1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // AMD ALSA SoC PCM Driver 4 // 5 //Copyright 2016 Advanced Micro Devices, Inc. 6 7 #include <linux/platform_device.h> 8 #include <linux/module.h> 9 #include <linux/err.h> 10 #include <linux/io.h> 11 #include <sound/pcm_params.h> 12 #include <sound/soc.h> 13 #include <sound/soc-dai.h> 14 #include <linux/dma-mapping.h> 15 16 #include "acp3x.h" 17 18 #define DRV_NAME "acp3x_i2s_playcap" 19 20 static int acp3x_i2s_set_fmt(struct snd_soc_dai *cpu_dai, 21 unsigned int fmt) 22 { 23 struct i2s_dev_data *adata; 24 int mode; 25 26 adata = snd_soc_dai_get_drvdata(cpu_dai); 27 mode = fmt & SND_SOC_DAIFMT_FORMAT_MASK; 28 switch (mode) { 29 case SND_SOC_DAIFMT_I2S: 30 adata->tdm_mode = TDM_DISABLE; 31 break; 32 case SND_SOC_DAIFMT_DSP_A: 33 adata->tdm_mode = TDM_ENABLE; 34 break; 35 default: 36 return -EINVAL; 37 } 38 return 0; 39 } 40 41 static int acp3x_i2s_set_tdm_slot(struct snd_soc_dai *cpu_dai, 42 u32 tx_mask, u32 rx_mask, int slots, int slot_width) 43 { 44 struct i2s_dev_data *adata; 45 u32 frm_len; 46 u16 slot_len; 47 48 adata = snd_soc_dai_get_drvdata(cpu_dai); 49 50 /* These values are as per Hardware Spec */ 51 switch (slot_width) { 52 case SLOT_WIDTH_8: 53 slot_len = 8; 54 break; 55 case SLOT_WIDTH_16: 56 slot_len = 16; 57 break; 58 case SLOT_WIDTH_24: 59 slot_len = 24; 60 break; 61 case SLOT_WIDTH_32: 62 slot_len = 0; 63 break; 64 default: 65 return -EINVAL; 66 } 67 frm_len = FRM_LEN | (slots << 15) | (slot_len << 18); 68 adata->tdm_fmt = frm_len; 69 return 0; 70 } 71 72 static int acp3x_i2s_hwparams(struct snd_pcm_substream *substream, 73 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) 74 { 75 struct i2s_stream_instance *rtd; 76 struct snd_soc_pcm_runtime *prtd; 77 struct snd_soc_card *card; 78 struct acp3x_platform_info *pinfo; 79 struct i2s_dev_data *adata; 80 u32 val; 81 u32 reg_val, frmt_reg; 82 83 prtd = asoc_substream_to_rtd(substream); 84 rtd = substream->runtime->private_data; 85 card = prtd->card; 86 adata = snd_soc_dai_get_drvdata(dai); 87 pinfo = snd_soc_card_get_drvdata(card); 88 if (pinfo) { 89 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 90 rtd->i2s_instance = pinfo->play_i2s_instance; 91 else 92 rtd->i2s_instance = pinfo->cap_i2s_instance; 93 } 94 95 /* These values are as per Hardware Spec */ 96 switch (params_format(params)) { 97 case SNDRV_PCM_FORMAT_U8: 98 case SNDRV_PCM_FORMAT_S8: 99 rtd->xfer_resolution = 0x0; 100 break; 101 case SNDRV_PCM_FORMAT_S16_LE: 102 rtd->xfer_resolution = 0x02; 103 break; 104 case SNDRV_PCM_FORMAT_S24_LE: 105 rtd->xfer_resolution = 0x04; 106 break; 107 case SNDRV_PCM_FORMAT_S32_LE: 108 rtd->xfer_resolution = 0x05; 109 break; 110 default: 111 return -EINVAL; 112 } 113 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 114 switch (rtd->i2s_instance) { 115 case I2S_BT_INSTANCE: 116 reg_val = mmACP_BTTDM_ITER; 117 frmt_reg = mmACP_BTTDM_TXFRMT; 118 break; 119 case I2S_SP_INSTANCE: 120 default: 121 reg_val = mmACP_I2STDM_ITER; 122 frmt_reg = mmACP_I2STDM_TXFRMT; 123 } 124 } else { 125 switch (rtd->i2s_instance) { 126 case I2S_BT_INSTANCE: 127 reg_val = mmACP_BTTDM_IRER; 128 frmt_reg = mmACP_BTTDM_RXFRMT; 129 break; 130 case I2S_SP_INSTANCE: 131 default: 132 reg_val = mmACP_I2STDM_IRER; 133 frmt_reg = mmACP_I2STDM_RXFRMT; 134 } 135 } 136 if (adata->tdm_mode) { 137 val = rv_readl(rtd->acp3x_base + reg_val); 138 rv_writel(val | 0x2, rtd->acp3x_base + reg_val); 139 rv_writel(adata->tdm_fmt, rtd->acp3x_base + frmt_reg); 140 } 141 val = rv_readl(rtd->acp3x_base + reg_val); 142 val &= ~ACP3x_ITER_IRER_SAMP_LEN_MASK; 143 val = val | (rtd->xfer_resolution << 3); 144 rv_writel(val, rtd->acp3x_base + reg_val); 145 return 0; 146 } 147 148 static int acp3x_i2s_trigger(struct snd_pcm_substream *substream, 149 int cmd, struct snd_soc_dai *dai) 150 { 151 struct i2s_stream_instance *rtd; 152 u32 ret, val, period_bytes, reg_val, ier_val, water_val; 153 u32 buf_size, buf_reg; 154 155 rtd = substream->runtime->private_data; 156 period_bytes = frames_to_bytes(substream->runtime, 157 substream->runtime->period_size); 158 buf_size = frames_to_bytes(substream->runtime, 159 substream->runtime->buffer_size); 160 switch (cmd) { 161 case SNDRV_PCM_TRIGGER_START: 162 case SNDRV_PCM_TRIGGER_RESUME: 163 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 164 rtd->bytescount = acp_get_byte_count(rtd, 165 substream->stream); 166 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 167 switch (rtd->i2s_instance) { 168 case I2S_BT_INSTANCE: 169 water_val = 170 mmACP_BT_TX_INTR_WATERMARK_SIZE; 171 reg_val = mmACP_BTTDM_ITER; 172 ier_val = mmACP_BTTDM_IER; 173 buf_reg = mmACP_BT_TX_RINGBUFSIZE; 174 break; 175 case I2S_SP_INSTANCE: 176 default: 177 water_val = 178 mmACP_I2S_TX_INTR_WATERMARK_SIZE; 179 reg_val = mmACP_I2STDM_ITER; 180 ier_val = mmACP_I2STDM_IER; 181 buf_reg = mmACP_I2S_TX_RINGBUFSIZE; 182 } 183 } else { 184 switch (rtd->i2s_instance) { 185 case I2S_BT_INSTANCE: 186 water_val = 187 mmACP_BT_RX_INTR_WATERMARK_SIZE; 188 reg_val = mmACP_BTTDM_IRER; 189 ier_val = mmACP_BTTDM_IER; 190 buf_reg = mmACP_BT_RX_RINGBUFSIZE; 191 break; 192 case I2S_SP_INSTANCE: 193 default: 194 water_val = 195 mmACP_I2S_RX_INTR_WATERMARK_SIZE; 196 reg_val = mmACP_I2STDM_IRER; 197 ier_val = mmACP_I2STDM_IER; 198 buf_reg = mmACP_I2S_RX_RINGBUFSIZE; 199 } 200 } 201 rv_writel(period_bytes, rtd->acp3x_base + water_val); 202 rv_writel(buf_size, rtd->acp3x_base + buf_reg); 203 val = rv_readl(rtd->acp3x_base + reg_val); 204 val = val | BIT(0); 205 rv_writel(val, rtd->acp3x_base + reg_val); 206 rv_writel(1, rtd->acp3x_base + ier_val); 207 ret = 0; 208 break; 209 case SNDRV_PCM_TRIGGER_STOP: 210 case SNDRV_PCM_TRIGGER_SUSPEND: 211 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 212 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 213 switch (rtd->i2s_instance) { 214 case I2S_BT_INSTANCE: 215 reg_val = mmACP_BTTDM_ITER; 216 break; 217 case I2S_SP_INSTANCE: 218 default: 219 reg_val = mmACP_I2STDM_ITER; 220 } 221 222 } else { 223 switch (rtd->i2s_instance) { 224 case I2S_BT_INSTANCE: 225 reg_val = mmACP_BTTDM_IRER; 226 break; 227 case I2S_SP_INSTANCE: 228 default: 229 reg_val = mmACP_I2STDM_IRER; 230 } 231 } 232 val = rv_readl(rtd->acp3x_base + reg_val); 233 val = val & ~BIT(0); 234 rv_writel(val, rtd->acp3x_base + reg_val); 235 236 if (!(rv_readl(rtd->acp3x_base + mmACP_BTTDM_ITER) & BIT(0)) && 237 !(rv_readl(rtd->acp3x_base + mmACP_BTTDM_IRER) & BIT(0))) 238 rv_writel(0, rtd->acp3x_base + mmACP_BTTDM_IER); 239 if (!(rv_readl(rtd->acp3x_base + mmACP_I2STDM_ITER) & BIT(0)) && 240 !(rv_readl(rtd->acp3x_base + mmACP_I2STDM_IRER) & BIT(0))) 241 rv_writel(0, rtd->acp3x_base + mmACP_I2STDM_IER); 242 ret = 0; 243 break; 244 default: 245 ret = -EINVAL; 246 break; 247 } 248 249 return ret; 250 } 251 252 static const struct snd_soc_dai_ops acp3x_i2s_dai_ops = { 253 .hw_params = acp3x_i2s_hwparams, 254 .trigger = acp3x_i2s_trigger, 255 .set_fmt = acp3x_i2s_set_fmt, 256 .set_tdm_slot = acp3x_i2s_set_tdm_slot, 257 }; 258 259 static const struct snd_soc_component_driver acp3x_dai_component = { 260 .name = DRV_NAME, 261 }; 262 263 static struct snd_soc_dai_driver acp3x_i2s_dai = { 264 .playback = { 265 .rates = SNDRV_PCM_RATE_8000_96000, 266 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 267 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE, 268 .channels_min = 2, 269 .channels_max = 8, 270 .rate_min = 8000, 271 .rate_max = 96000, 272 }, 273 .capture = { 274 .rates = SNDRV_PCM_RATE_8000_48000, 275 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 276 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE, 277 .channels_min = 2, 278 .channels_max = 2, 279 .rate_min = 8000, 280 .rate_max = 48000, 281 }, 282 .ops = &acp3x_i2s_dai_ops, 283 }; 284 285 static int acp3x_dai_probe(struct platform_device *pdev) 286 { 287 struct resource *res; 288 struct i2s_dev_data *adata; 289 int ret; 290 291 adata = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dev_data), 292 GFP_KERNEL); 293 if (!adata) 294 return -ENOMEM; 295 296 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 297 if (!res) { 298 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n"); 299 return -ENOMEM; 300 } 301 adata->acp3x_base = devm_ioremap(&pdev->dev, res->start, 302 resource_size(res)); 303 if (!adata->acp3x_base) 304 return -ENOMEM; 305 306 adata->i2s_irq = res->start; 307 dev_set_drvdata(&pdev->dev, adata); 308 ret = devm_snd_soc_register_component(&pdev->dev, 309 &acp3x_dai_component, &acp3x_i2s_dai, 1); 310 if (ret) { 311 dev_err(&pdev->dev, "Fail to register acp i2s dai\n"); 312 return -ENODEV; 313 } 314 return 0; 315 } 316 317 static int acp3x_dai_remove(struct platform_device *pdev) 318 { 319 /* As we use devm_ memory alloc there is nothing TBD here */ 320 321 return 0; 322 } 323 324 static struct platform_driver acp3x_dai_driver = { 325 .probe = acp3x_dai_probe, 326 .remove = acp3x_dai_remove, 327 .driver = { 328 .name = "acp3x_i2s_playcap", 329 }, 330 }; 331 332 module_platform_driver(acp3x_dai_driver); 333 334 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com"); 335 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver"); 336 MODULE_LICENSE("GPL v2"); 337 MODULE_ALIAS("platform:"DRV_NAME); 338