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Linux/sound/soc/ux500/ux500_msp_dai.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  * Copyright (C) ST-Ericsson SA 2012
  4  *
  5  * Author: Ola Lilja <ola.o.lilja@stericsson.com>,
  6  *         Roger Nilsson <roger.xr.nilsson@stericsson.com>
  7  *         for ST-Ericsson.
  8  *
  9  * License terms:
 10  */
 11 
 12 #include <linux/module.h>
 13 #include <linux/slab.h>
 14 #include <linux/bitops.h>
 15 #include <linux/platform_device.h>
 16 #include <linux/clk.h>
 17 #include <linux/of.h>
 18 #include <linux/regulator/consumer.h>
 19 #include <linux/mfd/dbx500-prcmu.h>
 20 #include <linux/platform_data/asoc-ux500-msp.h>
 21 
 22 #include <sound/soc.h>
 23 #include <sound/soc-dai.h>
 24 #include <sound/dmaengine_pcm.h>
 25 
 26 #include "ux500_msp_i2s.h"
 27 #include "ux500_msp_dai.h"
 28 #include "ux500_pcm.h"
 29 
 30 static int setup_pcm_multichan(struct snd_soc_dai *dai,
 31                         struct ux500_msp_config *msp_config)
 32 {
 33         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
 34         struct msp_multichannel_config *multi =
 35                                         &msp_config->multichannel_config;
 36 
 37         if (drvdata->slots > 1) {
 38                 msp_config->multichannel_configured = 1;
 39 
 40                 multi->tx_multichannel_enable = true;
 41                 multi->rx_multichannel_enable = true;
 42                 multi->rx_comparison_enable_mode = MSP_COMPARISON_DISABLED;
 43 
 44                 multi->tx_channel_0_enable = drvdata->tx_mask;
 45                 multi->tx_channel_1_enable = 0;
 46                 multi->tx_channel_2_enable = 0;
 47                 multi->tx_channel_3_enable = 0;
 48 
 49                 multi->rx_channel_0_enable = drvdata->rx_mask;
 50                 multi->rx_channel_1_enable = 0;
 51                 multi->rx_channel_2_enable = 0;
 52                 multi->rx_channel_3_enable = 0;
 53 
 54                 dev_dbg(dai->dev,
 55                         "%s: Multichannel enabled. Slots: %d, TX: %u, RX: %u\n",
 56                         __func__, drvdata->slots, multi->tx_channel_0_enable,
 57                         multi->rx_channel_0_enable);
 58         }
 59 
 60         return 0;
 61 }
 62 
 63 static int setup_frameper(struct snd_soc_dai *dai, unsigned int rate,
 64                         struct msp_protdesc *prot_desc)
 65 {
 66         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
 67 
 68         switch (drvdata->slots) {
 69         case 1:
 70                 switch (rate) {
 71                 case 8000:
 72                         prot_desc->frame_period =
 73                                 FRAME_PER_SINGLE_SLOT_8_KHZ;
 74                         break;
 75 
 76                 case 16000:
 77                         prot_desc->frame_period =
 78                                 FRAME_PER_SINGLE_SLOT_16_KHZ;
 79                         break;
 80 
 81                 case 44100:
 82                         prot_desc->frame_period =
 83                                 FRAME_PER_SINGLE_SLOT_44_1_KHZ;
 84                         break;
 85 
 86                 case 48000:
 87                         prot_desc->frame_period =
 88                                 FRAME_PER_SINGLE_SLOT_48_KHZ;
 89                         break;
 90 
 91                 default:
 92                         dev_err(dai->dev,
 93                                 "%s: Error: Unsupported sample-rate (freq = %d)!\n",
 94                                 __func__, rate);
 95                         return -EINVAL;
 96                 }
 97                 break;
 98 
 99         case 2:
100                 prot_desc->frame_period = FRAME_PER_2_SLOTS;
101                 break;
102 
103         case 8:
104                 prot_desc->frame_period = FRAME_PER_8_SLOTS;
105                 break;
106 
107         case 16:
108                 prot_desc->frame_period = FRAME_PER_16_SLOTS;
109                 break;
110         default:
111                 dev_err(dai->dev,
112                         "%s: Error: Unsupported slot-count (slots = %d)!\n",
113                         __func__, drvdata->slots);
114                 return -EINVAL;
115         }
116 
117         prot_desc->clocks_per_frame =
118                         prot_desc->frame_period+1;
119 
120         dev_dbg(dai->dev, "%s: Clocks per frame: %u\n",
121                 __func__,
122                 prot_desc->clocks_per_frame);
123 
124         return 0;
125 }
126 
127 static int setup_pcm_framing(struct snd_soc_dai *dai, unsigned int rate,
128                         struct msp_protdesc *prot_desc)
129 {
130         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
131 
132         u32 frame_length = MSP_FRAME_LEN_1;
133 
134         prot_desc->frame_width = 0;
135 
136         switch (drvdata->slots) {
137         case 1:
138                 frame_length = MSP_FRAME_LEN_1;
139                 break;
140 
141         case 2:
142                 frame_length = MSP_FRAME_LEN_2;
143                 break;
144 
145         case 8:
146                 frame_length = MSP_FRAME_LEN_8;
147                 break;
148 
149         case 16:
150                 frame_length = MSP_FRAME_LEN_16;
151                 break;
152         default:
153                 dev_err(dai->dev,
154                         "%s: Error: Unsupported slot-count (slots = %d)!\n",
155                         __func__, drvdata->slots);
156                 return -EINVAL;
157         }
158 
159         prot_desc->tx_frame_len_1 = frame_length;
160         prot_desc->rx_frame_len_1 = frame_length;
161         prot_desc->tx_frame_len_2 = frame_length;
162         prot_desc->rx_frame_len_2 = frame_length;
163 
164         prot_desc->tx_elem_len_1 = MSP_ELEM_LEN_16;
165         prot_desc->rx_elem_len_1 = MSP_ELEM_LEN_16;
166         prot_desc->tx_elem_len_2 = MSP_ELEM_LEN_16;
167         prot_desc->rx_elem_len_2 = MSP_ELEM_LEN_16;
168 
169         return setup_frameper(dai, rate, prot_desc);
170 }
171 
172 static int setup_clocking(struct snd_soc_dai *dai,
173                         unsigned int fmt,
174                         struct ux500_msp_config *msp_config)
175 {
176         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
177         case SND_SOC_DAIFMT_NB_NF:
178                 break;
179 
180         case SND_SOC_DAIFMT_NB_IF:
181                 msp_config->tx_fsync_pol ^= 1 << TFSPOL_SHIFT;
182                 msp_config->rx_fsync_pol ^= 1 << RFSPOL_SHIFT;
183 
184                 break;
185 
186         default:
187                 dev_err(dai->dev,
188                         "%s: Error: Unsupported inversion (fmt = 0x%x)!\n",
189                         __func__, fmt);
190 
191                 return -EINVAL;
192         }
193 
194         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
195         case SND_SOC_DAIFMT_CBM_CFM:
196                 dev_dbg(dai->dev, "%s: Codec is master.\n", __func__);
197 
198                 msp_config->iodelay = 0x20;
199                 msp_config->rx_fsync_sel = 0;
200                 msp_config->tx_fsync_sel = 1 << TFSSEL_SHIFT;
201                 msp_config->tx_clk_sel = 0;
202                 msp_config->rx_clk_sel = 0;
203                 msp_config->srg_clk_sel = 0x2 << SCKSEL_SHIFT;
204 
205                 break;
206 
207         case SND_SOC_DAIFMT_CBS_CFS:
208                 dev_dbg(dai->dev, "%s: Codec is slave.\n", __func__);
209 
210                 msp_config->tx_clk_sel = TX_CLK_SEL_SRG;
211                 msp_config->tx_fsync_sel = TX_SYNC_SRG_PROG;
212                 msp_config->rx_clk_sel = RX_CLK_SEL_SRG;
213                 msp_config->rx_fsync_sel = RX_SYNC_SRG;
214                 msp_config->srg_clk_sel = 1 << SCKSEL_SHIFT;
215 
216                 break;
217 
218         default:
219                 dev_err(dai->dev, "%s: Error: Unsupported master (fmt = 0x%x)!\n",
220                         __func__, fmt);
221 
222                 return -EINVAL;
223         }
224 
225         return 0;
226 }
227 
228 static int setup_pcm_protdesc(struct snd_soc_dai *dai,
229                                 unsigned int fmt,
230                                 struct msp_protdesc *prot_desc)
231 {
232         prot_desc->rx_phase_mode = MSP_SINGLE_PHASE;
233         prot_desc->tx_phase_mode = MSP_SINGLE_PHASE;
234         prot_desc->rx_phase2_start_mode = MSP_PHASE2_START_MODE_IMEDIATE;
235         prot_desc->tx_phase2_start_mode = MSP_PHASE2_START_MODE_IMEDIATE;
236         prot_desc->rx_byte_order = MSP_BTF_MS_BIT_FIRST;
237         prot_desc->tx_byte_order = MSP_BTF_MS_BIT_FIRST;
238         prot_desc->tx_fsync_pol = MSP_FSYNC_POL(MSP_FSYNC_POL_ACT_HI);
239         prot_desc->rx_fsync_pol = MSP_FSYNC_POL_ACT_HI << RFSPOL_SHIFT;
240 
241         if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_DSP_A) {
242                 dev_dbg(dai->dev, "%s: DSP_A.\n", __func__);
243                 prot_desc->rx_clk_pol = MSP_RISING_EDGE;
244                 prot_desc->tx_clk_pol = MSP_FALLING_EDGE;
245 
246                 prot_desc->rx_data_delay = MSP_DELAY_1;
247                 prot_desc->tx_data_delay = MSP_DELAY_1;
248         } else {
249                 dev_dbg(dai->dev, "%s: DSP_B.\n", __func__);
250                 prot_desc->rx_clk_pol = MSP_FALLING_EDGE;
251                 prot_desc->tx_clk_pol = MSP_RISING_EDGE;
252 
253                 prot_desc->rx_data_delay = MSP_DELAY_0;
254                 prot_desc->tx_data_delay = MSP_DELAY_0;
255         }
256 
257         prot_desc->rx_half_word_swap = MSP_SWAP_NONE;
258         prot_desc->tx_half_word_swap = MSP_SWAP_NONE;
259         prot_desc->compression_mode = MSP_COMPRESS_MODE_LINEAR;
260         prot_desc->expansion_mode = MSP_EXPAND_MODE_LINEAR;
261         prot_desc->frame_sync_ignore = MSP_FSYNC_IGNORE;
262 
263         return 0;
264 }
265 
266 static int setup_i2s_protdesc(struct msp_protdesc *prot_desc)
267 {
268         prot_desc->rx_phase_mode = MSP_DUAL_PHASE;
269         prot_desc->tx_phase_mode = MSP_DUAL_PHASE;
270         prot_desc->rx_phase2_start_mode = MSP_PHASE2_START_MODE_FSYNC;
271         prot_desc->tx_phase2_start_mode = MSP_PHASE2_START_MODE_FSYNC;
272         prot_desc->rx_byte_order = MSP_BTF_MS_BIT_FIRST;
273         prot_desc->tx_byte_order = MSP_BTF_MS_BIT_FIRST;
274         prot_desc->tx_fsync_pol = MSP_FSYNC_POL(MSP_FSYNC_POL_ACT_LO);
275         prot_desc->rx_fsync_pol = MSP_FSYNC_POL_ACT_LO << RFSPOL_SHIFT;
276 
277         prot_desc->rx_frame_len_1 = MSP_FRAME_LEN_1;
278         prot_desc->rx_frame_len_2 = MSP_FRAME_LEN_1;
279         prot_desc->tx_frame_len_1 = MSP_FRAME_LEN_1;
280         prot_desc->tx_frame_len_2 = MSP_FRAME_LEN_1;
281         prot_desc->rx_elem_len_1 = MSP_ELEM_LEN_16;
282         prot_desc->rx_elem_len_2 = MSP_ELEM_LEN_16;
283         prot_desc->tx_elem_len_1 = MSP_ELEM_LEN_16;
284         prot_desc->tx_elem_len_2 = MSP_ELEM_LEN_16;
285 
286         prot_desc->rx_clk_pol = MSP_RISING_EDGE;
287         prot_desc->tx_clk_pol = MSP_FALLING_EDGE;
288 
289         prot_desc->rx_data_delay = MSP_DELAY_0;
290         prot_desc->tx_data_delay = MSP_DELAY_0;
291 
292         prot_desc->tx_half_word_swap = MSP_SWAP_NONE;
293         prot_desc->rx_half_word_swap = MSP_SWAP_NONE;
294         prot_desc->compression_mode = MSP_COMPRESS_MODE_LINEAR;
295         prot_desc->expansion_mode = MSP_EXPAND_MODE_LINEAR;
296         prot_desc->frame_sync_ignore = MSP_FSYNC_IGNORE;
297 
298         return 0;
299 }
300 
301 static int setup_msp_config(struct snd_pcm_substream *substream,
302                         struct snd_soc_dai *dai,
303                         struct ux500_msp_config *msp_config)
304 {
305         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
306         struct msp_protdesc *prot_desc = &msp_config->protdesc;
307         struct snd_pcm_runtime *runtime = substream->runtime;
308         unsigned int fmt = drvdata->fmt;
309         int ret;
310 
311         memset(msp_config, 0, sizeof(*msp_config));
312 
313         msp_config->f_inputclk = drvdata->master_clk;
314 
315         msp_config->tx_fifo_config = TX_FIFO_ENABLE;
316         msp_config->rx_fifo_config = RX_FIFO_ENABLE;
317         msp_config->def_elem_len = 1;
318         msp_config->direction = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
319                                 MSP_DIR_TX : MSP_DIR_RX;
320         msp_config->data_size = MSP_DATA_BITS_32;
321         msp_config->frame_freq = runtime->rate;
322 
323         dev_dbg(dai->dev, "%s: f_inputclk = %u, frame_freq = %u.\n",
324                __func__, msp_config->f_inputclk, msp_config->frame_freq);
325         /* To avoid division by zero */
326         prot_desc->clocks_per_frame = 1;
327 
328         dev_dbg(dai->dev, "%s: rate: %u, channels: %d.\n", __func__,
329                 runtime->rate, runtime->channels);
330         switch (fmt &
331                 (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_MASTER_MASK)) {
332         case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
333                 dev_dbg(dai->dev, "%s: SND_SOC_DAIFMT_I2S.\n", __func__);
334 
335                 msp_config->default_protdesc = 1;
336                 msp_config->protocol = MSP_I2S_PROTOCOL;
337                 break;
338 
339         case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
340                 dev_dbg(dai->dev, "%s: SND_SOC_DAIFMT_I2S.\n", __func__);
341 
342                 msp_config->data_size = MSP_DATA_BITS_16;
343                 msp_config->protocol = MSP_I2S_PROTOCOL;
344 
345                 ret = setup_i2s_protdesc(prot_desc);
346                 if (ret < 0)
347                         return ret;
348 
349                 break;
350 
351         case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
352         case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
353         case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBS_CFS:
354         case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM:
355                 dev_dbg(dai->dev, "%s: PCM format.\n", __func__);
356 
357                 msp_config->data_size = MSP_DATA_BITS_16;
358                 msp_config->protocol = MSP_PCM_PROTOCOL;
359 
360                 ret = setup_pcm_protdesc(dai, fmt, prot_desc);
361                 if (ret < 0)
362                         return ret;
363 
364                 ret = setup_pcm_multichan(dai, msp_config);
365                 if (ret < 0)
366                         return ret;
367 
368                 ret = setup_pcm_framing(dai, runtime->rate, prot_desc);
369                 if (ret < 0)
370                         return ret;
371 
372                 break;
373 
374         default:
375                 dev_err(dai->dev, "%s: Error: Unsupported format (%d)!\n",
376                         __func__, fmt);
377                 return -EINVAL;
378         }
379 
380         return setup_clocking(dai, fmt, msp_config);
381 }
382 
383 static int ux500_msp_dai_startup(struct snd_pcm_substream *substream,
384                                 struct snd_soc_dai *dai)
385 {
386         int ret = 0;
387         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
388 
389         dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
390                 snd_pcm_stream_str(substream));
391 
392         /* Enable regulator */
393         ret = regulator_enable(drvdata->reg_vape);
394         if (ret != 0) {
395                 dev_err(drvdata->msp->dev,
396                         "%s: Failed to enable regulator!\n", __func__);
397                 return ret;
398         }
399 
400         /* Prepare and enable clocks */
401         dev_dbg(dai->dev, "%s: Enabling MSP-clocks.\n", __func__);
402         ret = clk_prepare_enable(drvdata->pclk);
403         if (ret) {
404                 dev_err(drvdata->msp->dev,
405                         "%s: Failed to prepare/enable pclk!\n", __func__);
406                 goto err_pclk;
407         }
408 
409         ret = clk_prepare_enable(drvdata->clk);
410         if (ret) {
411                 dev_err(drvdata->msp->dev,
412                         "%s: Failed to prepare/enable clk!\n", __func__);
413                 goto err_clk;
414         }
415 
416         return ret;
417 err_clk:
418         clk_disable_unprepare(drvdata->pclk);
419 err_pclk:
420         regulator_disable(drvdata->reg_vape);
421         return ret;
422 }
423 
424 static void ux500_msp_dai_shutdown(struct snd_pcm_substream *substream,
425                                 struct snd_soc_dai *dai)
426 {
427         int ret;
428         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
429         bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
430 
431         dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
432                 snd_pcm_stream_str(substream));
433 
434         if (drvdata->vape_opp_constraint == 1) {
435                 prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
436                                         "ux500_msp_i2s", 50);
437                 drvdata->vape_opp_constraint = 0;
438         }
439 
440         if (ux500_msp_i2s_close(drvdata->msp,
441                                 is_playback ? MSP_DIR_TX : MSP_DIR_RX)) {
442                 dev_err(dai->dev,
443                         "%s: Error: MSP %d (%s): Unable to close i2s.\n",
444                         __func__, dai->id, snd_pcm_stream_str(substream));
445         }
446 
447         /* Disable and unprepare clocks */
448         clk_disable_unprepare(drvdata->clk);
449         clk_disable_unprepare(drvdata->pclk);
450 
451         /* Disable regulator */
452         ret = regulator_disable(drvdata->reg_vape);
453         if (ret < 0)
454                 dev_err(dai->dev,
455                         "%s: ERROR: Failed to disable regulator (%d)!\n",
456                         __func__, ret);
457 }
458 
459 static int ux500_msp_dai_prepare(struct snd_pcm_substream *substream,
460                                 struct snd_soc_dai *dai)
461 {
462         int ret = 0;
463         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
464         struct snd_pcm_runtime *runtime = substream->runtime;
465         struct ux500_msp_config msp_config;
466 
467         dev_dbg(dai->dev, "%s: MSP %d (%s): Enter (rate = %d).\n", __func__,
468                 dai->id, snd_pcm_stream_str(substream), runtime->rate);
469 
470         setup_msp_config(substream, dai, &msp_config);
471 
472         ret = ux500_msp_i2s_open(drvdata->msp, &msp_config);
473         if (ret < 0) {
474                 dev_err(dai->dev, "%s: Error: msp_setup failed (ret = %d)!\n",
475                         __func__, ret);
476                 return ret;
477         }
478 
479         /* Set OPP-level */
480         if ((drvdata->fmt & SND_SOC_DAIFMT_MASTER_MASK) &&
481                 (drvdata->msp->f_bitclk > 19200000)) {
482                 /* If the bit-clock is higher than 19.2MHz, Vape should be
483                  * run in 100% OPP. Only when bit-clock is used (MSP master)
484                  */
485                 prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
486                                         "ux500-msp-i2s", 100);
487                 drvdata->vape_opp_constraint = 1;
488         } else {
489                 prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
490                                         "ux500-msp-i2s", 50);
491                 drvdata->vape_opp_constraint = 0;
492         }
493 
494         return ret;
495 }
496 
497 static int ux500_msp_dai_hw_params(struct snd_pcm_substream *substream,
498                                 struct snd_pcm_hw_params *params,
499                                 struct snd_soc_dai *dai)
500 {
501         unsigned int mask, slots_active;
502         struct snd_pcm_runtime *runtime = substream->runtime;
503         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
504 
505         dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n",
506                         __func__, dai->id, snd_pcm_stream_str(substream));
507 
508         switch (drvdata->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
509         case SND_SOC_DAIFMT_I2S:
510                 snd_pcm_hw_constraint_minmax(runtime,
511                                 SNDRV_PCM_HW_PARAM_CHANNELS,
512                                 1, 2);
513                 break;
514 
515         case SND_SOC_DAIFMT_DSP_B:
516         case SND_SOC_DAIFMT_DSP_A:
517                 mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
518                         drvdata->tx_mask :
519                         drvdata->rx_mask;
520 
521                 slots_active = hweight32(mask);
522                 dev_dbg(dai->dev, "TDM-slots active: %d", slots_active);
523 
524                 snd_pcm_hw_constraint_single(runtime,
525                                 SNDRV_PCM_HW_PARAM_CHANNELS,
526                                 slots_active);
527                 break;
528 
529         default:
530                 dev_err(dai->dev,
531                         "%s: Error: Unsupported protocol (fmt = 0x%x)!\n",
532                         __func__, drvdata->fmt);
533                 return -EINVAL;
534         }
535 
536         return 0;
537 }
538 
539 static int ux500_msp_dai_set_dai_fmt(struct snd_soc_dai *dai,
540                                 unsigned int fmt)
541 {
542         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
543 
544         dev_dbg(dai->dev, "%s: MSP %d: Enter.\n", __func__, dai->id);
545 
546         switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
547                 SND_SOC_DAIFMT_MASTER_MASK)) {
548         case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS:
549         case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM:
550         case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBS_CFS:
551         case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_CBM_CFM:
552         case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBS_CFS:
553         case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_CBM_CFM:
554                 break;
555 
556         default:
557                 dev_err(dai->dev,
558                         "%s: Error: Unsupported protocol/master (fmt = 0x%x)!\n",
559                         __func__, drvdata->fmt);
560                 return -EINVAL;
561         }
562 
563         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
564         case SND_SOC_DAIFMT_NB_NF:
565         case SND_SOC_DAIFMT_NB_IF:
566         case SND_SOC_DAIFMT_IB_IF:
567                 break;
568 
569         default:
570                 dev_err(dai->dev,
571                         "%s: Error: Unsupported inversion (fmt = 0x%x)!\n",
572                         __func__, drvdata->fmt);
573                 return -EINVAL;
574         }
575 
576         drvdata->fmt = fmt;
577         return 0;
578 }
579 
580 static int ux500_msp_dai_set_tdm_slot(struct snd_soc_dai *dai,
581                                 unsigned int tx_mask,
582                                 unsigned int rx_mask,
583                                 int slots, int slot_width)
584 {
585         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
586         unsigned int cap;
587 
588         switch (slots) {
589         case 1:
590                 cap = 0x01;
591                 break;
592         case 2:
593                 cap = 0x03;
594                 break;
595         case 8:
596                 cap = 0xFF;
597                 break;
598         case 16:
599                 cap = 0xFFFF;
600                 break;
601         default:
602                 dev_err(dai->dev, "%s: Error: Unsupported slot-count (%d)!\n",
603                         __func__, slots);
604                 return -EINVAL;
605         }
606         drvdata->slots = slots;
607 
608         if (!(slot_width == 16)) {
609                 dev_err(dai->dev, "%s: Error: Unsupported slot-width (%d)!\n",
610                         __func__, slot_width);
611                 return -EINVAL;
612         }
613         drvdata->slot_width = slot_width;
614 
615         drvdata->tx_mask = tx_mask & cap;
616         drvdata->rx_mask = rx_mask & cap;
617 
618         return 0;
619 }
620 
621 static int ux500_msp_dai_set_dai_sysclk(struct snd_soc_dai *dai,
622                                         int clk_id, unsigned int freq, int dir)
623 {
624         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
625 
626         dev_dbg(dai->dev, "%s: MSP %d: Enter. clk-id: %d, freq: %u.\n",
627                 __func__, dai->id, clk_id, freq);
628 
629         switch (clk_id) {
630         case UX500_MSP_MASTER_CLOCK:
631                 drvdata->master_clk = freq;
632                 break;
633 
634         default:
635                 dev_err(dai->dev, "%s: MSP %d: Invalid clk-id (%d)!\n",
636                         __func__, dai->id, clk_id);
637                 return -EINVAL;
638         }
639 
640         return 0;
641 }
642 
643 static int ux500_msp_dai_trigger(struct snd_pcm_substream *substream,
644                                 int cmd, struct snd_soc_dai *dai)
645 {
646         int ret = 0;
647         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
648 
649         dev_dbg(dai->dev, "%s: MSP %d (%s): Enter (msp->id = %d, cmd = %d).\n",
650                 __func__, dai->id, snd_pcm_stream_str(substream),
651                 (int)drvdata->msp->id, cmd);
652 
653         ret = ux500_msp_i2s_trigger(drvdata->msp, cmd, substream->stream);
654 
655         return ret;
656 }
657 
658 static int ux500_msp_dai_of_probe(struct snd_soc_dai *dai)
659 {
660         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
661         struct snd_dmaengine_dai_dma_data *playback_dma_data;
662         struct snd_dmaengine_dai_dma_data *capture_dma_data;
663 
664         playback_dma_data = devm_kzalloc(dai->dev,
665                                          sizeof(*playback_dma_data),
666                                          GFP_KERNEL);
667         if (!playback_dma_data)
668                 return -ENOMEM;
669 
670         capture_dma_data = devm_kzalloc(dai->dev,
671                                         sizeof(*capture_dma_data),
672                                         GFP_KERNEL);
673         if (!capture_dma_data)
674                 return -ENOMEM;
675 
676         playback_dma_data->addr = drvdata->msp->playback_dma_data.tx_rx_addr;
677         capture_dma_data->addr = drvdata->msp->capture_dma_data.tx_rx_addr;
678 
679         playback_dma_data->maxburst = 4;
680         capture_dma_data->maxburst = 4;
681 
682         snd_soc_dai_init_dma_data(dai, playback_dma_data, capture_dma_data);
683 
684         return 0;
685 }
686 
687 static int ux500_msp_dai_probe(struct snd_soc_dai *dai)
688 {
689         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
690         struct msp_i2s_platform_data *pdata = dai->dev->platform_data;
691         int ret;
692 
693         if (!pdata) {
694                 ret = ux500_msp_dai_of_probe(dai);
695                 return ret;
696         }
697 
698         drvdata->msp->playback_dma_data.data_size = drvdata->slot_width;
699         drvdata->msp->capture_dma_data.data_size = drvdata->slot_width;
700 
701         snd_soc_dai_init_dma_data(dai,
702                                   &drvdata->msp->playback_dma_data,
703                                   &drvdata->msp->capture_dma_data);
704         return 0;
705 }
706 
707 static const struct snd_soc_dai_ops ux500_msp_dai_ops[] = {
708         {
709                 .set_sysclk = ux500_msp_dai_set_dai_sysclk,
710                 .set_fmt = ux500_msp_dai_set_dai_fmt,
711                 .set_tdm_slot = ux500_msp_dai_set_tdm_slot,
712                 .startup = ux500_msp_dai_startup,
713                 .shutdown = ux500_msp_dai_shutdown,
714                 .prepare = ux500_msp_dai_prepare,
715                 .trigger = ux500_msp_dai_trigger,
716                 .hw_params = ux500_msp_dai_hw_params,
717         }
718 };
719 
720 static struct snd_soc_dai_driver ux500_msp_dai_drv = {
721         .probe                 = ux500_msp_dai_probe,
722         .suspend               = NULL,
723         .resume                = NULL,
724         .playback.channels_min = UX500_MSP_MIN_CHANNELS,
725         .playback.channels_max = UX500_MSP_MAX_CHANNELS,
726         .playback.rates        = UX500_I2S_RATES,
727         .playback.formats      = UX500_I2S_FORMATS,
728         .capture.channels_min  = UX500_MSP_MIN_CHANNELS,
729         .capture.channels_max  = UX500_MSP_MAX_CHANNELS,
730         .capture.rates         = UX500_I2S_RATES,
731         .capture.formats       = UX500_I2S_FORMATS,
732         .ops                   = ux500_msp_dai_ops,
733 };
734 
735 static const struct snd_soc_component_driver ux500_msp_component = {
736         .name           = "ux500-msp",
737 };
738 
739 
740 static int ux500_msp_drv_probe(struct platform_device *pdev)
741 {
742         struct ux500_msp_i2s_drvdata *drvdata;
743         struct msp_i2s_platform_data *pdata = pdev->dev.platform_data;
744         struct device_node *np = pdev->dev.of_node;
745         int ret = 0;
746 
747         if (!pdata && !np) {
748                 dev_err(&pdev->dev, "No platform data or Device Tree found\n");
749                 return -ENODEV;
750         }
751 
752         drvdata = devm_kzalloc(&pdev->dev,
753                                 sizeof(struct ux500_msp_i2s_drvdata),
754                                 GFP_KERNEL);
755         if (!drvdata)
756                 return -ENOMEM;
757 
758         drvdata->fmt = 0;
759         drvdata->slots = 1;
760         drvdata->tx_mask = 0x01;
761         drvdata->rx_mask = 0x01;
762         drvdata->slot_width = 16;
763         drvdata->master_clk = MSP_INPUT_FREQ_APB;
764 
765         drvdata->reg_vape = devm_regulator_get(&pdev->dev, "v-ape");
766         if (IS_ERR(drvdata->reg_vape)) {
767                 ret = (int)PTR_ERR(drvdata->reg_vape);
768                 dev_err(&pdev->dev,
769                         "%s: ERROR: Failed to get Vape supply (%d)!\n",
770                         __func__, ret);
771                 return ret;
772         }
773         prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP, (char *)pdev->name, 50);
774 
775         drvdata->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
776         if (IS_ERR(drvdata->pclk)) {
777                 ret = (int)PTR_ERR(drvdata->pclk);
778                 dev_err(&pdev->dev,
779                         "%s: ERROR: devm_clk_get of pclk failed (%d)!\n",
780                         __func__, ret);
781                 return ret;
782         }
783 
784         drvdata->clk = devm_clk_get(&pdev->dev, NULL);
785         if (IS_ERR(drvdata->clk)) {
786                 ret = (int)PTR_ERR(drvdata->clk);
787                 dev_err(&pdev->dev,
788                         "%s: ERROR: devm_clk_get failed (%d)!\n",
789                         __func__, ret);
790                 return ret;
791         }
792 
793         ret = ux500_msp_i2s_init_msp(pdev, &drvdata->msp,
794                                 pdev->dev.platform_data);
795         if (!drvdata->msp) {
796                 dev_err(&pdev->dev,
797                         "%s: ERROR: Failed to init MSP-struct (%d)!",
798                         __func__, ret);
799                 return ret;
800         }
801         dev_set_drvdata(&pdev->dev, drvdata);
802 
803         ret = snd_soc_register_component(&pdev->dev, &ux500_msp_component,
804                                          &ux500_msp_dai_drv, 1);
805         if (ret < 0) {
806                 dev_err(&pdev->dev, "Error: %s: Failed to register MSP%d!\n",
807                         __func__, drvdata->msp->id);
808                 return ret;
809         }
810 
811         ret = ux500_pcm_register_platform(pdev);
812         if (ret < 0) {
813                 dev_err(&pdev->dev,
814                         "Error: %s: Failed to register PCM platform device!\n",
815                         __func__);
816                 goto err_reg_plat;
817         }
818 
819         return 0;
820 
821 err_reg_plat:
822         snd_soc_unregister_component(&pdev->dev);
823         return ret;
824 }
825 
826 static int ux500_msp_drv_remove(struct platform_device *pdev)
827 {
828         struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
829 
830         ux500_pcm_unregister_platform(pdev);
831 
832         snd_soc_unregister_component(&pdev->dev);
833 
834         prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP, "ux500_msp_i2s");
835 
836         ux500_msp_i2s_cleanup_msp(pdev, drvdata->msp);
837 
838         return 0;
839 }
840 
841 static const struct of_device_id ux500_msp_i2s_match[] = {
842         { .compatible = "stericsson,ux500-msp-i2s", },
843         {},
844 };
845 MODULE_DEVICE_TABLE(of, ux500_msp_i2s_match);
846 
847 static struct platform_driver msp_i2s_driver = {
848         .driver = {
849                 .name = "ux500-msp-i2s",
850                 .of_match_table = ux500_msp_i2s_match,
851         },
852         .probe = ux500_msp_drv_probe,
853         .remove = ux500_msp_drv_remove,
854 };
855 module_platform_driver(msp_i2s_driver);
856 
857 MODULE_LICENSE("GPL v2");
858 

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