1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright (c) 2020 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/regulator/consumer.h>
12#include <linux/reset.h>
13#include <sound/soc.h>
14#include <sound/soc-dai.h>
15
16#include <dt-bindings/sound/meson-g12a-toacodec.h>
17#include "axg-tdm.h"
18#include "meson-codec-glue.h"
19
20#define G12A_TOACODEC_DRV_NAME "g12a-toacodec"
21
22#define TOACODEC_CTRL0			0x0
23#define  CTRL0_ENABLE_SHIFT		31
24#define  CTRL0_DAT_SEL_SM1_MSB		19
25#define  CTRL0_DAT_SEL_SM1_LSB		18
26#define  CTRL0_DAT_SEL_MSB		15
27#define  CTRL0_DAT_SEL_LSB		14
28#define  CTRL0_LANE_SEL_SM1		16
29#define  CTRL0_LANE_SEL			12
30#define  CTRL0_LRCLK_SEL_SM1_MSB	14
31#define  CTRL0_LRCLK_SEL_SM1_LSB	12
32#define  CTRL0_LRCLK_SEL_MSB		9
33#define  CTRL0_LRCLK_SEL_LSB		8
34#define  CTRL0_LRCLK_INV_SM1		BIT(10)
35#define  CTRL0_BLK_CAP_INV_SM1		BIT(9)
36#define  CTRL0_BLK_CAP_INV		BIT(7)
37#define  CTRL0_BCLK_O_INV_SM1		BIT(8)
38#define  CTRL0_BCLK_O_INV		BIT(6)
39#define  CTRL0_BCLK_SEL_SM1_MSB		6
40#define  CTRL0_BCLK_SEL_MSB		5
41#define  CTRL0_BCLK_SEL_LSB		4
42#define  CTRL0_MCLK_SEL			GENMASK(2, 0)
43
44#define TOACODEC_OUT_CHMAX		2
45
46struct g12a_toacodec {
47	struct regmap_field *field_dat_sel;
48	struct regmap_field *field_lrclk_sel;
49	struct regmap_field *field_bclk_sel;
50};
51
52struct g12a_toacodec_match_data {
53	const struct snd_soc_component_driver *component_drv;
54	struct reg_field field_dat_sel;
55	struct reg_field field_lrclk_sel;
56	struct reg_field field_bclk_sel;
57};
58
59static const char * const g12a_toacodec_mux_texts[] = {
60	"I2S A", "I2S B", "I2S C",
61};
62
63static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
64				      struct snd_ctl_elem_value *ucontrol)
65{
66	struct snd_soc_component *component =
67		snd_soc_dapm_kcontrol_component(kcontrol);
68	struct g12a_toacodec *priv = snd_soc_component_get_drvdata(component);
69	struct snd_soc_dapm_context *dapm =
70		snd_soc_dapm_kcontrol_dapm(kcontrol);
71	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
72	unsigned int mux, reg;
73
74	if (ucontrol->value.enumerated.item[0] >= e->items)
75		return -EINVAL;
76
77	mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
78	regmap_field_read(priv->field_dat_sel, &reg);
79
80	if (mux == reg)
81		return 0;
82
83	/* Force disconnect of the mux while updating */
84	snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
85
86	regmap_field_write(priv->field_dat_sel, mux);
87	regmap_field_write(priv->field_lrclk_sel, mux);
88	regmap_field_write(priv->field_bclk_sel, mux);
89
90	/*
91	 * FIXME:
92	 * On this soc, the glue gets the MCLK directly from the clock
93	 * controller instead of going the through the TDM interface.
94	 *
95	 * Here we assume interface A uses clock A, etc ... While it is
96	 * true for now, it could be different. Instead the glue should
97	 * find out the clock used by the interface and select the same
98	 * source. For that, we will need regmap backed clock mux which
99	 * is a work in progress
100	 */
101	snd_soc_component_update_bits(component, e->reg,
102				      CTRL0_MCLK_SEL,
103				      FIELD_PREP(CTRL0_MCLK_SEL, mux));
104
105	snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
106
107	return 1;
108}
109
110static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
111			    CTRL0_DAT_SEL_LSB,
112			    g12a_toacodec_mux_texts);
113
114static SOC_ENUM_SINGLE_DECL(sm1_toacodec_mux_enum, TOACODEC_CTRL0,
115			    CTRL0_DAT_SEL_SM1_LSB,
116			    g12a_toacodec_mux_texts);
117
118static const struct snd_kcontrol_new g12a_toacodec_mux =
119	SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
120			  snd_soc_dapm_get_enum_double,
121			  g12a_toacodec_mux_put_enum);
122
123static const struct snd_kcontrol_new sm1_toacodec_mux =
124	SOC_DAPM_ENUM_EXT("Source", sm1_toacodec_mux_enum,
125			  snd_soc_dapm_get_enum_double,
126			  g12a_toacodec_mux_put_enum);
127
128static const struct snd_kcontrol_new g12a_toacodec_out_enable =
129	SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
130				    CTRL0_ENABLE_SHIFT, 1, 0);
131
132static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
133	SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
134			 &g12a_toacodec_mux),
135	SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
136			    &g12a_toacodec_out_enable),
137};
138
139static const struct snd_soc_dapm_widget sm1_toacodec_widgets[] = {
140	SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
141			 &sm1_toacodec_mux),
142	SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
143			    &g12a_toacodec_out_enable),
144};
145
146static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
147					 struct snd_pcm_hw_params *params,
148					 struct snd_soc_dai *dai)
149{
150	struct meson_codec_glue_input *data;
151	int ret;
152
153	ret = meson_codec_glue_input_hw_params(substream, params, dai);
154	if (ret)
155		return ret;
156
157	/* The glue will provide 1 lane out of the 4 to the output */
158	data = meson_codec_glue_input_get_data(dai);
159	data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
160					data->params.channels_min);
161	data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
162					data->params.channels_max);
163
164	return 0;
165}
166
167static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
168	.probe		= meson_codec_glue_input_dai_probe,
169	.remove		= meson_codec_glue_input_dai_remove,
170	.hw_params	= g12a_toacodec_input_hw_params,
171	.set_fmt	= meson_codec_glue_input_set_fmt,
172};
173
174static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
175	.startup	= meson_codec_glue_output_startup,
176};
177
178#define TOACODEC_STREAM(xname, xsuffix, xchmax)			\
179{								\
180	.stream_name	= xname " " xsuffix,			\
181	.channels_min	= 1,					\
182	.channels_max	= (xchmax),				\
183	.rate_min       = 5512,					\
184	.rate_max	= 192000,				\
185	.formats	= AXG_TDM_FORMATS,			\
186}
187
188#define TOACODEC_INPUT(xname, xid) {					\
189	.name = xname,							\
190	.id = (xid),							\
191	.playback = TOACODEC_STREAM(xname, "Playback", 8),		\
192	.ops = &g12a_toacodec_input_ops,				\
193}
194
195#define TOACODEC_OUTPUT(xname, xid) {					\
196	.name = xname,							\
197	.id = (xid),							\
198	.capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
199	.ops = &g12a_toacodec_output_ops,				\
200}
201
202static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
203	TOACODEC_INPUT("IN A", TOACODEC_IN_A),
204	TOACODEC_INPUT("IN B", TOACODEC_IN_B),
205	TOACODEC_INPUT("IN C", TOACODEC_IN_C),
206	TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
207};
208
209static int g12a_toacodec_component_probe(struct snd_soc_component *c)
210{
211	/* Initialize the static clock parameters */
212	return snd_soc_component_write(c, TOACODEC_CTRL0,
213				       CTRL0_BLK_CAP_INV);
214}
215
216static int sm1_toacodec_component_probe(struct snd_soc_component *c)
217{
218	/* Initialize the static clock parameters */
219	return snd_soc_component_write(c, TOACODEC_CTRL0,
220				       CTRL0_BLK_CAP_INV_SM1);
221}
222
223static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
224	{ "SRC", "I2S A", "IN A Playback" },
225	{ "SRC", "I2S B", "IN B Playback" },
226	{ "SRC", "I2S C", "IN C Playback" },
227	{ "OUT EN", "Switch", "SRC" },
228	{ "OUT Capture", NULL, "OUT EN" },
229};
230
231static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
232	SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
233};
234
235static const struct snd_kcontrol_new sm1_toacodec_controls[] = {
236	SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL_SM1, 3, 0),
237};
238
239static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
240	.probe			= g12a_toacodec_component_probe,
241	.controls		= g12a_toacodec_controls,
242	.num_controls		= ARRAY_SIZE(g12a_toacodec_controls),
243	.dapm_widgets		= g12a_toacodec_widgets,
244	.num_dapm_widgets	= ARRAY_SIZE(g12a_toacodec_widgets),
245	.dapm_routes		= g12a_toacodec_routes,
246	.num_dapm_routes	= ARRAY_SIZE(g12a_toacodec_routes),
247	.endianness		= 1,
248};
249
250static const struct snd_soc_component_driver sm1_toacodec_component_drv = {
251	.probe			= sm1_toacodec_component_probe,
252	.controls		= sm1_toacodec_controls,
253	.num_controls		= ARRAY_SIZE(sm1_toacodec_controls),
254	.dapm_widgets		= sm1_toacodec_widgets,
255	.num_dapm_widgets	= ARRAY_SIZE(sm1_toacodec_widgets),
256	.dapm_routes		= g12a_toacodec_routes,
257	.num_dapm_routes	= ARRAY_SIZE(g12a_toacodec_routes),
258	.endianness		= 1,
259};
260
261static const struct regmap_config g12a_toacodec_regmap_cfg = {
262	.reg_bits	= 32,
263	.val_bits	= 32,
264	.reg_stride	= 4,
265};
266
267static const struct g12a_toacodec_match_data g12a_toacodec_match_data = {
268	.component_drv	= &g12a_toacodec_component_drv,
269	.field_dat_sel	= REG_FIELD(TOACODEC_CTRL0, 14, 15),
270	.field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 8, 9),
271	.field_bclk_sel	= REG_FIELD(TOACODEC_CTRL0, 4, 5),
272};
273
274static const struct g12a_toacodec_match_data sm1_toacodec_match_data = {
275	.component_drv	= &sm1_toacodec_component_drv,
276	.field_dat_sel	= REG_FIELD(TOACODEC_CTRL0, 18, 19),
277	.field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 12, 14),
278	.field_bclk_sel	= REG_FIELD(TOACODEC_CTRL0, 4, 6),
279};
280
281static const struct of_device_id g12a_toacodec_of_match[] = {
282	{
283		.compatible = "amlogic,g12a-toacodec",
284		.data = &g12a_toacodec_match_data,
285	},
286	{
287		.compatible = "amlogic,sm1-toacodec",
288		.data = &sm1_toacodec_match_data,
289	},
290	{}
291};
292MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
293
294static int g12a_toacodec_probe(struct platform_device *pdev)
295{
296	const struct g12a_toacodec_match_data *data;
297	struct device *dev = &pdev->dev;
298	struct g12a_toacodec *priv;
299	void __iomem *regs;
300	struct regmap *map;
301	int ret;
302
303	data = device_get_match_data(dev);
304	if (!data) {
305		dev_err(dev, "failed to match device\n");
306		return -ENODEV;
307	}
308
309	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
310	if (!priv)
311		return -ENOMEM;
312
313	platform_set_drvdata(pdev, priv);
314
315	ret = device_reset(dev);
316	if (ret)
317		return ret;
318
319	regs = devm_platform_ioremap_resource(pdev, 0);
320	if (IS_ERR(regs))
321		return PTR_ERR(regs);
322
323	map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
324	if (IS_ERR(map)) {
325		dev_err(dev, "failed to init regmap: %ld\n",
326			PTR_ERR(map));
327		return PTR_ERR(map);
328	}
329
330	priv->field_dat_sel = devm_regmap_field_alloc(dev, map, data->field_dat_sel);
331	if (IS_ERR(priv->field_dat_sel))
332		return PTR_ERR(priv->field_dat_sel);
333
334	priv->field_lrclk_sel = devm_regmap_field_alloc(dev, map, data->field_lrclk_sel);
335	if (IS_ERR(priv->field_lrclk_sel))
336		return PTR_ERR(priv->field_lrclk_sel);
337
338	priv->field_bclk_sel = devm_regmap_field_alloc(dev, map, data->field_bclk_sel);
339	if (IS_ERR(priv->field_bclk_sel))
340		return PTR_ERR(priv->field_bclk_sel);
341
342	return devm_snd_soc_register_component(dev,
343			data->component_drv, g12a_toacodec_dai_drv,
344			ARRAY_SIZE(g12a_toacodec_dai_drv));
345}
346
347static struct platform_driver g12a_toacodec_pdrv = {
348	.driver = {
349		.name = G12A_TOACODEC_DRV_NAME,
350		.of_match_table = g12a_toacodec_of_match,
351	},
352	.probe = g12a_toacodec_probe,
353};
354module_platform_driver(g12a_toacodec_pdrv);
355
356MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
357MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
358MODULE_LICENSE("GPL v2");
359