1 /* 2 * Copyright (C) ST-Ericsson SA 2010 3 * 4 * License Terms: GNU General Public License v2 5 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com> 6 * Author: Rabin Vincent <rabin.vincent@stericsson.com> 7 * Author: Mattias Wallin <mattias.wallin@stericsson.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/slab.h> 12 #include <linux/init.h> 13 #include <linux/irq.h> 14 #include <linux/delay.h> 15 #include <linux/interrupt.h> 16 #include <linux/module.h> 17 #include <linux/platform_device.h> 18 #include <linux/mfd/core.h> 19 #include <linux/mfd/abx500.h> 20 #include <linux/mfd/ab8500.h> 21 #include <linux/regulator/ab8500.h> 22 23 /* 24 * Interrupt register offsets 25 * Bank : 0x0E 26 */ 27 #define AB8500_IT_SOURCE1_REG 0x00 28 #define AB8500_IT_SOURCE2_REG 0x01 29 #define AB8500_IT_SOURCE3_REG 0x02 30 #define AB8500_IT_SOURCE4_REG 0x03 31 #define AB8500_IT_SOURCE5_REG 0x04 32 #define AB8500_IT_SOURCE6_REG 0x05 33 #define AB8500_IT_SOURCE7_REG 0x06 34 #define AB8500_IT_SOURCE8_REG 0x07 35 #define AB8500_IT_SOURCE19_REG 0x12 36 #define AB8500_IT_SOURCE20_REG 0x13 37 #define AB8500_IT_SOURCE21_REG 0x14 38 #define AB8500_IT_SOURCE22_REG 0x15 39 #define AB8500_IT_SOURCE23_REG 0x16 40 #define AB8500_IT_SOURCE24_REG 0x17 41 42 /* 43 * latch registers 44 */ 45 #define AB8500_IT_LATCH1_REG 0x20 46 #define AB8500_IT_LATCH2_REG 0x21 47 #define AB8500_IT_LATCH3_REG 0x22 48 #define AB8500_IT_LATCH4_REG 0x23 49 #define AB8500_IT_LATCH5_REG 0x24 50 #define AB8500_IT_LATCH6_REG 0x25 51 #define AB8500_IT_LATCH7_REG 0x26 52 #define AB8500_IT_LATCH8_REG 0x27 53 #define AB8500_IT_LATCH9_REG 0x28 54 #define AB8500_IT_LATCH10_REG 0x29 55 #define AB8500_IT_LATCH12_REG 0x2B 56 #define AB8500_IT_LATCH19_REG 0x32 57 #define AB8500_IT_LATCH20_REG 0x33 58 #define AB8500_IT_LATCH21_REG 0x34 59 #define AB8500_IT_LATCH22_REG 0x35 60 #define AB8500_IT_LATCH23_REG 0x36 61 #define AB8500_IT_LATCH24_REG 0x37 62 63 /* 64 * mask registers 65 */ 66 67 #define AB8500_IT_MASK1_REG 0x40 68 #define AB8500_IT_MASK2_REG 0x41 69 #define AB8500_IT_MASK3_REG 0x42 70 #define AB8500_IT_MASK4_REG 0x43 71 #define AB8500_IT_MASK5_REG 0x44 72 #define AB8500_IT_MASK6_REG 0x45 73 #define AB8500_IT_MASK7_REG 0x46 74 #define AB8500_IT_MASK8_REG 0x47 75 #define AB8500_IT_MASK9_REG 0x48 76 #define AB8500_IT_MASK10_REG 0x49 77 #define AB8500_IT_MASK11_REG 0x4A 78 #define AB8500_IT_MASK12_REG 0x4B 79 #define AB8500_IT_MASK13_REG 0x4C 80 #define AB8500_IT_MASK14_REG 0x4D 81 #define AB8500_IT_MASK15_REG 0x4E 82 #define AB8500_IT_MASK16_REG 0x4F 83 #define AB8500_IT_MASK17_REG 0x50 84 #define AB8500_IT_MASK18_REG 0x51 85 #define AB8500_IT_MASK19_REG 0x52 86 #define AB8500_IT_MASK20_REG 0x53 87 #define AB8500_IT_MASK21_REG 0x54 88 #define AB8500_IT_MASK22_REG 0x55 89 #define AB8500_IT_MASK23_REG 0x56 90 #define AB8500_IT_MASK24_REG 0x57 91 92 #define AB8500_REV_REG 0x80 93 #define AB8500_SWITCH_OFF_STATUS 0x00 94 95 /* 96 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt 97 * numbers are indexed into this array with (num / 8). 98 * 99 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at 100 * offset 0. 101 */ 102 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = { 103 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 104 }; 105 106 static int ab8500_get_chip_id(struct device *dev) 107 { 108 struct ab8500 *ab8500; 109 110 if (!dev) 111 return -EINVAL; 112 ab8500 = dev_get_drvdata(dev->parent); 113 return ab8500 ? (int)ab8500->chip_id : -EINVAL; 114 } 115 116 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank, 117 u8 reg, u8 data) 118 { 119 int ret; 120 /* 121 * Put the u8 bank and u8 register together into a an u16. 122 * The bank on higher 8 bits and register in lower 8 bits. 123 * */ 124 u16 addr = ((u16)bank) << 8 | reg; 125 126 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data); 127 128 ret = mutex_lock_interruptible(&ab8500->lock); 129 if (ret) 130 return ret; 131 132 ret = ab8500->write(ab8500, addr, data); 133 if (ret < 0) 134 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 135 addr, ret); 136 mutex_unlock(&ab8500->lock); 137 138 return ret; 139 } 140 141 static int ab8500_set_register(struct device *dev, u8 bank, 142 u8 reg, u8 value) 143 { 144 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 145 146 return set_register_interruptible(ab8500, bank, reg, value); 147 } 148 149 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, 150 u8 reg, u8 *value) 151 { 152 int ret; 153 /* put the u8 bank and u8 reg together into a an u16. 154 * bank on higher 8 bits and reg in lower */ 155 u16 addr = ((u16)bank) << 8 | reg; 156 157 ret = mutex_lock_interruptible(&ab8500->lock); 158 if (ret) 159 return ret; 160 161 ret = ab8500->read(ab8500, addr); 162 if (ret < 0) 163 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 164 addr, ret); 165 else 166 *value = ret; 167 168 mutex_unlock(&ab8500->lock); 169 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); 170 171 return ret; 172 } 173 174 static int ab8500_get_register(struct device *dev, u8 bank, 175 u8 reg, u8 *value) 176 { 177 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 178 179 return get_register_interruptible(ab8500, bank, reg, value); 180 } 181 182 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank, 183 u8 reg, u8 bitmask, u8 bitvalues) 184 { 185 int ret; 186 u8 data; 187 /* put the u8 bank and u8 reg together into a an u16. 188 * bank on higher 8 bits and reg in lower */ 189 u16 addr = ((u16)bank) << 8 | reg; 190 191 ret = mutex_lock_interruptible(&ab8500->lock); 192 if (ret) 193 return ret; 194 195 ret = ab8500->read(ab8500, addr); 196 if (ret < 0) { 197 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 198 addr, ret); 199 goto out; 200 } 201 202 data = (u8)ret; 203 data = (~bitmask & data) | (bitmask & bitvalues); 204 205 ret = ab8500->write(ab8500, addr, data); 206 if (ret < 0) 207 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 208 addr, ret); 209 210 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data); 211 out: 212 mutex_unlock(&ab8500->lock); 213 return ret; 214 } 215 216 static int ab8500_mask_and_set_register(struct device *dev, 217 u8 bank, u8 reg, u8 bitmask, u8 bitvalues) 218 { 219 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 220 221 return mask_and_set_register_interruptible(ab8500, bank, reg, 222 bitmask, bitvalues); 223 224 } 225 226 static struct abx500_ops ab8500_ops = { 227 .get_chip_id = ab8500_get_chip_id, 228 .get_register = ab8500_get_register, 229 .set_register = ab8500_set_register, 230 .get_register_page = NULL, 231 .set_register_page = NULL, 232 .mask_and_set_register = ab8500_mask_and_set_register, 233 .event_registers_startup_state_get = NULL, 234 .startup_irq_enabled = NULL, 235 }; 236 237 static void ab8500_irq_lock(struct irq_data *data) 238 { 239 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 240 241 mutex_lock(&ab8500->irq_lock); 242 } 243 244 static void ab8500_irq_sync_unlock(struct irq_data *data) 245 { 246 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 247 int i; 248 249 for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) { 250 u8 old = ab8500->oldmask[i]; 251 u8 new = ab8500->mask[i]; 252 int reg; 253 254 if (new == old) 255 continue; 256 257 /* Interrupt register 12 doesn't exist prior to version 2.0 */ 258 if (ab8500_irq_regoffset[i] == 11 && 259 ab8500->chip_id < AB8500_CUT2P0) 260 continue; 261 262 ab8500->oldmask[i] = new; 263 264 reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i]; 265 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new); 266 } 267 268 mutex_unlock(&ab8500->irq_lock); 269 } 270 271 static void ab8500_irq_mask(struct irq_data *data) 272 { 273 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 274 int offset = data->irq - ab8500->irq_base; 275 int index = offset / 8; 276 int mask = 1 << (offset % 8); 277 278 ab8500->mask[index] |= mask; 279 } 280 281 static void ab8500_irq_unmask(struct irq_data *data) 282 { 283 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 284 int offset = data->irq - ab8500->irq_base; 285 int index = offset / 8; 286 int mask = 1 << (offset % 8); 287 288 ab8500->mask[index] &= ~mask; 289 } 290 291 static struct irq_chip ab8500_irq_chip = { 292 .name = "ab8500", 293 .irq_bus_lock = ab8500_irq_lock, 294 .irq_bus_sync_unlock = ab8500_irq_sync_unlock, 295 .irq_mask = ab8500_irq_mask, 296 .irq_unmask = ab8500_irq_unmask, 297 }; 298 299 static irqreturn_t ab8500_irq(int irq, void *dev) 300 { 301 struct ab8500 *ab8500 = dev; 302 int i; 303 304 dev_vdbg(ab8500->dev, "interrupt\n"); 305 306 for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) { 307 int regoffset = ab8500_irq_regoffset[i]; 308 int status; 309 u8 value; 310 311 /* Interrupt register 12 doesn't exist prior to version 2.0 */ 312 if (regoffset == 11 && ab8500->chip_id < AB8500_CUT2P0) 313 continue; 314 315 status = get_register_interruptible(ab8500, AB8500_INTERRUPT, 316 AB8500_IT_LATCH1_REG + regoffset, &value); 317 if (status < 0 || value == 0) 318 continue; 319 320 do { 321 int bit = __ffs(value); 322 int line = i * 8 + bit; 323 324 handle_nested_irq(ab8500->irq_base + line); 325 value &= ~(1 << bit); 326 } while (value); 327 } 328 329 return IRQ_HANDLED; 330 } 331 332 static int ab8500_irq_init(struct ab8500 *ab8500) 333 { 334 int base = ab8500->irq_base; 335 int irq; 336 337 for (irq = base; irq < base + AB8500_NR_IRQS; irq++) { 338 irq_set_chip_data(irq, ab8500); 339 irq_set_chip_and_handler(irq, &ab8500_irq_chip, 340 handle_simple_irq); 341 irq_set_nested_thread(irq, 1); 342 #ifdef CONFIG_ARM 343 set_irq_flags(irq, IRQF_VALID); 344 #else 345 irq_set_noprobe(irq); 346 #endif 347 } 348 349 return 0; 350 } 351 352 static void ab8500_irq_remove(struct ab8500 *ab8500) 353 { 354 int base = ab8500->irq_base; 355 int irq; 356 357 for (irq = base; irq < base + AB8500_NR_IRQS; irq++) { 358 #ifdef CONFIG_ARM 359 set_irq_flags(irq, 0); 360 #endif 361 irq_set_chip_and_handler(irq, NULL, NULL); 362 irq_set_chip_data(irq, NULL); 363 } 364 } 365 366 static struct resource ab8500_gpio_resources[] = { 367 { 368 .name = "GPIO_INT6", 369 .start = AB8500_INT_GPIO6R, 370 .end = AB8500_INT_GPIO41F, 371 .flags = IORESOURCE_IRQ, 372 } 373 }; 374 375 static struct resource ab8500_gpadc_resources[] = { 376 { 377 .name = "HW_CONV_END", 378 .start = AB8500_INT_GP_HW_ADC_CONV_END, 379 .end = AB8500_INT_GP_HW_ADC_CONV_END, 380 .flags = IORESOURCE_IRQ, 381 }, 382 { 383 .name = "SW_CONV_END", 384 .start = AB8500_INT_GP_SW_ADC_CONV_END, 385 .end = AB8500_INT_GP_SW_ADC_CONV_END, 386 .flags = IORESOURCE_IRQ, 387 }, 388 }; 389 390 static struct resource ab8500_rtc_resources[] = { 391 { 392 .name = "60S", 393 .start = AB8500_INT_RTC_60S, 394 .end = AB8500_INT_RTC_60S, 395 .flags = IORESOURCE_IRQ, 396 }, 397 { 398 .name = "ALARM", 399 .start = AB8500_INT_RTC_ALARM, 400 .end = AB8500_INT_RTC_ALARM, 401 .flags = IORESOURCE_IRQ, 402 }, 403 }; 404 405 static struct resource ab8500_poweronkey_db_resources[] = { 406 { 407 .name = "ONKEY_DBF", 408 .start = AB8500_INT_PON_KEY1DB_F, 409 .end = AB8500_INT_PON_KEY1DB_F, 410 .flags = IORESOURCE_IRQ, 411 }, 412 { 413 .name = "ONKEY_DBR", 414 .start = AB8500_INT_PON_KEY1DB_R, 415 .end = AB8500_INT_PON_KEY1DB_R, 416 .flags = IORESOURCE_IRQ, 417 }, 418 }; 419 420 static struct resource ab8500_bm_resources[] = { 421 { 422 .name = "MAIN_EXT_CH_NOT_OK", 423 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK, 424 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK, 425 .flags = IORESOURCE_IRQ, 426 }, 427 { 428 .name = "BATT_OVV", 429 .start = AB8500_INT_BATT_OVV, 430 .end = AB8500_INT_BATT_OVV, 431 .flags = IORESOURCE_IRQ, 432 }, 433 { 434 .name = "MAIN_CH_UNPLUG_DET", 435 .start = AB8500_INT_MAIN_CH_UNPLUG_DET, 436 .end = AB8500_INT_MAIN_CH_UNPLUG_DET, 437 .flags = IORESOURCE_IRQ, 438 }, 439 { 440 .name = "MAIN_CHARGE_PLUG_DET", 441 .start = AB8500_INT_MAIN_CH_PLUG_DET, 442 .end = AB8500_INT_MAIN_CH_PLUG_DET, 443 .flags = IORESOURCE_IRQ, 444 }, 445 { 446 .name = "VBUS_DET_F", 447 .start = AB8500_INT_VBUS_DET_F, 448 .end = AB8500_INT_VBUS_DET_F, 449 .flags = IORESOURCE_IRQ, 450 }, 451 { 452 .name = "VBUS_DET_R", 453 .start = AB8500_INT_VBUS_DET_R, 454 .end = AB8500_INT_VBUS_DET_R, 455 .flags = IORESOURCE_IRQ, 456 }, 457 { 458 .name = "BAT_CTRL_INDB", 459 .start = AB8500_INT_BAT_CTRL_INDB, 460 .end = AB8500_INT_BAT_CTRL_INDB, 461 .flags = IORESOURCE_IRQ, 462 }, 463 { 464 .name = "CH_WD_EXP", 465 .start = AB8500_INT_CH_WD_EXP, 466 .end = AB8500_INT_CH_WD_EXP, 467 .flags = IORESOURCE_IRQ, 468 }, 469 { 470 .name = "VBUS_OVV", 471 .start = AB8500_INT_VBUS_OVV, 472 .end = AB8500_INT_VBUS_OVV, 473 .flags = IORESOURCE_IRQ, 474 }, 475 { 476 .name = "NCONV_ACCU", 477 .start = AB8500_INT_CCN_CONV_ACC, 478 .end = AB8500_INT_CCN_CONV_ACC, 479 .flags = IORESOURCE_IRQ, 480 }, 481 { 482 .name = "LOW_BAT_F", 483 .start = AB8500_INT_LOW_BAT_F, 484 .end = AB8500_INT_LOW_BAT_F, 485 .flags = IORESOURCE_IRQ, 486 }, 487 { 488 .name = "LOW_BAT_R", 489 .start = AB8500_INT_LOW_BAT_R, 490 .end = AB8500_INT_LOW_BAT_R, 491 .flags = IORESOURCE_IRQ, 492 }, 493 { 494 .name = "BTEMP_LOW", 495 .start = AB8500_INT_BTEMP_LOW, 496 .end = AB8500_INT_BTEMP_LOW, 497 .flags = IORESOURCE_IRQ, 498 }, 499 { 500 .name = "BTEMP_HIGH", 501 .start = AB8500_INT_BTEMP_HIGH, 502 .end = AB8500_INT_BTEMP_HIGH, 503 .flags = IORESOURCE_IRQ, 504 }, 505 { 506 .name = "USB_CHARGER_NOT_OKR", 507 .start = AB8500_INT_USB_CHARGER_NOT_OK, 508 .end = AB8500_INT_USB_CHARGER_NOT_OK, 509 .flags = IORESOURCE_IRQ, 510 }, 511 { 512 .name = "USB_CHARGE_DET_DONE", 513 .start = AB8500_INT_USB_CHG_DET_DONE, 514 .end = AB8500_INT_USB_CHG_DET_DONE, 515 .flags = IORESOURCE_IRQ, 516 }, 517 { 518 .name = "USB_CH_TH_PROT_R", 519 .start = AB8500_INT_USB_CH_TH_PROT_R, 520 .end = AB8500_INT_USB_CH_TH_PROT_R, 521 .flags = IORESOURCE_IRQ, 522 }, 523 { 524 .name = "MAIN_CH_TH_PROT_R", 525 .start = AB8500_INT_MAIN_CH_TH_PROT_R, 526 .end = AB8500_INT_MAIN_CH_TH_PROT_R, 527 .flags = IORESOURCE_IRQ, 528 }, 529 { 530 .name = "USB_CHARGER_NOT_OKF", 531 .start = AB8500_INT_USB_CHARGER_NOT_OKF, 532 .end = AB8500_INT_USB_CHARGER_NOT_OKF, 533 .flags = IORESOURCE_IRQ, 534 }, 535 }; 536 537 static struct resource ab8500_debug_resources[] = { 538 { 539 .name = "IRQ_FIRST", 540 .start = AB8500_INT_MAIN_EXT_CH_NOT_OK, 541 .end = AB8500_INT_MAIN_EXT_CH_NOT_OK, 542 .flags = IORESOURCE_IRQ, 543 }, 544 { 545 .name = "IRQ_LAST", 546 .start = AB8500_INT_USB_CHARGER_NOT_OKF, 547 .end = AB8500_INT_USB_CHARGER_NOT_OKF, 548 .flags = IORESOURCE_IRQ, 549 }, 550 }; 551 552 static struct resource ab8500_usb_resources[] = { 553 { 554 .name = "ID_WAKEUP_R", 555 .start = AB8500_INT_ID_WAKEUP_R, 556 .end = AB8500_INT_ID_WAKEUP_R, 557 .flags = IORESOURCE_IRQ, 558 }, 559 { 560 .name = "ID_WAKEUP_F", 561 .start = AB8500_INT_ID_WAKEUP_F, 562 .end = AB8500_INT_ID_WAKEUP_F, 563 .flags = IORESOURCE_IRQ, 564 }, 565 { 566 .name = "VBUS_DET_F", 567 .start = AB8500_INT_VBUS_DET_F, 568 .end = AB8500_INT_VBUS_DET_F, 569 .flags = IORESOURCE_IRQ, 570 }, 571 { 572 .name = "VBUS_DET_R", 573 .start = AB8500_INT_VBUS_DET_R, 574 .end = AB8500_INT_VBUS_DET_R, 575 .flags = IORESOURCE_IRQ, 576 }, 577 { 578 .name = "USB_LINK_STATUS", 579 .start = AB8500_INT_USB_LINK_STATUS, 580 .end = AB8500_INT_USB_LINK_STATUS, 581 .flags = IORESOURCE_IRQ, 582 }, 583 }; 584 585 static struct resource ab8500_temp_resources[] = { 586 { 587 .name = "AB8500_TEMP_WARM", 588 .start = AB8500_INT_TEMP_WARM, 589 .end = AB8500_INT_TEMP_WARM, 590 .flags = IORESOURCE_IRQ, 591 }, 592 }; 593 594 static struct mfd_cell ab8500_devs[] = { 595 #ifdef CONFIG_DEBUG_FS 596 { 597 .name = "ab8500-debug", 598 .num_resources = ARRAY_SIZE(ab8500_debug_resources), 599 .resources = ab8500_debug_resources, 600 }, 601 #endif 602 { 603 .name = "ab8500-sysctrl", 604 }, 605 { 606 .name = "ab8500-regulator", 607 }, 608 { 609 .name = "ab8500-gpio", 610 .num_resources = ARRAY_SIZE(ab8500_gpio_resources), 611 .resources = ab8500_gpio_resources, 612 }, 613 { 614 .name = "ab8500-gpadc", 615 .num_resources = ARRAY_SIZE(ab8500_gpadc_resources), 616 .resources = ab8500_gpadc_resources, 617 }, 618 { 619 .name = "ab8500-rtc", 620 .num_resources = ARRAY_SIZE(ab8500_rtc_resources), 621 .resources = ab8500_rtc_resources, 622 }, 623 { 624 .name = "ab8500-bm", 625 .num_resources = ARRAY_SIZE(ab8500_bm_resources), 626 .resources = ab8500_bm_resources, 627 }, 628 { .name = "ab8500-codec", }, 629 { 630 .name = "ab8500-usb", 631 .num_resources = ARRAY_SIZE(ab8500_usb_resources), 632 .resources = ab8500_usb_resources, 633 }, 634 { 635 .name = "ab8500-poweron-key", 636 .num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources), 637 .resources = ab8500_poweronkey_db_resources, 638 }, 639 { 640 .name = "ab8500-pwm", 641 .id = 1, 642 }, 643 { 644 .name = "ab8500-pwm", 645 .id = 2, 646 }, 647 { 648 .name = "ab8500-pwm", 649 .id = 3, 650 }, 651 { .name = "ab8500-leds", }, 652 { 653 .name = "ab8500-denc", 654 }, 655 { 656 .name = "ab8500-temp", 657 .num_resources = ARRAY_SIZE(ab8500_temp_resources), 658 .resources = ab8500_temp_resources, 659 }, 660 }; 661 662 static ssize_t show_chip_id(struct device *dev, 663 struct device_attribute *attr, char *buf) 664 { 665 struct ab8500 *ab8500; 666 667 ab8500 = dev_get_drvdata(dev); 668 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); 669 } 670 671 /* 672 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 673 * 0x01 Swoff bit programming 674 * 0x02 Thermal protection activation 675 * 0x04 Vbat lower then BattOk falling threshold 676 * 0x08 Watchdog expired 677 * 0x10 Non presence of 32kHz clock 678 * 0x20 Battery level lower than power on reset threshold 679 * 0x40 Power on key 1 pressed longer than 10 seconds 680 * 0x80 DB8500 thermal shutdown 681 */ 682 static ssize_t show_switch_off_status(struct device *dev, 683 struct device_attribute *attr, char *buf) 684 { 685 int ret; 686 u8 value; 687 struct ab8500 *ab8500; 688 689 ab8500 = dev_get_drvdata(dev); 690 ret = get_register_interruptible(ab8500, AB8500_RTC, 691 AB8500_SWITCH_OFF_STATUS, &value); 692 if (ret < 0) 693 return ret; 694 return sprintf(buf, "%#x\n", value); 695 } 696 697 static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL); 698 static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL); 699 700 static struct attribute *ab8500_sysfs_entries[] = { 701 &dev_attr_chip_id.attr, 702 &dev_attr_switch_off_status.attr, 703 NULL, 704 }; 705 706 static struct attribute_group ab8500_attr_group = { 707 .attrs = ab8500_sysfs_entries, 708 }; 709 710 int __devinit ab8500_init(struct ab8500 *ab8500) 711 { 712 struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev); 713 int ret; 714 int i; 715 u8 value; 716 717 if (plat) 718 ab8500->irq_base = plat->irq_base; 719 720 mutex_init(&ab8500->lock); 721 mutex_init(&ab8500->irq_lock); 722 723 ret = get_register_interruptible(ab8500, AB8500_MISC, 724 AB8500_REV_REG, &value); 725 if (ret < 0) 726 return ret; 727 728 switch (value) { 729 case AB8500_CUTEARLY: 730 case AB8500_CUT1P0: 731 case AB8500_CUT1P1: 732 case AB8500_CUT2P0: 733 case AB8500_CUT3P0: 734 dev_info(ab8500->dev, "detected chip, revision: %#x\n", value); 735 break; 736 default: 737 dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value); 738 return -EINVAL; 739 } 740 ab8500->chip_id = value; 741 742 /* 743 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 744 * 0x01 Swoff bit programming 745 * 0x02 Thermal protection activation 746 * 0x04 Vbat lower then BattOk falling threshold 747 * 0x08 Watchdog expired 748 * 0x10 Non presence of 32kHz clock 749 * 0x20 Battery level lower than power on reset threshold 750 * 0x40 Power on key 1 pressed longer than 10 seconds 751 * 0x80 DB8500 thermal shutdown 752 */ 753 754 ret = get_register_interruptible(ab8500, AB8500_RTC, 755 AB8500_SWITCH_OFF_STATUS, &value); 756 if (ret < 0) 757 return ret; 758 dev_info(ab8500->dev, "switch off status: %#x", value); 759 760 if (plat && plat->init) 761 plat->init(ab8500); 762 763 /* Clear and mask all interrupts */ 764 for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) { 765 /* Interrupt register 12 doesn't exist prior to version 2.0 */ 766 if (ab8500_irq_regoffset[i] == 11 && 767 ab8500->chip_id < AB8500_CUT2P0) 768 continue; 769 770 get_register_interruptible(ab8500, AB8500_INTERRUPT, 771 AB8500_IT_LATCH1_REG + ab8500_irq_regoffset[i], 772 &value); 773 set_register_interruptible(ab8500, AB8500_INTERRUPT, 774 AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i], 0xff); 775 } 776 777 ret = abx500_register_ops(ab8500->dev, &ab8500_ops); 778 if (ret) 779 return ret; 780 781 for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) 782 ab8500->mask[i] = ab8500->oldmask[i] = 0xff; 783 784 if (ab8500->irq_base) { 785 ret = ab8500_irq_init(ab8500); 786 if (ret) 787 return ret; 788 789 ret = request_threaded_irq(ab8500->irq, NULL, ab8500_irq, 790 IRQF_ONESHOT | IRQF_NO_SUSPEND, 791 "ab8500", ab8500); 792 if (ret) 793 goto out_removeirq; 794 } 795 796 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs, 797 ARRAY_SIZE(ab8500_devs), NULL, 798 ab8500->irq_base); 799 if (ret) 800 goto out_freeirq; 801 802 ret = sysfs_create_group(&ab8500->dev->kobj, &ab8500_attr_group); 803 if (ret) 804 dev_err(ab8500->dev, "error creating sysfs entries\n"); 805 806 return ret; 807 808 out_freeirq: 809 if (ab8500->irq_base) { 810 free_irq(ab8500->irq, ab8500); 811 out_removeirq: 812 ab8500_irq_remove(ab8500); 813 } 814 return ret; 815 } 816 817 int __devexit ab8500_exit(struct ab8500 *ab8500) 818 { 819 sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group); 820 mfd_remove_devices(ab8500->dev); 821 if (ab8500->irq_base) { 822 free_irq(ab8500->irq, ab8500); 823 ab8500_irq_remove(ab8500); 824 } 825 826 return 0; 827 } 828 829 MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent"); 830 MODULE_DESCRIPTION("AB8500 MFD core"); 831 MODULE_LICENSE("GPL v2"); 832