1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2018-2020, Intel Corporation
4 // sof-wm8804.c - ASoC machine driver for Up and Up2 board
5 // based on WM8804/Hifiberry Digi+
8 #include <linux/acpi.h>
10 #include <linux/gpio/consumer.h>
11 #include <linux/gpio/machine.h>
12 #include <linux/module.h>
13 #include <linux/platform_device.h>
14 #include <linux/slab.h>
15 #include <sound/pcm.h>
16 #include <sound/pcm_params.h>
17 #include <sound/soc.h>
18 #include <sound/soc-acpi.h>
19 #include "../../codecs/wm8804.h"
21 struct sof_card_private {
22 struct gpio_desc *gpio_44;
23 struct gpio_desc *gpio_48;
27 #define SOF_WM8804_UP2_QUIRK BIT(0)
29 static unsigned long sof_wm8804_quirk;
31 static int sof_wm8804_quirk_cb(const struct dmi_system_id *id)
33 sof_wm8804_quirk = (unsigned long)id->driver_data;
37 static const struct dmi_system_id sof_wm8804_quirk_table[] = {
39 .callback = sof_wm8804_quirk_cb,
41 DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
42 DMI_MATCH(DMI_PRODUCT_NAME, "UP-APL01"),
44 .driver_data = (void *)SOF_WM8804_UP2_QUIRK,
49 static int sof_wm8804_hw_params(struct snd_pcm_substream *substream,
50 struct snd_pcm_hw_params *params)
52 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
53 struct sof_card_private *ctx = snd_soc_card_get_drvdata(rtd->card);
54 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
55 struct snd_soc_component *codec = codec_dai->component;
56 const int sysclk = 27000000; /* This is fixed on this board */
64 samplerate = params_rate(params);
65 if (samplerate == ctx->sample_rate)
70 if (samplerate <= 96000) {
71 mclk_freq = samplerate * 256;
72 mclk_div = WM8804_MCLKDIV_256FS;
74 mclk_freq = samplerate * 128;
75 mclk_div = WM8804_MCLKDIV_128FS;
101 dev_err(rtd->card->dev,
102 "unsupported samplerate %d\n", samplerate);
106 if (samplerate % 16000)
107 clk_44 = true; /* use 44.1 kHz root frequency */
111 if (!(IS_ERR_OR_NULL(ctx->gpio_44) ||
112 IS_ERR_OR_NULL(ctx->gpio_48))) {
114 * ensure both GPIOs are LOW first, then drive the
115 * relevant one to HIGH
118 gpiod_set_value_cansleep(ctx->gpio_48, !clk_44);
119 gpiod_set_value_cansleep(ctx->gpio_44, clk_44);
121 gpiod_set_value_cansleep(ctx->gpio_44, clk_44);
122 gpiod_set_value_cansleep(ctx->gpio_48, !clk_44);
126 snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
127 ret = snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
129 dev_err(rtd->card->dev, "Failed to set WM8804 PLL\n");
133 ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
134 sysclk, SND_SOC_CLOCK_OUT);
136 dev_err(rtd->card->dev,
137 "Failed to set WM8804 SYSCLK: %d\n", ret);
141 /* set sampling frequency status bits */
142 snd_soc_component_update_bits(codec, WM8804_SPDTX4, 0x0f,
145 ctx->sample_rate = samplerate;
150 /* machine stream operations */
151 static struct snd_soc_ops sof_wm8804_ops = {
152 .hw_params = sof_wm8804_hw_params,
155 SND_SOC_DAILINK_DEF(ssp5_pin,
156 DAILINK_COMP_ARRAY(COMP_CPU("SSP5 Pin")));
158 SND_SOC_DAILINK_DEF(ssp5_codec,
159 DAILINK_COMP_ARRAY(COMP_CODEC("i2c-1AEC8804:00", "wm8804-spdif")));
161 SND_SOC_DAILINK_DEF(platform,
162 DAILINK_COMP_ARRAY(COMP_PLATFORM("0000:00:0e.0")));
164 static struct snd_soc_dai_link dailink[] = {
167 .name = "SSP5-Codec",
172 .ops = &sof_wm8804_ops,
173 SND_SOC_DAILINK_REG(ssp5_pin, ssp5_codec, platform),
178 static struct snd_soc_card sof_wm8804_card = {
179 .name = "wm8804", /* sof- prefix added automatically */
180 .owner = THIS_MODULE,
182 .num_links = ARRAY_SIZE(dailink),
185 /* i2c-<HID>:00 with HID being 8 chars */
186 static char codec_name[SND_ACPI_I2C_ID_LEN];
189 * to control the HifiBerry Digi+ PRO, it's required to toggle GPIO to
190 * select the clock source. On the Up2 board, this means
191 * Pin29/BCM5/Linux GPIO 430 and Pin 31/BCM6/ Linux GPIO 404.
193 * Using the ACPI device name is not very nice, but since we only use
194 * the value for the Up2 board there is no risk of conflict with other
198 static struct gpiod_lookup_table up2_gpios_table = {
199 /* .dev_id is set during probe */
201 GPIO_LOOKUP("INT3452:01", 73, "BCM-GPIO5", GPIO_ACTIVE_HIGH),
202 GPIO_LOOKUP("INT3452:01", 74, "BCM-GPIO6", GPIO_ACTIVE_HIGH),
207 static int sof_wm8804_probe(struct platform_device *pdev)
209 struct snd_soc_card *card;
210 struct snd_soc_acpi_mach *mach;
211 struct sof_card_private *ctx;
212 struct acpi_device *adev;
217 ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
221 mach = pdev->dev.platform_data;
222 card = &sof_wm8804_card;
223 card->dev = &pdev->dev;
225 dmi_check_system(sof_wm8804_quirk_table);
227 if (sof_wm8804_quirk & SOF_WM8804_UP2_QUIRK) {
228 up2_gpios_table.dev_id = dev_name(&pdev->dev);
229 gpiod_add_lookup_table(&up2_gpios_table);
232 * The gpios are required for specific boards with
233 * local oscillators, and optional in other cases.
234 * Since we can't identify when they are needed, use
235 * the GPIO as non-optional
238 ctx->gpio_44 = devm_gpiod_get(&pdev->dev, "BCM-GPIO5",
240 if (IS_ERR(ctx->gpio_44)) {
241 ret = PTR_ERR(ctx->gpio_44);
243 "could not get BCM-GPIO5: %d\n",
248 ctx->gpio_48 = devm_gpiod_get(&pdev->dev, "BCM-GPIO6",
250 if (IS_ERR(ctx->gpio_48)) {
251 ret = PTR_ERR(ctx->gpio_48);
253 "could not get BCM-GPIO6: %d\n",
259 /* fix index of codec dai */
260 for (i = 0; i < ARRAY_SIZE(dailink); i++) {
261 if (!strcmp(dailink[i].codecs->name, "i2c-1AEC8804:00")) {
267 /* fixup codec name based on HID */
268 adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
270 snprintf(codec_name, sizeof(codec_name),
271 "%s%s", "i2c-", acpi_dev_name(adev));
272 dailink[dai_index].codecs->name = codec_name;
276 snd_soc_card_set_drvdata(card, ctx);
278 return devm_snd_soc_register_card(&pdev->dev, card);
281 static void sof_wm8804_remove(struct platform_device *pdev)
283 if (sof_wm8804_quirk & SOF_WM8804_UP2_QUIRK)
284 gpiod_remove_lookup_table(&up2_gpios_table);
287 static struct platform_driver sof_wm8804_driver = {
289 .name = "sof-wm8804",
290 .pm = &snd_soc_pm_ops,
292 .probe = sof_wm8804_probe,
293 .remove_new = sof_wm8804_remove,
295 module_platform_driver(sof_wm8804_driver);
297 MODULE_DESCRIPTION("ASoC Intel(R) SOF + WM8804 Machine driver");
298 MODULE_AUTHOR("Pierre-Louis Bossart");
299 MODULE_LICENSE("GPL v2");
300 MODULE_ALIAS("platform:sof-wm8804");