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author | Felix Fietkau <nbd@openwrt.org> | 2009-06-14 20:42:33 +0000 |
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committer | Felix Fietkau <nbd@openwrt.org> | 2009-06-14 20:42:33 +0000 |
commit | 2d5f80251c73e1e44c8fdd047ef49dbe051d65aa (patch) | |
tree | 74597f2d6eef2e7a6d6338c978b8910f9f947151 /target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch | |
parent | 157a4ab64660aaca2dd51fa4f82239d3738a1dff (diff) | |
download | master-187ad058-2d5f80251c73e1e44c8fdd047ef49dbe051d65aa.tar.gz master-187ad058-2d5f80251c73e1e44c8fdd047ef49dbe051d65aa.tar.bz2 master-187ad058-2d5f80251c73e1e44c8fdd047ef49dbe051d65aa.zip |
add the 'goldfish' target, useful for experimenting with virtual phone hardware (includes the emulator)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16459 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch')
-rw-r--r-- | target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch | 368 |
1 files changed, 368 insertions, 0 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch b/target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch new file mode 100644 index 0000000000..e8767e6bdd --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0122--ARM-goldfish-tty-Adding-tty-driver-for-goldfish.patch @@ -0,0 +1,368 @@ +From 4ff5a10b94c0c41088c8bbfa5be1ebab3822371b Mon Sep 17 00:00:00 2001 +From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com> +Date: Fri, 29 Jun 2007 21:41:20 -0700 +Subject: [PATCH 122/134] [ARM] goldfish: tty: Adding tty driver for goldfish. +MIME-Version: 1.0 +Content-Type: text/plain; charset=utf-8 +Content-Transfer-Encoding: 8bit + +Signed-off-by: Mike A. Chan <mikechan@google.com> +Signed-off-by: Arve Hjønnevåg <arve@android.com> +--- + drivers/char/Kconfig | 6 + + drivers/char/Makefile | 1 + + drivers/char/goldfish_tty.c | 323 +++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 330 insertions(+), 0 deletions(-) + create mode 100644 drivers/char/goldfish_tty.c + +--- a/drivers/char/Kconfig ++++ b/drivers/char/Kconfig +@@ -1106,6 +1106,12 @@ config DEVPORT + depends on ISA || PCI + default y + ++config GOLDFISH_TTY ++ tristate "Goldfish TTY Driver" ++ default n ++ help ++ TTY driver for Goldfish Virtual Platform. ++ + source "drivers/s390/char/Kconfig" + + endmenu +--- a/drivers/char/Makefile ++++ b/drivers/char/Makefile +@@ -98,6 +98,7 @@ obj-$(CONFIG_GPIO_DEVICE) += gpio_dev.o + obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o + obj-$(CONFIG_GPIO_TB0219) += tb0219.o + obj-$(CONFIG_TELCLOCK) += tlclk.o ++obj-$(CONFIG_GOLDFISH_TTY) += goldfish_tty.o + + obj-$(CONFIG_MWAVE) += mwave/ + obj-$(CONFIG_AGP) += agp/ +--- /dev/null ++++ b/drivers/char/goldfish_tty.c +@@ -0,0 +1,323 @@ ++/* drivers/char/goldfish_tty.c ++** ++** Copyright (C) 2007 Google, Inc. ++** ++** This software is licensed under the terms of the GNU General Public ++** License version 2, as published by the Free Software Foundation, and ++** may be copied, distributed, and modified under those terms. ++** ++** 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. ++** ++*/ ++ ++#include <linux/console.h> ++#include <linux/init.h> ++#include <linux/interrupt.h> ++#include <linux/platform_device.h> ++#include <linux/tty.h> ++#include <linux/tty_flip.h> ++ ++#include <mach/hardware.h> ++#include <asm/io.h> ++ ++enum { ++ GOLDFISH_TTY_PUT_CHAR = 0x00, ++ GOLDFISH_TTY_BYTES_READY = 0x04, ++ GOLDFISH_TTY_CMD = 0x08, ++ ++ GOLDFISH_TTY_DATA_PTR = 0x10, ++ GOLDFISH_TTY_DATA_LEN = 0x14, ++ ++ GOLDFISH_TTY_CMD_INT_DISABLE = 0, ++ GOLDFISH_TTY_CMD_INT_ENABLE = 1, ++ GOLDFISH_TTY_CMD_WRITE_BUFFER = 2, ++ GOLDFISH_TTY_CMD_READ_BUFFER = 3, ++}; ++ ++struct goldfish_tty { ++ spinlock_t lock; ++ uint32_t base; ++ uint32_t irq; ++ int opencount; ++ struct tty_struct *tty; ++ struct console console; ++}; ++ ++static DEFINE_MUTEX(goldfish_tty_lock); ++static struct tty_driver *goldfish_tty_driver; ++static uint32_t goldfish_tty_line_count = 8; ++static uint32_t goldfish_tty_current_line_count; ++static struct goldfish_tty *goldfish_ttys; ++ ++static void goldfish_tty_do_write(int line, const char *buf, unsigned count) ++{ ++ unsigned long irq_flags; ++ struct goldfish_tty *qtty = &goldfish_ttys[line]; ++ uint32_t base = qtty->base; ++ spin_lock_irqsave(&qtty->lock, irq_flags); ++ writel(buf, base + GOLDFISH_TTY_DATA_PTR); ++ writel(count, base + GOLDFISH_TTY_DATA_LEN); ++ writel(GOLDFISH_TTY_CMD_WRITE_BUFFER, base + GOLDFISH_TTY_CMD); ++ spin_unlock_irqrestore(&qtty->lock, irq_flags); ++} ++ ++static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id) ++{ ++ struct platform_device *pdev = dev_id; ++ struct goldfish_tty *qtty = &goldfish_ttys[pdev->id]; ++ uint32_t base = qtty->base; ++ unsigned long irq_flags; ++ unsigned char *buf; ++ uint32_t count; ++ ++ count = readl(base + GOLDFISH_TTY_BYTES_READY); ++ if(count == 0) { ++ return IRQ_NONE; ++ } ++ count = tty_prepare_flip_string(qtty->tty, &buf, count); ++ spin_lock_irqsave(&qtty->lock, irq_flags); ++ writel(buf, base + GOLDFISH_TTY_DATA_PTR); ++ writel(count, base + GOLDFISH_TTY_DATA_LEN); ++ writel(GOLDFISH_TTY_CMD_READ_BUFFER, base + GOLDFISH_TTY_CMD); ++ spin_unlock_irqrestore(&qtty->lock, irq_flags); ++ tty_schedule_flip(qtty->tty); ++ return IRQ_HANDLED; ++} ++ ++static int goldfish_tty_open(struct tty_struct * tty, struct file * filp) ++{ ++ int ret; ++ struct goldfish_tty *qtty = &goldfish_ttys[tty->index]; ++ ++ mutex_lock(&goldfish_tty_lock); ++ if(qtty->tty == NULL || qtty->tty == tty) { ++ if(qtty->opencount++ == 0) { ++ qtty->tty = tty; ++ writel(GOLDFISH_TTY_CMD_INT_ENABLE, qtty->base + GOLDFISH_TTY_CMD); ++ } ++ ret = 0; ++ } ++ else ++ ret = -EBUSY; ++ mutex_unlock(&goldfish_tty_lock); ++ return ret; ++} ++ ++static void goldfish_tty_close(struct tty_struct * tty, struct file * filp) ++{ ++ struct goldfish_tty *qtty = &goldfish_ttys[tty->index]; ++ ++ mutex_lock(&goldfish_tty_lock); ++ if(qtty->tty == tty) { ++ if(--qtty->opencount == 0) { ++ writel(GOLDFISH_TTY_CMD_INT_DISABLE, qtty->base + GOLDFISH_TTY_CMD); ++ qtty->tty = NULL; ++ } ++ } ++ mutex_unlock(&goldfish_tty_lock); ++} ++ ++static int goldfish_tty_write(struct tty_struct * tty, const unsigned char *buf, int count) ++{ ++ goldfish_tty_do_write(tty->index, buf, count); ++ return count; ++} ++ ++static int goldfish_tty_write_room(struct tty_struct *tty) ++{ ++ return 0x10000; ++} ++ ++static int goldfish_tty_chars_in_buffer(struct tty_struct *tty) ++{ ++ struct goldfish_tty *qtty = &goldfish_ttys[tty->index]; ++ uint32_t base = qtty->base; ++ return readl(base + GOLDFISH_TTY_BYTES_READY); ++} ++ ++static void goldfish_tty_console_write(struct console *co, const char *b, unsigned count) ++{ ++ goldfish_tty_do_write(co->index, b, count); ++} ++ ++static struct tty_driver *goldfish_tty_console_device(struct console *c, int *index) ++{ ++ *index = c->index; ++ return goldfish_tty_driver; ++} ++ ++static int goldfish_tty_console_setup(struct console *co, char *options) ++{ ++ if((unsigned)co->index > goldfish_tty_line_count) ++ return -ENODEV; ++ if(goldfish_ttys[co->index].base == 0) ++ return -ENODEV; ++ return 0; ++} ++ ++static struct tty_operations goldfish_tty_ops = { ++ .open = goldfish_tty_open, ++ .close = goldfish_tty_close, ++ .write = goldfish_tty_write, ++ .write_room = goldfish_tty_write_room, ++ .chars_in_buffer = goldfish_tty_chars_in_buffer, ++}; ++ ++static int __devinit goldfish_tty_create_driver(void) ++{ ++ int ret; ++ struct tty_driver *tty; ++ ++ goldfish_ttys = kzalloc(sizeof(*goldfish_ttys) * goldfish_tty_line_count, GFP_KERNEL); ++ if(goldfish_ttys == NULL) { ++ ret = -ENOMEM; ++ goto err_alloc_goldfish_ttys_failed; ++ } ++ ++ tty = alloc_tty_driver(goldfish_tty_line_count); ++ if(tty == NULL) { ++ ret = -ENOMEM; ++ goto err_alloc_tty_driver_failed; ++ } ++ tty->driver_name = "goldfish"; ++ tty->name = "ttyS"; ++ tty->type = TTY_DRIVER_TYPE_SERIAL; ++ tty->subtype = SERIAL_TYPE_NORMAL; ++ tty->init_termios = tty_std_termios; ++ tty->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; ++ tty_set_operations(tty, &goldfish_tty_ops); ++ ret = tty_register_driver(tty); ++ if(ret) ++ goto err_tty_register_driver_failed; ++ ++ goldfish_tty_driver = tty; ++ return 0; ++ ++err_tty_register_driver_failed: ++ put_tty_driver(tty); ++err_alloc_tty_driver_failed: ++ kfree(goldfish_ttys); ++ goldfish_ttys = NULL; ++err_alloc_goldfish_ttys_failed: ++ return ret; ++} ++ ++static void goldfish_tty_delete_driver(void) ++{ ++ tty_unregister_driver(goldfish_tty_driver); ++ put_tty_driver(goldfish_tty_driver); ++ goldfish_tty_driver = NULL; ++ kfree(goldfish_ttys); ++ goldfish_ttys = NULL; ++} ++ ++static int __devinit goldfish_tty_probe(struct platform_device *pdev) ++{ ++ int ret; ++ int i; ++ struct resource *r; ++ struct device *ttydev; ++ uint32_t base; ++ uint32_t irq; ++ ++ r = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ if(r == NULL) ++ return -EINVAL; ++ base = IO_ADDRESS(r->start - IO_START); ++ r = platform_get_resource(pdev, IORESOURCE_IRQ, 0); ++ if(r == NULL) ++ return -EINVAL; ++ irq = r->start; ++ ++ if(pdev->id >= goldfish_tty_line_count) ++ return -EINVAL; ++ ++ mutex_lock(&goldfish_tty_lock); ++ if(goldfish_tty_current_line_count == 0) { ++ ret = goldfish_tty_create_driver(); ++ if(ret) ++ goto err_create_driver_failed; ++ } ++ goldfish_tty_current_line_count++; ++ ++ spin_lock_init(&goldfish_ttys[pdev->id].lock); ++ goldfish_ttys[pdev->id].base = base; ++ goldfish_ttys[pdev->id].irq = irq; ++ ++ writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_CMD); ++ ++ ret = request_irq(irq, goldfish_tty_interrupt, IRQF_SHARED, "goldfish_tty", pdev); ++ if(ret) ++ goto err_request_irq_failed; ++ ++ ++ ttydev = tty_register_device(goldfish_tty_driver, pdev->id, NULL); ++ if(IS_ERR(ttydev)) { ++ ret = PTR_ERR(ttydev); ++ goto err_tty_register_device_failed; ++ } ++ ++ strcpy(goldfish_ttys[pdev->id].console.name, "ttyS"); ++ goldfish_ttys[pdev->id].console.write = goldfish_tty_console_write; ++ goldfish_ttys[pdev->id].console.device = goldfish_tty_console_device; ++ goldfish_ttys[pdev->id].console.setup = goldfish_tty_console_setup; ++ goldfish_ttys[pdev->id].console.flags = CON_PRINTBUFFER; ++ goldfish_ttys[pdev->id].console.index = pdev->id; ++ register_console(&goldfish_ttys[pdev->id].console); ++ ++ ++ mutex_unlock(&goldfish_tty_lock); ++ ++ return 0; ++ ++ tty_unregister_device(goldfish_tty_driver, i); ++err_tty_register_device_failed: ++ free_irq(irq, pdev); ++err_request_irq_failed: ++ goldfish_tty_current_line_count--; ++ if(goldfish_tty_current_line_count == 0) { ++ goldfish_tty_delete_driver(); ++ } ++err_create_driver_failed: ++ mutex_unlock(&goldfish_tty_lock); ++ return ret; ++} ++ ++static int __devexit goldfish_tty_remove(struct platform_device *pdev) ++{ ++ mutex_lock(&goldfish_tty_lock); ++ unregister_console(&goldfish_ttys[pdev->id].console); ++ tty_unregister_device(goldfish_tty_driver, pdev->id); ++ goldfish_ttys[pdev->id].base = 0; ++ free_irq(goldfish_ttys[pdev->id].irq, pdev); ++ goldfish_tty_current_line_count--; ++ if(goldfish_tty_current_line_count == 0) { ++ goldfish_tty_delete_driver(); ++ } ++ mutex_unlock(&goldfish_tty_lock); ++ return 0; ++} ++ ++static struct platform_driver goldfish_tty_platform_driver = { ++ .probe = goldfish_tty_probe, ++ .remove = __devexit_p(goldfish_tty_remove), ++ .driver = { ++ .name = "goldfish_tty" ++ } ++}; ++ ++static int __init goldfish_tty_init(void) ++{ ++ return platform_driver_register(&goldfish_tty_platform_driver); ++} ++ ++static void __exit goldfish_tty_exit(void) ++{ ++ platform_driver_unregister(&goldfish_tty_platform_driver); ++} ++ ++module_init(goldfish_tty_init); ++module_exit(goldfish_tty_exit); |