irda_device.c
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- /*********************************************************************
- *
- * 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 drivern");
- 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 drivern");
- 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 drivern");
- 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 = %sn", 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 donglen");
- 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 registeredn");
- 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 drivern");
- 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);
- }