git://bbs.cooldavid.org / net-next-2.6.git / blame
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| ff9abf5b | 1 | /* |
| 9f0ac6e1 | 2 | * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC |
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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 | ||
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19 | #ifndef _AT91_PCM_H |
| 20 | #define _AT91_PCM_H | |
| 21 | ||
| a09e64fb | 22 | #include <mach/hardware.h> |
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23 | |
| 24 | struct at91_ssc_periph { | |
| 25 | void __iomem *base; | |
| 26 | u32 pid; | |
| 27 | }; | |
| 28 | ||
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29 | /* |
| 30 | * Registers and status bits that are required by the PCM driver. | |
| 31 | */ | |
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32 | struct at91_pdc_regs { |
| 33 | unsigned int xpr; /* PDC recv/trans pointer */ | |
| 34 | unsigned int xcr; /* PDC recv/trans counter */ | |
| 35 | unsigned int xnpr; /* PDC next recv/trans pointer */ | |
| 36 | unsigned int xncr; /* PDC next recv/trans counter */ | |
| 37 | unsigned int ptcr; /* PDC transfer control */ | |
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38 | }; |
| 39 | ||
| 9f0ac6e1 | 40 | struct at91_ssc_mask { |
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41 | u32 ssc_enable; /* SSC recv/trans enable */ |
| 42 | u32 ssc_disable; /* SSC recv/trans disable */ | |
| 43 | u32 ssc_endx; /* SSC ENDTX or ENDRX */ | |
| 44 | u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ | |
| 45 | u32 pdc_enable; /* PDC recv/trans enable */ | |
| 46 | u32 pdc_disable; /* PDC recv/trans disable */ | |
| 47 | }; | |
| 48 | ||
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49 | /* |
| 50 | * This structure, shared between the PCM driver and the interface, | |
| 51 | * contains all information required by the PCM driver to perform the | |
| 52 | * PDC DMA operation. All fields except dma_intr_handler() are initialized | |
| 53 | * by the interface. The dms_intr_handler() pointer is set by the PCM | |
| 54 | * driver and called by the interface SSC interrupt handler if it is | |
| 55 | * non-NULL. | |
| 56 | */ | |
| 9f0ac6e1 | 57 | struct at91_pcm_dma_params { |
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58 | char *name; /* stream identifier */ |
| 59 | int pdc_xfer_size; /* PDC counter increment in bytes */ | |
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60 | void __iomem *ssc_base; /* SSC base address */ |
| 61 | struct at91_pdc_regs *pdc; /* PDC receive or transmit registers */ | |
| 62 | struct at91_ssc_mask *mask;/* SSC & PDC status bits */ | |
| 63 | struct snd_pcm_substream *substream; | |
| 64 | void (*dma_intr_handler)(u32, struct snd_pcm_substream *); | |
| 65 | }; | |
| ff9abf5b | 66 | |
| 9f0ac6e1 | 67 | extern struct snd_soc_platform at91_soc_platform; |
| ff9abf5b | 68 | |
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69 | #define at91_ssc_read(a) ((unsigned long) __raw_readl(a)) |
| 70 | #define at91_ssc_write(a,v) __raw_writel((v),(a)) | |
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71 | |
| 72 | #endif /* _AT91_PCM_H */ |