xref: /openbmc/linux/sound/soc/ux500/ux500_msp_dai.c (revision ce11656c)
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 
10 #include <linux/module.h>
11 #include <linux/slab.h>
12 #include <linux/bitops.h>
13 #include <linux/platform_device.h>
14 #include <linux/clk.h>
15 #include <linux/of.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/mfd/dbx500-prcmu.h>
18 
19 #include <sound/soc.h>
20 #include <sound/soc-dai.h>
21 #include <sound/dmaengine_pcm.h>
22 
23 #include "ux500_msp_i2s.h"
24 #include "ux500_msp_dai.h"
25 #include "ux500_pcm.h"
26 
setup_pcm_multichan(struct snd_soc_dai * dai,struct ux500_msp_config * msp_config)27 static int setup_pcm_multichan(struct snd_soc_dai *dai,
28 			struct ux500_msp_config *msp_config)
29 {
30 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
31 	struct msp_multichannel_config *multi =
32 					&msp_config->multichannel_config;
33 
34 	if (drvdata->slots > 1) {
35 		msp_config->multichannel_configured = 1;
36 
37 		multi->tx_multichannel_enable = true;
38 		multi->rx_multichannel_enable = true;
39 		multi->rx_comparison_enable_mode = MSP_COMPARISON_DISABLED;
40 
41 		multi->tx_channel_0_enable = drvdata->tx_mask;
42 		multi->tx_channel_1_enable = 0;
43 		multi->tx_channel_2_enable = 0;
44 		multi->tx_channel_3_enable = 0;
45 
46 		multi->rx_channel_0_enable = drvdata->rx_mask;
47 		multi->rx_channel_1_enable = 0;
48 		multi->rx_channel_2_enable = 0;
49 		multi->rx_channel_3_enable = 0;
50 
51 		dev_dbg(dai->dev,
52 			"%s: Multichannel enabled. Slots: %d, TX: %u, RX: %u\n",
53 			__func__, drvdata->slots, multi->tx_channel_0_enable,
54 			multi->rx_channel_0_enable);
55 	}
56 
57 	return 0;
58 }
59 
setup_frameper(struct snd_soc_dai * dai,unsigned int rate,struct msp_protdesc * prot_desc)60 static int setup_frameper(struct snd_soc_dai *dai, unsigned int rate,
61 			struct msp_protdesc *prot_desc)
62 {
63 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
64 
65 	switch (drvdata->slots) {
66 	case 1:
67 		switch (rate) {
68 		case 8000:
69 			prot_desc->frame_period =
70 				FRAME_PER_SINGLE_SLOT_8_KHZ;
71 			break;
72 
73 		case 16000:
74 			prot_desc->frame_period =
75 				FRAME_PER_SINGLE_SLOT_16_KHZ;
76 			break;
77 
78 		case 44100:
79 			prot_desc->frame_period =
80 				FRAME_PER_SINGLE_SLOT_44_1_KHZ;
81 			break;
82 
83 		case 48000:
84 			prot_desc->frame_period =
85 				FRAME_PER_SINGLE_SLOT_48_KHZ;
86 			break;
87 
88 		default:
89 			dev_err(dai->dev,
90 				"%s: Error: Unsupported sample-rate (freq = %d)!\n",
91 				__func__, rate);
92 			return -EINVAL;
93 		}
94 		break;
95 
96 	case 2:
97 		prot_desc->frame_period = FRAME_PER_2_SLOTS;
98 		break;
99 
100 	case 8:
101 		prot_desc->frame_period = FRAME_PER_8_SLOTS;
102 		break;
103 
104 	case 16:
105 		prot_desc->frame_period = FRAME_PER_16_SLOTS;
106 		break;
107 	default:
108 		dev_err(dai->dev,
109 			"%s: Error: Unsupported slot-count (slots = %d)!\n",
110 			__func__, drvdata->slots);
111 		return -EINVAL;
112 	}
113 
114 	prot_desc->clocks_per_frame =
115 			prot_desc->frame_period+1;
116 
117 	dev_dbg(dai->dev, "%s: Clocks per frame: %u\n",
118 		__func__,
119 		prot_desc->clocks_per_frame);
120 
121 	return 0;
122 }
123 
setup_pcm_framing(struct snd_soc_dai * dai,unsigned int rate,struct msp_protdesc * prot_desc)124 static int setup_pcm_framing(struct snd_soc_dai *dai, unsigned int rate,
125 			struct msp_protdesc *prot_desc)
126 {
127 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
128 
129 	u32 frame_length = MSP_FRAME_LEN_1;
130 
131 	prot_desc->frame_width = 0;
132 
133 	switch (drvdata->slots) {
134 	case 1:
135 		frame_length = MSP_FRAME_LEN_1;
136 		break;
137 
138 	case 2:
139 		frame_length = MSP_FRAME_LEN_2;
140 		break;
141 
142 	case 8:
143 		frame_length = MSP_FRAME_LEN_8;
144 		break;
145 
146 	case 16:
147 		frame_length = MSP_FRAME_LEN_16;
148 		break;
149 	default:
150 		dev_err(dai->dev,
151 			"%s: Error: Unsupported slot-count (slots = %d)!\n",
152 			__func__, drvdata->slots);
153 		return -EINVAL;
154 	}
155 
156 	prot_desc->tx_frame_len_1 = frame_length;
157 	prot_desc->rx_frame_len_1 = frame_length;
158 	prot_desc->tx_frame_len_2 = frame_length;
159 	prot_desc->rx_frame_len_2 = frame_length;
160 
161 	prot_desc->tx_elem_len_1 = MSP_ELEM_LEN_16;
162 	prot_desc->rx_elem_len_1 = MSP_ELEM_LEN_16;
163 	prot_desc->tx_elem_len_2 = MSP_ELEM_LEN_16;
164 	prot_desc->rx_elem_len_2 = MSP_ELEM_LEN_16;
165 
166 	return setup_frameper(dai, rate, prot_desc);
167 }
168 
setup_clocking(struct snd_soc_dai * dai,unsigned int fmt,struct ux500_msp_config * msp_config)169 static int setup_clocking(struct snd_soc_dai *dai,
170 			unsigned int fmt,
171 			struct ux500_msp_config *msp_config)
172 {
173 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
174 	case SND_SOC_DAIFMT_NB_NF:
175 		break;
176 
177 	case SND_SOC_DAIFMT_NB_IF:
178 		msp_config->tx_fsync_pol ^= 1 << TFSPOL_SHIFT;
179 		msp_config->rx_fsync_pol ^= 1 << RFSPOL_SHIFT;
180 
181 		break;
182 
183 	default:
184 		dev_err(dai->dev,
185 			"%s: Error: Unsupported inversion (fmt = 0x%x)!\n",
186 			__func__, fmt);
187 
188 		return -EINVAL;
189 	}
190 
191 	switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
192 	case SND_SOC_DAIFMT_BC_FC:
193 		dev_dbg(dai->dev, "%s: Codec is master.\n", __func__);
194 
195 		msp_config->iodelay = 0x20;
196 		msp_config->rx_fsync_sel = 0;
197 		msp_config->tx_fsync_sel = 1 << TFSSEL_SHIFT;
198 		msp_config->tx_clk_sel = 0;
199 		msp_config->rx_clk_sel = 0;
200 		msp_config->srg_clk_sel = 0x2 << SCKSEL_SHIFT;
201 
202 		break;
203 
204 	case SND_SOC_DAIFMT_BP_FP:
205 		dev_dbg(dai->dev, "%s: Codec is slave.\n", __func__);
206 
207 		msp_config->tx_clk_sel = TX_CLK_SEL_SRG;
208 		msp_config->tx_fsync_sel = TX_SYNC_SRG_PROG;
209 		msp_config->rx_clk_sel = RX_CLK_SEL_SRG;
210 		msp_config->rx_fsync_sel = RX_SYNC_SRG;
211 		msp_config->srg_clk_sel = 1 << SCKSEL_SHIFT;
212 
213 		break;
214 
215 	default:
216 		dev_err(dai->dev, "%s: Error: Unsupported master (fmt = 0x%x)!\n",
217 			__func__, fmt);
218 
219 		return -EINVAL;
220 	}
221 
222 	return 0;
223 }
224 
setup_pcm_protdesc(struct snd_soc_dai * dai,unsigned int fmt,struct msp_protdesc * prot_desc)225 static int setup_pcm_protdesc(struct snd_soc_dai *dai,
226 				unsigned int fmt,
227 				struct msp_protdesc *prot_desc)
228 {
229 	prot_desc->rx_phase_mode = MSP_SINGLE_PHASE;
230 	prot_desc->tx_phase_mode = MSP_SINGLE_PHASE;
231 	prot_desc->rx_phase2_start_mode = MSP_PHASE2_START_MODE_IMEDIATE;
232 	prot_desc->tx_phase2_start_mode = MSP_PHASE2_START_MODE_IMEDIATE;
233 	prot_desc->rx_byte_order = MSP_BTF_MS_BIT_FIRST;
234 	prot_desc->tx_byte_order = MSP_BTF_MS_BIT_FIRST;
235 	prot_desc->tx_fsync_pol = MSP_FSYNC_POL(MSP_FSYNC_POL_ACT_HI);
236 	prot_desc->rx_fsync_pol = MSP_FSYNC_POL_ACT_HI << RFSPOL_SHIFT;
237 
238 	if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_DSP_A) {
239 		dev_dbg(dai->dev, "%s: DSP_A.\n", __func__);
240 		prot_desc->rx_clk_pol = MSP_RISING_EDGE;
241 		prot_desc->tx_clk_pol = MSP_FALLING_EDGE;
242 
243 		prot_desc->rx_data_delay = MSP_DELAY_1;
244 		prot_desc->tx_data_delay = MSP_DELAY_1;
245 	} else {
246 		dev_dbg(dai->dev, "%s: DSP_B.\n", __func__);
247 		prot_desc->rx_clk_pol = MSP_FALLING_EDGE;
248 		prot_desc->tx_clk_pol = MSP_RISING_EDGE;
249 
250 		prot_desc->rx_data_delay = MSP_DELAY_0;
251 		prot_desc->tx_data_delay = MSP_DELAY_0;
252 	}
253 
254 	prot_desc->rx_half_word_swap = MSP_SWAP_NONE;
255 	prot_desc->tx_half_word_swap = MSP_SWAP_NONE;
256 	prot_desc->compression_mode = MSP_COMPRESS_MODE_LINEAR;
257 	prot_desc->expansion_mode = MSP_EXPAND_MODE_LINEAR;
258 	prot_desc->frame_sync_ignore = MSP_FSYNC_IGNORE;
259 
260 	return 0;
261 }
262 
setup_i2s_protdesc(struct msp_protdesc * prot_desc)263 static int setup_i2s_protdesc(struct msp_protdesc *prot_desc)
264 {
265 	prot_desc->rx_phase_mode = MSP_DUAL_PHASE;
266 	prot_desc->tx_phase_mode = MSP_DUAL_PHASE;
267 	prot_desc->rx_phase2_start_mode = MSP_PHASE2_START_MODE_FSYNC;
268 	prot_desc->tx_phase2_start_mode = MSP_PHASE2_START_MODE_FSYNC;
269 	prot_desc->rx_byte_order = MSP_BTF_MS_BIT_FIRST;
270 	prot_desc->tx_byte_order = MSP_BTF_MS_BIT_FIRST;
271 	prot_desc->tx_fsync_pol = MSP_FSYNC_POL(MSP_FSYNC_POL_ACT_LO);
272 	prot_desc->rx_fsync_pol = MSP_FSYNC_POL_ACT_LO << RFSPOL_SHIFT;
273 
274 	prot_desc->rx_frame_len_1 = MSP_FRAME_LEN_1;
275 	prot_desc->rx_frame_len_2 = MSP_FRAME_LEN_1;
276 	prot_desc->tx_frame_len_1 = MSP_FRAME_LEN_1;
277 	prot_desc->tx_frame_len_2 = MSP_FRAME_LEN_1;
278 	prot_desc->rx_elem_len_1 = MSP_ELEM_LEN_16;
279 	prot_desc->rx_elem_len_2 = MSP_ELEM_LEN_16;
280 	prot_desc->tx_elem_len_1 = MSP_ELEM_LEN_16;
281 	prot_desc->tx_elem_len_2 = MSP_ELEM_LEN_16;
282 
283 	prot_desc->rx_clk_pol = MSP_RISING_EDGE;
284 	prot_desc->tx_clk_pol = MSP_FALLING_EDGE;
285 
286 	prot_desc->rx_data_delay = MSP_DELAY_0;
287 	prot_desc->tx_data_delay = MSP_DELAY_0;
288 
289 	prot_desc->tx_half_word_swap = MSP_SWAP_NONE;
290 	prot_desc->rx_half_word_swap = MSP_SWAP_NONE;
291 	prot_desc->compression_mode = MSP_COMPRESS_MODE_LINEAR;
292 	prot_desc->expansion_mode = MSP_EXPAND_MODE_LINEAR;
293 	prot_desc->frame_sync_ignore = MSP_FSYNC_IGNORE;
294 
295 	return 0;
296 }
297 
setup_msp_config(struct snd_pcm_substream * substream,struct snd_soc_dai * dai,struct ux500_msp_config * msp_config)298 static int setup_msp_config(struct snd_pcm_substream *substream,
299 			struct snd_soc_dai *dai,
300 			struct ux500_msp_config *msp_config)
301 {
302 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
303 	struct msp_protdesc *prot_desc = &msp_config->protdesc;
304 	struct snd_pcm_runtime *runtime = substream->runtime;
305 	unsigned int fmt = drvdata->fmt;
306 	int ret;
307 
308 	memset(msp_config, 0, sizeof(*msp_config));
309 
310 	msp_config->f_inputclk = drvdata->master_clk;
311 
312 	msp_config->tx_fifo_config = TX_FIFO_ENABLE;
313 	msp_config->rx_fifo_config = RX_FIFO_ENABLE;
314 	msp_config->def_elem_len = 1;
315 	msp_config->direction = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
316 				MSP_DIR_TX : MSP_DIR_RX;
317 	msp_config->data_size = MSP_DATA_BITS_32;
318 	msp_config->frame_freq = runtime->rate;
319 
320 	dev_dbg(dai->dev, "%s: f_inputclk = %u, frame_freq = %u.\n",
321 	       __func__, msp_config->f_inputclk, msp_config->frame_freq);
322 	/* To avoid division by zero */
323 	prot_desc->clocks_per_frame = 1;
324 
325 	dev_dbg(dai->dev, "%s: rate: %u, channels: %d.\n", __func__,
326 		runtime->rate, runtime->channels);
327 	switch (fmt &
328 		(SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK)) {
329 	case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_BP_FP:
330 		dev_dbg(dai->dev, "%s: SND_SOC_DAIFMT_I2S.\n", __func__);
331 
332 		msp_config->default_protdesc = 1;
333 		msp_config->protocol = MSP_I2S_PROTOCOL;
334 		break;
335 
336 	case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_BC_FC:
337 		dev_dbg(dai->dev, "%s: SND_SOC_DAIFMT_I2S.\n", __func__);
338 
339 		msp_config->data_size = MSP_DATA_BITS_16;
340 		msp_config->protocol = MSP_I2S_PROTOCOL;
341 
342 		ret = setup_i2s_protdesc(prot_desc);
343 		if (ret < 0)
344 			return ret;
345 
346 		break;
347 
348 	case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_BP_FP:
349 	case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_BC_FC:
350 	case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_BP_FP:
351 	case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_BC_FC:
352 		dev_dbg(dai->dev, "%s: PCM format.\n", __func__);
353 
354 		msp_config->data_size = MSP_DATA_BITS_16;
355 		msp_config->protocol = MSP_PCM_PROTOCOL;
356 
357 		ret = setup_pcm_protdesc(dai, fmt, prot_desc);
358 		if (ret < 0)
359 			return ret;
360 
361 		ret = setup_pcm_multichan(dai, msp_config);
362 		if (ret < 0)
363 			return ret;
364 
365 		ret = setup_pcm_framing(dai, runtime->rate, prot_desc);
366 		if (ret < 0)
367 			return ret;
368 
369 		break;
370 
371 	default:
372 		dev_err(dai->dev, "%s: Error: Unsupported format (%d)!\n",
373 			__func__, fmt);
374 		return -EINVAL;
375 	}
376 
377 	return setup_clocking(dai, fmt, msp_config);
378 }
379 
ux500_msp_dai_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)380 static int ux500_msp_dai_startup(struct snd_pcm_substream *substream,
381 				struct snd_soc_dai *dai)
382 {
383 	int ret = 0;
384 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
385 
386 	dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
387 		snd_pcm_stream_str(substream));
388 
389 	/* Enable regulator */
390 	ret = regulator_enable(drvdata->reg_vape);
391 	if (ret != 0) {
392 		dev_err(drvdata->msp->dev,
393 			"%s: Failed to enable regulator!\n", __func__);
394 		return ret;
395 	}
396 
397 	/* Prepare and enable clocks */
398 	dev_dbg(dai->dev, "%s: Enabling MSP-clocks.\n", __func__);
399 	ret = clk_prepare_enable(drvdata->pclk);
400 	if (ret) {
401 		dev_err(drvdata->msp->dev,
402 			"%s: Failed to prepare/enable pclk!\n", __func__);
403 		goto err_pclk;
404 	}
405 
406 	ret = clk_prepare_enable(drvdata->clk);
407 	if (ret) {
408 		dev_err(drvdata->msp->dev,
409 			"%s: Failed to prepare/enable clk!\n", __func__);
410 		goto err_clk;
411 	}
412 
413 	return ret;
414 err_clk:
415 	clk_disable_unprepare(drvdata->pclk);
416 err_pclk:
417 	regulator_disable(drvdata->reg_vape);
418 	return ret;
419 }
420 
ux500_msp_dai_shutdown(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)421 static void ux500_msp_dai_shutdown(struct snd_pcm_substream *substream,
422 				struct snd_soc_dai *dai)
423 {
424 	int ret;
425 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
426 	bool is_playback = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
427 
428 	dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n", __func__, dai->id,
429 		snd_pcm_stream_str(substream));
430 
431 	if (drvdata->vape_opp_constraint == 1) {
432 		prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
433 					"ux500_msp_i2s", 50);
434 		drvdata->vape_opp_constraint = 0;
435 	}
436 
437 	if (ux500_msp_i2s_close(drvdata->msp,
438 				is_playback ? MSP_DIR_TX : MSP_DIR_RX)) {
439 		dev_err(dai->dev,
440 			"%s: Error: MSP %d (%s): Unable to close i2s.\n",
441 			__func__, dai->id, snd_pcm_stream_str(substream));
442 	}
443 
444 	/* Disable and unprepare clocks */
445 	clk_disable_unprepare(drvdata->clk);
446 	clk_disable_unprepare(drvdata->pclk);
447 
448 	/* Disable regulator */
449 	ret = regulator_disable(drvdata->reg_vape);
450 	if (ret < 0)
451 		dev_err(dai->dev,
452 			"%s: ERROR: Failed to disable regulator (%d)!\n",
453 			__func__, ret);
454 }
455 
ux500_msp_dai_prepare(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)456 static int ux500_msp_dai_prepare(struct snd_pcm_substream *substream,
457 				struct snd_soc_dai *dai)
458 {
459 	int ret = 0;
460 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
461 	struct snd_pcm_runtime *runtime = substream->runtime;
462 	struct ux500_msp_config msp_config;
463 
464 	dev_dbg(dai->dev, "%s: MSP %d (%s): Enter (rate = %d).\n", __func__,
465 		dai->id, snd_pcm_stream_str(substream), runtime->rate);
466 
467 	setup_msp_config(substream, dai, &msp_config);
468 
469 	ret = ux500_msp_i2s_open(drvdata->msp, &msp_config);
470 	if (ret < 0) {
471 		dev_err(dai->dev, "%s: Error: msp_setup failed (ret = %d)!\n",
472 			__func__, ret);
473 		return ret;
474 	}
475 
476 	/* Set OPP-level */
477 	if ((drvdata->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) &&
478 		(drvdata->msp->f_bitclk > 19200000)) {
479 		/* If the bit-clock is higher than 19.2MHz, Vape should be
480 		 * run in 100% OPP. Only when bit-clock is used (MSP master)
481 		 */
482 		prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
483 					"ux500-msp-i2s", 100);
484 		drvdata->vape_opp_constraint = 1;
485 	} else {
486 		prcmu_qos_update_requirement(PRCMU_QOS_APE_OPP,
487 					"ux500-msp-i2s", 50);
488 		drvdata->vape_opp_constraint = 0;
489 	}
490 
491 	return ret;
492 }
493 
ux500_msp_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)494 static int ux500_msp_dai_hw_params(struct snd_pcm_substream *substream,
495 				struct snd_pcm_hw_params *params,
496 				struct snd_soc_dai *dai)
497 {
498 	unsigned int mask, slots_active;
499 	struct snd_pcm_runtime *runtime = substream->runtime;
500 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
501 
502 	dev_dbg(dai->dev, "%s: MSP %d (%s): Enter.\n",
503 			__func__, dai->id, snd_pcm_stream_str(substream));
504 
505 	switch (drvdata->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
506 	case SND_SOC_DAIFMT_I2S:
507 		snd_pcm_hw_constraint_minmax(runtime,
508 				SNDRV_PCM_HW_PARAM_CHANNELS,
509 				1, 2);
510 		break;
511 
512 	case SND_SOC_DAIFMT_DSP_B:
513 	case SND_SOC_DAIFMT_DSP_A:
514 		mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
515 			drvdata->tx_mask :
516 			drvdata->rx_mask;
517 
518 		slots_active = hweight32(mask);
519 		dev_dbg(dai->dev, "TDM-slots active: %d", slots_active);
520 
521 		snd_pcm_hw_constraint_single(runtime,
522 				SNDRV_PCM_HW_PARAM_CHANNELS,
523 				slots_active);
524 		break;
525 
526 	default:
527 		dev_err(dai->dev,
528 			"%s: Error: Unsupported protocol (fmt = 0x%x)!\n",
529 			__func__, drvdata->fmt);
530 		return -EINVAL;
531 	}
532 
533 	return 0;
534 }
535 
ux500_msp_dai_set_dai_fmt(struct snd_soc_dai * dai,unsigned int fmt)536 static int ux500_msp_dai_set_dai_fmt(struct snd_soc_dai *dai,
537 				unsigned int fmt)
538 {
539 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
540 
541 	dev_dbg(dai->dev, "%s: MSP %d: Enter.\n", __func__, dai->id);
542 
543 	switch (fmt & (SND_SOC_DAIFMT_FORMAT_MASK |
544 		SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK)) {
545 	case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_BP_FP:
546 	case SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_BC_FC:
547 	case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_BP_FP:
548 	case SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_BC_FC:
549 	case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_BP_FP:
550 	case SND_SOC_DAIFMT_DSP_A | SND_SOC_DAIFMT_BC_FC:
551 		break;
552 
553 	default:
554 		dev_err(dai->dev,
555 			"%s: Error: Unsupported protocol/master (fmt = 0x%x)!\n",
556 			__func__, drvdata->fmt);
557 		return -EINVAL;
558 	}
559 
560 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
561 	case SND_SOC_DAIFMT_NB_NF:
562 	case SND_SOC_DAIFMT_NB_IF:
563 	case SND_SOC_DAIFMT_IB_IF:
564 		break;
565 
566 	default:
567 		dev_err(dai->dev,
568 			"%s: Error: Unsupported inversion (fmt = 0x%x)!\n",
569 			__func__, drvdata->fmt);
570 		return -EINVAL;
571 	}
572 
573 	drvdata->fmt = fmt;
574 	return 0;
575 }
576 
ux500_msp_dai_set_tdm_slot(struct snd_soc_dai * dai,unsigned int tx_mask,unsigned int rx_mask,int slots,int slot_width)577 static int ux500_msp_dai_set_tdm_slot(struct snd_soc_dai *dai,
578 				unsigned int tx_mask,
579 				unsigned int rx_mask,
580 				int slots, int slot_width)
581 {
582 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
583 	unsigned int cap;
584 
585 	switch (slots) {
586 	case 1:
587 		cap = 0x01;
588 		break;
589 	case 2:
590 		cap = 0x03;
591 		break;
592 	case 8:
593 		cap = 0xFF;
594 		break;
595 	case 16:
596 		cap = 0xFFFF;
597 		break;
598 	default:
599 		dev_err(dai->dev, "%s: Error: Unsupported slot-count (%d)!\n",
600 			__func__, slots);
601 		return -EINVAL;
602 	}
603 	drvdata->slots = slots;
604 
605 	if (!(slot_width == 16)) {
606 		dev_err(dai->dev, "%s: Error: Unsupported slot-width (%d)!\n",
607 			__func__, slot_width);
608 		return -EINVAL;
609 	}
610 	drvdata->slot_width = slot_width;
611 
612 	drvdata->tx_mask = tx_mask & cap;
613 	drvdata->rx_mask = rx_mask & cap;
614 
615 	return 0;
616 }
617 
ux500_msp_dai_set_dai_sysclk(struct snd_soc_dai * dai,int clk_id,unsigned int freq,int dir)618 static int ux500_msp_dai_set_dai_sysclk(struct snd_soc_dai *dai,
619 					int clk_id, unsigned int freq, int dir)
620 {
621 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
622 
623 	dev_dbg(dai->dev, "%s: MSP %d: Enter. clk-id: %d, freq: %u.\n",
624 		__func__, dai->id, clk_id, freq);
625 
626 	switch (clk_id) {
627 	case UX500_MSP_MASTER_CLOCK:
628 		drvdata->master_clk = freq;
629 		break;
630 
631 	default:
632 		dev_err(dai->dev, "%s: MSP %d: Invalid clk-id (%d)!\n",
633 			__func__, dai->id, clk_id);
634 		return -EINVAL;
635 	}
636 
637 	return 0;
638 }
639 
ux500_msp_dai_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)640 static int ux500_msp_dai_trigger(struct snd_pcm_substream *substream,
641 				int cmd, struct snd_soc_dai *dai)
642 {
643 	int ret = 0;
644 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
645 
646 	dev_dbg(dai->dev, "%s: MSP %d (%s): Enter (msp->id = %d, cmd = %d).\n",
647 		__func__, dai->id, snd_pcm_stream_str(substream),
648 		(int)drvdata->msp->id, cmd);
649 
650 	ret = ux500_msp_i2s_trigger(drvdata->msp, cmd, substream->stream);
651 
652 	return ret;
653 }
654 
ux500_msp_dai_of_probe(struct snd_soc_dai * dai)655 static int ux500_msp_dai_of_probe(struct snd_soc_dai *dai)
656 {
657 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(dai->dev);
658 	struct snd_dmaengine_dai_dma_data *playback_dma_data;
659 	struct snd_dmaengine_dai_dma_data *capture_dma_data;
660 
661 	playback_dma_data = devm_kzalloc(dai->dev,
662 					 sizeof(*playback_dma_data),
663 					 GFP_KERNEL);
664 	if (!playback_dma_data)
665 		return -ENOMEM;
666 
667 	capture_dma_data = devm_kzalloc(dai->dev,
668 					sizeof(*capture_dma_data),
669 					GFP_KERNEL);
670 	if (!capture_dma_data)
671 		return -ENOMEM;
672 
673 	playback_dma_data->addr = drvdata->msp->tx_rx_addr;
674 	capture_dma_data->addr = drvdata->msp->tx_rx_addr;
675 
676 	playback_dma_data->maxburst = 4;
677 	capture_dma_data->maxburst = 4;
678 
679 	snd_soc_dai_init_dma_data(dai, playback_dma_data, capture_dma_data);
680 
681 	return 0;
682 }
683 
684 static const struct snd_soc_dai_ops ux500_msp_dai_ops[] = {
685 	{
686 		.probe = ux500_msp_dai_of_probe,
687 		.set_sysclk = ux500_msp_dai_set_dai_sysclk,
688 		.set_fmt = ux500_msp_dai_set_dai_fmt,
689 		.set_tdm_slot = ux500_msp_dai_set_tdm_slot,
690 		.startup = ux500_msp_dai_startup,
691 		.shutdown = ux500_msp_dai_shutdown,
692 		.prepare = ux500_msp_dai_prepare,
693 		.trigger = ux500_msp_dai_trigger,
694 		.hw_params = ux500_msp_dai_hw_params,
695 	}
696 };
697 
698 static struct snd_soc_dai_driver ux500_msp_dai_drv = {
699 	.playback.channels_min = UX500_MSP_MIN_CHANNELS,
700 	.playback.channels_max = UX500_MSP_MAX_CHANNELS,
701 	.playback.rates        = UX500_I2S_RATES,
702 	.playback.formats      = UX500_I2S_FORMATS,
703 	.capture.channels_min  = UX500_MSP_MIN_CHANNELS,
704 	.capture.channels_max  = UX500_MSP_MAX_CHANNELS,
705 	.capture.rates         = UX500_I2S_RATES,
706 	.capture.formats       = UX500_I2S_FORMATS,
707 	.ops                   = ux500_msp_dai_ops,
708 };
709 
710 static const struct snd_soc_component_driver ux500_msp_component = {
711 	.name			= "ux500-msp",
712 	.legacy_dai_naming	= 1,
713 };
714 
715 
ux500_msp_drv_probe(struct platform_device * pdev)716 static int ux500_msp_drv_probe(struct platform_device *pdev)
717 {
718 	struct ux500_msp_i2s_drvdata *drvdata;
719 	int ret = 0;
720 
721 	drvdata = devm_kzalloc(&pdev->dev,
722 				sizeof(struct ux500_msp_i2s_drvdata),
723 				GFP_KERNEL);
724 	if (!drvdata)
725 		return -ENOMEM;
726 
727 	drvdata->fmt = 0;
728 	drvdata->slots = 1;
729 	drvdata->tx_mask = 0x01;
730 	drvdata->rx_mask = 0x01;
731 	drvdata->slot_width = 16;
732 	drvdata->master_clk = MSP_INPUT_FREQ_APB;
733 
734 	drvdata->reg_vape = devm_regulator_get(&pdev->dev, "v-ape");
735 	if (IS_ERR(drvdata->reg_vape)) {
736 		ret = (int)PTR_ERR(drvdata->reg_vape);
737 		dev_err(&pdev->dev,
738 			"%s: ERROR: Failed to get Vape supply (%d)!\n",
739 			__func__, ret);
740 		return ret;
741 	}
742 	prcmu_qos_add_requirement(PRCMU_QOS_APE_OPP, (char *)pdev->name, 50);
743 
744 	drvdata->pclk = devm_clk_get(&pdev->dev, "apb_pclk");
745 	if (IS_ERR(drvdata->pclk)) {
746 		ret = (int)PTR_ERR(drvdata->pclk);
747 		dev_err(&pdev->dev,
748 			"%s: ERROR: devm_clk_get of pclk failed (%d)!\n",
749 			__func__, ret);
750 		return ret;
751 	}
752 
753 	drvdata->clk = devm_clk_get(&pdev->dev, NULL);
754 	if (IS_ERR(drvdata->clk)) {
755 		ret = (int)PTR_ERR(drvdata->clk);
756 		dev_err(&pdev->dev,
757 			"%s: ERROR: devm_clk_get failed (%d)!\n",
758 			__func__, ret);
759 		return ret;
760 	}
761 
762 	ret = ux500_msp_i2s_init_msp(pdev, &drvdata->msp);
763 	if (!drvdata->msp) {
764 		dev_err(&pdev->dev,
765 			"%s: ERROR: Failed to init MSP-struct (%d)!",
766 			__func__, ret);
767 		return ret;
768 	}
769 	dev_set_drvdata(&pdev->dev, drvdata);
770 
771 	ret = snd_soc_register_component(&pdev->dev, &ux500_msp_component,
772 					 &ux500_msp_dai_drv, 1);
773 	if (ret < 0) {
774 		dev_err(&pdev->dev, "Error: %s: Failed to register MSP%d!\n",
775 			__func__, drvdata->msp->id);
776 		return ret;
777 	}
778 
779 	ret = ux500_pcm_register_platform(pdev);
780 	if (ret < 0) {
781 		dev_err(&pdev->dev,
782 			"Error: %s: Failed to register PCM platform device!\n",
783 			__func__);
784 		goto err_reg_plat;
785 	}
786 
787 	return 0;
788 
789 err_reg_plat:
790 	snd_soc_unregister_component(&pdev->dev);
791 	return ret;
792 }
793 
ux500_msp_drv_remove(struct platform_device * pdev)794 static void ux500_msp_drv_remove(struct platform_device *pdev)
795 {
796 	struct ux500_msp_i2s_drvdata *drvdata = dev_get_drvdata(&pdev->dev);
797 
798 	ux500_pcm_unregister_platform(pdev);
799 
800 	snd_soc_unregister_component(&pdev->dev);
801 
802 	prcmu_qos_remove_requirement(PRCMU_QOS_APE_OPP, "ux500_msp_i2s");
803 
804 	ux500_msp_i2s_cleanup_msp(pdev, drvdata->msp);
805 }
806 
807 static const struct of_device_id ux500_msp_i2s_match[] = {
808 	{ .compatible = "stericsson,ux500-msp-i2s", },
809 	{},
810 };
811 MODULE_DEVICE_TABLE(of, ux500_msp_i2s_match);
812 
813 static struct platform_driver msp_i2s_driver = {
814 	.driver = {
815 		.name = "ux500-msp-i2s",
816 		.of_match_table = ux500_msp_i2s_match,
817 	},
818 	.probe = ux500_msp_drv_probe,
819 	.remove_new = ux500_msp_drv_remove,
820 };
821 module_platform_driver(msp_i2s_driver);
822 
823 MODULE_LICENSE("GPL v2");
824