]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blob - sound/soc/sti/uniperif_player.c
projects / mirror_ubuntu-jammy-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
ASoC: sti: reset refactoring
[mirror_ubuntu-jammy-kernel.git] / sound / soc / sti / uniperif_player.c
1 /*
2 * Copyright (C) STMicroelectronics SA 2015
3 * Authors: Arnaud Pouliquen <arnaud.pouliquen@st.com>
4 * for STMicroelectronics.
5 * License terms: GNU General Public License (GPL), version 2
6 */
7
8 #include <linux/clk.h>
9 #include <linux/io.h>
10 #include <linux/mfd/syscon.h>
11
12 #include <sound/asoundef.h>
13 #include <sound/soc.h>
14
15 #include "uniperif.h"
16
17 /*
18 * Some hardware-related definitions
19 */
20
21 /* sys config registers definitions */
22 #define SYS_CFG_AUDIO_GLUE 0xA4
23
24 /*
25 * Driver specific types.
26 */
27
28 #define UNIPERIF_PLAYER_CLK_ADJ_MIN -999999
29 #define UNIPERIF_PLAYER_CLK_ADJ_MAX 1000000
30 #define UNIPERIF_PLAYER_I2S_OUT 1 /* player id connected to I2S/TDM TX bus */
31
32 /*
33 * Note: snd_pcm_hardware is linked to DMA controller but is declared here to
34 * integrate DAI_CPU capability in term of rate and supported channels
35 */
36 static const struct snd_pcm_hardware uni_player_pcm_hw = {
37 .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
38 SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_MMAP |
39 SNDRV_PCM_INFO_MMAP_VALID,
40 .formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE,
41
42 .rates = SNDRV_PCM_RATE_CONTINUOUS,
43 .rate_min = 8000,
44 .rate_max = 192000,
45
46 .channels_min = 2,
47 .channels_max = 8,
48
49 .periods_min = 2,
50 .periods_max = 48,
51
52 .period_bytes_min = 128,
53 .period_bytes_max = 64 * PAGE_SIZE,
54 .buffer_bytes_max = 256 * PAGE_SIZE
55 };
56
57 /*
58 * uni_player_irq_handler
59 * In case of error audio stream is stopped; stop action is protected via PCM
60 * stream lock to avoid race condition with trigger callback.
61 */
62 static irqreturn_t uni_player_irq_handler(int irq, void *dev_id)
63 {
64 irqreturn_t ret = IRQ_NONE;
65 struct uniperif *player = dev_id;
66 unsigned int status;
67 unsigned int tmp;
68
69 if (player->state == UNIPERIF_STATE_STOPPED) {
70 /* Unexpected IRQ: do nothing */
71 return IRQ_NONE;
72 }
73
74 /* Get interrupt status & clear them immediately */
75 status = GET_UNIPERIF_ITS(player);
76 SET_UNIPERIF_ITS_BCLR(player, status);
77
78 /* Check for fifo error (underrun) */
79 if (unlikely(status & UNIPERIF_ITS_FIFO_ERROR_MASK(player))) {
80 dev_err(player->dev, "FIFO underflow error detected\n");
81
82 /* Interrupt is just for information when underflow recovery */
83 if (player->underflow_enabled) {
84 /* Update state to underflow */
85 player->state = UNIPERIF_STATE_UNDERFLOW;
86
87 } else {
88 /* Disable interrupt so doesn't continually fire */
89 SET_UNIPERIF_ITM_BCLR_FIFO_ERROR(player);
90
91 /* Stop the player */
92 snd_pcm_stream_lock(player->substream);
93 snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
94 snd_pcm_stream_unlock(player->substream);
95 }
96
97 ret = IRQ_HANDLED;
98 }
99
100 /* Check for dma error (overrun) */
101 if (unlikely(status & UNIPERIF_ITS_DMA_ERROR_MASK(player))) {
102 dev_err(player->dev, "DMA error detected\n");
103
104 /* Disable interrupt so doesn't continually fire */
105 SET_UNIPERIF_ITM_BCLR_DMA_ERROR(player);
106
107 /* Stop the player */
108 snd_pcm_stream_lock(player->substream);
109 snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
110 snd_pcm_stream_unlock(player->substream);
111
112 ret = IRQ_HANDLED;
113 }
114
115 /* Check for underflow recovery done */
116 if (unlikely(status & UNIPERIF_ITM_UNDERFLOW_REC_DONE_MASK(player))) {
117 if (!player->underflow_enabled) {
118 dev_err(player->dev,
119 "unexpected Underflow recovering\n");
120 return -EPERM;
121 }
122 /* Read the underflow recovery duration */
123 tmp = GET_UNIPERIF_STATUS_1_UNDERFLOW_DURATION(player);
124 dev_dbg(player->dev, "Underflow recovered (%d LR clocks max)\n",
125 tmp);
126
127 /* Clear the underflow recovery duration */
128 SET_UNIPERIF_BIT_CONTROL_CLR_UNDERFLOW_DURATION(player);
129
130 /* Update state to started */
131 player->state = UNIPERIF_STATE_STARTED;
132
133 ret = IRQ_HANDLED;
134 }
135
136 /* Check if underflow recovery failed */
137 if (unlikely(status &
138 UNIPERIF_ITM_UNDERFLOW_REC_FAILED_MASK(player))) {
139 dev_err(player->dev, "Underflow recovery failed\n");
140
141 /* Stop the player */
142 snd_pcm_stream_lock(player->substream);
143 snd_pcm_stop(player->substream, SNDRV_PCM_STATE_XRUN);
144 snd_pcm_stream_unlock(player->substream);
145
146 ret = IRQ_HANDLED;
147 }
148
149 return ret;
150 }
151
152 static int uni_player_clk_set_rate(struct uniperif *player, unsigned long rate)
153 {
154 int rate_adjusted, rate_achieved, delta, ret;
155 int adjustment = player->clk_adj;
156
157 /*
158 * a
159 * F = f + --------- * f = f + d
160 * 1000000
161 *
162 * a
163 * d = --------- * f
164 * 1000000
165 *
166 * where:
167 * f - nominal rate
168 * a - adjustment in ppm (parts per milion)
169 * F - rate to be set in synthesizer
170 * d - delta (difference) between f and F
171 */
172 if (adjustment < 0) {
173 /* div64_64 operates on unsigned values... */
174 delta = -1;
175 adjustment = -adjustment;
176 } else {
177 delta = 1;
178 }
179 /* 500000 ppm is 0.5, which is used to round up values */
180 delta *= (int)div64_u64((uint64_t)rate *
181 (uint64_t)adjustment + 500000, 1000000);
182 rate_adjusted = rate + delta;
183
184 /* Adjusted rate should never be == 0 */
185 if (!rate_adjusted)
186 return -EINVAL;
187
188 ret = clk_set_rate(player->clk, rate_adjusted);
189 if (ret < 0)
190 return ret;
191
192 rate_achieved = clk_get_rate(player->clk);
193 if (!rate_achieved)
194 /* If value is 0 means that clock or parent not valid */
195 return -EINVAL;
196
197 /*
198 * Using ALSA's adjustment control, we can modify the rate to be up
199 * to twice as much as requested, but no more
200 */
201 delta = rate_achieved - rate;
202 if (delta < 0) {
203 /* div64_64 operates on unsigned values... */
204 delta = -delta;
205 adjustment = -1;
206 } else {
207 adjustment = 1;
208 }
209 /* Frequency/2 is added to round up result */
210 adjustment *= (int)div64_u64((uint64_t)delta * 1000000 + rate / 2,
211 rate);
212 player->clk_adj = adjustment;
213 return 0;
214 }
215
216 static void uni_player_set_channel_status(struct uniperif *player,
217 struct snd_pcm_runtime *runtime)
218 {
219 int n;
220 unsigned int status;
221
222 /*
223 * Some AVRs and TVs require the channel status to contain a correct
224 * sampling frequency. If no sample rate is already specified, then
225 * set one.
226 */
227 mutex_lock(&player->ctrl_lock);
228 if (runtime) {
229 switch (runtime->rate) {
230 case 22050:
231 player->stream_settings.iec958.status[3] =
232 IEC958_AES3_CON_FS_22050;
233 break;
234 case 44100:
235 player->stream_settings.iec958.status[3] =
236 IEC958_AES3_CON_FS_44100;
237 break;
238 case 88200:
239 player->stream_settings.iec958.status[3] =
240 IEC958_AES3_CON_FS_88200;
241 break;
242 case 176400:
243 player->stream_settings.iec958.status[3] =
244 IEC958_AES3_CON_FS_176400;
245 break;
246 case 24000:
247 player->stream_settings.iec958.status[3] =
248 IEC958_AES3_CON_FS_24000;
249 break;
250 case 48000:
251 player->stream_settings.iec958.status[3] =
252 IEC958_AES3_CON_FS_48000;
253 break;
254 case 96000:
255 player->stream_settings.iec958.status[3] =
256 IEC958_AES3_CON_FS_96000;
257 break;
258 case 192000:
259 player->stream_settings.iec958.status[3] =
260 IEC958_AES3_CON_FS_192000;
261 break;
262 case 32000:
263 player->stream_settings.iec958.status[3] =
264 IEC958_AES3_CON_FS_32000;
265 break;
266 default:
267 /* Mark as sampling frequency not indicated */
268 player->stream_settings.iec958.status[3] =
269 IEC958_AES3_CON_FS_NOTID;
270 break;
271 }
272 }
273
274 /* Audio mode:
275 * Use audio mode status to select PCM or encoded mode
276 */
277 if (player->stream_settings.iec958.status[0] & IEC958_AES0_NONAUDIO)
278 player->stream_settings.encoding_mode =
279 UNIPERIF_IEC958_ENCODING_MODE_ENCODED;
280 else
281 player->stream_settings.encoding_mode =
282 UNIPERIF_IEC958_ENCODING_MODE_PCM;
283
284 if (player->stream_settings.encoding_mode ==
285 UNIPERIF_IEC958_ENCODING_MODE_PCM)
286 /* Clear user validity bits */
287 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
288 else
289 /* Set user validity bits */
290 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 1);
291
292 /* Program the new channel status */
293 for (n = 0; n < 6; ++n) {
294 status =
295 player->stream_settings.iec958.status[0 + (n * 4)] & 0xf;
296 status |=
297 player->stream_settings.iec958.status[1 + (n * 4)] << 8;
298 status |=
299 player->stream_settings.iec958.status[2 + (n * 4)] << 16;
300 status |=
301 player->stream_settings.iec958.status[3 + (n * 4)] << 24;
302 SET_UNIPERIF_CHANNEL_STA_REGN(player, n, status);
303 }
304 mutex_unlock(&player->ctrl_lock);
305
306 /* Update the channel status */
307 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
308 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
309 else
310 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
311 }
312
313 static int uni_player_prepare_iec958(struct uniperif *player,
314 struct snd_pcm_runtime *runtime)
315 {
316 int clk_div;
317
318 clk_div = player->mclk / runtime->rate;
319
320 /* Oversampling must be multiple of 128 as iec958 frame is 32-bits */
321 if ((clk_div % 128) || (clk_div <= 0)) {
322 dev_err(player->dev, "%s: invalid clk_div %d\n",
323 __func__, clk_div);
324 return -EINVAL;
325 }
326
327 switch (runtime->format) {
328 case SNDRV_PCM_FORMAT_S16_LE:
329 /* 16/16 memory format */
330 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
331 /* 16-bits per sub-frame */
332 SET_UNIPERIF_I2S_FMT_NBIT_32(player);
333 /* Set 16-bit sample precision */
334 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
335 break;
336 case SNDRV_PCM_FORMAT_S32_LE:
337 /* 16/0 memory format */
338 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
339 /* 32-bits per sub-frame */
340 SET_UNIPERIF_I2S_FMT_NBIT_32(player);
341 /* Set 24-bit sample precision */
342 SET_UNIPERIF_I2S_FMT_DATA_SIZE_24(player);
343 break;
344 default:
345 dev_err(player->dev, "format not supported\n");
346 return -EINVAL;
347 }
348
349 /* Set parity to be calculated by the hardware */
350 SET_UNIPERIF_CONFIG_PARITY_CNTR_BY_HW(player);
351
352 /* Set channel status bits to be inserted by the hardware */
353 SET_UNIPERIF_CONFIG_CHANNEL_STA_CNTR_BY_HW(player);
354
355 /* Set user data bits to be inserted by the hardware */
356 SET_UNIPERIF_CONFIG_USER_DAT_CNTR_BY_HW(player);
357
358 /* Set validity bits to be inserted by the hardware */
359 SET_UNIPERIF_CONFIG_VALIDITY_DAT_CNTR_BY_HW(player);
360
361 /* Set full software control to disabled */
362 SET_UNIPERIF_CONFIG_SPDIF_SW_CTRL_DISABLE(player);
363
364 SET_UNIPERIF_CTRL_ZERO_STUFF_HW(player);
365
366 /* Update the channel status */
367 uni_player_set_channel_status(player, runtime);
368
369 /* Clear the user validity user bits */
370 SET_UNIPERIF_USER_VALIDITY_VALIDITY_LR(player, 0);
371
372 /* Disable one-bit audio mode */
373 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
374
375 /* Enable consecutive frames repetition of Z preamble (not for HBRA) */
376 SET_UNIPERIF_CONFIG_REPEAT_CHL_STS_ENABLE(player);
377
378 /* Change to SUF0_SUBF1 and left/right channels swap! */
379 SET_UNIPERIF_CONFIG_SUBFRAME_SEL_SUBF1_SUBF0(player);
380
381 /* Set data output as MSB first */
382 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
383
384 if (player->stream_settings.encoding_mode ==
385 UNIPERIF_IEC958_ENCODING_MODE_ENCODED)
386 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_ON(player);
387 else
388 SET_UNIPERIF_CTRL_EXIT_STBY_ON_EOBLOCK_OFF(player);
389
390 SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
391
392 /* Set rounding to off */
393 SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
394
395 /* Set clock divisor */
396 SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / 128);
397
398 /* Set the spdif latency to not wait before starting player */
399 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
400
401 /*
402 * Ensure iec958 formatting is off. It will be enabled in function
403 * uni_player_start() at the same time as the operation
404 * mode is set to work around a silicon issue.
405 */
406 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
407 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
408 else
409 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
410
411 return 0;
412 }
413
414 static int uni_player_prepare_pcm(struct uniperif *player,
415 struct snd_pcm_runtime *runtime)
416 {
417 int output_frame_size, slot_width, clk_div;
418
419 /* Force slot width to 32 in I2S mode (HW constraint) */
420 if ((player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) ==
421 SND_SOC_DAIFMT_I2S)
422 slot_width = 32;
423 else
424 slot_width = snd_pcm_format_width(runtime->format);
425
426 output_frame_size = slot_width * runtime->channels;
427
428 clk_div = player->mclk / runtime->rate;
429 /*
430 * For 32 bits subframe clk_div must be a multiple of 128,
431 * for 16 bits must be a multiple of 64
432 */
433 if ((slot_width == 32) && (clk_div % 128)) {
434 dev_err(player->dev, "%s: invalid clk_div\n", __func__);
435 return -EINVAL;
436 }
437
438 if ((slot_width == 16) && (clk_div % 64)) {
439 dev_err(player->dev, "%s: invalid clk_div\n", __func__);
440 return -EINVAL;
441 }
442
443 /*
444 * Number of bits per subframe (which is one channel sample)
445 * on output - Transfer 16 or 32 bits from FIFO
446 */
447 switch (slot_width) {
448 case 32:
449 SET_UNIPERIF_I2S_FMT_NBIT_32(player);
450 SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
451 break;
452 case 16:
453 SET_UNIPERIF_I2S_FMT_NBIT_16(player);
454 SET_UNIPERIF_I2S_FMT_DATA_SIZE_16(player);
455 break;
456 default:
457 dev_err(player->dev, "subframe format not supported\n");
458 return -EINVAL;
459 }
460
461 /* Configure data memory format */
462 switch (runtime->format) {
463 case SNDRV_PCM_FORMAT_S16_LE:
464 /* One data word contains two samples */
465 SET_UNIPERIF_CONFIG_MEM_FMT_16_16(player);
466 break;
467
468 case SNDRV_PCM_FORMAT_S32_LE:
469 /*
470 * Actually "16 bits/0 bits" means "32/28/24/20/18/16 bits
471 * on the left than zeros (if less than 32 bytes)"... ;-)
472 */
473 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
474 break;
475
476 default:
477 dev_err(player->dev, "format not supported\n");
478 return -EINVAL;
479 }
480
481 /* Set rounding to off */
482 SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
483
484 /* Set clock divisor */
485 SET_UNIPERIF_CTRL_DIVIDER(player, clk_div / (2 * output_frame_size));
486
487 /* Number of channelsmust be even*/
488 if ((runtime->channels % 2) || (runtime->channels < 2) ||
489 (runtime->channels > 10)) {
490 dev_err(player->dev, "%s: invalid nb of channels\n", __func__);
491 return -EINVAL;
492 }
493
494 SET_UNIPERIF_I2S_FMT_NUM_CH(player, runtime->channels / 2);
495
496 /* Set 1-bit audio format to disabled */
497 SET_UNIPERIF_CONFIG_ONE_BIT_AUD_DISABLE(player);
498
499 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
500
501 /* No iec958 formatting as outputting to DAC */
502 SET_UNIPERIF_CTRL_SPDIF_FMT_OFF(player);
503
504 return 0;
505 }
506
507 static int uni_player_prepare_tdm(struct uniperif *player,
508 struct snd_pcm_runtime *runtime)
509 {
510 int tdm_frame_size; /* unip tdm frame size in bytes */
511 int user_frame_size; /* user tdm frame size in bytes */
512 /* default unip TDM_WORD_POS_X_Y */
513 unsigned int word_pos[4] = {
514 0x04060002, 0x0C0E080A, 0x14161012, 0x1C1E181A};
515 int freq, ret;
516
517 tdm_frame_size =
518 sti_uniperiph_get_unip_tdm_frame_size(player);
519 user_frame_size =
520 sti_uniperiph_get_user_frame_size(runtime);
521
522 /* fix 16/0 format */
523 SET_UNIPERIF_CONFIG_MEM_FMT_16_0(player);
524 SET_UNIPERIF_I2S_FMT_DATA_SIZE_32(player);
525
526 /* number of words inserted on the TDM line */
527 SET_UNIPERIF_I2S_FMT_NUM_CH(player, user_frame_size / 4 / 2);
528
529 SET_UNIPERIF_I2S_FMT_ORDER_MSB(player);
530 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
531
532 /* Enable the tdm functionality */
533 SET_UNIPERIF_TDM_ENABLE_TDM_ENABLE(player);
534
535 /* number of 8 bits timeslots avail in unip tdm frame */
536 SET_UNIPERIF_TDM_FS_REF_DIV_NUM_TIMESLOT(player, tdm_frame_size);
537
538 /* set the timeslot allocation for words in FIFO */
539 sti_uniperiph_get_tdm_word_pos(player, word_pos);
540 SET_UNIPERIF_TDM_WORD_POS(player, 1_2, word_pos[WORD_1_2]);
541 SET_UNIPERIF_TDM_WORD_POS(player, 3_4, word_pos[WORD_3_4]);
542 SET_UNIPERIF_TDM_WORD_POS(player, 5_6, word_pos[WORD_5_6]);
543 SET_UNIPERIF_TDM_WORD_POS(player, 7_8, word_pos[WORD_7_8]);
544
545 /* set unip clk rate (not done vai set_sysclk ops) */
546 freq = runtime->rate * tdm_frame_size * 8;
547 mutex_lock(&player->ctrl_lock);
548 ret = uni_player_clk_set_rate(player, freq);
549 if (!ret)
550 player->mclk = freq;
551 mutex_unlock(&player->ctrl_lock);
552
553 return 0;
554 }
555
556 /*
557 * ALSA uniperipheral iec958 controls
558 */
559 static int uni_player_ctl_iec958_info(struct snd_kcontrol *kcontrol,
560 struct snd_ctl_elem_info *uinfo)
561 {
562 uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
563 uinfo->count = 1;
564
565 return 0;
566 }
567
568 static int uni_player_ctl_iec958_get(struct snd_kcontrol *kcontrol,
569 struct snd_ctl_elem_value *ucontrol)
570 {
571 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
572 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
573 struct uniperif *player = priv->dai_data.uni;
574 struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
575
576 mutex_lock(&player->ctrl_lock);
577 ucontrol->value.iec958.status[0] = iec958->status[0];
578 ucontrol->value.iec958.status[1] = iec958->status[1];
579 ucontrol->value.iec958.status[2] = iec958->status[2];
580 ucontrol->value.iec958.status[3] = iec958->status[3];
581 mutex_unlock(&player->ctrl_lock);
582 return 0;
583 }
584
585 static int uni_player_ctl_iec958_put(struct snd_kcontrol *kcontrol,
586 struct snd_ctl_elem_value *ucontrol)
587 {
588 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
589 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
590 struct uniperif *player = priv->dai_data.uni;
591 struct snd_aes_iec958 *iec958 = &player->stream_settings.iec958;
592
593 mutex_lock(&player->ctrl_lock);
594 iec958->status[0] = ucontrol->value.iec958.status[0];
595 iec958->status[1] = ucontrol->value.iec958.status[1];
596 iec958->status[2] = ucontrol->value.iec958.status[2];
597 iec958->status[3] = ucontrol->value.iec958.status[3];
598 mutex_unlock(&player->ctrl_lock);
599
600 uni_player_set_channel_status(player, NULL);
601
602 return 0;
603 }
604
605 static struct snd_kcontrol_new uni_player_iec958_ctl = {
606 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
607 .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
608 .info = uni_player_ctl_iec958_info,
609 .get = uni_player_ctl_iec958_get,
610 .put = uni_player_ctl_iec958_put,
611 };
612
613 /*
614 * uniperif rate adjustement control
615 */
616 static int snd_sti_clk_adjustment_info(struct snd_kcontrol *kcontrol,
617 struct snd_ctl_elem_info *uinfo)
618 {
619 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
620 uinfo->count = 1;
621 uinfo->value.integer.min = UNIPERIF_PLAYER_CLK_ADJ_MIN;
622 uinfo->value.integer.max = UNIPERIF_PLAYER_CLK_ADJ_MAX;
623 uinfo->value.integer.step = 1;
624
625 return 0;
626 }
627
628 static int snd_sti_clk_adjustment_get(struct snd_kcontrol *kcontrol,
629 struct snd_ctl_elem_value *ucontrol)
630 {
631 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
632 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
633 struct uniperif *player = priv->dai_data.uni;
634
635 mutex_lock(&player->ctrl_lock);
636 ucontrol->value.integer.value[0] = player->clk_adj;
637 mutex_unlock(&player->ctrl_lock);
638
639 return 0;
640 }
641
642 static int snd_sti_clk_adjustment_put(struct snd_kcontrol *kcontrol,
643 struct snd_ctl_elem_value *ucontrol)
644 {
645 struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
646 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
647 struct uniperif *player = priv->dai_data.uni;
648 int ret = 0;
649
650 if ((ucontrol->value.integer.value[0] < UNIPERIF_PLAYER_CLK_ADJ_MIN) ||
651 (ucontrol->value.integer.value[0] > UNIPERIF_PLAYER_CLK_ADJ_MAX))
652 return -EINVAL;
653
654 mutex_lock(&player->ctrl_lock);
655 player->clk_adj = ucontrol->value.integer.value[0];
656
657 if (player->mclk)
658 ret = uni_player_clk_set_rate(player, player->mclk);
659 mutex_unlock(&player->ctrl_lock);
660
661 return ret;
662 }
663
664 static struct snd_kcontrol_new uni_player_clk_adj_ctl = {
665 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
666 .name = "PCM Playback Oversampling Freq. Adjustment",
667 .info = snd_sti_clk_adjustment_info,
668 .get = snd_sti_clk_adjustment_get,
669 .put = snd_sti_clk_adjustment_put,
670 };
671
672 static struct snd_kcontrol_new *snd_sti_pcm_ctl[] = {
673 &uni_player_clk_adj_ctl,
674 };
675
676 static struct snd_kcontrol_new *snd_sti_iec_ctl[] = {
677 &uni_player_iec958_ctl,
678 &uni_player_clk_adj_ctl,
679 };
680
681 static int uni_player_startup(struct snd_pcm_substream *substream,
682 struct snd_soc_dai *dai)
683 {
684 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
685 struct uniperif *player = priv->dai_data.uni;
686 int ret;
687
688 player->substream = substream;
689
690 player->clk_adj = 0;
691
692 if (!UNIPERIF_TYPE_IS_TDM(player))
693 return 0;
694
695 /* refine hw constraint in tdm mode */
696 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
697 SNDRV_PCM_HW_PARAM_CHANNELS,
698 sti_uniperiph_fix_tdm_chan,
699 player, SNDRV_PCM_HW_PARAM_CHANNELS,
700 -1);
701 if (ret < 0)
702 return ret;
703
704 return snd_pcm_hw_rule_add(substream->runtime, 0,
705 SNDRV_PCM_HW_PARAM_FORMAT,
706 sti_uniperiph_fix_tdm_format,
707 player, SNDRV_PCM_HW_PARAM_FORMAT,
708 -1);
709 }
710
711 static int uni_player_set_sysclk(struct snd_soc_dai *dai, int clk_id,
712 unsigned int freq, int dir)
713 {
714 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
715 struct uniperif *player = priv->dai_data.uni;
716 int ret;
717
718 if (UNIPERIF_TYPE_IS_TDM(player) || (dir == SND_SOC_CLOCK_IN))
719 return 0;
720
721 if (clk_id != 0)
722 return -EINVAL;
723
724 mutex_lock(&player->ctrl_lock);
725 ret = uni_player_clk_set_rate(player, freq);
726 if (!ret)
727 player->mclk = freq;
728 mutex_unlock(&player->ctrl_lock);
729
730 return ret;
731 }
732
733 static int uni_player_prepare(struct snd_pcm_substream *substream,
734 struct snd_soc_dai *dai)
735 {
736 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
737 struct uniperif *player = priv->dai_data.uni;
738 struct snd_pcm_runtime *runtime = substream->runtime;
739 int transfer_size, trigger_limit;
740 int ret;
741
742 /* The player should be stopped */
743 if (player->state != UNIPERIF_STATE_STOPPED) {
744 dev_err(player->dev, "%s: invalid player state %d\n", __func__,
745 player->state);
746 return -EINVAL;
747 }
748
749 /* Calculate transfer size (in fifo cells and bytes) for frame count */
750 if (player->type == SND_ST_UNIPERIF_TYPE_TDM) {
751 /* transfer size = user frame size (in 32 bits FIFO cell) */
752 transfer_size =
753 sti_uniperiph_get_user_frame_size(runtime) / 4;
754 } else {
755 transfer_size = runtime->channels * UNIPERIF_FIFO_FRAMES;
756 }
757
758 /* Calculate number of empty cells available before asserting DREQ */
759 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0) {
760 trigger_limit = UNIPERIF_FIFO_SIZE - transfer_size;
761 } else {
762 /*
763 * Since SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0
764 * FDMA_TRIGGER_LIMIT also controls when the state switches
765 * from OFF or STANDBY to AUDIO DATA.
766 */
767 trigger_limit = transfer_size;
768 }
769
770 /* Trigger limit must be an even number */
771 if ((!trigger_limit % 2) || (trigger_limit != 1 && transfer_size % 2) ||
772 (trigger_limit > UNIPERIF_CONFIG_DMA_TRIG_LIMIT_MASK(player))) {
773 dev_err(player->dev, "invalid trigger limit %d\n",
774 trigger_limit);
775 return -EINVAL;
776 }
777
778 SET_UNIPERIF_CONFIG_DMA_TRIG_LIMIT(player, trigger_limit);
779
780 /* Uniperipheral setup depends on player type */
781 switch (player->type) {
782 case SND_ST_UNIPERIF_TYPE_HDMI:
783 ret = uni_player_prepare_iec958(player, runtime);
784 break;
785 case SND_ST_UNIPERIF_TYPE_PCM:
786 ret = uni_player_prepare_pcm(player, runtime);
787 break;
788 case SND_ST_UNIPERIF_TYPE_SPDIF:
789 ret = uni_player_prepare_iec958(player, runtime);
790 break;
791 case SND_ST_UNIPERIF_TYPE_TDM:
792 ret = uni_player_prepare_tdm(player, runtime);
793 break;
794 default:
795 dev_err(player->dev, "invalid player type\n");
796 return -EINVAL;
797 }
798
799 if (ret)
800 return ret;
801
802 switch (player->daifmt & SND_SOC_DAIFMT_INV_MASK) {
803 case SND_SOC_DAIFMT_NB_NF:
804 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
805 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
806 break;
807 case SND_SOC_DAIFMT_NB_IF:
808 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
809 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_RISING(player);
810 break;
811 case SND_SOC_DAIFMT_IB_NF:
812 SET_UNIPERIF_I2S_FMT_LR_POL_LOW(player);
813 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
814 break;
815 case SND_SOC_DAIFMT_IB_IF:
816 SET_UNIPERIF_I2S_FMT_LR_POL_HIG(player);
817 SET_UNIPERIF_I2S_FMT_SCLK_EDGE_FALLING(player);
818 break;
819 }
820
821 switch (player->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
822 case SND_SOC_DAIFMT_I2S:
823 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
824 SET_UNIPERIF_I2S_FMT_PADDING_I2S_MODE(player);
825 break;
826 case SND_SOC_DAIFMT_LEFT_J:
827 SET_UNIPERIF_I2S_FMT_ALIGN_LEFT(player);
828 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
829 break;
830 case SND_SOC_DAIFMT_RIGHT_J:
831 SET_UNIPERIF_I2S_FMT_ALIGN_RIGHT(player);
832 SET_UNIPERIF_I2S_FMT_PADDING_SONY_MODE(player);
833 break;
834 default:
835 dev_err(player->dev, "format not supported\n");
836 return -EINVAL;
837 }
838
839 SET_UNIPERIF_I2S_FMT_NO_OF_SAMPLES_TO_READ(player, 0);
840
841
842 return sti_uniperiph_reset(player);
843 }
844
845 static int uni_player_start(struct uniperif *player)
846 {
847 int ret;
848
849 /* The player should be stopped */
850 if (player->state != UNIPERIF_STATE_STOPPED) {
851 dev_err(player->dev, "%s: invalid player state\n", __func__);
852 return -EINVAL;
853 }
854
855 ret = clk_prepare_enable(player->clk);
856 if (ret) {
857 dev_err(player->dev, "%s: Failed to enable clock\n", __func__);
858 return ret;
859 }
860
861 /* Clear any pending interrupts */
862 SET_UNIPERIF_ITS_BCLR(player, GET_UNIPERIF_ITS(player));
863
864 /* Set the interrupt mask */
865 SET_UNIPERIF_ITM_BSET_DMA_ERROR(player);
866 SET_UNIPERIF_ITM_BSET_FIFO_ERROR(player);
867
868 /* Enable underflow recovery interrupts */
869 if (player->underflow_enabled) {
870 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_DONE(player);
871 SET_UNIPERIF_ITM_BSET_UNDERFLOW_REC_FAILED(player);
872 }
873
874 ret = sti_uniperiph_reset(player);
875 if (ret < 0) {
876 clk_disable_unprepare(player->clk);
877 return ret;
878 }
879
880 /*
881 * Does not use IEC61937 features of the uniperipheral hardware.
882 * Instead it performs IEC61937 in software and inserts it directly
883 * into the audio data stream. As such, when encoded mode is selected,
884 * linear pcm mode is still used, but with the differences of the
885 * channel status bits set for encoded mode and the validity bits set.
886 */
887 SET_UNIPERIF_CTRL_OPERATION_PCM_DATA(player);
888
889 /*
890 * If iec958 formatting is required for hdmi or spdif, then it must be
891 * enabled after the operation mode is set. If set prior to this, it
892 * will not take affect and hang the player.
893 */
894 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
895 if (UNIPERIF_TYPE_IS_IEC958(player))
896 SET_UNIPERIF_CTRL_SPDIF_FMT_ON(player);
897
898 /* Force channel status update (no update if clk disable) */
899 if (player->ver < SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
900 SET_UNIPERIF_CONFIG_CHL_STS_UPDATE(player);
901 else
902 SET_UNIPERIF_BIT_CONTROL_CHL_STS_UPDATE(player);
903
904 /* Update state to started */
905 player->state = UNIPERIF_STATE_STARTED;
906
907 return 0;
908 }
909
910 static int uni_player_stop(struct uniperif *player)
911 {
912 int ret;
913
914 /* The player should not be in stopped state */
915 if (player->state == UNIPERIF_STATE_STOPPED) {
916 dev_err(player->dev, "%s: invalid player state\n", __func__);
917 return -EINVAL;
918 }
919
920 /* Turn the player off */
921 SET_UNIPERIF_CTRL_OPERATION_OFF(player);
922
923 ret = sti_uniperiph_reset(player);
924 if (ret < 0)
925 return ret;
926
927 /* Disable interrupts */
928 SET_UNIPERIF_ITM_BCLR(player, GET_UNIPERIF_ITM(player));
929
930 /* Disable clock */
931 clk_disable_unprepare(player->clk);
932
933 /* Update state to stopped and return */
934 player->state = UNIPERIF_STATE_STOPPED;
935
936 return 0;
937 }
938
939 int uni_player_resume(struct uniperif *player)
940 {
941 int ret;
942
943 /* Select the frequency synthesizer clock */
944 if (player->clk_sel) {
945 ret = regmap_field_write(player->clk_sel, 1);
946 if (ret) {
947 dev_err(player->dev,
948 "%s: Failed to select freq synth clock\n",
949 __func__);
950 return ret;
951 }
952 }
953
954 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
955 SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
956 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
957 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
958
959 return 0;
960 }
961 EXPORT_SYMBOL_GPL(uni_player_resume);
962
963 static int uni_player_trigger(struct snd_pcm_substream *substream,
964 int cmd, struct snd_soc_dai *dai)
965 {
966 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
967 struct uniperif *player = priv->dai_data.uni;
968
969 switch (cmd) {
970 case SNDRV_PCM_TRIGGER_START:
971 return uni_player_start(player);
972 case SNDRV_PCM_TRIGGER_STOP:
973 return uni_player_stop(player);
974 case SNDRV_PCM_TRIGGER_RESUME:
975 return uni_player_resume(player);
976 default:
977 return -EINVAL;
978 }
979 }
980
981 static void uni_player_shutdown(struct snd_pcm_substream *substream,
982 struct snd_soc_dai *dai)
983 {
984 struct sti_uniperiph_data *priv = snd_soc_dai_get_drvdata(dai);
985 struct uniperif *player = priv->dai_data.uni;
986
987 if (player->state != UNIPERIF_STATE_STOPPED)
988 /* Stop the player */
989 uni_player_stop(player);
990
991 player->substream = NULL;
992 }
993
994 static int uni_player_parse_dt_audio_glue(struct platform_device *pdev,
995 struct uniperif *player)
996 {
997 struct device_node *node = pdev->dev.of_node;
998 struct regmap *regmap;
999 struct reg_field regfield[2] = {
1000 /* PCM_CLK_SEL */
1001 REG_FIELD(SYS_CFG_AUDIO_GLUE,
1002 8 + player->id,
1003 8 + player->id),
1004 /* PCMP_VALID_SEL */
1005 REG_FIELD(SYS_CFG_AUDIO_GLUE, 0, 1)
1006 };
1007
1008 regmap = syscon_regmap_lookup_by_phandle(node, "st,syscfg");
1009
1010 if (IS_ERR(regmap)) {
1011 dev_err(&pdev->dev, "sti-audio-clk-glue syscf not found\n");
1012 return PTR_ERR(regmap);
1013 }
1014
1015 player->clk_sel = regmap_field_alloc(regmap, regfield[0]);
1016 player->valid_sel = regmap_field_alloc(regmap, regfield[1]);
1017
1018 return 0;
1019 }
1020
1021 static const struct snd_soc_dai_ops uni_player_dai_ops = {
1022 .startup = uni_player_startup,
1023 .shutdown = uni_player_shutdown,
1024 .prepare = uni_player_prepare,
1025 .trigger = uni_player_trigger,
1026 .hw_params = sti_uniperiph_dai_hw_params,
1027 .set_fmt = sti_uniperiph_dai_set_fmt,
1028 .set_sysclk = uni_player_set_sysclk,
1029 .set_tdm_slot = sti_uniperiph_set_tdm_slot
1030 };
1031
1032 int uni_player_init(struct platform_device *pdev,
1033 struct uniperif *player)
1034 {
1035 int ret = 0;
1036
1037 player->dev = &pdev->dev;
1038 player->state = UNIPERIF_STATE_STOPPED;
1039 player->dai_ops = &uni_player_dai_ops;
1040
1041 /* Get PCM_CLK_SEL & PCMP_VALID_SEL from audio-glue-ctrl SoC reg */
1042 ret = uni_player_parse_dt_audio_glue(pdev, player);
1043
1044 if (ret < 0) {
1045 dev_err(player->dev, "Failed to parse DeviceTree\n");
1046 return ret;
1047 }
1048
1049 /* Underflow recovery is only supported on later ip revisions */
1050 if (player->ver >= SND_ST_UNIPERIF_VERSION_UNI_PLR_TOP_1_0)
1051 player->underflow_enabled = 1;
1052
1053 if (UNIPERIF_TYPE_IS_TDM(player))
1054 player->hw = &uni_tdm_hw;
1055 else
1056 player->hw = &uni_player_pcm_hw;
1057
1058 /* Get uniperif resource */
1059 player->clk = of_clk_get(pdev->dev.of_node, 0);
1060 if (IS_ERR(player->clk)) {
1061 dev_err(player->dev, "Failed to get clock\n");
1062 ret = PTR_ERR(player->clk);
1063 }
1064
1065 /* Select the frequency synthesizer clock */
1066 if (player->clk_sel) {
1067 ret = regmap_field_write(player->clk_sel, 1);
1068 if (ret) {
1069 dev_err(player->dev,
1070 "%s: Failed to select freq synth clock\n",
1071 __func__);
1072 return ret;
1073 }
1074 }
1075
1076 /* connect to I2S/TDM TX bus */
1077 if (player->valid_sel &&
1078 (player->id == UNIPERIF_PLAYER_I2S_OUT)) {
1079 ret = regmap_field_write(player->valid_sel, player->id);
1080 if (ret) {
1081 dev_err(player->dev,
1082 "%s: unable to connect to tdm bus\n", __func__);
1083 return ret;
1084 }
1085 }
1086
1087 ret = devm_request_irq(&pdev->dev, player->irq,
1088 uni_player_irq_handler, IRQF_SHARED,
1089 dev_name(&pdev->dev), player);
1090 if (ret < 0) {
1091 dev_err(player->dev, "unable to request IRQ %d\n", player->irq);
1092 return ret;
1093 }
1094
1095 mutex_init(&player->ctrl_lock);
1096
1097 /* Ensure that disabled by default */
1098 SET_UNIPERIF_CONFIG_BACK_STALL_REQ_DISABLE(player);
1099 SET_UNIPERIF_CTRL_ROUNDING_OFF(player);
1100 SET_UNIPERIF_CTRL_SPDIF_LAT_OFF(player);
1101 SET_UNIPERIF_CONFIG_IDLE_MOD_DISABLE(player);
1102
1103 if (UNIPERIF_TYPE_IS_IEC958(player)) {
1104 /* Set default iec958 status bits */
1105
1106 /* Consumer, PCM, copyright, 2ch, mode 0 */
1107 player->stream_settings.iec958.status[0] = 0x00;
1108 /* Broadcast reception category */
1109 player->stream_settings.iec958.status[1] =
1110 IEC958_AES1_CON_GENERAL;
1111 /* Do not take into account source or channel number */
1112 player->stream_settings.iec958.status[2] =
1113 IEC958_AES2_CON_SOURCE_UNSPEC;
1114 /* Sampling frequency not indicated */
1115 player->stream_settings.iec958.status[3] =
1116 IEC958_AES3_CON_FS_NOTID;
1117 /* Max sample word 24-bit, sample word length not indicated */
1118 player->stream_settings.iec958.status[4] =
1119 IEC958_AES4_CON_MAX_WORDLEN_24 |
1120 IEC958_AES4_CON_WORDLEN_24_20;
1121
1122 player->num_ctrls = ARRAY_SIZE(snd_sti_iec_ctl);
1123 player->snd_ctrls = snd_sti_iec_ctl[0];
1124 } else {
1125 player->num_ctrls = ARRAY_SIZE(snd_sti_pcm_ctl);
1126 player->snd_ctrls = snd_sti_pcm_ctl[0];
1127 }
1128
1129 return 0;
1130 }
1131 EXPORT_SYMBOL_GPL(uni_player_init);
Ubuntu Jammy Linux kernel mirror