Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Battery driver for Marvell 88PM860x PMIC |
| 3 | * |
| 4 | * Copyright (c) 2012 Marvell International Ltd. |
| 5 | * Author: Jett Zhou <jtzhou@marvell.com> |
| 6 | * Haojian Zhuang <haojian.zhuang@marvell.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/power_supply.h> |
| 18 | #include <linux/mfd/88pm860x.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/uaccess.h> |
| 21 | #include <asm/div64.h> |
| 22 | |
| 23 | /* bit definitions of Status Query Interface 2 */ |
| 24 | #define STATUS2_CHG (1 << 2) |
| 25 | |
| 26 | /* bit definitions of Reset Out Register */ |
| 27 | #define RESET_SW_PD (1 << 7) |
| 28 | |
| 29 | /* bit definitions of PreReg 1 */ |
| 30 | #define PREREG1_90MA (0x0) |
| 31 | #define PREREG1_180MA (0x1) |
| 32 | #define PREREG1_450MA (0x4) |
| 33 | #define PREREG1_540MA (0x5) |
| 34 | #define PREREG1_1350MA (0xE) |
| 35 | #define PREREG1_VSYS_4_5V (3 << 4) |
| 36 | |
| 37 | /* bit definitions of Charger Control 1 Register */ |
| 38 | #define CC1_MODE_OFF (0) |
| 39 | #define CC1_MODE_PRECHARGE (1) |
| 40 | #define CC1_MODE_FASTCHARGE (2) |
| 41 | #define CC1_MODE_PULSECHARGE (3) |
| 42 | #define CC1_ITERM_20MA (0 << 2) |
| 43 | #define CC1_ITERM_60MA (2 << 2) |
| 44 | #define CC1_VFCHG_4_2V (9 << 4) |
| 45 | |
| 46 | /* bit definitions of Charger Control 2 Register */ |
| 47 | #define CC2_ICHG_100MA (0x1) |
| 48 | #define CC2_ICHG_500MA (0x9) |
| 49 | #define CC2_ICHG_1000MA (0x13) |
| 50 | |
| 51 | /* bit definitions of Charger Control 3 Register */ |
| 52 | #define CC3_180MIN_TIMEOUT (0x6 << 4) |
| 53 | #define CC3_270MIN_TIMEOUT (0x7 << 4) |
| 54 | #define CC3_360MIN_TIMEOUT (0xA << 4) |
| 55 | #define CC3_DISABLE_TIMEOUT (0xF << 4) |
| 56 | |
| 57 | /* bit definitions of Charger Control 4 Register */ |
| 58 | #define CC4_IPRE_40MA (7) |
| 59 | #define CC4_VPCHG_3_2V (3 << 4) |
| 60 | #define CC4_IFCHG_MON_EN (1 << 6) |
| 61 | #define CC4_BTEMP_MON_EN (1 << 7) |
| 62 | |
| 63 | /* bit definitions of Charger Control 6 Register */ |
| 64 | #define CC6_BAT_OV_EN (1 << 2) |
| 65 | #define CC6_BAT_UV_EN (1 << 3) |
| 66 | #define CC6_UV_VBAT_SET (0x3 << 6) /* 2.8v */ |
| 67 | |
| 68 | /* bit definitions of Charger Control 7 Register */ |
| 69 | #define CC7_BAT_REM_EN (1 << 3) |
| 70 | #define CC7_IFSM_EN (1 << 7) |
| 71 | |
| 72 | /* bit definitions of Measurement Enable 1 Register */ |
| 73 | #define MEAS1_VBAT (1 << 0) |
| 74 | |
| 75 | /* bit definitions of Measurement Enable 3 Register */ |
| 76 | #define MEAS3_IBAT_EN (1 << 0) |
| 77 | #define MEAS3_CC_EN (1 << 2) |
| 78 | |
| 79 | #define FSM_INIT 0 |
| 80 | #define FSM_DISCHARGE 1 |
| 81 | #define FSM_PRECHARGE 2 |
| 82 | #define FSM_FASTCHARGE 3 |
| 83 | |
| 84 | #define PRECHARGE_THRESHOLD 3100 |
| 85 | #define POWEROFF_THRESHOLD 3400 |
| 86 | #define CHARGE_THRESHOLD 4000 |
| 87 | #define DISCHARGE_THRESHOLD 4180 |
| 88 | |
| 89 | /* over-temperature on PM8606 setting */ |
| 90 | #define OVER_TEMP_FLAG (1 << 6) |
| 91 | #define OVTEMP_AUTORECOVER (1 << 3) |
| 92 | |
| 93 | /* over-voltage protect on vchg setting mv */ |
| 94 | #define VCHG_NORMAL_LOW 4200 |
| 95 | #define VCHG_NORMAL_CHECK 5800 |
| 96 | #define VCHG_NORMAL_HIGH 6000 |
| 97 | #define VCHG_OVP_LOW 5500 |
| 98 | |
| 99 | struct pm860x_charger_info { |
| 100 | struct pm860x_chip *chip; |
| 101 | struct i2c_client *i2c; |
| 102 | struct i2c_client *i2c_8606; |
| 103 | struct device *dev; |
| 104 | |
| 105 | struct power_supply usb; |
| 106 | struct mutex lock; |
| 107 | int irq_nums; |
| 108 | int irq[7]; |
| 109 | unsigned state:3; /* fsm state */ |
| 110 | unsigned online:1; /* usb charger */ |
| 111 | unsigned present:1; /* battery present */ |
| 112 | unsigned allowed:1; |
| 113 | }; |
| 114 | |
| 115 | static char *pm860x_supplied_to[] = { |
| 116 | "battery-monitor", |
| 117 | }; |
| 118 | |
| 119 | static int measure_vchg(struct pm860x_charger_info *info, int *data) |
| 120 | { |
| 121 | unsigned char buf[2]; |
| 122 | int ret = 0; |
| 123 | |
| 124 | ret = pm860x_bulk_read(info->i2c, PM8607_VCHG_MEAS1, 2, buf); |
| 125 | if (ret < 0) |
| 126 | return ret; |
| 127 | |
| 128 | *data = ((buf[0] & 0xff) << 4) | (buf[1] & 0x0f); |
| 129 | /* V_BATT_MEAS(mV) = value * 5 * 1.8 * 1000 / (2^12) */ |
| 130 | *data = ((*data & 0xfff) * 9 * 125) >> 9; |
| 131 | |
| 132 | dev_dbg(info->dev, "%s, vchg: %d mv\n", __func__, *data); |
| 133 | |
| 134 | return ret; |
| 135 | } |
| 136 | |
| 137 | static void set_vchg_threshold(struct pm860x_charger_info *info, |
| 138 | int min, int max) |
| 139 | { |
| 140 | int data; |
| 141 | |
| 142 | /* (tmp << 8) * / 5 / 1800 */ |
| 143 | if (min <= 0) |
| 144 | data = 0; |
| 145 | else |
| 146 | data = (min << 5) / 1125; |
| 147 | pm860x_reg_write(info->i2c, PM8607_VCHG_LOWTH, data); |
| 148 | dev_dbg(info->dev, "VCHG_LOWTH:%dmv, 0x%x\n", min, data); |
| 149 | |
| 150 | if (max <= 0) |
| 151 | data = 0xff; |
| 152 | else |
| 153 | data = (max << 5) / 1125; |
| 154 | pm860x_reg_write(info->i2c, PM8607_VCHG_HIGHTH, data); |
| 155 | dev_dbg(info->dev, "VCHG_HIGHTH:%dmv, 0x%x\n", max, data); |
| 156 | |
| 157 | } |
| 158 | |
| 159 | static void set_vbatt_threshold(struct pm860x_charger_info *info, |
| 160 | int min, int max) |
| 161 | { |
| 162 | int data; |
| 163 | |
| 164 | /* (tmp << 8) * 3 / 1800 */ |
| 165 | if (min <= 0) |
| 166 | data = 0; |
| 167 | else |
| 168 | data = (min << 5) / 675; |
| 169 | pm860x_reg_write(info->i2c, PM8607_VBAT_LOWTH, data); |
| 170 | dev_dbg(info->dev, "VBAT Min:%dmv, LOWTH:0x%x\n", min, data); |
| 171 | |
| 172 | if (max <= 0) |
| 173 | data = 0xff; |
| 174 | else |
| 175 | data = (max << 5) / 675; |
| 176 | pm860x_reg_write(info->i2c, PM8607_VBAT_HIGHTH, data); |
| 177 | dev_dbg(info->dev, "VBAT Max:%dmv, HIGHTH:0x%x\n", max, data); |
| 178 | |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | static int start_precharge(struct pm860x_charger_info *info) |
| 183 | { |
| 184 | int ret; |
| 185 | |
| 186 | dev_dbg(info->dev, "Start Pre-charging!\n"); |
| 187 | set_vbatt_threshold(info, 0, 0); |
| 188 | |
| 189 | ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA, |
| 190 | PREREG1_1350MA | PREREG1_VSYS_4_5V); |
| 191 | if (ret < 0) |
| 192 | goto out; |
| 193 | /* stop charging */ |
| 194 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, |
| 195 | CC1_MODE_OFF); |
| 196 | if (ret < 0) |
| 197 | goto out; |
| 198 | /* set 270 minutes timeout */ |
| 199 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4), |
| 200 | CC3_270MIN_TIMEOUT); |
| 201 | if (ret < 0) |
| 202 | goto out; |
| 203 | /* set precharge current, termination voltage, IBAT & TBAT monitor */ |
| 204 | ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL4, |
| 205 | CC4_IPRE_40MA | CC4_VPCHG_3_2V | |
| 206 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN); |
| 207 | if (ret < 0) |
| 208 | goto out; |
| 209 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7, |
| 210 | CC7_BAT_REM_EN | CC7_IFSM_EN, |
| 211 | CC7_BAT_REM_EN | CC7_IFSM_EN); |
| 212 | if (ret < 0) |
| 213 | goto out; |
| 214 | /* trigger precharge */ |
| 215 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, |
| 216 | CC1_MODE_PRECHARGE); |
| 217 | out: |
| 218 | return ret; |
| 219 | } |
| 220 | |
| 221 | static int start_fastcharge(struct pm860x_charger_info *info) |
| 222 | { |
| 223 | int ret; |
| 224 | |
| 225 | dev_dbg(info->dev, "Start Fast-charging!\n"); |
| 226 | |
| 227 | /* set fastcharge termination current & voltage, disable charging */ |
| 228 | ret = pm860x_reg_write(info->i2c, PM8607_CHG_CTRL1, |
| 229 | CC1_MODE_OFF | CC1_ITERM_60MA | |
| 230 | CC1_VFCHG_4_2V); |
| 231 | if (ret < 0) |
| 232 | goto out; |
| 233 | ret = pm860x_reg_write(info->i2c_8606, PM8606_PREREGULATORA, |
| 234 | PREREG1_540MA | PREREG1_VSYS_4_5V); |
| 235 | if (ret < 0) |
| 236 | goto out; |
| 237 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL2, 0x1f, |
| 238 | CC2_ICHG_500MA); |
| 239 | if (ret < 0) |
| 240 | goto out; |
| 241 | /* set 270 minutes timeout */ |
| 242 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL3, (0xf << 4), |
| 243 | CC3_270MIN_TIMEOUT); |
| 244 | if (ret < 0) |
| 245 | goto out; |
| 246 | /* set IBAT & TBAT monitor */ |
| 247 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL4, |
| 248 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN, |
| 249 | CC4_IFCHG_MON_EN | CC4_BTEMP_MON_EN); |
| 250 | if (ret < 0) |
| 251 | goto out; |
| 252 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL6, |
| 253 | CC6_BAT_OV_EN | CC6_BAT_UV_EN | |
| 254 | CC6_UV_VBAT_SET, |
| 255 | CC6_BAT_OV_EN | CC6_BAT_UV_EN | |
| 256 | CC6_UV_VBAT_SET); |
| 257 | if (ret < 0) |
| 258 | goto out; |
| 259 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL7, |
| 260 | CC7_BAT_REM_EN | CC7_IFSM_EN, |
| 261 | CC7_BAT_REM_EN | CC7_IFSM_EN); |
| 262 | if (ret < 0) |
| 263 | goto out; |
| 264 | /* launch fast-charge */ |
| 265 | ret = pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, |
| 266 | CC1_MODE_FASTCHARGE); |
| 267 | /* vchg threshold setting */ |
| 268 | set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_NORMAL_HIGH); |
| 269 | out: |
| 270 | return ret; |
| 271 | } |
| 272 | |
| 273 | static void stop_charge(struct pm860x_charger_info *info, int vbatt) |
| 274 | { |
| 275 | dev_dbg(info->dev, "Stop charging!\n"); |
| 276 | pm860x_set_bits(info->i2c, PM8607_CHG_CTRL1, 3, CC1_MODE_OFF); |
| 277 | if (vbatt > CHARGE_THRESHOLD && info->online) |
| 278 | set_vbatt_threshold(info, CHARGE_THRESHOLD, 0); |
| 279 | } |
| 280 | |
| 281 | static void power_off_notification(struct pm860x_charger_info *info) |
| 282 | { |
| 283 | dev_dbg(info->dev, "Power-off notification!\n"); |
| 284 | } |
| 285 | |
| 286 | static int set_charging_fsm(struct pm860x_charger_info *info) |
| 287 | { |
| 288 | struct power_supply *psy; |
| 289 | union power_supply_propval data; |
| 290 | unsigned char fsm_state[][16] = { "init", "discharge", "precharge", |
| 291 | "fastcharge", |
| 292 | }; |
| 293 | int ret; |
| 294 | int vbatt; |
| 295 | |
| 296 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); |
| 297 | if (!psy) |
| 298 | return -EINVAL; |
| 299 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &data); |
| 300 | if (ret) |
| 301 | return ret; |
| 302 | vbatt = data.intval / 1000; |
| 303 | |
| 304 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_PRESENT, &data); |
| 305 | if (ret) |
| 306 | return ret; |
| 307 | |
| 308 | mutex_lock(&info->lock); |
| 309 | info->present = data.intval; |
| 310 | |
| 311 | dev_dbg(info->dev, "Entering FSM:%s, Charger:%s, Battery:%s, " |
| 312 | "Allowed:%d\n", |
| 313 | &fsm_state[info->state][0], |
| 314 | (info->online) ? "online" : "N/A", |
| 315 | (info->present) ? "present" : "N/A", info->allowed); |
| 316 | dev_dbg(info->dev, "set_charging_fsm:vbatt:%d(mV)\n", vbatt); |
| 317 | |
| 318 | switch (info->state) { |
| 319 | case FSM_INIT: |
| 320 | if (info->online && info->present && info->allowed) { |
| 321 | if (vbatt < PRECHARGE_THRESHOLD) { |
| 322 | info->state = FSM_PRECHARGE; |
| 323 | start_precharge(info); |
| 324 | } else if (vbatt > DISCHARGE_THRESHOLD) { |
| 325 | info->state = FSM_DISCHARGE; |
| 326 | stop_charge(info, vbatt); |
| 327 | } else if (vbatt < DISCHARGE_THRESHOLD) { |
| 328 | info->state = FSM_FASTCHARGE; |
| 329 | start_fastcharge(info); |
| 330 | } |
| 331 | } else { |
| 332 | if (vbatt < POWEROFF_THRESHOLD) { |
| 333 | power_off_notification(info); |
| 334 | } else { |
| 335 | info->state = FSM_DISCHARGE; |
| 336 | stop_charge(info, vbatt); |
| 337 | } |
| 338 | } |
| 339 | break; |
| 340 | case FSM_PRECHARGE: |
| 341 | if (info->online && info->present && info->allowed) { |
| 342 | if (vbatt > PRECHARGE_THRESHOLD) { |
| 343 | info->state = FSM_FASTCHARGE; |
| 344 | start_fastcharge(info); |
| 345 | } |
| 346 | } else { |
| 347 | info->state = FSM_DISCHARGE; |
| 348 | stop_charge(info, vbatt); |
| 349 | } |
| 350 | break; |
| 351 | case FSM_FASTCHARGE: |
| 352 | if (info->online && info->present && info->allowed) { |
| 353 | if (vbatt < PRECHARGE_THRESHOLD) { |
| 354 | info->state = FSM_PRECHARGE; |
| 355 | start_precharge(info); |
| 356 | } |
| 357 | } else { |
| 358 | info->state = FSM_DISCHARGE; |
| 359 | stop_charge(info, vbatt); |
| 360 | } |
| 361 | break; |
| 362 | case FSM_DISCHARGE: |
| 363 | if (info->online && info->present && info->allowed) { |
| 364 | if (vbatt < PRECHARGE_THRESHOLD) { |
| 365 | info->state = FSM_PRECHARGE; |
| 366 | start_precharge(info); |
| 367 | } else if (vbatt < DISCHARGE_THRESHOLD) { |
| 368 | info->state = FSM_FASTCHARGE; |
| 369 | start_fastcharge(info); |
| 370 | } |
| 371 | } else { |
| 372 | if (vbatt < POWEROFF_THRESHOLD) |
| 373 | power_off_notification(info); |
| 374 | else if (vbatt > CHARGE_THRESHOLD && info->online) |
| 375 | set_vbatt_threshold(info, CHARGE_THRESHOLD, 0); |
| 376 | } |
| 377 | break; |
| 378 | default: |
| 379 | dev_warn(info->dev, "FSM meets wrong state:%d\n", |
| 380 | info->state); |
| 381 | break; |
| 382 | } |
| 383 | dev_dbg(info->dev, |
| 384 | "Out FSM:%s, Charger:%s, Battery:%s, Allowed:%d\n", |
| 385 | &fsm_state[info->state][0], |
| 386 | (info->online) ? "online" : "N/A", |
| 387 | (info->present) ? "present" : "N/A", info->allowed); |
| 388 | mutex_unlock(&info->lock); |
| 389 | |
| 390 | return 0; |
| 391 | } |
| 392 | |
| 393 | static irqreturn_t pm860x_charger_handler(int irq, void *data) |
| 394 | { |
| 395 | struct pm860x_charger_info *info = data; |
| 396 | int ret; |
| 397 | |
| 398 | mutex_lock(&info->lock); |
| 399 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| 400 | if (ret < 0) { |
| 401 | mutex_unlock(&info->lock); |
| 402 | goto out; |
| 403 | } |
| 404 | if (ret & STATUS2_CHG) { |
| 405 | info->online = 1; |
| 406 | info->allowed = 1; |
| 407 | } else { |
| 408 | info->online = 0; |
| 409 | info->allowed = 0; |
| 410 | } |
| 411 | mutex_unlock(&info->lock); |
| 412 | dev_dbg(info->dev, "%s, Charger:%s, Allowed:%d\n", __func__, |
| 413 | (info->online) ? "online" : "N/A", info->allowed); |
| 414 | |
| 415 | set_charging_fsm(info); |
| 416 | |
| 417 | power_supply_changed(&info->usb); |
| 418 | out: |
| 419 | return IRQ_HANDLED; |
| 420 | } |
| 421 | |
| 422 | static irqreturn_t pm860x_temp_handler(int irq, void *data) |
| 423 | { |
| 424 | struct power_supply *psy; |
| 425 | struct pm860x_charger_info *info = data; |
| 426 | union power_supply_propval temp; |
| 427 | int value; |
| 428 | int ret; |
| 429 | |
| 430 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); |
| 431 | if (!psy) |
| 432 | goto out; |
| 433 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_TEMP, &temp); |
| 434 | if (ret) |
| 435 | goto out; |
| 436 | value = temp.intval / 10; |
| 437 | |
| 438 | mutex_lock(&info->lock); |
| 439 | /* Temperature < -10 C or >40 C, Will not allow charge */ |
| 440 | if (value < -10 || value > 40) |
| 441 | info->allowed = 0; |
| 442 | else |
| 443 | info->allowed = 1; |
| 444 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); |
| 445 | mutex_unlock(&info->lock); |
| 446 | |
| 447 | set_charging_fsm(info); |
| 448 | out: |
| 449 | return IRQ_HANDLED; |
| 450 | } |
| 451 | |
| 452 | static irqreturn_t pm860x_exception_handler(int irq, void *data) |
| 453 | { |
| 454 | struct pm860x_charger_info *info = data; |
| 455 | |
| 456 | mutex_lock(&info->lock); |
| 457 | info->allowed = 0; |
| 458 | mutex_unlock(&info->lock); |
| 459 | dev_dbg(info->dev, "%s, irq: %d\n", __func__, irq); |
| 460 | |
| 461 | set_charging_fsm(info); |
| 462 | return IRQ_HANDLED; |
| 463 | } |
| 464 | |
| 465 | static irqreturn_t pm860x_done_handler(int irq, void *data) |
| 466 | { |
| 467 | struct pm860x_charger_info *info = data; |
| 468 | struct power_supply *psy; |
| 469 | union power_supply_propval val; |
| 470 | int ret; |
| 471 | int vbatt; |
| 472 | |
| 473 | mutex_lock(&info->lock); |
| 474 | /* pre-charge done, will transimit to fast-charge stage */ |
| 475 | if (info->state == FSM_PRECHARGE) { |
| 476 | info->allowed = 1; |
| 477 | goto out; |
| 478 | } |
| 479 | /* |
| 480 | * Fast charge done, delay to read |
| 481 | * the correct status of CHG_DET. |
| 482 | */ |
| 483 | mdelay(5); |
| 484 | info->allowed = 0; |
| 485 | psy = power_supply_get_by_name(pm860x_supplied_to[0]); |
| 486 | if (!psy) |
| 487 | goto out; |
| 488 | ret = psy->get_property(psy, POWER_SUPPLY_PROP_VOLTAGE_NOW, &val); |
| 489 | if (ret) |
| 490 | goto out; |
| 491 | vbatt = val.intval / 1000; |
| 492 | /* |
| 493 | * CHG_DONE interrupt is faster than CHG_DET interrupt when |
| 494 | * plug in/out usb, So we can not rely on info->online, we |
| 495 | * need check pm8607 status register to check usb is online |
| 496 | * or not, then we can decide it is real charge done |
| 497 | * automatically or it is triggered by usb plug out; |
| 498 | */ |
| 499 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| 500 | if (ret < 0) |
| 501 | goto out; |
| 502 | if (vbatt > CHARGE_THRESHOLD && ret & STATUS2_CHG) |
| 503 | psy->set_property(psy, POWER_SUPPLY_PROP_CHARGE_FULL, &val); |
| 504 | |
| 505 | out: |
| 506 | mutex_unlock(&info->lock); |
| 507 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); |
| 508 | set_charging_fsm(info); |
| 509 | |
| 510 | return IRQ_HANDLED; |
| 511 | } |
| 512 | |
| 513 | static irqreturn_t pm860x_vbattery_handler(int irq, void *data) |
| 514 | { |
| 515 | struct pm860x_charger_info *info = data; |
| 516 | |
| 517 | mutex_lock(&info->lock); |
| 518 | |
| 519 | set_vbatt_threshold(info, 0, 0); |
| 520 | |
| 521 | if (info->present && info->online) |
| 522 | info->allowed = 1; |
| 523 | else |
| 524 | info->allowed = 0; |
| 525 | mutex_unlock(&info->lock); |
| 526 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); |
| 527 | |
| 528 | set_charging_fsm(info); |
| 529 | |
| 530 | return IRQ_HANDLED; |
| 531 | } |
| 532 | |
| 533 | static irqreturn_t pm860x_vchg_handler(int irq, void *data) |
| 534 | { |
| 535 | struct pm860x_charger_info *info = data; |
| 536 | int vchg = 0; |
| 537 | |
| 538 | if (info->present) |
| 539 | goto out; |
| 540 | |
| 541 | measure_vchg(info, &vchg); |
| 542 | |
| 543 | mutex_lock(&info->lock); |
| 544 | if (!info->online) { |
| 545 | int status; |
| 546 | /* check if over-temp on pm8606 or not */ |
| 547 | status = pm860x_reg_read(info->i2c_8606, PM8606_FLAGS); |
| 548 | if (status & OVER_TEMP_FLAG) { |
| 549 | /* clear over temp flag and set auto recover */ |
| 550 | pm860x_set_bits(info->i2c_8606, PM8606_FLAGS, |
| 551 | OVER_TEMP_FLAG, OVER_TEMP_FLAG); |
| 552 | pm860x_set_bits(info->i2c_8606, |
| 553 | PM8606_VSYS, |
| 554 | OVTEMP_AUTORECOVER, |
| 555 | OVTEMP_AUTORECOVER); |
| 556 | dev_dbg(info->dev, |
Masanari Iida | 0b1587b | 2013-07-17 04:37:44 +0900 | [diff] [blame] | 557 | "%s, pm8606 over-temp occurred\n", __func__); |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 558 | } |
| 559 | } |
| 560 | |
| 561 | if (vchg > VCHG_NORMAL_CHECK) { |
| 562 | set_vchg_threshold(info, VCHG_OVP_LOW, 0); |
| 563 | info->allowed = 0; |
| 564 | dev_dbg(info->dev, |
Masanari Iida | 0b1587b | 2013-07-17 04:37:44 +0900 | [diff] [blame] | 565 | "%s,pm8607 over-vchg occurred,vchg = %dmv\n", |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 566 | __func__, vchg); |
| 567 | } else if (vchg < VCHG_OVP_LOW) { |
| 568 | set_vchg_threshold(info, VCHG_NORMAL_LOW, |
| 569 | VCHG_NORMAL_HIGH); |
| 570 | info->allowed = 1; |
| 571 | dev_dbg(info->dev, |
| 572 | "%s,pm8607 over-vchg recover,vchg = %dmv\n", |
| 573 | __func__, vchg); |
| 574 | } |
| 575 | mutex_unlock(&info->lock); |
| 576 | |
| 577 | dev_dbg(info->dev, "%s, Allowed: %d\n", __func__, info->allowed); |
| 578 | set_charging_fsm(info); |
| 579 | out: |
| 580 | return IRQ_HANDLED; |
| 581 | } |
| 582 | |
| 583 | static int pm860x_usb_get_prop(struct power_supply *psy, |
| 584 | enum power_supply_property psp, |
| 585 | union power_supply_propval *val) |
| 586 | { |
| 587 | struct pm860x_charger_info *info = |
| 588 | dev_get_drvdata(psy->dev->parent); |
| 589 | |
| 590 | switch (psp) { |
| 591 | case POWER_SUPPLY_PROP_STATUS: |
| 592 | if (info->state == FSM_FASTCHARGE || |
| 593 | info->state == FSM_PRECHARGE) |
| 594 | val->intval = POWER_SUPPLY_STATUS_CHARGING; |
| 595 | else |
| 596 | val->intval = POWER_SUPPLY_STATUS_DISCHARGING; |
| 597 | break; |
| 598 | case POWER_SUPPLY_PROP_ONLINE: |
| 599 | val->intval = info->online; |
| 600 | break; |
| 601 | default: |
| 602 | return -ENODEV; |
| 603 | } |
| 604 | return 0; |
| 605 | } |
| 606 | |
| 607 | static enum power_supply_property pm860x_usb_props[] = { |
| 608 | POWER_SUPPLY_PROP_STATUS, |
| 609 | POWER_SUPPLY_PROP_ONLINE, |
| 610 | }; |
| 611 | |
| 612 | static int pm860x_init_charger(struct pm860x_charger_info *info) |
| 613 | { |
| 614 | int ret; |
| 615 | |
| 616 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| 617 | if (ret < 0) |
| 618 | return ret; |
| 619 | |
| 620 | mutex_lock(&info->lock); |
| 621 | info->state = FSM_INIT; |
| 622 | if (ret & STATUS2_CHG) { |
| 623 | info->online = 1; |
| 624 | info->allowed = 1; |
| 625 | } else { |
| 626 | info->online = 0; |
| 627 | info->allowed = 0; |
| 628 | } |
| 629 | mutex_unlock(&info->lock); |
| 630 | |
| 631 | set_charging_fsm(info); |
| 632 | return 0; |
| 633 | } |
| 634 | |
Anton Vorontsov | f1ade35 | 2012-08-22 20:31:33 -0700 | [diff] [blame] | 635 | static struct pm860x_irq_desc { |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 636 | const char *name; |
| 637 | irqreturn_t (*handler)(int irq, void *data); |
| 638 | } pm860x_irq_descs[] = { |
| 639 | { "usb supply detect", pm860x_charger_handler }, |
| 640 | { "charge done", pm860x_done_handler }, |
| 641 | { "charge timeout", pm860x_exception_handler }, |
| 642 | { "charge fault", pm860x_exception_handler }, |
| 643 | { "temperature", pm860x_temp_handler }, |
| 644 | { "vbatt", pm860x_vbattery_handler }, |
| 645 | { "vchg", pm860x_vchg_handler }, |
| 646 | }; |
| 647 | |
Bill Pemberton | c8afa64 | 2012-11-19 13:22:23 -0500 | [diff] [blame] | 648 | static int pm860x_charger_probe(struct platform_device *pdev) |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 649 | { |
| 650 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| 651 | struct pm860x_charger_info *info; |
| 652 | int ret; |
| 653 | int count; |
| 654 | int i; |
| 655 | int j; |
| 656 | |
| 657 | info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL); |
| 658 | if (!info) |
| 659 | return -ENOMEM; |
| 660 | |
| 661 | count = pdev->num_resources; |
| 662 | for (i = 0, j = 0; i < count; i++) { |
| 663 | info->irq[j] = platform_get_irq(pdev, i); |
| 664 | if (info->irq[j] < 0) |
| 665 | continue; |
| 666 | j++; |
| 667 | } |
| 668 | info->irq_nums = j; |
| 669 | |
| 670 | info->chip = chip; |
| 671 | info->i2c = |
| 672 | (chip->id == CHIP_PM8607) ? chip->client : chip->companion; |
| 673 | info->i2c_8606 = |
| 674 | (chip->id == CHIP_PM8607) ? chip->companion : chip->client; |
| 675 | if (!info->i2c_8606) { |
| 676 | dev_err(&pdev->dev, "Missed I2C address of 88PM8606!\n"); |
| 677 | ret = -EINVAL; |
| 678 | goto out; |
| 679 | } |
| 680 | info->dev = &pdev->dev; |
| 681 | |
| 682 | /* set init value for the case we are not using battery */ |
| 683 | set_vchg_threshold(info, VCHG_NORMAL_LOW, VCHG_OVP_LOW); |
| 684 | |
| 685 | mutex_init(&info->lock); |
| 686 | platform_set_drvdata(pdev, info); |
| 687 | |
| 688 | info->usb.name = "usb"; |
| 689 | info->usb.type = POWER_SUPPLY_TYPE_USB; |
| 690 | info->usb.supplied_to = pm860x_supplied_to; |
| 691 | info->usb.num_supplicants = ARRAY_SIZE(pm860x_supplied_to); |
| 692 | info->usb.properties = pm860x_usb_props; |
| 693 | info->usb.num_properties = ARRAY_SIZE(pm860x_usb_props); |
| 694 | info->usb.get_property = pm860x_usb_get_prop; |
| 695 | ret = power_supply_register(&pdev->dev, &info->usb); |
| 696 | if (ret) |
| 697 | goto out; |
| 698 | |
| 699 | pm860x_init_charger(info); |
| 700 | |
| 701 | for (i = 0; i < ARRAY_SIZE(info->irq); i++) { |
| 702 | ret = request_threaded_irq(info->irq[i], NULL, |
| 703 | pm860x_irq_descs[i].handler, |
| 704 | IRQF_ONESHOT, pm860x_irq_descs[i].name, info); |
| 705 | if (ret < 0) { |
| 706 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", |
| 707 | info->irq[i], ret); |
| 708 | goto out_irq; |
| 709 | } |
| 710 | } |
| 711 | return 0; |
| 712 | |
| 713 | out_irq: |
Krzysztof Kozlowski | 24727b4 | 2015-01-27 16:51:54 +0100 | [diff] [blame] | 714 | power_supply_unregister(&info->usb); |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 715 | while (--i >= 0) |
| 716 | free_irq(info->irq[i], info); |
| 717 | out: |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 718 | return ret; |
| 719 | } |
| 720 | |
Bill Pemberton | 415ec69 | 2012-11-19 13:26:07 -0500 | [diff] [blame] | 721 | static int pm860x_charger_remove(struct platform_device *pdev) |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 722 | { |
| 723 | struct pm860x_charger_info *info = platform_get_drvdata(pdev); |
| 724 | int i; |
| 725 | |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 726 | power_supply_unregister(&info->usb); |
| 727 | free_irq(info->irq[0], info); |
| 728 | for (i = 0; i < info->irq_nums; i++) |
| 729 | free_irq(info->irq[i], info); |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | static struct platform_driver pm860x_charger_driver = { |
| 734 | .driver = { |
| 735 | .name = "88pm860x-charger", |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 736 | }, |
| 737 | .probe = pm860x_charger_probe, |
Bill Pemberton | 28ea73f | 2012-11-19 13:20:40 -0500 | [diff] [blame] | 738 | .remove = pm860x_charger_remove, |
Jett.Zhou | a830d28 | 2012-07-27 16:27:16 +0800 | [diff] [blame] | 739 | }; |
| 740 | module_platform_driver(pm860x_charger_driver); |
| 741 | |
| 742 | MODULE_DESCRIPTION("Marvell 88PM860x Charger driver"); |
| 743 | MODULE_LICENSE("GPL"); |