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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / sound / soc / qcom / lpass-cpu.c
blobdbce7e92baf3c0746fc70fe13f782e33edc7e5d8
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
4 *
5 * lpass-cpu.c -- ALSA SoC CPU DAI driver for QTi LPASS
6 */
7
8 #include <linux/clk.h>
9 #include <linux/kernel.h>
10 #include <linux/module.h>
11 #include <linux/of.h>
12 #include <linux/of_device.h>
13 #include <linux/platform_device.h>
14 #include <sound/pcm.h>
15 #include <sound/pcm_params.h>
16 #include <linux/regmap.h>
17 #include <sound/soc.h>
18 #include <sound/soc-dai.h>
19 #include "lpass-lpaif-reg.h"
20 #include "lpass.h"
21
22 static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
23 unsigned int freq, int dir)
24 {
25 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
26 int ret;
27
28 ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
29 if (ret)
30 dev_err(dai->dev, "error setting mi2s osrclk to %u: %d\n",
31 freq, ret);
32
33 return ret;
34 }
35
36 static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
37 struct snd_soc_dai *dai)
38 {
39 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
40 int ret;
41
42 ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->driver->id]);
43 if (ret) {
44 dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
45 return ret;
46 }
47
48 ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
49 if (ret) {
50 dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
51 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
52 return ret;
53 }
54
55 return 0;
56 }
57
58 static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
59 struct snd_soc_dai *dai)
60 {
61 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
62
63 clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
64
65 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
66 }
67
68 static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
69 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
70 {
71 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
72 snd_pcm_format_t format = params_format(params);
73 unsigned int channels = params_channels(params);
74 unsigned int rate = params_rate(params);
75 unsigned int regval;
76 int bitwidth, ret;
77
78 bitwidth = snd_pcm_format_width(format);
79 if (bitwidth < 0) {
80 dev_err(dai->dev, "invalid bit width given: %d\n", bitwidth);
81 return bitwidth;
82 }
83
84 regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
85 LPAIF_I2SCTL_WSSRC_INTERNAL;
86
87 switch (bitwidth) {
88 case 16:
89 regval |= LPAIF_I2SCTL_BITWIDTH_16;
90 break;
91 case 24:
92 regval |= LPAIF_I2SCTL_BITWIDTH_24;
93 break;
94 case 32:
95 regval |= LPAIF_I2SCTL_BITWIDTH_32;
96 break;
97 default:
98 dev_err(dai->dev, "invalid bitwidth given: %d\n", bitwidth);
99 return -EINVAL;
100 }
101
102 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
103 switch (channels) {
104 case 1:
105 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
106 regval |= LPAIF_I2SCTL_SPKMONO_MONO;
107 break;
108 case 2:
109 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
110 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
111 break;
112 case 4:
113 regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
114 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
115 break;
116 case 6:
117 regval |= LPAIF_I2SCTL_SPKMODE_6CH;
118 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
119 break;
120 case 8:
121 regval |= LPAIF_I2SCTL_SPKMODE_8CH;
122 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
123 break;
124 default:
125 dev_err(dai->dev, "invalid channels given: %u\n",
126 channels);
127 return -EINVAL;
128 }
129 } else {
130 switch (channels) {
131 case 1:
132 regval |= LPAIF_I2SCTL_MICMODE_SD0;
133 regval |= LPAIF_I2SCTL_MICMONO_MONO;
134 break;
135 case 2:
136 regval |= LPAIF_I2SCTL_MICMODE_SD0;
137 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
138 break;
139 case 4:
140 regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
141 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
142 break;
143 case 6:
144 regval |= LPAIF_I2SCTL_MICMODE_6CH;
145 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
146 break;
147 case 8:
148 regval |= LPAIF_I2SCTL_MICMODE_8CH;
149 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
150 break;
151 default:
152 dev_err(dai->dev, "invalid channels given: %u\n",
153 channels);
154 return -EINVAL;
155 }
156 }
157
158 ret = regmap_write(drvdata->lpaif_map,
159 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
160 regval);
161 if (ret) {
162 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
163 return ret;
164 }
165
166 ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
167 rate * bitwidth * 2);
168 if (ret) {
169 dev_err(dai->dev, "error setting mi2s bitclk to %u: %d\n",
170 rate * bitwidth * 2, ret);
171 return ret;
172 }
173
174 return 0;
175 }
176
177 static int lpass_cpu_daiops_hw_free(struct snd_pcm_substream *substream,
178 struct snd_soc_dai *dai)
179 {
180 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
181 int ret;
182
183 ret = regmap_write(drvdata->lpaif_map,
184 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
185 0);
186 if (ret)
187 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
188
189 return ret;
190 }
191
192 static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
193 struct snd_soc_dai *dai)
194 {
195 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
196 int ret;
197 unsigned int val, mask;
198
199 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
200 val = LPAIF_I2SCTL_SPKEN_ENABLE;
201 mask = LPAIF_I2SCTL_SPKEN_MASK;
202 } else {
203 val = LPAIF_I2SCTL_MICEN_ENABLE;
204 mask = LPAIF_I2SCTL_MICEN_MASK;
205 }
206
207 ret = regmap_update_bits(drvdata->lpaif_map,
208 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
209 mask, val);
210 if (ret)
211 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
212
213 return ret;
214 }
215
216 static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
217 int cmd, struct snd_soc_dai *dai)
218 {
219 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
220 int ret = -EINVAL;
221 unsigned int val, mask;
222
223 switch (cmd) {
224 case SNDRV_PCM_TRIGGER_START:
225 case SNDRV_PCM_TRIGGER_RESUME:
226 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
227 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
228 val = LPAIF_I2SCTL_SPKEN_ENABLE;
229 mask = LPAIF_I2SCTL_SPKEN_MASK;
230 } else {
231 val = LPAIF_I2SCTL_MICEN_ENABLE;
232 mask = LPAIF_I2SCTL_MICEN_MASK;
233 }
234
235 ret = regmap_update_bits(drvdata->lpaif_map,
236 LPAIF_I2SCTL_REG(drvdata->variant,
237 dai->driver->id),
238 mask, val);
239 if (ret)
240 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
241 ret);
242 break;
243 case SNDRV_PCM_TRIGGER_STOP:
244 case SNDRV_PCM_TRIGGER_SUSPEND:
245 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
246 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
247 val = LPAIF_I2SCTL_SPKEN_DISABLE;
248 mask = LPAIF_I2SCTL_SPKEN_MASK;
249 } else {
250 val = LPAIF_I2SCTL_MICEN_DISABLE;
251 mask = LPAIF_I2SCTL_MICEN_MASK;
252 }
253
254 ret = regmap_update_bits(drvdata->lpaif_map,
255 LPAIF_I2SCTL_REG(drvdata->variant,
256 dai->driver->id),
257 mask, val);
258 if (ret)
259 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
260 ret);
261 break;
262 }
263
264 return ret;
265 }
266
267 const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
268 .set_sysclk = lpass_cpu_daiops_set_sysclk,
269 .startup = lpass_cpu_daiops_startup,
270 .shutdown = lpass_cpu_daiops_shutdown,
271 .hw_params = lpass_cpu_daiops_hw_params,
272 .hw_free = lpass_cpu_daiops_hw_free,
273 .prepare = lpass_cpu_daiops_prepare,
274 .trigger = lpass_cpu_daiops_trigger,
275 };
276 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
277
278 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
279 {
280 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
281 int ret;
282
283 /* ensure audio hardware is disabled */
284 ret = regmap_write(drvdata->lpaif_map,
285 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id), 0);
286 if (ret)
287 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
288
289 return ret;
290 }
291 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_probe);
292
293 static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
294 .name = "lpass-cpu",
295 };
296
297 static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
298 {
299 struct lpass_data *drvdata = dev_get_drvdata(dev);
300 struct lpass_variant *v = drvdata->variant;
301 int i;
302
303 for (i = 0; i < v->i2s_ports; ++i)
304 if (reg == LPAIF_I2SCTL_REG(v, i))
305 return true;
306
307 for (i = 0; i < v->irq_ports; ++i) {
308 if (reg == LPAIF_IRQEN_REG(v, i))
309 return true;
310 if (reg == LPAIF_IRQCLEAR_REG(v, i))
311 return true;
312 }
313
314 for (i = 0; i < v->rdma_channels; ++i) {
315 if (reg == LPAIF_RDMACTL_REG(v, i))
316 return true;
317 if (reg == LPAIF_RDMABASE_REG(v, i))
318 return true;
319 if (reg == LPAIF_RDMABUFF_REG(v, i))
320 return true;
321 if (reg == LPAIF_RDMAPER_REG(v, i))
322 return true;
323 }
324
325 for (i = 0; i < v->wrdma_channels; ++i) {
326 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
327 return true;
328 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
329 return true;
330 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
331 return true;
332 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
333 return true;
334 }
335
336 return false;
337 }
338
339 static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
340 {
341 struct lpass_data *drvdata = dev_get_drvdata(dev);
342 struct lpass_variant *v = drvdata->variant;
343 int i;
344
345 for (i = 0; i < v->i2s_ports; ++i)
346 if (reg == LPAIF_I2SCTL_REG(v, i))
347 return true;
348
349 for (i = 0; i < v->irq_ports; ++i) {
350 if (reg == LPAIF_IRQEN_REG(v, i))
351 return true;
352 if (reg == LPAIF_IRQSTAT_REG(v, i))
353 return true;
354 }
355
356 for (i = 0; i < v->rdma_channels; ++i) {
357 if (reg == LPAIF_RDMACTL_REG(v, i))
358 return true;
359 if (reg == LPAIF_RDMABASE_REG(v, i))
360 return true;
361 if (reg == LPAIF_RDMABUFF_REG(v, i))
362 return true;
363 if (reg == LPAIF_RDMACURR_REG(v, i))
364 return true;
365 if (reg == LPAIF_RDMAPER_REG(v, i))
366 return true;
367 }
368
369 for (i = 0; i < v->wrdma_channels; ++i) {
370 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
371 return true;
372 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
373 return true;
374 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
375 return true;
376 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
377 return true;
378 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
379 return true;
380 }
381
382 return false;
383 }
384
385 static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
386 {
387 struct lpass_data *drvdata = dev_get_drvdata(dev);
388 struct lpass_variant *v = drvdata->variant;
389 int i;
390
391 for (i = 0; i < v->irq_ports; ++i)
392 if (reg == LPAIF_IRQSTAT_REG(v, i))
393 return true;
394
395 for (i = 0; i < v->rdma_channels; ++i)
396 if (reg == LPAIF_RDMACURR_REG(v, i))
397 return true;
398
399 for (i = 0; i < v->wrdma_channels; ++i)
400 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
401 return true;
402
403 return false;
404 }
405
406 static struct regmap_config lpass_cpu_regmap_config = {
407 .reg_bits = 32,
408 .reg_stride = 4,
409 .val_bits = 32,
410 .writeable_reg = lpass_cpu_regmap_writeable,
411 .readable_reg = lpass_cpu_regmap_readable,
412 .volatile_reg = lpass_cpu_regmap_volatile,
413 .cache_type = REGCACHE_FLAT,
414 };
415
416 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
417 {
418 struct lpass_data *drvdata;
419 struct device_node *dsp_of_node;
420 struct resource *res;
421 struct lpass_variant *variant;
422 struct device *dev = &pdev->dev;
423 const struct of_device_id *match;
424 int ret, i, dai_id;
425
426 dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
427 if (dsp_of_node) {
428 dev_err(&pdev->dev, "DSP exists and holds audio resources\n");
429 return -EBUSY;
430 }
431
432 drvdata = devm_kzalloc(&pdev->dev, sizeof(struct lpass_data),
433 GFP_KERNEL);
434 if (!drvdata)
435 return -ENOMEM;
436 platform_set_drvdata(pdev, drvdata);
437
438 match = of_match_device(dev->driver->of_match_table, dev);
439 if (!match || !match->data)
440 return -EINVAL;
441
442 drvdata->variant = (struct lpass_variant *)match->data;
443 variant = drvdata->variant;
444
445 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-lpaif");
446
447 drvdata->lpaif = devm_ioremap_resource(&pdev->dev, res);
448 if (IS_ERR((void const __force *)drvdata->lpaif)) {
449 dev_err(&pdev->dev, "error mapping reg resource: %ld\n",
450 PTR_ERR((void const __force *)drvdata->lpaif));
451 return PTR_ERR((void const __force *)drvdata->lpaif);
452 }
453
454 lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
455 variant->wrdma_channels +
456 variant->wrdma_channel_start);
457
458 drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
459 &lpass_cpu_regmap_config);
460 if (IS_ERR(drvdata->lpaif_map)) {
461 dev_err(&pdev->dev, "error initializing regmap: %ld\n",
462 PTR_ERR(drvdata->lpaif_map));
463 return PTR_ERR(drvdata->lpaif_map);
464 }
465
466 if (variant->init)
467 variant->init(pdev);
468
469 for (i = 0; i < variant->num_dai; i++) {
470 dai_id = variant->dai_driver[i].id;
471 drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
472 variant->dai_osr_clk_names[i]);
473 if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
474 dev_warn(&pdev->dev,
475 "%s() error getting optional %s: %ld\n",
476 __func__,
477 variant->dai_osr_clk_names[i],
478 PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
479
480 drvdata->mi2s_osr_clk[dai_id] = NULL;
481 }
482
483 drvdata->mi2s_bit_clk[dai_id] = devm_clk_get(&pdev->dev,
484 variant->dai_bit_clk_names[i]);
485 if (IS_ERR(drvdata->mi2s_bit_clk[dai_id])) {
486 dev_err(&pdev->dev,
487 "error getting %s: %ld\n",
488 variant->dai_bit_clk_names[i],
489 PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
490 return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
491 }
492 }
493
494 drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
495 if (IS_ERR(drvdata->ahbix_clk)) {
496 dev_err(&pdev->dev, "error getting ahbix-clk: %ld\n",
497 PTR_ERR(drvdata->ahbix_clk));
498 return PTR_ERR(drvdata->ahbix_clk);
499 }
500
501 ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
502 if (ret) {
503 dev_err(&pdev->dev, "error setting rate on ahbix_clk: %d\n",
504 ret);
505 return ret;
506 }
507 dev_dbg(&pdev->dev, "set ahbix_clk rate to %lu\n",
508 clk_get_rate(drvdata->ahbix_clk));
509
510 ret = clk_prepare_enable(drvdata->ahbix_clk);
511 if (ret) {
512 dev_err(&pdev->dev, "error enabling ahbix_clk: %d\n", ret);
513 return ret;
514 }
515
516 ret = devm_snd_soc_register_component(&pdev->dev,
517 &lpass_cpu_comp_driver,
518 variant->dai_driver,
519 variant->num_dai);
520 if (ret) {
521 dev_err(&pdev->dev, "error registering cpu driver: %d\n", ret);
522 goto err_clk;
523 }
524
525 ret = asoc_qcom_lpass_platform_register(pdev);
526 if (ret) {
527 dev_err(&pdev->dev, "error registering platform driver: %d\n",
528 ret);
529 goto err_clk;
530 }
531
532 return 0;
533
534 err_clk:
535 clk_disable_unprepare(drvdata->ahbix_clk);
536 return ret;
537 }
538 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_probe);
539
540 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev)
541 {
542 struct lpass_data *drvdata = platform_get_drvdata(pdev);
543
544 if (drvdata->variant->exit)
545 drvdata->variant->exit(pdev);
546
547 clk_disable_unprepare(drvdata->ahbix_clk);
548
549 return 0;
550 }
551 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_remove);
552
553 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
554 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support