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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
43enum 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
54static unsigned int hs_switch;
55static unsigned int lo_dac;
56static struct snd_soc_codec *mfld_codec;
57
58struct mfld_mc_private {
59 void __iomem *int_base;
60 u8 interrupt_status;
61};
62
63struct snd_soc_jack mfld_jack;
64
65/*Headset jack detection DAPM pins */
66static 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 */
78static 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 */
84static const char *headset_switch_text[] = {"Earpiece", "Headset"};
85
86static const char *lo_text[] = {"Vibra", "Headset", "IHF", "None"};
87
88static const struct soc_enum headset_enum =
89 SOC_ENUM_SINGLE_EXT(2, headset_switch_text);
90
91static const struct soc_enum lo_enum =
92 SOC_ENUM_SINGLE_EXT(4, lo_text);
93
94static 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
101static 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
131static 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
148static 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
155static 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
209static 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
216static const struct snd_soc_dapm_widget mfld_widgets[] = {
217 SND_SOC_DAPM_HP("Headphones", NULL),
218 SND_SOC_DAPM_MIC("Mic", NULL),
219};
220
221static const struct snd_soc_dapm_route mfld_map[] = {
222 {"Headphones", NULL, "HPOUTR"},
223 {"Headphones", NULL, "HPOUTL"},
224 {"Mic", NULL, "AMIC1"},
225};
226
227static void mfld_jack_check(unsigned int intr_status)
228{
229 struct mfld_jack_data jack_data;
230
231 jack_data.mfld_jack = &mfld_jack;
232 jack_data.intr_id = intr_status;
233
234 sn95031_jack_detection(&jack_data);
235 /* TODO: add american headset detection post gpiolib support */
236}
237
238static int mfld_init(struct snd_soc_pcm_runtime *runtime)
239{
240 struct snd_soc_dapm_context *dapm = &runtime->card->dapm;
241 int ret_val;
242
243 mfld_codec = runtime->codec;
244
245 /* default is earpiece pin, userspace sets it explcitly */
246 snd_soc_dapm_disable_pin(dapm, "Headphones");
247 /* default is lineout NC, userspace sets it explcitly */
248 snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
249 snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
250 lo_dac = 3;
251 hs_switch = 0;
252 /* we dont use linein in this so set to NC */
253 snd_soc_dapm_disable_pin(dapm, "LINEINL");
254 snd_soc_dapm_disable_pin(dapm, "LINEINR");
255
256 /* Headset and button jack detection */
257 ret_val = snd_soc_jack_new(mfld_codec, "Intel(R) MID Audio Jack",
258 SND_JACK_HEADSET | SND_JACK_BTN_0 |
259 SND_JACK_BTN_1, &mfld_jack);
260 if (ret_val) {
261 pr_err("jack creation failed\n");
262 return ret_val;
263 }
264
265 ret_val = snd_soc_jack_add_pins(&mfld_jack,
266 ARRAY_SIZE(mfld_jack_pins), mfld_jack_pins);
267 if (ret_val) {
268 pr_err("adding jack pins failed\n");
269 return ret_val;
270 }
271 ret_val = snd_soc_jack_add_zones(&mfld_jack,
272 ARRAY_SIZE(mfld_zones), mfld_zones);
273 if (ret_val) {
274 pr_err("adding jack zones failed\n");
275 return ret_val;
276 }
277
278 /* we want to check if anything is inserted at boot,
279 * so send a fake event to codec and it will read adc
280 * to find if anything is there or not */
281 mfld_jack_check(MFLD_JACK_INSERT);
282 return ret_val;
283}
284
285static struct snd_soc_dai_link mfld_msic_dailink[] = {
286 {
287 .name = "Medfield Headset",
288 .stream_name = "Headset",
289 .cpu_dai_name = "Headset-cpu-dai",
290 .codec_dai_name = "SN95031 Headset",
291 .codec_name = "sn95031",
292 .platform_name = "sst-platform",
293 .init = mfld_init,
294 },
295 {
296 .name = "Medfield Speaker",
297 .stream_name = "Speaker",
298 .cpu_dai_name = "Speaker-cpu-dai",
299 .codec_dai_name = "SN95031 Speaker",
300 .codec_name = "sn95031",
301 .platform_name = "sst-platform",
302 .init = NULL,
303 },
304 {
305 .name = "Medfield Vibra",
306 .stream_name = "Vibra1",
307 .cpu_dai_name = "Vibra1-cpu-dai",
308 .codec_dai_name = "SN95031 Vibra1",
309 .codec_name = "sn95031",
310 .platform_name = "sst-platform",
311 .init = NULL,
312 },
313 {
314 .name = "Medfield Haptics",
315 .stream_name = "Vibra2",
316 .cpu_dai_name = "Vibra2-cpu-dai",
317 .codec_dai_name = "SN95031 Vibra2",
318 .codec_name = "sn95031",
319 .platform_name = "sst-platform",
320 .init = NULL,
321 },
322 {
323 .name = "Medfield Compress",
324 .stream_name = "Speaker",
325 .cpu_dai_name = "Compress-cpu-dai",
326 .codec_dai_name = "SN95031 Speaker",
327 .codec_name = "sn95031",
328 .platform_name = "sst-platform",
329 .init = NULL,
330 },
331};
332
333/* SoC card */
334static struct snd_soc_card snd_soc_card_mfld = {
335 .name = "medfield_audio",
336 .owner = THIS_MODULE,
337 .dai_link = mfld_msic_dailink,
338 .num_links = ARRAY_SIZE(mfld_msic_dailink),
339
340 .controls = mfld_snd_controls,
341 .num_controls = ARRAY_SIZE(mfld_snd_controls),
342 .dapm_widgets = mfld_widgets,
343 .num_dapm_widgets = ARRAY_SIZE(mfld_widgets),
344 .dapm_routes = mfld_map,
345 .num_dapm_routes = ARRAY_SIZE(mfld_map),
346};
347
348static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
349{
350 struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
351
352 memcpy_fromio(&mc_private->interrupt_status,
353 ((void *)(mc_private->int_base)),
354 sizeof(u8));
355 return IRQ_WAKE_THREAD;
356}
357
358static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
359{
360 struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
361
362 if (mfld_jack.codec == NULL)
363 return IRQ_HANDLED;
364 mfld_jack_check(mc_drv_ctx->interrupt_status);
365
366 return IRQ_HANDLED;
367}
368
369static int snd_mfld_mc_probe(struct platform_device *pdev)
370{
371 int ret_val = 0, irq;
372 struct mfld_mc_private *mc_drv_ctx;
373 struct resource *irq_mem;
374
375 pr_debug("snd_mfld_mc_probe called\n");
376
377 /* retrive the irq number */
378 irq = platform_get_irq(pdev, 0);
379
380 /* audio interrupt base of SRAM location where
381 * interrupts are stored by System FW */
382 mc_drv_ctx = devm_kzalloc(&pdev->dev, sizeof(*mc_drv_ctx), GFP_ATOMIC);
383 if (!mc_drv_ctx) {
384 pr_err("allocation failed\n");
385 return -ENOMEM;
386 }
387
388 irq_mem = platform_get_resource_byname(
389 pdev, IORESOURCE_MEM, "IRQ_BASE");
390 if (!irq_mem) {
391 pr_err("no mem resource given\n");
392 return -ENODEV;
393 }
394 mc_drv_ctx->int_base = devm_ioremap_nocache(&pdev->dev, irq_mem->start,
395 resource_size(irq_mem));
396 if (!mc_drv_ctx->int_base) {
397 pr_err("Mapping of cache failed\n");
398 return -ENOMEM;
399 }
400 /* register for interrupt */
401 ret_val = devm_request_threaded_irq(&pdev->dev, irq,
402 snd_mfld_jack_intr_handler,
403 snd_mfld_jack_detection,
404 IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
405 if (ret_val) {
406 pr_err("cannot register IRQ\n");
407 return ret_val;
408 }
409 /* register the soc card */
410 snd_soc_card_mfld.dev = &pdev->dev;
411 ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_mfld);
412 if (ret_val) {
413 pr_debug("snd_soc_register_card failed %d\n", ret_val);
414 return ret_val;
415 }
416 platform_set_drvdata(pdev, mc_drv_ctx);
417 pr_debug("successfully exited probe\n");
418 return 0;
419}
420
421static struct platform_driver snd_mfld_mc_driver = {
422 .driver = {
423 .owner = THIS_MODULE,
424 .name = "msic_audio",
425 },
426 .probe = snd_mfld_mc_probe,
427};
428
429module_platform_driver(snd_mfld_mc_driver);
430
431MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
432MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
433MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
434MODULE_LICENSE("GPL v2");
435MODULE_ALIAS("platform:msic-audio");