From a471fcde8c2c4b65f110bb4210af3513ee4deeb8 Mon Sep 17 00:00:00 2001 From: Clemens Ladisch Date: Mon, 13 Feb 2012 21:55:13 +0100 Subject: [PATCH] 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 Signed-off-by: Clemens Ladisch --- sound/firewire/dice.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/sound/firewire/dice.c b/sound/firewire/dice.c index 5f0f102cf5f9..49d630ba2d9f 100644 --- a/sound/firewire/dice.c +++ b/sound/firewire/dice.c @@ -1109,7 +1109,10 @@ static void dice_card_free(struct snd_card *card) 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 @@ static int dice_interface_check(struct fw_unit *unit) 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 @@ static int dice_interface_check(struct fw_unit *unit) 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;