Viewing file:  irda_device.c (13.5 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/*********************************************************************
*
* Filename: irda_device.c
* Version: 0.9
* Description: Utility functions used by the device drivers
* Status: Experimental.
* Author: Dag Brattli <dagb@cs.uit.no>
* Created at: Sat Oct 9 09:22:27 1999
* Modified at: Sun Jan 23 17:41:24 2000
* Modified by: Dag Brattli <dagb@cs.uit.no>
*
* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
* Copyright (c) 2000-2001 Jean Tourrilhes <jt@hpl.hp.com>
*
* 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
********************************************************************/
#include <linux/config.h>
#include <linux/string.h>
#include <linux/proc_fs.h>
#include <linux/skbuff.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/if_arp.h>
#include <linux/netdevice.h>
#include <linux/init.h>
#include <linux/tty.h>
#include <linux/kmod.h>
#include <linux/wireless.h>
#include <linux/spinlock.h>
#include <asm/ioctls.h>
#include <asm/segment.h>
#include <asm/uaccess.h>
#include <asm/dma.h>
#include <asm/io.h>
#include <net/pkt_sched.h>
#include <net/irda/irda_device.h>
#include <net/irda/irlap.h>
#include <net/irda/timer.h>
#include <net/irda/wrapper.h>
extern int irtty_init(void);
extern int nsc_ircc_init(void);
extern int ircc_init(void);
extern int toshoboe_init(void);
extern int litelink_init(void);
extern int w83977af_init(void);
extern int esi_init(void);
extern int tekram_init(void);
extern int actisys_init(void);
extern int girbil_init(void);
extern int sa1100_irda_init(void);
extern int ep7211_ir_init(void);
static void __irda_task_delete(struct irda_task *task);
static hashbin_t *dongles = NULL;
static hashbin_t *tasks = NULL;
const char *infrared_mode[] = {
"IRDA_IRLAP",
"IRDA_RAW",
"SHARP_ASK",
"TV_REMOTE",
};
#ifdef CONFIG_IRDA_DEBUG
static const char *task_state[] = {
"IRDA_TASK_INIT",
"IRDA_TASK_DONE",
"IRDA_TASK_WAIT",
"IRDA_TASK_WAIT1",
"IRDA_TASK_WAIT2",
"IRDA_TASK_WAIT3",
"IRDA_TASK_CHILD_INIT",
"IRDA_TASK_CHILD_WAIT",
"IRDA_TASK_CHILD_DONE",
};
#endif /* CONFIG_IRDA_DEBUG */
static void irda_task_timer_expired(void *data);
#ifdef CONFIG_PROC_FS
int irda_device_proc_read(char *buf, char **start, off_t offset, int len,
int unused);
#endif /* CONFIG_PROC_FS */
int __init irda_device_init( void)
{
dongles = hashbin_new(HB_GLOBAL);
if (dongles == NULL) {
printk(KERN_WARNING
"IrDA: Can't allocate dongles hashbin!\n");
return -ENOMEM;
}
tasks = hashbin_new(HB_GLOBAL);
if (tasks == NULL) {
printk(KERN_WARNING
"IrDA: Can't allocate tasks hashbin!\n");
return -ENOMEM;
}
/*
* Call the init function of the device drivers that has not been
* compiled as a module
*/
#ifdef CONFIG_IRTTY_SIR
irtty_init();
#endif
#ifdef CONFIG_WINBOND_FIR
w83977af_init();
#endif
#ifdef CONFIG_SA1100_FIR
sa1100_irda_init();
#endif
#ifdef CONFIG_NSC_FIR
nsc_ircc_init();
#endif
#ifdef CONFIG_TOSHIBA_FIR
toshoboe_init();
#endif
#ifdef CONFIG_SMC_IRCC_FIR
ircc_init();
#endif
#ifdef CONFIG_ESI_DONGLE
esi_init();
#endif
#ifdef CONFIG_TEKRAM_DONGLE
tekram_init();
#endif
#ifdef CONFIG_ACTISYS_DONGLE
actisys_init();
#endif
#ifdef CONFIG_GIRBIL_DONGLE
girbil_init();
#endif
#ifdef CONFIG_LITELINK_DONGLE
litelink_init();
#endif
#ifdef CONFIG_OLD_BELKIN
old_belkin_init();
#endif
#ifdef CONFIG_EP7211_IR
ep7211_ir_init();
#endif
return 0;
}
void irda_device_cleanup(void)
{
IRDA_DEBUG(4, __FUNCTION__ "()\n");
hashbin_delete(tasks, (FREE_FUNC) __irda_task_delete);
hashbin_delete(dongles, NULL);
}
/*
* Function irda_device_set_media_busy (self, status)
*
* Called when we have detected that another station is transmiting
* in contention mode.
*/
void irda_device_set_media_busy(struct net_device *dev, int status)
{
struct irlap_cb *self;
IRDA_DEBUG(4, __FUNCTION__ "(%s)\n", status ? "TRUE" : "FALSE");
self = (struct irlap_cb *) dev->atalk_ptr;
ASSERT(self != NULL, return;);
ASSERT(self->magic == LAP_MAGIC, return;);
if (status) {
self->media_busy = TRUE;
if (status == SMALL)
irlap_start_mbusy_timer(self, SMALLBUSY_TIMEOUT);
else
irlap_start_mbusy_timer(self, MEDIABUSY_TIMEOUT);
IRDA_DEBUG( 4, "Media busy!\n");
} else {
self->media_busy = FALSE;
irlap_stop_mbusy_timer(self);
}
}
int irda_device_set_dtr_rts(struct net_device *dev, int dtr, int rts)
{
struct if_irda_req req;
int ret;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
if (!dev->do_ioctl) {
ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
"device driver\n");
return -1;
}
req.ifr_dtr = dtr;
req.ifr_rts = rts;
ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSDTRRTS);
return ret;
}
int irda_device_change_speed(struct net_device *dev, __u32 speed)
{
struct if_irda_req req;
int ret;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
if (!dev->do_ioctl) {
ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
"device driver\n");
return -1;
}
req.ifr_baudrate = speed;
ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSBANDWIDTH);
return ret;
}
/*
* Function irda_device_is_receiving (dev)
*
* Check if the device driver is currently receiving data
*
*/
int irda_device_is_receiving(struct net_device *dev)
{
struct if_irda_req req;
int ret;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
if (!dev->do_ioctl) {
ERROR(__FUNCTION__ "(), do_ioctl not impl. by "
"device driver\n");
return -1;
}
ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCGRECEIVING);
if (ret < 0)
return ret;
return req.ifr_receiving;
}
void irda_task_next_state(struct irda_task *task, IRDA_TASK_STATE state)
{
IRDA_DEBUG(2, __FUNCTION__ "(), state = %s\n", task_state[state]);
task->state = state;
}
static void __irda_task_delete(struct irda_task *task)
{
del_timer(&task->timer);
kfree(task);
}
void irda_task_delete(struct irda_task *task)
{
/* Unregister task */
hashbin_remove(tasks, (int) task, NULL);
__irda_task_delete(task);
}
/*
* Function irda_task_kick (task)
*
* Tries to execute a task possible multiple times until the task is either
* finished, or askes for a timeout. When a task is finished, we do post
* processing, and notify the parent task, that is waiting for this task
* to complete.
*/
int irda_task_kick(struct irda_task *task)
{
int finished = TRUE;
int count = 0;
int timeout;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
ASSERT(task != NULL, return -1;);
ASSERT(task->magic == IRDA_TASK_MAGIC, return -1;);
/* Execute task until it's finished, or askes for a timeout */
do {
timeout = task->function(task);
if (count++ > 100) {
ERROR(__FUNCTION__ "(), error in task handler!\n");
irda_task_delete(task);
return TRUE;
}
} while ((timeout == 0) && (task->state != IRDA_TASK_DONE));
if (timeout < 0) {
ERROR(__FUNCTION__ "(), Error executing task!\n");
irda_task_delete(task);
return TRUE;
}
/* Check if we are finished */
if (task->state == IRDA_TASK_DONE) {
del_timer(&task->timer);
/* Do post processing */
if (task->finished)
task->finished(task);
/* Notify parent */
if (task->parent) {
/* Check if parent is waiting for us to complete */
if (task->parent->state == IRDA_TASK_CHILD_WAIT) {
task->parent->state = IRDA_TASK_CHILD_DONE;
/* Stop timer now that we are here */
del_timer(&task->parent->timer);
/* Kick parent task */
irda_task_kick(task->parent);
}
}
irda_task_delete(task);
} else if (timeout > 0) {
irda_start_timer(&task->timer, timeout, (void *) task,
irda_task_timer_expired);
finished = FALSE;
} else {
IRDA_DEBUG(0, __FUNCTION__
"(), not finished, and no timeout!\n");
finished = FALSE;
}
return finished;
}
/*
* Function irda_task_execute (instance, function, finished)
*
* This function registers and tries to execute tasks that may take some
* time to complete. We do it this hairy way since we may have been
* called from interrupt context, so it's not possible to use
* schedule_timeout()
*/
struct irda_task *irda_task_execute(void *instance,
IRDA_TASK_CALLBACK function,
IRDA_TASK_CALLBACK finished,
struct irda_task *parent, void *param)
{
struct irda_task *task;
int ret;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
task = kmalloc(sizeof(struct irda_task), GFP_ATOMIC);
if (!task)
return NULL;
task->state = IRDA_TASK_INIT;
task->instance = instance;
task->function = function;
task->finished = finished;
task->parent = parent;
task->param = param;
task->magic = IRDA_TASK_MAGIC;
init_timer(&task->timer);
/* Register task */
hashbin_insert(tasks, (irda_queue_t *) task, (int) task, NULL);
/* No time to waste, so lets get going! */
ret = irda_task_kick(task);
if (ret)
return NULL;
else
return task;
}
/*
* Function irda_task_timer_expired (data)
*
* Task time has expired. We now try to execute task (again), and restart
* the timer if the task has not finished yet
*/
static void irda_task_timer_expired(void *data)
{
struct irda_task *task;
IRDA_DEBUG(2, __FUNCTION__ "()\n");
task = (struct irda_task *) data;
irda_task_kick(task);
}
/*
* Function irda_device_setup (dev)
*
* This function should be used by low level device drivers in a similar way
* as ether_setup() is used by normal network device drivers
*/
int irda_device_setup(struct net_device *dev)
{
ASSERT(dev != NULL, return -1;);
dev->hard_header_len = 0;
dev->addr_len = 0;
dev->features |= NETIF_F_DYNALLOC;
/* dev->destructor = irda_device_destructor; */
dev->type = ARPHRD_IRDA;
dev->tx_queue_len = 8; /* Window size + 1 s-frame */
memset(dev->broadcast, 0xff, 4);
dev->mtu = 2048;
dev->flags = IFF_NOARP;
return 0;
}
/*
* Function irda_device_txqueue_empty (dev)
*
* Check if there is still some frames in the transmit queue for this
* device. Maybe we should use: q->q.qlen == 0.
*
*/
int irda_device_txqueue_empty(struct net_device *dev)
{
if (skb_queue_len(&dev->qdisc->q))
return FALSE;
return TRUE;
}
/*
* Function irda_device_init_dongle (self, type, qos)
*
* Initialize attached dongle.
*/
dongle_t *irda_device_dongle_init(struct net_device *dev, int type)
{
struct dongle_reg *reg;
dongle_t *dongle;
ASSERT(dev != NULL, return NULL;);
#ifdef CONFIG_KMOD
{
char modname[32];
/* Try to load the module needed */
sprintf(modname, "irda-dongle-%d", type);
request_module(modname);
}
#endif /* CONFIG_KMOD */
if (!(reg = hashbin_find(dongles, type, NULL))) {
ERROR("IrDA: Unable to find requested dongle\n");
return NULL;
}
/* Allocate dongle info for this instance */
dongle = kmalloc(sizeof(dongle_t), GFP_KERNEL);
if (!dongle)
return NULL;
memset(dongle, 0, sizeof(dongle_t));
/* Bind the registration info to this particular instance */
dongle->issue = reg;
dongle->dev = dev;
return dongle;
}
/*
* Function irda_device_dongle_cleanup (dongle)
*
*
*
*/
int irda_device_dongle_cleanup(dongle_t *dongle)
{
ASSERT(dongle != NULL, return -1;);
dongle->issue->close(dongle);
kfree(dongle);
return 0;
}
/*
* Function irda_device_register_dongle (dongle)
*
*
*
*/
int irda_device_register_dongle(struct dongle_reg *new)
{
/* Check if this dongle has been registred before */
if (hashbin_find(dongles, new->type, NULL)) {
MESSAGE(__FUNCTION__ "(), Dongle already registered\n");
return 0;
}
/* Insert IrDA dongle into hashbin */
hashbin_insert(dongles, (irda_queue_t *) new, new->type, NULL);
return 0;
}
/*
* Function irda_device_unregister_dongle (dongle)
*
* Unregister dongle, and remove dongle from list of registred dongles
*
*/
void irda_device_unregister_dongle(struct dongle_reg *dongle)
{
struct dongle *node;
node = hashbin_remove(dongles, dongle->type, NULL);
if (!node) {
ERROR(__FUNCTION__ "(), dongle not found!\n");
return;
}
}
/*
* Function irda_device_set_mode (self, mode)
*
* Set the Infrared device driver into mode where it sends and receives
* data without using IrLAP framing. Check out the particular device
* driver to find out which modes it support.
*/
int irda_device_set_mode(struct net_device* dev, int mode)
{
struct if_irda_req req;
int ret;
IRDA_DEBUG(0, __FUNCTION__ "()\n");
if (!dev->do_ioctl) {
ERROR(__FUNCTION__ "(), set_raw_mode not impl. by "
"device driver\n");
return -1;
}
req.ifr_mode = mode;
ret = dev->do_ioctl(dev, (struct ifreq *) &req, SIOCSMODE);
return ret;
}
/*
* Function setup_dma (idev, buffer, count, mode)
*
* Setup the DMA channel. Commonly used by ISA FIR drivers
*
*/
void setup_dma(int channel, char *buffer, int count, int mode)
{
unsigned long flags;
flags = claim_dma_lock();
disable_dma(channel);
clear_dma_ff(channel);
set_dma_mode(channel, mode);
set_dma_addr(channel, virt_to_bus(buffer));
set_dma_count(channel, count);
enable_dma(channel);
release_dma_lock(flags);
}
|