am7xxx: improve setting USB configuration and interface_number

There are devices out there with different bConfigurationValue or
bInterfaceNumber, having the ability to specify these setting on
a per-device basis makes it easier to add support for them.

diff --git a/src/am7xxx.c b/src/am7xxx.c
index e809c55..94765c1 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -68,6 +68,8 @@ struct am7xxx_usb_device_descriptor {
        const char *name;
        uint16_t vendor_id;
        uint16_t product_id;
+       uint8_t configuration;    /* The bConfigurationValue of the device */
+       uint8_t interface_number; /* The bInterfaceNumber of the device */
 };
 
 static struct am7xxx_usb_device_descriptor supported_devices[] = {
@@ -75,26 +77,36 @@ static struct am7xxx_usb_device_descriptor supported_devices[] = {
                .name       = "Acer C110",
                .vendor_id  = 0x1de1,
                .product_id = 0xc101,
+               .configuration    = 2,
+               .interface_number = 0,
        },
        {
                .name       = "Acer C112",
                .vendor_id  = 0x1de1,
                .product_id = 0x5501,
+               .configuration    = 2,
+               .interface_number = 0,
        },
        {
                .name       ="Aiptek PocketCinema T25",
                .vendor_id  = 0x08ca,
                .product_id = 0x2144,
+               .configuration    = 2,
+               .interface_number = 0,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 1020",
                .vendor_id  = 0x21e7,
                .product_id = 0x000e,
+               .configuration    = 2,
+               .interface_number = 0,
        },
        {
                .name       = "Philips/Sagemcom PicoPix 2055",
                .vendor_id  = 0x21e7,
                .product_id = 0x0016,
+               .configuration    = 2,
+               .interface_number = 0,
        },
 };
 
@@ -606,17 +618,21 @@ static int scan_devices(am7xxx_context *ctx, scan_op op,
                                         * close it again before bailing out.
                                         */
 
-                                       ret = libusb_set_configuration((*dev)->usb_device, 2);
+                                       ret = libusb_set_configuration((*dev)->usb_device,
+                                                                      (*dev)->desc->configuration);
                                        if (ret < 0) {
                                                debug(ctx, "libusb_set_configuration failed\n");
-                                               debug(ctx, "Cannot set configuration 2\n");
+                                               debug(ctx, "Cannot set configuration %hhu\n",
+                                                     (*dev)->desc->configuration);
                                                goto out_libusb_close;
                                        }
 
-                                       ret = libusb_claim_interface((*dev)->usb_device, 0);
+                                       ret = libusb_claim_interface((*dev)->usb_device,
+                                                                    (*dev)->desc->interface_number);
                                        if (ret < 0) {
                                                debug(ctx, "libusb_claim_interface failed\n");
-                                               debug(ctx, "Cannot claim interface 0\n");
+                                               debug(ctx, "Cannot claim interface %hhu\n",
+                                                     (*dev)->desc->interface_number);
 out_libusb_close:
                                                libusb_close((*dev)->usb_device);
                                                (*dev)->usb_device = NULL;
@@ -758,7 +774,7 @@ AM7XXX_PUBLIC int am7xxx_close_device(am7xxx_device *dev)
                return -EINVAL;
        }
        if (dev->usb_device) {
-               libusb_release_interface(dev->usb_device, 0);
+               libusb_release_interface(dev->usb_device, dev->desc->interface_number);
                libusb_close(dev->usb_device);
                dev->usb_device = NULL;
        }