bytcht_cx2072x.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2//
  3// ASoC DPCM Machine driver for Baytrail / Cherrytrail platforms with
  4// CX2072X codec
  5//
  6
  7#include <linux/acpi.h>
  8#include <linux/device.h>
  9#include <linux/gpio/consumer.h>
 10#include <linux/module.h>
 11#include <linux/platform_device.h>
 12#include <linux/slab.h>
 13#include <sound/pcm.h>
 14#include <sound/pcm_params.h>
 15#include <sound/jack.h>
 16#include <sound/soc.h>
 17#include <sound/soc-acpi.h>
 18#include "../../codecs/cx2072x.h"
 19#include "../atom/sst-atom-controls.h"
 20
 21static const struct snd_soc_dapm_widget byt_cht_cx2072x_widgets[] = {
 22	SND_SOC_DAPM_HP("Headphone", NULL),
 23	SND_SOC_DAPM_MIC("Headset Mic", NULL),
 24	SND_SOC_DAPM_MIC("Int Mic", NULL),
 25	SND_SOC_DAPM_SPK("Ext Spk", NULL),
 26};
 27
 28static const struct snd_soc_dapm_route byt_cht_cx2072x_audio_map[] = {
 29	/* External Speakers: HFL, HFR */
 30	{"Headphone", NULL, "PORTA"},
 31	{"Ext Spk", NULL, "PORTG"},
 32	{"PORTC", NULL, "Int Mic"},
 33	{"PORTD", NULL, "Headset Mic"},
 34
 35	{"Playback", NULL, "ssp2 Tx"},
 36	{"ssp2 Tx", NULL, "codec_out0"},
 37	{"ssp2 Tx", NULL, "codec_out1"},
 38	{"codec_in0", NULL, "ssp2 Rx"},
 39	{"codec_in1", NULL, "ssp2 Rx"},
 40	{"ssp2 Rx", NULL, "Capture"},
 41};
 42
 43static const struct snd_kcontrol_new byt_cht_cx2072x_controls[] = {
 44	SOC_DAPM_PIN_SWITCH("Headphone"),
 45	SOC_DAPM_PIN_SWITCH("Headset Mic"),
 46	SOC_DAPM_PIN_SWITCH("Int Mic"),
 47	SOC_DAPM_PIN_SWITCH("Ext Spk"),
 48};
 49
 50static struct snd_soc_jack byt_cht_cx2072x_headset;
 51
 52/* Headset jack detection DAPM pins */
 53static struct snd_soc_jack_pin byt_cht_cx2072x_headset_pins[] = {
 54	{
 55		.pin = "Headset Mic",
 56		.mask = SND_JACK_MICROPHONE,
 57	},
 58	{
 59		.pin = "Headphone",
 60		.mask = SND_JACK_HEADPHONE,
 61	},
 62};
 63
 64static const struct acpi_gpio_params byt_cht_cx2072x_headset_gpios;
 65static const struct acpi_gpio_mapping byt_cht_cx2072x_acpi_gpios[] = {
 66	{ "headset-gpios", &byt_cht_cx2072x_headset_gpios, 1 },
 67	{},
 68};
 69
 70static int byt_cht_cx2072x_init(struct snd_soc_pcm_runtime *rtd)
 71{
 72	struct snd_soc_card *card = rtd->card;
 73	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
 74	struct snd_soc_component *codec = snd_soc_rtd_to_codec(rtd, 0)->component;
 75	int ret;
 76
 77	if (devm_acpi_dev_add_driver_gpios(codec->dev,
 78					   byt_cht_cx2072x_acpi_gpios))
 79		dev_warn(rtd->dev, "Unable to add GPIO mapping table\n");
 80
 81	snd_soc_dapm_set_idle_bias(dapm, false);
 82
 83	/* set the default PLL rate, the clock is handled by the codec driver */
 84	ret = snd_soc_dai_set_sysclk(snd_soc_rtd_to_codec(rtd, 0), CX2072X_MCLK_EXTERNAL_PLL,
 85				     19200000, SND_SOC_CLOCK_IN);
 86	if (ret) {
 87		dev_err(rtd->dev, "Could not set sysclk\n");
 88		return ret;
 89	}
 90
 91	ret = snd_soc_card_jack_new_pins(card, "Headset",
 92					 SND_JACK_HEADSET | SND_JACK_BTN_0,
 93					 &byt_cht_cx2072x_headset,
 94					 byt_cht_cx2072x_headset_pins,
 95					 ARRAY_SIZE(byt_cht_cx2072x_headset_pins));
 96	if (ret)
 97		return ret;
 98
 99	snd_soc_component_set_jack(codec, &byt_cht_cx2072x_headset, NULL);
100
101	snd_soc_dai_set_bclk_ratio(snd_soc_rtd_to_codec(rtd, 0), 50);
102
103	return 0;
104}
105
106static int byt_cht_cx2072x_fixup(struct snd_soc_pcm_runtime *rtd,
107				 struct snd_pcm_hw_params *params)
108{
109	struct snd_interval *rate =
110		hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE);
111	struct snd_interval *channels =
112		hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS);
113	int ret;
114
115	/* The DSP will convert the FE rate to 48k, stereo, 24bits */
116	rate->min = rate->max = 48000;
117	channels->min = channels->max = 2;
118
119	/* set SSP2 to 24-bit */
120	params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
121
122	/*
123	 * Default mode for SSP configuration is TDM 4 slot, override config
124	 * with explicit setting to I2S 2ch 24-bit. The word length is set with
125	 * dai_set_tdm_slot() since there is no other API exposed
126	 */
127	ret = snd_soc_dai_set_fmt(snd_soc_rtd_to_cpu(rtd, 0),
128				SND_SOC_DAIFMT_I2S     |
129				SND_SOC_DAIFMT_NB_NF   |
130				SND_SOC_DAIFMT_BP_FP);
131	if (ret < 0) {
132		dev_err(rtd->dev, "can't set format to I2S, err %d\n", ret);
133		return ret;
134	}
135
136	ret = snd_soc_dai_set_tdm_slot(snd_soc_rtd_to_cpu(rtd, 0), 0x3, 0x3, 2, 24);
137	if (ret < 0) {
138		dev_err(rtd->dev, "can't set I2S config, err %d\n", ret);
139		return ret;
140	}
141
142	return 0;
143}
144
145static int byt_cht_cx2072x_aif1_startup(struct snd_pcm_substream *substream)
146{
147	return snd_pcm_hw_constraint_single(substream->runtime,
148					    SNDRV_PCM_HW_PARAM_RATE, 48000);
149}
150
151static const struct snd_soc_ops byt_cht_cx2072x_aif1_ops = {
152	.startup = byt_cht_cx2072x_aif1_startup,
153};
154
155SND_SOC_DAILINK_DEF(dummy,
156	DAILINK_COMP_ARRAY(COMP_DUMMY()));
157
158SND_SOC_DAILINK_DEF(media,
159	DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
160
161SND_SOC_DAILINK_DEF(deepbuffer,
162	DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
163
164SND_SOC_DAILINK_DEF(ssp2,
165	DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
166
167SND_SOC_DAILINK_DEF(cx2072x,
168	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-14F10720:00", "cx2072x-hifi")));
169
170SND_SOC_DAILINK_DEF(platform,
171	DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
172
173static struct snd_soc_dai_link byt_cht_cx2072x_dais[] = {
174	[MERR_DPCM_AUDIO] = {
175		.name = "Audio Port",
176		.stream_name = "Audio",
177		.nonatomic = true,
178		.dynamic = 1,
179		.ops = &byt_cht_cx2072x_aif1_ops,
180		SND_SOC_DAILINK_REG(media, dummy, platform),
181	},
182	[MERR_DPCM_DEEP_BUFFER] = {
183		.name = "Deep-Buffer Audio Port",
184		.stream_name = "Deep-Buffer Audio",
185		.nonatomic = true,
186		.dynamic = 1,
187		.playback_only = 1,
188		.ops = &byt_cht_cx2072x_aif1_ops,
189		SND_SOC_DAILINK_REG(deepbuffer, dummy, platform),
190	},
191	/* back ends */
192	{
193		.name = "SSP2-Codec",
194		.id = 0,
195		.no_pcm = 1,
196		.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
197					      | SND_SOC_DAIFMT_CBC_CFC,
198		.init = byt_cht_cx2072x_init,
199		.be_hw_params_fixup = byt_cht_cx2072x_fixup,
200		SND_SOC_DAILINK_REG(ssp2, cx2072x, platform),
201	},
202};
203
204/* use space before codec name to simplify card ID, and simplify driver name */
205#define SOF_CARD_NAME "bytcht cx2072x" /* card name will be 'sof-bytcht cx2072x' */
206#define SOF_DRIVER_NAME "SOF"
207
208#define CARD_NAME "bytcht-cx2072x"
209#define DRIVER_NAME NULL /* card name will be used for driver name */
210
211/* SoC card */
212static struct snd_soc_card byt_cht_cx2072x_card = {
213	.name = CARD_NAME,
214	.driver_name = DRIVER_NAME,
215	.owner = THIS_MODULE,
216	.dai_link = byt_cht_cx2072x_dais,
217	.num_links = ARRAY_SIZE(byt_cht_cx2072x_dais),
218	.dapm_widgets = byt_cht_cx2072x_widgets,
219	.num_dapm_widgets = ARRAY_SIZE(byt_cht_cx2072x_widgets),
220	.dapm_routes = byt_cht_cx2072x_audio_map,
221	.num_dapm_routes = ARRAY_SIZE(byt_cht_cx2072x_audio_map),
222	.controls = byt_cht_cx2072x_controls,
223	.num_controls = ARRAY_SIZE(byt_cht_cx2072x_controls),
224};
225
226static char codec_name[SND_ACPI_I2C_ID_LEN];
227
228static int snd_byt_cht_cx2072x_probe(struct platform_device *pdev)
229{
230	struct snd_soc_acpi_mach *mach;
231	struct acpi_device *adev;
232	int dai_index = 0;
233	bool sof_parent;
234	int i, ret;
235
236	byt_cht_cx2072x_card.dev = &pdev->dev;
237	mach = dev_get_platdata(&pdev->dev);
238
239	/* fix index of codec dai */
240	for (i = 0; i < ARRAY_SIZE(byt_cht_cx2072x_dais); i++) {
241		if (byt_cht_cx2072x_dais[i].num_codecs &&
242		    !strcmp(byt_cht_cx2072x_dais[i].codecs->name,
243			    "i2c-14F10720:00")) {
244			dai_index = i;
245			break;
246		}
247	}
248
249	/* fixup codec name based on HID */
250	adev = acpi_dev_get_first_match_dev(mach->id, NULL, -1);
251	if (adev) {
252		snprintf(codec_name, sizeof(codec_name), "i2c-%s",
253			 acpi_dev_name(adev));
254		byt_cht_cx2072x_dais[dai_index].codecs->name = codec_name;
255	} else {
256		dev_err(&pdev->dev, "Error cannot find '%s' dev\n", mach->id);
257		return -ENOENT;
258	}
259
260	acpi_dev_put(adev);
261
262	/* override platform name, if required */
263	ret = snd_soc_fixup_dai_links_platform_name(&byt_cht_cx2072x_card,
264						    mach->mach_params.platform);
265	if (ret)
266		return ret;
267
268	sof_parent = snd_soc_acpi_sof_parent(&pdev->dev);
269
270	/* set card and driver name */
271	if (sof_parent) {
272		byt_cht_cx2072x_card.name = SOF_CARD_NAME;
273		byt_cht_cx2072x_card.driver_name = SOF_DRIVER_NAME;
274	} else {
275		byt_cht_cx2072x_card.name = CARD_NAME;
276		byt_cht_cx2072x_card.driver_name = DRIVER_NAME;
277	}
278
279	/* set pm ops */
280	if (sof_parent)
281		pdev->dev.driver->pm = &snd_soc_pm_ops;
282
283	return devm_snd_soc_register_card(&pdev->dev, &byt_cht_cx2072x_card);
284}
285
286static struct platform_driver snd_byt_cht_cx2072x_driver = {
287	.driver = {
288		.name = "bytcht_cx2072x",
289	},
290	.probe = snd_byt_cht_cx2072x_probe,
291};
292module_platform_driver(snd_byt_cht_cx2072x_driver);
293
294MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Machine driver");
295MODULE_LICENSE("GPL v2");
296MODULE_ALIAS("platform:bytcht_cx2072x");