1 // SPDX-License-Identifier: GPL-2.0
3 * mtk-afe-fe-dais.c -- Mediatek afe fe dai operator
5 * Copyright (c) 2016 MediaTek Inc.
6 * Author: Garlic Tseng <garlic.tseng@mediatek.com>
9 #include <linux/module.h>
10 #include <linux/pm_runtime.h>
11 #include <linux/regmap.h>
12 #include <sound/soc.h>
13 #include "mtk-afe-platform-driver.h"
14 #include "mtk-afe-fe-dai.h"
15 #include "mtk-base-afe.h"
17 #define AFE_BASE_END_OFFSET 8
19 static int mtk_regmap_update_bits(struct regmap *map, int reg,
25 return regmap_update_bits(map, reg, mask, val);
28 static int mtk_regmap_write(struct regmap *map, int reg, unsigned int val)
32 return regmap_write(map, reg, val);
35 int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
36 struct snd_soc_dai *dai)
38 struct snd_soc_pcm_runtime *rtd = substream->private_data;
39 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
40 struct snd_pcm_runtime *runtime = substream->runtime;
41 int memif_num = rtd->cpu_dai->id;
42 struct mtk_base_afe_memif *memif = &afe->memif[memif_num];
43 const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware;
46 memif->substream = substream;
48 snd_pcm_hw_constraint_step(substream->runtime, 0,
49 SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
51 mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
52 1 << memif->data->agent_disable_shift,
53 0 << memif->data->agent_disable_shift);
55 snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware);
58 * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
59 * smaller than period_size due to AFE's internal buffer.
60 * This easily leads to overrun when avail_min is period_size.
61 * One more period can hold the possible unread buffer.
63 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
64 int periods_max = mtk_afe_hardware->periods_max;
66 ret = snd_pcm_hw_constraint_minmax(runtime,
67 SNDRV_PCM_HW_PARAM_PERIODS,
70 dev_err(afe->dev, "hw_constraint_minmax failed\n");
75 ret = snd_pcm_hw_constraint_integer(runtime,
76 SNDRV_PCM_HW_PARAM_PERIODS);
78 dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");
80 /* dynamic allocate irq to memif */
81 if (memif->irq_usage < 0) {
82 int irq_id = mtk_dynamic_irq_acquire(afe);
84 if (irq_id != afe->irqs_size) {
86 memif->irq_usage = irq_id;
88 dev_err(afe->dev, "%s() error: no more asys irq\n",
95 EXPORT_SYMBOL_GPL(mtk_afe_fe_startup);
97 void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
98 struct snd_soc_dai *dai)
100 struct snd_soc_pcm_runtime *rtd = substream->private_data;
101 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
102 struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
105 irq_id = memif->irq_usage;
107 mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
108 1 << memif->data->agent_disable_shift,
109 1 << memif->data->agent_disable_shift);
111 if (!memif->const_irq) {
112 mtk_dynamic_irq_release(afe, irq_id);
113 memif->irq_usage = -1;
114 memif->substream = NULL;
117 EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown);
119 int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
120 struct snd_pcm_hw_params *params,
121 struct snd_soc_dai *dai)
123 struct snd_soc_pcm_runtime *rtd = substream->private_data;
124 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
125 struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
126 int msb_at_bit33 = 0;
129 ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
133 msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
134 memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
135 memif->buffer_size = substream->runtime->dma_bytes;
138 mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
139 memif->phys_buf_addr);
141 mtk_regmap_write(afe->regmap,
142 memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
143 memif->phys_buf_addr + memif->buffer_size - 1);
145 /* set MSB to 33-bit */
146 mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
147 1 << memif->data->msb_shift,
148 msb_at_bit33 << memif->data->msb_shift);
151 if (memif->data->mono_shift >= 0) {
152 unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
154 mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
155 1 << memif->data->mono_shift,
156 mono << memif->data->mono_shift);
160 if (memif->data->fs_shift < 0)
163 fs = afe->memif_fs(substream, params_rate(params));
168 mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
169 memif->data->fs_maskbit << memif->data->fs_shift,
170 fs << memif->data->fs_shift);
174 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params);
176 int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
177 struct snd_soc_dai *dai)
179 return snd_pcm_lib_free_pages(substream);
181 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);
183 int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
184 struct snd_soc_dai *dai)
186 struct snd_soc_pcm_runtime *rtd = substream->private_data;
187 struct snd_pcm_runtime * const runtime = substream->runtime;
188 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
189 struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
190 struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage];
191 const struct mtk_base_irq_data *irq_data = irqs->irq_data;
192 unsigned int counter = runtime->period_size;
195 dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);
198 case SNDRV_PCM_TRIGGER_START:
199 case SNDRV_PCM_TRIGGER_RESUME:
200 mtk_regmap_update_bits(afe->regmap,
201 memif->data->enable_reg,
202 1 << memif->data->enable_shift,
203 1 << memif->data->enable_shift);
205 /* set irq counter */
206 mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
207 irq_data->irq_cnt_maskbit
208 << irq_data->irq_cnt_shift,
209 counter << irq_data->irq_cnt_shift);
212 fs = afe->irq_fs(substream, runtime->rate);
217 mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg,
218 irq_data->irq_fs_maskbit
219 << irq_data->irq_fs_shift,
220 fs << irq_data->irq_fs_shift);
222 /* enable interrupt */
223 mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
224 1 << irq_data->irq_en_shift,
225 1 << irq_data->irq_en_shift);
228 case SNDRV_PCM_TRIGGER_STOP:
229 case SNDRV_PCM_TRIGGER_SUSPEND:
230 mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
231 1 << memif->data->enable_shift, 0);
232 /* disable interrupt */
233 mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
234 1 << irq_data->irq_en_shift,
235 0 << irq_data->irq_en_shift);
236 /* and clear pending IRQ */
237 mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg,
238 1 << irq_data->irq_clr_shift);
244 EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger);
246 int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
247 struct snd_soc_dai *dai)
249 struct snd_soc_pcm_runtime *rtd = substream->private_data;
250 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
251 struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
255 switch (substream->runtime->format) {
256 case SNDRV_PCM_FORMAT_S16_LE:
259 case SNDRV_PCM_FORMAT_S32_LE:
262 case SNDRV_PCM_FORMAT_S24_LE:
266 dev_err(afe->dev, "%s() error: unsupported format %d\n",
267 __func__, substream->runtime->format);
271 mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
272 1 << memif->data->hd_shift,
273 hd_audio << memif->data->hd_shift);
277 EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare);
279 const struct snd_soc_dai_ops mtk_afe_fe_ops = {
280 .startup = mtk_afe_fe_startup,
281 .shutdown = mtk_afe_fe_shutdown,
282 .hw_params = mtk_afe_fe_hw_params,
283 .hw_free = mtk_afe_fe_hw_free,
284 .prepare = mtk_afe_fe_prepare,
285 .trigger = mtk_afe_fe_trigger,
287 EXPORT_SYMBOL_GPL(mtk_afe_fe_ops);
289 static DEFINE_MUTEX(irqs_lock);
290 int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe)
294 mutex_lock(&afe->irq_alloc_lock);
295 for (i = 0; i < afe->irqs_size; ++i) {
296 if (afe->irqs[i].irq_occupyed == 0) {
297 afe->irqs[i].irq_occupyed = 1;
298 mutex_unlock(&afe->irq_alloc_lock);
302 mutex_unlock(&afe->irq_alloc_lock);
303 return afe->irqs_size;
305 EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire);
307 int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id)
309 mutex_lock(&afe->irq_alloc_lock);
310 if (irq_id >= 0 && irq_id < afe->irqs_size) {
311 afe->irqs[irq_id].irq_occupyed = 0;
312 mutex_unlock(&afe->irq_alloc_lock);
315 mutex_unlock(&afe->irq_alloc_lock);
318 EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release);
320 int mtk_afe_dai_suspend(struct snd_soc_dai *dai)
322 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
323 struct device *dev = afe->dev;
324 struct regmap *regmap = afe->regmap;
327 if (pm_runtime_status_suspended(dev) || afe->suspended)
330 if (!afe->reg_back_up)
332 devm_kcalloc(dev, afe->reg_back_up_list_num,
333 sizeof(unsigned int), GFP_KERNEL);
335 for (i = 0; i < afe->reg_back_up_list_num; i++)
336 regmap_read(regmap, afe->reg_back_up_list[i],
337 &afe->reg_back_up[i]);
339 afe->suspended = true;
340 afe->runtime_suspend(dev);
343 EXPORT_SYMBOL_GPL(mtk_afe_dai_suspend);
345 int mtk_afe_dai_resume(struct snd_soc_dai *dai)
347 struct mtk_base_afe *afe = snd_soc_dai_get_drvdata(dai);
348 struct device *dev = afe->dev;
349 struct regmap *regmap = afe->regmap;
352 if (pm_runtime_status_suspended(dev) || !afe->suspended)
355 afe->runtime_resume(dev);
357 if (!afe->reg_back_up)
358 dev_dbg(dev, "%s no reg_backup\n", __func__);
360 for (i = 0; i < afe->reg_back_up_list_num; i++)
361 mtk_regmap_write(regmap, afe->reg_back_up_list[i],
362 afe->reg_back_up[i]);
364 afe->suspended = false;
367 EXPORT_SYMBOL_GPL(mtk_afe_dai_resume);
369 MODULE_DESCRIPTION("Mediatek simple fe dai operator");
370 MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
371 MODULE_LICENSE("GPL v2");