![Tilman Schmidt](/assets/img/avatar_default.png)
Various functions in the Gigaset driver were using different conventions for the meaning of their int return values. Align them to the usual negative error numbers convention. Inspired-by: Julia Lawall <julia.lawall@lip6.fr> Signed-off-by: Tilman Schmidt <tilman@imap.cc> Signed-off-by: David S. Miller <davem@davemloft.net>
1171 lines
26 KiB
C
1171 lines
26 KiB
C
/*
|
|
* Stuff used by all variants of the driver
|
|
*
|
|
* Copyright (c) 2001 by Stefan Eilers,
|
|
* Hansjoerg Lipp <hjlipp@web.de>,
|
|
* Tilman Schmidt <tilman@imap.cc>.
|
|
*
|
|
* =====================================================================
|
|
* 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 "gigaset.h"
|
|
#include <linux/module.h>
|
|
#include <linux/moduleparam.h>
|
|
|
|
/* Version Information */
|
|
#define DRIVER_AUTHOR "Hansjoerg Lipp <hjlipp@web.de>, Tilman Schmidt <tilman@imap.cc>, Stefan Eilers"
|
|
#define DRIVER_DESC "Driver for Gigaset 307x"
|
|
|
|
#ifdef CONFIG_GIGASET_DEBUG
|
|
#define DRIVER_DESC_DEBUG " (debug build)"
|
|
#else
|
|
#define DRIVER_DESC_DEBUG ""
|
|
#endif
|
|
|
|
/* Module parameters */
|
|
int gigaset_debuglevel;
|
|
EXPORT_SYMBOL_GPL(gigaset_debuglevel);
|
|
module_param_named(debug, gigaset_debuglevel, int, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(debug, "debug level");
|
|
|
|
/* driver state flags */
|
|
#define VALID_MINOR 0x01
|
|
#define VALID_ID 0x02
|
|
|
|
/**
|
|
* gigaset_dbg_buffer() - dump data in ASCII and hex for debugging
|
|
* @level: debugging level.
|
|
* @msg: message prefix.
|
|
* @len: number of bytes to dump.
|
|
* @buf: data to dump.
|
|
*
|
|
* If the current debugging level includes one of the bits set in @level,
|
|
* @len bytes starting at @buf are logged to dmesg at KERN_DEBUG prio,
|
|
* prefixed by the text @msg.
|
|
*/
|
|
void gigaset_dbg_buffer(enum debuglevel level, const unsigned char *msg,
|
|
size_t len, const unsigned char *buf)
|
|
{
|
|
unsigned char outbuf[80];
|
|
unsigned char c;
|
|
size_t space = sizeof outbuf - 1;
|
|
unsigned char *out = outbuf;
|
|
size_t numin = len;
|
|
|
|
while (numin--) {
|
|
c = *buf++;
|
|
if (c == '~' || c == '^' || c == '\\') {
|
|
if (!space--)
|
|
break;
|
|
*out++ = '\\';
|
|
}
|
|
if (c & 0x80) {
|
|
if (!space--)
|
|
break;
|
|
*out++ = '~';
|
|
c ^= 0x80;
|
|
}
|
|
if (c < 0x20 || c == 0x7f) {
|
|
if (!space--)
|
|
break;
|
|
*out++ = '^';
|
|
c ^= 0x40;
|
|
}
|
|
if (!space--)
|
|
break;
|
|
*out++ = c;
|
|
}
|
|
*out = 0;
|
|
|
|
gig_dbg(level, "%s (%u bytes): %s", msg, (unsigned) len, outbuf);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_dbg_buffer);
|
|
|
|
static int setflags(struct cardstate *cs, unsigned flags, unsigned delay)
|
|
{
|
|
int r;
|
|
|
|
r = cs->ops->set_modem_ctrl(cs, cs->control_state, flags);
|
|
cs->control_state = flags;
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (delay) {
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
schedule_timeout(delay * HZ / 1000);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int gigaset_enterconfigmode(struct cardstate *cs)
|
|
{
|
|
int i, r;
|
|
|
|
cs->control_state = TIOCM_RTS;
|
|
|
|
r = setflags(cs, TIOCM_DTR, 200);
|
|
if (r < 0)
|
|
goto error;
|
|
r = setflags(cs, 0, 200);
|
|
if (r < 0)
|
|
goto error;
|
|
for (i = 0; i < 5; ++i) {
|
|
r = setflags(cs, TIOCM_RTS, 100);
|
|
if (r < 0)
|
|
goto error;
|
|
r = setflags(cs, 0, 100);
|
|
if (r < 0)
|
|
goto error;
|
|
}
|
|
r = setflags(cs, TIOCM_RTS | TIOCM_DTR, 800);
|
|
if (r < 0)
|
|
goto error;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
dev_err(cs->dev, "error %d on setuartbits\n", -r);
|
|
cs->control_state = TIOCM_RTS | TIOCM_DTR;
|
|
cs->ops->set_modem_ctrl(cs, 0, TIOCM_RTS | TIOCM_DTR);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static int test_timeout(struct at_state_t *at_state)
|
|
{
|
|
if (!at_state->timer_expires)
|
|
return 0;
|
|
|
|
if (--at_state->timer_expires) {
|
|
gig_dbg(DEBUG_MCMD, "decreased timer of %p to %lu",
|
|
at_state, at_state->timer_expires);
|
|
return 0;
|
|
}
|
|
|
|
gigaset_add_event(at_state->cs, at_state, EV_TIMEOUT, NULL,
|
|
at_state->timer_index, NULL);
|
|
return 1;
|
|
}
|
|
|
|
static void timer_tick(unsigned long data)
|
|
{
|
|
struct cardstate *cs = (struct cardstate *) data;
|
|
unsigned long flags;
|
|
unsigned channel;
|
|
struct at_state_t *at_state;
|
|
int timeout = 0;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
|
|
for (channel = 0; channel < cs->channels; ++channel)
|
|
if (test_timeout(&cs->bcs[channel].at_state))
|
|
timeout = 1;
|
|
|
|
if (test_timeout(&cs->at_state))
|
|
timeout = 1;
|
|
|
|
list_for_each_entry(at_state, &cs->temp_at_states, list)
|
|
if (test_timeout(at_state))
|
|
timeout = 1;
|
|
|
|
if (cs->running) {
|
|
mod_timer(&cs->timer, jiffies + msecs_to_jiffies(GIG_TICK));
|
|
if (timeout) {
|
|
gig_dbg(DEBUG_EVENT, "scheduling timeout");
|
|
tasklet_schedule(&cs->event_tasklet);
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
}
|
|
|
|
int gigaset_get_channel(struct bc_state *bcs)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
if (bcs->use_count || !try_module_get(bcs->cs->driver->owner)) {
|
|
gig_dbg(DEBUG_CHANNEL, "could not allocate channel %d",
|
|
bcs->channel);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
return -EBUSY;
|
|
}
|
|
++bcs->use_count;
|
|
bcs->busy = 1;
|
|
gig_dbg(DEBUG_CHANNEL, "allocated channel %d", bcs->channel);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
return 0;
|
|
}
|
|
|
|
struct bc_state *gigaset_get_free_channel(struct cardstate *cs)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
if (!try_module_get(cs->driver->owner)) {
|
|
gig_dbg(DEBUG_CHANNEL,
|
|
"could not get module for allocating channel");
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
return NULL;
|
|
}
|
|
for (i = 0; i < cs->channels; ++i)
|
|
if (!cs->bcs[i].use_count) {
|
|
++cs->bcs[i].use_count;
|
|
cs->bcs[i].busy = 1;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gig_dbg(DEBUG_CHANNEL, "allocated channel %d", i);
|
|
return cs->bcs + i;
|
|
}
|
|
module_put(cs->driver->owner);
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gig_dbg(DEBUG_CHANNEL, "no free channel");
|
|
return NULL;
|
|
}
|
|
|
|
void gigaset_free_channel(struct bc_state *bcs)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&bcs->cs->lock, flags);
|
|
if (!bcs->busy) {
|
|
gig_dbg(DEBUG_CHANNEL, "could not free channel %d",
|
|
bcs->channel);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
return;
|
|
}
|
|
--bcs->use_count;
|
|
bcs->busy = 0;
|
|
module_put(bcs->cs->driver->owner);
|
|
gig_dbg(DEBUG_CHANNEL, "freed channel %d", bcs->channel);
|
|
spin_unlock_irqrestore(&bcs->cs->lock, flags);
|
|
}
|
|
|
|
int gigaset_get_channels(struct cardstate *cs)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
for (i = 0; i < cs->channels; ++i)
|
|
if (cs->bcs[i].use_count) {
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
gig_dbg(DEBUG_CHANNEL,
|
|
"could not allocate all channels");
|
|
return -EBUSY;
|
|
}
|
|
for (i = 0; i < cs->channels; ++i)
|
|
++cs->bcs[i].use_count;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
|
|
gig_dbg(DEBUG_CHANNEL, "allocated all channels");
|
|
|
|
return 0;
|
|
}
|
|
|
|
void gigaset_free_channels(struct cardstate *cs)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
gig_dbg(DEBUG_CHANNEL, "unblocking all channels");
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
for (i = 0; i < cs->channels; ++i)
|
|
--cs->bcs[i].use_count;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
}
|
|
|
|
void gigaset_block_channels(struct cardstate *cs)
|
|
{
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
gig_dbg(DEBUG_CHANNEL, "blocking all channels");
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
for (i = 0; i < cs->channels; ++i)
|
|
++cs->bcs[i].use_count;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
}
|
|
|
|
static void clear_events(struct cardstate *cs)
|
|
{
|
|
struct event_t *ev;
|
|
unsigned head, tail;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cs->ev_lock, flags);
|
|
|
|
head = cs->ev_head;
|
|
tail = cs->ev_tail;
|
|
|
|
while (tail != head) {
|
|
ev = cs->events + head;
|
|
kfree(ev->ptr);
|
|
head = (head + 1) % MAX_EVENTS;
|
|
}
|
|
|
|
cs->ev_head = tail;
|
|
|
|
spin_unlock_irqrestore(&cs->ev_lock, flags);
|
|
}
|
|
|
|
/**
|
|
* gigaset_add_event() - add event to device event queue
|
|
* @cs: device descriptor structure.
|
|
* @at_state: connection state structure.
|
|
* @type: event type.
|
|
* @ptr: pointer parameter for event.
|
|
* @parameter: integer parameter for event.
|
|
* @arg: pointer parameter for event.
|
|
*
|
|
* Allocate an event queue entry from the device's event queue, and set it up
|
|
* with the parameters given.
|
|
*
|
|
* Return value: added event
|
|
*/
|
|
struct event_t *gigaset_add_event(struct cardstate *cs,
|
|
struct at_state_t *at_state, int type,
|
|
void *ptr, int parameter, void *arg)
|
|
{
|
|
unsigned long flags;
|
|
unsigned next, tail;
|
|
struct event_t *event = NULL;
|
|
|
|
gig_dbg(DEBUG_EVENT, "queueing event %d", type);
|
|
|
|
spin_lock_irqsave(&cs->ev_lock, flags);
|
|
|
|
tail = cs->ev_tail;
|
|
next = (tail + 1) % MAX_EVENTS;
|
|
if (unlikely(next == cs->ev_head))
|
|
dev_err(cs->dev, "event queue full\n");
|
|
else {
|
|
event = cs->events + tail;
|
|
event->type = type;
|
|
event->at_state = at_state;
|
|
event->cid = -1;
|
|
event->ptr = ptr;
|
|
event->arg = arg;
|
|
event->parameter = parameter;
|
|
cs->ev_tail = next;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&cs->ev_lock, flags);
|
|
|
|
return event;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_add_event);
|
|
|
|
static void clear_at_state(struct at_state_t *at_state)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < STR_NUM; ++i) {
|
|
kfree(at_state->str_var[i]);
|
|
at_state->str_var[i] = NULL;
|
|
}
|
|
}
|
|
|
|
static void dealloc_temp_at_states(struct cardstate *cs)
|
|
{
|
|
struct at_state_t *cur, *next;
|
|
|
|
list_for_each_entry_safe(cur, next, &cs->temp_at_states, list) {
|
|
list_del(&cur->list);
|
|
clear_at_state(cur);
|
|
kfree(cur);
|
|
}
|
|
}
|
|
|
|
static void gigaset_freebcs(struct bc_state *bcs)
|
|
{
|
|
int i;
|
|
|
|
gig_dbg(DEBUG_INIT, "freeing bcs[%d]->hw", bcs->channel);
|
|
bcs->cs->ops->freebcshw(bcs);
|
|
|
|
gig_dbg(DEBUG_INIT, "clearing bcs[%d]->at_state", bcs->channel);
|
|
clear_at_state(&bcs->at_state);
|
|
gig_dbg(DEBUG_INIT, "freeing bcs[%d]->skb", bcs->channel);
|
|
dev_kfree_skb(bcs->rx_skb);
|
|
bcs->rx_skb = NULL;
|
|
|
|
for (i = 0; i < AT_NUM; ++i) {
|
|
kfree(bcs->commands[i]);
|
|
bcs->commands[i] = NULL;
|
|
}
|
|
}
|
|
|
|
static struct cardstate *alloc_cs(struct gigaset_driver *drv)
|
|
{
|
|
unsigned long flags;
|
|
unsigned i;
|
|
struct cardstate *cs;
|
|
struct cardstate *ret = NULL;
|
|
|
|
spin_lock_irqsave(&drv->lock, flags);
|
|
if (drv->blocked)
|
|
goto exit;
|
|
for (i = 0; i < drv->minors; ++i) {
|
|
cs = drv->cs + i;
|
|
if (!(cs->flags & VALID_MINOR)) {
|
|
cs->flags = VALID_MINOR;
|
|
ret = cs;
|
|
break;
|
|
}
|
|
}
|
|
exit:
|
|
spin_unlock_irqrestore(&drv->lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static void free_cs(struct cardstate *cs)
|
|
{
|
|
cs->flags = 0;
|
|
}
|
|
|
|
static void make_valid(struct cardstate *cs, unsigned mask)
|
|
{
|
|
unsigned long flags;
|
|
struct gigaset_driver *drv = cs->driver;
|
|
spin_lock_irqsave(&drv->lock, flags);
|
|
cs->flags |= mask;
|
|
spin_unlock_irqrestore(&drv->lock, flags);
|
|
}
|
|
|
|
static void make_invalid(struct cardstate *cs, unsigned mask)
|
|
{
|
|
unsigned long flags;
|
|
struct gigaset_driver *drv = cs->driver;
|
|
spin_lock_irqsave(&drv->lock, flags);
|
|
cs->flags &= ~mask;
|
|
spin_unlock_irqrestore(&drv->lock, flags);
|
|
}
|
|
|
|
/**
|
|
* gigaset_freecs() - free all associated ressources of a device
|
|
* @cs: device descriptor structure.
|
|
*
|
|
* Stops all tasklets and timers, unregisters the device from all
|
|
* subsystems it was registered to, deallocates the device structure
|
|
* @cs and all structures referenced from it.
|
|
* Operations on the device should be stopped before calling this.
|
|
*/
|
|
void gigaset_freecs(struct cardstate *cs)
|
|
{
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
if (!cs)
|
|
return;
|
|
|
|
mutex_lock(&cs->mutex);
|
|
|
|
if (!cs->bcs)
|
|
goto f_cs;
|
|
if (!cs->inbuf)
|
|
goto f_bcs;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->running = 0;
|
|
spin_unlock_irqrestore(&cs->lock, flags); /* event handler and timer are
|
|
not rescheduled below */
|
|
|
|
tasklet_kill(&cs->event_tasklet);
|
|
del_timer_sync(&cs->timer);
|
|
|
|
switch (cs->cs_init) {
|
|
default:
|
|
/* clear B channel structures */
|
|
for (i = 0; i < cs->channels; ++i) {
|
|
gig_dbg(DEBUG_INIT, "clearing bcs[%d]", i);
|
|
gigaset_freebcs(cs->bcs + i);
|
|
}
|
|
|
|
/* clear device sysfs */
|
|
gigaset_free_dev_sysfs(cs);
|
|
|
|
gigaset_if_free(cs);
|
|
|
|
gig_dbg(DEBUG_INIT, "clearing hw");
|
|
cs->ops->freecshw(cs);
|
|
|
|
/* fall through */
|
|
case 2: /* error in initcshw */
|
|
/* Deregister from LL */
|
|
make_invalid(cs, VALID_ID);
|
|
gigaset_isdn_unregdev(cs);
|
|
|
|
/* fall through */
|
|
case 1: /* error when registering to LL */
|
|
gig_dbg(DEBUG_INIT, "clearing at_state");
|
|
clear_at_state(&cs->at_state);
|
|
dealloc_temp_at_states(cs);
|
|
|
|
/* fall through */
|
|
case 0: /* error in basic setup */
|
|
clear_events(cs);
|
|
gig_dbg(DEBUG_INIT, "freeing inbuf");
|
|
kfree(cs->inbuf);
|
|
}
|
|
f_bcs: gig_dbg(DEBUG_INIT, "freeing bcs[]");
|
|
kfree(cs->bcs);
|
|
f_cs: gig_dbg(DEBUG_INIT, "freeing cs");
|
|
mutex_unlock(&cs->mutex);
|
|
free_cs(cs);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_freecs);
|
|
|
|
void gigaset_at_init(struct at_state_t *at_state, struct bc_state *bcs,
|
|
struct cardstate *cs, int cid)
|
|
{
|
|
int i;
|
|
|
|
INIT_LIST_HEAD(&at_state->list);
|
|
at_state->waiting = 0;
|
|
at_state->getstring = 0;
|
|
at_state->pending_commands = 0;
|
|
at_state->timer_expires = 0;
|
|
at_state->timer_active = 0;
|
|
at_state->timer_index = 0;
|
|
at_state->seq_index = 0;
|
|
at_state->ConState = 0;
|
|
for (i = 0; i < STR_NUM; ++i)
|
|
at_state->str_var[i] = NULL;
|
|
at_state->int_var[VAR_ZDLE] = 0;
|
|
at_state->int_var[VAR_ZCTP] = -1;
|
|
at_state->int_var[VAR_ZSAU] = ZSAU_NULL;
|
|
at_state->cs = cs;
|
|
at_state->bcs = bcs;
|
|
at_state->cid = cid;
|
|
if (!cid)
|
|
at_state->replystruct = cs->tabnocid;
|
|
else
|
|
at_state->replystruct = cs->tabcid;
|
|
}
|
|
|
|
|
|
static void gigaset_inbuf_init(struct inbuf_t *inbuf, struct cardstate *cs)
|
|
/* inbuf->read must be allocated before! */
|
|
{
|
|
inbuf->head = 0;
|
|
inbuf->tail = 0;
|
|
inbuf->cs = cs;
|
|
inbuf->inputstate = INS_command;
|
|
}
|
|
|
|
/**
|
|
* gigaset_fill_inbuf() - append received data to input buffer
|
|
* @inbuf: buffer structure.
|
|
* @src: received data.
|
|
* @numbytes: number of bytes received.
|
|
*
|
|
* Return value: !=0 if some data was appended
|
|
*/
|
|
int gigaset_fill_inbuf(struct inbuf_t *inbuf, const unsigned char *src,
|
|
unsigned numbytes)
|
|
{
|
|
unsigned n, head, tail, bytesleft;
|
|
|
|
gig_dbg(DEBUG_INTR, "received %u bytes", numbytes);
|
|
|
|
if (!numbytes)
|
|
return 0;
|
|
|
|
bytesleft = numbytes;
|
|
tail = inbuf->tail;
|
|
head = inbuf->head;
|
|
gig_dbg(DEBUG_INTR, "buffer state: %u -> %u", head, tail);
|
|
|
|
while (bytesleft) {
|
|
if (head > tail)
|
|
n = head - 1 - tail;
|
|
else if (head == 0)
|
|
n = (RBUFSIZE - 1) - tail;
|
|
else
|
|
n = RBUFSIZE - tail;
|
|
if (!n) {
|
|
dev_err(inbuf->cs->dev,
|
|
"buffer overflow (%u bytes lost)\n",
|
|
bytesleft);
|
|
break;
|
|
}
|
|
if (n > bytesleft)
|
|
n = bytesleft;
|
|
memcpy(inbuf->data + tail, src, n);
|
|
bytesleft -= n;
|
|
tail = (tail + n) % RBUFSIZE;
|
|
src += n;
|
|
}
|
|
gig_dbg(DEBUG_INTR, "setting tail to %u", tail);
|
|
inbuf->tail = tail;
|
|
return numbytes != bytesleft;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_fill_inbuf);
|
|
|
|
/* Initialize the b-channel structure */
|
|
static int gigaset_initbcs(struct bc_state *bcs, struct cardstate *cs,
|
|
int channel)
|
|
{
|
|
int i;
|
|
|
|
bcs->tx_skb = NULL;
|
|
|
|
skb_queue_head_init(&bcs->squeue);
|
|
|
|
bcs->corrupted = 0;
|
|
bcs->trans_down = 0;
|
|
bcs->trans_up = 0;
|
|
|
|
gig_dbg(DEBUG_INIT, "setting up bcs[%d]->at_state", channel);
|
|
gigaset_at_init(&bcs->at_state, bcs, cs, -1);
|
|
|
|
#ifdef CONFIG_GIGASET_DEBUG
|
|
bcs->emptycount = 0;
|
|
#endif
|
|
|
|
bcs->rx_bufsize = 0;
|
|
bcs->rx_skb = NULL;
|
|
bcs->rx_fcs = PPP_INITFCS;
|
|
bcs->inputstate = 0;
|
|
bcs->channel = channel;
|
|
bcs->cs = cs;
|
|
|
|
bcs->chstate = 0;
|
|
bcs->use_count = 1;
|
|
bcs->busy = 0;
|
|
bcs->ignore = cs->ignoreframes;
|
|
|
|
for (i = 0; i < AT_NUM; ++i)
|
|
bcs->commands[i] = NULL;
|
|
|
|
spin_lock_init(&bcs->aplock);
|
|
bcs->ap = NULL;
|
|
bcs->apconnstate = 0;
|
|
|
|
gig_dbg(DEBUG_INIT, " setting up bcs[%d]->hw", channel);
|
|
return cs->ops->initbcshw(bcs);
|
|
}
|
|
|
|
/**
|
|
* gigaset_initcs() - initialize device structure
|
|
* @drv: hardware driver the device belongs to
|
|
* @channels: number of B channels supported by device
|
|
* @onechannel: !=0 if B channel data and AT commands share one
|
|
* communication channel (M10x),
|
|
* ==0 if B channels have separate communication channels (base)
|
|
* @ignoreframes: number of frames to ignore after setting up B channel
|
|
* @cidmode: !=0: start in CallID mode
|
|
* @modulename: name of driver module for LL registration
|
|
*
|
|
* Allocate and initialize cardstate structure for Gigaset driver
|
|
* Calls hardware dependent gigaset_initcshw() function
|
|
* Calls B channel initialization function gigaset_initbcs() for each B channel
|
|
*
|
|
* Return value:
|
|
* pointer to cardstate structure
|
|
*/
|
|
struct cardstate *gigaset_initcs(struct gigaset_driver *drv, int channels,
|
|
int onechannel, int ignoreframes,
|
|
int cidmode, const char *modulename)
|
|
{
|
|
struct cardstate *cs;
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
gig_dbg(DEBUG_INIT, "allocating cs");
|
|
cs = alloc_cs(drv);
|
|
if (!cs) {
|
|
pr_err("maximum number of devices exceeded\n");
|
|
return NULL;
|
|
}
|
|
|
|
gig_dbg(DEBUG_INIT, "allocating bcs[0..%d]", channels - 1);
|
|
cs->bcs = kmalloc(channels * sizeof(struct bc_state), GFP_KERNEL);
|
|
if (!cs->bcs) {
|
|
pr_err("out of memory\n");
|
|
goto error;
|
|
}
|
|
gig_dbg(DEBUG_INIT, "allocating inbuf");
|
|
cs->inbuf = kmalloc(sizeof(struct inbuf_t), GFP_KERNEL);
|
|
if (!cs->inbuf) {
|
|
pr_err("out of memory\n");
|
|
goto error;
|
|
}
|
|
|
|
cs->cs_init = 0;
|
|
cs->channels = channels;
|
|
cs->onechannel = onechannel;
|
|
cs->ignoreframes = ignoreframes;
|
|
INIT_LIST_HEAD(&cs->temp_at_states);
|
|
cs->running = 0;
|
|
init_timer(&cs->timer); /* clear next & prev */
|
|
spin_lock_init(&cs->ev_lock);
|
|
cs->ev_tail = 0;
|
|
cs->ev_head = 0;
|
|
|
|
tasklet_init(&cs->event_tasklet, gigaset_handle_event,
|
|
(unsigned long) cs);
|
|
tty_port_init(&cs->port);
|
|
cs->commands_pending = 0;
|
|
cs->cur_at_seq = 0;
|
|
cs->gotfwver = -1;
|
|
cs->dev = NULL;
|
|
cs->tty_dev = NULL;
|
|
cs->cidmode = cidmode != 0;
|
|
cs->tabnocid = gigaset_tab_nocid;
|
|
cs->tabcid = gigaset_tab_cid;
|
|
|
|
init_waitqueue_head(&cs->waitqueue);
|
|
cs->waiting = 0;
|
|
|
|
cs->mode = M_UNKNOWN;
|
|
cs->mstate = MS_UNINITIALIZED;
|
|
|
|
++cs->cs_init;
|
|
|
|
gig_dbg(DEBUG_INIT, "setting up at_state");
|
|
spin_lock_init(&cs->lock);
|
|
gigaset_at_init(&cs->at_state, NULL, cs, 0);
|
|
cs->dle = 0;
|
|
cs->cbytes = 0;
|
|
|
|
gig_dbg(DEBUG_INIT, "setting up inbuf");
|
|
gigaset_inbuf_init(cs->inbuf, cs);
|
|
|
|
cs->connected = 0;
|
|
cs->isdn_up = 0;
|
|
|
|
gig_dbg(DEBUG_INIT, "setting up cmdbuf");
|
|
cs->cmdbuf = cs->lastcmdbuf = NULL;
|
|
spin_lock_init(&cs->cmdlock);
|
|
cs->curlen = 0;
|
|
cs->cmdbytes = 0;
|
|
|
|
gig_dbg(DEBUG_INIT, "setting up iif");
|
|
if (gigaset_isdn_regdev(cs, modulename) < 0) {
|
|
pr_err("error registering ISDN device\n");
|
|
goto error;
|
|
}
|
|
|
|
make_valid(cs, VALID_ID);
|
|
++cs->cs_init;
|
|
gig_dbg(DEBUG_INIT, "setting up hw");
|
|
if (cs->ops->initcshw(cs) < 0)
|
|
goto error;
|
|
|
|
++cs->cs_init;
|
|
|
|
/* set up character device */
|
|
gigaset_if_init(cs);
|
|
|
|
/* set up device sysfs */
|
|
gigaset_init_dev_sysfs(cs);
|
|
|
|
/* set up channel data structures */
|
|
for (i = 0; i < channels; ++i) {
|
|
gig_dbg(DEBUG_INIT, "setting up bcs[%d]", i);
|
|
if (gigaset_initbcs(cs->bcs + i, cs, i) < 0) {
|
|
pr_err("could not allocate channel %d data\n", i);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->running = 1;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
setup_timer(&cs->timer, timer_tick, (unsigned long) cs);
|
|
cs->timer.expires = jiffies + msecs_to_jiffies(GIG_TICK);
|
|
add_timer(&cs->timer);
|
|
|
|
gig_dbg(DEBUG_INIT, "cs initialized");
|
|
return cs;
|
|
|
|
error:
|
|
gig_dbg(DEBUG_INIT, "failed");
|
|
gigaset_freecs(cs);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_initcs);
|
|
|
|
/* ReInitialize the b-channel structure on hangup */
|
|
void gigaset_bcs_reinit(struct bc_state *bcs)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct cardstate *cs = bcs->cs;
|
|
unsigned long flags;
|
|
|
|
while ((skb = skb_dequeue(&bcs->squeue)) != NULL)
|
|
dev_kfree_skb(skb);
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
clear_at_state(&bcs->at_state);
|
|
bcs->at_state.ConState = 0;
|
|
bcs->at_state.timer_active = 0;
|
|
bcs->at_state.timer_expires = 0;
|
|
bcs->at_state.cid = -1; /* No CID defined */
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
|
|
bcs->inputstate = 0;
|
|
|
|
#ifdef CONFIG_GIGASET_DEBUG
|
|
bcs->emptycount = 0;
|
|
#endif
|
|
|
|
bcs->rx_fcs = PPP_INITFCS;
|
|
bcs->chstate = 0;
|
|
|
|
bcs->ignore = cs->ignoreframes;
|
|
dev_kfree_skb(bcs->rx_skb);
|
|
bcs->rx_skb = NULL;
|
|
|
|
cs->ops->reinitbcshw(bcs);
|
|
}
|
|
|
|
static void cleanup_cs(struct cardstate *cs)
|
|
{
|
|
struct cmdbuf_t *cb, *tcb;
|
|
int i;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
|
|
cs->mode = M_UNKNOWN;
|
|
cs->mstate = MS_UNINITIALIZED;
|
|
|
|
clear_at_state(&cs->at_state);
|
|
dealloc_temp_at_states(cs);
|
|
gigaset_at_init(&cs->at_state, NULL, cs, 0);
|
|
|
|
cs->inbuf->inputstate = INS_command;
|
|
cs->inbuf->head = 0;
|
|
cs->inbuf->tail = 0;
|
|
|
|
cb = cs->cmdbuf;
|
|
while (cb) {
|
|
tcb = cb;
|
|
cb = cb->next;
|
|
kfree(tcb);
|
|
}
|
|
cs->cmdbuf = cs->lastcmdbuf = NULL;
|
|
cs->curlen = 0;
|
|
cs->cmdbytes = 0;
|
|
cs->gotfwver = -1;
|
|
cs->dle = 0;
|
|
cs->cur_at_seq = 0;
|
|
cs->commands_pending = 0;
|
|
cs->cbytes = 0;
|
|
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
|
|
for (i = 0; i < cs->channels; ++i) {
|
|
gigaset_freebcs(cs->bcs + i);
|
|
if (gigaset_initbcs(cs->bcs + i, cs, i) < 0)
|
|
pr_err("could not allocate channel %d data\n", i);
|
|
}
|
|
|
|
if (cs->waiting) {
|
|
cs->cmd_result = -ENODEV;
|
|
cs->waiting = 0;
|
|
wake_up_interruptible(&cs->waitqueue);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* gigaset_start() - start device operations
|
|
* @cs: device descriptor structure.
|
|
*
|
|
* Prepares the device for use by setting up communication parameters,
|
|
* scheduling an EV_START event to initiate device initialization, and
|
|
* waiting for completion of the initialization.
|
|
*
|
|
* Return value:
|
|
* 0 on success, error code < 0 on failure
|
|
*/
|
|
int gigaset_start(struct cardstate *cs)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (mutex_lock_interruptible(&cs->mutex))
|
|
return -EBUSY;
|
|
|
|
spin_lock_irqsave(&cs->lock, flags);
|
|
cs->connected = 1;
|
|
spin_unlock_irqrestore(&cs->lock, flags);
|
|
|
|
if (cs->mstate != MS_LOCKED) {
|
|
cs->ops->set_modem_ctrl(cs, 0, TIOCM_DTR | TIOCM_RTS);
|
|
cs->ops->baud_rate(cs, B115200);
|
|
cs->ops->set_line_ctrl(cs, CS8);
|
|
cs->control_state = TIOCM_DTR | TIOCM_RTS;
|
|
}
|
|
|
|
cs->waiting = 1;
|
|
|
|
if (!gigaset_add_event(cs, &cs->at_state, EV_START, NULL, 0, NULL)) {
|
|
cs->waiting = 0;
|
|
goto error;
|
|
}
|
|
gigaset_schedule_event(cs);
|
|
|
|
wait_event(cs->waitqueue, !cs->waiting);
|
|
|
|
mutex_unlock(&cs->mutex);
|
|
return 0;
|
|
|
|
error:
|
|
mutex_unlock(&cs->mutex);
|
|
return -ENOMEM;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_start);
|
|
|
|
/**
|
|
* gigaset_shutdown() - shut down device operations
|
|
* @cs: device descriptor structure.
|
|
*
|
|
* Deactivates the device by scheduling an EV_SHUTDOWN event and
|
|
* waiting for completion of the shutdown.
|
|
*
|
|
* Return value:
|
|
* 0 - success, -ENODEV - error (no device associated)
|
|
*/
|
|
int gigaset_shutdown(struct cardstate *cs)
|
|
{
|
|
mutex_lock(&cs->mutex);
|
|
|
|
if (!(cs->flags & VALID_MINOR)) {
|
|
mutex_unlock(&cs->mutex);
|
|
return -ENODEV;
|
|
}
|
|
|
|
cs->waiting = 1;
|
|
|
|
if (!gigaset_add_event(cs, &cs->at_state, EV_SHUTDOWN, NULL, 0, NULL))
|
|
goto exit;
|
|
gigaset_schedule_event(cs);
|
|
|
|
wait_event(cs->waitqueue, !cs->waiting);
|
|
|
|
cleanup_cs(cs);
|
|
|
|
exit:
|
|
mutex_unlock(&cs->mutex);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_shutdown);
|
|
|
|
/**
|
|
* gigaset_stop() - stop device operations
|
|
* @cs: device descriptor structure.
|
|
*
|
|
* Stops operations on the device by scheduling an EV_STOP event and
|
|
* waiting for completion of the shutdown.
|
|
*/
|
|
void gigaset_stop(struct cardstate *cs)
|
|
{
|
|
mutex_lock(&cs->mutex);
|
|
|
|
cs->waiting = 1;
|
|
|
|
if (!gigaset_add_event(cs, &cs->at_state, EV_STOP, NULL, 0, NULL))
|
|
goto exit;
|
|
gigaset_schedule_event(cs);
|
|
|
|
wait_event(cs->waitqueue, !cs->waiting);
|
|
|
|
cleanup_cs(cs);
|
|
|
|
exit:
|
|
mutex_unlock(&cs->mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_stop);
|
|
|
|
static LIST_HEAD(drivers);
|
|
static DEFINE_SPINLOCK(driver_lock);
|
|
|
|
struct cardstate *gigaset_get_cs_by_id(int id)
|
|
{
|
|
unsigned long flags;
|
|
struct cardstate *ret = NULL;
|
|
struct cardstate *cs;
|
|
struct gigaset_driver *drv;
|
|
unsigned i;
|
|
|
|
spin_lock_irqsave(&driver_lock, flags);
|
|
list_for_each_entry(drv, &drivers, list) {
|
|
spin_lock(&drv->lock);
|
|
for (i = 0; i < drv->minors; ++i) {
|
|
cs = drv->cs + i;
|
|
if ((cs->flags & VALID_ID) && cs->myid == id) {
|
|
ret = cs;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&drv->lock);
|
|
if (ret)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&driver_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
static struct cardstate *gigaset_get_cs_by_minor(unsigned minor)
|
|
{
|
|
unsigned long flags;
|
|
struct cardstate *ret = NULL;
|
|
struct gigaset_driver *drv;
|
|
unsigned index;
|
|
|
|
spin_lock_irqsave(&driver_lock, flags);
|
|
list_for_each_entry(drv, &drivers, list) {
|
|
if (minor < drv->minor || minor >= drv->minor + drv->minors)
|
|
continue;
|
|
index = minor - drv->minor;
|
|
spin_lock(&drv->lock);
|
|
if (drv->cs[index].flags & VALID_MINOR)
|
|
ret = drv->cs + index;
|
|
spin_unlock(&drv->lock);
|
|
if (ret)
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&driver_lock, flags);
|
|
return ret;
|
|
}
|
|
|
|
struct cardstate *gigaset_get_cs_by_tty(struct tty_struct *tty)
|
|
{
|
|
return gigaset_get_cs_by_minor(tty->index + tty->driver->minor_start);
|
|
}
|
|
|
|
/**
|
|
* gigaset_freedriver() - free all associated ressources of a driver
|
|
* @drv: driver descriptor structure.
|
|
*
|
|
* Unregisters the driver from the system and deallocates the driver
|
|
* structure @drv and all structures referenced from it.
|
|
* All devices should be shut down before calling this.
|
|
*/
|
|
void gigaset_freedriver(struct gigaset_driver *drv)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&driver_lock, flags);
|
|
list_del(&drv->list);
|
|
spin_unlock_irqrestore(&driver_lock, flags);
|
|
|
|
gigaset_if_freedriver(drv);
|
|
|
|
kfree(drv->cs);
|
|
kfree(drv);
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_freedriver);
|
|
|
|
/**
|
|
* gigaset_initdriver() - initialize driver structure
|
|
* @minor: First minor number
|
|
* @minors: Number of minors this driver can handle
|
|
* @procname: Name of the driver
|
|
* @devname: Name of the device files (prefix without minor number)
|
|
*
|
|
* Allocate and initialize gigaset_driver structure. Initialize interface.
|
|
*
|
|
* Return value:
|
|
* Pointer to the gigaset_driver structure on success, NULL on failure.
|
|
*/
|
|
struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
|
|
const char *procname,
|
|
const char *devname,
|
|
const struct gigaset_ops *ops,
|
|
struct module *owner)
|
|
{
|
|
struct gigaset_driver *drv;
|
|
unsigned long flags;
|
|
unsigned i;
|
|
|
|
drv = kmalloc(sizeof *drv, GFP_KERNEL);
|
|
if (!drv)
|
|
return NULL;
|
|
|
|
drv->have_tty = 0;
|
|
drv->minor = minor;
|
|
drv->minors = minors;
|
|
spin_lock_init(&drv->lock);
|
|
drv->blocked = 0;
|
|
drv->ops = ops;
|
|
drv->owner = owner;
|
|
INIT_LIST_HEAD(&drv->list);
|
|
|
|
drv->cs = kmalloc(minors * sizeof *drv->cs, GFP_KERNEL);
|
|
if (!drv->cs)
|
|
goto error;
|
|
|
|
for (i = 0; i < minors; ++i) {
|
|
drv->cs[i].flags = 0;
|
|
drv->cs[i].driver = drv;
|
|
drv->cs[i].ops = drv->ops;
|
|
drv->cs[i].minor_index = i;
|
|
mutex_init(&drv->cs[i].mutex);
|
|
}
|
|
|
|
gigaset_if_initdriver(drv, procname, devname);
|
|
|
|
spin_lock_irqsave(&driver_lock, flags);
|
|
list_add(&drv->list, &drivers);
|
|
spin_unlock_irqrestore(&driver_lock, flags);
|
|
|
|
return drv;
|
|
|
|
error:
|
|
kfree(drv->cs);
|
|
kfree(drv);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_initdriver);
|
|
|
|
/**
|
|
* gigaset_blockdriver() - block driver
|
|
* @drv: driver descriptor structure.
|
|
*
|
|
* Prevents the driver from attaching new devices, in preparation for
|
|
* deregistration.
|
|
*/
|
|
void gigaset_blockdriver(struct gigaset_driver *drv)
|
|
{
|
|
drv->blocked = 1;
|
|
}
|
|
EXPORT_SYMBOL_GPL(gigaset_blockdriver);
|
|
|
|
static int __init gigaset_init_module(void)
|
|
{
|
|
/* in accordance with the principle of least astonishment,
|
|
* setting the 'debug' parameter to 1 activates a sensible
|
|
* set of default debug levels
|
|
*/
|
|
if (gigaset_debuglevel == 1)
|
|
gigaset_debuglevel = DEBUG_DEFAULT;
|
|
|
|
pr_info(DRIVER_DESC DRIVER_DESC_DEBUG "\n");
|
|
gigaset_isdn_regdrv();
|
|
return 0;
|
|
}
|
|
|
|
static void __exit gigaset_exit_module(void)
|
|
{
|
|
gigaset_isdn_unregdrv();
|
|
}
|
|
|
|
module_init(gigaset_init_module);
|
|
module_exit(gigaset_exit_module);
|
|
|
|
MODULE_AUTHOR(DRIVER_AUTHOR);
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|
|
|
|
MODULE_LICENSE("GPL");
|