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
46 struct 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
52 struct 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
59 static const char * const g12a_toacodec_mux_texts[] = {
60 "I2S A", "I2S B", "I2S C",
61 };
62
63 static 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, ®);
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
110 static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
111 CTRL0_DAT_SEL_LSB,
112 g12a_toacodec_mux_texts);
113
114 static SOC_ENUM_SINGLE_DECL(sm1_toacodec_mux_enum, TOACODEC_CTRL0,
115 CTRL0_DAT_SEL_SM1_LSB,
116 g12a_toacodec_mux_texts);
117
118 static 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
123 static 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
128 static const struct snd_kcontrol_new g12a_toacodec_out_enable =
129 SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
130 CTRL0_ENABLE_SHIFT, 1, 0);
131
132 static 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
139 static 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
146 static 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
167 static 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
174 static 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
202 static 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
209 static 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
216 static 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
223 static 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
231 static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
232 SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
233 };
234
235 static const struct snd_kcontrol_new sm1_toacodec_controls[] = {
236 SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL_SM1, 3, 0),
237 };
238
239 static 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
250 static 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
261 static const struct regmap_config g12a_toacodec_regmap_cfg = {
262 .reg_bits = 32,
263 .val_bits = 32,
264 .reg_stride = 4,
265 };
266
267 static 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
274 static 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
281 static 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 };
292 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
293
294 static 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
347 static 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 };
354 module_platform_driver(g12a_toacodec_pdrv);
355
356 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
357 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
358 MODULE_LICENSE("GPL v2");
359
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