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 snd_soc_dai_dma_data_get_capture(be);
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