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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>
This commit is contained in:
Johan Hovold 2017-03-16 17:13:30 +01:00
parent 2ac8fc51dd
commit 07814246dd
10 changed files with 42 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/usb/serial/f81534.c
View File

@ -611,7 +611,8 @@ static int f81534_find_config_idx(struct usb_serial *serial, u8 *index)
* 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;

6
drivers/usb/serial/ipaq.c
View File

@ -33,7 +33,8 @@ static int initial_wait;
/* 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 @@ static int ipaq_open(struct tty_struct *tty,
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

3
drivers/usb/serial/mos7720.c
View File

@ -973,7 +973,8 @@ static void mos7720_bulk_out_data_callback(struct urb *urb)
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)

3
drivers/usb/serial/mos7840.c
View File

@ -2104,7 +2104,8 @@ out:
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;

3
drivers/usb/serial/mxuport.c
View File

@ -946,7 +946,8 @@ out:
* 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);

3
drivers/usb/serial/quatech2.c
View File

@ -246,7 +246,8 @@ static inline int update_mctrl(struct qt2_port_private *port_priv,
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;

3
drivers/usb/serial/sierra.c
View File

@ -85,7 +85,8 @@ static int sierra_vsc_set_nmea(struct usb_device *udev, __u16 enable)
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;

19
drivers/usb/serial/usb-serial.c
View File

@ -710,17 +710,6 @@ static const struct tty_port_operations serial_port_ops = {
.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 @@ static int usb_serial_probe(struct usb_interface *interface,
#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;
}

6
drivers/usb/serial/visor.c
View File

@ -40,7 +40,8 @@ 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_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 @@ static int visor_probe(struct usb_serial *serial,
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));

19
include/linux/usb/serial.h
View File

@ -181,6 +181,17 @@ static inline void usb_set_serial_data(struct usb_serial *serial, void *data)
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 @@ static inline void usb_set_serial_data(struct usb_serial *serial, void *data)
* (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 @@ struct usb_serial_driver {
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);