tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
9struct 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
16extern int __pxa2xx_pcm_hw_params(struct snd_pcm_substream *substream,
17 struct snd_pcm_hw_params *params);
18extern int __pxa2xx_pcm_hw_free(struct snd_pcm_substream *substream);
19extern int pxa2xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd);
20extern snd_pcm_uframes_t pxa2xx_pcm_pointer(struct snd_pcm_substream *substream);
21extern int __pxa2xx_pcm_prepare(struct snd_pcm_substream *substream);
22extern void pxa2xx_pcm_dma_irq(int dma_ch, void *dev_id);
23extern int __pxa2xx_pcm_open(struct snd_pcm_substream *substream);
24extern int __pxa2xx_pcm_close(struct snd_pcm_substream *substream);
25extern int pxa2xx_pcm_mmap(struct snd_pcm_substream *substream,
26 struct vm_area_struct *vma);
27extern int pxa2xx_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream);
28extern void pxa2xx_pcm_free_dma_buffers(struct snd_pcm *pcm);
29
30/* AC97 */
31
32extern unsigned short pxa2xx_ac97_read(struct snd_ac97 *ac97, unsigned short reg);
33extern void pxa2xx_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val);
34
35extern bool pxa2xx_ac97_try_warm_reset(struct snd_ac97 *ac97);
36extern bool pxa2xx_ac97_try_cold_reset(struct snd_ac97 *ac97);
37extern void pxa2xx_ac97_finish_reset(struct snd_ac97 *ac97);
38
39extern int pxa2xx_ac97_hw_suspend(void);
40extern int pxa2xx_ac97_hw_resume(void);
41
42extern int pxa2xx_ac97_hw_probe(struct platform_device *dev);
43extern 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 */
56struct pxa2xx_ac97_platform_data {
57 int reset_gpio;
58};
59
60#endif