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
57 struct mfld_mc_private {
58 void __iomem *int_base;
59 u8 interrupt_status;
60 };
61
62 struct snd_soc_jack mfld_jack;
63
64 /*Headset jack detection DAPM pins */
65 static struct snd_soc_jack_pin mfld_jack_pins[] = {
66 {
67 .pin = "Headphones",
68 .mask = SND_JACK_HEADPHONE,
69 },
70 {
71 .pin = "AMIC1",
72 .mask = SND_JACK_MICROPHONE,
73 },
74 };
75
76 /* jack detection voltage zones */
77 static struct snd_soc_jack_zone mfld_zones[] = {
78 {MFLD_MV_START, MFLD_MV_AM_HS, SND_JACK_HEADPHONE},
79 {MFLD_MV_AM_HS, MFLD_MV_HS, SND_JACK_HEADSET},
80 };
81
82 /* sound card controls */
83 static const char *headset_switch_text[] = {"Earpiece", "Headset"};
84
85 static const char *lo_text[] = {"Vibra", "Headset", "IHF", "None"};
86
87 static const struct soc_enum headset_enum =
88 SOC_ENUM_SINGLE_EXT(2, headset_switch_text);
89
90 static const struct soc_enum lo_enum =
91 SOC_ENUM_SINGLE_EXT(4, lo_text);
92
headset_get_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)93 static int headset_get_switch(struct snd_kcontrol *kcontrol,
94 struct snd_ctl_elem_value *ucontrol)
95 {
96 ucontrol->value.integer.value[0] = hs_switch;
97 return 0;
98 }
99
headset_set_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)100 static int headset_set_switch(struct snd_kcontrol *kcontrol,
101 struct snd_ctl_elem_value *ucontrol)
102 {
103 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
104
105 if (ucontrol->value.integer.value[0] == hs_switch)
106 return 0;
107
108 if (ucontrol->value.integer.value[0]) {
109 pr_debug("hs_set HS path\n");
110 snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
111 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
112 } else {
113 pr_debug("hs_set EP path\n");
114 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
115 snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
116 }
117 snd_soc_dapm_sync(&codec->dapm);
118 hs_switch = ucontrol->value.integer.value[0];
119
120 return 0;
121 }
122
lo_enable_out_pins(struct snd_soc_codec * codec)123 static void lo_enable_out_pins(struct snd_soc_codec *codec)
124 {
125 snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTL");
126 snd_soc_dapm_enable_pin(&codec->dapm, "IHFOUTR");
127 snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTL");
128 snd_soc_dapm_enable_pin(&codec->dapm, "LINEOUTR");
129 snd_soc_dapm_enable_pin(&codec->dapm, "VIB1OUT");
130 snd_soc_dapm_enable_pin(&codec->dapm, "VIB2OUT");
131 if (hs_switch) {
132 snd_soc_dapm_enable_pin(&codec->dapm, "Headphones");
133 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
134 } else {
135 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
136 snd_soc_dapm_enable_pin(&codec->dapm, "EPOUT");
137 }
138 }
139
lo_get_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)140 static int lo_get_switch(struct snd_kcontrol *kcontrol,
141 struct snd_ctl_elem_value *ucontrol)
142 {
143 ucontrol->value.integer.value[0] = lo_dac;
144 return 0;
145 }
146
lo_set_switch(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)147 static int lo_set_switch(struct snd_kcontrol *kcontrol,
148 struct snd_ctl_elem_value *ucontrol)
149 {
150 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
151
152 if (ucontrol->value.integer.value[0] == lo_dac)
153 return 0;
154
155 /* we dont want to work with last state of lineout so just enable all
156 * pins and then disable pins not required
157 */
158 lo_enable_out_pins(codec);
159 switch (ucontrol->value.integer.value[0]) {
160 case 0:
161 pr_debug("set vibra path\n");
162 snd_soc_dapm_disable_pin(&codec->dapm, "VIB1OUT");
163 snd_soc_dapm_disable_pin(&codec->dapm, "VIB2OUT");
164 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0);
165 break;
166
167 case 1:
168 pr_debug("set hs path\n");
169 snd_soc_dapm_disable_pin(&codec->dapm, "Headphones");
170 snd_soc_dapm_disable_pin(&codec->dapm, "EPOUT");
171 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x22);
172 break;
173
174 case 2:
175 pr_debug("set spkr path\n");
176 snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTL");
177 snd_soc_dapm_disable_pin(&codec->dapm, "IHFOUTR");
178 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x44);
179 break;
180
181 case 3:
182 pr_debug("set null path\n");
183 snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTL");
184 snd_soc_dapm_disable_pin(&codec->dapm, "LINEOUTR");
185 snd_soc_update_bits(codec, SN95031_LOCTL, 0x66, 0x66);
186 break;
187 }
188 snd_soc_dapm_sync(&codec->dapm);
189 lo_dac = ucontrol->value.integer.value[0];
190 return 0;
191 }
192
193 static const struct snd_kcontrol_new mfld_snd_controls[] = {
194 SOC_ENUM_EXT("Playback Switch", headset_enum,
195 headset_get_switch, headset_set_switch),
196 SOC_ENUM_EXT("Lineout Mux", lo_enum,
197 lo_get_switch, lo_set_switch),
198 };
199
200 static const struct snd_soc_dapm_widget mfld_widgets[] = {
201 SND_SOC_DAPM_HP("Headphones", NULL),
202 SND_SOC_DAPM_MIC("Mic", NULL),
203 };
204
205 static const struct snd_soc_dapm_route mfld_map[] = {
206 {"Headphones", NULL, "HPOUTR"},
207 {"Headphones", NULL, "HPOUTL"},
208 {"Mic", NULL, "AMIC1"},
209 };
210
mfld_jack_check(unsigned int intr_status)211 static void mfld_jack_check(unsigned int intr_status)
212 {
213 struct mfld_jack_data jack_data;
214
215 jack_data.mfld_jack = &mfld_jack;
216 jack_data.intr_id = intr_status;
217
218 sn95031_jack_detection(&jack_data);
219 /* TODO: add american headset detection post gpiolib support */
220 }
221
mfld_init(struct snd_soc_pcm_runtime * runtime)222 static int mfld_init(struct snd_soc_pcm_runtime *runtime)
223 {
224 struct snd_soc_codec *codec = runtime->codec;
225 struct snd_soc_dapm_context *dapm = &codec->dapm;
226 int ret_val;
227
228 /* Add jack sense widgets */
229 snd_soc_dapm_new_controls(dapm, mfld_widgets, ARRAY_SIZE(mfld_widgets));
230
231 /* Set up the map */
232 snd_soc_dapm_add_routes(dapm, mfld_map, ARRAY_SIZE(mfld_map));
233
234 /* always connected */
235 snd_soc_dapm_enable_pin(dapm, "Headphones");
236 snd_soc_dapm_enable_pin(dapm, "Mic");
237
238 ret_val = snd_soc_add_controls(codec, mfld_snd_controls,
239 ARRAY_SIZE(mfld_snd_controls));
240 if (ret_val) {
241 pr_err("soc_add_controls failed %d", ret_val);
242 return ret_val;
243 }
244 /* default is earpiece pin, userspace sets it explcitly */
245 snd_soc_dapm_disable_pin(dapm, "Headphones");
246 /* default is lineout NC, userspace sets it explcitly */
247 snd_soc_dapm_disable_pin(dapm, "LINEOUTL");
248 snd_soc_dapm_disable_pin(dapm, "LINEOUTR");
249 lo_dac = 3;
250 hs_switch = 0;
251 /* we dont use linein in this so set to NC */
252 snd_soc_dapm_disable_pin(dapm, "LINEINL");
253 snd_soc_dapm_disable_pin(dapm, "LINEINR");
254
255 /* Headset and button jack detection */
256 ret_val = snd_soc_jack_new(codec, "Intel(R) MID Audio Jack",
257 SND_JACK_HEADSET | SND_JACK_BTN_0 |
258 SND_JACK_BTN_1, &mfld_jack);
259 if (ret_val) {
260 pr_err("jack creation failed\n");
261 return ret_val;
262 }
263
264 ret_val = snd_soc_jack_add_pins(&mfld_jack,
265 ARRAY_SIZE(mfld_jack_pins), mfld_jack_pins);
266 if (ret_val) {
267 pr_err("adding jack pins failed\n");
268 return ret_val;
269 }
270 ret_val = snd_soc_jack_add_zones(&mfld_jack,
271 ARRAY_SIZE(mfld_zones), mfld_zones);
272 if (ret_val) {
273 pr_err("adding jack zones failed\n");
274 return ret_val;
275 }
276
277 /* we want to check if anything is inserted at boot,
278 * so send a fake event to codec and it will read adc
279 * to find if anything is there or not */
280 mfld_jack_check(MFLD_JACK_INSERT);
281 return ret_val;
282 }
283
284 static struct snd_soc_dai_link mfld_msic_dailink[] = {
285 {
286 .name = "Medfield Headset",
287 .stream_name = "Headset",
288 .cpu_dai_name = "Headset-cpu-dai",
289 .codec_dai_name = "SN95031 Headset",
290 .codec_name = "sn95031",
291 .platform_name = "sst-platform",
292 .init = mfld_init,
293 },
294 {
295 .name = "Medfield Speaker",
296 .stream_name = "Speaker",
297 .cpu_dai_name = "Speaker-cpu-dai",
298 .codec_dai_name = "SN95031 Speaker",
299 .codec_name = "sn95031",
300 .platform_name = "sst-platform",
301 .init = NULL,
302 },
303 {
304 .name = "Medfield Vibra",
305 .stream_name = "Vibra1",
306 .cpu_dai_name = "Vibra1-cpu-dai",
307 .codec_dai_name = "SN95031 Vibra1",
308 .codec_name = "sn95031",
309 .platform_name = "sst-platform",
310 .init = NULL,
311 },
312 {
313 .name = "Medfield Haptics",
314 .stream_name = "Vibra2",
315 .cpu_dai_name = "Vibra2-cpu-dai",
316 .codec_dai_name = "SN95031 Vibra2",
317 .codec_name = "sn95031",
318 .platform_name = "sst-platform",
319 .init = NULL,
320 },
321 };
322
323 /* SoC card */
324 static struct snd_soc_card snd_soc_card_mfld = {
325 .name = "medfield_audio",
326 .owner = THIS_MODULE,
327 .dai_link = mfld_msic_dailink,
328 .num_links = ARRAY_SIZE(mfld_msic_dailink),
329 };
330
snd_mfld_jack_intr_handler(int irq,void * dev)331 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
332 {
333 struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
334
335 memcpy_fromio(&mc_private->interrupt_status,
336 ((void *)(mc_private->int_base)),
337 sizeof(u8));
338 return IRQ_WAKE_THREAD;
339 }
340
snd_mfld_jack_detection(int irq,void * data)341 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
342 {
343 struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
344
345 if (mfld_jack.codec == NULL)
346 return IRQ_HANDLED;
347 mfld_jack_check(mc_drv_ctx->interrupt_status);
348
349 return IRQ_HANDLED;
350 }
351
snd_mfld_mc_probe(struct platform_device * pdev)352 static int __devinit snd_mfld_mc_probe(struct platform_device *pdev)
353 {
354 int ret_val = 0, irq;
355 struct mfld_mc_private *mc_drv_ctx;
356 struct resource *irq_mem;
357
358 pr_debug("snd_mfld_mc_probe called\n");
359
360 /* retrive the irq number */
361 irq = platform_get_irq(pdev, 0);
362
363 /* audio interrupt base of SRAM location where
364 * interrupts are stored by System FW */
365 mc_drv_ctx = kzalloc(sizeof(*mc_drv_ctx), GFP_ATOMIC);
366 if (!mc_drv_ctx) {
367 pr_err("allocation failed\n");
368 return -ENOMEM;
369 }
370
371 irq_mem = platform_get_resource_byname(
372 pdev, IORESOURCE_MEM, "IRQ_BASE");
373 if (!irq_mem) {
374 pr_err("no mem resource given\n");
375 ret_val = -ENODEV;
376 goto unalloc;
377 }
378 mc_drv_ctx->int_base = ioremap_nocache(irq_mem->start,
379 resource_size(irq_mem));
380 if (!mc_drv_ctx->int_base) {
381 pr_err("Mapping of cache failed\n");
382 ret_val = -ENOMEM;
383 goto unalloc;
384 }
385 /* register for interrupt */
386 ret_val = request_threaded_irq(irq, snd_mfld_jack_intr_handler,
387 snd_mfld_jack_detection,
388 IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
389 if (ret_val) {
390 pr_err("cannot register IRQ\n");
391 goto unalloc;
392 }
393 /* register the soc card */
394 snd_soc_card_mfld.dev = &pdev->dev;
395 ret_val = snd_soc_register_card(&snd_soc_card_mfld);
396 if (ret_val) {
397 pr_debug("snd_soc_register_card failed %d\n", ret_val);
398 goto freeirq;
399 }
400 platform_set_drvdata(pdev, mc_drv_ctx);
401 pr_debug("successfully exited probe\n");
402 return ret_val;
403
404 freeirq:
405 free_irq(irq, mc_drv_ctx);
406 unalloc:
407 kfree(mc_drv_ctx);
408 return ret_val;
409 }
410
snd_mfld_mc_remove(struct platform_device * pdev)411 static int __devexit snd_mfld_mc_remove(struct platform_device *pdev)
412 {
413 struct mfld_mc_private *mc_drv_ctx = platform_get_drvdata(pdev);
414
415 pr_debug("snd_mfld_mc_remove called\n");
416 free_irq(platform_get_irq(pdev, 0), mc_drv_ctx);
417 snd_soc_unregister_card(&snd_soc_card_mfld);
418 kfree(mc_drv_ctx);
419 platform_set_drvdata(pdev, NULL);
420 return 0;
421 }
422
423 static struct platform_driver snd_mfld_mc_driver = {
424 .driver = {
425 .owner = THIS_MODULE,
426 .name = "msic_audio",
427 },
428 .probe = snd_mfld_mc_probe,
429 .remove = __devexit_p(snd_mfld_mc_remove),
430 };
431
432 module_platform_driver(snd_mfld_mc_driver);
433
434 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
435 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
436 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
437 MODULE_LICENSE("GPL v2");
438 MODULE_ALIAS("platform:msic-audio");
439