[PATCH] ARM: DaVinci: add audio support

drivers/i2c/chips/Kconfig

@@ -137,4 +137,12 @@ config SENSORS_MAX6875
 	  This driver can also be built as a module.  If so, the module
 	  will be called max6875.
 
+config SENSORS_TLV320AIC33
+	tristate "Texas Instruments TLV320AIC33 Codec"
+	depends on I2C && I2C_DAVINCI
+	select SENSORS_TLV320AIC23
+	help
+	  If you say yes here you get support for the I2C control
+	  interface for Texas Instruments TLV320AIC33 audio codec.
+
 endmenu

drivers/i2c/chips/tlv320aic23.c

@@ -96,6 +96,18 @@ int aic23_write_value(u8 reg, u16 value)
 	return 0;
 }
 
+#ifdef CONFIG_SENSORS_TLV320AIC33
+int tlv320aic33_write_value(u8 reg, u16 value)
+{
+	static struct i2c_client *client;
+	u8 val = value & 0xff;
+
+	client = new_client;
+
+	return i2c_smbus_write_byte_data(client, reg, val);
+}
+#endif /* CONFIG_SENSORS_TLV320AIC33 */
+
 static int aic23_detect_client(struct i2c_adapter *adapter, int address,
 				     int kind)
 {
@@ -163,6 +175,7 @@ static struct i2c_driver aic23_driver = {
 	.detach_client	= aic23_detach_client,
 };
 
+#ifdef CONFIG_ARCH_OMAP
 /*
  * Configures the McBSP3 which is used to send clock to the AIC23 codec.
  * The input clock rate from DSP is 12MHz.
@@ -194,6 +207,7 @@ static int omap_mcbsp3_aic23_clock_init(void)
 
 	return 0;
 }
+#endif
 
 static void update_volume_left(int volume)
 {
@@ -640,10 +654,12 @@ static int __init aic23_init(void)
 		selftest = -ENODEV;
 		return selftest;
 	}
+#ifdef CONFIG_ARCH_OMAP
 	/* FIXME: Do in board-specific file */
 	omap_mcbsp3_aic23_clock_init();
 	if (!aic23_info_l.power_down)
 		aic23_power_up();
+#endif
 	aic23_info_l.initialized = 1;
 	printk("TLV320AIC23 I2C version %s (%s)\n", 
 	       TLV320AIC23_VERSION, TLV320AIC23_DATE);

include/asm-arm/arch-davinci/aic23.h

+/*
+ * linux/include/asm-arm/arch-omap/aic23.h
+ *
+ * Hardware definitions for TI TLV320AIC23 audio codec
+ *
+ * Copyright (C) 2002 RidgeRun, Inc.
+ * Author: Steve Johnson
+ *
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __ASM_ARCH_AIC23_H
+#define __ASM_ARCH_AIC23_H
+
+// Codec TLV320AIC23
+#define LEFT_LINE_VOLUME_ADDR		0x00
+#define RIGHT_LINE_VOLUME_ADDR		0x01
+#define LEFT_CHANNEL_VOLUME_ADDR	0x02
+#define RIGHT_CHANNEL_VOLUME_ADDR	0x03
+#define ANALOG_AUDIO_CONTROL_ADDR	0x04
+#define DIGITAL_AUDIO_CONTROL_ADDR	0x05
+#define POWER_DOWN_CONTROL_ADDR		0x06
+#define DIGITAL_AUDIO_FORMAT_ADDR	0x07
+#define SAMPLE_RATE_CONTROL_ADDR	0x08
+#define DIGITAL_INTERFACE_ACT_ADDR	0x09
+#define RESET_CONTROL_ADDR		0x0F
+
+// Left (right) line input volume control register
+#define LRS_ENABLED			0x0100
+#define LIM_MUTED			0x0080
+#define LIV_DEFAULT			0x0017
+#define LIV_MAX				0x001f
+#define LIV_MIN				0x0000
+
+// Left (right) channel headphone volume control register
+#define LZC_ON				0x0080
+#define LHV_DEFAULT			0x0079
+#define LHV_MAX				0x007f
+#define LHV_MIN				0x0000
+
+// Analog audio path control register
+#define STA_REG(x)			((x)<<6)
+#define STE_ENABLED			0x0020
+#define DAC_SELECTED			0x0010
+#define BYPASS_ON			0x0008
+#define INSEL_MIC			0x0004
+#define MICM_MUTED			0x0002
+#define MICB_20DB			0x0001
+
+// Digital audio path control register
+#define DACM_MUTE			0x0008
+#define DEEMP_32K			0x0002
+#define DEEMP_44K			0x0004
+#define DEEMP_48K			0x0006
+#define ADCHP_ON			0x0001
+
+// Power control down register
+#define DEVICE_POWER_OFF	  	0x0080
+#define CLK_OFF				0x0040
+#define OSC_OFF				0x0020
+#define OUT_OFF				0x0010
+#define DAC_OFF				0x0008
+#define ADC_OFF				0x0004
+#define MIC_OFF				0x0002
+#define LINE_OFF			0x0001
+
+// Digital audio interface register
+#define MS_MASTER			0x0040
+#define LRSWAP_ON			0x0020
+#define LRP_ON				0x0010
+#define IWL_16				0x0000
+#define IWL_20				0x0004
+#define IWL_24				0x0008
+#define IWL_32				0x000C
+#define FOR_I2S				0x0002
+#define FOR_DSP				0x0003
+
+// Sample rate control register
+#define CLKOUT_HALF			0x0080
+#define CLKIN_HALF			0x0040
+#define BOSR_384fs			0x0002 // BOSR_272fs when in USB mode
+#define USB_CLK_ON			0x0001
+#define SR_MASK                         0xf
+#define CLKOUT_SHIFT                    7
+#define CLKIN_SHIFT                     6
+#define SR_SHIFT                        2
+#define BOSR_SHIFT                      1
+
+// Digital interface register
+#define ACT_ON				0x0001
+
+#define TLV320AIC23ID1                  (0x1a)	// cs low
+#define TLV320AIC23ID2                  (0x1b)	// cs high
+
+void tlv320aic23_power_up(void);
+void tlv320aic23_power_down(void);
+
+#endif /* __ASM_ARCH_AIC23_H */

include/sound/davincisound.h

+/*
+ * include/sound/davincisound.h
+ *
+ * Copyright (C) 2006 Texas Instruments, Inc.
+ *
+ * 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:
+ * --------
+ *  2006-03-29 Sudhakar - Created
+ */
+
+#include <linux/soundcard.h>
+
+#define SOUND_MIXER_MICBIAS		_IOC_NR(SOUND_MIXER_PRIVATE1)
+#define SOUND_MIXER_READ_MICBIAS	_SIOR ('M', SOUND_MIXER_MICBIAS, int)
+#define SOUND_MIXER_WRITE_MICBIAS	SOUND_MIXER_PRIVATE1

sound/oss/Kconfig

@@ -872,3 +872,36 @@ config SOUND_SH_DAC_AUDIO_CHANNEL
 	int "    DAC channel"
 	default "1"
 	depends on SOUND_SH_DAC_AUDIO
+
+config SOUND_DAVINCI
+	tristate "DaVinci Sound Driver"
+	depends on ARCH_DAVINCI && SOUND_PRIME!=n && SOUND
+	select DAVINCI_MCBSP
+	---help---
+	DaVinci Sound driver
+
+config SOUND_DAVINCI_AIC33
+       tristate "AIC33 Stereo Codec"
+       depends on SOUND_DAVINCI
+       select SENSORS_TLV320AIC33
+       ---help---
+         If you say yes here you get support for the I2C control
+         interface for Texas Instruments TLV320AIC33 audio codec.
+
+menu "DaVinci Audio Options"
+	depends on SOUND_DAVINCI
+
+choice
+	prompt "Mono/Stereo Jack Support"
+	default MONOSTEREO_SAMEJACK
+
+config MONOSTEREO_DIFFJACK
+	bool "Mono and Stereo on different jacks"
+
+config MONOSTEREO_SAMEJACK
+	bool "Mono and Stereo on same jacks"
+
+endchoice
+
+endmenu
+

sound/oss/Makefile

@@ -12,6 +12,9 @@ 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
 
+obj-$(CONFIG_SOUND_DAVINCI)	+= davinci-audio-dma-intfc.o davinci-audio.o
+obj-$(CONFIG_SOUND_DAVINCI_AIC33) += davinci-audio-aic33.o
+
 # Please leave it as is, cause the link order is significant !
 
 obj-$(CONFIG_SOUND_SH_DAC_AUDIO)	+= sh_dac_audio.o

sound/oss/davinci-aic33.h

+/*
+ * linux/sound/oss/davinci-aic33.h
+ *
+ * Glue driver for AIC33 for Davinci processors
+ *
+ * Copyright (C) 2006 Texas Instruments, Inc.
+ *
+ * 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:
+ *  -------
+ *  2005-10-18 Rishi Bhattacharya - Support for AIC33 codec and Davinci DM644x Processor
+ */
+
+#ifndef __ASM_ARCH_AIC33_H
+#define __ASM_ARCH_AIC33_H
+
+/* Codec TLV320AIC33 */
+#define REGISTER_ADDR0  0x00
+#define REGISTER_ADDR1          0x01
+#define REGISTER_ADDR2          0x02
+#define REGISTER_ADDR3          0x03
+#define REGISTER_ADDR4          0x04
+#define REGISTER_ADDR5          0x05
+#define REGISTER_ADDR6          0x06
+#define REGISTER_ADDR7          0x07
+#define REGISTER_ADDR8          0x08
+#define REGISTER_ADDR9          0x09
+#define REGISTER_ADDR10         0x0A
+#define REGISTER_ADDR11         0x0B
+#define REGISTER_ADDR12         0x0C
+#define REGISTER_ADDR15         0x0F
+#define REGISTER_ADDR16         0x10
+#define REGISTER_ADDR17         0x11
+#define REGISTER_ADDR18         0x12
+#define REGISTER_ADDR19         0x13
+#define REGISTER_ADDR20         0x14
+#define REGISTER_ADDR21         0x15
+#define REGISTER_ADDR22         0x16
+#define REGISTER_ADDR23         0x17
+#define REGISTER_ADDR24         0x18
+#define REGISTER_ADDR25         0x19
+#define REGISTER_ADDR26         0x1A
+#define REGISTER_ADDR27         0x1B
+#define REGISTER_ADDR28         0x1C
+#define REGISTER_ADDR29         0x1D
+#define REGISTER_ADDR30         0x1E
+#define REGISTER_ADDR31         0x1F
+#define REGISTER_ADDR32         0x20
+#define REGISTER_ADDR33         0x21
+#define REGISTER_ADDR37         0x25
+#define REGISTER_ADDR38         0x26
+#define REGISTER_ADDR40         0x28
+#define REGISTER_ADDR41         0x29
+#define REGISTER_ADDR43         0x2B
+#define REGISTER_ADDR44         0x2C
+#define REGISTER_ADDR45         0x2D
+#define REGISTER_ADDR46         0x2E
+#define REGISTER_ADDR47         0x2F
+#define REGISTER_ADDR51         0x33
+#define REGISTER_ADDR58         0x3A
+#define REGISTER_ADDR64         0x40
+#define REGISTER_ADDR65         0x41
+#define REGISTER_ADDR73         0x49
+#define REGISTER_ADDR74         0x4A
+#define REGISTER_ADDR75         0x4B
+#define REGISTER_ADDR76         0x4C
+#define REGISTER_ADDR77         0x4D
+#define REGISTER_ADDR78         0x4E
+#define REGISTER_ADDR79         0x4F
+#define REGISTER_ADDR80         0x50
+#define REGISTER_ADDR81         0x51
+#define REGISTER_ADDR82         0x52
+#define REGISTER_ADDR83         0x53
+#define REGISTER_ADDR84         0x54
+#define REGISTER_ADDR85         0x55
+#define REGISTER_ADDR86         0x56
+#define REGISTER_ADDR87         0x57
+#define REGISTER_ADDR88         0x58
+#define REGISTER_ADDR89         0x59
+#define REGISTER_ADDR90         0x5A
+#define REGISTER_ADDR91         0x5B
+#define REGISTER_ADDR92         0x5C
+#define REGISTER_ADDR93         0x5D
+#define REGISTER_ADDR94         0x5E
+
+// Page Select register 0
+#define PAGE_SELECT0            0
+#define PAGE_SELECT1            1
+
+// Software reset register 1
+#define SOFT_RESET              0x80
+
+// Codec sample rate select register 2
+#define ADC_FS_MAX              0xA0
+#define ADC_FS_MIN              0x00
+
+#define DAC_FS_MAX              0x0A
+#define DAC_FS_MIN              0x00
+
+// PLL Programming registerA 3
+#define PLL_ENABLE              0x80
+
+// Codec Datapath setup register 7
+#define FS_REF_44_1             0x80
+#define FS_REF_DEFAULT_48       0x00
+#define ADC_DUAL_RATE_MODE      0x40
+#define DAC_DUAL_RATE_MODE      0x20
+#define LDAC_LCHAN              0x08
+#define LDAC_RCHAN              0x10
+#define LDAC_MONO_MIX           0x18
+
+#define RDAC_RCHAN              0x02
+#define RDAC_LCHAN              0x04
+#define RDAC_MONO_MIX           0x06
+
+//Audio serial data interface control registerA 8
+#define BIT_CLK_MASTER          0x80
+#define WORD_CLK_MASTER         0x40
+#define DOUT_TRI_STATE          0x20
+#define CLK_TRANS_MASTER        0x10
+#define ENABLE_3D               0x04
+#define DM_ENABLE_128           0x01
+#define DM_ENABLE_64            0x02
+#define DM_ENABLE_32            0x03
+
+//Audio serial data interface control registerB 9
+#define DSP_MODE                0x40
+#define RJ_MODE                 0x80
+#define LJ_MODE                 0xC0
+#define WORD_LENGTH20           0x10
+#define WORD_LENGTH24           0x20
+#define WORD_LENGTH32           0x30
+#define BITCLOCK_256CLK_FRAME   0x08
+
+//Left/Right ADC PGA gain control register 15 & 16
+#define ADC_PGA_MUTE            0x80
+#define ADC_PGA_GAIN_MAX        0x78
+#define ADC_PGA_GAIN_MIN        0x00
+
+// MIC3L/R to left/right ADC control register 17 & 18
+#define ADCPGA_GAIN_MAX         0x00
+#define MIC3L_ADCPGA_GAIN_MIN   0x80
+#define MIC3L_ADCPGA_DISCONNECT 0xF0
+
+#define MIC3R_ADCPGA_GAIN_MIN   0x08
+#define MIC3R_ADCPGA_DISCONNECT 0x0F
+
+//LINE1L to left ADC Control Register 19
+#define DIFF_MODE               0x80
+#define LINE_ADCPGA_GAIN_MIN    0x40
+#define LINE_ADCPGA_DISCONNECT  0x78
+#define ADC_CHAN_ON             0x04
+#define ADCPGA_SOFT_STEP2FS     0x01
+#define ADCPGA_SOFT_STEP_OFF    0x03
+
+//LINE2L to left ADC Control Register 20
+#define ADC_WEAK_INPUT_BIAS     0x04
+
+//MICBIAS control register 25
+#define MICBIAS_OUTPUT_2_0V     0x40
+#define MICBIAS_OUTPUT_2_5V     0x80
+#define MICBIAS_OUTPUT_AVDD     0xC0
+
+//LEFT/RIGHT AGC Control registerA 26 & 29
+#define AGC_ENABLE              0x80
+#define AGC_TARGET_GAIN_MAX     0x00
+#define AGC_TARGET_GAIN_MIN     0x70
+#define AGC_ATTACK_TIME_11      0x04
+#define AGC_ATTACK_TIME_16      0x08
+#define AGC_ATTACK_TIME_20      0x0C
+#define AGC_DECAY_TIME_200      0x01
+#define AGC_DECAY_TIME_400      0x02
+#define AGC_DECAY_TIME_500      0x03
+
+//LEFT AGC Control registerB 27 & 30
+#define AGC_GAIN_ALLOWED_MAX    0xEE
+#define AGC_GAIN_ALLOWED_MIN    0x00
+
+//DAC Power and output driver control register 37
+#define LEFT_DAC_POWER_ON       0x80
+#define RIGHT_DAC_POWER_ON      0x40
+
+//High Power Output Stage Control Register 40
+#define LINE2L_BYPASS_DISABLE_DEFAULT    0x00
+#define LINE2LP_BYPASS_SINGLE            0x10
+#define LINE2LM_BYPASS_SINGLE            0x20
+#define LINE2LPM_BYPASS_DIFFERENTIAL     0x30
+
+#define LINE2R_BYPASS_DISABLE_DEFAULT    0x00
+#define LINE2RP_BYPASS_SINGLE            0x04
+#define LINE2RM_BYPASS_SINGLE            0x08
+#define LINE2RPM_BYPASS_DIFFERENTIAL     0x0C
+
+//DAC Output Switching Control Register 41
+#define LEFT_DAC_DEFAULT_L1     0x00
+#define LEFT_DAC_L2             0x80
+#define LEFT_DAC_L3             0x40
+#define RIGHT_DAC_DEFAULT_R1    0x00
+#define RIGHT_DAC_R2            0x08
+#define RIGHT_DAC_R3            0x04
+
+//LEFT/RIGHT DAC Digital volume control register 43 & 44
+#define DAC_CHAN_MUTE            0x80
+#define DAC_DIG_VOL_GAIN_MAX     0x00	// 0.0db
+#define DAC_DIG_VOL_GAIN_MIN     0x7F	// -63.5db
+
+//LINE2L to HPLOUT Volume Control Register 45
+#define LINE2L_HPLOUT_ROUTED              0x80
+
+//PGA_L to HPLOUT Volume Control Register 46
+#define PGAL_HPLOUT_ROUTED                0x80
+
+//any to LOP/M Volume control
+#define LOPM_ON                 0x80
+#define LOPM_VOL_GAIN_MAX       0x00	//0 db
+#define LOPM_VOL_GAIN_MIN       0x76	//-78.3 db is MUTE
+
+//MONO_LOP/M output level volume control register 79
+#define LOPM_POWER_ON            0x01
+#define LOPM_MUTE_OFF            0x08
+#define LOPM_OUTPUT_LEVEL_MIN    0x00
+#define LOPM_OUTPUT_LEVEL_MAX    0x90
+
+//Module Power Status Register 94
+#define HPROUT_DRIVER_POWER_ON           0x02
+
+#define LIV_MAX                         0x0077
+#define LIV_MIN                         0x0000
+
+#define LHV_MAX                         0x0077
+#define LHV_MIN                         0x0000
+
+#define LIG_MAX							0x0077
+#define LIG_MIN							0x0000
+
+#define LOG_MAX							0x007f
+#define LOG_MIN							0x0000
+
+#endif				/* __ASM_ARCH_AIC33_H */

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

+/*
+ * linux/sound/oss/davinci-audio-dma-intfc.h
+ *
+ * Common audio DMA handling for the Davinci processors
+ *
+ * Copyright (C) 2006 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:
+ *
+ * 2005-10-01   Rishi Bhattacharya / Sharath Kumar - Added support for TI Davinci DM644x processor
+ */
+
+#ifndef __DAVINCI_AUDIO_DMA_INTFC_H
+#define __DAVINCI_AUDIO_DMA_INTFC_H
+
+/******************************* INCLUDES *************************************/
+
+/* Requires davinci-audio.h */
+#include "davinci-audio.h"
+
+/************************** GLOBAL MACROS *************************************/
+
+/* Provide the Macro interfaces common across platforms */
+#define DMA_REQUEST(e,s, cb)   {e=davinci_request_sound_dma(s->dma_dev, s->id, s, &s->master_ch, &s->lch);}
+#define DMA_FREE(s)             davinci_free_sound_dma(s->master_ch,&s->lch)
+#define DMA_CLEAR(s)            davinci_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 davinci_clear_sound_dma(audio_stream_t * s);
+
+int davinci_request_sound_dma(int device_id, const char *device_name,
+			      void *data, int *master_ch, int **channels);
+int davinci_free_sound_dma(int master_ch, int **channels);
+
+#endif				/* #ifndef __DAVINCI_AUDIO_DMA_INTFC_H */

sound/oss/davinci-audio.h

+/*
+ * linux/sound/oss/davinci-audio.h
+ *
+ * Common audio handling for the Davinci processors
+ *
+ * Copyright (C) 2006 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:
+ *
+ * 2005-10-01   Rishi Bhattacharya - Adapted to TI Davinci Family of processors
+ */
+
+#ifndef __DAVINCI_AUDIO_H
+#define __DAVINCI_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 */
+	u_int prevbuf;		/* Prev pending frag size sent to DMA */
+	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 master_ch;
+	int *lch;		/*  Chain of channels this stream is linked to */
+	int input_or_output;	/* Direction of this data stream */
+	int bytecount;		/* nbr of processed bytes */
+	int fragcount;		/* nbr of fragment transitions */
+	struct completion wfc;	/* wait for "nbfrags" fragment completion */
+	wait_queue_head_t wq;	/* for poll */
+	int dma_spinref;	/* DMA is spinning */
+	int mapped:1;		/* mmap()'ed buffers */
+	int active:1;		/* actually in progress */
+	int stopped:1;		/* might be active but stopped */
+	int spin_idle:1;	/* have DMA spin on zeros when idle */
+	int dma_started;	/* to store if DMA was started or not */
+} 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;
+	int rd_ref:1;		/* open reference for recording */
+	int wr_ref:1;		/* open reference for playback */
+	int 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 davinci 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 __DAVINCI_AUDIO_H */