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path: root/drivers/usb/serial/visor.c
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Diffstat (limited to 'drivers/usb/serial/visor.c')
-rw-r--r--drivers/usb/serial/visor.c342
1 files changed, 13 insertions, 329 deletions
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index fb7fc4068fb6..17fd8822d07f 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -38,17 +38,9 @@
/* function prototypes for a handspring visor */
static int visor_open(struct tty_struct *tty, struct usb_serial_port *port);
static void visor_close(struct usb_serial_port *port);
-static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
- const unsigned char *buf, int count);
-static int visor_write_room(struct tty_struct *tty);
-static void visor_throttle(struct tty_struct *tty);
-static void visor_unthrottle(struct tty_struct *tty);
static int visor_probe(struct usb_serial *serial,
const struct usb_device_id *id);
static int visor_calc_num_ports(struct usb_serial *serial);
-static void visor_release(struct usb_serial *serial);
-static void visor_write_bulk_callback(struct urb *urb);
-static void visor_read_bulk_callback(struct urb *urb);
static void visor_read_int_callback(struct urb *urb);
static int clie_3_5_startup(struct usb_serial *serial);
static int treo_attach(struct usb_serial *serial);
@@ -196,16 +188,11 @@ static struct usb_serial_driver handspring_device = {
.num_ports = 2,
.open = visor_open,
.close = visor_close,
- .throttle = visor_throttle,
- .unthrottle = visor_unthrottle,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
.attach = treo_attach,
.probe = visor_probe,
.calc_num_ports = visor_calc_num_ports,
- .release = visor_release,
- .write = visor_write,
- .write_room = visor_write_room,
- .write_bulk_callback = visor_write_bulk_callback,
- .read_bulk_callback = visor_read_bulk_callback,
.read_int_callback = visor_read_int_callback,
};
@@ -221,16 +208,11 @@ static struct usb_serial_driver clie_5_device = {
.num_ports = 2,
.open = visor_open,
.close = visor_close,
- .throttle = visor_throttle,
- .unthrottle = visor_unthrottle,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
.attach = clie_5_attach,
.probe = visor_probe,
.calc_num_ports = visor_calc_num_ports,
- .release = visor_release,
- .write = visor_write,
- .write_room = visor_write_room,
- .write_bulk_callback = visor_write_bulk_callback,
- .read_bulk_callback = visor_read_bulk_callback,
.read_int_callback = visor_read_int_callback,
};
@@ -246,38 +228,16 @@ static struct usb_serial_driver clie_3_5_device = {
.num_ports = 1,
.open = visor_open,
.close = visor_close,
- .throttle = visor_throttle,
- .unthrottle = visor_unthrottle,
+ .throttle = usb_serial_generic_throttle,
+ .unthrottle = usb_serial_generic_unthrottle,
.attach = clie_3_5_startup,
- .release = visor_release,
- .write = visor_write,
- .write_room = visor_write_room,
- .write_bulk_callback = visor_write_bulk_callback,
- .read_bulk_callback = visor_read_bulk_callback,
};
-struct visor_private {
- spinlock_t lock;
- int bytes_in;
- int bytes_out;
- int outstanding_urbs;
- unsigned char throttled;
- unsigned char actually_throttled;
-};
-
-/* number of outstanding urbs to prevent userspace DoS from happening */
-#define URB_UPPER_LIMIT 42
-
-static int stats;
-
/******************************************************************************
* Handspring Visor specific driver functions
******************************************************************************/
static int visor_open(struct tty_struct *tty, struct usb_serial_port *port)
{
- struct usb_serial *serial = port->serial;
- struct visor_private *priv = usb_get_serial_port_data(port);
- unsigned long flags;
int result = 0;
dbg("%s - port %d", __func__, port->number);
@@ -288,26 +248,10 @@ static int visor_open(struct tty_struct *tty, struct usb_serial_port *port)
return -ENODEV;
}
- spin_lock_irqsave(&priv->lock, flags);
- priv->bytes_in = 0;
- priv->bytes_out = 0;
- priv->throttled = 0;
- spin_unlock_irqrestore(&priv->lock, flags);
-
/* 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,
- visor_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);
+ result = usb_serial_generic_open(tty, port);
+ if (result)
goto exit;
- }
if (port->interrupt_in_urb) {
dbg("%s - adding interrupt input for treo", __func__);
@@ -324,13 +268,12 @@ exit:
static void visor_close(struct usb_serial_port *port)
{
- struct visor_private *priv = usb_get_serial_port_data(port);
unsigned char *transfer_buffer;
dbg("%s - port %d", __func__, port->number);
/* shutdown our urbs */
- usb_kill_urb(port->read_urb);
+ usb_serial_generic_close(port);
usb_kill_urb(port->interrupt_in_urb);
mutex_lock(&port->serial->disc_mutex);
@@ -347,192 +290,6 @@ static void visor_close(struct usb_serial_port *port)
}
}
mutex_unlock(&port->serial->disc_mutex);
-
- if (stats)
- dev_info(&port->dev, "Bytes In = %d Bytes Out = %d\n",
- priv->bytes_in, priv->bytes_out);
-}
-
-
-static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
- const unsigned char *buf, int count)
-{
- struct visor_private *priv = usb_get_serial_port_data(port);
- struct usb_serial *serial = port->serial;
- struct urb *urb;
- unsigned char *buffer;
- unsigned long flags;
- int status;
-
- dbg("%s - port %d", __func__, port->number);
-
- spin_lock_irqsave(&priv->lock, flags);
- if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
- spin_unlock_irqrestore(&priv->lock, flags);
- dbg("%s - write limit hit", __func__);
- return 0;
- }
- priv->outstanding_urbs++;
- spin_unlock_irqrestore(&priv->lock, flags);
-
- buffer = kmalloc(count, GFP_ATOMIC);
- if (!buffer) {
- dev_err(&port->dev, "out of memory\n");
- count = -ENOMEM;
- goto error_no_buffer;
- }
-
- urb = usb_alloc_urb(0, GFP_ATOMIC);
- if (!urb) {
- dev_err(&port->dev, "no more free urbs\n");
- count = -ENOMEM;
- goto error_no_urb;
- }
-
- memcpy(buffer, buf, count);
-
- usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
-
- usb_fill_bulk_urb(urb, serial->dev,
- usb_sndbulkpipe(serial->dev,
- port->bulk_out_endpointAddress),
- buffer, count,
- visor_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);
- count = status;
- goto error;
- } else {
- spin_lock_irqsave(&priv->lock, flags);
- priv->bytes_out += count;
- spin_unlock_irqrestore(&priv->lock, flags);
- }
-
- /* we are done with this urb, so let the host driver
- * really free it when it is finished with it */
- usb_free_urb(urb);
-
- return count;
-error:
- usb_free_urb(urb);
-error_no_urb:
- kfree(buffer);
-error_no_buffer:
- spin_lock_irqsave(&priv->lock, flags);
- --priv->outstanding_urbs;
- spin_unlock_irqrestore(&priv->lock, flags);
- return count;
-}
-
-
-static int visor_write_room(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct visor_private *priv = usb_get_serial_port_data(port);
- unsigned long flags;
-
- dbg("%s - port %d", __func__, port->number);
-
- /*
- * We really can take anything the user throws at us
- * but let's pick a nice big number to tell the tty
- * layer that we have lots of free space, unless we don't.
- */
-
- spin_lock_irqsave(&priv->lock, flags);
- if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
- spin_unlock_irqrestore(&priv->lock, flags);
- dbg("%s - write limit hit", __func__);
- return 0;
- }
- spin_unlock_irqrestore(&priv->lock, flags);
-
- return 2048;
-}
-
-
-static void visor_write_bulk_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct visor_private *priv = usb_get_serial_port_data(port);
- int status = urb->status;
- unsigned long flags;
-
- /* free up the transfer buffer, as usb_free_urb() does not do this */
- kfree(urb->transfer_buffer);
-
- dbg("%s - port %d", __func__, port->number);
-
- if (status)
- dbg("%s - nonzero write bulk status received: %d",
- __func__, status);
-
- spin_lock_irqsave(&priv->lock, flags);
- --priv->outstanding_urbs;
- spin_unlock_irqrestore(&priv->lock, flags);
-
- usb_serial_port_softint(port);
-}
-
-
-static void visor_read_bulk_callback(struct urb *urb)
-{
- struct usb_serial_port *port = urb->context;
- struct visor_private *priv = usb_get_serial_port_data(port);
- unsigned char *data = urb->transfer_buffer;
- int status = urb->status;
- struct tty_struct *tty;
- int result;
- int available_room = 0;
-
- 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);
-
- if (urb->actual_length) {
- tty = tty_port_tty_get(&port->port);
- if (tty) {
- tty_insert_flip_string(tty, data,
- urb->actual_length);
- tty_flip_buffer_push(tty);
- tty_kref_put(tty);
- }
- spin_lock(&priv->lock);
- if (tty)
- priv->bytes_in += available_room;
-
- } else {
- spin_lock(&priv->lock);
- }
-
- /* Continue trying to always read if we should */
- if (!priv->throttled) {
- 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,
- visor_read_bulk_callback, port);
- result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
- if (result)
- dev_err(&port->dev,
- "%s - failed resubmitting read urb, error %d\n",
- __func__, result);
- } else
- priv->actually_throttled = 1;
- spin_unlock(&priv->lock);
}
static void visor_read_int_callback(struct urb *urb)
@@ -576,41 +333,6 @@ exit:
__func__, result);
}
-static void visor_throttle(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct visor_private *priv = usb_get_serial_port_data(port);
-
- dbg("%s - port %d", __func__, port->number);
- spin_lock_irq(&priv->lock);
- priv->throttled = 1;
- spin_unlock_irq(&priv->lock);
-}
-
-
-static void visor_unthrottle(struct tty_struct *tty)
-{
- struct usb_serial_port *port = tty->driver_data;
- struct visor_private *priv = usb_get_serial_port_data(port);
- int result, was_throttled;
-
- dbg("%s - port %d", __func__, port->number);
- spin_lock_irq(&priv->lock);
- priv->throttled = 0;
- was_throttled = priv->actually_throttled;
- priv->actually_throttled = 0;
- spin_unlock_irq(&priv->lock);
-
- if (was_throttled) {
- 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 palm_os_3_probe(struct usb_serial *serial,
const struct usb_device_id *id)
{
@@ -778,28 +500,6 @@ static int visor_calc_num_ports(struct usb_serial *serial)
return num_ports;
}
-static int generic_startup(struct usb_serial *serial)
-{
- struct usb_serial_port **ports = serial->port;
- struct visor_private *priv;
- int i;
-
- for (i = 0; i < serial->num_ports; ++i) {
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv) {
- while (i-- != 0) {
- priv = usb_get_serial_port_data(ports[i]);
- usb_set_serial_port_data(ports[i], NULL);
- kfree(priv);
- }
- return -ENOMEM;
- }
- spin_lock_init(&priv->lock);
- usb_set_serial_port_data(ports[i], priv);
- }
- return 0;
-}
-
static int clie_3_5_startup(struct usb_serial *serial)
{
struct device *dev = &serial->dev->dev;
@@ -850,7 +550,7 @@ static int clie_3_5_startup(struct usb_serial *serial)
goto out;
}
- result = generic_startup(serial);
+ result = 0;
out:
kfree(data);
@@ -868,7 +568,7 @@ static int treo_attach(struct usb_serial *serial)
(le16_to_cpu(serial->dev->descriptor.idVendor)
== KYOCERA_VENDOR_ID)) ||
(serial->num_interrupt_in == 0))
- goto generic_startup;
+ return 0;
dbg("%s", __func__);
@@ -898,8 +598,7 @@ static int treo_attach(struct usb_serial *serial)
COPY_PORT(serial->port[1], swap_port);
kfree(swap_port);
-generic_startup:
- return generic_startup(serial);
+ return 0;
}
static int clie_5_attach(struct usb_serial *serial)
@@ -922,20 +621,7 @@ static int clie_5_attach(struct usb_serial *serial)
serial->port[0]->bulk_out_endpointAddress =
serial->port[1]->bulk_out_endpointAddress;
- return generic_startup(serial);
-}
-
-static void visor_release(struct usb_serial *serial)
-{
- struct visor_private *priv;
- int i;
-
- dbg("%s", __func__);
-
- for (i = 0; i < serial->num_ports; i++) {
- priv = usb_get_serial_port_data(serial->port[i]);
- kfree(priv);
- }
+ return 0;
}
static int __init visor_init(void)
@@ -1019,8 +705,6 @@ MODULE_LICENSE("GPL");
module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
-module_param(stats, bool, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(stats, "Enables statistics or not");
module_param(vendor, ushort, 0);
MODULE_PARM_DESC(vendor, "User specified vendor ID");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.