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
34static const char * const g12a_tohdmitx_i2s_mux_texts[] = {
35	"I2S A", "I2S B", "I2S C",
36};
37
38static 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
76static SOC_ENUM_SINGLE_DECL(g12a_tohdmitx_i2s_mux_enum, TOHDMITX_CTRL0,
77			    CTRL0_I2S_DAT_SEL_SHIFT,
78			    g12a_tohdmitx_i2s_mux_texts);
79
80static 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
85static const char * const g12a_tohdmitx_spdif_mux_texts[] = {
86	"SPDIF A", "SPDIF B",
87};
88
89static 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
124static SOC_ENUM_SINGLE_DECL(g12a_tohdmitx_spdif_mux_enum, TOHDMITX_CTRL0,
125			    CTRL0_SPDIF_SEL_SHIFT,
126			    g12a_tohdmitx_spdif_mux_texts);
127
128static 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
133static const struct snd_kcontrol_new g12a_tohdmitx_out_enable =
134	SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOHDMITX_CTRL0,
135				    CTRL0_ENABLE_SHIFT, 1, 0);
136
137static 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
148static const struct snd_soc_dai_ops g12a_tohdmitx_input_ops = {
149	.hw_params	= meson_codec_glue_input_hw_params,
150	.set_fmt	= meson_codec_glue_input_set_fmt,
151};
152
153static const struct snd_soc_dai_ops g12a_tohdmitx_output_ops = {
154	.startup	= meson_codec_glue_output_startup,
155};
156
157#define TOHDMITX_SPDIF_FORMATS					\
158	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |	\
159	 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE)
160
161#define TOHDMITX_I2S_FORMATS					\
162	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |	\
163	 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE |	\
164	 SNDRV_PCM_FMTBIT_S32_LE)
165
166#define TOHDMITX_STREAM(xname, xsuffix, xfmt, xchmax)		\
167{								\
168	.stream_name	= xname " " xsuffix,			\
169	.channels_min	= 1,					\
170	.channels_max	= (xchmax),				\
171	.rate_min       = 8000,					\
172	.rate_max	= 192000,				\
173	.formats	= (xfmt),				\
174}
175
176#define TOHDMITX_IN(xname, xid, xfmt, xchmax) {				\
177	.name = xname,							\
178	.id = (xid),							\
179	.playback = TOHDMITX_STREAM(xname, "Playback", xfmt, xchmax),	\
180	.ops = &g12a_tohdmitx_input_ops,				\
181	.probe = meson_codec_glue_input_dai_probe,			\
182	.remove = meson_codec_glue_input_dai_remove,			\
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
192static 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
209static 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
216static 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
228static 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	.non_legacy_dai_naming	= 1,
236};
237
238static const struct regmap_config g12a_tohdmitx_regmap_cfg = {
239	.reg_bits	= 32,
240	.val_bits	= 32,
241	.reg_stride	= 4,
242};
243
244static const struct of_device_id g12a_tohdmitx_of_match[] = {
245	{ .compatible = "amlogic,g12a-tohdmitx", },
246	{}
247};
248MODULE_DEVICE_TABLE(of, g12a_tohdmitx_of_match);
249
250static int g12a_tohdmitx_probe(struct platform_device *pdev)
251{
252	struct device *dev = &pdev->dev;
253	void __iomem *regs;
254	struct regmap *map;
255	int ret;
256
257	ret = device_reset(dev);
258	if (ret)
259		return ret;
260
261	regs = devm_platform_ioremap_resource(pdev, 0);
262	if (IS_ERR(regs))
263		return PTR_ERR(regs);
264
265	map = devm_regmap_init_mmio(dev, regs, &g12a_tohdmitx_regmap_cfg);
266	if (IS_ERR(map)) {
267		dev_err(dev, "failed to init regmap: %ld\n",
268			PTR_ERR(map));
269		return PTR_ERR(map);
270	}
271
272	return devm_snd_soc_register_component(dev,
273			&g12a_tohdmitx_component_drv, g12a_tohdmitx_dai_drv,
274			ARRAY_SIZE(g12a_tohdmitx_dai_drv));
275}
276
277static struct platform_driver g12a_tohdmitx_pdrv = {
278	.driver = {
279		.name = G12A_TOHDMITX_DRV_NAME,
280		.of_match_table = g12a_tohdmitx_of_match,
281	},
282	.probe = g12a_tohdmitx_probe,
283};
284module_platform_driver(g12a_tohdmitx_pdrv);
285
286MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
287MODULE_DESCRIPTION("Amlogic G12a To HDMI Tx Control Codec Driver");
288MODULE_LICENSE("GPL v2");
289