[ALSA] Support multiple capture rates on p16v.

EMU10K1/EMU10K2 driver
The capture rate does in fact vary, but it only captures anything if
the HD Capture source is set to I2S or AC97. I have not tested if the sound
is actually captured from an physical input of some type or not.
TODO: Get SPDIF capture working.

Signed-off-by: James Courtier-Dutton <James@superbug.co.uk>

diff --git a/sound/pci/emu10k1/p16v.c b/sound/pci/emu10k1/p16v.c
index 776761f..13f7e62 100644 (file)
--- a/sound/pci/emu10k1/p16v.c
+++ b/sound/pci/emu10k1/p16v.c
@@ -133,25 +133,24 @@ static snd_pcm_hardware_t snd_p16v_playback_hw = {
 };
 
 static snd_pcm_hardware_t snd_p16v_capture_hw = {
-       .info =                 (SNDRV_PCM_INFO_MMAP |
-                                SNDRV_PCM_INFO_INTERLEAVED |
-                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
-                                SNDRV_PCM_INFO_MMAP_VALID),
-       .formats =              SNDRV_PCM_FMTBIT_S32_LE,
-       .rates =                SNDRV_PCM_RATE_48000,
-       .rate_min =             48000,
-       .rate_max =             48000,
-       .channels_min =         2,
-       .channels_max =         2,
-       .buffer_bytes_max =     (32*1024),
-       .period_bytes_min =     64,
-       .period_bytes_max =     (16*1024),
-       .periods_min =          2,
-       .periods_max =          2,
-       .fifo_size =            0,
+       .info =                 (SNDRV_PCM_INFO_MMAP |
+                                SNDRV_PCM_INFO_INTERLEAVED |
+                                SNDRV_PCM_INFO_BLOCK_TRANSFER |
+                                SNDRV_PCM_INFO_MMAP_VALID),
+       .formats =              SNDRV_PCM_FMTBIT_S32_LE,
+       .rates =                SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
+       .rate_min =             44100,
+       .rate_max =             192000,
+       .channels_min =         2,
+       .channels_max =         2,
+       .buffer_bytes_max =     (32*1024),
+       .period_bytes_min =     64,
+       .period_bytes_max =     (16*1024),
+       .periods_min =          2,
+       .periods_max =          2,
+       .fifo_size =            0,
 };
 
-
 static void snd_p16v_pcm_free_substream(snd_pcm_runtime_t *runtime)
 {
        emu10k1_pcm_t *epcm = runtime->private_data;
@@ -362,7 +361,25 @@ static int snd_p16v_pcm_prepare_capture(snd_pcm_substream_t *substream)
        emu10k1_t *emu = snd_pcm_substream_chip(substream);
        snd_pcm_runtime_t *runtime = substream->runtime;
        int channel = substream->pcm->device - emu->p16v_device_offset;
-       //printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
+       u32 tmp;
+       //printk("prepare capture:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
+       tmp = snd_emu10k1_ptr_read(emu, A_SPDIF_SAMPLERATE, channel);
+        switch (runtime->rate) {
+       case 44100:
+         snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0800);
+         break;
+       case 96000:
+         snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0400);
+         break;
+       case 192000:
+         snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0200);
+         break;
+       case 48000:
+       default:
+         snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0000);
+         break;
+       }
+       /* FIXME: Check emu->buffer.size before actually writing to it. */
        snd_emu10k1_ptr20_write(emu, 0x13, channel, 0);
        snd_emu10k1_ptr20_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
        snd_emu10k1_ptr20_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes