diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2019-05-06 14:44:06 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-05-06 23:59:13 +0900 |
| commit | 1a5c0b28fc56044737f988960f3bc5fdcdba0827 (patch) | |
| tree | 6224ab311597dbd3d3c5423113bd299126536dd0 /sound/soc/stm | |
| parent | b9960f6ea22da072c2fb27305a1a51517c3643fe (diff) | |
ASoC: stm32: spdifrx: manage identification registers
Add support of identification registers in STM32 SPDIFRX.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/stm')
| -rw-r--r-- | sound/soc/stm/stm32_spdifrx.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/sound/soc/stm/stm32_spdifrx.c b/sound/soc/stm/stm32_spdifrx.c index b4c3d983e195..62a887ee4a03 100644 --- a/sound/soc/stm/stm32_spdifrx.c +++ b/sound/soc/stm/stm32_spdifrx.c @@ -16,6 +16,7 @@ * details. */ +#include <linux/bitfield.h> #include <linux/clk.h> #include <linux/completion.h> #include <linux/delay.h> @@ -36,6 +37,9 @@ #define STM32_SPDIFRX_DR 0x10 #define STM32_SPDIFRX_CSR 0x14 #define STM32_SPDIFRX_DIR 0x18 +#define STM32_SPDIFRX_VERR 0x3F4 +#define STM32_SPDIFRX_IDR 0x3F8 +#define STM32_SPDIFRX_SIDR 0x3FC /* Bit definition for SPDIF_CR register */ #define SPDIFRX_CR_SPDIFEN_SHIFT 0 @@ -169,6 +173,18 @@ #define SPDIFRX_SPDIFEN_SYNC 0x1 #define SPDIFRX_SPDIFEN_ENABLE 0x3 +/* Bit definition for SPDIFRX_VERR register */ +#define SPDIFRX_VERR_MIN_MASK GENMASK(3, 0) +#define SPDIFRX_VERR_MAJ_MASK GENMASK(7, 4) + +/* Bit definition for SPDIFRX_IDR register */ +#define SPDIFRX_IDR_ID_MASK GENMASK(31, 0) + +/* Bit definition for SPDIFRX_SIDR register */ +#define SPDIFRX_SIDR_SID_MASK GENMASK(31, 0) + +#define SPDIFRX_IPIDR_NUMBER 0x00130041 + #define SPDIFRX_IN1 0x1 #define SPDIFRX_IN2 0x2 #define SPDIFRX_IN3 0x3 @@ -607,6 +623,9 @@ static bool stm32_spdifrx_readable_reg(struct device *dev, unsigned int reg) case STM32_SPDIFRX_DR: case STM32_SPDIFRX_CSR: case STM32_SPDIFRX_DIR: + case STM32_SPDIFRX_VERR: + case STM32_SPDIFRX_IDR: + case STM32_SPDIFRX_SIDR: return true; default: return false; @@ -642,10 +661,11 @@ static const struct regmap_config stm32_h7_spdifrx_regmap_conf = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, - .max_register = STM32_SPDIFRX_DIR, + .max_register = STM32_SPDIFRX_SIDR, .readable_reg = stm32_spdifrx_readable_reg, .volatile_reg = stm32_spdifrx_volatile_reg, .writeable_reg = stm32_spdifrx_writeable_reg, + .num_reg_defaults_raw = STM32_SPDIFRX_SIDR / sizeof(u32) + 1, .fast_io = true, .cache_type = REGCACHE_FLAT, }; @@ -911,6 +931,7 @@ static int stm32_spdifrx_probe(struct platform_device *pdev) struct stm32_spdifrx_data *spdifrx; struct reset_control *rst; const struct snd_dmaengine_pcm_config *pcm_config = NULL; + u32 ver, idr; int ret; spdifrx = devm_kzalloc(&pdev->dev, sizeof(*spdifrx), GFP_KERNEL); @@ -967,7 +988,19 @@ static int stm32_spdifrx_probe(struct platform_device *pdev) goto error; } - return 0; + ret = regmap_read(spdifrx->regmap, STM32_SPDIFRX_IDR, &idr); + if (ret) + goto error; + + if (idr == SPDIFRX_IPIDR_NUMBER) { + ret = regmap_read(spdifrx->regmap, STM32_SPDIFRX_VERR, &ver); + + dev_dbg(&pdev->dev, "SPDIFRX version: %lu.%lu registered\n", + FIELD_GET(SPDIFRX_VERR_MAJ_MASK, ver), + FIELD_GET(SPDIFRX_VERR_MIN_MASK, ver)); + } + + return ret; error: if (!IS_ERR(spdifrx->ctrl_chan)) |