1 /*
2 * mfld_machine.c - ASoc Machine driver for Intel Medfield MID platform
3 *
4 * Copyright (C) 2010 Intel Corp
5 * Author: Vinod Koul <vinod.koul@intel.com>
6 * Author: Harsha Priya <priya.harsha@intel.com>
7 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 */
24
25 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
26
27 #include <linux/init.h>
28 #include <linux/device.h>
29 #include <linux/slab.h>
30 #include <linux/io.h>
31 #include <linux/module.h>
32 #include <sound/pcm.h>
33 #include <sound/pcm_params.h>
34 #include <sound/soc.h>
35 #include <sound/jack.h>
36 #include "../codecs/sn95031.h"
37
38 #define MID_MONO 1
39 #define MID_STEREO 2
40 #define MID_MAX_CAP 5
41 #define MFLD_JACK_INSERT 0x04
42
43 enum soc_mic_bias_zones {
44 MFLD_MV_START = 0,
45 /* mic bias volutage range for Headphones*/
46 MFLD_MV_HP = 400,
47 /* mic bias volutage range for American Headset*/
48 MFLD_MV_AM_HS = 650,
49 /* mic bias volutage range for Headset*/
50 MFLD_MV_HS = 2000,
51 MFLD_MV_UNDEFINED,
52 };
53
54 static unsigned int hs_switch;
55 static unsigned int lo_dac;
56 static struct snd_soc_codec *mfld_codec;
57
58 struct mfld_mc_private {
59 void __iomem *int_base;
60 u8 interrupt_status;
61 };
62
63 struct snd_soc_jack mfld_jack;
64
65 /*Headset jack detection DAPM pins */
66 static struct snd_soc_jack_pin mfld_jack_pins[] = {
67 {
68 .pin = "Headphones",
69 .mask = SND_JACK_HEADPHONE,
70 },
71 {
72 .pin = "AMIC1",
73 .mask = SND_JACK_MICROPHONE,
74 },
75 };
76
77 /* jack detection voltage zones */
78 static struct snd_soc_jack_zone mfld_zones[] = {
79 {MFLD_MV_START, MFLD_MV_AM_HS, SND_JACK_HEADPHONE},
80 {MFLD_MV_AM_HS, MFLD_MV_HS, SND_JACK_HEADSET},
81 };
82
83 /* sound card controls */
84 static const char *headset_switch_text[] = {"Earpiece", "Headset"};
85
86 static const char *lo_text[] = {"Vibra", "Headset", "IHF", "None"};
87
88 static const struct soc_enum headset_enum =
89 SOC_ENUM_SINGLE_EXT(2, headset_switch_text);
90
91 static const struct soc_enum lo_enum =
92 SOC_ENUM_SINGLE_EXT(4, lo_text);
93
headset_get_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)94 static int headset_get_switch(struct snd_kcontrol *kcontrol,
95 struct snd_ctl_elem_value *ucontrol)
96 {
97 ucontrol->value.integer.value[0] = hs_switch;
98 return 0;
99 }
100
headset_set_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)101 static int headset_set_switch(struct snd_kcontrol *kcontrol,
102 struct snd_ctl_elem_value *ucontrol)
103 {
104 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
105 struct snd_soc_dapm_context *dapm = &card->dapm;
106
107 if (ucontrol->value.integer.value[0] == hs_switch)
108 return 0;
109
110 snd_soc_dapm_mutex_lock(dapm);
111
112 if (ucontrol->value.integer.value[0]) {
113 pr_debug("hs_set HS path\n");
114 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
115 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
116 } else {
117 pr_debug("hs_set EP path\n");
118 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
119 snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
120 }
121
122 snd_soc_dapm_sync_unlocked(dapm);
123
124 snd_soc_dapm_mutex_unlock(dapm);
125
126 hs_switch = ucontrol->value.integer.value[0];
127
128 return 0;
129 }
130
lo_enable_out_pins(struct snd_soc_dapm_context * dapm)131 static void lo_enable_out_pins(struct snd_soc_dapm_context *dapm)
132 {
133 snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTL");
134 snd_soc_dapm_enable_pin_unlocked(dapm, "IHFOUTR");
135 snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTL");
136 snd_soc_dapm_enable_pin_unlocked(dapm, "LINEOUTR");
137 snd_soc_dapm_enable_pin_unlocked(dapm, "VIB1OUT");
138 snd_soc_dapm_enable_pin_unlocked(dapm, "VIB2OUT");
139 if (hs_switch) {
140 snd_soc_dapm_enable_pin_unlocked(dapm, "Headphones");
141 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
142 } else {
143 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
144 snd_soc_dapm_enable_pin_unlocked(dapm, "EPOUT");
145 }
146 }
147
lo_get_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)148 static int lo_get_switch(struct snd_kcontrol *kcontrol,
149 struct snd_ctl_elem_value *ucontrol)
150 {
151 ucontrol->value.integer.value[0] = lo_dac;
152 return 0;
153 }
154
lo_set_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)155 static int lo_set_switch(struct snd_kcontrol *kcontrol,
156 struct snd_ctl_elem_value *ucontrol)
157 {
158 struct snd_soc_card *card = snd_kcontrol_chip(kcontrol);
159 struct snd_soc_dapm_context *dapm = &card->dapm;
160
161 if (ucontrol->value.integer.value[0] == lo_dac)
162 return 0;
163
164 snd_soc_dapm_mutex_lock(dapm);
165
166 /* we dont want to work with last state of lineout so just enable all
167 * pins and then disable pins not required
168 */
169 lo_enable_out_pins(dapm);
170
171 switch (ucontrol->value.integer.value[0]) {
172 case 0:
173 pr_debug("set vibra path\n");
174 snd_soc_dapm_disable_pin_unlocked(dapm, "VIB1OUT");
175 snd_soc_dapm_disable_pin_unlocked(dapm, "VIB2OUT");
176 snd_soc_update_bits(mfld_codec, SN95031_LOCTL, 0x66, 0);
177 break;
178
179 case 1:
180 pr_debug("set hs path\n");
181 snd_soc_dapm_disable_pin_unlocked(dapm, "Headphones");
182 snd_soc_dapm_disable_pin_unlocked(dapm, "EPOUT");
183 snd_soc_update_bits(mfld_codec, SN95031_LOCTL, 0x66, 0x22);
184 break;
185
186 case 2:
187 pr_debug("set spkr path\n");
188 snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTL");
189 snd_soc_dapm_disable_pin_unlocked(dapm, "IHFOUTR");
190 snd_soc_update_bits(mfld_codec, SN95031_LOCTL, 0x66, 0x44);
191 break;
192
193 case 3:
194 pr_debug("set null path\n");
195 snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTL");
196 snd_soc_dapm_disable_pin_unlocked(dapm, "LINEOUTR");
197 snd_soc_update_bits(mfld_codec, SN95031_LOCTL, 0x66, 0x66);
198 break;
199 }
200
201 snd_soc_dapm_sync_unlocked(dapm);
202
203 snd_soc_dapm_mutex_unlock(dapm);
204
205 lo_dac = ucontrol->value.integer.value[0];
206 return 0;
207 }
208
209 static const struct snd_kcontrol_new mfld_snd_controls[] = {
210 SOC_ENUM_EXT("Playback Switch", headset_enum,
211 headset_get_switch, headset_set_switch),
212 SOC_ENUM_EXT("Lineout Mux", lo_enum,
213 lo_get_switch, lo_set_switch),
214 };
215
216 static const struct snd_soc_dapm_widget mfld_widgets[] = {
217 SND_SOC_DAPM_HP("Headphones", NULL),
218 SND_SOC_DAPM_MIC("Mic", NULL),
219 };
220
221 static const struct snd_soc_dapm_route mfld_map[] = {
222 {"Headphones", NULL, "HPOUTR"},
223 {"Headphones", NULL, "HPOUTL"},
224 {"Mic", NULL, "AMIC1"},
225 };
226
mfld_jack_check(unsigned int intr_status)227 static void mfld_jack_check(unsigned int intr_status)
228 {
229 struct mfld_jack_data jack_data;
230
231 if (!mfld_codec)
232 return;
233
234 jack_data.mfld_jack = &mfld_jack;
235 jack_data.intr_id = intr_status;
236
237 sn95031_jack_detection(mfld_codec, &jack_data);
238 /* TODO: add american headset detection post gpiolib support */
239 }
240
mfld_init(struct snd_soc_pcm_runtime * runtime)241 static int mfld_init(struct snd_soc_pcm_runtime *runtime)
242 {
243 struct snd_soc_dapm_context *dapm = &runtime->card->dapm;
244 int ret_val;
245
246 /* default is earpiece pin, userspace sets it explcitly */
247 snd_soc_dapm_disable_pin(dapm, "Headphones");
248 /* default is lineout NC, userspace sets it explcitly */
249 snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
250 snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
251 lo_dac = 3;
252 hs_switch = 0;
253 /* we dont use linein in this so set to NC */
254 snd_soc_dapm_disable_pin(dapm, "LINEINL");
255 snd_soc_dapm_disable_pin(dapm, "LINEINR");
256
257 /* Headset and button jack detection */
258 ret_val = snd_soc_card_jack_new(runtime->card,
259 "Intel(R) MID Audio Jack", SND_JACK_HEADSET |
260 SND_JACK_BTN_0 | SND_JACK_BTN_1, &mfld_jack,
261 mfld_jack_pins, ARRAY_SIZE(mfld_jack_pins));
262 if (ret_val) {
263 pr_err("jack creation failed\n");
264 return ret_val;
265 }
266
267 ret_val = snd_soc_jack_add_zones(&mfld_jack,
268 ARRAY_SIZE(mfld_zones), mfld_zones);
269 if (ret_val) {
270 pr_err("adding jack zones failed\n");
271 return ret_val;
272 }
273
274 mfld_codec = runtime->codec;
275
276 /* we want to check if anything is inserted at boot,
277 * so send a fake event to codec and it will read adc
278 * to find if anything is there or not */
279 mfld_jack_check(MFLD_JACK_INSERT);
280 return ret_val;
281 }
282
283 static struct snd_soc_dai_link mfld_msic_dailink[] = {
284 {
285 .name = "Medfield Headset",
286 .stream_name = "Headset",
287 .cpu_dai_name = "Headset-cpu-dai",
288 .codec_dai_name = "SN95031 Headset",
289 .codec_name = "sn95031",
290 .platform_name = "sst-platform",
291 .init = mfld_init,
292 },
293 {
294 .name = "Medfield Speaker",
295 .stream_name = "Speaker",
296 .cpu_dai_name = "Speaker-cpu-dai",
297 .codec_dai_name = "SN95031 Speaker",
298 .codec_name = "sn95031",
299 .platform_name = "sst-platform",
300 .init = NULL,
301 },
302 {
303 .name = "Medfield Vibra",
304 .stream_name = "Vibra1",
305 .cpu_dai_name = "Vibra1-cpu-dai",
306 .codec_dai_name = "SN95031 Vibra1",
307 .codec_name = "sn95031",
308 .platform_name = "sst-platform",
309 .init = NULL,
310 },
311 {
312 .name = "Medfield Haptics",
313 .stream_name = "Vibra2",
314 .cpu_dai_name = "Vibra2-cpu-dai",
315 .codec_dai_name = "SN95031 Vibra2",
316 .codec_name = "sn95031",
317 .platform_name = "sst-platform",
318 .init = NULL,
319 },
320 {
321 .name = "Medfield Compress",
322 .stream_name = "Speaker",
323 .cpu_dai_name = "Compress-cpu-dai",
324 .codec_dai_name = "SN95031 Speaker",
325 .codec_name = "sn95031",
326 .platform_name = "sst-platform",
327 .init = NULL,
328 },
329 };
330
331 /* SoC card */
332 static struct snd_soc_card snd_soc_card_mfld = {
333 .name = "medfield_audio",
334 .owner = THIS_MODULE,
335 .dai_link = mfld_msic_dailink,
336 .num_links = ARRAY_SIZE(mfld_msic_dailink),
337
338 .controls = mfld_snd_controls,
339 .num_controls = ARRAY_SIZE(mfld_snd_controls),
340 .dapm_widgets = mfld_widgets,
341 .num_dapm_widgets = ARRAY_SIZE(mfld_widgets),
342 .dapm_routes = mfld_map,
343 .num_dapm_routes = ARRAY_SIZE(mfld_map),
344 };
345
snd_mfld_jack_intr_handler(int irq,void * dev)346 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
347 {
348 struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
349
350 memcpy_fromio(&mc_private->interrupt_status,
351 ((void *)(mc_private->int_base)),
352 sizeof(u8));
353 return IRQ_WAKE_THREAD;
354 }
355
snd_mfld_jack_detection(int irq,void * data)356 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
357 {
358 struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
359
360 mfld_jack_check(mc_drv_ctx->interrupt_status);
361
362 return IRQ_HANDLED;
363 }
364
snd_mfld_mc_probe(struct platform_device * pdev)365 static int snd_mfld_mc_probe(struct platform_device *pdev)
366 {
367 int ret_val = 0, irq;
368 struct mfld_mc_private *mc_drv_ctx;
369 struct resource *irq_mem;
370
371 pr_debug("snd_mfld_mc_probe called\n");
372
373 /* retrive the irq number */
374 irq = platform_get_irq(pdev, 0);
375
376 /* audio interrupt base of SRAM location where
377 * interrupts are stored by System FW */
378 mc_drv_ctx = devm_kzalloc(&pdev->dev, sizeof(*mc_drv_ctx), GFP_ATOMIC);
379 if (!mc_drv_ctx) {
380 pr_err("allocation failed\n");
381 return -ENOMEM;
382 }
383
384 irq_mem = platform_get_resource_byname(
385 pdev, IORESOURCE_MEM, "IRQ_BASE");
386 if (!irq_mem) {
387 pr_err("no mem resource given\n");
388 return -ENODEV;
389 }
390 mc_drv_ctx->int_base = devm_ioremap_nocache(&pdev->dev, irq_mem->start,
391 resource_size(irq_mem));
392 if (!mc_drv_ctx->int_base) {
393 pr_err("Mapping of cache failed\n");
394 return -ENOMEM;
395 }
396 /* register for interrupt */
397 ret_val = devm_request_threaded_irq(&pdev->dev, irq,
398 snd_mfld_jack_intr_handler,
399 snd_mfld_jack_detection,
400 IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
401 if (ret_val) {
402 pr_err("cannot register IRQ\n");
403 return ret_val;
404 }
405 /* register the soc card */
406 snd_soc_card_mfld.dev = &pdev->dev;
407 ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_mfld);
408 if (ret_val) {
409 pr_debug("snd_soc_register_card failed %d\n", ret_val);
410 return ret_val;
411 }
412 platform_set_drvdata(pdev, mc_drv_ctx);
413 pr_debug("successfully exited probe\n");
414 return 0;
415 }
416
417 static struct platform_driver snd_mfld_mc_driver = {
418 .driver = {
419 .name = "msic_audio",
420 },
421 .probe = snd_mfld_mc_probe,
422 };
423
424 module_platform_driver(snd_mfld_mc_driver);
425
426 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
427 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
428 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
429 MODULE_LICENSE("GPL v2");
430 MODULE_ALIAS("platform:msic-audio");
431