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pxa2xx-lib.h
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pxa2xx-lib.h
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#ifndef PXA2XX_LIB_H
#define PXA2XX_LIB_H
#include <linux/platform_device.h>
#include <sound/ac97_codec.h>
/* PCM */
struct pxa2xx_pcm_dma_params {
char *name; /* stream identifier */
u32 dcmd; /* DMA descriptor dcmd field */
volatile u32 *drcmr; /* the DMA request channel to use */
u32 dev_addr; /* device physical address for DMA */
};
extern int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params);
extern int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream);
extern int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd);
extern snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream);
extern int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream);
extern void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id);
extern int __pxa2xx_pcm_open(struct snd_pcm_substream *substream);
extern int __pxa2xx_pcm_close(struct snd_pcm_substream *substream);
extern int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma);
extern int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream);
extern void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm);
/* AC97 */
extern unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg);
extern void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val);
extern bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97);
extern bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97);
extern void pxa2xx_ac97_finish_reset(struct snd_ac97 *ac97);
extern int pxa2xx_ac97_hw_suspend(void);
extern int pxa2xx_ac97_hw_resume(void);
extern int pxa2xx_ac97_hw_probe(struct platform_device *dev);
extern void pxa2xx_ac97_hw_remove(struct platform_device *dev);
/* AC97 platform_data */
/**
* struct pxa2xx_ac97_platform_data - pxa ac97 platform data
* @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95)
* a -1 value means no gpio will be used for reset
*
* Platform data should only be specified for pxa27x CPUs where a silicon bug
* prevents correct operation of the reset line. If not specified, the default
* behaviour is to consider gpio 113 as the AC97 reset line, which is the
* default on most boards.
*/
struct pxa2xx_ac97_platform_data {
int reset_gpio;
};
#endif