1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) 2 // 3 // This file is provided under a dual BSD/GPLv2 license. When using or 4 // redistributing this file, you may do so under either license. 5 // 6 // Copyright(c) 2021 Advanced Micro Devices, Inc. 7 // 8 // Authors: Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> 9 10 /* 11 * Generic interface for ACP audio blck PCM component 12 */ 13 14 #include <linux/platform_device.h> 15 #include <linux/module.h> 16 #include <linux/err.h> 17 #include <linux/io.h> 18 #include <sound/pcm_params.h> 19 #include <sound/soc.h> 20 #include <sound/soc-dai.h> 21 #include <linux/pm_runtime.h> 22 #include <linux/dma-mapping.h> 23 24 #include "amd.h" 25 26 #define DRV_NAME "acp_i2s_dma" 27 28 static const struct snd_pcm_hardware acp_pcm_hardware_playback = { 29 .info = SNDRV_PCM_INFO_INTERLEAVED | 30 SNDRV_PCM_INFO_BLOCK_TRANSFER | 31 SNDRV_PCM_INFO_BATCH | 32 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 33 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 34 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 35 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 36 SNDRV_PCM_FMTBIT_S32_LE, 37 .channels_min = 2, 38 .channels_max = 8, 39 .rates = SNDRV_PCM_RATE_8000_96000, 40 .rate_min = 8000, 41 .rate_max = 96000, 42 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE, 43 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE, 44 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE, 45 .periods_min = PLAYBACK_MIN_NUM_PERIODS, 46 .periods_max = PLAYBACK_MAX_NUM_PERIODS, 47 }; 48 49 static const struct snd_pcm_hardware acp_pcm_hardware_capture = { 50 .info = SNDRV_PCM_INFO_INTERLEAVED | 51 SNDRV_PCM_INFO_BLOCK_TRANSFER | 52 SNDRV_PCM_INFO_BATCH | 53 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID | 54 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME, 55 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 | 56 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE | 57 SNDRV_PCM_FMTBIT_S32_LE, 58 .channels_min = 2, 59 .channels_max = 2, 60 .rates = SNDRV_PCM_RATE_8000_48000, 61 .rate_min = 8000, 62 .rate_max = 48000, 63 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE, 64 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE, 65 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE, 66 .periods_min = CAPTURE_MIN_NUM_PERIODS, 67 .periods_max = CAPTURE_MAX_NUM_PERIODS, 68 }; 69 70 int acp_machine_select(struct acp_dev_data *adata) 71 { 72 struct snd_soc_acpi_mach *mach; 73 int size; 74 75 size = sizeof(*adata->machines); 76 mach = snd_soc_acpi_find_machine(adata->machines); 77 if (!mach) { 78 dev_err(adata->dev, "warning: No matching ASoC machine driver found\n"); 79 return -EINVAL; 80 } 81 82 adata->mach_dev = platform_device_register_data(adata->dev, mach->drv_name, 83 PLATFORM_DEVID_NONE, mach, size); 84 if (IS_ERR(adata->mach_dev)) 85 dev_warn(adata->dev, "Unable to register Machine device\n"); 86 87 return 0; 88 } 89 EXPORT_SYMBOL_NS_GPL(acp_machine_select, SND_SOC_ACP_COMMON); 90 91 static irqreturn_t i2s_irq_handler(int irq, void *data) 92 { 93 struct acp_dev_data *adata = data; 94 struct acp_resource *rsrc = adata->rsrc; 95 struct acp_stream *stream; 96 u16 i2s_flag = 0; 97 u32 ext_intr_stat, ext_intr_stat1, i; 98 99 if (!adata) 100 return IRQ_NONE; 101 102 if (adata->rsrc->no_of_ctrls == 2) 103 ext_intr_stat1 = readl(ACP_EXTERNAL_INTR_STAT(adata, (rsrc->irqp_used - 1))); 104 105 ext_intr_stat = readl(ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 106 107 for (i = 0; i < ACP_MAX_STREAM; i++) { 108 stream = adata->stream[i]; 109 if (stream && (ext_intr_stat & stream->irq_bit)) { 110 writel(stream->irq_bit, 111 ACP_EXTERNAL_INTR_STAT(adata, rsrc->irqp_used)); 112 snd_pcm_period_elapsed(stream->substream); 113 i2s_flag = 1; 114 break; 115 } 116 if (adata->rsrc->no_of_ctrls == 2) { 117 if (stream && (ext_intr_stat1 & stream->irq_bit)) { 118 writel(stream->irq_bit, ACP_EXTERNAL_INTR_STAT(adata, 119 (rsrc->irqp_used - 1))); 120 snd_pcm_period_elapsed(stream->substream); 121 i2s_flag = 1; 122 break; 123 } 124 } 125 } 126 if (i2s_flag) 127 return IRQ_HANDLED; 128 129 return IRQ_NONE; 130 } 131 132 static void config_pte_for_stream(struct acp_dev_data *adata, struct acp_stream *stream) 133 { 134 struct acp_resource *rsrc = adata->rsrc; 135 u32 pte_reg, pte_size, reg_val; 136 137 /* Use ATU base Group5 */ 138 pte_reg = ACPAXI2AXI_ATU_BASE_ADDR_GRP_5; 139 pte_size = ACPAXI2AXI_ATU_PAGE_SIZE_GRP_5; 140 stream->reg_offset = 0x02000000; 141 142 /* Group Enable */ 143 reg_val = rsrc->sram_pte_offset; 144 writel(reg_val | BIT(31), adata->acp_base + pte_reg); 145 writel(PAGE_SIZE_4K_ENABLE, adata->acp_base + pte_size); 146 writel(0x01, adata->acp_base + ACPAXI2AXI_ATU_CTRL); 147 } 148 149 static void config_acp_dma(struct acp_dev_data *adata, int cpu_id, int size) 150 { 151 struct acp_stream *stream = adata->stream[cpu_id]; 152 struct snd_pcm_substream *substream = stream->substream; 153 struct acp_resource *rsrc = adata->rsrc; 154 dma_addr_t addr = substream->dma_buffer.addr; 155 int num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT); 156 u32 low, high, val; 157 u16 page_idx; 158 159 val = stream->pte_offset; 160 161 for (page_idx = 0; page_idx < num_pages; page_idx++) { 162 /* Load the low address of page int ACP SRAM through SRBM */ 163 low = lower_32_bits(addr); 164 high = upper_32_bits(addr); 165 writel(low, adata->acp_base + rsrc->scratch_reg_offset + val); 166 high |= BIT(31); 167 writel(high, adata->acp_base + rsrc->scratch_reg_offset + val + 4); 168 169 /* Move to next physically contiguous page */ 170 val += 8; 171 addr += PAGE_SIZE; 172 } 173 } 174 175 static int acp_dma_open(struct snd_soc_component *component, struct snd_pcm_substream *substream) 176 { 177 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); 178 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); 179 struct snd_pcm_runtime *runtime = substream->runtime; 180 struct device *dev = component->dev; 181 struct acp_dev_data *adata = dev_get_drvdata(dev); 182 struct acp_stream *stream; 183 int stream_id = cpu_dai->driver->id * 2 + substream->stream; 184 int ret; 185 186 stream = kzalloc(sizeof(*stream), GFP_KERNEL); 187 if (!stream) 188 return -ENOMEM; 189 190 stream->substream = substream; 191 adata->stream[stream_id] = stream; 192 193 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) 194 runtime->hw = acp_pcm_hardware_playback; 195 else 196 runtime->hw = acp_pcm_hardware_capture; 197 198 ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 199 if (ret < 0) { 200 dev_err(component->dev, "set integer constraint failed\n"); 201 kfree(stream); 202 return ret; 203 } 204 runtime->private_data = stream; 205 206 writel(1, ACP_EXTERNAL_INTR_ENB(adata)); 207 208 return ret; 209 } 210 211 static int acp_dma_hw_params(struct snd_soc_component *component, 212 struct snd_pcm_substream *substream, 213 struct snd_pcm_hw_params *params) 214 { 215 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); 216 struct acp_dev_data *adata = snd_soc_component_get_drvdata(component); 217 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); 218 struct acp_stream *stream = substream->runtime->private_data; 219 int stream_id = cpu_dai->driver->id * 2 + substream->stream; 220 u64 size = params_buffer_bytes(params); 221 222 /* Configure ACP DMA block with params */ 223 config_pte_for_stream(adata, stream); 224 config_acp_dma(adata, stream_id, size); 225 226 return 0; 227 } 228 229 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component, 230 struct snd_pcm_substream *substream) 231 { 232 struct device *dev = component->dev; 233 struct acp_dev_data *adata = dev_get_drvdata(dev); 234 struct acp_stream *stream = substream->runtime->private_data; 235 u32 pos, buffersize; 236 u64 bytescount; 237 238 buffersize = frames_to_bytes(substream->runtime, 239 substream->runtime->buffer_size); 240 241 bytescount = acp_get_byte_count(adata, stream->dai_id, substream->stream); 242 243 if (bytescount > stream->bytescount) 244 bytescount -= stream->bytescount; 245 246 pos = do_div(bytescount, buffersize); 247 248 return bytes_to_frames(substream->runtime, pos); 249 } 250 251 static int acp_dma_new(struct snd_soc_component *component, 252 struct snd_soc_pcm_runtime *rtd) 253 { 254 struct device *parent = component->dev->parent; 255 256 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV, 257 parent, MIN_BUFFER, MAX_BUFFER); 258 return 0; 259 } 260 261 static int acp_dma_close(struct snd_soc_component *component, 262 struct snd_pcm_substream *substream) 263 { 264 struct snd_soc_pcm_runtime *soc_runtime = asoc_substream_to_rtd(substream); 265 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(soc_runtime, 0); 266 struct device *dev = component->dev; 267 struct acp_dev_data *adata = dev_get_drvdata(dev); 268 struct acp_stream *stream; 269 int stream_id = cpu_dai->driver->id * 2 + substream->stream; 270 271 stream = adata->stream[stream_id]; 272 kfree(stream); 273 adata->stream[stream_id] = NULL; 274 275 return 0; 276 } 277 278 static const struct snd_soc_component_driver acp_pcm_component = { 279 .name = DRV_NAME, 280 .open = acp_dma_open, 281 .close = acp_dma_close, 282 .hw_params = acp_dma_hw_params, 283 .pointer = acp_dma_pointer, 284 .pcm_construct = acp_dma_new, 285 .legacy_dai_naming = 1, 286 }; 287 288 int acp_platform_register(struct device *dev) 289 { 290 struct acp_dev_data *adata = dev_get_drvdata(dev); 291 struct snd_soc_dai_driver; 292 unsigned int status; 293 294 status = devm_request_irq(dev, adata->i2s_irq, i2s_irq_handler, 295 IRQF_SHARED, "ACP_I2S_IRQ", adata); 296 if (status) { 297 dev_err(dev, "ACP I2S IRQ request failed\n"); 298 return status; 299 } 300 301 status = devm_snd_soc_register_component(dev, &acp_pcm_component, 302 adata->dai_driver, 303 adata->num_dai); 304 if (status) { 305 dev_err(dev, "Fail to register acp i2s component\n"); 306 return status; 307 } 308 return 0; 309 } 310 EXPORT_SYMBOL_NS_GPL(acp_platform_register, SND_SOC_ACP_COMMON); 311 312 int acp_platform_unregister(struct device *dev) 313 { 314 struct acp_dev_data *adata = dev_get_drvdata(dev); 315 316 if (adata->mach_dev) 317 platform_device_unregister(adata->mach_dev); 318 return 0; 319 } 320 EXPORT_SYMBOL_NS_GPL(acp_platform_unregister, SND_SOC_ACP_COMMON); 321 322 MODULE_DESCRIPTION("AMD ACP PCM Driver"); 323 MODULE_LICENSE("Dual BSD/GPL"); 324 MODULE_ALIAS(DRV_NAME); 325