2 * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
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.
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.
13 * lpass-cpu.c -- ALSA SoC CPU DAI driver for QTi LPASS
16 #include <linux/clk.h>
17 #include <linux/kernel.h>
18 #include <linux/module.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"
30 static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
31 unsigned int freq, int dir)
33 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
36 ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
38 dev_err(dai->dev, "error setting mi2s osrclk to %u: %d\n",
44 static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
45 struct snd_soc_dai *dai)
47 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
50 ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->driver->id]);
52 dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
56 ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
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]);
66 static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
67 struct snd_soc_dai *dai)
69 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
71 clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
73 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
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)
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);
86 bitwidth = snd_pcm_format_width(format);
88 dev_err(dai->dev, "invalid bit width given: %d\n", bitwidth);
92 regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
93 LPAIF_I2SCTL_WSSRC_INTERNAL;
97 regval |= LPAIF_I2SCTL_BITWIDTH_16;
100 regval |= LPAIF_I2SCTL_BITWIDTH_24;
103 regval |= LPAIF_I2SCTL_BITWIDTH_32;
106 dev_err(dai->dev, "invalid bitwidth given: %d\n", bitwidth);
110 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
113 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
114 regval |= LPAIF_I2SCTL_SPKMONO_MONO;
117 regval |= LPAIF_I2SCTL_SPKMODE_SD0;
118 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
121 regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
122 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
125 regval |= LPAIF_I2SCTL_SPKMODE_6CH;
126 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
129 regval |= LPAIF_I2SCTL_SPKMODE_8CH;
130 regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
133 dev_err(dai->dev, "invalid channels given: %u\n",
140 regval |= LPAIF_I2SCTL_MICMODE_SD0;
141 regval |= LPAIF_I2SCTL_MICMONO_MONO;
144 regval |= LPAIF_I2SCTL_MICMODE_SD0;
145 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
148 regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
149 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
152 regval |= LPAIF_I2SCTL_MICMODE_6CH;
153 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
156 regval |= LPAIF_I2SCTL_MICMODE_8CH;
157 regval |= LPAIF_I2SCTL_MICMONO_STEREO;
160 dev_err(dai->dev, "invalid channels given: %u\n",
166 ret = regmap_write(drvdata->lpaif_map,
167 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
170 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
174 ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
175 rate * bitwidth * 2);
177 dev_err(dai->dev, "error setting mi2s bitclk to %u: %d\n",
178 rate * bitwidth * 2, ret);
185 static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
186 struct snd_soc_dai *dai)
188 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
190 unsigned int val, mask;
192 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
193 val = LPAIF_I2SCTL_SPKEN_ENABLE;
194 mask = LPAIF_I2SCTL_SPKEN_MASK;
196 val = LPAIF_I2SCTL_MICEN_ENABLE;
197 mask = LPAIF_I2SCTL_MICEN_MASK;
200 ret = regmap_update_bits(drvdata->lpaif_map,
201 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
204 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
209 static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
210 int cmd, struct snd_soc_dai *dai)
212 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
214 unsigned int val, mask;
217 case SNDRV_PCM_TRIGGER_START:
218 case SNDRV_PCM_TRIGGER_RESUME:
219 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
220 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
221 val = LPAIF_I2SCTL_SPKEN_ENABLE;
222 mask = LPAIF_I2SCTL_SPKEN_MASK;
224 val = LPAIF_I2SCTL_MICEN_ENABLE;
225 mask = LPAIF_I2SCTL_MICEN_MASK;
228 ret = regmap_update_bits(drvdata->lpaif_map,
229 LPAIF_I2SCTL_REG(drvdata->variant,
233 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
236 case SNDRV_PCM_TRIGGER_STOP:
237 case SNDRV_PCM_TRIGGER_SUSPEND:
238 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
239 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
240 val = LPAIF_I2SCTL_SPKEN_DISABLE;
241 mask = LPAIF_I2SCTL_SPKEN_MASK;
243 val = LPAIF_I2SCTL_MICEN_DISABLE;
244 mask = LPAIF_I2SCTL_MICEN_MASK;
247 ret = regmap_update_bits(drvdata->lpaif_map,
248 LPAIF_I2SCTL_REG(drvdata->variant,
252 dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
260 const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
261 .set_sysclk = lpass_cpu_daiops_set_sysclk,
262 .startup = lpass_cpu_daiops_startup,
263 .shutdown = lpass_cpu_daiops_shutdown,
264 .hw_params = lpass_cpu_daiops_hw_params,
265 .prepare = lpass_cpu_daiops_prepare,
266 .trigger = lpass_cpu_daiops_trigger,
268 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
270 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
272 struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
275 /* ensure audio hardware is disabled */
276 ret = regmap_write(drvdata->lpaif_map,
277 LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id), 0);
279 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
283 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_probe);
285 static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
289 static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
291 struct lpass_data *drvdata = dev_get_drvdata(dev);
292 struct lpass_variant *v = drvdata->variant;
295 for (i = 0; i < v->i2s_ports; ++i)
296 if (reg == LPAIF_I2SCTL_REG(v, i))
299 for (i = 0; i < v->irq_ports; ++i) {
300 if (reg == LPAIF_IRQEN_REG(v, i))
302 if (reg == LPAIF_IRQCLEAR_REG(v, i))
306 for (i = 0; i < v->rdma_channels; ++i) {
307 if (reg == LPAIF_RDMACTL_REG(v, i))
309 if (reg == LPAIF_RDMABASE_REG(v, i))
311 if (reg == LPAIF_RDMABUFF_REG(v, i))
313 if (reg == LPAIF_RDMAPER_REG(v, i))
317 for (i = 0; i < v->wrdma_channels; ++i) {
318 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
320 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
322 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
324 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
331 static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
333 struct lpass_data *drvdata = dev_get_drvdata(dev);
334 struct lpass_variant *v = drvdata->variant;
337 for (i = 0; i < v->i2s_ports; ++i)
338 if (reg == LPAIF_I2SCTL_REG(v, i))
341 for (i = 0; i < v->irq_ports; ++i) {
342 if (reg == LPAIF_IRQEN_REG(v, i))
344 if (reg == LPAIF_IRQSTAT_REG(v, i))
348 for (i = 0; i < v->rdma_channels; ++i) {
349 if (reg == LPAIF_RDMACTL_REG(v, i))
351 if (reg == LPAIF_RDMABASE_REG(v, i))
353 if (reg == LPAIF_RDMABUFF_REG(v, i))
355 if (reg == LPAIF_RDMACURR_REG(v, i))
357 if (reg == LPAIF_RDMAPER_REG(v, i))
361 for (i = 0; i < v->wrdma_channels; ++i) {
362 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
364 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
366 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
368 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
370 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
377 static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
379 struct lpass_data *drvdata = dev_get_drvdata(dev);
380 struct lpass_variant *v = drvdata->variant;
383 for (i = 0; i < v->irq_ports; ++i)
384 if (reg == LPAIF_IRQSTAT_REG(v, i))
387 for (i = 0; i < v->rdma_channels; ++i)
388 if (reg == LPAIF_RDMACURR_REG(v, i))
391 for (i = 0; i < v->wrdma_channels; ++i)
392 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
398 static struct regmap_config lpass_cpu_regmap_config = {
402 .writeable_reg = lpass_cpu_regmap_writeable,
403 .readable_reg = lpass_cpu_regmap_readable,
404 .volatile_reg = lpass_cpu_regmap_volatile,
405 .cache_type = REGCACHE_FLAT,
408 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
410 struct lpass_data *drvdata;
411 struct device_node *dsp_of_node;
412 struct resource *res;
413 struct lpass_variant *variant;
414 struct device *dev = &pdev->dev;
415 const struct of_device_id *match;
418 dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
420 dev_err(&pdev->dev, "DSP exists and holds audio resources\n");
424 drvdata = devm_kzalloc(&pdev->dev, sizeof(struct lpass_data),
428 platform_set_drvdata(pdev, drvdata);
430 match = of_match_device(dev->driver->of_match_table, dev);
431 if (!match || !match->data)
434 drvdata->variant = (struct lpass_variant *)match->data;
435 variant = drvdata->variant;
437 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-lpaif");
439 drvdata->lpaif = devm_ioremap_resource(&pdev->dev, res);
440 if (IS_ERR((void const __force *)drvdata->lpaif)) {
441 dev_err(&pdev->dev, "error mapping reg resource: %ld\n",
442 PTR_ERR((void const __force *)drvdata->lpaif));
443 return PTR_ERR((void const __force *)drvdata->lpaif);
446 lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
447 variant->wrdma_channels +
448 variant->wrdma_channel_start);
450 drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
451 &lpass_cpu_regmap_config);
452 if (IS_ERR(drvdata->lpaif_map)) {
453 dev_err(&pdev->dev, "error initializing regmap: %ld\n",
454 PTR_ERR(drvdata->lpaif_map));
455 return PTR_ERR(drvdata->lpaif_map);
461 for (i = 0; i < variant->num_dai; i++) {
462 dai_id = variant->dai_driver[i].id;
463 drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
464 variant->dai_osr_clk_names[i]);
465 if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
467 "%s() error getting optional %s: %ld\n",
469 variant->dai_osr_clk_names[i],
470 PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
472 drvdata->mi2s_osr_clk[dai_id] = NULL;
475 drvdata->mi2s_bit_clk[dai_id] = devm_clk_get(&pdev->dev,
476 variant->dai_bit_clk_names[i]);
477 if (IS_ERR(drvdata->mi2s_bit_clk[dai_id])) {
479 "error getting %s: %ld\n",
480 variant->dai_bit_clk_names[i],
481 PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
482 return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
486 drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
487 if (IS_ERR(drvdata->ahbix_clk)) {
488 dev_err(&pdev->dev, "error getting ahbix-clk: %ld\n",
489 PTR_ERR(drvdata->ahbix_clk));
490 return PTR_ERR(drvdata->ahbix_clk);
493 ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
495 dev_err(&pdev->dev, "error setting rate on ahbix_clk: %d\n",
499 dev_dbg(&pdev->dev, "set ahbix_clk rate to %lu\n",
500 clk_get_rate(drvdata->ahbix_clk));
502 ret = clk_prepare_enable(drvdata->ahbix_clk);
504 dev_err(&pdev->dev, "error enabling ahbix_clk: %d\n", ret);
508 ret = devm_snd_soc_register_component(&pdev->dev,
509 &lpass_cpu_comp_driver,
513 dev_err(&pdev->dev, "error registering cpu driver: %d\n", ret);
517 ret = asoc_qcom_lpass_platform_register(pdev);
519 dev_err(&pdev->dev, "error registering platform driver: %d\n",
527 clk_disable_unprepare(drvdata->ahbix_clk);
530 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_probe);
532 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev)
534 struct lpass_data *drvdata = platform_get_drvdata(pdev);
536 if (drvdata->variant->exit)
537 drvdata->variant->exit(pdev);
539 clk_disable_unprepare(drvdata->ahbix_clk);
543 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_remove);
545 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
546 MODULE_LICENSE("GPL v2");