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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4 
 kernel/sound/soc/rockchip/rockchip_pdm.c
....@@ -1,17 +1,8 @@
1
+// SPDX-License-Identifier: GPL-2.0-only
12 /*
23  * Rockchip PDM ALSA SoC Digital Audio Interface(DAI)  driver
34  *
45  * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
5
- *
6
- * This software is licensed under the terms of the GNU General Public
7
- * License version 2, as published by the Free Software Foundation, and
8
- * may be copied, distributed, and modified under those terms.
9
- *
10
- * This program is distributed in the hope that it will be useful,
11
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
12
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13
- * GNU General Public License for more details.
14
- *
156  */
167 
178 #include <linux/module.h>
....@@ -29,20 +20,23 @@
2920 #include "rockchip_pdm.h"
3021 
3122 #define PDM_DMA_BURST_SIZE		(8) /* size * width: 8*4 = 32 bytes */
32
-#define PDM_SIGNOFF_CLK_RATE		(100000000)
23
+#define PDM_SIGNOFF_CLK_100M		(100000000)
24
+#define PDM_SIGNOFF_CLK_300M		(300000000)
3325 #define PDM_PATH_MAX			(4)
34
-#define CLK_PPM_MIN			(-1000)
35
-#define CLK_PPM_MAX			(1000)
3626 #define PDM_DEFAULT_RATE		(48000)
3727 #define PDM_START_DELAY_MS_DEFAULT	(20)
3828 #define PDM_START_DELAY_MS_MIN		(0)
3929 #define PDM_START_DELAY_MS_MAX		(1000)
4030 #define PDM_FILTER_DELAY_MS_MIN		(20)
4131 #define PDM_FILTER_DELAY_MS_MAX		(1000)
32
+#define PDM_CLK_SHIFT_PPM_MAX		(1000000) /* 1 ppm */
33
+#define CLK_PPM_MIN		(-1000)
34
+#define CLK_PPM_MAX		(1000)
4235 
4336 enum rk_pdm_version {
37
+	RK_PDM_RK3229,
4438 	RK_PDM_RK3308,
45
-	RK_PDM_RK3328,
39
+	RK_PDM_RK3588,
4640 	RK_PDM_RV1126,
4741 };
4842 
....@@ -101,9 +95,10 @@
10195 };
10296 
10397 static unsigned int get_pdm_clk(struct rk_pdm_dev *pdm, unsigned int sr,
104
-				unsigned int *clk_src, unsigned int *clk_out)
98
+				unsigned int *clk_src, unsigned int *clk_out,
99
+				unsigned int signoff)
105100 {
106
-	unsigned int i, count, clk, div, rate;
101
+	unsigned int i, count, clk, div, rate, delta;
107102 
108103 	clk = 0;
109104 	if (!sr)
....@@ -122,7 +117,9 @@
122117 				break;
123118 			}
124119 			rate = clk_round_rate(pdm->clk, clkref[i].clk);
125
-			if (rate != clkref[i].clk)
120
+			delta = clkref[i].clk / PDM_CLK_SHIFT_PPM_MAX;
121
+			if (rate < clkref[i].clk - delta ||
122
+			    rate > clkref[i].clk + delta)
126123 				continue;
127124 			clk = clkref[i].clk;
128125 			*clk_src = clkref[i].clk;
....@@ -131,7 +128,7 @@
131128 	}
132129 
133130 	if (!clk) {
134
-		clk = clk_round_rate(pdm->clk, PDM_SIGNOFF_CLK_RATE);
131
+		clk = clk_round_rate(pdm->clk, signoff);
135132 		*clk_src = clk;
136133 	}
137134 	return clk;
....@@ -207,22 +204,35 @@
207204 	return snd_soc_dai_get_drvdata(dai);
208205 }
209206 
210
-static void rockchip_pdm_drop_fifo(struct rk_pdm_dev *pdm)
211
-{
212
-	int cnt, val, i;
213
-
214
-	/* drop the dirty data */
215
-	regmap_read(pdm->regmap, PDM_FIFO_CTRL, &cnt);
216
-	for (i = 0; i < PDM_FIFO_CNT(cnt); i++)
217
-		regmap_read(pdm->regmap, PDM_RXFIFO_DATA, &val);
218
-}
219
-
220207 static void rockchip_pdm_rxctrl(struct rk_pdm_dev *pdm, int on)
221208 {
209
+	unsigned long flags;
210
+
222211 	if (on) {
223
-		rockchip_pdm_drop_fifo(pdm);
212
+		/* The PDM device need to delete some unused data
213
+		 * since the pdm of various manufacturers can not
214
+		 * be stable quickly. This is done by commit "ASoC:
215
+		 * rockchip: pdm: Fix pop noise in the beginning".
216
+		 *
217
+		 * But we do not know how many data we delete, this
218
+		 * cause channel disorder. For example, we record
219
+		 * two channel 24-bit sound, then delete some starting
220
+		 * data. Because the deleted starting data is uncertain,
221
+		 * the next data may be left or right channel and cause
222
+		 * channel disorder.
223
+		 *
224
+		 * Luckily, we can use the PDM_RX_CLR to fix this.
225
+		 * Use the PDM_RX_CLR to clear fifo written data and
226
+		 * address, but can not clear the read data and address.
227
+		 * In initial state, the read data and address are zero.
228
+		 */
229
+		local_irq_save(flags);
230
+		regmap_update_bits(pdm->regmap, PDM_SYSCONFIG,
231
+				   PDM_RX_CLR_MASK,
232
+				   PDM_RX_CLR_WR);
224233 		regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
225234 				   PDM_DMA_RD_MSK, PDM_DMA_RD_EN);
235
+		local_irq_restore(flags);
226236 	} else {
227237 		regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
228238 				   PDM_DMA_RD_MSK, PDM_DMA_RD_DIS);
....@@ -264,18 +274,20 @@
264274 	return ret;
265275 }
266276 
267
-static int rockchip_pdm_set_samplerate(struct rk_pdm_dev *pdm,
268
-				       unsigned int samplerate)
277
+static int rockchip_pdm_set_samplerate(struct rk_pdm_dev *pdm, unsigned int samplerate)
269278 {
270
-	unsigned int clk_rate, clk_div;
271
-	unsigned int clk_src, clk_out = 0;
272
-	unsigned int val = 0, div = 0, rate, delta;
279
+
280
+	unsigned int val = 0, div = 0;
281
+	unsigned int clk_rate, clk_div, rate, delta;
282
+	unsigned int clk_src = 0, clk_out = 0, signoff = PDM_SIGNOFF_CLK_100M;
273283 	unsigned long m, n;
274284 	uint64_t ppm;
275
-	int ret;
276285 	bool change;
286
+	int ret;
277287 
278
-	clk_rate = get_pdm_clk(pdm, samplerate, &clk_src, &clk_out);
288
+	if (pdm->version == RK_PDM_RK3588)
289
+		signoff = PDM_SIGNOFF_CLK_300M;
290
+	clk_rate = get_pdm_clk(pdm, samplerate, &clk_src, &clk_out, signoff);
279291 	if (!clk_rate)
280292 		return -EINVAL;
281293 
....@@ -312,6 +324,7 @@
312324 		return ret;
313325 
314326 	if (pdm->version == RK_PDM_RK3308 ||
327
+	    pdm->version == RK_PDM_RK3588 ||
315328 	    pdm->version == RK_PDM_RV1126) {
316329 		rational_best_approximation(clk_out, clk_src,
317330 					    GENMASK(16 - 1, 0),
....@@ -341,7 +354,7 @@
341354 				   val);
342355 	}
343356 
344
-	if (pdm->version == RK_PDM_RV1126) {
357
+	if (pdm->version == RK_PDM_RK3588 || pdm->version == RK_PDM_RV1126) {
345358 		val = get_pdm_cic_ratio(clk_out);
346359 		regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CIC_RATIO_MSK, val);
347360 		val = samplerate_to_bit(samplerate);
....@@ -351,10 +364,11 @@
351364 		val = get_pdm_ds_ratio(samplerate);
352365 		regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
353366 	}
354
-	regmap_update_bits(pdm->regmap, PDM_HPF_CTRL, PDM_HPF_CF_MSK, PDM_HPF_60HZ);
367
+
368
+	regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
369
+			   PDM_HPF_CF_MSK, PDM_HPF_60HZ);
355370 	regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
356371 			   PDM_HPF_LE | PDM_HPF_RE, PDM_HPF_LE | PDM_HPF_RE);
357
-
358372 	return 0;
359373 }
360374 
....@@ -370,7 +384,7 @@
370384 
371385 	rockchip_pdm_set_samplerate(pdm, params_rate(params));
372386 
373
-	if (pdm->version != RK_PDM_RK3328)
387
+	if (pdm->version != RK_PDM_RK3229)
374388 		regmap_update_bits(pdm->regmap, PDM_CTRL0,
375389 				   PDM_MODE_MSK, PDM_MODE_LJ);
376390 
....@@ -398,13 +412,13 @@
398412 	switch (params_channels(params)) {
399413 	case 8:
400414 		val |= PDM_PATH3_EN;
401
-		/* fallthrough */
415
+		fallthrough;
402416 	case 6:
403417 		val |= PDM_PATH2_EN;
404
-		/* fallthrough */
418
+		fallthrough;
405419 	case 4:
406420 		val |= PDM_PATH1_EN;
407
-		/* fallthrough */
421
+		fallthrough;
408422 	case 2:
409423 		val |= PDM_PATH0_EN;
410424 		break;
....@@ -476,51 +490,6 @@
476490 	return ret;
477491 }
478492 
479
-static int rockchip_pdm_clk_compensation_info(struct snd_kcontrol *kcontrol,
480
-					      struct snd_ctl_elem_info *uinfo)
481
-{
482
-	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
483
-	uinfo->count = 1;
484
-	uinfo->value.integer.min = CLK_PPM_MIN;
485
-	uinfo->value.integer.max = CLK_PPM_MAX;
486
-	uinfo->value.integer.step = 1;
487
-
488
-	return 0;
489
-}
490
-
491
-static int rockchip_pdm_clk_compensation_get(struct snd_kcontrol *kcontrol,
492
-					     struct snd_ctl_elem_value *ucontrol)
493
-{
494
-	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
495
-	struct rk_pdm_dev *pdm = snd_soc_dai_get_drvdata(dai);
496
-
497
-	ucontrol->value.integer.value[0] = pdm->clk_ppm;
498
-
499
-	return 0;
500
-}
501
-
502
-static int rockchip_pdm_clk_compensation_put(struct snd_kcontrol *kcontrol,
503
-					     struct snd_ctl_elem_value *ucontrol)
504
-{
505
-	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
506
-	struct rk_pdm_dev *pdm = snd_soc_dai_get_drvdata(dai);
507
-	int ppm = ucontrol->value.integer.value[0];
508
-
509
-	if ((ucontrol->value.integer.value[0] < CLK_PPM_MIN) ||
510
-	    (ucontrol->value.integer.value[0] > CLK_PPM_MAX))
511
-		return -EINVAL;
512
-
513
-	return rockchip_pdm_clk_set_rate(pdm, pdm->clk_root, pdm->clk_root_rate, ppm);
514
-}
515
-
516
-static struct snd_kcontrol_new rockchip_pdm_compensation_control = {
517
-	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
518
-	.name = "PCM Clk Compensation In PPM",
519
-	.info = rockchip_pdm_clk_compensation_info,
520
-	.get = rockchip_pdm_clk_compensation_get,
521
-	.put = rockchip_pdm_clk_compensation_put,
522
-};
523
-
524493 static int rockchip_pdm_start_delay_info(struct snd_kcontrol *kcontrol,
525494 					 struct snd_ctl_elem_info *uinfo)
526495 {
....@@ -531,7 +500,6 @@
531500 	uinfo->value.integer.step = 1;
532501 
533502 	return 0;
534
-
535503 }
536504 
537505 static int rockchip_pdm_start_delay_get(struct snd_kcontrol *kcontrol,
....@@ -615,16 +583,64 @@
615583 	},
616584 };
617585 
586
+static int rockchip_pdm_clk_compensation_info(struct snd_kcontrol *kcontrol,
587
+					      struct snd_ctl_elem_info *uinfo)
588
+{
589
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
590
+	uinfo->count = 1;
591
+	uinfo->value.integer.min = CLK_PPM_MIN;
592
+	uinfo->value.integer.max = CLK_PPM_MAX;
593
+	uinfo->value.integer.step = 1;
594
+
595
+	return 0;
596
+}
597
+
598
+
599
+static int rockchip_pdm_clk_compensation_get(struct snd_kcontrol *kcontrol,
600
+					     struct snd_ctl_elem_value *ucontrol)
601
+
602
+{
603
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
604
+	struct rk_pdm_dev *pdm = snd_soc_dai_get_drvdata(dai);
605
+
606
+	ucontrol->value.integer.value[0] = pdm->clk_ppm;
607
+
608
+	return 0;
609
+}
610
+
611
+static int rockchip_pdm_clk_compensation_put(struct snd_kcontrol *kcontrol,
612
+					     struct snd_ctl_elem_value *ucontrol)
613
+{
614
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
615
+	struct rk_pdm_dev *pdm = snd_soc_dai_get_drvdata(dai);
616
+
617
+	int ppm = ucontrol->value.integer.value[0];
618
+
619
+	if ((ucontrol->value.integer.value[0] < CLK_PPM_MIN) ||
620
+	    (ucontrol->value.integer.value[0] > CLK_PPM_MAX))
621
+		return -EINVAL;
622
+
623
+	return rockchip_pdm_clk_set_rate(pdm, pdm->clk_root, pdm->clk_root_rate, ppm);
624
+}
625
+
626
+static struct snd_kcontrol_new rockchip_pdm_compensation_control = {
627
+	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
628
+	.name = "PDM PCM Clk Compensation In PPM",
629
+	.info = rockchip_pdm_clk_compensation_info,
630
+	.get = rockchip_pdm_clk_compensation_get,
631
+	.put = rockchip_pdm_clk_compensation_put,
632
+
633
+};
634
+
618635 static int rockchip_pdm_dai_probe(struct snd_soc_dai *dai)
619636 {
620637 	struct rk_pdm_dev *pdm = to_info(dai);
621638 
622639 	dai->capture_dma_data = &pdm->capture_dma_data;
623
-
624
-	if (pdm->clk_calibrate)
625
-		snd_soc_add_dai_controls(dai, &rockchip_pdm_compensation_control, 1);
626640 	snd_soc_add_dai_controls(dai, rockchip_pdm_controls,
627641 				 ARRAY_SIZE(rockchip_pdm_controls));
642
+	if (pdm->clk_calibrate)
643
+		snd_soc_add_dai_controls(dai, &rockchip_pdm_compensation_control, 1);
628644 	return 0;
629645 }
630646 
....@@ -735,6 +751,7 @@
735751 		return ret;
736752 	}
737753 
754
+	rockchip_pdm_rxctrl(pdm, 0);
738755 	regcache_cache_only(pdm->regmap, false);
739756 	regcache_mark_dirty(pdm->regmap);
740757 	ret = regcache_sync(pdm->regmap);
....@@ -831,31 +848,21 @@
831848 	.cache_type = REGCACHE_FLAT,
832849 };
833850 
834
-static const struct of_device_id rockchip_pdm_match[] = {
835
-#ifdef CONFIG_CPU_PX30
851
+static const struct of_device_id rockchip_pdm_match[] __maybe_unused = {
852
+	{ .compatible = "rockchip,pdm",
853
+	  .data = (void *)RK_PDM_RK3229 },
836854 	{ .compatible = "rockchip,px30-pdm",
837855 	  .data = (void *)RK_PDM_RK3308 },
838
-#endif
839
-#ifdef CONFIG_CPU_RK1808
840856 	{ .compatible = "rockchip,rk1808-pdm",
841857 	  .data = (void *)RK_PDM_RK3308 },
842
-#endif
843
-#ifdef CONFIG_CPU_RK3308
844858 	{ .compatible = "rockchip,rk3308-pdm",
845859 	  .data = (void *)RK_PDM_RK3308 },
846
-#endif
847
-#ifdef CONFIG_CPU_RK3328
848
-	{ .compatible = "rockchip,rk3328-pdm",
849
-	  .data = (void *)RK_PDM_RK3328 },
850
-#endif
851
-#ifdef CONFIG_CPU_RK3568
852860 	{ .compatible = "rockchip,rk3568-pdm",
853861 	  .data = (void *)RK_PDM_RV1126 },
854
-#endif
855
-#ifdef CONFIG_CPU_RV1126
862
+	{ .compatible = "rockchip,rk3588-pdm",
863
+	  .data = (void *)RK_PDM_RK3588 },
856864 	{ .compatible = "rockchip,rv1126-pdm",
857865 	  .data = (void *)RK_PDM_RV1126 },
858
-#endif
859866 	{},
860867 };
861868 MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
....@@ -910,8 +917,7 @@
910917 			return PTR_ERR(pdm->reset);
911918 	}
912919 
913
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
914
-	regs = devm_ioremap_resource(&pdev->dev, res);
920
+	regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
915921 	if (IS_ERR(regs))
916922 		return PTR_ERR(regs);
917923 
....@@ -927,6 +933,9 @@
927933 	pdm->dev = &pdev->dev;
928934 	dev_set_drvdata(&pdev->dev, pdm);
929935 
936
+	pdm->start_delay_ms = PDM_START_DELAY_MS_DEFAULT;
937
+	pdm->filter_delay_ms = PDM_FILTER_DELAY_MS_MIN;
938
+
930939 	pdm->clk_calibrate =
931940 		of_property_read_bool(node, "rockchip,mclk-calibrate");
932941 	if (pdm->clk_calibrate) {
....@@ -937,9 +946,6 @@
937946 		pdm->clk_root_initial_rate = clk_get_rate(pdm->clk_root);
938947 		pdm->clk_root_rate = pdm->clk_root_initial_rate;
939948 	}
940
-
941
-	pdm->start_delay_ms = PDM_START_DELAY_MS_DEFAULT;
942
-	pdm->filter_delay_ms = PDM_FILTER_DELAY_MS_MIN;
943949 
944950 	pdm->clk = devm_clk_get(&pdev->dev, "pdm_clk");
945951 	if (IS_ERR(pdm->clk))
....@@ -976,8 +982,10 @@
976982 	if (ret != 0 && ret != -ENOENT)
977983 		goto err_suspend;
978984 
979
-	if (of_property_read_bool(node, "rockchip,no-dmaengine"))
985
+	if (of_property_read_bool(node, "rockchip,no-dmaengine")) {
986
+		dev_info(&pdev->dev, "Used for Multi-DAI\n");
980987 		return 0;
988
+	}
981989 
982990 	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
983991 	if (ret) {