1 /*
2 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * lpass-cpu.c -- ALSA SoC CPU DAI driver for QTi LPASS
14 */
15
16 #include <linux/clk.h>
17 #include <linux/kernel.h>
18 #include <linux/module.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/platform_device.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <linux/regmap.h>
25 #include <sound/soc.h>
26 #include <sound/soc-dai.h>
27 #include "lpass-lpaif-reg.h"
28 #include "lpass.h"
29
lpass_cpu_daiops_set_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)30 static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
31 unsigned int freq, int dir)
32 {
33 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
34 int ret;
35
36 ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
37 if (ret)
38 dev_err(dai->dev, "error setting mi2s osrclk to %u: %d\n",
39 freq, ret);
40
41 return ret;
42 }
43
lpass_cpu_daiops_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)44 static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
45 struct snd_soc_dai *dai)
46 {
47 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
48 int ret;
49
50 ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->driver->id]);
51 if (ret) {
52 dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
53 return ret;
54 }
55
56 ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
57 if (ret) {
58 dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
59 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
60 return ret;
61 }
62
63 return 0;
64 }
65
lpass_cpu_daiops_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)66 static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
67 struct snd_soc_dai *dai)
68 {
69 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
70
71 clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
72
73 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
74 }
75
lpass_cpu_daiops_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)76 static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
77 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
78 {
79 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
80 snd_pcm_format_t format = params_format(params);
81 unsigned int channels = params_channels(params);
82 unsigned int rate = params_rate(params);
83 unsigned int regval;
84 int bitwidth, ret;
85
86 bitwidth = snd_pcm_format_width(format);
87 if (bitwidth < 0) {
88 dev_err(dai->dev, "invalid bit width given: %d\n", bitwidth);
89 return bitwidth;
90 }
91
92 regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
93 LPAIF_I2SCTL_WSSRC_INTERNAL;
94
95 switch (bitwidth) {
96 case 16:
97 regval |= LPAIF_I2SCTL_BITWIDTH_16;
98 break;
99 case 24:
100 regval |= LPAIF_I2SCTL_BITWIDTH_24;
101 break;
102 case 32:
103 regval |= LPAIF_I2SCTL_BITWIDTH_32;
104 break;
105 default:
106 dev_err(dai->dev, "invalid bitwidth given: %d\n", bitwidth);
107 return -EINVAL;
108 }
109
110 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
111 switch (channels) {
112 case 1:
113 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
114 regval |= LPAIF_I2SCTL_SPKMONO_MONO;
115 break;
116 case 2:
117 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
118 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
119 break;
120 case 4:
121 regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
122 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
123 break;
124 case 6:
125 regval |= LPAIF_I2SCTL_SPKMODE_6CH;
126 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
127 break;
128 case 8:
129 regval |= LPAIF_I2SCTL_SPKMODE_8CH;
130 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
131 break;
132 default:
133 dev_err(dai->dev, "invalid channels given: %u\n",
134 channels);
135 return -EINVAL;
136 }
137 } else {
138 switch (channels) {
139 case 1:
140 regval |= LPAIF_I2SCTL_MICMODE_SD0;
141 regval |= LPAIF_I2SCTL_MICMONO_MONO;
142 break;
143 case 2:
144 regval |= LPAIF_I2SCTL_MICMODE_SD0;
145 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
146 break;
147 case 4:
148 regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
149 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
150 break;
151 case 6:
152 regval |= LPAIF_I2SCTL_MICMODE_6CH;
153 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
154 break;
155 case 8:
156 regval |= LPAIF_I2SCTL_MICMODE_8CH;
157 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
158 break;
159 default:
160 dev_err(dai->dev, "invalid channels given: %u\n",
161 channels);
162 return -EINVAL;
163 }
164 }
165
166 ret = regmap_write(drvdata->lpaif_map,
167 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
168 regval);
169 if (ret) {
170 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
171 return ret;
172 }
173
174 ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
175 rate * bitwidth * 2);
176 if (ret) {
177 dev_err(dai->dev, "error setting mi2s bitclk to %u: %d\n",
178 rate * bitwidth * 2, ret);
179 return ret;
180 }
181
182 return 0;
183 }
184
lpass_cpu_daiops_hw_free(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)185 static int lpass_cpu_daiops_hw_free(struct snd_pcm_substream *substream,
186 struct snd_soc_dai *dai)
187 {
188 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
189 int ret;
190
191 ret = regmap_write(drvdata->lpaif_map,
192 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
193 0);
194 if (ret)
195 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
196
197 return ret;
198 }
199
lpass_cpu_daiops_prepare(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)200 static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
201 struct snd_soc_dai *dai)
202 {
203 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
204 int ret;
205 unsigned int val, mask;
206
207 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
208 val = LPAIF_I2SCTL_SPKEN_ENABLE;
209 mask = LPAIF_I2SCTL_SPKEN_MASK;
210 } else {
211 val = LPAIF_I2SCTL_MICEN_ENABLE;
212 mask = LPAIF_I2SCTL_MICEN_MASK;
213 }
214
215 ret = regmap_update_bits(drvdata->lpaif_map,
216 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
217 mask, val);
218 if (ret)
219 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
220
221 return ret;
222 }
223
lpass_cpu_daiops_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)224 static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
225 int cmd, struct snd_soc_dai *dai)
226 {
227 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
228 int ret = -EINVAL;
229 unsigned int val, mask;
230
231 switch (cmd) {
232 case SNDRV_PCM_TRIGGER_START:
233 case SNDRV_PCM_TRIGGER_RESUME:
234 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
235 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
236 val = LPAIF_I2SCTL_SPKEN_ENABLE;
237 mask = LPAIF_I2SCTL_SPKEN_MASK;
238 } else {
239 val = LPAIF_I2SCTL_MICEN_ENABLE;
240 mask = LPAIF_I2SCTL_MICEN_MASK;
241 }
242
243 ret = regmap_update_bits(drvdata->lpaif_map,
244 LPAIF_I2SCTL_REG(drvdata->variant,
245 dai->driver->id),
246 mask, val);
247 if (ret)
248 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
249 ret);
250 break;
251 case SNDRV_PCM_TRIGGER_STOP:
252 case SNDRV_PCM_TRIGGER_SUSPEND:
253 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
254 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
255 val = LPAIF_I2SCTL_SPKEN_DISABLE;
256 mask = LPAIF_I2SCTL_SPKEN_MASK;
257 } else {
258 val = LPAIF_I2SCTL_MICEN_DISABLE;
259 mask = LPAIF_I2SCTL_MICEN_MASK;
260 }
261
262 ret = regmap_update_bits(drvdata->lpaif_map,
263 LPAIF_I2SCTL_REG(drvdata->variant,
264 dai->driver->id),
265 mask, val);
266 if (ret)
267 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
268 ret);
269 break;
270 }
271
272 return ret;
273 }
274
275 const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
276 .set_sysclk = lpass_cpu_daiops_set_sysclk,
277 .startup = lpass_cpu_daiops_startup,
278 .shutdown = lpass_cpu_daiops_shutdown,
279 .hw_params = lpass_cpu_daiops_hw_params,
280 .hw_free = lpass_cpu_daiops_hw_free,
281 .prepare = lpass_cpu_daiops_prepare,
282 .trigger = lpass_cpu_daiops_trigger,
283 };
284 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
285
asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai * dai)286 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
287 {
288 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
289 int ret;
290
291 /* ensure audio hardware is disabled */
292 ret = regmap_write(drvdata->lpaif_map,
293 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id), 0);
294 if (ret)
295 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
296
297 return ret;
298 }
299 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_probe);
300
301 static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
302 .name = "lpass-cpu",
303 };
304
lpass_cpu_regmap_writeable(struct device * dev,unsigned int reg)305 static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
306 {
307 struct lpass_data *drvdata = dev_get_drvdata(dev);
308 struct lpass_variant *v = drvdata->variant;
309 int i;
310
311 for (i = 0; i < v->i2s_ports; ++i)
312 if (reg == LPAIF_I2SCTL_REG(v, i))
313 return true;
314
315 for (i = 0; i < v->irq_ports; ++i) {
316 if (reg == LPAIF_IRQEN_REG(v, i))
317 return true;
318 if (reg == LPAIF_IRQCLEAR_REG(v, i))
319 return true;
320 }
321
322 for (i = 0; i < v->rdma_channels; ++i) {
323 if (reg == LPAIF_RDMACTL_REG(v, i))
324 return true;
325 if (reg == LPAIF_RDMABASE_REG(v, i))
326 return true;
327 if (reg == LPAIF_RDMABUFF_REG(v, i))
328 return true;
329 if (reg == LPAIF_RDMAPER_REG(v, i))
330 return true;
331 }
332
333 for (i = 0; i < v->wrdma_channels; ++i) {
334 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
335 return true;
336 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
337 return true;
338 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
339 return true;
340 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
341 return true;
342 }
343
344 return false;
345 }
346
lpass_cpu_regmap_readable(struct device * dev,unsigned int reg)347 static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
348 {
349 struct lpass_data *drvdata = dev_get_drvdata(dev);
350 struct lpass_variant *v = drvdata->variant;
351 int i;
352
353 for (i = 0; i < v->i2s_ports; ++i)
354 if (reg == LPAIF_I2SCTL_REG(v, i))
355 return true;
356
357 for (i = 0; i < v->irq_ports; ++i) {
358 if (reg == LPAIF_IRQEN_REG(v, i))
359 return true;
360 if (reg == LPAIF_IRQSTAT_REG(v, i))
361 return true;
362 }
363
364 for (i = 0; i < v->rdma_channels; ++i) {
365 if (reg == LPAIF_RDMACTL_REG(v, i))
366 return true;
367 if (reg == LPAIF_RDMABASE_REG(v, i))
368 return true;
369 if (reg == LPAIF_RDMABUFF_REG(v, i))
370 return true;
371 if (reg == LPAIF_RDMACURR_REG(v, i))
372 return true;
373 if (reg == LPAIF_RDMAPER_REG(v, i))
374 return true;
375 }
376
377 for (i = 0; i < v->wrdma_channels; ++i) {
378 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
379 return true;
380 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
381 return true;
382 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
383 return true;
384 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
385 return true;
386 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
387 return true;
388 }
389
390 return false;
391 }
392
lpass_cpu_regmap_volatile(struct device * dev,unsigned int reg)393 static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
394 {
395 struct lpass_data *drvdata = dev_get_drvdata(dev);
396 struct lpass_variant *v = drvdata->variant;
397 int i;
398
399 for (i = 0; i < v->irq_ports; ++i)
400 if (reg == LPAIF_IRQSTAT_REG(v, i))
401 return true;
402
403 for (i = 0; i < v->rdma_channels; ++i)
404 if (reg == LPAIF_RDMACURR_REG(v, i))
405 return true;
406
407 for (i = 0; i < v->wrdma_channels; ++i)
408 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
409 return true;
410
411 return false;
412 }
413
414 static struct regmap_config lpass_cpu_regmap_config = {
415 .reg_bits = 32,
416 .reg_stride = 4,
417 .val_bits = 32,
418 .writeable_reg = lpass_cpu_regmap_writeable,
419 .readable_reg = lpass_cpu_regmap_readable,
420 .volatile_reg = lpass_cpu_regmap_volatile,
421 .cache_type = REGCACHE_FLAT,
422 };
423
asoc_qcom_lpass_cpu_platform_probe(struct platform_device * pdev)424 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
425 {
426 struct lpass_data *drvdata;
427 struct device_node *dsp_of_node;
428 struct resource *res;
429 struct lpass_variant *variant;
430 struct device *dev = &pdev->dev;
431 const struct of_device_id *match;
432 int ret, i, dai_id;
433
434 dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
435 if (dsp_of_node) {
436 dev_err(&pdev->dev, "DSP exists and holds audio resources\n");
437 return -EBUSY;
438 }
439
440 drvdata = devm_kzalloc(&pdev->dev, sizeof(struct lpass_data),
441 GFP_KERNEL);
442 if (!drvdata)
443 return -ENOMEM;
444 platform_set_drvdata(pdev, drvdata);
445
446 match = of_match_device(dev->driver->of_match_table, dev);
447 if (!match || !match->data)
448 return -EINVAL;
449
450 drvdata->variant = (struct lpass_variant *)match->data;
451 variant = drvdata->variant;
452
453 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-lpaif");
454
455 drvdata->lpaif = devm_ioremap_resource(&pdev->dev, res);
456 if (IS_ERR((void const __force *)drvdata->lpaif)) {
457 dev_err(&pdev->dev, "error mapping reg resource: %ld\n",
458 PTR_ERR((void const __force *)drvdata->lpaif));
459 return PTR_ERR((void const __force *)drvdata->lpaif);
460 }
461
462 lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
463 variant->wrdma_channels +
464 variant->wrdma_channel_start);
465
466 drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
467 &lpass_cpu_regmap_config);
468 if (IS_ERR(drvdata->lpaif_map)) {
469 dev_err(&pdev->dev, "error initializing regmap: %ld\n",
470 PTR_ERR(drvdata->lpaif_map));
471 return PTR_ERR(drvdata->lpaif_map);
472 }
473
474 if (variant->init)
475 variant->init(pdev);
476
477 for (i = 0; i < variant->num_dai; i++) {
478 dai_id = variant->dai_driver[i].id;
479 drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
480 variant->dai_osr_clk_names[i]);
481 if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
482 dev_warn(&pdev->dev,
483 "%s() error getting optional %s: %ld\n",
484 __func__,
485 variant->dai_osr_clk_names[i],
486 PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
487
488 drvdata->mi2s_osr_clk[dai_id] = NULL;
489 }
490
491 drvdata->mi2s_bit_clk[dai_id] = devm_clk_get(&pdev->dev,
492 variant->dai_bit_clk_names[i]);
493 if (IS_ERR(drvdata->mi2s_bit_clk[dai_id])) {
494 dev_err(&pdev->dev,
495 "error getting %s: %ld\n",
496 variant->dai_bit_clk_names[i],
497 PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
498 return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
499 }
500 }
501
502 drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
503 if (IS_ERR(drvdata->ahbix_clk)) {
504 dev_err(&pdev->dev, "error getting ahbix-clk: %ld\n",
505 PTR_ERR(drvdata->ahbix_clk));
506 return PTR_ERR(drvdata->ahbix_clk);
507 }
508
509 ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
510 if (ret) {
511 dev_err(&pdev->dev, "error setting rate on ahbix_clk: %d\n",
512 ret);
513 return ret;
514 }
515 dev_dbg(&pdev->dev, "set ahbix_clk rate to %lu\n",
516 clk_get_rate(drvdata->ahbix_clk));
517
518 ret = clk_prepare_enable(drvdata->ahbix_clk);
519 if (ret) {
520 dev_err(&pdev->dev, "error enabling ahbix_clk: %d\n", ret);
521 return ret;
522 }
523
524 ret = devm_snd_soc_register_component(&pdev->dev,
525 &lpass_cpu_comp_driver,
526 variant->dai_driver,
527 variant->num_dai);
528 if (ret) {
529 dev_err(&pdev->dev, "error registering cpu driver: %d\n", ret);
530 goto err_clk;
531 }
532
533 ret = asoc_qcom_lpass_platform_register(pdev);
534 if (ret) {
535 dev_err(&pdev->dev, "error registering platform driver: %d\n",
536 ret);
537 goto err_clk;
538 }
539
540 return 0;
541
542 err_clk:
543 clk_disable_unprepare(drvdata->ahbix_clk);
544 return ret;
545 }
546 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_probe);
547
asoc_qcom_lpass_cpu_platform_remove(struct platform_device * pdev)548 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev)
549 {
550 struct lpass_data *drvdata = platform_get_drvdata(pdev);
551
552 if (drvdata->variant->exit)
553 drvdata->variant->exit(pdev);
554
555 clk_disable_unprepare(drvdata->ahbix_clk);
556
557 return 0;
558 }
559 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_remove);
560
561 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
562 MODULE_LICENSE("GPL v2");
563
