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Diffstat (limited to 'sound/soc/at91/at91-pcm.h')
-rw-r--r-- | sound/soc/at91/at91-pcm.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sound/soc/at91/at91-pcm.h b/sound/soc/at91/at91-pcm.h new file mode 100644 index 000000000000..6c3b095725c8 --- /dev/null +++ b/sound/soc/at91/at91-pcm.h | |||
@@ -0,0 +1,71 @@ | |||
1 | /* | ||
2 | * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC | ||
3 | * | ||
4 | * Author: Frank Mandarino <fmandarino@endrelia.com> | ||
5 | * Endrelia Technologies Inc. | ||
6 | * Created: Mar 3, 2006 | ||
7 | * | ||
8 | * Based on pxa2xx-pcm.h by: | ||
9 | * | ||
10 | * Author: Nicolas Pitre | ||
11 | * Created: Nov 30, 2004 | ||
12 | * Copyright: MontaVista Software, Inc. | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or modify | ||
15 | * it under the terms of the GNU General Public License version 2 as | ||
16 | * published by the Free Software Foundation. | ||
17 | */ | ||
18 | |||
19 | #include <asm/arch/hardware.h> | ||
20 | |||
21 | struct at91_ssc_periph { | ||
22 | void __iomem *base; | ||
23 | u32 pid; | ||
24 | }; | ||
25 | |||
26 | |||
27 | /* | ||
28 | * Registers and status bits that are required by the PCM driver. | ||
29 | */ | ||
30 | struct at91_pdc_regs { | ||
31 | unsigned int xpr; /* PDC recv/trans pointer */ | ||
32 | unsigned int xcr; /* PDC recv/trans counter */ | ||
33 | unsigned int xnpr; /* PDC next recv/trans pointer */ | ||
34 | unsigned int xncr; /* PDC next recv/trans counter */ | ||
35 | unsigned int ptcr; /* PDC transfer control */ | ||
36 | }; | ||
37 | |||
38 | struct at91_ssc_mask { | ||
39 | u32 ssc_enable; /* SSC recv/trans enable */ | ||
40 | u32 ssc_disable; /* SSC recv/trans disable */ | ||
41 | u32 ssc_endx; /* SSC ENDTX or ENDRX */ | ||
42 | u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ | ||
43 | u32 pdc_enable; /* PDC recv/trans enable */ | ||
44 | u32 pdc_disable; /* PDC recv/trans disable */ | ||
45 | }; | ||
46 | |||
47 | |||
48 | /* | ||
49 | * This structure, shared between the PCM driver and the interface, | ||
50 | * contains all information required by the PCM driver to perform the | ||
51 | * PDC DMA operation. All fields except dma_intr_handler() are initialized | ||
52 | * by the interface. The dms_intr_handler() pointer is set by the PCM | ||
53 | * driver and called by the interface SSC interrupt handler if it is | ||
54 | * non-NULL. | ||
55 | */ | ||
56 | struct at91_pcm_dma_params { | ||
57 | char *name; /* stream identifier */ | ||
58 | int pdc_xfer_size; /* PDC counter increment in bytes */ | ||
59 | void __iomem *ssc_base; /* SSC base address */ | ||
60 | struct at91_pdc_regs *pdc; /* PDC receive or transmit registers */ | ||
61 | struct at91_ssc_mask *mask;/* SSC & PDC status bits */ | ||
62 | struct snd_pcm_substream *substream; | ||
63 | void (*dma_intr_handler)(u32, struct snd_pcm_substream *); | ||
64 | }; | ||
65 | |||
66 | extern struct snd_soc_cpu_dai at91_i2s_dai[3]; | ||
67 | extern struct snd_soc_platform at91_soc_platform; | ||
68 | |||
69 | |||
70 | #define at91_ssc_read(a) ((unsigned long) __raw_readl(a)) | ||
71 | #define at91_ssc_write(a,v) __raw_writel((v),(a)) | ||