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
g12a_toacodec_mux_put_enum(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)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 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
107 static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
108 CTRL0_DAT_SEL_LSB,
109 g12a_toacodec_mux_texts);
110
111 static SOC_ENUM_SINGLE_DECL(sm1_toacodec_mux_enum, TOACODEC_CTRL0,
112 CTRL0_DAT_SEL_SM1_LSB,
113 g12a_toacodec_mux_texts);
114
115 static 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
120 static 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
125 static const struct snd_kcontrol_new g12a_toacodec_out_enable =
126 SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
127 CTRL0_ENABLE_SHIFT, 1, 0);
128
129 static 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
136 static 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
g12a_toacodec_input_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)143 static 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
164 static 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
169 static 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
199 static 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
g12a_toacodec_component_probe(struct snd_soc_component * c)206 static 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
sm1_toacodec_component_probe(struct snd_soc_component * c)213 static 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
220 static 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
228 static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
229 SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
230 };
231
232 static const struct snd_kcontrol_new sm1_toacodec_controls[] = {
233 SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL_SM1, 3, 0),
234 };
235
236 static 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 .non_legacy_dai_naming = 1,
246 };
247
248 static const struct snd_soc_component_driver sm1_toacodec_component_drv = {
249 .probe = sm1_toacodec_component_probe,
250 .controls = sm1_toacodec_controls,
251 .num_controls = ARRAY_SIZE(sm1_toacodec_controls),
252 .dapm_widgets = sm1_toacodec_widgets,
253 .num_dapm_widgets = ARRAY_SIZE(sm1_toacodec_widgets),
254 .dapm_routes = g12a_toacodec_routes,
255 .num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
256 .endianness = 1,
257 .non_legacy_dai_naming = 1,
258 };
259
260 static const struct regmap_config g12a_toacodec_regmap_cfg = {
261 .reg_bits = 32,
262 .val_bits = 32,
263 .reg_stride = 4,
264 };
265
266 static const struct g12a_toacodec_match_data g12a_toacodec_match_data = {
267 .component_drv = &g12a_toacodec_component_drv,
268 .field_dat_sel = REG_FIELD(TOACODEC_CTRL0, 14, 15),
269 .field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 8, 9),
270 .field_bclk_sel = REG_FIELD(TOACODEC_CTRL0, 4, 5),
271 };
272
273 static const struct g12a_toacodec_match_data sm1_toacodec_match_data = {
274 .component_drv = &sm1_toacodec_component_drv,
275 .field_dat_sel = REG_FIELD(TOACODEC_CTRL0, 18, 19),
276 .field_lrclk_sel = REG_FIELD(TOACODEC_CTRL0, 12, 14),
277 .field_bclk_sel = REG_FIELD(TOACODEC_CTRL0, 4, 6),
278 };
279
280 static const struct of_device_id g12a_toacodec_of_match[] = {
281 {
282 .compatible = "amlogic,g12a-toacodec",
283 .data = &g12a_toacodec_match_data,
284 },
285 {
286 .compatible = "amlogic,sm1-toacodec",
287 .data = &sm1_toacodec_match_data,
288 },
289 {}
290 };
291 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
292
g12a_toacodec_probe(struct platform_device * pdev)293 static int g12a_toacodec_probe(struct platform_device *pdev)
294 {
295 const struct g12a_toacodec_match_data *data;
296 struct device *dev = &pdev->dev;
297 struct g12a_toacodec *priv;
298 void __iomem *regs;
299 struct regmap *map;
300 int ret;
301
302 data = device_get_match_data(dev);
303 if (!data) {
304 dev_err(dev, "failed to match device\n");
305 return -ENODEV;
306 }
307
308 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
309 if (!priv)
310 return -ENOMEM;
311
312 platform_set_drvdata(pdev, priv);
313
314 ret = device_reset(dev);
315 if (ret)
316 return ret;
317
318 regs = devm_platform_ioremap_resource(pdev, 0);
319 if (IS_ERR(regs))
320 return PTR_ERR(regs);
321
322 map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
323 if (IS_ERR(map)) {
324 dev_err(dev, "failed to init regmap: %ld\n",
325 PTR_ERR(map));
326 return PTR_ERR(map);
327 }
328
329 priv->field_dat_sel = devm_regmap_field_alloc(dev, map, data->field_dat_sel);
330 if (IS_ERR(priv->field_dat_sel))
331 return PTR_ERR(priv->field_dat_sel);
332
333 priv->field_lrclk_sel = devm_regmap_field_alloc(dev, map, data->field_lrclk_sel);
334 if (IS_ERR(priv->field_lrclk_sel))
335 return PTR_ERR(priv->field_lrclk_sel);
336
337 priv->field_bclk_sel = devm_regmap_field_alloc(dev, map, data->field_bclk_sel);
338 if (IS_ERR(priv->field_bclk_sel))
339 return PTR_ERR(priv->field_bclk_sel);
340
341 return devm_snd_soc_register_component(dev,
342 data->component_drv, g12a_toacodec_dai_drv,
343 ARRAY_SIZE(g12a_toacodec_dai_drv));
344 }
345
346 static struct platform_driver g12a_toacodec_pdrv = {
347 .driver = {
348 .name = G12A_TOACODEC_DRV_NAME,
349 .of_match_table = g12a_toacodec_of_match,
350 },
351 .probe = g12a_toacodec_probe,
352 };
353 module_platform_driver(g12a_toacodec_pdrv);
354
355 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
356 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
357 MODULE_LICENSE("GPL v2");
358