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Linux/sound/soc/intel/mfld_machine.c

  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 
 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 
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 
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 
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 
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 
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 
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_codec_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                 .name = "Medfield Compress",
323                 .stream_name = "Speaker",
324                 .cpu_dai_name = "Compress-cpu-dai",
325                 .codec_dai_name = "SN95031 Speaker",
326                 .codec_name = "sn95031",
327                 .platform_name = "sst-platform",
328                 .init = NULL,
329         },
330 };
331 
332 /* SoC card */
333 static struct snd_soc_card snd_soc_card_mfld = {
334         .name = "medfield_audio",
335         .owner = THIS_MODULE,
336         .dai_link = mfld_msic_dailink,
337         .num_links = ARRAY_SIZE(mfld_msic_dailink),
338 };
339 
340 static irqreturn_t snd_mfld_jack_intr_handler(int irq, void *dev)
341 {
342         struct mfld_mc_private *mc_private = (struct mfld_mc_private *) dev;
343 
344         memcpy_fromio(&mc_private->interrupt_status,
345                         ((void *)(mc_private->int_base)),
346                         sizeof(u8));
347         return IRQ_WAKE_THREAD;
348 }
349 
350 static irqreturn_t snd_mfld_jack_detection(int irq, void *data)
351 {
352         struct mfld_mc_private *mc_drv_ctx = (struct mfld_mc_private *) data;
353 
354         if (mfld_jack.codec == NULL)
355                 return IRQ_HANDLED;
356         mfld_jack_check(mc_drv_ctx->interrupt_status);
357 
358         return IRQ_HANDLED;
359 }
360 
361 static int snd_mfld_mc_probe(struct platform_device *pdev)
362 {
363         int ret_val = 0, irq;
364         struct mfld_mc_private *mc_drv_ctx;
365         struct resource *irq_mem;
366 
367         pr_debug("snd_mfld_mc_probe called\n");
368 
369         /* retrive the irq number */
370         irq = platform_get_irq(pdev, 0);
371 
372         /* audio interrupt base of SRAM location where
373          * interrupts are stored by System FW */
374         mc_drv_ctx = devm_kzalloc(&pdev->dev, sizeof(*mc_drv_ctx), GFP_ATOMIC);
375         if (!mc_drv_ctx) {
376                 pr_err("allocation failed\n");
377                 return -ENOMEM;
378         }
379 
380         irq_mem = platform_get_resource_byname(
381                                 pdev, IORESOURCE_MEM, "IRQ_BASE");
382         if (!irq_mem) {
383                 pr_err("no mem resource given\n");
384                 return -ENODEV;
385         }
386         mc_drv_ctx->int_base = devm_ioremap_nocache(&pdev->dev, irq_mem->start,
387                                                     resource_size(irq_mem));
388         if (!mc_drv_ctx->int_base) {
389                 pr_err("Mapping of cache failed\n");
390                 return -ENOMEM;
391         }
392         /* register for interrupt */
393         ret_val = devm_request_threaded_irq(&pdev->dev, irq,
394                         snd_mfld_jack_intr_handler,
395                         snd_mfld_jack_detection,
396                         IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
397         if (ret_val) {
398                 pr_err("cannot register IRQ\n");
399                 return ret_val;
400         }
401         /* register the soc card */
402         snd_soc_card_mfld.dev = &pdev->dev;
403         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_mfld);
404         if (ret_val) {
405                 pr_debug("snd_soc_register_card failed %d\n", ret_val);
406                 return ret_val;
407         }
408         platform_set_drvdata(pdev, mc_drv_ctx);
409         pr_debug("successfully exited probe\n");
410         return 0;
411 }
412 
413 static struct platform_driver snd_mfld_mc_driver = {
414         .driver = {
415                 .owner = THIS_MODULE,
416                 .name = "msic_audio",
417         },
418         .probe = snd_mfld_mc_probe,
419 };
420 
421 module_platform_driver(snd_mfld_mc_driver);
422 
423 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
424 MODULE_AUTHOR("Vinod Koul <vinod.koul@intel.com>");
425 MODULE_AUTHOR("Harsha Priya <priya.harsha@intel.com>");
426 MODULE_LICENSE("GPL v2");
427 MODULE_ALIAS("platform:msic-audio");
428 

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