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> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/mfd/core.h> |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 21 | #include <linux/pm_runtime.h> |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 22 | #include <linux/regulator/consumer.h> |
| 23 | #include <linux/regulator/machine.h> |
| 24 | |
| 25 | #include <linux/mfd/wm8994/core.h> |
| 26 | #include <linux/mfd/wm8994/pdata.h> |
| 27 | #include <linux/mfd/wm8994/registers.h> |
| 28 | |
| 29 | static int wm8994_read(struct wm8994 *wm8994, unsigned short reg, |
| 30 | int bytes, void *dest) |
| 31 | { |
| 32 | int ret, i; |
| 33 | u16 *buf = dest; |
| 34 | |
| 35 | BUG_ON(bytes % 2); |
| 36 | BUG_ON(bytes <= 0); |
| 37 | |
| 38 | ret = wm8994->read_dev(wm8994, reg, bytes, dest); |
| 39 | if (ret < 0) |
| 40 | return ret; |
| 41 | |
| 42 | for (i = 0; i < bytes / 2; i++) { |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 43 | dev_vdbg(wm8994->dev, "Read %04x from R%d(0x%x)\n", |
Mark Brown | 316b6cc | 2011-03-18 12:50:10 +0000 | [diff] [blame^] | 44 | be16_to_cpu(buf[i]), reg + i, reg + i); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 45 | } |
| 46 | |
| 47 | return 0; |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * wm8994_reg_read: Read a single WM8994 register. |
| 52 | * |
| 53 | * @wm8994: Device to read from. |
| 54 | * @reg: Register to read. |
| 55 | */ |
| 56 | int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) |
| 57 | { |
| 58 | unsigned short val; |
| 59 | int ret; |
| 60 | |
| 61 | mutex_lock(&wm8994->io_lock); |
| 62 | |
| 63 | ret = wm8994_read(wm8994, reg, 2, &val); |
| 64 | |
| 65 | mutex_unlock(&wm8994->io_lock); |
| 66 | |
| 67 | if (ret < 0) |
| 68 | return ret; |
| 69 | else |
Mark Brown | 316b6cc | 2011-03-18 12:50:10 +0000 | [diff] [blame^] | 70 | return be16_to_cpu(val); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 71 | } |
| 72 | EXPORT_SYMBOL_GPL(wm8994_reg_read); |
| 73 | |
| 74 | /** |
| 75 | * wm8994_bulk_read: Read multiple WM8994 registers |
| 76 | * |
| 77 | * @wm8994: Device to read from |
| 78 | * @reg: First register |
| 79 | * @count: Number of registers |
Mark Brown | 316b6cc | 2011-03-18 12:50:10 +0000 | [diff] [blame^] | 80 | * @buf: Buffer to fill. The data will be returned big endian. |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 81 | */ |
| 82 | int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, |
| 83 | int count, u16 *buf) |
| 84 | { |
| 85 | int ret; |
| 86 | |
| 87 | mutex_lock(&wm8994->io_lock); |
| 88 | |
| 89 | ret = wm8994_read(wm8994, reg, count * 2, buf); |
| 90 | |
| 91 | mutex_unlock(&wm8994->io_lock); |
| 92 | |
| 93 | return ret; |
| 94 | } |
| 95 | EXPORT_SYMBOL_GPL(wm8994_bulk_read); |
| 96 | |
| 97 | static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 98 | int bytes, const void *src) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 99 | { |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 100 | const u16 *buf = src; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 101 | int i; |
| 102 | |
| 103 | BUG_ON(bytes % 2); |
| 104 | BUG_ON(bytes <= 0); |
| 105 | |
| 106 | for (i = 0; i < bytes / 2; i++) { |
| 107 | dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n", |
Mark Brown | 4277163 | 2011-03-17 21:42:29 +0000 | [diff] [blame] | 108 | be16_to_cpu(buf[i]), reg + i, reg + i); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | return wm8994->write_dev(wm8994, reg, bytes, src); |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * wm8994_reg_write: Write a single WM8994 register. |
| 116 | * |
| 117 | * @wm8994: Device to write to. |
| 118 | * @reg: Register to write to. |
| 119 | * @val: Value to write. |
| 120 | */ |
| 121 | int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, |
| 122 | unsigned short val) |
| 123 | { |
| 124 | int ret; |
| 125 | |
Mark Brown | 4277163 | 2011-03-17 21:42:29 +0000 | [diff] [blame] | 126 | val = cpu_to_be16(val); |
| 127 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 128 | mutex_lock(&wm8994->io_lock); |
| 129 | |
| 130 | ret = wm8994_write(wm8994, reg, 2, &val); |
| 131 | |
| 132 | mutex_unlock(&wm8994->io_lock); |
| 133 | |
| 134 | return ret; |
| 135 | } |
| 136 | EXPORT_SYMBOL_GPL(wm8994_reg_write); |
| 137 | |
| 138 | /** |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 139 | * wm8994_bulk_write: Write multiple WM8994 registers |
| 140 | * |
| 141 | * @wm8994: Device to write to |
| 142 | * @reg: First register |
| 143 | * @count: Number of registers |
Mark Brown | 4277163 | 2011-03-17 21:42:29 +0000 | [diff] [blame] | 144 | * @buf: Buffer to write from. Data must be big-endian formatted. |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 145 | */ |
| 146 | int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 147 | int count, const u16 *buf) |
Mark Brown | e93c538 | 2011-03-10 13:54:07 +0000 | [diff] [blame] | 148 | { |
| 149 | int ret; |
| 150 | |
| 151 | mutex_lock(&wm8994->io_lock); |
| 152 | |
| 153 | ret = wm8994_write(wm8994, reg, count * 2, buf); |
| 154 | |
| 155 | mutex_unlock(&wm8994->io_lock); |
| 156 | |
| 157 | return ret; |
| 158 | } |
| 159 | EXPORT_SYMBOL_GPL(wm8994_bulk_write); |
| 160 | |
| 161 | /** |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 162 | * wm8994_set_bits: Set the value of a bitfield in a WM8994 register |
| 163 | * |
| 164 | * @wm8994: Device to write to. |
| 165 | * @reg: Register to write to. |
| 166 | * @mask: Mask of bits to set. |
| 167 | * @val: Value to set (unshifted) |
| 168 | */ |
| 169 | int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, |
| 170 | unsigned short mask, unsigned short val) |
| 171 | { |
| 172 | int ret; |
| 173 | u16 r; |
| 174 | |
| 175 | mutex_lock(&wm8994->io_lock); |
| 176 | |
| 177 | ret = wm8994_read(wm8994, reg, 2, &r); |
| 178 | if (ret < 0) |
| 179 | goto out; |
| 180 | |
Mark Brown | 316b6cc | 2011-03-18 12:50:10 +0000 | [diff] [blame^] | 181 | r = be16_to_cpu(r); |
| 182 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 183 | r &= ~mask; |
| 184 | r |= val; |
| 185 | |
Mark Brown | 4277163 | 2011-03-17 21:42:29 +0000 | [diff] [blame] | 186 | r = cpu_to_be16(r); |
| 187 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 188 | ret = wm8994_write(wm8994, reg, 2, &r); |
| 189 | |
| 190 | out: |
| 191 | mutex_unlock(&wm8994->io_lock); |
| 192 | |
| 193 | return ret; |
| 194 | } |
| 195 | EXPORT_SYMBOL_GPL(wm8994_set_bits); |
| 196 | |
| 197 | static struct mfd_cell wm8994_regulator_devs[] = { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 198 | { |
| 199 | .name = "wm8994-ldo", |
| 200 | .id = 1, |
| 201 | .pm_runtime_no_callbacks = true, |
| 202 | }, |
| 203 | { |
| 204 | .name = "wm8994-ldo", |
| 205 | .id = 2, |
| 206 | .pm_runtime_no_callbacks = true, |
| 207 | }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 208 | }; |
| 209 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 210 | static struct resource wm8994_codec_resources[] = { |
| 211 | { |
| 212 | .start = WM8994_IRQ_TEMP_SHUT, |
| 213 | .end = WM8994_IRQ_TEMP_WARN, |
| 214 | .flags = IORESOURCE_IRQ, |
| 215 | }, |
| 216 | }; |
| 217 | |
| 218 | static struct resource wm8994_gpio_resources[] = { |
| 219 | { |
| 220 | .start = WM8994_IRQ_GPIO(1), |
| 221 | .end = WM8994_IRQ_GPIO(11), |
| 222 | .flags = IORESOURCE_IRQ, |
| 223 | }, |
| 224 | }; |
| 225 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 226 | static struct mfd_cell wm8994_devs[] = { |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 227 | { |
| 228 | .name = "wm8994-codec", |
| 229 | .num_resources = ARRAY_SIZE(wm8994_codec_resources), |
| 230 | .resources = wm8994_codec_resources, |
| 231 | }, |
| 232 | |
| 233 | { |
| 234 | .name = "wm8994-gpio", |
| 235 | .num_resources = ARRAY_SIZE(wm8994_gpio_resources), |
| 236 | .resources = wm8994_gpio_resources, |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 237 | .pm_runtime_no_callbacks = true, |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 238 | }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 239 | }; |
| 240 | |
| 241 | /* |
| 242 | * Supplies for the main bulk of CODEC; the LDO supplies are ignored |
| 243 | * and should be handled via the standard regulator API supply |
| 244 | * management. |
| 245 | */ |
| 246 | static const char *wm8994_main_supplies[] = { |
| 247 | "DBVDD", |
| 248 | "DCVDD", |
| 249 | "AVDD1", |
| 250 | "AVDD2", |
| 251 | "CPVDD", |
| 252 | "SPKVDD1", |
| 253 | "SPKVDD2", |
| 254 | }; |
| 255 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 256 | static const char *wm8958_main_supplies[] = { |
| 257 | "DBVDD1", |
| 258 | "DBVDD2", |
| 259 | "DBVDD3", |
| 260 | "DCVDD", |
| 261 | "AVDD1", |
| 262 | "AVDD2", |
| 263 | "CPVDD", |
| 264 | "SPKVDD1", |
| 265 | "SPKVDD2", |
| 266 | }; |
| 267 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 268 | #ifdef CONFIG_PM |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 269 | static int wm8994_suspend(struct device *dev) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 270 | { |
| 271 | struct wm8994 *wm8994 = dev_get_drvdata(dev); |
| 272 | int ret; |
| 273 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 274 | /* Don't actually go through with the suspend if the CODEC is |
| 275 | * still active (eg, for audio passthrough from CP. */ |
| 276 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); |
| 277 | if (ret < 0) { |
| 278 | dev_err(dev, "Failed to read power status: %d\n", ret); |
| 279 | } else if (ret & WM8994_VMID_SEL_MASK) { |
| 280 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); |
| 281 | return 0; |
| 282 | } |
| 283 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 284 | /* GPIO configuration state is saved here since we may be configuring |
| 285 | * the GPIO alternate functions even if we're not using the gpiolib |
| 286 | * driver for them. |
| 287 | */ |
| 288 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, |
| 289 | &wm8994->gpio_regs); |
| 290 | if (ret < 0) |
| 291 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); |
| 292 | |
| 293 | /* For similar reasons we also stash the regulator states */ |
| 294 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
| 295 | &wm8994->ldo_regs); |
| 296 | if (ret < 0) |
| 297 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); |
| 298 | |
Mark Brown | f40dff9 | 2011-02-21 18:30:31 +0000 | [diff] [blame] | 299 | /* Explicitly put the device into reset in case regulators |
| 300 | * don't get disabled in order to ensure consistent restart. |
| 301 | */ |
| 302 | wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994); |
| 303 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 304 | wm8994->suspended = true; |
| 305 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 306 | ret = regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 307 | wm8994->supplies); |
| 308 | if (ret != 0) { |
| 309 | dev_err(dev, "Failed to disable supplies: %d\n", ret); |
| 310 | return ret; |
| 311 | } |
| 312 | |
| 313 | return 0; |
| 314 | } |
| 315 | |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 316 | static int wm8994_resume(struct device *dev) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 317 | { |
| 318 | struct wm8994 *wm8994 = dev_get_drvdata(dev); |
| 319 | int ret; |
| 320 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 321 | /* We may have lied to the PM core about suspending */ |
| 322 | if (!wm8994->suspended) |
| 323 | return 0; |
| 324 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 325 | ret = regulator_bulk_enable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 326 | wm8994->supplies); |
| 327 | if (ret != 0) { |
| 328 | dev_err(dev, "Failed to enable supplies: %d\n", ret); |
| 329 | return ret; |
| 330 | } |
| 331 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 332 | ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK, |
| 333 | WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur); |
| 334 | if (ret < 0) |
| 335 | dev_err(dev, "Failed to restore interrupt masks: %d\n", ret); |
| 336 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 337 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
| 338 | &wm8994->ldo_regs); |
| 339 | if (ret < 0) |
| 340 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); |
| 341 | |
| 342 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, |
| 343 | &wm8994->gpio_regs); |
| 344 | if (ret < 0) |
| 345 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); |
| 346 | |
Mark Brown | 77bd70e | 2011-02-04 14:57:43 +0000 | [diff] [blame] | 347 | wm8994->suspended = false; |
| 348 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 349 | return 0; |
| 350 | } |
| 351 | #endif |
| 352 | |
| 353 | #ifdef CONFIG_REGULATOR |
| 354 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) |
| 355 | { |
| 356 | struct wm8994_ldo_pdata *ldo_pdata; |
| 357 | |
| 358 | if (!pdata) |
| 359 | return 0; |
| 360 | |
| 361 | ldo_pdata = &pdata->ldo[ldo]; |
| 362 | |
| 363 | if (!ldo_pdata->init_data) |
| 364 | return 0; |
| 365 | |
| 366 | return ldo_pdata->init_data->num_consumer_supplies != 0; |
| 367 | } |
| 368 | #else |
| 369 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) |
| 370 | { |
| 371 | return 0; |
| 372 | } |
| 373 | #endif |
| 374 | |
| 375 | /* |
| 376 | * Instantiate the generic non-control parts of the device. |
| 377 | */ |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 378 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 379 | { |
| 380 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 381 | const char *devname; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 382 | int ret, i; |
| 383 | |
| 384 | mutex_init(&wm8994->io_lock); |
| 385 | dev_set_drvdata(wm8994->dev, wm8994); |
| 386 | |
| 387 | /* Add the on-chip regulators first for bootstrapping */ |
| 388 | ret = mfd_add_devices(wm8994->dev, -1, |
| 389 | wm8994_regulator_devs, |
| 390 | ARRAY_SIZE(wm8994_regulator_devs), |
| 391 | NULL, 0); |
| 392 | if (ret != 0) { |
| 393 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); |
| 394 | goto err; |
| 395 | } |
| 396 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 397 | switch (wm8994->type) { |
| 398 | case WM8994: |
| 399 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); |
| 400 | break; |
| 401 | case WM8958: |
| 402 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); |
| 403 | break; |
| 404 | default: |
| 405 | BUG(); |
| 406 | return -EINVAL; |
| 407 | } |
| 408 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 409 | wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) * |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 410 | wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 411 | GFP_KERNEL); |
Axel Lin | fccbd21 | 2010-08-04 09:44:47 +0800 | [diff] [blame] | 412 | if (!wm8994->supplies) { |
| 413 | ret = -ENOMEM; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 414 | goto err; |
Axel Lin | fccbd21 | 2010-08-04 09:44:47 +0800 | [diff] [blame] | 415 | } |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 416 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 417 | switch (wm8994->type) { |
| 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(); |
| 428 | return -EINVAL; |
| 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); |
Joonyoung Shim | 7731074 | 2010-02-07 10:16:14 +0900 | [diff] [blame] | 435 | goto err_supplies; |
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) { |
| 451 | case 0x8994: |
| 452 | devname = "WM8994"; |
| 453 | if (wm8994->type != WM8994) |
| 454 | dev_warn(wm8994->dev, "Device registered as type %d\n", |
| 455 | wm8994->type); |
| 456 | wm8994->type = WM8994; |
| 457 | break; |
| 458 | case 0x8958: |
| 459 | devname = "WM8958"; |
| 460 | if (wm8994->type != WM8958) |
| 461 | dev_warn(wm8994->dev, "Device registered as type %d\n", |
| 462 | wm8994->type); |
| 463 | wm8994->type = WM8958; |
| 464 | break; |
| 465 | default: |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 466 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
| 467 | ret); |
| 468 | ret = -EINVAL; |
| 469 | goto err_enable; |
| 470 | } |
| 471 | |
| 472 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); |
| 473 | if (ret < 0) { |
| 474 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", |
| 475 | ret); |
| 476 | goto err_enable; |
| 477 | } |
| 478 | |
| 479 | switch (ret) { |
| 480 | case 0: |
| 481 | case 1: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 482 | if (wm8994->type == WM8994) |
| 483 | dev_warn(wm8994->dev, |
| 484 | "revision %c not fully supported\n", |
| 485 | 'A' + ret); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 486 | break; |
| 487 | default: |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 488 | break; |
| 489 | } |
| 490 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 491 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 492 | |
| 493 | if (pdata) { |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 494 | wm8994->irq_base = pdata->irq_base; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 495 | wm8994->gpio_base = pdata->gpio_base; |
| 496 | |
| 497 | /* GPIO configuration is only applied if it's non-zero */ |
| 498 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { |
| 499 | if (pdata->gpio_defaults[i]) { |
| 500 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, |
| 501 | 0xffff, |
| 502 | pdata->gpio_defaults[i]); |
| 503 | } |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* In some system designs where the regulators are not in use, |
| 508 | * we can achieve a small reduction in leakage currents by |
| 509 | * floating LDO outputs. This bit makes no difference if the |
| 510 | * LDOs are enabled, it only affects cases where the LDOs were |
| 511 | * in operation and are then disabled. |
| 512 | */ |
| 513 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { |
| 514 | if (wm8994_ldo_in_use(pdata, i)) |
| 515 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, |
| 516 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); |
| 517 | else |
| 518 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, |
| 519 | WM8994_LDO1_DISCH, 0); |
| 520 | } |
| 521 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 522 | wm8994_irq_init(wm8994); |
| 523 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 524 | ret = mfd_add_devices(wm8994->dev, -1, |
| 525 | wm8994_devs, ARRAY_SIZE(wm8994_devs), |
| 526 | NULL, 0); |
| 527 | if (ret != 0) { |
| 528 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 529 | goto err_irq; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 530 | } |
| 531 | |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 532 | pm_runtime_enable(wm8994->dev); |
| 533 | pm_runtime_resume(wm8994->dev); |
| 534 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 535 | return 0; |
| 536 | |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 537 | err_irq: |
| 538 | wm8994_irq_exit(wm8994); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 539 | err_enable: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 540 | regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 541 | wm8994->supplies); |
| 542 | err_get: |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 543 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 544 | err_supplies: |
| 545 | kfree(wm8994->supplies); |
| 546 | err: |
| 547 | mfd_remove_devices(wm8994->dev); |
| 548 | kfree(wm8994); |
| 549 | return ret; |
| 550 | } |
| 551 | |
| 552 | static void wm8994_device_exit(struct wm8994 *wm8994) |
| 553 | { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 554 | pm_runtime_disable(wm8994->dev); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 555 | mfd_remove_devices(wm8994->dev); |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 556 | wm8994_irq_exit(wm8994); |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 557 | regulator_bulk_disable(wm8994->num_supplies, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 558 | wm8994->supplies); |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 559 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 560 | kfree(wm8994->supplies); |
| 561 | kfree(wm8994); |
| 562 | } |
| 563 | |
| 564 | static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg, |
| 565 | int bytes, void *dest) |
| 566 | { |
| 567 | struct i2c_client *i2c = wm8994->control_data; |
| 568 | int ret; |
| 569 | u16 r = cpu_to_be16(reg); |
| 570 | |
| 571 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); |
| 572 | if (ret < 0) |
| 573 | return ret; |
| 574 | if (ret != 2) |
| 575 | return -EIO; |
| 576 | |
| 577 | ret = i2c_master_recv(i2c, dest, bytes); |
| 578 | if (ret < 0) |
| 579 | return ret; |
| 580 | if (ret != bytes) |
| 581 | return -EIO; |
| 582 | return 0; |
| 583 | } |
| 584 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 585 | static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg, |
Mark Brown | 07e73fb | 2011-03-17 21:42:30 +0000 | [diff] [blame] | 586 | int bytes, const void *src) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 587 | { |
| 588 | struct i2c_client *i2c = wm8994->control_data; |
Mark Brown | 334e9ab | 2011-03-17 21:42:28 +0000 | [diff] [blame] | 589 | struct i2c_msg xfer[2]; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 590 | int ret; |
| 591 | |
| 592 | reg = cpu_to_be16(reg); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 593 | |
Mark Brown | 334e9ab | 2011-03-17 21:42:28 +0000 | [diff] [blame] | 594 | xfer[0].addr = i2c->addr; |
| 595 | xfer[0].flags = 0; |
| 596 | xfer[0].len = 2; |
| 597 | xfer[0].buf = (char *)® |
| 598 | |
| 599 | xfer[1].addr = i2c->addr; |
| 600 | xfer[1].flags = I2C_M_NOSTART; |
| 601 | xfer[1].len = bytes; |
| 602 | xfer[1].buf = (char *)src; |
| 603 | |
| 604 | ret = i2c_transfer(i2c->adapter, xfer, 2); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 605 | if (ret < 0) |
| 606 | return ret; |
Mark Brown | 334e9ab | 2011-03-17 21:42:28 +0000 | [diff] [blame] | 607 | if (ret != 2) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 608 | return -EIO; |
| 609 | |
| 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | static int wm8994_i2c_probe(struct i2c_client *i2c, |
| 614 | const struct i2c_device_id *id) |
| 615 | { |
| 616 | struct wm8994 *wm8994; |
| 617 | |
| 618 | wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL); |
Axel Lin | d0a1169 | 2010-08-09 14:52:16 +0800 | [diff] [blame] | 619 | if (wm8994 == NULL) |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 620 | return -ENOMEM; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 621 | |
| 622 | i2c_set_clientdata(i2c, wm8994); |
| 623 | wm8994->dev = &i2c->dev; |
| 624 | wm8994->control_data = i2c; |
| 625 | wm8994->read_dev = wm8994_i2c_read_device; |
| 626 | wm8994->write_dev = wm8994_i2c_write_device; |
Mark Brown | c9fbf7e | 2010-03-26 16:49:15 +0000 | [diff] [blame] | 627 | wm8994->irq = i2c->irq; |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 628 | wm8994->type = id->driver_data; |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 629 | |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 630 | return wm8994_device_init(wm8994, i2c->irq); |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 631 | } |
| 632 | |
| 633 | static int wm8994_i2c_remove(struct i2c_client *i2c) |
| 634 | { |
| 635 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); |
| 636 | |
| 637 | wm8994_device_exit(wm8994); |
| 638 | |
| 639 | return 0; |
| 640 | } |
| 641 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 642 | static const struct i2c_device_id wm8994_i2c_id[] = { |
Mark Brown | 559e0df | 2010-08-31 19:25:12 +0100 | [diff] [blame] | 643 | { "wm8994", WM8994 }, |
| 644 | { "wm8958", WM8958 }, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 645 | { } |
| 646 | }; |
| 647 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); |
| 648 | |
Mark Brown | aad3431 | 2011-03-17 16:33:49 +0000 | [diff] [blame] | 649 | static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, |
| 650 | NULL); |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 651 | |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 652 | static struct i2c_driver wm8994_i2c_driver = { |
| 653 | .driver = { |
Mark Brown | d450f19 | 2010-11-26 17:19:35 +0000 | [diff] [blame] | 654 | .name = "wm8994", |
| 655 | .owner = THIS_MODULE, |
| 656 | .pm = &wm8994_pm_ops, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 657 | }, |
| 658 | .probe = wm8994_i2c_probe, |
| 659 | .remove = wm8994_i2c_remove, |
Mark Brown | 9e50108 | 2010-01-29 18:20:29 +0000 | [diff] [blame] | 660 | .id_table = wm8994_i2c_id, |
| 661 | }; |
| 662 | |
| 663 | static int __init wm8994_i2c_init(void) |
| 664 | { |
| 665 | int ret; |
| 666 | |
| 667 | ret = i2c_add_driver(&wm8994_i2c_driver); |
| 668 | if (ret != 0) |
| 669 | pr_err("Failed to register wm8994 I2C driver: %d\n", ret); |
| 670 | |
| 671 | return ret; |
| 672 | } |
| 673 | module_init(wm8994_i2c_init); |
| 674 | |
| 675 | static void __exit wm8994_i2c_exit(void) |
| 676 | { |
| 677 | i2c_del_driver(&wm8994_i2c_driver); |
| 678 | } |
| 679 | module_exit(wm8994_i2c_exit); |
| 680 | |
| 681 | MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); |
| 682 | MODULE_LICENSE("GPL"); |
| 683 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |