/*
* Function irda_usb_find_class_desc(dev, ifnum)
*
* Returns instance of IrDA class descriptor, or NULL if not found
*
* The class descriptor is some extra info that IrDA USB devices will
* offer to us, describing their IrDA characteristics. We will use that in
* irda_usb_init_qos()
*
* Based on the same function in drivers/net/irda/irda-usb.c
*/
static struct irda_class_desc *irda_usb_find_class_desc(struct usb_device *dev, unsigned int ifnum)
{
struct irda_class_desc *desc;
int ret;
desc = kmalloc(sizeof (struct irda_class_desc), GFP_KERNEL);
if (desc == NULL)
return NULL;
memset(desc, 0, sizeof(struct irda_class_desc));
ret = usb_control_msg(dev, usb_rcvctrlpipe(dev,0),
IU_REQ_GET_CLASS_DESC,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, ifnum, desc, sizeof(*desc), MSECS_TO_JIFFIES(500));
dbg("%s - ret=%d", __FUNCTION__, ret);
if (ret < sizeof(*desc)) {
dbg("%s - class descriptor read %s (%d)",
__FUNCTION__,
(ret<0) ? "failed" : "too short",
ret);
goto error;
}
if (desc->bDescriptorType != USB_DT_IRDA) {
dbg("%s - bad class descriptor type", __FUNCTION__);
goto error;
}
irda_usb_dump_class_desc(desc);
return desc;
error:
kfree(desc);
return NULL;
}
static int wait_for_a_slot(struct slot_args *slargs, int *buffer_index)
{
int ret = -1, i = 0;
DECLARE_WAITQUEUE(my_wait, current);
add_wait_queue_exclusive(slargs->slot_wq, &my_wait);
while(1)
{
set_current_state(TASK_INTERRUPTIBLE);
/* check for available desc */
spin_lock(slargs->slot_lock);
for(i = 0; i < slargs->slot_count; i++)
{
if (slargs->slot_array[i] == 0)
{
slargs->slot_array[i] = 1;
*buffer_index = i;
ret = 0;
break;
}
}
spin_unlock(slargs->slot_lock);
/* if we acquired a buffer, then break out of while */
if (ret == 0)
{
break;
}
if (!signal_pending(current))
{
int timeout = MSECS_TO_JIFFIES(1000 * slot_timeout_secs);
gossip_debug(GOSSIP_BUFMAP_DEBUG,
"[BUFMAP]: waiting %d seconds for a slot\n",
slot_timeout_secs);
if (!schedule_timeout(timeout))
{
gossip_debug(GOSSIP_BUFMAP_DEBUG, "*** wait_for_a_slot timed out\n");
ret = -ETIMEDOUT;
break;
}
gossip_debug(GOSSIP_BUFMAP_DEBUG,
"[BUFMAP]: acquired slot\n");
continue;
}
gossip_debug(GOSSIP_BUFMAP_DEBUG, "pvfs2: wait_for_a_slot() interrupted.\n");
ret = -EINTR;
break;
}
set_current_state(TASK_RUNNING);
remove_wait_queue(slargs->slot_wq, &my_wait);
return ret;
}
/*
* Function girbil_reset (driver)
*
* This function resets the girbil dongle.
*
* Algorithm:
* 0. set RTS, and wait at least 5 ms
* 1. clear RTS
*/
static int girbil_reset(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u8 control = GIRBIL_TXEN | GIRBIL_RXEN;
int ret = 0;
self->reset_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
/* Reset dongle */
self->set_dtr_rts(self->dev, TRUE, FALSE);
irda_task_next_state(task, IRDA_TASK_WAIT1);
/* Sleep at least 5 ms */
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT1:
/* Set DTR and clear RTS to enter command mode */
self->set_dtr_rts(self->dev, FALSE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT2);
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT2:
/* Write control byte */
self->write(self->dev, &control, 1);
irda_task_next_state(task, IRDA_TASK_WAIT3);
ret = MSECS_TO_JIFFIES(20);
break;
case IRDA_TASK_WAIT3:
/* Go back to normal mode */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
break;
default:
ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
ret = -1;
break;
}
return ret;
}
static int mcp2120_reset(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
int ret = 0;
self->reset_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
//printk("mcp2120_reset irda_task_init\n");
/* Reset dongle by setting RTS*/
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_WAIT1);
ret = MSECS_TO_JIFFIES(50);
break;
case IRDA_TASK_WAIT1:
//printk("mcp2120_reset irda_task_wait1\n");
/* clear RTS and wait for at least 30 ms. */
self->set_dtr_rts(self->dev, FALSE, FALSE);
irda_task_next_state(task, IRDA_TASK_WAIT2);
ret = MSECS_TO_JIFFIES(50);
break;
case IRDA_TASK_WAIT2:
//printk("mcp2120_reset irda_task_wait2\n");
/* Go back to normal mode */
self->set_dtr_rts(self->dev, FALSE, FALSE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
break;
default:
ERROR("%s(), unknown state %d\n", __FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->reset_task = NULL;
ret = -1;
break;
}
return ret;
}
static int tekram_reset(struct sir_dev *dev)
{
IRDA_DEBUG(2, "%s()\n", __FUNCTION__);
/* Clear DTR, Set RTS */
sirdev_set_dtr_rts(dev, FALSE, TRUE);
/* Should sleep 1 ms */
set_current_state(TASK_UNINTERRUPTIBLE);
schedule_timeout(MSECS_TO_JIFFIES(1));
/* Set DTR, Set RTS */
sirdev_set_dtr_rts(dev, TRUE, TRUE);
/* Wait at least 50 us */
udelay(75);
dev->speed = 9600;
return 0;
}
/*
* Function mcp2120_change_speed (dev, speed)
*
* Set the speed for the MCP2120.
*
*/
static int mcp2120_change_speed(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u32 speed = (__u32) task->param;
__u8 control[2];
int ret = 0;
self->speed_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
/* Need to reset the dongle and go to 9600 bps before
programming */
//printk("Dmcp2120_change_speed irda_task_init\n");
if (irda_task_execute(self, mcp2120_reset, NULL, task,
(void *) speed))
{
/* Dongle need more time to reset */
irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
/* Give reset 1 sec to finish */
ret = MSECS_TO_JIFFIES(1000);
}
break;
case IRDA_TASK_CHILD_WAIT:
WARNING("%s(), resetting dongle timed out!\n", __FUNCTION__);
ret = -1;
break;
case IRDA_TASK_CHILD_DONE:
/* Set DTR to enter command mode */
self->set_dtr_rts(self->dev, TRUE, FALSE);
udelay(500);
switch (speed) {
case 9600:
default:
control[0] = MCP2120_9600;
//printk("mcp2120 9600\n");
break;
case 19200:
control[0] = MCP2120_19200;
//printk("mcp2120 19200\n");
break;
case 34800:
control[0] = MCP2120_38400;
//printk("mcp2120 38400\n");
break;
case 57600:
control[0] = MCP2120_57600;
//printk("mcp2120 57600\n");
break;
case 115200:
control[0] = MCP2120_115200;
//printk("mcp2120 115200\n");
break;
}
control[1] = MCP2120_COMMIT;
/* Write control bytes */
self->write(self->dev, control, 2);
irda_task_next_state(task, IRDA_TASK_WAIT);
ret = MSECS_TO_JIFFIES(100);
//printk("mcp2120_change_speed irda_child_done\n");
break;
case IRDA_TASK_WAIT:
/* Go back to normal mode */
self->set_dtr_rts(self->dev, FALSE, FALSE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
//printk("mcp2120_change_speed irda_task_wait\n");
break;
default:
ERROR("%s(), unknown state %d\n", __FUNCTION__, task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
ret = -1;
break;
}
return ret;
}
/*
* Function girbil_change_speed (dev, speed)
*
* Set the speed for the Girbil type dongle.
*
*/
static int girbil_change_speed(struct irda_task *task)
{
dongle_t *self = (dongle_t *) task->instance;
__u32 speed = (__u32) task->param;
__u8 control[2];
int ret = 0;
self->speed_task = task;
switch (task->state) {
case IRDA_TASK_INIT:
/* Need to reset the dongle and go to 9600 bps before
programming */
if (irda_task_execute(self, girbil_reset, NULL, task,
(void *) speed))
{
/* Dongle need more time to reset */
irda_task_next_state(task, IRDA_TASK_CHILD_WAIT);
/* Give reset 1 sec to finish */
ret = MSECS_TO_JIFFIES(1000);
}
break;
case IRDA_TASK_CHILD_WAIT:
WARNING(__FUNCTION__ "(), resetting dongle timed out!\n");
ret = -1;
break;
case IRDA_TASK_CHILD_DONE:
/* Set DTR and Clear RTS to enter command mode */
self->set_dtr_rts(self->dev, FALSE, TRUE);
switch (speed) {
case 9600:
default:
control[0] = GIRBIL_9600;
break;
case 19200:
control[0] = GIRBIL_19200;
break;
case 34800:
control[0] = GIRBIL_38400;
break;
case 57600:
control[0] = GIRBIL_57600;
break;
case 115200:
control[0] = GIRBIL_115200;
break;
}
control[1] = GIRBIL_LOAD;
/* Write control bytes */
self->write(self->dev, control, 2);
irda_task_next_state(task, IRDA_TASK_WAIT);
ret = MSECS_TO_JIFFIES(100);
break;
case IRDA_TASK_WAIT:
/* Go back to normal mode */
self->set_dtr_rts(self->dev, TRUE, TRUE);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
break;
default:
ERROR(__FUNCTION__ "(), unknown state %d\n", task->state);
irda_task_next_state(task, IRDA_TASK_DONE);
self->speed_task = NULL;
ret = -1;
break;
}
return ret;
}