ALSA: usb-audio: M-Audio FT C400 skip packet quirk

[karo-tx-linux.git] / sound / usb / quirks.c

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 007fcecdf5cd1fa9536a24d6cac9059071393c69..2c971858d6b70a146e57266bfa0afe7a1bfe80cb 100644 (file)
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -387,11 +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");
 
@@ -497,6 +499,92 @@ static int snd_usb_nativeinstruments_boot_quirk(struct usb_device *dev)
        return -EAGAIN;
 }
 
+static void mbox2_setup_48_24_magic(struct usb_device *dev)
+{
+       u8 srate[3];
+       u8 temp[12];
+
+       /* Choose 48000Hz permanently */
+       srate[0] = 0x80;
+       srate[1] = 0xbb;
+       srate[2] = 0x00;
+
+       /* Send the magic! */
+       snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0),
+               0x01, 0x22, 0x0100, 0x0085, &temp, 0x0003);
+       snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
+               0x81, 0xa2, 0x0100, 0x0085, &srate, 0x0003);
+       snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
+               0x81, 0xa2, 0x0100, 0x0086, &srate, 0x0003);
+       snd_usb_ctl_msg(dev, usb_sndctrlpipe(dev, 0),
+               0x81, 0xa2, 0x0100, 0x0003, &srate, 0x0003);
+       return;
+}
+
+/* Digidesign Mbox 2 needs to load firmware onboard
+ * and driver must wait a few seconds for initialisation.
+ */
+
+#define MBOX2_FIRMWARE_SIZE    646
+#define MBOX2_BOOT_LOADING     0x01 /* Hard coded into the device */
+#define MBOX2_BOOT_READY       0x02 /* Hard coded into the device */
+
+static int snd_usb_mbox2_boot_quirk(struct usb_device *dev)
+{
+       struct usb_host_config *config = dev->actconfig;
+       int err;
+       u8 bootresponse[12];
+       int fwsize;
+       int count;
+
+       fwsize = le16_to_cpu(get_cfg_desc(config)->wTotalLength);
+
+       if (fwsize != MBOX2_FIRMWARE_SIZE) {
+               snd_printk(KERN_ERR "usb-audio: Invalid firmware size=%d.\n", fwsize);
+               return -ENODEV;
+       }
+
+       snd_printd("usb-audio: Sending Digidesign Mbox 2 boot sequence...\n");
+
+       count = 0;
+       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[0] == MBOX2_BOOT_READY)
+                       break;
+               snd_printd("usb-audio: device not ready, resending boot sequence...\n");
+               count++;
+       }
+
+       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;
+       }
+
+       snd_printdd("usb-audio: device initialised!\n");
+
+       err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
+               &dev->descriptor, sizeof(dev->descriptor));
+       config = dev->actconfig;
+       if (err < 0)
+               snd_printd("error usb_get_descriptor: %d\n", err);
+
+       err = usb_reset_configuration(dev);
+       if (err < 0)
+               snd_printd("error usb_reset_configuration: %d\n", err);
+       snd_printdd("mbox2_boot: new boot length = %d\n",
+               le16_to_cpu(get_cfg_desc(config)->wTotalLength));
+
+       mbox2_setup_48_24_magic(dev);
+
+       snd_printk(KERN_INFO "usb-audio: Digidesign Mbox 2: 24bit 48kHz");
+
+       return 0; /* Successful boot */
+}
+
 /*
  * Setup quirks
  */
@@ -573,7 +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)
 {
@@ -655,6 +742,10 @@ int snd_usb_apply_boot_quirk(struct usb_device *dev,
        case USB_ID(0x0ccd, 0x00b1): /* Terratec Aureon 7.1 USB */
                return snd_usb_cm6206_boot_quirk(dev);
 
+       case USB_ID(0x0dba, 0x3000):
+               /* Digidesign Mbox 2 */
+               return snd_usb_mbox2_boot_quirk(dev);
+
        case USB_ID(0x133e, 0x0815):
                /* Access Music VirusTI Desktop */
                return snd_usb_accessmusic_boot_quirk(dev);
@@ -770,6 +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,