeeds ... otherwise we wouldn't need "pipe". + */ + info = usb_pipedevice(pipe); + info |= (ep->desc.bEndpointAddress & ~USB_DIR_IN) << ED_EN_SHIFT; + info |= le16_to_cpu(ep->desc.wMaxPacketSize) << ED_MPS_SHIFT; + if (udev->speed == USB_SPEED_FULL) + info |= ED_SPEED_FULL; + + ed = ed_create(ahcd, usb_pipetype(pipe), info); + if (ed) + ep->hcpriv = ed; + } + + spin_unlock_irqrestore(&ahcd->lock, flags); + + return ed; +} + +/*-------------------------------------------------------------------------*/ + +/* request unlinking of an endpoint from an operational HC. + * put the ep on the rm_list + * real work is done at the next start frame (SOFI) hardware interrupt + * caller guarantees HCD is running, so hardware access is safe, + * and that ed->state is ED_OPER + */ +static void start_ed_unlink(struct admhcd *ahcd, struct ed *ed) +{ + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "ED-UNLINK", ed, 1); +#endif + + ed->hwINFO |= cpu_to_hc32(ahcd, ED_DEQUEUE); + ed_deschedule(ahcd, ed); + + /* add this ED into the remove list */ + ed->ed_rm_next = ahcd->ed_rm_list; + ahcd->ed_rm_list = ed; + + /* enable SOF interrupt */ + admhc_intr_ack(ahcd, ADMHC_INTR_SOFI); + admhc_intr_enable(ahcd, ADMHC_INTR_SOFI); + /* flush those writes */ + admhc_writel_flush(ahcd); + + /* SOF interrupt might get delayed; record the frame counter value that + * indicates when the HC isn't looking at it, so concurrent unlinks + * behave. frame_no wraps every 2^16 msec, and changes right before + * SOF is triggered. + */ + ed->tick = admhc_frame_no(ahcd) + 1; +} + +/*-------------------------------------------------------------------------* + * TD handling functions + *-------------------------------------------------------------------------*/ + +/* enqueue next TD for this URB (OHCI spec 5.2.8.2) */ + +static void +td_fill(struct admhcd *ahcd, u32 info, dma_addr_t data, int len, + struct urb *urb, int index) +{ + struct td *td, *td_pt; + struct urb_priv *urb_priv = urb->hcpriv; + int hash; + u32 cbl = 0; + +#if 1 + if (index == (urb_priv->td_cnt - 1) && + ((urb->transfer_flags & URB_NO_INTERRUPT) == 0)) + cbl |= TD_IE; +#else + if (index == (urb_priv->td_cnt - 1)) + cbl |= TD_IE; +#endif + + /* use this td as the next dummy */ + td_pt = urb_priv->td[index]; + + /* fill the old dummy TD */ + td = urb_priv->td[index] = urb_priv->ed->dummy; + urb_priv->ed->dummy = td_pt; + + td->ed = urb_priv->ed; + td->next_dl_td = NULL; + td->index = index; + td->urb = urb; + td->data_dma = data; + if (!len) + data = 0; + + if (data) + cbl |= (len & TD_BL_MASK); + + info |= TD_OWN; + + /* setup hardware specific fields */ + td->hwINFO = cpu_to_hc32(ahcd, info); + td->hwDBP = cpu_to_hc32(ahcd, data); + td->hwCBL = cpu_to_hc32(ahcd, cbl); + td->hwNextTD = cpu_to_hc32(ahcd, td_pt->td_dma); + + /* append to queue */ + list_add_tail(&td->td_list, &td->ed->td_list); + + /* hash it for later reverse mapping */ + hash = TD_HASH_FUNC(td->td_dma); + td->td_hash = ahcd->td_hash[hash]; + ahcd->td_hash[hash] = td; + + /* HC might read the TD (or cachelines) right away ... */ + wmb(); + td->ed->hwTailP = td->hwNextTD; +} + +/*-------------------------------------------------------------------------*/ + +/* Prepare all TDs of a transfer, and queue them onto the ED. + * Caller guarantees HC is active. + * Usually the ED is already on the schedule, so TDs might be + * processed as soon as they're queued. + */ +static void td_submit_urb(struct admhcd *ahcd, struct urb *urb) +{ + struct urb_priv *urb_priv = urb->hcpriv; + dma_addr_t data; + int data_len = urb->transfer_buffer_length; + int cnt = 0; + u32 info = 0; + int is_out = usb_pipeout(urb->pipe); + u32 toggle = 0; + + /* OHCI handles the bulk/interrupt data toggles itself. We just + * use the device toggle bits for resetting, and rely on the fact + * that resetting toggle is meaningless if the endpoint is active. + */ + + if (usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe), is_out)) { + toggle = TD_T_CARRY; + } else { + toggle = TD_T_DATA0; + usb_settoggle(urb->dev, usb_pipeendpoint (urb->pipe), + is_out, 1); + } + + urb_priv->td_idx = 0; + list_add(&urb_priv->pending, &ahcd->pending); + + if (data_len) + data = urb->transfer_dma; + else + data = 0; + + /* NOTE: TD_CC is set so we can tell which TDs the HC processed by + * using TD_CC_GET, as well as by seeing them on the done list. + * (CC = NotAccessed ... 0x0F, or 0x0E in PSWs for ISO.) + */ + switch (urb_priv->ed->type) { + case PIPE_INTERRUPT: + info = is_out + ? TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_OUT + : TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_IN; + + /* setup service interval and starting frame number */ + info |= (urb->start_frame & TD_FN_MASK); + info |= (urb->interval & TD_ISI_MASK) << TD_ISI_SHIFT; + + td_fill(ahcd, info, data, data_len, urb, cnt); + cnt++; + + admhcd_to_hcd(ahcd)->self.bandwidth_int_reqs++; + break; + + case PIPE_BULK: + info = is_out + ? TD_SCC_NOTACCESSED | TD_DP_OUT + : TD_SCC_NOTACCESSED | TD_DP_IN; + + /* TDs _could_ transfer up to 8K each */ + while (data_len > TD_DATALEN_MAX) { + td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle), + data, TD_DATALEN_MAX, urb, cnt); + data += TD_DATALEN_MAX; + data_len -= TD_DATALEN_MAX; + cnt++; + } + + td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle), data, + data_len, urb, cnt); + cnt++; + + if ((urb->transfer_flags & URB_ZERO_PACKET) + && (cnt < urb_priv->td_cnt)) { + td_fill(ahcd, info | ((cnt) ? TD_T_CARRY : toggle), + 0, 0, urb, cnt); + cnt++; + } + break; + + /* control manages DATA0/DATA1 toggle per-request; SETUP resets it, + * any DATA phase works normally, and the STATUS ack is special. + */ + case PIPE_CONTROL: + /* fill a TD for the setup */ + info = TD_SCC_NOTACCESSED | TD_DP_SETUP | TD_T_DATA0; + td_fill(ahcd, info, urb->setup_dma, 8, urb, cnt++); + + if (data_len > 0) { + /* fill a TD for the data */ + info = TD_SCC_NOTACCESSED | TD_T_DATA1; + info |= is_out ? TD_DP_OUT : TD_DP_IN; + /* NOTE: mishandles transfers >8K, some >4K */ + td_fill(ahcd, info, data, data_len, urb, cnt++); + } + + /* fill a TD for the ACK */ + info = (is_out || data_len == 0) + ? TD_SCC_NOTACCESSED | TD_DP_IN | TD_T_DATA1 + : TD_SCC_NOTACCESSED | TD_DP_OUT | TD_T_DATA1; + td_fill(ahcd, info, data, 0, urb, cnt++); + + break; + + /* ISO has no retransmit, so no toggle; + * Each TD could handle multiple consecutive frames (interval 1); + * we could often reduce the number of TDs here. + */ + case PIPE_ISOCHRONOUS: + info = is_out + ? TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_OUT + : TD_T_CARRY | TD_SCC_NOTACCESSED | TD_DP_IN; + + for (cnt = 0; cnt < urb->number_of_packets; cnt++) { + int frame = urb->start_frame; + + frame += cnt * urb->interval; + frame &= TD_FN_MASK; + td_fill(ahcd, info | frame, + data + urb->iso_frame_desc[cnt].offset, + urb->iso_frame_desc[cnt].length, urb, cnt); + } + admhcd_to_hcd(ahcd)->self.bandwidth_isoc_reqs++; + break; + } + + if (urb_priv->td_cnt != cnt) + admhc_err(ahcd, "bad number of tds created for urb %p\n", urb); +} + +/*-------------------------------------------------------------------------* + * Done List handling functions + *-------------------------------------------------------------------------*/ + +/* calculate transfer length/status and update the urb */ +static int td_done(struct admhcd *ahcd, struct urb *urb, struct td *td) +{ + struct urb_priv *urb_priv = urb->hcpriv; + u32 info; + u32 bl; + u32 tdDBP; + int type = usb_pipetype(urb->pipe); + int cc; + int status = -EINPROGRESS; + + info = hc32_to_cpup(ahcd, &td->hwINFO); + tdDBP = hc32_to_cpup(ahcd, &td->hwDBP); + bl = TD_BL_GET(hc32_to_cpup(ahcd, &td->hwCBL)); + cc = TD_CC_GET(info); + + /* ISO ... drivers see per-TD length/status */ + if (type == PIPE_ISOCHRONOUS) { + /* TODO */ + int dlen = 0; + + /* NOTE: assumes FC in tdINFO == 0, and that + * only the first of 0..MAXPSW psws is used. + */ + if (info & TD_CC) /* hc didn't touch? */ + return status; + + if (usb_pipeout(urb->pipe)) + dlen = urb->iso_frame_desc[td->index].length; + else { + /* short reads are always OK for ISO */ + if (cc == TD_CC_DATAUNDERRUN) + cc = TD_CC_NOERROR; + dlen = tdDBP - td->data_dma + bl; + } + + urb->actual_length += dlen; + urb->iso_frame_desc[td->index].actual_length = dlen; + urb->iso_frame_desc[td->index].status = cc_to_error[cc]; + + if (cc != TD_CC_NOERROR) + admhc_vdbg(ahcd, + "urb %p iso td %p (%d) len %d cc %d\n", + urb, td, 1 + td->index, dlen, cc); + + /* BULK, INT, CONTROL ... drivers see aggregate length/status, + * except that "setup" bytes aren't counted and "short" transfers + * might not be reported as errors. + */ + } else { + /* update packet status if needed (short is normally ok) */ + if (cc == TD_CC_DATAUNDERRUN + && !(urb->transfer_flags & URB_SHORT_NOT_OK)) + cc = TD_CC_NOERROR; + + if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0) + status = cc_to_error[cc]; + + + /* count all non-empty packets except control SETUP packet */ + if ((type != PIPE_CONTROL || td->index != 0) && tdDBP != 0) + urb->actual_length += tdDBP - td->data_dma + bl; + + if (cc != TD_CC_NOERROR && cc < TD_CC_HCD0) + admhc_vdbg(ahcd, + "urb %p td %p (%d) cc %d, len=%d/%d\n", + urb, td, td->index, cc, + urb->actual_length, + urb->transfer_buffer_length); + } + + list_del(&td->td_list); + urb_priv->td_idx++; + + return status; +} + +/*-------------------------------------------------------------------------*/ + +static void ed_halted(struct admhcd *ahcd, struct td *td, int cc) +{ + struct urb *urb = td->urb; + struct urb_priv *urb_priv = urb->hcpriv; + struct ed *ed = td->ed; + struct list_head *tmp = td->td_list.next; + __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); + + admhc_dump_ed(ahcd, "ed halted", td->ed, 1); + /* clear ed halt; this is the td that caused it, but keep it inactive + * until its urb->complete() has a chance to clean up. + */ + ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP); + wmb(); + ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H); + + /* Get rid of all later tds from this urb. We don't have + * to be careful: no errors and nothing was transferred. + * Also patch the ed so it looks as if those tds completed normally. + */ + while (tmp != &ed->td_list) { + struct td *next; + + next = list_entry(tmp, struct td, td_list); + tmp = next->td_list.next; + + if (next->urb != urb) + break; + + /* NOTE: if multi-td control DATA segments get supported, + * this urb had one of them, this td wasn't the last td + * in that segment (TD_R clear), this ed halted because + * of a short read, _and_ URB_SHORT_NOT_OK is clear ... + * then we need to leave the control STATUS packet queued + * and clear ED_SKIP. + */ + list_del(&next->td_list); + urb_priv->td_cnt++; + ed->hwHeadP = next->hwNextTD | toggle; + } + + /* help for troubleshooting: report anything that + * looks odd ... that doesn't include protocol stalls + * (or maybe some other things) + */ + switch (cc) { + case TD_CC_DATAUNDERRUN: + if ((urb->transfer_flags & URB_SHORT_NOT_OK) == 0) + break; + /* fallthrough */ + case TD_CC_STALL: + if (usb_pipecontrol(urb->pipe)) + break; + /* fallthrough */ + default: + admhc_dbg(ahcd, + "urb %p path %s ep%d%s %08x cc %d --> status %d\n", + urb, urb->dev->devpath, + usb_pipeendpoint (urb->pipe), + usb_pipein(urb->pipe) ? "in" : "out", + hc32_to_cpu(ahcd, td->hwINFO), + cc, cc_to_error[cc]); + } +} + +/*-------------------------------------------------------------------------*/ + +/* there are some urbs/eds to unlink; called in_irq(), with HCD locked */ +static void +finish_unlinks(struct admhcd *ahcd, u16 tick) +{ + struct ed *ed, **last; + +rescan_all: + for (last = &ahcd->ed_rm_list, ed = *last; ed != NULL; ed = *last) { + struct list_head *entry, *tmp; + int completed, modified; + __hc32 *prev; + + /* only take off EDs that the HC isn't using, accounting for + * frame counter wraps and EDs with partially retired TDs + */ + if (likely(HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state))) { + if (tick_before(tick, ed->tick)) { +skip_ed: + last = &ed->ed_rm_next; + continue; + } +#if 0 + if (!list_empty(&ed->td_list)) { + struct td *td; + u32 head; + + td = list_entry(ed->td_list.next, struct td, + td_list); + head = hc32_to_cpu(ahcd, ed->hwHeadP) & + TD_MASK; + + /* INTR_WDH may need to clean up first */ + if (td->td_dma != head) + goto skip_ed; + } +#endif + } + + /* reentrancy: if we drop the schedule lock, someone might + * have modified this list. normally it's just prepending + * entries (which we'd ignore), but paranoia won't hurt. + */ + *last = ed->ed_rm_next; + ed->ed_rm_next = NULL; + modified = 0; + + /* unlink urbs as requested, but rescan the list after + * we call a completion since it might have unlinked + * another (earlier) urb + * + * When we get here, the HC doesn't see this ed. But it + * must not be rescheduled until all completed URBs have + * been given back to the driver. + */ +rescan_this: + completed = 0; + prev = &ed->hwHeadP; + list_for_each_safe(entry, tmp, &ed->td_list) { + struct td *td; + struct urb *urb; + struct urb_priv *urb_priv; + __hc32 savebits; + u32 tdINFO; + int status; + + td = list_entry(entry, struct td, td_list); + urb = td->urb; + urb_priv = td->urb->hcpriv; + + if (!urb->unlinked) { + prev = &td->hwNextTD; + continue; + } + + if ((urb_priv) == NULL) + continue; + + /* patch pointer hc uses */ + savebits = *prev & ~cpu_to_hc32(ahcd, TD_MASK); + *prev = td->hwNextTD | savebits; + /* If this was unlinked, the TD may not have been + * retired ... so manually save dhe data toggle. + * The controller ignores the value we save for + * control and ISO endpoints. + */ + tdINFO = hc32_to_cpup(ahcd, &td->hwINFO); + if ((tdINFO & TD_T) == TD_T_DATA0) + ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_C); + else if ((tdINFO & TD_T) == TD_T_DATA1) + ed->hwHeadP |= cpu_to_hc32(ahcd, ED_C); + + /* HC may have partly processed this TD */ +#ifdef ADMHC_VERBOSE_DEBUG + urb_print(ahcd, urb, "PARTIAL", 0); +#endif + status = td_done(ahcd, urb, td); + + /* if URB is done, clean up */ + if (urb_priv->td_idx == urb_priv->td_cnt) { + modified = completed = 1; + finish_urb(ahcd, urb, status); + } + } + if (completed && !list_empty(&ed->td_list)) + goto rescan_this; + + /* ED's now officially unlinked, hc doesn't see */ + ed->state = ED_IDLE; + ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H); + ed->hwNextED = 0; + wmb(); + ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP | ED_DEQUEUE); + + /* but if there's work queued, reschedule */ + if (!list_empty(&ed->td_list)) { + if (HC_IS_RUNNING(admhcd_to_hcd(ahcd)->state)) + ed_schedule(ahcd, ed); + } + + if (modified) + goto rescan_all; + } +} + +/*-------------------------------------------------------------------------*/ +/* + * Process normal completions (error or success) and clean the schedules. + * + * This is the main path for handing urbs back to drivers. The only other + * normal path is finish_unlinks(), which unlinks URBs using ed_rm_list, + * instead of scanning the (re-reversed) donelist as this does. + */ + +static void ed_unhalt(struct admhcd *ahcd, struct ed *ed, struct urb *urb) +{ + struct list_head *entry, *tmp; + __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "UNHALT", ed, 0); +#endif + /* clear ed halt; this is the td that caused it, but keep it inactive + * until its urb->complete() has a chance to clean up. + */ + ed->hwINFO |= cpu_to_hc32(ahcd, ED_SKIP); + wmb(); + ed->hwHeadP &= ~cpu_to_hc32(ahcd, ED_H); + + list_for_each_safe(entry, tmp, &ed->td_list) { + struct td *td = list_entry(entry, struct td, td_list); + __hc32 info; + + if (td->urb != urb) + break; + + info = td->hwINFO; + info &= ~cpu_to_hc32(ahcd, TD_CC | TD_OWN); + td->hwINFO = info; + + ed->hwHeadP = td->hwNextTD | toggle; + wmb(); + } + +} + +static void ed_intr_refill(struct admhcd *ahcd, struct ed *ed) +{ + __hc32 toggle = ed->hwHeadP & cpu_to_hc32(ahcd, ED_C); + + ed->hwHeadP = ed->hwTailP | toggle; +} + + +static inline int is_ed_halted(struct admhcd *ahcd, struct ed *ed) +{ + return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & ED_H) == ED_H); +} + +static inline int is_td_halted(struct admhcd *ahcd, struct ed *ed, + struct td *td) +{ + return ((hc32_to_cpup(ahcd, &ed->hwHeadP) & TD_MASK) == + (hc32_to_cpup(ahcd, &td->hwNextTD) & TD_MASK)); +} + +static void ed_update(struct admhcd *ahcd, struct ed *ed) +{ + struct list_head *entry, *tmp; + +#ifdef ADMHC_VERBOSE_DEBUG + admhc_dump_ed(ahcd, "UPDATE", ed, 1); +#endif + + list_for_each_safe(entry, tmp, &ed->td_list) { + struct td *td = list_entry(entry, struct td, td_list); + struct urb *urb = td->urb; + struct urb_priv *urb_priv = urb->hcpriv; + int status; + + if (hc32_to_cpup(ahcd, &td->hwINFO) & TD_OWN) + break; + + /* update URB's length and status from TD */ + status = td_done(ahcd, urb, td); + if (is_ed_halted(ahcd, ed) && is_td_halted(ahcd, ed, td)) + ed_unhalt(ahcd, ed, urb); + + if (ed->type == PIPE_INTERRUPT) + ed_intr_refill(ahcd, ed); + + /* If all this urb's TDs are done, call complete() */ + if (urb_priv->td_idx == urb_priv->td_cnt) + finish_urb(ahcd, urb, status); + + /* clean schedule: unlink EDs that are no longer busy */ + if (list_empty(&ed->td_list)) { + if (ed->state == ED_OPER) + start_ed_unlink(ahcd, ed); + + /* ... reenabling halted EDs only after fault cleanup */ + } else if ((ed->hwINFO & cpu_to_hc32(ahcd, + ED_SKIP | ED_DEQUEUE)) + == cpu_to_hc32(ahcd, ED_SKIP)) { + td = list_entry(ed->td_list.next, struct td, td_list); +#if 0 + if (!(td->hwINFO & cpu_to_hc32(ahcd, TD_DONE))) { + ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP); + /* ... hc may need waking-up */ + switch (ed->type) { + case PIPE_CONTROL: + admhc_writel(ahcd, OHCI_CLF, + &ahcd->regs->cmdstatus); + break; + case PIPE_BULK: + admhc_writel(ahcd, OHCI_BLF, + &ahcd->regs->cmdstatus); + break; + } + } +#else + if ((td->hwINFO & cpu_to_hc32(ahcd, TD_OWN))) + ed->hwINFO &= ~cpu_to_hc32(ahcd, ED_SKIP); +#endif + } + + } +} + +/* there are some tds completed; called in_irq(), with HCD locked */ +static void admhc_td_complete(struct admhcd *ahcd) +{ + struct ed *ed; + + for (ed = ahcd->ed_head; ed; ed = ed->ed_next) { + if (ed->state != ED_OPER) + continue; + + ed_update(ahcd, ed); + } +} diff --git a/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120.h b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120.h new file mode 100644 index 0000000..e47aac8 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/usb/host/adm5120.h @@ -0,0 +1,755 @@ +/* + * ADM5120 HCD (Host Controller Driver) for USB + * + * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> + * + * This file was derived from: drivers/usb/host/ohci.h + * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at> + * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + */ + +/* + * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to + * __leXX (normally) or __beXX (given OHCI_BIG_ENDIAN), depending on the + * host controller implementation. + */ +typedef __u32 __bitwise __hc32; +typedef __u16 __bitwise __hc16; + +/* + * OHCI Endpoint Descriptor (ED) ... holds TD queue + * See OHCI spec, section 4.2 + * + * This is a "Queue Head" for those transfers, which is why + * both EHCI and UHCI call similar structures a "QH". + */ + +#define TD_DATALEN_MAX 4096 + +#define ED_ALIGN 16 +#define ED_MASK ((u32)~(ED_ALIGN-1)) /* strip hw status in low addr bits */ + +struct ed { + /* first fields are hardware-specified */ + __hc32 hwINFO; /* endpoint config bitmap */ + /* info bits defined by hcd */ +#define ED_DEQUEUE (1 << 27) + /* info bits defined by the hardware */ +#define ED_MPS_SHIFT 16 +#define ED_MPS_MASK ((1 << 11)-1) +#define ED_MPS_GET(x) (((x) >> ED_MPS_SHIFT) & ED_MPS_MASK) +#define ED_ISO (1 << 15) /* isochronous endpoint */ +#define ED_SKIP (1 << 14) +#define ED_SPEED_FULL (1 << 13) /* fullspeed device */ +#define ED_INT (1 << 11) /* interrupt endpoint */ +#define ED_EN_SHIFT 7 /* endpoint shift */ +#define ED_EN_MASK ((1 << 4)-1) /* endpoint mask */ +#define ED_EN_GET(x) (((x) >> ED_EN_SHIFT) & ED_EN_MASK) +#define ED_FA_MASK ((1 << 7)-1) /* function address mask */ +#define ED_FA_GET(x) ((x) & ED_FA_MASK) + __hc32 hwTailP; /* tail of TD list */ + __hc32 hwHeadP; /* head of TD list (hc r/w) */ +#define ED_C (0x02) /* toggle carry */ +#define ED_H (0x01) /* halted */ + __hc32 hwNextED; /* next ED in list */ + + /* rest are purely for the driver's use */ + dma_addr_t dma; /* addr of ED */ + struct td *dummy; /* next TD to activate */ + + struct list_head urb_list; /* list of our URBs */ + + /* host's view of schedule */ + struct ed *ed_next; /* on schedule list */ + struct ed *ed_prev; /* for non-interrupt EDs */ + struct ed *ed_rm_next; /* on rm list */ + struct list_head td_list; /* "shadow list" of our TDs */ + + /* create --> IDLE --> OPER --> ... --> IDLE --> destroy + * usually: OPER --> UNLINK --> (IDLE | OPER) --> ... + */ + u8 state; /* ED_{IDLE,UNLINK,OPER} */ +#define ED_IDLE 0x00 /* NOT linked to HC */ +#define ED_UNLINK 0x01 /* being unlinked from hc */ +#define ED_OPER 0x02 /* IS linked to hc */ + + u8 type; /* PIPE_{BULK,...} */ + + /* periodic scheduling params (for intr and iso) */ + u8 branch; + u16 interval; + u16 load; + u16 last_iso; /* iso only */ + + /* HC may see EDs on rm_list until next frame (frame_no == tick) */ + u16 tick; +} __attribute__ ((aligned(ED_ALIGN))); + +/* + * OHCI Transfer Descriptor (TD) ... one per transfer segment + * See OHCI spec, sections 4.3.1 (general = control/bulk/interrupt) + * and 4.3.2 (iso) + */ + +#define TD_ALIGN 32 +#define TD_MASK ((u32)~(TD_ALIGN-1)) /* strip hw status in low addr bits */ + +struct td { + /* first fields are hardware-specified */ + __hc32 hwINFO; /* transfer info bitmask */ + + /* hwINFO bits */ +#define TD_OWN (1 << 31) /* owner of the descriptor */ +#define TD_CC_SHIFT 27 /* condition code */ +#define TD_CC_MASK 0xf +#define TD_CC (TD_CC_MASK << TD_CC_SHIFT) +#define TD_CC_GET(x) (((x) >> TD_CC_SHIFT) & TD_CC_MASK) + +#define TD_EC_SHIFT 25 /* error count */ +#define TD_EC_MASK 0x3 +#define TD_EC (TD_EC_MASK << TD_EC_SHIFT) +#define TD_EC_GET(x) ((x >> TD_EC_SHIFT) & TD_EC_MASK) +#define TD_T_SHIFT 23 /* data toggle state */ +#define TD_T_MASK 0x3 +#define TD_T (TD_T_MASK << TD_T_SHIFT) +#define TD_T_DATA0 (0x2 << TD_T_SHIFT) /* DATA0 */ +#define TD_T_DATA1 (0x3 << TD_T_SHIFT) /* DATA1 */ +#define TD_T_CARRY (0x0 << TD_T_SHIFT) /* uses ED_C */ +#define TD_T_GET(x) (((x) >> TD_T_SHIFT) & TD_T_MASK) +#define TD_DP_SHIFT 21 /* direction/pid */ +#define TD_DP_MASK 0x3 +#define TD_DP (TD_DP_MASK << TD_DP_SHIFT) +#define TD_DP_GET (((x) >> TD_DP_SHIFT) & TD_DP_MASK) +#define TD_DP_SETUP (0x0 << TD_DP_SHIFT) /* SETUP pid */ +#define TD_DP_OUT (0x1 << TD_DP_SHIFT) /* OUT pid */ +#define TD_DP_IN (0x2 << TD_DP_SHIFT) /* IN pid */ +#define TD_ISI_SHIFT 8 /* Interrupt Service Interval */ +#define TD_ISI_MASK 0x3f +#define TD_ISI_GET(x) (((x) >> TD_ISI_SHIFT) & TD_ISI_MASK) +#define TD_FN_MASK 0x3f /* frame number */ +#define TD_FN_GET(x) ((x) & TD_FN_MASK) + + __hc32 hwDBP; /* Data Buffer Pointer (or 0) */ + __hc32 hwCBL; /* Controller/Buffer Length */ + + /* hwCBL bits */ +#define TD_BL_MASK 0xffff /* buffer length */ +#define TD_BL_GET(x) ((x) & TD_BL_MASK) +#define TD_IE (1 << 16) /* interrupt enable */ + __hc32 hwNextTD; /* Next TD Pointer */ + + /* rest are purely for the driver's use */ + __u8 index; + struct ed *ed; + struct td *td_hash; /* dma-->td hashtable */ + struct td *next_dl_td; + struct urb *urb; + + dma_addr_t td_dma; /* addr of this TD */ + dma_addr_t data_dma; /* addr of data it points to */ + + struct list_head td_list; /* "shadow list", TDs on same ED */ + + u32 flags; +#define TD_FLAG_DONE (1 << 17) /* retired to done list */ +#define TD_FLAG_ISO (1 << 16) /* copy of ED_ISO */ +} __attribute__ ((aligned(TD_ALIGN))); /* c/b/i need 16; only iso needs 32 */ + +/* + * Hardware transfer status codes -- CC from td->hwINFO + */ +#define TD_CC_NOERROR 0x00 +#define TD_CC_CRC 0x01 +#define TD_CC_BITSTUFFING 0x02 +#define TD_CC_DATATOGGLEM 0x03 +#define TD_CC_STALL 0x04 +#define TD_CC_DEVNOTRESP 0x05 +#define TD_CC_PIDCHECKFAIL 0x06 +#define TD_CC_UNEXPECTEDPID 0x07 +#define TD_CC_DATAOVERRUN 0x08 +#define TD_CC_DATAUNDERRUN 0x09 + /* 0x0A, 0x0B reserved for hardware */ +#define TD_CC_BUFFEROVERRUN 0x0C +#define TD_CC_BUFFERUNDERRUN 0x0D + /* 0x0E, 0x0F reserved for HCD */ +#define TD_CC_HCD0 0x0E +#define TD_CC_NOTACCESSED 0x0F + +/* + * preshifted status codes + */ +#define TD_SCC_NOTACCESSED (TD_CC_NOTACCESSED << TD_CC_SHIFT) + + +/* map OHCI TD status codes (CC) to errno values */ +static const int cc_to_error[16] = { + /* No Error */ 0, + /* CRC Error */ -EILSEQ, + /* Bit Stuff */ -EPROTO, + /* Data Togg */ -EILSEQ, + /* Stall */ -EPIPE, + /* DevNotResp */ -ETIME, + /* PIDCheck */ -EPROTO, + /* UnExpPID */ -EPROTO, + /* DataOver */ -EOVERFLOW, + /* DataUnder */ -EREMOTEIO, + /* (for hw) */ -EIO, + /* (for hw) */ -EIO, + /* BufferOver */ -ECOMM, + /* BuffUnder */ -ENOSR, + /* (for HCD) */ -EALREADY, + /* (for HCD) */ -EALREADY +}; + +#define NUM_INTS 32 + +/* + * This is the structure of the OHCI controller's memory mapped I/O region. + * You must use readl() and writel() (in <asm/io.h>) to access these fields!! + * Layout is in section 7 (and appendix B) of the spec. + */ +struct admhcd_regs { + __hc32 gencontrol; /* General Control */ + __hc32 int_status; /* Interrupt Status */ + __hc32 int_enable; /* Interrupt Enable */ + __hc32 reserved00; + __hc32 host_control; /* Host General Control */ + __hc32 reserved01; + __hc32 fminterval; /* Frame Interval */ + __hc32 fmnumber; /* Frame Number */ + __hc32 reserved02; + __hc32 reserved03; + __hc32 reserved04; + __hc32 reserved05; + __hc32 reserved06; + __hc32 reserved07; + __hc32 reserved08; + __hc32 reserved09; + __hc32 reserved10; + __hc32 reserved11; + __hc32 reserved12; + __hc32 reserved13; + __hc32 reserved14; + __hc32 reserved15; + __hc32 reserved16; + __hc32 reserved17; + __hc32 reserved18; + __hc32 reserved19; + __hc32 reserved20; + __hc32 reserved21; + __hc32 lsthresh; /* Low Speed Threshold */ + __hc32 rhdesc; /* Root Hub Descriptor */ +#define MAX_ROOT_PORTS 2 + __hc32 portstatus[MAX_ROOT_PORTS]; /* Port Status */ + __hc32 hosthead; /* Host Descriptor Head */ +} __attribute__ ((aligned(32))); + +/* + * General Control register bits + */ +#define ADMHC_CTRL_UHFE (1 << 0) /* USB Host Function Enable */ +#define ADMHC_CTRL_SIR (1 << 1) /* Software Interrupt request */ +#define ADMHC_CTRL_DMAA (1 << 2) /* DMA Arbitration Control */ +#define ADMHC_CTRL_SR (1 << 3) /* Software Reset */ + +/* + * Host General Control register bits + */ +#define ADMHC_HC_BUSS 0x3 /* USB bus state */ +#define ADMHC_BUSS_RESET 0x0 +#define ADMHC_BUSS_RESUME 0x1 +#define ADMHC_BUSS_OPER 0x2 +#define ADMHC_BUSS_SUSPEND 0x3 +#define ADMHC_HC_DMAE (1 << 2) /* DMA enable */ + +/* + * Interrupt Status/Enable register bits + */ +#define ADMHC_INTR_SOFI (1 << 4) /* start of frame */ +#define ADMHC_INTR_RESI (1 << 5) /* resume detected */ +#define ADMHC_INTR_6 (1 << 6) /* unknown */ +#define ADMHC_INTR_7 (1 << 7) /* unknown */ +#define ADMHC_INTR_BABI (1 << 8) /* babble detected */ +#define ADMHC_INTR_INSM (1 << 9) /* root hub status change */ +#define ADMHC_INTR_SO (1 << 10) /* scheduling overrun */ +#define ADMHC_INTR_FNO (1 << 11) /* frame number overflow */ +#define ADMHC_INTR_TDC (1 << 20) /* transfer descriptor completed */ +#define ADMHC_INTR_SWI (1 << 29) /* software interrupt */ +#define ADMHC_INTR_FATI (1 << 30) /* fatal error */ +#define ADMHC_INTR_INTA (1 << 31) /* interrupt active */ + +#define ADMHC_INTR_MIE (1 << 31) /* master interrupt enable */ + +/* + * SOF Frame Interval register bits + */ +#define ADMHC_SFI_FI_MASK ((1 << 14)-1) /* Frame Interval value */ +#define ADMHC_SFI_FSLDP_SHIFT 16 +#define ADMHC_SFI_FSLDP_MASK ((1 << 15)-1) +#define ADMHC_SFI_FIT (1 << 31) /* Frame Interval Toggle */ + +/* + * SOF Frame Number register bits + */ +#define ADMHC_SFN_FN_MASK ((1 << 16)-1) /* Frame Number Mask */ +#define ADMHC_SFN_FR_SHIFT 16 /* Frame Remaining Shift */ +#define ADMHC_SFN_FR_MASK ((1 << 14)-1) /* Frame Remaining Mask */ +#define ADMHC_SFN_FRT (1 << 31) /* Frame Remaining Toggle */ + +/* + * Root Hub Descriptor register bits + */ +#define ADMHC_RH_NUMP 0xff /* number of ports */ +#define ADMHC_RH_PSM (1 << 8) /* power switching mode */ +#define ADMHC_RH_NPS (1 << 9) /* no power switching */ +#define ADMHC_RH_OCPM (1 << 10) /* over current protection mode */ +#define ADMHC_RH_NOCP (1 << 11) /* no over current protection */ +#define ADMHC_RH_PPCM (0xff << 16) /* port power control */ + +#define ADMHC_RH_LPS (1 << 24) /* local power switch */ +#define ADMHC_RH_OCI (1 << 25) /* over current indicator */ + +/* status change bits */ +#define ADMHC_RH_LPSC (1 << 26) /* local power switch change */ +#define ADMHC_RH_OCIC (1 << 27) /* over current indicator change */ + +#define ADMHC_RH_DRWE (1 << 28) /* device remote wakeup enable */ +#define ADMHC_RH_CRWE (1 << 29) /* clear remote wakeup enable */ + +#define ADMHC_RH_CGP (1 << 24) /* clear global power */ +#define ADMHC_RH_SGP (1 << 26) /* set global power */ + +/* + * Port Status register bits + */ +#define ADMHC_PS_CCS (1 << 0) /* current connect status */ +#define ADMHC_PS_PES (1 << 1) /* port enable status */ +#define ADMHC_PS_PSS (1 << 2) /* port suspend status */ +#define ADMHC_PS_POCI (1 << 3) /* port over current indicator */ +#define ADMHC_PS_PRS (1 << 4) /* port reset status */ +#define ADMHC_PS_PPS (1 << 8) /* port power status */ +#define ADMHC_PS_LSDA (1 << 9) /* low speed device attached */ + +/* status change bits */ +#define ADMHC_PS_CSC (1 << 16) /* connect status change */ +#define ADMHC_PS_PESC (1 << 17) /* port enable status change */ +#define ADMHC_PS_PSSC (1 << 18) /* port suspend status change */ +#define ADMHC_PS_OCIC (1 << 19) /* over current indicator change */ +#define ADMHC_PS_PRSC (1 << 20) /* port reset status change */ + +/* port feature bits */ +#define ADMHC_PS_CPE (1 << 0) /* clear port enable */ +#define ADMHC_PS_SPE (1 << 1) /* set port enable */ +#define ADMHC_PS_SPS (1 << 2) /* set port suspend */ +#define ADMHC_PS_CPS (1 << 3) /* clear suspend status */ +#define ADMHC_PS_SPR (1 << 4) /* set port reset */ +#define ADMHC_PS_SPP (1 << 8) /* set port power */ +#define ADMHC_PS_CPP (1 << 9) /* clear port power */ + +/* + * the POTPGT value is not defined in the ADMHC, so define a dummy value + */ +#define ADMHC_POTPGT 2 /* in ms */ + +/* hcd-private per-urb state */ +struct urb_priv { + struct ed *ed; + struct list_head pending; /* URBs on the same ED */ + + u32 td_cnt; /* # tds in this request */ + u32 td_idx; /* index of the current td */ + struct td *td[0]; /* all TDs in this request */ +}; + +#define TD_HASH_SIZE 64 /* power'o'two */ +/* sizeof (struct td) ~= 64 == 2^6 ... */ +#define TD_HASH_FUNC(td_dma) ((td_dma ^ (td_dma >> 6)) % TD_HASH_SIZE) + +/* + * This is the full ADMHCD controller description + * + * Note how the "proper" USB information is just + * a subset of what the full implementation needs. (Linus) + */ + +struct admhcd { + spinlock_t lock; + + /* + * I/O memory used to communicate with the HC (dma-consistent) + */ + struct admhcd_regs __iomem *regs; + + /* + * hcd adds to schedule for a live hc any time, but removals finish + * only at the start of the next frame. + */ + + struct ed *ed_head; + struct ed *ed_tails[4]; + + struct ed *ed_rm_list; /* to be removed */ + + struct ed *periodic[NUM_INTS]; /* shadow int_table */ + +#if 0 /* TODO: remove? */ + /* + * OTG controllers and transceivers need software interaction; + * other external transceivers should be software-transparent + */ + struct otg_transceiver *transceiver; + void (*start_hnp)(struct admhcd *ahcd); +#endif + + /* + * memory management for queue data structures + */ + struct dma_pool *td_cache; + struct dma_pool *ed_cache; + struct td *td_hash[TD_HASH_SIZE]; + struct list_head pending; + + /* + * driver state + */ + int num_ports; + int load[NUM_INTS]; + u32 host_control; /* copy of the host_control reg */ + unsigned long next_statechange; /* suspend/resume */ + u32 fminterval; /* saved register */ + unsigned autostop:1; /* rh auto stopping/stopped */ + + unsigned long flags; /* for HC bugs */ +#define OHCI_QUIRK_AMD756 0x01 /* erratum #4 */ +#define OHCI_QUIRK_SUPERIO 0x02 /* natsemi */ +#define OHCI_QUIRK_INITRESET 0x04 /* SiS, OPTi, ... */ +#define OHCI_QUIRK_BE_DESC 0x08 /* BE descriptors */ +#define OHCI_QUIRK_BE_MMIO 0x10 /* BE registers */ +#define OHCI_QUIRK_ZFMICRO 0x20 /* Compaq ZFMicro chipset*/ + /* there are also chip quirks/bugs in init logic */ + +#ifdef DEBUG + struct dentry *debug_dir; + struct dentry *debug_async; + struct dentry *debug_periodic; + struct dentry *debug_registers; +#endif +}; + +/* convert between an hcd pointer and the corresponding ahcd_hcd */ +static inline struct admhcd *hcd_to_admhcd(struct usb_hcd *hcd) +{ + return (struct admhcd *)(hcd->hcd_priv); +} +static inline struct usb_hcd *admhcd_to_hcd(const struct admhcd *ahcd) +{ + return container_of((void *)ahcd, struct usb_hcd, hcd_priv); +} + +/*-------------------------------------------------------------------------*/ + +#ifndef DEBUG +#define STUB_DEBUG_FILES +#endif /* DEBUG */ + +#ifdef DEBUG +# define admhc_dbg(ahcd, fmt, args...) \ + printk(KERN_DEBUG "adm5120-hcd: " fmt, ## args) +#else +# define admhc_dbg(ahcd, fmt, args...) do { } while (0) +#endif + +#define admhc_err(ahcd, fmt, args...) \ + printk(KERN_ERR "adm5120-hcd: " fmt, ## args) +#define admhc_info(ahcd, fmt, args...) \ + printk(KERN_INFO "adm5120-hcd: " fmt, ## args) +#define admhc_warn(ahcd, fmt, args...) \ + printk(KERN_WARNING "adm5120-hcd: " fmt, ## args) + +#ifdef ADMHC_VERBOSE_DEBUG +# define admhc_vdbg admhc_dbg +#else +# define admhc_vdbg(ahcd, fmt, args...) do { } while (0) +#endif + +/*-------------------------------------------------------------------------*/ + +/* + * While most USB host controllers implement their registers and + * in-memory communication descriptors in little-endian format, + * a minority (notably the IBM STB04XXX and the Motorola MPC5200 + * processors) implement them in big endian format. + * + * In addition some more exotic implementations like the Toshiba + * Spider (aka SCC) cell southbridge are "mixed" endian, that is, + * they have a different endianness for registers vs. in-memory + * descriptors. + * + * This attempts to support either format at compile time without a + * runtime penalty, or both formats with the additional overhead + * of checking a flag bit. + * + * That leads to some tricky Kconfig rules howevber. There are + * different defaults based on some arch/ppc platforms, though + * the basic rules are: + * + * Controller type Kconfig options needed + * --------------- ---------------------- + * little endian CONFIG_USB_ADMHC_LITTLE_ENDIAN + * + * fully big endian CONFIG_USB_ADMHC_BIG_ENDIAN_DESC _and_ + * CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO + * + * mixed endian CONFIG_USB_ADMHC_LITTLE_ENDIAN _and_ + * CONFIG_USB_OHCI_BIG_ENDIAN_{MMIO,DESC} + * + * (If you have a mixed endian controller, you -must- also define + * CONFIG_USB_ADMHC_LITTLE_ENDIAN or things will not work when building + * both your mixed endian and a fully big endian controller support in + * the same kernel image). + */ + +#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_DESC +#ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN +#define big_endian_desc(ahcd) (ahcd->flags & OHCI_QUIRK_BE_DESC) +#else +#define big_endian_desc(ahcd) 1 /* only big endian */ +#endif +#else +#define big_endian_desc(ahcd) 0 /* only little endian */ +#endif + +#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO +#ifdef CONFIG_USB_ADMHC_LITTLE_ENDIAN +#define big_endian_mmio(ahcd) (ahcd->flags & OHCI_QUIRK_BE_MMIO) +#else +#define big_endian_mmio(ahcd) 1 /* only big endian */ +#endif +#else +#define big_endian_mmio(ahcd) 0 /* only little endian */ +#endif + +/* + * Big-endian read/write functions are arch-specific. + * Other arches can be added if/when they're needed. + * + */ +static inline unsigned int admhc_readl(const struct admhcd *ahcd, + __hc32 __iomem *regs) +{ +#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO + return big_endian_mmio(ahcd) ? + readl_be(regs) : + readl(regs); +#else + return readl(regs); +#endif +} + +static inline void admhc_writel(const struct admhcd *ahcd, + const unsigned int val, __hc32 __iomem *regs) +{ +#ifdef CONFIG_USB_ADMHC_BIG_ENDIAN_MMIO + big_endian_mmio(ahcd) ? + writel_be(val, regs) : + writel(val, regs); +#else + writel(val, regs); +#endif +} + +static inline void admhc_writel_flush(const struct admhcd *ahcd) +{ +#if 0 + /* TODO: remove? */ + (void) admhc_readl(ahcd, &ahcd->regs->gencontrol); +#endif +} + + +/*-------------------------------------------------------------------------*/ + +/* cpu to ahcd */ +static inline __hc16 cpu_to_hc16(const struct admhcd *ahcd, const u16 x) +{ + return big_endian_desc(ahcd) ? + (__force __hc16)cpu_to_be16(x) : + (__force __hc16)cpu_to_le16(x); +} + +static inline __hc16 cpu_to_hc16p(const struct admhcd *ahcd, const u16 *x) +{ + return big_endian_desc(ahcd) ? + cpu_to_be16p(x) : + cpu_to_le16p(x); +} + +static inline __hc32 cpu_to_hc32(const struct admhcd *ahcd, const u32 x) +{ + return big_endian_desc(ahcd) ? + (__force __hc32)cpu_to_be32(x) : + (__force __hc32)cpu_to_le32(x); +} + +static inline __hc32 cpu_to_hc32p(const struct admhcd *ahcd, const u32 *x) +{ + return big_endian_desc(ahcd) ? + cpu_to_be32p(x) : + cpu_to_le32p(x); +} + +/* ahcd to cpu */ +static inline u16 hc16_to_cpu(const struct admhcd *ahcd, const __hc16 x) +{ + return big_endian_desc(ahcd) ? + be16_to_cpu((__force __be16)x) : + le16_to_cpu((__force __le16)x); +} + +static inline u16 hc16_to_cpup(const struct admhcd *ahcd, const __hc16 *x) +{ + return big_endian_desc(ahcd) ? + be16_to_cpup((__force __be16 *)x) : + le16_to_cpup((__force __le16 *)x); +} + +static inline u32 hc32_to_cpu(const struct admhcd *ahcd, const __hc32 x) +{ + return big_endian_desc(ahcd) ? + be32_to_cpu((__force __be32)x) : + le32_to_cpu((__force __le32)x); +} + +static inline u32 hc32_to_cpup(const struct admhcd *ahcd, const __hc32 *x) +{ + return big_endian_desc(ahcd) ? + be32_to_cpup((__force __be32 *)x) : + le32_to_cpup((__force __le32 *)x); +} + +/*-------------------------------------------------------------------------*/ + +static inline u16 admhc_frame_no(const struct admhcd *ahcd) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->fmnumber) & ADMHC_SFN_FN_MASK; + return (u16)t; +} + +static inline u16 admhc_frame_remain(const struct admhcd *ahcd) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->fmnumber) >> ADMHC_SFN_FR_SHIFT; + t &= ADMHC_SFN_FR_MASK; + return (u16)t; +} + +/*-------------------------------------------------------------------------*/ + +static inline void admhc_disable(struct admhcd *ahcd) +{ + admhcd_to_hcd(ahcd)->state = HC_STATE_HALT; +} + +#define FI 0x2edf /* 12000 bits per frame (-1) */ +#define FSLDP(fi) (0x7fff & ((6 * ((fi) - 1200)) / 7)) +#define FIT ADMHC_SFI_FIT +#define LSTHRESH 0x628 /* lowspeed bit threshold */ + +static inline void periodic_reinit(struct admhcd *ahcd) +{ +#if 0 + u32 fi = ahcd->fminterval & ADMHC_SFI_FI_MASK; + u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT; + + /* TODO: adjust FSLargestDataPacket value too? */ + admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval, + &ahcd->regs->fminterval); +#else + u32 fit = admhc_readl(ahcd, &ahcd->regs->fminterval) & FIT; + + /* TODO: adjust FSLargestDataPacket value too? */ + admhc_writel(ahcd, (fit ^ FIT) | ahcd->fminterval, + &ahcd->regs->fminterval); +#endif +} + +static inline u32 admhc_read_rhdesc(struct admhcd *ahcd) +{ + return admhc_readl(ahcd, &ahcd->regs->rhdesc); +} + +static inline u32 admhc_read_portstatus(struct admhcd *ahcd, int port) +{ + return admhc_readl(ahcd, &ahcd->regs->portstatus[port]); +} + +static inline void admhc_write_portstatus(struct admhcd *ahcd, int port, + u32 value) +{ + admhc_writel(ahcd, value, &ahcd->regs->portstatus[port]); +} + +static inline void roothub_write_status(struct admhcd *ahcd, u32 value) +{ + /* FIXME: read-only bits must be masked out */ + admhc_writel(ahcd, value, &ahcd->regs->rhdesc); +} + +static inline void admhc_intr_disable(struct admhcd *ahcd, u32 ints) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->int_enable); + t &= ~(ints); + admhc_writel(ahcd, t, &ahcd->regs->int_enable); + /* TODO: flush writes ?*/ +} + +static inline void admhc_intr_enable(struct admhcd *ahcd, u32 ints) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->int_enable); + t |= ints; + admhc_writel(ahcd, t, &ahcd->regs->int_enable); + /* TODO: flush writes ?*/ +} + +static inline void admhc_intr_ack(struct admhcd *ahcd, u32 ints) +{ + admhc_writel(ahcd, ints, &ahcd->regs->int_status); +} + +static inline void admhc_dma_enable(struct admhcd *ahcd) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->host_control); + if (t & ADMHC_HC_DMAE) + return; + + t |= ADMHC_HC_DMAE; + admhc_writel(ahcd, t, &ahcd->regs->host_control); + admhc_vdbg(ahcd, "DMA enabled\n"); +} + +static inline void admhc_dma_disable(struct admhcd *ahcd) +{ + u32 t; + + t = admhc_readl(ahcd, &ahcd->regs->host_control); + if (!(t & ADMHC_HC_DMAE)) + return; + + t &= ~ADMHC_HC_DMAE; + admhc_writel(ahcd, t, &ahcd->regs->host_control); + admhc_vdbg(ahcd, "DMA disabled\n"); +} diff --git a/target/linux/adm5120/files-3.18/drivers/watchdog/adm5120_wdt.c b/target/linux/adm5120/files-3.18/drivers/watchdog/adm5120_wdt.c new file mode 100644 index 0000000..d5d63b2 --- /dev/null +++ b/target/linux/adm5120/files-3.18/drivers/watchdog/adm5120_wdt.c @@ -0,0 +1,202 @@ +/* + * ADM5120_WDT 0.01: Infineon ADM5120 SoC watchdog driver + * Copyright (c) Ondrej Zajicek <santiago@crfreenet.org>, 2007 + * + * based on + * + * RC32434_WDT 0.01: IDT Interprise 79RC32434 watchdog driver + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + */ +#include <linux/module.h> +#include <linux/types.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> +#include <linux/watchdog.h> +#include <linux/irq.h> + +#include <asm/bootinfo.h> + +#include <asm/mach-adm5120/adm5120_info.h> +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_switch.h> + +#define DEFAULT_TIMEOUT 15 /* (secs) Default is 15 seconds */ +#define MAX_TIMEOUT 327 +/* Max is 327 seconds, counter is 15-bit integer, step is 10 ms */ + +#define NAME "adm5120_wdt" +#define VERSION "0.1" + +static int expect_close; +static int access; +static unsigned int timeout = DEFAULT_TIMEOUT; + +static int nowayout = WATCHDOG_NOWAYOUT; +module_param(nowayout, int, 0); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +MODULE_LICENSE("GPL"); + + +static inline void wdt_set_timeout(void) +{ + u32 val = (1 << 31) | (((timeout * 100) & 0x7FFF) << 16); + SW_WRITE_REG(SWITCH_REG_WDOG0, val); +} + +/* + It looks like WDOG0-register-write don't modify counter, + but WDOG0-register-read resets counter. +*/ + +static inline void wdt_reset_counter(void) +{ + SW_READ_REG(SWITCH_REG_WDOG0); +} + +static inline void wdt_disable(void) +{ + SW_WRITE_REG(SWITCH_REG_WDOG0, 0x7FFF0000); +} + + + +static int wdt_open(struct inode *inode, struct file *file) +{ + /* Allow only one person to hold it open */ + if (access) + return -EBUSY; + + if (nowayout) + __module_get(THIS_MODULE); + + /* Activate timer */ + wdt_reset_counter(); + wdt_set_timeout(); + printk(KERN_INFO NAME ": enabling watchdog timer\n"); + access = 1; + return 0; +} + +static int wdt_release(struct inode *inode, struct file *file) +{ + /* + * Shut off the timer. + * Lock it in if it's a module and we set nowayout + */ + if (expect_close && (nowayout == 0)) { + wdt_disable(); + printk(KERN_INFO NAME ": disabling watchdog timer\n"); + module_put(THIS_MODULE); + } else + printk(KERN_CRIT NAME ": device closed unexpectedly. WDT will not stop!\n"); + + access = 0; + return 0; +} + +static ssize_t wdt_write(struct file *file, const char *data, size_t len, loff_t *ppos) +{ + /* Refresh the timer. */ + if (len) { + if (!nowayout) { + size_t i; + + /* In case it was set long ago */ + expect_close = 0; + + for (i = 0; i != len; i++) { + char c; + if (get_user(c, data + i)) + return -EFAULT; + if (c == 'V') + expect_close = 1; + } + } + wdt_reset_counter(); + return len; + } + return 0; +} + +static long wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) +{ + int new_timeout; + static struct watchdog_info ident = { + .options = WDIOF_SETTIMEOUT | + WDIOF_KEEPALIVEPING | + WDIOF_MAGICCLOSE, + .firmware_version = 0, + .identity = "ADM5120_WDT Watchdog", + }; + switch (cmd) { + default: + return -ENOTTY; + case WDIOC_GETSUPPORT: + if (copy_to_user((struct watchdog_info *)arg, &ident, sizeof(ident))) + return -EFAULT; + return 0; + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, (int *)arg); + case WDIOC_KEEPALIVE: + wdt_reset_counter(); + return 0; + case WDIOC_SETTIMEOUT: + if (get_user(new_timeout, (int *)arg)) + return -EFAULT; + if (new_timeout < 1) + return -EINVAL; + if (new_timeout > MAX_TIMEOUT) + return -EINVAL; + timeout = new_timeout; + wdt_set_timeout(); + /* Fall */ + case WDIOC_GETTIMEOUT: + return put_user(timeout, (int *)arg); + } +} + +static const struct file_operations wdt_fops = { + .owner = THIS_MODULE, + .llseek = no_llseek, + .write = wdt_write, + .unlocked_ioctl = wdt_ioctl, + .open = wdt_open, + .release = wdt_release, +}; + +static struct miscdevice wdt_miscdev = { + .minor = WATCHDOG_MINOR, + .name = "watchdog", + .fops = &wdt_fops, +}; + +static char banner[] __initdata = KERN_INFO NAME ": Watchdog Timer version " VERSION "\n"; + +static int __init watchdog_init(void) +{ + int ret; + + ret = misc_register(&wdt_miscdev); + + if (ret) + return ret; + + wdt_disable(); + printk(banner); + + return 0; +} + +static void __exit watchdog_exit(void) +{ + misc_deregister(&wdt_miscdev); +} + +module_init(watchdog_init); +module_exit(watchdog_exit); |