1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * AMD ALSA SoC PCM Driver for ACP 2.x
4 *
5 * Copyright 2014-2015 Advanced Micro Devices, Inc.
6 */
7
8 #include <linux/module.h>
9 #include <linux/delay.h>
10 #include <linux/io.h>
11 #include <linux/iopoll.h>
12 #include <linux/sizes.h>
13 #include <linux/pm_runtime.h>
14
15 #include <sound/soc.h>
16 #include <drm/amd_asic_type.h>
17 #include "acp.h"
18
19 #define DRV_NAME "acp_audio_dma"
20
21 #define PLAYBACK_MIN_NUM_PERIODS 2
22 #define PLAYBACK_MAX_NUM_PERIODS 2
23 #define PLAYBACK_MAX_PERIOD_SIZE 16384
24 #define PLAYBACK_MIN_PERIOD_SIZE 1024
25 #define CAPTURE_MIN_NUM_PERIODS 2
26 #define CAPTURE_MAX_NUM_PERIODS 2
27 #define CAPTURE_MAX_PERIOD_SIZE 16384
28 #define CAPTURE_MIN_PERIOD_SIZE 1024
29
30 #define MAX_BUFFER (PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
31 #define MIN_BUFFER MAX_BUFFER
32
33 #define ST_PLAYBACK_MAX_PERIOD_SIZE 4096
34 #define ST_CAPTURE_MAX_PERIOD_SIZE ST_PLAYBACK_MAX_PERIOD_SIZE
35 #define ST_MAX_BUFFER (ST_PLAYBACK_MAX_PERIOD_SIZE * PLAYBACK_MAX_NUM_PERIODS)
36 #define ST_MIN_BUFFER ST_MAX_BUFFER
37
38 #define DRV_NAME "acp_audio_dma"
39 bool bt_uart_enable = true;
40 EXPORT_SYMBOL(bt_uart_enable);
41
42 static const struct snd_pcm_hardware acp_pcm_hardware_playback = {
43 .info = SNDRV_PCM_INFO_INTERLEAVED |
44 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
45 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
46 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
47 .formats = SNDRV_PCM_FMTBIT_S16_LE |
48 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
49 .channels_min = 1,
50 .channels_max = 8,
51 .rates = SNDRV_PCM_RATE_8000_96000,
52 .rate_min = 8000,
53 .rate_max = 96000,
54 .buffer_bytes_max = PLAYBACK_MAX_NUM_PERIODS * PLAYBACK_MAX_PERIOD_SIZE,
55 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
56 .period_bytes_max = PLAYBACK_MAX_PERIOD_SIZE,
57 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
58 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
59 };
60
61 static const struct snd_pcm_hardware acp_pcm_hardware_capture = {
62 .info = SNDRV_PCM_INFO_INTERLEAVED |
63 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
64 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
65 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
66 .formats = SNDRV_PCM_FMTBIT_S16_LE |
67 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
68 .channels_min = 1,
69 .channels_max = 2,
70 .rates = SNDRV_PCM_RATE_8000_48000,
71 .rate_min = 8000,
72 .rate_max = 48000,
73 .buffer_bytes_max = CAPTURE_MAX_NUM_PERIODS * CAPTURE_MAX_PERIOD_SIZE,
74 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
75 .period_bytes_max = CAPTURE_MAX_PERIOD_SIZE,
76 .periods_min = CAPTURE_MIN_NUM_PERIODS,
77 .periods_max = CAPTURE_MAX_NUM_PERIODS,
78 };
79
80 static const struct snd_pcm_hardware acp_st_pcm_hardware_playback = {
81 .info = SNDRV_PCM_INFO_INTERLEAVED |
82 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
83 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
84 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
85 .formats = SNDRV_PCM_FMTBIT_S16_LE |
86 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
87 .channels_min = 1,
88 .channels_max = 8,
89 .rates = SNDRV_PCM_RATE_8000_96000,
90 .rate_min = 8000,
91 .rate_max = 96000,
92 .buffer_bytes_max = ST_MAX_BUFFER,
93 .period_bytes_min = PLAYBACK_MIN_PERIOD_SIZE,
94 .period_bytes_max = ST_PLAYBACK_MAX_PERIOD_SIZE,
95 .periods_min = PLAYBACK_MIN_NUM_PERIODS,
96 .periods_max = PLAYBACK_MAX_NUM_PERIODS,
97 };
98
99 static const struct snd_pcm_hardware acp_st_pcm_hardware_capture = {
100 .info = SNDRV_PCM_INFO_INTERLEAVED |
101 SNDRV_PCM_INFO_BLOCK_TRANSFER | SNDRV_PCM_INFO_MMAP |
102 SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BATCH |
103 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME,
104 .formats = SNDRV_PCM_FMTBIT_S16_LE |
105 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE,
106 .channels_min = 1,
107 .channels_max = 2,
108 .rates = SNDRV_PCM_RATE_8000_48000,
109 .rate_min = 8000,
110 .rate_max = 48000,
111 .buffer_bytes_max = ST_MAX_BUFFER,
112 .period_bytes_min = CAPTURE_MIN_PERIOD_SIZE,
113 .period_bytes_max = ST_CAPTURE_MAX_PERIOD_SIZE,
114 .periods_min = CAPTURE_MIN_NUM_PERIODS,
115 .periods_max = CAPTURE_MAX_NUM_PERIODS,
116 };
117
acp_reg_read(void __iomem * acp_mmio,u32 reg)118 static u32 acp_reg_read(void __iomem *acp_mmio, u32 reg)
119 {
120 return readl(acp_mmio + (reg * 4));
121 }
122
acp_reg_write(u32 val,void __iomem * acp_mmio,u32 reg)123 static void acp_reg_write(u32 val, void __iomem *acp_mmio, u32 reg)
124 {
125 writel(val, acp_mmio + (reg * 4));
126 }
127
128 /*
129 * Configure a given dma channel parameters - enable/disable,
130 * number of descriptors, priority
131 */
config_acp_dma_channel(void __iomem * acp_mmio,u8 ch_num,u16 dscr_strt_idx,u16 num_dscrs,enum acp_dma_priority_level priority_level)132 static void config_acp_dma_channel(void __iomem *acp_mmio, u8 ch_num,
133 u16 dscr_strt_idx, u16 num_dscrs,
134 enum acp_dma_priority_level priority_level)
135 {
136 u32 dma_ctrl;
137
138 /* disable the channel run field */
139 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
140 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
141 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
142
143 /* program a DMA channel with first descriptor to be processed. */
144 acp_reg_write((ACP_DMA_DSCR_STRT_IDX_0__DMAChDscrStrtIdx_MASK
145 & dscr_strt_idx),
146 acp_mmio, mmACP_DMA_DSCR_STRT_IDX_0 + ch_num);
147
148 /*
149 * program a DMA channel with the number of descriptors to be
150 * processed in the transfer
151 */
152 acp_reg_write(ACP_DMA_DSCR_CNT_0__DMAChDscrCnt_MASK & num_dscrs,
153 acp_mmio, mmACP_DMA_DSCR_CNT_0 + ch_num);
154
155 /* set DMA channel priority */
156 acp_reg_write(priority_level, acp_mmio, mmACP_DMA_PRIO_0 + ch_num);
157 }
158
159 /* Initialize a dma descriptor in SRAM based on descriptor information passed */
config_dma_descriptor_in_sram(void __iomem * acp_mmio,u16 descr_idx,acp_dma_dscr_transfer_t * descr_info)160 static void config_dma_descriptor_in_sram(void __iomem *acp_mmio,
161 u16 descr_idx,
162 acp_dma_dscr_transfer_t *descr_info)
163 {
164 u32 sram_offset;
165
166 sram_offset = (descr_idx * sizeof(acp_dma_dscr_transfer_t));
167
168 /* program the source base address. */
169 acp_reg_write(sram_offset, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
170 acp_reg_write(descr_info->src, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
171 /* program the destination base address. */
172 acp_reg_write(sram_offset + 4, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
173 acp_reg_write(descr_info->dest, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
174
175 /* program the number of bytes to be transferred for this descriptor. */
176 acp_reg_write(sram_offset + 8, acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
177 acp_reg_write(descr_info->xfer_val, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
178 }
179
pre_config_reset(void __iomem * acp_mmio,u16 ch_num)180 static void pre_config_reset(void __iomem *acp_mmio, u16 ch_num)
181 {
182 u32 dma_ctrl;
183 int ret;
184
185 /* clear the reset bit */
186 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
187 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
188 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
189 /* check the reset bit before programming configuration registers */
190 ret = readl_poll_timeout(acp_mmio + ((mmACP_DMA_CNTL_0 + ch_num) * 4),
191 dma_ctrl,
192 !(dma_ctrl & ACP_DMA_CNTL_0__DMAChRst_MASK),
193 100, ACP_DMA_RESET_TIME);
194 if (ret < 0)
195 pr_err("Failed to clear reset of channel : %d\n", ch_num);
196 }
197
198 /*
199 * Initialize the DMA descriptor information for transfer between
200 * system memory <-> ACP SRAM
201 */
set_acp_sysmem_dma_descriptors(void __iomem * acp_mmio,u32 size,int direction,u32 pte_offset,u16 ch,u32 sram_bank,u16 dma_dscr_idx,u32 asic_type)202 static void set_acp_sysmem_dma_descriptors(void __iomem *acp_mmio,
203 u32 size, int direction,
204 u32 pte_offset, u16 ch,
205 u32 sram_bank, u16 dma_dscr_idx,
206 u32 asic_type)
207 {
208 u16 i;
209 acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL];
210
211 for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) {
212 dmadscr[i].xfer_val = 0;
213 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
214 dma_dscr_idx = dma_dscr_idx + i;
215 dmadscr[i].dest = sram_bank + (i * (size / 2));
216 dmadscr[i].src = ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS
217 + (pte_offset * SZ_4K) + (i * (size / 2));
218 switch (asic_type) {
219 case CHIP_STONEY:
220 dmadscr[i].xfer_val |=
221 (ACP_DMA_ATTR_DAGB_GARLIC_TO_SHAREDMEM << 16) |
222 (size / 2);
223 break;
224 default:
225 dmadscr[i].xfer_val |=
226 (ACP_DMA_ATTR_DAGB_ONION_TO_SHAREDMEM << 16) |
227 (size / 2);
228 }
229 } else {
230 dma_dscr_idx = dma_dscr_idx + i;
231 dmadscr[i].src = sram_bank + (i * (size / 2));
232 dmadscr[i].dest =
233 ACP_INTERNAL_APERTURE_WINDOW_0_ADDRESS +
234 (pte_offset * SZ_4K) + (i * (size / 2));
235 switch (asic_type) {
236 case CHIP_STONEY:
237 dmadscr[i].xfer_val |=
238 (ACP_DMA_ATTR_SHARED_MEM_TO_DAGB_GARLIC << 16) |
239 (size / 2);
240 break;
241 default:
242 dmadscr[i].xfer_val |=
243 (ACP_DMA_ATTR_SHAREDMEM_TO_DAGB_ONION << 16) |
244 (size / 2);
245 }
246 }
247 config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx,
248 &dmadscr[i]);
249 }
250 pre_config_reset(acp_mmio, ch);
251 config_acp_dma_channel(acp_mmio, ch,
252 dma_dscr_idx - 1,
253 NUM_DSCRS_PER_CHANNEL,
254 ACP_DMA_PRIORITY_LEVEL_NORMAL);
255 }
256
257 /*
258 * Initialize the DMA descriptor information for transfer between
259 * ACP SRAM <-> I2S
260 */
set_acp_to_i2s_dma_descriptors(void __iomem * acp_mmio,u32 size,int direction,u32 sram_bank,u16 destination,u16 ch,u16 dma_dscr_idx,u32 asic_type)261 static void set_acp_to_i2s_dma_descriptors(void __iomem *acp_mmio, u32 size,
262 int direction, u32 sram_bank,
263 u16 destination, u16 ch,
264 u16 dma_dscr_idx, u32 asic_type)
265 {
266 u16 i;
267 acp_dma_dscr_transfer_t dmadscr[NUM_DSCRS_PER_CHANNEL];
268
269 for (i = 0; i < NUM_DSCRS_PER_CHANNEL; i++) {
270 dmadscr[i].xfer_val = 0;
271 if (direction == SNDRV_PCM_STREAM_PLAYBACK) {
272 dma_dscr_idx = dma_dscr_idx + i;
273 dmadscr[i].src = sram_bank + (i * (size / 2));
274 /* dmadscr[i].dest is unused by hardware. */
275 dmadscr[i].dest = 0;
276 dmadscr[i].xfer_val |= BIT(22) | (destination << 16) |
277 (size / 2);
278 } else {
279 dma_dscr_idx = dma_dscr_idx + i;
280 /* dmadscr[i].src is unused by hardware. */
281 dmadscr[i].src = 0;
282 dmadscr[i].dest =
283 sram_bank + (i * (size / 2));
284 dmadscr[i].xfer_val |= BIT(22) |
285 (destination << 16) | (size / 2);
286 }
287 config_dma_descriptor_in_sram(acp_mmio, dma_dscr_idx,
288 &dmadscr[i]);
289 }
290 pre_config_reset(acp_mmio, ch);
291 /* Configure the DMA channel with the above descriptor */
292 config_acp_dma_channel(acp_mmio, ch, dma_dscr_idx - 1,
293 NUM_DSCRS_PER_CHANNEL,
294 ACP_DMA_PRIORITY_LEVEL_NORMAL);
295 }
296
297 /* Create page table entries in ACP SRAM for the allocated memory */
acp_pte_config(void __iomem * acp_mmio,dma_addr_t addr,u16 num_of_pages,u32 pte_offset)298 static void acp_pte_config(void __iomem *acp_mmio, dma_addr_t addr,
299 u16 num_of_pages, u32 pte_offset)
300 {
301 u16 page_idx;
302 u32 low;
303 u32 high;
304 u32 offset;
305
306 offset = ACP_DAGB_GRP_SRBM_SRAM_BASE_OFFSET + (pte_offset * 8);
307 for (page_idx = 0; page_idx < (num_of_pages); page_idx++) {
308 /* Load the low address of page int ACP SRAM through SRBM */
309 acp_reg_write((offset + (page_idx * 8)),
310 acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
311
312 low = lower_32_bits(addr);
313 high = upper_32_bits(addr);
314
315 acp_reg_write(low, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
316
317 /* Load the High address of page int ACP SRAM through SRBM */
318 acp_reg_write((offset + (page_idx * 8) + 4),
319 acp_mmio, mmACP_SRBM_Targ_Idx_Addr);
320
321 /* page enable in ACP */
322 high |= BIT(31);
323 acp_reg_write(high, acp_mmio, mmACP_SRBM_Targ_Idx_Data);
324
325 /* Move to next physically contiguous page */
326 addr += PAGE_SIZE;
327 }
328 }
329
config_acp_dma(void __iomem * acp_mmio,struct audio_substream_data * rtd,u32 asic_type)330 static void config_acp_dma(void __iomem *acp_mmio,
331 struct audio_substream_data *rtd,
332 u32 asic_type)
333 {
334 u16 ch_acp_sysmem, ch_acp_i2s;
335
336 acp_pte_config(acp_mmio, rtd->dma_addr, rtd->num_of_pages,
337 rtd->pte_offset);
338
339 if (rtd->direction == SNDRV_PCM_STREAM_PLAYBACK) {
340 ch_acp_sysmem = rtd->ch1;
341 ch_acp_i2s = rtd->ch2;
342 } else {
343 ch_acp_i2s = rtd->ch1;
344 ch_acp_sysmem = rtd->ch2;
345 }
346 /* Configure System memory <-> ACP SRAM DMA descriptors */
347 set_acp_sysmem_dma_descriptors(acp_mmio, rtd->size,
348 rtd->direction, rtd->pte_offset,
349 ch_acp_sysmem, rtd->sram_bank,
350 rtd->dma_dscr_idx_1, asic_type);
351 /* Configure ACP SRAM <-> I2S DMA descriptors */
352 set_acp_to_i2s_dma_descriptors(acp_mmio, rtd->size,
353 rtd->direction, rtd->sram_bank,
354 rtd->destination, ch_acp_i2s,
355 rtd->dma_dscr_idx_2, asic_type);
356 }
357
acp_dma_cap_channel_enable(void __iomem * acp_mmio,u16 cap_channel)358 static void acp_dma_cap_channel_enable(void __iomem *acp_mmio,
359 u16 cap_channel)
360 {
361 u32 val, ch_reg, imr_reg, res_reg;
362
363 switch (cap_channel) {
364 case CAP_CHANNEL1:
365 ch_reg = mmACP_I2SMICSP_RER1;
366 res_reg = mmACP_I2SMICSP_RCR1;
367 imr_reg = mmACP_I2SMICSP_IMR1;
368 break;
369 case CAP_CHANNEL0:
370 default:
371 ch_reg = mmACP_I2SMICSP_RER0;
372 res_reg = mmACP_I2SMICSP_RCR0;
373 imr_reg = mmACP_I2SMICSP_IMR0;
374 break;
375 }
376 val = acp_reg_read(acp_mmio,
377 mmACP_I2S_16BIT_RESOLUTION_EN);
378 if (val & ACP_I2S_MIC_16BIT_RESOLUTION_EN) {
379 acp_reg_write(0x0, acp_mmio, ch_reg);
380 /* Set 16bit resolution on capture */
381 acp_reg_write(0x2, acp_mmio, res_reg);
382 }
383 val = acp_reg_read(acp_mmio, imr_reg);
384 val &= ~ACP_I2SMICSP_IMR1__I2SMICSP_RXDAM_MASK;
385 val &= ~ACP_I2SMICSP_IMR1__I2SMICSP_RXFOM_MASK;
386 acp_reg_write(val, acp_mmio, imr_reg);
387 acp_reg_write(0x1, acp_mmio, ch_reg);
388 }
389
acp_dma_cap_channel_disable(void __iomem * acp_mmio,u16 cap_channel)390 static void acp_dma_cap_channel_disable(void __iomem *acp_mmio,
391 u16 cap_channel)
392 {
393 u32 val, ch_reg, imr_reg;
394
395 switch (cap_channel) {
396 case CAP_CHANNEL1:
397 imr_reg = mmACP_I2SMICSP_IMR1;
398 ch_reg = mmACP_I2SMICSP_RER1;
399 break;
400 case CAP_CHANNEL0:
401 default:
402 imr_reg = mmACP_I2SMICSP_IMR0;
403 ch_reg = mmACP_I2SMICSP_RER0;
404 break;
405 }
406 val = acp_reg_read(acp_mmio, imr_reg);
407 val |= ACP_I2SMICSP_IMR1__I2SMICSP_RXDAM_MASK;
408 val |= ACP_I2SMICSP_IMR1__I2SMICSP_RXFOM_MASK;
409 acp_reg_write(val, acp_mmio, imr_reg);
410 acp_reg_write(0x0, acp_mmio, ch_reg);
411 }
412
413 /* Start a given DMA channel transfer */
acp_dma_start(void __iomem * acp_mmio,u16 ch_num,bool is_circular)414 static void acp_dma_start(void __iomem *acp_mmio, u16 ch_num, bool is_circular)
415 {
416 u32 dma_ctrl;
417
418 /* read the dma control register and disable the channel run field */
419 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
420
421 /* Invalidating the DAGB cache */
422 acp_reg_write(1, acp_mmio, mmACP_DAGB_ATU_CTRL);
423
424 /*
425 * configure the DMA channel and start the DMA transfer
426 * set dmachrun bit to start the transfer and enable the
427 * interrupt on completion of the dma transfer
428 */
429 dma_ctrl |= ACP_DMA_CNTL_0__DMAChRun_MASK;
430
431 switch (ch_num) {
432 case ACP_TO_I2S_DMA_CH_NUM:
433 case I2S_TO_ACP_DMA_CH_NUM:
434 case ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM:
435 case I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM:
436 dma_ctrl |= ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
437 break;
438 default:
439 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
440 break;
441 }
442
443 /* enable for ACP to SRAM DMA channel */
444 if (is_circular == true)
445 dma_ctrl |= ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
446 else
447 dma_ctrl &= ~ACP_DMA_CNTL_0__Circular_DMA_En_MASK;
448
449 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
450 }
451
452 /* Stop a given DMA channel transfer */
acp_dma_stop(void __iomem * acp_mmio,u8 ch_num)453 static int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
454 {
455 u32 dma_ctrl;
456 u32 dma_ch_sts;
457 u32 count = ACP_DMA_RESET_TIME;
458
459 dma_ctrl = acp_reg_read(acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
460
461 /*
462 * clear the dma control register fields before writing zero
463 * in reset bit
464 */
465 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRun_MASK;
466 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChIOCEn_MASK;
467
468 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
469 dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
470
471 if (dma_ch_sts & BIT(ch_num)) {
472 /*
473 * set the reset bit for this channel to stop the dma
474 * transfer
475 */
476 dma_ctrl |= ACP_DMA_CNTL_0__DMAChRst_MASK;
477 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0 + ch_num);
478 }
479
480 /* check the channel status bit for some time and return the status */
481 while (true) {
482 dma_ch_sts = acp_reg_read(acp_mmio, mmACP_DMA_CH_STS);
483 if (!(dma_ch_sts & BIT(ch_num))) {
484 /*
485 * clear the reset flag after successfully stopping
486 * the dma transfer and break from the loop
487 */
488 dma_ctrl &= ~ACP_DMA_CNTL_0__DMAChRst_MASK;
489
490 acp_reg_write(dma_ctrl, acp_mmio, mmACP_DMA_CNTL_0
491 + ch_num);
492 break;
493 }
494 if (--count == 0) {
495 pr_err("Failed to stop ACP DMA channel : %d\n", ch_num);
496 return -ETIMEDOUT;
497 }
498 udelay(100);
499 }
500 return 0;
501 }
502
acp_set_sram_bank_state(void __iomem * acp_mmio,u16 bank,bool power_on)503 static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank,
504 bool power_on)
505 {
506 u32 val, req_reg, sts_reg, sts_reg_mask;
507 u32 loops = 1000;
508
509 if (bank < 32) {
510 req_reg = mmACP_MEM_SHUT_DOWN_REQ_LO;
511 sts_reg = mmACP_MEM_SHUT_DOWN_STS_LO;
512 sts_reg_mask = 0xFFFFFFFF;
513
514 } else {
515 bank -= 32;
516 req_reg = mmACP_MEM_SHUT_DOWN_REQ_HI;
517 sts_reg = mmACP_MEM_SHUT_DOWN_STS_HI;
518 sts_reg_mask = 0x0000FFFF;
519 }
520
521 val = acp_reg_read(acp_mmio, req_reg);
522 if (val & (1 << bank)) {
523 /* bank is in off state */
524 if (power_on == true)
525 /* request to on */
526 val &= ~(1 << bank);
527 else
528 /* request to off */
529 return;
530 } else {
531 /* bank is in on state */
532 if (power_on == false)
533 /* request to off */
534 val |= 1 << bank;
535 else
536 /* request to on */
537 return;
538 }
539 acp_reg_write(val, acp_mmio, req_reg);
540
541 while (acp_reg_read(acp_mmio, sts_reg) != sts_reg_mask) {
542 if (!loops--) {
543 pr_err("ACP SRAM bank %d state change failed\n", bank);
544 break;
545 }
546 cpu_relax();
547 }
548 }
549
550 /* Initialize and bring ACP hardware to default state. */
acp_init(void __iomem * acp_mmio,u32 asic_type)551 static int acp_init(void __iomem *acp_mmio, u32 asic_type)
552 {
553 u16 bank;
554 u32 val, count, sram_pte_offset;
555
556 /* Assert Soft reset of ACP */
557 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
558
559 val |= ACP_SOFT_RESET__SoftResetAud_MASK;
560 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
561
562 count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
563 while (true) {
564 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
565 if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
566 (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
567 break;
568 if (--count == 0) {
569 pr_err("Failed to reset ACP\n");
570 return -ETIMEDOUT;
571 }
572 udelay(100);
573 }
574
575 /* Enable clock to ACP and wait until the clock is enabled */
576 val = acp_reg_read(acp_mmio, mmACP_CONTROL);
577 val = val | ACP_CONTROL__ClkEn_MASK;
578 acp_reg_write(val, acp_mmio, mmACP_CONTROL);
579
580 count = ACP_CLOCK_EN_TIME_OUT_VALUE;
581
582 while (true) {
583 val = acp_reg_read(acp_mmio, mmACP_STATUS);
584 if (val & (u32)0x1)
585 break;
586 if (--count == 0) {
587 pr_err("Failed to reset ACP\n");
588 return -ETIMEDOUT;
589 }
590 udelay(100);
591 }
592
593 /* Deassert the SOFT RESET flags */
594 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
595 val &= ~ACP_SOFT_RESET__SoftResetAud_MASK;
596 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
597
598 /* For BT instance change pins from UART to BT */
599 if (!bt_uart_enable) {
600 val = acp_reg_read(acp_mmio, mmACP_BT_UART_PAD_SEL);
601 val |= ACP_BT_UART_PAD_SELECT_MASK;
602 acp_reg_write(val, acp_mmio, mmACP_BT_UART_PAD_SEL);
603 }
604
605 /* initialize Onion control DAGB register */
606 acp_reg_write(ACP_ONION_CNTL_DEFAULT, acp_mmio,
607 mmACP_AXI2DAGB_ONION_CNTL);
608
609 /* initialize Garlic control DAGB registers */
610 acp_reg_write(ACP_GARLIC_CNTL_DEFAULT, acp_mmio,
611 mmACP_AXI2DAGB_GARLIC_CNTL);
612
613 sram_pte_offset = ACP_DAGB_GRP_SRAM_BASE_ADDRESS |
614 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBSnoopSel_MASK |
615 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBTargetMemSel_MASK |
616 ACP_DAGB_BASE_ADDR_GRP_1__AXI2DAGBGrpEnable_MASK;
617 acp_reg_write(sram_pte_offset, acp_mmio, mmACP_DAGB_BASE_ADDR_GRP_1);
618 acp_reg_write(ACP_PAGE_SIZE_4K_ENABLE, acp_mmio,
619 mmACP_DAGB_PAGE_SIZE_GRP_1);
620
621 acp_reg_write(ACP_SRAM_BASE_ADDRESS, acp_mmio,
622 mmACP_DMA_DESC_BASE_ADDR);
623
624 /* Num of descriptors in SRAM 0x4, means 256 descriptors;(64 * 4) */
625 acp_reg_write(0x4, acp_mmio, mmACP_DMA_DESC_MAX_NUM_DSCR);
626 acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
627 acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
628
629 /*
630 * When ACP_TILE_P1 is turned on, all SRAM banks get turned on.
631 * Now, turn off all of them. This can't be done in 'poweron' of
632 * ACP pm domain, as this requires ACP to be initialized.
633 * For Stoney, Memory gating is disabled,i.e SRAM Banks
634 * won't be turned off. The default state for SRAM banks is ON.
635 * Setting SRAM bank state code skipped for STONEY platform.
636 */
637 if (asic_type != CHIP_STONEY) {
638 for (bank = 1; bank < 48; bank++)
639 acp_set_sram_bank_state(acp_mmio, bank, false);
640 }
641 return 0;
642 }
643
644 /* Deinitialize ACP */
acp_deinit(void __iomem * acp_mmio)645 static int acp_deinit(void __iomem *acp_mmio)
646 {
647 u32 val;
648 u32 count;
649
650 /* Assert Soft reset of ACP */
651 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
652
653 val |= ACP_SOFT_RESET__SoftResetAud_MASK;
654 acp_reg_write(val, acp_mmio, mmACP_SOFT_RESET);
655
656 count = ACP_SOFT_RESET_DONE_TIME_OUT_VALUE;
657 while (true) {
658 val = acp_reg_read(acp_mmio, mmACP_SOFT_RESET);
659 if (ACP_SOFT_RESET__SoftResetAudDone_MASK ==
660 (val & ACP_SOFT_RESET__SoftResetAudDone_MASK))
661 break;
662 if (--count == 0) {
663 pr_err("Failed to reset ACP\n");
664 return -ETIMEDOUT;
665 }
666 udelay(100);
667 }
668 /* Disable ACP clock */
669 val = acp_reg_read(acp_mmio, mmACP_CONTROL);
670 val &= ~ACP_CONTROL__ClkEn_MASK;
671 acp_reg_write(val, acp_mmio, mmACP_CONTROL);
672
673 count = ACP_CLOCK_EN_TIME_OUT_VALUE;
674
675 while (true) {
676 val = acp_reg_read(acp_mmio, mmACP_STATUS);
677 if (!(val & (u32)0x1))
678 break;
679 if (--count == 0) {
680 pr_err("Failed to reset ACP\n");
681 return -ETIMEDOUT;
682 }
683 udelay(100);
684 }
685 return 0;
686 }
687
688 /* ACP DMA irq handler routine for playback, capture usecases */
dma_irq_handler(int irq,void * arg)689 static irqreturn_t dma_irq_handler(int irq, void *arg)
690 {
691 u16 dscr_idx;
692 u32 intr_flag, ext_intr_status;
693 struct audio_drv_data *irq_data;
694 void __iomem *acp_mmio;
695 struct device *dev = arg;
696 bool valid_irq = false;
697
698 irq_data = dev_get_drvdata(dev);
699 acp_mmio = irq_data->acp_mmio;
700
701 ext_intr_status = acp_reg_read(acp_mmio, mmACP_EXTERNAL_INTR_STAT);
702 intr_flag = (((ext_intr_status &
703 ACP_EXTERNAL_INTR_STAT__DMAIOCStat_MASK) >>
704 ACP_EXTERNAL_INTR_STAT__DMAIOCStat__SHIFT));
705
706 if ((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) != 0) {
707 valid_irq = true;
708 snd_pcm_period_elapsed(irq_data->play_i2ssp_stream);
709 acp_reg_write((intr_flag & BIT(ACP_TO_I2S_DMA_CH_NUM)) << 16,
710 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
711 }
712
713 if ((intr_flag & BIT(ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM)) != 0) {
714 valid_irq = true;
715 snd_pcm_period_elapsed(irq_data->play_i2sbt_stream);
716 acp_reg_write((intr_flag &
717 BIT(ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM)) << 16,
718 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
719 }
720
721 if ((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) != 0) {
722 valid_irq = true;
723 if (acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_14) ==
724 CAPTURE_START_DMA_DESCR_CH15)
725 dscr_idx = CAPTURE_END_DMA_DESCR_CH14;
726 else
727 dscr_idx = CAPTURE_START_DMA_DESCR_CH14;
728 config_acp_dma_channel(acp_mmio, ACP_TO_SYSRAM_CH_NUM, dscr_idx,
729 1, 0);
730 acp_dma_start(acp_mmio, ACP_TO_SYSRAM_CH_NUM, false);
731
732 snd_pcm_period_elapsed(irq_data->capture_i2ssp_stream);
733 acp_reg_write((intr_flag & BIT(I2S_TO_ACP_DMA_CH_NUM)) << 16,
734 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
735 }
736
737 if ((intr_flag & BIT(I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM)) != 0) {
738 valid_irq = true;
739 if (acp_reg_read(acp_mmio, mmACP_DMA_CUR_DSCR_10) ==
740 CAPTURE_START_DMA_DESCR_CH11)
741 dscr_idx = CAPTURE_END_DMA_DESCR_CH10;
742 else
743 dscr_idx = CAPTURE_START_DMA_DESCR_CH10;
744 config_acp_dma_channel(acp_mmio,
745 ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
746 dscr_idx, 1, 0);
747 acp_dma_start(acp_mmio, ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM,
748 false);
749
750 snd_pcm_period_elapsed(irq_data->capture_i2sbt_stream);
751 acp_reg_write((intr_flag &
752 BIT(I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM)) << 16,
753 acp_mmio, mmACP_EXTERNAL_INTR_STAT);
754 }
755
756 if (valid_irq)
757 return IRQ_HANDLED;
758 else
759 return IRQ_NONE;
760 }
761
acp_dma_open(struct snd_soc_component * component,struct snd_pcm_substream * substream)762 static int acp_dma_open(struct snd_soc_component *component,
763 struct snd_pcm_substream *substream)
764 {
765 u16 bank;
766 int ret = 0;
767 struct snd_pcm_runtime *runtime = substream->runtime;
768 struct audio_drv_data *intr_data = dev_get_drvdata(component->dev);
769 struct audio_substream_data *adata =
770 kzalloc(sizeof(struct audio_substream_data), GFP_KERNEL);
771 if (!adata)
772 return -ENOMEM;
773
774 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
775 switch (intr_data->asic_type) {
776 case CHIP_STONEY:
777 runtime->hw = acp_st_pcm_hardware_playback;
778 break;
779 default:
780 runtime->hw = acp_pcm_hardware_playback;
781 }
782 } else {
783 switch (intr_data->asic_type) {
784 case CHIP_STONEY:
785 runtime->hw = acp_st_pcm_hardware_capture;
786 break;
787 default:
788 runtime->hw = acp_pcm_hardware_capture;
789 }
790 }
791
792 ret = snd_pcm_hw_constraint_integer(runtime,
793 SNDRV_PCM_HW_PARAM_PERIODS);
794 if (ret < 0) {
795 dev_err(component->dev, "set integer constraint failed\n");
796 kfree(adata);
797 return ret;
798 }
799
800 adata->acp_mmio = intr_data->acp_mmio;
801 runtime->private_data = adata;
802
803 /*
804 * Enable ACP irq, when neither playback or capture streams are
805 * active by the time when a new stream is being opened.
806 * This enablement is not required for another stream, if current
807 * stream is not closed
808 */
809 if (!intr_data->play_i2ssp_stream && !intr_data->capture_i2ssp_stream &&
810 !intr_data->play_i2sbt_stream && !intr_data->capture_i2sbt_stream)
811 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
812
813 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
814 /*
815 * For Stoney, Memory gating is disabled,i.e SRAM Banks
816 * won't be turned off. The default state for SRAM banks is ON.
817 * Setting SRAM bank state code skipped for STONEY platform.
818 */
819 if (intr_data->asic_type != CHIP_STONEY) {
820 for (bank = 1; bank <= 4; bank++)
821 acp_set_sram_bank_state(intr_data->acp_mmio,
822 bank, true);
823 }
824 } else {
825 if (intr_data->asic_type != CHIP_STONEY) {
826 for (bank = 5; bank <= 8; bank++)
827 acp_set_sram_bank_state(intr_data->acp_mmio,
828 bank, true);
829 }
830 }
831
832 return 0;
833 }
834
acp_dma_hw_params(struct snd_soc_component * component,struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)835 static int acp_dma_hw_params(struct snd_soc_component *component,
836 struct snd_pcm_substream *substream,
837 struct snd_pcm_hw_params *params)
838 {
839 uint64_t size;
840 u32 val = 0;
841 struct snd_pcm_runtime *runtime;
842 struct audio_substream_data *rtd;
843 struct snd_soc_pcm_runtime *prtd = asoc_substream_to_rtd(substream);
844 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
845 struct snd_soc_card *card = prtd->card;
846 struct acp_platform_info *pinfo = snd_soc_card_get_drvdata(card);
847
848 runtime = substream->runtime;
849 rtd = runtime->private_data;
850
851 if (WARN_ON(!rtd))
852 return -EINVAL;
853
854 if (pinfo) {
855 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
856 rtd->i2s_instance = pinfo->play_i2s_instance;
857 } else {
858 rtd->i2s_instance = pinfo->cap_i2s_instance;
859 rtd->capture_channel = pinfo->capture_channel;
860 }
861 }
862 if (adata->asic_type == CHIP_STONEY) {
863 val = acp_reg_read(adata->acp_mmio,
864 mmACP_I2S_16BIT_RESOLUTION_EN);
865 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
866 switch (rtd->i2s_instance) {
867 case I2S_BT_INSTANCE:
868 val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
869 break;
870 case I2S_SP_INSTANCE:
871 default:
872 val |= ACP_I2S_SP_16BIT_RESOLUTION_EN;
873 }
874 } else {
875 switch (rtd->i2s_instance) {
876 case I2S_BT_INSTANCE:
877 val |= ACP_I2S_BT_16BIT_RESOLUTION_EN;
878 break;
879 case I2S_SP_INSTANCE:
880 default:
881 val |= ACP_I2S_MIC_16BIT_RESOLUTION_EN;
882 }
883 }
884 acp_reg_write(val, adata->acp_mmio,
885 mmACP_I2S_16BIT_RESOLUTION_EN);
886 }
887
888 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
889 switch (rtd->i2s_instance) {
890 case I2S_BT_INSTANCE:
891 rtd->pte_offset = ACP_ST_BT_PLAYBACK_PTE_OFFSET;
892 rtd->ch1 = SYSRAM_TO_ACP_BT_INSTANCE_CH_NUM;
893 rtd->ch2 = ACP_TO_I2S_DMA_BT_INSTANCE_CH_NUM;
894 rtd->sram_bank = ACP_SRAM_BANK_3_ADDRESS;
895 rtd->destination = TO_BLUETOOTH;
896 rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH8;
897 rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH9;
898 rtd->byte_cnt_high_reg_offset =
899 mmACP_I2S_BT_TRANSMIT_BYTE_CNT_HIGH;
900 rtd->byte_cnt_low_reg_offset =
901 mmACP_I2S_BT_TRANSMIT_BYTE_CNT_LOW;
902 adata->play_i2sbt_stream = substream;
903 break;
904 case I2S_SP_INSTANCE:
905 default:
906 switch (adata->asic_type) {
907 case CHIP_STONEY:
908 rtd->pte_offset = ACP_ST_PLAYBACK_PTE_OFFSET;
909 break;
910 default:
911 rtd->pte_offset = ACP_PLAYBACK_PTE_OFFSET;
912 }
913 rtd->ch1 = SYSRAM_TO_ACP_CH_NUM;
914 rtd->ch2 = ACP_TO_I2S_DMA_CH_NUM;
915 rtd->sram_bank = ACP_SRAM_BANK_1_ADDRESS;
916 rtd->destination = TO_ACP_I2S_1;
917 rtd->dma_dscr_idx_1 = PLAYBACK_START_DMA_DESCR_CH12;
918 rtd->dma_dscr_idx_2 = PLAYBACK_START_DMA_DESCR_CH13;
919 rtd->byte_cnt_high_reg_offset =
920 mmACP_I2S_TRANSMIT_BYTE_CNT_HIGH;
921 rtd->byte_cnt_low_reg_offset =
922 mmACP_I2S_TRANSMIT_BYTE_CNT_LOW;
923 adata->play_i2ssp_stream = substream;
924 }
925 } else {
926 switch (rtd->i2s_instance) {
927 case I2S_BT_INSTANCE:
928 rtd->pte_offset = ACP_ST_BT_CAPTURE_PTE_OFFSET;
929 rtd->ch1 = I2S_TO_ACP_DMA_BT_INSTANCE_CH_NUM;
930 rtd->ch2 = ACP_TO_SYSRAM_BT_INSTANCE_CH_NUM;
931 rtd->sram_bank = ACP_SRAM_BANK_4_ADDRESS;
932 rtd->destination = FROM_BLUETOOTH;
933 rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH10;
934 rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH11;
935 rtd->byte_cnt_high_reg_offset =
936 mmACP_I2S_BT_RECEIVE_BYTE_CNT_HIGH;
937 rtd->byte_cnt_low_reg_offset =
938 mmACP_I2S_BT_RECEIVE_BYTE_CNT_LOW;
939 rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_11;
940 adata->capture_i2sbt_stream = substream;
941 break;
942 case I2S_SP_INSTANCE:
943 default:
944 rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
945 rtd->ch1 = I2S_TO_ACP_DMA_CH_NUM;
946 rtd->ch2 = ACP_TO_SYSRAM_CH_NUM;
947 switch (adata->asic_type) {
948 case CHIP_STONEY:
949 rtd->pte_offset = ACP_ST_CAPTURE_PTE_OFFSET;
950 rtd->sram_bank = ACP_SRAM_BANK_2_ADDRESS;
951 break;
952 default:
953 rtd->pte_offset = ACP_CAPTURE_PTE_OFFSET;
954 rtd->sram_bank = ACP_SRAM_BANK_5_ADDRESS;
955 }
956 rtd->destination = FROM_ACP_I2S_1;
957 rtd->dma_dscr_idx_1 = CAPTURE_START_DMA_DESCR_CH14;
958 rtd->dma_dscr_idx_2 = CAPTURE_START_DMA_DESCR_CH15;
959 rtd->byte_cnt_high_reg_offset =
960 mmACP_I2S_RECEIVED_BYTE_CNT_HIGH;
961 rtd->byte_cnt_low_reg_offset =
962 mmACP_I2S_RECEIVED_BYTE_CNT_LOW;
963 rtd->dma_curr_dscr = mmACP_DMA_CUR_DSCR_15;
964 adata->capture_i2ssp_stream = substream;
965 }
966 }
967
968 size = params_buffer_bytes(params);
969
970 acp_set_sram_bank_state(rtd->acp_mmio, 0, true);
971 /* Save for runtime private data */
972 rtd->dma_addr = runtime->dma_addr;
973 rtd->order = get_order(size);
974
975 /* Fill the page table entries in ACP SRAM */
976 rtd->size = size;
977 rtd->num_of_pages = PAGE_ALIGN(size) >> PAGE_SHIFT;
978 rtd->direction = substream->stream;
979
980 config_acp_dma(rtd->acp_mmio, rtd, adata->asic_type);
981 return 0;
982 }
983
acp_get_byte_count(struct audio_substream_data * rtd)984 static u64 acp_get_byte_count(struct audio_substream_data *rtd)
985 {
986 union acp_dma_count byte_count;
987
988 byte_count.bcount.high = acp_reg_read(rtd->acp_mmio,
989 rtd->byte_cnt_high_reg_offset);
990 byte_count.bcount.low = acp_reg_read(rtd->acp_mmio,
991 rtd->byte_cnt_low_reg_offset);
992 return byte_count.bytescount;
993 }
994
acp_dma_pointer(struct snd_soc_component * component,struct snd_pcm_substream * substream)995 static snd_pcm_uframes_t acp_dma_pointer(struct snd_soc_component *component,
996 struct snd_pcm_substream *substream)
997 {
998 u32 buffersize;
999 u32 pos = 0;
1000 u64 bytescount = 0;
1001 u16 dscr;
1002 u32 period_bytes, delay;
1003
1004 struct snd_pcm_runtime *runtime = substream->runtime;
1005 struct audio_substream_data *rtd = runtime->private_data;
1006
1007 if (!rtd)
1008 return -EINVAL;
1009
1010 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
1011 period_bytes = frames_to_bytes(runtime, runtime->period_size);
1012 bytescount = acp_get_byte_count(rtd);
1013 if (bytescount >= rtd->bytescount)
1014 bytescount -= rtd->bytescount;
1015 if (bytescount < period_bytes) {
1016 pos = 0;
1017 } else {
1018 dscr = acp_reg_read(rtd->acp_mmio, rtd->dma_curr_dscr);
1019 if (dscr == rtd->dma_dscr_idx_1)
1020 pos = period_bytes;
1021 else
1022 pos = 0;
1023 }
1024 if (bytescount > 0) {
1025 delay = do_div(bytescount, period_bytes);
1026 runtime->delay = bytes_to_frames(runtime, delay);
1027 }
1028 } else {
1029 buffersize = frames_to_bytes(runtime, runtime->buffer_size);
1030 bytescount = acp_get_byte_count(rtd);
1031 if (bytescount > rtd->bytescount)
1032 bytescount -= rtd->bytescount;
1033 pos = do_div(bytescount, buffersize);
1034 }
1035 return bytes_to_frames(runtime, pos);
1036 }
1037
acp_dma_prepare(struct snd_soc_component * component,struct snd_pcm_substream * substream)1038 static int acp_dma_prepare(struct snd_soc_component *component,
1039 struct snd_pcm_substream *substream)
1040 {
1041 struct snd_pcm_runtime *runtime = substream->runtime;
1042 struct audio_substream_data *rtd = runtime->private_data;
1043 u16 ch_acp_sysmem, ch_acp_i2s;
1044
1045 if (!rtd)
1046 return -EINVAL;
1047
1048 if (rtd->direction == SNDRV_PCM_STREAM_PLAYBACK) {
1049 ch_acp_sysmem = rtd->ch1;
1050 ch_acp_i2s = rtd->ch2;
1051 } else {
1052 ch_acp_i2s = rtd->ch1;
1053 ch_acp_sysmem = rtd->ch2;
1054 }
1055 config_acp_dma_channel(rtd->acp_mmio,
1056 ch_acp_sysmem,
1057 rtd->dma_dscr_idx_1,
1058 NUM_DSCRS_PER_CHANNEL, 0);
1059 config_acp_dma_channel(rtd->acp_mmio,
1060 ch_acp_i2s,
1061 rtd->dma_dscr_idx_2,
1062 NUM_DSCRS_PER_CHANNEL, 0);
1063 return 0;
1064 }
1065
acp_dma_trigger(struct snd_soc_component * component,struct snd_pcm_substream * substream,int cmd)1066 static int acp_dma_trigger(struct snd_soc_component *component,
1067 struct snd_pcm_substream *substream, int cmd)
1068 {
1069 int ret;
1070
1071 struct snd_pcm_runtime *runtime = substream->runtime;
1072 struct audio_substream_data *rtd = runtime->private_data;
1073
1074 if (!rtd)
1075 return -EINVAL;
1076 switch (cmd) {
1077 case SNDRV_PCM_TRIGGER_START:
1078 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
1079 case SNDRV_PCM_TRIGGER_RESUME:
1080 rtd->bytescount = acp_get_byte_count(rtd);
1081 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
1082 if (rtd->capture_channel == CAP_CHANNEL0) {
1083 acp_dma_cap_channel_disable(rtd->acp_mmio,
1084 CAP_CHANNEL1);
1085 acp_dma_cap_channel_enable(rtd->acp_mmio,
1086 CAP_CHANNEL0);
1087 }
1088 if (rtd->capture_channel == CAP_CHANNEL1) {
1089 acp_dma_cap_channel_disable(rtd->acp_mmio,
1090 CAP_CHANNEL0);
1091 acp_dma_cap_channel_enable(rtd->acp_mmio,
1092 CAP_CHANNEL1);
1093 }
1094 acp_dma_start(rtd->acp_mmio, rtd->ch1, true);
1095 } else {
1096 acp_dma_start(rtd->acp_mmio, rtd->ch1, true);
1097 acp_dma_start(rtd->acp_mmio, rtd->ch2, true);
1098 }
1099 ret = 0;
1100 break;
1101 case SNDRV_PCM_TRIGGER_STOP:
1102 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
1103 case SNDRV_PCM_TRIGGER_SUSPEND:
1104 acp_dma_stop(rtd->acp_mmio, rtd->ch2);
1105 ret = acp_dma_stop(rtd->acp_mmio, rtd->ch1);
1106 break;
1107 default:
1108 ret = -EINVAL;
1109 }
1110 return ret;
1111 }
1112
acp_dma_new(struct snd_soc_component * component,struct snd_soc_pcm_runtime * rtd)1113 static int acp_dma_new(struct snd_soc_component *component,
1114 struct snd_soc_pcm_runtime *rtd)
1115 {
1116 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
1117 struct device *parent = component->dev->parent;
1118
1119 switch (adata->asic_type) {
1120 case CHIP_STONEY:
1121 snd_pcm_set_managed_buffer_all(rtd->pcm,
1122 SNDRV_DMA_TYPE_DEV,
1123 parent,
1124 ST_MIN_BUFFER,
1125 ST_MAX_BUFFER);
1126 break;
1127 default:
1128 snd_pcm_set_managed_buffer_all(rtd->pcm,
1129 SNDRV_DMA_TYPE_DEV,
1130 parent,
1131 MIN_BUFFER,
1132 MAX_BUFFER);
1133 break;
1134 }
1135 return 0;
1136 }
1137
acp_dma_close(struct snd_soc_component * component,struct snd_pcm_substream * substream)1138 static int acp_dma_close(struct snd_soc_component *component,
1139 struct snd_pcm_substream *substream)
1140 {
1141 u16 bank;
1142 struct snd_pcm_runtime *runtime = substream->runtime;
1143 struct audio_substream_data *rtd = runtime->private_data;
1144 struct audio_drv_data *adata = dev_get_drvdata(component->dev);
1145
1146 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
1147 switch (rtd->i2s_instance) {
1148 case I2S_BT_INSTANCE:
1149 adata->play_i2sbt_stream = NULL;
1150 break;
1151 case I2S_SP_INSTANCE:
1152 default:
1153 adata->play_i2ssp_stream = NULL;
1154 /*
1155 * For Stoney, Memory gating is disabled,i.e SRAM Banks
1156 * won't be turned off. The default state for SRAM banks
1157 * is ON.Setting SRAM bank state code skipped for STONEY
1158 * platform. Added condition checks for Carrizo platform
1159 * only.
1160 */
1161 if (adata->asic_type != CHIP_STONEY) {
1162 for (bank = 1; bank <= 4; bank++)
1163 acp_set_sram_bank_state(adata->acp_mmio,
1164 bank, false);
1165 }
1166 }
1167 } else {
1168 switch (rtd->i2s_instance) {
1169 case I2S_BT_INSTANCE:
1170 adata->capture_i2sbt_stream = NULL;
1171 break;
1172 case I2S_SP_INSTANCE:
1173 default:
1174 adata->capture_i2ssp_stream = NULL;
1175 if (adata->asic_type != CHIP_STONEY) {
1176 for (bank = 5; bank <= 8; bank++)
1177 acp_set_sram_bank_state(adata->acp_mmio,
1178 bank, false);
1179 }
1180 }
1181 }
1182
1183 /*
1184 * Disable ACP irq, when the current stream is being closed and
1185 * another stream is also not active.
1186 */
1187 if (!adata->play_i2ssp_stream && !adata->capture_i2ssp_stream &&
1188 !adata->play_i2sbt_stream && !adata->capture_i2sbt_stream)
1189 acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1190 kfree(rtd);
1191 return 0;
1192 }
1193
1194 static const struct snd_soc_component_driver acp_asoc_platform = {
1195 .name = DRV_NAME,
1196 .open = acp_dma_open,
1197 .close = acp_dma_close,
1198 .hw_params = acp_dma_hw_params,
1199 .trigger = acp_dma_trigger,
1200 .pointer = acp_dma_pointer,
1201 .prepare = acp_dma_prepare,
1202 .pcm_construct = acp_dma_new,
1203 };
1204
acp_audio_probe(struct platform_device * pdev)1205 static int acp_audio_probe(struct platform_device *pdev)
1206 {
1207 int status;
1208 struct audio_drv_data *audio_drv_data;
1209 struct resource *res;
1210 const u32 *pdata = pdev->dev.platform_data;
1211
1212 if (!pdata) {
1213 dev_err(&pdev->dev, "Missing platform data\n");
1214 return -ENODEV;
1215 }
1216
1217 audio_drv_data = devm_kzalloc(&pdev->dev, sizeof(struct audio_drv_data),
1218 GFP_KERNEL);
1219 if (!audio_drv_data)
1220 return -ENOMEM;
1221
1222 audio_drv_data->acp_mmio = devm_platform_ioremap_resource(pdev, 0);
1223 if (IS_ERR(audio_drv_data->acp_mmio))
1224 return PTR_ERR(audio_drv_data->acp_mmio);
1225
1226 /*
1227 * The following members gets populated in device 'open'
1228 * function. Till then interrupts are disabled in 'acp_init'
1229 * and device doesn't generate any interrupts.
1230 */
1231
1232 audio_drv_data->play_i2ssp_stream = NULL;
1233 audio_drv_data->capture_i2ssp_stream = NULL;
1234 audio_drv_data->play_i2sbt_stream = NULL;
1235 audio_drv_data->capture_i2sbt_stream = NULL;
1236
1237 audio_drv_data->asic_type = *pdata;
1238
1239 res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1240 if (!res) {
1241 dev_err(&pdev->dev, "IORESOURCE_IRQ FAILED\n");
1242 return -ENODEV;
1243 }
1244
1245 status = devm_request_irq(&pdev->dev, res->start, dma_irq_handler,
1246 0, "ACP_IRQ", &pdev->dev);
1247 if (status) {
1248 dev_err(&pdev->dev, "ACP IRQ request failed\n");
1249 return status;
1250 }
1251
1252 dev_set_drvdata(&pdev->dev, audio_drv_data);
1253
1254 /* Initialize the ACP */
1255 status = acp_init(audio_drv_data->acp_mmio, audio_drv_data->asic_type);
1256 if (status) {
1257 dev_err(&pdev->dev, "ACP Init failed status:%d\n", status);
1258 return status;
1259 }
1260
1261 status = devm_snd_soc_register_component(&pdev->dev,
1262 &acp_asoc_platform, NULL, 0);
1263 if (status != 0) {
1264 dev_err(&pdev->dev, "Fail to register ALSA platform device\n");
1265 return status;
1266 }
1267
1268 pm_runtime_set_autosuspend_delay(&pdev->dev, 10000);
1269 pm_runtime_use_autosuspend(&pdev->dev);
1270 pm_runtime_enable(&pdev->dev);
1271
1272 return status;
1273 }
1274
acp_audio_remove(struct platform_device * pdev)1275 static int acp_audio_remove(struct platform_device *pdev)
1276 {
1277 int status;
1278 struct audio_drv_data *adata = dev_get_drvdata(&pdev->dev);
1279
1280 status = acp_deinit(adata->acp_mmio);
1281 if (status)
1282 dev_err(&pdev->dev, "ACP Deinit failed status:%d\n", status);
1283 pm_runtime_disable(&pdev->dev);
1284
1285 return 0;
1286 }
1287
acp_pcm_resume(struct device * dev)1288 static int acp_pcm_resume(struct device *dev)
1289 {
1290 u16 bank;
1291 int status;
1292 struct audio_substream_data *rtd;
1293 struct audio_drv_data *adata = dev_get_drvdata(dev);
1294
1295 status = acp_init(adata->acp_mmio, adata->asic_type);
1296 if (status) {
1297 dev_err(dev, "ACP Init failed status:%d\n", status);
1298 return status;
1299 }
1300
1301 if (adata->play_i2ssp_stream && adata->play_i2ssp_stream->runtime) {
1302 /*
1303 * For Stoney, Memory gating is disabled,i.e SRAM Banks
1304 * won't be turned off. The default state for SRAM banks is ON.
1305 * Setting SRAM bank state code skipped for STONEY platform.
1306 */
1307 if (adata->asic_type != CHIP_STONEY) {
1308 for (bank = 1; bank <= 4; bank++)
1309 acp_set_sram_bank_state(adata->acp_mmio, bank,
1310 true);
1311 }
1312 rtd = adata->play_i2ssp_stream->runtime->private_data;
1313 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1314 }
1315 if (adata->capture_i2ssp_stream &&
1316 adata->capture_i2ssp_stream->runtime) {
1317 if (adata->asic_type != CHIP_STONEY) {
1318 for (bank = 5; bank <= 8; bank++)
1319 acp_set_sram_bank_state(adata->acp_mmio, bank,
1320 true);
1321 }
1322 rtd = adata->capture_i2ssp_stream->runtime->private_data;
1323 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1324 }
1325 if (adata->asic_type != CHIP_CARRIZO) {
1326 if (adata->play_i2sbt_stream &&
1327 adata->play_i2sbt_stream->runtime) {
1328 rtd = adata->play_i2sbt_stream->runtime->private_data;
1329 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1330 }
1331 if (adata->capture_i2sbt_stream &&
1332 adata->capture_i2sbt_stream->runtime) {
1333 rtd = adata->capture_i2sbt_stream->runtime->private_data;
1334 config_acp_dma(adata->acp_mmio, rtd, adata->asic_type);
1335 }
1336 }
1337 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1338 return 0;
1339 }
1340
acp_pcm_runtime_suspend(struct device * dev)1341 static int acp_pcm_runtime_suspend(struct device *dev)
1342 {
1343 int status;
1344 struct audio_drv_data *adata = dev_get_drvdata(dev);
1345
1346 status = acp_deinit(adata->acp_mmio);
1347 if (status)
1348 dev_err(dev, "ACP Deinit failed status:%d\n", status);
1349 acp_reg_write(0, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1350 return 0;
1351 }
1352
acp_pcm_runtime_resume(struct device * dev)1353 static int acp_pcm_runtime_resume(struct device *dev)
1354 {
1355 int status;
1356 struct audio_drv_data *adata = dev_get_drvdata(dev);
1357
1358 status = acp_init(adata->acp_mmio, adata->asic_type);
1359 if (status) {
1360 dev_err(dev, "ACP Init failed status:%d\n", status);
1361 return status;
1362 }
1363 acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
1364 return 0;
1365 }
1366
1367 static const struct dev_pm_ops acp_pm_ops = {
1368 .resume = acp_pcm_resume,
1369 .runtime_suspend = acp_pcm_runtime_suspend,
1370 .runtime_resume = acp_pcm_runtime_resume,
1371 };
1372
1373 static struct platform_driver acp_dma_driver = {
1374 .probe = acp_audio_probe,
1375 .remove = acp_audio_remove,
1376 .driver = {
1377 .name = DRV_NAME,
1378 .pm = &acp_pm_ops,
1379 },
1380 };
1381
1382 module_platform_driver(acp_dma_driver);
1383
1384 MODULE_AUTHOR("Vijendar.Mukunda@amd.com");
1385 MODULE_AUTHOR("Maruthi.Bayyavarapu@amd.com");
1386 MODULE_DESCRIPTION("AMD ACP PCM Driver");
1387 MODULE_LICENSE("GPL v2");
1388 MODULE_ALIAS("platform:"DRV_NAME);
1389
