sound/soc/fsl/fsl_rpmsg.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 // Copyright 2018-2021 NXP
   3
   4 #include <linux/clk.h>
   5 #include <linux/clk-provider.h>
   6 #include <linux/delay.h>
   7 #include <linux/dmaengine.h>
   8 #include <linux/module.h>
   9 #include <linux/of.h>
  10 #include <linux/pm_runtime.h>
  11 #include <linux/rpmsg.h>
  12 #include <linux/slab.h>
  13 #include <sound/core.h>
  14 #include <sound/dmaengine_pcm.h>
  15 #include <sound/pcm_params.h>
  16
  17 #include "fsl_rpmsg.h"
  18 #include "imx-pcm.h"
  19
  20 #define FSL_RPMSG_RATES        (SNDRV_PCM_RATE_8000 | \
  21                                 SNDRV_PCM_RATE_16000 | \
  22                                 SNDRV_PCM_RATE_48000)
  23 #define FSL_RPMSG_FORMATS       SNDRV_PCM_FMTBIT_S16_LE
  24
  25 /* 192kHz/32bit/2ch/60s size is 0x574e00 */
  26 #define LPA_LARGE_BUFFER_SIZE  (0x6000000)
  27
  28 static const unsigned int fsl_rpmsg_rates[] = {
  29         8000, 11025, 16000, 22050, 44100,
  30         32000, 48000, 96000, 88200, 176400, 192000,
  31         352800, 384000, 705600, 768000, 1411200, 2822400,
  32 };
  33
  34 static const struct snd_pcm_hw_constraint_list fsl_rpmsg_rate_constraints = {
  35         .count = ARRAY_SIZE(fsl_rpmsg_rates),
  36         .list = fsl_rpmsg_rates,
  37 };
  38
  39 static int fsl_rpmsg_hw_params(struct snd_pcm_substream *substream,
  40                                struct snd_pcm_hw_params *params,
  41                                struct snd_soc_dai *dai)
  42 {
  43         struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
  44         struct clk *p = rpmsg->mclk, *pll = NULL, *npll = NULL;
  45         u64 rate = params_rate(params);
  46         int ret = 0;
  47
  48         /* Get current pll parent */
  49         while (p && rpmsg->pll8k && rpmsg->pll11k) {
  50                 struct clk *pp = clk_get_parent(p);
  51
  52                 if (clk_is_match(pp, rpmsg->pll8k) ||
  53                     clk_is_match(pp, rpmsg->pll11k)) {
  54                         pll = pp;
  55                         break;
  56                 }
  57                 p = pp;
  58         }
  59
  60         /* Switch to another pll parent if needed. */
  61         if (pll) {
  62                 npll = (do_div(rate, 8000) ? rpmsg->pll11k : rpmsg->pll8k);
  63                 if (!clk_is_match(pll, npll)) {
  64                         ret = clk_set_parent(p, npll);
  65                         if (ret < 0)
  66                                 dev_warn(dai->dev, "failed to set parent %s: %d\n",
  67                                          __clk_get_name(npll), ret);
  68                 }
  69         }
  70
  71         if (!(rpmsg->mclk_streams & BIT(substream->stream))) {
  72                 ret = clk_prepare_enable(rpmsg->mclk);
  73                 if (ret) {
  74                         dev_err(dai->dev, "failed to enable mclk: %d\n", ret);
  75                         return ret;
  76                 }
  77
  78                 rpmsg->mclk_streams |= BIT(substream->stream);
  79         }
  80
  81         return ret;
  82 }
  83
  84 static int fsl_rpmsg_hw_free(struct snd_pcm_substream *substream,
  85                              struct snd_soc_dai *dai)
  86 {
  87         struct fsl_rpmsg *rpmsg = snd_soc_dai_get_drvdata(dai);
  88
  89         if (rpmsg->mclk_streams & BIT(substream->stream)) {
  90                 clk_disable_unprepare(rpmsg->mclk);
  91                 rpmsg->mclk_streams &= ~BIT(substream->stream);
  92         }
  93
  94         return 0;
  95 }
  96
  97 static int fsl_rpmsg_startup(struct snd_pcm_substream *substream,
  98                              struct snd_soc_dai *cpu_dai)
  99 {
 100         int ret;
 101
 102         ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
 103                                          SNDRV_PCM_HW_PARAM_RATE,
 104                                          &fsl_rpmsg_rate_constraints);
 105
 106         return ret;
 107 }
 108
 109 static const struct snd_soc_dai_ops fsl_rpmsg_dai_ops = {
 110         .startup        = fsl_rpmsg_startup,
 111         .hw_params      = fsl_rpmsg_hw_params,
 112         .hw_free        = fsl_rpmsg_hw_free,
 113 };
 114
 115 static struct snd_soc_dai_driver fsl_rpmsg_dai = {
 116         .playback = {
 117                 .stream_name = "CPU-Playback",
 118                 .channels_min = 2,
 119                 .channels_max = 32,
 120                 .rates = SNDRV_PCM_RATE_KNOT,
 121                 .formats = FSL_RPMSG_FORMATS,
 122         },
 123         .capture = {
 124                 .stream_name = "CPU-Capture",
 125                 .channels_min = 2,
 126                 .channels_max = 32,
 127                 .rates = SNDRV_PCM_RATE_KNOT,
 128                 .formats = FSL_RPMSG_FORMATS,
 129         },
 130         .symmetric_rate        = 1,
 131         .symmetric_channels    = 1,
 132         .symmetric_sample_bits = 1,
 133         .ops = &fsl_rpmsg_dai_ops,
 134 };
 135
 136 static const struct snd_soc_component_driver fsl_component = {
 137         .name                   = "fsl-rpmsg",
 138 };
 139
 140 static const struct fsl_rpmsg_soc_data imx7ulp_data = {
 141         .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
 142                  SNDRV_PCM_RATE_48000,
 143         .formats = SNDRV_PCM_FMTBIT_S16_LE,
 144 };
 145
 146 static const struct fsl_rpmsg_soc_data imx8mm_data = {
 147         .rates = SNDRV_PCM_RATE_KNOT,
 148         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 149                    SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_DSD_U8 |
 150                    SNDRV_PCM_FMTBIT_DSD_U16_LE | SNDRV_PCM_FMTBIT_DSD_U32_LE,
 151 };
 152
 153 static const struct fsl_rpmsg_soc_data imx8mn_data = {
 154         .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
 155                  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
 156                  SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
 157                  SNDRV_PCM_RATE_192000,
 158         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 159                    SNDRV_PCM_FMTBIT_S32_LE,
 160 };
 161
 162 static const struct fsl_rpmsg_soc_data imx8mp_data = {
 163         .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
 164                  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
 165                  SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
 166                  SNDRV_PCM_RATE_192000,
 167         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 168                    SNDRV_PCM_FMTBIT_S32_LE,
 169 };
 170
 171 static const struct fsl_rpmsg_soc_data imx93_data = {
 172         .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 |
 173                  SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000,
 174         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 175                    SNDRV_PCM_FMTBIT_S32_LE,
 176 };
 177
 178 static const struct fsl_rpmsg_soc_data imx95_data = {
 179         .rates = SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_32000 |
 180                  SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
 181                  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000,
 182         .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |
 183                    SNDRV_PCM_FMTBIT_S32_LE,
 184 };
 185
 186 static const struct of_device_id fsl_rpmsg_ids[] = {
 187         { .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data},
 188         { .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data},
 189         { .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data},
 190         { .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data},
 191         { .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data},
 192         { .compatible = "fsl,imx93-rpmsg-audio", .data = &imx93_data},
 193         { .compatible = "fsl,imx95-rpmsg-audio", .data = &imx95_data},
 194         { /* sentinel */ }
 195 };
 196 MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids);
 197
 198 static int fsl_rpmsg_probe(struct platform_device *pdev)
 199 {
 200         struct device_node *np = pdev->dev.of_node;
 201         struct snd_soc_dai_driver *dai_drv;
 202         const char *dai_name;
 203         struct fsl_rpmsg *rpmsg;
 204         int ret;
 205
 206         dai_drv = devm_kzalloc(&pdev->dev, sizeof(struct snd_soc_dai_driver), GFP_KERNEL);
 207         if (!dai_drv)
 208                 return -ENOMEM;
 209         memcpy(dai_drv, &fsl_rpmsg_dai, sizeof(fsl_rpmsg_dai));
 210
 211         rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL);
 212         if (!rpmsg)
 213                 return -ENOMEM;
 214
 215         rpmsg->soc_data = of_device_get_match_data(&pdev->dev);
 216
 217         if (rpmsg->soc_data) {
 218                 dai_drv->playback.rates = rpmsg->soc_data->rates;
 219                 dai_drv->capture.rates = rpmsg->soc_data->rates;
 220                 dai_drv->playback.formats = rpmsg->soc_data->formats;
 221                 dai_drv->capture.formats = rpmsg->soc_data->formats;
 222         }
 223
 224         /* Use rpmsg channel name as cpu dai name */
 225         ret = of_property_read_string(np, "fsl,rpmsg-channel-name", &dai_name);
 226         if (ret) {
 227                 if (ret == -EINVAL) {
 228                         dai_name = "rpmsg-audio-channel";
 229                 } else {
 230                         dev_err(&pdev->dev, "Failed to get rpmsg channel name: %d!\n", ret);
 231                         return ret;
 232                 }
 233         }
 234         dai_drv->name = dai_name;
 235
 236         if (of_property_read_bool(np, "fsl,enable-lpa")) {
 237                 rpmsg->enable_lpa = 1;
 238                 rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE;
 239         } else {
 240                 rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE;
 241         }
 242
 243         /* Get the optional clocks */
 244         rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg");
 245         if (IS_ERR(rpmsg->ipg))
 246                 return PTR_ERR(rpmsg->ipg);
 247
 248         rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk");
 249         if (IS_ERR(rpmsg->mclk))
 250                 return PTR_ERR(rpmsg->mclk);
 251
 252         rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma");
 253         if (IS_ERR(rpmsg->dma))
 254                 return PTR_ERR(rpmsg->dma);
 255
 256         rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k");
 257         if (IS_ERR(rpmsg->pll8k))
 258                 return PTR_ERR(rpmsg->pll8k);
 259
 260         rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k");
 261         if (IS_ERR(rpmsg->pll11k))
 262                 return PTR_ERR(rpmsg->pll11k);
 263
 264         platform_set_drvdata(pdev, rpmsg);
 265         pm_runtime_enable(&pdev->dev);
 266
 267         ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
 268                                               dai_drv, 1);
 269         if (ret)
 270                 goto err_pm_disable;
 271
 272         return 0;
 273
 274 err_pm_disable:
 275         pm_runtime_disable(&pdev->dev);
 276         return ret;
 277 }
 278
 279 static void fsl_rpmsg_remove(struct platform_device *pdev)
 280 {
 281         struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev);
 282
 283         pm_runtime_disable(&pdev->dev);
 284
 285         if (rpmsg->card_pdev)
 286                 platform_device_unregister(rpmsg->card_pdev);
 287 }
 288
 289 static int fsl_rpmsg_runtime_resume(struct device *dev)
 290 {
 291         struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
 292         int ret;
 293
 294         ret = clk_prepare_enable(rpmsg->ipg);
 295         if (ret) {
 296                 dev_err(dev, "failed to enable ipg clock: %d\n", ret);
 297                 goto ipg_err;
 298         }
 299
 300         ret = clk_prepare_enable(rpmsg->dma);
 301         if (ret) {
 302                 dev_err(dev, "Failed to enable dma clock %d\n", ret);
 303                 goto dma_err;
 304         }
 305
 306         return 0;
 307
 308 dma_err:
 309         clk_disable_unprepare(rpmsg->ipg);
 310 ipg_err:
 311         return ret;
 312 }
 313
 314 static int fsl_rpmsg_runtime_suspend(struct device *dev)
 315 {
 316         struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev);
 317
 318         clk_disable_unprepare(rpmsg->dma);
 319         clk_disable_unprepare(rpmsg->ipg);
 320
 321         return 0;
 322 }
 323
 324 static const struct dev_pm_ops fsl_rpmsg_pm_ops = {
 325         RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend, fsl_rpmsg_runtime_resume,
 326                        NULL)
 327 };
 328
 329 static struct platform_driver fsl_rpmsg_driver = {
 330         .probe  = fsl_rpmsg_probe,
 331         .remove = fsl_rpmsg_remove,
 332         .driver = {
 333                 .name = "fsl_rpmsg",
 334                 .pm = pm_ptr(&fsl_rpmsg_pm_ops),
 335                 .of_match_table = fsl_rpmsg_ids,
 336         },
 337 };
 338 module_platform_driver(fsl_rpmsg_driver);
 339
 340 MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface");
 341 MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>");
 342 MODULE_ALIAS("platform:fsl_rpmsg");
 343 MODULE_LICENSE("GPL");