diff options
Diffstat (limited to 'sound/soc/atmel/tse850-pcm5142.c')
| -rw-r--r-- | sound/soc/atmel/tse850-pcm5142.c | 444 |
1 files changed, 444 insertions, 0 deletions
diff --git a/sound/soc/atmel/tse850-pcm5142.c b/sound/soc/atmel/tse850-pcm5142.c new file mode 100644 index 000000000..c809b1210 --- /dev/null +++ b/sound/soc/atmel/tse850-pcm5142.c @@ -0,0 +1,444 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// TSE-850 audio - ASoC driver for the Axentia TSE-850 with a PCM5142 codec +// +// Copyright (C) 2016 Axentia Technologies AB +// +// Author: Peter Rosin <peda@axentia.se> +// +// loop1 relays +// IN1 +---o +------------+ o---+ OUT1 +// \ / +// + + +// | / | +// +--o +--. | +// | add | | +// | V | +// | .---. | +// DAC +----------->|Sum|---+ +// | '---' | +// | | +// + + +// +// IN2 +---o--+------------+--o---+ OUT2 +// loop2 relays +// +// The 'loop1' gpio pin controls two relays, which are either in loop +// position, meaning that input and output are directly connected, or +// they are in mixer position, meaning that the signal is passed through +// the 'Sum' mixer. Similarly for 'loop2'. +// +// In the above, the 'loop1' relays are inactive, thus feeding IN1 to the +// mixer (if 'add' is active) and feeding the mixer output to OUT1. The +// 'loop2' relays are active, short-cutting the TSE-850 from channel 2. +// IN1, IN2, OUT1 and OUT2 are TSE-850 connectors and DAC is the PCB name +// of the (filtered) output from the PCM5142 codec. + +#include <linux/clk.h> +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/regulator/consumer.h> + +#include <sound/soc.h> +#include <sound/pcm_params.h> + +struct tse850_priv { + struct gpio_desc *add; + struct gpio_desc *loop1; + struct gpio_desc *loop2; + + struct regulator *ana; + + int add_cache; + int loop1_cache; + int loop2_cache; +}; + +static int tse850_get_mux1(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + + ucontrol->value.enumerated.item[0] = tse850->loop1_cache; + + return 0; +} + +static int tse850_put_mux1(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + struct soc_enum *e = (struct soc_enum *)kctrl->private_value; + unsigned int val = ucontrol->value.enumerated.item[0]; + + if (val >= e->items) + return -EINVAL; + + gpiod_set_value_cansleep(tse850->loop1, val); + tse850->loop1_cache = val; + + return snd_soc_dapm_put_enum_double(kctrl, ucontrol); +} + +static int tse850_get_mux2(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + + ucontrol->value.enumerated.item[0] = tse850->loop2_cache; + + return 0; +} + +static int tse850_put_mux2(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + struct soc_enum *e = (struct soc_enum *)kctrl->private_value; + unsigned int val = ucontrol->value.enumerated.item[0]; + + if (val >= e->items) + return -EINVAL; + + gpiod_set_value_cansleep(tse850->loop2, val); + tse850->loop2_cache = val; + + return snd_soc_dapm_put_enum_double(kctrl, ucontrol); +} + +static int tse850_get_mix(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + + ucontrol->value.enumerated.item[0] = tse850->add_cache; + + return 0; +} + +static int tse850_put_mix(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + int connect = !!ucontrol->value.integer.value[0]; + + if (tse850->add_cache == connect) + return 0; + + /* + * Hmmm, this gpiod_set_value_cansleep call should probably happen + * inside snd_soc_dapm_mixer_update_power in the loop. + */ + gpiod_set_value_cansleep(tse850->add, connect); + tse850->add_cache = connect; + + snd_soc_dapm_mixer_update_power(dapm, kctrl, connect, NULL); + return 1; +} + +static int tse850_get_ana(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + int ret; + + ret = regulator_get_voltage(tse850->ana); + if (ret < 0) + return ret; + + /* + * Map regulator output values like so: + * -11.5V to "Low" (enum 0) + * 11.5V-12.5V to "12V" (enum 1) + * 12.5V-13.5V to "13V" (enum 2) + * ... + * 18.5V-19.5V to "19V" (enum 8) + * 19.5V- to "20V" (enum 9) + */ + if (ret < 11000000) + ret = 11000000; + else if (ret > 20000000) + ret = 20000000; + ret -= 11000000; + ret = (ret + 500000) / 1000000; + + ucontrol->value.enumerated.item[0] = ret; + + return 0; +} + +static int tse850_put_ana(struct snd_kcontrol *kctrl, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_dapm_context *dapm = snd_soc_dapm_kcontrol_dapm(kctrl); + struct snd_soc_card *card = dapm->card; + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + struct soc_enum *e = (struct soc_enum *)kctrl->private_value; + unsigned int uV = ucontrol->value.enumerated.item[0]; + int ret; + + if (uV >= e->items) + return -EINVAL; + + /* + * Map enum zero (Low) to 2 volts on the regulator, do this since + * the ana regulator is supplied by the system 12V voltage and + * requesting anything below the system voltage causes the system + * voltage to be passed through the regulator. Also, the ana + * regulator induces noise when requesting voltages near the + * system voltage. So, by mapping Low to 2V, that noise is + * eliminated when all that is needed is 12V (the system voltage). + */ + if (uV) + uV = 11000000 + (1000000 * uV); + else + uV = 2000000; + + ret = regulator_set_voltage(tse850->ana, uV, uV); + if (ret < 0) + return ret; + + return snd_soc_dapm_put_enum_double(kctrl, ucontrol); +} + +static const char * const mux_text[] = { "Mixer", "Loop" }; + +static const struct soc_enum mux_enum = + SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(mux_text), mux_text); + +static const struct snd_kcontrol_new mux1 = + SOC_DAPM_ENUM_EXT("MUX1", mux_enum, tse850_get_mux1, tse850_put_mux1); + +static const struct snd_kcontrol_new mux2 = + SOC_DAPM_ENUM_EXT("MUX2", mux_enum, tse850_get_mux2, tse850_put_mux2); + +#define TSE850_DAPM_SINGLE_EXT(xname, reg, shift, max, invert, xget, xput) \ +{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \ + .info = snd_soc_info_volsw, \ + .get = xget, \ + .put = xput, \ + .private_value = SOC_SINGLE_VALUE(reg, shift, max, invert, 0) } + +static const struct snd_kcontrol_new mix[] = { + TSE850_DAPM_SINGLE_EXT("IN Switch", SND_SOC_NOPM, 0, 1, 0, + tse850_get_mix, tse850_put_mix), +}; + +static const char * const ana_text[] = { + "Low", "12V", "13V", "14V", "15V", "16V", "17V", "18V", "19V", "20V" +}; + +static const struct soc_enum ana_enum = + SOC_ENUM_SINGLE(SND_SOC_NOPM, 0, ARRAY_SIZE(ana_text), ana_text); + +static const struct snd_kcontrol_new out = + SOC_DAPM_ENUM_EXT("ANA", ana_enum, tse850_get_ana, tse850_put_ana); + +static const struct snd_soc_dapm_widget tse850_dapm_widgets[] = { + SND_SOC_DAPM_LINE("OUT1", NULL), + SND_SOC_DAPM_LINE("OUT2", NULL), + SND_SOC_DAPM_LINE("IN1", NULL), + SND_SOC_DAPM_LINE("IN2", NULL), + SND_SOC_DAPM_INPUT("DAC"), + SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0), + SOC_MIXER_ARRAY("MIX", SND_SOC_NOPM, 0, 0, mix), + SND_SOC_DAPM_MUX("MUX1", SND_SOC_NOPM, 0, 0, &mux1), + SND_SOC_DAPM_MUX("MUX2", SND_SOC_NOPM, 0, 0, &mux2), + SND_SOC_DAPM_OUT_DRV("OUT", SND_SOC_NOPM, 0, 0, &out, 1), +}; + +/* + * These connections are not entirely correct, since both IN1 and IN2 + * are always fed to MIX (if the "IN switch" is set so), i.e. without + * regard to the loop1 and loop2 relays that according to this only + * control MUX1 and MUX2 but in fact also control how the input signals + * are routed. + * But, 1) I don't know how to do it right, and 2) it doesn't seem to + * matter in practice since nothing is powered in those sections anyway. + */ +static const struct snd_soc_dapm_route tse850_intercon[] = { + { "OUT1", NULL, "MUX1" }, + { "OUT2", NULL, "MUX2" }, + + { "MUX1", "Loop", "IN1" }, + { "MUX1", "Mixer", "OUT" }, + + { "MUX2", "Loop", "IN2" }, + { "MUX2", "Mixer", "OUT" }, + + { "OUT", NULL, "MIX" }, + + { "MIX", NULL, "DAC" }, + { "MIX", "IN Switch", "IN1" }, + { "MIX", "IN Switch", "IN2" }, + + /* connect board input to the codec left channel output pin */ + { "DAC", NULL, "OUTL" }, +}; + +SND_SOC_DAILINK_DEFS(pcm, + DAILINK_COMP_ARRAY(COMP_EMPTY()), + DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "pcm512x-hifi")), + DAILINK_COMP_ARRAY(COMP_EMPTY())); + +static struct snd_soc_dai_link tse850_dailink = { + .name = "TSE-850", + .stream_name = "TSE-850-PCM", + .dai_fmt = SND_SOC_DAIFMT_I2S + | SND_SOC_DAIFMT_NB_NF + | SND_SOC_DAIFMT_CBP_CFC, + SND_SOC_DAILINK_REG(pcm), +}; + +static struct snd_soc_card tse850_card = { + .name = "TSE-850-ASoC", + .owner = THIS_MODULE, + .dai_link = &tse850_dailink, + .num_links = 1, + .dapm_widgets = tse850_dapm_widgets, + .num_dapm_widgets = ARRAY_SIZE(tse850_dapm_widgets), + .dapm_routes = tse850_intercon, + .num_dapm_routes = ARRAY_SIZE(tse850_intercon), + .fully_routed = true, +}; + +static int tse850_dt_init(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + struct device_node *codec_np, *cpu_np; + struct snd_soc_dai_link *dailink = &tse850_dailink; + + if (!np) { + dev_err(&pdev->dev, "only device tree supported\n"); + return -EINVAL; + } + + cpu_np = of_parse_phandle(np, "axentia,cpu-dai", 0); + if (!cpu_np) { + dev_err(&pdev->dev, "failed to get cpu dai\n"); + return -EINVAL; + } + dailink->cpus->of_node = cpu_np; + dailink->platforms->of_node = cpu_np; + of_node_put(cpu_np); + + codec_np = of_parse_phandle(np, "axentia,audio-codec", 0); + if (!codec_np) { + dev_err(&pdev->dev, "failed to get codec info\n"); + return -EINVAL; + } + dailink->codecs->of_node = codec_np; + of_node_put(codec_np); + + return 0; +} + +static int tse850_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &tse850_card; + struct device *dev = card->dev = &pdev->dev; + struct tse850_priv *tse850; + int ret; + + tse850 = devm_kzalloc(dev, sizeof(*tse850), GFP_KERNEL); + if (!tse850) + return -ENOMEM; + + snd_soc_card_set_drvdata(card, tse850); + + ret = tse850_dt_init(pdev); + if (ret) { + dev_err(dev, "failed to init dt info\n"); + return ret; + } + + tse850->add = devm_gpiod_get(dev, "axentia,add", GPIOD_OUT_HIGH); + if (IS_ERR(tse850->add)) + return dev_err_probe(dev, PTR_ERR(tse850->add), + "failed to get 'add' gpio\n"); + tse850->add_cache = 1; + + tse850->loop1 = devm_gpiod_get(dev, "axentia,loop1", GPIOD_OUT_HIGH); + if (IS_ERR(tse850->loop1)) + return dev_err_probe(dev, PTR_ERR(tse850->loop1), + "failed to get 'loop1' gpio\n"); + tse850->loop1_cache = 1; + + tse850->loop2 = devm_gpiod_get(dev, "axentia,loop2", GPIOD_OUT_HIGH); + if (IS_ERR(tse850->loop2)) + return dev_err_probe(dev, PTR_ERR(tse850->loop2), + "failed to get 'loop2' gpio\n"); + tse850->loop2_cache = 1; + + tse850->ana = devm_regulator_get(dev, "axentia,ana"); + if (IS_ERR(tse850->ana)) + return dev_err_probe(dev, PTR_ERR(tse850->ana), + "failed to get 'ana' regulator\n"); + + ret = regulator_enable(tse850->ana); + if (ret < 0) { + dev_err(dev, "failed to enable the 'ana' regulator\n"); + return ret; + } + + ret = snd_soc_register_card(card); + if (ret) { + dev_err(dev, "snd_soc_register_card failed\n"); + goto err_disable_ana; + } + + return 0; + +err_disable_ana: + regulator_disable(tse850->ana); + return ret; +} + +static void tse850_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + struct tse850_priv *tse850 = snd_soc_card_get_drvdata(card); + + snd_soc_unregister_card(card); + regulator_disable(tse850->ana); +} + +static const struct of_device_id tse850_dt_ids[] = { + { .compatible = "axentia,tse850-pcm5142", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, tse850_dt_ids); + +static struct platform_driver tse850_driver = { + .driver = { + .name = "axentia-tse850-pcm5142", + .of_match_table = tse850_dt_ids, + }, + .probe = tse850_probe, + .remove_new = tse850_remove, +}; + +module_platform_driver(tse850_driver); + +/* Module information */ +MODULE_AUTHOR("Peter Rosin <peda@axentia.se>"); +MODULE_DESCRIPTION("ALSA SoC driver for TSE-850 with PCM5142 codec"); +MODULE_LICENSE("GPL v2"); |