From: Danny Smith dannys@axis.com

Safeload support has been implemented which is used when updating for instance filter parameters using alsa controls. Without safeload support audio can become distorted during update.

Signed-off-by: Danny Smith dannys@axis.com Signed-off-by: Robert Rosengren robertr@axis.com --- sound/soc/codecs/adau17x1.c | 69 +++++++++++++++++++++++++++++++++++++++++++-- sound/soc/codecs/adau17x1.h | 1 + 2 files changed, 68 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/adau17x1.c b/sound/soc/codecs/adau17x1.c index 57169b8ff14e..342ed0e04b1d 100644 --- a/sound/soc/codecs/adau17x1.c +++ b/sound/soc/codecs/adau17x1.c @@ -26,6 +26,10 @@ #include "adau17x1.h" #include "adau-utils.h"

+#define ADAU17X1_SAFELOAD_TARGET_ADDRESS 0x0006 +#define ADAU17X1_SAFELOAD_TRIGGER 0x0007 +#define ADAU17X1_SAFELOAD_DATA(i) (0x0001 + (i)) + static const char * const adau17x1_capture_mixer_boost_text[] = { "Normal operation", "Boost Level 1", "Boost Level 2", "Boost Level 3", }; @@ -326,6 +330,18 @@ bool adau17x1_has_dsp(struct adau *adau) } EXPORT_SYMBOL_GPL(adau17x1_has_dsp);

+bool adau17x1_has_safeload(struct adau *adau) +{ + switch (adau->type) { + case ADAU1761: + case ADAU1781: + return true; + default: + return false; + } +} +EXPORT_SYMBOL_GPL(adau17x1_has_safeload); + static int adau17x1_set_dai_pll(struct snd_soc_dai *dai, int pll_id, int source, unsigned int freq_in, unsigned int freq_out) { @@ -957,6 +973,50 @@ int adau17x1_resume(struct snd_soc_component *component) } EXPORT_SYMBOL_GPL(adau17x1_resume);

+static int adau17x1_safeload(struct sigmadsp *sigmadsp, unsigned int addr, + const uint8_t bytes[], size_t len) +{ + uint8_t buf[4]; + unsigned int i; + int ret; + + /* target address is offset by 1 */ + unsigned int addr_offset = addr - 1; + + /* write safeload addresses */ + for (i = 0; i < len / 4; i++) { + memcpy(buf, bytes + i * 4, 4); + ret = regmap_raw_write(sigmadsp->control_data, + ADAU17X1_SAFELOAD_DATA(i), buf, 4); + if (ret < 0) + return ret; + } + + /* write target address */ + buf[0] = (addr_offset >> 24) & 0xff; + buf[1] = (addr_offset >> 16) & 0xff; + buf[2] = (addr_offset >> 8) & 0xff; + buf[3] = (addr_offset) & 0xff; + ret = regmap_raw_write(sigmadsp->control_data, + ADAU17X1_SAFELOAD_TARGET_ADDRESS, buf, 4); + if (ret < 0) + return ret; + + /* write nbr of words to trigger address */ + buf[0] = 0x00; + buf[1] = 0x00; + buf[2] = 0x00; + buf[3] = i & 0xff; + ret = regmap_raw_write(sigmadsp->control_data, + ADAU17X1_SAFELOAD_TRIGGER, buf, 4); + + return ret; +} + +static const struct sigmadsp_ops adau17x1_sigmadsp_ops = { + .safeload = adau17x1_safeload, +}; + int adau17x1_probe(struct device *dev, struct regmap *regmap, enum adau17x1_type type, void (*switch_mode)(struct device *dev), const char *firmware_name) @@ -1002,8 +1062,13 @@ int adau17x1_probe(struct device *dev, struct regmap *regmap, dev_set_drvdata(dev, adau);

if (firmware_name) { - adau->sigmadsp = devm_sigmadsp_init_regmap(dev, regmap, NULL, - firmware_name); + if (adau17x1_has_safeload(adau)) { + adau->sigmadsp = devm_sigmadsp_init_regmap(dev, regmap, + &adau17x1_sigmadsp_ops, firmware_name); + } else { + adau->sigmadsp = devm_sigmadsp_init_regmap(dev, regmap, + NULL, firmware_name); + } if (IS_ERR(adau->sigmadsp)) { dev_warn(dev, "Could not find firmware file: %ld\n", PTR_ERR(adau->sigmadsp)); diff --git a/sound/soc/codecs/adau17x1.h b/sound/soc/codecs/adau17x1.h index e6fe87beec07..8efa2df81c49 100644 --- a/sound/soc/codecs/adau17x1.h +++ b/sound/soc/codecs/adau17x1.h @@ -71,6 +71,7 @@ extern const struct snd_soc_dai_ops adau17x1_dai_ops; int adau17x1_setup_firmware(struct snd_soc_component *component, unsigned int rate); bool adau17x1_has_dsp(struct adau *adau); +bool adau17x1_has_safeload(struct adau *adau);

#define ADAU17X1_CLOCK_CONTROL 0x4000 #define ADAU17X1_PLL_CONTROL 0x4002