From 9f0ac6e1a8677ac509821f4ff0c77d39b1d63125 Mon Sep 17 00:00:00 2001 From: Frank Mandarino Date: Fri, 24 Nov 2006 15:49:39 +0100 Subject: [ALSA] Update AT91 ASoC driver for 2.6.19 kernel. Changes were required to support latest AT91 header files. Also updated to remove AT91RM9200-specific code in the ASoC platform drivers to support the AT91SAM9260 and AT91SAM9261 chips, but no testing was performed on these chips. Signed-off-by: Frank Mandarino Signed-off-by: Liam Girdwood Signed-off-by: Takashi Iwai Signed-off-by: Jaroslav Kysela --- sound/soc/at91/at91-pcm.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 sound/soc/at91/at91-pcm.h (limited to 'sound/soc/at91/at91-pcm.h') 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 @@ +/* + * at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC + * + * Author: Frank Mandarino + * 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. + */ + +#include + +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_cpu_dai at91_i2s_dai[3]; +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)) -- cgit v1.2.3-70-g09d2