Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 489 insertions, 0 deletions

diff --git a/net/irda/irda_device.c b/net/irda/irda_device.c
new file mode 100644
index 000000000000..fda299e300c0
--- /dev/null
+++ b/net/irda/irda_device.c
@@ -0,0 +1,489 @@
+/*********************************************************************
+ *
+ * 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/spinlock.h>
+
+#include <asm/ioctls.h>
+#include <asm/uaccess.h>
+#include <asm/dma.h>
+#include <asm/io.h>
+
+#include <net/irda/irda_device.h>
+#include <net/irda/irlap.h>
+#include <net/irda/timer.h>
+#include <net/irda/wrapper.h>
+
+static void __irda_task_delete(struct irda_task *task);
+
+static hashbin_t *dongles = NULL;
+static hashbin_t *tasks = NULL;
+
+#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);
+
+int __init irda_device_init( void)
+{
+        dongles = hashbin_new(HB_NOLOCK);
+        if (dongles == NULL) {
+                IRDA_WARNING("IrDA: Can't allocate dongles hashbin!\n");
+                return -ENOMEM;
+        }
+        spin_lock_init(&dongles->hb_spinlock);
+
+        tasks = hashbin_new(HB_LOCK);
+        if (tasks == NULL) {
+                IRDA_WARNING("IrDA: Can't allocate tasks hashbin!\n");
+                hashbin_delete(dongles, NULL);
+                return -ENOMEM;
+        }
+
+        /* We no longer initialise the driver ourselves here, we let
+         * the system do it for us... - Jean II */
+
+        return 0;
+}
+
+static void __exit leftover_dongle(void *arg)
+{
+        struct dongle_reg *reg = arg;
+        IRDA_WARNING("IrDA: Dongle type %x not unregistered\n",
+                     reg->type);
+}
+
+void __exit irda_device_cleanup(void)
+{
+        IRDA_DEBUG(4, "%s()\n", __FUNCTION__);
+
+        hashbin_delete(tasks, (FREE_FUNC) __irda_task_delete);
+
+        hashbin_delete(dongles, leftover_dongle);
+}
+
+/*
+ * Function irda_device_set_media_busy (self, status)
+ *
+ *    Called when we have detected that another station is transmitting
+ *    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;
+
+        IRDA_ASSERT(self != NULL, return;);
+        IRDA_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);
+        }
+}
+EXPORT_SYMBOL(irda_device_set_media_busy);
+
+
+/*
+ * 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) {
+                IRDA_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;
+}
+EXPORT_SYMBOL(irda_task_next_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, (long) task, NULL);
+
+        __irda_task_delete(task);
+}
+EXPORT_SYMBOL(irda_task_delete);
+
+/*
+ * 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.
+ */
+static int irda_task_kick(struct irda_task *task)
+{
+        int finished = TRUE;
+        int count = 0;
+        int timeout;
+
+        IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
+
+        IRDA_ASSERT(task != NULL, return -1;);
+        IRDA_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) {
+                        IRDA_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) {
+                IRDA_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;
+
+        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, (long) task, NULL);
+
+        /* No time to waste, so lets get going! */
+        return irda_task_kick(task) ? NULL : task;
+}
+EXPORT_SYMBOL(irda_task_execute);
+
+/*
+ * 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
+ */
+static void irda_device_setup(struct net_device *dev)
+{
+        dev->hard_header_len = 0;
+        dev->addr_len        = 0;
+
+        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;
+}
+
+/*
+ * Funciton  alloc_irdadev 
+ *      Allocates and sets up an IRDA device in a manner similar to
+ *      alloc_etherdev.
+ */
+struct net_device *alloc_irdadev(int sizeof_priv)
+{
+        return alloc_netdev(sizeof_priv, "irda%d", irda_device_setup);
+}
+EXPORT_SYMBOL(alloc_irdadev);
+
+/*
+ * 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 = NULL;
+
+        might_sleep();
+
+        spin_lock(&dongles->hb_spinlock);
+        reg = hashbin_find(dongles, type, NULL);
+
+#ifdef CONFIG_KMOD
+        /* Try to load the module needed */
+        if (!reg && capable(CAP_SYS_MODULE)) {
+                spin_unlock(&dongles->hb_spinlock);
+        
+                request_module("irda-dongle-%d", type);
+                
+                spin_lock(&dongles->hb_spinlock);
+                reg = hashbin_find(dongles, type, NULL);
+        }
+#endif
+
+        if (!reg || !try_module_get(reg->owner) ) {
+                IRDA_ERROR("IrDA: Unable to find requested dongle type %x\n",
+                           type);
+                goto out;
+        }
+
+        /* Allocate dongle info for this instance */
+        dongle = kmalloc(sizeof(dongle_t), GFP_KERNEL);
+        if (!dongle)
+                goto out;
+
+        memset(dongle, 0, sizeof(dongle_t));
+
+        /* Bind the registration info to this particular instance */
+        dongle->issue = reg;
+        dongle->dev = dev;
+
+ out:
+        spin_unlock(&dongles->hb_spinlock);
+        return dongle;
+}
+EXPORT_SYMBOL(irda_device_dongle_init);
+
+/*
+ * Function irda_device_dongle_cleanup (dongle)
+ */
+int irda_device_dongle_cleanup(dongle_t *dongle)
+{
+        IRDA_ASSERT(dongle != NULL, return -1;);
+
+        dongle->issue->close(dongle);
+        module_put(dongle->issue->owner);
+        kfree(dongle);
+
+        return 0;
+}
+EXPORT_SYMBOL(irda_device_dongle_cleanup);
+
+/*
+ * Function irda_device_register_dongle (dongle)
+ */
+int irda_device_register_dongle(struct dongle_reg *new)
+{
+        spin_lock(&dongles->hb_spinlock);
+        /* Check if this dongle has been registered before */
+        if (hashbin_find(dongles, new->type, NULL)) {
+                IRDA_MESSAGE("%s: Dongle type %x already registered\n", 
+                             __FUNCTION__, new->type);
+        } else {
+                /* Insert IrDA dongle into hashbin */
+                hashbin_insert(dongles, (irda_queue_t *) new, new->type, NULL);
+        }
+        spin_unlock(&dongles->hb_spinlock);
+
+        return 0;
+}
+EXPORT_SYMBOL(irda_device_register_dongle);
+
+/*
+ * Function irda_device_unregister_dongle (dongle)
+ *
+ *    Unregister dongle, and remove dongle from list of registered dongles
+ *
+ */
+void irda_device_unregister_dongle(struct dongle_reg *dongle)
+{
+        struct dongle *node;
+
+        spin_lock(&dongles->hb_spinlock);
+        node = hashbin_remove(dongles, dongle->type, NULL);
+        if (!node) 
+                IRDA_ERROR("%s: dongle not found!\n", __FUNCTION__);
+        spin_unlock(&dongles->hb_spinlock);
+}
+EXPORT_SYMBOL(irda_device_unregister_dongle);
+
+#ifdef CONFIG_ISA
+/*
+ * Function setup_dma (idev, buffer, count, mode)
+ *
+ *    Setup the DMA channel. Commonly used by ISA FIR drivers
+ *
+ */
+void irda_setup_dma(int channel, dma_addr_t 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, buffer);
+        set_dma_count(channel, count);
+        enable_dma(channel);
+
+        release_dma_lock(flags);
+}
+EXPORT_SYMBOL(irda_setup_dma);
+#endif