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