diff options
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/cs4270.c | 261 |
1 files changed, 128 insertions, 133 deletions
diff --git a/sound/soc/codecs/cs4270.c b/sound/soc/codecs/cs4270.c index dab22cc..968eda3 100644 --- a/sound/soc/codecs/cs4270.c +++ b/sound/soc/codecs/cs4270.c @@ -48,12 +48,130 @@ struct cs4270_private { unsigned int mode; /* The mode (I2S or left-justified) */ }; -/* The number of MCLK/LRCK ratios supported by the CS4270 */ -#define NUM_MCLK_RATIOS 9 +/* + * The codec isn't really big-endian or little-endian, since the I2S + * interface requires data to be sent serially with the MSbit first. + * However, to support BE and LE I2S devices, we specify both here. That + * way, ALSA will always match the bit patterns. + */ +#define CS4270_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ + SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \ + SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \ + SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \ + SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \ + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE) + +#ifdef USE_I2C + +/* CS4270 registers addresses */ +#define CS4270_CHIPID 0x01 /* Chip ID */ +#define CS4270_PWRCTL 0x02 /* Power Control */ +#define CS4270_MODE 0x03 /* Mode Control */ +#define CS4270_FORMAT 0x04 /* Serial Format, ADC/DAC Control */ +#define CS4270_TRANS 0x05 /* Transition Control */ +#define CS4270_MUTE 0x06 /* Mute Control */ +#define CS4270_VOLA 0x07 /* DAC Channel A Volume Control */ +#define CS4270_VOLB 0x08 /* DAC Channel B Volume Control */ + +#define CS4270_FIRSTREG 0x01 +#define CS4270_LASTREG 0x08 +#define CS4270_NUMREGS (CS4270_LASTREG - CS4270_FIRSTREG + 1) -/* The actual MCLK/LRCK ratios, in increasing numerical order */ -static unsigned int mclk_ratios[NUM_MCLK_RATIOS] = - {64, 96, 128, 192, 256, 384, 512, 768, 1024}; +/* Bit masks for the CS4270 registers */ +#define CS4270_CHIPID_ID 0xF0 +#define CS4270_CHIPID_REV 0x0F +#define CS4270_PWRCTL_FREEZE 0x80 +#define CS4270_PWRCTL_PDN_ADC 0x20 +#define CS4270_PWRCTL_PDN_DAC 0x02 +#define CS4270_PWRCTL_PDN 0x01 +#define CS4270_MODE_SPEED_MASK 0x30 +#define CS4270_MODE_1X 0x00 +#define CS4270_MODE_2X 0x10 +#define CS4270_MODE_4X 0x20 +#define CS4270_MODE_SLAVE 0x30 +#define CS4270_MODE_DIV_MASK 0x0E +#define CS4270_MODE_DIV1 0x00 +#define CS4270_MODE_DIV15 0x02 +#define CS4270_MODE_DIV2 0x04 +#define CS4270_MODE_DIV3 0x06 +#define CS4270_MODE_DIV4 0x08 +#define CS4270_MODE_POPGUARD 0x01 +#define CS4270_FORMAT_FREEZE_A 0x80 +#define CS4270_FORMAT_FREEZE_B 0x40 +#define CS4270_FORMAT_LOOPBACK 0x20 +#define CS4270_FORMAT_DAC_MASK 0x18 +#define CS4270_FORMAT_DAC_LJ 0x00 +#define CS4270_FORMAT_DAC_I2S 0x08 +#define CS4270_FORMAT_DAC_RJ16 0x18 +#define CS4270_FORMAT_DAC_RJ24 0x10 +#define CS4270_FORMAT_ADC_MASK 0x01 +#define CS4270_FORMAT_ADC_LJ 0x00 +#define CS4270_FORMAT_ADC_I2S 0x01 +#define CS4270_TRANS_ONE_VOL 0x80 +#define CS4270_TRANS_SOFT 0x40 +#define CS4270_TRANS_ZERO 0x20 +#define CS4270_TRANS_INV_ADC_A 0x08 +#define CS4270_TRANS_INV_ADC_B 0x10 +#define CS4270_TRANS_INV_DAC_A 0x02 +#define CS4270_TRANS_INV_DAC_B 0x04 +#define CS4270_TRANS_DEEMPH 0x01 +#define CS4270_MUTE_AUTO 0x20 +#define CS4270_MUTE_ADC_A 0x08 +#define CS4270_MUTE_ADC_B 0x10 +#define CS4270_MUTE_POLARITY 0x04 +#define CS4270_MUTE_DAC_A 0x01 +#define CS4270_MUTE_DAC_B 0x02 + +/* + * Clock Ratio Selection for Master Mode with I2C enabled + * + * The data for this chart is taken from Table 5 of the CS4270 reference + * manual. + * + * This table is used to determine how to program the Mode Control register. + * It is also used by cs4270_set_dai_sysclk() to tell ALSA which sampling + * rates the CS4270 currently supports. + * + * Each element in this array corresponds to the ratios in mclk_ratios[]. + * These two arrays need to be in sync. + * + * 'speed_mode' is the corresponding bit pattern to be written to the + * MODE bits of the Mode Control Register + * + * 'mclk' is the corresponding bit pattern to be wirten to the MCLK bits of + * the Mode Control Register. + * + * In situations where a single ratio is represented by multiple speed + * modes, we favor the slowest speed. E.g, for a ratio of 128, we pick + * double-speed instead of quad-speed. However, the CS4270 errata states + * that Divide-By-1.5 can cause failures, so we avoid that mode where + * possible. + * + * ERRATA: There is an errata for the CS4270 where divide-by-1.5 does not + * work if VD = 3.3V. If this effects you, select the + * CONFIG_SND_SOC_CS4270_VD33_ERRATA Kconfig option, and the driver will + * never select any sample rates that require divide-by-1.5. + */ +static struct { + unsigned int ratio; + u8 speed_mode; + u8 mclk; +} cs4270_mode_ratios[] = { + {64, CS4270_MODE_4X, CS4270_MODE_DIV1}, +#ifndef CONFIG_SND_SOC_CS4270_VD33_ERRATA + {96, CS4270_MODE_4X, CS4270_MODE_DIV15}, +#endif + {128, CS4270_MODE_2X, CS4270_MODE_DIV1}, + {192, CS4270_MODE_4X, CS4270_MODE_DIV3}, + {256, CS4270_MODE_1X, CS4270_MODE_DIV1}, + {384, CS4270_MODE_2X, CS4270_MODE_DIV3}, + {512, CS4270_MODE_1X, CS4270_MODE_DIV2}, + {768, CS4270_MODE_1X, CS4270_MODE_DIV3}, + {1024, CS4270_MODE_1X, CS4270_MODE_DIV4} +}; + +/* The number of MCLK/LRCK ratios supported by the CS4270 */ +#define NUM_MCLK_RATIOS ARRAY_SIZE(cs4270_mode_ratios) /* * Determine the CS4270 samples rates. @@ -97,7 +215,7 @@ static int cs4270_set_dai_sysclk(struct snd_soc_codec_dai *codec_dai, cs4270->mclk = freq; for (i = 0; i < NUM_MCLK_RATIOS; i++) { - unsigned int rate = freq / mclk_ratios[i]; + unsigned int rate = freq / cs4270_mode_ratios[i].ratio; rates |= snd_pcm_rate_to_rate_bit(rate); if (rate < rate_min) rate_min = rate; @@ -155,80 +273,6 @@ static int cs4270_set_dai_fmt(struct snd_soc_codec_dai *codec_dai, } /* - * The codec isn't really big-endian or little-endian, since the I2S - * interface requires data to be sent serially with the MSbit first. - * However, to support BE and LE I2S devices, we specify both here. That - * way, ALSA will always match the bit patterns. - */ -#define CS4270_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ - SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | \ - SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \ - SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \ - SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \ - SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE) - -#ifdef USE_I2C - -/* CS4270 registers addresses */ -#define CS4270_CHIPID 0x01 /* Chip ID */ -#define CS4270_PWRCTL 0x02 /* Power Control */ -#define CS4270_MODE 0x03 /* Mode Control */ -#define CS4270_FORMAT 0x04 /* Serial Format, ADC/DAC Control */ -#define CS4270_TRANS 0x05 /* Transition Control */ -#define CS4270_MUTE 0x06 /* Mute Control */ -#define CS4270_VOLA 0x07 /* DAC Channel A Volume Control */ -#define CS4270_VOLB 0x08 /* DAC Channel B Volume Control */ - -#define CS4270_FIRSTREG 0x01 -#define CS4270_LASTREG 0x08 -#define CS4270_NUMREGS (CS4270_LASTREG - CS4270_FIRSTREG + 1) - -/* Bit masks for the CS4270 registers */ -#define CS4270_CHIPID_ID 0xF0 -#define CS4270_CHIPID_REV 0x0F -#define CS4270_PWRCTL_FREEZE 0x80 -#define CS4270_PWRCTL_PDN_ADC 0x20 -#define CS4270_PWRCTL_PDN_DAC 0x02 -#define CS4270_PWRCTL_PDN 0x01 -#define CS4270_MODE_SPEED_MASK 0x30 -#define CS4270_MODE_1X 0x00 -#define CS4270_MODE_2X 0x10 -#define CS4270_MODE_4X 0x20 -#define CS4270_MODE_SLAVE 0x30 -#define CS4270_MODE_DIV_MASK 0x0E -#define CS4270_MODE_DIV1 0x00 -#define CS4270_MODE_DIV15 0x02 -#define CS4270_MODE_DIV2 0x04 -#define CS4270_MODE_DIV3 0x06 -#define CS4270_MODE_DIV4 0x08 -#define CS4270_MODE_POPGUARD 0x01 -#define CS4270_FORMAT_FREEZE_A 0x80 -#define CS4270_FORMAT_FREEZE_B 0x40 -#define CS4270_FORMAT_LOOPBACK 0x20 -#define CS4270_FORMAT_DAC_MASK 0x18 -#define CS4270_FORMAT_DAC_LJ 0x00 -#define CS4270_FORMAT_DAC_I2S 0x08 -#define CS4270_FORMAT_DAC_RJ16 0x18 -#define CS4270_FORMAT_DAC_RJ24 0x10 -#define CS4270_FORMAT_ADC_MASK 0x01 -#define CS4270_FORMAT_ADC_LJ 0x00 -#define CS4270_FORMAT_ADC_I2S 0x01 -#define CS4270_TRANS_ONE_VOL 0x80 -#define CS4270_TRANS_SOFT 0x40 -#define CS4270_TRANS_ZERO 0x20 -#define CS4270_TRANS_INV_ADC_A 0x08 -#define CS4270_TRANS_INV_ADC_B 0x10 -#define CS4270_TRANS_INV_DAC_A 0x02 -#define CS4270_TRANS_INV_DAC_B 0x04 -#define CS4270_TRANS_DEEMPH 0x01 -#define CS4270_MUTE_AUTO 0x20 -#define CS4270_MUTE_ADC_A 0x08 -#define CS4270_MUTE_ADC_B 0x10 -#define CS4270_MUTE_POLARITY 0x04 -#define CS4270_MUTE_DAC_A 0x01 -#define CS4270_MUTE_DAC_B 0x02 - -/* * A list of addresses on which this CS4270 could use. I2C addresses are * 7 bits. For the CS4270, the upper four bits are always 1001, and the * lower three bits are determined via the AD2, AD1, and AD0 pins @@ -315,53 +359,6 @@ static int cs4270_i2c_write(struct snd_soc_codec *codec, unsigned int reg, } /* - * Clock Ratio Selection for Master Mode with I2C enabled - * - * The data for this chart is taken from Table 5 of the CS4270 reference - * manual. - * - * This table is used to determine how to program the Mode Control register. - * It is also used by cs4270_set_dai_sysclk() to tell ALSA which sampling - * rates the CS4270 currently supports. - * - * Each element in this array corresponds to the ratios in mclk_ratios[]. - * These two arrays need to be in sync. - * - * 'speed_mode' is the corresponding bit pattern to be written to the - * MODE bits of the Mode Control Register - * - * 'mclk' is the corresponding bit pattern to be wirten to the MCLK bits of - * the Mode Control Register. - * - * In situations where a single ratio is represented by multiple speed - * modes, we favor the slowest speed. E.g, for a ratio of 128, we pick - * double-speed instead of quad-speed. However, the CS4270 errata states - * that Divide-By-1.5 can cause failures, so we avoid that mode where - * possible. - * - * ERRATA: There is an errata for the CS4270 where divide-by-1.5 does not - * work if VD = 3.3V. If this effects you, select the - * CONFIG_SND_SOC_CS4270_VD33_ERRATA Kconfig option, and the driver will - * never select any sample rates that require divide-by-1.5. - */ -static struct { - u8 speed_mode; - u8 mclk; -} cs4270_mode_ratios[NUM_MCLK_RATIOS] = { - {CS4270_MODE_4X, CS4270_MODE_DIV1}, /* 64 */ -#ifndef CONFIG_SND_SOC_CS4270_VD33_ERRATA - {CS4270_MODE_4X, CS4270_MODE_DIV15}, /* 96 */ -#endif - {CS4270_MODE_2X, CS4270_MODE_DIV1}, /* 128 */ - {CS4270_MODE_4X, CS4270_MODE_DIV3}, /* 192 */ - {CS4270_MODE_1X, CS4270_MODE_DIV1}, /* 256 */ - {CS4270_MODE_2X, CS4270_MODE_DIV3}, /* 384 */ - {CS4270_MODE_1X, CS4270_MODE_DIV2}, /* 512 */ - {CS4270_MODE_1X, CS4270_MODE_DIV3}, /* 768 */ - {CS4270_MODE_1X, CS4270_MODE_DIV4} /* 1024 */ -}; - -/* * Program the CS4270 with the given hardware parameters. * * The .dai_ops functions are used to provide board-specific data, like @@ -388,7 +385,7 @@ static int cs4270_hw_params(struct snd_pcm_substream *substream, ratio = cs4270->mclk / rate; /* MCLK/LRCK ratio */ for (i = 0; i < NUM_MCLK_RATIOS; i++) { - if (mclk_ratios[i] == ratio) + if (cs4270_mode_ratios[i].ratio == ratio) break; } @@ -669,7 +666,7 @@ error: return ret; } -#endif +#endif /* USE_I2C*/ struct snd_soc_codec_dai cs4270_dai = { .name = "CS4270", @@ -687,10 +684,6 @@ struct snd_soc_codec_dai cs4270_dai = { .rates = 0, .formats = CS4270_FORMATS, }, - .dai_ops = { - .set_sysclk = cs4270_set_dai_sysclk, - .set_fmt = cs4270_set_dai_fmt, - } }; EXPORT_SYMBOL_GPL(cs4270_dai); @@ -752,6 +745,8 @@ static int cs4270_probe(struct platform_device *pdev) if (codec->control_data) { /* Initialize codec ops */ cs4270_dai.ops.hw_params = cs4270_hw_params; + cs4270_dai.dai_ops.set_sysclk = cs4270_set_dai_sysclk; + cs4270_dai.dai_ops.set_fmt = cs4270_set_dai_fmt; #ifdef CONFIG_SND_SOC_CS4270_HWMUTE cs4270_dai.dai_ops.digital_mute = cs4270_mute; #endif |