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