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charset="utf-8" Set the reg_base member of regmap_config for SoundWire so that the regmap core will apply the 0x8000 offset to addresses, instead of doing it within our low-level regmap read/write callbacks. Signed-off-by: Richard Fitzgerald --- No changes since V1. sound/soc/codecs/cs35l56-sdw.c | 7 +------ sound/soc/codecs/cs35l56-shared.c | 2 ++ 2 files changed, 3 insertions(+), 6 deletions(-) diff --git a/sound/soc/codecs/cs35l56-sdw.c b/sound/soc/codecs/cs35l56-sdw.c index d5b9e5f71de2..d9dcca1e952f 100644 --- a/sound/soc/codecs/cs35l56-sdw.c +++ b/sound/soc/codecs/cs35l56-sdw.c @@ -59,8 +59,6 @@ static int cs35l56_sdw_slow_read(struct sdw_slave *periph= eral, unsigned int reg, { int ret, i; =20 - reg +=3D CS35L56_SDW_ADDR_OFFSET; - for (i =3D 0; i < val_size; i +=3D sizeof(u32)) { /* Poll for bus bridge idle */ ret =3D cs35l56_sdw_poll_mem_status(peripheral, @@ -123,11 +121,9 @@ static int cs35l56_sdw_read(void *context, const void = *reg_buf, =20 reg =3D le32_to_cpu(*(const __le32 *)reg_buf); =20 - if (cs35l56_is_otp_register(reg)) + if (cs35l56_is_otp_register(reg - CS35L56_SDW_ADDR_OFFSET)) return cs35l56_sdw_slow_read(peripheral, reg, buf8, val_size); =20 - reg +=3D CS35L56_SDW_ADDR_OFFSET; - if (val_size =3D=3D 4) return cs35l56_sdw_read_one(peripheral, reg, val_buf); =20 @@ -186,7 +182,6 @@ static int cs35l56_sdw_gather_write(void *context, int ret; =20 reg =3D le32_to_cpu(*(const __le32 *)reg_buf); - reg +=3D CS35L56_SDW_ADDR_OFFSET; =20 if (val_size =3D=3D 4) return cs35l56_sdw_write_one(peripheral, reg, src_be); diff --git a/sound/soc/codecs/cs35l56-shared.c b/sound/soc/codecs/cs35l56-s= hared.c index 795e2764d67e..8e3538e28fad 100644 --- a/sound/soc/codecs/cs35l56-shared.c +++ b/sound/soc/codecs/cs35l56-shared.c @@ -1880,6 +1880,7 @@ EXPORT_SYMBOL_NS_GPL(cs35l56_regmap_spi, "SND_SOC_CS3= 5L56_SHARED"); =20 const struct regmap_config cs35l56_regmap_sdw =3D { .reg_bits =3D 32, + .reg_base =3D 0x8000, .val_bits =3D 32, .reg_stride =3D 4, .reg_format_endian =3D REGMAP_ENDIAN_LITTLE, @@ -1915,6 +1916,7 @@ const struct regmap_config cs35l63_regmap_sdw =3D { .reg_bits =3D 32, .val_bits =3D 32, .reg_stride =3D 4, + .reg_base =3D 0x8000, .reg_format_endian =3D REGMAP_ENDIAN_LITTLE, .val_format_endian =3D REGMAP_ENDIAN_BIG, .max_register =3D CS35L56_DSP1_PMEM_5114, --=20 2.47.3 From nobody Mon May 25 01:57:42 2026 Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3236A481667; 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charset="utf-8" Use the regmap_sdw implementation for SoundWire instead of re-implementing the low-level bus transactions in cs35l56-sdw.c The cs35l56 registers are big-endian on I2C and SPI but little-endian over SoundWire. The firmware files are all big-endian and contain opaque blobs in big-endian order. So these must be endian-swapped to transfer over SoundWire. A custom regmap bus implementation is used to do this endian-swapping. The original implementation of this custom regmap bus was a complete bus backend, performing the endian swapping and low-level SoundWire bus read/write. This commit changes the custom regmap bus to only perform the endian-swap. It uses an underlying simple uncached regmap_sdw bus to deal with transferring the 32-bit registers over the SoundWire bus. Although this adds a small amount of overhead, from passing through the regmap APIs twice, it avoids having a local duplicate implementation of what regmap_sdw already does. The slow-read handling for OTP registers must access 8-bit SoundWire registers so it still uses low-level SoundWire bus reads. Signed-off-by: Richard Fitzgerald --- Changed in V2: - Select REGMAP_SOUNDWIRE sound/soc/codecs/Kconfig | 2 +- sound/soc/codecs/cs35l56-sdw.c | 132 ++++++++++++--------------------- sound/soc/codecs/cs35l56.h | 1 + 3 files changed, 51 insertions(+), 84 deletions(-) diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index 5fdd0334c355..a7c61f7c7f4c 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -887,7 +887,7 @@ config SND_SOC_CS35L56_SPI config SND_SOC_CS35L56_SDW tristate "Cirrus Logic CS35L56 CODEC (SDW)" depends on SOUNDWIRE - select REGMAP + select REGMAP_SOUNDWIRE select SND_SOC_CS35L56 select SND_SOC_CS35L56_SHARED help diff --git a/sound/soc/codecs/cs35l56-sdw.c b/sound/soc/codecs/cs35l56-sdw.c index d9dcca1e952f..d2b82a846ae8 100644 --- a/sound/soc/codecs/cs35l56-sdw.c +++ b/sound/soc/codecs/cs35l56-sdw.c @@ -17,6 +17,7 @@ #include #include #include +#include #include =20 #include "cs35l56.h" @@ -95,55 +96,23 @@ static int cs35l56_sdw_slow_read(struct sdw_slave *peri= pheral, unsigned int reg, return 0; } =20 -static int cs35l56_sdw_read_one(struct sdw_slave *peripheral, unsigned int= reg, void *buf) -{ - int ret; - - ret =3D sdw_nread_no_pm(peripheral, reg, 4, (u8 *)buf); - if (ret !=3D 0) { - dev_err(&peripheral->dev, "Read failed @%#x:%d\n", reg, ret); - return ret; - } - - swab32s((u32 *)buf); - - return 0; -} - static int cs35l56_sdw_read(void *context, const void *reg_buf, const size_t reg_size, void *val_buf, size_t val_size) { struct sdw_slave *peripheral =3D context; - u8 *buf8 =3D val_buf; - unsigned int reg, bytes; + struct cs35l56_private *cs35l56 =3D dev_get_drvdata(&peripheral->dev); + unsigned int reg_addr =3D get_unaligned_le32(reg_buf); int ret; =20 - reg =3D le32_to_cpu(*(const __le32 *)reg_buf); + if (cs35l56_is_otp_register(reg_addr - CS35L56_SDW_ADDR_OFFSET)) + return cs35l56_sdw_slow_read(peripheral, reg_addr, (u8 *)val_buf, val_si= ze); =20 - if (cs35l56_is_otp_register(reg - CS35L56_SDW_ADDR_OFFSET)) - return cs35l56_sdw_slow_read(peripheral, reg, buf8, val_size); + ret =3D regmap_raw_read(cs35l56->sdw_bus_regmap, reg_addr, val_buf, val_s= ize); + if (ret) + return ret; =20 - if (val_size =3D=3D 4) - return cs35l56_sdw_read_one(peripheral, reg, val_buf); - - while (val_size) { - bytes =3D SDW_REG_NO_PAGE - (reg & SDW_REGADDR); /* to end of page */ - if (bytes > val_size) - bytes =3D val_size; - - ret =3D sdw_nread_no_pm(peripheral, reg, bytes, buf8); - if (ret !=3D 0) { - dev_err(&peripheral->dev, "Read failed @%#x..%#x:%d\n", - reg, reg + bytes - 1, ret); - return ret; - } - - swab32_array((u32 *)buf8, bytes / 4); - val_size -=3D bytes; - reg +=3D bytes; - buf8 +=3D bytes; - } + swab32_array((u32 *)val_buf, val_size / sizeof(u32)); =20 return 0; } @@ -157,57 +126,34 @@ static inline void cs35l56_swab_copy(void *dest, cons= t void *src, size_t nbytes) *dest32++ =3D swab32(*src32++); } =20 -static int cs35l56_sdw_write_one(struct sdw_slave *peripheral, unsigned in= t reg, const void *buf) -{ - u32 val_le =3D swab32(*(u32 *)buf); - int ret; - - ret =3D sdw_nwrite_no_pm(peripheral, reg, 4, (u8 *)&val_le); - if (ret !=3D 0) { - dev_err(&peripheral->dev, "Write failed @%#x:%d\n", reg, ret); - return ret; - } - - return 0; -} - static int cs35l56_sdw_gather_write(void *context, const void *reg_buf, size_t reg_size, const void *val_buf, size_t val_size) { struct sdw_slave *peripheral =3D context; - const u8 *src_be =3D val_buf; - u32 val_le_buf[64]; /* Define u32 so it is 32-bit aligned */ - unsigned int reg, bytes; + struct cs35l56_private *cs35l56 =3D dev_get_drvdata(&peripheral->dev); + unsigned int reg_addr =3D get_unaligned_le32(reg_buf); + u32 swab_buf[64]; /* Define u32 so it is 32-bit aligned */ int ret; =20 - reg =3D le32_to_cpu(*(const __le32 *)reg_buf); - - if (val_size =3D=3D 4) - return cs35l56_sdw_write_one(peripheral, reg, src_be); - - while (val_size) { - bytes =3D SDW_REG_NO_PAGE - (reg & SDW_REGADDR); /* to end of page */ - if (bytes > val_size) - bytes =3D val_size; - if (bytes > sizeof(val_le_buf)) - bytes =3D sizeof(val_le_buf); - - cs35l56_swab_copy(val_le_buf, src_be, bytes); - - ret =3D sdw_nwrite_no_pm(peripheral, reg, bytes, (u8 *)val_le_buf); - if (ret !=3D 0) { - dev_err(&peripheral->dev, "Write failed @%#x..%#x:%d\n", - reg, reg + bytes - 1, ret); + while (val_size > sizeof(swab_buf)) { + cs35l56_swab_copy(swab_buf, val_buf, sizeof(swab_buf)); + ret =3D regmap_raw_write(cs35l56->sdw_bus_regmap, reg_addr, + swab_buf, sizeof(swab_buf)); + if (ret) return ret; - } =20 - val_size -=3D bytes; - reg +=3D bytes; - src_be +=3D bytes; + val_size -=3D sizeof(swab_buf); + reg_addr +=3D sizeof(swab_buf); + val_buf +=3D sizeof(swab_buf); } =20 - return 0; + if (val_size =3D=3D 0) + return 0; + + cs35l56_swab_copy(swab_buf, val_buf, val_size); + + return regmap_raw_write(cs35l56->sdw_bus_regmap, reg_addr, swab_buf, val_= size); } =20 static int cs35l56_sdw_write(void *context, const void *val_buf, size_t va= l_size) @@ -226,7 +172,7 @@ static int cs35l56_sdw_write(void *context, const void = *val_buf, size_t val_size * byte controls always have the same byte order, and firmware file blobs * can be written verbatim. */ -static const struct regmap_bus cs35l56_regmap_bus_sdw =3D { +static const struct regmap_bus cs35l56_regmap_swab_bus_sdw =3D { .read =3D cs35l56_sdw_read, .write =3D cs35l56_sdw_write, .gather_write =3D cs35l56_sdw_gather_write, @@ -234,6 +180,18 @@ static const struct regmap_bus cs35l56_regmap_bus_sdw = =3D { .val_format_endian_default =3D REGMAP_ENDIAN_BIG, }; =20 +/* Low-level SoundWire regmap to transfer the data over the bus */ +static const struct regmap_config cs35l56_sdw_bus_regmap =3D { + .name =3D "sdw-le32", + .reg_bits =3D 32, + .val_bits =3D 32, + .reg_stride =3D 4, + .reg_format_endian =3D REGMAP_ENDIAN_LITTLE, + .val_format_endian =3D REGMAP_ENDIAN_LITTLE, + .max_register =3D CS35L56_DSP1_PMEM_5114 + 0x8000, + .cache_type =3D REGCACHE_NONE, +}; + static int cs35l56_sdw_get_unique_id(struct cs35l56_private *cs35l56) { int ret; @@ -555,8 +513,16 @@ static int cs35l56_sdw_probe(struct sdw_slave *periphe= ral, const struct sdw_devi =20 cs35l56->base.type =3D ((unsigned int)id->driver_data) & 0xff; =20 - cs35l56->base.regmap =3D devm_regmap_init(dev, &cs35l56_regmap_bus_sdw, - peripheral, regmap_config); + /* Low-level regmap to transfer read/writes over SoundWire bus */ + cs35l56->sdw_bus_regmap =3D devm_regmap_init_sdw(peripheral, &cs35l56_sdw= _bus_regmap); + if (IS_ERR(cs35l56->sdw_bus_regmap)) { + ret =3D PTR_ERR(cs35l56->sdw_bus_regmap); + return dev_err_probe(dev, ret, "Failed to allocate bus register map\n"); + } + + /* Wrapper regmap to simulate big-endian ordering */ + cs35l56->base.regmap =3D devm_regmap_init(dev, &cs35l56_regmap_swab_bus_s= dw, + peripheral, regmap_config); if (IS_ERR(cs35l56->base.regmap)) { ret =3D PTR_ERR(cs35l56->base.regmap); return dev_err_probe(dev, ret, "Failed to allocate register map\n"); diff --git a/sound/soc/codecs/cs35l56.h b/sound/soc/codecs/cs35l56.h index cd71b23b2a3a..d029fa3f8656 100644 --- a/sound/soc/codecs/cs35l56.h +++ b/sound/soc/codecs/cs35l56.h @@ -37,6 +37,7 @@ struct cs35l56_private { struct snd_soc_component *component; struct regulator_bulk_data supplies[CS35L56_NUM_BULK_SUPPLIES]; struct sdw_slave *sdw_peripheral; + struct regmap *sdw_bus_regmap; const char *fallback_fw_suffix; struct work_struct sdw_irq_work; bool sdw_irq_no_unmask; --=20 2.47.3