diff options
Diffstat (limited to 'drivers/staging/dream/smd/smd_tty.c')
| -rw-r--r-- | drivers/staging/dream/smd/smd_tty.c | 208 |
1 files changed, 0 insertions, 208 deletions
diff --git a/drivers/staging/dream/smd/smd_tty.c b/drivers/staging/dream/smd/smd_tty.c deleted file mode 100644 index f409449..0000000 --- a/drivers/staging/dream/smd/smd_tty.c +++ /dev/null @@ -1,208 +0,0 @@ -/* arch/arm/mach-msm/smd_tty.c - * - * Copyright (C) 2007 Google, Inc. - * Author: Brian Swetland <swetland@google.com> - * - * 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/module.h> -#include <linux/fs.h> -#include <linux/cdev.h> -#include <linux/device.h> -#include <linux/wait.h> - -#include <linux/tty.h> -#include <linux/tty_driver.h> -#include <linux/tty_flip.h> - -#include <mach/msm_smd.h> - -#define MAX_SMD_TTYS 32 - -static DEFINE_MUTEX(smd_tty_lock); - -struct smd_tty_info { - smd_channel_t *ch; - struct tty_struct *tty; - int open_count; -}; - -static struct smd_tty_info smd_tty[MAX_SMD_TTYS]; - - -static void smd_tty_notify(void *priv, unsigned event) -{ - unsigned char *ptr; - int avail; - struct smd_tty_info *info = priv; - struct tty_struct *tty = info->tty; - - if (!tty) - return; - - if (event != SMD_EVENT_DATA) - return; - - for (;;) { - if (test_bit(TTY_THROTTLED, &tty->flags)) break; - avail = smd_read_avail(info->ch); - if (avail == 0) break; - - avail = tty_prepare_flip_string(tty, &ptr, avail); - - if (smd_read(info->ch, ptr, avail) != avail) { - /* shouldn't be possible since we're in interrupt - ** context here and nobody else could 'steal' our - ** characters. - */ - printk(KERN_ERR "OOPS - smd_tty_buffer mismatch?!"); - } - - tty_flip_buffer_push(tty); - } - - /* XXX only when writable and necessary */ - tty_wakeup(tty); -} - -static int smd_tty_open(struct tty_struct *tty, struct file *f) -{ - int res = 0; - int n = tty->index; - struct smd_tty_info *info; - const char *name; - - if (n == 0) { - name = "SMD_DS"; - } else if (n == 27) { - name = "SMD_GPSNMEA"; - } else { - return -ENODEV; - } - - info = smd_tty + n; - - mutex_lock(&smd_tty_lock); - tty->driver_data = info; - - if (info->open_count++ == 0) { - info->tty = tty; - if (info->ch) { - smd_kick(info->ch); - } else { - res = smd_open(name, &info->ch, info, smd_tty_notify); - } - } - mutex_unlock(&smd_tty_lock); - - return res; -} - -static void smd_tty_close(struct tty_struct *tty, struct file *f) -{ - struct smd_tty_info *info = tty->driver_data; - - if (info == 0) - return; - - mutex_lock(&smd_tty_lock); - if (--info->open_count == 0) { - info->tty = 0; - tty->driver_data = 0; - if (info->ch) { - smd_close(info->ch); - info->ch = 0; - } - } - mutex_unlock(&smd_tty_lock); -} - -static int smd_tty_write(struct tty_struct *tty, const unsigned char *buf, int len) -{ - struct smd_tty_info *info = tty->driver_data; - int avail; - - /* if we're writing to a packet channel we will - ** never be able to write more data than there - ** is currently space for - */ - avail = smd_write_avail(info->ch); - if (len > avail) - len = avail; - - return smd_write(info->ch, buf, len); -} - -static int smd_tty_write_room(struct tty_struct *tty) -{ - struct smd_tty_info *info = tty->driver_data; - return smd_write_avail(info->ch); -} - -static int smd_tty_chars_in_buffer(struct tty_struct *tty) -{ - struct smd_tty_info *info = tty->driver_data; - return smd_read_avail(info->ch); -} - -static void smd_tty_unthrottle(struct tty_struct *tty) -{ - struct smd_tty_info *info = tty->driver_data; - smd_kick(info->ch); -} - -static struct tty_operations smd_tty_ops = { - .open = smd_tty_open, - .close = smd_tty_close, - .write = smd_tty_write, - .write_room = smd_tty_write_room, - .chars_in_buffer = smd_tty_chars_in_buffer, - .unthrottle = smd_tty_unthrottle, -}; - -static struct tty_driver *smd_tty_driver; - -static int __init smd_tty_init(void) -{ - int ret; - - smd_tty_driver = alloc_tty_driver(MAX_SMD_TTYS); - if (smd_tty_driver == 0) - return -ENOMEM; - - smd_tty_driver->owner = THIS_MODULE; - smd_tty_driver->driver_name = "smd_tty_driver"; - smd_tty_driver->name = "smd"; - smd_tty_driver->major = 0; - smd_tty_driver->minor_start = 0; - smd_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; - smd_tty_driver->subtype = SERIAL_TYPE_NORMAL; - smd_tty_driver->init_termios = tty_std_termios; - smd_tty_driver->init_termios.c_iflag = 0; - smd_tty_driver->init_termios.c_oflag = 0; - smd_tty_driver->init_termios.c_cflag = B38400 | CS8 | CREAD; - smd_tty_driver->init_termios.c_lflag = 0; - smd_tty_driver->flags = TTY_DRIVER_RESET_TERMIOS | - TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; - tty_set_operations(smd_tty_driver, &smd_tty_ops); - - ret = tty_register_driver(smd_tty_driver); - if (ret) return ret; - - /* this should be dynamic */ - tty_register_device(smd_tty_driver, 0, 0); - tty_register_device(smd_tty_driver, 27, 0); - - return 0; -} - -module_init(smd_tty_init); |
