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
37 static int spitz_jack_func;
38 static int spitz_spk_func;
39 static struct gpio_desc *gpiod_mic, *gpiod_mute_l, *gpiod_mute_r;
40
spitz_ext_control(struct snd_soc_dapm_context * dapm)41 static 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
spitz_startup(struct snd_pcm_substream * substream)105 static int spitz_startup(struct snd_pcm_substream *substream)
106 {
107 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
108
109 /* check the jack status at stream startup */
110 spitz_ext_control(&rtd->card->dapm);
111
112 return 0;
113 }
114
spitz_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)115 static int spitz_hw_params(struct snd_pcm_substream *substream,
116 struct snd_pcm_hw_params *params)
117 {
118 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
119 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
120 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
121 unsigned int clk = 0;
122 int ret = 0;
123
124 switch (params_rate(params)) {
125 case 8000:
126 case 16000:
127 case 48000:
128 case 96000:
129 clk = 12288000;
130 break;
131 case 11025:
132 case 22050:
133 case 44100:
134 clk = 11289600;
135 break;
136 }
137
138 /* set the codec system clock for DAC and ADC */
139 ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
140 SND_SOC_CLOCK_IN);
141 if (ret < 0)
142 return ret;
143
144 /* set the I2S system clock as input (unused) */
145 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
146 SND_SOC_CLOCK_IN);
147 if (ret < 0)
148 return ret;
149
150 return 0;
151 }
152
153 static const struct snd_soc_ops spitz_ops = {
154 .startup = spitz_startup,
155 .hw_params = spitz_hw_params,
156 };
157
spitz_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)158 static int spitz_get_jack(struct snd_kcontrol *kcontrol,
159 struct snd_ctl_elem_value *ucontrol)
160 {
161 ucontrol->value.enumerated.item[0] = spitz_jack_func;
162 return 0;
163 }
164
spitz_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)165 static int spitz_set_jack(struct snd_kcontrol *kcontrol,
166 struct snd_ctl_elem_value *ucontrol)
167 {
168 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
169
170 if (spitz_jack_func == ucontrol->value.enumerated.item[0])
171 return 0;
172
173 spitz_jack_func = ucontrol->value.enumerated.item[0];
174 spitz_ext_control(&card->dapm);
175 return 1;
176 }
177
spitz_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)178 static int spitz_get_spk(struct snd_kcontrol *kcontrol,
179 struct snd_ctl_elem_value *ucontrol)
180 {
181 ucontrol->value.enumerated.item[0] = spitz_spk_func;
182 return 0;
183 }
184
spitz_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)185 static int spitz_set_spk(struct snd_kcontrol *kcontrol,
186 struct snd_ctl_elem_value *ucontrol)
187 {
188 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
189
190 if (spitz_spk_func == ucontrol->value.enumerated.item[0])
191 return 0;
192
193 spitz_spk_func = ucontrol->value.enumerated.item[0];
194 spitz_ext_control(&card->dapm);
195 return 1;
196 }
197
spitz_mic_bias(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)198 static int spitz_mic_bias(struct snd_soc_dapm_widget *w,
199 struct snd_kcontrol *k, int event)
200 {
201 gpiod_set_value_cansleep(gpiod_mic, SND_SOC_DAPM_EVENT_ON(event));
202 return 0;
203 }
204
205 /* spitz machine dapm widgets */
206 static const struct snd_soc_dapm_widget wm8750_dapm_widgets[] = {
207 SND_SOC_DAPM_HP("Headphone Jack", NULL),
208 SND_SOC_DAPM_MIC("Mic Jack", spitz_mic_bias),
209 SND_SOC_DAPM_SPK("Ext Spk", NULL),
210 SND_SOC_DAPM_LINE("Line Jack", NULL),
211
212 /* headset is a mic and mono headphone */
213 SND_SOC_DAPM_HP("Headset Jack", NULL),
214 };
215
216 /* Spitz machine audio_map */
217 static const struct snd_soc_dapm_route spitz_audio_map[] = {
218
219 /* headphone connected to LOUT1, ROUT1 */
220 {"Headphone Jack", NULL, "LOUT1"},
221 {"Headphone Jack", NULL, "ROUT1"},
222
223 /* headset connected to ROUT1 and LINPUT1 with bias (def below) */
224 {"Headset Jack", NULL, "ROUT1"},
225
226 /* ext speaker connected to LOUT2, ROUT2 */
227 {"Ext Spk", NULL, "ROUT2"},
228 {"Ext Spk", NULL, "LOUT2"},
229
230 /* mic is connected to input 1 - with bias */
231 {"LINPUT1", NULL, "Mic Bias"},
232 {"Mic Bias", NULL, "Mic Jack"},
233
234 /* line is connected to input 1 - no bias */
235 {"LINPUT1", NULL, "Line Jack"},
236 };
237
238 static const char * const jack_function[] = {"Headphone", "Mic", "Line",
239 "Headset", "Off"};
240 static const char * const spk_function[] = {"On", "Off"};
241 static const struct soc_enum spitz_enum[] = {
242 SOC_ENUM_SINGLE_EXT(5, jack_function),
243 SOC_ENUM_SINGLE_EXT(2, spk_function),
244 };
245
246 static const struct snd_kcontrol_new wm8750_spitz_controls[] = {
247 SOC_ENUM_EXT("Jack Function", spitz_enum[0], spitz_get_jack,
248 spitz_set_jack),
249 SOC_ENUM_EXT("Speaker Function", spitz_enum[1], spitz_get_spk,
250 spitz_set_spk),
251 };
252
253 /* spitz digital audio interface glue - connects codec <--> CPU */
254 SND_SOC_DAILINK_DEFS(wm8750,
255 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
256 DAILINK_COMP_ARRAY(COMP_CODEC("wm8750.0-001b", "wm8750-hifi")),
257 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
258
259 static struct snd_soc_dai_link spitz_dai = {
260 .name = "wm8750",
261 .stream_name = "WM8750",
262 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
263 SND_SOC_DAIFMT_CBS_CFS,
264 .ops = &spitz_ops,
265 SND_SOC_DAILINK_REG(wm8750),
266 };
267
268 /* spitz audio machine driver */
269 static struct snd_soc_card snd_soc_spitz = {
270 .name = "Spitz",
271 .owner = THIS_MODULE,
272 .dai_link = &spitz_dai,
273 .num_links = 1,
274
275 .controls = wm8750_spitz_controls,
276 .num_controls = ARRAY_SIZE(wm8750_spitz_controls),
277 .dapm_widgets = wm8750_dapm_widgets,
278 .num_dapm_widgets = ARRAY_SIZE(wm8750_dapm_widgets),
279 .dapm_routes = spitz_audio_map,
280 .num_dapm_routes = ARRAY_SIZE(spitz_audio_map),
281 .fully_routed = true,
282 };
283
spitz_probe(struct platform_device * pdev)284 static int spitz_probe(struct platform_device *pdev)
285 {
286 struct snd_soc_card *card = &snd_soc_spitz;
287 int ret;
288
289 gpiod_mic = devm_gpiod_get(&pdev->dev, "mic", GPIOD_OUT_LOW);
290 if (IS_ERR(gpiod_mic))
291 return PTR_ERR(gpiod_mic);
292 gpiod_mute_l = devm_gpiod_get(&pdev->dev, "mute-l", GPIOD_OUT_LOW);
293 if (IS_ERR(gpiod_mute_l))
294 return PTR_ERR(gpiod_mute_l);
295 gpiod_mute_r = devm_gpiod_get(&pdev->dev, "mute-r", GPIOD_OUT_LOW);
296 if (IS_ERR(gpiod_mute_r))
297 return PTR_ERR(gpiod_mute_r);
298
299 card->dev = &pdev->dev;
300
301 ret = devm_snd_soc_register_card(&pdev->dev, card);
302 if (ret)
303 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
304 ret);
305
306 return ret;
307 }
308
309 static struct platform_driver spitz_driver = {
310 .driver = {
311 .name = "spitz-audio",
312 .pm = &snd_soc_pm_ops,
313 },
314 .probe = spitz_probe,
315 };
316
317 module_platform_driver(spitz_driver);
318
319 MODULE_AUTHOR("Richard Purdie");
320 MODULE_DESCRIPTION("ALSA SoC Spitz");
321 MODULE_LICENSE("GPL");
322 MODULE_ALIAS("platform:spitz-audio");
323