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mfld_machine.c
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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 <[email protected]>
6  * Author: Harsha Priya <[email protected]>
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 
45  /* mic bias volutage range for Headphones*/
46  MFLD_MV_HP = 400,
47  /* mic bias volutage range for American Headset*/
49  /* mic bias volutage range for Headset*/
50  MFLD_MV_HS = 2000,
52 };
53 
54 static unsigned int hs_switch;
55 static unsigned int lo_dac;
56 
60 };
61 
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[] = {
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",
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  }
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 __devinit 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 = kzalloc(sizeof(*mc_drv_ctx), GFP_ATOMIC);
375  if (!mc_drv_ctx) {
376  pr_err("allocation failed\n");
377  return -ENOMEM;
378  }
379 
381  pdev, IORESOURCE_MEM, "IRQ_BASE");
382  if (!irq_mem) {
383  pr_err("no mem resource given\n");
384  ret_val = -ENODEV;
385  goto unalloc;
386  }
387  mc_drv_ctx->int_base = ioremap_nocache(irq_mem->start,
388  resource_size(irq_mem));
389  if (!mc_drv_ctx->int_base) {
390  pr_err("Mapping of cache failed\n");
391  ret_val = -ENOMEM;
392  goto unalloc;
393  }
394  /* register for interrupt */
395  ret_val = request_threaded_irq(irq, snd_mfld_jack_intr_handler,
396  snd_mfld_jack_detection,
397  IRQF_SHARED, pdev->dev.driver->name, mc_drv_ctx);
398  if (ret_val) {
399  pr_err("cannot register IRQ\n");
400  goto unalloc;
401  }
402  /* register the soc card */
403  snd_soc_card_mfld.dev = &pdev->dev;
404  ret_val = snd_soc_register_card(&snd_soc_card_mfld);
405  if (ret_val) {
406  pr_debug("snd_soc_register_card failed %d\n", ret_val);
407  goto freeirq;
408  }
409  platform_set_drvdata(pdev, mc_drv_ctx);
410  pr_debug("successfully exited probe\n");
411  return ret_val;
412 
413 freeirq:
414  free_irq(irq, mc_drv_ctx);
415 unalloc:
416  kfree(mc_drv_ctx);
417  return ret_val;
418 }
419 
420 static int __devexit snd_mfld_mc_remove(struct platform_device *pdev)
421 {
422  struct mfld_mc_private *mc_drv_ctx = platform_get_drvdata(pdev);
423 
424  pr_debug("snd_mfld_mc_remove called\n");
425  free_irq(platform_get_irq(pdev, 0), mc_drv_ctx);
426  snd_soc_unregister_card(&snd_soc_card_mfld);
427  kfree(mc_drv_ctx);
428  platform_set_drvdata(pdev, NULL);
429  return 0;
430 }
431 
432 static struct platform_driver snd_mfld_mc_driver = {
433  .driver = {
434  .owner = THIS_MODULE,
435  .name = "msic_audio",
436  },
437  .probe = snd_mfld_mc_probe,
438  .remove = __devexit_p(snd_mfld_mc_remove),
439 };
440 
441 module_platform_driver(snd_mfld_mc_driver);
442 
443 MODULE_DESCRIPTION("ASoC Intel(R) MID Machine driver");
444 MODULE_AUTHOR("Vinod Koul <[email protected]>");
445 MODULE_AUTHOR("Harsha Priya <[email protected]>");
446 MODULE_LICENSE("GPL v2");
447 MODULE_ALIAS("platform:msic-audio");