mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 04:11:49 +00:00
6c7425095c
The Ateml AT91 and AVR32 SoC share common IP for audio and can share the same driver code using the atmel-ssc API provided for both architectures. Do this, creating a new unified atmel ASoC architecture to replace the previous at32 and at91 ones. [This was contributed as a patch series for reviewability but has been squashed down to a single commit to help preserve both the history and bisectability. A small bugfix from Jukka is included.] Tested-by: Jukka Hynninen <ext-jukka.hynninen@vaisala.com> Signed-off-by: Sedji Gaouaou <sedji.gaouaou@atmel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/*
|
|
* at91-pcm.h - ALSA PCM interface for the Atmel AT91 SoC.
|
|
*
|
|
* Copyright (C) 2005 SAN People
|
|
* Copyright (C) 2008 Atmel
|
|
*
|
|
* Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
|
|
*
|
|
* Based on at91-pcm. by:
|
|
* Frank Mandarino <fmandarino@endrelia.com>
|
|
* Copyright 2006 Endrelia Technologies Inc.
|
|
*
|
|
* Based on pxa2xx-pcm.c by:
|
|
*
|
|
* Author: Nicolas Pitre
|
|
* Created: Nov 30, 2004
|
|
* Copyright: (C) 2004 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 as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _ATMEL_PCM_H
|
|
#define _ATMEL_PCM_H
|
|
|
|
#include <linux/atmel-ssc.h>
|
|
|
|
/*
|
|
* Registers and status bits that are required by the PCM driver.
|
|
*/
|
|
struct atmel_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 atmel_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 atmel_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 atmel_pdc_regs *pdc; /* PDC receive or transmit registers */
|
|
struct atmel_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 atmel_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 /* _ATMEL_PCM_H */
|