FILE
ab8500-core.c
File preview with syntax highlighting.
linux-6.19.14/drivers/mfd/ab8500-core.c
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 119static DEFINE_SPINLOCK(on_stat_lock); 120static u8 turn_on_stat_mask = 0xFF; 121static 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 */ 135static 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 */ 140static 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 */ 145static 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 150static 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 157static 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 167static 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 179static 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 192static 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 202static 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 225static 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 237static 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 258static 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 270static 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); 304out: 305 mutex_unlock(&ab8500->lock); 306 return ret; 307} 308 309static 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 322static 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 334static 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 342static 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 375static 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 394static 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 424static int ab8500_irq_set_type(struct irq_data *data, unsigned int type) 425{ 426 return 0; 427} 428 429static 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 439static 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 451static 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 493static 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; 516discard: 517 hier_val &= ~(1 << latch_bit); 518 } while (hier_val); 519 520 return 0; 521} 522 523static 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 547static 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 564static const struct irq_domain_ops ab8500_irq_ops = { 565 .map = ab8500_irq_map, 566 .xlate = irq_domain_xlate_twocell, 567}; 568 569static 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_create_simple(dev_fwnode(ab8500->dev), num_irqs, 0, 584 &ab8500_irq_ops, ab8500); 585 586 if (!ab8500->domain) { 587 dev_err(ab8500->dev, "Failed to create irqdomain\n"); 588 return -ENODEV; 589 } 590 591 return 0; 592} 593 594int ab8500_suspend(struct ab8500 *ab8500) 595{ 596 if (atomic_read(&ab8500->transfer_ongoing)) 597 return -EINVAL; 598 599 return 0; 600} 601 602static const struct mfd_cell ab8500_bm_devs[] = { 603 MFD_CELL_OF("ab8500-charger", NULL, NULL, 0, 0, 604 "stericsson,ab8500-charger"), 605 MFD_CELL_OF("ab8500-btemp", NULL, NULL, 0, 0, 606 "stericsson,ab8500-btemp"), 607 MFD_CELL_OF("ab8500-fg", NULL, NULL, 0, 0, 608 "stericsson,ab8500-fg"), 609 MFD_CELL_OF("ab8500-chargalg", NULL, NULL, 0, 0, 610 "stericsson,ab8500-chargalg"), 611}; 612 613static const struct mfd_cell ab8500_devs[] = { 614 MFD_CELL_OF("ab8500-sysctrl", 615 NULL, NULL, 0, 0, "stericsson,ab8500-sysctrl"), 616 MFD_CELL_OF("ab8500-ext-regulator", 617 NULL, NULL, 0, 0, "stericsson,ab8500-ext-regulator"), 618 MFD_CELL_OF("ab8500-regulator", 619 NULL, NULL, 0, 0, "stericsson,ab8500-regulator"), 620 MFD_CELL_OF("ab8500-clk", 621 NULL, NULL, 0, 0, "stericsson,ab8500-clk"), 622 MFD_CELL_OF("ab8500-gpadc", 623 NULL, NULL, 0, 0, "stericsson,ab8500-gpadc"), 624 MFD_CELL_OF("ab8500-rtc", 625 NULL, NULL, 0, 0, "stericsson,ab8500-rtc"), 626 MFD_CELL_OF("ab8500-acc-det", 627 NULL, NULL, 0, 0, "stericsson,ab8500-acc-det"), 628 MFD_CELL_OF("ab8500-poweron-key", 629 NULL, NULL, 0, 0, "stericsson,ab8500-poweron-key"), 630 MFD_CELL_OF("ab8500-pwm", 631 NULL, NULL, 0, 1, "stericsson,ab8500-pwm"), 632 MFD_CELL_OF("ab8500-pwm", 633 NULL, NULL, 0, 2, "stericsson,ab8500-pwm"), 634 MFD_CELL_OF("ab8500-pwm", 635 NULL, NULL, 0, 3, "stericsson,ab8500-pwm"), 636 MFD_CELL_OF("ab8500-denc", 637 NULL, NULL, 0, 0, "stericsson,ab8500-denc"), 638 MFD_CELL_OF("pinctrl-ab8500", 639 NULL, NULL, 0, 0, "stericsson,ab8500-gpio"), 640 MFD_CELL_OF("abx500-temp", 641 NULL, NULL, 0, 0, "stericsson,abx500-temp"), 642 MFD_CELL_OF("ab8500-usb", 643 NULL, NULL, 0, 0, "stericsson,ab8500-usb"), 644 MFD_CELL_OF("ab8500-codec", 645 NULL, NULL, 0, 0, "stericsson,ab8500-codec"), 646}; 647 648static const struct mfd_cell ab9540_devs[] = { 649 { 650 .name = "ab8500-sysctrl", 651 }, 652 { 653 .name = "ab8500-ext-regulator", 654 }, 655 { 656 .name = "ab8500-regulator", 657 }, 658 { 659 .name = "abx500-clk", 660 .of_compatible = "stericsson,abx500-clk", 661 }, 662 { 663 .name = "ab8500-gpadc", 664 .of_compatible = "stericsson,ab8500-gpadc", 665 }, 666 { 667 .name = "ab8500-rtc", 668 }, 669 { 670 .name = "ab8500-acc-det", 671 }, 672 { 673 .name = "ab8500-poweron-key", 674 }, 675 { 676 .name = "ab8500-pwm", 677 .id = 1, 678 }, 679 { 680 .name = "abx500-temp", 681 }, 682 { 683 .name = "pinctrl-ab9540", 684 .of_compatible = "stericsson,ab9540-gpio", 685 }, 686 { 687 .name = "ab9540-usb", 688 }, 689 { 690 .name = "ab9540-codec", 691 }, 692 { 693 .name = "ab-iddet", 694 }, 695}; 696 697/* Device list for ab8505 */ 698static const struct mfd_cell ab8505_devs[] = { 699 { 700 .name = "ab8500-sysctrl", 701 .of_compatible = "stericsson,ab8500-sysctrl", 702 }, 703 { 704 .name = "ab8500-regulator", 705 .of_compatible = "stericsson,ab8505-regulator", 706 }, 707 { 708 .name = "abx500-clk", 709 .of_compatible = "stericsson,ab8500-clk", 710 }, 711 { 712 .name = "ab8500-gpadc", 713 .of_compatible = "stericsson,ab8500-gpadc", 714 }, 715 { 716 .name = "ab8500-rtc", 717 .of_compatible = "stericsson,ab8500-rtc", 718 }, 719 { 720 .name = "ab8500-acc-det", 721 .of_compatible = "stericsson,ab8500-acc-det", 722 }, 723 { 724 .name = "ab8500-poweron-key", 725 .of_compatible = "stericsson,ab8500-poweron-key", 726 }, 727 { 728 .name = "ab8500-pwm", 729 .of_compatible = "stericsson,ab8500-pwm", 730 .id = 1, 731 }, 732 { 733 .name = "pinctrl-ab8505", 734 .of_compatible = "stericsson,ab8505-gpio", 735 }, 736 { 737 .name = "ab8500-usb", 738 .of_compatible = "stericsson,ab8500-usb", 739 }, 740 { 741 .name = "ab8500-codec", 742 .of_compatible = "stericsson,ab8500-codec", 743 }, 744 { 745 .name = "ab-iddet", 746 }, 747}; 748 749static const struct mfd_cell ab8540_devs[] = { 750 { 751 .name = "ab8500-sysctrl", 752 }, 753 { 754 .name = "ab8500-ext-regulator", 755 }, 756 { 757 .name = "ab8500-regulator", 758 }, 759 { 760 .name = "abx500-clk", 761 .of_compatible = "stericsson,abx500-clk", 762 }, 763 { 764 .name = "ab8500-gpadc", 765 .of_compatible = "stericsson,ab8500-gpadc", 766 }, 767 { 768 .name = "ab8500-acc-det", 769 }, 770 { 771 .name = "ab8500-poweron-key", 772 }, 773 { 774 .name = "ab8500-pwm", 775 .id = 1, 776 }, 777 { 778 .name = "abx500-temp", 779 }, 780 { 781 .name = "pinctrl-ab8540", 782 }, 783 { 784 .name = "ab8540-usb", 785 }, 786 { 787 .name = "ab8540-codec", 788 }, 789 { 790 .name = "ab-iddet", 791 }, 792}; 793 794static const struct mfd_cell ab8540_cut1_devs[] = { 795 { 796 .name = "ab8500-rtc", 797 .of_compatible = "stericsson,ab8500-rtc", 798 }, 799}; 800 801static const struct mfd_cell ab8540_cut2_devs[] = { 802 { 803 .name = "ab8540-rtc", 804 .of_compatible = "stericsson,ab8540-rtc", 805 }, 806}; 807 808static ssize_t chip_id_show(struct device *dev, 809 struct device_attribute *attr, char *buf) 810{ 811 struct ab8500 *ab8500; 812 813 ab8500 = dev_get_drvdata(dev); 814 815 return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL); 816} 817 818/* 819 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 820 * 0x01 Swoff bit programming 821 * 0x02 Thermal protection activation 822 * 0x04 Vbat lower then BattOk falling threshold 823 * 0x08 Watchdog expired 824 * 0x10 Non presence of 32kHz clock 825 * 0x20 Battery level lower than power on reset threshold 826 * 0x40 Power on key 1 pressed longer than 10 seconds 827 * 0x80 DB8500 thermal shutdown 828 */ 829static ssize_t switch_off_status_show(struct device *dev, 830 struct device_attribute *attr, char *buf) 831{ 832 int ret; 833 u8 value; 834 struct ab8500 *ab8500; 835 836 ab8500 = dev_get_drvdata(dev); 837 ret = get_register_interruptible(ab8500, AB8500_RTC, 838 AB8500_SWITCH_OFF_STATUS, &value); 839 if (ret < 0) 840 return ret; 841 return sprintf(buf, "%#x\n", value); 842} 843 844/* use mask and set to override the register turn_on_stat value */ 845void ab8500_override_turn_on_stat(u8 mask, u8 set) 846{ 847 spin_lock(&on_stat_lock); 848 turn_on_stat_mask = mask; 849 turn_on_stat_set = set; 850 spin_unlock(&on_stat_lock); 851} 852 853/* 854 * ab8500 has turned on due to (TURN_ON_STATUS): 855 * 0x01 PORnVbat 856 * 0x02 PonKey1dbF 857 * 0x04 PonKey2dbF 858 * 0x08 RTCAlarm 859 * 0x10 MainChDet 860 * 0x20 VbusDet 861 * 0x40 UsbIDDetect 862 * 0x80 Reserved 863 */ 864static ssize_t turn_on_status_show(struct device *dev, 865 struct device_attribute *attr, char *buf) 866{ 867 int ret; 868 u8 value; 869 struct ab8500 *ab8500; 870 871 ab8500 = dev_get_drvdata(dev); 872 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 873 AB8500_TURN_ON_STATUS, &value); 874 if (ret < 0) 875 return ret; 876 877 /* 878 * In L9540, turn_on_status register is not updated correctly if 879 * the device is rebooted with AC/USB charger connected. Due to 880 * this, the device boots android instead of entering into charge 881 * only mode. Read the AC/USB status register to detect the charger 882 * presence and update the turn on status manually. 883 */ 884 if (is_ab9540(ab8500)) { 885 spin_lock(&on_stat_lock); 886 value = (value & turn_on_stat_mask) | turn_on_stat_set; 887 spin_unlock(&on_stat_lock); 888 } 889 890 return sprintf(buf, "%#x\n", value); 891} 892 893static ssize_t turn_on_status_2_show(struct device *dev, 894 struct device_attribute *attr, char *buf) 895{ 896 int ret; 897 u8 value; 898 struct ab8500 *ab8500; 899 900 ab8500 = dev_get_drvdata(dev); 901 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 902 AB8505_TURN_ON_STATUS_2, &value); 903 if (ret < 0) 904 return ret; 905 return sprintf(buf, "%#x\n", (value & 0x1)); 906} 907 908static ssize_t dbbrstn_show(struct device *dev, 909 struct device_attribute *attr, char *buf) 910{ 911 struct ab8500 *ab8500; 912 int ret; 913 u8 value; 914 915 ab8500 = dev_get_drvdata(dev); 916 917 ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2, 918 AB9540_MODEM_CTRL2_REG, &value); 919 if (ret < 0) 920 return ret; 921 922 return sprintf(buf, "%d\n", 923 (value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0); 924} 925 926static ssize_t dbbrstn_store(struct device *dev, 927 struct device_attribute *attr, const char *buf, size_t count) 928{ 929 struct ab8500 *ab8500; 930 int ret = count; 931 int err; 932 u8 bitvalues; 933 934 ab8500 = dev_get_drvdata(dev); 935 936 if (count > 0) { 937 switch (buf[0]) { 938 case '0': 939 bitvalues = 0; 940 break; 941 case '1': 942 bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT; 943 break; 944 default: 945 goto exit; 946 } 947 948 err = mask_and_set_register_interruptible(ab8500, 949 AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG, 950 AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues); 951 if (err) 952 dev_info(ab8500->dev, 953 "Failed to set DBBRSTN %c, err %#x\n", 954 buf[0], err); 955 } 956 957exit: 958 return ret; 959} 960 961static DEVICE_ATTR_RO(chip_id); 962static DEVICE_ATTR_RO(switch_off_status); 963static DEVICE_ATTR_RO(turn_on_status); 964static DEVICE_ATTR_RO(turn_on_status_2); 965static DEVICE_ATTR_RW(dbbrstn); 966 967static struct attribute *ab8500_sysfs_entries[] = { 968 &dev_attr_chip_id.attr, 969 &dev_attr_switch_off_status.attr, 970 &dev_attr_turn_on_status.attr, 971 NULL, 972}; 973 974static struct attribute *ab8505_sysfs_entries[] = { 975 &dev_attr_turn_on_status_2.attr, 976 NULL, 977}; 978 979static struct attribute *ab9540_sysfs_entries[] = { 980 &dev_attr_chip_id.attr, 981 &dev_attr_switch_off_status.attr, 982 &dev_attr_turn_on_status.attr, 983 &dev_attr_dbbrstn.attr, 984 NULL, 985}; 986 987static const struct attribute_group ab8500_attr_group = { 988 .attrs = ab8500_sysfs_entries, 989}; 990 991static const struct attribute_group ab8505_attr_group = { 992 .attrs = ab8505_sysfs_entries, 993}; 994 995static const struct attribute_group ab9540_attr_group = { 996 .attrs = ab9540_sysfs_entries, 997}; 998 999static int ab8500_probe(struct platform_device *pdev) 1000{ 1001 static const char * const switch_off_status[] = { 1002 "Swoff bit programming", 1003 "Thermal protection activation", 1004 "Vbat lower then BattOk falling threshold", 1005 "Watchdog expired", 1006 "Non presence of 32kHz clock", 1007 "Battery level lower than power on reset threshold", 1008 "Power on key 1 pressed longer than 10 seconds", 1009 "DB8500 thermal shutdown"}; 1010 static const char * const turn_on_status[] = { 1011 "Battery rising (Vbat)", 1012 "Power On Key 1 dbF", 1013 "Power On Key 2 dbF", 1014 "RTC Alarm", 1015 "Main Charger Detect", 1016 "Vbus Detect (USB)", 1017 "USB ID Detect", 1018 "UART Factory Mode Detect"}; 1019 const struct platform_device_id *platid = platform_get_device_id(pdev); 1020 enum ab8500_version version = AB8500_VERSION_UNDEFINED; 1021 struct device_node *np = pdev->dev.of_node; 1022 struct ab8500 *ab8500; 1023 int ret; 1024 int i; 1025 int irq; 1026 u8 value; 1027 1028 ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL); 1029 if (!ab8500) 1030 return -ENOMEM; 1031 1032 ab8500->dev = &pdev->dev; 1033 1034 irq = platform_get_irq(pdev, 0); 1035 if (irq < 0) 1036 return irq; 1037 1038 ab8500->irq = irq; 1039 1040 ab8500->read = ab8500_prcmu_read; 1041 ab8500->write = ab8500_prcmu_write; 1042 ab8500->write_masked = ab8500_prcmu_write_masked; 1043 1044 mutex_init(&ab8500->lock); 1045 mutex_init(&ab8500->irq_lock); 1046 atomic_set(&ab8500->transfer_ongoing, 0); 1047 1048 platform_set_drvdata(pdev, ab8500); 1049 1050 if (platid) 1051 version = platid->driver_data; 1052 1053 if (version != AB8500_VERSION_UNDEFINED) 1054 ab8500->version = version; 1055 else { 1056 ret = get_register_interruptible(ab8500, AB8500_MISC, 1057 AB8500_IC_NAME_REG, &value); 1058 if (ret < 0) { 1059 dev_err(&pdev->dev, "could not probe HW\n"); 1060 return ret; 1061 } 1062 1063 ab8500->version = value; 1064 } 1065 1066 ret = get_register_interruptible(ab8500, AB8500_MISC, 1067 AB8500_REV_REG, &value); 1068 if (ret < 0) 1069 return ret; 1070 1071 ab8500->chip_id = value; 1072 1073 dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n", 1074 ab8500_version_str[ab8500->version], 1075 ab8500->chip_id >> 4, 1076 ab8500->chip_id & 0x0F); 1077 1078 /* Configure AB8540 */ 1079 if (is_ab8540(ab8500)) { 1080 ab8500->mask_size = AB8540_NUM_IRQ_REGS; 1081 ab8500->irq_reg_offset = ab8540_irq_regoffset; 1082 ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM; 1083 } /* Configure AB8500 or AB9540 IRQ */ 1084 else if (is_ab9540(ab8500) || is_ab8505(ab8500)) { 1085 ab8500->mask_size = AB9540_NUM_IRQ_REGS; 1086 ab8500->irq_reg_offset = ab9540_irq_regoffset; 1087 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1088 } else { 1089 ab8500->mask_size = AB8500_NUM_IRQ_REGS; 1090 ab8500->irq_reg_offset = ab8500_irq_regoffset; 1091 ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM; 1092 } 1093 ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1094 GFP_KERNEL); 1095 if (!ab8500->mask) 1096 return -ENOMEM; 1097 ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size, 1098 GFP_KERNEL); 1099 if (!ab8500->oldmask) 1100 return -ENOMEM; 1101 1102 /* 1103 * ab8500 has switched off due to (SWITCH_OFF_STATUS): 1104 * 0x01 Swoff bit programming 1105 * 0x02 Thermal protection activation 1106 * 0x04 Vbat lower then BattOk falling threshold 1107 * 0x08 Watchdog expired 1108 * 0x10 Non presence of 32kHz clock 1109 * 0x20 Battery level lower than power on reset threshold 1110 * 0x40 Power on key 1 pressed longer than 10 seconds 1111 * 0x80 DB8500 thermal shutdown 1112 */ 1113 1114 ret = get_register_interruptible(ab8500, AB8500_RTC, 1115 AB8500_SWITCH_OFF_STATUS, &value); 1116 if (ret < 0) 1117 return ret; 1118 dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value); 1119 1120 if (value) { 1121 for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) { 1122 if (value & 1) 1123 pr_cont(" \"%s\"", switch_off_status[i]); 1124 value = value >> 1; 1125 1126 } 1127 pr_cont("\n"); 1128 } else { 1129 pr_cont(" None\n"); 1130 } 1131 ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK, 1132 AB8500_TURN_ON_STATUS, &value); 1133 if (ret < 0) 1134 return ret; 1135 dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value); 1136 1137 if (value) { 1138 for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) { 1139 if (value & 1) 1140 pr_cont("\"%s\" ", turn_on_status[i]); 1141 value = value >> 1; 1142 } 1143 pr_cont("\n"); 1144 } else { 1145 pr_cont("None\n"); 1146 } 1147 1148 if (is_ab9540(ab8500)) { 1149 ret = get_register_interruptible(ab8500, AB8500_CHARGER, 1150 AB8500_CH_USBCH_STAT1_REG, &value); 1151 if (ret < 0) 1152 return ret; 1153 if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100)) 1154 ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON, 1155 AB8500_VBUS_DET); 1156 } 1157 1158 /* Clear and mask all interrupts */ 1159 for (i = 0; i < ab8500->mask_size; i++) { 1160 /* 1161 * Interrupt register 12 doesn't exist prior to AB8500 version 1162 * 2.0 1163 */ 1164 if (ab8500->irq_reg_offset[i] == 11 && 1165 is_ab8500_1p1_or_earlier(ab8500)) 1166 continue; 1167 1168 if (ab8500->irq_reg_offset[i] < 0) 1169 continue; 1170 1171 get_register_interruptible(ab8500, AB8500_INTERRUPT, 1172 AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i], 1173 &value); 1174 set_register_interruptible(ab8500, AB8500_INTERRUPT, 1175 AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff); 1176 } 1177 1178 ret = abx500_register_ops(ab8500->dev, &ab8500_ops); 1179 if (ret) 1180 return ret; 1181 1182 for (i = 0; i < ab8500->mask_size; i++) 1183 ab8500->mask[i] = ab8500->oldmask[i] = 0xff; 1184 1185 ret = ab8500_irq_init(ab8500, np); 1186 if (ret) 1187 return ret; 1188 1189 ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL, 1190 ab8500_hierarchical_irq, 1191 IRQF_ONESHOT | IRQF_NO_SUSPEND, 1192 "ab8500", ab8500); 1193 if (ret) 1194 return ret; 1195 1196 if (is_ab9540(ab8500)) 1197 ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs, 1198 ARRAY_SIZE(ab9540_devs), NULL, 1199 0, ab8500->domain); 1200 else if (is_ab8540(ab8500)) { 1201 ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs, 1202 ARRAY_SIZE(ab8540_devs), NULL, 1203 0, ab8500->domain); 1204 if (ret) 1205 return ret; 1206 1207 if (is_ab8540_1p2_or_earlier(ab8500)) 1208 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs, 1209 ARRAY_SIZE(ab8540_cut1_devs), NULL, 1210 0, ab8500->domain); 1211 else /* ab8540 >= cut2 */ 1212 ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs, 1213 ARRAY_SIZE(ab8540_cut2_devs), NULL, 1214 0, ab8500->domain); 1215 } else if (is_ab8505(ab8500)) 1216 ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs, 1217 ARRAY_SIZE(ab8505_devs), NULL, 1218 0, ab8500->domain); 1219 else 1220 ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs, 1221 ARRAY_SIZE(ab8500_devs), NULL, 1222 0, ab8500->domain); 1223 if (ret) 1224 return ret; 1225 1226 /* Add battery management devices */ 1227 ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs, 1228 ARRAY_SIZE(ab8500_bm_devs), NULL, 1229 0, ab8500->domain); 1230 if (ret) 1231 dev_err(ab8500->dev, "error adding bm devices\n"); 1232 1233 if (((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1234 ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500)) 1235 ret = sysfs_create_group(&ab8500->dev->kobj, 1236 &ab9540_attr_group); 1237 else 1238 ret = sysfs_create_group(&ab8500->dev->kobj, 1239 &ab8500_attr_group); 1240 1241 if ((is_ab8505(ab8500) || is_ab9540(ab8500)) && 1242 ab8500->chip_id >= AB8500_CUT2P0) 1243 ret = sysfs_create_group(&ab8500->dev->kobj, 1244 &ab8505_attr_group); 1245 1246 if (ret) 1247 dev_err(ab8500->dev, "error creating sysfs entries\n"); 1248 1249 return ret; 1250} 1251 1252static const struct platform_device_id ab8500_id[] = { 1253 { "ab8500-core", AB8500_VERSION_AB8500 }, 1254 { "ab8505-core", AB8500_VERSION_AB8505 }, 1255 { "ab9540-i2c", AB8500_VERSION_AB9540 }, 1256 { "ab8540-i2c", AB8500_VERSION_AB8540 }, 1257 { } 1258}; 1259 1260static struct platform_driver ab8500_core_driver = { 1261 .driver = { 1262 .name = "ab8500-core", 1263 .suppress_bind_attrs = true, 1264 }, 1265 .probe = ab8500_probe, 1266 .id_table = ab8500_id, 1267}; 1268 1269static int __init ab8500_core_init(void) 1270{ 1271 return platform_driver_register(&ab8500_core_driver); 1272} 1273core_initcall(ab8500_core_init);
~/
Read-only file preview.