1 // SPDX-License-Identifier: GPL-2.0+
3 // AMD ALSA SoC PCM Driver
5 //Copyright 2016 Advanced Micro Devices, Inc.
7 #include <linux/platform_device.h>
8 #include <linux/module.h>
11 #include <linux/pm_runtime.h>
12 #include <sound/pcm_params.h>
13 #include <sound/soc.h>
14 #include <sound/soc-dai.h>
18 #define DRV_NAME "acp3x_rv_i2s_dma"
20 static const struct snd_pcm_hardware acp3x_pcm_hardware_playback = {
21 .info = SNDRV_PCM_INFO_INTERLEAVED |
22 SNDRV_PCM_INFO_BLOCK_TRANSFER |
23 SNDRV_PCM_INFO_BATCH |
24 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
25 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
26 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
27 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
28 SNDRV_PCM_FMTBIT_S32_LE,
31 .rates = SNDRV_PCM_RATE_8000_96000,
34 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
35 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
36 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
37 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
38 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
41 static const struct snd_pcm_hardware acp3x_pcm_hardware_capture = {
42 .info = SNDRV_PCM_INFO_INTERLEAVED |
43 SNDRV_PCM_INFO_BLOCK_TRANSFER |
44 SNDRV_PCM_INFO_BATCH |
45 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
46 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
47 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
48 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S24_LE |
49 SNDRV_PCM_FMTBIT_S32_LE,
52 .rates = SNDRV_PCM_RATE_8000_48000,
55 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
56 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
57 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
58 .periods_min = CAPTURE_MIN_NUM_PERIODS,
59 .periods_max = CAPTURE_MAX_NUM_PERIODS,
62 static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
64 struct i2s_dev_data *rv_i2s_data;
65 u16 play_flag, cap_flag;
74 val = rv_readl(rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
75 if ((val & BIT(BT_TX_THRESHOLD)) && rv_i2s_data->play_stream) {
76 rv_writel(BIT(BT_TX_THRESHOLD), rv_i2s_data->acp3x_base +
77 mmACP_EXTERNAL_INTR_STAT);
78 snd_pcm_period_elapsed(rv_i2s_data->play_stream);
81 if ((val & BIT(I2S_TX_THRESHOLD)) &&
82 rv_i2s_data->i2ssp_play_stream) {
83 rv_writel(BIT(I2S_TX_THRESHOLD),
84 rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
85 snd_pcm_period_elapsed(rv_i2s_data->i2ssp_play_stream);
89 if ((val & BIT(BT_RX_THRESHOLD)) && rv_i2s_data->capture_stream) {
90 rv_writel(BIT(BT_RX_THRESHOLD), rv_i2s_data->acp3x_base +
91 mmACP_EXTERNAL_INTR_STAT);
92 snd_pcm_period_elapsed(rv_i2s_data->capture_stream);
95 if ((val & BIT(I2S_RX_THRESHOLD)) &&
96 rv_i2s_data->i2ssp_capture_stream) {
97 rv_writel(BIT(I2S_RX_THRESHOLD),
98 rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
99 snd_pcm_period_elapsed(rv_i2s_data->i2ssp_capture_stream);
103 if (play_flag | cap_flag)
109 static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
112 u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
113 u32 reg_dma_size, reg_fifo_size;
116 addr = rtd->dma_addr;
118 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
119 switch (rtd->i2s_instance) {
120 case I2S_BT_INSTANCE:
121 val = ACP_SRAM_BT_PB_PTE_OFFSET;
123 case I2S_SP_INSTANCE:
125 val = ACP_SRAM_SP_PB_PTE_OFFSET;
128 switch (rtd->i2s_instance) {
129 case I2S_BT_INSTANCE:
130 val = ACP_SRAM_BT_CP_PTE_OFFSET;
132 case I2S_SP_INSTANCE:
134 val = ACP_SRAM_SP_CP_PTE_OFFSET;
138 rv_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp3x_base +
139 mmACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
140 rv_writel(PAGE_SIZE_4K_ENABLE, rtd->acp3x_base +
141 mmACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
143 for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
144 /* Load the low address of page int ACP SRAM through SRBM */
145 low = lower_32_bits(addr);
146 high = upper_32_bits(addr);
148 rv_writel(low, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val);
150 rv_writel(high, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val
152 /* Move to next physically contiguos page */
157 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
158 switch (rtd->i2s_instance) {
159 case I2S_BT_INSTANCE:
160 reg_dma_size = mmACP_BT_TX_DMA_SIZE;
161 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
162 BT_PB_FIFO_ADDR_OFFSET;
163 reg_fifo_addr = mmACP_BT_TX_FIFOADDR;
164 reg_fifo_size = mmACP_BT_TX_FIFOSIZE;
165 rv_writel(I2S_BT_TX_MEM_WINDOW_START,
166 rtd->acp3x_base + mmACP_BT_TX_RINGBUFADDR);
169 case I2S_SP_INSTANCE:
171 reg_dma_size = mmACP_I2S_TX_DMA_SIZE;
172 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
173 SP_PB_FIFO_ADDR_OFFSET;
174 reg_fifo_addr = mmACP_I2S_TX_FIFOADDR;
175 reg_fifo_size = mmACP_I2S_TX_FIFOSIZE;
176 rv_writel(I2S_SP_TX_MEM_WINDOW_START,
177 rtd->acp3x_base + mmACP_I2S_TX_RINGBUFADDR);
180 switch (rtd->i2s_instance) {
181 case I2S_BT_INSTANCE:
182 reg_dma_size = mmACP_BT_RX_DMA_SIZE;
183 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
184 BT_CAPT_FIFO_ADDR_OFFSET;
185 reg_fifo_addr = mmACP_BT_RX_FIFOADDR;
186 reg_fifo_size = mmACP_BT_RX_FIFOSIZE;
187 rv_writel(I2S_BT_RX_MEM_WINDOW_START,
188 rtd->acp3x_base + mmACP_BT_RX_RINGBUFADDR);
191 case I2S_SP_INSTANCE:
193 reg_dma_size = mmACP_I2S_RX_DMA_SIZE;
194 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
195 SP_CAPT_FIFO_ADDR_OFFSET;
196 reg_fifo_addr = mmACP_I2S_RX_FIFOADDR;
197 reg_fifo_size = mmACP_I2S_RX_FIFOSIZE;
198 rv_writel(I2S_SP_RX_MEM_WINDOW_START,
199 rtd->acp3x_base + mmACP_I2S_RX_RINGBUFADDR);
202 rv_writel(DMA_SIZE, rtd->acp3x_base + reg_dma_size);
203 rv_writel(acp_fifo_addr, rtd->acp3x_base + reg_fifo_addr);
204 rv_writel(FIFO_SIZE, rtd->acp3x_base + reg_fifo_size);
205 rv_writel(BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
206 | BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD),
207 rtd->acp3x_base + mmACP_EXTERNAL_INTR_CNTL);
210 static int acp3x_dma_open(struct snd_soc_component *component,
211 struct snd_pcm_substream *substream)
213 struct snd_pcm_runtime *runtime;
214 struct snd_soc_pcm_runtime *prtd;
215 struct i2s_dev_data *adata;
216 struct i2s_stream_instance *i2s_data;
219 runtime = substream->runtime;
220 prtd = substream->private_data;
221 component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
222 adata = dev_get_drvdata(component->dev);
223 i2s_data = kzalloc(sizeof(*i2s_data), GFP_KERNEL);
227 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
228 runtime->hw = acp3x_pcm_hardware_playback;
230 runtime->hw = acp3x_pcm_hardware_capture;
232 ret = snd_pcm_hw_constraint_integer(runtime,
233 SNDRV_PCM_HW_PARAM_PERIODS);
235 dev_err(component->dev, "set integer constraint failed\n");
240 if (!adata->play_stream && !adata->capture_stream &&
241 adata->i2ssp_play_stream && !adata->i2ssp_capture_stream)
242 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
244 i2s_data->acp3x_base = adata->acp3x_base;
245 runtime->private_data = i2s_data;
250 static int acp3x_dma_hw_params(struct snd_soc_component *component,
251 struct snd_pcm_substream *substream,
252 struct snd_pcm_hw_params *params)
254 struct i2s_stream_instance *rtd;
255 struct snd_soc_pcm_runtime *prtd;
256 struct snd_soc_card *card;
257 struct acp3x_platform_info *pinfo;
258 struct i2s_dev_data *adata;
261 prtd = substream->private_data;
263 pinfo = snd_soc_card_get_drvdata(card);
264 adata = dev_get_drvdata(component->dev);
265 rtd = substream->runtime->private_data;
270 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
271 rtd->i2s_instance = pinfo->play_i2s_instance;
272 switch (rtd->i2s_instance) {
273 case I2S_BT_INSTANCE:
274 adata->play_stream = substream;
276 case I2S_SP_INSTANCE:
278 adata->i2ssp_play_stream = substream;
281 rtd->i2s_instance = pinfo->cap_i2s_instance;
282 switch (rtd->i2s_instance) {
283 case I2S_BT_INSTANCE:
284 adata->capture_stream = substream;
286 case I2S_SP_INSTANCE:
288 adata->i2ssp_capture_stream = substream;
292 pr_err("pinfo failed\n");
294 size = params_buffer_bytes(params);
295 rtd->dma_addr = substream->dma_buffer.addr;
296 rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
297 config_acp3x_dma(rtd, substream->stream);
301 static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
302 struct snd_pcm_substream *substream)
304 struct snd_soc_pcm_runtime *prtd;
305 struct snd_soc_card *card;
306 struct i2s_stream_instance *rtd;
311 prtd = substream->private_data;
313 rtd = substream->runtime->private_data;
315 buffersize = frames_to_bytes(substream->runtime,
316 substream->runtime->buffer_size);
317 bytescount = acp_get_byte_count(rtd, substream->stream);
318 if (bytescount > rtd->bytescount)
319 bytescount -= rtd->bytescount;
320 pos = do_div(bytescount, buffersize);
321 return bytes_to_frames(substream->runtime, pos);
324 static int acp3x_dma_new(struct snd_soc_component *component,
325 struct snd_soc_pcm_runtime *rtd)
327 struct device *parent = component->dev->parent;
328 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
329 parent, MIN_BUFFER, MAX_BUFFER);
333 static int acp3x_dma_mmap(struct snd_soc_component *component,
334 struct snd_pcm_substream *substream,
335 struct vm_area_struct *vma)
337 return snd_pcm_lib_default_mmap(substream, vma);
340 static int acp3x_dma_close(struct snd_soc_component *component,
341 struct snd_pcm_substream *substream)
343 struct snd_soc_pcm_runtime *prtd;
344 struct i2s_dev_data *adata;
346 prtd = substream->private_data;
347 component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
348 adata = dev_get_drvdata(component->dev);
351 /* Disable ACP irq, when the current stream is being closed and
352 * another stream is also not active.
354 if (!adata->play_stream && !adata->capture_stream &&
355 !adata->i2ssp_play_stream && !adata->i2ssp_capture_stream)
356 rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
357 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
358 adata->play_stream = NULL;
359 adata->i2ssp_play_stream = NULL;
361 adata->capture_stream = NULL;
362 adata->i2ssp_capture_stream = NULL;
367 static const struct snd_soc_component_driver acp3x_i2s_component = {
369 .open = acp3x_dma_open,
370 .close = acp3x_dma_close,
371 .hw_params = acp3x_dma_hw_params,
372 .pointer = acp3x_dma_pointer,
373 .mmap = acp3x_dma_mmap,
374 .pcm_construct = acp3x_dma_new,
377 static int acp3x_audio_probe(struct platform_device *pdev)
379 struct resource *res;
380 struct i2s_dev_data *adata;
381 unsigned int irqflags;
384 if (!pdev->dev.platform_data) {
385 dev_err(&pdev->dev, "platform_data not retrieved\n");
388 irqflags = *((unsigned int *)(pdev->dev.platform_data));
390 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
392 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
396 adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
400 adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
402 if (!adata->acp3x_base)
405 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
407 dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
411 adata->i2s_irq = res->start;
413 dev_set_drvdata(&pdev->dev, adata);
414 status = devm_snd_soc_register_component(&pdev->dev,
415 &acp3x_i2s_component,
418 dev_err(&pdev->dev, "Fail to register acp i2s component\n");
421 status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
422 irqflags, "ACP3x_I2S_IRQ", adata);
424 dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
428 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
429 pm_runtime_use_autosuspend(&pdev->dev);
430 pm_runtime_enable(&pdev->dev);
431 pm_runtime_allow(&pdev->dev);
435 static int acp3x_audio_remove(struct platform_device *pdev)
437 pm_runtime_disable(&pdev->dev);
441 static int acp3x_resume(struct device *dev)
443 struct i2s_dev_data *adata;
444 u32 val, reg_val, frmt_val;
448 adata = dev_get_drvdata(dev);
450 if (adata->play_stream && adata->play_stream->runtime) {
451 struct i2s_stream_instance *rtd =
452 adata->play_stream->runtime->private_data;
453 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
454 switch (rtd->i2s_instance) {
455 case I2S_BT_INSTANCE:
456 reg_val = mmACP_BTTDM_ITER;
457 frmt_val = mmACP_BTTDM_TXFRMT;
459 case I2S_SP_INSTANCE:
461 reg_val = mmACP_I2STDM_ITER;
462 frmt_val = mmACP_I2STDM_TXFRMT;
464 rv_writel((rtd->xfer_resolution << 3),
465 rtd->acp3x_base + reg_val);
467 if (adata->capture_stream && adata->capture_stream->runtime) {
468 struct i2s_stream_instance *rtd =
469 adata->capture_stream->runtime->private_data;
470 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
471 switch (rtd->i2s_instance) {
472 case I2S_BT_INSTANCE:
473 reg_val = mmACP_BTTDM_IRER;
474 frmt_val = mmACP_BTTDM_RXFRMT;
476 case I2S_SP_INSTANCE:
478 reg_val = mmACP_I2STDM_IRER;
479 frmt_val = mmACP_I2STDM_RXFRMT;
481 rv_writel((rtd->xfer_resolution << 3),
482 rtd->acp3x_base + reg_val);
484 if (adata->tdm_mode == TDM_ENABLE) {
485 rv_writel(adata->tdm_fmt, adata->acp3x_base + frmt_val);
486 val = rv_readl(adata->acp3x_base + reg_val);
487 rv_writel(val | 0x2, adata->acp3x_base + reg_val);
489 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
494 static int acp3x_pcm_runtime_suspend(struct device *dev)
496 struct i2s_dev_data *adata;
498 adata = dev_get_drvdata(dev);
500 rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
505 static int acp3x_pcm_runtime_resume(struct device *dev)
507 struct i2s_dev_data *adata;
509 adata = dev_get_drvdata(dev);
511 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
515 static const struct dev_pm_ops acp3x_pm_ops = {
516 .runtime_suspend = acp3x_pcm_runtime_suspend,
517 .runtime_resume = acp3x_pcm_runtime_resume,
518 .resume = acp3x_resume,
521 static struct platform_driver acp3x_dma_driver = {
522 .probe = acp3x_audio_probe,
523 .remove = acp3x_audio_remove,
525 .name = "acp3x_rv_i2s_dma",
530 module_platform_driver(acp3x_dma_driver);
532 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
533 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
534 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
535 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
536 MODULE_LICENSE("GPL v2");
537 MODULE_ALIAS("platform:"DRV_NAME);