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 <asm/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 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); 246 247 248 /* 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 (void) schedule_delayed_work(&tps->work, POWER_POLL_DELAY); 404 405 /* also potentially gpio-in rise or fall */ 406 } 407 408 /* handle IRQs and polling using keventd for now */ 409 static void tps65010_work(struct work_struct *work) 410 { 411 struct tps65010 *tps; 412 413 tps = container_of(work, struct tps65010, work.work); 414 mutex_lock(&tps->lock); 415 416 tps65010_interrupt(tps); 417 418 if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) { 419 int status; 420 u8 chgconfig, tmp; 421 422 chgconfig = i2c_smbus_read_byte_data(tps->client, 423 TPS_CHGCONFIG); 424 chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING); 425 if (tps->vbus == 500) 426 chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING; 427 else if (tps->vbus >= 100) 428 chgconfig |= TPS_VBUS_CHARGING; 429 430 status = i2c_smbus_write_byte_data(tps->client, 431 TPS_CHGCONFIG, chgconfig); 432 433 /* vbus update fails unless VBUS is connected! */ 434 tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG); 435 tps->chgconf = tmp; 436 show_chgconfig(tps->por, "update vbus", tmp); 437 } 438 439 if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags)) 440 enable_irq(tps->client->irq); 441 442 mutex_unlock(&tps->lock); 443 } 444 445 static irqreturn_t tps65010_irq(int irq, void *_tps) 446 { 447 struct tps65010 *tps = _tps; 448 449 disable_irq_nosync(irq); 450 set_bit(FLAG_IRQ_ENABLE, &tps->flags); 451 (void) schedule_work(&tps->work.work); 452 return IRQ_HANDLED; 453 } 454 455 /*-------------------------------------------------------------------------*/ 456 457 /* offsets 0..3 == GPIO1..GPIO4 458 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes) 459 * offset 6 == vibrator motor driver 460 */ 461 static void 462 tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value) 463 { 464 if (offset < 4) 465 tps65010_set_gpio_out_value(offset + 1, value); 466 else if (offset < 6) 467 tps65010_set_led(offset - 3, value ? ON : OFF); 468 else 469 tps65010_set_vib(value); 470 } 471 472 static int 473 tps65010_output(struct gpio_chip *chip, unsigned offset, int value) 474 { 475 /* GPIOs may be input-only */ 476 if (offset < 4) { 477 struct tps65010 *tps; 478 479 tps = container_of(chip, struct tps65010, chip); 480 if (!(tps->outmask & (1 << offset))) 481 return -EINVAL; 482 tps65010_set_gpio_out_value(offset + 1, value); 483 } else if (offset < 6) 484 tps65010_set_led(offset - 3, value ? ON : OFF); 485 else 486 tps65010_set_vib(value); 487 488 return 0; 489 } 490 491 static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset) 492 { 493 int value; 494 struct tps65010 *tps; 495 496 tps = container_of(chip, struct tps65010, chip); 497 498 if (offset < 4) { 499 value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO); 500 if (value < 0) 501 return 0; 502 if (value & (1 << (offset + 4))) /* output */ 503 return !(value & (1 << offset)); 504 else /* input */ 505 return (value & (1 << offset)); 506 } 507 508 /* REVISIT we *could* report LED1/nPG and LED2 state ... */ 509 return 0; 510 } 511 512 513 /*-------------------------------------------------------------------------*/ 514 515 static struct tps65010 *the_tps; 516 517 static int __exit tps65010_remove(struct i2c_client *client) 518 { 519 struct tps65010 *tps = i2c_get_clientdata(client); 520 struct tps65010_board *board = client->dev.platform_data; 521 522 if (board && board->teardown) { 523 int status = board->teardown(client, board->context); 524 if (status < 0) 525 dev_dbg(&client->dev, "board %s %s err %d\n", 526 "teardown", client->name, status); 527 } 528 if (client->irq > 0) 529 free_irq(client->irq, tps); 530 cancel_delayed_work(&tps->work); 531 flush_scheduled_work(); 532 debugfs_remove(tps->file); 533 kfree(tps); 534 the_tps = NULL; 535 return 0; 536 } 537 538 static int tps65010_probe(struct i2c_client *client, 539 const struct i2c_device_id *id) 540 { 541 struct tps65010 *tps; 542 int status; 543 struct tps65010_board *board = client->dev.platform_data; 544 545 if (the_tps) { 546 dev_dbg(&client->dev, "only one tps6501x chip allowed\n"); 547 return -ENODEV; 548 } 549 550 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 551 return -EINVAL; 552 553 tps = kzalloc(sizeof *tps, GFP_KERNEL); 554 if (!tps) 555 return -ENOMEM; 556 557 mutex_init(&tps->lock); 558 INIT_DELAYED_WORK(&tps->work, tps65010_work); 559 tps->client = client; 560 tps->model = id->driver_data; 561 562 /* the IRQ is active low, but many gpio lines can't support that 563 * so this driver uses falling-edge triggers instead. 564 */ 565 if (client->irq > 0) { 566 status = request_irq(client->irq, tps65010_irq, 567 IRQF_SAMPLE_RANDOM | IRQF_TRIGGER_FALLING, 568 DRIVER_NAME, tps); 569 if (status < 0) { 570 dev_dbg(&client->dev, "can't get IRQ %d, err %d\n", 571 client->irq, status); 572 goto fail1; 573 } 574 /* annoying race here, ideally we'd have an option 575 * to claim the irq now and enable it later. 576 * FIXME genirq IRQF_NOAUTOEN now solves that ... 577 */ 578 disable_irq(client->irq); 579 set_bit(FLAG_IRQ_ENABLE, &tps->flags); 580 } else 581 dev_warn(&client->dev, "IRQ not configured!\n"); 582 583 584 switch (tps->model) { 585 case TPS65010: 586 case TPS65012: 587 tps->por = 1; 588 break; 589 /* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */ 590 } 591 tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG); 592 show_chgconfig(tps->por, "conf/init", tps->chgconf); 593 594 show_chgstatus("chg/init", 595 i2c_smbus_read_byte_data(client, TPS_CHGSTATUS)); 596 show_regstatus("reg/init", 597 i2c_smbus_read_byte_data(client, TPS_REGSTATUS)); 598 599 pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME, 600 i2c_smbus_read_byte_data(client, TPS_VDCDC1), 601 i2c_smbus_read_byte_data(client, TPS_VDCDC2), 602 i2c_smbus_read_byte_data(client, TPS_VREGS1)); 603 pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME, 604 i2c_smbus_read_byte_data(client, TPS_DEFGPIO), 605 i2c_smbus_read_byte_data(client, TPS_MASK3)); 606 607 i2c_set_clientdata(client, tps); 608 the_tps = tps; 609 610 #if defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG) 611 /* USB hosts can't draw VBUS. OTG devices could, later 612 * when OTG infrastructure enables it. USB peripherals 613 * could be relying on VBUS while booting, though. 614 */ 615 tps->vbus = 100; 616 #endif 617 618 /* unmask the "interesting" irqs, then poll once to 619 * kickstart monitoring, initialize shadowed status 620 * registers, and maybe disable VBUS draw. 621 */ 622 tps->nmask1 = ~0; 623 (void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1); 624 625 tps->nmask2 = TPS_REG_ONOFF; 626 if (tps->model == TPS65013) 627 tps->nmask2 |= TPS_REG_NO_CHG; 628 (void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2); 629 630 (void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f 631 | i2c_smbus_read_byte_data(client, TPS_MASK3)); 632 633 tps65010_work(&tps->work.work); 634 635 tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL, 636 tps, DEBUG_FOPS); 637 638 /* optionally register GPIOs */ 639 if (board && board->base != 0) { 640 tps->outmask = board->outmask; 641 642 tps->chip.label = client->name; 643 tps->chip.dev = &client->dev; 644 tps->chip.owner = THIS_MODULE; 645 646 tps->chip.set = tps65010_gpio_set; 647 tps->chip.direction_output = tps65010_output; 648 649 /* NOTE: only partial support for inputs; nyet IRQs */ 650 tps->chip.get = tps65010_gpio_get; 651 652 tps->chip.base = board->base; 653 tps->chip.ngpio = 7; 654 tps->chip.can_sleep = 1; 655 656 status = gpiochip_add(&tps->chip); 657 if (status < 0) 658 dev_err(&client->dev, "can't add gpiochip, err %d\n", 659 status); 660 else if (board->setup) { 661 status = board->setup(client, board->context); 662 if (status < 0) { 663 dev_dbg(&client->dev, 664 "board %s %s err %d\n", 665 "setup", client->name, status); 666 status = 0; 667 } 668 } 669 } 670 671 return 0; 672 fail1: 673 kfree(tps); 674 return status; 675 } 676 677 static const struct i2c_device_id tps65010_id[] = { 678 { "tps65010", TPS65010 }, 679 { "tps65011", TPS65011 }, 680 { "tps65012", TPS65012 }, 681 { "tps65013", TPS65013 }, 682 { "tps65014", TPS65011 }, /* tps65011 charging at 6.5V max */ 683 { } 684 }; 685 MODULE_DEVICE_TABLE(i2c, tps65010_id); 686 687 static struct i2c_driver tps65010_driver = { 688 .driver = { 689 .name = "tps65010", 690 }, 691 .probe = tps65010_probe, 692 .remove = __exit_p(tps65010_remove), 693 .id_table = tps65010_id, 694 }; 695 696 /*-------------------------------------------------------------------------*/ 697 698 /* Draw from VBUS: 699 * 0 mA -- DON'T DRAW (might supply power instead) 700 * 100 mA -- usb unit load (slowest charge rate) 701 * 500 mA -- usb high power (fast battery charge) 702 */ 703 int tps65010_set_vbus_draw(unsigned mA) 704 { 705 unsigned long flags; 706 707 if (!the_tps) 708 return -ENODEV; 709 710 /* assumes non-SMP */ 711 local_irq_save(flags); 712 if (mA >= 500) 713 mA = 500; 714 else if (mA >= 100) 715 mA = 100; 716 else 717 mA = 0; 718 the_tps->vbus = mA; 719 if ((the_tps->chgstatus & TPS_CHG_USB) 720 && test_and_set_bit( 721 FLAG_VBUS_CHANGED, &the_tps->flags)) { 722 /* gadget drivers call this in_irq() */ 723 (void) schedule_work(&the_tps->work.work); 724 } 725 local_irq_restore(flags); 726 727 return 0; 728 } 729 EXPORT_SYMBOL(tps65010_set_vbus_draw); 730 731 /*-------------------------------------------------------------------------*/ 732 /* tps65010_set_gpio_out_value parameter: 733 * gpio: GPIO1, GPIO2, GPIO3 or GPIO4 734 * value: LOW or HIGH 735 */ 736 int tps65010_set_gpio_out_value(unsigned gpio, unsigned value) 737 { 738 int status; 739 unsigned defgpio; 740 741 if (!the_tps) 742 return -ENODEV; 743 if ((gpio < GPIO1) || (gpio > GPIO4)) 744 return -EINVAL; 745 746 mutex_lock(&the_tps->lock); 747 748 defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO); 749 750 /* Configure GPIO for output */ 751 defgpio |= 1 << (gpio + 3); 752 753 /* Writing 1 forces a logic 0 on that GPIO and vice versa */ 754 switch (value) { 755 case LOW: 756 defgpio |= 1 << (gpio - 1); /* set GPIO low by writing 1 */ 757 break; 758 /* case HIGH: */ 759 default: 760 defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */ 761 break; 762 } 763 764 status = i2c_smbus_write_byte_data(the_tps->client, 765 TPS_DEFGPIO, defgpio); 766 767 pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME, 768 gpio, value ? "high" : "low", 769 i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO)); 770 771 mutex_unlock(&the_tps->lock); 772 return status; 773 } 774 EXPORT_SYMBOL(tps65010_set_gpio_out_value); 775 776 /*-------------------------------------------------------------------------*/ 777 /* tps65010_set_led parameter: 778 * led: LED1 or LED2 779 * mode: ON, OFF or BLINK 780 */ 781 int tps65010_set_led(unsigned led, unsigned mode) 782 { 783 int status; 784 unsigned led_on, led_per, offs; 785 786 if (!the_tps) 787 return -ENODEV; 788 789 if (led == LED1) 790 offs = 0; 791 else { 792 offs = 2; 793 led = LED2; 794 } 795 796 mutex_lock(&the_tps->lock); 797 798 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 799 i2c_smbus_read_byte_data(the_tps->client, 800 TPS_LED1_ON + offs)); 801 802 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 803 i2c_smbus_read_byte_data(the_tps->client, 804 TPS_LED1_PER + offs)); 805 806 switch (mode) { 807 case OFF: 808 led_on = 1 << 7; 809 led_per = 0 << 7; 810 break; 811 case ON: 812 led_on = 1 << 7; 813 led_per = 1 << 7; 814 break; 815 case BLINK: 816 led_on = 0x30 | (0 << 7); 817 led_per = 0x08 | (1 << 7); 818 break; 819 default: 820 printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n", 821 DRIVER_NAME); 822 mutex_unlock(&the_tps->lock); 823 return -EINVAL; 824 } 825 826 status = i2c_smbus_write_byte_data(the_tps->client, 827 TPS_LED1_ON + offs, led_on); 828 829 if (status != 0) { 830 printk(KERN_ERR "%s: Failed to write led%i_on register\n", 831 DRIVER_NAME, led); 832 mutex_unlock(&the_tps->lock); 833 return status; 834 } 835 836 pr_debug("%s: led%i_on 0x%02x\n", DRIVER_NAME, led, 837 i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs)); 838 839 status = i2c_smbus_write_byte_data(the_tps->client, 840 TPS_LED1_PER + offs, led_per); 841 842 if (status != 0) { 843 printk(KERN_ERR "%s: Failed to write led%i_per register\n", 844 DRIVER_NAME, led); 845 mutex_unlock(&the_tps->lock); 846 return status; 847 } 848 849 pr_debug("%s: led%i_per 0x%02x\n", DRIVER_NAME, led, 850 i2c_smbus_read_byte_data(the_tps->client, 851 TPS_LED1_PER + offs)); 852 853 mutex_unlock(&the_tps->lock); 854 855 return status; 856 } 857 EXPORT_SYMBOL(tps65010_set_led); 858 859 /*-------------------------------------------------------------------------*/ 860 /* tps65010_set_vib parameter: 861 * value: ON or OFF 862 */ 863 int tps65010_set_vib(unsigned value) 864 { 865 int status; 866 unsigned vdcdc2; 867 868 if (!the_tps) 869 return -ENODEV; 870 871 mutex_lock(&the_tps->lock); 872 873 vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2); 874 vdcdc2 &= ~(1 << 1); 875 if (value) 876 vdcdc2 |= (1 << 1); 877 status = i2c_smbus_write_byte_data(the_tps->client, 878 TPS_VDCDC2, vdcdc2); 879 880 pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off"); 881 882 mutex_unlock(&the_tps->lock); 883 return status; 884 } 885 EXPORT_SYMBOL(tps65010_set_vib); 886 887 /*-------------------------------------------------------------------------*/ 888 /* tps65010_set_low_pwr parameter: 889 * mode: ON or OFF 890 */ 891 int tps65010_set_low_pwr(unsigned mode) 892 { 893 int status; 894 unsigned vdcdc1; 895 896 if (!the_tps) 897 return -ENODEV; 898 899 mutex_lock(&the_tps->lock); 900 901 pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME, 902 mode ? "enable" : "disable", 903 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 904 905 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 906 907 switch (mode) { 908 case OFF: 909 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 910 break; 911 /* case ON: */ 912 default: 913 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 914 break; 915 } 916 917 status = i2c_smbus_write_byte_data(the_tps->client, 918 TPS_VDCDC1, vdcdc1); 919 920 if (status != 0) 921 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 922 DRIVER_NAME); 923 else 924 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 925 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 926 927 mutex_unlock(&the_tps->lock); 928 929 return status; 930 } 931 EXPORT_SYMBOL(tps65010_set_low_pwr); 932 933 /*-------------------------------------------------------------------------*/ 934 /* tps65010_config_vregs1 parameter: 935 * value to be written to VREGS1 register 936 * Note: The complete register is written, set all bits you need 937 */ 938 int tps65010_config_vregs1(unsigned value) 939 { 940 int status; 941 942 if (!the_tps) 943 return -ENODEV; 944 945 mutex_lock(&the_tps->lock); 946 947 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 948 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 949 950 status = i2c_smbus_write_byte_data(the_tps->client, 951 TPS_VREGS1, value); 952 953 if (status != 0) 954 printk(KERN_ERR "%s: Failed to write vregs1 register\n", 955 DRIVER_NAME); 956 else 957 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 958 i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1)); 959 960 mutex_unlock(&the_tps->lock); 961 962 return status; 963 } 964 EXPORT_SYMBOL(tps65010_config_vregs1); 965 966 int tps65010_config_vdcdc2(unsigned value) 967 { 968 struct i2c_client *c; 969 int status; 970 971 if (!the_tps) 972 return -ENODEV; 973 974 c = the_tps->client; 975 mutex_lock(&the_tps->lock); 976 977 pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME, 978 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 979 980 status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value); 981 982 if (status != 0) 983 printk(KERN_ERR "%s: Failed to write vdcdc2 register\n", 984 DRIVER_NAME); 985 else 986 pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME, 987 i2c_smbus_read_byte_data(c, TPS_VDCDC2)); 988 989 mutex_unlock(&the_tps->lock); 990 return status; 991 } 992 EXPORT_SYMBOL(tps65010_config_vdcdc2); 993 994 /*-------------------------------------------------------------------------*/ 995 /* tps65013_set_low_pwr parameter: 996 * mode: ON or OFF 997 */ 998 999 /* FIXME: Assumes AC or USB power is present. Setting AUA bit is not 1000 required if power supply is through a battery */ 1001 1002 int tps65013_set_low_pwr(unsigned mode) 1003 { 1004 int status; 1005 unsigned vdcdc1, chgconfig; 1006 1007 if (!the_tps || the_tps->por) 1008 return -ENODEV; 1009 1010 mutex_lock(&the_tps->lock); 1011 1012 pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n", 1013 DRIVER_NAME, 1014 mode ? "enable" : "disable", 1015 i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG), 1016 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 1017 1018 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 1019 vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1); 1020 1021 switch (mode) { 1022 case OFF: 1023 chgconfig &= ~TPS65013_AUA; /* disable AUA bit */ 1024 vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */ 1025 break; 1026 /* case ON: */ 1027 default: 1028 chgconfig |= TPS65013_AUA; /* enable AUA bit */ 1029 vdcdc1 |= TPS_ENABLE_LP; /* enable ENABLE_LP bit */ 1030 break; 1031 } 1032 1033 status = i2c_smbus_write_byte_data(the_tps->client, 1034 TPS_CHGCONFIG, chgconfig); 1035 if (status != 0) { 1036 printk(KERN_ERR "%s: Failed to write chconfig register\n", 1037 DRIVER_NAME); 1038 mutex_unlock(&the_tps->lock); 1039 return status; 1040 } 1041 1042 chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG); 1043 the_tps->chgconf = chgconfig; 1044 show_chgconfig(0, "chgconf", chgconfig); 1045 1046 status = i2c_smbus_write_byte_data(the_tps->client, 1047 TPS_VDCDC1, vdcdc1); 1048 1049 if (status != 0) 1050 printk(KERN_ERR "%s: Failed to write vdcdc1 register\n", 1051 DRIVER_NAME); 1052 else 1053 pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME, 1054 i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1)); 1055 1056 mutex_unlock(&the_tps->lock); 1057 1058 return status; 1059 } 1060 EXPORT_SYMBOL(tps65013_set_low_pwr); 1061 1062 /*-------------------------------------------------------------------------*/ 1063 1064 static int __init tps_init(void) 1065 { 1066 u32 tries = 3; 1067 int status = -ENODEV; 1068 1069 printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION); 1070 1071 /* some boards have startup glitches */ 1072 while (tries--) { 1073 status = i2c_add_driver(&tps65010_driver); 1074 if (the_tps) 1075 break; 1076 i2c_del_driver(&tps65010_driver); 1077 if (!tries) { 1078 printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME); 1079 return -ENODEV; 1080 } 1081 pr_debug("%s: re-probe ...\n", DRIVER_NAME); 1082 msleep(10); 1083 } 1084 1085 return status; 1086 } 1087 /* NOTE: this MUST be initialized before the other parts of the system 1088 * that rely on it ... but after the i2c bus on which this relies. 1089 * That is, much earlier than on PC-type systems, which don't often use 1090 * I2C as a core system bus. 1091 */ 1092 subsys_initcall(tps_init); 1093 1094 static void __exit tps_exit(void) 1095 { 1096 i2c_del_driver(&tps65010_driver); 1097 } 1098 module_exit(tps_exit); 1099 1100