diff options
author | Gabor Juhos <juhosg@openwrt.org> | 2007-07-11 13:00:27 +0000 |
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committer | Gabor Juhos <juhosg@openwrt.org> | 2007-07-11 13:00:27 +0000 |
commit | 4db7fa1c06f3c3681e6ae8aad75e4a1997445023 (patch) | |
tree | 258d226f6ffa46cc4ec4888a827f2399dcf16403 /target/linux/adm5120-2.6/files/drivers/mtd | |
parent | be6a41df04fe310ded95d38fa984a3226e47866e (diff) | |
download | upstream-4db7fa1c06f3c3681e6ae8aad75e4a1997445023.tar.gz upstream-4db7fa1c06f3c3681e6ae8aad75e4a1997445023.tar.bz2 upstream-4db7fa1c06f3c3681e6ae8aad75e4a1997445023.zip |
refactor kernel code (part 1), mark it as broken now
SVN-Revision: 7916
Diffstat (limited to 'target/linux/adm5120-2.6/files/drivers/mtd')
-rw-r--r-- | target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120-flash.c | 572 | ||||
-rw-r--r-- | target/linux/adm5120-2.6/files/drivers/mtd/myloader.c | 22 |
2 files changed, 584 insertions, 10 deletions
diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120-flash.c b/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120-flash.c new file mode 100644 index 0000000000..a60e6e54bc --- /dev/null +++ b/target/linux/adm5120-2.6/files/drivers/mtd/maps/adm5120-flash.c @@ -0,0 +1,572 @@ +/* + * $Id$ + * + * Platform driver for NOR flash devices on ADM5120 based boards + * + * Copyright (C) 2007 OpenWrt.org + * Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu> + * + * 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 + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/slab.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/io.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 + +#define MAP_DBG(m, f, a...) printk(KERN_DEBUG "%s: " f, (m->name) , ## a) +#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 chip_size; +}; + +struct adm5120_flash_info { + struct mtd_info *mtd; + struct resource *res; + struct platform_device *dev; + struct adm5120_map_info amap; +#ifdef CONFIG_MTD_PARTITIONS + int nr_parts; + struct mtd_partition *parts[MAX_PARSED_PARTS]; +#endif +}; + +struct flash_desc { + u32 phys; + u32 srs_shift; + u32 mpmc_reg; +}; + +/* + * 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, + .mpmc_reg = MPMC_REG_SC1, + .srs_shift = MEMCTRL_SRS0_SHIFT, + }, { + .phys = ADM5120_SRAM1_BASE, + .mpmc_reg = MPMC_REG_SC0, + .srs_shift = MEMCTRL_SRS1_SHIFT, + } +}; + +static const char *probe_types[] = { + "cfi_probe", + "jedec_probe", + "map_rom", + NULL +}; + +#ifdef CONFIG_MTD_PARTITIONS +static const char *parse_types[] = { + "cmdlinepart", +#ifdef CONFIG_MTD_REDBOOT_PARTS + "RedBoot", +#endif +#ifdef CONFIG_MTD_MYLOADER_PARTS + "MyLoader", +#endif +}; +#endif + +#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, "ofs=%lu, switching to bank %u\n", ofs, bank); + 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 %lu\n", ofs); + + if (ofs >= amap->chip_size) + return map_word_ff(map); + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + ret = inline_map_read(map, (ofs & BANK_OFFS_MASK)); + 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 %lu\n", ofs); + + if (ofs > amap->chip_size) + return; + + FLASH_LOCK(); + adm5120_flash_switchbank(map, ofs); + inline_map_write(map, datum, (ofs & BANK_OFFS_MASK)); + 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, "copying %lu byte(s) from %lu to %lX\n", + (unsigned long)len, from, (unsigned long)to); + + if (from > amap->chip_size) + return; + + p = (char *)to; + while (len > 0) { + if (len > BANK_SIZE - (from & BANK_OFFS_MASK)) + t = BANK_SIZE - (from & BANK_OFFS_MASK); + else + t = len; + + MAP_DBG(map, "copying %lu byte(s) from %lu to %lX\n", + (unsigned long)t, (from & BANK_OFFS_MASK), + (unsigned long)p); + + FLASH_LOCK(); + adm5120_flash_switchbank(map, from); + inline_map_copy_from(map, to, (from & BANK_OFFS_MASK), 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, map->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, map->size); + if (map->virt == NULL) { + MAP_ERR(map, "failed to ioremap flash region\n"); + err = -ENOMEM; + goto out; + } + +out: + return err; +} + +#define SWITCH_READ(r) *(u32 *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+(r)) +#define SWITCH_WRITE(r,v) *(u32 *)(KSEG1ADDR(ADM5120_SWITCH_BASE)+(r))=(v) +#define MPMC_READ(r) *(u32 *)(KSEG1ADDR(ADM5120_MPMC_BASE)+(r)) +#define MPMC_WRITE(r,v) *(u32 *)(KSEG1ADDR(ADM5120_MPMC_BASE)+(r))=(v) + +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; + + map->name = dev->dev.bus_id; + + if (dev->id > 1) { + MAP_ERR(map, "invalid flash id\n"); + goto err_out; + } + + fdesc = &flash_descs[dev->id]; + + /* get memory window size */ + t = SWITCH_READ(SWITCH_REG_MEMCTRL) >> fdesc->srs_shift; + t &= MEMCTRL_SRS_MASK; + info->amap.chip_size = flash_sizes[t]; + if (info->amap.chip_size == 0) { + MAP_ERR(map, "invalid flash size detected\n"); + goto err_out; + } + + /* get flash bus width */ + t = MPMC_READ(fdesc->mpmc_reg) & SC_MW_MASK; + 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.chip_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.chip_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.chip_size; +} + +#ifdef CONFIG_MTD_PARTITIONS +static int adm5120_flash_initparts(struct adm5120_flash_info *info) +{ + struct adm5120_flash_platform_data *pdata = info->dev->dev.platform_data; + struct map_info *map = &info->amap.map; + int num_parsers; + const char *parser[2]; + int err = 0; + int nr_parts; + int i; + + info->nr_parts = 0; + + if (pdata == NULL) + goto out; + + if (pdata->nr_parts) { + MAP_INFO(map, "adding static partitions\n"); + err = add_mtd_partitions(info->mtd, pdata->parts, + pdata->nr_parts); + if (err == 0) { + info->nr_parts += pdata->nr_parts; + goto out; + } + } + + num_parsers = ARRAY_SIZE(parse_types); + if (num_parsers > MAX_PARSED_PARTS) + num_parsers = MAX_PARSED_PARTS; + + parser[1] = NULL; + for (i=0; i<num_parsers; i++) { + parser[0] = parse_types[i]; + + MAP_INFO(map, "parsing \"%s\" partitions\n", + parser[0]); + nr_parts = parse_mtd_partitions(info->mtd, parser, + &info->parts[i], 0); + + if (nr_parts <= 0) + continue; + + MAP_INFO(map, "adding \"%s\" partitions\n", + parser[0]); + + err = add_mtd_partitions(info->mtd, info->parts[i], nr_parts); + if (err) + break; + + info->nr_parts += nr_parts; + } +out: + return err; +} +#else +static int adm5120_flash_initparts(struct adm5120_flash_info *info) +{ + return 0; +} +#endif /* CONFIG_MTD_PARTITIONS */ + +#ifdef CONFIG_MTD_PARTITIONS +static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info) +{ + int i; + + if (info->nr_parts) { + del_mtd_partitions(info->mtd); + for (i=0; i<MAX_PARSED_PARTS; i++) + if (info->parts[i] != NULL) + kfree(info->parts[i]); + } else { + del_mtd_device(info->mtd); + } +} +#else +static void adm5120_flash_remove_mtd(struct adm5120_flash_info *info) +{ + del_mtd_device(info->mtd); +} +#endif + +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) { + adm5120_flash_remove_mtd(info); + 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_info *info; + struct map_info *map; + const char **probe_type; + int err; + + 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.chip_size) { + /* readjust resources */ + iounmap(map->virt); + release_resource(info->res); + kfree(info->res); + + info->amap.chip_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)map->size >> 10, + map->bankwidth*8); + + info->mtd->owner = THIS_MODULE; + + err = adm5120_flash_initparts(info); + if (err) + goto err_out; + + if (info->nr_parts == 0) { + MAP_INFO(map, "no partitions available, registering whole flash\n"); + add_mtd_device(info->mtd); + } + + 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"); +MODULE_AUTHOR("Gabor Juhos <juhosg@freemail.hu>"); +MODULE_DESCRIPTION(DRV_DESC); diff --git a/target/linux/adm5120-2.6/files/drivers/mtd/myloader.c b/target/linux/adm5120-2.6/files/drivers/mtd/myloader.c index ee916d7800..222245cc9c 100644 --- a/target/linux/adm5120-2.6/files/drivers/mtd/myloader.c +++ b/target/linux/adm5120-2.6/files/drivers/mtd/myloader.c @@ -1,4 +1,6 @@ /* + * $Id$ + * * Parse MyLoader-style flash partition tables and produce a Linux partition * array to match. * @@ -33,7 +35,8 @@ #include <linux/mtd/partitions.h> #include <linux/byteorder/generic.h> -#include <asm/mach-adm5120/myloader.h> + +#include <prom/myloader.h> #define NAME_LEN_MAX 20 #define NAME_MYLOADER "MyLoader" @@ -68,12 +71,10 @@ int parse_myloader_partitions(struct mtd_info *master, /* Partition Table is always located on the second erase block */ offset = blocklen; - printk(KERN_NOTICE "Searching for MyLoader partition table " - "in %s at offset 0x%lx\n", master->name, offset); - - ret = master->read(master, offset, sizeof(*tab), &retlen, - (void *)tab); + printk(KERN_NOTICE "%s: searching for MyLoader partition table at " + "offset 0x%lx\n", master->name, offset); + ret = master->read(master, offset, sizeof(*tab), &retlen, (void *)tab); if (ret) goto out; @@ -84,8 +85,8 @@ int parse_myloader_partitions(struct mtd_info *master, /* Check for Partition Table magic number */ if (tab->magic != le32_to_cpu(MYLO_MAGIC_PARTITIONS)) { - printk(KERN_NOTICE "No MyLoader partition table detected " - "in %s\n", master->name); + printk(KERN_NOTICE "%s: no MyLoader partition table found\n", + master->name); ret = 0; goto out_free_buf; } @@ -103,7 +104,6 @@ int parse_myloader_partitions(struct mtd_info *master, num_parts++; } - mtd_parts = kzalloc((num_parts*sizeof(*mtd_part) + num_parts*NAME_LEN_MAX), GFP_KERNEL); @@ -119,6 +119,7 @@ int parse_myloader_partitions(struct mtd_info *master, mtd_part->name = names; mtd_part->offset = 0; mtd_part->size = blocklen; + mtd_part->mask_flags = MTD_WRITEABLE; mtd_part++; names += NAME_LEN_MAX; @@ -126,6 +127,7 @@ int parse_myloader_partitions(struct mtd_info *master, mtd_part->name = names; mtd_part->offset = blocklen; mtd_part->size = blocklen; + mtd_part->mask_flags = MTD_WRITEABLE; mtd_part++; names += NAME_LEN_MAX; @@ -136,9 +138,9 @@ int parse_myloader_partitions(struct mtd_info *master, continue; sprintf(names, "partition%d", i); - mtd_part->name = names; mtd_part->offset = le32_to_cpu(part->addr); mtd_part->size = le32_to_cpu(part->size); + mtd_part->name = names; mtd_part++; names += NAME_LEN_MAX; } |