ALSA: dice: fix detection of Weiss devices
While most DICE devices keep TCAT's default category ID of 0x04, Weiss
devices identify themselves with 0x00.
Reported-by: Rolf Anderegg <rolf.anderegg@weiss.ch>
Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c
index 5f0f102..49d630b 100644
--- a/sound/firewire/dice.c
+++ b/sound/firewire/dice.c
@@ -1109,7 +1109,10 @@
mutex_destroy(&dice->mutex);
}
-#define DICE_CATEGORY_ID 0x04
+#define OUI_WEISS 0x001c6a
+
+#define DICE_CATEGORY_ID 0x04
+#define WEISS_CATEGORY_ID 0x00
static int dice_interface_check(struct fw_unit *unit)
{
@@ -1123,15 +1126,15 @@
struct fw_device *device = fw_parent_device(unit);
struct fw_csr_iterator it;
int key, value, vendor = -1, model = -1, err;
- unsigned int i;
+ unsigned int category, i;
__be32 pointers[ARRAY_SIZE(min_values)];
__be32 version;
/*
* Check that GUID and unit directory are constructed according to DICE
* rules, i.e., that the specifier ID is the GUID's OUI, and that the
- * GUID chip ID consists of the 8-bit DICE category ID, the 10-bit
- * product ID, and a 22-bit serial number.
+ * GUID chip ID consists of the 8-bit category ID, the 10-bit product
+ * ID, and a 22-bit serial number.
*/
fw_csr_iterator_init(&it, unit->directory);
while (fw_csr_iterator_next(&it, &key, &value)) {
@@ -1144,7 +1147,11 @@
break;
}
}
- if (device->config_rom[3] != ((vendor << 8) | DICE_CATEGORY_ID) ||
+ if (vendor == OUI_WEISS)
+ category = WEISS_CATEGORY_ID;
+ else
+ category = DICE_CATEGORY_ID;
+ if (device->config_rom[3] != ((vendor << 8) | category) ||
device->config_rom[4] >> 22 != model)
return -ENODEV;