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_S32_LE,
28 .channels_min = 2,
29 .channels_max = 8,
30 .rates = SNDRV_PCM_RATE_8000_96000,
31 .rate_min = 8000,
32 .rate_max = 96000,
33 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
34 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
35 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
36 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
37 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
38 };
39
40 static const struct snd_pcm_hardware acp3x_pcm_hardware_capture = {
41 .info = SNDRV_PCM_INFO_INTERLEAVED |
42 SNDRV_PCM_INFO_BLOCK_TRANSFER |
43 SNDRV_PCM_INFO_BATCH |
44 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
45 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
46 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8 |
47 SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S32_LE,
48 .channels_min = 2,
49 .channels_max = 2,
50 .rates = SNDRV_PCM_RATE_8000_48000,
51 .rate_min = 8000,
52 .rate_max = 48000,
53 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
54 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
55 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
56 .periods_min = CAPTURE_MIN_NUM_PERIODS,
57 .periods_max = CAPTURE_MAX_NUM_PERIODS,
58 };
59
60 static irqreturn_t i2s_irq_handler(int irq, void *dev_id)
61 {
62 struct i2s_dev_data *rv_i2s_data;
63 u16 play_flag, cap_flag;
64 u32 val;
65
66 rv_i2s_data = dev_id;
67 if (!rv_i2s_data)
68 return IRQ_NONE;
69
70 play_flag = 0;
71 cap_flag = 0;
72 val = rv_readl(rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
73 if ((val & BIT(BT_TX_THRESHOLD)) && rv_i2s_data->play_stream) {
74 rv_writel(BIT(BT_TX_THRESHOLD), rv_i2s_data->acp3x_base +
75 mmACP_EXTERNAL_INTR_STAT);
76 snd_pcm_period_elapsed(rv_i2s_data->play_stream);
77 play_flag = 1;
78 }
79 if ((val & BIT(I2S_TX_THRESHOLD)) &&
80 rv_i2s_data->i2ssp_play_stream) {
81 rv_writel(BIT(I2S_TX_THRESHOLD),
82 rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
83 snd_pcm_period_elapsed(rv_i2s_data->i2ssp_play_stream);
84 play_flag = 1;
85 }
86
87 if ((val & BIT(BT_RX_THRESHOLD)) && rv_i2s_data->capture_stream) {
88 rv_writel(BIT(BT_RX_THRESHOLD), rv_i2s_data->acp3x_base +
89 mmACP_EXTERNAL_INTR_STAT);
90 snd_pcm_period_elapsed(rv_i2s_data->capture_stream);
91 cap_flag = 1;
92 }
93 if ((val & BIT(I2S_RX_THRESHOLD)) &&
94 rv_i2s_data->i2ssp_capture_stream) {
95 rv_writel(BIT(I2S_RX_THRESHOLD),
96 rv_i2s_data->acp3x_base + mmACP_EXTERNAL_INTR_STAT);
97 snd_pcm_period_elapsed(rv_i2s_data->i2ssp_capture_stream);
98 cap_flag = 1;
99 }
100
101 if (play_flag | cap_flag)
102 return IRQ_HANDLED;
103 else
104 return IRQ_NONE;
105 }
106
107 static void config_acp3x_dma(struct i2s_stream_instance *rtd, int direction)
108 {
109 u16 page_idx;
110 u32 low, high, val, acp_fifo_addr, reg_fifo_addr;
111 u32 reg_dma_size, reg_fifo_size;
112 dma_addr_t addr;
113
114 addr = rtd->dma_addr;
115
116 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
117 switch (rtd->i2s_instance) {
118 case I2S_BT_INSTANCE:
119 val = ACP_SRAM_BT_PB_PTE_OFFSET;
120 break;
121 case I2S_SP_INSTANCE:
122 default:
123 val = ACP_SRAM_SP_PB_PTE_OFFSET;
124 }
125 } else {
126 switch (rtd->i2s_instance) {
127 case I2S_BT_INSTANCE:
128 val = ACP_SRAM_BT_CP_PTE_OFFSET;
129 break;
130 case I2S_SP_INSTANCE:
131 default:
132 val = ACP_SRAM_SP_CP_PTE_OFFSET;
133 }
134 }
135 /* Group Enable */
136 rv_writel(ACP_SRAM_PTE_OFFSET | BIT(31), rtd->acp3x_base +
137 mmACPAXI2AXI_ATU_BASE_ADDR_GRP_1);
138 rv_writel(PAGE_SIZE_4K_ENABLE, rtd->acp3x_base +
139 mmACPAXI2AXI_ATU_PAGE_SIZE_GRP_1);
140
141 for (page_idx = 0; page_idx < rtd->num_pages; page_idx++) {
142 /* Load the low address of page int ACP SRAM through SRBM */
143 low = lower_32_bits(addr);
144 high = upper_32_bits(addr);
145
146 rv_writel(low, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val);
147 high |= BIT(31);
148 rv_writel(high, rtd->acp3x_base + mmACP_SCRATCH_REG_0 + val
149 + 4);
150 /* Move to next physically contiguous page */
151 val += 8;
152 addr += PAGE_SIZE;
153 }
154
155 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
156 switch (rtd->i2s_instance) {
157 case I2S_BT_INSTANCE:
158 reg_dma_size = mmACP_BT_TX_DMA_SIZE;
159 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
160 BT_PB_FIFO_ADDR_OFFSET;
161 reg_fifo_addr = mmACP_BT_TX_FIFOADDR;
162 reg_fifo_size = mmACP_BT_TX_FIFOSIZE;
163 rv_writel(I2S_BT_TX_MEM_WINDOW_START,
164 rtd->acp3x_base + mmACP_BT_TX_RINGBUFADDR);
165 break;
166
167 case I2S_SP_INSTANCE:
168 default:
169 reg_dma_size = mmACP_I2S_TX_DMA_SIZE;
170 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
171 SP_PB_FIFO_ADDR_OFFSET;
172 reg_fifo_addr = mmACP_I2S_TX_FIFOADDR;
173 reg_fifo_size = mmACP_I2S_TX_FIFOSIZE;
174 rv_writel(I2S_SP_TX_MEM_WINDOW_START,
175 rtd->acp3x_base + mmACP_I2S_TX_RINGBUFADDR);
176 }
177 } else {
178 switch (rtd->i2s_instance) {
179 case I2S_BT_INSTANCE:
180 reg_dma_size = mmACP_BT_RX_DMA_SIZE;
181 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
182 BT_CAPT_FIFO_ADDR_OFFSET;
183 reg_fifo_addr = mmACP_BT_RX_FIFOADDR;
184 reg_fifo_size = mmACP_BT_RX_FIFOSIZE;
185 rv_writel(I2S_BT_RX_MEM_WINDOW_START,
186 rtd->acp3x_base + mmACP_BT_RX_RINGBUFADDR);
187 break;
188
189 case I2S_SP_INSTANCE:
190 default:
191 reg_dma_size = mmACP_I2S_RX_DMA_SIZE;
192 acp_fifo_addr = ACP_SRAM_PTE_OFFSET +
193 SP_CAPT_FIFO_ADDR_OFFSET;
194 reg_fifo_addr = mmACP_I2S_RX_FIFOADDR;
195 reg_fifo_size = mmACP_I2S_RX_FIFOSIZE;
196 rv_writel(I2S_SP_RX_MEM_WINDOW_START,
197 rtd->acp3x_base + mmACP_I2S_RX_RINGBUFADDR);
198 }
199 }
200 rv_writel(DMA_SIZE, rtd->acp3x_base + reg_dma_size);
201 rv_writel(acp_fifo_addr, rtd->acp3x_base + reg_fifo_addr);
202 rv_writel(FIFO_SIZE, rtd->acp3x_base + reg_fifo_size);
203 rv_writel(BIT(I2S_RX_THRESHOLD) | BIT(BT_RX_THRESHOLD)
204 | BIT(I2S_TX_THRESHOLD) | BIT(BT_TX_THRESHOLD),
205 rtd->acp3x_base + mmACP_EXTERNAL_INTR_CNTL);
206 }
207
208 static int acp3x_dma_open(struct snd_soc_component *component,
209 struct snd_pcm_substream *substream)
210 {
211 struct snd_pcm_runtime *runtime;
212 struct snd_soc_pcm_runtime *prtd;
213 struct i2s_dev_data *adata;
214 struct i2s_stream_instance *i2s_data;
215 int ret;
216
217 runtime = substream->runtime;
218 prtd = snd_soc_substream_to_rtd(substream);
219 component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
220 adata = dev_get_drvdata(component->dev);
221 i2s_data = kzalloc(sizeof(*i2s_data), GFP_KERNEL);
222 if (!i2s_data)
223 return -EINVAL;
224
225 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
226 runtime->hw = acp3x_pcm_hardware_playback;
227 else
228 runtime->hw = acp3x_pcm_hardware_capture;
229
230 ret = snd_pcm_hw_constraint_integer(runtime,
231 SNDRV_PCM_HW_PARAM_PERIODS);
232 if (ret < 0) {
233 dev_err(component->dev, "set integer constraint failed\n");
234 kfree(i2s_data);
235 return ret;
236 }
237
238 i2s_data->acp3x_base = adata->acp3x_base;
239 runtime->private_data = i2s_data;
240 return ret;
241 }
242
243
244 static int acp3x_dma_hw_params(struct snd_soc_component *component,
245 struct snd_pcm_substream *substream,
246 struct snd_pcm_hw_params *params)
247 {
248 struct i2s_stream_instance *rtd;
249 struct snd_soc_pcm_runtime *prtd;
250 struct snd_soc_card *card;
251 struct acp3x_platform_info *pinfo;
252 struct i2s_dev_data *adata;
253 u64 size;
254
255 prtd = snd_soc_substream_to_rtd(substream);
256 card = prtd->card;
257 pinfo = snd_soc_card_get_drvdata(card);
258 adata = dev_get_drvdata(component->dev);
259 rtd = substream->runtime->private_data;
260 if (!rtd)
261 return -EINVAL;
262
263 if (pinfo) {
264 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
265 rtd->i2s_instance = pinfo->play_i2s_instance;
266 switch (rtd->i2s_instance) {
267 case I2S_BT_INSTANCE:
268 adata->play_stream = substream;
269 break;
270 case I2S_SP_INSTANCE:
271 default:
272 adata->i2ssp_play_stream = substream;
273 }
274 } else {
275 rtd->i2s_instance = pinfo->cap_i2s_instance;
276 switch (rtd->i2s_instance) {
277 case I2S_BT_INSTANCE:
278 adata->capture_stream = substream;
279 break;
280 case I2S_SP_INSTANCE:
281 default:
282 adata->i2ssp_capture_stream = substream;
283 }
284 }
285 } else {
286 pr_err("pinfo failed\n");
287 }
288 size = params_buffer_bytes(params);
289 rtd->dma_addr = substream->runtime->dma_addr;
290 rtd->num_pages = (PAGE_ALIGN(size) >> PAGE_SHIFT);
291 config_acp3x_dma(rtd, substream->stream);
292 return 0;
293 }
294
295 static snd_pcm_uframes_t acp3x_dma_pointer(struct snd_soc_component *component,
296 struct snd_pcm_substream *substream)
297 {
298 struct i2s_stream_instance *rtd;
299 u32 pos;
300 u32 buffersize;
301 u64 bytescount;
302
303 rtd = substream->runtime->private_data;
304
305 buffersize = frames_to_bytes(substream->runtime,
306 substream->runtime->buffer_size);
307 bytescount = acp_get_byte_count(rtd, substream->stream);
308 if (bytescount > rtd->bytescount)
309 bytescount -= rtd->bytescount;
310 pos = do_div(bytescount, buffersize);
311 return bytes_to_frames(substream->runtime, pos);
312 }
313
314 static int acp3x_dma_new(struct snd_soc_component *component,
315 struct snd_soc_pcm_runtime *rtd)
316 {
317 struct device *parent = component->dev->parent;
318 snd_pcm_set_managed_buffer_all(rtd->pcm, SNDRV_DMA_TYPE_DEV,
319 parent, MIN_BUFFER, MAX_BUFFER);
320 return 0;
321 }
322
323 static int acp3x_dma_close(struct snd_soc_component *component,
324 struct snd_pcm_substream *substream)
325 {
326 struct snd_soc_pcm_runtime *prtd;
327 struct i2s_dev_data *adata;
328 struct i2s_stream_instance *ins;
329
330 prtd = snd_soc_substream_to_rtd(substream);
331 component = snd_soc_rtdcom_lookup(prtd, DRV_NAME);
332 adata = dev_get_drvdata(component->dev);
333 ins = substream->runtime->private_data;
334 if (!ins)
335 return -EINVAL;
336
337 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
338 switch (ins->i2s_instance) {
339 case I2S_BT_INSTANCE:
340 adata->play_stream = NULL;
341 break;
342 case I2S_SP_INSTANCE:
343 default:
344 adata->i2ssp_play_stream = NULL;
345 }
346 } else {
347 switch (ins->i2s_instance) {
348 case I2S_BT_INSTANCE:
349 adata->capture_stream = NULL;
350 break;
351 case I2S_SP_INSTANCE:
352 default:
353 adata->i2ssp_capture_stream = NULL;
354 }
355 }
356
357 return 0;
358 }
359
360 static const struct snd_soc_component_driver acp3x_i2s_component = {
361 .name = DRV_NAME,
362 .open = acp3x_dma_open,
363 .close = acp3x_dma_close,
364 .hw_params = acp3x_dma_hw_params,
365 .pointer = acp3x_dma_pointer,
366 .pcm_construct = acp3x_dma_new,
367 };
368
369 static int acp3x_audio_probe(struct platform_device *pdev)
370 {
371 struct resource *res;
372 struct i2s_dev_data *adata;
373 unsigned int irqflags;
374 int status;
375
376 if (!pdev->dev.platform_data) {
377 dev_err(&pdev->dev, "platform_data not retrieved\n");
378 return -ENODEV;
379 }
380 irqflags = *((unsigned int *)(pdev->dev.platform_data));
381
382 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
383 if (!res) {
384 dev_err(&pdev->dev, "IORESOURCE_MEM FAILED\n");
385 return -ENODEV;
386 }
387
388 adata = devm_kzalloc(&pdev->dev, sizeof(*adata), GFP_KERNEL);
389 if (!adata)
390 return -ENOMEM;
391
392 adata->acp3x_base = devm_ioremap(&pdev->dev, res->start,
393 resource_size(res));
394 if (!adata->acp3x_base)
395 return -ENOMEM;
396
397 status = platform_get_irq(pdev, 0);
398 if (status < 0)
399 return status;
400 adata->i2s_irq = status;
401
402 dev_set_drvdata(&pdev->dev, adata);
403 status = devm_snd_soc_register_component(&pdev->dev,
404 &acp3x_i2s_component,
405 NULL, 0);
406 if (status) {
407 dev_err(&pdev->dev, "Fail to register acp i2s component\n");
408 return -ENODEV;
409 }
410 status = devm_request_irq(&pdev->dev, adata->i2s_irq, i2s_irq_handler,
411 irqflags, "ACP3x_I2S_IRQ", adata);
412 if (status) {
413 dev_err(&pdev->dev, "ACP3x I2S IRQ request failed\n");
414 return -ENODEV;
415 }
416
417 pm_runtime_set_autosuspend_delay(&pdev->dev, 2000);
418 pm_runtime_use_autosuspend(&pdev->dev);
419 pm_runtime_mark_last_busy(&pdev->dev);
420 pm_runtime_set_active(&pdev->dev);
421 pm_runtime_enable(&pdev->dev);
422 return 0;
423 }
424
425 static void acp3x_audio_remove(struct platform_device *pdev)
426 {
427 pm_runtime_disable(&pdev->dev);
428 }
429
430 static int acp3x_resume(struct device *dev)
431 {
432 struct i2s_dev_data *adata;
433 u32 val, reg_val, frmt_val;
434
435 reg_val = 0;
436 frmt_val = 0;
437 adata = dev_get_drvdata(dev);
438
439 if (adata->play_stream && adata->play_stream->runtime) {
440 struct i2s_stream_instance *rtd =
441 adata->play_stream->runtime->private_data;
442 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_PLAYBACK);
443 switch (rtd->i2s_instance) {
444 case I2S_BT_INSTANCE:
445 reg_val = mmACP_BTTDM_ITER;
446 frmt_val = mmACP_BTTDM_TXFRMT;
447 break;
448 case I2S_SP_INSTANCE:
449 default:
450 reg_val = mmACP_I2STDM_ITER;
451 frmt_val = mmACP_I2STDM_TXFRMT;
452 }
453 rv_writel((rtd->xfer_resolution << 3),
454 rtd->acp3x_base + reg_val);
455 }
456 if (adata->capture_stream && adata->capture_stream->runtime) {
457 struct i2s_stream_instance *rtd =
458 adata->capture_stream->runtime->private_data;
459 config_acp3x_dma(rtd, SNDRV_PCM_STREAM_CAPTURE);
460 switch (rtd->i2s_instance) {
461 case I2S_BT_INSTANCE:
462 reg_val = mmACP_BTTDM_IRER;
463 frmt_val = mmACP_BTTDM_RXFRMT;
464 break;
465 case I2S_SP_INSTANCE:
466 default:
467 reg_val = mmACP_I2STDM_IRER;
468 frmt_val = mmACP_I2STDM_RXFRMT;
469 }
470 rv_writel((rtd->xfer_resolution << 3),
471 rtd->acp3x_base + reg_val);
472 }
473 if (adata->tdm_mode == TDM_ENABLE) {
474 rv_writel(adata->tdm_fmt, adata->acp3x_base + frmt_val);
475 val = rv_readl(adata->acp3x_base + reg_val);
476 rv_writel(val | 0x2, adata->acp3x_base + reg_val);
477 }
478 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
479 return 0;
480 }
481
482
483 static int acp3x_pcm_runtime_suspend(struct device *dev)
484 {
485 struct i2s_dev_data *adata;
486
487 adata = dev_get_drvdata(dev);
488
489 rv_writel(0, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
490
491 return 0;
492 }
493
494 static int acp3x_pcm_runtime_resume(struct device *dev)
495 {
496 struct i2s_dev_data *adata;
497
498 adata = dev_get_drvdata(dev);
499
500 rv_writel(1, adata->acp3x_base + mmACP_EXTERNAL_INTR_ENB);
501 return 0;
502 }
503
504 static const struct dev_pm_ops acp3x_pm_ops = {
505 .runtime_suspend = acp3x_pcm_runtime_suspend,
506 .runtime_resume = acp3x_pcm_runtime_resume,
507 .resume = acp3x_resume,
508 };
509
510 static struct platform_driver acp3x_dma_driver = {
511 .probe = acp3x_audio_probe,
512 .remove_new = acp3x_audio_remove,
513 .driver = {
514 .name = "acp3x_rv_i2s_dma",
515 .pm = &acp3x_pm_ops,
516 },
517 };
518
519 module_platform_driver(acp3x_dma_driver);
520
521 MODULE_AUTHOR("Vishnuvardhanrao.Ravulapati@amd.com");
522 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
523 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
524 MODULE_DESCRIPTION("AMD ACP 3.x PCM Driver");
525 MODULE_LICENSE("GPL v2");
526 MODULE_ALIAS("platform:"DRV_NAME);
527
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