1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * arizona-spi.c -- Arizona SPI bus interface 4 * 5 * Copyright 2012 Wolfson Microelectronics plc 6 * 7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> 8 */ 9 10 #include <linux/acpi.h> 11 #include <linux/err.h> 12 #include <linux/gpio/consumer.h> 13 #include <linux/gpio/machine.h> 14 #include <linux/module.h> 15 #include <linux/pm_runtime.h> 16 #include <linux/regmap.h> 17 #include <linux/regulator/consumer.h> 18 #include <linux/slab.h> 19 #include <linux/spi/spi.h> 20 #include <linux/of.h> 21 #include <uapi/linux/input-event-codes.h> 22 23 #include <linux/mfd/arizona/core.h> 24 25 #include "arizona.h" 26 27 #ifdef CONFIG_ACPI 28 static const struct acpi_gpio_params reset_gpios = { 1, 0, false }; 29 static const struct acpi_gpio_params ldoena_gpios = { 2, 0, false }; 30 31 static const struct acpi_gpio_mapping arizona_acpi_gpios[] = { 32 { "reset-gpios", &reset_gpios, 1, }, 33 { "wlf,ldoena-gpios", &ldoena_gpios, 1 }, 34 { } 35 }; 36 37 /* 38 * The ACPI resources for the device only describe external GPIO-s. They do 39 * not provide mappings for the GPIO-s coming from the Arizona codec itself. 40 */ 41 static const struct gpiod_lookup arizona_soc_gpios[] = { 42 { "arizona", 2, "wlf,spkvdd-ena", 0, GPIO_ACTIVE_HIGH }, 43 { "arizona", 4, "wlf,micd-pol", 0, GPIO_ACTIVE_LOW }, 44 }; 45 46 static void arizona_spi_acpi_remove_lookup(void *lookup) 47 { 48 gpiod_remove_lookup_table(lookup); 49 } 50 51 /* For ACPI tables from boards which ship with Windows as factory OS */ 52 static int arizona_spi_acpi_windows_probe(struct arizona *arizona) 53 { 54 struct gpiod_lookup_table *lookup; 55 acpi_status status; 56 int ret; 57 58 /* Add mappings for the 2 ACPI declared GPIOs used for reset and ldo-ena */ 59 devm_acpi_dev_add_driver_gpios(arizona->dev, arizona_acpi_gpios); 60 61 /* Add lookups for the SoCs own GPIOs used for micdet-polarity and spkVDD-enable */ 62 lookup = devm_kzalloc(arizona->dev, 63 struct_size(lookup, table, ARRAY_SIZE(arizona_soc_gpios) + 1), 64 GFP_KERNEL); 65 if (!lookup) 66 return -ENOMEM; 67 68 lookup->dev_id = dev_name(arizona->dev); 69 memcpy(lookup->table, arizona_soc_gpios, sizeof(arizona_soc_gpios)); 70 71 gpiod_add_lookup_table(lookup); 72 ret = devm_add_action_or_reset(arizona->dev, arizona_spi_acpi_remove_lookup, lookup); 73 if (ret) 74 return ret; 75 76 /* Enable 32KHz clock from SoC to codec for jack-detect */ 77 status = acpi_evaluate_object(ACPI_HANDLE(arizona->dev), "CLKE", NULL, NULL); 78 if (ACPI_FAILURE(status)) 79 dev_warn(arizona->dev, "Failed to enable 32KHz clk ACPI error %d\n", status); 80 81 return 0; 82 } 83 84 /* For ACPI tables from boards which ship with Android as factory OS */ 85 static int arizona_spi_acpi_android_probe(struct arizona *arizona) 86 { 87 int ret; 88 89 /* 90 * Get the reset GPIO, treating -ENOENT as -EPROBE_DEFER to wait for 91 * the x86-android-tablets module to register the board specific GPIO 92 * lookup table. 93 */ 94 arizona->pdata.reset = devm_gpiod_get(arizona->dev, "reset", GPIOD_OUT_LOW); 95 if (IS_ERR(arizona->pdata.reset)) { 96 ret = PTR_ERR(arizona->pdata.reset); 97 if (ret == -ENOENT) { 98 dev_info_once(arizona->dev, 99 "Deferring probe till GPIO lookup is registered\n"); 100 ret = -EPROBE_DEFER; 101 } 102 return dev_err_probe(arizona->dev, ret, "getting reset GPIO\n"); 103 } 104 105 return 0; 106 } 107 108 /* 109 * The AOSP 3.5 mm Headset: Accessory Specification gives the following values: 110 * Function A Play/Pause: 0 ohm 111 * Function D Voice assistant: 135 ohm 112 * Function B Volume Up 240 ohm 113 * Function C Volume Down 470 ohm 114 * Minimum Mic DC resistance 1000 ohm 115 * Minimum Ear speaker impedance 16 ohm 116 * Note the first max value below must be less then the min. speaker impedance, 117 * to allow CTIA/OMTP detection to work. The other max values are the closest 118 * value from extcon-arizona.c:arizona_micd_levels halfway 2 button resistances. 119 */ 120 static const struct arizona_micd_range arizona_micd_aosp_ranges[] = { 121 { .max = 11, .key = KEY_PLAYPAUSE }, 122 { .max = 186, .key = KEY_VOICECOMMAND }, 123 { .max = 348, .key = KEY_VOLUMEUP }, 124 { .max = 752, .key = KEY_VOLUMEDOWN }, 125 }; 126 127 static int arizona_spi_acpi_probe(struct arizona *arizona) 128 { 129 struct acpi_device *adev = ACPI_COMPANION(arizona->dev); 130 int ret; 131 132 if (acpi_dev_hid_uid_match(adev, "10WM5102", NULL)) 133 ret = arizona_spi_acpi_android_probe(arizona); 134 else 135 ret = arizona_spi_acpi_windows_probe(arizona); 136 137 if (ret) 138 return ret; 139 140 /* 141 * Some DSDTs wrongly declare the IRQ trigger-type as IRQF_TRIGGER_FALLING 142 * The IRQ line will stay low when a new IRQ event happens between reading 143 * the IRQ status flags and acknowledging them. When the IRQ line stays 144 * low like this the IRQ will never trigger again when its type is set 145 * to IRQF_TRIGGER_FALLING. Correct the IRQ trigger-type to fix this. 146 * 147 * Note theoretically it is possible that some boards are not capable 148 * of handling active low level interrupts. In that case setting the 149 * flag to IRQF_TRIGGER_FALLING would not be a bug (and we would need 150 * to work around this) but so far all known usages of IRQF_TRIGGER_FALLING 151 * are a bug in the board's DSDT. 152 */ 153 arizona->pdata.irq_flags = IRQF_TRIGGER_LOW; 154 155 /* Wait 200 ms after jack insertion */ 156 arizona->pdata.micd_detect_debounce = 200; 157 158 /* Use standard AOSP values for headset-button mappings */ 159 arizona->pdata.micd_ranges = arizona_micd_aosp_ranges; 160 arizona->pdata.num_micd_ranges = ARRAY_SIZE(arizona_micd_aosp_ranges); 161 162 return 0; 163 } 164 165 static const struct acpi_device_id arizona_acpi_match[] = { 166 { 167 .id = "WM510204", 168 .driver_data = WM5102, 169 }, 170 { 171 .id = "WM510205", 172 .driver_data = WM5102, 173 }, 174 { 175 .id = "10WM5102", 176 .driver_data = WM5102, 177 }, 178 { } 179 }; 180 MODULE_DEVICE_TABLE(acpi, arizona_acpi_match); 181 #else 182 static int arizona_spi_acpi_probe(struct arizona *arizona) 183 { 184 return -ENODEV; 185 } 186 #endif 187 188 static int arizona_spi_probe(struct spi_device *spi) 189 { 190 const struct spi_device_id *id = spi_get_device_id(spi); 191 const void *match_data; 192 struct arizona *arizona; 193 const struct regmap_config *regmap_config = NULL; 194 unsigned long type = 0; 195 int ret; 196 197 match_data = device_get_match_data(&spi->dev); 198 if (match_data) 199 type = (unsigned long)match_data; 200 else if (id) 201 type = id->driver_data; 202 203 switch (type) { 204 case WM5102: 205 if (IS_ENABLED(CONFIG_MFD_WM5102)) 206 regmap_config = &wm5102_spi_regmap; 207 break; 208 case WM5110: 209 case WM8280: 210 if (IS_ENABLED(CONFIG_MFD_WM5110)) 211 regmap_config = &wm5110_spi_regmap; 212 break; 213 case WM1831: 214 case CS47L24: 215 if (IS_ENABLED(CONFIG_MFD_CS47L24)) 216 regmap_config = &cs47l24_spi_regmap; 217 break; 218 default: 219 dev_err(&spi->dev, "Unknown device type %ld\n", type); 220 return -EINVAL; 221 } 222 223 if (!regmap_config) { 224 dev_err(&spi->dev, 225 "No kernel support for device type %ld\n", type); 226 return -EINVAL; 227 } 228 229 arizona = devm_kzalloc(&spi->dev, sizeof(*arizona), GFP_KERNEL); 230 if (arizona == NULL) 231 return -ENOMEM; 232 233 arizona->regmap = devm_regmap_init_spi(spi, regmap_config); 234 if (IS_ERR(arizona->regmap)) { 235 ret = PTR_ERR(arizona->regmap); 236 dev_err(&spi->dev, "Failed to allocate register map: %d\n", 237 ret); 238 return ret; 239 } 240 241 arizona->type = type; 242 arizona->dev = &spi->dev; 243 arizona->irq = spi->irq; 244 245 if (has_acpi_companion(&spi->dev)) { 246 ret = arizona_spi_acpi_probe(arizona); 247 if (ret) 248 return ret; 249 } 250 251 return arizona_dev_init(arizona); 252 } 253 254 static void arizona_spi_remove(struct spi_device *spi) 255 { 256 struct arizona *arizona = spi_get_drvdata(spi); 257 258 arizona_dev_exit(arizona); 259 } 260 261 static const struct spi_device_id arizona_spi_ids[] = { 262 { "wm5102", WM5102 }, 263 { "wm5110", WM5110 }, 264 { "wm8280", WM8280 }, 265 { "wm1831", WM1831 }, 266 { "cs47l24", CS47L24 }, 267 { }, 268 }; 269 MODULE_DEVICE_TABLE(spi, arizona_spi_ids); 270 271 #ifdef CONFIG_OF 272 static const struct of_device_id arizona_spi_of_match[] = { 273 { .compatible = "wlf,wm5102", .data = (void *)WM5102 }, 274 { .compatible = "wlf,wm5110", .data = (void *)WM5110 }, 275 { .compatible = "wlf,wm8280", .data = (void *)WM8280 }, 276 { .compatible = "wlf,wm1831", .data = (void *)WM1831 }, 277 { .compatible = "cirrus,cs47l24", .data = (void *)CS47L24 }, 278 {}, 279 }; 280 #endif 281 282 static struct spi_driver arizona_spi_driver = { 283 .driver = { 284 .name = "arizona", 285 .pm = &arizona_pm_ops, 286 .of_match_table = of_match_ptr(arizona_spi_of_match), 287 .acpi_match_table = ACPI_PTR(arizona_acpi_match), 288 }, 289 .probe = arizona_spi_probe, 290 .remove = arizona_spi_remove, 291 .id_table = arizona_spi_ids, 292 }; 293 294 module_spi_driver(arizona_spi_driver); 295 296 MODULE_SOFTDEP("pre: arizona_ldo1"); 297 MODULE_DESCRIPTION("Arizona SPI bus interface"); 298 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 299 MODULE_LICENSE("GPL"); 300