620 lines · c
1/*2 * Base driver for Marvell 88PM8003 *4 * Copyright (C) 2012 Marvell International Ltd.5 * Haojian Zhuang <haojian.zhuang@marvell.com>6 * Joseph(Yossi) Hanin <yhanin@marvell.com>7 * Qiao Zhou <zhouqiao@marvell.com>8 *9 * This file is subject to the terms and conditions of the GNU General10 * Public License. See the file "COPYING" in the main directory of this11 * archive for more details.12 *13 * This program is distributed in the hope that it will be useful,14 * but WITHOUT ANY WARRANTY; without even the implied warranty of15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the16 * GNU General Public License for more details.17 *18 * You should have received a copy of the GNU General Public License19 * along with this program; if not, write to the Free Software20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA21 */22 23#include <linux/kernel.h>24#include <linux/module.h>25#include <linux/err.h>26#include <linux/i2c.h>27#include <linux/mfd/core.h>28#include <linux/mfd/88pm80x.h>29#include <linux/slab.h>30 31/* Interrupt Registers */32#define PM800_INT_STATUS1 (0x05)33#define PM800_ONKEY_INT_STS1 (1 << 0)34#define PM800_EXTON_INT_STS1 (1 << 1)35#define PM800_CHG_INT_STS1 (1 << 2)36#define PM800_BAT_INT_STS1 (1 << 3)37#define PM800_RTC_INT_STS1 (1 << 4)38#define PM800_CLASSD_OC_INT_STS1 (1 << 5)39 40#define PM800_INT_STATUS2 (0x06)41#define PM800_VBAT_INT_STS2 (1 << 0)42#define PM800_VSYS_INT_STS2 (1 << 1)43#define PM800_VCHG_INT_STS2 (1 << 2)44#define PM800_TINT_INT_STS2 (1 << 3)45#define PM800_GPADC0_INT_STS2 (1 << 4)46#define PM800_TBAT_INT_STS2 (1 << 5)47#define PM800_GPADC2_INT_STS2 (1 << 6)48#define PM800_GPADC3_INT_STS2 (1 << 7)49 50#define PM800_INT_STATUS3 (0x07)51 52#define PM800_INT_STATUS4 (0x08)53#define PM800_GPIO0_INT_STS4 (1 << 0)54#define PM800_GPIO1_INT_STS4 (1 << 1)55#define PM800_GPIO2_INT_STS4 (1 << 2)56#define PM800_GPIO3_INT_STS4 (1 << 3)57#define PM800_GPIO4_INT_STS4 (1 << 4)58 59#define PM800_INT_ENA_1 (0x09)60#define PM800_ONKEY_INT_ENA1 (1 << 0)61#define PM800_EXTON_INT_ENA1 (1 << 1)62#define PM800_CHG_INT_ENA1 (1 << 2)63#define PM800_BAT_INT_ENA1 (1 << 3)64#define PM800_RTC_INT_ENA1 (1 << 4)65#define PM800_CLASSD_OC_INT_ENA1 (1 << 5)66 67#define PM800_INT_ENA_2 (0x0A)68#define PM800_VBAT_INT_ENA2 (1 << 0)69#define PM800_VSYS_INT_ENA2 (1 << 1)70#define PM800_VCHG_INT_ENA2 (1 << 2)71#define PM800_TINT_INT_ENA2 (1 << 3)72 73#define PM800_INT_ENA_3 (0x0B)74#define PM800_GPADC0_INT_ENA3 (1 << 0)75#define PM800_GPADC1_INT_ENA3 (1 << 1)76#define PM800_GPADC2_INT_ENA3 (1 << 2)77#define PM800_GPADC3_INT_ENA3 (1 << 3)78#define PM800_GPADC4_INT_ENA3 (1 << 4)79 80#define PM800_INT_ENA_4 (0x0C)81#define PM800_GPIO0_INT_ENA4 (1 << 0)82#define PM800_GPIO1_INT_ENA4 (1 << 1)83#define PM800_GPIO2_INT_ENA4 (1 << 2)84#define PM800_GPIO3_INT_ENA4 (1 << 3)85#define PM800_GPIO4_INT_ENA4 (1 << 4)86 87/* number of INT_ENA & INT_STATUS regs */88#define PM800_INT_REG_NUM (4)89 90/* Interrupt Number in 88PM800 */91enum {92 PM800_IRQ_ONKEY, /*EN1b0 *//*0 */93 PM800_IRQ_EXTON, /*EN1b1 */94 PM800_IRQ_CHG, /*EN1b2 */95 PM800_IRQ_BAT, /*EN1b3 */96 PM800_IRQ_RTC, /*EN1b4 */97 PM800_IRQ_CLASSD, /*EN1b5 *//*5 */98 PM800_IRQ_VBAT, /*EN2b0 */99 PM800_IRQ_VSYS, /*EN2b1 */100 PM800_IRQ_VCHG, /*EN2b2 */101 PM800_IRQ_TINT, /*EN2b3 */102 PM800_IRQ_GPADC0, /*EN3b0 *//*10 */103 PM800_IRQ_GPADC1, /*EN3b1 */104 PM800_IRQ_GPADC2, /*EN3b2 */105 PM800_IRQ_GPADC3, /*EN3b3 */106 PM800_IRQ_GPADC4, /*EN3b4 */107 PM800_IRQ_GPIO0, /*EN4b0 *//*15 */108 PM800_IRQ_GPIO1, /*EN4b1 */109 PM800_IRQ_GPIO2, /*EN4b2 */110 PM800_IRQ_GPIO3, /*EN4b3 */111 PM800_IRQ_GPIO4, /*EN4b4 *//*19 */112 PM800_MAX_IRQ,113};114 115/* PM800: generation identification number */116#define PM800_CHIP_GEN_ID_NUM 0x3117 118static const struct i2c_device_id pm80x_id_table[] = {119 { "88PM800" },120 {} /* NULL terminated */121};122MODULE_DEVICE_TABLE(i2c, pm80x_id_table);123 124static const struct resource rtc_resources[] = {125 DEFINE_RES_IRQ_NAMED(PM800_IRQ_RTC, "88pm80x-rtc"),126};127 128static struct mfd_cell rtc_devs[] = {129 {130 .name = "88pm80x-rtc",131 .num_resources = ARRAY_SIZE(rtc_resources),132 .resources = &rtc_resources[0],133 .id = -1,134 },135};136 137static struct resource onkey_resources[] = {138 DEFINE_RES_IRQ_NAMED(PM800_IRQ_ONKEY, "88pm80x-onkey"),139};140 141static const struct mfd_cell onkey_devs[] = {142 {143 .name = "88pm80x-onkey",144 .num_resources = 1,145 .resources = &onkey_resources[0],146 .id = -1,147 },148};149 150static const struct mfd_cell regulator_devs[] = {151 {152 .name = "88pm80x-regulator",153 .id = -1,154 },155};156 157static const struct regmap_irq pm800_irqs[] = {158 /* INT0 */159 [PM800_IRQ_ONKEY] = {160 .mask = PM800_ONKEY_INT_ENA1,161 },162 [PM800_IRQ_EXTON] = {163 .mask = PM800_EXTON_INT_ENA1,164 },165 [PM800_IRQ_CHG] = {166 .mask = PM800_CHG_INT_ENA1,167 },168 [PM800_IRQ_BAT] = {169 .mask = PM800_BAT_INT_ENA1,170 },171 [PM800_IRQ_RTC] = {172 .mask = PM800_RTC_INT_ENA1,173 },174 [PM800_IRQ_CLASSD] = {175 .mask = PM800_CLASSD_OC_INT_ENA1,176 },177 /* INT1 */178 [PM800_IRQ_VBAT] = {179 .reg_offset = 1,180 .mask = PM800_VBAT_INT_ENA2,181 },182 [PM800_IRQ_VSYS] = {183 .reg_offset = 1,184 .mask = PM800_VSYS_INT_ENA2,185 },186 [PM800_IRQ_VCHG] = {187 .reg_offset = 1,188 .mask = PM800_VCHG_INT_ENA2,189 },190 [PM800_IRQ_TINT] = {191 .reg_offset = 1,192 .mask = PM800_TINT_INT_ENA2,193 },194 /* INT2 */195 [PM800_IRQ_GPADC0] = {196 .reg_offset = 2,197 .mask = PM800_GPADC0_INT_ENA3,198 },199 [PM800_IRQ_GPADC1] = {200 .reg_offset = 2,201 .mask = PM800_GPADC1_INT_ENA3,202 },203 [PM800_IRQ_GPADC2] = {204 .reg_offset = 2,205 .mask = PM800_GPADC2_INT_ENA3,206 },207 [PM800_IRQ_GPADC3] = {208 .reg_offset = 2,209 .mask = PM800_GPADC3_INT_ENA3,210 },211 [PM800_IRQ_GPADC4] = {212 .reg_offset = 2,213 .mask = PM800_GPADC4_INT_ENA3,214 },215 /* INT3 */216 [PM800_IRQ_GPIO0] = {217 .reg_offset = 3,218 .mask = PM800_GPIO0_INT_ENA4,219 },220 [PM800_IRQ_GPIO1] = {221 .reg_offset = 3,222 .mask = PM800_GPIO1_INT_ENA4,223 },224 [PM800_IRQ_GPIO2] = {225 .reg_offset = 3,226 .mask = PM800_GPIO2_INT_ENA4,227 },228 [PM800_IRQ_GPIO3] = {229 .reg_offset = 3,230 .mask = PM800_GPIO3_INT_ENA4,231 },232 [PM800_IRQ_GPIO4] = {233 .reg_offset = 3,234 .mask = PM800_GPIO4_INT_ENA4,235 },236};237 238static int device_gpadc_init(struct pm80x_chip *chip,239 struct pm80x_platform_data *pdata)240{241 struct pm80x_subchip *subchip = chip->subchip;242 struct regmap *map = subchip->regmap_gpadc;243 int data = 0, mask = 0, ret = 0;244 245 if (!map) {246 dev_warn(chip->dev,247 "Warning: gpadc regmap is not available!\n");248 return -EINVAL;249 }250 /*251 * initialize GPADC without activating it turn on GPADC252 * measurments253 */254 ret = regmap_update_bits(map,255 PM800_GPADC_MISC_CONFIG2,256 PM800_GPADC_MISC_GPFSM_EN,257 PM800_GPADC_MISC_GPFSM_EN);258 if (ret < 0)259 goto out;260 /*261 * This function configures the ADC as requires for262 * CP implementation.CP does not "own" the ADC configuration263 * registers and relies on AP.264 * Reason: enable automatic ADC measurements needed265 * for CP to get VBAT and RF temperature readings.266 */267 ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN1,268 PM800_MEAS_EN1_VBAT, PM800_MEAS_EN1_VBAT);269 if (ret < 0)270 goto out;271 ret = regmap_update_bits(map, PM800_GPADC_MEAS_EN2,272 (PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN),273 (PM800_MEAS_EN2_RFTMP | PM800_MEAS_GP0_EN));274 if (ret < 0)275 goto out;276 277 /*278 * the defult of PM800 is GPADC operates at 100Ks/s rate279 * and Number of GPADC slots with active current bias prior280 * to GPADC sampling = 1 slot for all GPADCs set for281 * Temprature mesurmants282 */283 mask = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |284 PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);285 286 if (pdata && (pdata->batt_det == 0))287 data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN1 |288 PM800_GPADC_GP_BIAS_EN2 | PM800_GPADC_GP_BIAS_EN3);289 else290 data = (PM800_GPADC_GP_BIAS_EN0 | PM800_GPADC_GP_BIAS_EN2 |291 PM800_GPADC_GP_BIAS_EN3);292 293 ret = regmap_update_bits(map, PM800_GP_BIAS_ENA1, mask, data);294 if (ret < 0)295 goto out;296 297 dev_info(chip->dev, "pm800 device_gpadc_init: Done\n");298 return 0;299 300out:301 dev_info(chip->dev, "pm800 device_gpadc_init: Failed!\n");302 return ret;303}304 305static int device_onkey_init(struct pm80x_chip *chip,306 struct pm80x_platform_data *pdata)307{308 int ret;309 310 ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],311 ARRAY_SIZE(onkey_devs), &onkey_resources[0], 0,312 NULL);313 if (ret) {314 dev_err(chip->dev, "Failed to add onkey subdev\n");315 return ret;316 }317 318 return 0;319}320 321static int device_rtc_init(struct pm80x_chip *chip,322 struct pm80x_platform_data *pdata)323{324 int ret;325 326 if (pdata) {327 rtc_devs[0].platform_data = pdata->rtc;328 rtc_devs[0].pdata_size =329 pdata->rtc ? sizeof(struct pm80x_rtc_pdata) : 0;330 }331 ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],332 ARRAY_SIZE(rtc_devs), NULL, 0, NULL);333 if (ret) {334 dev_err(chip->dev, "Failed to add rtc subdev\n");335 return ret;336 }337 338 return 0;339}340 341static int device_regulator_init(struct pm80x_chip *chip,342 struct pm80x_platform_data *pdata)343{344 int ret;345 346 ret = mfd_add_devices(chip->dev, 0, ®ulator_devs[0],347 ARRAY_SIZE(regulator_devs), NULL, 0, NULL);348 if (ret) {349 dev_err(chip->dev, "Failed to add regulator subdev\n");350 return ret;351 }352 353 return 0;354}355 356static int device_irq_init_800(struct pm80x_chip *chip)357{358 struct regmap *map = chip->regmap;359 unsigned long flags = IRQF_ONESHOT;360 int data, mask, ret = -EINVAL;361 362 if (!map || !chip->irq) {363 dev_err(chip->dev, "incorrect parameters\n");364 return -EINVAL;365 }366 367 /*368 * irq_mode defines the way of clearing interrupt. it's read-clear by369 * default.370 */371 mask =372 PM800_WAKEUP2_INV_INT | PM800_WAKEUP2_INT_CLEAR |373 PM800_WAKEUP2_INT_MASK;374 375 data = PM800_WAKEUP2_INT_CLEAR;376 ret = regmap_update_bits(map, PM800_WAKEUP2, mask, data);377 378 if (ret < 0)379 goto out;380 381 ret =382 regmap_add_irq_chip(chip->regmap, chip->irq, flags, -1,383 chip->regmap_irq_chip, &chip->irq_data);384 385out:386 return ret;387}388 389static void device_irq_exit_800(struct pm80x_chip *chip)390{391 regmap_del_irq_chip(chip->irq, chip->irq_data);392}393 394static const struct regmap_irq_chip pm800_irq_chip = {395 .name = "88pm800",396 .irqs = pm800_irqs,397 .num_irqs = ARRAY_SIZE(pm800_irqs),398 399 .num_regs = 4,400 .status_base = PM800_INT_STATUS1,401 .unmask_base = PM800_INT_ENA_1,402 .ack_base = PM800_INT_STATUS1,403};404 405static int pm800_pages_init(struct pm80x_chip *chip)406{407 struct pm80x_subchip *subchip;408 struct i2c_client *client = chip->client;409 410 int ret = 0;411 412 subchip = chip->subchip;413 if (!subchip || !subchip->power_page_addr || !subchip->gpadc_page_addr)414 return -ENODEV;415 416 /* PM800 block power page */417 subchip->power_page = i2c_new_dummy_device(client->adapter,418 subchip->power_page_addr);419 if (IS_ERR(subchip->power_page)) {420 ret = PTR_ERR(subchip->power_page);421 goto out;422 }423 424 subchip->regmap_power = devm_regmap_init_i2c(subchip->power_page,425 &pm80x_regmap_config);426 if (IS_ERR(subchip->regmap_power)) {427 ret = PTR_ERR(subchip->regmap_power);428 dev_err(chip->dev,429 "Failed to allocate regmap_power: %d\n", ret);430 goto out;431 }432 433 i2c_set_clientdata(subchip->power_page, chip);434 435 /* PM800 block GPADC */436 subchip->gpadc_page = i2c_new_dummy_device(client->adapter,437 subchip->gpadc_page_addr);438 if (IS_ERR(subchip->gpadc_page)) {439 ret = PTR_ERR(subchip->gpadc_page);440 goto out;441 }442 443 subchip->regmap_gpadc = devm_regmap_init_i2c(subchip->gpadc_page,444 &pm80x_regmap_config);445 if (IS_ERR(subchip->regmap_gpadc)) {446 ret = PTR_ERR(subchip->regmap_gpadc);447 dev_err(chip->dev,448 "Failed to allocate regmap_gpadc: %d\n", ret);449 goto out;450 }451 i2c_set_clientdata(subchip->gpadc_page, chip);452 453out:454 return ret;455}456 457static void pm800_pages_exit(struct pm80x_chip *chip)458{459 struct pm80x_subchip *subchip;460 461 subchip = chip->subchip;462 463 if (subchip && subchip->power_page)464 i2c_unregister_device(subchip->power_page);465 466 if (subchip && subchip->gpadc_page)467 i2c_unregister_device(subchip->gpadc_page);468}469 470static int device_800_init(struct pm80x_chip *chip,471 struct pm80x_platform_data *pdata)472{473 int ret;474 unsigned int val;475 476 /*477 * alarm wake up bit will be clear in device_irq_init(),478 * read before that479 */480 ret = regmap_read(chip->regmap, PM800_RTC_CONTROL, &val);481 if (ret < 0) {482 dev_err(chip->dev, "Failed to read RTC register: %d\n", ret);483 goto out;484 }485 if (val & PM800_ALARM_WAKEUP) {486 if (pdata && pdata->rtc)487 pdata->rtc->rtc_wakeup = 1;488 }489 490 ret = device_gpadc_init(chip, pdata);491 if (ret < 0) {492 dev_err(chip->dev, "[%s]Failed to init gpadc\n", __func__);493 goto out;494 }495 496 chip->regmap_irq_chip = &pm800_irq_chip;497 498 ret = device_irq_init_800(chip);499 if (ret < 0) {500 dev_err(chip->dev, "[%s]Failed to init pm800 irq\n", __func__);501 goto out;502 }503 504 ret = device_onkey_init(chip, pdata);505 if (ret) {506 dev_err(chip->dev, "Failed to add onkey subdev\n");507 goto out_dev;508 }509 510 ret = device_rtc_init(chip, pdata);511 if (ret) {512 dev_err(chip->dev, "Failed to add rtc subdev\n");513 goto out;514 }515 516 ret = device_regulator_init(chip, pdata);517 if (ret) {518 dev_err(chip->dev, "Failed to add regulators subdev\n");519 goto out;520 }521 522 return 0;523out_dev:524 mfd_remove_devices(chip->dev);525 device_irq_exit_800(chip);526out:527 return ret;528}529 530static int pm800_probe(struct i2c_client *client)531{532 int ret = 0;533 struct pm80x_chip *chip;534 struct pm80x_platform_data *pdata = dev_get_platdata(&client->dev);535 struct pm80x_subchip *subchip;536 537 ret = pm80x_init(client);538 if (ret) {539 dev_err(&client->dev, "pm800_init fail\n");540 goto out_init;541 }542 543 chip = i2c_get_clientdata(client);544 545 /* init subchip for PM800 */546 subchip =547 devm_kzalloc(&client->dev, sizeof(struct pm80x_subchip),548 GFP_KERNEL);549 if (!subchip) {550 ret = -ENOMEM;551 goto err_subchip_alloc;552 }553 554 /* pm800 has 2 addtional pages to support power and gpadc. */555 subchip->power_page_addr = client->addr + 1;556 subchip->gpadc_page_addr = client->addr + 2;557 chip->subchip = subchip;558 559 ret = pm800_pages_init(chip);560 if (ret) {561 dev_err(&client->dev, "pm800_pages_init failed!\n");562 goto err_device_init;563 }564 565 ret = device_800_init(chip, pdata);566 if (ret) {567 dev_err(chip->dev, "Failed to initialize 88pm800 devices\n");568 goto err_device_init;569 }570 571 if (pdata && pdata->plat_config)572 pdata->plat_config(chip, pdata);573 574 return 0;575 576err_device_init:577 pm800_pages_exit(chip);578err_subchip_alloc:579 pm80x_deinit();580out_init:581 return ret;582}583 584static void pm800_remove(struct i2c_client *client)585{586 struct pm80x_chip *chip = i2c_get_clientdata(client);587 588 mfd_remove_devices(chip->dev);589 device_irq_exit_800(chip);590 591 pm800_pages_exit(chip);592 pm80x_deinit();593}594 595static struct i2c_driver pm800_driver = {596 .driver = {597 .name = "88PM800",598 .pm = pm_sleep_ptr(&pm80x_pm_ops),599 },600 .probe = pm800_probe,601 .remove = pm800_remove,602 .id_table = pm80x_id_table,603};604 605static int __init pm800_i2c_init(void)606{607 return i2c_add_driver(&pm800_driver);608}609subsys_initcall(pm800_i2c_init);610 611static void __exit pm800_i2c_exit(void)612{613 i2c_del_driver(&pm800_driver);614}615module_exit(pm800_i2c_exit);616 617MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM800");618MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");619MODULE_LICENSE("GPL");620