1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2004 Texas Instruments, Inc. 4 * 5 * Some parts based tps65010.c: 6 * Copyright (C) 2004 Texas Instruments and 7 * Copyright (C) 2004-2005 David Brownell 8 * 9 * Some parts based on tlv320aic24.c: 10 * Copyright (C) by Kai Svahn <kai.svahn@nokia.com> 11 * 12 * Changes for interrupt handling and clean-up by 13 * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com> 14 * Cleanup and generalized support for voltage setting by 15 * Juha Yrjola 16 * Added support for controlling VCORE and regulator sleep states, 17 * Amit Kucheria <amit.kucheria@nokia.com> 18 * Copyright (C) 2005, 2006 Nokia Corporation 19 */ 20 21 #include <linux/module.h> 22 #include <linux/i2c.h> 23 #include <linux/interrupt.h> 24 #include <linux/sched.h> 25 #include <linux/mutex.h> 26 #include <linux/workqueue.h> 27 #include <linux/delay.h> 28 #include <linux/rtc.h> 29 #include <linux/bcd.h> 30 #include <linux/slab.h> 31 #include <linux/mfd/menelaus.h> 32 #include <linux/gpio.h> 33 34 #include <asm/mach/irq.h> 35 36 37 #define DRIVER_NAME "menelaus" 38 39 #define MENELAUS_I2C_ADDRESS 0x72 40 41 #define MENELAUS_REV 0x01 42 #define MENELAUS_VCORE_CTRL1 0x02 43 #define MENELAUS_VCORE_CTRL2 0x03 44 #define MENELAUS_VCORE_CTRL3 0x04 45 #define MENELAUS_VCORE_CTRL4 0x05 46 #define MENELAUS_VCORE_CTRL5 0x06 47 #define MENELAUS_DCDC_CTRL1 0x07 48 #define MENELAUS_DCDC_CTRL2 0x08 49 #define MENELAUS_DCDC_CTRL3 0x09 50 #define MENELAUS_LDO_CTRL1 0x0A 51 #define MENELAUS_LDO_CTRL2 0x0B 52 #define MENELAUS_LDO_CTRL3 0x0C 53 #define MENELAUS_LDO_CTRL4 0x0D 54 #define MENELAUS_LDO_CTRL5 0x0E 55 #define MENELAUS_LDO_CTRL6 0x0F 56 #define MENELAUS_LDO_CTRL7 0x10 57 #define MENELAUS_LDO_CTRL8 0x11 58 #define MENELAUS_SLEEP_CTRL1 0x12 59 #define MENELAUS_SLEEP_CTRL2 0x13 60 #define MENELAUS_DEVICE_OFF 0x14 61 #define MENELAUS_OSC_CTRL 0x15 62 #define MENELAUS_DETECT_CTRL 0x16 63 #define MENELAUS_INT_MASK1 0x17 64 #define MENELAUS_INT_MASK2 0x18 65 #define MENELAUS_INT_STATUS1 0x19 66 #define MENELAUS_INT_STATUS2 0x1A 67 #define MENELAUS_INT_ACK1 0x1B 68 #define MENELAUS_INT_ACK2 0x1C 69 #define MENELAUS_GPIO_CTRL 0x1D 70 #define MENELAUS_GPIO_IN 0x1E 71 #define MENELAUS_GPIO_OUT 0x1F 72 #define MENELAUS_BBSMS 0x20 73 #define MENELAUS_RTC_CTRL 0x21 74 #define MENELAUS_RTC_UPDATE 0x22 75 #define MENELAUS_RTC_SEC 0x23 76 #define MENELAUS_RTC_MIN 0x24 77 #define MENELAUS_RTC_HR 0x25 78 #define MENELAUS_RTC_DAY 0x26 79 #define MENELAUS_RTC_MON 0x27 80 #define MENELAUS_RTC_YR 0x28 81 #define MENELAUS_RTC_WKDAY 0x29 82 #define MENELAUS_RTC_AL_SEC 0x2A 83 #define MENELAUS_RTC_AL_MIN 0x2B 84 #define MENELAUS_RTC_AL_HR 0x2C 85 #define MENELAUS_RTC_AL_DAY 0x2D 86 #define MENELAUS_RTC_AL_MON 0x2E 87 #define MENELAUS_RTC_AL_YR 0x2F 88 #define MENELAUS_RTC_COMP_MSB 0x30 89 #define MENELAUS_RTC_COMP_LSB 0x31 90 #define MENELAUS_S1_PULL_EN 0x32 91 #define MENELAUS_S1_PULL_DIR 0x33 92 #define MENELAUS_S2_PULL_EN 0x34 93 #define MENELAUS_S2_PULL_DIR 0x35 94 #define MENELAUS_MCT_CTRL1 0x36 95 #define MENELAUS_MCT_CTRL2 0x37 96 #define MENELAUS_MCT_CTRL3 0x38 97 #define MENELAUS_MCT_PIN_ST 0x39 98 #define MENELAUS_DEBOUNCE1 0x3A 99 100 #define IH_MENELAUS_IRQS 12 101 #define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */ 102 #define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */ 103 #define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */ 104 #define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */ 105 #define MENELAUS_LOWBAT_IRQ 4 /* Low battery */ 106 #define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */ 107 #define MENELAUS_UVLO_IRQ 6 /* UVLO detect */ 108 #define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */ 109 #define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */ 110 #define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */ 111 #define MENELAUS_RTCERR_IRQ 10 /* RTC error */ 112 #define MENELAUS_PSHBTN_IRQ 11 /* Push button */ 113 #define MENELAUS_RESERVED12_IRQ 12 /* Reserved */ 114 #define MENELAUS_RESERVED13_IRQ 13 /* Reserved */ 115 #define MENELAUS_RESERVED14_IRQ 14 /* Reserved */ 116 #define MENELAUS_RESERVED15_IRQ 15 /* Reserved */ 117 118 /* VCORE_CTRL1 register */ 119 #define VCORE_CTRL1_BYP_COMP (1 << 5) 120 #define VCORE_CTRL1_HW_NSW (1 << 7) 121 122 /* GPIO_CTRL register */ 123 #define GPIO_CTRL_SLOTSELEN (1 << 5) 124 #define GPIO_CTRL_SLPCTLEN (1 << 6) 125 #define GPIO1_DIR_INPUT (1 << 0) 126 #define GPIO2_DIR_INPUT (1 << 1) 127 #define GPIO3_DIR_INPUT (1 << 2) 128 129 /* MCT_CTRL1 register */ 130 #define MCT_CTRL1_S1_CMD_OD (1 << 2) 131 #define MCT_CTRL1_S2_CMD_OD (1 << 3) 132 133 /* MCT_CTRL2 register */ 134 #define MCT_CTRL2_VS2_SEL_D0 (1 << 0) 135 #define MCT_CTRL2_VS2_SEL_D1 (1 << 1) 136 #define MCT_CTRL2_S1CD_BUFEN (1 << 4) 137 #define MCT_CTRL2_S2CD_BUFEN (1 << 5) 138 #define MCT_CTRL2_S1CD_DBEN (1 << 6) 139 #define MCT_CTRL2_S2CD_BEN (1 << 7) 140 141 /* MCT_CTRL3 register */ 142 #define MCT_CTRL3_SLOT1_EN (1 << 0) 143 #define MCT_CTRL3_SLOT2_EN (1 << 1) 144 #define MCT_CTRL3_S1_AUTO_EN (1 << 2) 145 #define MCT_CTRL3_S2_AUTO_EN (1 << 3) 146 147 /* MCT_PIN_ST register */ 148 #define MCT_PIN_ST_S1_CD_ST (1 << 0) 149 #define MCT_PIN_ST_S2_CD_ST (1 << 1) 150 151 static void menelaus_work(struct work_struct *_menelaus); 152 153 struct menelaus_chip { 154 struct mutex lock; 155 struct i2c_client *client; 156 struct work_struct work; 157 #ifdef CONFIG_RTC_DRV_TWL92330 158 struct rtc_device *rtc; 159 u8 rtc_control; 160 unsigned uie:1; 161 #endif 162 unsigned vcore_hw_mode:1; 163 u8 mask1, mask2; 164 void (*handlers[16])(struct menelaus_chip *); 165 void (*mmc_callback)(void *data, u8 mask); 166 void *mmc_callback_data; 167 }; 168 169 static struct menelaus_chip *the_menelaus; 170 171 static int menelaus_write_reg(int reg, u8 value) 172 { 173 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value); 174 175 if (val < 0) { 176 pr_err(DRIVER_NAME ": write error"); 177 return val; 178 } 179 180 return 0; 181 } 182 183 static int menelaus_read_reg(int reg) 184 { 185 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg); 186 187 if (val < 0) 188 pr_err(DRIVER_NAME ": read error"); 189 190 return val; 191 } 192 193 static int menelaus_enable_irq(int irq) 194 { 195 if (irq > 7) { 196 irq -= 8; 197 the_menelaus->mask2 &= ~(1 << irq); 198 return menelaus_write_reg(MENELAUS_INT_MASK2, 199 the_menelaus->mask2); 200 } else { 201 the_menelaus->mask1 &= ~(1 << irq); 202 return menelaus_write_reg(MENELAUS_INT_MASK1, 203 the_menelaus->mask1); 204 } 205 } 206 207 static int menelaus_disable_irq(int irq) 208 { 209 if (irq > 7) { 210 irq -= 8; 211 the_menelaus->mask2 |= (1 << irq); 212 return menelaus_write_reg(MENELAUS_INT_MASK2, 213 the_menelaus->mask2); 214 } else { 215 the_menelaus->mask1 |= (1 << irq); 216 return menelaus_write_reg(MENELAUS_INT_MASK1, 217 the_menelaus->mask1); 218 } 219 } 220 221 static int menelaus_ack_irq(int irq) 222 { 223 if (irq > 7) 224 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8)); 225 else 226 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq); 227 } 228 229 /* Adds a handler for an interrupt. Does not run in interrupt context */ 230 static int menelaus_add_irq_work(int irq, 231 void (*handler)(struct menelaus_chip *)) 232 { 233 int ret = 0; 234 235 mutex_lock(&the_menelaus->lock); 236 the_menelaus->handlers[irq] = handler; 237 ret = menelaus_enable_irq(irq); 238 mutex_unlock(&the_menelaus->lock); 239 240 return ret; 241 } 242 243 /* Removes handler for an interrupt */ 244 static int menelaus_remove_irq_work(int irq) 245 { 246 int ret = 0; 247 248 mutex_lock(&the_menelaus->lock); 249 ret = menelaus_disable_irq(irq); 250 the_menelaus->handlers[irq] = NULL; 251 mutex_unlock(&the_menelaus->lock); 252 253 return ret; 254 } 255 256 /* 257 * Gets scheduled when a card detect interrupt happens. Note that in some cases 258 * this line is wired to card cover switch rather than the card detect switch 259 * in each slot. In this case the cards are not seen by menelaus. 260 * FIXME: Add handling for D1 too 261 */ 262 static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw) 263 { 264 int reg; 265 unsigned char card_mask = 0; 266 267 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST); 268 if (reg < 0) 269 return; 270 271 if (!(reg & 0x1)) 272 card_mask |= MCT_PIN_ST_S1_CD_ST; 273 274 if (!(reg & 0x2)) 275 card_mask |= MCT_PIN_ST_S2_CD_ST; 276 277 if (menelaus_hw->mmc_callback) 278 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data, 279 card_mask); 280 } 281 282 /* 283 * Toggles the MMC slots between open-drain and push-pull mode. 284 */ 285 int menelaus_set_mmc_opendrain(int slot, int enable) 286 { 287 int ret, val; 288 289 if (slot != 1 && slot != 2) 290 return -EINVAL; 291 mutex_lock(&the_menelaus->lock); 292 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1); 293 if (ret < 0) { 294 mutex_unlock(&the_menelaus->lock); 295 return ret; 296 } 297 val = ret; 298 if (slot == 1) { 299 if (enable) 300 val |= MCT_CTRL1_S1_CMD_OD; 301 else 302 val &= ~MCT_CTRL1_S1_CMD_OD; 303 } else { 304 if (enable) 305 val |= MCT_CTRL1_S2_CMD_OD; 306 else 307 val &= ~MCT_CTRL1_S2_CMD_OD; 308 } 309 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val); 310 mutex_unlock(&the_menelaus->lock); 311 312 return ret; 313 } 314 EXPORT_SYMBOL(menelaus_set_mmc_opendrain); 315 316 int menelaus_set_slot_sel(int enable) 317 { 318 int ret; 319 320 mutex_lock(&the_menelaus->lock); 321 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); 322 if (ret < 0) 323 goto out; 324 ret |= GPIO2_DIR_INPUT; 325 if (enable) 326 ret |= GPIO_CTRL_SLOTSELEN; 327 else 328 ret &= ~GPIO_CTRL_SLOTSELEN; 329 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); 330 out: 331 mutex_unlock(&the_menelaus->lock); 332 return ret; 333 } 334 EXPORT_SYMBOL(menelaus_set_slot_sel); 335 336 int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en) 337 { 338 int ret, val; 339 340 if (slot != 1 && slot != 2) 341 return -EINVAL; 342 if (power >= 3) 343 return -EINVAL; 344 345 mutex_lock(&the_menelaus->lock); 346 347 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2); 348 if (ret < 0) 349 goto out; 350 val = ret; 351 if (slot == 1) { 352 if (cd_en) 353 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN; 354 else 355 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN); 356 } else { 357 if (cd_en) 358 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN; 359 else 360 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN); 361 } 362 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val); 363 if (ret < 0) 364 goto out; 365 366 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3); 367 if (ret < 0) 368 goto out; 369 val = ret; 370 if (slot == 1) { 371 if (enable) 372 val |= MCT_CTRL3_SLOT1_EN; 373 else 374 val &= ~MCT_CTRL3_SLOT1_EN; 375 } else { 376 int b; 377 378 if (enable) 379 val |= MCT_CTRL3_SLOT2_EN; 380 else 381 val &= ~MCT_CTRL3_SLOT2_EN; 382 b = menelaus_read_reg(MENELAUS_MCT_CTRL2); 383 b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1); 384 b |= power; 385 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b); 386 if (ret < 0) 387 goto out; 388 } 389 /* Disable autonomous shutdown */ 390 val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN); 391 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val); 392 out: 393 mutex_unlock(&the_menelaus->lock); 394 return ret; 395 } 396 EXPORT_SYMBOL(menelaus_set_mmc_slot); 397 398 int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask), 399 void *data) 400 { 401 int ret = 0; 402 403 the_menelaus->mmc_callback_data = data; 404 the_menelaus->mmc_callback = callback; 405 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ, 406 menelaus_mmc_cd_work); 407 if (ret < 0) 408 return ret; 409 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ, 410 menelaus_mmc_cd_work); 411 if (ret < 0) 412 return ret; 413 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ, 414 menelaus_mmc_cd_work); 415 if (ret < 0) 416 return ret; 417 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ, 418 menelaus_mmc_cd_work); 419 420 return ret; 421 } 422 EXPORT_SYMBOL(menelaus_register_mmc_callback); 423 424 void menelaus_unregister_mmc_callback(void) 425 { 426 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ); 427 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ); 428 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ); 429 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ); 430 431 the_menelaus->mmc_callback = NULL; 432 the_menelaus->mmc_callback_data = NULL; 433 } 434 EXPORT_SYMBOL(menelaus_unregister_mmc_callback); 435 436 struct menelaus_vtg { 437 const char *name; 438 u8 vtg_reg; 439 u8 vtg_shift; 440 u8 vtg_bits; 441 u8 mode_reg; 442 }; 443 444 struct menelaus_vtg_value { 445 u16 vtg; 446 u16 val; 447 }; 448 449 static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV, 450 int vtg_val, int mode) 451 { 452 int val, ret; 453 struct i2c_client *c = the_menelaus->client; 454 455 mutex_lock(&the_menelaus->lock); 456 457 ret = menelaus_read_reg(vtg->vtg_reg); 458 if (ret < 0) 459 goto out; 460 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift); 461 val |= vtg_val << vtg->vtg_shift; 462 463 dev_dbg(&c->dev, "Setting voltage '%s'" 464 "to %d mV (reg 0x%02x, val 0x%02x)\n", 465 vtg->name, mV, vtg->vtg_reg, val); 466 467 ret = menelaus_write_reg(vtg->vtg_reg, val); 468 if (ret < 0) 469 goto out; 470 ret = menelaus_write_reg(vtg->mode_reg, mode); 471 out: 472 mutex_unlock(&the_menelaus->lock); 473 if (ret == 0) { 474 /* Wait for voltage to stabilize */ 475 msleep(1); 476 } 477 return ret; 478 } 479 480 static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl, 481 int n) 482 { 483 int i; 484 485 for (i = 0; i < n; i++, tbl++) 486 if (tbl->vtg == vtg) 487 return tbl->val; 488 return -EINVAL; 489 } 490 491 /* 492 * Vcore can be programmed in two ways: 493 * SW-controlled: Required voltage is programmed into VCORE_CTRL1 494 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3 495 * and VCORE_CTRL4 496 * 497 * Call correct 'set' function accordingly 498 */ 499 500 static const struct menelaus_vtg_value vcore_values[] = { 501 { 1000, 0 }, 502 { 1025, 1 }, 503 { 1050, 2 }, 504 { 1075, 3 }, 505 { 1100, 4 }, 506 { 1125, 5 }, 507 { 1150, 6 }, 508 { 1175, 7 }, 509 { 1200, 8 }, 510 { 1225, 9 }, 511 { 1250, 10 }, 512 { 1275, 11 }, 513 { 1300, 12 }, 514 { 1325, 13 }, 515 { 1350, 14 }, 516 { 1375, 15 }, 517 { 1400, 16 }, 518 { 1425, 17 }, 519 { 1450, 18 }, 520 }; 521 522 int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV) 523 { 524 int fval, rval, val, ret; 525 struct i2c_client *c = the_menelaus->client; 526 527 rval = menelaus_get_vtg_value(roof_mV, vcore_values, 528 ARRAY_SIZE(vcore_values)); 529 if (rval < 0) 530 return -EINVAL; 531 fval = menelaus_get_vtg_value(floor_mV, vcore_values, 532 ARRAY_SIZE(vcore_values)); 533 if (fval < 0) 534 return -EINVAL; 535 536 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n", 537 floor_mV, roof_mV); 538 539 mutex_lock(&the_menelaus->lock); 540 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval); 541 if (ret < 0) 542 goto out; 543 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval); 544 if (ret < 0) 545 goto out; 546 if (!the_menelaus->vcore_hw_mode) { 547 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1); 548 /* HW mode, turn OFF byte comparator */ 549 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP); 550 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val); 551 the_menelaus->vcore_hw_mode = 1; 552 } 553 msleep(1); 554 out: 555 mutex_unlock(&the_menelaus->lock); 556 return ret; 557 } 558 559 static const struct menelaus_vtg vmem_vtg = { 560 .name = "VMEM", 561 .vtg_reg = MENELAUS_LDO_CTRL1, 562 .vtg_shift = 0, 563 .vtg_bits = 2, 564 .mode_reg = MENELAUS_LDO_CTRL3, 565 }; 566 567 static const struct menelaus_vtg_value vmem_values[] = { 568 { 1500, 0 }, 569 { 1800, 1 }, 570 { 1900, 2 }, 571 { 2500, 3 }, 572 }; 573 574 int menelaus_set_vmem(unsigned int mV) 575 { 576 int val; 577 578 if (mV == 0) 579 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0); 580 581 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values)); 582 if (val < 0) 583 return -EINVAL; 584 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02); 585 } 586 EXPORT_SYMBOL(menelaus_set_vmem); 587 588 static const struct menelaus_vtg vio_vtg = { 589 .name = "VIO", 590 .vtg_reg = MENELAUS_LDO_CTRL1, 591 .vtg_shift = 2, 592 .vtg_bits = 2, 593 .mode_reg = MENELAUS_LDO_CTRL4, 594 }; 595 596 static const struct menelaus_vtg_value vio_values[] = { 597 { 1500, 0 }, 598 { 1800, 1 }, 599 { 2500, 2 }, 600 { 2800, 3 }, 601 }; 602 603 int menelaus_set_vio(unsigned int mV) 604 { 605 int val; 606 607 if (mV == 0) 608 return menelaus_set_voltage(&vio_vtg, 0, 0, 0); 609 610 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values)); 611 if (val < 0) 612 return -EINVAL; 613 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02); 614 } 615 EXPORT_SYMBOL(menelaus_set_vio); 616 617 static const struct menelaus_vtg_value vdcdc_values[] = { 618 { 1500, 0 }, 619 { 1800, 1 }, 620 { 2000, 2 }, 621 { 2200, 3 }, 622 { 2400, 4 }, 623 { 2800, 5 }, 624 { 3000, 6 }, 625 { 3300, 7 }, 626 }; 627 628 static const struct menelaus_vtg vdcdc2_vtg = { 629 .name = "VDCDC2", 630 .vtg_reg = MENELAUS_DCDC_CTRL1, 631 .vtg_shift = 0, 632 .vtg_bits = 3, 633 .mode_reg = MENELAUS_DCDC_CTRL2, 634 }; 635 636 static const struct menelaus_vtg vdcdc3_vtg = { 637 .name = "VDCDC3", 638 .vtg_reg = MENELAUS_DCDC_CTRL1, 639 .vtg_shift = 3, 640 .vtg_bits = 3, 641 .mode_reg = MENELAUS_DCDC_CTRL3, 642 }; 643 644 int menelaus_set_vdcdc(int dcdc, unsigned int mV) 645 { 646 const struct menelaus_vtg *vtg; 647 int val; 648 649 if (dcdc != 2 && dcdc != 3) 650 return -EINVAL; 651 if (dcdc == 2) 652 vtg = &vdcdc2_vtg; 653 else 654 vtg = &vdcdc3_vtg; 655 656 if (mV == 0) 657 return menelaus_set_voltage(vtg, 0, 0, 0); 658 659 val = menelaus_get_vtg_value(mV, vdcdc_values, 660 ARRAY_SIZE(vdcdc_values)); 661 if (val < 0) 662 return -EINVAL; 663 return menelaus_set_voltage(vtg, mV, val, 0x03); 664 } 665 666 static const struct menelaus_vtg_value vmmc_values[] = { 667 { 1850, 0 }, 668 { 2800, 1 }, 669 { 3000, 2 }, 670 { 3100, 3 }, 671 }; 672 673 static const struct menelaus_vtg vmmc_vtg = { 674 .name = "VMMC", 675 .vtg_reg = MENELAUS_LDO_CTRL1, 676 .vtg_shift = 6, 677 .vtg_bits = 2, 678 .mode_reg = MENELAUS_LDO_CTRL7, 679 }; 680 681 int menelaus_set_vmmc(unsigned int mV) 682 { 683 int val; 684 685 if (mV == 0) 686 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0); 687 688 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values)); 689 if (val < 0) 690 return -EINVAL; 691 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02); 692 } 693 EXPORT_SYMBOL(menelaus_set_vmmc); 694 695 696 static const struct menelaus_vtg_value vaux_values[] = { 697 { 1500, 0 }, 698 { 1800, 1 }, 699 { 2500, 2 }, 700 { 2800, 3 }, 701 }; 702 703 static const struct menelaus_vtg vaux_vtg = { 704 .name = "VAUX", 705 .vtg_reg = MENELAUS_LDO_CTRL1, 706 .vtg_shift = 4, 707 .vtg_bits = 2, 708 .mode_reg = MENELAUS_LDO_CTRL6, 709 }; 710 711 int menelaus_set_vaux(unsigned int mV) 712 { 713 int val; 714 715 if (mV == 0) 716 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0); 717 718 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values)); 719 if (val < 0) 720 return -EINVAL; 721 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02); 722 } 723 EXPORT_SYMBOL(menelaus_set_vaux); 724 725 int menelaus_get_slot_pin_states(void) 726 { 727 return menelaus_read_reg(MENELAUS_MCT_PIN_ST); 728 } 729 EXPORT_SYMBOL(menelaus_get_slot_pin_states); 730 731 int menelaus_set_regulator_sleep(int enable, u32 val) 732 { 733 int t, ret; 734 struct i2c_client *c = the_menelaus->client; 735 736 mutex_lock(&the_menelaus->lock); 737 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val); 738 if (ret < 0) 739 goto out; 740 741 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val); 742 743 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL); 744 if (ret < 0) 745 goto out; 746 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT); 747 if (enable) 748 ret |= t; 749 else 750 ret &= ~t; 751 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret); 752 out: 753 mutex_unlock(&the_menelaus->lock); 754 return ret; 755 } 756 757 /*-----------------------------------------------------------------------*/ 758 759 /* Handles Menelaus interrupts. Does not run in interrupt context */ 760 static void menelaus_work(struct work_struct *_menelaus) 761 { 762 struct menelaus_chip *menelaus = 763 container_of(_menelaus, struct menelaus_chip, work); 764 void (*handler)(struct menelaus_chip *menelaus); 765 766 while (1) { 767 unsigned isr; 768 769 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2) 770 & ~menelaus->mask2) << 8; 771 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1) 772 & ~menelaus->mask1; 773 if (!isr) 774 break; 775 776 while (isr) { 777 int irq = fls(isr) - 1; 778 isr &= ~(1 << irq); 779 780 mutex_lock(&menelaus->lock); 781 menelaus_disable_irq(irq); 782 menelaus_ack_irq(irq); 783 handler = menelaus->handlers[irq]; 784 if (handler) 785 handler(menelaus); 786 menelaus_enable_irq(irq); 787 mutex_unlock(&menelaus->lock); 788 } 789 } 790 enable_irq(menelaus->client->irq); 791 } 792 793 /* 794 * We cannot use I2C in interrupt context, so we just schedule work. 795 */ 796 static irqreturn_t menelaus_irq(int irq, void *_menelaus) 797 { 798 struct menelaus_chip *menelaus = _menelaus; 799 800 disable_irq_nosync(irq); 801 (void)schedule_work(&menelaus->work); 802 803 return IRQ_HANDLED; 804 } 805 806 /*-----------------------------------------------------------------------*/ 807 808 /* 809 * The RTC needs to be set once, then it runs on backup battery power. 810 * It supports alarms, including system wake alarms (from some modes); 811 * and 1/second IRQs if requested. 812 */ 813 #ifdef CONFIG_RTC_DRV_TWL92330 814 815 #define RTC_CTRL_RTC_EN (1 << 0) 816 #define RTC_CTRL_AL_EN (1 << 1) 817 #define RTC_CTRL_MODE12 (1 << 2) 818 #define RTC_CTRL_EVERY_MASK (3 << 3) 819 #define RTC_CTRL_EVERY_SEC (0 << 3) 820 #define RTC_CTRL_EVERY_MIN (1 << 3) 821 #define RTC_CTRL_EVERY_HR (2 << 3) 822 #define RTC_CTRL_EVERY_DAY (3 << 3) 823 824 #define RTC_UPDATE_EVERY 0x08 825 826 #define RTC_HR_PM (1 << 7) 827 828 static void menelaus_to_time(char *regs, struct rtc_time *t) 829 { 830 t->tm_sec = bcd2bin(regs[0]); 831 t->tm_min = bcd2bin(regs[1]); 832 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { 833 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1; 834 if (regs[2] & RTC_HR_PM) 835 t->tm_hour += 12; 836 } else 837 t->tm_hour = bcd2bin(regs[2] & 0x3f); 838 t->tm_mday = bcd2bin(regs[3]); 839 t->tm_mon = bcd2bin(regs[4]) - 1; 840 t->tm_year = bcd2bin(regs[5]) + 100; 841 } 842 843 static int time_to_menelaus(struct rtc_time *t, int regnum) 844 { 845 int hour, status; 846 847 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec)); 848 if (status < 0) 849 goto fail; 850 851 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min)); 852 if (status < 0) 853 goto fail; 854 855 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) { 856 hour = t->tm_hour + 1; 857 if (hour > 12) 858 hour = RTC_HR_PM | bin2bcd(hour - 12); 859 else 860 hour = bin2bcd(hour); 861 } else 862 hour = bin2bcd(t->tm_hour); 863 status = menelaus_write_reg(regnum++, hour); 864 if (status < 0) 865 goto fail; 866 867 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday)); 868 if (status < 0) 869 goto fail; 870 871 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1)); 872 if (status < 0) 873 goto fail; 874 875 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100)); 876 if (status < 0) 877 goto fail; 878 879 return 0; 880 fail: 881 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n", 882 --regnum, status); 883 return status; 884 } 885 886 static int menelaus_read_time(struct device *dev, struct rtc_time *t) 887 { 888 struct i2c_msg msg[2]; 889 char regs[7]; 890 int status; 891 892 /* block read date and time registers */ 893 regs[0] = MENELAUS_RTC_SEC; 894 895 msg[0].addr = MENELAUS_I2C_ADDRESS; 896 msg[0].flags = 0; 897 msg[0].len = 1; 898 msg[0].buf = regs; 899 900 msg[1].addr = MENELAUS_I2C_ADDRESS; 901 msg[1].flags = I2C_M_RD; 902 msg[1].len = sizeof(regs); 903 msg[1].buf = regs; 904 905 status = i2c_transfer(the_menelaus->client->adapter, msg, 2); 906 if (status != 2) { 907 dev_err(dev, "%s error %d\n", "read", status); 908 return -EIO; 909 } 910 911 menelaus_to_time(regs, t); 912 t->tm_wday = bcd2bin(regs[6]); 913 914 return 0; 915 } 916 917 static int menelaus_set_time(struct device *dev, struct rtc_time *t) 918 { 919 int status; 920 921 /* write date and time registers */ 922 status = time_to_menelaus(t, MENELAUS_RTC_SEC); 923 if (status < 0) 924 return status; 925 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday)); 926 if (status < 0) { 927 dev_err(&the_menelaus->client->dev, "rtc write reg %02x " 928 "err %d\n", MENELAUS_RTC_WKDAY, status); 929 return status; 930 } 931 932 /* now commit the write */ 933 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY); 934 if (status < 0) 935 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n", 936 status); 937 938 return 0; 939 } 940 941 static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w) 942 { 943 struct i2c_msg msg[2]; 944 char regs[6]; 945 int status; 946 947 /* block read alarm registers */ 948 regs[0] = MENELAUS_RTC_AL_SEC; 949 950 msg[0].addr = MENELAUS_I2C_ADDRESS; 951 msg[0].flags = 0; 952 msg[0].len = 1; 953 msg[0].buf = regs; 954 955 msg[1].addr = MENELAUS_I2C_ADDRESS; 956 msg[1].flags = I2C_M_RD; 957 msg[1].len = sizeof(regs); 958 msg[1].buf = regs; 959 960 status = i2c_transfer(the_menelaus->client->adapter, msg, 2); 961 if (status != 2) { 962 dev_err(dev, "%s error %d\n", "alarm read", status); 963 return -EIO; 964 } 965 966 menelaus_to_time(regs, &w->time); 967 968 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN); 969 970 /* NOTE we *could* check if actually pending... */ 971 w->pending = 0; 972 973 return 0; 974 } 975 976 static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w) 977 { 978 int status; 979 980 if (the_menelaus->client->irq <= 0 && w->enabled) 981 return -ENODEV; 982 983 /* clear previous alarm enable */ 984 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) { 985 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 986 status = menelaus_write_reg(MENELAUS_RTC_CTRL, 987 the_menelaus->rtc_control); 988 if (status < 0) 989 return status; 990 } 991 992 /* write alarm registers */ 993 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC); 994 if (status < 0) 995 return status; 996 997 /* enable alarm if requested */ 998 if (w->enabled) { 999 the_menelaus->rtc_control |= RTC_CTRL_AL_EN; 1000 status = menelaus_write_reg(MENELAUS_RTC_CTRL, 1001 the_menelaus->rtc_control); 1002 } 1003 1004 return status; 1005 } 1006 1007 #ifdef CONFIG_RTC_INTF_DEV 1008 1009 static void menelaus_rtc_update_work(struct menelaus_chip *m) 1010 { 1011 /* report 1/sec update */ 1012 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF); 1013 } 1014 1015 static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg) 1016 { 1017 int status; 1018 1019 if (the_menelaus->client->irq <= 0) 1020 return -ENOIOCTLCMD; 1021 1022 switch (cmd) { 1023 /* alarm IRQ */ 1024 case RTC_AIE_ON: 1025 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) 1026 return 0; 1027 the_menelaus->rtc_control |= RTC_CTRL_AL_EN; 1028 break; 1029 case RTC_AIE_OFF: 1030 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN)) 1031 return 0; 1032 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 1033 break; 1034 /* 1/second "update" IRQ */ 1035 case RTC_UIE_ON: 1036 if (the_menelaus->uie) 1037 return 0; 1038 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); 1039 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ, 1040 menelaus_rtc_update_work); 1041 if (status == 0) 1042 the_menelaus->uie = 1; 1043 return status; 1044 case RTC_UIE_OFF: 1045 if (!the_menelaus->uie) 1046 return 0; 1047 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ); 1048 if (status == 0) 1049 the_menelaus->uie = 0; 1050 return status; 1051 default: 1052 return -ENOIOCTLCMD; 1053 } 1054 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); 1055 } 1056 1057 #else 1058 #define menelaus_ioctl NULL 1059 #endif 1060 1061 /* REVISIT no compensation register support ... */ 1062 1063 static const struct rtc_class_ops menelaus_rtc_ops = { 1064 .ioctl = menelaus_ioctl, 1065 .read_time = menelaus_read_time, 1066 .set_time = menelaus_set_time, 1067 .read_alarm = menelaus_read_alarm, 1068 .set_alarm = menelaus_set_alarm, 1069 }; 1070 1071 static void menelaus_rtc_alarm_work(struct menelaus_chip *m) 1072 { 1073 /* report alarm */ 1074 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF); 1075 1076 /* then disable it; alarms are oneshot */ 1077 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN; 1078 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control); 1079 } 1080 1081 static inline void menelaus_rtc_init(struct menelaus_chip *m) 1082 { 1083 int alarm = (m->client->irq > 0); 1084 int err; 1085 1086 /* assume 32KDETEN pin is pulled high */ 1087 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) { 1088 dev_dbg(&m->client->dev, "no 32k oscillator\n"); 1089 return; 1090 } 1091 1092 m->rtc = devm_rtc_allocate_device(&m->client->dev); 1093 if (IS_ERR(m->rtc)) 1094 return; 1095 1096 m->rtc->ops = &menelaus_rtc_ops; 1097 1098 /* support RTC alarm; it can issue wakeups */ 1099 if (alarm) { 1100 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ, 1101 menelaus_rtc_alarm_work) < 0) { 1102 dev_err(&m->client->dev, "can't handle RTC alarm\n"); 1103 return; 1104 } 1105 device_init_wakeup(&m->client->dev, 1); 1106 } 1107 1108 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */ 1109 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL); 1110 if (!(m->rtc_control & RTC_CTRL_RTC_EN) 1111 || (m->rtc_control & RTC_CTRL_AL_EN) 1112 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) { 1113 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) { 1114 dev_warn(&m->client->dev, "rtc clock needs setting\n"); 1115 m->rtc_control |= RTC_CTRL_RTC_EN; 1116 } 1117 m->rtc_control &= ~RTC_CTRL_EVERY_MASK; 1118 m->rtc_control &= ~RTC_CTRL_AL_EN; 1119 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control); 1120 } 1121 1122 err = devm_rtc_register_device(m->rtc); 1123 if (err) { 1124 if (alarm) { 1125 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ); 1126 device_init_wakeup(&m->client->dev, 0); 1127 } 1128 the_menelaus->rtc = NULL; 1129 } 1130 } 1131 1132 #else 1133 1134 static inline void menelaus_rtc_init(struct menelaus_chip *m) 1135 { 1136 /* nothing */ 1137 } 1138 1139 #endif 1140 1141 /*-----------------------------------------------------------------------*/ 1142 1143 static struct i2c_driver menelaus_i2c_driver; 1144 1145 static int menelaus_probe(struct i2c_client *client) 1146 { 1147 struct menelaus_chip *menelaus; 1148 int rev = 0; 1149 int err = 0; 1150 struct menelaus_platform_data *menelaus_pdata = 1151 dev_get_platdata(&client->dev); 1152 1153 if (the_menelaus) { 1154 dev_dbg(&client->dev, "only one %s for now\n", 1155 DRIVER_NAME); 1156 return -ENODEV; 1157 } 1158 1159 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL); 1160 if (!menelaus) 1161 return -ENOMEM; 1162 1163 i2c_set_clientdata(client, menelaus); 1164 1165 the_menelaus = menelaus; 1166 menelaus->client = client; 1167 1168 /* If a true probe check the device */ 1169 rev = menelaus_read_reg(MENELAUS_REV); 1170 if (rev < 0) { 1171 pr_err(DRIVER_NAME ": device not found"); 1172 return -ENODEV; 1173 } 1174 1175 /* Ack and disable all Menelaus interrupts */ 1176 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff); 1177 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff); 1178 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff); 1179 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff); 1180 menelaus->mask1 = 0xff; 1181 menelaus->mask2 = 0xff; 1182 1183 /* Set output buffer strengths */ 1184 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73); 1185 1186 if (client->irq > 0) { 1187 err = request_irq(client->irq, menelaus_irq, 0, 1188 DRIVER_NAME, menelaus); 1189 if (err) { 1190 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", 1191 client->irq, err); 1192 return err; 1193 } 1194 } 1195 1196 mutex_init(&menelaus->lock); 1197 INIT_WORK(&menelaus->work, menelaus_work); 1198 1199 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f); 1200 1201 err = menelaus_read_reg(MENELAUS_VCORE_CTRL1); 1202 if (err < 0) 1203 goto fail; 1204 if (err & VCORE_CTRL1_HW_NSW) 1205 menelaus->vcore_hw_mode = 1; 1206 else 1207 menelaus->vcore_hw_mode = 0; 1208 1209 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) { 1210 err = menelaus_pdata->late_init(&client->dev); 1211 if (err < 0) 1212 goto fail; 1213 } 1214 1215 menelaus_rtc_init(menelaus); 1216 1217 return 0; 1218 fail: 1219 free_irq(client->irq, menelaus); 1220 flush_work(&menelaus->work); 1221 return err; 1222 } 1223 1224 static void menelaus_remove(struct i2c_client *client) 1225 { 1226 struct menelaus_chip *menelaus = i2c_get_clientdata(client); 1227 1228 free_irq(client->irq, menelaus); 1229 flush_work(&menelaus->work); 1230 the_menelaus = NULL; 1231 } 1232 1233 static const struct i2c_device_id menelaus_id[] = { 1234 { "menelaus", 0 }, 1235 { } 1236 }; 1237 MODULE_DEVICE_TABLE(i2c, menelaus_id); 1238 1239 static struct i2c_driver menelaus_i2c_driver = { 1240 .driver = { 1241 .name = DRIVER_NAME, 1242 }, 1243 .probe_new = menelaus_probe, 1244 .remove = menelaus_remove, 1245 .id_table = menelaus_id, 1246 }; 1247 1248 module_i2c_driver(menelaus_i2c_driver); 1249 1250 MODULE_AUTHOR("Texas Instruments, Inc. (and others)"); 1251 MODULE_DESCRIPTION("I2C interface for Menelaus."); 1252 MODULE_LICENSE("GPL"); 1253