Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Kontron PLD MFD core driver |
| 3 | * |
| 4 | * Copyright (c) 2010-2013 Kontron Europe GmbH |
| 5 | * Author: Michael Brunner <michael.brunner@kontron.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License 2 as published |
| 9 | * by the Free Software Foundation. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | */ |
| 16 | |
| 17 | #include <linux/platform_device.h> |
| 18 | #include <linux/mfd/core.h> |
| 19 | #include <linux/mfd/kempld.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/dmi.h> |
| 22 | #include <linux/io.h> |
| 23 | #include <linux/delay.h> |
| 24 | |
| 25 | #define MAX_ID_LEN 4 |
| 26 | static char force_device_id[MAX_ID_LEN + 1] = ""; |
Lee Jones | 9ef4e93 | 2014-07-21 16:47:51 +0100 | [diff] [blame] | 27 | module_param_string(force_device_id, force_device_id, |
| 28 | sizeof(force_device_id), 0); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 29 | MODULE_PARM_DESC(force_device_id, "Override detected product"); |
| 30 | |
| 31 | /* |
| 32 | * Get hardware mutex to block firmware from accessing the pld. |
| 33 | * It is possible for the firmware may hold the mutex for an extended length of |
| 34 | * time. This function will block until access has been granted. |
| 35 | */ |
| 36 | static void kempld_get_hardware_mutex(struct kempld_device_data *pld) |
| 37 | { |
| 38 | /* The mutex bit will read 1 until access has been granted */ |
| 39 | while (ioread8(pld->io_index) & KEMPLD_MUTEX_KEY) |
Lee Jones | 9ef4e93 | 2014-07-21 16:47:51 +0100 | [diff] [blame] | 40 | usleep_range(1000, 3000); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 41 | } |
| 42 | |
| 43 | static void kempld_release_hardware_mutex(struct kempld_device_data *pld) |
| 44 | { |
| 45 | /* The harware mutex is released when 1 is written to the mutex bit. */ |
| 46 | iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); |
| 47 | } |
| 48 | |
| 49 | static int kempld_get_info_generic(struct kempld_device_data *pld) |
| 50 | { |
| 51 | u16 version; |
| 52 | u8 spec; |
| 53 | |
| 54 | kempld_get_mutex(pld); |
| 55 | |
| 56 | version = kempld_read16(pld, KEMPLD_VERSION); |
| 57 | spec = kempld_read8(pld, KEMPLD_SPEC); |
| 58 | pld->info.buildnr = kempld_read16(pld, KEMPLD_BUILDNR); |
| 59 | |
| 60 | pld->info.minor = KEMPLD_VERSION_GET_MINOR(version); |
| 61 | pld->info.major = KEMPLD_VERSION_GET_MAJOR(version); |
| 62 | pld->info.number = KEMPLD_VERSION_GET_NUMBER(version); |
| 63 | pld->info.type = KEMPLD_VERSION_GET_TYPE(version); |
| 64 | |
| 65 | if (spec == 0xff) { |
| 66 | pld->info.spec_minor = 0; |
| 67 | pld->info.spec_major = 1; |
| 68 | } else { |
| 69 | pld->info.spec_minor = KEMPLD_SPEC_GET_MINOR(spec); |
| 70 | pld->info.spec_major = KEMPLD_SPEC_GET_MAJOR(spec); |
| 71 | } |
| 72 | |
| 73 | if (pld->info.spec_major > 0) |
| 74 | pld->feature_mask = kempld_read16(pld, KEMPLD_FEATURE); |
| 75 | else |
| 76 | pld->feature_mask = 0; |
| 77 | |
| 78 | kempld_release_mutex(pld); |
| 79 | |
| 80 | return 0; |
| 81 | } |
| 82 | |
| 83 | enum kempld_cells { |
| 84 | KEMPLD_I2C = 0, |
| 85 | KEMPLD_WDT, |
| 86 | KEMPLD_GPIO, |
| 87 | KEMPLD_UART, |
| 88 | }; |
| 89 | |
Krzysztof Kozlowski | bd6d35a6 | 2014-05-13 12:58:42 +0200 | [diff] [blame] | 90 | static const struct mfd_cell kempld_devs[] = { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 91 | [KEMPLD_I2C] = { |
| 92 | .name = "kempld-i2c", |
| 93 | }, |
| 94 | [KEMPLD_WDT] = { |
| 95 | .name = "kempld-wdt", |
| 96 | }, |
| 97 | [KEMPLD_GPIO] = { |
| 98 | .name = "kempld-gpio", |
| 99 | }, |
| 100 | [KEMPLD_UART] = { |
| 101 | .name = "kempld-uart", |
| 102 | }, |
| 103 | }; |
| 104 | |
| 105 | #define KEMPLD_MAX_DEVS ARRAY_SIZE(kempld_devs) |
| 106 | |
| 107 | static int kempld_register_cells_generic(struct kempld_device_data *pld) |
| 108 | { |
| 109 | struct mfd_cell devs[KEMPLD_MAX_DEVS]; |
| 110 | int i = 0; |
| 111 | |
| 112 | if (pld->feature_mask & KEMPLD_FEATURE_BIT_I2C) |
| 113 | devs[i++] = kempld_devs[KEMPLD_I2C]; |
| 114 | |
| 115 | if (pld->feature_mask & KEMPLD_FEATURE_BIT_WATCHDOG) |
| 116 | devs[i++] = kempld_devs[KEMPLD_WDT]; |
| 117 | |
| 118 | if (pld->feature_mask & KEMPLD_FEATURE_BIT_GPIO) |
| 119 | devs[i++] = kempld_devs[KEMPLD_GPIO]; |
| 120 | |
| 121 | if (pld->feature_mask & KEMPLD_FEATURE_MASK_UART) |
| 122 | devs[i++] = kempld_devs[KEMPLD_UART]; |
| 123 | |
| 124 | return mfd_add_devices(pld->dev, -1, devs, i, NULL, 0, NULL); |
| 125 | } |
| 126 | |
| 127 | static struct resource kempld_ioresource = { |
| 128 | .start = KEMPLD_IOINDEX, |
| 129 | .end = KEMPLD_IODATA, |
| 130 | .flags = IORESOURCE_IO, |
| 131 | }; |
| 132 | |
| 133 | static const struct kempld_platform_data kempld_platform_data_generic = { |
| 134 | .pld_clock = KEMPLD_CLK, |
| 135 | .ioresource = &kempld_ioresource, |
| 136 | .get_hardware_mutex = kempld_get_hardware_mutex, |
| 137 | .release_hardware_mutex = kempld_release_hardware_mutex, |
| 138 | .get_info = kempld_get_info_generic, |
| 139 | .register_cells = kempld_register_cells_generic, |
| 140 | }; |
| 141 | |
| 142 | static struct platform_device *kempld_pdev; |
| 143 | |
| 144 | static int kempld_create_platform_device(const struct dmi_system_id *id) |
| 145 | { |
| 146 | struct kempld_platform_data *pdata = id->driver_data; |
| 147 | int ret; |
| 148 | |
| 149 | kempld_pdev = platform_device_alloc("kempld", -1); |
| 150 | if (!kempld_pdev) |
| 151 | return -ENOMEM; |
| 152 | |
| 153 | ret = platform_device_add_data(kempld_pdev, pdata, sizeof(*pdata)); |
| 154 | if (ret) |
| 155 | goto err; |
| 156 | |
| 157 | ret = platform_device_add_resources(kempld_pdev, pdata->ioresource, 1); |
| 158 | if (ret) |
| 159 | goto err; |
| 160 | |
| 161 | ret = platform_device_add(kempld_pdev); |
| 162 | if (ret) |
| 163 | goto err; |
| 164 | |
| 165 | return 0; |
| 166 | err: |
| 167 | platform_device_put(kempld_pdev); |
| 168 | return ret; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * kempld_read8 - read 8 bit register |
| 173 | * @pld: kempld_device_data structure describing the PLD |
| 174 | * @index: register index on the chip |
| 175 | * |
| 176 | * kempld_get_mutex must be called prior to calling this function. |
| 177 | */ |
| 178 | u8 kempld_read8(struct kempld_device_data *pld, u8 index) |
| 179 | { |
| 180 | iowrite8(index, pld->io_index); |
| 181 | return ioread8(pld->io_data); |
| 182 | } |
| 183 | EXPORT_SYMBOL_GPL(kempld_read8); |
| 184 | |
| 185 | /** |
| 186 | * kempld_write8 - write 8 bit register |
| 187 | * @pld: kempld_device_data structure describing the PLD |
| 188 | * @index: register index on the chip |
| 189 | * @data: new register value |
| 190 | * |
| 191 | * kempld_get_mutex must be called prior to calling this function. |
| 192 | */ |
| 193 | void kempld_write8(struct kempld_device_data *pld, u8 index, u8 data) |
| 194 | { |
| 195 | iowrite8(index, pld->io_index); |
| 196 | iowrite8(data, pld->io_data); |
| 197 | } |
| 198 | EXPORT_SYMBOL_GPL(kempld_write8); |
| 199 | |
| 200 | /** |
| 201 | * kempld_read16 - read 16 bit register |
| 202 | * @pld: kempld_device_data structure describing the PLD |
| 203 | * @index: register index on the chip |
| 204 | * |
| 205 | * kempld_get_mutex must be called prior to calling this function. |
| 206 | */ |
| 207 | u16 kempld_read16(struct kempld_device_data *pld, u8 index) |
| 208 | { |
| 209 | return kempld_read8(pld, index) | kempld_read8(pld, index + 1) << 8; |
| 210 | } |
| 211 | EXPORT_SYMBOL_GPL(kempld_read16); |
| 212 | |
| 213 | /** |
| 214 | * kempld_write16 - write 16 bit register |
| 215 | * @pld: kempld_device_data structure describing the PLD |
| 216 | * @index: register index on the chip |
| 217 | * @data: new register value |
| 218 | * |
| 219 | * kempld_get_mutex must be called prior to calling this function. |
| 220 | */ |
| 221 | void kempld_write16(struct kempld_device_data *pld, u8 index, u16 data) |
| 222 | { |
| 223 | kempld_write8(pld, index, (u8)data); |
| 224 | kempld_write8(pld, index + 1, (u8)(data >> 8)); |
| 225 | } |
| 226 | EXPORT_SYMBOL_GPL(kempld_write16); |
| 227 | |
| 228 | /** |
| 229 | * kempld_read32 - read 32 bit register |
| 230 | * @pld: kempld_device_data structure describing the PLD |
| 231 | * @index: register index on the chip |
| 232 | * |
| 233 | * kempld_get_mutex must be called prior to calling this function. |
| 234 | */ |
| 235 | u32 kempld_read32(struct kempld_device_data *pld, u8 index) |
| 236 | { |
| 237 | return kempld_read16(pld, index) | kempld_read16(pld, index + 2) << 16; |
| 238 | } |
| 239 | EXPORT_SYMBOL_GPL(kempld_read32); |
| 240 | |
| 241 | /** |
| 242 | * kempld_write32 - write 32 bit register |
| 243 | * @pld: kempld_device_data structure describing the PLD |
| 244 | * @index: register index on the chip |
| 245 | * @data: new register value |
| 246 | * |
| 247 | * kempld_get_mutex must be called prior to calling this function. |
| 248 | */ |
| 249 | void kempld_write32(struct kempld_device_data *pld, u8 index, u32 data) |
| 250 | { |
| 251 | kempld_write16(pld, index, (u16)data); |
| 252 | kempld_write16(pld, index + 2, (u16)(data >> 16)); |
| 253 | } |
| 254 | EXPORT_SYMBOL_GPL(kempld_write32); |
| 255 | |
| 256 | /** |
| 257 | * kempld_get_mutex - acquire PLD mutex |
| 258 | * @pld: kempld_device_data structure describing the PLD |
| 259 | */ |
| 260 | void kempld_get_mutex(struct kempld_device_data *pld) |
| 261 | { |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 262 | struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 263 | |
| 264 | mutex_lock(&pld->lock); |
| 265 | pdata->get_hardware_mutex(pld); |
| 266 | } |
| 267 | EXPORT_SYMBOL_GPL(kempld_get_mutex); |
| 268 | |
| 269 | /** |
| 270 | * kempld_release_mutex - release PLD mutex |
| 271 | * @pld: kempld_device_data structure describing the PLD |
| 272 | */ |
| 273 | void kempld_release_mutex(struct kempld_device_data *pld) |
| 274 | { |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 275 | struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 276 | |
| 277 | pdata->release_hardware_mutex(pld); |
| 278 | mutex_unlock(&pld->lock); |
| 279 | } |
| 280 | EXPORT_SYMBOL_GPL(kempld_release_mutex); |
| 281 | |
| 282 | /** |
| 283 | * kempld_get_info - update device specific information |
| 284 | * @pld: kempld_device_data structure describing the PLD |
| 285 | * |
| 286 | * This function calls the configured board specific kempld_get_info_XXXX |
| 287 | * function which is responsible for gathering information about the specific |
| 288 | * hardware. The information is then stored within the pld structure. |
| 289 | */ |
| 290 | static int kempld_get_info(struct kempld_device_data *pld) |
| 291 | { |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 292 | int ret; |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 293 | struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 294 | char major, minor; |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 295 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 296 | ret = pdata->get_info(pld); |
| 297 | if (ret) |
| 298 | return ret; |
| 299 | |
| 300 | /* The Kontron PLD firmware version string has the following format: |
| 301 | * Pwxy.zzzz |
| 302 | * P: Fixed |
| 303 | * w: PLD number - 1 hex digit |
| 304 | * x: Major version - 1 alphanumerical digit (0-9A-V) |
| 305 | * y: Minor version - 1 alphanumerical digit (0-9A-V) |
| 306 | * zzzz: Build number - 4 zero padded hex digits */ |
| 307 | |
| 308 | if (pld->info.major < 10) |
| 309 | major = pld->info.major + '0'; |
| 310 | else |
| 311 | major = (pld->info.major - 10) + 'A'; |
| 312 | if (pld->info.minor < 10) |
| 313 | minor = pld->info.minor + '0'; |
| 314 | else |
| 315 | minor = (pld->info.minor - 10) + 'A'; |
| 316 | |
| 317 | ret = scnprintf(pld->info.version, sizeof(pld->info.version), |
| 318 | "P%X%c%c.%04X", pld->info.number, major, minor, |
| 319 | pld->info.buildnr); |
| 320 | if (ret < 0) |
| 321 | return ret; |
| 322 | |
| 323 | return 0; |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 324 | } |
| 325 | |
| 326 | /* |
| 327 | * kempld_register_cells - register cell drivers |
| 328 | * |
| 329 | * This function registers cell drivers for the detected hardware by calling |
| 330 | * the configured kempld_register_cells_XXXX function which is responsible |
| 331 | * to detect and register the needed cell drivers. |
| 332 | */ |
| 333 | static int kempld_register_cells(struct kempld_device_data *pld) |
| 334 | { |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 335 | struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 336 | |
| 337 | return pdata->register_cells(pld); |
| 338 | } |
| 339 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 340 | static const char *kempld_get_type_string(struct kempld_device_data *pld) |
| 341 | { |
| 342 | const char *version_type; |
| 343 | |
| 344 | switch (pld->info.type) { |
| 345 | case 0: |
| 346 | version_type = "release"; |
| 347 | break; |
| 348 | case 1: |
| 349 | version_type = "debug"; |
| 350 | break; |
| 351 | case 2: |
| 352 | version_type = "custom"; |
| 353 | break; |
| 354 | default: |
| 355 | version_type = "unspecified"; |
| 356 | break; |
| 357 | } |
| 358 | |
| 359 | return version_type; |
| 360 | } |
| 361 | |
| 362 | static ssize_t kempld_version_show(struct device *dev, |
| 363 | struct device_attribute *attr, char *buf) |
| 364 | { |
| 365 | struct kempld_device_data *pld = dev_get_drvdata(dev); |
| 366 | |
| 367 | return scnprintf(buf, PAGE_SIZE, "%s\n", pld->info.version); |
| 368 | } |
| 369 | |
| 370 | static ssize_t kempld_specification_show(struct device *dev, |
| 371 | struct device_attribute *attr, char *buf) |
| 372 | { |
| 373 | struct kempld_device_data *pld = dev_get_drvdata(dev); |
| 374 | |
| 375 | return scnprintf(buf, PAGE_SIZE, "%d.%d\n", pld->info.spec_major, |
| 376 | pld->info.spec_minor); |
| 377 | } |
| 378 | |
| 379 | static ssize_t kempld_type_show(struct device *dev, |
| 380 | struct device_attribute *attr, char *buf) |
| 381 | { |
| 382 | struct kempld_device_data *pld = dev_get_drvdata(dev); |
| 383 | |
| 384 | return scnprintf(buf, PAGE_SIZE, "%s\n", kempld_get_type_string(pld)); |
| 385 | } |
| 386 | |
| 387 | static DEVICE_ATTR(pld_version, S_IRUGO, kempld_version_show, NULL); |
| 388 | static DEVICE_ATTR(pld_specification, S_IRUGO, kempld_specification_show, |
| 389 | NULL); |
| 390 | static DEVICE_ATTR(pld_type, S_IRUGO, kempld_type_show, NULL); |
| 391 | |
| 392 | static struct attribute *pld_attributes[] = { |
| 393 | &dev_attr_pld_version.attr, |
| 394 | &dev_attr_pld_specification.attr, |
| 395 | &dev_attr_pld_type.attr, |
| 396 | NULL |
| 397 | }; |
| 398 | |
| 399 | static const struct attribute_group pld_attr_group = { |
| 400 | .attrs = pld_attributes, |
| 401 | }; |
| 402 | |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 403 | static int kempld_detect_device(struct kempld_device_data *pld) |
| 404 | { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 405 | u8 index_reg; |
| 406 | int ret; |
| 407 | |
| 408 | mutex_lock(&pld->lock); |
| 409 | |
| 410 | /* Check for empty IO space */ |
| 411 | index_reg = ioread8(pld->io_index); |
| 412 | if (index_reg == 0xff && ioread8(pld->io_data) == 0xff) { |
| 413 | mutex_unlock(&pld->lock); |
| 414 | return -ENODEV; |
| 415 | } |
| 416 | |
Guenter Roeck | 204747c | 2014-03-20 08:12:28 -0700 | [diff] [blame] | 417 | /* Release hardware mutex if acquired */ |
| 418 | if (!(index_reg & KEMPLD_MUTEX_KEY)) { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 419 | iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); |
Guenter Roeck | 204747c | 2014-03-20 08:12:28 -0700 | [diff] [blame] | 420 | /* PXT and COMe-cPC2 boards may require a second release */ |
| 421 | iowrite8(KEMPLD_MUTEX_KEY, pld->io_index); |
| 422 | } |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 423 | |
| 424 | mutex_unlock(&pld->lock); |
| 425 | |
| 426 | ret = kempld_get_info(pld); |
| 427 | if (ret) |
| 428 | return ret; |
| 429 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 430 | dev_info(pld->dev, "Found Kontron PLD - %s (%s), spec %d.%d\n", |
| 431 | pld->info.version, kempld_get_type_string(pld), |
| 432 | pld->info.spec_major, pld->info.spec_minor); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 433 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 434 | ret = sysfs_create_group(&pld->dev->kobj, &pld_attr_group); |
| 435 | if (ret) |
| 436 | return ret; |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 437 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 438 | ret = kempld_register_cells(pld); |
| 439 | if (ret) |
| 440 | sysfs_remove_group(&pld->dev->kobj, &pld_attr_group); |
| 441 | |
| 442 | return ret; |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 443 | } |
| 444 | |
| 445 | static int kempld_probe(struct platform_device *pdev) |
| 446 | { |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 447 | struct kempld_platform_data *pdata = dev_get_platdata(&pdev->dev); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 448 | struct device *dev = &pdev->dev; |
| 449 | struct kempld_device_data *pld; |
| 450 | struct resource *ioport; |
| 451 | int ret; |
| 452 | |
| 453 | pld = devm_kzalloc(dev, sizeof(*pld), GFP_KERNEL); |
| 454 | if (!pld) |
| 455 | return -ENOMEM; |
| 456 | |
| 457 | ioport = platform_get_resource(pdev, IORESOURCE_IO, 0); |
| 458 | if (!ioport) |
| 459 | return -EINVAL; |
| 460 | |
| 461 | pld->io_base = devm_ioport_map(dev, ioport->start, |
| 462 | ioport->end - ioport->start); |
| 463 | if (!pld->io_base) |
| 464 | return -ENOMEM; |
| 465 | |
| 466 | pld->io_index = pld->io_base; |
| 467 | pld->io_data = pld->io_base + 1; |
| 468 | pld->pld_clock = pdata->pld_clock; |
| 469 | pld->dev = dev; |
| 470 | |
| 471 | mutex_init(&pld->lock); |
| 472 | platform_set_drvdata(pdev, pld); |
| 473 | |
| 474 | ret = kempld_detect_device(pld); |
| 475 | if (ret) |
| 476 | return ret; |
| 477 | |
| 478 | return 0; |
| 479 | } |
| 480 | |
| 481 | static int kempld_remove(struct platform_device *pdev) |
| 482 | { |
| 483 | struct kempld_device_data *pld = platform_get_drvdata(pdev); |
Jingoo Han | 334a41c | 2013-07-30 17:10:05 +0900 | [diff] [blame] | 484 | struct kempld_platform_data *pdata = dev_get_platdata(pld->dev); |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 485 | |
Michael Brunner | 58a9e5b | 2014-04-08 08:21:06 +0200 | [diff] [blame] | 486 | sysfs_remove_group(&pld->dev->kobj, &pld_attr_group); |
| 487 | |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 488 | mfd_remove_devices(&pdev->dev); |
| 489 | pdata->release_hardware_mutex(pld); |
| 490 | |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | static struct platform_driver kempld_driver = { |
| 495 | .driver = { |
| 496 | .name = "kempld", |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 497 | }, |
| 498 | .probe = kempld_probe, |
| 499 | .remove = kempld_remove, |
| 500 | }; |
| 501 | |
Lee Jones | 9ef4e93 | 2014-07-21 16:47:51 +0100 | [diff] [blame] | 502 | static struct dmi_system_id kempld_dmi_table[] __initdata = { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 503 | { |
Michael Brunner | c1d33b1 | 2013-08-09 17:33:43 +0200 | [diff] [blame] | 504 | .ident = "BHL6", |
| 505 | .matches = { |
| 506 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 507 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bHL6"), |
| 508 | }, |
| 509 | .driver_data = (void *)&kempld_platform_data_generic, |
| 510 | .callback = kempld_create_platform_device, |
| 511 | }, |
| 512 | { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 513 | .ident = "CCR2", |
| 514 | .matches = { |
| 515 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 516 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP2"), |
| 517 | }, |
| 518 | .driver_data = (void *)&kempld_platform_data_generic, |
| 519 | .callback = kempld_create_platform_device, |
| 520 | }, { |
| 521 | .ident = "CCR6", |
| 522 | .matches = { |
| 523 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 524 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bIP6"), |
| 525 | }, |
| 526 | .driver_data = (void *)&kempld_platform_data_generic, |
| 527 | .callback = kempld_create_platform_device, |
| 528 | }, { |
Michael Brunner | a3ee750 | 2014-02-24 08:53:46 +0100 | [diff] [blame] | 529 | .ident = "CHL6", |
| 530 | .matches = { |
| 531 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 532 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cHL6"), |
| 533 | }, |
| 534 | .driver_data = (void *)&kempld_platform_data_generic, |
| 535 | .callback = kempld_create_platform_device, |
| 536 | }, { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 537 | .ident = "CHR2", |
| 538 | .matches = { |
| 539 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 540 | DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T2"), |
| 541 | }, |
| 542 | .driver_data = (void *)&kempld_platform_data_generic, |
| 543 | .callback = kempld_create_platform_device, |
| 544 | }, { |
| 545 | .ident = "CHR2", |
| 546 | .matches = { |
| 547 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 548 | DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T2"), |
| 549 | }, |
| 550 | .driver_data = (void *)&kempld_platform_data_generic, |
| 551 | .callback = kempld_create_platform_device, |
| 552 | }, { |
| 553 | .ident = "CHR2", |
| 554 | .matches = { |
| 555 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 556 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC2"), |
| 557 | }, |
| 558 | .driver_data = (void *)&kempld_platform_data_generic, |
| 559 | .callback = kempld_create_platform_device, |
| 560 | }, { |
| 561 | .ident = "CHR6", |
| 562 | .matches = { |
| 563 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 564 | DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-SC T6"), |
| 565 | }, |
| 566 | .driver_data = (void *)&kempld_platform_data_generic, |
| 567 | .callback = kempld_create_platform_device, |
| 568 | }, { |
| 569 | .ident = "CHR6", |
| 570 | .matches = { |
| 571 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 572 | DMI_MATCH(DMI_BOARD_NAME, "ETXe-SC T6"), |
| 573 | }, |
| 574 | .driver_data = (void *)&kempld_platform_data_generic, |
| 575 | .callback = kempld_create_platform_device, |
| 576 | }, { |
| 577 | .ident = "CHR6", |
| 578 | .matches = { |
| 579 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 580 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bSC6"), |
| 581 | }, |
| 582 | .driver_data = (void *)&kempld_platform_data_generic, |
| 583 | .callback = kempld_create_platform_device, |
| 584 | }, { |
| 585 | .ident = "CNTG", |
| 586 | .matches = { |
| 587 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 588 | DMI_MATCH(DMI_BOARD_NAME, "ETXexpress-PC"), |
| 589 | }, |
| 590 | .driver_data = (void *)&kempld_platform_data_generic, |
| 591 | .callback = kempld_create_platform_device, |
| 592 | }, { |
| 593 | .ident = "CNTG", |
| 594 | .matches = { |
| 595 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 596 | DMI_MATCH(DMI_BOARD_NAME, "COMe-bPC2"), |
| 597 | }, |
| 598 | .driver_data = (void *)&kempld_platform_data_generic, |
| 599 | .callback = kempld_create_platform_device, |
| 600 | }, { |
| 601 | .ident = "CNTX", |
| 602 | .matches = { |
| 603 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 604 | DMI_MATCH(DMI_BOARD_NAME, "PXT"), |
| 605 | }, |
| 606 | .driver_data = (void *)&kempld_platform_data_generic, |
| 607 | .callback = kempld_create_platform_device, |
| 608 | }, { |
Michael Brunner | a3ee750 | 2014-02-24 08:53:46 +0100 | [diff] [blame] | 609 | .ident = "CVV6", |
| 610 | .matches = { |
| 611 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 612 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cBT"), |
| 613 | }, |
| 614 | .driver_data = (void *)&kempld_platform_data_generic, |
| 615 | .callback = kempld_create_platform_device, |
| 616 | }, { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 617 | .ident = "FRI2", |
| 618 | .matches = { |
| 619 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 620 | DMI_MATCH(DMI_BIOS_VERSION, "FRI2"), |
| 621 | }, |
| 622 | .driver_data = (void *)&kempld_platform_data_generic, |
| 623 | .callback = kempld_create_platform_device, |
| 624 | }, { |
| 625 | .ident = "FRI2", |
| 626 | .matches = { |
| 627 | DMI_MATCH(DMI_PRODUCT_NAME, "Fish River Island II"), |
| 628 | }, |
| 629 | .driver_data = (void *)&kempld_platform_data_generic, |
| 630 | .callback = kempld_create_platform_device, |
| 631 | }, { |
| 632 | .ident = "MBR1", |
| 633 | .matches = { |
| 634 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 635 | DMI_MATCH(DMI_BOARD_NAME, "ETX-OH"), |
| 636 | }, |
| 637 | .driver_data = (void *)&kempld_platform_data_generic, |
| 638 | .callback = kempld_create_platform_device, |
| 639 | }, { |
Michael Brunner | a3ee750 | 2014-02-24 08:53:46 +0100 | [diff] [blame] | 640 | .ident = "MVV1", |
| 641 | .matches = { |
| 642 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 643 | DMI_MATCH(DMI_BOARD_NAME, "COMe-mBT"), |
| 644 | }, |
| 645 | .driver_data = (void *)&kempld_platform_data_generic, |
| 646 | .callback = kempld_create_platform_device, |
| 647 | }, { |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 648 | .ident = "NTC1", |
| 649 | .matches = { |
| 650 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 651 | DMI_MATCH(DMI_BOARD_NAME, "nanoETXexpress-TT"), |
| 652 | }, |
| 653 | .driver_data = (void *)&kempld_platform_data_generic, |
| 654 | .callback = kempld_create_platform_device, |
| 655 | }, { |
| 656 | .ident = "NTC1", |
| 657 | .matches = { |
| 658 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 659 | DMI_MATCH(DMI_BOARD_NAME, "nETXe-TT"), |
| 660 | }, |
| 661 | .driver_data = (void *)&kempld_platform_data_generic, |
| 662 | .callback = kempld_create_platform_device, |
| 663 | }, { |
| 664 | .ident = "NTC1", |
| 665 | .matches = { |
| 666 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 667 | DMI_MATCH(DMI_BOARD_NAME, "COMe-mTT"), |
| 668 | }, |
| 669 | .driver_data = (void *)&kempld_platform_data_generic, |
| 670 | .callback = kempld_create_platform_device, |
| 671 | }, { |
| 672 | .ident = "NUP1", |
| 673 | .matches = { |
| 674 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 675 | DMI_MATCH(DMI_BOARD_NAME, "COMe-mCT"), |
| 676 | }, |
| 677 | .driver_data = (void *)&kempld_platform_data_generic, |
| 678 | .callback = kempld_create_platform_device, |
| 679 | }, { |
| 680 | .ident = "UNP1", |
| 681 | .matches = { |
| 682 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 683 | DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-DC"), |
| 684 | }, |
| 685 | .driver_data = (void *)&kempld_platform_data_generic, |
| 686 | .callback = kempld_create_platform_device, |
| 687 | }, { |
| 688 | .ident = "UNP1", |
| 689 | .matches = { |
| 690 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 691 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cDC2"), |
| 692 | }, |
| 693 | .driver_data = (void *)&kempld_platform_data_generic, |
| 694 | .callback = kempld_create_platform_device, |
| 695 | }, { |
| 696 | .ident = "UNTG", |
| 697 | .matches = { |
| 698 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 699 | DMI_MATCH(DMI_BOARD_NAME, "microETXexpress-PC"), |
| 700 | }, |
| 701 | .driver_data = (void *)&kempld_platform_data_generic, |
| 702 | .callback = kempld_create_platform_device, |
| 703 | }, { |
| 704 | .ident = "UNTG", |
| 705 | .matches = { |
| 706 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 707 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cPC2"), |
| 708 | }, |
| 709 | .driver_data = (void *)&kempld_platform_data_generic, |
| 710 | .callback = kempld_create_platform_device, |
| 711 | }, { |
| 712 | .ident = "UUP6", |
| 713 | .matches = { |
| 714 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 715 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cCT6"), |
| 716 | }, |
| 717 | .driver_data = (void *)&kempld_platform_data_generic, |
| 718 | .callback = kempld_create_platform_device, |
| 719 | }, |
Michael Brunner | c1d33b1 | 2013-08-09 17:33:43 +0200 | [diff] [blame] | 720 | { |
| 721 | .ident = "UTH6", |
| 722 | .matches = { |
| 723 | DMI_MATCH(DMI_BOARD_VENDOR, "Kontron"), |
| 724 | DMI_MATCH(DMI_BOARD_NAME, "COMe-cTH6"), |
| 725 | }, |
| 726 | .driver_data = (void *)&kempld_platform_data_generic, |
| 727 | .callback = kempld_create_platform_device, |
| 728 | }, |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 729 | {} |
| 730 | }; |
| 731 | MODULE_DEVICE_TABLE(dmi, kempld_dmi_table); |
| 732 | |
| 733 | static int __init kempld_init(void) |
| 734 | { |
| 735 | const struct dmi_system_id *id; |
| 736 | int ret; |
| 737 | |
| 738 | if (force_device_id[0]) { |
Lee Jones | 9ef4e93 | 2014-07-21 16:47:51 +0100 | [diff] [blame] | 739 | for (id = kempld_dmi_table; |
| 740 | id->matches[0].slot != DMI_NONE; id++) |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 741 | if (strstr(id->ident, force_device_id)) |
Ameya Palande | c864850 | 2015-02-26 12:05:51 -0800 | [diff] [blame] | 742 | if (id->callback && !id->callback(id)) |
Kevin Strasser | 43620a1 | 2013-06-23 21:00:03 -0700 | [diff] [blame] | 743 | break; |
| 744 | if (id->matches[0].slot == DMI_NONE) |
| 745 | return -ENODEV; |
| 746 | } else { |
| 747 | if (!dmi_check_system(kempld_dmi_table)) |
| 748 | return -ENODEV; |
| 749 | } |
| 750 | |
| 751 | ret = platform_driver_register(&kempld_driver); |
| 752 | if (ret) |
| 753 | return ret; |
| 754 | |
| 755 | return 0; |
| 756 | } |
| 757 | |
| 758 | static void __exit kempld_exit(void) |
| 759 | { |
| 760 | if (kempld_pdev) |
| 761 | platform_device_unregister(kempld_pdev); |
| 762 | |
| 763 | platform_driver_unregister(&kempld_driver); |
| 764 | } |
| 765 | |
| 766 | module_init(kempld_init); |
| 767 | module_exit(kempld_exit); |
| 768 | |
| 769 | MODULE_DESCRIPTION("KEM PLD Core Driver"); |
| 770 | MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>"); |
| 771 | MODULE_LICENSE("GPL"); |
| 772 | MODULE_ALIAS("platform:kempld-core"); |