Merge tag 'sound-6.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
[linux-block.git] / sound / soc / intel / boards / sof_wm8804.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2018-2020, Intel Corporation
3 //
4 // sof-wm8804.c - ASoC machine driver for Up and Up2 board
5 // based on WM8804/Hifiberry Digi+
6
7
8 #include <linux/acpi.h>
9 #include <linux/dmi.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"
20
21 struct sof_card_private {
22         struct gpio_desc *gpio_44;
23         struct gpio_desc *gpio_48;
24         int sample_rate;
25 };
26
27 #define SOF_WM8804_UP2_QUIRK                    BIT(0)
28
29 static unsigned long sof_wm8804_quirk;
30
31 static int sof_wm8804_quirk_cb(const struct dmi_system_id *id)
32 {
33         sof_wm8804_quirk = (unsigned long)id->driver_data;
34         return 1;
35 }
36
37 static const struct dmi_system_id sof_wm8804_quirk_table[] = {
38         {
39                 .callback = sof_wm8804_quirk_cb,
40                 .matches = {
41                         DMI_MATCH(DMI_SYS_VENDOR, "AAEON"),
42                         DMI_MATCH(DMI_PRODUCT_NAME, "UP-APL01"),
43                 },
44                 .driver_data = (void *)SOF_WM8804_UP2_QUIRK,
45         },
46         {}
47 };
48
49 static int sof_wm8804_hw_params(struct snd_pcm_substream *substream,
50                                 struct snd_pcm_hw_params *params)
51 {
52         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
53         struct sof_card_private *ctx = snd_soc_card_get_drvdata(rtd->card);
54         struct snd_soc_dai *codec_dai = asoc_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 */
57         int samplerate;
58         long mclk_freq;
59         int mclk_div;
60         int sampling_freq;
61         bool clk_44;
62         int ret;
63
64         samplerate = params_rate(params);
65         if (samplerate == ctx->sample_rate)
66                 return 0;
67
68         ctx->sample_rate = 0;
69
70         if (samplerate <= 96000) {
71                 mclk_freq = samplerate * 256;
72                 mclk_div = WM8804_MCLKDIV_256FS;
73         } else {
74                 mclk_freq = samplerate * 128;
75                 mclk_div = WM8804_MCLKDIV_128FS;
76         }
77
78         switch (samplerate) {
79         case 32000:
80                 sampling_freq = 0x03;
81                 break;
82         case 44100:
83                 sampling_freq = 0x00;
84                 break;
85         case 48000:
86                 sampling_freq = 0x02;
87                 break;
88         case 88200:
89                 sampling_freq = 0x08;
90                 break;
91         case 96000:
92                 sampling_freq = 0x0a;
93                 break;
94         case 176400:
95                 sampling_freq = 0x0c;
96                 break;
97         case 192000:
98                 sampling_freq = 0x0e;
99                 break;
100         default:
101                 dev_err(rtd->card->dev,
102                         "unsupported samplerate %d\n", samplerate);
103                 return -EINVAL;
104         }
105
106         if (samplerate % 16000)
107                 clk_44 = true; /* use 44.1 kHz root frequency */
108         else
109                 clk_44 = false;
110
111         if (!(IS_ERR_OR_NULL(ctx->gpio_44) ||
112               IS_ERR_OR_NULL(ctx->gpio_48))) {
113                 /*
114                  * ensure both GPIOs are LOW first, then drive the
115                  * relevant one to HIGH
116                  */
117                 if (clk_44) {
118                         gpiod_set_value_cansleep(ctx->gpio_48, !clk_44);
119                         gpiod_set_value_cansleep(ctx->gpio_44, clk_44);
120                 } else {
121                         gpiod_set_value_cansleep(ctx->gpio_44, clk_44);
122                         gpiod_set_value_cansleep(ctx->gpio_48, !clk_44);
123                 }
124         }
125
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);
128         if (ret < 0) {
129                 dev_err(rtd->card->dev, "Failed to set WM8804 PLL\n");
130                 return ret;
131         }
132
133         ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
134                                      sysclk, SND_SOC_CLOCK_OUT);
135         if (ret < 0) {
136                 dev_err(rtd->card->dev,
137                         "Failed to set WM8804 SYSCLK: %d\n", ret);
138                 return ret;
139         }
140
141         /* set sampling frequency status bits */
142         snd_soc_component_update_bits(codec, WM8804_SPDTX4, 0x0f,
143                                       sampling_freq);
144
145         ctx->sample_rate = samplerate;
146
147         return 0;
148 }
149
150 /* machine stream operations */
151 static struct snd_soc_ops sof_wm8804_ops = {
152         .hw_params = sof_wm8804_hw_params,
153 };
154
155 SND_SOC_DAILINK_DEF(ssp5_pin,
156         DAILINK_COMP_ARRAY(COMP_CPU("SSP5 Pin")));
157
158 SND_SOC_DAILINK_DEF(ssp5_codec,
159         DAILINK_COMP_ARRAY(COMP_CODEC("i2c-1AEC8804:00", "wm8804-spdif")));
160
161 SND_SOC_DAILINK_DEF(platform,
162         DAILINK_COMP_ARRAY(COMP_PLATFORM("0000:00:0e.0")));
163
164 static struct snd_soc_dai_link dailink[] = {
165         /* back ends */
166         {
167                 .name = "SSP5-Codec",
168                 .id = 0,
169                 .no_pcm = 1,
170                 .dpcm_playback = 1,
171                 .dpcm_capture = 1,
172                 .ops = &sof_wm8804_ops,
173                 SND_SOC_DAILINK_REG(ssp5_pin, ssp5_codec, platform),
174         },
175 };
176
177 /* SoC card */
178 static struct snd_soc_card sof_wm8804_card = {
179         .name = "wm8804", /* sof- prefix added automatically */
180         .owner = THIS_MODULE,
181         .dai_link = dailink,
182         .num_links = ARRAY_SIZE(dailink),
183 };
184
185  /* i2c-<HID>:00 with HID being 8 chars */
186 static char codec_name[SND_ACPI_I2C_ID_LEN];
187
188 /*
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.
192  *
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
195  * platforms.
196  */
197
198 static struct gpiod_lookup_table up2_gpios_table = {
199         /* .dev_id is set during probe */
200         .table = {
201                 GPIO_LOOKUP("INT3452:01", 73, "BCM-GPIO5", GPIO_ACTIVE_HIGH),
202                 GPIO_LOOKUP("INT3452:01", 74, "BCM-GPIO6", GPIO_ACTIVE_HIGH),
203                 { },
204         },
205 };
206
207 static int sof_wm8804_probe(struct platform_device *pdev)
208 {
209         struct snd_soc_card *card;
210         struct snd_soc_acpi_mach *mach;
211         struct sof_card_private *ctx;
212         struct acpi_device *adev;
213         int dai_index = 0;
214         int ret;
215         int i;
216
217         ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
218         if (!ctx)
219                 return -ENOMEM;
220
221         mach = pdev->dev.platform_data;
222         card = &sof_wm8804_card;
223         card->dev = &pdev->dev;
224
225         dmi_check_system(sof_wm8804_quirk_table);
226
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);
230
231                 /*
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
236                  */
237
238                 ctx->gpio_44 = devm_gpiod_get(&pdev->dev, "BCM-GPIO5",
239                                               GPIOD_OUT_LOW);
240                 if (IS_ERR(ctx->gpio_44)) {
241                         ret = PTR_ERR(ctx->gpio_44);
242                         dev_err(&pdev->dev,
243                                 "could not get BCM-GPIO5: %d\n",
244                                 ret);
245                         return ret;
246                 }
247
248                 ctx->gpio_48 = devm_gpiod_get(&pdev->dev, "BCM-GPIO6",
249                                               GPIOD_OUT_LOW);
250                 if (IS_ERR(ctx->gpio_48)) {
251                         ret = PTR_ERR(ctx->gpio_48);
252                         dev_err(&pdev->dev,
253                                 "could not get BCM-GPIO6: %d\n",
254                                 ret);
255                         return ret;
256                 }
257         }
258
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")) {
262                         dai_index = i;
263                         break;
264                 }
265         }
266
267         /* fixup codec name based on HID */
268         adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
269         if (adev) {
270                 snprintf(codec_name, sizeof(codec_name),
271                          "%s%s", "i2c-", acpi_dev_name(adev));
272                 dailink[dai_index].codecs->name = codec_name;
273         }
274         acpi_dev_put(adev);
275
276         snd_soc_card_set_drvdata(card, ctx);
277
278         return devm_snd_soc_register_card(&pdev->dev, card);
279 }
280
281 static void sof_wm8804_remove(struct platform_device *pdev)
282 {
283         if (sof_wm8804_quirk & SOF_WM8804_UP2_QUIRK)
284                 gpiod_remove_lookup_table(&up2_gpios_table);
285 }
286
287 static struct platform_driver sof_wm8804_driver = {
288         .driver = {
289                 .name = "sof-wm8804",
290                 .pm = &snd_soc_pm_ops,
291         },
292         .probe = sof_wm8804_probe,
293         .remove_new = sof_wm8804_remove,
294 };
295 module_platform_driver(sof_wm8804_driver);
296
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");