spitz.c

  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * spitz.c  --  SoC audio for Sharp SL-Cxx00 models Spitz, Borzoi and Akita
  4 *
  5 * Copyright 2005 Wolfson Microelectronics PLC.
  6 * Copyright 2005 Openedhand Ltd.
  7 *
  8 * Authors: Liam Girdwood <lrg@slimlogic.co.uk>
  9 *          Richard Purdie <richard@openedhand.com>
 10 */
 11
 12#include <linux/module.h>
 13#include <linux/moduleparam.h>
 14#include <linux/timer.h>
 15#include <linux/interrupt.h>
 16#include <linux/platform_device.h>
 17#include <linux/gpio/consumer.h>
 18#include <sound/core.h>
 19#include <sound/pcm.h>
 20#include <sound/soc.h>
 21
 22#include <asm/mach-types.h>
 23#include "../codecs/wm8750.h"
 24#include "pxa2xx-i2s.h"
 25
 26#define SPITZ_HP        0
 27#define SPITZ_MIC       1
 28#define SPITZ_LINE      2
 29#define SPITZ_HEADSET   3
 30#define SPITZ_HP_OFF    4
 31#define SPITZ_SPK_ON    0
 32#define SPITZ_SPK_OFF   1
 33
 34 /* audio clock in Hz - rounded from 12.235MHz */
 35#define SPITZ_AUDIO_CLOCK 12288000
 36
 37static int spitz_jack_func;
 38static int spitz_spk_func;
 39static struct gpio_desc *gpiod_mic, *gpiod_mute_l, *gpiod_mute_r;
 40
 41static void spitz_ext_control(struct snd_soc_dapm_context *dapm)
 42{
 43	snd_soc_dapm_mutex_lock(dapm);
 44
 45	if (spitz_spk_func == SPITZ_SPK_ON)
 46		snd_soc_dapm_enable_pin_unlocked(dapm, "Ext Spk");
 47	else
 48		snd_soc_dapm_disable_pin_unlocked(dapm, "Ext Spk");
 49
 50	/* set up jack connection */
 51	switch (spitz_jack_func) {
 52	case SPITZ_HP:
 53		/* enable and unmute hp jack, disable mic bias */
 54		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 55		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 56		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 57		snd_soc_dapm_enable_pin_unlocked(dapm, "Headphone Jack");
 58		gpiod_set_value(gpiod_mute_l, 1);
 59		gpiod_set_value(gpiod_mute_r, 1);
 60		break;
 61	case SPITZ_MIC:
 62		/* enable mic jack and bias, mute hp */
 63		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 64		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 65		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 66		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 67		gpiod_set_value(gpiod_mute_l, 0);
 68		gpiod_set_value(gpiod_mute_r, 0);
 69		break;
 70	case SPITZ_LINE:
 71		/* enable line jack, disable mic bias and mute hp */
 72		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 73		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 74		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 75		snd_soc_dapm_enable_pin_unlocked(dapm, "Line Jack");
 76		gpiod_set_value(gpiod_mute_l, 0);
 77		gpiod_set_value(gpiod_mute_r, 0);
 78		break;
 79	case SPITZ_HEADSET:
 80		/* enable and unmute headset jack enable mic bias, mute L hp */
 81		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 82		snd_soc_dapm_enable_pin_unlocked(dapm, "Mic Jack");
 83		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 84		snd_soc_dapm_enable_pin_unlocked(dapm, "Headset Jack");
 85		gpiod_set_value(gpiod_mute_l, 0);
 86		gpiod_set_value(gpiod_mute_r, 1);
 87		break;
 88	case SPITZ_HP_OFF:
 89
 90		/* jack removed, everything off */
 91		snd_soc_dapm_disable_pin_unlocked(dapm, "Headphone Jack");
 92		snd_soc_dapm_disable_pin_unlocked(dapm, "Headset Jack");
 93		snd_soc_dapm_disable_pin_unlocked(dapm, "Mic Jack");
 94		snd_soc_dapm_disable_pin_unlocked(dapm, "Line Jack");
 95		gpiod_set_value(gpiod_mute_l, 0);
 96		gpiod_set_value(gpiod_mute_r, 0);
 97		break;
 98	}
 99
100	snd_soc_dapm_sync_unlocked(dapm);
101
102	snd_soc_dapm_mutex_unlock(dapm);
103}
104
105static int spitz_startup(struct snd_pcm_substream *substream)
106{
107	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
108	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(rtd->card);
109
110	/* check the jack status at stream startup */
111	spitz_ext_control(dapm);
112
113	return 0;
114}
115
116static int spitz_hw_params(struct snd_pcm_substream *substream,
117	struct snd_pcm_hw_params *params)
118{
119	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
120	struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
121	struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0);
122	unsigned int clk = 0;
123	int ret = 0;
124
125	switch (params_rate(params)) {
126	case 8000:
127	case 16000:
128	case 48000:
129	case 96000:
130		clk = 12288000;
131		break;
132	case 11025:
133	case 22050:
134	case 44100:
135		clk = 11289600;
136		break;
137	}
138
139	/* set the codec system clock for DAC and ADC */
140	ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
141		SND_SOC_CLOCK_IN);
142	if (ret < 0)
143		return ret;
144
145	/* set the I2S system clock as input (unused) */
146	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
147		SND_SOC_CLOCK_IN);
148	if (ret < 0)
149		return ret;
150
151	return 0;
152}
153
154static const struct snd_soc_ops spitz_ops = {
155	.startup = spitz_startup,
156	.hw_params = spitz_hw_params,
157};
158
159static int spitz_get_jack(struct snd_kcontrol *kcontrol,
160	struct snd_ctl_elem_value *ucontrol)
161{
162	ucontrol->value.enumerated.item[0] = spitz_jack_func;
163	return 0;
164}
165
166static int spitz_set_jack(struct snd_kcontrol *kcontrol,
167	struct snd_ctl_elem_value *ucontrol)
168{
169	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
170	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
171
172	if (spitz_jack_func == ucontrol->value.enumerated.item[0])
173		return 0;
174
175	spitz_jack_func = ucontrol->value.enumerated.item[0];
176	spitz_ext_control(dapm);
177	return 1;
178}
179
180static int spitz_get_spk(struct snd_kcontrol *kcontrol,
181	struct snd_ctl_elem_value *ucontrol)
182{
183	ucontrol->value.enumerated.item[0] = spitz_spk_func;
184	return 0;
185}
186
187static int spitz_set_spk(struct snd_kcontrol *kcontrol,
188	struct snd_ctl_elem_value *ucontrol)
189{
190	struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
191	struct snd_soc_dapm_context *dapm = snd_soc_card_to_dapm(card);
192
193	if (spitz_spk_func == ucontrol->value.enumerated.item[0])
194		return 0;
195
196	spitz_spk_func = ucontrol->value.enumerated.item[0];
197	spitz_ext_control(dapm);
198	return 1;
199}
200
201static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
202	struct snd_kcontrol *k, int event)
203{
204	gpiod_set_value_cansleep(gpiod_mic, SND_SOC_DAPM_EVENT_ON(event));
205	return 0;
206}
207
208/* spitz machine dapm widgets */
209static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
210	SND_SOC_DAPM_HP("Headphone Jack", NULL),
211	SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
212	SND_SOC_DAPM_SPK("Ext Spk", NULL),
213	SND_SOC_DAPM_LINE("Line Jack", NULL),
214
215	/* headset is a mic and mono headphone */
216	SND_SOC_DAPM_HP("Headset Jack", NULL),
217};
218
219/* Spitz machine audio_map */
220static const struct snd_soc_dapm_route spitz_audio_map[] = {
221
222	/* headphone connected to LOUT1, ROUT1 */
223	{"Headphone Jack", NULL, "LOUT1"},
224	{"Headphone Jack", NULL, "ROUT1"},
225
226	/* headset connected to ROUT1 and LINPUT1 with bias (def below) */
227	{"Headset Jack", NULL, "ROUT1"},
228
229	/* ext speaker connected to LOUT2, ROUT2  */
230	{"Ext Spk", NULL, "ROUT2"},
231	{"Ext Spk", NULL, "LOUT2"},
232
233	/* mic is connected to input 1 - with bias */
234	{"LINPUT1", NULL, "Mic Bias"},
235	{"Mic Bias", NULL, "Mic Jack"},
236
237	/* line is connected to input 1 - no bias */
238	{"LINPUT1", NULL, "Line Jack"},
239};
240
241static const char * const jack_function[] = {"Headphone", "Mic", "Line",
242	"Headset", "Off"};
243static const char * const spk_function[] = {"On", "Off"};
244static const struct soc_enum spitz_enum[] = {
245	SOC_ENUM_SINGLE_EXT(5, jack_function),
246	SOC_ENUM_SINGLE_EXT(2, spk_function),
247};
248
249static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
250	SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
251		spitz_set_jack),
252	SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
253		spitz_set_spk),
254};
255
256/* spitz digital audio interface glue - connects codec <--> CPU */
257SND_SOC_DAILINK_DEFS(wm8750,
258	DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
259	DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
260	DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
261
262static struct snd_soc_dai_link spitz_dai = {
263	.name = "wm8750",
264	.stream_name = "WM8750",
265	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
266		   SND_SOC_DAIFMT_CBC_CFC,
267	.ops = &spitz_ops,
268	SND_SOC_DAILINK_REG(wm8750),
269};
270
271/* spitz audio machine driver */
272static struct snd_soc_card snd_soc_spitz = {
273	.name = "Spitz",
274	.owner = THIS_MODULE,
275	.dai_link = &spitz_dai,
276	.num_links = 1,
277
278	.controls = wm8750_spitz_controls,
279	.num_controls = ARRAY_SIZE(wm8750_spitz_controls),
280	.dapm_widgets = wm8750_dapm_widgets,
281	.num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
282	.dapm_routes = spitz_audio_map,
283	.num_dapm_routes = ARRAY_SIZE(spitz_audio_map),
284	.fully_routed = true,
285};
286
287static int spitz_probe(struct platform_device *pdev)
288{
289	struct snd_soc_card *card = &snd_soc_spitz;
290	int ret;
291
292	gpiod_mic = devm_gpiod_get(&pdev->dev, "mic", GPIOD_OUT_LOW);
293	if (IS_ERR(gpiod_mic))
294		return PTR_ERR(gpiod_mic);
295	gpiod_mute_l = devm_gpiod_get(&pdev->dev, "mute-l", GPIOD_OUT_LOW);
296	if (IS_ERR(gpiod_mute_l))
297		return PTR_ERR(gpiod_mute_l);
298	gpiod_mute_r = devm_gpiod_get(&pdev->dev, "mute-r", GPIOD_OUT_LOW);
299	if (IS_ERR(gpiod_mute_r))
300		return PTR_ERR(gpiod_mute_r);
301
302	card->dev = &pdev->dev;
303
304	ret = devm_snd_soc_register_card(&pdev->dev, card);
305	if (ret)
306		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
307			ret);
308
309	return ret;
310}
311
312static struct platform_driver spitz_driver = {
313	.driver		= {
314		.name	= "spitz-audio",
315		.pm     = &snd_soc_pm_ops,
316	},
317	.probe		= spitz_probe,
318};
319
320module_platform_driver(spitz_driver);
321
322MODULE_AUTHOR("Richard Purdie");
323MODULE_DESCRIPTION("ALSA SoC Spitz");
324MODULE_LICENSE("GPL");
325MODULE_ALIAS("platform:spitz-audio");