1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * poodle.c -- SoC audio for Poodle
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/i2c.h>
16 #include <linux/interrupt.h>
17 #include <linux/platform_device.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 <asm/hardware/locomo.h>
24 #include <linux/platform_data/asoc-pxa.h>
25 #include <linux/platform_data/asoc-poodle.h>
26
27 #include "../codecs/wm8731.h"
28 #include "pxa2xx-i2s.h"
29
30 #define POODLE_HP 1
31 #define POODLE_HP_OFF 0
32 #define POODLE_SPK_ON 1
33 #define POODLE_SPK_OFF 0
34
35 /* audio clock in Hz - rounded from 12.235MHz */
36 #define POODLE_AUDIO_CLOCK 12288000
37
38 static int poodle_jack_func;
39 static int poodle_spk_func;
40
41 static struct poodle_audio_platform_data *poodle_pdata;
42
poodle_ext_control(struct snd_soc_dapm_context * dapm)43 static void poodle_ext_control(struct snd_soc_dapm_context *dapm)
44 {
45 /* set up jack connection */
46 if (poodle_jack_func == POODLE_HP) {
47 /* set = unmute headphone */
48 locomo_gpio_write(poodle_pdata->locomo_dev,
49 poodle_pdata->gpio_mute_l, 1);
50 locomo_gpio_write(poodle_pdata->locomo_dev,
51 poodle_pdata->gpio_mute_r, 1);
52 snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
53 } else {
54 locomo_gpio_write(poodle_pdata->locomo_dev,
55 poodle_pdata->gpio_mute_l, 0);
56 locomo_gpio_write(poodle_pdata->locomo_dev,
57 poodle_pdata->gpio_mute_r, 0);
58 snd_soc_dapm_disable_pin(dapm, "Headphone Jack");
59 }
60
61 /* set the endpoints to their new connection states */
62 if (poodle_spk_func == POODLE_SPK_ON)
63 snd_soc_dapm_enable_pin(dapm, "Ext Spk");
64 else
65 snd_soc_dapm_disable_pin(dapm, "Ext Spk");
66
67 /* signal a DAPM event */
68 snd_soc_dapm_sync(dapm);
69 }
70
poodle_startup(struct snd_pcm_substream * substream)71 static int poodle_startup(struct snd_pcm_substream *substream)
72 {
73 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
74
75 /* check the jack status at stream startup */
76 poodle_ext_control(&rtd->card->dapm);
77
78 return 0;
79 }
80
81 /* we need to unmute the HP at shutdown as the mute burns power on poodle */
poodle_shutdown(struct snd_pcm_substream * substream)82 static void poodle_shutdown(struct snd_pcm_substream *substream)
83 {
84 /* set = unmute headphone */
85 locomo_gpio_write(poodle_pdata->locomo_dev,
86 poodle_pdata->gpio_mute_l, 1);
87 locomo_gpio_write(poodle_pdata->locomo_dev,
88 poodle_pdata->gpio_mute_r, 1);
89 }
90
poodle_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)91 static int poodle_hw_params(struct snd_pcm_substream *substream,
92 struct snd_pcm_hw_params *params)
93 {
94 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
95 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
96 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
97 unsigned int clk = 0;
98 int ret = 0;
99
100 switch (params_rate(params)) {
101 case 8000:
102 case 16000:
103 case 48000:
104 case 96000:
105 clk = 12288000;
106 break;
107 case 11025:
108 case 22050:
109 case 44100:
110 clk = 11289600;
111 break;
112 }
113
114 /* set the codec system clock for DAC and ADC */
115 ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_XTAL, clk,
116 SND_SOC_CLOCK_IN);
117 if (ret < 0)
118 return ret;
119
120 /* set the I2S system clock as input (unused) */
121 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
122 SND_SOC_CLOCK_IN);
123 if (ret < 0)
124 return ret;
125
126 return 0;
127 }
128
129 static const struct snd_soc_ops poodle_ops = {
130 .startup = poodle_startup,
131 .hw_params = poodle_hw_params,
132 .shutdown = poodle_shutdown,
133 };
134
poodle_get_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)135 static int poodle_get_jack(struct snd_kcontrol *kcontrol,
136 struct snd_ctl_elem_value *ucontrol)
137 {
138 ucontrol->value.enumerated.item[0] = poodle_jack_func;
139 return 0;
140 }
141
poodle_set_jack(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)142 static int poodle_set_jack(struct snd_kcontrol *kcontrol,
143 struct snd_ctl_elem_value *ucontrol)
144 {
145 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
146
147 if (poodle_jack_func == ucontrol->value.enumerated.item[0])
148 return 0;
149
150 poodle_jack_func = ucontrol->value.enumerated.item[0];
151 poodle_ext_control(&card->dapm);
152 return 1;
153 }
154
poodle_get_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)155 static int poodle_get_spk(struct snd_kcontrol *kcontrol,
156 struct snd_ctl_elem_value *ucontrol)
157 {
158 ucontrol->value.enumerated.item[0] = poodle_spk_func;
159 return 0;
160 }
161
poodle_set_spk(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)162 static int poodle_set_spk(struct snd_kcontrol *kcontrol,
163 struct snd_ctl_elem_value *ucontrol)
164 {
165 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
166
167 if (poodle_spk_func == ucontrol->value.enumerated.item[0])
168 return 0;
169
170 poodle_spk_func = ucontrol->value.enumerated.item[0];
171 poodle_ext_control(&card->dapm);
172 return 1;
173 }
174
poodle_amp_event(struct snd_soc_dapm_widget * w,struct snd_kcontrol * k,int event)175 static int poodle_amp_event(struct snd_soc_dapm_widget *w,
176 struct snd_kcontrol *k, int event)
177 {
178 if (SND_SOC_DAPM_EVENT_ON(event))
179 locomo_gpio_write(poodle_pdata->locomo_dev,
180 poodle_pdata->gpio_amp_on, 0);
181 else
182 locomo_gpio_write(poodle_pdata->locomo_dev,
183 poodle_pdata->gpio_amp_on, 1);
184
185 return 0;
186 }
187
188 /* poodle machine dapm widgets */
189 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
190 SND_SOC_DAPM_HP("Headphone Jack", NULL),
191 SND_SOC_DAPM_SPK("Ext Spk", poodle_amp_event),
192 SND_SOC_DAPM_MIC("Microphone", NULL),
193 };
194
195 /* Corgi machine connections to the codec pins */
196 static const struct snd_soc_dapm_route poodle_audio_map[] = {
197
198 /* headphone connected to LHPOUT1, RHPOUT1 */
199 {"Headphone Jack", NULL, "LHPOUT"},
200 {"Headphone Jack", NULL, "RHPOUT"},
201
202 /* speaker connected to LOUT, ROUT */
203 {"Ext Spk", NULL, "ROUT"},
204 {"Ext Spk", NULL, "LOUT"},
205
206 {"MICIN", NULL, "Microphone"},
207 };
208
209 static const char * const jack_function[] = {"Off", "Headphone"};
210 static const char * const spk_function[] = {"Off", "On"};
211 static const struct soc_enum poodle_enum[] = {
212 SOC_ENUM_SINGLE_EXT(2, jack_function),
213 SOC_ENUM_SINGLE_EXT(2, spk_function),
214 };
215
216 static const struct snd_kcontrol_new wm8731_poodle_controls[] = {
217 SOC_ENUM_EXT("Jack Function", poodle_enum[0], poodle_get_jack,
218 poodle_set_jack),
219 SOC_ENUM_EXT("Speaker Function", poodle_enum[1], poodle_get_spk,
220 poodle_set_spk),
221 };
222
223 /* poodle digital audio interface glue - connects codec <--> CPU */
224 SND_SOC_DAILINK_DEFS(wm8731,
225 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
226 DAILINK_COMP_ARRAY(COMP_CODEC("wm8731.0-001b", "wm8731-hifi")),
227 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
228
229 static struct snd_soc_dai_link poodle_dai = {
230 .name = "WM8731",
231 .stream_name = "WM8731",
232 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
233 SND_SOC_DAIFMT_CBS_CFS,
234 .ops = &poodle_ops,
235 SND_SOC_DAILINK_REG(wm8731),
236 };
237
238 /* poodle audio machine driver */
239 static struct snd_soc_card poodle = {
240 .name = "Poodle",
241 .dai_link = &poodle_dai,
242 .num_links = 1,
243 .owner = THIS_MODULE,
244
245 .controls = wm8731_poodle_controls,
246 .num_controls = ARRAY_SIZE(wm8731_poodle_controls),
247 .dapm_widgets = wm8731_dapm_widgets,
248 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets),
249 .dapm_routes = poodle_audio_map,
250 .num_dapm_routes = ARRAY_SIZE(poodle_audio_map),
251 .fully_routed = true,
252 };
253
poodle_probe(struct platform_device * pdev)254 static int poodle_probe(struct platform_device *pdev)
255 {
256 struct snd_soc_card *card = &poodle;
257 int ret;
258
259 poodle_pdata = pdev->dev.platform_data;
260 locomo_gpio_set_dir(poodle_pdata->locomo_dev,
261 poodle_pdata->gpio_amp_on, 0);
262 /* should we mute HP at startup - burning power ?*/
263 locomo_gpio_set_dir(poodle_pdata->locomo_dev,
264 poodle_pdata->gpio_mute_l, 0);
265 locomo_gpio_set_dir(poodle_pdata->locomo_dev,
266 poodle_pdata->gpio_mute_r, 0);
267
268 card->dev = &pdev->dev;
269
270 ret = devm_snd_soc_register_card(&pdev->dev, card);
271 if (ret)
272 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
273 ret);
274 return ret;
275 }
276
277 static struct platform_driver poodle_driver = {
278 .driver = {
279 .name = "poodle-audio",
280 .pm = &snd_soc_pm_ops,
281 },
282 .probe = poodle_probe,
283 };
284
285 module_platform_driver(poodle_driver);
286
287 /* Module information */
288 MODULE_AUTHOR("Richard Purdie");
289 MODULE_DESCRIPTION("ALSA SoC Poodle");
290 MODULE_LICENSE("GPL");
291 MODULE_ALIAS("platform:poodle-audio");
292
