/*
* USB Serial Converter driver
*
+ * Copyright (C) 2009 - 2013 Johan Hovold (jhovold@gmail.com)
* Copyright (C) 1999 - 2012 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2000 Peter Berger (pberger@brimson.com)
* Copyright (C) 2000 Al Borchers (borchers@steinerpoint.com)
*
* See Documentation/usb/usb-serial.txt for more information on using this
* driver
- *
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
drivers depend on it.
*/
-/* initially all NULL */
static struct usb_serial *serial_table[SERIAL_TTY_MINORS];
static DEFINE_MUTEX(table_lock);
static LIST_HEAD(usb_serial_driver_list);
if (serial->minor != SERIAL_TTY_NO_MINOR)
return_serial(serial);
- if (serial->attached)
+ if (serial->attached && serial->type->release)
serial->type->release(serial);
/* Now that nothing is using the ports, they can be freed */
return retval;
}
-static int serial_activate(struct tty_port *tport, struct tty_struct *tty)
+static int serial_port_activate(struct tty_port *tport, struct tty_struct *tty)
{
struct usb_serial_port *port =
container_of(tport, struct usb_serial_port, port);
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
+
return tty_port_open(&port->port, tty, filp);
}
/**
- * serial_down - shut down hardware
+ * serial_port_shutdown - shut down hardware
* @tport: tty port to shut down
*
- * Shut down a USB serial port unless it is the console. We never
- * shut down the console hardware as it will always be in use. Serialized
- * against activate by the tport mutex and kept to matching open/close pairs
+ * Shut down a USB serial port. Serialized against activate by the
+ * tport mutex and kept to matching open/close pairs
* of calls by the ASYNCB_INITIALIZED flag.
+ *
+ * Not called if tty is console.
*/
-static void serial_down(struct tty_port *tport)
+static void serial_port_shutdown(struct tty_port *tport)
{
struct usb_serial_port *port =
container_of(tport, struct usb_serial_port, port);
struct usb_serial_driver *drv = port->serial->type;
- /*
- * The console is magical. Do not hang up the console hardware
- * or there will be tears.
- */
- if (port->port.console)
- return;
+
if (drv->close)
drv->close(port);
}
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
+
tty_port_hangup(&port->port);
}
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
+
tty_port_close(&port->port, tty, filp);
}
struct usb_serial *serial;
struct module *owner;
+ dev_dbg(tty->dev, "%s\n", __func__);
+
/* The console is magical. Do not hang up the console hardware
* or there will be tears.
*/
if (port->port.console)
return;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
-
tty->driver_data = NULL;
serial = port->serial;
if (port->serial->dev->state == USB_STATE_NOTATTACHED)
goto exit;
- dev_dbg(tty->dev, "%s - port %d, %d byte(s)\n", __func__,
- port->number, count);
+ dev_dbg(tty->dev, "%s - %d byte(s)\n", __func__, count);
- /* pass on to the driver specific version of this function */
retval = port->serial->type->write(tty, port, buf, count);
if (retval < 0)
retval = usb_translate_errors(retval);
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
- /* pass on to the driver specific version of this function */
+ dev_dbg(tty->dev, "%s\n", __func__);
+
return port->serial->type->write_room(tty);
}
struct usb_serial *serial = port->serial;
int count = 0;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
mutex_lock(&serial->disc_mutex);
/* if the device was unplugged then any remaining characters
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
- /* pass on to the driver specific version of this function */
if (port->serial->type->throttle)
port->serial->type->throttle(tty);
}
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
- /* pass on to the driver specific version of this function */
if (port->serial->type->unthrottle)
port->serial->type->unthrottle(tty);
}
struct usb_serial_port *port = tty->driver_data;
int retval = -ENODEV;
- dev_dbg(tty->dev, "%s - port %d, cmd 0x%.4x\n", __func__,
- port->number, cmd);
+ dev_dbg(tty->dev, "%s - cmd 0x%.4x\n", __func__, cmd);
+
+ switch (cmd) {
+ case TIOCMIWAIT:
+ if (port->serial->type->tiocmiwait)
+ retval = port->serial->type->tiocmiwait(tty, arg);
+ break;
+ default:
+ if (port->serial->type->ioctl)
+ retval = port->serial->type->ioctl(tty, cmd, arg);
+ else
+ retval = -ENOIOCTLCMD;
+ }
- /* pass on to the driver specific version of this function
- if it is available */
- if (port->serial->type->ioctl) {
- retval = port->serial->type->ioctl(tty, cmd, arg);
- } else
- retval = -ENOIOCTLCMD;
return retval;
}
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
- /* pass on to the driver specific version of this function
- if it is available */
if (port->serial->type->set_termios)
port->serial->type->set_termios(tty, port, old);
else
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
- /* pass on to the driver specific version of this function
- if it is available */
if (port->serial->type->break_ctl)
port->serial->type->break_ctl(tty, break_state);
+
return 0;
}
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
if (port->serial->type->tiocmget)
return port->serial->type->tiocmget(tty);
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
if (port->serial->type->tiocmset)
return port->serial->type->tiocmset(tty, set, clear);
{
struct usb_serial_port *port = tty->driver_data;
- dev_dbg(tty->dev, "%s - port %d\n", __func__, port->number);
+ dev_dbg(tty->dev, "%s\n", __func__);
if (port->serial->type->get_icount)
return port->serial->type->get_icount(tty, icount);
tty_port_tty_wakeup(&port->port);
}
-static void kill_traffic(struct usb_serial_port *port)
+static void usb_serial_port_poison_urbs(struct usb_serial_port *port)
{
int i;
for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
- usb_kill_urb(port->read_urbs[i]);
+ usb_poison_urb(port->read_urbs[i]);
for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
- usb_kill_urb(port->write_urbs[i]);
- /*
- * This is tricky.
- * Some drivers submit the read_urb in the
- * handler for the write_urb or vice versa
- * this order determines the order in which
- * usb_kill_urb() must be used to reliably
- * kill the URBs. As it is unknown here,
- * both orders must be used in turn.
- * The call below is not redundant.
- */
- usb_kill_urb(port->read_urb);
- usb_kill_urb(port->interrupt_in_urb);
- usb_kill_urb(port->interrupt_out_urb);
+ usb_poison_urb(port->write_urbs[i]);
+
+ usb_poison_urb(port->interrupt_in_urb);
+ usb_poison_urb(port->interrupt_out_urb);
+}
+
+static void usb_serial_port_unpoison_urbs(struct usb_serial_port *port)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i)
+ usb_unpoison_urb(port->read_urbs[i]);
+ for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i)
+ usb_unpoison_urb(port->write_urbs[i]);
+
+ usb_unpoison_urb(port->interrupt_in_urb);
+ usb_unpoison_urb(port->interrupt_out_urb);
}
-static void port_release(struct device *dev)
+static void usb_serial_port_release(struct device *dev)
{
struct usb_serial_port *port = to_usb_serial_port(dev);
int i;
dev_dbg(dev, "%s\n", __func__);
- /*
- * Stop all the traffic before cancelling the work, so that
- * nobody will restart it by calling usb_serial_port_softint.
- */
- kill_traffic(port);
- cancel_work_sync(&port->work);
-
usb_free_urb(port->interrupt_in_urb);
usb_free_urb(port->interrupt_out_urb);
for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
struct usb_serial *serial;
serial = kzalloc(sizeof(*serial), GFP_KERNEL);
- if (!serial) {
- dev_err(&dev->dev, "%s - out of memory\n", __func__);
+ if (!serial)
return NULL;
- }
serial->dev = usb_get_dev(dev);
serial->type = driver;
serial->interface = usb_get_intf(interface);
return NULL;
}
-static int serial_carrier_raised(struct tty_port *port)
+static int serial_port_carrier_raised(struct tty_port *port)
{
struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
struct usb_serial_driver *drv = p->serial->type;
return 1;
}
-static void serial_dtr_rts(struct tty_port *port, int on)
+static void serial_port_dtr_rts(struct tty_port *port, int on)
{
struct usb_serial_port *p = container_of(port, struct usb_serial_port, port);
struct usb_serial *serial = p->serial;
}
static const struct tty_port_operations serial_port_ops = {
- .carrier_raised = serial_carrier_raised,
- .dtr_rts = serial_dtr_rts,
- .activate = serial_activate,
- .shutdown = serial_down,
+ .carrier_raised = serial_port_carrier_raised,
+ .dtr_rts = serial_port_dtr_rts,
+ .activate = serial_port_activate,
+ .shutdown = serial_port_shutdown,
};
static int usb_serial_probe(struct usb_interface *interface,
serial = create_serial(dev, interface, type);
if (!serial) {
module_put(type->driver.owner);
- dev_err(ddev, "%s - out of memory\n", __func__);
return -ENOMEM;
}
port->port.ops = &serial_port_ops;
port->serial = serial;
spin_lock_init(&port->lock);
- init_waitqueue_head(&port->delta_msr_wait);
/* Keep this for private driver use for the moment but
should probably go away */
INIT_WORK(&port->work, usb_serial_port_work);
port->dev.parent = &interface->dev;
port->dev.driver = NULL;
port->dev.bus = &usb_serial_bus_type;
- port->dev.release = &port_release;
+ port->dev.release = &usb_serial_port_release;
device_initialize(&port->dev);
}
for (j = 0; j < ARRAY_SIZE(port->read_urbs); ++j) {
set_bit(j, &port->read_urbs_free);
port->read_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->read_urbs[j]) {
- dev_err(ddev, "No free urbs available\n");
+ if (!port->read_urbs[j])
goto probe_error;
- }
port->bulk_in_buffers[j] = kmalloc(buffer_size,
GFP_KERNEL);
- if (!port->bulk_in_buffers[j]) {
- dev_err(ddev, "Couldn't allocate bulk_in_buffer\n");
+ if (!port->bulk_in_buffers[j])
goto probe_error;
- }
usb_fill_bulk_urb(port->read_urbs[j], dev,
usb_rcvbulkpipe(dev,
endpoint->bEndpointAddress),
for (j = 0; j < ARRAY_SIZE(port->write_urbs); ++j) {
set_bit(j, &port->write_urbs_free);
port->write_urbs[j] = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->write_urbs[j]) {
- dev_err(ddev, "No free urbs available\n");
+ if (!port->write_urbs[j])
goto probe_error;
- }
port->bulk_out_buffers[j] = kmalloc(buffer_size,
GFP_KERNEL);
- if (!port->bulk_out_buffers[j]) {
- dev_err(ddev, "Couldn't allocate bulk_out_buffer\n");
+ if (!port->bulk_out_buffers[j])
goto probe_error;
- }
usb_fill_bulk_urb(port->write_urbs[j], dev,
usb_sndbulkpipe(dev,
endpoint->bEndpointAddress),
endpoint = interrupt_in_endpoint[i];
port = serial->port[i];
port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->interrupt_in_urb) {
- dev_err(ddev, "No free urbs available\n");
+ if (!port->interrupt_in_urb)
goto probe_error;
- }
buffer_size = usb_endpoint_maxp(endpoint);
port->interrupt_in_endpointAddress =
endpoint->bEndpointAddress;
port->interrupt_in_buffer = kmalloc(buffer_size,
GFP_KERNEL);
- if (!port->interrupt_in_buffer) {
- dev_err(ddev, "Couldn't allocate interrupt_in_buffer\n");
+ if (!port->interrupt_in_buffer)
goto probe_error;
- }
usb_fill_int_urb(port->interrupt_in_urb, dev,
usb_rcvintpipe(dev,
endpoint->bEndpointAddress),
endpoint = interrupt_out_endpoint[i];
port = serial->port[i];
port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
- if (!port->interrupt_out_urb) {
- dev_err(ddev, "No free urbs available\n");
+ if (!port->interrupt_out_urb)
goto probe_error;
- }
buffer_size = usb_endpoint_maxp(endpoint);
port->interrupt_out_size = buffer_size;
port->interrupt_out_endpointAddress =
endpoint->bEndpointAddress;
port->interrupt_out_buffer = kmalloc(buffer_size,
GFP_KERNEL);
- if (!port->interrupt_out_buffer) {
- dev_err(ddev, "Couldn't allocate interrupt_out_buffer\n");
+ if (!port->interrupt_out_buffer)
goto probe_error;
- }
usb_fill_int_urb(port->interrupt_out_urb, dev,
usb_sndintpipe(dev,
endpoint->bEndpointAddress),
tty_vhangup(tty);
tty_kref_put(tty);
}
- kill_traffic(port);
+ usb_serial_port_poison_urbs(port);
+ wake_up_interruptible(&port->port.delta_msr_wait);
cancel_work_sync(&port->work);
if (device_is_registered(&port->dev))
device_del(&port->dev);
}
}
- serial->type->disconnect(serial);
+ if (serial->type->disconnect)
+ serial->type->disconnect(serial);
/* let the last holder of this object cause it to be cleaned up */
usb_serial_put(serial);
serial->suspending = 1;
+ /*
+ * serial->type->suspend() MUST return 0 in system sleep context,
+ * otherwise, the resume callback has to recover device from
+ * previous suspend failure.
+ */
if (serial->type->suspend) {
r = serial->type->suspend(serial, message);
if (r < 0) {
for (i = 0; i < serial->num_ports; ++i) {
port = serial->port[i];
if (port)
- kill_traffic(port);
+ usb_serial_port_poison_urbs(port);
}
err_out:
}
EXPORT_SYMBOL(usb_serial_suspend);
+static void usb_serial_unpoison_port_urbs(struct usb_serial *serial)
+{
+ struct usb_serial_port *port;
+ int i;
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ port = serial->port[i];
+ if (port)
+ usb_serial_port_unpoison_urbs(port);
+ }
+}
+
int usb_serial_resume(struct usb_interface *intf)
{
struct usb_serial *serial = usb_get_intfdata(intf);
int rv;
+ usb_serial_unpoison_port_urbs(serial);
+
serial->suspending = 0;
if (serial->type->resume)
rv = serial->type->resume(serial);
struct usb_serial *serial = usb_get_intfdata(intf);
int rv;
+ usb_serial_unpoison_port_urbs(serial);
+
serial->suspending = 0;
if (serial->type->reset_resume)
rv = serial->type->reset_resume(serial);
do { \
if (!type->function) { \
type->function = usb_serial_generic_##function; \
- pr_debug("Had to override the " #function \
- " usb serial operation with the generic one.");\
- } \
+ pr_debug("%s: using generic " #function "\n", \
+ type->driver.name); \
+ } \
} while (0)
-static void fixup_generic(struct usb_serial_driver *device)
+static void usb_serial_operations_init(struct usb_serial_driver *device)
{
set_to_generic_if_null(device, open);
set_to_generic_if_null(device, write);
set_to_generic_if_null(device, chars_in_buffer);
set_to_generic_if_null(device, read_bulk_callback);
set_to_generic_if_null(device, write_bulk_callback);
- set_to_generic_if_null(device, disconnect);
- set_to_generic_if_null(device, release);
set_to_generic_if_null(device, process_read_urb);
set_to_generic_if_null(device, prepare_write_buffer);
}
if (usb_disabled())
return -ENODEV;
- fixup_generic(driver);
-
if (!driver->description)
driver->description = driver->driver.name;
if (!driver->usb_driver) {
return -EINVAL;
}
+ usb_serial_operations_init(driver);
+
/* Add this device to our list of devices */
mutex_lock(&table_lock);
list_add(&driver->driver_list, &usb_serial_driver_list);
}
EXPORT_SYMBOL_GPL(usb_serial_deregister_drivers);
-/* Module information */
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
projects / ~andy / linux / blobdiff