diff options
| -rw-r--r-- | drivers/usb/serial/ipaq.c | 43 |
1 files changed, 37 insertions, 6 deletions
diff --git a/drivers/usb/serial/ipaq.c b/drivers/usb/serial/ipaq.c index 132be74d2b8..ef92095b073 100644 --- a/drivers/usb/serial/ipaq.c +++ b/drivers/usb/serial/ipaq.c @@ -78,6 +78,7 @@ static int ipaq_open(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); static void ipaq_close(struct tty_struct *tty, struct usb_serial_port *port, struct file *filp); +static int ipaq_calc_num_ports(struct usb_serial *serial); static int ipaq_startup(struct usb_serial *serial); static void ipaq_shutdown(struct usb_serial *serial); static int ipaq_write(struct tty_struct *tty, struct usb_serial_port *port, @@ -572,15 +573,10 @@ static struct usb_serial_driver ipaq_device = { .description = "PocketPC PDA", .usb_driver = &ipaq_driver, .id_table = ipaq_id_table, - /* - * some devices have an extra endpoint, which - * must be ignored as it would make the core - * create a second port which oopses when used - */ - .num_ports = 1, .open = ipaq_open, .close = ipaq_close, .attach = ipaq_startup, + .calc_num_ports = ipaq_calc_num_ports, .shutdown = ipaq_shutdown, .write = ipaq_write, .write_room = ipaq_write_room, @@ -956,14 +952,49 @@ static void ipaq_destroy_lists(struct usb_serial_port *port) } +static int ipaq_calc_num_ports(struct usb_serial *serial) +{ + /* + * some devices have 3 endpoints, the 3rd of which + * must be ignored as it would make the core + * create a second port which oopses when used + */ + int ipaq_num_ports = 1; + + dbg("%s - numberofendpoints: %d", __FUNCTION__, + (int)serial->interface->cur_altsetting->desc.bNumEndpoints); + + /* + * a few devices have 4 endpoints, seemingly Yakuma devices, + * and we need the second pair, so let them have 2 ports + * + * TODO: can we drop port 1 ? + */ + if (serial->interface->cur_altsetting->desc.bNumEndpoints > 3) { + ipaq_num_ports = 2; + } + + return ipaq_num_ports; +} + + static int ipaq_startup(struct usb_serial *serial) { dbg("%s", __func__); if (serial->dev->actconfig->desc.bConfigurationValue != 1) { + /* + * FIXME: HP iPaq rx3715, possibly others, have 1 config that + * is labeled as 2 + */ + dev_err(&serial->dev->dev, "active config #%d != 1 ??\n", serial->dev->actconfig->desc.bConfigurationValue); return -ENODEV; } + + dbg("%s - iPAQ module configured for %d ports", + __FUNCTION__, serial->num_ports); + return usb_reset_configuration(serial->dev); } |