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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/intel/boards/sof_wm8804.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/intel/boards/sof_wm8804.c')
-rw-r--r-- | sound/soc/intel/boards/sof_wm8804.c | 300 |
1 files changed, 300 insertions, 0 deletions
diff --git a/sound/soc/intel/boards/sof_wm8804.c b/sound/soc/intel/boards/sof_wm8804.c new file mode 100644 index 0000000000..17224d26d9 --- /dev/null +++ b/sound/soc/intel/boards/sof_wm8804.c @@ -0,0 +1,300 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright (c) 2018-2020, Intel Corporation +// +// sof-wm8804.c - ASoC machine driver for Up and Up2 board +// based on WM8804/Hifiberry Digi+ + + +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/gpio/consumer.h> +#include <linux/gpio/machine.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-acpi.h> +#include "../../codecs/wm8804.h" + +struct sof_card_private { + struct gpio_desc *gpio_44; + struct gpio_desc *gpio_48; + int sample_rate; +}; + +#define SOF_WM8804_UP2_QUIRK BIT(0) + +static unsigned long sof_wm8804_quirk; + +static int sof_wm8804_quirk_cb(const struct dmi_system_id *id) +{ + sof_wm8804_quirk = (unsigned long)id->driver_data; + return 1; +} + +static const struct dmi_system_id sof_wm8804_quirk_table[] = { + { + .callback = sof_wm8804_quirk_cb, + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "AAEON"), + DMI_MATCH(DMI_PRODUCT_NAME, "UP-APL01"), + }, + .driver_data = (void *)SOF_WM8804_UP2_QUIRK, + }, + {} +}; + +static int sof_wm8804_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct sof_card_private *ctx = snd_soc_card_get_drvdata(rtd->card); + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); + struct snd_soc_component *codec = codec_dai->component; + const int sysclk = 27000000; /* This is fixed on this board */ + int samplerate; + long mclk_freq; + int mclk_div; + int sampling_freq; + bool clk_44; + int ret; + + samplerate = params_rate(params); + if (samplerate == ctx->sample_rate) + return 0; + + ctx->sample_rate = 0; + + if (samplerate <= 96000) { + mclk_freq = samplerate * 256; + mclk_div = WM8804_MCLKDIV_256FS; + } else { + mclk_freq = samplerate * 128; + mclk_div = WM8804_MCLKDIV_128FS; + } + + switch (samplerate) { + case 32000: + sampling_freq = 0x03; + break; + case 44100: + sampling_freq = 0x00; + break; + case 48000: + sampling_freq = 0x02; + break; + case 88200: + sampling_freq = 0x08; + break; + case 96000: + sampling_freq = 0x0a; + break; + case 176400: + sampling_freq = 0x0c; + break; + case 192000: + sampling_freq = 0x0e; + break; + default: + dev_err(rtd->card->dev, + "unsupported samplerate %d\n", samplerate); + return -EINVAL; + } + + if (samplerate % 16000) + clk_44 = true; /* use 44.1 kHz root frequency */ + else + clk_44 = false; + + if (!(IS_ERR_OR_NULL(ctx->gpio_44) || + IS_ERR_OR_NULL(ctx->gpio_48))) { + /* + * ensure both GPIOs are LOW first, then drive the + * relevant one to HIGH + */ + if (clk_44) { + gpiod_set_value_cansleep(ctx->gpio_48, !clk_44); + gpiod_set_value_cansleep(ctx->gpio_44, clk_44); + } else { + gpiod_set_value_cansleep(ctx->gpio_44, clk_44); + gpiod_set_value_cansleep(ctx->gpio_48, !clk_44); + } + } + + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div); + ret = snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq); + if (ret < 0) { + dev_err(rtd->card->dev, "Failed to set WM8804 PLL\n"); + return ret; + } + + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL, + sysclk, SND_SOC_CLOCK_OUT); + if (ret < 0) { + dev_err(rtd->card->dev, + "Failed to set WM8804 SYSCLK: %d\n", ret); + return ret; + } + + /* set sampling frequency status bits */ + snd_soc_component_update_bits(codec, WM8804_SPDTX4, 0x0f, + sampling_freq); + + ctx->sample_rate = samplerate; + + return 0; +} + +/* machine stream operations */ +static struct snd_soc_ops sof_wm8804_ops = { + .hw_params = sof_wm8804_hw_params, +}; + +SND_SOC_DAILINK_DEF(ssp5_pin, + DAILINK_COMP_ARRAY(COMP_CPU("SSP5 Pin"))); + +SND_SOC_DAILINK_DEF(ssp5_codec, + DAILINK_COMP_ARRAY(COMP_CODEC("i2c-1AEC8804:00", "wm8804-spdif"))); + +SND_SOC_DAILINK_DEF(platform, + DAILINK_COMP_ARRAY(COMP_PLATFORM("0000:00:0e.0"))); + +static struct snd_soc_dai_link dailink[] = { + /* back ends */ + { + .name = "SSP5-Codec", + .id = 0, + .no_pcm = 1, + .dpcm_playback = 1, + .dpcm_capture = 1, + .ops = &sof_wm8804_ops, + SND_SOC_DAILINK_REG(ssp5_pin, ssp5_codec, platform), + }, +}; + +/* SoC card */ +static struct snd_soc_card sof_wm8804_card = { + .name = "wm8804", /* sof- prefix added automatically */ + .owner = THIS_MODULE, + .dai_link = dailink, + .num_links = ARRAY_SIZE(dailink), +}; + + /* i2c-<HID>:00 with HID being 8 chars */ +static char codec_name[SND_ACPI_I2C_ID_LEN]; + +/* + * to control the HifiBerry Digi+ PRO, it's required to toggle GPIO to + * select the clock source. On the Up2 board, this means + * Pin29/BCM5/Linux GPIO 430 and Pin 31/BCM6/ Linux GPIO 404. + * + * Using the ACPI device name is not very nice, but since we only use + * the value for the Up2 board there is no risk of conflict with other + * platforms. + */ + +static struct gpiod_lookup_table up2_gpios_table = { + /* .dev_id is set during probe */ + .table = { + GPIO_LOOKUP("INT3452:01", 73, "BCM-GPIO5", GPIO_ACTIVE_HIGH), + GPIO_LOOKUP("INT3452:01", 74, "BCM-GPIO6", GPIO_ACTIVE_HIGH), + { }, + }, +}; + +static int sof_wm8804_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card; + struct snd_soc_acpi_mach *mach; + struct sof_card_private *ctx; + struct acpi_device *adev; + int dai_index = 0; + int ret; + int i; + + ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + mach = pdev->dev.platform_data; + card = &sof_wm8804_card; + card->dev = &pdev->dev; + + dmi_check_system(sof_wm8804_quirk_table); + + if (sof_wm8804_quirk & SOF_WM8804_UP2_QUIRK) { + up2_gpios_table.dev_id = dev_name(&pdev->dev); + gpiod_add_lookup_table(&up2_gpios_table); + + /* + * The gpios are required for specific boards with + * local oscillators, and optional in other cases. + * Since we can't identify when they are needed, use + * the GPIO as non-optional + */ + + ctx->gpio_44 = devm_gpiod_get(&pdev->dev, "BCM-GPIO5", + GPIOD_OUT_LOW); + if (IS_ERR(ctx->gpio_44)) { + ret = PTR_ERR(ctx->gpio_44); + dev_err(&pdev->dev, + "could not get BCM-GPIO5: %d\n", + ret); + return ret; + } + + ctx->gpio_48 = devm_gpiod_get(&pdev->dev, "BCM-GPIO6", + GPIOD_OUT_LOW); + if (IS_ERR(ctx->gpio_48)) { + ret = PTR_ERR(ctx->gpio_48); + dev_err(&pdev->dev, + "could not get BCM-GPIO6: %d\n", + ret); + return ret; + } + } + + /* fix index of codec dai */ + for (i = 0; i < ARRAY_SIZE(dailink); i++) { + if (!strcmp(dailink[i].codecs->name, "i2c-1AEC8804:00")) { + dai_index = i; + break; + } + } + + /* fixup codec name based on HID */ + adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1); + if (adev) { + snprintf(codec_name, sizeof(codec_name), + "%s%s", "i2c-", acpi_dev_name(adev)); + dailink[dai_index].codecs->name = codec_name; + } + acpi_dev_put(adev); + + snd_soc_card_set_drvdata(card, ctx); + + return devm_snd_soc_register_card(&pdev->dev, card); +} + +static void sof_wm8804_remove(struct platform_device *pdev) +{ + if (sof_wm8804_quirk & SOF_WM8804_UP2_QUIRK) + gpiod_remove_lookup_table(&up2_gpios_table); +} + +static struct platform_driver sof_wm8804_driver = { + .driver = { + .name = "sof-wm8804", + .pm = &snd_soc_pm_ops, + }, + .probe = sof_wm8804_probe, + .remove_new = sof_wm8804_remove, +}; +module_platform_driver(sof_wm8804_driver); + +MODULE_DESCRIPTION("ASoC Intel(R) SOF + WM8804 Machine driver"); +MODULE_AUTHOR("Pierre-Louis Bossart"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:sof-wm8804"); |