USB: serial: allow subdrivers to modify port-endpoint mapping
Allow subdrivers to modify the port-endpoint mapping by passing the
endpoint descriptors to calc_num_ports.
The callback can now also be used to verify that the required endpoints
exists and abort probing otherwise.
This will allow us to get rid of a few hacks in subdrivers that are
already modifying the port-endpoint mapping (or aborting probe due to
missing endpoints), but only after the port structures have been setup.
Signed-off-by: Johan Hovold <johan@kernel.org>
diff --git a/drivers/usb/serial/f81534.c b/drivers/usb/serial/f81534.c
index 22f23a4..385087c 100644
--- a/drivers/usb/serial/f81534.c
+++ b/drivers/usb/serial/f81534.c
@@ -611,7 +611,8 @@
* The f81534_calc_num_ports() will run to "new style" with checking
* F81534_PORT_UNAVAILABLE section.
*/
-static int f81534_calc_num_ports(struct usb_serial *serial)
+static int f81534_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
u8 setting[F81534_CUSTOM_DATA_SIZE];
u8 setting_idx;
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c
index ec1b8f2..df5f1a7 100644
--- a/drivers/usb/serial/ipaq.c
+++ b/drivers/usb/serial/ipaq.c
@@ -33,7 +33,8 @@
/* Function prototypes for an ipaq */
static int ipaq_open(struct tty_struct *tty,
struct usb_serial_port *port);
-static int ipaq_calc_num_ports(struct usb_serial *serial);
+static int ipaq_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds);
static int ipaq_startup(struct usb_serial *serial);
static const struct usb_device_id ipaq_id_table[] = {
@@ -550,7 +551,8 @@
return usb_serial_generic_open(tty, port);
}
-static int ipaq_calc_num_ports(struct usb_serial *serial)
+static int ipaq_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
/*
* some devices have 3 endpoints, the 3rd of which
diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c
index df45eba..9ec3e4f 100644
--- a/drivers/usb/serial/mos7720.c
+++ b/drivers/usb/serial/mos7720.c
@@ -973,7 +973,8 @@
tty_port_tty_wakeup(&mos7720_port->port->port);
}
-static int mos77xx_calc_num_ports(struct usb_serial *serial)
+static int mos77xx_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
if (product == MOSCHIP_DEVICE_ID_7715)
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c
index 3821c53..326d6c5 100644
--- a/drivers/usb/serial/mos7840.c
+++ b/drivers/usb/serial/mos7840.c
@@ -2104,7 +2104,8 @@
return 0;
}
-static int mos7840_calc_num_ports(struct usb_serial *serial)
+static int mos7840_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
int device_type = (unsigned long)usb_get_serial_data(serial);
int mos7840_num_ports;
diff --git a/drivers/usb/serial/mxuport.c b/drivers/usb/serial/mxuport.c
index c88215a..bf543e6 100644
--- a/drivers/usb/serial/mxuport.c
+++ b/drivers/usb/serial/mxuport.c
@@ -946,7 +946,8 @@
* Determine how many ports this device has dynamically. It will be
* called after the probe() callback is called, but before attach().
*/
-static int mxuport_calc_num_ports(struct usb_serial *serial)
+static int mxuport_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
unsigned long features = (unsigned long)usb_get_serial_data(serial);
diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c
index fdbb904..6ddcaa2 100644
--- a/drivers/usb/serial/quatech2.c
+++ b/drivers/usb/serial/quatech2.c
@@ -246,7 +246,8 @@
return status;
}
-static int qt2_calc_num_ports(struct usb_serial *serial)
+static int qt2_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
struct qt2_device_detail d;
int i;
diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c
index 465e851..4c4ac47 100644
--- a/drivers/usb/serial/sierra.c
+++ b/drivers/usb/serial/sierra.c
@@ -85,7 +85,8 @@
USB_CTRL_SET_TIMEOUT); /* int timeout */
}
-static int sierra_calc_num_ports(struct usb_serial *serial)
+static int sierra_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
int num_ports = 0;
u8 ifnum, numendpoints;
diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c
index 747dd41..f0761f4 100644
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -710,17 +710,6 @@
.shutdown = serial_port_shutdown,
};
-struct usb_serial_endpoints {
- unsigned char num_bulk_in;
- unsigned char num_bulk_out;
- unsigned char num_interrupt_in;
- unsigned char num_interrupt_out;
- struct usb_endpoint_descriptor *bulk_in[MAX_NUM_PORTS];
- struct usb_endpoint_descriptor *bulk_out[MAX_NUM_PORTS];
- struct usb_endpoint_descriptor *interrupt_in[MAX_NUM_PORTS];
- struct usb_endpoint_descriptor *interrupt_out[MAX_NUM_PORTS];
-};
-
static void find_endpoints(struct usb_serial *serial,
struct usb_serial_endpoints *epds)
{
@@ -875,8 +864,12 @@
#endif
if (!num_ports) {
/* if this device type has a calc_num_ports function, call it */
- if (type->calc_num_ports)
- num_ports = type->calc_num_ports(serial);
+ if (type->calc_num_ports) {
+ retval = type->calc_num_ports(serial, epds);
+ if (retval < 0)
+ goto err_free_epds;
+ num_ports = retval;
+ }
if (!num_ports)
num_ports = type->num_ports;
}
diff --git a/drivers/usb/serial/visor.c b/drivers/usb/serial/visor.c
index 337a0be..3f943f8 100644
--- a/drivers/usb/serial/visor.c
+++ b/drivers/usb/serial/visor.c
@@ -40,7 +40,8 @@
static void visor_close(struct usb_serial_port *port);
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 int visor_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds);
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);
@@ -466,7 +467,8 @@
return retval;
}
-static int visor_calc_num_ports(struct usb_serial *serial)
+static int visor_calc_num_ports(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds)
{
int num_ports = (int)(long)(usb_get_serial_data(serial));
diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h
index f1b8a84..da52881 100644
--- a/include/linux/usb/serial.h
+++ b/include/linux/usb/serial.h
@@ -181,6 +181,17 @@
serial->private = data;
}
+struct usb_serial_endpoints {
+ unsigned char num_bulk_in;
+ unsigned char num_bulk_out;
+ unsigned char num_interrupt_in;
+ unsigned char num_interrupt_out;
+ struct usb_endpoint_descriptor *bulk_in[MAX_NUM_PORTS];
+ struct usb_endpoint_descriptor *bulk_out[MAX_NUM_PORTS];
+ struct usb_endpoint_descriptor *interrupt_in[MAX_NUM_PORTS];
+ struct usb_endpoint_descriptor *interrupt_out[MAX_NUM_PORTS];
+};
+
/**
* usb_serial_driver - describes a usb serial driver
* @description: pointer to a string that describes this driver. This string
@@ -196,8 +207,9 @@
* (0 = end-point size)
* @bulk_out_size: bytes to allocate for bulk-out buffer (0 = end-point size)
* @calc_num_ports: pointer to a function to determine how many ports this
- * device has dynamically. It will be called after the probe()
- * callback is called, but before attach()
+ * device has dynamically. It can also be used to verify the number of
+ * endpoints or to modify the port-endpoint mapping. It will be called
+ * after the probe() callback is called, but before attach().
* @probe: pointer to the driver's probe function.
* This will be called when the device is inserted into the system,
* but before the device has been fully initialized by the usb_serial
@@ -249,7 +261,8 @@
int (*probe)(struct usb_serial *serial, const struct usb_device_id *id);
int (*attach)(struct usb_serial *serial);
- int (*calc_num_ports) (struct usb_serial *serial);
+ int (*calc_num_ports)(struct usb_serial *serial,
+ struct usb_serial_endpoints *epds);
void (*disconnect)(struct usb_serial *serial);
void (*release)(struct usb_serial *serial);