xref: /linux/sound/soc/meson/g12a-tohdmitx.c (revision 06d07429858317ded2db7986113a9e0129cd599b)
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 
g12a_tohdmitx_i2s_mux_put_enum(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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 
g12a_tohdmitx_spdif_mux_put_enum(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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 
g12a_tohdmi_component_probe(struct snd_soc_component * c)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 
g12a_tohdmitx_probe(struct platform_device * pdev)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