forked from Minki/linux
9aaca9683b
Attached is a revised version of my patch to add AT32 to ASoC. This cleans most of the style issues associated with the previous patch. Also fixes an issue with the playpaq_wm8510.c code depending on a non-released patch to th AT32 portmux support. Patch is against 2.6.24.3.atmel.3 kernel, the latest AVR32 kernel Atmel has released, with the linux-2.6-asoc patches from when v2.6.24 was tagged also applied. [Fixed up minor checkpatch issues and updated for current kernels -- broonie] Signed-off-by: Geoffrey Wossum <gwossum@acm.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
/* sound/soc/at32/at32-pcm.h
|
|
* ASoC PCM interface for Atmel AT32 SoC
|
|
*
|
|
* Copyright (C) 2008 Long Range Systems
|
|
* Geoffrey Wossum <gwossum@acm.org>
|
|
*
|
|
* 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 __SOUND_SOC_AT32_AT32_PCM_H
|
|
#define __SOUND_SOC_AT32_AT32_PCM_H __FILE__
|
|
|
|
#include <linux/atmel-ssc.h>
|
|
|
|
|
|
/*
|
|
* Registers and status bits that are required by the PCM driver
|
|
* TODO: Is ptcr really used?
|
|
*/
|
|
struct at32_pdc_regs {
|
|
u32 xpr; /* PDC RX/TX pointer */
|
|
u32 xcr; /* PDC RX/TX counter */
|
|
u32 xnpr; /* PDC next RX/TX pointer */
|
|
u32 xncr; /* PDC next RX/TX counter */
|
|
u32 ptcr; /* PDC transfer control */
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
* SSC mask info
|
|
*/
|
|
struct at32_ssc_mask {
|
|
u32 ssc_enable; /* SSC RX/TX enable */
|
|
u32 ssc_disable; /* SSC RX/TX disable */
|
|
u32 ssc_endx; /* SSC ENDTX or ENDRX */
|
|
u32 ssc_endbuf; /* SSC TXBUFF or RXBUFF */
|
|
u32 pdc_enable; /* PDC RX/TX enable */
|
|
u32 pdc_disable; /* PDC RX/TX 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 at32_pcm_dma_params {
|
|
char *name; /* stream identifier */
|
|
int pdc_xfer_size; /* PDC counter increment in bytes */
|
|
struct ssc_device *ssc; /* SSC device for stream */
|
|
struct at32_pdc_regs *pdc; /* PDC register info */
|
|
struct at32_ssc_mask *mask; /* SSC mask info */
|
|
struct snd_pcm_substream *substream;
|
|
void (*dma_intr_handler) (u32, struct snd_pcm_substream *);
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
* The AT32 ASoC platform driver
|
|
*/
|
|
extern struct snd_soc_platform at32_soc_platform;
|
|
|
|
|
|
|
|
/*
|
|
* SSC register access (since ssc_writel() / ssc_readl() require literal name)
|
|
*/
|
|
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
|
|
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
|
|
|
|
#endif /* __SOUND_SOC_AT32_AT32_PCM_H */
|