ALSA: 6fire - Add support for S32_LE format

Added support for sample format s32_le.

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 18 insertions, 4 deletions

diff --git a/sound/usb/6fire/pcm.c b/sound/usb/6fire/pcm.c
index 2110cbf35474..7ea698793d43 100644
--- a/sound/usb/6fire/pcm.c
+++ b/sound/usb/6fire/pcm.c
@@ -64,7 +64,7 @@ static const struct snd_pcm_hardware pcm_hw = {
                 SNDRV_PCM_INFO_MMAP_VALID |
                 SNDRV_PCM_INFO_BATCH,
 
-        .formats = SNDRV_PCM_FMTBIT_S24_LE,
+        .formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
 
         .rates = SNDRV_PCM_RATE_44100 |
                 SNDRV_PCM_RATE_48000 |
@@ -228,7 +228,7 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
         unsigned int total_length = 0;
         struct pcm_runtime *rt = snd_pcm_substream_chip(sub->instance);
         struct snd_pcm_runtime *alsa_rt = sub->instance->runtime;
-        u32 *src = (u32 *) urb->buffer;
+        u32 *src = NULL;
         u32 *dest = (u32 *) (alsa_rt->dma_area + sub->dma_off
                         * (alsa_rt->frame_bits >> 3));
         u32 *dest_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
@@ -244,7 +244,12 @@ static void usb6fire_pcm_capture(struct pcm_substream *sub, struct pcm_urb *urb)
                 else
                         frame_count = 0;
 
-                src = (u32 *) (urb->buffer + total_length);
+                if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+                        src = (u32 *) (urb->buffer + total_length);
+                else if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+                        src = (u32 *) (urb->buffer - 1 + total_length);
+                else
+                        return;
                 src++; /* skip leading 4 bytes of every packet */
                 total_length += urb->packets[i].length;
                 for (frame = 0; frame < frame_count; frame++) {
@@ -274,9 +279,18 @@ static void usb6fire_pcm_playback(struct pcm_substream *sub,
                         * (alsa_rt->frame_bits >> 3));
         u32 *src_end = (u32 *) (alsa_rt->dma_area + alsa_rt->buffer_size
                         * (alsa_rt->frame_bits >> 3));
-        u32 *dest = (u32 *) urb->buffer;
+        u32 *dest;
         int bytes_per_frame = alsa_rt->channels << 2;
 
+        if (alsa_rt->format == SNDRV_PCM_FORMAT_S32_LE)
+                dest = (u32 *) (urb->buffer - 1);
+        else if (alsa_rt->format == SNDRV_PCM_FORMAT_S24_LE)
+                dest = (u32 *) (urb->buffer);
+        else {
+                snd_printk(KERN_ERR PREFIX "Unknown sample format.");
+                return;
+        }
+
         for (i = 0; i < PCM_N_PACKETS_PER_URB; i++) {
                 /* at least 4 header bytes for valid packet.
                  * after that: 32 bits per sample for analog channels */