*
* See Documentation/usb/usb-serial.txt for more information on using this
* driver
- *
- * (07/16/2001) gb
- * remove unused code in empeg_close() (thanks to Oliver Neukum for
- * pointing this out) and rewrote empeg_set_termios().
- *
- * (05/30/2001) gkh
- * switched from using spinlock to a semaphore, which fixes lots of
- * problems.
- *
- * (04/08/2001) gb
- * Identify version on module load.
- *
- * (01/22/2001) gb
- * Added write_room() and chars_in_buffer() support.
- *
- * (12/21/2000) gb
- * Moved termio stuff inside the port->active check.
- * Moved MOD_DEC_USE_COUNT to end of empeg_close().
- *
- * (12/03/2000) gb
- * Added tty->ldisc.set_termios(port, tty, NULL) to empeg_open().
- * This notifies the tty driver that the termios have changed.
- *
- * (11/13/2000) gb
- * Moved tty->low_latency = 1 from empeg_read_bulk_callback() to
- * empeg_open() (It only needs to be set once - Doh!)
- *
- * (11/11/2000) gb
- * Updated to work with id_table structure.
- *
- * (11/04/2000) gb
- * Forked this from visor.c, and hacked it up to work with an
- * Empeg ltd. empeg-car player. Constructive criticism welcomed.
- * I would like to say, 'Thank You' to Greg Kroah-Hartman for the
- * use of his code, and for his guidance, advice and patience. :)
- * A 'Thank You' is in order for John Ripley of Empeg ltd for his
- * advice, and patience too.
- *
*/
#include <linux/kernel.h>
/*
* Version Information
*/
-#define DRIVER_VERSION "v1.2"
+#define DRIVER_VERSION "v1.3"
#define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>, Gary Brubaker <xavyer@ix.netcom.com>"
#define DRIVER_DESC "USB Empeg Mark I/II Driver"
#define EMPEG_PRODUCT_ID 0x0001
/* function prototypes for an empeg-car player */
-static int empeg_open(struct tty_struct *tty, struct usb_serial_port *port);
-static void empeg_close(struct usb_serial_port *port);
-static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port,
- const unsigned char *buf,
- int count);
-static int empeg_write_room(struct tty_struct *tty);
-static int empeg_chars_in_buffer(struct tty_struct *tty);
-static void empeg_throttle(struct tty_struct *tty);
-static void empeg_unthrottle(struct tty_struct *tty);
static int empeg_startup(struct usb_serial *serial);
static void empeg_init_termios(struct tty_struct *tty);
-static void empeg_write_bulk_callback(struct urb *urb);
-static void empeg_read_bulk_callback(struct urb *urb);
static const struct usb_device_id id_table[] = {
{ USB_DEVICE(EMPEG_VENDOR_ID, EMPEG_PRODUCT_ID) },
.probe = usb_serial_probe,
.disconnect = usb_serial_disconnect,
.id_table = id_table,
- .no_dynamic_id = 1,
+ .no_dynamic_id = 1,
};
static struct usb_serial_driver empeg_device = {
.name = "empeg",
},
.id_table = id_table,
- .usb_driver = &empeg_driver,
+ .usb_driver = &empeg_driver,
.num_ports = 1,
- .open = empeg_open,
- .close = empeg_close,
- .throttle = empeg_throttle,
- .unthrottle = empeg_unthrottle,
+ .bulk_out_size = 256,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
.attach = empeg_startup,
.init_termios = empeg_init_termios,
- .write = empeg_write,
- .write_room = empeg_write_room,
- .chars_in_buffer = empeg_chars_in_buffer,
- .write_bulk_callback = empeg_write_bulk_callback,
- .read_bulk_callback = empeg_read_bulk_callback,
};
-#define NUM_URBS 16
-#define URB_TRANSFER_BUFFER_SIZE 4096
-
-static struct urb *write_urb_pool[NUM_URBS];
-static spinlock_t write_urb_pool_lock;
-static int bytes_in;
-static int bytes_out;
-
-/******************************************************************************
- * Empeg specific driver functions
- ******************************************************************************/
-static int empeg_open(struct tty_struct *tty,struct usb_serial_port *port)
-{
- struct usb_serial *serial = port->serial;
- int result = 0;
-
- dbg("%s - port %d", __func__, port->number);
-
- bytes_in = 0;
- bytes_out = 0;
-
- /* 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,
- empeg_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);
-
- return result;
-}
-
-
-static void empeg_close(struct usb_serial_port *port)
-{
- dbg("%s - port %d", __func__, port->number);
-
- /* shutdown our bulk read */
- usb_kill_urb(port->read_urb);
- /* Uncomment the following line if you want to see some statistics in your syslog */
- /* dev_info (&port->dev, "Bytes In = %d Bytes Out = %d\n", bytes_in, bytes_out); */
-}
-
-
-static int empeg_write(struct tty_struct *tty, struct usb_serial_port *port,
- const unsigned char *buf, int count)
-{
- struct usb_serial *serial = port->serial;
- struct urb *urb;
- const unsigned char *current_position = buf;
- unsigned long flags;
- int status;
- int i;
- int bytes_sent = 0;
- int transfer_size;
-
- dbg("%s - port %d", __func__, port->number);
-
- while (count > 0) {
- /* try to find a free urb in our list of them */
- urb = NULL;
-
- spin_lock_irqsave(&write_urb_pool_lock, flags);
-
- for (i = 0; i < NUM_URBS; ++i) {
- if (write_urb_pool[i]->status != -EINPROGRESS) {
- urb = write_urb_pool[i];
- break;
- }
- }
-
- spin_unlock_irqrestore(&write_urb_pool_lock, flags);
-
- if (urb == NULL) {
- dbg("%s - no more free urbs", __func__);
- goto exit;
- }
-
- if (urb->transfer_buffer == NULL) {
- urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC);
- if (urb->transfer_buffer == NULL) {
- dev_err(&port->dev,
- "%s no more kernel memory...\n",
- __func__);
- goto exit;
- }
- }
-
- transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
-
- memcpy(urb->transfer_buffer, current_position, transfer_size);
-
- usb_serial_debug_data(debug, &port->dev, __func__, transfer_size, urb->transfer_buffer);
-
- /* build up our urb */
- usb_fill_bulk_urb(
- urb,
- serial->dev,
- usb_sndbulkpipe(serial->dev,
- port->bulk_out_endpointAddress),
- urb->transfer_buffer,
- transfer_size,
- empeg_write_bulk_callback,
- port);
-
- /* send it down the pipe */
- status = usb_submit_urb(urb, GFP_ATOMIC);
- if (status) {
- dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed with status = %d\n", __func__, status);
- bytes_sent = status;
- break;
- }
-
- current_position += transfer_size;
- bytes_sent += transfer_size;
- count -= transfer_size;
- bytes_out += transfer_size;
-
- }
-exit:
- return bytes_sent;
-}
-
-
-static int empeg_write_room(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- unsigned long flags;
- int i;
- int room = 0;
-
- dbg("%s - port %d", __func__, port->number);
-
- spin_lock_irqsave(&write_urb_pool_lock, flags);
- /* tally up the number of bytes available */
- for (i = 0; i < NUM_URBS; ++i) {
- if (write_urb_pool[i]->status != -EINPROGRESS)
- room += URB_TRANSFER_BUFFER_SIZE;
- }
- spin_unlock_irqrestore(&write_urb_pool_lock, flags);
- dbg("%s - returns %d", __func__, room);
- return room;
-
-}
-
-
-static int empeg_chars_in_buffer(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- unsigned long flags;
- int i;
- int chars = 0;
-
- dbg("%s - port %d", __func__, port->number);
-
- spin_lock_irqsave(&write_urb_pool_lock, flags);
-
- /* tally up the number of bytes waiting */
- for (i = 0; i < NUM_URBS; ++i) {
- if (write_urb_pool[i]->status == -EINPROGRESS)
- chars += URB_TRANSFER_BUFFER_SIZE;
- }
-
- spin_unlock_irqrestore(&write_urb_pool_lock, flags);
- dbg("%s - returns %d", __func__, chars);
- return chars;
-}
-
-
-static void empeg_write_bulk_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- int status = urb->status;
-
- dbg("%s - port %d", __func__, port->number);
-
- if (status) {
- dbg("%s - nonzero write bulk status received: %d",
- __func__, status);
- return;
- }
-
- usb_serial_port_softint(port);
-}
-
-
-static void empeg_read_bulk_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct tty_struct *tty;
- unsigned char *data = urb->transfer_buffer;
- int result;
- int status = urb->status;
-
- dbg("%s - port %d", __func__, port->number);
-
- if (status) {
- dbg("%s - nonzero read bulk status received: %d",
- __func__, status);
- return;
- }
-
- usb_serial_debug_data(debug, &port->dev, __func__,
- urb->actual_length, data);
- tty = tty_port_tty_get(&port->port);
-
- if (urb->actual_length) {
- tty_insert_flip_string(tty, data, urb->actual_length);
- tty_flip_buffer_push(tty);
- bytes_in += urb->actual_length;
- }
- tty_kref_put(tty);
-
- /* Continue trying to always read */
- usb_fill_bulk_urb(
- port->read_urb,
- port->serial->dev,
- usb_rcvbulkpipe(port->serial->dev,
- port->bulk_in_endpointAddress),
- port->read_urb->transfer_buffer,
- port->read_urb->transfer_buffer_length,
- empeg_read_bulk_callback,
- port);
-
- result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
-
- if (result)
- dev_err(&urb->dev->dev,
- "%s - failed resubmitting read urb, error %d\n",
- __func__, result);
-
- return;
-
-}
-
-
-static void empeg_throttle(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- dbg("%s - port %d", __func__, port->number);
- usb_kill_urb(port->read_urb);
-}
-
-
-static void empeg_unthrottle(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- int result;
- dbg("%s - port %d", __func__, port->number);
-
- port->read_urb->dev = port->serial->dev;
- 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);
-}
-
-
-static int empeg_startup(struct usb_serial *serial)
+static int empeg_startup(struct usb_serial *serial)
{
int r;
/* continue on with initialization */
return r;
-
}
-
static void empeg_init_termios(struct tty_struct *tty)
{
struct ktermios *termios = tty->termios;
tty_encode_baud_rate(tty, 115200, 115200);
}
-
static int __init empeg_init(void)
{
- struct urb *urb;
- int i, retval;
-
- /* create our write urb pool and transfer buffers */
- spin_lock_init(&write_urb_pool_lock);
- for (i = 0; i < NUM_URBS; ++i) {
- urb = usb_alloc_urb(0, GFP_KERNEL);
- write_urb_pool[i] = urb;
- if (urb == NULL) {
- printk(KERN_ERR "empeg: No more urbs???\n");
- continue;
- }
-
- urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
- GFP_KERNEL);
- if (!urb->transfer_buffer) {
- printk(KERN_ERR "empeg: %s - out of memory for urb "
- "buffers.", __func__);
- continue;
- }
- }
+ int retval;
retval = usb_serial_register(&empeg_device);
if (retval)
- goto failed_usb_serial_register;
+ return retval;
retval = usb_register(&empeg_driver);
- if (retval)
- goto failed_usb_register;
-
+ if (retval) {
+ usb_serial_deregister(&empeg_device);
+ return retval;
+ }
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
DRIVER_DESC "\n");
return 0;
-failed_usb_register:
- usb_serial_deregister(&empeg_device);
-failed_usb_serial_register:
- for (i = 0; i < NUM_URBS; ++i) {
- if (write_urb_pool[i]) {
- kfree(write_urb_pool[i]->transfer_buffer);
- usb_free_urb(write_urb_pool[i]);
- }
- }
- return retval;
}
-
static void __exit empeg_exit(void)
{
- int i;
- unsigned long flags;
-
usb_deregister(&empeg_driver);
usb_serial_deregister(&empeg_device);
-
- spin_lock_irqsave(&write_urb_pool_lock, flags);
-
- for (i = 0; i < NUM_URBS; ++i) {
- if (write_urb_pool[i]) {
- /* FIXME - uncomment the following usb_kill_urb call
- * when the host controllers get fixed to set urb->dev
- * = NULL after the urb is finished. Otherwise this
- * call oopses. */
- /* usb_kill_urb(write_urb_pool[i]); */
- kfree(write_urb_pool[i]->transfer_buffer);
- usb_free_urb(write_urb_pool[i]);
- }
- }
- spin_unlock_irqrestore(&write_urb_pool_lock, flags);
}
projects / platform / kernel / linux-stable.git / commitdiff