diff options
Diffstat (limited to 'sound/usb/quirks.c')
| -rw-r--r-- | sound/usb/quirks.c | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c index f104c68fe1e0..2c971858d6b7 100644 --- a/sound/usb/quirks.c +++ b/sound/usb/quirks.c @@ -306,7 +306,6 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip, [QUIRK_MIDI_YAMAHA] = create_any_midi_quirk, [QUIRK_MIDI_MIDIMAN] = create_any_midi_quirk, [QUIRK_MIDI_NOVATION] = create_any_midi_quirk, - [QUIRK_MIDI_MBOX2] = create_any_midi_quirk, [QUIRK_MIDI_RAW_BYTES] = create_any_midi_quirk, [QUIRK_MIDI_EMAGIC] = create_any_midi_quirk, [QUIRK_MIDI_CME] = create_any_midi_quirk, @@ -388,11 +387,13 @@ static int snd_usb_fasttrackpro_boot_quirk(struct usb_device *dev) * rules */ err = usb_driver_set_configuration(dev, 2); - if (err < 0) { + if (err < 0) snd_printdd("error usb_driver_set_configuration: %d\n", err); - return -ENODEV; - } + /* Always return an error, so that we stop creating a device + that will just be destroyed and recreated with a new + configuration */ + return -ENODEV; } else snd_printk(KERN_INFO "usb-audio: Fast Track Pro config OK\n"); @@ -528,11 +529,11 @@ static void mbox2_setup_48_24_magic(struct usb_device *dev) #define MBOX2_BOOT_LOADING 0x01 /* Hard coded into the device */ #define MBOX2_BOOT_READY 0x02 /* Hard coded into the device */ -int snd_usb_mbox2_boot_quirk(struct usb_device *dev) +static int snd_usb_mbox2_boot_quirk(struct usb_device *dev) { struct usb_host_config *config = dev->actconfig; int err; - u8 bootresponse; + u8 bootresponse[12]; int fwsize; int count; @@ -546,20 +547,20 @@ int snd_usb_mbox2_boot_quirk(struct usb_device *dev) snd_printd("usb-audio: Sending Digidesign Mbox 2 boot sequence...\n"); count = 0; - bootresponse = MBOX2_BOOT_LOADING; - while ((bootresponse == MBOX2_BOOT_LOADING) && (count < 10)) { + bootresponse[0] = MBOX2_BOOT_LOADING; + while ((bootresponse[0] == MBOX2_BOOT_LOADING) && (count < 10)) { msleep(500); /* 0.5 second delay */ snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), /* Control magic - load onboard firmware */ 0x85, 0xc0, 0x0001, 0x0000, &bootresponse, 0x0012); - if (bootresponse == MBOX2_BOOT_READY) + if (bootresponse[0] == MBOX2_BOOT_READY) break; snd_printd("usb-audio: device not ready, resending boot sequence...\n"); count++; } - if (bootresponse != MBOX2_BOOT_READY) { - snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse); + if (bootresponse[0] != MBOX2_BOOT_READY) { + snd_printk(KERN_ERR "usb-audio: Unknown bootresponse=%d, or timed out, ignoring device.\n", bootresponse[0]); return -ENODEV; } @@ -660,7 +661,6 @@ static int audiophile_skip_setting_quirk(struct snd_usb_audio *chip, return 0; /* keep this altsetting */ } - static int fasttrackpro_skip_setting_quirk(struct snd_usb_audio *chip, int iface, int altno) { @@ -861,6 +861,17 @@ void snd_usb_endpoint_start_quirk(struct snd_usb_endpoint *ep) if ((le16_to_cpu(ep->chip->dev->descriptor.idVendor) == 0x23ba) && ep->type == SND_USB_ENDPOINT_TYPE_SYNC) ep->skip_packets = 4; + + /* + * M-Audio Fast Track C400 - when packets are not skipped, real world + * latency varies by approx. +/- 50 frames (at 96KHz) each time the + * stream is (re)started. When skipping packets 16 at endpoint start + * up, the real world latency is stable within +/- 1 frame (also + * across power cycles). + */ + if (ep->chip->usb_id == USB_ID(0x0763, 0x2030) && + ep->type == SND_USB_ENDPOINT_TYPE_DATA) + ep->skip_packets = 16; } void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe, |