1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) ST-Ericsson SA 2010 4 * 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/irqdomain.h> 15 #include <linux/delay.h> 16 #include <linux/interrupt.h> 17 #include <linux/moduleparam.h> 18 #include <linux/platform_device.h> 19 #include <linux/mfd/core.h> 20 #include <linux/mfd/abx500.h> 21 #include <linux/mfd/abx500/ab8500.h> 22 #include <linux/mfd/dbx500-prcmu.h> 23 #include <linux/of.h> 24 25 /* 26 * Interrupt register offsets 27 * Bank : 0x0E 28 */ 29 #define AB8500_IT_SOURCE1_REG 0x00 30 #define AB8500_IT_SOURCE2_REG 0x01 31 #define AB8500_IT_SOURCE3_REG 0x02 32 #define AB8500_IT_SOURCE4_REG 0x03 33 #define AB8500_IT_SOURCE5_REG 0x04 34 #define AB8500_IT_SOURCE6_REG 0x05 35 #define AB8500_IT_SOURCE7_REG 0x06 36 #define AB8500_IT_SOURCE8_REG 0x07 37 #define AB9540_IT_SOURCE13_REG 0x0C 38 #define AB8500_IT_SOURCE19_REG 0x12 39 #define AB8500_IT_SOURCE20_REG 0x13 40 #define AB8500_IT_SOURCE21_REG 0x14 41 #define AB8500_IT_SOURCE22_REG 0x15 42 #define AB8500_IT_SOURCE23_REG 0x16 43 #define AB8500_IT_SOURCE24_REG 0x17 44 45 /* 46 * latch registers 47 */ 48 #define AB8500_IT_LATCH1_REG 0x20 49 #define AB8500_IT_LATCH2_REG 0x21 50 #define AB8500_IT_LATCH3_REG 0x22 51 #define AB8500_IT_LATCH4_REG 0x23 52 #define AB8500_IT_LATCH5_REG 0x24 53 #define AB8500_IT_LATCH6_REG 0x25 54 #define AB8500_IT_LATCH7_REG 0x26 55 #define AB8500_IT_LATCH8_REG 0x27 56 #define AB8500_IT_LATCH9_REG 0x28 57 #define AB8500_IT_LATCH10_REG 0x29 58 #define AB8500_IT_LATCH12_REG 0x2B 59 #define AB9540_IT_LATCH13_REG 0x2C 60 #define AB8500_IT_LATCH19_REG 0x32 61 #define AB8500_IT_LATCH20_REG 0x33 62 #define AB8500_IT_LATCH21_REG 0x34 63 #define AB8500_IT_LATCH22_REG 0x35 64 #define AB8500_IT_LATCH23_REG 0x36 65 #define AB8500_IT_LATCH24_REG 0x37 66 67 /* 68 * mask registers 69 */ 70 71 #define AB8500_IT_MASK1_REG 0x40 72 #define AB8500_IT_MASK2_REG 0x41 73 #define AB8500_IT_MASK3_REG 0x42 74 #define AB8500_IT_MASK4_REG 0x43 75 #define AB8500_IT_MASK5_REG 0x44 76 #define AB8500_IT_MASK6_REG 0x45 77 #define AB8500_IT_MASK7_REG 0x46 78 #define AB8500_IT_MASK8_REG 0x47 79 #define AB8500_IT_MASK9_REG 0x48 80 #define AB8500_IT_MASK10_REG 0x49 81 #define AB8500_IT_MASK11_REG 0x4A 82 #define AB8500_IT_MASK12_REG 0x4B 83 #define AB8500_IT_MASK13_REG 0x4C 84 #define AB8500_IT_MASK14_REG 0x4D 85 #define AB8500_IT_MASK15_REG 0x4E 86 #define AB8500_IT_MASK16_REG 0x4F 87 #define AB8500_IT_MASK17_REG 0x50 88 #define AB8500_IT_MASK18_REG 0x51 89 #define AB8500_IT_MASK19_REG 0x52 90 #define AB8500_IT_MASK20_REG 0x53 91 #define AB8500_IT_MASK21_REG 0x54 92 #define AB8500_IT_MASK22_REG 0x55 93 #define AB8500_IT_MASK23_REG 0x56 94 #define AB8500_IT_MASK24_REG 0x57 95 #define AB8500_IT_MASK25_REG 0x58 96 97 /* 98 * latch hierarchy registers 99 */ 100 #define AB8500_IT_LATCHHIER1_REG 0x60 101 #define AB8500_IT_LATCHHIER2_REG 0x61 102 #define AB8500_IT_LATCHHIER3_REG 0x62 103 #define AB8540_IT_LATCHHIER4_REG 0x63 104 105 #define AB8500_IT_LATCHHIER_NUM 3 106 #define AB8540_IT_LATCHHIER_NUM 4 107 108 #define AB8500_REV_REG 0x80 109 #define AB8500_IC_NAME_REG 0x82 110 #define AB8500_SWITCH_OFF_STATUS 0x00 111 112 #define AB8500_TURN_ON_STATUS 0x00 113 #define AB8505_TURN_ON_STATUS_2 0x04 114 115 #define AB8500_CH_USBCH_STAT1_REG 0x02 116 #define VBUS_DET_DBNC100 0x02 117 #define VBUS_DET_DBNC1 0x01 118 119 static DEFINE_SPINLOCK(on_stat_lock); 120 static u8 turn_on_stat_mask = 0xFF; 121 static u8 turn_on_stat_set; 122 123 #define AB9540_MODEM_CTRL2_REG 0x23 124 #define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT BIT(2) 125 126 /* 127 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt 128 * numbers are indexed into this array with (num / 8). The interupts are 129 * defined in linux/mfd/ab8500.h 130 * 131 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at 132 * offset 0. 133 */ 134 /* AB8500 support */ 135 static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = { 136 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 137 }; 138 139 /* AB9540 / AB8505 support */ 140 static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = { 141 0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23 142 }; 143 144 /* AB8540 support */ 145 static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = { 146 0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 147 23, 25, 26, 27, 28, 29, 30, 31, 148 }; 149 150 static const char ab8500_version_str[][7] = { 151 [AB8500_VERSION_AB8500] = "AB8500", 152 [AB8500_VERSION_AB8505] = "AB8505", 153 [AB8500_VERSION_AB9540] = "AB9540", 154 [AB8500_VERSION_AB8540] = "AB8540", 155 }; 156 157 static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data) 158 { 159 int ret; 160 161 ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); 162 if (ret < 0) 163 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 164 return ret; 165 } 166 167 static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask, 168 u8 data) 169 { 170 int ret; 171 172 ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 173 &mask, 1); 174 if (ret < 0) 175 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 176 return ret; 177 } 178 179 static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr) 180 { 181 int ret; 182 u8 data; 183 184 ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1); 185 if (ret < 0) { 186 dev_err(ab8500->dev, "prcmu i2c error %d\n", ret); 187 return ret; 188 } 189 return (int)data; 190 } 191 192 static int ab8500_get_chip_id(struct device *dev) 193 { 194 struct ab8500 *ab8500; 195 196 if (!dev) 197 return -EINVAL; 198 ab8500 = dev_get_drvdata(dev->parent); 199 return ab8500 ? (int)ab8500->chip_id : -EINVAL; 200 } 201 202 static int set_register_interruptible(struct ab8500 *ab8500, u8 bank, 203 u8 reg, u8 data) 204 { 205 int ret; 206 /* 207 * Put the u8 bank and u8 register together into a an u16. 208 * The bank on higher 8 bits and register in lower 8 bits. 209 */ 210 u16 addr = ((u16)bank) << 8 | reg; 211 212 dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data); 213 214 mutex_lock(&ab8500->lock); 215 216 ret = ab8500->write(ab8500, addr, data); 217 if (ret < 0) 218 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 219 addr, ret); 220 mutex_unlock(&ab8500->lock); 221 222 return ret; 223 } 224 225 static int ab8500_set_register(struct device *dev, u8 bank, 226 u8 reg, u8 value) 227 { 228 int ret; 229 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 230 231 atomic_inc(&ab8500->transfer_ongoing); 232 ret = set_register_interruptible(ab8500, bank, reg, value); 233 atomic_dec(&ab8500->transfer_ongoing); 234 return ret; 235 } 236 237 static int get_register_interruptible(struct ab8500 *ab8500, u8 bank, 238 u8 reg, u8 *value) 239 { 240 int ret; 241 u16 addr = ((u16)bank) << 8 | reg; 242 243 mutex_lock(&ab8500->lock); 244 245 ret = ab8500->read(ab8500, addr); 246 if (ret < 0) 247 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 248 addr, ret); 249 else 250 *value = ret; 251 252 mutex_unlock(&ab8500->lock); 253 dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret); 254 255 return (ret < 0) ? ret : 0; 256 } 257 258 static int ab8500_get_register(struct device *dev, u8 bank, 259 u8 reg, u8 *value) 260 { 261 int ret; 262 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 263 264 atomic_inc(&ab8500->transfer_ongoing); 265 ret = get_register_interruptible(ab8500, bank, reg, value); 266 atomic_dec(&ab8500->transfer_ongoing); 267 return ret; 268 } 269 270 static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank, 271 u8 reg, u8 bitmask, u8 bitvalues) 272 { 273 int ret; 274 u16 addr = ((u16)bank) << 8 | reg; 275 276 mutex_lock(&ab8500->lock); 277 278 if (ab8500->write_masked == NULL) { 279 u8 data; 280 281 ret = ab8500->read(ab8500, addr); 282 if (ret < 0) { 283 dev_err(ab8500->dev, "failed to read reg %#x: %d\n", 284 addr, ret); 285 goto out; 286 } 287 288 data = (u8)ret; 289 data = (~bitmask & data) | (bitmask & bitvalues); 290 291 ret = ab8500->write(ab8500, addr, data); 292 if (ret < 0) 293 dev_err(ab8500->dev, "failed to write reg %#x: %d\n", 294 addr, ret); 295 296 dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, 297 data); 298 goto out; 299 } 300 ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues); 301 if (ret < 0) 302 dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr, 303 ret); 304 out: 305 mutex_unlock(&ab8500->lock); 306 return ret; 307 } 308 309 static int ab8500_mask_and_set_register(struct device *dev, 310 u8 bank, u8 reg, u8 bitmask, u8 bitvalues) 311 { 312 int ret; 313 struct ab8500 *ab8500 = dev_get_drvdata(dev->parent); 314 315 atomic_inc(&ab8500->transfer_ongoing); 316 ret = mask_and_set_register_interruptible(ab8500, bank, reg, 317 bitmask, bitvalues); 318 atomic_dec(&ab8500->transfer_ongoing); 319 return ret; 320 } 321 322 static struct abx500_ops ab8500_ops = { 323 .get_chip_id = ab8500_get_chip_id, 324 .get_register = ab8500_get_register, 325 .set_register = ab8500_set_register, 326 .get_register_page = NULL, 327 .set_register_page = NULL, 328 .mask_and_set_register = ab8500_mask_and_set_register, 329 .event_registers_startup_state_get = NULL, 330 .startup_irq_enabled = NULL, 331 .dump_all_banks = ab8500_dump_all_banks, 332 }; 333 334 static void ab8500_irq_lock(struct irq_data *data) 335 { 336 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 337 338 mutex_lock(&ab8500->irq_lock); 339 atomic_inc(&ab8500->transfer_ongoing); 340 } 341 342 static void ab8500_irq_sync_unlock(struct irq_data *data) 343 { 344 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 345 int i; 346 347 for (i = 0; i < ab8500->mask_size; i++) { 348 u8 old = ab8500->oldmask[i]; 349 u8 new = ab8500->mask[i]; 350 int reg; 351 352 if (new == old) 353 continue; 354 355 /* 356 * Interrupt register 12 doesn't exist prior to AB8500 version 357 * 2.0 358 */ 359 if (ab8500->irq_reg_offset[i] == 11 && 360 is_ab8500_1p1_or_earlier(ab8500)) 361 continue; 362 363 if (ab8500->irq_reg_offset[i] < 0) 364 continue; 365 366 ab8500->oldmask[i] = new; 367 368 reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i]; 369 set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new); 370 } 371 atomic_dec(&ab8500->transfer_ongoing); 372 mutex_unlock(&ab8500->irq_lock); 373 } 374 375 static void ab8500_irq_mask(struct irq_data *data) 376 { 377 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 378 int offset = data->hwirq; 379 int index = offset / 8; 380 int mask = 1 << (offset % 8); 381 382 ab8500->mask[index] |= mask; 383 384 /* The AB8500 GPIOs have two interrupts each (rising & falling). */ 385 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) 386 ab8500->mask[index + 2] |= mask; 387 if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R) 388 ab8500->mask[index + 1] |= mask; 389 if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R) 390 /* Here the falling IRQ is one bit lower */ 391 ab8500->mask[index] |= (mask << 1); 392 } 393 394 static void ab8500_irq_unmask(struct irq_data *data) 395 { 396 struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data); 397 unsigned int type = irqd_get_trigger_type(data); 398 int offset = data->hwirq; 399 int index = offset / 8; 400 int mask = 1 << (offset % 8); 401 402 if (type & IRQ_TYPE_EDGE_RISING) 403 ab8500->mask[index] &= ~mask; 404 405 /* The AB8500 GPIOs have two interrupts each (rising & falling). */ 406 if (type & IRQ_TYPE_EDGE_FALLING) { 407 if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R) 408 ab8500->mask[index + 2] &= ~mask; 409 else if (offset >= AB9540_INT_GPIO50R && 410 offset <= AB9540_INT_GPIO54R) 411 ab8500->mask[index + 1] &= ~mask; 412 else if (offset == AB8540_INT_GPIO43R || 413 offset == AB8540_INT_GPIO44R) 414 /* Here the falling IRQ is one bit lower */ 415 ab8500->mask[index] &= ~(mask << 1); 416 else 417 ab8500->mask[index] &= ~mask; 418 } else { 419 /* Satisfies the case where type is not set. */ 420 ab8500->mask[index] &= ~mask; 421 } 422 } 423 424 static int ab8500_irq_set_type(struct irq_data *data, unsigned int type) 425 { 426 return 0; 427 } 428 429 static struct irq_chip ab8500_irq_chip = { 430 .name = "ab8500", 431 .irq_bus_lock = ab8500_irq_lock, 432 .irq_bus_sync_unlock = ab8500_irq_sync_unlock, 433 .irq_mask = ab8500_irq_mask, 434 .irq_disable = ab8500_irq_mask, 435 .irq_unmask = ab8500_irq_unmask, 436 .irq_set_type = ab8500_irq_set_type, 437 }; 438 439 static void update_latch_offset(u8 *offset, int i) 440 { 441 /* Fix inconsistent ITFromLatch25 bit mapping... */ 442 if (unlikely(*offset == 17)) 443 *offset = 24; 444 /* Fix inconsistent ab8540 bit mapping... */ 445 if (unlikely(*offset == 16)) 446 *offset = 25; 447 if ((i == 3) && (*offset >= 24)) 448 *offset += 2; 449 } 450 451 static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500, 452 int latch_offset, u8 latch_val) 453 { 454 int int_bit, line, i; 455 456 for (i = 0; i < ab8500->mask_size; i++) 457 if (ab8500->irq_reg_offset[i] == latch_offset) 458 break; 459 460 if (i >= ab8500->mask_size) { 461 dev_err(ab8500->dev, "Register offset 0x%2x not declared\n", 462 latch_offset); 463 return -ENXIO; 464 } 465 466 /* ignore masked out interrupts */ 467 latch_val &= ~ab8500->mask[i]; 468 469 while (latch_val) { 470 int_bit = __ffs(latch_val); 471 line = (i << 3) + int_bit; 472 latch_val &= ~(1 << int_bit); 473 474 /* 475 * This handles the falling edge hwirqs from the GPIO 476 * lines. Route them back to the line registered for the 477 * rising IRQ, as this is merely a flag for the same IRQ 478 * in linux terms. 479 */ 480 if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F) 481 line -= 16; 482 if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F) 483 line -= 8; 484 if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F) 485 line += 1; 486 487 handle_nested_irq(irq_find_mapping(ab8500->domain, line)); 488 } 489 490 return 0; 491 } 492 493 static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500, 494 int hier_offset, u8 hier_val) 495 { 496 int latch_bit, status; 497 u8 latch_offset, latch_val; 498 499 do { 500 latch_bit = __ffs(hier_val); 501 latch_offset = (hier_offset << 3) + latch_bit; 502 503 update_latch_offset(&latch_offset, hier_offset); 504 505 status = get_register_interruptible(ab8500, 506 AB8500_INTERRUPT, 507 AB8500_IT_LATCH1_REG + latch_offset, 508 &latch_val); 509 if (status < 0 || latch_val == 0) 510 goto discard; 511 512 status = ab8500_handle_hierarchical_line(ab8500, 513 latch_offset, latch_val); 514 if (status < 0) 515 return status; 516 discard: 517 hier_val &= ~(1 << latch_bit); 518 } while (hier_val); 519 520 return 0; 521 } 522 523 static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev) 524 { 525 struct ab8500 *ab8500 = dev; 526 u8 i; 527 528 dev_vdbg(ab8500->dev, "interrupt\n"); 529 530 /* Hierarchical interrupt version */ 531 for (i = 0; i < (ab8500->it_latchhier_num); i++) { 532 int status; 533 u8 hier_val; 534 535 status = get_register_interruptible(ab8500, AB8500_INTERRUPT, 536 AB8500_IT_LATCHHIER1_REG + i, &hier_val); 537 if (status < 0 || hier_val == 0) 538 continue; 539 540 status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val); 541 if (status < 0) 542 break; 543 } 544 return IRQ_HANDLED; 545 } 546 547 static int ab8500_irq_map(struct irq_domain *d, unsigned int virq, 548 irq_hw_number_t hwirq) 549 { 550 struct ab8500 *ab8500 = d->host_data; 551 552 if (!ab8500) 553 return -EINVAL; 554 555 irq_set_chip_data(virq, ab8500); 556 irq_set_chip_and_handler(virq, &ab8500_irq_chip, 557 handle_simple_irq); 558 irq_set_nested_thread(virq, 1); 559 irq_set_noprobe(virq); 560 561 return 0; 562 } 563 564 static const struct irq_domain_ops ab8500_irq_ops = { 565 .map = ab8500_irq_map, 566 .xlate = irq_domain_xlate_twocell, 567 }; 568 569 static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np) 570 { 571 int num_irqs; 572 573 if (is_ab8540(ab8500)) 574 num_irqs = AB8540_NR_IRQS; 575 else if (is_ab9540(ab8500)) 576 num_irqs = AB9540_NR_IRQS; 577 else if (is_ab8505(ab8500)) 578 num_irqs = AB8505_NR_IRQS; 579 else 580 num_irqs = AB8500_NR_IRQS; 581 582 /* If ->irq_base is zero this will give a linear mapping */ 583 ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node, 584 num_irqs, 0, 585 &ab8500_irq_ops, ab8500); 586 587 if (!ab8500->domain) { 588 dev_err(ab8500->dev, "Failed to create irqdomain\n"); 589 return -ENODEV; 590 } 591 592 return 0; 593 } 594 595 int ab8500_suspend(struct ab8500 *ab8500) 596 { 597 if (atomic_read(&ab8500->transfer_ongoing)) 598 return -EINVAL; 599 600 return 0; 601 } 602 603 static const struct mfd_cell ab8500_bm_devs[] = { 604 MFD_CELL_OF("ab8500-charger", NULL, NULL, 0, 0, 605 "stericsson,ab8500-charger"), 606 MFD_CELL_OF("ab8500-btemp", NULL, NULL, 0, 0, 607 "stericsson,ab8500-btemp"), 608 MFD_CELL_OF("ab8500-fg", NULL, NULL, 0, 0, 609 "stericsson,ab8500-fg"), 610 MFD_CELL_OF("ab8500-chargalg", NULL, NULL, 0, 0, 611 "stericsson,ab8500-chargalg"), 612 }; 613 614 static const struct mfd_cell ab8500_devs[] = { 615 MFD_CELL_OF("ab8500-sysctrl", 616 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"), 617 MFD_CELL_OF("ab8500-ext-regulator", 618 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"), 619 MFD_CELL_OF("ab8500-regulator", 620 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"), 621 MFD_CELL_OF("ab8500-clk", 622 NULL, NULL, 0, 0, "stericsson,ab8500-clk"), 623 MFD_CELL_OF("ab8500-gpadc", 624 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"), 625 MFD_CELL_OF("ab8500-rtc", 626 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"), 627 MFD_CELL_OF("ab8500-acc-det", 628 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"), 629 MFD_CELL_OF("ab8500-poweron-key", 630 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"), 631 MFD_CELL_OF("ab8500-pwm", 632 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"), 633 MFD_CELL_OF("ab8500-pwm", 634 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"), 635 MFD_CELL_OF("ab8500-pwm", 636 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"), 637 MFD_CELL_OF("ab8500-denc", 638 NULL, NULL, 0, 0, "stericsson,ab8500-denc"), 639 MFD_CELL_OF("pinctrl-ab8500", 640 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"), 641 MFD_CELL_OF("abx500-temp", 642 NULL, NULL, 0, 0, "stericsson,abx500-temp"), 643 MFD_CELL_OF("ab8500-usb", 644 NULL, NULL, 0, 0, "stericsson,ab8500-usb"), 645 MFD_CELL_OF("ab8500-codec", 646 NULL, NULL, 0, 0, "stericsson,ab8500-codec"), 647 }; 648 649 static const struct mfd_cell ab9540_devs[] = { 650 { 651 .name = "ab8500-sysctrl", 652 }, 653 { 654 .name = "ab8500-ext-regulator", 655 }, 656 { 657 .name = "ab8500-regulator", 658 }, 659 { 660 .name = "abx500-clk", 661 .of_compatible = "stericsson,abx500-clk", 662 }, 663 { 664 .name = "ab8500-gpadc", 665 .of_compatible = "stericsson,ab8500-gpadc", 666 }, 667 { 668 .name = "ab8500-rtc", 669 }, 670 { 671 .name = "ab8500-acc-det", 672 }, 673 { 674 .name = "ab8500-poweron-key", 675 }, 676 { 677 .name = "ab8500-pwm", 678 .id = 1, 679 }, 680 { 681 .name = "abx500-temp", 682 }, 683 { 684 .name = "pinctrl-ab9540", 685 .of_compatible = "stericsson,ab9540-gpio", 686 }, 687 { 688 .name = "ab9540-usb", 689 }, 690 { 691 .name = "ab9540-codec", 692 }, 693 { 694 .name = "ab-iddet", 695 }, 696 }; 697 698 /* Device list for ab8505 */ 699 static const struct mfd_cell ab8505_devs[] = { 700 { 701 .name = "ab8500-sysctrl", 702 .of_compatible = "stericsson,ab8500-sysctrl", 703 }, 704 { 705 .name = "ab8500-regulator", 706 .of_compatible = "stericsson,ab8505-regulator", 707 }, 708 { 709 .name = "abx500-clk", 710 .of_compatible = "stericsson,ab8500-clk", 711 }, 712 { 713 .name = "ab8500-gpadc", 714 .of_compatible = "stericsson,ab8500-gpadc", 715 }, 716 { 717 .name = "ab8500-rtc", 718 .of_compatible = "stericsson,ab8500-rtc", 719 }, 720 { 721 .name = "ab8500-acc-det", 722 .of_compatible = "stericsson,ab8500-acc-det", 723 }, 724 { 725 .name = "ab8500-poweron-key", 726 .of_compatible = "stericsson,ab8500-poweron-key", 727 }, 728 { 729 .name = "ab8500-pwm", 730 .of_compatible = "stericsson,ab8500-pwm", 731 .id = 1, 732 }, 733 { 734 .name = "pinctrl-ab8505", 735 .of_compatible = "stericsson,ab8505-gpio", 736 }, 737 { 738 .name = "ab8500-usb", 739 .of_compatible = "stericsson,ab8500-usb", 740 }, 741 { 742 .name = "ab8500-codec", 743 .of_compatible = "stericsson,ab8500-codec", 744 }, 745 { 746 .name = "ab-iddet", 747 }, 748 }; 749 750 static const struct mfd_cell ab8540_devs[] = { 751 { 752 .name = "ab8500-sysctrl", 753 }, 754 { 755 .name = "ab8500-ext-regulator", 756 }, 757 { 758 .name = "ab8500-regulator", 759 }, 760 { 761 .name = "abx500-clk", 762 .of_compatible = "stericsson,abx500-clk", 763 }, 764 { 765 .name = "ab8500-gpadc", 766 .of_compatible = "stericsson,ab8500-gpadc", 767 }, 768 { 769 .name = "ab8500-acc-det", 770 }, 771 { 772 .name = "ab8500-poweron-key", 773 }, 774 { 775 .name = "ab8500-pwm", 776 .id = 1, 777 }, 778 { 779 .name = "abx500-temp", 780 }, 781 { 782 .name = "pinctrl-ab8540", 783 }, 784 { 785 .name = "ab8540-usb", 786 }, 787 { 788 .name = "ab8540-codec", 789 }, 790 { 791 .name = "ab-iddet", 792 }, 793 }; 794 795 static const struct mfd_cell ab8540_cut1_devs[] = { 796 { 797 .name = "ab8500-rtc", 798 .of_compatible = "stericsson,ab8500-rtc", 799 }, 800 }; 801 802 static const struct mfd_cell ab8540_cut2_devs[] = { 803 { 804 .name = "ab8540-rtc", 805 .of_compatible = "stericsson,ab8540-rtc", 806 }, 807 }; 808 809 static ssize_t chip_id_show(struct device *dev, 810 struct device_attribute *attr, char *buf) 811 { 812 struct ab8500 *ab8500; 813 814 ab8500 = dev_get_drvdata(dev); 815 816 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); 817 } 818 819 /* 820 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 821 * 0x01 Swoff bit programming 822 * 0x02 Thermal protection activation 823 * 0x04 Vbat lower then BattOk falling threshold 824 * 0x08 Watchdog expired 825 * 0x10 Non presence of 32kHz clock 826 * 0x20 Battery level lower than power on reset threshold 827 * 0x40 Power on key 1 pressed longer than 10 seconds 828 * 0x80 DB8500 thermal shutdown 829 */ 830 static ssize_t switch_off_status_show(struct device *dev, 831 struct device_attribute *attr, char *buf) 832 { 833 int ret; 834 u8 value; 835 struct ab8500 *ab8500; 836 837 ab8500 = dev_get_drvdata(dev); 838 ret = get_register_interruptible(ab8500, AB8500_RTC, 839 AB8500_SWITCH_OFF_STATUS, &value); 840 if (ret < 0) 841 return ret; 842 return sprintf(buf, "%#x\n", value); 843 } 844 845 /* use mask and set to override the register turn_on_stat value */ 846 void ab8500_override_turn_on_stat(u8 mask, u8 set) 847 { 848 spin_lock(&on_stat_lock); 849 turn_on_stat_mask = mask; 850 turn_on_stat_set = set; 851 spin_unlock(&on_stat_lock); 852 } 853 854 /* 855 * ab8500 has turned on due to (TURN_ON_STATUS): 856 * 0x01 PORnVbat 857 * 0x02 PonKey1dbF 858 * 0x04 PonKey2dbF 859 * 0x08 RTCAlarm 860 * 0x10 MainChDet 861 * 0x20 VbusDet 862 * 0x40 UsbIDDetect 863 * 0x80 Reserved 864 */ 865 static ssize_t turn_on_status_show(struct device *dev, 866 struct device_attribute *attr, char *buf) 867 { 868 int ret; 869 u8 value; 870 struct ab8500 *ab8500; 871 872 ab8500 = dev_get_drvdata(dev); 873 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 874 AB8500_TURN_ON_STATUS, &value); 875 if (ret < 0) 876 return ret; 877 878 /* 879 * In L9540, turn_on_status register is not updated correctly if 880 * the device is rebooted with AC/USB charger connected. Due to 881 * this, the device boots android instead of entering into charge 882 * only mode. Read the AC/USB status register to detect the charger 883 * presence and update the turn on status manually. 884 */ 885 if (is_ab9540(ab8500)) { 886 spin_lock(&on_stat_lock); 887 value = (value & turn_on_stat_mask) | turn_on_stat_set; 888 spin_unlock(&on_stat_lock); 889 } 890 891 return sprintf(buf, "%#x\n", value); 892 } 893 894 static ssize_t turn_on_status_2_show(struct device *dev, 895 struct device_attribute *attr, char *buf) 896 { 897 int ret; 898 u8 value; 899 struct ab8500 *ab8500; 900 901 ab8500 = dev_get_drvdata(dev); 902 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 903 AB8505_TURN_ON_STATUS_2, &value); 904 if (ret < 0) 905 return ret; 906 return sprintf(buf, "%#x\n", (value & 0x1)); 907 } 908 909 static ssize_t dbbrstn_show(struct device *dev, 910 struct device_attribute *attr, char *buf) 911 { 912 struct ab8500 *ab8500; 913 int ret; 914 u8 value; 915 916 ab8500 = dev_get_drvdata(dev); 917 918 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2, 919 AB9540_MODEM_CTRL2_REG, &value); 920 if (ret < 0) 921 return ret; 922 923 return sprintf(buf, "%d\n", 924 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0); 925 } 926 927 static ssize_t dbbrstn_store(struct device *dev, 928 struct device_attribute *attr, const char *buf, size_t count) 929 { 930 struct ab8500 *ab8500; 931 int ret = count; 932 int err; 933 u8 bitvalues; 934 935 ab8500 = dev_get_drvdata(dev); 936 937 if (count > 0) { 938 switch (buf[0]) { 939 case '0': 940 bitvalues = 0; 941 break; 942 case '1': 943 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT; 944 break; 945 default: 946 goto exit; 947 } 948 949 err = mask_and_set_register_interruptible(ab8500, 950 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG, 951 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues); 952 if (err) 953 dev_info(ab8500->dev, 954 "Failed to set DBBRSTN %c, err %#x\n", 955 buf[0], err); 956 } 957 958 exit: 959 return ret; 960 } 961 962 static DEVICE_ATTR_RO(chip_id); 963 static DEVICE_ATTR_RO(switch_off_status); 964 static DEVICE_ATTR_RO(turn_on_status); 965 static DEVICE_ATTR_RO(turn_on_status_2); 966 static DEVICE_ATTR_RW(dbbrstn); 967 968 static struct attribute *ab8500_sysfs_entries[] = { 969 &dev_attr_chip_id.attr, 970 &dev_attr_switch_off_status.attr, 971 &dev_attr_turn_on_status.attr, 972 NULL, 973 }; 974 975 static struct attribute *ab8505_sysfs_entries[] = { 976 &dev_attr_turn_on_status_2.attr, 977 NULL, 978 }; 979 980 static struct attribute *ab9540_sysfs_entries[] = { 981 &dev_attr_chip_id.attr, 982 &dev_attr_switch_off_status.attr, 983 &dev_attr_turn_on_status.attr, 984 &dev_attr_dbbrstn.attr, 985 NULL, 986 }; 987 988 static const struct attribute_group ab8500_attr_group = { 989 .attrs = ab8500_sysfs_entries, 990 }; 991 992 static const struct attribute_group ab8505_attr_group = { 993 .attrs = ab8505_sysfs_entries, 994 }; 995 996 static const struct attribute_group ab9540_attr_group = { 997 .attrs = ab9540_sysfs_entries, 998 }; 999 1000 static int ab8500_probe(struct platform_device *pdev) 1001 { 1002 static const char * const switch_off_status[] = { 1003 "Swoff bit programming", 1004 "Thermal protection activation", 1005 "Vbat lower then BattOk falling threshold", 1006 "Watchdog expired", 1007 "Non presence of 32kHz clock", 1008 "Battery level lower than power on reset threshold", 1009 "Power on key 1 pressed longer than 10 seconds", 1010 "DB8500 thermal shutdown"}; 1011 static const char * const turn_on_status[] = { 1012 "Battery rising (Vbat)", 1013 "Power On Key 1 dbF", 1014 "Power On Key 2 dbF", 1015 "RTC Alarm", 1016 "Main Charger Detect", 1017 "Vbus Detect (USB)", 1018 "USB ID Detect", 1019 "UART Factory Mode Detect"}; 1020 const struct platform_device_id *platid = platform_get_device_id(pdev); 1021 enum ab8500_version version = AB8500_VERSION_UNDEFINED; 1022 struct device_node *np = pdev->dev.of_node; 1023 struct ab8500 *ab8500; 1024 int ret; 1025 int i; 1026 int irq; 1027 u8 value; 1028 1029 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL); 1030 if (!ab8500) 1031 return -ENOMEM; 1032 1033 ab8500->dev = &pdev->dev; 1034 1035 irq = platform_get_irq(pdev, 0); 1036 if (irq < 0) 1037 return irq; 1038 1039 ab8500->irq = irq; 1040 1041 ab8500->read = ab8500_prcmu_read; 1042 ab8500->write = ab8500_prcmu_write; 1043 ab8500->write_masked = ab8500_prcmu_write_masked; 1044 1045 mutex_init(&ab8500->lock); 1046 mutex_init(&ab8500->irq_lock); 1047 atomic_set(&ab8500->transfer_ongoing, 0); 1048 1049 platform_set_drvdata(pdev, ab8500); 1050 1051 if (platid) 1052 version = platid->driver_data; 1053 1054 if (version != AB8500_VERSION_UNDEFINED) 1055 ab8500->version = version; 1056 else { 1057 ret = get_register_interruptible(ab8500, AB8500_MISC, 1058 AB8500_IC_NAME_REG, &value); 1059 if (ret < 0) { 1060 dev_err(&pdev->dev, "could not probe HW\n"); 1061 return ret; 1062 } 1063 1064 ab8500->version = value; 1065 } 1066 1067 ret = get_register_interruptible(ab8500, AB8500_MISC, 1068 AB8500_REV_REG, &value); 1069 if (ret < 0) 1070 return ret; 1071 1072 ab8500->chip_id = value; 1073 1074 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n", 1075 ab8500_version_str[ab8500->version], 1076 ab8500->chip_id >> 4, 1077 ab8500->chip_id & 0x0F); 1078 1079 /* Configure AB8540 */ 1080 if (is_ab8540(ab8500)) { 1081 ab8500->mask_size = AB8540_NUM_IRQ_REGS; 1082 ab8500->irq_reg_offset = ab8540_irq_regoffset; 1083 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM; 1084 } /* Configure AB8500 or AB9540 IRQ */ 1085 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) { 1086 ab8500->mask_size = AB9540_NUM_IRQ_REGS; 1087 ab8500->irq_reg_offset = ab9540_irq_regoffset; 1088 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1089 } else { 1090 ab8500->mask_size = AB8500_NUM_IRQ_REGS; 1091 ab8500->irq_reg_offset = ab8500_irq_regoffset; 1092 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1093 } 1094 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1095 GFP_KERNEL); 1096 if (!ab8500->mask) 1097 return -ENOMEM; 1098 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1099 GFP_KERNEL); 1100 if (!ab8500->oldmask) 1101 return -ENOMEM; 1102 1103 /* 1104 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 1105 * 0x01 Swoff bit programming 1106 * 0x02 Thermal protection activation 1107 * 0x04 Vbat lower then BattOk falling threshold 1108 * 0x08 Watchdog expired 1109 * 0x10 Non presence of 32kHz clock 1110 * 0x20 Battery level lower than power on reset threshold 1111 * 0x40 Power on key 1 pressed longer than 10 seconds 1112 * 0x80 DB8500 thermal shutdown 1113 */ 1114 1115 ret = get_register_interruptible(ab8500, AB8500_RTC, 1116 AB8500_SWITCH_OFF_STATUS, &value); 1117 if (ret < 0) 1118 return ret; 1119 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value); 1120 1121 if (value) { 1122 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) { 1123 if (value & 1) 1124 pr_cont(" \"%s\"", switch_off_status[i]); 1125 value = value >> 1; 1126 1127 } 1128 pr_cont("\n"); 1129 } else { 1130 pr_cont(" None\n"); 1131 } 1132 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 1133 AB8500_TURN_ON_STATUS, &value); 1134 if (ret < 0) 1135 return ret; 1136 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value); 1137 1138 if (value) { 1139 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) { 1140 if (value & 1) 1141 pr_cont("\"%s\" ", turn_on_status[i]); 1142 value = value >> 1; 1143 } 1144 pr_cont("\n"); 1145 } else { 1146 pr_cont("None\n"); 1147 } 1148 1149 if (is_ab9540(ab8500)) { 1150 ret = get_register_interruptible(ab8500, AB8500_CHARGER, 1151 AB8500_CH_USBCH_STAT1_REG, &value); 1152 if (ret < 0) 1153 return ret; 1154 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100)) 1155 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, 1156 AB8500_VBUS_DET); 1157 } 1158 1159 /* Clear and mask all interrupts */ 1160 for (i = 0; i < ab8500->mask_size; i++) { 1161 /* 1162 * Interrupt register 12 doesn't exist prior to AB8500 version 1163 * 2.0 1164 */ 1165 if (ab8500->irq_reg_offset[i] == 11 && 1166 is_ab8500_1p1_or_earlier(ab8500)) 1167 continue; 1168 1169 if (ab8500->irq_reg_offset[i] < 0) 1170 continue; 1171 1172 get_register_interruptible(ab8500, AB8500_INTERRUPT, 1173 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i], 1174 &value); 1175 set_register_interruptible(ab8500, AB8500_INTERRUPT, 1176 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff); 1177 } 1178 1179 ret = abx500_register_ops(ab8500->dev, &ab8500_ops); 1180 if (ret) 1181 return ret; 1182 1183 for (i = 0; i < ab8500->mask_size; i++) 1184 ab8500->mask[i] = ab8500->oldmask[i] = 0xff; 1185 1186 ret = ab8500_irq_init(ab8500, np); 1187 if (ret) 1188 return ret; 1189 1190 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL, 1191 ab8500_hierarchical_irq, 1192 IRQF_ONESHOT | IRQF_NO_SUSPEND, 1193 "ab8500", ab8500); 1194 if (ret) 1195 return ret; 1196 1197 if (is_ab9540(ab8500)) 1198 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs, 1199 ARRAY_SIZE(ab9540_devs), NULL, 1200 0, ab8500->domain); 1201 else if (is_ab8540(ab8500)) { 1202 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs, 1203 ARRAY_SIZE(ab8540_devs), NULL, 1204 0, ab8500->domain); 1205 if (ret) 1206 return ret; 1207 1208 if (is_ab8540_1p2_or_earlier(ab8500)) 1209 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs, 1210 ARRAY_SIZE(ab8540_cut1_devs), NULL, 1211 0, ab8500->domain); 1212 else /* ab8540 >= cut2 */ 1213 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs, 1214 ARRAY_SIZE(ab8540_cut2_devs), NULL, 1215 0, ab8500->domain); 1216 } else if (is_ab8505(ab8500)) 1217 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs, 1218 ARRAY_SIZE(ab8505_devs), NULL, 1219 0, ab8500->domain); 1220 else 1221 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs, 1222 ARRAY_SIZE(ab8500_devs), NULL, 1223 0, ab8500->domain); 1224 if (ret) 1225 return ret; 1226 1227 /* Add battery management devices */ 1228 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs, 1229 ARRAY_SIZE(ab8500_bm_devs), NULL, 1230 0, ab8500->domain); 1231 if (ret) 1232 dev_err(ab8500->dev, "error adding bm devices\n"); 1233 1234 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1235 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500)) 1236 ret = sysfs_create_group(&ab8500->dev->kobj, 1237 &ab9540_attr_group); 1238 else 1239 ret = sysfs_create_group(&ab8500->dev->kobj, 1240 &ab8500_attr_group); 1241 1242 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1243 ab8500->chip_id >= AB8500_CUT2P0) 1244 ret = sysfs_create_group(&ab8500->dev->kobj, 1245 &ab8505_attr_group); 1246 1247 if (ret) 1248 dev_err(ab8500->dev, "error creating sysfs entries\n"); 1249 1250 return ret; 1251 } 1252 1253 static const struct platform_device_id ab8500_id[] = { 1254 { "ab8500-core", AB8500_VERSION_AB8500 }, 1255 { "ab8505-core", AB8500_VERSION_AB8505 }, 1256 { "ab9540-i2c", AB8500_VERSION_AB9540 }, 1257 { "ab8540-i2c", AB8500_VERSION_AB8540 }, 1258 { } 1259 }; 1260 1261 static struct platform_driver ab8500_core_driver = { 1262 .driver = { 1263 .name = "ab8500-core", 1264 .suppress_bind_attrs = true, 1265 }, 1266 .probe = ab8500_probe, 1267 .id_table = ab8500_id, 1268 }; 1269 1270 static int __init ab8500_core_init(void) 1271 { 1272 return platform_driver_register(&ab8500_core_driver); 1273 } 1274 core_initcall(ab8500_core_init); 1275