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path: root/drivers/char/pcmcia/ipwireless/tty.c
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Diffstat (limited to 'drivers/char/pcmcia/ipwireless/tty.c')
-rw-r--r--drivers/char/pcmcia/ipwireless/tty.c679
1 files changed, 0 insertions, 679 deletions
diff --git a/drivers/char/pcmcia/ipwireless/tty.c b/drivers/char/pcmcia/ipwireless/tty.c
deleted file mode 100644
index f5eb28b6cb0..00000000000
--- a/drivers/char/pcmcia/ipwireless/tty.c
+++ /dev/null
@@ -1,679 +0,0 @@
-/*
- * IPWireless 3G PCMCIA Network Driver
- *
- * Original code
- * by Stephen Blackheath <stephen@blacksapphire.com>,
- * Ben Martel <benm@symmetric.co.nz>
- *
- * Copyrighted as follows:
- * Copyright (C) 2004 by Symmetric Systems Ltd (NZ)
- *
- * Various driver changes and rewrites, port to new kernels
- * Copyright (C) 2006-2007 Jiri Kosina
- *
- * Misc code cleanups and updates
- * Copyright (C) 2007 David Sterba
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/ppp_defs.h>
-#include <linux/if.h>
-#include <linux/if_ppp.h>
-#include <linux/sched.h>
-#include <linux/serial.h>
-#include <linux/slab.h>
-#include <linux/tty.h>
-#include <linux/tty_driver.h>
-#include <linux/tty_flip.h>
-#include <linux/uaccess.h>
-
-#include "tty.h"
-#include "network.h"
-#include "hardware.h"
-#include "main.h"
-
-#define IPWIRELESS_PCMCIA_START (0)
-#define IPWIRELESS_PCMCIA_MINORS (24)
-#define IPWIRELESS_PCMCIA_MINOR_RANGE (8)
-
-#define TTYTYPE_MODEM (0)
-#define TTYTYPE_MONITOR (1)
-#define TTYTYPE_RAS_RAW (2)
-
-struct ipw_tty {
- int index;
- struct ipw_hardware *hardware;
- unsigned int channel_idx;
- unsigned int secondary_channel_idx;
- int tty_type;
- struct ipw_network *network;
- struct tty_struct *linux_tty;
- int open_count;
- unsigned int control_lines;
- struct mutex ipw_tty_mutex;
- int tx_bytes_queued;
- int closing;
-};
-
-static struct ipw_tty *ttys[IPWIRELESS_PCMCIA_MINORS];
-
-static struct tty_driver *ipw_tty_driver;
-
-static char *tty_type_name(int tty_type)
-{
- static char *channel_names[] = {
- "modem",
- "monitor",
- "RAS-raw"
- };
-
- return channel_names[tty_type];
-}
-
-static void report_registering(struct ipw_tty *tty)
-{
- char *iftype = tty_type_name(tty->tty_type);
-
- printk(KERN_INFO IPWIRELESS_PCCARD_NAME
- ": registering %s device ttyIPWp%d\n", iftype, tty->index);
-}
-
-static void report_deregistering(struct ipw_tty *tty)
-{
- char *iftype = tty_type_name(tty->tty_type);
-
- printk(KERN_INFO IPWIRELESS_PCCARD_NAME
- ": deregistering %s device ttyIPWp%d\n", iftype,
- tty->index);
-}
-
-static struct ipw_tty *get_tty(int minor)
-{
- if (minor < ipw_tty_driver->minor_start
- || minor >= ipw_tty_driver->minor_start +
- IPWIRELESS_PCMCIA_MINORS)
- return NULL;
- else {
- int minor_offset = minor - ipw_tty_driver->minor_start;
-
- /*
- * The 'ras_raw' channel is only available when 'loopback' mode
- * is enabled.
- * Number of minor starts with 16 (_RANGE * _RAS_RAW).
- */
- if (!ipwireless_loopback &&
- minor_offset >=
- IPWIRELESS_PCMCIA_MINOR_RANGE * TTYTYPE_RAS_RAW)
- return NULL;
-
- return ttys[minor_offset];
- }
-}
-
-static int ipw_open(struct tty_struct *linux_tty, struct file *filp)
-{
- int minor = linux_tty->index;
- struct ipw_tty *tty = get_tty(minor);
-
- if (!tty)
- return -ENODEV;
-
- mutex_lock(&tty->ipw_tty_mutex);
-
- if (tty->closing) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return -ENODEV;
- }
- if (tty->open_count == 0)
- tty->tx_bytes_queued = 0;
-
- tty->open_count++;
-
- tty->linux_tty = linux_tty;
- linux_tty->driver_data = tty;
- linux_tty->low_latency = 1;
-
- if (tty->tty_type == TTYTYPE_MODEM)
- ipwireless_ppp_open(tty->network);
-
- mutex_unlock(&tty->ipw_tty_mutex);
-
- return 0;
-}
-
-static void do_ipw_close(struct ipw_tty *tty)
-{
- tty->open_count--;
-
- if (tty->open_count == 0) {
- struct tty_struct *linux_tty = tty->linux_tty;
-
- if (linux_tty != NULL) {
- tty->linux_tty = NULL;
- linux_tty->driver_data = NULL;
-
- if (tty->tty_type == TTYTYPE_MODEM)
- ipwireless_ppp_close(tty->network);
- }
- }
-}
-
-static void ipw_hangup(struct tty_struct *linux_tty)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
-
- if (!tty)
- return;
-
- mutex_lock(&tty->ipw_tty_mutex);
- if (tty->open_count == 0) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return;
- }
-
- do_ipw_close(tty);
-
- mutex_unlock(&tty->ipw_tty_mutex);
-}
-
-static void ipw_close(struct tty_struct *linux_tty, struct file *filp)
-{
- ipw_hangup(linux_tty);
-}
-
-/* Take data received from hardware, and send it out the tty */
-void ipwireless_tty_received(struct ipw_tty *tty, unsigned char *data,
- unsigned int length)
-{
- struct tty_struct *linux_tty;
- int work = 0;
-
- mutex_lock(&tty->ipw_tty_mutex);
- linux_tty = tty->linux_tty;
- if (linux_tty == NULL) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return;
- }
-
- if (!tty->open_count) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return;
- }
- mutex_unlock(&tty->ipw_tty_mutex);
-
- work = tty_insert_flip_string(linux_tty, data, length);
-
- if (work != length)
- printk(KERN_DEBUG IPWIRELESS_PCCARD_NAME
- ": %d chars not inserted to flip buffer!\n",
- length - work);
-
- /*
- * This may sleep if ->low_latency is set
- */
- if (work)
- tty_flip_buffer_push(linux_tty);
-}
-
-static void ipw_write_packet_sent_callback(void *callback_data,
- unsigned int packet_length)
-{
- struct ipw_tty *tty = callback_data;
-
- /*
- * Packet has been sent, so we subtract the number of bytes from our
- * tally of outstanding TX bytes.
- */
- tty->tx_bytes_queued -= packet_length;
-}
-
-static int ipw_write(struct tty_struct *linux_tty,
- const unsigned char *buf, int count)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
- int room, ret;
-
- if (!tty)
- return -ENODEV;
-
- mutex_lock(&tty->ipw_tty_mutex);
- if (!tty->open_count) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return -EINVAL;
- }
-
- room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued;
- if (room < 0)
- room = 0;
- /* Don't allow caller to write any more than we have room for */
- if (count > room)
- count = room;
-
- if (count == 0) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return 0;
- }
-
- ret = ipwireless_send_packet(tty->hardware, IPW_CHANNEL_RAS,
- buf, count,
- ipw_write_packet_sent_callback, tty);
- if (ret == -1) {
- mutex_unlock(&tty->ipw_tty_mutex);
- return 0;
- }
-
- tty->tx_bytes_queued += count;
- mutex_unlock(&tty->ipw_tty_mutex);
-
- return count;
-}
-
-static int ipw_write_room(struct tty_struct *linux_tty)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
- int room;
-
- /* FIXME: Exactly how is the tty object locked here .. */
- if (!tty)
- return -ENODEV;
-
- if (!tty->open_count)
- return -EINVAL;
-
- room = IPWIRELESS_TX_QUEUE_SIZE - tty->tx_bytes_queued;
- if (room < 0)
- room = 0;
-
- return room;
-}
-
-static int ipwireless_get_serial_info(struct ipw_tty *tty,
- struct serial_struct __user *retinfo)
-{
- struct serial_struct tmp;
-
- if (!retinfo)
- return (-EFAULT);
-
- memset(&tmp, 0, sizeof(tmp));
- tmp.type = PORT_UNKNOWN;
- tmp.line = tty->index;
- tmp.port = 0;
- tmp.irq = 0;
- tmp.flags = 0;
- tmp.baud_base = 115200;
- tmp.close_delay = 0;
- tmp.closing_wait = 0;
- tmp.custom_divisor = 0;
- tmp.hub6 = 0;
- if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
-
- return 0;
-}
-
-static int ipw_chars_in_buffer(struct tty_struct *linux_tty)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
-
- if (!tty)
- return 0;
-
- if (!tty->open_count)
- return 0;
-
- return tty->tx_bytes_queued;
-}
-
-static int get_control_lines(struct ipw_tty *tty)
-{
- unsigned int my = tty->control_lines;
- unsigned int out = 0;
-
- if (my & IPW_CONTROL_LINE_RTS)
- out |= TIOCM_RTS;
- if (my & IPW_CONTROL_LINE_DTR)
- out |= TIOCM_DTR;
- if (my & IPW_CONTROL_LINE_CTS)
- out |= TIOCM_CTS;
- if (my & IPW_CONTROL_LINE_DSR)
- out |= TIOCM_DSR;
- if (my & IPW_CONTROL_LINE_DCD)
- out |= TIOCM_CD;
-
- return out;
-}
-
-static int set_control_lines(struct ipw_tty *tty, unsigned int set,
- unsigned int clear)
-{
- int ret;
-
- if (set & TIOCM_RTS) {
- ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 1);
- if (ret)
- return ret;
- if (tty->secondary_channel_idx != -1) {
- ret = ipwireless_set_RTS(tty->hardware,
- tty->secondary_channel_idx, 1);
- if (ret)
- return ret;
- }
- }
- if (set & TIOCM_DTR) {
- ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 1);
- if (ret)
- return ret;
- if (tty->secondary_channel_idx != -1) {
- ret = ipwireless_set_DTR(tty->hardware,
- tty->secondary_channel_idx, 1);
- if (ret)
- return ret;
- }
- }
- if (clear & TIOCM_RTS) {
- ret = ipwireless_set_RTS(tty->hardware, tty->channel_idx, 0);
- if (tty->secondary_channel_idx != -1) {
- ret = ipwireless_set_RTS(tty->hardware,
- tty->secondary_channel_idx, 0);
- if (ret)
- return ret;
- }
- }
- if (clear & TIOCM_DTR) {
- ret = ipwireless_set_DTR(tty->hardware, tty->channel_idx, 0);
- if (tty->secondary_channel_idx != -1) {
- ret = ipwireless_set_DTR(tty->hardware,
- tty->secondary_channel_idx, 0);
- if (ret)
- return ret;
- }
- }
- return 0;
-}
-
-static int ipw_tiocmget(struct tty_struct *linux_tty, struct file *file)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
- /* FIXME: Exactly how is the tty object locked here .. */
-
- if (!tty)
- return -ENODEV;
-
- if (!tty->open_count)
- return -EINVAL;
-
- return get_control_lines(tty);
-}
-
-static int
-ipw_tiocmset(struct tty_struct *linux_tty, struct file *file,
- unsigned int set, unsigned int clear)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
- /* FIXME: Exactly how is the tty object locked here .. */
-
- if (!tty)
- return -ENODEV;
-
- if (!tty->open_count)
- return -EINVAL;
-
- return set_control_lines(tty, set, clear);
-}
-
-static int ipw_ioctl(struct tty_struct *linux_tty, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct ipw_tty *tty = linux_tty->driver_data;
-
- if (!tty)
- return -ENODEV;
-
- if (!tty->open_count)
- return -EINVAL;
-
- /* FIXME: Exactly how is the tty object locked here .. */
-
- switch (cmd) {
- case TIOCGSERIAL:
- return ipwireless_get_serial_info(tty, (void __user *) arg);
-
- case TIOCSSERIAL:
- return 0; /* Keeps the PCMCIA scripts happy. */
- }
-
- if (tty->tty_type == TTYTYPE_MODEM) {
- switch (cmd) {
- case PPPIOCGCHAN:
- {
- int chan = ipwireless_ppp_channel_index(
- tty->network);
-
- if (chan < 0)
- return -ENODEV;
- if (put_user(chan, (int __user *) arg))
- return -EFAULT;
- }
- return 0;
-
- case PPPIOCGUNIT:
- {
- int unit = ipwireless_ppp_unit_number(
- tty->network);
-
- if (unit < 0)
- return -ENODEV;
- if (put_user(unit, (int __user *) arg))
- return -EFAULT;
- }
- return 0;
-
- case FIONREAD:
- {
- int val = 0;
-
- if (put_user(val, (int __user *) arg))
- return -EFAULT;
- }
- return 0;
- case TCFLSH:
- return tty_perform_flush(linux_tty, arg);
- }
- }
- return tty_mode_ioctl(linux_tty, file, cmd , arg);
-}
-
-static int add_tty(int j,
- struct ipw_hardware *hardware,
- struct ipw_network *network, int channel_idx,
- int secondary_channel_idx, int tty_type)
-{
- ttys[j] = kzalloc(sizeof(struct ipw_tty), GFP_KERNEL);
- if (!ttys[j])
- return -ENOMEM;
- ttys[j]->index = j;
- ttys[j]->hardware = hardware;
- ttys[j]->channel_idx = channel_idx;
- ttys[j]->secondary_channel_idx = secondary_channel_idx;
- ttys[j]->network = network;
- ttys[j]->tty_type = tty_type;
- mutex_init(&ttys[j]->ipw_tty_mutex);
-
- tty_register_device(ipw_tty_driver, j, NULL);
- ipwireless_associate_network_tty(network, channel_idx, ttys[j]);
-
- if (secondary_channel_idx != -1)
- ipwireless_associate_network_tty(network,
- secondary_channel_idx,
- ttys[j]);
- if (get_tty(j + ipw_tty_driver->minor_start) == ttys[j])
- report_registering(ttys[j]);
- return 0;
-}
-
-struct ipw_tty *ipwireless_tty_create(struct ipw_hardware *hardware,
- struct ipw_network *network)
-{
- int i, j;
-
- for (i = 0; i < IPWIRELESS_PCMCIA_MINOR_RANGE; i++) {
- int allfree = 1;
-
- for (j = i; j < IPWIRELESS_PCMCIA_MINORS;
- j += IPWIRELESS_PCMCIA_MINOR_RANGE)
- if (ttys[j] != NULL) {
- allfree = 0;
- break;
- }
-
- if (allfree) {
- j = i;
-
- if (add_tty(j, hardware, network,
- IPW_CHANNEL_DIALLER, IPW_CHANNEL_RAS,
- TTYTYPE_MODEM))
- return NULL;
-
- j += IPWIRELESS_PCMCIA_MINOR_RANGE;
- if (add_tty(j, hardware, network,
- IPW_CHANNEL_DIALLER, -1,
- TTYTYPE_MONITOR))
- return NULL;
-
- j += IPWIRELESS_PCMCIA_MINOR_RANGE;
- if (add_tty(j, hardware, network,
- IPW_CHANNEL_RAS, -1,
- TTYTYPE_RAS_RAW))
- return NULL;
-
- return ttys[i];
- }
- }
- return NULL;
-}
-
-/*
- * Must be called before ipwireless_network_free().
- */
-void ipwireless_tty_free(struct ipw_tty *tty)
-{
- int j;
- struct ipw_network *network = ttys[tty->index]->network;
-
- for (j = tty->index; j < IPWIRELESS_PCMCIA_MINORS;
- j += IPWIRELESS_PCMCIA_MINOR_RANGE) {
- struct ipw_tty *ttyj = ttys[j];
-
- if (ttyj) {
- mutex_lock(&ttyj->ipw_tty_mutex);
- if (get_tty(j + ipw_tty_driver->minor_start) == ttyj)
- report_deregistering(ttyj);
- ttyj->closing = 1;
- if (ttyj->linux_tty != NULL) {
- mutex_unlock(&ttyj->ipw_tty_mutex);
- tty_hangup(ttyj->linux_tty);
- /* Wait till the tty_hangup has completed */
- flush_work_sync(&ttyj->linux_tty->hangup_work);
- /* FIXME: Exactly how is the tty object locked here
- against a parallel ioctl etc */
- mutex_lock(&ttyj->ipw_tty_mutex);
- }
- while (ttyj->open_count)
- do_ipw_close(ttyj);
- ipwireless_disassociate_network_ttys(network,
- ttyj->channel_idx);
- tty_unregister_device(ipw_tty_driver, j);
- ttys[j] = NULL;
- mutex_unlock(&ttyj->ipw_tty_mutex);
- kfree(ttyj);
- }
- }
-}
-
-static const struct tty_operations tty_ops = {
- .open = ipw_open,
- .close = ipw_close,
- .hangup = ipw_hangup,
- .write = ipw_write,
- .write_room = ipw_write_room,
- .ioctl = ipw_ioctl,
- .chars_in_buffer = ipw_chars_in_buffer,
- .tiocmget = ipw_tiocmget,
- .tiocmset = ipw_tiocmset,
-};
-
-int ipwireless_tty_init(void)
-{
- int result;
-
- ipw_tty_driver = alloc_tty_driver(IPWIRELESS_PCMCIA_MINORS);
- if (!ipw_tty_driver)
- return -ENOMEM;
-
- ipw_tty_driver->owner = THIS_MODULE;
- ipw_tty_driver->driver_name = IPWIRELESS_PCCARD_NAME;
- ipw_tty_driver->name = "ttyIPWp";
- ipw_tty_driver->major = 0;
- ipw_tty_driver->minor_start = IPWIRELESS_PCMCIA_START;
- ipw_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- ipw_tty_driver->subtype = SERIAL_TYPE_NORMAL;
- ipw_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
- ipw_tty_driver->init_termios = tty_std_termios;
- ipw_tty_driver->init_termios.c_cflag =
- B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- ipw_tty_driver->init_termios.c_ispeed = 9600;
- ipw_tty_driver->init_termios.c_ospeed = 9600;
- tty_set_operations(ipw_tty_driver, &tty_ops);
- result = tty_register_driver(ipw_tty_driver);
- if (result) {
- printk(KERN_ERR IPWIRELESS_PCCARD_NAME
- ": failed to register tty driver\n");
- put_tty_driver(ipw_tty_driver);
- return result;
- }
-
- return 0;
-}
-
-void ipwireless_tty_release(void)
-{
- int ret;
-
- ret = tty_unregister_driver(ipw_tty_driver);
- put_tty_driver(ipw_tty_driver);
- if (ret != 0)
- printk(KERN_ERR IPWIRELESS_PCCARD_NAME
- ": tty_unregister_driver failed with code %d\n", ret);
-}
-
-int ipwireless_tty_is_modem(struct ipw_tty *tty)
-{
- return tty->tty_type == TTYTYPE_MODEM;
-}
-
-void
-ipwireless_tty_notify_control_line_change(struct ipw_tty *tty,
- unsigned int channel_idx,
- unsigned int control_lines,
- unsigned int changed_mask)
-{
- unsigned int old_control_lines = tty->control_lines;
-
- tty->control_lines = (tty->control_lines & ~changed_mask)
- | (control_lines & changed_mask);
-
- /*
- * If DCD is de-asserted, we close the tty so pppd can tell that we
- * have gone offline.
- */
- if ((old_control_lines & IPW_CONTROL_LINE_DCD)
- && !(tty->control_lines & IPW_CONTROL_LINE_DCD)
- && tty->linux_tty) {
- tty_hangup(tty->linux_tty);
- }
-}
-
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