1 /*
2 * AMD ALSA SoC PCM Driver for ACP 2.x
3 *
4 * Copyright 2014-2015 Advanced Micro Devices, Inc.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 */
16 #include <linux/module.h>
17 #include <linux/delay.h>
18 #include <linux/io.h>
19 #include <linux/iopoll.h>
20 #include <linux/sizes.h>
21 #include <linux/pm_runtime.h>
23 #include <sound/soc.h>
24 #include <drm/amd_asic_type.h>
25 #include "acp.h"
27 #define DRV_NAME "acp_audio_dma"
29 #define PLAYBACK_MIN_NUM_PERIODS 2
30 #define PLAYBACK_MAX_NUM_PERIODS 2
31 #define PLAYBACK_MAX_PERIOD_SIZE 16384
32 #define PLAYBACK_MIN_PERIOD_SIZE 1024
33 #define CAPTURE_MIN_NUM_PERIODS 2
34 #define CAPTURE_MAX_NUM_PERIODS 2
35 #define CAPTURE_MAX_PERIOD_SIZE 16384
36 #define CAPTURE_MIN_PERIOD_SIZE 1024
38 #define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
39 #define MIN_BUFFER MAX_BUFFER
41 #define ST_PLAYBACK_MAX_PERIOD_SIZE 4096
42 #define ST_CAPTURE_MAX_PERIOD_SIZE ST_PLAYBACK_MAX_PERIOD_SIZE
43 #define ST_MAX_BUFFER (ST_PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
44 #define ST_MIN_BUFFER ST_MAX_BUFFER
46 #define DRV_NAME "acp_audio_dma"
47 bool bt_uart_enable = true;
48 EXPORT_SYMBOL(bt_uart_enable);
50 static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
51 .info = SNDRV_PCM_INFO_INTERLEAVED |
52 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
53 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
54 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
55 .formats = SNDRV_PCM_FMTBIT_S16_LE |
56 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
57 .channels_min = 1,
58 .channels_max = 8,
59 .rates = SNDRV_PCM_RATE_8000_96000,
60 .rate_min = 8000,
61 .rate_max = 96000,
62 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
63 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
64 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
65 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
66 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
67 };
69 static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
70 .info = SNDRV_PCM_INFO_INTERLEAVED |
71 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
72 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
73 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
74 .formats = SNDRV_PCM_FMTBIT_S16_LE |
75 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
76 .channels_min = 1,
77 .channels_max = 2,
78 .rates = SNDRV_PCM_RATE_8000_48000,
79 .rate_min = 8000,
80 .rate_max = 48000,
81 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
82 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
83 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
84 .periods_min = CAPTURE_MIN_NUM_PERIODS,
85 .periods_max = CAPTURE_MAX_NUM_PERIODS,
86 };
88 static const struct snd_pcm_hardware acp_st_pcm_hardware_playback = {
89 .info = SNDRV_PCM_INFO_INTERLEAVED |
90 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
91 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
92 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
93 .formats = SNDRV_PCM_FMTBIT_S16_LE |
94 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
95 .channels_min = 1,
96 .channels_max = 8,
97 .rates = SNDRV_PCM_RATE_8000_96000,
98 .rate_min = 8000,
99 .rate_max = 96000,
100 .buffer_bytes_max = ST_MAX_BUFFER,
101 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
102 .period_bytes_max = ST_PLAYBACK_MAX_PERIOD_SIZE,
103 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
104 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
105 };
107 static const struct snd_pcm_hardware acp_st_pcm_hardware_capture = {
108 .info = SNDRV_PCM_INFO_INTERLEAVED |
109 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
110 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
111 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
112 .formats = SNDRV_PCM_FMTBIT_S16_LE |
113 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
114 .channels_min = 1,
115 .channels_max = 2,
116 .rates = SNDRV_PCM_RATE_8000_48000,
117 .rate_min = 8000,
118 .rate_max = 48000,
119 .buffer_bytes_max = ST_MAX_BUFFER,
120 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
121 .period_bytes_max = ST_CAPTURE_MAX_PERIOD_SIZE,
122 .periods_min = CAPTURE_MIN_NUM_PERIODS,
123 .periods_max = CAPTURE_MAX_NUM_PERIODS,
124 };
126 static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg)
127 {
128 return readl(acp_mmio + (reg * 4));
129 }
131 static void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg)
132 {
133 writel(val, acp_mmio + (reg * 4));
134 }
136 /*
137 * Configure a given dma channel parameters - enable/disable,
138 * number of descriptors, priority
139 */
140 static void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
141 u16 dscr_strt_idx, u16 num_dscrs,
142 enum acp_dma_priority_level priority_level)
143 {
144 u32 dma_ctrl;
146 /* disable the channel run field */
147 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
148 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
149 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
151 /* program a DMA channel with first descriptor to be processed. */
152 acp_reg_write((ACP_DMA_DSCR_STRT_IDX_0__DMAChDscrStrtIdx_MASK
153 & dscr_strt_idx),
154 acp_mmio, mmACP_DMA_DSCR_STRT_IDX_0 + ch_num);
156 /*
157 * program a DMA channel with the number of descriptors to be
158 * processed in the transfer
159 */
160 acp_reg_write(ACP_DMA_DSCR_CNT_0__DMAChDscrCnt_MASK & num_dscrs,
161 acp_mmio, mmACP_DMA_DSCR_CNT_0 + ch_num);
163 /* set DMA channel priority */
164 acp_reg_write(priority_level, acp_mmio, mmACP_DMA_PRIO_0 + ch_num);
165 }
167 /* Initialize a dma descriptor in SRAM based on descritor information passed */
168 static void config_dma_descriptor_in_sram(void __iomem *acp_mmio,
169 u16 descr_idx,
170 acp_dma_dscr_transfer_t *descr_info)
171 {
172 u32 sram_offset;
174 sram_offset = (descr_idx * sizeof(acp_dma_dscr_transfer_t));
176 /* program the source base address. */
177 acp_reg_write(sram_offset, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
178 acp_reg_write(descr_info->src, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
179 /* program the destination base address. */
180 acp_reg_write(sram_offset + 4, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
181 acp_reg_write(descr_info->dest, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
183 /* program the number of bytes to be transferred for this descriptor. */
184 acp_reg_write(sram_offset + 8, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
185 acp_reg_write(descr_info->xfer_val, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
186 }
188 static void pre_config_reset(void __iomem *acp_mmio, u16 ch_num)
189 {
190 u32 dma_ctrl;
191 int ret;
193 /* clear the reset bit */
194 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
195 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
196 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
197 /* check the reset bit before programming configuration registers */
198 ret = readl_poll_timeout(acp_mmio + ((mmACP_DMA_CNTL_0 + ch_num) * 4),
199 dma_ctrl,
200 !(dma_ctrl & ACP_DMA_CNTL_0__DMAChRst_MASK),
201 100, ACP_DMA_RESET_TIME);
202 if (ret < 0)
203 pr_err("Failed to clear reset of channel : %d\n", ch_num);
204 }
206 /*
207 * Initialize the DMA descriptor information for transfer between
208 * system memory <-> ACP SRAM
209 */
210 static void set_acp_sysmem_dma_descriptors(void __iomem *acp_mmio,
211 u32 size, int direction,
212 u32 pte_offset, u16 ch,
213 u32 sram_bank, u16 dma_dscr_idx,
214 u32 asic_type)
215 {
216 u16 i;
217 acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL];
219 for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) {
220 dmadscr[i].xfer_val = 0;
221 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
222 dma_dscr_idx = dma_dscr_idx + i;
223 dmadscr[i].dest = sram_bank + (i * (size / 2));
224 dmadscr[i].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS
225 + (pte_offset * SZ_4K) + (i * (size / 2));
226 switch (asic_type) {
227 case CHIP_STONEY:
228 dmadscr[i].xfer_val |=
229 (ACP_DMA_ATTR_DAGB_GARLIC_TO_SHAREDMEM << 16) |
230 (size / 2);
231 break;
232 default:
233 dmadscr[i].xfer_val |=
234 (ACP_DMA_ATTR_DAGB_ONION_TO_SHAREDMEM << 16) |
235 (size / 2);
236 }
237 } else {
238 dma_dscr_idx = dma_dscr_idx + i;
239 dmadscr[i].src = sram_bank + (i * (size / 2));
240 dmadscr[i].dest =
241 ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
242 (pte_offset * SZ_4K) + (i * (size / 2));
243 switch (asic_type) {
244 case CHIP_STONEY:
245 dmadscr[i].xfer_val |=
246 (ACP_DMA_ATTR_SHARED_MEM_TO_DAGB_GARLIC << 16) |
247 (size / 2);
248 break;
249 default:
250 dmadscr[i].xfer_val |=
251 (ACP_DMA_ATTR_SHAREDMEM_TO_DAGB_ONION << 16) |
252 (size / 2);
253 }
254 }
255 config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx,
256 &dmadscr[i]);
257 }
258 pre_config_reset(acp_mmio, ch);
259 config_acp_dma_channel(acp_mmio, ch,
260 dma_dscr_idx - 1,
261 NUM_DSCRS_PER_CHANNEL,
262 ACP_DMA_PRIORITY_LEVEL_NORMAL);
263 }
265 /*
266 * Initialize the DMA descriptor information for transfer between
267 * ACP SRAM <-> I2S
268 */
269 static void set_acp_to_i2s_dma_descriptors(void __iomem *acp_mmio, u32 size,
270 int direction, u32 sram_bank,
271 u16 destination, u16 ch,
272 u16 dma_dscr_idx, u32 asic_type)
273 {
274 u16 i;
275 acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL];
277 for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) {
278 dmadscr[i].xfer_val = 0;
279 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
280 dma_dscr_idx = dma_dscr_idx + i;
281 dmadscr[i].src = sram_bank + (i * (size / 2));
282 /* dmadscr[i].dest is unused by hardware. */
283 dmadscr[i].dest = 0;
284 dmadscr[i].xfer_val |= BIT(22) | (destination << 16) |
285 (size / 2);
286 } else {
287 dma_dscr_idx = dma_dscr_idx + i;
288 /* dmadscr[i].src is unused by hardware. */
289 dmadscr[i].src = 0;
290 dmadscr[i].dest =
291 sram_bank + (i * (size / 2));
292 dmadscr[i].xfer_val |= BIT(22) |
293 (destination << 16) | (size / 2);
294 }
295 config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx,
296 &dmadscr[i]);
297 }
298 pre_config_reset(acp_mmio, ch);
299 /* Configure the DMA channel with the above descriptore */
300 config_acp_dma_channel(acp_mmio, ch, dma_dscr_idx - 1,
301 NUM_DSCRS_PER_CHANNEL,
302 ACP_DMA_PRIORITY_LEVEL_NORMAL);
303 }
305 /* Create page table entries in ACP SRAM for the allocated memory */
306 static void acp_pte_config(void __iomem *acp_mmio, struct page *pg,
307 u16 num_of_pages, u32 pte_offset)
308 {
309 u16 page_idx;
310 u64 addr;
311 u32 low;
312 u32 high;
313 u32 offset;
315 offset = ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET + (pte_offset * 8);
316 for (page_idx = 0; page_idx < (num_of_pages); page_idx++) {
317 /* Load the low address of page int ACP SRAM through SRBM */
318 acp_reg_write((offset + (page_idx * 8)),
319 acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
320 addr = page_to_phys(pg);
322 low = lower_32_bits(addr);
323 high = upper_32_bits(addr);
325 acp_reg_write(low, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
327 /* Load the High address of page int ACP SRAM through SRBM */
328 acp_reg_write((offset + (page_idx * 8) + 4),
329 acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
331 /* page enable in ACP */
332 high |= BIT(31);
333 acp_reg_write(high, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
335 /* Move to next physically contiguos page */
336 pg++;
337 }
338 }
340 static void config_acp_dma(void __iomem *acp_mmio,
341 struct audio_substream_data *rtd,
342 u32 asic_type)
343 {
344 u16 ch_acp_sysmem, ch_acp_i2s;
346 acp_pte_config(acp_mmio, rtd->pg, rtd->num_of_pages,
347 rtd->pte_offset);
349 if (rtd->direction == SNDRV_PCM_STREAM_PLAYBACK) {
350 ch_acp_sysmem = rtd->ch1;
351 ch_acp_i2s = rtd->ch2;
352 } else {
353 ch_acp_i2s = rtd->ch1;
354 ch_acp_sysmem = rtd->ch2;
355 }
356 /* Configure System memory <-> ACP SRAM DMA descriptors */
357 set_acp_sysmem_dma_descriptors(acp_mmio, rtd->size,
358 rtd->direction, rtd->pte_offset,
359 ch_acp_sysmem, rtd->sram_bank,
360 rtd->dma_dscr_idx_1, asic_type);
361 /* Configure ACP SRAM <-> I2S DMA descriptors */
362 set_acp_to_i2s_dma_descriptors(acp_mmio, rtd->size,
363 rtd->direction, rtd->sram_bank,
364 rtd->destination, ch_acp_i2s,
365 rtd->dma_dscr_idx_2, asic_type);
366 }
368 static void acp_dma_cap_channel_enable(void __iomem *acp_mmio,
369 u16 cap_channel)
370 {
371 u32 val, ch_reg, imr_reg, res_reg;
373 switch (cap_channel) {
374 case CAP_CHANNEL1:
375 ch_reg = mmACP_I2SMICSP_RER1;
376 res_reg = mmACP_I2SMICSP_RCR1;
377 imr_reg = mmACP_I2SMICSP_IMR1;
378 break;
379 case CAP_CHANNEL0:
380 default:
381 ch_reg = mmACP_I2SMICSP_RER0;
382 res_reg = mmACP_I2SMICSP_RCR0;
383 imr_reg = mmACP_I2SMICSP_IMR0;
384 break;
385 }
386 val = acp_reg_read(acp_mmio,
387 mmACP_I2S_16BIT_RESOLUTION_EN);
388 if (val & ACP_I2S_MIC_16BIT_RESOLUTION_EN) {
389 acp_reg_write(0x0, acp_mmio, ch_reg);
390 /* Set 16bit resolution on capture */
391 acp_reg_write(0x2, acp_mmio, res_reg);
392 }
393 val = acp_reg_read(acp_mmio, imr_reg);
394 val &= ~ACP_I2SMICSP_IMR1__I2SMICSP_RXDAM_MASK;
395 val &= ~ACP_I2SMICSP_IMR1__I2SMICSP_RXFOM_MASK;
396 acp_reg_write(val, acp_mmio, imr_reg);
397 acp_reg_write(0x1, acp_mmio, ch_reg);
398 }
400 static void acp_dma_cap_channel_disable(void __iomem *acp_mmio,
401 u16 cap_channel)
402 {
403 u32 val, ch_reg, imr_reg;
405 switch (cap_channel) {
406 case CAP_CHANNEL1:
407 imr_reg = mmACP_I2SMICSP_IMR1;
408 ch_reg = mmACP_I2SMICSP_RER1;
409 break;
410 case CAP_CHANNEL0:
411 default:
412 imr_reg = mmACP_I2SMICSP_IMR0;
413 ch_reg = mmACP_I2SMICSP_RER0;
414 break;
415 }
416 val = acp_reg_read(acp_mmio, imr_reg);
417 val |= ACP_I2SMICSP_IMR1__I2SMICSP_RXDAM_MASK;
418 val |= ACP_I2SMICSP_IMR1__I2SMICSP_RXFOM_MASK;
419 acp_reg_write(val, acp_mmio, imr_reg);
420 acp_reg_write(0x0, acp_mmio, ch_reg);
421 }
423 /* Start a given DMA channel transfer */
424 static void acp_dma_start(void __iomem *acp_mmio, u16 ch_num, bool is_circular)
425 {
426 u32 dma_ctrl;
428 /* read the dma control register and disable the channel run field */
429 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
431 /* Invalidating the DAGB cache */
432 acp_reg_write(1, acp_mmio, mmACP_DAGB_ATU_CTRL);
434 /*
435 * configure the DMA channel and start the DMA transfer
436 * set dmachrun bit to start the transfer and enable the
437 * interrupt on completion of the dma transfer
438 */
439 dma_ctrl |= ACP_DMA_CNTL_0__DMAChRun_MASK;
441 switch (ch_num) {
442 case ACP_TO_I2S_DMA_CH_NUM:
443 case I2S_TO_ACP_DMA_CH_NUM:
444 case ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM:
445 case I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM:
446 dma_ctrl |= ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
447 break;
448 default:
449 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
450 break;
451 }
453 /* enable for ACP to SRAM DMA channel */
454 if (is_circular == true)
455 dma_ctrl |= ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
456 else
457 dma_ctrl &= ~ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
459 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
460 }
462 /* Stop a given DMA channel transfer */
463 static int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
464 {
465 u32 dma_ctrl;
466 u32 dma_ch_sts;
467 u32 count = ACP_DMA_RESET_TIME;
469 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
471 /*
472 * clear the dma control register fields before writing zero
473 * in reset bit
474 */
475 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
476 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
478 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
479 dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
481 if (dma_ch_sts & BIT(ch_num)) {
482 /*
483 * set the reset bit for this channel to stop the dma
484 * transfer
485 */
486 dma_ctrl |= ACP_DMA_CNTL_0__DMAChRst_MASK;
487 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
488 }
490 /* check the channel status bit for some time and return the status */
491 while (true) {
492 dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
493 if (!(dma_ch_sts & BIT(ch_num))) {
494 /*
495 * clear the reset flag after successfully stopping
496 * the dma transfer and break from the loop
497 */
498 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
500 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0
501 + ch_num);
502 break;
503 }
504 if (--count == 0) {
505 pr_err("Failed to stop ACP DMA channel : %d\n", ch_num);
506 return -ETIMEDOUT;
507 }
508 udelay(100);
509 }
510 return 0;
511 }
513 static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank,
514 bool power_on)
515 {
516 u32 val, req_reg, sts_reg, sts_reg_mask;
517 u32 loops = 1000;
519 if (bank < 32) {
520 req_reg = mmACP_MEM_SHUT_DOWN_REQ_LO;
521 sts_reg = mmACP_MEM_SHUT_DOWN_STS_LO;
522 sts_reg_mask = 0xFFFFFFFF;
524 } else {
525 bank -= 32;
526 req_reg = mmACP_MEM_SHUT_DOWN_REQ_HI;
527 sts_reg = mmACP_MEM_SHUT_DOWN_STS_HI;
528 sts_reg_mask = 0x0000FFFF;
529 }
531 val = acp_reg_read(acp_mmio, req_reg);
532 if (val & (1 << bank)) {
533 /* bank is in off state */
534 if (power_on == true)
535 /* request to on */
536 val &= ~(1 << bank);
537 else
538 /* request to off */
539 return;
540 } else {
541 /* bank is in on state */
542 if (power_on == false)
543 /* request to off */
544 val |= 1 << bank;
545 else
546 /* request to on */
547 return;
548 }
549 acp_reg_write(val, acp_mmio, req_reg);
551 while (acp_reg_read(acp_mmio, sts_reg) != sts_reg_mask) {
552 if (!loops--) {
553 pr_err("ACP SRAM bank %d state change failed\n", bank);
554 break;
555 }
556 cpu_relax();
557 }
558 }
560 /* Initialize and bring ACP hardware to default state. */
561 static int acp_init(void __iomem *acp_mmio, u32 asic_type)
562 {
563 u16 bank;
564 u32 val, count, sram_pte_offset;
566 /* Assert Soft reset of ACP */
567 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
569 val |= ACP_SOFT_RESET__SoftResetAud_MASK;
570 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
572 count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
573 while (true) {
574 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
575 if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
576 (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
577 break;
578 if (--count == 0) {
579 pr_err("Failed to reset ACP\n");
580 return -ETIMEDOUT;
581 }
582 udelay(100);
583 }
585 /* Enable clock to ACP and wait until the clock is enabled */
586 val = acp_reg_read(acp_mmio, mmACP_CONTROL);
587 val = val | ACP_CONTROL__ClkEn_MASK;
588 acp_reg_write(val, acp_mmio, mmACP_CONTROL);
590 count = ACP_CLOCK_EN_TIME_OUT_VALUE;
592 while (true) {
593 val = acp_reg_read(acp_mmio, mmACP_STATUS);
594 if (val & (u32)0x1)
595 break;
596 if (--count == 0) {
597 pr_err("Failed to reset ACP\n");
598 return -ETIMEDOUT;
599 }
600 udelay(100);
601 }
603 /* Deassert the SOFT RESET flags */
604 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
605 val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
606 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
608 /* For BT instance change pins from UART to BT */
609 if (!bt_uart_enable) {
610 val = acp_reg_read(acp_mmio, mmACP_BT_UART_PAD_SEL);
611 val |= ACP_BT_UART_PAD_SELECT_MASK;
612 acp_reg_write(val, acp_mmio, mmACP_BT_UART_PAD_SEL);
613 }
615 /* initiailize Onion control DAGB register */
616 acp_reg_write(ACP_ONION_CNTL_DEFAULT, acp_mmio,
617 mmACP_AXI2DAGB_ONION_CNTL);
619 /* initiailize Garlic control DAGB registers */
620 acp_reg_write(ACP_GARLIC_CNTL_DEFAULT, acp_mmio,
621 mmACP_AXI2DAGB_GARLIC_CNTL);
623 sram_pte_offset = ACP_DAGB_GRP_SRAM_BASE_ADDRESS |
624 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBSnoopSel_MASK |
625 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBTargetMemSel_MASK |
626 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBGrpEnable_MASK;
627 acp_reg_write(sram_pte_offset, acp_mmio, mmACP_DAGB_BASE_ADDR_GRP_1);
628 acp_reg_write(ACP_PAGE_SIZE_4K_ENABLE, acp_mmio,
629 mmACP_DAGB_PAGE_SIZE_GRP_1);
631 acp_reg_write(ACP_SRAM_BASE_ADDRESS, acp_mmio,
632 mmACP_DMA_DESC_BASE_ADDR);
634 /* Num of descriptiors in SRAM 0x4, means 256 descriptors;(64 * 4) */
635 acp_reg_write(0x4, acp_mmio, mmACP_DMA_DESC_MAX_NUM_DSCR);
636 acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
637 acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
639 /*
640 * When ACP_TILE_P1 is turned on, all SRAM banks get turned on.
641 * Now, turn off all of them. This can't be done in 'poweron' of
642 * ACP pm domain, as this requires ACP to be initialized.
643 * For Stoney, Memory gating is disabled,i.e SRAM Banks
644 * won't be turned off. The default state for SRAM banks is ON.
645 * Setting SRAM bank state code skipped for STONEY platform.
646 */
647 if (asic_type != CHIP_STONEY) {
648 for (bank = 1; bank < 48; bank++)
649 acp_set_sram_bank_state(acp_mmio, bank, false);
650 }
651 return 0;
652 }
654 /* Deinitialize ACP */
655 static int acp_deinit(void __iomem *acp_mmio)
656 {
657 u32 val;
658 u32 count;
660 /* Assert Soft reset of ACP */
661 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
663 val |= ACP_SOFT_RESET__SoftResetAud_MASK;
664 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
666 count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
667 while (true) {
668 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
669 if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
670 (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
671 break;
672 if (--count == 0) {
673 pr_err("Failed to reset ACP\n");
674 return -ETIMEDOUT;
675 }
676 udelay(100);
677 }
678 /* Disable ACP clock */
679 val = acp_reg_read(acp_mmio, mmACP_CONTROL);
680 val &= ~ACP_CONTROL__ClkEn_MASK;
681 acp_reg_write(val, acp_mmio, mmACP_CONTROL);
683 count = ACP_CLOCK_EN_TIME_OUT_VALUE;
685 while (true) {
686 val = acp_reg_read(acp_mmio, mmACP_STATUS);
687 if (!(val & (u32)0x1))
688 break;
689 if (--count == 0) {
690 pr_err("Failed to reset ACP\n");
691 return -ETIMEDOUT;
692 }
693 udelay(100);
694 }
695 return 0;
696 }
698 /* ACP DMA irq handler routine for playback, capture usecases */
699 static irqreturn_t dma_irq_handler(int irq, void *arg)
700 {
701 u16 dscr_idx;
702 u32 intr_flag, ext_intr_status;
703 struct audio_drv_data *irq_data;
704 void __iomem *acp_mmio;
705 struct device *dev = arg;
706 bool valid_irq = false;
708 irq_data = dev_get_drvdata(dev);
709 acp_mmio = irq_data->acp_mmio;
711 ext_intr_status = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
712 intr_flag = (((ext_intr_status &
713 ACP_EXTERNAL_INTR_STAT__DMAIOCStat_MASK) >>
714 ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT));
716 if ((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) != 0) {
717 valid_irq = true;
718 snd_pcm_period_elapsed(irq_data->play_i2ssp_stream);
719 acp_reg_write((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) << 16,
720 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
721 }
723 if ((intr_flag & BIT(ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM)) != 0) {
724 valid_irq = true;
725 snd_pcm_period_elapsed(irq_data->play_i2sbt_stream);
726 acp_reg_write((intr_flag &
727 BIT(ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM)) << 16,
728 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
729 }
731 if ((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) != 0) {
732 valid_irq = true;
733 if (acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_14) ==
734 CAPTURE_START_DMA_DESCR_CH15)
735 dscr_idx = CAPTURE_END_DMA_DESCR_CH14;
736 else
737 dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
738 config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM, dscr_idx,
739 1, 0);
740 acp_dma_start(acp_mmio, ACP_TO_SYSRAM_CH_NUM, false);
742 snd_pcm_period_elapsed(irq_data->capture_i2ssp_stream);
743 acp_reg_write((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) << 16,
744 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
745 }
747 if ((intr_flag & BIT(I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM)) != 0) {
748 valid_irq = true;
749 if (acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_10) ==
750 CAPTURE_START_DMA_DESCR_CH11)
751 dscr_idx = CAPTURE_END_DMA_DESCR_CH10;
752 else
753 dscr_idx = CAPTURE_START_DMA_DESCR_CH10;
754 config_acp_dma_channel(acp_mmio,
755 ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
756 dscr_idx, 1, 0);
757 acp_dma_start(acp_mmio, ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
758 false);
760 snd_pcm_period_elapsed(irq_data->capture_i2sbt_stream);
761 acp_reg_write((intr_flag &
762 BIT(I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM)) << 16,
763 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
764 }
766 if (valid_irq)
767 return IRQ_HANDLED;
768 else
769 return IRQ_NONE;
770 }
772 static int acp_dma_open(struct snd_pcm_substream *substream)
773 {
774 u16 bank;
775 int ret = 0;
776 struct snd_pcm_runtime *runtime = substream->runtime;
777 struct snd_soc_pcm_runtime *prtd = substream->private_data;
778 struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd,
779 DRV_NAME);
780 struct audio_drv_data *intr_data = dev_get_drvdata(component->dev);
781 struct audio_substream_data *adata =
782 kzalloc(sizeof(struct audio_substream_data), GFP_KERNEL);
783 if (!adata)
784 return -ENOMEM;
786 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
787 switch (intr_data->asic_type) {
788 case CHIP_STONEY:
789 runtime->hw = acp_st_pcm_hardware_playback;
790 break;
791 default:
792 runtime->hw = acp_pcm_hardware_playback;
793 }
794 } else {
795 switch (intr_data->asic_type) {
796 case CHIP_STONEY:
797 runtime->hw = acp_st_pcm_hardware_capture;
798 break;
799 default:
800 runtime->hw = acp_pcm_hardware_capture;
801 }
802 }
804 ret = snd_pcm_hw_constraint_integer(runtime,
805 SNDRV_PCM_HW_PARAM_PERIODS);
806 if (ret < 0) {
807 dev_err(component->dev, "set integer constraint failed\n");
808 kfree(adata);
809 return ret;
810 }
812 adata->acp_mmio = intr_data->acp_mmio;
813 runtime->private_data = adata;
815 /*
816 * Enable ACP irq, when neither playback or capture streams are
817 * active by the time when a new stream is being opened.
818 * This enablement is not required for another stream, if current
819 * stream is not closed
820 */
821 if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream &&
822 !intr_data->play_i2sbt_stream && !intr_data->capture_i2sbt_stream)
823 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
825 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
826 /*
827 * For Stoney, Memory gating is disabled,i.e SRAM Banks
828 * won't be turned off. The default state for SRAM banks is ON.
829 * Setting SRAM bank state code skipped for STONEY platform.
830 */
831 if (intr_data->asic_type != CHIP_STONEY) {
832 for (bank = 1; bank <= 4; bank++)
833 acp_set_sram_bank_state(intr_data->acp_mmio,
834 bank, true);
835 }
836 } else {
837 if (intr_data->asic_type != CHIP_STONEY) {
838 for (bank = 5; bank <= 8; bank++)
839 acp_set_sram_bank_state(intr_data->acp_mmio,
840 bank, true);
841 }
842 }
844 return 0;
845 }
847 static int acp_dma_hw_params(struct snd_pcm_substream *substream,
848 struct snd_pcm_hw_params *params)
849 {
850 int status;
851 uint64_t size;
852 u32 val = 0;
853 struct page *pg;
854 struct snd_pcm_runtime *runtime;
855 struct audio_substream_data *rtd;
856 struct snd_soc_pcm_runtime *prtd = substream->private_data;
857 struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd,
858 DRV_NAME);
859 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
860 struct snd_soc_card *card = prtd->card;
861 struct acp_platform_info *pinfo = snd_soc_card_get_drvdata(card);
863 runtime = substream->runtime;
864 rtd = runtime->private_data;
866 if (WARN_ON(!rtd))
867 return -EINVAL;
869 if (pinfo) {
870 rtd->i2s_instance = pinfo->i2s_instance;
871 rtd->capture_channel = pinfo->capture_channel;
872 }
873 if (adata->asic_type == CHIP_STONEY) {
874 val = acp_reg_read(adata->acp_mmio,
875 mmACP_I2S_16BIT_RESOLUTION_EN);
876 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
877 switch (rtd->i2s_instance) {
878 case I2S_BT_INSTANCE:
879 val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
880 break;
881 case I2S_SP_INSTANCE:
882 default:
883 val |= ACP_I2S_SP_16BIT_RESOLUTION_EN;
884 }
885 } else {
886 switch (rtd->i2s_instance) {
887 case I2S_BT_INSTANCE:
888 val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
889 break;
890 case I2S_SP_INSTANCE:
891 default:
892 val |= ACP_I2S_MIC_16BIT_RESOLUTION_EN;
893 }
894 }
895 acp_reg_write(val, adata->acp_mmio,
896 mmACP_I2S_16BIT_RESOLUTION_EN);
897 }
899 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
900 switch (rtd->i2s_instance) {
901 case I2S_BT_INSTANCE:
902 rtd->pte_offset = ACP_ST_BT_PLAYBACK_PTE_OFFSET;
903 rtd->ch1 = SYSRAM_TO_ACP_BT_INSTANCE_CH_NUM;
904 rtd->ch2 = ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM;
905 rtd->sram_bank = ACP_SRAM_BANK_3_ADDRESS;
906 rtd->destination = TO_BLUETOOTH;
907 rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH8;
908 rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH9;
909 rtd->byte_cnt_high_reg_offset =
910 mmACP_I2S_BT_TRANSMIT_BYTE_CNT_HIGH;
911 rtd->byte_cnt_low_reg_offset =
912 mmACP_I2S_BT_TRANSMIT_BYTE_CNT_LOW;
913 adata->play_i2sbt_stream = substream;
914 break;
915 case I2S_SP_INSTANCE:
916 default:
917 switch (adata->asic_type) {
918 case CHIP_STONEY:
919 rtd->pte_offset = ACP_ST_PLAYBACK_PTE_OFFSET;
920 break;
921 default:
922 rtd->pte_offset = ACP_PLAYBACK_PTE_OFFSET;
923 }
924 rtd->ch1 = SYSRAM_TO_ACP_CH_NUM;
925 rtd->ch2 = ACP_TO_I2S_DMA_CH_NUM;
926 rtd->sram_bank = ACP_SRAM_BANK_1_ADDRESS;
927 rtd->destination = TO_ACP_I2S_1;
928 rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH12;
929 rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH13;
930 rtd->byte_cnt_high_reg_offset =
931 mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH;
932 rtd->byte_cnt_low_reg_offset =
933 mmACP_I2S_TRANSMIT_BYTE_CNT_LOW;
934 adata->play_i2ssp_stream = substream;
935 }
936 } else {
937 switch (rtd->i2s_instance) {
938 case I2S_BT_INSTANCE:
939 rtd->pte_offset = ACP_ST_BT_CAPTURE_PTE_OFFSET;
940 rtd->ch1 = I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM;
941 rtd->ch2 = ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM;
942 rtd->sram_bank = ACP_SRAM_BANK_4_ADDRESS;
943 rtd->destination = FROM_BLUETOOTH;
944 rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH10;
945 rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH11;
946 rtd->byte_cnt_high_reg_offset =
947 mmACP_I2S_BT_RECEIVE_BYTE_CNT_HIGH;
948 rtd->byte_cnt_low_reg_offset =
949 mmACP_I2S_BT_RECEIVE_BYTE_CNT_LOW;
950 rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_11;
951 adata->capture_i2sbt_stream = substream;
952 break;
953 case I2S_SP_INSTANCE:
954 default:
955 rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
956 rtd->ch1 = I2S_TO_ACP_DMA_CH_NUM;
957 rtd->ch2 = ACP_TO_SYSRAM_CH_NUM;
958 switch (adata->asic_type) {
959 case CHIP_STONEY:
960 rtd->pte_offset = ACP_ST_CAPTURE_PTE_OFFSET;
961 rtd->sram_bank = ACP_SRAM_BANK_2_ADDRESS;
962 break;
963 default:
964 rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
965 rtd->sram_bank = ACP_SRAM_BANK_5_ADDRESS;
966 }
967 rtd->destination = FROM_ACP_I2S_1;
968 rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH14;
969 rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH15;
970 rtd->byte_cnt_high_reg_offset =
971 mmACP_I2S_RECEIVED_BYTE_CNT_HIGH;
972 rtd->byte_cnt_low_reg_offset =
973 mmACP_I2S_RECEIVED_BYTE_CNT_LOW;
974 rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_15;
975 adata->capture_i2ssp_stream = substream;
976 }
977 }
979 size = params_buffer_bytes(params);
980 status = snd_pcm_lib_malloc_pages(substream, size);
981 if (status < 0)
982 return status;
984 memset(substream->runtime->dma_area, 0, params_buffer_bytes(params));
985 pg = virt_to_page(substream->dma_buffer.area);
987 if (pg) {
988 acp_set_sram_bank_state(rtd->acp_mmio, 0, true);
989 /* Save for runtime private data */
990 rtd->pg = pg;
991 rtd->order = get_order(size);
993 /* Fill the page table entries in ACP SRAM */
994 rtd->pg = pg;
995 rtd->size = size;
996 rtd->num_of_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
997 rtd->direction = substream->stream;
999 config_acp_dma(rtd->acp_mmio, rtd, adata->asic_type);
1000 status = 0;
1001 } else {
1002 status = -ENOMEM;
1003 }
1004 return status;
1005 }
1007 static int acp_dma_hw_free(struct snd_pcm_substream *substream)
1008 {
1009 return snd_pcm_lib_free_pages(substream);
1010 }
1012 static u64 acp_get_byte_count(struct audio_substream_data *rtd)
1013 {
1014 union acp_dma_count byte_count;
1016 byte_count.bcount.high = acp_reg_read(rtd->acp_mmio,
1017 rtd->byte_cnt_high_reg_offset);
1018 byte_count.bcount.low = acp_reg_read(rtd->acp_mmio,
1019 rtd->byte_cnt_low_reg_offset);
1020 return byte_count.bytescount;
1021 }
1023 static snd_pcm_uframes_t acp_dma_pointer(struct snd_pcm_substream *substream)
1024 {
1025 u32 buffersize;
1026 u32 pos = 0;
1027 u64 bytescount = 0;
1028 u16 dscr;
1029 u32 period_bytes, delay;
1031 struct snd_pcm_runtime *runtime = substream->runtime;
1032 struct audio_substream_data *rtd = runtime->private_data;
1034 if (!rtd)
1035 return -EINVAL;
1037 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
1038 period_bytes = frames_to_bytes(runtime, runtime->period_size);
1039 dscr = acp_reg_read(rtd->acp_mmio, rtd->dma_curr_dscr);
1040 if (dscr == rtd->dma_dscr_idx_1)
1041 pos = period_bytes;
1042 else
1043 pos = 0;
1044 bytescount = acp_get_byte_count(rtd);
1045 if (bytescount > rtd->bytescount)
1046 bytescount -= rtd->bytescount;
1047 delay = do_div(bytescount, period_bytes);
1048 runtime->delay = bytes_to_frames(runtime, delay);
1049 } else {
1050 buffersize = frames_to_bytes(runtime, runtime->buffer_size);
1051 bytescount = acp_get_byte_count(rtd);
1052 if (bytescount > rtd->bytescount)
1053 bytescount -= rtd->bytescount;
1054 pos = do_div(bytescount, buffersize);
1055 }
1056 return bytes_to_frames(runtime, pos);
1057 }
1059 static int acp_dma_mmap(struct snd_pcm_substream *substream,
1060 struct vm_area_struct *vma)
1061 {
1062 return snd_pcm_lib_default_mmap(substream, vma);
1063 }
1065 static int acp_dma_prepare(struct snd_pcm_substream *substream)
1066 {
1067 struct snd_pcm_runtime *runtime = substream->runtime;
1068 struct audio_substream_data *rtd = runtime->private_data;
1069 u16 ch_acp_sysmem, ch_acp_i2s;
1071 if (!rtd)
1072 return -EINVAL;
1074 if (rtd->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1075 ch_acp_sysmem = rtd->ch1;
1076 ch_acp_i2s = rtd->ch2;
1077 } else {
1078 ch_acp_i2s = rtd->ch1;
1079 ch_acp_sysmem = rtd->ch2;
1080 }
1081 config_acp_dma_channel(rtd->acp_mmio,
1082 ch_acp_sysmem,
1083 rtd->dma_dscr_idx_1,
1084 NUM_DSCRS_PER_CHANNEL, 0);
1085 config_acp_dma_channel(rtd->acp_mmio,
1086 ch_acp_i2s,
1087 rtd->dma_dscr_idx_2,
1088 NUM_DSCRS_PER_CHANNEL, 0);
1089 return 0;
1090 }
1092 static int acp_dma_trigger(struct snd_pcm_substream *substream, int cmd)
1093 {
1094 int ret;
1096 struct snd_pcm_runtime *runtime = substream->runtime;
1097 struct audio_substream_data *rtd = runtime->private_data;
1099 if (!rtd)
1100 return -EINVAL;
1101 switch (cmd) {
1102 case SNDRV_PCM_TRIGGER_START:
1103 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1104 case SNDRV_PCM_TRIGGER_RESUME:
1105 rtd->bytescount = acp_get_byte_count(rtd);
1106 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
1107 if (rtd->capture_channel == CAP_CHANNEL0) {
1108 acp_dma_cap_channel_disable(rtd->acp_mmio,
1109 CAP_CHANNEL1);
1110 acp_dma_cap_channel_enable(rtd->acp_mmio,
1111 CAP_CHANNEL0);
1112 }
1113 if (rtd->capture_channel == CAP_CHANNEL1) {
1114 acp_dma_cap_channel_disable(rtd->acp_mmio,
1115 CAP_CHANNEL0);
1116 acp_dma_cap_channel_enable(rtd->acp_mmio,
1117 CAP_CHANNEL1);
1118 }
1119 acp_dma_start(rtd->acp_mmio, rtd->ch1, true);
1120 } else {
1121 acp_dma_start(rtd->acp_mmio, rtd->ch1, true);
1122 acp_dma_start(rtd->acp_mmio, rtd->ch2, true);
1123 }
1124 ret = 0;
1125 break;
1126 case SNDRV_PCM_TRIGGER_STOP:
1127 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1128 case SNDRV_PCM_TRIGGER_SUSPEND:
1129 acp_dma_stop(rtd->acp_mmio, rtd->ch2);
1130 ret = acp_dma_stop(rtd->acp_mmio, rtd->ch1);
1131 break;
1132 default:
1133 ret = -EINVAL;
1134 }
1135 return ret;
1136 }
1138 static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
1139 {
1140 int ret;
1141 struct snd_soc_component *component = snd_soc_rtdcom_lookup(rtd,
1142 DRV_NAME);
1143 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
1145 switch (adata->asic_type) {
1146 case CHIP_STONEY:
1147 ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
1148 SNDRV_DMA_TYPE_DEV,
1149 NULL, ST_MIN_BUFFER,
1150 ST_MAX_BUFFER);
1151 break;
1152 default:
1153 ret = snd_pcm_lib_preallocate_pages_for_all(rtd->pcm,
1154 SNDRV_DMA_TYPE_DEV,
1155 NULL, MIN_BUFFER,
1156 MAX_BUFFER);
1157 break;
1158 }
1159 if (ret < 0)
1160 dev_err(component->dev,
1161 "buffer preallocation failure error:%d\n", ret);
1162 return ret;
1163 }
1165 static int acp_dma_close(struct snd_pcm_substream *substream)
1166 {
1167 u16 bank;
1168 struct snd_pcm_runtime *runtime = substream->runtime;
1169 struct audio_substream_data *rtd = runtime->private_data;
1170 struct snd_soc_pcm_runtime *prtd = substream->private_data;
1171 struct snd_soc_component *component = snd_soc_rtdcom_lookup(prtd,
1172 DRV_NAME);
1173 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
1175 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1176 switch (rtd->i2s_instance) {
1177 case I2S_BT_INSTANCE:
1178 adata->play_i2sbt_stream = NULL;
1179 break;
1180 case I2S_SP_INSTANCE:
1181 default:
1182 adata->play_i2ssp_stream = NULL;
1183 /*
1184 * For Stoney, Memory gating is disabled,i.e SRAM Banks
1185 * won't be turned off. The default state for SRAM banks
1186 * is ON.Setting SRAM bank state code skipped for STONEY
1187 * platform. Added condition checks for Carrizo platform
1188 * only.
1189 */
1190 if (adata->asic_type != CHIP_STONEY) {
1191 for (bank = 1; bank <= 4; bank++)
1192 acp_set_sram_bank_state(adata->acp_mmio,
1193 bank, false);
1194 }
1195 }
1196 } else {
1197 switch (rtd->i2s_instance) {
1198 case I2S_BT_INSTANCE:
1199 adata->capture_i2sbt_stream = NULL;
1200 break;
1201 case I2S_SP_INSTANCE:
1202 default:
1203 adata->capture_i2ssp_stream = NULL;
1204 if (adata->asic_type != CHIP_STONEY) {
1205 for (bank = 5; bank <= 8; bank++)
1206 acp_set_sram_bank_state(adata->acp_mmio,
1207 bank, false);
1208 }
1209 }
1210 }
1212 /*
1213 * Disable ACP irq, when the current stream is being closed and
1214 * another stream is also not active.
1215 */
1216 if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream &&
1217 !adata->play_i2sbt_stream && !adata->capture_i2sbt_stream)
1218 acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1219 kfree(rtd);
1220 return 0;
1221 }
1223 static const struct snd_pcm_ops acp_dma_ops = {
1224 .open = acp_dma_open,
1225 .close = acp_dma_close,
1226 .ioctl = snd_pcm_lib_ioctl,
1227 .hw_params = acp_dma_hw_params,
1228 .hw_free = acp_dma_hw_free,
1229 .trigger = acp_dma_trigger,
1230 .pointer = acp_dma_pointer,
1231 .mmap = acp_dma_mmap,
1232 .prepare = acp_dma_prepare,
1233 };
1235 static const struct snd_soc_component_driver acp_asoc_platform = {
1236 .name = DRV_NAME,
1237 .ops = &acp_dma_ops,
1238 .pcm_new = acp_dma_new,
1239 };
1241 static int acp_audio_probe(struct platform_device *pdev)
1242 {
1243 int status;
1244 struct audio_drv_data *audio_drv_data;
1245 struct resource *res;
1246 const u32 *pdata = pdev->dev.platform_data;
1248 if (!pdata) {
1249 dev_err(&pdev->dev, "Missing platform data\n");
1250 return -ENODEV;
1251 }
1253 audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data),
1254 GFP_KERNEL);
1255 if (!audio_drv_data)
1256 return -ENOMEM;
1258 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1259 audio_drv_data->acp_mmio = devm_ioremap_resource(&pdev->dev, res);
1260 if (IS_ERR(audio_drv_data->acp_mmio))
1261 return PTR_ERR(audio_drv_data->acp_mmio);
1263 /*
1264 * The following members gets populated in device 'open'
1265 * function. Till then interrupts are disabled in 'acp_init'
1266 * and device doesn't generate any interrupts.
1267 */
1269 audio_drv_data->play_i2ssp_stream = NULL;
1270 audio_drv_data->capture_i2ssp_stream = NULL;
1271 audio_drv_data->play_i2sbt_stream = NULL;
1272 audio_drv_data->capture_i2sbt_stream = NULL;
1274 audio_drv_data->asic_type = *pdata;
1276 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1277 if (!res) {
1278 dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
1279 return -ENODEV;
1280 }
1282 status = devm_request_irq(&pdev->dev, res->start, dma_irq_handler,
1283 0, "ACP_IRQ", &pdev->dev);
1284 if (status) {
1285 dev_err(&pdev->dev, "ACP IRQ request failed\n");
1286 return status;
1287 }
1289 dev_set_drvdata(&pdev->dev, audio_drv_data);
1291 /* Initialize the ACP */
1292 status = acp_init(audio_drv_data->acp_mmio, audio_drv_data->asic_type);
1293 if (status) {
1294 dev_err(&pdev->dev, "ACP Init failed status:%d\n", status);
1295 return status;
1296 }
1298 status = devm_snd_soc_register_component(&pdev->dev,
1299 &acp_asoc_platform, NULL, 0);
1300 if (status != 0) {
1301 dev_err(&pdev->dev, "Fail to register ALSA platform device\n");
1302 return status;
1303 }
1305 pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
1306 pm_runtime_use_autosuspend(&pdev->dev);
1307 pm_runtime_enable(&pdev->dev);
1309 return status;
1310 }
1312 static int acp_audio_remove(struct platform_device *pdev)
1313 {
1314 int status;
1315 struct audio_drv_data *adata = dev_get_drvdata(&pdev->dev);
1317 status = acp_deinit(adata->acp_mmio);
1318 if (status)
1319 dev_err(&pdev->dev, "ACP Deinit failed status:%d\n", status);
1320 pm_runtime_disable(&pdev->dev);
1322 return 0;
1323 }
1325 static int acp_pcm_resume(struct device *dev)
1326 {
1327 u16 bank;
1328 int status;
1329 struct audio_substream_data *rtd;
1330 struct audio_drv_data *adata = dev_get_drvdata(dev);
1332 status = acp_init(adata->acp_mmio, adata->asic_type);
1333 if (status) {
1334 dev_err(dev, "ACP Init failed status:%d\n", status);
1335 return status;
1336 }
1338 if (adata->play_i2ssp_stream && adata->play_i2ssp_stream->runtime) {
1339 /*
1340 * For Stoney, Memory gating is disabled,i.e SRAM Banks
1341 * won't be turned off. The default state for SRAM banks is ON.
1342 * Setting SRAM bank state code skipped for STONEY platform.
1343 */
1344 if (adata->asic_type != CHIP_STONEY) {
1345 for (bank = 1; bank <= 4; bank++)
1346 acp_set_sram_bank_state(adata->acp_mmio, bank,
1347 true);
1348 }
1349 rtd = adata->play_i2ssp_stream->runtime->private_data;
1350 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1351 }
1352 if (adata->capture_i2ssp_stream &&
1353 adata->capture_i2ssp_stream->runtime) {
1354 if (adata->asic_type != CHIP_STONEY) {
1355 for (bank = 5; bank <= 8; bank++)
1356 acp_set_sram_bank_state(adata->acp_mmio, bank,
1357 true);
1358 }
1359 rtd = adata->capture_i2ssp_stream->runtime->private_data;
1360 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1361 }
1362 if (adata->asic_type != CHIP_CARRIZO) {
1363 if (adata->play_i2sbt_stream &&
1364 adata->play_i2sbt_stream->runtime) {
1365 rtd = adata->play_i2sbt_stream->runtime->private_data;
1366 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1367 }
1368 if (adata->capture_i2sbt_stream &&
1369 adata->capture_i2sbt_stream->runtime) {
1370 rtd = adata->capture_i2sbt_stream->runtime->private_data;
1371 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1372 }
1373 }
1374 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1375 return 0;
1376 }
1378 static int acp_pcm_runtime_suspend(struct device *dev)
1379 {
1380 int status;
1381 struct audio_drv_data *adata = dev_get_drvdata(dev);
1383 status = acp_deinit(adata->acp_mmio);
1384 if (status)
1385 dev_err(dev, "ACP Deinit failed status:%d\n", status);
1386 acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1387 return 0;
1388 }
1390 static int acp_pcm_runtime_resume(struct device *dev)
1391 {
1392 int status;
1393 struct audio_drv_data *adata = dev_get_drvdata(dev);
1395 status = acp_init(adata->acp_mmio, adata->asic_type);
1396 if (status) {
1397 dev_err(dev, "ACP Init failed status:%d\n", status);
1398 return status;
1399 }
1400 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1401 return 0;
1402 }
1404 static const struct dev_pm_ops acp_pm_ops = {
1405 .resume = acp_pcm_resume,
1406 .runtime_suspend = acp_pcm_runtime_suspend,
1407 .runtime_resume = acp_pcm_runtime_resume,
1408 };
1410 static struct platform_driver acp_dma_driver = {
1411 .probe = acp_audio_probe,
1412 .remove = acp_audio_remove,
1413 .driver = {
1414 .name = DRV_NAME,
1415 .pm = &acp_pm_ops,
1416 },
1417 };
1419 module_platform_driver(acp_dma_driver);
1421 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
1422 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
1423 MODULE_DESCRIPTION("AMD ACP PCM Driver");
1424 MODULE_LICENSE("GPL v2");
1425 MODULE_ALIAS("platform:"DRV_NAME);