From 5e688883563ef62bd3725922f1a795a8253df499 Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Sat, 8 May 2010 11:24:56 +0200 Subject: ALSA: sound/usb: fix UAC1 regression Commit 23caaf19b ("ALSA: usb-mixer: Add support for Audio Class v2.0") broke support for Class1 devices due to two faulty changes. This patch fixes it. Signed-off-by: Daniel Mack Reported-and-Tested-by: The Source Cc: Clemens Ladisch Signed-off-by: Takashi Iwai --- sound/usb/mixer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sound/usb/mixer.c') diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index 1deef623c081..e350f053440a 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -656,7 +656,7 @@ static int check_input_term(struct mixer_build *state, int id, struct usb_audio_ case UAC_FEATURE_UNIT: { /* the header is the same for v1 and v2 */ struct uac_feature_unit_descriptor *d = p1; - id = d->bUnitID; + id = d->bSourceID; break; /* continue to parse */ } case UAC_MIXER_UNIT: { -- cgit v1.2.3 From e213e9cf707c51808e372dabd1070a61af17e77b Mon Sep 17 00:00:00 2001 From: Daniel Mack Date: Tue, 11 May 2010 18:13:50 +0200 Subject: ALSA: sound/usb: add preliminary support for UAC2 interrupts For both UAC1 and UAC2, interrupt endpoint messages are now parsed with structs rather that with anonymous buffer array accesses. For UAC2, only CUR interrupt notifications are supported for now. snd_usb_mixer_status_complete() was renamed to snd_usb_mixer_interrupt(). Fixed one indentation flaw on the way. Signed-off-by: Daniel Mack Cc: Clemens Ladisch Signed-off-by: Takashi Iwai --- sound/usb/mixer.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 85 insertions(+), 13 deletions(-) (limited to 'sound/usb/mixer.c') diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c index e350f053440a..820dfe08ac22 100644 --- a/sound/usb/mixer.c +++ b/sound/usb/mixer.c @@ -1443,8 +1443,8 @@ static struct procunit_info procunits[] = { * predefined data for extension units */ static struct procunit_value_info clock_rate_xu_info[] = { - { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, - { 0 } + { USB_XU_CLOCK_RATE_SELECTOR, "Selector", USB_MIXER_U8, 0 }, + { 0 } }; static struct procunit_value_info clock_source_xu_info[] = { { USB_XU_CLOCK_SOURCE_SELECTOR, "External", USB_MIXER_BOOLEAN }, @@ -1967,26 +1967,98 @@ static void snd_usb_mixer_proc_read(struct snd_info_entry *entry, } } -static void snd_usb_mixer_status_complete(struct urb *urb) +static void snd_usb_mixer_interrupt_v2(struct usb_mixer_interface *mixer, + int attribute, int value, int index) +{ + struct usb_mixer_elem_info *info; + __u8 unitid = (index >> 8) & 0xff; + __u8 control = (value >> 8) & 0xff; + __u8 channel = value & 0xff; + + if (channel >= MAX_CHANNELS) { + snd_printk(KERN_DEBUG "%s(): bogus channel number %d\n", + __func__, channel); + return; + } + + for (info = mixer->id_elems[unitid]; info; info = info->next_id_elem) { + if (info->control != control) + continue; + + switch (attribute) { + case UAC2_CS_CUR: + /* invalidate cache, so the value is read from the device */ + if (channel) + info->cached &= ~(1 << channel); + else /* master channel */ + info->cached = 0; + + snd_ctl_notify(mixer->chip->card, SNDRV_CTL_EVENT_MASK_VALUE, + info->elem_id); + break; + + case UAC2_CS_RANGE: + /* TODO */ + break; + + case UAC2_CS_MEM: + /* TODO */ + break; + + default: + snd_printk(KERN_DEBUG "unknown attribute %d in interrupt\n", + attribute); + break; + } /* switch */ + } +} + +static void snd_usb_mixer_interrupt(struct urb *urb) { struct usb_mixer_interface *mixer = urb->context; + int len = urb->actual_length; + + if (urb->status != 0) + goto requeue; - if (urb->status == 0) { - u8 *buf = urb->transfer_buffer; - int i; + if (mixer->protocol == UAC_VERSION_1) { + struct uac1_status_word *status; - for (i = urb->actual_length; i >= 2; buf += 2, i -= 2) { + for (status = urb->transfer_buffer; + len >= sizeof(*status); + len -= sizeof(*status), status++) { snd_printd(KERN_DEBUG "status interrupt: %02x %02x\n", - buf[0], buf[1]); + status->bStatusType, + status->bOriginator); + /* ignore any notifications not from the control interface */ - if ((buf[0] & 0x0f) != 0) + if ((status->bStatusType & UAC1_STATUS_TYPE_ORIG_MASK) != + UAC1_STATUS_TYPE_ORIG_AUDIO_CONTROL_IF) continue; - if (!(buf[0] & 0x40)) - snd_usb_mixer_notify_id(mixer, buf[1]); + + if (status->bStatusType & UAC1_STATUS_TYPE_MEM_CHANGED) + snd_usb_mixer_rc_memory_change(mixer, status->bOriginator); else - snd_usb_mixer_rc_memory_change(mixer, buf[1]); + snd_usb_mixer_notify_id(mixer, status->bOriginator); + } + } else { /* UAC_VERSION_2 */ + struct uac2_interrupt_data_msg *msg; + + for (msg = urb->transfer_buffer; + len >= sizeof(*msg); + len -= sizeof(*msg), msg++) { + /* drop vendor specific and endpoint requests */ + if ((msg->bInfo & UAC2_INTERRUPT_DATA_MSG_VENDOR) || + (msg->bInfo & UAC2_INTERRUPT_DATA_MSG_EP)) + continue; + + snd_usb_mixer_interrupt_v2(mixer, msg->bAttribute, + le16_to_cpu(msg->wValue), + le16_to_cpu(msg->wIndex)); } } + +requeue: if (urb->status != -ENOENT && urb->status != -ECONNRESET) { urb->dev = mixer->chip->dev; usb_submit_urb(urb, GFP_ATOMIC); @@ -2023,7 +2095,7 @@ static int snd_usb_mixer_status_create(struct usb_mixer_interface *mixer) usb_fill_int_urb(mixer->urb, mixer->chip->dev, usb_rcvintpipe(mixer->chip->dev, epnum), transfer_buffer, buffer_length, - snd_usb_mixer_status_complete, mixer, ep->bInterval); + snd_usb_mixer_interrupt, mixer, ep->bInterval); usb_submit_urb(mixer->urb, GFP_KERNEL); return 0; } -- cgit v1.2.3