diff options
author | Kumar Gala <galak@kernel.crashing.org> | 2007-02-12 23:57:21 -0600 |
---|---|---|
committer | Kumar Gala <galak@kernel.crashing.org> | 2007-02-12 23:57:21 -0600 |
commit | 54c66f6d781e03dc0b23956234963c4911e6d1c0 (patch) | |
tree | 40619a66ae6d8703a57bf681d087ffeabbffd346 /sound/soc/at91/at91-pcm.h | |
parent | 8ce0a7df6e6117d8814e976d4b7ce6a6b2c9cf93 (diff) | |
parent | 17e0e27020d028a790d97699aff85a43af5be472 (diff) |
Merge branch 'master' into 85xx
Diffstat (limited to 'sound/soc/at91/at91-pcm.h')
-rw-r--r-- | sound/soc/at91/at91-pcm.h | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sound/soc/at91/at91-pcm.h b/sound/soc/at91/at91-pcm.h new file mode 100644 index 00000000000..58d0f00a07b --- /dev/null +++ b/sound/soc/at91/at91-pcm.h @@ -0,0 +1,72 @@ +/* + * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC + * + * Author: Frank Mandarino <fmandarino@endrelia.com> + * Endrelia Technologies Inc. + * Created: Mar 3, 2006 + * + * Based on pxa2xx-pcm.h by: + * + * Author: Nicolas Pitre + * Created: Nov 30, 2004 + * Copyright: MontaVista Software, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef _AT91_PCM_H +#define _AT91_PCM_H + +#include <asm/arch/hardware.h> + +struct at91_ssc_periph { + void __iomem *base; + u32 pid; +}; + +/* + * Registers and status bits that are required by the PCM driver. + */ +struct at91_pdc_regs { + unsigned int xpr; /* PDC recv/trans pointer */ + unsigned int xcr; /* PDC recv/trans counter */ + unsigned int xnpr; /* PDC next recv/trans pointer */ + unsigned int xncr; /* PDC next recv/trans counter */ + unsigned int ptcr; /* PDC transfer control */ +}; + +struct at91_ssc_mask { + u32 ssc_enable; /* SSC recv/trans enable */ + u32 ssc_disable; /* SSC recv/trans disable */ + u32 ssc_endx; /* SSC ENDTX or ENDRX */ + u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */ + u32 pdc_enable; /* PDC recv/trans enable */ + u32 pdc_disable; /* PDC recv/trans disable */ +}; + +/* + * This structure, shared between the PCM driver and the interface, + * contains all information required by the PCM driver to perform the + * PDC DMA operation. All fields except dma_intr_handler() are initialized + * by the interface. The dms_intr_handler() pointer is set by the PCM + * driver and called by the interface SSC interrupt handler if it is + * non-NULL. + */ +struct at91_pcm_dma_params { + char *name; /* stream identifier */ + int pdc_xfer_size; /* PDC counter increment in bytes */ + void __iomem *ssc_base; /* SSC base address */ + struct at91_pdc_regs *pdc; /* PDC receive or transmit registers */ + struct at91_ssc_mask *mask;/* SSC & PDC status bits */ + struct snd_pcm_substream *substream; + void (*dma_intr_handler)(u32, struct snd_pcm_substream *); +}; + +extern struct snd_soc_platform at91_soc_platform; + +#define at91_ssc_read(a) ((unsigned long) __raw_readl(a)) +#define at91_ssc_write(a,v) __raw_writel((v),(a)) + +#endif /* _AT91_PCM_H */ |