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