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[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>
This commit is contained in:
Takashi Iwai 2005-08-03 14:02:47 +02:00 коммит произвёл Jaroslav Kysela
Родитель 5549d54992
Коммит 5b8f7f7329
3 изменённых файлов: 16 добавлений и 4 удалений
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1
include/sound/ad1816a.h
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@ -138,6 +138,7 @@ struct _snd_ad1816a {
spinlock_t lock;
unsigned short mode;
unsigned int clock_freq;
snd_card_t *card;
snd_pcm_t *pcm;

5
sound/isa/ad1816a/ad1816a.c
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@ -53,6 +53,7 @@ static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* Pnp setup */
static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ; /* Pnp setup */
static int dma1[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* PnP setup */
static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA; /* PnP setup */
static int clockfreq[SNDRV_CARDS];
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for ad1816a based soundcard.");
@ -74,6 +75,8 @@ module_param_array(dma1, int, NULL, 0444);
MODULE_PARM_DESC(dma1, "1st DMA # for ad1816a driver.");
module_param_array(dma2, int, NULL, 0444);
MODULE_PARM_DESC(dma2, "2nd DMA # for ad1816a driver.");
module_param_array(clockfreq, int, NULL, 0444);
MODULE_PARM_DESC(clockfreq, "Clock frequency for ad1816a driver (default = 0).");
struct snd_card_ad1816a {
struct pnp_dev *dev;
@ -209,6 +212,8 @@ static int __devinit snd_card_ad1816a_probe(int dev, struct pnp_card_link *pcard
snd_card_free(card);
return error;
}
if (clockfreq[dev] >= 5000 && clockfreq[dev] <= 100000)
chip->clock_freq = clockfreq[dev];
strcpy(card->driver, "AD1816A");
strcpy(card->shortname, "ADI SoundPort AD1816A");

14
sound/isa/ad1816a/ad1816a_lib.c
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@ -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,