[ALSA] ad1816a - Add clockfreq module option

Documentation,AD1816A driver
Added clockfreq module option for the card with a different clock frequency
than 33kHz.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 10 insertions, 4 deletions

diff --git a/sound/isa/ad1816a/ad1816a_lib.c b/sound/isa/ad1816a/ad1816a_lib.c
index 625b2eff14a1..ae860360ecf9 100644
--- a/sound/isa/ad1816a/ad1816a_lib.c
+++ b/sound/isa/ad1816a/ad1816a_lib.c
@@ -234,7 +234,7 @@ static int snd_ad1816a_playback_prepare(snd_pcm_substream_t *substream)
         ad1816a_t *chip = snd_pcm_substream_chip(substream);
         unsigned long flags;
         snd_pcm_runtime_t *runtime = substream->runtime;
-        unsigned int size;
+        unsigned int size, rate;
 
         spin_lock_irqsave(&chip->lock, flags);
 
@@ -245,7 +245,10 @@ static int snd_ad1816a_playback_prepare(snd_pcm_substream_t *substream)
         snd_dma_program(chip->dma1, runtime->dma_addr, size,
                         DMA_MODE_WRITE | DMA_AUTOINIT);
 
-        snd_ad1816a_write(chip, AD1816A_PLAYBACK_SAMPLE_RATE, runtime->rate);
+        rate = runtime->rate;
+        if (chip->clock_freq)
+                rate = (rate * 33000) / chip->clock_freq;
+        snd_ad1816a_write(chip, AD1816A_PLAYBACK_SAMPLE_RATE, rate);
         snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
                 AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
                 snd_ad1816a_get_format(chip, runtime->format,
@@ -263,7 +266,7 @@ static int snd_ad1816a_capture_prepare(snd_pcm_substream_t *substream)
         ad1816a_t *chip = snd_pcm_substream_chip(substream);
         unsigned long flags;
         snd_pcm_runtime_t *runtime = substream->runtime;
-        unsigned int size;
+        unsigned int size, rate;
 
         spin_lock_irqsave(&chip->lock, flags);
 
@@ -274,7 +277,10 @@ static int snd_ad1816a_capture_prepare(snd_pcm_substream_t *substream)
         snd_dma_program(chip->dma2, runtime->dma_addr, size,
                         DMA_MODE_READ | DMA_AUTOINIT);
 
-        snd_ad1816a_write(chip, AD1816A_CAPTURE_SAMPLE_RATE, runtime->rate);
+        rate = runtime->rate;
+        if (chip->clock_freq)
+                rate = (rate * 33000) / chip->clock_freq;
+        snd_ad1816a_write(chip, AD1816A_CAPTURE_SAMPLE_RATE, rate);
         snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
                 AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
                 snd_ad1816a_get_format(chip, runtime->format,