This patch adds CPU DAI driver for UniPhier AIO audio sound system.
This module provides PCM devices for all input/output port of AIO such as I2S, S/PDIF.
Signed-off-by: Katsuhiro Suzuki suzuki.katsuhiro@socionext.com
---
Changes in v2: - Change license comment style to C++ from C - Add error checks - Fix typo in error messages - Expose MCLK clock and PLL settings to user - Validate parameters in hw_params() - Fix missing checks for return value --- sound/soc/uniphier/Makefile | 2 +- sound/soc/uniphier/aio-cpu.c | 570 +++++++++++++++++++++++++++++++++++++++++++ sound/soc/uniphier/aio.h | 9 + 3 files changed, 580 insertions(+), 1 deletion(-) create mode 100644 sound/soc/uniphier/aio-cpu.c
diff --git a/sound/soc/uniphier/Makefile b/sound/soc/uniphier/Makefile index 9efe0feffdc2..3ef2784b2383 100644 --- a/sound/soc/uniphier/Makefile +++ b/sound/soc/uniphier/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -snd-soc-uniphier-aio-cpu-objs := aio-core.o aio-dma.o +snd-soc-uniphier-aio-cpu-objs := aio-core.o aio-dma.o aio-cpu.o
obj-$(CONFIG_SND_SOC_UNIPHIER_AIO) += snd-soc-uniphier-aio-cpu.o
diff --git a/sound/soc/uniphier/aio-cpu.c b/sound/soc/uniphier/aio-cpu.c new file mode 100644 index 000000000000..55f3248a31fd --- /dev/null +++ b/sound/soc/uniphier/aio-cpu.c @@ -0,0 +1,570 @@ +// SPDX-License-Identifier: GPL-2.0 +// +// Socionext UniPhier AIO ALSA CPU DAI driver. +// +// Copyright (c) 2016-2018 Socionext Inc. +// +// This program is free software; you can redistribute it and/or +// modify it under the terms of the GNU General Public License +// as published by the Free Software Foundation; version 2 +// of the License. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, see http://www.gnu.org/licenses/. + +#include <linux/clk.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> +#include <linux/reset.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> + +#include "aio.h" + +static bool is_valid_pll(struct uniphier_aio_chip *chip, int pll_id) +{ + struct device *dev = &chip->pdev->dev; + + if (pll_id < 0 || chip->num_plls <= pll_id) { + dev_err(dev, "PLL(%d) is not supported\n", pll_id); + return false; + } + + return chip->plls[pll_id].enable; +} + +static bool match_spec(const struct uniphier_aio_spec *spec, + const char *name, int dir) +{ + if (dir == SNDRV_PCM_STREAM_PLAYBACK && + spec->swm.dir != PORT_DIR_OUTPUT) { + return false; + } + + if (dir == SNDRV_PCM_STREAM_CAPTURE && + spec->swm.dir != PORT_DIR_INPUT) { + return false; + } + + if (spec->name && strcmp(spec->name, name) == 0) + return true; + + if (spec->gname && strcmp(spec->gname, name) == 0) + return true; + + return false; +} + +/** + * find_spec - find HW specification info by name + * @aio: the AIO device pointer + * @name: name of device + * @direction: the direction of substream, SNDRV_PCM_STREAM_* + * + * Find hardware specification information from list by device name. This + * information is used for telling the difference of SoCs to driver. + * + * Specification list is array of 'struct uniphier_aio_spec' which is defined + * in each drivers (see: aio-i2s.c). + * + * Return: The pointer of hardware specification of AIO if successful, + * otherwise NULL on error. + */ +static const struct uniphier_aio_spec *find_spec(struct uniphier_aio *aio, + const char *name, + int direction) +{ + const struct uniphier_aio_chip_spec *chip_spec = aio->chip->chip_spec; + int i; + + for (i = 0; i < chip_spec->num_specs; i++) { + const struct uniphier_aio_spec *spec = &chip_spec->specs[i]; + + if (match_spec(spec, name, direction)) + return spec; + } + + return NULL; +} + +/** + * find_divider - find clock divider by frequency + * @aio: the AIO device pointer + * @pll_id: PLL ID, should be AUD_PLL_XX + * @freq: required frequency + * + * Find suitable clock divider by frequency. + * + * Return: The ID of PLL if successful, otherwise negative error value. + */ +static int find_divider(struct uniphier_aio *aio, int pll_id, unsigned int freq) +{ + struct uniphier_aio_pll *pll; + int mul[] = { 1, 1, 1, 2, }; + int div[] = { 2, 3, 1, 3, }; + int i; + + if (!is_valid_pll(aio->chip, pll_id)) + return -EINVAL; + + pll = &aio->chip->plls[pll_id]; + for (i = 0; i < ARRAY_SIZE(mul); i++) + if (pll->freq * mul[i] / div[i] == freq) + return i; + + return -ENOTSUPP; +} + +static int uniphier_aio_set_sysclk(struct snd_soc_dai *dai, int clk_id, + unsigned int freq, int dir) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct device *dev = &aio->chip->pdev->dev; + bool pll_auto = false; + int pll_id, div_id; + + if (clk_id == AUD_CLK_IO) + return -ENOTSUPP; + + switch (clk_id) { + case AUD_CLK_IO: + return -ENOTSUPP; + case AUD_CLK_A1: + pll_id = AUD_PLL_A1; + break; + case AUD_CLK_F1: + pll_id = AUD_PLL_F1; + break; + case AUD_CLK_A2: + pll_id = AUD_PLL_A2; + break; + case AUD_CLK_F2: + pll_id = AUD_PLL_F2; + break; + case AUD_CLK_A: + pll_id = AUD_PLL_A1; + pll_auto = true; + break; + case AUD_CLK_F: + pll_id = AUD_PLL_F1; + pll_auto = true; + break; + case AUD_CLK_APLL: + pll_id = AUD_PLL_APLL; + break; + case AUD_CLK_RX0: + pll_id = AUD_PLL_RX0; + break; + case AUD_CLK_USB0: + pll_id = AUD_PLL_USB0; + break; + case AUD_CLK_HSC0: + pll_id = AUD_PLL_HSC0; + break; + default: + dev_err(dev, "Sysclk(%d) is not supported\n", clk_id); + return -EINVAL; + } + + if (pll_auto) { + for (pll_id = 0; pll_id < aio->chip->num_plls; pll_id++) { + div_id = find_divider(aio, pll_id, freq); + if (div_id >= 0) { + aio->plldiv = div_id; + break; + } + } + if (pll_id == aio->chip->num_plls) { + dev_err(dev, "Sysclk frequency is not supported(%d)\n", + freq); + return -EINVAL; + } + } + + if (dir == SND_SOC_CLOCK_OUT) + aio->pll_out = pll_id; + else + aio->pll_in = pll_id; + + return 0; +} + +static int uniphier_aio_set_pll(struct snd_soc_dai *dai, int pll_id, + int source, unsigned int freq_in, + unsigned int freq_out) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct device *dev = &aio->chip->pdev->dev; + int ret; + + if (!is_valid_pll(aio->chip, pll_id)) + return -EINVAL; + if (!aio->chip->plls[pll_id].enable) { + dev_err(dev, "PLL(%d) is not implemented\n", pll_id); + return -ENOTSUPP; + } + + ret = aio_chip_set_pll(aio->chip, pll_id, freq_out); + if (ret < 0) + return ret; + + return 0; +} + +static int uniphier_aio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct device *dev = &aio->chip->pdev->dev; + + switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { + case SND_SOC_DAIFMT_LEFT_J: + case SND_SOC_DAIFMT_RIGHT_J: + case SND_SOC_DAIFMT_I2S: + aio->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK; + break; + default: + dev_err(dev, "Format is not supported(%d)\n", + fmt & SND_SOC_DAIFMT_FORMAT_MASK); + return -EINVAL; + } + + return 0; +} + +static int uniphier_aio_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct uniphier_aio_sub *sub = &aio->sub[substream->stream]; + int ret; + + sub->substream = substream; + sub->pass_through = 0; + sub->use_mmap = true; + + ret = aio_init(sub); + if (ret) + return ret; + + return 0; +} + +static void uniphier_aio_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct uniphier_aio_sub *sub = &aio->sub[substream->stream]; + + sub->substream = NULL; +} + +static int uniphier_aio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct uniphier_aio_sub *sub = &aio->sub[substream->stream]; + struct device *dev = &aio->chip->pdev->dev; + int freq, ret; + + switch (params_rate(params)) { + case 48000: + case 32000: + case 24000: + freq = 12288000; + break; + case 44100: + case 22050: + freq = 11289600; + break; + default: + dev_err(dev, "Rate is not supported(%d)\n", + params_rate(params)); + return -EINVAL; + } + ret = snd_soc_dai_set_sysclk(dai, AUD_CLK_A, + freq, SND_SOC_CLOCK_OUT); + if (ret) + return ret; + + sub->params = *params; + sub->setting = 1; + + aio_port_reset(sub); + aio_src_reset(sub); + + return 0; +} + +static int uniphier_aio_hw_free(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct uniphier_aio_sub *sub = &aio->sub[substream->stream]; + + sub->setting = 0; + + return 0; +} + +static int uniphier_aio_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + struct uniphier_aio_sub *sub = &aio->sub[substream->stream]; + int ret; + + ret = aio_port_set_param(sub, sub->pass_through, &sub->params); + if (ret) + return ret; + ret = aio_src_set_param(sub, &sub->params); + if (ret) + return ret; + aio_port_set_enable(sub, 1); + + ret = aio_if_set_param(sub, sub->pass_through); + if (ret) + return ret; + + if (sub->swm->type == PORT_TYPE_CONV) { + ret = aio_srcif_set_param(sub); + if (ret) + return ret; + ret = aio_srcch_set_param(sub); + if (ret) + return ret; + aio_srcch_set_enable(sub, 1); + } + + return 0; +} + +const struct snd_soc_dai_ops uniphier_aio_i2s_ops = { + .set_sysclk = uniphier_aio_set_sysclk, + .set_pll = uniphier_aio_set_pll, + .set_fmt = uniphier_aio_set_fmt, + .startup = uniphier_aio_startup, + .shutdown = uniphier_aio_shutdown, + .hw_params = uniphier_aio_hw_params, + .hw_free = uniphier_aio_hw_free, + .prepare = uniphier_aio_prepare, +}; +EXPORT_SYMBOL_GPL(uniphier_aio_i2s_ops); + +const struct snd_soc_dai_ops uniphier_aio_spdif_ops = { + .set_sysclk = uniphier_aio_set_sysclk, + .set_pll = uniphier_aio_set_pll, + .startup = uniphier_aio_startup, + .shutdown = uniphier_aio_shutdown, + .hw_params = uniphier_aio_hw_params, + .hw_free = uniphier_aio_hw_free, + .prepare = uniphier_aio_prepare, +}; +EXPORT_SYMBOL_GPL(uniphier_aio_spdif_ops); + +int uniphier_aio_dai_probe(struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + int i; + + for (i = 0; i < ARRAY_SIZE(aio->sub); i++) { + struct uniphier_aio_sub *sub = &aio->sub[i]; + const struct uniphier_aio_spec *spec; + + spec = find_spec(aio, dai->name, i); + if (!spec) + continue; + + sub->swm = &spec->swm; + sub->spec = spec; + } + + aio_chip_init(aio->chip); + aio->chip->active = 1; + + return 0; +} +EXPORT_SYMBOL_GPL(uniphier_aio_dai_probe); + +int uniphier_aio_dai_remove(struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + + aio->chip->active = 0; + + return 0; +} +EXPORT_SYMBOL_GPL(uniphier_aio_dai_remove); + +int uniphier_aio_dai_suspend(struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + + reset_control_assert(aio->chip->rst); + clk_disable_unprepare(aio->chip->clk); + + return 0; +} +EXPORT_SYMBOL_GPL(uniphier_aio_dai_suspend); + +int uniphier_aio_dai_resume(struct snd_soc_dai *dai) +{ + struct uniphier_aio *aio = uniphier_priv(dai); + int ret, i; + + if (!aio->chip->active) + return 0; + + ret = clk_prepare_enable(aio->chip->clk); + if (ret) + return ret; + + ret = reset_control_deassert(aio->chip->rst); + if (ret) + goto err_out_clock; + + aio_chip_init(aio->chip); + + for (i = 0; i < ARRAY_SIZE(aio->sub); i++) { + struct uniphier_aio_sub *sub = &aio->sub[i]; + + if (!sub->spec || !sub->substream) + continue; + + ret = aio_init(sub); + if (ret) + goto err_out_clock; + + if (!sub->setting) + continue; + + aio_port_reset(sub); + aio_src_reset(sub); + } + + return 0; + +err_out_clock: + clk_disable_unprepare(aio->chip->clk); + + return ret; +} +EXPORT_SYMBOL_GPL(uniphier_aio_dai_resume); + +static const struct snd_soc_component_driver uniphier_aio_component = { + .name = "uniphier-aio", +}; + +int uniphier_aio_probe(struct platform_device *pdev) +{ + struct uniphier_aio_chip *chip; + struct device *dev = &pdev->dev; + int ret, i, j; + + chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + chip->chip_spec = of_device_get_match_data(dev); + if (!chip->chip_spec) + return -EINVAL; + + chip->clk = devm_clk_get(dev, "aio"); + if (IS_ERR(chip->clk)) + return PTR_ERR(chip->clk); + + chip->rst = devm_reset_control_get_shared(dev, "aio"); + if (IS_ERR(chip->rst)) + return PTR_ERR(chip->rst); + + chip->num_aios = chip->chip_spec->num_dais; + chip->aios = devm_kzalloc(dev, + sizeof(struct uniphier_aio) * chip->num_aios, + GFP_KERNEL); + if (!chip->aios) + return -ENOMEM; + + chip->num_plls = chip->chip_spec->num_plls; + chip->plls = devm_kzalloc(dev, sizeof(struct uniphier_aio_pll) * + chip->num_plls, GFP_KERNEL); + if (!chip->plls) + return -ENOMEM; + memcpy(chip->plls, chip->chip_spec->plls, + sizeof(struct uniphier_aio_pll) * chip->num_plls); + + for (i = 0; i < chip->num_aios; i++) { + struct uniphier_aio *aio = &chip->aios[i]; + + aio->chip = chip; + aio->fmt = SND_SOC_DAIFMT_I2S; + + for (j = 0; j < ARRAY_SIZE(aio->sub); j++) { + struct uniphier_aio_sub *sub = &aio->sub[j]; + + sub->aio = aio; + spin_lock_init(&sub->lock); + } + } + + chip->pdev = pdev; + platform_set_drvdata(pdev, chip); + + ret = clk_prepare_enable(chip->clk); + if (ret) + return ret; + + ret = reset_control_deassert(chip->rst); + if (ret) + goto err_out_clock; + + ret = devm_snd_soc_register_component(dev, &uniphier_aio_component, + chip->chip_spec->dais, + chip->chip_spec->num_dais); + if (ret) { + dev_err(dev, "Register component failed.\n"); + goto err_out_reset; + } + + ret = uniphier_aiodma_soc_register_platform(pdev); + if (ret) { + dev_err(dev, "Register platform failed.\n"); + goto err_out_reset; + } + + return 0; + +err_out_reset: + reset_control_assert(chip->rst); + +err_out_clock: + clk_disable_unprepare(chip->clk); + + return ret; +} +EXPORT_SYMBOL_GPL(uniphier_aio_probe); + +int uniphier_aio_remove(struct platform_device *pdev) +{ + struct uniphier_aio_chip *chip = platform_get_drvdata(pdev); + + reset_control_assert(chip->rst); + clk_disable_unprepare(chip->clk); + + return 0; +} +EXPORT_SYMBOL_GPL(uniphier_aio_remove); + +MODULE_AUTHOR("Katsuhiro Suzuki suzuki.katsuhiro@socionext.com"); +MODULE_DESCRIPTION("UniPhier AIO CPU DAI driver."); +MODULE_LICENSE("GPL v2"); diff --git a/sound/soc/uniphier/aio.h b/sound/soc/uniphier/aio.h index 3687f6ff30b1..b12e2e3d7699 100644 --- a/sound/soc/uniphier/aio.h +++ b/sound/soc/uniphier/aio.h @@ -306,6 +306,15 @@ static inline struct uniphier_aio *uniphier_priv(struct snd_soc_dai *dai)
int uniphier_aiodma_soc_register_platform(struct platform_device *pdev);
+int uniphier_aio_dai_probe(struct snd_soc_dai *dai); +int uniphier_aio_dai_remove(struct snd_soc_dai *dai); +int uniphier_aio_dai_suspend(struct snd_soc_dai *dai); +int uniphier_aio_dai_resume(struct snd_soc_dai *dai); +int uniphier_aio_probe(struct platform_device *pdev); +int uniphier_aio_remove(struct platform_device *pdev); +extern const struct snd_soc_dai_ops uniphier_aio_i2s_ops; +extern const struct snd_soc_dai_ops uniphier_aio_spdif_ops; + u64 aio_rb_cnt(struct uniphier_aio_sub *sub); u64 aio_rbt_cnt_to_end(struct uniphier_aio_sub *sub); u64 aio_rb_space(struct uniphier_aio_sub *sub);