1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 //
3 // Copyright (c) 2018 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5 
6 #include <linux/module.h>
7 #include <linux/of_platform.h>
8 #include <linux/regmap.h>
9 #include <sound/soc.h>
10 #include <sound/soc-dai.h>
11 
12 #include "axg-tdm-formatter.h"
13 
14 #define TDMIN_CTRL			0x00
15 #define  TDMIN_CTRL_ENABLE		BIT(31)
16 #define  TDMIN_CTRL_I2S_MODE		BIT(30)
17 #define  TDMIN_CTRL_RST_OUT		BIT(29)
18 #define  TDMIN_CTRL_RST_IN		BIT(28)
19 #define  TDMIN_CTRL_WS_INV		BIT(25)
20 #define  TDMIN_CTRL_SEL_SHIFT		20
21 #define  TDMIN_CTRL_IN_BIT_SKEW_MASK	GENMASK(18, 16)
22 #define  TDMIN_CTRL_IN_BIT_SKEW(x)	((x) << 16)
23 #define  TDMIN_CTRL_LSB_FIRST		BIT(5)
24 #define  TDMIN_CTRL_BITNUM_MASK	GENMASK(4, 0)
25 #define  TDMIN_CTRL_BITNUM(x)		((x) << 0)
26 #define TDMIN_SWAP			0x04
27 #define TDMIN_MASK0			0x08
28 #define TDMIN_MASK1			0x0c
29 #define TDMIN_MASK2			0x10
30 #define TDMIN_MASK3			0x14
31 #define TDMIN_STAT			0x18
32 #define TDMIN_MUTE_VAL			0x1c
33 #define TDMIN_MUTE0			0x20
34 #define TDMIN_MUTE1			0x24
35 #define TDMIN_MUTE2			0x28
36 #define TDMIN_MUTE3			0x2c
37 
38 static const struct regmap_config axg_tdmin_regmap_cfg = {
39 	.reg_bits	= 32,
40 	.val_bits	= 32,
41 	.reg_stride	= 4,
42 	.max_register	= TDMIN_MUTE3,
43 };
44 
45 static const char * const axg_tdmin_sel_texts[] = {
46 	"IN 0", "IN 1", "IN 2",  "IN 3",  "IN 4",  "IN 5",  "IN 6",  "IN 7",
47 	"IN 8", "IN 9", "IN 10", "IN 11", "IN 12", "IN 13", "IN 14", "IN 15",
48 };
49 
50 /* Change to special mux control to reset dapm */
51 static SOC_ENUM_SINGLE_DECL(axg_tdmin_sel_enum, TDMIN_CTRL,
52 			    TDMIN_CTRL_SEL_SHIFT, axg_tdmin_sel_texts);
53 
54 static const struct snd_kcontrol_new axg_tdmin_in_mux =
55 	SOC_DAPM_ENUM("Input Source", axg_tdmin_sel_enum);
56 
57 static struct snd_soc_dai *
axg_tdmin_get_be(struct snd_soc_dapm_widget * w)58 axg_tdmin_get_be(struct snd_soc_dapm_widget *w)
59 {
60 	struct snd_soc_dapm_path *p;
61 	struct snd_soc_dai *be;
62 
63 	snd_soc_dapm_widget_for_each_source_path(w, p) {
64 		if (!p->connect)
65 			continue;
66 
67 		if (p->source->id == snd_soc_dapm_dai_out)
68 			return (struct snd_soc_dai *)p->source->priv;
69 
70 		be = axg_tdmin_get_be(p->source);
71 		if (be)
72 			return be;
73 	}
74 
75 	return NULL;
76 }
77 
78 static struct axg_tdm_stream *
axg_tdmin_get_tdm_stream(struct snd_soc_dapm_widget * w)79 axg_tdmin_get_tdm_stream(struct snd_soc_dapm_widget *w)
80 {
81 	struct snd_soc_dai *be = axg_tdmin_get_be(w);
82 
83 	if (!be)
84 		return NULL;
85 
86 	return be->capture_dma_data;
87 }
88 
axg_tdmin_enable(struct regmap * map)89 static void axg_tdmin_enable(struct regmap *map)
90 {
91 	/* Apply both reset */
92 	regmap_update_bits(map, TDMIN_CTRL,
93 			   TDMIN_CTRL_RST_OUT | TDMIN_CTRL_RST_IN, 0);
94 
95 	/* Clear out reset before in reset */
96 	regmap_update_bits(map, TDMIN_CTRL,
97 			   TDMIN_CTRL_RST_OUT, TDMIN_CTRL_RST_OUT);
98 	regmap_update_bits(map, TDMIN_CTRL,
99 			   TDMIN_CTRL_RST_IN,  TDMIN_CTRL_RST_IN);
100 
101 	/* Actually enable tdmin */
102 	regmap_update_bits(map, TDMIN_CTRL,
103 			   TDMIN_CTRL_ENABLE, TDMIN_CTRL_ENABLE);
104 }
105 
axg_tdmin_disable(struct regmap * map)106 static void axg_tdmin_disable(struct regmap *map)
107 {
108 	regmap_update_bits(map, TDMIN_CTRL, TDMIN_CTRL_ENABLE, 0);
109 }
110 
axg_tdmin_prepare(struct regmap * map,const struct axg_tdm_formatter_hw * quirks,struct axg_tdm_stream * ts)111 static int axg_tdmin_prepare(struct regmap *map,
112 			     const struct axg_tdm_formatter_hw *quirks,
113 			     struct axg_tdm_stream *ts)
114 {
115 	unsigned int val, skew = quirks->skew_offset;
116 
117 	/* Set stream skew */
118 	switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
119 	case SND_SOC_DAIFMT_I2S:
120 	case SND_SOC_DAIFMT_DSP_A:
121 		skew += 1;
122 		break;
123 
124 	case SND_SOC_DAIFMT_LEFT_J:
125 	case SND_SOC_DAIFMT_DSP_B:
126 		break;
127 
128 	default:
129 		pr_err("Unsupported format: %u\n",
130 		       ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK);
131 		return -EINVAL;
132 	}
133 
134 	val = TDMIN_CTRL_IN_BIT_SKEW(skew);
135 
136 	/* Set stream format mode */
137 	switch (ts->iface->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
138 	case SND_SOC_DAIFMT_I2S:
139 	case SND_SOC_DAIFMT_LEFT_J:
140 	case SND_SOC_DAIFMT_RIGHT_J:
141 		val |= TDMIN_CTRL_I2S_MODE;
142 		break;
143 	}
144 
145 	/* If the sample clock is inverted, invert it back for the formatter */
146 	if (axg_tdm_lrclk_invert(ts->iface->fmt))
147 		val |= TDMIN_CTRL_WS_INV;
148 
149 	/* Set the slot width */
150 	val |= TDMIN_CTRL_BITNUM(ts->iface->slot_width - 1);
151 
152 	/*
153 	 * The following also reset LSB_FIRST which result in the formatter
154 	 * placing the first bit received at bit 31
155 	 */
156 	regmap_update_bits(map, TDMIN_CTRL,
157 			   (TDMIN_CTRL_IN_BIT_SKEW_MASK | TDMIN_CTRL_WS_INV |
158 			    TDMIN_CTRL_I2S_MODE | TDMIN_CTRL_LSB_FIRST |
159 			    TDMIN_CTRL_BITNUM_MASK), val);
160 
161 	/* Set static swap mask configuration */
162 	regmap_write(map, TDMIN_SWAP, 0x76543210);
163 
164 	return axg_tdm_formatter_set_channel_masks(map, ts, TDMIN_MASK0);
165 }
166 
167 static const struct snd_soc_dapm_widget axg_tdmin_dapm_widgets[] = {
168 	SND_SOC_DAPM_AIF_IN("IN 0",  NULL, 0, SND_SOC_NOPM, 0, 0),
169 	SND_SOC_DAPM_AIF_IN("IN 1",  NULL, 0, SND_SOC_NOPM, 0, 0),
170 	SND_SOC_DAPM_AIF_IN("IN 2",  NULL, 0, SND_SOC_NOPM, 0, 0),
171 	SND_SOC_DAPM_AIF_IN("IN 3",  NULL, 0, SND_SOC_NOPM, 0, 0),
172 	SND_SOC_DAPM_AIF_IN("IN 4",  NULL, 0, SND_SOC_NOPM, 0, 0),
173 	SND_SOC_DAPM_AIF_IN("IN 5",  NULL, 0, SND_SOC_NOPM, 0, 0),
174 	SND_SOC_DAPM_AIF_IN("IN 6",  NULL, 0, SND_SOC_NOPM, 0, 0),
175 	SND_SOC_DAPM_AIF_IN("IN 7",  NULL, 0, SND_SOC_NOPM, 0, 0),
176 	SND_SOC_DAPM_AIF_IN("IN 8",  NULL, 0, SND_SOC_NOPM, 0, 0),
177 	SND_SOC_DAPM_AIF_IN("IN 9",  NULL, 0, SND_SOC_NOPM, 0, 0),
178 	SND_SOC_DAPM_AIF_IN("IN 10", NULL, 0, SND_SOC_NOPM, 0, 0),
179 	SND_SOC_DAPM_AIF_IN("IN 11", NULL, 0, SND_SOC_NOPM, 0, 0),
180 	SND_SOC_DAPM_AIF_IN("IN 12", NULL, 0, SND_SOC_NOPM, 0, 0),
181 	SND_SOC_DAPM_AIF_IN("IN 13", NULL, 0, SND_SOC_NOPM, 0, 0),
182 	SND_SOC_DAPM_AIF_IN("IN 14", NULL, 0, SND_SOC_NOPM, 0, 0),
183 	SND_SOC_DAPM_AIF_IN("IN 15", NULL, 0, SND_SOC_NOPM, 0, 0),
184 	SND_SOC_DAPM_MUX("SRC SEL", SND_SOC_NOPM, 0, 0, &axg_tdmin_in_mux),
185 	SND_SOC_DAPM_PGA_E("DEC", SND_SOC_NOPM, 0, 0, NULL, 0,
186 			   axg_tdm_formatter_event,
187 			   (SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_PRE_PMD)),
188 	SND_SOC_DAPM_AIF_OUT("OUT", NULL, 0, SND_SOC_NOPM, 0, 0),
189 };
190 
191 static const struct snd_soc_dapm_route axg_tdmin_dapm_routes[] = {
192 	{ "SRC SEL", "IN 0",  "IN 0" },
193 	{ "SRC SEL", "IN 1",  "IN 1" },
194 	{ "SRC SEL", "IN 2",  "IN 2" },
195 	{ "SRC SEL", "IN 3",  "IN 3" },
196 	{ "SRC SEL", "IN 4",  "IN 4" },
197 	{ "SRC SEL", "IN 5",  "IN 5" },
198 	{ "SRC SEL", "IN 6",  "IN 6" },
199 	{ "SRC SEL", "IN 7",  "IN 7" },
200 	{ "SRC SEL", "IN 8",  "IN 8" },
201 	{ "SRC SEL", "IN 9",  "IN 9" },
202 	{ "SRC SEL", "IN 10", "IN 10" },
203 	{ "SRC SEL", "IN 11", "IN 11" },
204 	{ "SRC SEL", "IN 12", "IN 12" },
205 	{ "SRC SEL", "IN 13", "IN 13" },
206 	{ "SRC SEL", "IN 14", "IN 14" },
207 	{ "SRC SEL", "IN 15", "IN 15" },
208 	{ "DEC", NULL, "SRC SEL" },
209 	{ "OUT", NULL, "DEC" },
210 };
211 
212 static const struct snd_soc_component_driver axg_tdmin_component_drv = {
213 	.dapm_widgets		= axg_tdmin_dapm_widgets,
214 	.num_dapm_widgets	= ARRAY_SIZE(axg_tdmin_dapm_widgets),
215 	.dapm_routes		= axg_tdmin_dapm_routes,
216 	.num_dapm_routes	= ARRAY_SIZE(axg_tdmin_dapm_routes),
217 };
218 
219 static const struct axg_tdm_formatter_ops axg_tdmin_ops = {
220 	.get_stream	= axg_tdmin_get_tdm_stream,
221 	.prepare	= axg_tdmin_prepare,
222 	.enable		= axg_tdmin_enable,
223 	.disable	= axg_tdmin_disable,
224 };
225 
226 static const struct axg_tdm_formatter_driver axg_tdmin_drv = {
227 	.component_drv	= &axg_tdmin_component_drv,
228 	.regmap_cfg	= &axg_tdmin_regmap_cfg,
229 	.ops		= &axg_tdmin_ops,
230 	.quirks		= &(const struct axg_tdm_formatter_hw) {
231 		.skew_offset	= 3,
232 	},
233 };
234 
235 static const struct of_device_id axg_tdmin_of_match[] = {
236 	{
237 		.compatible = "amlogic,axg-tdmin",
238 		.data = &axg_tdmin_drv,
239 	}, {
240 		.compatible = "amlogic,g12a-tdmin",
241 		.data = &axg_tdmin_drv,
242 	}, {
243 		.compatible = "amlogic,sm1-tdmin",
244 		.data = &axg_tdmin_drv,
245 	}, {}
246 };
247 MODULE_DEVICE_TABLE(of, axg_tdmin_of_match);
248 
249 static struct platform_driver axg_tdmin_pdrv = {
250 	.probe = axg_tdm_formatter_probe,
251 	.driver = {
252 		.name = "axg-tdmin",
253 		.of_match_table = axg_tdmin_of_match,
254 	},
255 };
256 module_platform_driver(axg_tdmin_pdrv);
257 
258 MODULE_DESCRIPTION("Amlogic AXG TDM input formatter driver");
259 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
260 MODULE_LICENSE("GPL v2");
261