1 /* 2 * tps65010 - driver for tps6501x power management chips 3 * 4 * Copyright (C) 2004 Texas Instruments 5 * Copyright (C) 2004-2005 David Brownell 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #include <linux/kernel.h> 23 #include <linux/module.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/interrupt.h> 27 #include <linux/i2c.h> 28 #include <linux/delay.h> 29 #include <linux/workqueue.h> 30 #include <linux/debugfs.h> 31 #include <linux/seq_file.h> 32 #include <linux/mutex.h> 33 #include <linux/platform_device.h> 34 35 #include <linux/i2c/tps65010.h> 36 37 #include <linux/gpio.h> 38 39 40 /*-------------------------------------------------------------------------*/ 41 42 #define DRIVER_VERSION "2 May 2005" 43 #define DRIVER_NAME (tps65010_driver.driver.name) 44 45 MODULE_DESCRIPTION("TPS6501x Power Management Driver"); 46 MODULE_LICENSE("GPL"); 47 48 static struct i2c_driver tps65010_driver; 49 50 /*-------------------------------------------------------------------------*/ 51 52 /* This driver handles a family of multipurpose chips, which incorporate 53 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs, 54 * and other features often needed in portable devices like cell phones 55 * or digital cameras. 56 * 57 * The tps65011 and tps65013 have different voltage settings compared 58 * to tps65010 and tps65012. The tps65013 has a NO_CHG status/irq. 59 * All except tps65010 have "wait" mode, possibly defaulted so that 60 * battery-insert != device-on. 61 * 62 * We could distinguish between some models by checking VDCDC1.UVLO or 63 * other registers, unless they've been changed already after powerup 64 * as part of board setup by a bootloader. 65 */ 66 enum tps_model { 67 TPS65010, 68 TPS65011, 69 TPS65012, 70 TPS65013, 71 }; 72 73 struct tps65010 { 74 struct i2c_client *client; 75 struct mutex lock; 76 struct delayed_work work; 77 struct dentry *file; 78 unsigned charging:1; 79 unsigned por:1; 80 unsigned model:8; 81 u16 vbus; 82 unsigned long flags; 83 #define FLAG_VBUS_CHANGED 0 84 #define FLAG_IRQ_ENABLE 1 85 86 /* copies of last register state */ 87 u8 chgstatus, regstatus, chgconf; 88 u8 nmask1, nmask2; 89 90 u8 outmask; 91 struct gpio_chip chip; 92 struct platform_device *leds; 93 }; 94 95 #define POWER_POLL_DELAY msecs_to_jiffies(5000) 96 97 /*-------------------------------------------------------------------------*/ 98 99 #if defined(DEBUG) || defined(CONFIG_DEBUG_FS) 100 101 static void dbg_chgstat(char *buf, size_t len, u8 chgstatus) 102 { 103 snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n", 104 chgstatus, 105 (chgstatus & TPS_CHG_USB) ? " USB" : "", 106 (chgstatus & TPS_CHG_AC) ? " AC" : "", 107 (chgstatus & TPS_CHG_THERM) ? " therm" : "", 108 (chgstatus & TPS_CHG_TERM) ? " done" : 109 ((chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) 110 ? " (charging)" : ""), 111 (chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "", 112 (chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "", 113 (chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "", 114 (chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : ""); 115 } 116 117 static void dbg_regstat(char *buf, size_t len, u8 regstatus) 118 { 119 snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n", 120 regstatus, 121 (regstatus & TPS_REG_ONOFF) ? "off" : "(on)", 122 (regstatus & TPS_REG_COVER) ? " uncover" : "", 123 (regstatus & TPS_REG_UVLO) ? " UVLO" : "", 124 (regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "", 125 (regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "", 126 (regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "", 127 (regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "", 128 (regstatus & TPS_REG_PG_CORE) ? " core_bad" : ""); 129 } 130 131 static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig) 132 { 133 const char *hibit; 134 135 if (por) 136 hibit = (chgconfig & TPS_CHARGE_POR) 137 ? "POR=69ms" : "POR=1sec"; 138 else 139 hibit = (chgconfig & TPS65013_AUA) ? "AUA" : ""; 140 141 snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n", 142 chgconfig, hibit, 143 (chgconfig & TPS_CHARGE_RESET) ? " reset" : "", 144 (chgconfig & TPS_CHARGE_FAST) ? " fast" : "", 145 ({int p; switch ((chgconfig >> 3) & 3) { 146 case 3: p = 100; break; 147 case 2: p = 75; break; 148 case 1: p = 50; break; 149 default: p = 25; break; 150 }; p; }), 151 (chgconfig & TPS_VBUS_CHARGING) 152 ? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100) 153 : 0, 154 (chgconfig & TPS_CHARGE_ENABLE) ? "" : "No"); 155 } 156 157 #endif 158 159 #ifdef DEBUG 160 161 static void show_chgstatus(const char *label, u8 chgstatus) 162 { 163 char buf [100]; 164 165 dbg_chgstat(buf, sizeof buf, chgstatus); 166 pr_debug("%s: %s %s", DRIVER_NAME, label, buf); 167 } 168 169 static void show_regstatus(const char *label, u8 regstatus) 170 { 171 char buf [100]; 172 173 dbg_regstat(buf, sizeof buf, regstatus); 174 pr_debug("%s: %s %s", DRIVER_NAME, label, buf); 175 } 176 177 static void show_chgconfig(int por, const char *label, u8 chgconfig) 178 { 179 char buf [100]; 180 181 dbg_chgconf(por, buf, sizeof buf, chgconfig); 182 pr_debug("%s: %s %s", DRIVER_NAME, label, buf); 183 } 184 185 #else 186 187 static inline void show_chgstatus(const char *label, u8 chgstatus) { } 188 static inline void show_regstatus(const char *label, u8 chgstatus) { } 189 static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { } 190 191 #endif 192 193 #ifdef CONFIG_DEBUG_FS 194 195 static int dbg_show(struct seq_file *s, void *_) 196 { 197 struct tps65010 *tps = s->private; 198 u8 value, v2; 199 unsigned i; 200 char buf[100]; 201 const char *chip; 202 203 switch (tps->model) { 204 case TPS65010: chip = "tps65010"; break; 205 case TPS65011: chip = "tps65011"; break; 206 case TPS65012: chip = "tps65012"; break; 207 case TPS65013: chip = "tps65013"; break; 208 default: chip = NULL; break; 209 } 210 seq_printf(s, "driver %s\nversion %s\nchip %s\n\n", 211 DRIVER_NAME, DRIVER_VERSION, chip); 212 213 mutex_lock(&tps->lock); 214 215 /* FIXME how can we tell whether a battery is present? 216 * likely involves a charge gauging chip (like BQ26501). 217 */ 218 219 seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) "); 220 221 222 /* registers for monitoring battery charging and status; note 223 * that reading chgstat and regstat may ack IRQs... 224 */ 225 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); 226 dbg_chgconf(tps->por, buf, sizeof buf, value); 227 seq_printf(s, "chgconfig %s", buf); 228 229 value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); 230 dbg_chgstat(buf, sizeof buf, value); 231 seq_printf(s, "chgstat %s", buf); 232 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1); 233 dbg_chgstat(buf, sizeof buf, value); 234 seq_printf(s, "mask1 %s", buf); 235 /* ignore ackint1 */ 236 237 value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); 238 dbg_regstat(buf, sizeof buf, value); 239 seq_printf(s, "regstat %s", buf); 240 value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2); 241 dbg_regstat(buf, sizeof buf, value); 242 seq_printf(s, "mask2 %s\n", buf); 243 /* ignore ackint2 */ 244 245 queue_delayed_work(system_power_efficient_wq, &tps->work, 246 POWER_POLL_DELAY); 247 248 /* VMAIN voltage, enable lowpower, etc */ 249 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1); 250 seq_printf(s, "vdcdc1 %02x\n", value); 251 252 /* VCORE voltage, vibrator on/off */ 253 value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2); 254 seq_printf(s, "vdcdc2 %02x\n", value); 255 256 /* both LD0s, and their lowpower behavior */ 257 value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1); 258 seq_printf(s, "vregs1 %02x\n\n", value); 259 260 261 /* LEDs and GPIOs */ 262 value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON); 263 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER); 264 seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n", 265 (value & 0x80) 266 ? ((v2 & 0x80) ? "on" : "off") 267 : ((v2 & 0x80) ? "blink" : "(nPG)"), 268 value, v2, 269 (value & 0x7f) * 10, (v2 & 0x7f) * 100); 270 271 value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON); 272 v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER); 273 seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n", 274 (value & 0x80) 275 ? ((v2 & 0x80) ? "on" : "off") 276 : ((v2 & 0x80) ? "blink" : "off"), 277 value, v2, 278 (value & 0x7f) * 10, (v2 & 0x7f) * 100); 279 280 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); 281 v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3); 282 seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2); 283 284 for (i = 0; i < 4; i++) { 285 if (value & (1 << (4 + i))) 286 seq_printf(s, " gpio%d-out %s\n", i + 1, 287 (value & (1 << i)) ? "low" : "hi "); 288 else 289 seq_printf(s, " gpio%d-in %s %s %s\n", i + 1, 290 (value & (1 << i)) ? "hi " : "low", 291 (v2 & (1 << i)) ? "no-irq" : "irq", 292 (v2 & (1 << (4 + i))) ? "rising" : "falling"); 293 } 294 295 mutex_unlock(&tps->lock); 296 return 0; 297 } 298 299 static int dbg_tps_open(struct inode *inode, struct file *file) 300 { 301 return single_open(file, dbg_show, inode->i_private); 302 } 303 304 static const struct file_operations debug_fops = { 305 .open = dbg_tps_open, 306 .read = seq_read, 307 .llseek = seq_lseek, 308 .release = single_release, 309 }; 310 311 #define DEBUG_FOPS &debug_fops 312 313 #else 314 #define DEBUG_FOPS NULL 315 #endif 316 317 /*-------------------------------------------------------------------------*/ 318 319 /* handle IRQS in a task context, so we can use I2C calls */ 320 static void tps65010_interrupt(struct tps65010 *tps) 321 { 322 u8 tmp = 0, mask, poll; 323 324 /* IRQs won't trigger for certain events, but we can get 325 * others by polling (normally, with external power applied). 326 */ 327 poll = 0; 328 329 /* regstatus irqs */ 330 if (tps->nmask2) { 331 tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS); 332 mask = tmp ^ tps->regstatus; 333 tps->regstatus = tmp; 334 mask &= tps->nmask2; 335 } else 336 mask = 0; 337 if (mask) { 338 tps->regstatus = tmp; 339 /* may need to shut something down ... */ 340 341 /* "off" usually means deep sleep */ 342 if (tmp & TPS_REG_ONOFF) { 343 pr_info("%s: power off button\n", DRIVER_NAME); 344 #if 0 345 /* REVISIT: this might need its own workqueue 346 * plus tweaks including deadlock avoidance ... 347 * also needs to get error handling and probably 348 * an #ifdef CONFIG_HIBERNATION 349 */ 350 hibernate(); 351 #endif 352 poll = 1; 353 } 354 } 355 356 /* chgstatus irqs */ 357 if (tps->nmask1) { 358 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS); 359 mask = tmp ^ tps->chgstatus; 360 tps->chgstatus = tmp; 361 mask &= tps->nmask1; 362 } else 363 mask = 0; 364 if (mask) { 365 unsigned charging = 0; 366 367 show_chgstatus("chg/irq", tmp); 368 if (tmp & (TPS_CHG_USB|TPS_CHG_AC)) 369 show_chgconfig(tps->por, "conf", tps->chgconf); 370 371 /* Unless it was turned off or disabled, we charge any 372 * battery whenever there's power available for it 373 * and the charger hasn't been disabled. 374 */ 375 if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC)) 376 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) 377 && (tps->chgconf & TPS_CHARGE_ENABLE) 378 ) { 379 if (tps->chgstatus & TPS_CHG_USB) { 380 /* VBUS options are readonly until reconnect */ 381 if (mask & TPS_CHG_USB) 382 set_bit(FLAG_VBUS_CHANGED, &tps->flags); 383 charging = 1; 384 } else if (tps->chgstatus & TPS_CHG_AC) 385 charging = 1; 386 } 387 if (charging != tps->charging) { 388 tps->charging = charging; 389 pr_info("%s: battery %scharging\n", 390 DRIVER_NAME, charging ? "" : 391 ((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)) 392 ? "NOT " : "dis")); 393 } 394 } 395 396 /* always poll to detect (a) power removal, without tps65013 397 * NO_CHG IRQ; or (b) restart of charging after stop. 398 */ 399 if ((tps->model != TPS65013 || !tps->charging) 400 && (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))) 401 poll = 1; 402 if (poll) 403 queue_delayed_work(system_power_efficient_wq, &tps->work, 404 POWER_POLL_DELAY); 405 406 /* also potentially gpio-in rise or fall */ 407 } 408 409 /* handle IRQs and polling using keventd for now */ 410 static void tps65010_work(struct work_struct *work) 411 { 412 struct tps65010 *tps; 413 414 tps = container_of(to_delayed_work(work), struct tps65010, work); 415 mutex_lock(&tps->lock); 416 417 tps65010_interrupt(tps); 418 419 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { 420 int status; 421 u8 chgconfig, tmp; 422 423 chgconfig = i2c_smbus_read_byte_data(tps->client, 424 TPS_CHGCONFIG); 425 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); 426 if (tps->vbus == 500) 427 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; 428 else if (tps->vbus >= 100) 429 chgconfig |= TPS_VBUS_CHARGING; 430 431 status = i2c_smbus_write_byte_data(tps->client, 432 TPS_CHGCONFIG, chgconfig); 433 434 /* vbus update fails unless VBUS is connected! */ 435 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); 436 tps->chgconf = tmp; 437 show_chgconfig(tps->por, "update vbus", tmp); 438 } 439 440 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) 441 enable_irq(tps->client->irq); 442 443 mutex_unlock(&tps->lock); 444 } 445 446 static irqreturn_t tps65010_irq(int irq, void *_tps) 447 { 448 struct tps65010 *tps = _tps; 449 450 disable_irq_nosync(irq); 451 set_bit(FLAG_IRQ_ENABLE, &tps->flags); 452 queue_delayed_work(system_power_efficient_wq, &tps->work, 0); 453 return IRQ_HANDLED; 454 } 455 456 /*-------------------------------------------------------------------------*/ 457 458 /* offsets 0..3 == GPIO1..GPIO4 459 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) 460 * offset 6 == vibrator motor driver 461 */ 462 static void 463 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 464 { 465 if (offset < 4) 466 tps65010_set_gpio_out_value(offset + 1, value); 467 else if (offset < 6) 468 tps65010_set_led(offset - 3, value ? ON : OFF); 469 else 470 tps65010_set_vib(value); 471 } 472 473 static int 474 tps65010_output(struct gpio_chip *chip, unsigned offset, int value) 475 { 476 /* GPIOs may be input-only */ 477 if (offset < 4) { 478 struct tps65010 *tps; 479 480 tps = container_of(chip, struct tps65010, chip); 481 if (!(tps->outmask & (1 << offset))) 482 return -EINVAL; 483 tps65010_set_gpio_out_value(offset + 1, value); 484 } else if (offset < 6) 485 tps65010_set_led(offset - 3, value ? ON : OFF); 486 else 487 tps65010_set_vib(value); 488 489 return 0; 490 } 491 492 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) 493 { 494 int value; 495 struct tps65010 *tps; 496 497 tps = container_of(chip, struct tps65010, chip); 498 499 if (offset < 4) { 500 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); 501 if (value < 0) 502 return 0; 503 if (value & (1 << (offset + 4))) /* output */ 504 return !(value & (1 << offset)); 505 else /* input */ 506 return (value & (1 << offset)); 507 } 508 509 /* REVISIT we *could* report LED1/nPG and LED2 state ... */ 510 return 0; 511 } 512 513 514 /*-------------------------------------------------------------------------*/ 515 516 static struct tps65010 *the_tps; 517 518 static int tps65010_remove(struct i2c_client *client) 519 { 520 struct tps65010 *tps = i2c_get_clientdata(client); 521 struct tps65010_board *board = dev_get_platdata(&client->dev); 522 523 if (board && board->teardown) { 524 int status = board->teardown(client, board->context); 525 if (status < 0) 526 dev_dbg(&client->dev, "board %s %s err %d\n", 527 "teardown", client->name, status); 528 } 529 if (client->irq > 0) 530 free_irq(client->irq, tps); 531 cancel_delayed_work_sync(&tps->work); 532 debugfs_remove(tps->file); 533 the_tps = NULL; 534 return 0; 535 } 536 537 static int tps65010_probe(struct i2c_client *client, 538 const struct i2c_device_id *id) 539 { 540 struct tps65010 *tps; 541 int status; 542 struct tps65010_board *board = dev_get_platdata(&client->dev); 543 544 if (the_tps) { 545 dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); 546 return -ENODEV; 547 } 548 549 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 550 return -EINVAL; 551 552 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL); 553 if (!tps) 554 return -ENOMEM; 555 556 mutex_init(&tps->lock); 557 INIT_DELAYED_WORK(&tps->work, tps65010_work); 558 tps->client = client; 559 tps->model = id->driver_data; 560 561 /* the IRQ is active low, but many gpio lines can't support that 562 * so this driver uses falling-edge triggers instead. 563 */ 564 if (client->irq > 0) { 565 status = request_irq(client->irq, tps65010_irq, 566 IRQF_TRIGGER_FALLING, DRIVER_NAME, tps); 567 if (status < 0) { 568 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", 569 client->irq, status); 570 return status; 571 } 572 /* annoying race here, ideally we'd have an option 573 * to claim the irq now and enable it later. 574 * FIXME genirq IRQF_NOAUTOEN now solves that ... 575 */ 576 disable_irq(client->irq); 577 set_bit(FLAG_IRQ_ENABLE, &tps->flags); 578 } else 579 dev_warn(&client->dev, "IRQ not configured!\n"); 580 581 582 switch (tps->model) { 583 case TPS65010: 584 case TPS65012: 585 tps->por = 1; 586 break; 587 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ 588 } 589 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); 590 show_chgconfig(tps->por, "conf/init", tps->chgconf); 591 592 show_chgstatus("chg/init", 593 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); 594 show_regstatus("reg/init", 595 i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); 596 597 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, 598 i2c_smbus_read_byte_data(client, TPS_VDCDC1), 599 i2c_smbus_read_byte_data(client, TPS_VDCDC2), 600 i2c_smbus_read_byte_data(client, TPS_VREGS1)); 601 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, 602 i2c_smbus_read_byte_data(client, TPS_DEFGPIO), 603 i2c_smbus_read_byte_data(client, TPS_MASK3)); 604 605 i2c_set_clientdata(client, tps); 606 the_tps = tps; 607 608 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) 609 /* USB hosts can't draw VBUS. OTG devices could, later 610 * when OTG infrastructure enables it. USB peripherals 611 * could be relying on VBUS while booting, though. 612 */ 613 tps->vbus = 100; 614 #endif 615 616 /* unmask the "interesting" irqs, then poll once to 617 * kickstart monitoring, initialize shadowed status 618 * registers, and maybe disable VBUS draw. 619 */ 620 tps->nmask1 = ~0; 621 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); 622 623 tps->nmask2 = TPS_REG_ONOFF; 624 if (tps->model == TPS65013) 625 tps->nmask2 |= TPS_REG_NO_CHG; 626 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); 627 628 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f 629 | i2c_smbus_read_byte_data(client, TPS_MASK3)); 630 631 tps65010_work(&tps->work.work); 632 633 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, 634 tps, DEBUG_FOPS); 635 636 /* optionally register GPIOs */ 637 if (board && board->base != 0) { 638 tps->outmask = board->outmask; 639 640 tps->chip.label = client->name; 641 tps->chip.dev = &client->dev; 642 tps->chip.owner = THIS_MODULE; 643 644 tps->chip.set = tps65010_gpio_set; 645 tps->chip.direction_output = tps65010_output; 646 647 /* NOTE: only partial support for inputs; nyet IRQs */ 648 tps->chip.get = tps65010_gpio_get; 649 650 tps->chip.base = board->base; 651 tps->chip.ngpio = 7; 652 tps->chip.can_sleep = 1; 653 654 status = gpiochip_add(&tps->chip); 655 if (status < 0) 656 dev_err(&client->dev, "can't add gpiochip, err %d\n", 657 status); 658 else if (board->setup) { 659 status = board->setup(client, board->context); 660 if (status < 0) { 661 dev_dbg(&client->dev, 662 "board %s %s err %d\n", 663 "setup", client->name, status); 664 status = 0; 665 } 666 } 667 } 668 669 return 0; 670 } 671 672 static const struct i2c_device_id tps65010_id[] = { 673 { "tps65010", TPS65010 }, 674 { "tps65011", TPS65011 }, 675 { "tps65012", TPS65012 }, 676 { "tps65013", TPS65013 }, 677 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ 678 { } 679 }; 680 MODULE_DEVICE_TABLE(i2c, tps65010_id); 681 682 static struct i2c_driver tps65010_driver = { 683 .driver = { 684 .name = "tps65010", 685 }, 686 .probe = tps65010_probe, 687 .remove = tps65010_remove, 688 .id_table = tps65010_id, 689 }; 690 691 /*-------------------------------------------------------------------------*/ 692 693 /* Draw from VBUS: 694 * 0 mA -- DON'T DRAW (might supply power instead) 695 * 100 mA -- usb unit load (slowest charge rate) 696 * 500 mA -- usb high power (fast battery charge) 697 */ 698 int tps65010_set_vbus_draw(unsigned mA) 699 { 700 unsigned long flags; 701 702 if (!the_tps) 703 return -ENODEV; 704 705 /* assumes non-SMP */ 706 local_irq_save(flags); 707 if (mA >= 500) 708 mA = 500; 709 else if (mA >= 100) 710 mA = 100; 711 else 712 mA = 0; 713 the_tps->vbus = mA; 714 if ((the_tps->chgstatus & TPS_CHG_USB) 715 && test_and_set_bit( 716 FLAG_VBUS_CHANGED, &the_tps->flags)) { 717 /* gadget drivers call this in_irq() */ 718 queue_delayed_work(system_power_efficient_wq, &the_tps->work, 719 0); 720 } 721 local_irq_restore(flags); 722 723 return 0; 724 } 725 EXPORT_SYMBOL(tps65010_set_vbus_draw); 726 727 /*-------------------------------------------------------------------------*/ 728 /* tps65010_set_gpio_out_value parameter: 729 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 730 * value: LOW or HIGH 731 */ 732 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) 733 { 734 int status; 735 unsigned defgpio; 736 737 if (!the_tps) 738 return -ENODEV; 739 if ((gpio < GPIO1) || (gpio > GPIO4)) 740 return -EINVAL; 741 742 mutex_lock(&the_tps->lock); 743 744 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); 745 746 /* Configure GPIO for output */ 747 defgpio |= 1 << (gpio + 3); 748 749 /* Writing 1 forces a logic 0 on that GPIO and vice versa */ 750 switch (value) { 751 case LOW: 752 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ 753 break; 754 /* case HIGH: */ 755 default: 756 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ 757 break; 758 } 759 760 status = i2c_smbus_write_byte_data(the_tps->client, 761 TPS_DEFGPIO, defgpio); 762 763 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, 764 gpio, value ? "high" : "low", 765 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); 766 767 mutex_unlock(&the_tps->lock); 768 return status; 769 } 770 EXPORT_SYMBOL(tps65010_set_gpio_out_value); 771 772 /*-------------------------------------------------------------------------*/ 773 /* tps65010_set_led parameter: 774 * led: LED1 or LED2 775 * mode: ON, OFF or BLINK 776 */ 777 int tps65010_set_led(unsigned led, unsigned mode) 778 { 779 int status; 780 unsigned led_on, led_per, offs; 781 782 if (!the_tps) 783 return -ENODEV; 784 785 if (led == LED1) 786 offs = 0; 787 else { 788 offs = 2; 789 led = LED2; 790 } 791 792 mutex_lock(&the_tps->lock); 793 794 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 795 i2c_smbus_read_byte_data(the_tps->client, 796 TPS_LED1_ON + offs)); 797 798 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 799 i2c_smbus_read_byte_data(the_tps->client, 800 TPS_LED1_PER + offs)); 801 802 switch (mode) { 803 case OFF: 804 led_on = 1 << 7; 805 led_per = 0 << 7; 806 break; 807 case ON: 808 led_on = 1 << 7; 809 led_per = 1 << 7; 810 break; 811 case BLINK: 812 led_on = 0x30 | (0 << 7); 813 led_per = 0x08 | (1 << 7); 814 break; 815 default: 816 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", 817 DRIVER_NAME); 818 mutex_unlock(&the_tps->lock); 819 return -EINVAL; 820 } 821 822 status = i2c_smbus_write_byte_data(the_tps->client, 823 TPS_LED1_ON + offs, led_on); 824 825 if (status != 0) { 826 printk(KERN_ERR "%s: Failed to write led%i_on register\n", 827 DRIVER_NAME, led); 828 mutex_unlock(&the_tps->lock); 829 return status; 830 } 831 832 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 833 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); 834 835 status = i2c_smbus_write_byte_data(the_tps->client, 836 TPS_LED1_PER + offs, led_per); 837 838 if (status != 0) { 839 printk(KERN_ERR "%s: Failed to write led%i_per register\n", 840 DRIVER_NAME, led); 841 mutex_unlock(&the_tps->lock); 842 return status; 843 } 844 845 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 846 i2c_smbus_read_byte_data(the_tps->client, 847 TPS_LED1_PER + offs)); 848 849 mutex_unlock(&the_tps->lock); 850 851 return status; 852 } 853 EXPORT_SYMBOL(tps65010_set_led); 854 855 /*-------------------------------------------------------------------------*/ 856 /* tps65010_set_vib parameter: 857 * value: ON or OFF 858 */ 859 int tps65010_set_vib(unsigned value) 860 { 861 int status; 862 unsigned vdcdc2; 863 864 if (!the_tps) 865 return -ENODEV; 866 867 mutex_lock(&the_tps->lock); 868 869 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); 870 vdcdc2 &= ~(1 << 1); 871 if (value) 872 vdcdc2 |= (1 << 1); 873 status = i2c_smbus_write_byte_data(the_tps->client, 874 TPS_VDCDC2, vdcdc2); 875 876 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); 877 878 mutex_unlock(&the_tps->lock); 879 return status; 880 } 881 EXPORT_SYMBOL(tps65010_set_vib); 882 883 /*-------------------------------------------------------------------------*/ 884 /* tps65010_set_low_pwr parameter: 885 * mode: ON or OFF 886 */ 887 int tps65010_set_low_pwr(unsigned mode) 888 { 889 int status; 890 unsigned vdcdc1; 891 892 if (!the_tps) 893 return -ENODEV; 894 895 mutex_lock(&the_tps->lock); 896 897 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, 898 mode ? "enable" : "disable", 899 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 900 901 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 902 903 switch (mode) { 904 case OFF: 905 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 906 break; 907 /* case ON: */ 908 default: 909 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 910 break; 911 } 912 913 status = i2c_smbus_write_byte_data(the_tps->client, 914 TPS_VDCDC1, vdcdc1); 915 916 if (status != 0) 917 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 918 DRIVER_NAME); 919 else 920 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 921 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 922 923 mutex_unlock(&the_tps->lock); 924 925 return status; 926 } 927 EXPORT_SYMBOL(tps65010_set_low_pwr); 928 929 /*-------------------------------------------------------------------------*/ 930 /* tps65010_config_vregs1 parameter: 931 * value to be written to VREGS1 register 932 * Note: The complete register is written, set all bits you need 933 */ 934 int tps65010_config_vregs1(unsigned value) 935 { 936 int status; 937 938 if (!the_tps) 939 return -ENODEV; 940 941 mutex_lock(&the_tps->lock); 942 943 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 944 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 945 946 status = i2c_smbus_write_byte_data(the_tps->client, 947 TPS_VREGS1, value); 948 949 if (status != 0) 950 printk(KERN_ERR "%s: Failed to write vregs1 register\n", 951 DRIVER_NAME); 952 else 953 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 954 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 955 956 mutex_unlock(&the_tps->lock); 957 958 return status; 959 } 960 EXPORT_SYMBOL(tps65010_config_vregs1); 961 962 int tps65010_config_vdcdc2(unsigned value) 963 { 964 struct i2c_client *c; 965 int status; 966 967 if (!the_tps) 968 return -ENODEV; 969 970 c = the_tps->client; 971 mutex_lock(&the_tps->lock); 972 973 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME, 974 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 975 976 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value); 977 978 if (status != 0) 979 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n", 980 DRIVER_NAME); 981 else 982 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 983 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 984 985 mutex_unlock(&the_tps->lock); 986 return status; 987 } 988 EXPORT_SYMBOL(tps65010_config_vdcdc2); 989 990 /*-------------------------------------------------------------------------*/ 991 /* tps65013_set_low_pwr parameter: 992 * mode: ON or OFF 993 */ 994 995 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not 996 required if power supply is through a battery */ 997 998 int tps65013_set_low_pwr(unsigned mode) 999 { 1000 int status; 1001 unsigned vdcdc1, chgconfig; 1002 1003 if (!the_tps || the_tps->por) 1004 return -ENODEV; 1005 1006 mutex_lock(&the_tps->lock); 1007 1008 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", 1009 DRIVER_NAME, 1010 mode ? "enable" : "disable", 1011 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), 1012 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 1013 1014 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 1015 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 1016 1017 switch (mode) { 1018 case OFF: 1019 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ 1020 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 1021 break; 1022 /* case ON: */ 1023 default: 1024 chgconfig |= TPS65013_AUA; /* enable AUA bit */ 1025 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 1026 break; 1027 } 1028 1029 status = i2c_smbus_write_byte_data(the_tps->client, 1030 TPS_CHGCONFIG, chgconfig); 1031 if (status != 0) { 1032 printk(KERN_ERR "%s: Failed to write chconfig register\n", 1033 DRIVER_NAME); 1034 mutex_unlock(&the_tps->lock); 1035 return status; 1036 } 1037 1038 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 1039 the_tps->chgconf = chgconfig; 1040 show_chgconfig(0, "chgconf", chgconfig); 1041 1042 status = i2c_smbus_write_byte_data(the_tps->client, 1043 TPS_VDCDC1, vdcdc1); 1044 1045 if (status != 0) 1046 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 1047 DRIVER_NAME); 1048 else 1049 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 1050 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 1051 1052 mutex_unlock(&the_tps->lock); 1053 1054 return status; 1055 } 1056 EXPORT_SYMBOL(tps65013_set_low_pwr); 1057 1058 /*-------------------------------------------------------------------------*/ 1059 1060 static int __init tps_init(void) 1061 { 1062 u32 tries = 3; 1063 int status = -ENODEV; 1064 1065 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); 1066 1067 /* some boards have startup glitches */ 1068 while (tries--) { 1069 status = i2c_add_driver(&tps65010_driver); 1070 if (the_tps) 1071 break; 1072 i2c_del_driver(&tps65010_driver); 1073 if (!tries) { 1074 printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); 1075 return -ENODEV; 1076 } 1077 pr_debug("%s: re-probe ...\n", DRIVER_NAME); 1078 msleep(10); 1079 } 1080 1081 return status; 1082 } 1083 /* NOTE: this MUST be initialized before the other parts of the system 1084 * that rely on it ... but after the i2c bus on which this relies. 1085 * That is, much earlier than on PC-type systems, which don't often use 1086 * I2C as a core system bus. 1087 */ 1088 subsys_initcall(tps_init); 1089 1090 static void __exit tps_exit(void) 1091 { 1092 i2c_del_driver(&tps65010_driver); 1093 } 1094 module_exit(tps_exit); 1095 1096