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 of_device_id fsl_rpmsg_ids[] = { 179 { .compatible = "fsl,imx7ulp-rpmsg-audio", .data = &imx7ulp_data}, 180 { .compatible = "fsl,imx8mm-rpmsg-audio", .data = &imx8mm_data}, 181 { .compatible = "fsl,imx8mn-rpmsg-audio", .data = &imx8mn_data}, 182 { .compatible = "fsl,imx8mp-rpmsg-audio", .data = &imx8mp_data}, 183 { .compatible = "fsl,imx8ulp-rpmsg-audio", .data = &imx7ulp_data}, 184 { .compatible = "fsl,imx93-rpmsg-audio", .data = &imx93_data}, 185 { /* sentinel */ } 186 }; 187 MODULE_DEVICE_TABLE(of, fsl_rpmsg_ids); 188 189 static int fsl_rpmsg_probe(struct platform_device *pdev) 190 { 191 struct device_node *np = pdev->dev.of_node; 192 struct snd_soc_dai_driver *dai_drv; 193 const char *dai_name; 194 struct fsl_rpmsg *rpmsg; 195 int ret; 196 197 dai_drv = devm_kzalloc(&pdev->dev, sizeof(struct snd_soc_dai_driver), GFP_KERNEL); 198 if (!dai_drv) 199 return -ENOMEM; 200 memcpy(dai_drv, &fsl_rpmsg_dai, sizeof(fsl_rpmsg_dai)); 201 202 rpmsg = devm_kzalloc(&pdev->dev, sizeof(struct fsl_rpmsg), GFP_KERNEL); 203 if (!rpmsg) 204 return -ENOMEM; 205 206 rpmsg->soc_data = of_device_get_match_data(&pdev->dev); 207 208 if (rpmsg->soc_data) { 209 dai_drv->playback.rates = rpmsg->soc_data->rates; 210 dai_drv->capture.rates = rpmsg->soc_data->rates; 211 dai_drv->playback.formats = rpmsg->soc_data->formats; 212 dai_drv->capture.formats = rpmsg->soc_data->formats; 213 } 214 215 /* Use rpmsg channel name as cpu dai name */ 216 ret = of_property_read_string(np, "fsl,rpmsg-channel-name", &dai_name); 217 if (ret) { 218 if (ret == -EINVAL) { 219 dai_name = "rpmsg-audio-channel"; 220 } else { 221 dev_err(&pdev->dev, "Failed to get rpmsg channel name: %d!\n", ret); 222 return ret; 223 } 224 } 225 dai_drv->name = dai_name; 226 227 if (of_property_read_bool(np, "fsl,enable-lpa")) { 228 rpmsg->enable_lpa = 1; 229 rpmsg->buffer_size = LPA_LARGE_BUFFER_SIZE; 230 } else { 231 rpmsg->buffer_size = IMX_DEFAULT_DMABUF_SIZE; 232 } 233 234 /* Get the optional clocks */ 235 rpmsg->ipg = devm_clk_get_optional(&pdev->dev, "ipg"); 236 if (IS_ERR(rpmsg->ipg)) 237 return PTR_ERR(rpmsg->ipg); 238 239 rpmsg->mclk = devm_clk_get_optional(&pdev->dev, "mclk"); 240 if (IS_ERR(rpmsg->mclk)) 241 return PTR_ERR(rpmsg->mclk); 242 243 rpmsg->dma = devm_clk_get_optional(&pdev->dev, "dma"); 244 if (IS_ERR(rpmsg->dma)) 245 return PTR_ERR(rpmsg->dma); 246 247 rpmsg->pll8k = devm_clk_get_optional(&pdev->dev, "pll8k"); 248 if (IS_ERR(rpmsg->pll8k)) 249 return PTR_ERR(rpmsg->pll8k); 250 251 rpmsg->pll11k = devm_clk_get_optional(&pdev->dev, "pll11k"); 252 if (IS_ERR(rpmsg->pll11k)) 253 return PTR_ERR(rpmsg->pll11k); 254 255 platform_set_drvdata(pdev, rpmsg); 256 pm_runtime_enable(&pdev->dev); 257 258 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component, 259 dai_drv, 1); 260 if (ret) 261 goto err_pm_disable; 262 263 return 0; 264 265 err_pm_disable: 266 pm_runtime_disable(&pdev->dev); 267 return ret; 268 } 269 270 static void fsl_rpmsg_remove(struct platform_device *pdev) 271 { 272 struct fsl_rpmsg *rpmsg = platform_get_drvdata(pdev); 273 274 pm_runtime_disable(&pdev->dev); 275 276 if (rpmsg->card_pdev) 277 platform_device_unregister(rpmsg->card_pdev); 278 } 279 280 #ifdef CONFIG_PM 281 static int fsl_rpmsg_runtime_resume(struct device *dev) 282 { 283 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev); 284 int ret; 285 286 ret = clk_prepare_enable(rpmsg->ipg); 287 if (ret) { 288 dev_err(dev, "failed to enable ipg clock: %d\n", ret); 289 goto ipg_err; 290 } 291 292 ret = clk_prepare_enable(rpmsg->dma); 293 if (ret) { 294 dev_err(dev, "Failed to enable dma clock %d\n", ret); 295 goto dma_err; 296 } 297 298 return 0; 299 300 dma_err: 301 clk_disable_unprepare(rpmsg->ipg); 302 ipg_err: 303 return ret; 304 } 305 306 static int fsl_rpmsg_runtime_suspend(struct device *dev) 307 { 308 struct fsl_rpmsg *rpmsg = dev_get_drvdata(dev); 309 310 clk_disable_unprepare(rpmsg->dma); 311 clk_disable_unprepare(rpmsg->ipg); 312 313 return 0; 314 } 315 #endif 316 317 static const struct dev_pm_ops fsl_rpmsg_pm_ops = { 318 SET_RUNTIME_PM_OPS(fsl_rpmsg_runtime_suspend, 319 fsl_rpmsg_runtime_resume, 320 NULL) 321 }; 322 323 static struct platform_driver fsl_rpmsg_driver = { 324 .probe = fsl_rpmsg_probe, 325 .remove_new = fsl_rpmsg_remove, 326 .driver = { 327 .name = "fsl_rpmsg", 328 .pm = &fsl_rpmsg_pm_ops, 329 .of_match_table = fsl_rpmsg_ids, 330 }, 331 }; 332 module_platform_driver(fsl_rpmsg_driver); 333 334 MODULE_DESCRIPTION("Freescale SoC Audio PRMSG CPU Interface"); 335 MODULE_AUTHOR("Shengjiu Wang <shengjiu.wang@nxp.com>"); 336 MODULE_ALIAS("platform:fsl_rpmsg"); 337 MODULE_LICENSE("GPL"); 338