ALSA: usb-audio - Added functionality for E-mu 0404USB/0202USB/TrackerPre

[safe/jmp/linux-2.6] / sound / usb / usbaudio.c

diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index 31b63ea..286fa14 100644 (file)
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1271,6 +1271,47 @@ static int init_usb_sample_rate(struct usb_device *dev, int iface,
 }
 
 /*
+ * For E-Mu 0404USB/0202USB/TrackerPre sample rate should be set for device,
+ * not for interface.
+ */
+static void set_format_emu_quirk(struct snd_usb_substream *subs,
+                                struct audioformat *fmt)
+{
+       unsigned char emu_samplerate_id = 0;
+
+       /* When capture is active
+        * sample rate shouldn't be changed
+        * by playback substream
+        */
+       if (subs->direction == SNDRV_PCM_STREAM_PLAYBACK) {
+               if (subs->stream->substream[SNDRV_PCM_STREAM_CAPTURE].interface != -1)
+                       return;
+       }
+
+       switch (fmt->rate_min) {
+       case 48000:
+               emu_samplerate_id = EMU_QUIRK_SR_48000HZ;
+               break;
+       case 88200:
+               emu_samplerate_id = EMU_QUIRK_SR_88200HZ;
+               break;
+       case 96000:
+               emu_samplerate_id = EMU_QUIRK_SR_96000HZ;
+               break;
+       case 176400:
+               emu_samplerate_id = EMU_QUIRK_SR_176400HZ;
+               break;
+       case 192000:
+               emu_samplerate_id = EMU_QUIRK_SR_192000HZ;
+               break;
+       default:
+               emu_samplerate_id = EMU_QUIRK_SR_44100HZ;
+               break;
+       }
+       snd_emuusb_set_samplerate(subs->stream->chip, emu_samplerate_id);
+}
+
+/*
  * find a matching format and set up the interface
  */
 static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
@@ -1383,6 +1424,14 @@ static int set_format(struct snd_usb_substream *subs, struct audioformat *fmt)
 
        subs->cur_audiofmt = fmt;
 
+       switch (subs->stream->chip->usb_id) {
+       case USB_ID(0x041e, 0x3f02): /* E-Mu 0202 USB */
+       case USB_ID(0x041e, 0x3f04): /* E-Mu 0404 USB */
+       case USB_ID(0x041e, 0x3f0a): /* E-Mu Tracker Pre */
+               set_format_emu_quirk(subs, fmt);
+               break;
+       }
+
 #if 0
        printk(KERN_DEBUG
               "setting done: format = %d, rate = %d..%d, channels = %d\n",