omap2-audio-twl4030.h

omap3 linux 2.6 用nocc去除了冗余代码

	.period_bytes_min = 32,
	.period_bytes_max = 8 * 1024,
	.periods_min = 16,
	.periods_max = 255,
	.fifo_size = 0,
};

static struct snd_pcm_hardware twl4030_pcm_hardware_capture = {
	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
		 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME),
	.formats = (SNDRV_PCM_FMTBIT_S16_LE),
	.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |
		  SNDRV_PCM_RATE_16000 |
		  SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
		  SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
		  SNDRV_PCM_RATE_KNOT),
	.rate_min = 8000,
	.rate_max = 48000,
	.channels_min = 1,
	.channels_max = 2,
	.buffer_bytes_max = 128 * 1024,
	.period_bytes_min = 32,
	.period_bytes_max = 8 * 1024,
	.periods_min = 16,
	.periods_max = 255,
	.fifo_size = 0,
};

static int mixer_dev_id;

struct twl_local_info {
	/* Global volume control */
	u16 play_volume; /* Store the play volume */
	u16 rec_volume; /* Store the record volume */
	/* Device specific volume control */
	u16 hset; /* Store the hset volume */
	u16 classd; /* Store the classd volume */
	u16 ear; /* Store the ear volume */
	u16 line; /* Store the line volume */
	u16 mic; /* Store the mic volume */
	u16 aux; /* Store aux/FM volume */
	u16 sidetone; /* Store sidetone volume */
	u16 carkit_out; /* Store carkit output gain */
	u16 carkit_in; /* Store carkit input gain */
	/* Source Management */
	int recsrc; /* current active record sources */
	int outsrc; /* current active playback sources */
	int mod_cnt;/* how many usages */
};
static struct twl_local_info twl4030_local = {
	.play_volume =  WRITE_LR_VOLUME(DEFAULT_OUTPUT_VOLUME),
	.rec_volume = WRITE_LR_VOLUME(DEFAULT_INPUT_VOLUME),
	.line = WRITE_LR_VOLUME(DEFAULT_INPUT_LINE_VOLUME),
	.mic = WRITE_LR_VOLUME(DEFAULT_INPUT_MIC_VOLUME),
	.aux = WRITE_LR_VOLUME(DEFAULT_INPUT_LINE_VOLUME),
	.hset = WRITE_LR_VOLUME(DEFAULT_OUTPUT_HSET_VOLUME),
	.classd = WRITE_LR_VOLUME(DEFAULT_OUTPUT_SPK_VOLUME),
	.ear = WRITE_LEFT_VOLUME(DEFAULT_OUTPUT_EAR_VOLUME),
	.sidetone = WRITE_LEFT_VOLUME(DEFAULT_SIDETONE_VOLUME),
	.carkit_out = WRITE_LR_VOLUME(DEFAULT_OUTPUT_CARKIT_VOLUME),
	.carkit_in = WRITE_LEFT_VOLUME(DEFAULT_INPUT_CARKIT_VOLUME),
	.recsrc = DEFAULT_INPUT_LNX_DEVICE,
	.outsrc = DEFAULT_OUTPUT_LNX_DEVICE,
	.mod_cnt = 0,
};

/* Configured count -
 * Codec is configured when this reaches 1
 * Codec is shutdown when this reaches 0
 */
static char twl4030_configured = 0;

struct mcbsp_config {
	u8 mcbsp_clk_src;	/* source it from prcm? */
	u8 srg_clk_src;		/* clks/fclk/clkr/clkx */
	u8 srg_clk_sync;	/* free_running or just running */
	u8 srg_clk_pol;		/* polarity of srg clk */
	u8 tx_clk_pol;          /* TX clock polarity */
	u8 tx_clk_src;		/* internal/external (master based) */
	u8 rx_clk_pol;          /* TX clock polarity */
	u8 rx_clk_src;		/* internal/external (master based) */
	u8 fs_clk_pol;		/* Frame sync polarity */
	u8 tx_polarity;		/* TX polarity */
	u8 rx_polarity;		/* RX polarity */
	u8 rx_ip_clk;           /* Rx input clock */
	u8 tx_ip_clk;           /* Tx input clock */
	omap2_mcbsp_transfer_params tx_params; /* Transmit parameters */
	omap2_mcbsp_transfer_params rx_params; /* Recieve parameters */
};

/* Default volume */
static int current_input = DEFAULT_INPUT_TWL_DEVICE;
static int current_output = DEFAULT_OUTPUT_TWL_DEVICE;
/* Switch flags */
u8 handsfree_en = 1;
u8 hsmic_en     = 1;
u8 main_mic_en  = 1;
u8 sub_mic_en   = 1;
/* To Store the default sample rate */
static long audio_samplerate = AUDIO_RATE_DEFAULT;
struct sample_rate_info_t {
	u16 rate;
	u8 apll;
};
/* Hint - optimization wise move the most used values up the list */
static const struct sample_rate_info_t valid_sample_rates[] = {
	{.rate = 8000,.apll = AUDIO_MODE_RATE_08_000},
	{.rate = 16000,.apll = AUDIO_MODE_RATE_16_000},
	{.rate = 44100,.apll = AUDIO_MODE_RATE_44_100},
	{.rate = 11025,.apll = AUDIO_MODE_RATE_11_025},
	{.rate = 12000,.apll = AUDIO_MODE_RATE_12_000},
	{.rate = 22050,.apll = AUDIO_MODE_RATE_22_050},
	{.rate = 24000,.apll = AUDIO_MODE_RATE_24_000},
	{.rate = 32000,.apll = AUDIO_MODE_RATE_32_000},
	{.rate = 48000,.apll = AUDIO_MODE_RATE_48_000},
	/* Dont support 96Khz -requires HSCLK >26Mhz
	   { .rate = 96000, .apll = AUDIO_MODE_RATE_96_000 }, */
};

#define NUMBER_OF_RATES_SUPPORTED (sizeof (valid_sample_rates)/\
				   sizeof (struct sample_rate_info_t))

/* Give time for these to settle down
 * one frame (worst case is at 8000hz) = 125 uSec
 * wait two frame duration each - giving dma a chance to push data thru also
 * =125*4= 500uSec
 */
#define TWL4030_MCBSP2_3430SDP_PRESCALE_TIME 500

/* if we would like to listen to mono sound as stereo on stereo devices
 */
#undef MONO_MODE_SOUNDS_STEREO

/* How long to wait for stream to remain active?in Jiffies */
#define TIMEOUT_WAIT_FOR_ACTIVE       20

/* T2 GPIO for External Mute control - required for pop noise */
#define T2_AUD_EXT_MUT_GPIO 6
#define GPIO_DATA_DIR  0x03
#define GPIO_CLR  0x09
#define GPIO_SET  0x0C

static u8 current_bitspersample = AUDIO_SAMPLE_DATA_WIDTH_16;

static u8 current_stereomode = STEREO_MODE;

/* To handle transfer errors.. */
static int tx_err, rx_err;

/******************** MODULES SPECIFIC FUNCTION PROTOTYPES ********************/
static inline int audio_twl4030_write(u8 address, u8 data);
static inline int audio_twl4030_read(u8 address);
static inline int twl4030_codec_on(void);
static inline int twl4030_codec_off(void);
static int twl4030_enable_output(void);
static int twl4030_disable_output(void);
static int twl4030_enable_input(void);
static int twl4030_disable_input(void);
static int twl4030_disable_input(void);
static int twl4030_select_source(int flag, int val);
static int twl4030_setvolume(int flag, u8 gain_l, u8 gain_r);
static int twl4030_codec_conf_data_path(void);
static int twl4030_conf_data_interface(void);
static int twl4030_set_samplerate(long sample_rate);
static int twl4030_stereomode_set(int mode, int dsp);
static void twl4030_unconfigure(void);
static int twl4030_configure(void);
static void twl4030_mcbsp_dma_cb(u16 ch_status, void *arg);
static int omap_twl4030_transfer(int mode, void *buffer_phy,u32 size, void *arg);
static int omap_twl4030_transfer_stop(int mode);
static int omap_twl4030_transfer_posn(int mode);
static int omap_twl4030_transfer_init(int mode);
static int omap_twl4030_initialize(void);
static void omap_twl4030_shutdown(void);
static int omap_twl4030_sidle(u32 level);
static int omap_twl4030_probe(void);

static int omap_twl4030_mixer_init(struct snd_card *card);
static int omap_twl4030_mixer_shutdown(struct snd_card *card);



/******************** DATA STRUCTURES USING FUNCTION POINTERS *****************/

/*
 * The TWL4030 will always use stereo I2S protocol to communicate
 *
 * McBSP Configuration Required:
 * Stereo 16 bit:(default)
 * -------------
 * Single phase, FSYNC=Rising, words=1 DMA->Normal,32bit DXR
 *
 * Stereo 24 bit:
 * -------------
 * Single phase, FSYNC=Falling, words=2 DMA->Normal,32bit DXR
 *
 * Mono 16 bit:
 * ------------
 * Single phase, FSYNC=Rising, words=1 DMA->Normal,16 bit DXR+2
 * OR
 * Single phase, FSYNC=Falling, words=1 DMA->Normal,32bit DXR
 *
 * Mono 24 bit:
 * ------------
 * Single phase, FSYNC=Falling, words=2 DMA-> ei=1,fi=-1,32bit DXR
 *
 */
static struct mcbsp_config plat_mcbsp_config = {
	.mcbsp_clk_src = OMAP2_MCBSP_FCLKSRC_PRCM,
	/* Driven by twl4030 */
	.srg_clk_src = OMAP2_MCBSP_SRGCLKSRC_CLKX,
	.tx_clk_src = OMAP2_MCBSP_TXFSYNC_EXTERNAL,
	.rx_clk_src = OMAP2_MCBSP_RXFSYNC_EXTERNAL,
	.rx_ip_clk = OMAP2_MCBSP_CLKRXSRC_EXTERNAL,
	.tx_ip_clk = OMAP2_MCBSP_CLKTXSRC_EXTERNAL,

	.srg_clk_sync = OMAP2_MCBSP_SRG_FREERUNNING,
	.tx_polarity = OMAP2_MCBSP_FS_ACTIVE_LOW,
	.rx_polarity = OMAP2_MCBSP_FS_ACTIVE_LOW,
	.srg_clk_pol = OMAP2_MCBSP_CLKX_POLARITY_FALLING,
	.tx_clk_pol = OMAP2_MCBSP_CLKX_POLARITY_RISING,
	.rx_clk_pol = OMAP2_MCBSP_CLKR_POLARITY_RISING,
	/* we will start with right channel and transmit the MSB of DXR */
	.fs_clk_pol = OMAP2_MCBSP_FS_ACTIVE_HIGH,
	/* I2S */
	.tx_params = {
			       .data_type = OMAP2_MCBSP_WORDLEN_NONE,
			       .skip_alt = OMAP2_MCBSP_SKIP_NONE,
			       .auto_reset = OMAP2_MCBSP_AUTO_XRST,
			       .phase = OMAP2_MCBSP_FRAME_DUALPHASE,
			       .data_delay = OMAP2_MCBSP_DATADELAY1,	/* 1 bit delay expected */
			       .reverse_compand = OMAP2_MCBSP_MSBFIRST,	/* Set msb first */
			       .word_length1 = OMAP2_MCBSP_WORDLEN_16,	/* RWDLEN1 */
			       .word_length2 = OMAP2_MCBSP_WORDLEN_16,	/* RWDLEN2 -dnt care*/
			       .frame_length1 = OMAP2_MCBSP_FRAMELEN_1,	/* RFRLEN1 */
			       .frame_length2 = OMAP2_MCBSP_FRAMELEN_1,	/* RFRLEN2 -dnt care*/
			       .justification = OMAP2_MCBSP_RJUST_ZEROMSB,	/* RJUST and fill 0s */
			       .dxena = 0,
			       .dxendly = 0,
			       .callback = twl4030_mcbsp_dma_cb,
			       },
	.rx_params = {
			       .data_type = OMAP2_MCBSP_WORDLEN_NONE,
			       .skip_alt = OMAP2_MCBSP_SKIP_NONE,
			       .auto_reset = OMAP2_MCBSP_AUTO_RRST,
			       .phase = OMAP2_MCBSP_FRAME_DUALPHASE,
			       .data_delay = OMAP2_MCBSP_DATADELAY1,	/* 1 bit delay expected */
			       .reverse_compand = OMAP2_MCBSP_MSBFIRST,	/* Set msb first */
			       .word_length1 = OMAP2_MCBSP_WORDLEN_16,	/* RWDLEN1 */
			       .word_length2 = OMAP2_MCBSP_WORDLEN_16,	/* RWDLEN2 -dntcare*/
			       .frame_length1 = OMAP2_MCBSP_FRAMELEN_1,	/* RFRLEN1 */
			       .frame_length2 = OMAP2_MCBSP_FRAMELEN_1,	/* RFRLEN2 */
			       .justification = OMAP2_MCBSP_RJUST_ZEROMSB,	/* RJUST and fill 0s */
			       .dxena = 0,
			       .dxendly = 0,
			       .callback = twl4030_mcbsp_dma_cb,
			       },
};

static int twl4030_default_samplerate(void)
{
	return AUDIO_RATE_DEFAULT;
}
/* To store characteristic info regarding the codec for the audio driver */
static struct omap_alsa_codec omap_twl_codec = {
	.name = CODEC_NAME,

	.pcm_hw_constraint_list = &twl4030_pcm_hw_constraint_list,
	.pcm_hardware_playback = &twl4030_pcm_hardware_playback,
	.pcm_hardware_capture = &twl4030_pcm_hardware_capture,

	.codec_probe = omap_twl4030_probe,
	.codec_init = omap_twl4030_initialize,
	.codec_shutdown = omap_twl4030_shutdown,
	.codec_sidle = omap_twl4030_sidle,

	.codec_set_samplerate = twl4030_set_samplerate,
	.codec_set_stereomode = twl4030_stereomode_set,
	.codec_default_samplerate = twl4030_default_samplerate,

	.codec_transfer_init = omap_twl4030_transfer_init,
	.codec_transfer_start = omap_twl4030_transfer,
	.codec_transfer_stop = omap_twl4030_transfer_stop,
	.codec_transfer_posn = omap_twl4030_transfer_posn,

	.mixer_init = omap_twl4030_mixer_init,
	.mixer_shutdown = omap_twl4030_mixer_shutdown,
};