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