/********************************************************************* * * Filename: irda_device.c * Version: 0.9 * Description: Utility functions used by the device drivers * Status: Experimental. * Author: Dag Brattli * Created at: Sat Oct 9 09:22:27 1999 * Modified at: Sun Jan 23 17:41:24 2000 * Modified by: Dag Brattli * * Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved. * Copyright (c) 2000-2001 Jean Tourrilhes * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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); extern int mcp2120_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 * Note : non-modular IrDA is not supported in 2.4.X, so don't * waste too much time fixing this code. If you require it, please * upgrade to the IrDA stack in 2.5.X. Jean II */ #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_OLD 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 #ifdef CONFIG_MCP2120_DONGLE mcp2120_init(); #endif return 0; } void irda_device_cleanup(void) { IRDA_DEBUG(4, "%s()\n", __FUNCTION__); 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, "%s(%s)\n", __FUNCTION__, 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, "%s()\n", __FUNCTION__); if (!dev->do_ioctl) { ERROR("%s(), do_ioctl not impl. by " "device driver\n", __FUNCTION__); 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, "%s()\n", __FUNCTION__); if (!dev->do_ioctl) { ERROR("%s(), do_ioctl not impl. by " "device driver\n", __FUNCTION__); 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, "%s()\n", __FUNCTION__); if (!dev->do_ioctl) { ERROR("%s(), do_ioctl not impl. by " "device driver\n", __FUNCTION__); 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, "%s(), state = %s\n", __FUNCTION__, 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, "%s()\n", __FUNCTION__); 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("%s(), error in task handler!\n", __FUNCTION__); irda_task_delete(task); return TRUE; } } while ((timeout == 0) && (task->state != IRDA_TASK_DONE)); if (timeout < 0) { ERROR("%s(), Error executing task!\n", __FUNCTION__); 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, "%s(), not finished, and no timeout!\n", __FUNCTION__); 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() * Two important notes : * o Make sure you irda_task_delete(task); in case you delete the * calling instance. * o No real need to lock when calling this function, but you may * want to lock within the task handler. * Jean II */ 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, "%s()\n", __FUNCTION__); 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, "%s()\n", __FUNCTION__); 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. * * Important : request_module require us to call this function with * a process context and irq enabled. - Jean II */ 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]; ASSERT(!in_interrupt(), return NULL;); /* 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("%s(), Dongle already registered\n", __FUNCTION__); 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("%s(), dongle not found!\n", __FUNCTION__); 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, "%s()\n", __FUNCTION__); if (!dev->do_ioctl) { ERROR("%s(), set_raw_mode not impl. by " "device driver\n", __FUNCTION__); 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); }