static void ipaq_close(struct usb_serial_port *port, struct file *filp)
{
struct ipaq_private *priv = usb_get_serial_port_data(port);
dbg("%s - port %d", __FUNCTION__, port->number);
/*
* shut down bulk read and write
*/
usb_unlink_urb(port->write_urb);
usb_unlink_urb(port->read_urb);
ipaq_destroy_lists(port);
kfree(priv);
usb_set_serial_port_data(port, NULL);
/* Uncomment the following line if you want to see some statistics in your syslog */
/* info ("Bytes In = %d Bytes Out = %d", bytes_in, bytes_out); */
}
static int ipaq_open(struct usb_serial_port *port, struct file *filp)
{
struct usb_serial *serial = port->serial;
struct ipaq_private *priv;
struct ipaq_packet *pkt;
int i, result = 0;
int retries = KP_RETRIES;
dbg("%s - port %d", __FUNCTION__, port->number);
bytes_in = 0;
bytes_out = 0;
priv = (struct ipaq_private *)kmalloc(sizeof(struct ipaq_private), GFP_KERNEL);
if (priv == NULL) {
err("%s - Out of memory", __FUNCTION__);
return -ENOMEM;
}
usb_set_serial_port_data(port, priv);
priv->active = 0;
priv->queue_len = 0;
INIT_LIST_HEAD(&priv->queue);
INIT_LIST_HEAD(&priv->freelist);
for (i = 0; i < URBDATA_QUEUE_MAX / PACKET_SIZE; i++) {
pkt = kmalloc(sizeof(struct ipaq_packet), GFP_KERNEL);
if (pkt == NULL) {
goto enomem;
}
pkt->data = kmalloc(PACKET_SIZE, GFP_KERNEL);
if (pkt->data == NULL) {
kfree(pkt);
goto enomem;
}
pkt->len = 0;
pkt->written = 0;
INIT_LIST_HEAD(&pkt->list);
list_add(&pkt->list, &priv->freelist);
priv->free_len += PACKET_SIZE;
}
/*
* Force low latency on. This will immediately push data to the line
* discipline instead of queueing.
*/
port->tty->low_latency = 1;
port->tty->raw = 1;
port->tty->real_raw = 1;
/*
* Lose the small buffers usbserial provides. Make larger ones.
*/
kfree(port->bulk_in_buffer);
kfree(port->bulk_out_buffer);
port->bulk_in_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
if (port->bulk_in_buffer == NULL) {
goto enomem;
}
port->bulk_out_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
if (port->bulk_out_buffer == NULL) {
kfree(port->bulk_in_buffer);
goto enomem;
}
port->read_urb->transfer_buffer = port->bulk_in_buffer;
port->write_urb->transfer_buffer = port->bulk_out_buffer;
port->read_urb->transfer_buffer_length = URBDATA_SIZE;
port->bulk_out_size = port->write_urb->transfer_buffer_length = URBDATA_SIZE;
/* Start reading from the device */
usb_fill_bulk_urb(port->read_urb, serial->dev,
usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer, port->read_urb->transfer_buffer_length,
ipaq_read_bulk_callback, port);
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (result) {
err("%s - failed submitting read urb, error %d", __FUNCTION__, result);
goto error;
}
/*
* Send out control message observed in win98 sniffs. Not sure what
* it does, but from empirical observations, it seems that the device
* will start the chat sequence once one of these messages gets
* through. Since this has a reasonably high failure rate, we retry
* several times.
*/
while (retries--) {
result = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0), 0x22, 0x21,
0x1, 0, NULL, 0, HZ / 10 + 1);
if (result == 0) {
return 0;
}
}
err("%s - failed doing control urb, error %d", __FUNCTION__, result);
goto error;
enomem:
result = -ENOMEM;
err("%s - Out of memory", __FUNCTION__);
error:
ipaq_destroy_lists(port);
kfree(priv);
return result;
}
static int ipaq_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
struct usb_serial *serial = port->serial;
struct ipaq_private *priv;
struct ipaq_packet *pkt;
int i, result = 0;
int retries = connect_retries;
dbg("%s - port %d", __func__, port->number);
bytes_in = 0;
bytes_out = 0;
priv = kmalloc(sizeof(struct ipaq_private), GFP_KERNEL);
if (priv == NULL) {
dev_err(&port->dev, "%s - Out of memory\n", __func__);
return -ENOMEM;
}
usb_set_serial_port_data(port, priv);
priv->active = 0;
priv->queue_len = 0;
priv->free_len = 0;
INIT_LIST_HEAD(&priv->queue);
INIT_LIST_HEAD(&priv->freelist);
for (i = 0; i < URBDATA_QUEUE_MAX / PACKET_SIZE; i++) {
pkt = kmalloc(sizeof(struct ipaq_packet), GFP_KERNEL);
if (pkt == NULL)
goto enomem;
pkt->data = kmalloc(PACKET_SIZE, GFP_KERNEL);
if (pkt->data == NULL) {
kfree(pkt);
goto enomem;
}
pkt->len = 0;
pkt->written = 0;
INIT_LIST_HEAD(&pkt->list);
list_add(&pkt->list, &priv->freelist);
priv->free_len += PACKET_SIZE;
}
if (tty) {
/* FIXME: These two are bogus */
tty->raw = 1;
tty->real_raw = 1;
}
/*
* Lose the small buffers usbserial provides. Make larger ones.
*/
kfree(port->bulk_in_buffer);
kfree(port->bulk_out_buffer);
/* make sure the generic serial code knows */
port->bulk_out_buffer = NULL;
port->bulk_in_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
if (port->bulk_in_buffer == NULL)
goto enomem;
port->bulk_out_buffer = kmalloc(URBDATA_SIZE, GFP_KERNEL);
if (port->bulk_out_buffer == NULL) {
/* the buffer is useless, free it */
kfree(port->bulk_in_buffer);
port->bulk_in_buffer = NULL;
goto enomem;
}
port->read_urb->transfer_buffer = port->bulk_in_buffer;
port->write_urb->transfer_buffer = port->bulk_out_buffer;
port->read_urb->transfer_buffer_length = URBDATA_SIZE;
port->bulk_out_size = port->write_urb->transfer_buffer_length
= URBDATA_SIZE;
msleep(1000*initial_wait);
/*
* Send out control message observed in win98 sniffs. Not sure what
* it does, but from empirical observations, it seems that the device
* will start the chat sequence once one of these messages gets
* through. Since this has a reasonably high failure rate, we retry
* several times.
*/
while (retries--) {
result = usb_control_msg(serial->dev,
usb_sndctrlpipe(serial->dev, 0), 0x22, 0x21,
0x1, 0, NULL, 0, 100);
if (!result)
break;
msleep(1000);
}
if (!retries && result) {
dev_err(&port->dev, "%s - failed doing control urb, error %d\n", __func__, result);
goto error;
}
/* Start reading from the device */
usb_fill_bulk_urb(port->read_urb, serial->dev,
usb_rcvbulkpipe(serial->dev, port->bulk_in_endpointAddress),
port->read_urb->transfer_buffer,
port->read_urb->transfer_buffer_length,
ipaq_read_bulk_callback, port);
result = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (result) {
dev_err(&port->dev,
"%s - failed submitting read urb, error %d\n",
__func__, result);
goto error;
}
return 0;
enomem:
result = -ENOMEM;
dev_err(&port->dev, "%s - Out of memory\n", __func__);
error:
ipaq_destroy_lists(port);
kfree(priv);
return result;
}