1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2019 BayLibre, SAS.
4 // Author: Jerome Brunet <jbrunet@baylibre.com>
5
6 #include <linux/bitfield.h>
7 #include <linux/clk.h>
8 #include <linux/module.h>
9 #include <sound/pcm_params.h>
10 #include <linux/regmap.h>
11 #include <linux/reset.h>
12 #include <sound/soc.h>
13 #include <sound/soc-dai.h>
14
15 #include <dt-bindings/sound/meson-g12a-tohdmitx.h>
16 #include "meson-codec-glue.h"
17
18 #define G12A_TOHDMITX_DRV_NAME "g12a-tohdmitx"
19
20 #define TOHDMITX_CTRL0 0x0
21 #define CTRL0_ENABLE_SHIFT 31
22 #define CTRL0_I2S_DAT_SEL_SHIFT 12
23 #define CTRL0_I2S_DAT_SEL (0x3 << CTRL0_I2S_DAT_SEL_SHIFT)
24 #define CTRL0_I2S_LRCLK_SEL GENMASK(9, 8)
25 #define CTRL0_I2S_BLK_CAP_INV BIT(7)
26 #define CTRL0_I2S_BCLK_O_INV BIT(6)
27 #define CTRL0_I2S_BCLK_SEL GENMASK(5, 4)
28 #define CTRL0_SPDIF_CLK_CAP_INV BIT(3)
29 #define CTRL0_SPDIF_CLK_O_INV BIT(2)
30 #define CTRL0_SPDIF_SEL_SHIFT 1
31 #define CTRL0_SPDIF_SEL (0x1 << CTRL0_SPDIF_SEL_SHIFT)
32 #define CTRL0_SPDIF_CLK_SEL BIT(0)
33
34 static const char * const g12a_tohdmitx_i2s_mux_texts[] = {
35 "I2S A", "I2S B", "I2S C",
36 };
37
38 static int g12a_tohdmitx_i2s_mux_put_enum(struct snd_kcontrol *kcontrol,
39 struct snd_ctl_elem_value *ucontrol)
40 {
41 struct snd_soc_component *component =
42 snd_soc_dapm_kcontrol_component(kcontrol);
43 struct snd_soc_dapm_context *dapm =
44 snd_soc_dapm_kcontrol_dapm(kcontrol);
45 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
46 unsigned int mux, changed;
47
48 if (ucontrol->value.enumerated.item[0] >= e->items)
49 return -EINVAL;
50
51 mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
52 changed = snd_soc_component_test_bits(component, e->reg,
53 CTRL0_I2S_DAT_SEL,
54 FIELD_PREP(CTRL0_I2S_DAT_SEL,
55 mux));
56
57 if (!changed)
58 return 0;
59
60 /* Force disconnect of the mux while updating */
61 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
62
63 snd_soc_component_update_bits(component, e->reg,
64 CTRL0_I2S_DAT_SEL |
65 CTRL0_I2S_LRCLK_SEL |
66 CTRL0_I2S_BCLK_SEL,
67 FIELD_PREP(CTRL0_I2S_DAT_SEL, mux) |
68 FIELD_PREP(CTRL0_I2S_LRCLK_SEL, mux) |
69 FIELD_PREP(CTRL0_I2S_BCLK_SEL, mux));
70
71 snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
72
73 return 1;
74 }
75
76 static SOC_ENUM_SINGLE_DECL(g12a_tohdmitx_i2s_mux_enum, TOHDMITX_CTRL0,
77 CTRL0_I2S_DAT_SEL_SHIFT,
78 g12a_tohdmitx_i2s_mux_texts);
79
80 static const struct snd_kcontrol_new g12a_tohdmitx_i2s_mux =
81 SOC_DAPM_ENUM_EXT("I2S Source", g12a_tohdmitx_i2s_mux_enum,
82 snd_soc_dapm_get_enum_double,
83 g12a_tohdmitx_i2s_mux_put_enum);
84
85 static const char * const g12a_tohdmitx_spdif_mux_texts[] = {
86 "SPDIF A", "SPDIF B",
87 };
88
89 static int g12a_tohdmitx_spdif_mux_put_enum(struct snd_kcontrol *kcontrol,
90 struct snd_ctl_elem_value *ucontrol)
91 {
92 struct snd_soc_component *component =
93 snd_soc_dapm_kcontrol_component(kcontrol);
94 struct snd_soc_dapm_context *dapm =
95 snd_soc_dapm_kcontrol_dapm(kcontrol);
96 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
97 unsigned int mux, changed;
98
99 if (ucontrol->value.enumerated.item[0] >= e->items)
100 return -EINVAL;
101
102 mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
103 changed = snd_soc_component_test_bits(component, TOHDMITX_CTRL0,
104 CTRL0_SPDIF_SEL,
105 FIELD_PREP(CTRL0_SPDIF_SEL, mux));
106
107 if (!changed)
108 return 0;
109
110 /* Force disconnect of the mux while updating */
111 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
112
113 snd_soc_component_update_bits(component, TOHDMITX_CTRL0,
114 CTRL0_SPDIF_SEL |
115 CTRL0_SPDIF_CLK_SEL,
116 FIELD_PREP(CTRL0_SPDIF_SEL, mux) |
117 FIELD_PREP(CTRL0_SPDIF_CLK_SEL, mux));
118
119 snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
120
121 return 1;
122 }
123
124 static SOC_ENUM_SINGLE_DECL(g12a_tohdmitx_spdif_mux_enum, TOHDMITX_CTRL0,
125 CTRL0_SPDIF_SEL_SHIFT,
126 g12a_tohdmitx_spdif_mux_texts);
127
128 static const struct snd_kcontrol_new g12a_tohdmitx_spdif_mux =
129 SOC_DAPM_ENUM_EXT("SPDIF Source", g12a_tohdmitx_spdif_mux_enum,
130 snd_soc_dapm_get_enum_double,
131 g12a_tohdmitx_spdif_mux_put_enum);
132
133 static const struct snd_kcontrol_new g12a_tohdmitx_out_enable =
134 SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOHDMITX_CTRL0,
135 CTRL0_ENABLE_SHIFT, 1, 0);
136
137 static const struct snd_soc_dapm_widget g12a_tohdmitx_widgets[] = {
138 SND_SOC_DAPM_MUX("I2S SRC", SND_SOC_NOPM, 0, 0,
139 &g12a_tohdmitx_i2s_mux),
140 SND_SOC_DAPM_SWITCH("I2S OUT EN", SND_SOC_NOPM, 0, 0,
141 &g12a_tohdmitx_out_enable),
142 SND_SOC_DAPM_MUX("SPDIF SRC", SND_SOC_NOPM, 0, 0,
143 &g12a_tohdmitx_spdif_mux),
144 SND_SOC_DAPM_SWITCH("SPDIF OUT EN", SND_SOC_NOPM, 0, 0,
145 &g12a_tohdmitx_out_enable),
146 };
147
148 static const struct snd_soc_dai_ops g12a_tohdmitx_input_ops = {
149 .probe = meson_codec_glue_input_dai_probe,
150 .remove = meson_codec_glue_input_dai_remove,
151 .hw_params = meson_codec_glue_input_hw_params,
152 .set_fmt = meson_codec_glue_input_set_fmt,
153 };
154
155 static const struct snd_soc_dai_ops g12a_tohdmitx_output_ops = {
156 .startup = meson_codec_glue_output_startup,
157 };
158
159 #define TOHDMITX_SPDIF_FORMATS \
160 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
161 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)
162
163 #define TOHDMITX_I2S_FORMATS \
164 (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
165 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE | \
166 SNDRV_PCM_FMTBIT_S32_LE)
167
168 #define TOHDMITX_STREAM(xname, xsuffix, xfmt, xchmax) \
169 { \
170 .stream_name = xname " " xsuffix, \
171 .channels_min = 1, \
172 .channels_max = (xchmax), \
173 .rate_min = 8000, \
174 .rate_max = 192000, \
175 .formats = (xfmt), \
176 }
177
178 #define TOHDMITX_IN(xname, xid, xfmt, xchmax) { \
179 .name = xname, \
180 .id = (xid), \
181 .playback = TOHDMITX_STREAM(xname, "Playback", xfmt, xchmax), \
182 .ops = &g12a_tohdmitx_input_ops, \
183 }
184
185 #define TOHDMITX_OUT(xname, xid, xfmt, xchmax) { \
186 .name = xname, \
187 .id = (xid), \
188 .capture = TOHDMITX_STREAM(xname, "Capture", xfmt, xchmax), \
189 .ops = &g12a_tohdmitx_output_ops, \
190 }
191
192 static struct snd_soc_dai_driver g12a_tohdmitx_dai_drv[] = {
193 TOHDMITX_IN("I2S IN A", TOHDMITX_I2S_IN_A,
194 TOHDMITX_I2S_FORMATS, 8),
195 TOHDMITX_IN("I2S IN B", TOHDMITX_I2S_IN_B,
196 TOHDMITX_I2S_FORMATS, 8),
197 TOHDMITX_IN("I2S IN C", TOHDMITX_I2S_IN_C,
198 TOHDMITX_I2S_FORMATS, 8),
199 TOHDMITX_OUT("I2S OUT", TOHDMITX_I2S_OUT,
200 TOHDMITX_I2S_FORMATS, 8),
201 TOHDMITX_IN("SPDIF IN A", TOHDMITX_SPDIF_IN_A,
202 TOHDMITX_SPDIF_FORMATS, 2),
203 TOHDMITX_IN("SPDIF IN B", TOHDMITX_SPDIF_IN_B,
204 TOHDMITX_SPDIF_FORMATS, 2),
205 TOHDMITX_OUT("SPDIF OUT", TOHDMITX_SPDIF_OUT,
206 TOHDMITX_SPDIF_FORMATS, 2),
207 };
208
209 static int g12a_tohdmi_component_probe(struct snd_soc_component *c)
210 {
211 /* Initialize the static clock parameters */
212 return snd_soc_component_write(c, TOHDMITX_CTRL0,
213 CTRL0_I2S_BLK_CAP_INV | CTRL0_SPDIF_CLK_CAP_INV);
214 }
215
216 static const struct snd_soc_dapm_route g12a_tohdmitx_routes[] = {
217 { "I2S SRC", "I2S A", "I2S IN A Playback" },
218 { "I2S SRC", "I2S B", "I2S IN B Playback" },
219 { "I2S SRC", "I2S C", "I2S IN C Playback" },
220 { "I2S OUT EN", "Switch", "I2S SRC" },
221 { "I2S OUT Capture", NULL, "I2S OUT EN" },
222 { "SPDIF SRC", "SPDIF A", "SPDIF IN A Playback" },
223 { "SPDIF SRC", "SPDIF B", "SPDIF IN B Playback" },
224 { "SPDIF OUT EN", "Switch", "SPDIF SRC" },
225 { "SPDIF OUT Capture", NULL, "SPDIF OUT EN" },
226 };
227
228 static const struct snd_soc_component_driver g12a_tohdmitx_component_drv = {
229 .probe = g12a_tohdmi_component_probe,
230 .dapm_widgets = g12a_tohdmitx_widgets,
231 .num_dapm_widgets = ARRAY_SIZE(g12a_tohdmitx_widgets),
232 .dapm_routes = g12a_tohdmitx_routes,
233 .num_dapm_routes = ARRAY_SIZE(g12a_tohdmitx_routes),
234 .endianness = 1,
235 };
236
237 static const struct regmap_config g12a_tohdmitx_regmap_cfg = {
238 .reg_bits = 32,
239 .val_bits = 32,
240 .reg_stride = 4,
241 };
242
243 static const struct of_device_id g12a_tohdmitx_of_match[] = {
244 { .compatible = "amlogic,g12a-tohdmitx", },
245 {}
246 };
247 MODULE_DEVICE_TABLE(of, g12a_tohdmitx_of_match);
248
249 static int g12a_tohdmitx_probe(struct platform_device *pdev)
250 {
251 struct device *dev = &pdev->dev;
252 void __iomem *regs;
253 struct regmap *map;
254 int ret;
255
256 ret = device_reset(dev);
257 if (ret)
258 return ret;
259
260 regs = devm_platform_ioremap_resource(pdev, 0);
261 if (IS_ERR(regs))
262 return PTR_ERR(regs);
263
264 map = devm_regmap_init_mmio(dev, regs, &g12a_tohdmitx_regmap_cfg);
265 if (IS_ERR(map)) {
266 dev_err(dev, "failed to init regmap: %ld\n",
267 PTR_ERR(map));
268 return PTR_ERR(map);
269 }
270
271 return devm_snd_soc_register_component(dev,
272 &g12a_tohdmitx_component_drv, g12a_tohdmitx_dai_drv,
273 ARRAY_SIZE(g12a_tohdmitx_dai_drv));
274 }
275
276 static struct platform_driver g12a_tohdmitx_pdrv = {
277 .driver = {
278 .name = G12A_TOHDMITX_DRV_NAME,
279 .of_match_table = g12a_tohdmitx_of_match,
280 },
281 .probe = g12a_tohdmitx_probe,
282 };
283 module_platform_driver(g12a_tohdmitx_pdrv);
284
285 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
286 MODULE_DESCRIPTION("Amlogic G12a To HDMI Tx Control Codec Driver");
287 MODULE_LICENSE("GPL v2");
288
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