The patch

ASoC: img: Add driver for Pistachio internal DAC

has been applied to the asoc tree at

git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git

All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying to this mail.

Thanks, Mark

From 395036225390a940cba7cec5c2306a6999d13d94 Mon Sep 17 00:00:00 2001

From: "Damien.Horsley" Damien.Horsley@imgtec.com Date: Thu, 10 Dec 2015 14:40:12 +0000 Subject: [PATCH] ASoC: img: Add driver for Pistachio internal DAC

Add driver for Pistachio Internal DAC

Signed-off-by: Damien.Horsley Damien.Horsley@imgtec.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/img/Kconfig | 8 + sound/soc/img/Makefile | 2 + sound/soc/img/pistachio-internal-dac.c | 287 +++++++++++++++++++++++++++++++++ 3 files changed, 297 insertions(+) create mode 100644 sound/soc/img/pistachio-internal-dac.c

diff --git a/sound/soc/img/Kconfig b/sound/soc/img/Kconfig index d08537e..857a951 100644 --- a/sound/soc/img/Kconfig +++ b/sound/soc/img/Kconfig @@ -42,3 +42,11 @@ config SND_SOC_IMG_SPDIF_OUT help Say Y or M if you want to add support for SPDIF out driver for Imagination Technologies SPDIF out device. + + +config SND_SOC_IMG_PISTACHIO_INTERNAL_DAC + tristate "Support for Pistachio SoC Internal DAC Driver" + depends on SND_SOC_IMG + help + Say Y or M if you want to add support for Pistachio internal DAC + driver for Imagination Technologies Pistachio internal DAC device. diff --git a/sound/soc/img/Makefile b/sound/soc/img/Makefile index 1a44fb4..0508c1c 100644 --- a/sound/soc/img/Makefile +++ b/sound/soc/img/Makefile @@ -3,3 +3,5 @@ obj-$(CONFIG_SND_SOC_IMG_I2S_OUT) += img-i2s-out.o obj-$(CONFIG_SND_SOC_IMG_PARALLEL_OUT) += img-parallel-out.o obj-$(CONFIG_SND_SOC_IMG_SPDIF_IN) += img-spdif-in.o obj-$(CONFIG_SND_SOC_IMG_SPDIF_OUT) += img-spdif-out.o + +obj-$(CONFIG_SND_SOC_IMG_PISTACHIO_INTERNAL_DAC) += pistachio-internal-dac.o diff --git a/sound/soc/img/pistachio-internal-dac.c b/sound/soc/img/pistachio-internal-dac.c new file mode 100644 index 0000000..162a0fd --- /dev/null +++ b/sound/soc/img/pistachio-internal-dac.c @@ -0,0 +1,287 @@ +/* + * Pistachio internal dac driver + * + * Copyright (C) 2015 Imagination Technologies Ltd. + * + * Author: Damien Horsley Damien.Horsley@imgtec.com + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/mfd/syscon.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> + +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#define PISTACHIO_INTERNAL_DAC_CTRL 0x40 +#define PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK 0x2 +#define PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK 0x1 + +#define PISTACHIO_INTERNAL_DAC_SRST 0x44 +#define PISTACHIO_INTERNAL_DAC_SRST_MASK 0x1 + +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL 0x48 +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT 0 +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK 0xFFF +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK 0x1000 +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT 13 +#define PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK 0x1FE000 + +#define PISTACHIO_INTERNAL_DAC_PWR 0x1 +#define PISTACHIO_INTERNAL_DAC_PWR_MASK 0x1 + +#define PISTACHIO_INTERNAL_DAC_FORMATS (SNDRV_PCM_FMTBIT_S24_LE | \ + SNDRV_PCM_FMTBIT_S32_LE) + +/* codec private data */ +struct pistachio_internal_dac { + struct regmap *regmap; + struct regulator *supply; + bool mute; +}; + +static const struct snd_kcontrol_new pistachio_internal_dac_snd_controls[] = { + SOC_SINGLE("Playback Switch", PISTACHIO_INTERNAL_DAC_CTRL, 2, 1, 1) +}; + +static const struct snd_soc_dapm_widget pistachio_internal_dac_widgets[] = { + SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), + SND_SOC_DAPM_OUTPUT("AOUTL"), + SND_SOC_DAPM_OUTPUT("AOUTR"), +}; + +static const struct snd_soc_dapm_route pistachio_internal_dac_routes[] = { + { "AOUTL", NULL, "DAC" }, + { "AOUTR", NULL, "DAC" }, +}; + +static void pistachio_internal_dac_reg_writel(struct regmap *top_regs, + u32 val, u32 reg) +{ + regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, + PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_MASK, + reg << PISTACHIO_INTERNAL_DAC_GTI_CTRL_ADDR_SHIFT); + + regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, + PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_MASK, + val << PISTACHIO_INTERNAL_DAC_GTI_CTRL_WDATA_SHIFT); + + regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, + PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, + PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK); + + regmap_update_bits(top_regs, PISTACHIO_INTERNAL_DAC_GTI_CTRL, + PISTACHIO_INTERNAL_DAC_GTI_CTRL_WE_MASK, 0); +} + +static void pistachio_internal_dac_pwr_off(struct pistachio_internal_dac *dac) +{ + regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, + PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, + PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK); + + pistachio_internal_dac_reg_writel(dac->regmap, 0, + PISTACHIO_INTERNAL_DAC_PWR); +} + +static void pistachio_internal_dac_pwr_on(struct pistachio_internal_dac *dac) +{ + regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, + PISTACHIO_INTERNAL_DAC_SRST_MASK, + PISTACHIO_INTERNAL_DAC_SRST_MASK); + + regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_SRST, + PISTACHIO_INTERNAL_DAC_SRST_MASK, 0); + + pistachio_internal_dac_reg_writel(dac->regmap, + PISTACHIO_INTERNAL_DAC_PWR_MASK, + PISTACHIO_INTERNAL_DAC_PWR); + + regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, + PISTACHIO_INTERNAL_DAC_CTRL_PWRDN_MASK, 0); +} + +static struct snd_soc_dai_driver pistachio_internal_dac_dais[] = { + { + .name = "pistachio_internal_dac", + .playback = { + .stream_name = "Playback", + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = PISTACHIO_INTERNAL_DAC_FORMATS, + } + }, +}; + +static int pistachio_internal_dac_codec_probe(struct snd_soc_codec *codec) +{ + struct pistachio_internal_dac *dac = snd_soc_codec_get_drvdata(codec); + + snd_soc_codec_init_regmap(codec, dac->regmap); + + return 0; +} + +static const struct snd_soc_codec_driver pistachio_internal_dac_driver = { + .probe = pistachio_internal_dac_codec_probe, + .idle_bias_off = true, + .controls = pistachio_internal_dac_snd_controls, + .num_controls = ARRAY_SIZE(pistachio_internal_dac_snd_controls), + .dapm_widgets = pistachio_internal_dac_widgets, + .num_dapm_widgets = ARRAY_SIZE(pistachio_internal_dac_widgets), + .dapm_routes = pistachio_internal_dac_routes, + .num_dapm_routes = ARRAY_SIZE(pistachio_internal_dac_routes), +}; + +static int pistachio_internal_dac_probe(struct platform_device *pdev) +{ + struct pistachio_internal_dac *dac; + int ret, voltage; + struct device *dev = &pdev->dev; + u32 reg; + + dac = devm_kzalloc(dev, sizeof(*dac), GFP_KERNEL); + + if (!dac) + return -ENOMEM; + + platform_set_drvdata(pdev, dac); + + dac->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, + "img,cr-top"); + if (IS_ERR(dac->regmap)) + return PTR_ERR(dac->regmap); + + dac->supply = devm_regulator_get(dev, "VDD"); + if (IS_ERR(dac->supply)) { + ret = PTR_ERR(dac->supply); + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to acquire supply 'VDD-supply': %d\n", ret); + return ret; + } + + ret = regulator_enable(dac->supply); + if (ret) { + dev_err(dev, "failed to enable supply: %d\n", ret); + return ret; + } + + voltage = regulator_get_voltage(dac->supply); + + switch (voltage) { + case 1800000: + reg = 0; + break; + case 3300000: + reg = PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK; + break; + default: + dev_err(dev, "invalid voltage: %d\n", voltage); + ret = -EINVAL; + goto err_regulator; + } + + regmap_update_bits(dac->regmap, PISTACHIO_INTERNAL_DAC_CTRL, + PISTACHIO_INTERNAL_DAC_CTRL_PWR_SEL_MASK, reg); + + pistachio_internal_dac_pwr_off(dac); + pistachio_internal_dac_pwr_on(dac); + + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + pm_runtime_idle(dev); + + ret = snd_soc_register_codec(dev, &pistachio_internal_dac_driver, + pistachio_internal_dac_dais, + ARRAY_SIZE(pistachio_internal_dac_dais)); + if (ret) { + dev_err(dev, "failed to register codec: %d\n", ret); + goto err_pwr; + } + + return 0; + +err_pwr: + pm_runtime_disable(&pdev->dev); + pistachio_internal_dac_pwr_off(dac); +err_regulator: + regulator_disable(dac->supply); + + return ret; +} + +static int pistachio_internal_dac_remove(struct platform_device *pdev) +{ + struct pistachio_internal_dac *dac = dev_get_drvdata(&pdev->dev); + + snd_soc_unregister_codec(&pdev->dev); + pm_runtime_disable(&pdev->dev); + pistachio_internal_dac_pwr_off(dac); + regulator_disable(dac->supply); + + return 0; +} + +#ifdef CONFIG_PM +static int pistachio_internal_dac_rt_resume(struct device *dev) +{ + struct pistachio_internal_dac *dac = dev_get_drvdata(dev); + int ret; + + ret = regulator_enable(dac->supply); + if (ret) { + dev_err(dev, "failed to enable supply: %d\n", ret); + return ret; + } + + pistachio_internal_dac_pwr_on(dac); + + return 0; +} + +static int pistachio_internal_dac_rt_suspend(struct device *dev) +{ + struct pistachio_internal_dac *dac = dev_get_drvdata(dev); + + pistachio_internal_dac_pwr_off(dac); + + regulator_disable(dac->supply); + + return 0; +} +#endif + +static const struct dev_pm_ops pistachio_internal_dac_pm_ops = { + SET_RUNTIME_PM_OPS(pistachio_internal_dac_rt_suspend, + pistachio_internal_dac_rt_resume, NULL) +}; + +static const struct of_device_id pistachio_internal_dac_of_match[] = { + { .compatible = "img,pistachio-internal-dac" }, + {} +}; +MODULE_DEVICE_TABLE(of, pistachio_internal_dac_of_match); + +static struct platform_driver pistachio_internal_dac_plat_driver = { + .driver = { + .name = "img-pistachio-internal-dac", + .of_match_table = pistachio_internal_dac_of_match, + .pm = &pistachio_internal_dac_pm_ops + }, + .probe = pistachio_internal_dac_probe, + .remove = pistachio_internal_dac_remove +}; +module_platform_driver(pistachio_internal_dac_plat_driver); + +MODULE_DESCRIPTION("Pistachio Internal DAC driver"); +MODULE_AUTHOR("Damien Horsley Damien.Horsley@imgtec.com"); +MODULE_LICENSE("GPL v2");