Commit 45e5d4d4 authored by Johan Hovold's avatar Johan Hovold

USB: serial: refactor port endpoint setup

Make the probe callback more readable by refactoring the port
endpoint-resource setup by adding four helper functions.
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
parent 08f741a9
......@@ -742,6 +742,124 @@ static void find_endpoints(struct usb_serial *serial,
}
}
static int setup_port_bulk_in(struct usb_serial_port *port,
struct usb_endpoint_descriptor *epd)
{
struct usb_serial_driver *type = port->serial->type;
struct usb_device *udev = port->serial->dev;
int buffer_size;
int i;
buffer_size = max_t(int, type->bulk_in_size, usb_endpoint_maxp(epd));
port->bulk_in_size = buffer_size;
port->bulk_in_endpointAddress = epd->bEndpointAddress;
for (i = 0; i < ARRAY_SIZE(port->read_urbs); ++i) {
set_bit(i, &port->read_urbs_free);
port->read_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
if (!port->read_urbs[i])
return -ENOMEM;
port->bulk_in_buffers[i] = kmalloc(buffer_size, GFP_KERNEL);
if (!port->bulk_in_buffers[i])
return -ENOMEM;
usb_fill_bulk_urb(port->read_urbs[i], udev,
usb_rcvbulkpipe(udev, epd->bEndpointAddress),
port->bulk_in_buffers[i], buffer_size,
type->read_bulk_callback, port);
}
port->read_urb = port->read_urbs[0];
port->bulk_in_buffer = port->bulk_in_buffers[0];
return 0;
}
static int setup_port_bulk_out(struct usb_serial_port *port,
struct usb_endpoint_descriptor *epd)
{
struct usb_serial_driver *type = port->serial->type;
struct usb_device *udev = port->serial->dev;
int buffer_size;
int i;
if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
return -ENOMEM;
if (type->bulk_out_size)
buffer_size = type->bulk_out_size;
else
buffer_size = usb_endpoint_maxp(epd);
port->bulk_out_size = buffer_size;
port->bulk_out_endpointAddress = epd->bEndpointAddress;
for (i = 0; i < ARRAY_SIZE(port->write_urbs); ++i) {
set_bit(i, &port->write_urbs_free);
port->write_urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
if (!port->write_urbs[i])
return -ENOMEM;
port->bulk_out_buffers[i] = kmalloc(buffer_size, GFP_KERNEL);
if (!port->bulk_out_buffers[i])
return -ENOMEM;
usb_fill_bulk_urb(port->write_urbs[i], udev,
usb_sndbulkpipe(udev, epd->bEndpointAddress),
port->bulk_out_buffers[i], buffer_size,
type->write_bulk_callback, port);
}
port->write_urb = port->write_urbs[0];
port->bulk_out_buffer = port->bulk_out_buffers[0];
return 0;
}
static int setup_port_interrupt_in(struct usb_serial_port *port,
struct usb_endpoint_descriptor *epd)
{
struct usb_serial_driver *type = port->serial->type;
struct usb_device *udev = port->serial->dev;
int buffer_size;
port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!port->interrupt_in_urb)
return -ENOMEM;
buffer_size = usb_endpoint_maxp(epd);
port->interrupt_in_endpointAddress = epd->bEndpointAddress;
port->interrupt_in_buffer = kmalloc(buffer_size, GFP_KERNEL);
if (!port->interrupt_in_buffer)
return -ENOMEM;
usb_fill_int_urb(port->interrupt_in_urb, udev,
usb_rcvintpipe(udev, epd->bEndpointAddress),
port->interrupt_in_buffer, buffer_size,
type->read_int_callback, port,
epd->bInterval);
return 0;
}
static int setup_port_interrupt_out(struct usb_serial_port *port,
struct usb_endpoint_descriptor *epd)
{
struct usb_serial_driver *type = port->serial->type;
struct usb_device *udev = port->serial->dev;
int buffer_size;
port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
if (!port->interrupt_out_urb)
return -ENOMEM;
buffer_size = usb_endpoint_maxp(epd);
port->interrupt_out_size = buffer_size;
port->interrupt_out_endpointAddress = epd->bEndpointAddress;
port->interrupt_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
if (!port->interrupt_out_buffer)
return -ENOMEM;
usb_fill_int_urb(port->interrupt_out_urb, udev,
usb_sndintpipe(udev, epd->bEndpointAddress),
port->interrupt_out_buffer, buffer_size,
type->write_int_callback, port,
epd->bInterval);
return 0;
}
static int usb_serial_probe(struct usb_interface *interface,
const struct usb_device_id *id)
{
......@@ -749,13 +867,10 @@ static int usb_serial_probe(struct usb_interface *interface,
struct usb_device *dev = interface_to_usbdev(interface);
struct usb_serial *serial = NULL;
struct usb_serial_port *port;
struct usb_endpoint_descriptor *endpoint;
struct usb_serial_endpoints *epds;
struct usb_serial_driver *type = NULL;
int retval;
int buffer_size;
int i;
int j;
int num_ports = 0;
unsigned char max_endpoints;
......@@ -867,86 +982,24 @@ static int usb_serial_probe(struct usb_interface *interface,
/* set up the endpoint information */
for (i = 0; i < epds->num_bulk_in; ++i) {
endpoint = epds->bulk_in[i];
port = serial->port[i];
buffer_size = max_t(int, serial->type->bulk_in_size,
usb_endpoint_maxp(endpoint));
port->bulk_in_size = buffer_size;
port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
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])
goto probe_error;
port->bulk_in_buffers[j] = kmalloc(buffer_size,
GFP_KERNEL);
if (!port->bulk_in_buffers[j])
retval = setup_port_bulk_in(serial->port[i], epds->bulk_in[i]);
if (retval)
goto probe_error;
usb_fill_bulk_urb(port->read_urbs[j], dev,
usb_rcvbulkpipe(dev,
endpoint->bEndpointAddress),
port->bulk_in_buffers[j], buffer_size,
serial->type->read_bulk_callback,
port);
}
port->read_urb = port->read_urbs[0];
port->bulk_in_buffer = port->bulk_in_buffers[0];
}
for (i = 0; i < epds->num_bulk_out; ++i) {
endpoint = epds->bulk_out[i];
port = serial->port[i];
if (kfifo_alloc(&port->write_fifo, PAGE_SIZE, GFP_KERNEL))
goto probe_error;
buffer_size = serial->type->bulk_out_size;
if (!buffer_size)
buffer_size = usb_endpoint_maxp(endpoint);
port->bulk_out_size = buffer_size;
port->bulk_out_endpointAddress = 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])
goto probe_error;
port->bulk_out_buffers[j] = kmalloc(buffer_size,
GFP_KERNEL);
if (!port->bulk_out_buffers[j])
retval = setup_port_bulk_out(serial->port[i],
epds->bulk_out[i]);
if (retval)
goto probe_error;
usb_fill_bulk_urb(port->write_urbs[j], dev,
usb_sndbulkpipe(dev,
endpoint->bEndpointAddress),
port->bulk_out_buffers[j], buffer_size,
serial->type->write_bulk_callback,
port);
}
port->write_urb = port->write_urbs[0];
port->bulk_out_buffer = port->bulk_out_buffers[0];
}
if (serial->type->read_int_callback) {
for (i = 0; i < epds->num_interrupt_in; ++i) {
endpoint = epds->interrupt_in[i];
port = serial->port[i];
port->interrupt_in_urb = usb_alloc_urb(0, GFP_KERNEL);
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)
retval = setup_port_interrupt_in(serial->port[i],
epds->interrupt_in[i]);
if (retval)
goto probe_error;
usb_fill_int_urb(port->interrupt_in_urb, dev,
usb_rcvintpipe(dev,
endpoint->bEndpointAddress),
port->interrupt_in_buffer, buffer_size,
serial->type->read_int_callback, port,
endpoint->bInterval);
}
} else if (epds->num_interrupt_in) {
dev_dbg(ddev, "The device claims to support interrupt in transfers, but read_int_callback is not defined\n");
......@@ -954,25 +1007,10 @@ static int usb_serial_probe(struct usb_interface *interface,
if (serial->type->write_int_callback) {
for (i = 0; i < epds->num_interrupt_out; ++i) {
endpoint = epds->interrupt_out[i];
port = serial->port[i];
port->interrupt_out_urb = usb_alloc_urb(0, GFP_KERNEL);
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)
retval = setup_port_interrupt_out(serial->port[i],
epds->interrupt_out[i]);
if (retval)
goto probe_error;
usb_fill_int_urb(port->interrupt_out_urb, dev,
usb_sndintpipe(dev,
endpoint->bEndpointAddress),
port->interrupt_out_buffer, buffer_size,
serial->type->write_int_callback, port,
endpoint->bInterval);
}
} else if (epds->num_interrupt_out) {
dev_dbg(ddev, "The device claims to support interrupt out transfers, but write_int_callback is not defined\n");
......
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