1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * omap3pandora.c -- SoC audio for Pandora Handheld Console 4 * 5 * Author: Gražvydas Ignotas <notasas@gmail.com> 6 */ 7 8 #include <linux/clk.h> 9 #include <linux/platform_device.h> 10 #include <linux/gpio/consumer.h> 11 #include <linux/delay.h> 12 #include <linux/regulator/consumer.h> 13 #include <linux/module.h> 14 15 #include <sound/core.h> 16 #include <sound/pcm.h> 17 #include <sound/soc.h> 18 19 #include <asm/mach-types.h> 20 #include <linux/platform_data/asoc-ti-mcbsp.h> 21 22 #include "omap-mcbsp.h" 23 24 #define PREFIX "ASoC omap3pandora: " 25 26 static struct regulator *omap3pandora_dac_reg; 27 static struct gpio_desc *dac_power_gpio; 28 static struct gpio_desc *amp_power_gpio; 29 30 static int omap3pandora_hw_params(struct snd_pcm_substream *substream, 31 struct snd_pcm_hw_params *params) 32 { 33 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 34 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); 35 struct snd_soc_dai *cpu_dai = snd_soc_rtd_to_cpu(rtd, 0); 36 int ret; 37 38 /* Set the codec system clock for DAC and ADC */ 39 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 26000000, 40 SND_SOC_CLOCK_IN); 41 if (ret < 0) { 42 pr_err(PREFIX "can't set codec system clock\n"); 43 return ret; 44 } 45 46 /* Set McBSP clock to external */ 47 ret = snd_soc_dai_set_sysclk(cpu_dai, OMAP_MCBSP_SYSCLK_CLKS_EXT, 48 256 * params_rate(params), 49 SND_SOC_CLOCK_IN); 50 if (ret < 0) { 51 pr_err(PREFIX "can't set cpu system clock\n"); 52 return ret; 53 } 54 55 ret = snd_soc_dai_set_clkdiv(cpu_dai, OMAP_MCBSP_CLKGDV, 8); 56 if (ret < 0) { 57 pr_err(PREFIX "can't set SRG clock divider\n"); 58 return ret; 59 } 60 61 return 0; 62 } 63 64 static int omap3pandora_dac_event(struct snd_soc_dapm_widget *w, 65 struct snd_kcontrol *k, int event) 66 { 67 int ret; 68 69 /* 70 * The PCM1773 DAC datasheet requires 1ms delay between switching 71 * VCC power on/off and /PD pin high/low 72 */ 73 if (SND_SOC_DAPM_EVENT_ON(event)) { 74 ret = regulator_enable(omap3pandora_dac_reg); 75 if (ret) { 76 dev_err(w->dapm->dev, "Failed to power DAC: %d\n", ret); 77 return ret; 78 } 79 mdelay(1); 80 gpiod_set_value(dac_power_gpio, 1); 81 } else { 82 gpiod_set_value(dac_power_gpio, 0); 83 mdelay(1); 84 regulator_disable(omap3pandora_dac_reg); 85 } 86 87 return 0; 88 } 89 90 static int omap3pandora_hp_event(struct snd_soc_dapm_widget *w, 91 struct snd_kcontrol *k, int event) 92 { 93 if (SND_SOC_DAPM_EVENT_ON(event)) 94 gpiod_set_value(amp_power_gpio, 1); 95 else 96 gpiod_set_value(amp_power_gpio, 0); 97 98 return 0; 99 } 100 101 /* 102 * Audio paths on Pandora board: 103 * 104 * |O| ---> PCM DAC +-> AMP -> Headphone Jack 105 * |M| A +--------> Line Out 106 * |A| <~~clk~~+ 107 * |P| <--- TWL4030 <--------- Line In and MICs 108 */ 109 static const struct snd_soc_dapm_widget omap3pandora_dapm_widgets[] = { 110 SND_SOC_DAPM_DAC_E("PCM DAC", "HiFi Playback", SND_SOC_NOPM, 111 0, 0, omap3pandora_dac_event, 112 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 113 SND_SOC_DAPM_PGA_E("Headphone Amplifier", SND_SOC_NOPM, 114 0, 0, NULL, 0, omap3pandora_hp_event, 115 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 116 SND_SOC_DAPM_HP("Headphone Jack", NULL), 117 SND_SOC_DAPM_LINE("Line Out", NULL), 118 119 SND_SOC_DAPM_MIC("Mic (internal)", NULL), 120 SND_SOC_DAPM_MIC("Mic (external)", NULL), 121 SND_SOC_DAPM_LINE("Line In", NULL), 122 }; 123 124 static const struct snd_soc_dapm_route omap3pandora_map[] = { 125 {"PCM DAC", NULL, "APLL Enable"}, 126 {"Headphone Amplifier", NULL, "PCM DAC"}, 127 {"Line Out", NULL, "PCM DAC"}, 128 {"Headphone Jack", NULL, "Headphone Amplifier"}, 129 130 {"AUXL", NULL, "Line In"}, 131 {"AUXR", NULL, "Line In"}, 132 133 {"MAINMIC", NULL, "Mic (internal)"}, 134 {"Mic (internal)", NULL, "Mic Bias 1"}, 135 136 {"SUBMIC", NULL, "Mic (external)"}, 137 {"Mic (external)", NULL, "Mic Bias 2"}, 138 }; 139 140 static int omap3pandora_out_init(struct snd_soc_pcm_runtime *rtd) 141 { 142 struct snd_soc_dapm_context *dapm = &rtd->card->dapm; 143 144 /* All TWL4030 output pins are floating */ 145 snd_soc_dapm_nc_pin(dapm, "EARPIECE"); 146 snd_soc_dapm_nc_pin(dapm, "PREDRIVEL"); 147 snd_soc_dapm_nc_pin(dapm, "PREDRIVER"); 148 snd_soc_dapm_nc_pin(dapm, "HSOL"); 149 snd_soc_dapm_nc_pin(dapm, "HSOR"); 150 snd_soc_dapm_nc_pin(dapm, "CARKITL"); 151 snd_soc_dapm_nc_pin(dapm, "CARKITR"); 152 snd_soc_dapm_nc_pin(dapm, "HFL"); 153 snd_soc_dapm_nc_pin(dapm, "HFR"); 154 snd_soc_dapm_nc_pin(dapm, "VIBRA"); 155 156 return 0; 157 } 158 159 static int omap3pandora_in_init(struct snd_soc_pcm_runtime *rtd) 160 { 161 struct snd_soc_dapm_context *dapm = &rtd->card->dapm; 162 163 /* Not comnnected */ 164 snd_soc_dapm_nc_pin(dapm, "HSMIC"); 165 snd_soc_dapm_nc_pin(dapm, "CARKITMIC"); 166 snd_soc_dapm_nc_pin(dapm, "DIGIMIC0"); 167 snd_soc_dapm_nc_pin(dapm, "DIGIMIC1"); 168 169 return 0; 170 } 171 172 static const struct snd_soc_ops omap3pandora_ops = { 173 .hw_params = omap3pandora_hw_params, 174 }; 175 176 /* Digital audio interface glue - connects codec <--> CPU */ 177 SND_SOC_DAILINK_DEFS(out, 178 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.2")), 179 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")), 180 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.2"))); 181 182 SND_SOC_DAILINK_DEFS(in, 183 DAILINK_COMP_ARRAY(COMP_CPU("omap-mcbsp.4")), 184 DAILINK_COMP_ARRAY(COMP_CODEC("twl4030-codec", "twl4030-hifi")), 185 DAILINK_COMP_ARRAY(COMP_PLATFORM("omap-mcbsp.4"))); 186 187 static struct snd_soc_dai_link omap3pandora_dai[] = { 188 { 189 .name = "PCM1773", 190 .stream_name = "HiFi Out", 191 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 192 SND_SOC_DAIFMT_CBS_CFS, 193 .ops = &omap3pandora_ops, 194 .init = omap3pandora_out_init, 195 SND_SOC_DAILINK_REG(out), 196 }, { 197 .name = "TWL4030", 198 .stream_name = "Line/Mic In", 199 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 200 SND_SOC_DAIFMT_CBS_CFS, 201 .ops = &omap3pandora_ops, 202 .init = omap3pandora_in_init, 203 SND_SOC_DAILINK_REG(in), 204 } 205 }; 206 207 /* SoC card */ 208 static struct snd_soc_card snd_soc_card_omap3pandora = { 209 .name = "omap3pandora", 210 .owner = THIS_MODULE, 211 .dai_link = omap3pandora_dai, 212 .num_links = ARRAY_SIZE(omap3pandora_dai), 213 214 .dapm_widgets = omap3pandora_dapm_widgets, 215 .num_dapm_widgets = ARRAY_SIZE(omap3pandora_dapm_widgets), 216 .dapm_routes = omap3pandora_map, 217 .num_dapm_routes = ARRAY_SIZE(omap3pandora_map), 218 }; 219 220 static struct platform_device *omap3pandora_snd_device; 221 222 static int __init omap3pandora_soc_init(void) 223 { 224 int ret; 225 226 if (!machine_is_omap3_pandora()) 227 return -ENODEV; 228 229 pr_info("OMAP3 Pandora SoC init\n"); 230 231 omap3pandora_snd_device = platform_device_alloc("soc-audio", -1); 232 if (omap3pandora_snd_device == NULL) { 233 pr_err(PREFIX "Platform device allocation failed\n"); 234 return -ENOMEM; 235 } 236 237 platform_set_drvdata(omap3pandora_snd_device, &snd_soc_card_omap3pandora); 238 239 ret = platform_device_add(omap3pandora_snd_device); 240 if (ret) { 241 pr_err(PREFIX "Unable to add platform device\n"); 242 goto fail2; 243 } 244 245 dac_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev, 246 "dac", GPIOD_OUT_LOW); 247 if (IS_ERR(dac_power_gpio)) { 248 ret = PTR_ERR(dac_power_gpio); 249 goto fail3; 250 } 251 252 amp_power_gpio = devm_gpiod_get(&omap3pandora_snd_device->dev, 253 "amp", GPIOD_OUT_LOW); 254 if (IS_ERR(amp_power_gpio)) { 255 ret = PTR_ERR(amp_power_gpio); 256 goto fail3; 257 } 258 259 omap3pandora_dac_reg = regulator_get(&omap3pandora_snd_device->dev, "vcc"); 260 if (IS_ERR(omap3pandora_dac_reg)) { 261 pr_err(PREFIX "Failed to get DAC regulator from %s: %ld\n", 262 dev_name(&omap3pandora_snd_device->dev), 263 PTR_ERR(omap3pandora_dac_reg)); 264 ret = PTR_ERR(omap3pandora_dac_reg); 265 goto fail3; 266 } 267 268 return 0; 269 270 fail3: 271 platform_device_del(omap3pandora_snd_device); 272 fail2: 273 platform_device_put(omap3pandora_snd_device); 274 275 return ret; 276 } 277 module_init(omap3pandora_soc_init); 278 279 static void __exit omap3pandora_soc_exit(void) 280 { 281 regulator_put(omap3pandora_dac_reg); 282 platform_device_unregister(omap3pandora_snd_device); 283 } 284 module_exit(omap3pandora_soc_exit); 285 286 MODULE_AUTHOR("Grazvydas Ignotas <notasas@gmail.com>"); 287 MODULE_DESCRIPTION("ALSA SoC OMAP3 Pandora"); 288 MODULE_LICENSE("GPL"); 289