1252 lines · c
1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2004 Texas Instruments, Inc.4 *5 * Some parts based tps65010.c:6 * Copyright (C) 2004 Texas Instruments and7 * Copyright (C) 2004-2005 David Brownell8 *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 by13 * Tony Lindgren <tony@atomide.com> and Imre Deak <imre.deak@nokia.com>14 * Cleanup and generalized support for voltage setting by15 * Juha Yrjola16 * Added support for controlling VCORE and regulator sleep states,17 * Amit Kucheria <amit.kucheria@nokia.com>18 * Copyright (C) 2005, 2006 Nokia Corporation19 */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 33#include <asm/mach/irq.h>34 35 36#define DRIVER_NAME "menelaus"37 38#define MENELAUS_I2C_ADDRESS 0x7239 40#define MENELAUS_REV 0x0141#define MENELAUS_VCORE_CTRL1 0x0242#define MENELAUS_VCORE_CTRL2 0x0343#define MENELAUS_VCORE_CTRL3 0x0444#define MENELAUS_VCORE_CTRL4 0x0545#define MENELAUS_VCORE_CTRL5 0x0646#define MENELAUS_DCDC_CTRL1 0x0747#define MENELAUS_DCDC_CTRL2 0x0848#define MENELAUS_DCDC_CTRL3 0x0949#define MENELAUS_LDO_CTRL1 0x0A50#define MENELAUS_LDO_CTRL2 0x0B51#define MENELAUS_LDO_CTRL3 0x0C52#define MENELAUS_LDO_CTRL4 0x0D53#define MENELAUS_LDO_CTRL5 0x0E54#define MENELAUS_LDO_CTRL6 0x0F55#define MENELAUS_LDO_CTRL7 0x1056#define MENELAUS_LDO_CTRL8 0x1157#define MENELAUS_SLEEP_CTRL1 0x1258#define MENELAUS_SLEEP_CTRL2 0x1359#define MENELAUS_DEVICE_OFF 0x1460#define MENELAUS_OSC_CTRL 0x1561#define MENELAUS_DETECT_CTRL 0x1662#define MENELAUS_INT_MASK1 0x1763#define MENELAUS_INT_MASK2 0x1864#define MENELAUS_INT_STATUS1 0x1965#define MENELAUS_INT_STATUS2 0x1A66#define MENELAUS_INT_ACK1 0x1B67#define MENELAUS_INT_ACK2 0x1C68#define MENELAUS_GPIO_CTRL 0x1D69#define MENELAUS_GPIO_IN 0x1E70#define MENELAUS_GPIO_OUT 0x1F71#define MENELAUS_BBSMS 0x2072#define MENELAUS_RTC_CTRL 0x2173#define MENELAUS_RTC_UPDATE 0x2274#define MENELAUS_RTC_SEC 0x2375#define MENELAUS_RTC_MIN 0x2476#define MENELAUS_RTC_HR 0x2577#define MENELAUS_RTC_DAY 0x2678#define MENELAUS_RTC_MON 0x2779#define MENELAUS_RTC_YR 0x2880#define MENELAUS_RTC_WKDAY 0x2981#define MENELAUS_RTC_AL_SEC 0x2A82#define MENELAUS_RTC_AL_MIN 0x2B83#define MENELAUS_RTC_AL_HR 0x2C84#define MENELAUS_RTC_AL_DAY 0x2D85#define MENELAUS_RTC_AL_MON 0x2E86#define MENELAUS_RTC_AL_YR 0x2F87#define MENELAUS_RTC_COMP_MSB 0x3088#define MENELAUS_RTC_COMP_LSB 0x3189#define MENELAUS_S1_PULL_EN 0x3290#define MENELAUS_S1_PULL_DIR 0x3391#define MENELAUS_S2_PULL_EN 0x3492#define MENELAUS_S2_PULL_DIR 0x3593#define MENELAUS_MCT_CTRL1 0x3694#define MENELAUS_MCT_CTRL2 0x3795#define MENELAUS_MCT_CTRL3 0x3896#define MENELAUS_MCT_PIN_ST 0x3997#define MENELAUS_DEBOUNCE1 0x3A98 99#define IH_MENELAUS_IRQS 12100#define MENELAUS_MMC_S1CD_IRQ 0 /* MMC slot 1 card change */101#define MENELAUS_MMC_S2CD_IRQ 1 /* MMC slot 2 card change */102#define MENELAUS_MMC_S1D1_IRQ 2 /* MMC DAT1 low in slot 1 */103#define MENELAUS_MMC_S2D1_IRQ 3 /* MMC DAT1 low in slot 2 */104#define MENELAUS_LOWBAT_IRQ 4 /* Low battery */105#define MENELAUS_HOTDIE_IRQ 5 /* Hot die detect */106#define MENELAUS_UVLO_IRQ 6 /* UVLO detect */107#define MENELAUS_TSHUT_IRQ 7 /* Thermal shutdown */108#define MENELAUS_RTCTMR_IRQ 8 /* RTC timer */109#define MENELAUS_RTCALM_IRQ 9 /* RTC alarm */110#define MENELAUS_RTCERR_IRQ 10 /* RTC error */111#define MENELAUS_PSHBTN_IRQ 11 /* Push button */112#define MENELAUS_RESERVED12_IRQ 12 /* Reserved */113#define MENELAUS_RESERVED13_IRQ 13 /* Reserved */114#define MENELAUS_RESERVED14_IRQ 14 /* Reserved */115#define MENELAUS_RESERVED15_IRQ 15 /* Reserved */116 117/* VCORE_CTRL1 register */118#define VCORE_CTRL1_BYP_COMP (1 << 5)119#define VCORE_CTRL1_HW_NSW (1 << 7)120 121/* GPIO_CTRL register */122#define GPIO_CTRL_SLOTSELEN (1 << 5)123#define GPIO_CTRL_SLPCTLEN (1 << 6)124#define GPIO1_DIR_INPUT (1 << 0)125#define GPIO2_DIR_INPUT (1 << 1)126#define GPIO3_DIR_INPUT (1 << 2)127 128/* MCT_CTRL1 register */129#define MCT_CTRL1_S1_CMD_OD (1 << 2)130#define MCT_CTRL1_S2_CMD_OD (1 << 3)131 132/* MCT_CTRL2 register */133#define MCT_CTRL2_VS2_SEL_D0 (1 << 0)134#define MCT_CTRL2_VS2_SEL_D1 (1 << 1)135#define MCT_CTRL2_S1CD_BUFEN (1 << 4)136#define MCT_CTRL2_S2CD_BUFEN (1 << 5)137#define MCT_CTRL2_S1CD_DBEN (1 << 6)138#define MCT_CTRL2_S2CD_BEN (1 << 7)139 140/* MCT_CTRL3 register */141#define MCT_CTRL3_SLOT1_EN (1 << 0)142#define MCT_CTRL3_SLOT2_EN (1 << 1)143#define MCT_CTRL3_S1_AUTO_EN (1 << 2)144#define MCT_CTRL3_S2_AUTO_EN (1 << 3)145 146/* MCT_PIN_ST register */147#define MCT_PIN_ST_S1_CD_ST (1 << 0)148#define MCT_PIN_ST_S2_CD_ST (1 << 1)149 150static void menelaus_work(struct work_struct *_menelaus);151 152struct menelaus_chip {153 struct mutex lock;154 struct i2c_client *client;155 struct work_struct work;156#ifdef CONFIG_RTC_DRV_TWL92330157 struct rtc_device *rtc;158 u8 rtc_control;159 unsigned uie:1;160#endif161 unsigned vcore_hw_mode:1;162 u8 mask1, mask2;163 void (*handlers[16])(struct menelaus_chip *);164 void (*mmc_callback)(void *data, u8 mask);165 void *mmc_callback_data;166};167 168static struct menelaus_chip *the_menelaus;169 170static int menelaus_write_reg(int reg, u8 value)171{172 int val = i2c_smbus_write_byte_data(the_menelaus->client, reg, value);173 174 if (val < 0) {175 pr_err(DRIVER_NAME ": write error");176 return val;177 }178 179 return 0;180}181 182static int menelaus_read_reg(int reg)183{184 int val = i2c_smbus_read_byte_data(the_menelaus->client, reg);185 186 if (val < 0)187 pr_err(DRIVER_NAME ": read error");188 189 return val;190}191 192static int menelaus_enable_irq(int irq)193{194 if (irq > 7) {195 irq -= 8;196 the_menelaus->mask2 &= ~(1 << irq);197 return menelaus_write_reg(MENELAUS_INT_MASK2,198 the_menelaus->mask2);199 } else {200 the_menelaus->mask1 &= ~(1 << irq);201 return menelaus_write_reg(MENELAUS_INT_MASK1,202 the_menelaus->mask1);203 }204}205 206static int menelaus_disable_irq(int irq)207{208 if (irq > 7) {209 irq -= 8;210 the_menelaus->mask2 |= (1 << irq);211 return menelaus_write_reg(MENELAUS_INT_MASK2,212 the_menelaus->mask2);213 } else {214 the_menelaus->mask1 |= (1 << irq);215 return menelaus_write_reg(MENELAUS_INT_MASK1,216 the_menelaus->mask1);217 }218}219 220static int menelaus_ack_irq(int irq)221{222 if (irq > 7)223 return menelaus_write_reg(MENELAUS_INT_ACK2, 1 << (irq - 8));224 else225 return menelaus_write_reg(MENELAUS_INT_ACK1, 1 << irq);226}227 228/* Adds a handler for an interrupt. Does not run in interrupt context */229static int menelaus_add_irq_work(int irq,230 void (*handler)(struct menelaus_chip *))231{232 int ret = 0;233 234 mutex_lock(&the_menelaus->lock);235 the_menelaus->handlers[irq] = handler;236 ret = menelaus_enable_irq(irq);237 mutex_unlock(&the_menelaus->lock);238 239 return ret;240}241 242/* Removes handler for an interrupt */243static int menelaus_remove_irq_work(int irq)244{245 int ret = 0;246 247 mutex_lock(&the_menelaus->lock);248 ret = menelaus_disable_irq(irq);249 the_menelaus->handlers[irq] = NULL;250 mutex_unlock(&the_menelaus->lock);251 252 return ret;253}254 255/*256 * Gets scheduled when a card detect interrupt happens. Note that in some cases257 * this line is wired to card cover switch rather than the card detect switch258 * in each slot. In this case the cards are not seen by menelaus.259 * FIXME: Add handling for D1 too260 */261static void menelaus_mmc_cd_work(struct menelaus_chip *menelaus_hw)262{263 int reg;264 unsigned char card_mask = 0;265 266 reg = menelaus_read_reg(MENELAUS_MCT_PIN_ST);267 if (reg < 0)268 return;269 270 if (!(reg & 0x1))271 card_mask |= MCT_PIN_ST_S1_CD_ST;272 273 if (!(reg & 0x2))274 card_mask |= MCT_PIN_ST_S2_CD_ST;275 276 if (menelaus_hw->mmc_callback)277 menelaus_hw->mmc_callback(menelaus_hw->mmc_callback_data,278 card_mask);279}280 281/*282 * Toggles the MMC slots between open-drain and push-pull mode.283 */284int menelaus_set_mmc_opendrain(int slot, int enable)285{286 int ret, val;287 288 if (slot != 1 && slot != 2)289 return -EINVAL;290 mutex_lock(&the_menelaus->lock);291 ret = menelaus_read_reg(MENELAUS_MCT_CTRL1);292 if (ret < 0) {293 mutex_unlock(&the_menelaus->lock);294 return ret;295 }296 val = ret;297 if (slot == 1) {298 if (enable)299 val |= MCT_CTRL1_S1_CMD_OD;300 else301 val &= ~MCT_CTRL1_S1_CMD_OD;302 } else {303 if (enable)304 val |= MCT_CTRL1_S2_CMD_OD;305 else306 val &= ~MCT_CTRL1_S2_CMD_OD;307 }308 ret = menelaus_write_reg(MENELAUS_MCT_CTRL1, val);309 mutex_unlock(&the_menelaus->lock);310 311 return ret;312}313EXPORT_SYMBOL(menelaus_set_mmc_opendrain);314 315int menelaus_set_slot_sel(int enable)316{317 int ret;318 319 mutex_lock(&the_menelaus->lock);320 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);321 if (ret < 0)322 goto out;323 ret |= GPIO2_DIR_INPUT;324 if (enable)325 ret |= GPIO_CTRL_SLOTSELEN;326 else327 ret &= ~GPIO_CTRL_SLOTSELEN;328 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);329out:330 mutex_unlock(&the_menelaus->lock);331 return ret;332}333EXPORT_SYMBOL(menelaus_set_slot_sel);334 335int menelaus_set_mmc_slot(int slot, int enable, int power, int cd_en)336{337 int ret, val;338 339 if (slot != 1 && slot != 2)340 return -EINVAL;341 if (power >= 3)342 return -EINVAL;343 344 mutex_lock(&the_menelaus->lock);345 346 ret = menelaus_read_reg(MENELAUS_MCT_CTRL2);347 if (ret < 0)348 goto out;349 val = ret;350 if (slot == 1) {351 if (cd_en)352 val |= MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN;353 else354 val &= ~(MCT_CTRL2_S1CD_BUFEN | MCT_CTRL2_S1CD_DBEN);355 } else {356 if (cd_en)357 val |= MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN;358 else359 val &= ~(MCT_CTRL2_S2CD_BUFEN | MCT_CTRL2_S2CD_BEN);360 }361 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, val);362 if (ret < 0)363 goto out;364 365 ret = menelaus_read_reg(MENELAUS_MCT_CTRL3);366 if (ret < 0)367 goto out;368 val = ret;369 if (slot == 1) {370 if (enable)371 val |= MCT_CTRL3_SLOT1_EN;372 else373 val &= ~MCT_CTRL3_SLOT1_EN;374 } else {375 int b;376 377 if (enable)378 val |= MCT_CTRL3_SLOT2_EN;379 else380 val &= ~MCT_CTRL3_SLOT2_EN;381 b = menelaus_read_reg(MENELAUS_MCT_CTRL2);382 b &= ~(MCT_CTRL2_VS2_SEL_D0 | MCT_CTRL2_VS2_SEL_D1);383 b |= power;384 ret = menelaus_write_reg(MENELAUS_MCT_CTRL2, b);385 if (ret < 0)386 goto out;387 }388 /* Disable autonomous shutdown */389 val &= ~(MCT_CTRL3_S1_AUTO_EN | MCT_CTRL3_S2_AUTO_EN);390 ret = menelaus_write_reg(MENELAUS_MCT_CTRL3, val);391out:392 mutex_unlock(&the_menelaus->lock);393 return ret;394}395EXPORT_SYMBOL(menelaus_set_mmc_slot);396 397int menelaus_register_mmc_callback(void (*callback)(void *data, u8 card_mask),398 void *data)399{400 int ret = 0;401 402 the_menelaus->mmc_callback_data = data;403 the_menelaus->mmc_callback = callback;404 ret = menelaus_add_irq_work(MENELAUS_MMC_S1CD_IRQ,405 menelaus_mmc_cd_work);406 if (ret < 0)407 return ret;408 ret = menelaus_add_irq_work(MENELAUS_MMC_S2CD_IRQ,409 menelaus_mmc_cd_work);410 if (ret < 0)411 return ret;412 ret = menelaus_add_irq_work(MENELAUS_MMC_S1D1_IRQ,413 menelaus_mmc_cd_work);414 if (ret < 0)415 return ret;416 ret = menelaus_add_irq_work(MENELAUS_MMC_S2D1_IRQ,417 menelaus_mmc_cd_work);418 419 return ret;420}421EXPORT_SYMBOL(menelaus_register_mmc_callback);422 423void menelaus_unregister_mmc_callback(void)424{425 menelaus_remove_irq_work(MENELAUS_MMC_S1CD_IRQ);426 menelaus_remove_irq_work(MENELAUS_MMC_S2CD_IRQ);427 menelaus_remove_irq_work(MENELAUS_MMC_S1D1_IRQ);428 menelaus_remove_irq_work(MENELAUS_MMC_S2D1_IRQ);429 430 the_menelaus->mmc_callback = NULL;431 the_menelaus->mmc_callback_data = NULL;432}433EXPORT_SYMBOL(menelaus_unregister_mmc_callback);434 435struct menelaus_vtg {436 const char *name;437 u8 vtg_reg;438 u8 vtg_shift;439 u8 vtg_bits;440 u8 mode_reg;441};442 443struct menelaus_vtg_value {444 u16 vtg;445 u16 val;446};447 448static int menelaus_set_voltage(const struct menelaus_vtg *vtg, int mV,449 int vtg_val, int mode)450{451 int val, ret;452 struct i2c_client *c = the_menelaus->client;453 454 mutex_lock(&the_menelaus->lock);455 456 ret = menelaus_read_reg(vtg->vtg_reg);457 if (ret < 0)458 goto out;459 val = ret & ~(((1 << vtg->vtg_bits) - 1) << vtg->vtg_shift);460 val |= vtg_val << vtg->vtg_shift;461 462 dev_dbg(&c->dev, "Setting voltage '%s'"463 "to %d mV (reg 0x%02x, val 0x%02x)\n",464 vtg->name, mV, vtg->vtg_reg, val);465 466 ret = menelaus_write_reg(vtg->vtg_reg, val);467 if (ret < 0)468 goto out;469 ret = menelaus_write_reg(vtg->mode_reg, mode);470out:471 mutex_unlock(&the_menelaus->lock);472 if (ret == 0) {473 /* Wait for voltage to stabilize */474 msleep(1);475 }476 return ret;477}478 479static int menelaus_get_vtg_value(int vtg, const struct menelaus_vtg_value *tbl,480 int n)481{482 int i;483 484 for (i = 0; i < n; i++, tbl++)485 if (tbl->vtg == vtg)486 return tbl->val;487 return -EINVAL;488}489 490/*491 * Vcore can be programmed in two ways:492 * SW-controlled: Required voltage is programmed into VCORE_CTRL1493 * HW-controlled: Required range (roof-floor) is programmed into VCORE_CTRL3494 * and VCORE_CTRL4495 *496 * Call correct 'set' function accordingly497 */498 499static const struct menelaus_vtg_value vcore_values[] = {500 { 1000, 0 },501 { 1025, 1 },502 { 1050, 2 },503 { 1075, 3 },504 { 1100, 4 },505 { 1125, 5 },506 { 1150, 6 },507 { 1175, 7 },508 { 1200, 8 },509 { 1225, 9 },510 { 1250, 10 },511 { 1275, 11 },512 { 1300, 12 },513 { 1325, 13 },514 { 1350, 14 },515 { 1375, 15 },516 { 1400, 16 },517 { 1425, 17 },518 { 1450, 18 },519};520 521int menelaus_set_vcore_hw(unsigned int roof_mV, unsigned int floor_mV)522{523 int fval, rval, val, ret;524 struct i2c_client *c = the_menelaus->client;525 526 rval = menelaus_get_vtg_value(roof_mV, vcore_values,527 ARRAY_SIZE(vcore_values));528 if (rval < 0)529 return -EINVAL;530 fval = menelaus_get_vtg_value(floor_mV, vcore_values,531 ARRAY_SIZE(vcore_values));532 if (fval < 0)533 return -EINVAL;534 535 dev_dbg(&c->dev, "Setting VCORE FLOOR to %d mV and ROOF to %d mV\n",536 floor_mV, roof_mV);537 538 mutex_lock(&the_menelaus->lock);539 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL3, fval);540 if (ret < 0)541 goto out;542 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL4, rval);543 if (ret < 0)544 goto out;545 if (!the_menelaus->vcore_hw_mode) {546 val = menelaus_read_reg(MENELAUS_VCORE_CTRL1);547 /* HW mode, turn OFF byte comparator */548 val |= (VCORE_CTRL1_HW_NSW | VCORE_CTRL1_BYP_COMP);549 ret = menelaus_write_reg(MENELAUS_VCORE_CTRL1, val);550 the_menelaus->vcore_hw_mode = 1;551 }552 msleep(1);553out:554 mutex_unlock(&the_menelaus->lock);555 return ret;556}557 558static const struct menelaus_vtg vmem_vtg = {559 .name = "VMEM",560 .vtg_reg = MENELAUS_LDO_CTRL1,561 .vtg_shift = 0,562 .vtg_bits = 2,563 .mode_reg = MENELAUS_LDO_CTRL3,564};565 566static const struct menelaus_vtg_value vmem_values[] = {567 { 1500, 0 },568 { 1800, 1 },569 { 1900, 2 },570 { 2500, 3 },571};572 573int menelaus_set_vmem(unsigned int mV)574{575 int val;576 577 if (mV == 0)578 return menelaus_set_voltage(&vmem_vtg, 0, 0, 0);579 580 val = menelaus_get_vtg_value(mV, vmem_values, ARRAY_SIZE(vmem_values));581 if (val < 0)582 return -EINVAL;583 return menelaus_set_voltage(&vmem_vtg, mV, val, 0x02);584}585EXPORT_SYMBOL(menelaus_set_vmem);586 587static const struct menelaus_vtg vio_vtg = {588 .name = "VIO",589 .vtg_reg = MENELAUS_LDO_CTRL1,590 .vtg_shift = 2,591 .vtg_bits = 2,592 .mode_reg = MENELAUS_LDO_CTRL4,593};594 595static const struct menelaus_vtg_value vio_values[] = {596 { 1500, 0 },597 { 1800, 1 },598 { 2500, 2 },599 { 2800, 3 },600};601 602int menelaus_set_vio(unsigned int mV)603{604 int val;605 606 if (mV == 0)607 return menelaus_set_voltage(&vio_vtg, 0, 0, 0);608 609 val = menelaus_get_vtg_value(mV, vio_values, ARRAY_SIZE(vio_values));610 if (val < 0)611 return -EINVAL;612 return menelaus_set_voltage(&vio_vtg, mV, val, 0x02);613}614EXPORT_SYMBOL(menelaus_set_vio);615 616static const struct menelaus_vtg_value vdcdc_values[] = {617 { 1500, 0 },618 { 1800, 1 },619 { 2000, 2 },620 { 2200, 3 },621 { 2400, 4 },622 { 2800, 5 },623 { 3000, 6 },624 { 3300, 7 },625};626 627static const struct menelaus_vtg vdcdc2_vtg = {628 .name = "VDCDC2",629 .vtg_reg = MENELAUS_DCDC_CTRL1,630 .vtg_shift = 0,631 .vtg_bits = 3,632 .mode_reg = MENELAUS_DCDC_CTRL2,633};634 635static const struct menelaus_vtg vdcdc3_vtg = {636 .name = "VDCDC3",637 .vtg_reg = MENELAUS_DCDC_CTRL1,638 .vtg_shift = 3,639 .vtg_bits = 3,640 .mode_reg = MENELAUS_DCDC_CTRL3,641};642 643int menelaus_set_vdcdc(int dcdc, unsigned int mV)644{645 const struct menelaus_vtg *vtg;646 int val;647 648 if (dcdc != 2 && dcdc != 3)649 return -EINVAL;650 if (dcdc == 2)651 vtg = &vdcdc2_vtg;652 else653 vtg = &vdcdc3_vtg;654 655 if (mV == 0)656 return menelaus_set_voltage(vtg, 0, 0, 0);657 658 val = menelaus_get_vtg_value(mV, vdcdc_values,659 ARRAY_SIZE(vdcdc_values));660 if (val < 0)661 return -EINVAL;662 return menelaus_set_voltage(vtg, mV, val, 0x03);663}664 665static const struct menelaus_vtg_value vmmc_values[] = {666 { 1850, 0 },667 { 2800, 1 },668 { 3000, 2 },669 { 3100, 3 },670};671 672static const struct menelaus_vtg vmmc_vtg = {673 .name = "VMMC",674 .vtg_reg = MENELAUS_LDO_CTRL1,675 .vtg_shift = 6,676 .vtg_bits = 2,677 .mode_reg = MENELAUS_LDO_CTRL7,678};679 680int menelaus_set_vmmc(unsigned int mV)681{682 int val;683 684 if (mV == 0)685 return menelaus_set_voltage(&vmmc_vtg, 0, 0, 0);686 687 val = menelaus_get_vtg_value(mV, vmmc_values, ARRAY_SIZE(vmmc_values));688 if (val < 0)689 return -EINVAL;690 return menelaus_set_voltage(&vmmc_vtg, mV, val, 0x02);691}692EXPORT_SYMBOL(menelaus_set_vmmc);693 694 695static const struct menelaus_vtg_value vaux_values[] = {696 { 1500, 0 },697 { 1800, 1 },698 { 2500, 2 },699 { 2800, 3 },700};701 702static const struct menelaus_vtg vaux_vtg = {703 .name = "VAUX",704 .vtg_reg = MENELAUS_LDO_CTRL1,705 .vtg_shift = 4,706 .vtg_bits = 2,707 .mode_reg = MENELAUS_LDO_CTRL6,708};709 710int menelaus_set_vaux(unsigned int mV)711{712 int val;713 714 if (mV == 0)715 return menelaus_set_voltage(&vaux_vtg, 0, 0, 0);716 717 val = menelaus_get_vtg_value(mV, vaux_values, ARRAY_SIZE(vaux_values));718 if (val < 0)719 return -EINVAL;720 return menelaus_set_voltage(&vaux_vtg, mV, val, 0x02);721}722EXPORT_SYMBOL(menelaus_set_vaux);723 724int menelaus_get_slot_pin_states(void)725{726 return menelaus_read_reg(MENELAUS_MCT_PIN_ST);727}728EXPORT_SYMBOL(menelaus_get_slot_pin_states);729 730int menelaus_set_regulator_sleep(int enable, u32 val)731{732 int t, ret;733 struct i2c_client *c = the_menelaus->client;734 735 mutex_lock(&the_menelaus->lock);736 ret = menelaus_write_reg(MENELAUS_SLEEP_CTRL2, val);737 if (ret < 0)738 goto out;739 740 dev_dbg(&c->dev, "regulator sleep configuration: %02x\n", val);741 742 ret = menelaus_read_reg(MENELAUS_GPIO_CTRL);743 if (ret < 0)744 goto out;745 t = (GPIO_CTRL_SLPCTLEN | GPIO3_DIR_INPUT);746 if (enable)747 ret |= t;748 else749 ret &= ~t;750 ret = menelaus_write_reg(MENELAUS_GPIO_CTRL, ret);751out:752 mutex_unlock(&the_menelaus->lock);753 return ret;754}755 756/*-----------------------------------------------------------------------*/757 758/* Handles Menelaus interrupts. Does not run in interrupt context */759static void menelaus_work(struct work_struct *_menelaus)760{761 struct menelaus_chip *menelaus =762 container_of(_menelaus, struct menelaus_chip, work);763 void (*handler)(struct menelaus_chip *menelaus);764 765 while (1) {766 unsigned isr;767 768 isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)769 & ~menelaus->mask2) << 8;770 isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)771 & ~menelaus->mask1;772 if (!isr)773 break;774 775 while (isr) {776 int irq = fls(isr) - 1;777 isr &= ~(1 << irq);778 779 mutex_lock(&menelaus->lock);780 menelaus_disable_irq(irq);781 menelaus_ack_irq(irq);782 handler = menelaus->handlers[irq];783 if (handler)784 handler(menelaus);785 menelaus_enable_irq(irq);786 mutex_unlock(&menelaus->lock);787 }788 }789 enable_irq(menelaus->client->irq);790}791 792/*793 * We cannot use I2C in interrupt context, so we just schedule work.794 */795static irqreturn_t menelaus_irq(int irq, void *_menelaus)796{797 struct menelaus_chip *menelaus = _menelaus;798 799 disable_irq_nosync(irq);800 (void)schedule_work(&menelaus->work);801 802 return IRQ_HANDLED;803}804 805/*-----------------------------------------------------------------------*/806 807/*808 * The RTC needs to be set once, then it runs on backup battery power.809 * It supports alarms, including system wake alarms (from some modes);810 * and 1/second IRQs if requested.811 */812#ifdef CONFIG_RTC_DRV_TWL92330813 814#define RTC_CTRL_RTC_EN (1 << 0)815#define RTC_CTRL_AL_EN (1 << 1)816#define RTC_CTRL_MODE12 (1 << 2)817#define RTC_CTRL_EVERY_MASK (3 << 3)818#define RTC_CTRL_EVERY_SEC (0 << 3)819#define RTC_CTRL_EVERY_MIN (1 << 3)820#define RTC_CTRL_EVERY_HR (2 << 3)821#define RTC_CTRL_EVERY_DAY (3 << 3)822 823#define RTC_UPDATE_EVERY 0x08824 825#define RTC_HR_PM (1 << 7)826 827static void menelaus_to_time(char *regs, struct rtc_time *t)828{829 t->tm_sec = bcd2bin(regs[0]);830 t->tm_min = bcd2bin(regs[1]);831 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {832 t->tm_hour = bcd2bin(regs[2] & 0x1f) - 1;833 if (regs[2] & RTC_HR_PM)834 t->tm_hour += 12;835 } else836 t->tm_hour = bcd2bin(regs[2] & 0x3f);837 t->tm_mday = bcd2bin(regs[3]);838 t->tm_mon = bcd2bin(regs[4]) - 1;839 t->tm_year = bcd2bin(regs[5]) + 100;840}841 842static int time_to_menelaus(struct rtc_time *t, int regnum)843{844 int hour, status;845 846 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_sec));847 if (status < 0)848 goto fail;849 850 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_min));851 if (status < 0)852 goto fail;853 854 if (the_menelaus->rtc_control & RTC_CTRL_MODE12) {855 hour = t->tm_hour + 1;856 if (hour > 12)857 hour = RTC_HR_PM | bin2bcd(hour - 12);858 else859 hour = bin2bcd(hour);860 } else861 hour = bin2bcd(t->tm_hour);862 status = menelaus_write_reg(regnum++, hour);863 if (status < 0)864 goto fail;865 866 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mday));867 if (status < 0)868 goto fail;869 870 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_mon + 1));871 if (status < 0)872 goto fail;873 874 status = menelaus_write_reg(regnum++, bin2bcd(t->tm_year - 100));875 if (status < 0)876 goto fail;877 878 return 0;879fail:880 dev_err(&the_menelaus->client->dev, "rtc write reg %02x, err %d\n",881 --regnum, status);882 return status;883}884 885static int menelaus_read_time(struct device *dev, struct rtc_time *t)886{887 struct i2c_msg msg[2];888 char regs[7];889 int status;890 891 /* block read date and time registers */892 regs[0] = MENELAUS_RTC_SEC;893 894 msg[0].addr = MENELAUS_I2C_ADDRESS;895 msg[0].flags = 0;896 msg[0].len = 1;897 msg[0].buf = regs;898 899 msg[1].addr = MENELAUS_I2C_ADDRESS;900 msg[1].flags = I2C_M_RD;901 msg[1].len = sizeof(regs);902 msg[1].buf = regs;903 904 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);905 if (status != 2) {906 dev_err(dev, "%s error %d\n", "read", status);907 return -EIO;908 }909 910 menelaus_to_time(regs, t);911 t->tm_wday = bcd2bin(regs[6]);912 913 return 0;914}915 916static int menelaus_set_time(struct device *dev, struct rtc_time *t)917{918 int status;919 920 /* write date and time registers */921 status = time_to_menelaus(t, MENELAUS_RTC_SEC);922 if (status < 0)923 return status;924 status = menelaus_write_reg(MENELAUS_RTC_WKDAY, bin2bcd(t->tm_wday));925 if (status < 0) {926 dev_err(&the_menelaus->client->dev, "rtc write reg %02x "927 "err %d\n", MENELAUS_RTC_WKDAY, status);928 return status;929 }930 931 /* now commit the write */932 status = menelaus_write_reg(MENELAUS_RTC_UPDATE, RTC_UPDATE_EVERY);933 if (status < 0)934 dev_err(&the_menelaus->client->dev, "rtc commit time, err %d\n",935 status);936 937 return 0;938}939 940static int menelaus_read_alarm(struct device *dev, struct rtc_wkalrm *w)941{942 struct i2c_msg msg[2];943 char regs[6];944 int status;945 946 /* block read alarm registers */947 regs[0] = MENELAUS_RTC_AL_SEC;948 949 msg[0].addr = MENELAUS_I2C_ADDRESS;950 msg[0].flags = 0;951 msg[0].len = 1;952 msg[0].buf = regs;953 954 msg[1].addr = MENELAUS_I2C_ADDRESS;955 msg[1].flags = I2C_M_RD;956 msg[1].len = sizeof(regs);957 msg[1].buf = regs;958 959 status = i2c_transfer(the_menelaus->client->adapter, msg, 2);960 if (status != 2) {961 dev_err(dev, "%s error %d\n", "alarm read", status);962 return -EIO;963 }964 965 menelaus_to_time(regs, &w->time);966 967 w->enabled = !!(the_menelaus->rtc_control & RTC_CTRL_AL_EN);968 969 /* NOTE we *could* check if actually pending... */970 w->pending = 0;971 972 return 0;973}974 975static int menelaus_set_alarm(struct device *dev, struct rtc_wkalrm *w)976{977 int status;978 979 if (the_menelaus->client->irq <= 0 && w->enabled)980 return -ENODEV;981 982 /* clear previous alarm enable */983 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN) {984 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;985 status = menelaus_write_reg(MENELAUS_RTC_CTRL,986 the_menelaus->rtc_control);987 if (status < 0)988 return status;989 }990 991 /* write alarm registers */992 status = time_to_menelaus(&w->time, MENELAUS_RTC_AL_SEC);993 if (status < 0)994 return status;995 996 /* enable alarm if requested */997 if (w->enabled) {998 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;999 status = menelaus_write_reg(MENELAUS_RTC_CTRL,1000 the_menelaus->rtc_control);1001 }1002 1003 return status;1004}1005 1006#ifdef CONFIG_RTC_INTF_DEV1007 1008static void menelaus_rtc_update_work(struct menelaus_chip *m)1009{1010 /* report 1/sec update */1011 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_UF);1012}1013 1014static int menelaus_ioctl(struct device *dev, unsigned cmd, unsigned long arg)1015{1016 int status;1017 1018 if (the_menelaus->client->irq <= 0)1019 return -ENOIOCTLCMD;1020 1021 switch (cmd) {1022 /* alarm IRQ */1023 case RTC_AIE_ON:1024 if (the_menelaus->rtc_control & RTC_CTRL_AL_EN)1025 return 0;1026 the_menelaus->rtc_control |= RTC_CTRL_AL_EN;1027 break;1028 case RTC_AIE_OFF:1029 if (!(the_menelaus->rtc_control & RTC_CTRL_AL_EN))1030 return 0;1031 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;1032 break;1033 /* 1/second "update" IRQ */1034 case RTC_UIE_ON:1035 if (the_menelaus->uie)1036 return 0;1037 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);1038 status = menelaus_add_irq_work(MENELAUS_RTCTMR_IRQ,1039 menelaus_rtc_update_work);1040 if (status == 0)1041 the_menelaus->uie = 1;1042 return status;1043 case RTC_UIE_OFF:1044 if (!the_menelaus->uie)1045 return 0;1046 status = menelaus_remove_irq_work(MENELAUS_RTCTMR_IRQ);1047 if (status == 0)1048 the_menelaus->uie = 0;1049 return status;1050 default:1051 return -ENOIOCTLCMD;1052 }1053 return menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);1054}1055 1056#else1057#define menelaus_ioctl NULL1058#endif1059 1060/* REVISIT no compensation register support ... */1061 1062static const struct rtc_class_ops menelaus_rtc_ops = {1063 .ioctl = menelaus_ioctl,1064 .read_time = menelaus_read_time,1065 .set_time = menelaus_set_time,1066 .read_alarm = menelaus_read_alarm,1067 .set_alarm = menelaus_set_alarm,1068};1069 1070static void menelaus_rtc_alarm_work(struct menelaus_chip *m)1071{1072 /* report alarm */1073 rtc_update_irq(m->rtc, 1, RTC_IRQF | RTC_AF);1074 1075 /* then disable it; alarms are oneshot */1076 the_menelaus->rtc_control &= ~RTC_CTRL_AL_EN;1077 menelaus_write_reg(MENELAUS_RTC_CTRL, the_menelaus->rtc_control);1078}1079 1080static inline void menelaus_rtc_init(struct menelaus_chip *m)1081{1082 int alarm = (m->client->irq > 0);1083 int err;1084 1085 /* assume 32KDETEN pin is pulled high */1086 if (!(menelaus_read_reg(MENELAUS_OSC_CTRL) & 0x80)) {1087 dev_dbg(&m->client->dev, "no 32k oscillator\n");1088 return;1089 }1090 1091 m->rtc = devm_rtc_allocate_device(&m->client->dev);1092 if (IS_ERR(m->rtc))1093 return;1094 1095 m->rtc->ops = &menelaus_rtc_ops;1096 1097 /* support RTC alarm; it can issue wakeups */1098 if (alarm) {1099 if (menelaus_add_irq_work(MENELAUS_RTCALM_IRQ,1100 menelaus_rtc_alarm_work) < 0) {1101 dev_err(&m->client->dev, "can't handle RTC alarm\n");1102 return;1103 }1104 device_init_wakeup(&m->client->dev, 1);1105 }1106 1107 /* be sure RTC is enabled; allow 1/sec irqs; leave 12hr mode alone */1108 m->rtc_control = menelaus_read_reg(MENELAUS_RTC_CTRL);1109 if (!(m->rtc_control & RTC_CTRL_RTC_EN)1110 || (m->rtc_control & RTC_CTRL_AL_EN)1111 || (m->rtc_control & RTC_CTRL_EVERY_MASK)) {1112 if (!(m->rtc_control & RTC_CTRL_RTC_EN)) {1113 dev_warn(&m->client->dev, "rtc clock needs setting\n");1114 m->rtc_control |= RTC_CTRL_RTC_EN;1115 }1116 m->rtc_control &= ~RTC_CTRL_EVERY_MASK;1117 m->rtc_control &= ~RTC_CTRL_AL_EN;1118 menelaus_write_reg(MENELAUS_RTC_CTRL, m->rtc_control);1119 }1120 1121 err = devm_rtc_register_device(m->rtc);1122 if (err) {1123 if (alarm) {1124 menelaus_remove_irq_work(MENELAUS_RTCALM_IRQ);1125 device_init_wakeup(&m->client->dev, 0);1126 }1127 the_menelaus->rtc = NULL;1128 }1129}1130 1131#else1132 1133static inline void menelaus_rtc_init(struct menelaus_chip *m)1134{1135 /* nothing */1136}1137 1138#endif1139 1140/*-----------------------------------------------------------------------*/1141 1142static struct i2c_driver menelaus_i2c_driver;1143 1144static int menelaus_probe(struct i2c_client *client)1145{1146 struct menelaus_chip *menelaus;1147 int rev = 0;1148 int err = 0;1149 struct menelaus_platform_data *menelaus_pdata =1150 dev_get_platdata(&client->dev);1151 1152 if (the_menelaus) {1153 dev_dbg(&client->dev, "only one %s for now\n",1154 DRIVER_NAME);1155 return -ENODEV;1156 }1157 1158 menelaus = devm_kzalloc(&client->dev, sizeof(*menelaus), GFP_KERNEL);1159 if (!menelaus)1160 return -ENOMEM;1161 1162 i2c_set_clientdata(client, menelaus);1163 1164 the_menelaus = menelaus;1165 menelaus->client = client;1166 1167 /* If a true probe check the device */1168 rev = menelaus_read_reg(MENELAUS_REV);1169 if (rev < 0) {1170 pr_err(DRIVER_NAME ": device not found");1171 return -ENODEV;1172 }1173 1174 /* Ack and disable all Menelaus interrupts */1175 menelaus_write_reg(MENELAUS_INT_ACK1, 0xff);1176 menelaus_write_reg(MENELAUS_INT_ACK2, 0xff);1177 menelaus_write_reg(MENELAUS_INT_MASK1, 0xff);1178 menelaus_write_reg(MENELAUS_INT_MASK2, 0xff);1179 menelaus->mask1 = 0xff;1180 menelaus->mask2 = 0xff;1181 1182 /* Set output buffer strengths */1183 menelaus_write_reg(MENELAUS_MCT_CTRL1, 0x73);1184 1185 if (client->irq > 0) {1186 err = request_irq(client->irq, menelaus_irq, 0,1187 DRIVER_NAME, menelaus);1188 if (err) {1189 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",1190 client->irq, err);1191 return err;1192 }1193 }1194 1195 mutex_init(&menelaus->lock);1196 INIT_WORK(&menelaus->work, menelaus_work);1197 1198 pr_info("Menelaus rev %d.%d\n", rev >> 4, rev & 0x0f);1199 1200 err = menelaus_read_reg(MENELAUS_VCORE_CTRL1);1201 if (err < 0)1202 goto fail;1203 if (err & VCORE_CTRL1_HW_NSW)1204 menelaus->vcore_hw_mode = 1;1205 else1206 menelaus->vcore_hw_mode = 0;1207 1208 if (menelaus_pdata != NULL && menelaus_pdata->late_init != NULL) {1209 err = menelaus_pdata->late_init(&client->dev);1210 if (err < 0)1211 goto fail;1212 }1213 1214 menelaus_rtc_init(menelaus);1215 1216 return 0;1217fail:1218 free_irq(client->irq, menelaus);1219 flush_work(&menelaus->work);1220 return err;1221}1222 1223static void menelaus_remove(struct i2c_client *client)1224{1225 struct menelaus_chip *menelaus = i2c_get_clientdata(client);1226 1227 free_irq(client->irq, menelaus);1228 flush_work(&menelaus->work);1229 the_menelaus = NULL;1230}1231 1232static const struct i2c_device_id menelaus_id[] = {1233 { "menelaus" },1234 { }1235};1236MODULE_DEVICE_TABLE(i2c, menelaus_id);1237 1238static struct i2c_driver menelaus_i2c_driver = {1239 .driver = {1240 .name = DRIVER_NAME,1241 },1242 .probe = menelaus_probe,1243 .remove = menelaus_remove,1244 .id_table = menelaus_id,1245};1246 1247module_i2c_driver(menelaus_i2c_driver);1248 1249MODULE_AUTHOR("Texas Instruments, Inc. (and others)");1250MODULE_DESCRIPTION("I2C interface for Menelaus.");1251MODULE_LICENSE("GPL");1252