Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 1 | /* |
| 2 | * wm8994-core.c -- Device access for Wolfson WM8994 |
| 3 | * |
| 4 | * Copyright 2009 Wolfson Microelectronics PLC. |
| 5 | * |
| 6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/module.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 17 | #include <linux/slab.h> |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 18 | #include <linux/i2c.h> |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 19 | #include <linux/err.h> |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 20 | #include <linux/delay.h> |
| 21 | #include <linux/mfd/core.h> |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 22 | #include <linux/pm_runtime.h> |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 23 | #include <linux/regmap.h> |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 24 | #include <linux/regulator/consumer.h> |
| 25 | #include <linux/regulator/machine.h> |
| 26 | |
| 27 | #include <linux/mfd/wm8994/core.h> |
| 28 | #include <linux/mfd/wm8994/pdata.h> |
| 29 | #include <linux/mfd/wm8994/registers.h> |
| 30 | |
| 31 | static int wm8994_read(struct wm8994 *wm8994, unsigned short reg, |
| 32 | int bytes, void *dest) |
| 33 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 34 | return regmap_raw_read(wm8994->regmap, reg, dest, bytes); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | /** |
| 38 | * wm8994_reg_read: Read a single WM8994 register. |
| 39 | * |
| 40 | * @wm8994: Device to read from. |
| 41 | * @reg: Register to read. |
| 42 | */ |
| 43 | int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) |
| 44 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 45 | unsigned int val; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 46 | int ret; |
| 47 | |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 48 | ret = regmap_read(wm8994->regmap, reg, &val); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 49 | |
| 50 | if (ret < 0) |
| 51 | return ret; |
| 52 | else |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 53 | return val; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 54 | } |
| 55 | EXPORT_SYMBOL_GPL(wm8994_reg_read); |
| 56 | |
| 57 | /** |
| 58 | * wm8994_bulk_read: Read multiple WM8994 registers |
| 59 | * |
| 60 | * @wm8994: Device to read from |
| 61 | * @reg: First register |
| 62 | * @count: Number of registers |
Mark Brown | 316b6cc | 2011-03-18 12:50:10 +0000 | [diff] [blame] | 63 | * @buf: Buffer to fill. The data will be returned big endian. |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 64 | */ |
| 65 | int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, |
| 66 | int count, u16 *buf) |
| 67 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 68 | return regmap_bulk_read(wm8994->regmap, reg, buf, count); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 69 | } |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 70 | |
| 71 | static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 72 | int bytes, const void *src) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 73 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 74 | return regmap_raw_write(wm8994->regmap, reg, src, bytes); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /** |
| 78 | * wm8994_reg_write: Write a single WM8994 register. |
| 79 | * |
| 80 | * @wm8994: Device to write to. |
| 81 | * @reg: Register to write to. |
| 82 | * @val: Value to write. |
| 83 | */ |
| 84 | int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, |
| 85 | unsigned short val) |
| 86 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 87 | return regmap_write(wm8994->regmap, reg, val); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 88 | } |
| 89 | EXPORT_SYMBOL_GPL(wm8994_reg_write); |
| 90 | |
| 91 | /** |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 92 | * wm8994_bulk_write: Write multiple WM8994 registers |
| 93 | * |
| 94 | * @wm8994: Device to write to |
| 95 | * @reg: First register |
| 96 | * @count: Number of registers |
Mark Brown | 4277163 | 2011-03-17 21:42:29 +0000 | [diff] [blame] | 97 | * @buf: Buffer to write from. Data must be big-endian formatted. |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 98 | */ |
| 99 | int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 100 | int count, const u16 *buf) |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 101 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 102 | return regmap_raw_write(wm8994->regmap, reg, buf, count * sizeof(u16)); |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 103 | } |
| 104 | EXPORT_SYMBOL_GPL(wm8994_bulk_write); |
| 105 | |
| 106 | /** |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 107 | * wm8994_set_bits: Set the value of a bitfield in a WM8994 register |
| 108 | * |
| 109 | * @wm8994: Device to write to. |
| 110 | * @reg: Register to write to. |
| 111 | * @mask: Mask of bits to set. |
| 112 | * @val: Value to set (unshifted) |
| 113 | */ |
| 114 | int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, |
| 115 | unsigned short mask, unsigned short val) |
| 116 | { |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 117 | return regmap_update_bits(wm8994->regmap, reg, mask, val); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 118 | } |
| 119 | EXPORT_SYMBOL_GPL(wm8994_set_bits); |
| 120 | |
| 121 | static struct mfd_cell wm8994_regulator_devs[] = { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 122 | { |
| 123 | .name = "wm8994-ldo", |
| 124 | .id = 1, |
| 125 | .pm_runtime_no_callbacks = true, |
| 126 | }, |
| 127 | { |
| 128 | .name = "wm8994-ldo", |
| 129 | .id = 2, |
| 130 | .pm_runtime_no_callbacks = true, |
| 131 | }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 132 | }; |
| 133 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 134 | static struct resource wm8994_codec_resources[] = { |
| 135 | { |
| 136 | .start = WM8994_IRQ_TEMP_SHUT, |
| 137 | .end = WM8994_IRQ_TEMP_WARN, |
| 138 | .flags = IORESOURCE_IRQ, |
| 139 | }, |
| 140 | }; |
| 141 | |
| 142 | static struct resource wm8994_gpio_resources[] = { |
| 143 | { |
| 144 | .start = WM8994_IRQ_GPIO(1), |
| 145 | .end = WM8994_IRQ_GPIO(11), |
| 146 | .flags = IORESOURCE_IRQ, |
| 147 | }, |
| 148 | }; |
| 149 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 150 | static struct mfd_cell wm8994_devs[] = { |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 151 | { |
| 152 | .name = "wm8994-codec", |
| 153 | .num_resources = ARRAY_SIZE(wm8994_codec_resources), |
| 154 | .resources = wm8994_codec_resources, |
| 155 | }, |
| 156 | |
| 157 | { |
| 158 | .name = "wm8994-gpio", |
| 159 | .num_resources = ARRAY_SIZE(wm8994_gpio_resources), |
| 160 | .resources = wm8994_gpio_resources, |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 161 | .pm_runtime_no_callbacks = true, |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 162 | }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 163 | }; |
| 164 | |
| 165 | /* |
| 166 | * Supplies for the main bulk of CODEC; the LDO supplies are ignored |
| 167 | * and should be handled via the standard regulator API supply |
| 168 | * management. |
| 169 | */ |
Mark Brown | b1f43bf | 2011-05-24 17:35:40 +0800 | [diff] [blame] | 170 | static const char *wm1811_main_supplies[] = { |
| 171 | "DBVDD1", |
| 172 | "DBVDD2", |
| 173 | "DBVDD3", |
| 174 | "DCVDD", |
| 175 | "AVDD1", |
| 176 | "AVDD2", |
| 177 | "CPVDD", |
| 178 | "SPKVDD1", |
| 179 | "SPKVDD2", |
| 180 | }; |
| 181 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 182 | static const char *wm8994_main_supplies[] = { |
| 183 | "DBVDD", |
| 184 | "DCVDD", |
| 185 | "AVDD1", |
| 186 | "AVDD2", |
| 187 | "CPVDD", |
| 188 | "SPKVDD1", |
| 189 | "SPKVDD2", |
| 190 | }; |
| 191 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 192 | static const char *wm8958_main_supplies[] = { |
| 193 | "DBVDD1", |
| 194 | "DBVDD2", |
| 195 | "DBVDD3", |
| 196 | "DCVDD", |
| 197 | "AVDD1", |
| 198 | "AVDD2", |
| 199 | "CPVDD", |
| 200 | "SPKVDD1", |
| 201 | "SPKVDD2", |
| 202 | }; |
| 203 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 204 | #ifdef CONFIG_PM |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 205 | static int wm8994_suspend(struct device *dev) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 206 | { |
| 207 | struct wm8994 *wm8994 = dev_get_drvdata(dev); |
| 208 | int ret; |
| 209 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 210 | /* Don't actually go through with the suspend if the CODEC is |
| 211 | * still active (eg, for audio passthrough from CP. */ |
| 212 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); |
| 213 | if (ret < 0) { |
| 214 | dev_err(dev, "Failed to read power status: %d\n", ret); |
| 215 | } else if (ret & WM8994_VMID_SEL_MASK) { |
| 216 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); |
| 217 | return 0; |
| 218 | } |
| 219 | |
Mark Brown | 5f40c6b | 2011-08-13 14:37:48 +0900 | [diff] [blame] | 220 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_4); |
| 221 | if (ret < 0) { |
| 222 | dev_err(dev, "Failed to read power status: %d\n", ret); |
| 223 | } else if (ret & (WM8994_AIF2ADCL_ENA | WM8994_AIF2ADCR_ENA | |
| 224 | WM8994_AIF1ADC2L_ENA | WM8994_AIF1ADC2R_ENA | |
| 225 | WM8994_AIF1ADC1L_ENA | WM8994_AIF1ADC1R_ENA)) { |
| 226 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_5); |
| 231 | if (ret < 0) { |
| 232 | dev_err(dev, "Failed to read power status: %d\n", ret); |
| 233 | } else if (ret & (WM8994_AIF2DACL_ENA | WM8994_AIF2DACR_ENA | |
| 234 | WM8994_AIF1DAC2L_ENA | WM8994_AIF1DAC2R_ENA | |
| 235 | WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA)) { |
| 236 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); |
| 237 | return 0; |
| 238 | } |
| 239 | |
| 240 | switch (wm8994->type) { |
| 241 | case WM8958: |
| 242 | ret = wm8994_reg_read(wm8994, WM8958_MIC_DETECT_1); |
| 243 | if (ret < 0) { |
| 244 | dev_err(dev, "Failed to read power status: %d\n", ret); |
| 245 | } else if (ret & WM8958_MICD_ENA) { |
| 246 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); |
| 247 | return 0; |
| 248 | } |
| 249 | break; |
| 250 | default: |
| 251 | break; |
| 252 | } |
| 253 | |
Mark Brown | 881de67 | 2011-08-22 15:43:55 +0200 | [diff] [blame] | 254 | /* Disable LDO pulldowns while the device is suspended if we |
| 255 | * don't know that something will be driving them. */ |
| 256 | if (!wm8994->ldo_ena_always_driven) |
| 257 | wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, |
| 258 | WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, |
| 259 | WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD); |
| 260 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 261 | /* GPIO configuration state is saved here since we may be configuring |
| 262 | * the GPIO alternate functions even if we're not using the gpiolib |
| 263 | * driver for them. |
| 264 | */ |
| 265 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, |
| 266 | &wm8994->gpio_regs); |
| 267 | if (ret < 0) |
| 268 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); |
| 269 | |
| 270 | /* For similar reasons we also stash the regulator states */ |
| 271 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
| 272 | &wm8994->ldo_regs); |
| 273 | if (ret < 0) |
| 274 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); |
| 275 | |
Mark Brown | f40dff9 | 2011-02-21 18:30:31 +0000 | [diff] [blame] | 276 | /* Explicitly put the device into reset in case regulators |
| 277 | * don't get disabled in order to ensure consistent restart. |
| 278 | */ |
| 279 | wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994); |
| 280 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 281 | wm8994->suspended = true; |
| 282 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 283 | ret = regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 284 | wm8994->supplies); |
| 285 | if (ret != 0) { |
| 286 | dev_err(dev, "Failed to disable supplies: %d\n", ret); |
| 287 | return ret; |
| 288 | } |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 293 | static int wm8994_resume(struct device *dev) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 294 | { |
| 295 | struct wm8994 *wm8994 = dev_get_drvdata(dev); |
Mark Brown | 98ae1cc | 2011-06-07 11:49:42 +0100 | [diff] [blame] | 296 | int ret, i; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 297 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 298 | /* We may have lied to the PM core about suspending */ |
| 299 | if (!wm8994->suspended) |
| 300 | return 0; |
| 301 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 302 | ret = regulator_bulk_enable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 303 | wm8994->supplies); |
| 304 | if (ret != 0) { |
| 305 | dev_err(dev, "Failed to enable supplies: %d\n", ret); |
| 306 | return ret; |
| 307 | } |
| 308 | |
Mark Brown | 98ae1cc | 2011-06-07 11:49:42 +0100 | [diff] [blame] | 309 | /* Write register at a time as we use the cache on the CPU so store |
| 310 | * it in native endian. |
| 311 | */ |
| 312 | for (i = 0; i < ARRAY_SIZE(wm8994->irq_masks_cur); i++) { |
| 313 | ret = wm8994_reg_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK |
| 314 | + i, wm8994->irq_masks_cur[i]); |
| 315 | if (ret < 0) |
| 316 | dev_err(dev, "Failed to restore interrupt masks: %d\n", |
| 317 | ret); |
| 318 | } |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 319 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 320 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
| 321 | &wm8994->ldo_regs); |
| 322 | if (ret < 0) |
| 323 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); |
| 324 | |
| 325 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, |
| 326 | &wm8994->gpio_regs); |
| 327 | if (ret < 0) |
| 328 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); |
| 329 | |
Mark Brown | 881de67 | 2011-08-22 15:43:55 +0200 | [diff] [blame] | 330 | /* Disable LDO pulldowns while the device is active */ |
| 331 | wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, |
| 332 | WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD, |
| 333 | 0); |
| 334 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 335 | wm8994->suspended = false; |
| 336 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 337 | return 0; |
| 338 | } |
| 339 | #endif |
| 340 | |
| 341 | #ifdef CONFIG_REGULATOR |
| 342 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) |
| 343 | { |
| 344 | struct wm8994_ldo_pdata *ldo_pdata; |
| 345 | |
| 346 | if (!pdata) |
| 347 | return 0; |
| 348 | |
| 349 | ldo_pdata = &pdata->ldo[ldo]; |
| 350 | |
| 351 | if (!ldo_pdata->init_data) |
| 352 | return 0; |
| 353 | |
| 354 | return ldo_pdata->init_data->num_consumer_supplies != 0; |
| 355 | } |
| 356 | #else |
| 357 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) |
| 358 | { |
| 359 | return 0; |
| 360 | } |
| 361 | #endif |
| 362 | |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 363 | static struct regmap_config wm8994_regmap_config = { |
| 364 | .reg_bits = 16, |
| 365 | .val_bits = 16, |
| 366 | }; |
| 367 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 368 | /* |
| 369 | * Instantiate the generic non-control parts of the device. |
| 370 | */ |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 371 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 372 | { |
| 373 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 374 | const char *devname; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 375 | int ret, i; |
Mark Brown | 26c34c2 | 2011-11-03 13:20:38 +0000 | [diff] [blame^] | 376 | int pulls = 0; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 377 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 378 | dev_set_drvdata(wm8994->dev, wm8994); |
| 379 | |
| 380 | /* Add the on-chip regulators first for bootstrapping */ |
| 381 | ret = mfd_add_devices(wm8994->dev, -1, |
| 382 | wm8994_regulator_devs, |
| 383 | ARRAY_SIZE(wm8994_regulator_devs), |
| 384 | NULL, 0); |
| 385 | if (ret != 0) { |
| 386 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 387 | goto err_regmap; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 388 | } |
| 389 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 390 | switch (wm8994->type) { |
Mark Brown | b1f43bf | 2011-05-24 17:35:40 +0800 | [diff] [blame] | 391 | case WM1811: |
| 392 | wm8994->num_supplies = ARRAY_SIZE(wm1811_main_supplies); |
| 393 | break; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 394 | case WM8994: |
| 395 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); |
| 396 | break; |
| 397 | case WM8958: |
| 398 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); |
| 399 | break; |
| 400 | default: |
| 401 | BUG(); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 402 | goto err_regmap; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 403 | } |
| 404 | |
Mark Brown | 2fa3349 | 2011-10-25 13:45:40 +0200 | [diff] [blame] | 405 | wm8994->supplies = devm_kzalloc(wm8994->dev, |
| 406 | sizeof(struct regulator_bulk_data) * |
| 407 | wm8994->num_supplies, GFP_KERNEL); |
Axel Lin | fccbd21 | 2010-08-04 09:44:47 +0800 | [diff] [blame] | 408 | if (!wm8994->supplies) { |
| 409 | ret = -ENOMEM; |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 410 | goto err_regmap; |
Axel Lin | fccbd21 | 2010-08-04 09:44:47 +0800 | [diff] [blame] | 411 | } |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 412 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 413 | switch (wm8994->type) { |
Mark Brown | b1f43bf | 2011-05-24 17:35:40 +0800 | [diff] [blame] | 414 | case WM1811: |
| 415 | for (i = 0; i < ARRAY_SIZE(wm1811_main_supplies); i++) |
| 416 | wm8994->supplies[i].supply = wm1811_main_supplies[i]; |
| 417 | break; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 418 | case WM8994: |
| 419 | for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) |
| 420 | wm8994->supplies[i].supply = wm8994_main_supplies[i]; |
| 421 | break; |
| 422 | case WM8958: |
| 423 | for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) |
| 424 | wm8994->supplies[i].supply = wm8958_main_supplies[i]; |
| 425 | break; |
| 426 | default: |
| 427 | BUG(); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 428 | goto err_regmap; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 429 | } |
| 430 | |
| 431 | ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 432 | wm8994->supplies); |
| 433 | if (ret != 0) { |
| 434 | dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); |
Mark Brown | 2fa3349 | 2011-10-25 13:45:40 +0200 | [diff] [blame] | 435 | goto err_regmap; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 436 | } |
| 437 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 438 | ret = regulator_bulk_enable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 439 | wm8994->supplies); |
| 440 | if (ret != 0) { |
| 441 | dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); |
Joonyoung Shim | 7731074 | 2010-02-07 10:16:14 +0900 | [diff] [blame] | 442 | goto err_get; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); |
| 446 | if (ret < 0) { |
| 447 | dev_err(wm8994->dev, "Failed to read ID register\n"); |
| 448 | goto err_enable; |
| 449 | } |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 450 | switch (ret) { |
Mark Brown | b1f43bf | 2011-05-24 17:35:40 +0800 | [diff] [blame] | 451 | case 0x1811: |
| 452 | devname = "WM1811"; |
| 453 | if (wm8994->type != WM1811) |
| 454 | dev_warn(wm8994->dev, "Device registered as type %d\n", |
| 455 | wm8994->type); |
| 456 | wm8994->type = WM1811; |
| 457 | break; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 458 | case 0x8994: |
| 459 | devname = "WM8994"; |
| 460 | if (wm8994->type != WM8994) |
| 461 | dev_warn(wm8994->dev, "Device registered as type %d\n", |
| 462 | wm8994->type); |
| 463 | wm8994->type = WM8994; |
| 464 | break; |
| 465 | case 0x8958: |
| 466 | devname = "WM8958"; |
| 467 | if (wm8994->type != WM8958) |
| 468 | dev_warn(wm8994->dev, "Device registered as type %d\n", |
| 469 | wm8994->type); |
| 470 | wm8994->type = WM8958; |
| 471 | break; |
| 472 | default: |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 473 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
| 474 | ret); |
| 475 | ret = -EINVAL; |
| 476 | goto err_enable; |
| 477 | } |
| 478 | |
| 479 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); |
| 480 | if (ret < 0) { |
| 481 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", |
| 482 | ret); |
| 483 | goto err_enable; |
| 484 | } |
| 485 | |
Mark Brown | a2495bc | 2011-06-02 19:18:55 +0100 | [diff] [blame] | 486 | switch (wm8994->type) { |
| 487 | case WM8994: |
| 488 | switch (ret) { |
| 489 | case 0: |
| 490 | case 1: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 491 | dev_warn(wm8994->dev, |
| 492 | "revision %c not fully supported\n", |
| 493 | 'A' + ret); |
Mark Brown | a2495bc | 2011-06-02 19:18:55 +0100 | [diff] [blame] | 494 | break; |
| 495 | default: |
| 496 | break; |
| 497 | } |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 498 | break; |
| 499 | default: |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 500 | break; |
| 501 | } |
| 502 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 503 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 504 | |
| 505 | if (pdata) { |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 506 | wm8994->irq_base = pdata->irq_base; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 507 | wm8994->gpio_base = pdata->gpio_base; |
| 508 | |
| 509 | /* GPIO configuration is only applied if it's non-zero */ |
| 510 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { |
| 511 | if (pdata->gpio_defaults[i]) { |
| 512 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, |
| 513 | 0xffff, |
| 514 | pdata->gpio_defaults[i]); |
| 515 | } |
| 516 | } |
Mark Brown | 881de67 | 2011-08-22 15:43:55 +0200 | [diff] [blame] | 517 | |
| 518 | wm8994->ldo_ena_always_driven = pdata->ldo_ena_always_driven; |
Mark Brown | 26c34c2 | 2011-11-03 13:20:38 +0000 | [diff] [blame^] | 519 | |
| 520 | if (pdata->spkmode_pu) |
| 521 | pulls |= WM8994_SPKMODE_PU; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 522 | } |
| 523 | |
Mark Brown | 26c34c2 | 2011-11-03 13:20:38 +0000 | [diff] [blame^] | 524 | /* Disable unneeded pulls */ |
Mark Brown | 881de67 | 2011-08-22 15:43:55 +0200 | [diff] [blame] | 525 | wm8994_set_bits(wm8994, WM8994_PULL_CONTROL_2, |
Mark Brown | 26c34c2 | 2011-11-03 13:20:38 +0000 | [diff] [blame^] | 526 | WM8994_LDO1ENA_PD | WM8994_LDO2ENA_PD | |
| 527 | WM8994_SPKMODE_PU | WM8994_CSNADDR_PD, |
| 528 | pulls); |
Mark Brown | 881de67 | 2011-08-22 15:43:55 +0200 | [diff] [blame] | 529 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 530 | /* In some system designs where the regulators are not in use, |
| 531 | * we can achieve a small reduction in leakage currents by |
| 532 | * floating LDO outputs. This bit makes no difference if the |
| 533 | * LDOs are enabled, it only affects cases where the LDOs were |
| 534 | * in operation and are then disabled. |
| 535 | */ |
| 536 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { |
| 537 | if (wm8994_ldo_in_use(pdata, i)) |
| 538 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, |
| 539 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); |
| 540 | else |
| 541 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, |
| 542 | WM8994_LDO1_DISCH, 0); |
| 543 | } |
| 544 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 545 | wm8994_irq_init(wm8994); |
| 546 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 547 | ret = mfd_add_devices(wm8994->dev, -1, |
| 548 | wm8994_devs, ARRAY_SIZE(wm8994_devs), |
| 549 | NULL, 0); |
| 550 | if (ret != 0) { |
| 551 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 552 | goto err_irq; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 553 | } |
| 554 | |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 555 | pm_runtime_enable(wm8994->dev); |
| 556 | pm_runtime_resume(wm8994->dev); |
| 557 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 558 | return 0; |
| 559 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 560 | err_irq: |
| 561 | wm8994_irq_exit(wm8994); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 562 | err_enable: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 563 | regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 564 | wm8994->supplies); |
| 565 | err_get: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 566 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 567 | err_regmap: |
| 568 | regmap_exit(wm8994->regmap); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 569 | mfd_remove_devices(wm8994->dev); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 570 | return ret; |
| 571 | } |
| 572 | |
| 573 | static void wm8994_device_exit(struct wm8994 *wm8994) |
| 574 | { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 575 | pm_runtime_disable(wm8994->dev); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 576 | mfd_remove_devices(wm8994->dev); |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 577 | wm8994_irq_exit(wm8994); |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 578 | regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 579 | wm8994->supplies); |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 580 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 581 | regmap_exit(wm8994->regmap); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 582 | } |
| 583 | |
Mark Brown | cf763c2 | 2011-11-22 18:22:29 +0000 | [diff] [blame] | 584 | static const struct of_device_id wm8994_of_match[] = { |
| 585 | { .compatible = "wlf,wm1811", }, |
| 586 | { .compatible = "wlf,wm8994", }, |
| 587 | { .compatible = "wlf,wm8958", }, |
| 588 | { } |
| 589 | }; |
| 590 | MODULE_DEVICE_TABLE(of, wm8994_of_match); |
| 591 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 592 | static int wm8994_i2c_probe(struct i2c_client *i2c, |
| 593 | const struct i2c_device_id *id) |
| 594 | { |
| 595 | struct wm8994 *wm8994; |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 596 | int ret; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 597 | |
Mark Brown | 2fa3349 | 2011-10-25 13:45:40 +0200 | [diff] [blame] | 598 | wm8994 = devm_kzalloc(&i2c->dev, sizeof(struct wm8994), GFP_KERNEL); |
Axel Lin | d0a1169 | 2010-08-09 14:52:16 +0800 | [diff] [blame] | 599 | if (wm8994 == NULL) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 600 | return -ENOMEM; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 601 | |
| 602 | i2c_set_clientdata(i2c, wm8994); |
| 603 | wm8994->dev = &i2c->dev; |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 604 | wm8994->irq = i2c->irq; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 605 | wm8994->type = id->driver_data; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 606 | |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 607 | wm8994->regmap = regmap_init_i2c(i2c, &wm8994_regmap_config); |
| 608 | if (IS_ERR(wm8994->regmap)) { |
| 609 | ret = PTR_ERR(wm8994->regmap); |
| 610 | dev_err(wm8994->dev, "Failed to allocate register map: %d\n", |
| 611 | ret); |
Mark Brown | d6c645fc | 2011-06-17 13:02:27 +0100 | [diff] [blame] | 612 | return ret; |
| 613 | } |
| 614 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 615 | return wm8994_device_init(wm8994, i2c->irq); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | static int wm8994_i2c_remove(struct i2c_client *i2c) |
| 619 | { |
| 620 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); |
| 621 | |
| 622 | wm8994_device_exit(wm8994); |
| 623 | |
| 624 | return 0; |
| 625 | } |
| 626 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 627 | static const struct i2c_device_id wm8994_i2c_id[] = { |
Mark Brown | b1f43bf | 2011-05-24 17:35:40 +0800 | [diff] [blame] | 628 | { "wm1811", WM1811 }, |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 629 | { "wm8994", WM8994 }, |
| 630 | { "wm8958", WM8958 }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 631 | { } |
| 632 | }; |
| 633 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); |
| 634 | |
Mark Brown | aad3431 | 2011-03-17 16:33:49 +0000 | [diff] [blame] | 635 | static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, |
| 636 | NULL); |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 637 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 638 | static struct i2c_driver wm8994_i2c_driver = { |
| 639 | .driver = { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 640 | .name = "wm8994", |
| 641 | .owner = THIS_MODULE, |
| 642 | .pm = &wm8994_pm_ops, |
Mark Brown | cf763c2 | 2011-11-22 18:22:29 +0000 | [diff] [blame] | 643 | .of_match_table = wm8994_of_match, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 644 | }, |
| 645 | .probe = wm8994_i2c_probe, |
| 646 | .remove = wm8994_i2c_remove, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 647 | .id_table = wm8994_i2c_id, |
| 648 | }; |
| 649 | |
| 650 | static int __init wm8994_i2c_init(void) |
| 651 | { |
| 652 | int ret; |
| 653 | |
| 654 | ret = i2c_add_driver(&wm8994_i2c_driver); |
| 655 | if (ret != 0) |
| 656 | pr_err("Failed to register wm8994 I2C driver: %d\n", ret); |
| 657 | |
| 658 | return ret; |
| 659 | } |
| 660 | module_init(wm8994_i2c_init); |
| 661 | |
| 662 | static void __exit wm8994_i2c_exit(void) |
| 663 | { |
| 664 | i2c_del_driver(&wm8994_i2c_driver); |
| 665 | } |
| 666 | module_exit(wm8994_i2c_exit); |
| 667 | |
| 668 | MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); |
| 669 | MODULE_LICENSE("GPL"); |
| 670 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |