1 #ifndef PXA2XX_LIB_H 2 #define PXA2XX_LIB_H 3 4 #include <linux/platform_device.h> 5 #include <sound/ac97_codec.h> 6 7 /* PCM */ 8 9 struct pxa2xx_pcm_dma_params { 10 char *name; /* stream identifier */ 11 u32 dcmd; /* DMA descriptor dcmd field */ 12 volatile u32 *drcmr; /* the DMA request channel to use */ 13 u32 dev_addr; /* device physical address for DMA */ 14 }; 15 16 extern int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream, 17 struct snd_pcm_hw_params *params); 18 extern int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream); 19 extern int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd); 20 extern snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream); 21 extern int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream); 22 extern void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id); 23 extern int __pxa2xx_pcm_open(struct snd_pcm_substream *substream); 24 extern int __pxa2xx_pcm_close(struct snd_pcm_substream *substream); 25 extern int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream, 26 struct vm_area_struct *vma); 27 extern int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream); 28 extern void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm); 29 30 /* AC97 */ 31 32 extern unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg); 33 extern void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val); 34 35 extern bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97); 36 extern bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97); 37 extern void pxa2xx_ac97_finish_reset(struct snd_ac97 *ac97); 38 39 extern int pxa2xx_ac97_hw_suspend(void); 40 extern int pxa2xx_ac97_hw_resume(void); 41 42 extern int pxa2xx_ac97_hw_probe(struct platform_device *dev); 43 extern void pxa2xx_ac97_hw_remove(struct platform_device *dev); 44 45 /* AC97 platform_data */ 46 /** 47 * struct pxa2xx_ac97_platform_data - pxa ac97 platform data 48 * @reset_gpio: AC97 reset gpio (normally gpio113 or gpio95) 49 * a -1 value means no gpio will be used for reset 50 * 51 * Platform data should only be specified for pxa27x CPUs where a silicon bug 52 * prevents correct operation of the reset line. If not specified, the default 53 * behaviour is to consider gpio 113 as the AC97 reset line, which is the 54 * default on most boards. 55 */ 56 struct pxa2xx_ac97_platform_data { 57 int reset_gpio; 58 }; 59 60 #endif 61