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 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 }; 142 143 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 .probe = meson_codec_glue_input_dai_probe, 166 .remove = meson_codec_glue_input_dai_remove, 167 .hw_params = g12a_toacodec_input_hw_params, 168 .set_fmt = meson_codec_glue_input_set_fmt, 169 }; 170 171 static const struct snd_soc_dai_ops g12a_toacodec_output_ops = { 172 .startup = meson_codec_glue_output_startup, 173 }; 174 175 #define TOACODEC_STREAM(xname, xsuffix, xchmax) \ 176 { \ 177 .stream_name = xname " " xsuffix, \ 178 .channels_min = 1, \ 179 .channels_max = (xchmax), \ 180 .rate_min = 5512, \ 181 .rate_max = 192000, \ 182 .formats = AXG_TDM_FORMATS, \ 183 } 184 185 #define TOACODEC_INPUT(xname, xid) { \ 186 .name = xname, \ 187 .id = (xid), \ 188 .playback = TOACODEC_STREAM(xname, "Playback", 8), \ 189 .ops = &g12a_toacodec_input_ops, \ 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 }; 205 206 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 } 212 213 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 }; 246 247 static 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 }; 257 258 static const struct regmap_config g12a_toacodec_regmap_cfg = { 259 .reg_bits = 32, 260 .val_bits = 32, 261 .reg_stride = 4, 262 }; 263 264 static 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 }; 270 271 static 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 }; 277 278 static 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 }; 289 MODULE_DEVICE_TABLE(of, g12a_toacodec_of_match); 290 291 static 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 } 343 344 static 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 }; 351 module_platform_driver(g12a_toacodec_pdrv); 352 353 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 354 MODULE_DESCRIPTION("Amlogic G12a To Internal DAC Codec Driver"); 355 MODULE_LICENSE("GPL v2"); 356