26ade896b6
As the PXA27x series allow 2 gpios to reset the ac97 bus, allow through platform data configuration the definition of the correct gpio which will reset the AC97 bus. This comes from a silicon defect on the PXA27x series, where the gpio must be manually controlled in warm reset cases. Signed-off-by: Robert Jarzmik <rjarzmik@free.fr> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
60 lines
2.3 KiB
C
60 lines
2.3 KiB
C
#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
|