This adds an implemention of SoC DAI driver which provides access to the I2S port of the device.
Signed-off-by: Alexander Riesen <alexander.rie...@cetitec.com> -- v3: fix clock registration in case of multiple adv748x devices Suggested-by: Geert Uytterhoeven <ge...@linux-m68k.org> --- drivers/media/i2c/adv748x/Makefile | 3 +- drivers/media/i2c/adv748x/adv748x-core.c | 9 +- drivers/media/i2c/adv748x/adv748x-dai.c | 265 +++++++++++++++++++++++ drivers/media/i2c/adv748x/adv748x.h | 17 +- 4 files changed, 291 insertions(+), 3 deletions(-) create mode 100644 drivers/media/i2c/adv748x/adv748x-dai.c diff --git a/drivers/media/i2c/adv748x/Makefile b/drivers/media/i2c/adv748x/Makefile index 93844f14cb10..6e7a302ef199 100644 --- a/drivers/media/i2c/adv748x/Makefile +++ b/drivers/media/i2c/adv748x/Makefile @@ -3,6 +3,7 @@ adv748x-objs := \ adv748x-afe.o \ adv748x-core.o \ adv748x-csi2.o \ - adv748x-hdmi.o + adv748x-hdmi.o \ + adv748x-dai.o obj-$(CONFIG_VIDEO_ADV748X) += adv748x.o diff --git a/drivers/media/i2c/adv748x/adv748x-core.c b/drivers/media/i2c/adv748x/adv748x-core.c index 8580e6624276..3513ca138e53 100644 --- a/drivers/media/i2c/adv748x/adv748x-core.c +++ b/drivers/media/i2c/adv748x/adv748x-core.c @@ -765,8 +765,14 @@ static int adv748x_probe(struct i2c_client *client) goto err_cleanup_txa; } + ret = adv748x_dai_init(&state->dai); + if (ret) { + adv_err(state, "Failed to probe DAI\n"); + goto err_cleanup_txb; + } return 0; - +err_cleanup_txb: + adv748x_csi2_cleanup(&state->txb); err_cleanup_txa: adv748x_csi2_cleanup(&state->txa); err_cleanup_afe: @@ -787,6 +793,7 @@ static int adv748x_remove(struct i2c_client *client) { struct adv748x_state *state = i2c_get_clientdata(client); + adv748x_dai_cleanup(&state->dai); adv748x_afe_cleanup(&state->afe); adv748x_hdmi_cleanup(&state->hdmi); diff --git a/drivers/media/i2c/adv748x/adv748x-dai.c b/drivers/media/i2c/adv748x/adv748x-dai.c new file mode 100644 index 000000000000..6fce7d000423 --- /dev/null +++ b/drivers/media/i2c/adv748x/adv748x-dai.c @@ -0,0 +1,265 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Analog Devices ADV748X HDMI receiver with AFE + * The implementation of DAI. + */ + +#include "adv748x.h" + +#include <linux/clk.h> +#include <linux/clk-provider.h> +#include <sound/pcm_params.h> + +#define state_of(soc_dai) \ + adv748x_dai_to_state(container_of((soc_dai)->driver, \ + struct adv748x_dai, \ + drv)) + +static const char ADV748X_DAI_NAME[] = "adv748x-i2s"; + +static int set_audio_pads_state(struct adv748x_state *state, int on) +{ + return io_clrset(state, ADV748X_IO_PAD_CONTROLS, + ADV748X_IO_PAD_CONTROLS_TRI_AUD | + ADV748X_IO_PAD_CONTROLS_PDN_AUD, + on ? 0 : 0xff); +} + +static int set_dpll_mclk_fs(struct adv748x_state *state, int fs) +{ + return dpll_clrset(state, ADV748X_DPLL_MCLK_FS, + ADV748X_DPLL_MCLK_FS_N_MASK, (fs / 128) - 1); +} + +static int set_i2s_format(struct adv748x_state *state, uint outmode, + uint bitwidth) +{ + return hdmi_clrset(state, ADV748X_HDMI_I2S, + ADV748X_HDMI_I2SBITWIDTH_MASK | + ADV748X_HDMI_I2SOUTMODE_MASK, + (outmode << ADV748X_HDMI_I2SOUTMODE_SHIFT) | + bitwidth); +} + +static int set_i2s_tdm_mode(struct adv748x_state *state, int is_tdm) +{ + int ret; + + ret = hdmi_clrset(state, ADV748X_HDMI_AUDIO_MUTE_SPEED, + ADV748X_MAN_AUDIO_DL_BYPASS | + ADV748X_AUDIO_DELAY_LINE_BYPASS, + is_tdm ? 0xff : 0); + if (ret < 0) + return ret; + ret = hdmi_clrset(state, ADV748X_HDMI_REG_6D, + ADV748X_I2S_TDM_MODE_ENABLE, + is_tdm ? 0xff : 0); + return ret; +} + +static int set_audio_mute(struct adv748x_state *state, int enable) +{ + return hdmi_clrset(state, ADV748X_HDMI_MUTE_CTRL, + ADV748X_HDMI_MUTE_CTRL_MUTE_AUDIO, + enable ? 0xff : 0); +} + +static int adv748x_dai_set_sysclk(struct snd_soc_dai *dai, + int clk_id, unsigned int freq, int dir) +{ + struct adv748x_state *state = state_of(dai); + + /* currently supporting only one fixed rate clock */ + if (clk_id != 0 || freq != clk_get_rate(state->dai.mclk)) { + dev_err(dai->dev, "invalid clock (%d) or frequency (%u, dir %d)\n", + clk_id, freq, dir); + return -EINVAL; + } + state->dai.freq = freq; + return 0; +} + +static int adv748x_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct adv748x_state *state = state_of(dai); + int ret = 0; + + if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBM_CFM) { + dev_err(dai->dev, "only I2S master clock mode supported\n"); + ret = -EINVAL; + goto done; + } + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAI_FORMAT_I2S: + state->dai.tdm = 0; + state->dai.fmt = ADV748X_I2SOUTMODE_I2S; + break; + case SND_SOC_DAI_FORMAT_RIGHT_J: + state->dai.tdm = 1; + state->dai.fmt = ADV748X_I2SOUTMODE_RIGHT_J; + break; + case SND_SOC_DAI_FORMAT_LEFT_J: + state->dai.tdm = 1; + state->dai.fmt = ADV748X_I2SOUTMODE_LEFT_J; + break; + default: + dev_err(dai->dev, "only i2s, left_j and right_j supported\n"); + ret = -EINVAL; + goto done; + } + if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) { + dev_err(dai->dev, "only normal bit clock + frame supported\n"); + ret = -EINVAL; + } +done: + return ret; +} + +static int adv748x_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai) +{ + struct adv748x_state *state = state_of(dai); + + if (sub->stream != SNDRV_PCM_STREAM_CAPTURE) + return -EINVAL; + return set_audio_pads_state(state, 1); +} + +static int adv748x_dai_hw_params(struct snd_pcm_substream *sub, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + int ret; + struct adv748x_state *state = state_of(dai); + uint fs = state->dai.freq / params_rate(params); + + dev_dbg(dai->dev, "dai %s substream %s rate=%u (fs=%u), channels=%u sample width=%u(%u)\n", + dai->name, sub->name, + params_rate(params), fs, + params_channels(params), + params_width(params), + params_physical_width(params)); + switch (fs) { + case 128: + case 256: + case 384: + case 512: + case 640: + case 768: + break; + default: + ret = -EINVAL; + dev_err(dai->dev, "invalid clock frequency (%u) or rate (%u)\n", + state->dai.freq, params_rate(params)); + goto done; + } + ret = set_dpll_mclk_fs(state, fs); + if (ret) + goto done; + ret = set_i2s_tdm_mode(state, state->dai.tdm); + if (ret) + goto done; + ret = set_i2s_format(state, state->dai.fmt, params_width(params)); +done: + return ret; +} + +static int adv748x_dai_mute_stream(struct snd_soc_dai *dai, int mute, int dir) +{ + struct adv748x_state *state = state_of(dai); + + return set_audio_mute(state, mute); +} + +static void adv748x_dai_shutdown(struct snd_pcm_substream *sub, struct snd_soc_dai *dai) +{ + struct adv748x_state *state = state_of(dai); + + set_audio_pads_state(state, 0); +} + +static const struct snd_soc_dai_ops adv748x_dai_ops = { + .set_sysclk = adv748x_dai_set_sysclk, + .set_fmt = adv748x_dai_set_fmt, + .startup = adv748x_dai_startup, + .hw_params = adv748x_dai_hw_params, + .mute_stream = adv748x_dai_mute_stream, + .shutdown = adv748x_dai_shutdown, +}; + +static int adv748x_of_xlate_dai_name(struct snd_soc_component *component, + struct of_phandle_args *args, + const char **dai_name) +{ + if (dai_name) + *dai_name = ADV748X_DAI_NAME; + return 0; +} + +static const struct snd_soc_component_driver adv748x_codec = { + .of_xlate_dai_name = adv748x_of_xlate_dai_name, +}; + +int adv748x_dai_init(struct adv748x_dai *dai) +{ + int ret; + struct adv748x_state *state = adv748x_dai_to_state(dai); + + dai->mclk_name = kasprintf(GFP_KERNEL, "%s.%s-i2s-mclk", + state->dev->driver->name, + dev_name(state->dev)); + if (!dai->mclk_name) { + ret = -ENOMEM; + adv_err(state, "No memory for MCLK\n"); + goto fail; + } + dai->mclk = clk_register_fixed_rate(state->dev, + dai->mclk_name, + NULL /* parent_name */, + 0 /* flags */, + 12288000 /* rate */); + if (IS_ERR_OR_NULL(dai->mclk)) { + ret = PTR_ERR(dai->mclk); + adv_err(state, "Failed to register MCLK (%d)\n", ret); + goto fail; + } + ret = of_clk_add_provider(state->dev->of_node, of_clk_src_simple_get, + dai->mclk); + if (ret < 0) { + adv_err(state, "Failed to add MCLK provider (%d)\n", ret); + goto unreg_mclk; + } + dai->drv.name = ADV748X_DAI_NAME; + dai->drv.ops = &adv748x_dai_ops; + dai->drv.capture = (struct snd_soc_pcm_stream){ + .stream_name = "Capture", + .channels_min = 8, + .channels_max = 8, + .rates = SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_U24_LE, + }; + + ret = devm_snd_soc_register_component(state->dev, &adv748x_codec, + &dai->drv, 1); + if (ret < 0) { + adv_err(state, "Failed to register the codec (%d)\n", ret); + goto cleanup_mclk; + } + return 0; + +cleanup_mclk: + of_clk_del_provider(state->dev->of_node); +unreg_mclk: + clk_unregister_fixed_rate(dai->mclk); +fail: + return ret; +} + +void adv748x_dai_cleanup(struct adv748x_dai *dai) +{ + struct adv748x_state *state = adv748x_dai_to_state(dai); + + of_clk_del_provider(state->dev->of_node); + clk_unregister_fixed_rate(dai->mclk); + kfree(dai->mclk_name); +} + diff --git a/drivers/media/i2c/adv748x/adv748x.h b/drivers/media/i2c/adv748x/adv748x.h index 1a1ea70086c6..b0735de0ced5 100644 --- a/drivers/media/i2c/adv748x/adv748x.h +++ b/drivers/media/i2c/adv748x/adv748x.h @@ -19,6 +19,7 @@ */ #include <linux/i2c.h> +#include <sound/soc.h> #include <media/v4l2-ctrls.h> #include <media/v4l2-device.h> @@ -63,7 +64,8 @@ enum adv748x_ports { ADV748X_PORT_TTL = 9, ADV748X_PORT_TXA = 10, ADV748X_PORT_TXB = 11, - ADV748X_PORT_MAX = 12, + ADV748X_PORT_I2S = 12, + ADV748X_PORT_MAX = 13, }; enum adv748x_csi2_pads { @@ -166,6 +168,13 @@ struct adv748x_afe { container_of(ctrl->handler, struct adv748x_afe, ctrl_hdl) #define adv748x_sd_to_afe(sd) container_of(sd, struct adv748x_afe, sd) +struct adv748x_dai { + struct snd_soc_dai_driver drv; + struct clk *mclk; + char *mclk_name; + unsigned int freq, fmt, tdm; +}; + /** * struct adv748x_state - State of ADV748X * @dev: (OF) device @@ -182,6 +191,7 @@ struct adv748x_afe { * @afe: state of AFE receiver context * @txa: state of TXA transmitter context * @txb: state of TXB transmitter context + * @mclk: MCLK clock of the I2S port */ struct adv748x_state { struct device *dev; @@ -197,10 +207,12 @@ struct adv748x_state { struct adv748x_afe afe; struct adv748x_csi2 txa; struct adv748x_csi2 txb; + struct adv748x_dai dai; }; #define adv748x_hdmi_to_state(h) container_of(h, struct adv748x_state, hdmi) #define adv748x_afe_to_state(a) container_of(a, struct adv748x_state, afe) +#define adv748x_dai_to_state(p) container_of(p, struct adv748x_state, dai) #define adv_err(a, fmt, arg...) dev_err(a->dev, fmt, ##arg) #define adv_info(a, fmt, arg...) dev_info(a->dev, fmt, ##arg) @@ -484,4 +496,7 @@ int adv748x_csi2_set_pixelrate(struct v4l2_subdev *sd, s64 rate); int adv748x_hdmi_init(struct adv748x_hdmi *hdmi); void adv748x_hdmi_cleanup(struct adv748x_hdmi *hdmi); +int adv748x_dai_init(struct adv748x_dai *); +void adv748x_dai_cleanup(struct adv748x_dai *); + #endif /* _ADV748X_H_ */ -- 2.25.1.25.g9ecbe7eb18 _______________________________________________ devel mailing list de...@linuxdriverproject.org http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel