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 <linux/pm_runtime.h>
12 #include <sound/pcm_params.h>
13 #include <sound/soc.h>
14 #include <sound/soc-dai.h>
15
16 #include "acp3x.h"
17
18 #define DRV_NAME "acp3x_rv_i2s_dma"
19
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,
29 .channels_min = 2,
30 .channels_max = 8,
31 .rates = SNDRV_PCM_RATE_8000_96000,
32 .rate_min = 8000,
33 .rate_max = 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,
39 };
40
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,
50 .channels_min = 2,
51 .channels_max = 2,
52 .rates = SNDRV_PCM_RATE_8000_48000,
53 .rate_min = 8000,
54 .rate_max = 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,
60 };
61
i2s_irq_handler(int irq,void * dev_id)62 static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
63 {
64 struct i2s_dev_data *rv_i2s_data;
65 u16 play_flag, cap_flag;
66 u32 val;
67
68 rv_i2s_data = dev_id;
69 if (!rv_i2s_data)
70 return IRQ_NONE;
71
72 play_flag = 0;
73 cap_flag = 0;
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);
79 play_flag = 1;
80 }
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);
86 play_flag = 1;
87 }
88
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);
93 cap_flag = 1;
94 }
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);
100 cap_flag = 1;
101 }
102
103 if (play_flag | cap_flag)
104 return IRQ_HANDLED;
105 else
106 return IRQ_NONE;
107 }
108
config_acp3x_dma(struct i2s_stream_instance * rtd,int direction)109 static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
110 {
111 u16 page_idx;
112 u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
113 u32 reg_dma_size, reg_fifo_size;
114 dma_addr_t addr;
115
116 addr = rtd->dma_addr;
117
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;
122 break;
123 case I2S_SP_INSTANCE:
124 default:
125 val = ACP_SRAM_SP_PB_PTE_OFFSET;
126 }
127 } else {
128 switch (rtd->i2s_instance) {
129 case I2S_BT_INSTANCE:
130 val = ACP_SRAM_BT_CP_PTE_OFFSET;
131 break;
132 case I2S_SP_INSTANCE:
133 default:
134 val = ACP_SRAM_SP_CP_PTE_OFFSET;
135 }
136 }
137 /* Group Enable */
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);
142
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);
147
148 rv_writel(low, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val);
149 high |= BIT(31);
150 rv_writel(high, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val
151 + 4);
152 /* Move to next physically contiguos page */
153 val += 8;
154 addr += PAGE_SIZE;
155 }
156
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);
167 break;
168
169 case I2S_SP_INSTANCE:
170 default:
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);
178 }
179 } else {
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);
189 break;
190
191 case I2S_SP_INSTANCE:
192 default:
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);
200 }
201 }
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);
208 }
209
acp3x_dma_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)210 static int acp3x_dma_open(struct snd_soc_component *component,
211 struct snd_pcm_substream *substream)
212 {
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;
217 int ret;
218
219 runtime = substream->runtime;
220 prtd = asoc_substream_to_rtd(substream);
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);
224 if (!i2s_data)
225 return -EINVAL;
226
227 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
228 runtime->hw = acp3x_pcm_hardware_playback;
229 else
230 runtime->hw = acp3x_pcm_hardware_capture;
231
232 ret = snd_pcm_hw_constraint_integer(runtime,
233 SNDRV_PCM_HW_PARAM_PERIODS);
234 if (ret < 0) {
235 dev_err(component->dev, "set integer constraint failed\n");
236 kfree(i2s_data);
237 return ret;
238 }
239
240 i2s_data->acp3x_base = adata->acp3x_base;
241 runtime->private_data = i2s_data;
242 return ret;
243 }
244
245
acp3x_dma_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)246 static int acp3x_dma_hw_params(struct snd_soc_component *component,
247 struct snd_pcm_substream *substream,
248 struct snd_pcm_hw_params *params)
249 {
250 struct i2s_stream_instance *rtd;
251 struct snd_soc_pcm_runtime *prtd;
252 struct snd_soc_card *card;
253 struct acp3x_platform_info *pinfo;
254 struct i2s_dev_data *adata;
255 u64 size;
256
257 prtd = asoc_substream_to_rtd(substream);
258 card = prtd->card;
259 pinfo = snd_soc_card_get_drvdata(card);
260 adata = dev_get_drvdata(component->dev);
261 rtd = substream->runtime->private_data;
262 if (!rtd)
263 return -EINVAL;
264
265 if (pinfo) {
266 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
267 rtd->i2s_instance = pinfo->play_i2s_instance;
268 switch (rtd->i2s_instance) {
269 case I2S_BT_INSTANCE:
270 adata->play_stream = substream;
271 break;
272 case I2S_SP_INSTANCE:
273 default:
274 adata->i2ssp_play_stream = substream;
275 }
276 } else {
277 rtd->i2s_instance = pinfo->cap_i2s_instance;
278 switch (rtd->i2s_instance) {
279 case I2S_BT_INSTANCE:
280 adata->capture_stream = substream;
281 break;
282 case I2S_SP_INSTANCE:
283 default:
284 adata->i2ssp_capture_stream = substream;
285 }
286 }
287 } else {
288 pr_err("pinfo failed\n");
289 }
290 size = params_buffer_bytes(params);
291 rtd->dma_addr = substream->runtime->dma_addr;
292 rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
293 config_acp3x_dma(rtd, substream->stream);
294 return 0;
295 }
296
acp3x_dma_pointer(struct snd_soc_component * component,struct snd_pcm_substream * substream)297 static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
298 struct snd_pcm_substream *substream)
299 {
300 struct i2s_stream_instance *rtd;
301 u32 pos;
302 u32 buffersize;
303 u64 bytescount;
304
305 rtd = substream->runtime->private_data;
306
307 buffersize = frames_to_bytes(substream->runtime,
308 substream->runtime->buffer_size);
309 bytescount = acp_get_byte_count(rtd, substream->stream);
310 if (bytescount > rtd->bytescount)
311 bytescount -= rtd->bytescount;
312 pos = do_div(bytescount, buffersize);
313 return bytes_to_frames(substream->runtime, pos);
314 }
315
acp3x_dma_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)316 static int acp3x_dma_new(struct snd_soc_component *component,
317 struct snd_soc_pcm_runtime *rtd)
318 {
319 struct device *parent = component->dev->parent;
320 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
321 parent, MIN_BUFFER, MAX_BUFFER);
322 return 0;
323 }
324
acp3x_dma_mmap(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct vm_area_struct * vma)325 static int acp3x_dma_mmap(struct snd_soc_component *component,
326 struct snd_pcm_substream *substream,
327 struct vm_area_struct *vma)
328 {
329 return snd_pcm_lib_default_mmap(substream, vma);
330 }
331
acp3x_dma_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)332 static int acp3x_dma_close(struct snd_soc_component *component,
333 struct snd_pcm_substream *substream)
334 {
335 struct snd_soc_pcm_runtime *prtd;
336 struct i2s_dev_data *adata;
337 struct i2s_stream_instance *ins;
338
339 prtd = asoc_substream_to_rtd(substream);
340 component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
341 adata = dev_get_drvdata(component->dev);
342 ins = substream->runtime->private_data;
343 if (!ins)
344 return -EINVAL;
345
346 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
347 switch (ins->i2s_instance) {
348 case I2S_BT_INSTANCE:
349 adata->play_stream = NULL;
350 break;
351 case I2S_SP_INSTANCE:
352 default:
353 adata->i2ssp_play_stream = NULL;
354 }
355 } else {
356 switch (ins->i2s_instance) {
357 case I2S_BT_INSTANCE:
358 adata->capture_stream = NULL;
359 break;
360 case I2S_SP_INSTANCE:
361 default:
362 adata->i2ssp_capture_stream = NULL;
363 }
364 }
365
366 return 0;
367 }
368
369 static const struct snd_soc_component_driver acp3x_i2s_component = {
370 .name = DRV_NAME,
371 .open = acp3x_dma_open,
372 .close = acp3x_dma_close,
373 .hw_params = acp3x_dma_hw_params,
374 .pointer = acp3x_dma_pointer,
375 .mmap = acp3x_dma_mmap,
376 .pcm_construct = acp3x_dma_new,
377 };
378
acp3x_audio_probe(struct platform_device * pdev)379 static int acp3x_audio_probe(struct platform_device *pdev)
380 {
381 struct resource *res;
382 struct i2s_dev_data *adata;
383 unsigned int irqflags;
384 int status;
385
386 if (!pdev->dev.platform_data) {
387 dev_err(&pdev->dev, "platform_data not retrieved\n");
388 return -ENODEV;
389 }
390 irqflags = *((unsigned int *)(pdev->dev.platform_data));
391
392 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
393 if (!res) {
394 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
395 return -ENODEV;
396 }
397
398 adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
399 if (!adata)
400 return -ENOMEM;
401
402 adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
403 resource_size(res));
404 if (!adata->acp3x_base)
405 return -ENOMEM;
406
407 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
408 if (!res) {
409 dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
410 return -ENODEV;
411 }
412
413 adata->i2s_irq = res->start;
414
415 dev_set_drvdata(&pdev->dev, adata);
416 status = devm_snd_soc_register_component(&pdev->dev,
417 &acp3x_i2s_component,
418 NULL, 0);
419 if (status) {
420 dev_err(&pdev->dev, "Fail to register acp i2s component\n");
421 return -ENODEV;
422 }
423 status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
424 irqflags, "ACP3x_I2S_IRQ", adata);
425 if (status) {
426 dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
427 return -ENODEV;
428 }
429
430 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
431 pm_runtime_use_autosuspend(&pdev->dev);
432 pm_runtime_enable(&pdev->dev);
433 pm_runtime_allow(&pdev->dev);
434 return 0;
435 }
436
acp3x_audio_remove(struct platform_device * pdev)437 static int acp3x_audio_remove(struct platform_device *pdev)
438 {
439 pm_runtime_disable(&pdev->dev);
440 return 0;
441 }
442
acp3x_resume(struct device * dev)443 static int acp3x_resume(struct device *dev)
444 {
445 struct i2s_dev_data *adata;
446 u32 val, reg_val, frmt_val;
447
448 reg_val = 0;
449 frmt_val = 0;
450 adata = dev_get_drvdata(dev);
451
452 if (adata->play_stream && adata->play_stream->runtime) {
453 struct i2s_stream_instance *rtd =
454 adata->play_stream->runtime->private_data;
455 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
456 switch (rtd->i2s_instance) {
457 case I2S_BT_INSTANCE:
458 reg_val = mmACP_BTTDM_ITER;
459 frmt_val = mmACP_BTTDM_TXFRMT;
460 break;
461 case I2S_SP_INSTANCE:
462 default:
463 reg_val = mmACP_I2STDM_ITER;
464 frmt_val = mmACP_I2STDM_TXFRMT;
465 }
466 rv_writel((rtd->xfer_resolution << 3),
467 rtd->acp3x_base + reg_val);
468 }
469 if (adata->capture_stream && adata->capture_stream->runtime) {
470 struct i2s_stream_instance *rtd =
471 adata->capture_stream->runtime->private_data;
472 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
473 switch (rtd->i2s_instance) {
474 case I2S_BT_INSTANCE:
475 reg_val = mmACP_BTTDM_IRER;
476 frmt_val = mmACP_BTTDM_RXFRMT;
477 break;
478 case I2S_SP_INSTANCE:
479 default:
480 reg_val = mmACP_I2STDM_IRER;
481 frmt_val = mmACP_I2STDM_RXFRMT;
482 }
483 rv_writel((rtd->xfer_resolution << 3),
484 rtd->acp3x_base + reg_val);
485 }
486 if (adata->tdm_mode == TDM_ENABLE) {
487 rv_writel(adata->tdm_fmt, adata->acp3x_base + frmt_val);
488 val = rv_readl(adata->acp3x_base + reg_val);
489 rv_writel(val | 0x2, adata->acp3x_base + reg_val);
490 }
491 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
492 return 0;
493 }
494
495
acp3x_pcm_runtime_suspend(struct device * dev)496 static int acp3x_pcm_runtime_suspend(struct device *dev)
497 {
498 struct i2s_dev_data *adata;
499
500 adata = dev_get_drvdata(dev);
501
502 rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
503
504 return 0;
505 }
506
acp3x_pcm_runtime_resume(struct device * dev)507 static int acp3x_pcm_runtime_resume(struct device *dev)
508 {
509 struct i2s_dev_data *adata;
510
511 adata = dev_get_drvdata(dev);
512
513 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
514 return 0;
515 }
516
517 static const struct dev_pm_ops acp3x_pm_ops = {
518 .runtime_suspend = acp3x_pcm_runtime_suspend,
519 .runtime_resume = acp3x_pcm_runtime_resume,
520 .resume = acp3x_resume,
521 };
522
523 static struct platform_driver acp3x_dma_driver = {
524 .probe = acp3x_audio_probe,
525 .remove = acp3x_audio_remove,
526 .driver = {
527 .name = "acp3x_rv_i2s_dma",
528 .pm = &acp3x_pm_ops,
529 },
530 };
531
532 module_platform_driver(acp3x_dma_driver);
533
534 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
535 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
536 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
537 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
538 MODULE_LICENSE("GPL v2");
539 MODULE_ALIAS("platform:"DRV_NAME);
540