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_SHIFT 14
25 #define CTRL0_DAT_SEL (0x3 << CTRL0_DAT_SEL_SHIFT)
26 #define CTRL0_LANE_SEL 12
27 #define CTRL0_LRCLK_SEL GENMASK(9, 8)
28 #define CTRL0_BLK_CAP_INV BIT(7)
29 #define CTRL0_BCLK_O_INV BIT(6)
30 #define CTRL0_BCLK_SEL GENMASK(5, 4)
31 #define CTRL0_MCLK_SEL GENMASK(2, 0)
32
33 #define TOACODEC_OUT_CHMAX 2
34
35 static const char * const g12a_toacodec_mux_texts[] = {
36 "I2S A", "I2S B", "I2S C",
37 };
38
g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)39 static int g12a_toacodec_mux_put_enum(struct snd_kcontrol *kcontrol,
40 struct snd_ctl_elem_value *ucontrol)
41 {
42 struct snd_soc_component *component =
43 snd_soc_dapm_kcontrol_component(kcontrol);
44 struct snd_soc_dapm_context *dapm =
45 snd_soc_dapm_kcontrol_dapm(kcontrol);
46 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
47 unsigned int mux, changed;
48
49 if (ucontrol->value.enumerated.item[0] >= e->items)
50 return -EINVAL;
51
52 mux = snd_soc_enum_item_to_val(e, ucontrol->value.enumerated.item[0]);
53 changed = snd_soc_component_test_bits(component, e->reg,
54 CTRL0_DAT_SEL,
55 FIELD_PREP(CTRL0_DAT_SEL, mux));
56
57 if (!changed)
58 return 0;
59
60 /* Force disconnect of the mux while updating */
61 snd_soc_dapm_mux_update_power(dapm, kcontrol, 0, NULL, NULL);
62
63 snd_soc_component_update_bits(component, e->reg,
64 CTRL0_DAT_SEL |
65 CTRL0_LRCLK_SEL |
66 CTRL0_BCLK_SEL,
67 FIELD_PREP(CTRL0_DAT_SEL, mux) |
68 FIELD_PREP(CTRL0_LRCLK_SEL, mux) |
69 FIELD_PREP(CTRL0_BCLK_SEL, mux));
70
71 /*
72 * FIXME:
73 * On this soc, the glue gets the MCLK directly from the clock
74 * controller instead of going the through the TDM interface.
75 *
76 * Here we assume interface A uses clock A, etc ... While it is
77 * true for now, it could be different. Instead the glue should
78 * find out the clock used by the interface and select the same
79 * source. For that, we will need regmap backed clock mux which
80 * is a work in progress
81 */
82 snd_soc_component_update_bits(component, e->reg,
83 CTRL0_MCLK_SEL,
84 FIELD_PREP(CTRL0_MCLK_SEL, mux));
85
86 snd_soc_dapm_mux_update_power(dapm, kcontrol, mux, e, NULL);
87
88 return 1;
89 }
90
91 static SOC_ENUM_SINGLE_DECL(g12a_toacodec_mux_enum, TOACODEC_CTRL0,
92 CTRL0_DAT_SEL_SHIFT,
93 g12a_toacodec_mux_texts);
94
95 static const struct snd_kcontrol_new g12a_toacodec_mux =
96 SOC_DAPM_ENUM_EXT("Source", g12a_toacodec_mux_enum,
97 snd_soc_dapm_get_enum_double,
98 g12a_toacodec_mux_put_enum);
99
100 static const struct snd_kcontrol_new g12a_toacodec_out_enable =
101 SOC_DAPM_SINGLE_AUTODISABLE("Switch", TOACODEC_CTRL0,
102 CTRL0_ENABLE_SHIFT, 1, 0);
103
104 static const struct snd_soc_dapm_widget g12a_toacodec_widgets[] = {
105 SND_SOC_DAPM_MUX("SRC", SND_SOC_NOPM, 0, 0,
106 &g12a_toacodec_mux),
107 SND_SOC_DAPM_SWITCH("OUT EN", SND_SOC_NOPM, 0, 0,
108 &g12a_toacodec_out_enable),
109 };
110
g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)111 static int g12a_toacodec_input_hw_params(struct snd_pcm_substream *substream,
112 struct snd_pcm_hw_params *params,
113 struct snd_soc_dai *dai)
114 {
115 struct meson_codec_glue_input *data;
116 int ret;
117
118 ret = meson_codec_glue_input_hw_params(substream, params, dai);
119 if (ret)
120 return ret;
121
122 /* The glue will provide 1 lane out of the 4 to the output */
123 data = meson_codec_glue_input_get_data(dai);
124 data->params.channels_min = min_t(unsigned int, TOACODEC_OUT_CHMAX,
125 data->params.channels_min);
126 data->params.channels_max = min_t(unsigned int, TOACODEC_OUT_CHMAX,
127 data->params.channels_max);
128
129 return 0;
130 }
131
132 static const struct snd_soc_dai_ops g12a_toacodec_input_ops = {
133 .hw_params = g12a_toacodec_input_hw_params,
134 .set_fmt = meson_codec_glue_input_set_fmt,
135 };
136
137 static const struct snd_soc_dai_ops g12a_toacodec_output_ops = {
138 .startup = meson_codec_glue_output_startup,
139 };
140
141 #define TOACODEC_STREAM(xname, xsuffix, xchmax) \
142 { \
143 .stream_name = xname " " xsuffix, \
144 .channels_min = 1, \
145 .channels_max = (xchmax), \
146 .rate_min = 5512, \
147 .rate_max = 192000, \
148 .formats = AXG_TDM_FORMATS, \
149 }
150
151 #define TOACODEC_INPUT(xname, xid) { \
152 .name = xname, \
153 .id = (xid), \
154 .playback = TOACODEC_STREAM(xname, "Playback", 8), \
155 .ops = &g12a_toacodec_input_ops, \
156 .probe = meson_codec_glue_input_dai_probe, \
157 .remove = meson_codec_glue_input_dai_remove, \
158 }
159
160 #define TOACODEC_OUTPUT(xname, xid) { \
161 .name = xname, \
162 .id = (xid), \
163 .capture = TOACODEC_STREAM(xname, "Capture", TOACODEC_OUT_CHMAX), \
164 .ops = &g12a_toacodec_output_ops, \
165 }
166
167 static struct snd_soc_dai_driver g12a_toacodec_dai_drv[] = {
168 TOACODEC_INPUT("IN A", TOACODEC_IN_A),
169 TOACODEC_INPUT("IN B", TOACODEC_IN_B),
170 TOACODEC_INPUT("IN C", TOACODEC_IN_C),
171 TOACODEC_OUTPUT("OUT", TOACODEC_OUT),
172 };
173
g12a_toacodec_component_probe(struct snd_soc_component *c)174 static int g12a_toacodec_component_probe(struct snd_soc_component *c)
175 {
176 /* Initialize the static clock parameters */
177 return snd_soc_component_write(c, TOACODEC_CTRL0,
178 CTRL0_BLK_CAP_INV);
179 }
180
181 static const struct snd_soc_dapm_route g12a_toacodec_routes[] = {
182 { "SRC", "I2S A", "IN A Playback" },
183 { "SRC", "I2S B", "IN B Playback" },
184 { "SRC", "I2S C", "IN C Playback" },
185 { "OUT EN", "Switch", "SRC" },
186 { "OUT Capture", NULL, "OUT EN" },
187 };
188
189 static const struct snd_kcontrol_new g12a_toacodec_controls[] = {
190 SOC_SINGLE("Lane Select", TOACODEC_CTRL0, CTRL0_LANE_SEL, 3, 0),
191 };
192
193 static const struct snd_soc_component_driver g12a_toacodec_component_drv = {
194 .probe = g12a_toacodec_component_probe,
195 .controls = g12a_toacodec_controls,
196 .num_controls = ARRAY_SIZE(g12a_toacodec_controls),
197 .dapm_widgets = g12a_toacodec_widgets,
198 .num_dapm_widgets = ARRAY_SIZE(g12a_toacodec_widgets),
199 .dapm_routes = g12a_toacodec_routes,
200 .num_dapm_routes = ARRAY_SIZE(g12a_toacodec_routes),
201 .endianness = 1,
202 .non_legacy_dai_naming = 1,
203 };
204
205 static const struct regmap_config g12a_toacodec_regmap_cfg = {
206 .reg_bits = 32,
207 .val_bits = 32,
208 .reg_stride = 4,
209 };
210
211 static const struct of_device_id g12a_toacodec_of_match[] = {
212 { .compatible = "amlogic,g12a-toacodec", },
213 {}
214 };
215 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match);
216
g12a_toacodec_probe(struct platform_device *pdev)217 static int g12a_toacodec_probe(struct platform_device *pdev)
218 {
219 struct device *dev = &pdev->dev;
220 void __iomem *regs;
221 struct regmap *map;
222 int ret;
223
224 ret = device_reset(dev);
225 if (ret)
226 return ret;
227
228 regs = devm_platform_ioremap_resource(pdev, 0);
229 if (IS_ERR(regs))
230 return PTR_ERR(regs);
231
232 map = devm_regmap_init_mmio(dev, regs, &g12a_toacodec_regmap_cfg);
233 if (IS_ERR(map)) {
234 dev_err(dev, "failed to init regmap: %ld\n",
235 PTR_ERR(map));
236 return PTR_ERR(map);
237 }
238
239 return devm_snd_soc_register_component(dev,
240 &g12a_toacodec_component_drv, g12a_toacodec_dai_drv,
241 ARRAY_SIZE(g12a_toacodec_dai_drv));
242 }
243
244 static struct platform_driver g12a_toacodec_pdrv = {
245 .driver = {
246 .name = G12A_TOACODEC_DRV_NAME,
247 .of_match_table = g12a_toacodec_of_match,
248 },
249 .probe = g12a_toacodec_probe,
250 };
251 module_platform_driver(g12a_toacodec_pdrv);
252
253 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
254 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver");
255 MODULE_LICENSE("GPL v2");
256