g12a-tohdmitx.c

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