Add OMAP audio driver

Adds OMAP audio driver.
Signed-off-by: Tony Lindgren <tony@atomide.com>

sound/oss/Kconfig

@@ -4,6 +4,33 @@
 # More hacking for modularisation.
 #
 # Prompt user for primary drivers.
+config SOUND_OMAP
+	tristate "OMAP Sound Driver"
+	depends on SOUND_PRIME!=n && SOUND && ARCH_OMAP
+	---help---
+	  OMAP Audio driver
+
+config SOUND_OMAP_TSC2101
+	tristate "TSC2101 Stereo Codec"
+	depends on SOUND_OMAP && ( MACH_OMAP_H2 || MACH_OMAP_H3 )
+	select OMAP_TSC2101
+	select OMAP_UWIRE if ARCH_OMAP
+	---help---
+	  Tsc2101 Audio Codec Driver for OMAP will be enabled.
+	  Will also Enable the following:
+	  1. uWire Driver based on Platform
+	  2. TSC2101 Glue driver
+
+config SOUND_OMAP_AIC23
+	tristate "AIC23 Stereo Codec"
+	depends on SOUND_OMAP && ( MACH_OMAP_INNOVATOR || MACH_OMAP_OSK )
+	select OMAP_DSP if ARCH_OMAP
+	select SENSORS_TLV320AIC23 if ARCH_OMAP
+	---help---
+	  AIC23 Audio Codec Driver for OMAP will be enabled.
+	  This will also enable OMAP DSP support because McBSP needed for
+	  this is a DSP peripheral. Additionally, AIC23 I2C support is enabled.
+
 config SOUND_BT878
 	tristate "BT878 audio dma"
 	depends on SOUND_PRIME!=n && SOUND

sound/oss/Makefile

@@ -8,6 +8,10 @@
 obj-$(CONFIG_SOUND_OSS)		+= sound.o
 obj-$(CONFIG_SOUND_CS4232)	+= cs4232.o ad1848.o 
 
+obj-$(CONFIG_SOUND_OMAP)        += omap-audio-dma-intfc.o omap-audio.o
+obj-$(CONFIG_SOUND_OMAP_TSC2101)+= omap-audio-tsc2101.o
+obj-$(CONFIG_SOUND_OMAP_AIC23)  += omap-audio-aic23.o
+
 # Please leave it as is, cause the link order is significant !
 
 obj-$(CONFIG_SOUND_SH_DAC_AUDIO)	+= sh_dac_audio.o

sound/oss/omap-audio-dma-intfc.h

+/*  
+ * linux/sound/oss/omap-audio-dma-intfc.h
+ *
+ * Common audio DMA handling for the OMAP processors
+ *
+ * Copyright (C) 2004 Texas Instruments, Inc.
+ *
+ * Copyright (C) 2000, 2001 Nicolas Pitre <nico@cam.org>
+ *
+ * This package 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.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * History:
+ *
+ * 2004/08/12  Nishanth Menon - Modified to integrate Audio requirements on 1610,1710 platforms
+ */
+
+#ifndef __OMAP_AUDIO_DMA_INTFC_H
+#define __OMAP_AUDIO_DMA_INTFC_H
+
+/************************** INCLUDES *************************************/
+
+/* Requires omap-audio.h */
+#include "omap-audio.h"
+
+/************************** GLOBAL MACROS *************************************/
+
+/* Provide the Macro interfaces common across platforms */
+#define DMA_REQUEST(e,s, cb)	{e=omap_request_sound_dma(s->dma_dev, s->id, s, &s->lch);}
+#define DMA_FREE(s)		omap_free_sound_dma(s, &s->lch)
+#define DMA_CLEAR(s)		omap_clear_sound_dma(s)
+
+/************************** GLOBAL DATA STRUCTURES *********************************/
+
+typedef void (*dma_callback_t) (int lch, u16 ch_status, void *data);
+
+/************************** GLOBAL FUNCTIONS ***************************************/
+
+dma_callback_t audio_get_dma_callback(void);
+int audio_setup_buf(audio_stream_t * s);
+int audio_process_dma(audio_stream_t * s);
+void audio_prime_rx(audio_state_t * state);
+int audio_set_fragments(audio_stream_t * s, int val);
+int audio_sync(struct file *file);
+void audio_stop_dma(audio_stream_t * s);
+u_int audio_get_dma_pos(audio_stream_t * s);
+void audio_reset(audio_stream_t * s);
+void audio_discard_buf(audio_stream_t * s);
+
+/**************** ARCH SPECIFIC FUNCIONS *******************************************/
+
+void omap_clear_sound_dma(audio_stream_t * s);
+
+int omap_request_sound_dma(int device_id, const char *device_name, void *data,
+			   int **channels);
+int omap_free_sound_dma(void *data, int **channels);
+
+#endif				/* #ifndef __OMAP_AUDIO_DMA_INTFC_H */

sound/oss/omap-audio.h

+/*
+ * linux/sound/oss/omap-audio.h
+ *
+ * Common audio handling for the OMAP processors
+ *
+ * Copyright (C) 2004 Texas Instruments, Inc.
+ *
+ * Copyright (C) 2000, 2001 Nicolas Pitre <nico@cam.org>
+ *
+ * This package 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.
+ *
+ * THIS PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ *  History
+ *  -------
+ *  2004/08/12 Nishanth Menon - Modified to integrate Audio requirements on 1610,1710 platforms
+ *
+ *  2004/04/04 Nishanth menon - Added hooks for power management
+ */
+
+#ifndef __OMAP_AUDIO_H
+#define __OMAP_AUDIO_H
+
+/* Requires dma.h */
+#include <asm/arch/dma.h>
+
+/*
+ * Buffer Management
+ */
+typedef struct {
+	int offset;		/* current offset */
+	char *data;		/* points to actual buffer */
+	dma_addr_t dma_addr;	/* physical buffer address */
+	int dma_ref;		/* DMA refcount */
+	int master;		/* owner for buffer allocation, contain size when true */
+} audio_buf_t;
+
+/*
+ * Structure describing the data stream related information
+ */
+typedef struct {
+	char *id;		/* identification string */
+	audio_buf_t *buffers;	/* pointer to audio buffer structures */
+	u_int usr_head;		/* user fragment index */
+	u_int dma_head;		/* DMA fragment index to go */
+	u_int dma_tail;		/* DMA fragment index to complete */
+	u_int fragsize;		/* fragment i.e. buffer size */
+	u_int nbfrags;		/* nbr of fragments i.e. buffers */
+	u_int pending_frags;	/* Fragments sent to DMA */
+	int dma_dev;		/* device identifier for DMA */
+
+#ifdef OMAP_DMA_CHAINING_SUPPORT
+	lch_chain *dma_chain;
+	dma_regs_t *dma_regs;	/* points to our DMA registers */
+#else
+	char started;		/* to store if the chain was started or not */
+	int dma_q_head;		/* DMA Channel Q Head */
+	int dma_q_tail;		/* DMA Channel Q Tail */
+	char dma_q_count;	/* DMA Channel Q Count */
+	char in_use;		/*  Is this is use? */
+	int *lch;		/*  Chain of channels this stream is linked to */
+#endif
+	int input_or_output;	/* Direction of this data stream */
+	int bytecount;		/* nbr of processed bytes */
+	int fragcount;		/* nbr of fragment transitions */
+	struct semaphore sem;	/* account for fragment usage */
+	wait_queue_head_t wq;	/* for poll */
+	int dma_spinref;	/* DMA is spinning */
+	unsigned mapped:1;	/* mmap()'ed buffers */
+	unsigned active:1;	/* actually in progress */
+	unsigned stopped:1;	/* might be active but stopped */
+	unsigned spin_idle:1;	/* have DMA spin on zeros when idle */
+	unsigned linked:1;	/* dma channels linked */
+} audio_stream_t;
+
+/*
+ * State structure for one instance
+ */
+typedef struct {
+	struct module *owner;   /* Codec module ID */
+	audio_stream_t *output_stream;
+	audio_stream_t *input_stream;
+	unsigned rd_ref:1;	/* open reference for recording */
+	unsigned wr_ref:1;	/* open reference for playback */
+	unsigned need_tx_for_rx:1; /* if data must be sent while receiving */
+	void *data;
+	void (*hw_init) (void *);
+	void (*hw_shutdown) (void *);
+	int (*client_ioctl) (struct inode *, struct file *, uint, ulong);
+	int (*hw_probe) (void);
+	void (*hw_remove) (void);
+	void (*hw_cleanup) (void);
+	int (*hw_suspend) (void);
+	int (*hw_resume) (void);
+	struct pm_dev *pm_dev;
+	struct semaphore sem;	/* to protect against races in attach() */
+} audio_state_t;
+
+#ifdef AUDIO_PM
+void audio_ldm_suspend(void *data);
+
+void audio_ldm_resume(void *data);
+
+#endif
+
+/* Register a Codec using this function */
+extern int audio_register_codec(audio_state_t * codec_state);
+/* Un-Register a Codec using this function */
+extern int audio_unregister_codec(audio_state_t * codec_state);
+/* Function to provide fops of omap audio driver */
+extern struct file_operations *audio_get_fops(void);
+/* Function to initialize the device info for audio driver */
+extern int audio_dev_init(void);
+/* Function to un-initialize the device info for audio driver */
+void audio_dev_uninit(void);
+
+#endif				/* End of #ifndef __OMAP_AUDIO_H */