sound/soc/mediatek/common/mtk-afe-fe-dai.c

   1 /*
   2  * mtk-afe-fe-dais.c  --  Mediatek afe fe dai operator
   3  *
   4  * Copyright (c) 2016 MediaTek Inc.
   5  * Author: Garlic Tseng <garlic.tseng@mediatek.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 and
   9  * only version 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/regmap.h>
  20 #include <sound/soc.h>
  21 #include "mtk-afe-fe-dai.h"
  22 #include "mtk-base-afe.h"
  23
  24 #define AFE_BASE_END_OFFSET 8
  25
  26 int mtk_regmap_update_bits(struct regmap *map, int reg, unsigned int mask,
  27                            unsigned int val)
  28 {
  29         if (reg < 0)
  30                 return 0;
  31         return regmap_update_bits(map, reg, mask, val);
  32 }
  33
  34 int mtk_regmap_write(struct regmap *map, int reg, unsigned int val)
  35 {
  36         if (reg < 0)
  37                 return 0;
  38         return regmap_write(map, reg, val);
  39 }
  40
  41 int mtk_afe_fe_startup(struct snd_pcm_substream *substream,
  42                        struct snd_soc_dai *dai)
  43 {
  44         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  45         struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
  46         struct snd_pcm_runtime *runtime = substream->runtime;
  47         int memif_num = rtd->cpu_dai->id;
  48         struct mtk_base_afe_memif *memif = &afe->memif[memif_num];
  49         const struct snd_pcm_hardware *mtk_afe_hardware = afe->mtk_afe_hardware;
  50         int ret;
  51
  52         memif->substream = substream;
  53
  54         snd_pcm_hw_constraint_step(substream->runtime, 0,
  55                                    SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 16);
  56         /* enable agent */
  57         mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
  58                                1 << memif->data->agent_disable_shift,
  59                                0 << memif->data->agent_disable_shift);
  60
  61         snd_soc_set_runtime_hwparams(substream, mtk_afe_hardware);
  62
  63         /*
  64          * Capture cannot use ping-pong buffer since hw_ptr at IRQ may be
  65          * smaller than period_size due to AFE's internal buffer.
  66          * This easily leads to overrun when avail_min is period_size.
  67          * One more period can hold the possible unread buffer.
  68          */
  69         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
  70                 int periods_max = mtk_afe_hardware->periods_max;
  71
  72                 ret = snd_pcm_hw_constraint_minmax(runtime,
  73                                                    SNDRV_PCM_HW_PARAM_PERIODS,
  74                                                    3, periods_max);
  75                 if (ret < 0) {
  76                         dev_err(afe->dev, "hw_constraint_minmax failed\n");
  77                         return ret;
  78                 }
  79         }
  80
  81         ret = snd_pcm_hw_constraint_integer(runtime,
  82                                             SNDRV_PCM_HW_PARAM_PERIODS);
  83         if (ret < 0)
  84                 dev_err(afe->dev, "snd_pcm_hw_constraint_integer failed\n");
  85
  86         /* dynamic allocate irq to memif */
  87         if (memif->irq_usage < 0) {
  88                 int irq_id = mtk_dynamic_irq_acquire(afe);
  89
  90                 if (irq_id != afe->irqs_size) {
  91                         /* link */
  92                         memif->irq_usage = irq_id;
  93                 } else {
  94                         dev_err(afe->dev, "%s() error: no more asys irq\n",
  95                                 __func__);
  96                         ret = -EBUSY;
  97                 }
  98         }
  99         return ret;
 100 }
 101 EXPORT_SYMBOL_GPL(mtk_afe_fe_startup);
 102
 103 void mtk_afe_fe_shutdown(struct snd_pcm_substream *substream,
 104                          struct snd_soc_dai *dai)
 105 {
 106         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 107         struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
 108         struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
 109         int irq_id;
 110
 111         irq_id = memif->irq_usage;
 112
 113         mtk_regmap_update_bits(afe->regmap, memif->data->agent_disable_reg,
 114                                1 << memif->data->agent_disable_shift,
 115                                1 << memif->data->agent_disable_shift);
 116
 117         if (!memif->const_irq) {
 118                 mtk_dynamic_irq_release(afe, irq_id);
 119                 memif->irq_usage = -1;
 120                 memif->substream = NULL;
 121         }
 122 }
 123 EXPORT_SYMBOL_GPL(mtk_afe_fe_shutdown);
 124
 125 int mtk_afe_fe_hw_params(struct snd_pcm_substream *substream,
 126                          struct snd_pcm_hw_params *params,
 127                          struct snd_soc_dai *dai)
 128 {
 129         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 130         struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
 131         struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
 132         int msb_at_bit33 = 0;
 133         int ret, fs = 0;
 134
 135         ret = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params));
 136         if (ret < 0)
 137                 return ret;
 138
 139         msb_at_bit33 = upper_32_bits(substream->runtime->dma_addr) ? 1 : 0;
 140         memif->phys_buf_addr = lower_32_bits(substream->runtime->dma_addr);
 141         memif->buffer_size = substream->runtime->dma_bytes;
 142
 143         /* start */
 144         mtk_regmap_write(afe->regmap, memif->data->reg_ofs_base,
 145                          memif->phys_buf_addr);
 146         /* end */
 147         mtk_regmap_write(afe->regmap,
 148                          memif->data->reg_ofs_base + AFE_BASE_END_OFFSET,
 149                          memif->phys_buf_addr + memif->buffer_size - 1);
 150
 151         /* set MSB to 33-bit */
 152         mtk_regmap_update_bits(afe->regmap, memif->data->msb_reg,
 153                                1 << memif->data->msb_shift,
 154                                msb_at_bit33 << memif->data->msb_shift);
 155
 156         /* set channel */
 157         if (memif->data->mono_shift >= 0) {
 158                 unsigned int mono = (params_channels(params) == 1) ? 1 : 0;
 159
 160                 mtk_regmap_update_bits(afe->regmap, memif->data->mono_reg,
 161                                        1 << memif->data->mono_shift,
 162                                        mono << memif->data->mono_shift);
 163         }
 164
 165         /* set rate */
 166         if (memif->data->fs_shift < 0)
 167                 return 0;
 168
 169         fs = afe->memif_fs(substream, params_rate(params));
 170
 171         if (fs < 0)
 172                 return -EINVAL;
 173
 174         mtk_regmap_update_bits(afe->regmap, memif->data->fs_reg,
 175                                memif->data->fs_maskbit << memif->data->fs_shift,
 176                                fs << memif->data->fs_shift);
 177
 178         return 0;
 179 }
 180 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_params);
 181
 182 int mtk_afe_fe_hw_free(struct snd_pcm_substream *substream,
 183                        struct snd_soc_dai *dai)
 184 {
 185         return snd_pcm_lib_free_pages(substream);
 186 }
 187 EXPORT_SYMBOL_GPL(mtk_afe_fe_hw_free);
 188
 189 int mtk_afe_fe_trigger(struct snd_pcm_substream *substream, int cmd,
 190                        struct snd_soc_dai *dai)
 191 {
 192         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 193         struct snd_pcm_runtime * const runtime = substream->runtime;
 194         struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
 195         struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
 196         struct mtk_base_afe_irq *irqs = &afe->irqs[memif->irq_usage];
 197         const struct mtk_base_irq_data *irq_data = irqs->irq_data;
 198         unsigned int counter = runtime->period_size;
 199         int fs;
 200
 201         dev_dbg(afe->dev, "%s %s cmd=%d\n", __func__, memif->data->name, cmd);
 202
 203         switch (cmd) {
 204         case SNDRV_PCM_TRIGGER_START:
 205         case SNDRV_PCM_TRIGGER_RESUME:
 206                 if (memif->data->enable_shift >= 0)
 207                         mtk_regmap_update_bits(afe->regmap,
 208                                                memif->data->enable_reg,
 209                                                1 << memif->data->enable_shift,
 210                                                1 << memif->data->enable_shift);
 211
 212                 /* set irq counter */
 213                 mtk_regmap_update_bits(afe->regmap, irq_data->irq_cnt_reg,
 214                                        irq_data->irq_cnt_maskbit
 215                                        << irq_data->irq_cnt_shift,
 216                                        counter << irq_data->irq_cnt_shift);
 217
 218                 /* set irq fs */
 219                 fs = afe->irq_fs(substream, runtime->rate);
 220
 221                 if (fs < 0)
 222                         return -EINVAL;
 223
 224                 mtk_regmap_update_bits(afe->regmap, irq_data->irq_fs_reg,
 225                                        irq_data->irq_fs_maskbit
 226                                        << irq_data->irq_fs_shift,
 227                                        fs << irq_data->irq_fs_shift);
 228
 229                 /* enable interrupt */
 230                 mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
 231                                        1 << irq_data->irq_en_shift,
 232                                        1 << irq_data->irq_en_shift);
 233
 234                 return 0;
 235         case SNDRV_PCM_TRIGGER_STOP:
 236         case SNDRV_PCM_TRIGGER_SUSPEND:
 237                 mtk_regmap_update_bits(afe->regmap, memif->data->enable_reg,
 238                                        1 << memif->data->enable_shift, 0);
 239                 /* disable interrupt */
 240                 mtk_regmap_update_bits(afe->regmap, irq_data->irq_en_reg,
 241                                        1 << irq_data->irq_en_shift,
 242                                        0 << irq_data->irq_en_shift);
 243                 /* and clear pending IRQ */
 244                 mtk_regmap_write(afe->regmap, irq_data->irq_clr_reg,
 245                                  1 << irq_data->irq_clr_shift);
 246                 return 0;
 247         default:
 248                 return -EINVAL;
 249         }
 250 }
 251 EXPORT_SYMBOL_GPL(mtk_afe_fe_trigger);
 252
 253 int mtk_afe_fe_prepare(struct snd_pcm_substream *substream,
 254                        struct snd_soc_dai *dai)
 255 {
 256         struct snd_soc_pcm_runtime *rtd  = substream->private_data;
 257         struct mtk_base_afe *afe = snd_soc_platform_get_drvdata(rtd->platform);
 258         struct mtk_base_afe_memif *memif = &afe->memif[rtd->cpu_dai->id];
 259         int hd_audio = 0;
 260
 261         /* set hd mode */
 262         switch (substream->runtime->format) {
 263         case SNDRV_PCM_FORMAT_S16_LE:
 264                 hd_audio = 0;
 265                 break;
 266         case SNDRV_PCM_FORMAT_S32_LE:
 267                 hd_audio = 1;
 268                 break;
 269         case SNDRV_PCM_FORMAT_S24_LE:
 270                 hd_audio = 1;
 271                 break;
 272         default:
 273                 dev_err(afe->dev, "%s() error: unsupported format %d\n",
 274                         __func__, substream->runtime->format);
 275                 break;
 276         }
 277
 278         mtk_regmap_update_bits(afe->regmap, memif->data->hd_reg,
 279                                1 << memif->data->hd_shift,
 280                                hd_audio << memif->data->hd_shift);
 281
 282         return 0;
 283 }
 284 EXPORT_SYMBOL_GPL(mtk_afe_fe_prepare);
 285
 286 const struct snd_soc_dai_ops mtk_afe_fe_ops = {
 287         .startup        = mtk_afe_fe_startup,
 288         .shutdown       = mtk_afe_fe_shutdown,
 289         .hw_params      = mtk_afe_fe_hw_params,
 290         .hw_free        = mtk_afe_fe_hw_free,
 291         .prepare        = mtk_afe_fe_prepare,
 292         .trigger        = mtk_afe_fe_trigger,
 293 };
 294 EXPORT_SYMBOL_GPL(mtk_afe_fe_ops);
 295
 296 static DEFINE_MUTEX(irqs_lock);
 297 int mtk_dynamic_irq_acquire(struct mtk_base_afe *afe)
 298 {
 299         int i;
 300
 301         mutex_lock(&afe->irq_alloc_lock);
 302         for (i = 0; i < afe->irqs_size; ++i) {
 303                 if (afe->irqs[i].irq_occupyed == 0) {
 304                         afe->irqs[i].irq_occupyed = 1;
 305                         mutex_unlock(&afe->irq_alloc_lock);
 306                         return i;
 307                 }
 308         }
 309         mutex_unlock(&afe->irq_alloc_lock);
 310         return afe->irqs_size;
 311 }
 312 EXPORT_SYMBOL_GPL(mtk_dynamic_irq_acquire);
 313
 314 int mtk_dynamic_irq_release(struct mtk_base_afe *afe, int irq_id)
 315 {
 316         mutex_lock(&afe->irq_alloc_lock);
 317         if (irq_id >= 0 && irq_id < afe->irqs_size) {
 318                 afe->irqs[irq_id].irq_occupyed = 0;
 319                 mutex_unlock(&afe->irq_alloc_lock);
 320                 return 0;
 321         }
 322         mutex_unlock(&afe->irq_alloc_lock);
 323         return -EINVAL;
 324 }
 325 EXPORT_SYMBOL_GPL(mtk_dynamic_irq_release);
 326
 327 int mtk_afe_dai_suspend(struct snd_soc_dai *dai)
 328 {
 329         struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
 330         struct device *dev = afe->dev;
 331         struct regmap *regmap = afe->regmap;
 332         int i;
 333
 334         if (pm_runtime_status_suspended(dev) || afe->suspended)
 335                 return 0;
 336
 337         if (!afe->reg_back_up)
 338                 afe->reg_back_up =
 339                         devm_kcalloc(dev, afe->reg_back_up_list_num,
 340                                      sizeof(unsigned int), GFP_KERNEL);
 341
 342         for (i = 0; i < afe->reg_back_up_list_num; i++)
 343                 regmap_read(regmap, afe->reg_back_up_list[i],
 344                             &afe->reg_back_up[i]);
 345
 346         afe->suspended = true;
 347         afe->runtime_suspend(dev);
 348         return 0;
 349 }
 350 EXPORT_SYMBOL_GPL(mtk_afe_dai_suspend);
 351
 352 int mtk_afe_dai_resume(struct snd_soc_dai *dai)
 353 {
 354         struct mtk_base_afe *afe = dev_get_drvdata(dai->dev);
 355         struct device *dev = afe->dev;
 356         struct regmap *regmap = afe->regmap;
 357         int i = 0;
 358
 359         if (pm_runtime_status_suspended(dev) || !afe->suspended)
 360                 return 0;
 361
 362         afe->runtime_resume(dev);
 363
 364         if (!afe->reg_back_up)
 365                 dev_dbg(dev, "%s no reg_backup\n", __func__);
 366
 367         for (i = 0; i < afe->reg_back_up_list_num; i++)
 368                 mtk_regmap_write(regmap, afe->reg_back_up_list[i],
 369                                  afe->reg_back_up[i]);
 370
 371         afe->suspended = false;
 372         return 0;
 373 }
 374 EXPORT_SYMBOL_GPL(mtk_afe_dai_resume);
 375
 376 MODULE_DESCRIPTION("Mediatek simple fe dai operator");
 377 MODULE_AUTHOR("Garlic Tseng <garlic.tseng@mediatek.com>");
 378 MODULE_LICENSE("GPL v2");
 379