1 /* 2 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM 3 * and audio CODEC devices 4 * 5 * Copyright (C) 2005-2006 Texas Instruments, Inc. 6 * 7 * Modifications to defer interrupt handling to a kernel thread: 8 * Copyright (C) 2006 MontaVista Software, Inc. 9 * 10 * Based on tlv320aic23.c: 11 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> 12 * 13 * Code cleanup and modifications to IRQ handler. 14 * by syed khasim <x0khasim@ti.com> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #include <linux/init.h> 32 #include <linux/mutex.h> 33 #include <linux/platform_device.h> 34 #include <linux/clk.h> 35 #include <linux/err.h> 36 37 #include <linux/regulator/machine.h> 38 39 #include <linux/i2c.h> 40 #include <linux/i2c/twl.h> 41 42 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) 43 #include <plat/cpu.h> 44 #endif 45 46 /* 47 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power 48 * Management and System Companion Device" chips originally designed for 49 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, 50 * often at around 3 Mbit/sec, including for interrupt handling. 51 * 52 * This driver core provides genirq support for the interrupts emitted, 53 * by the various modules, and exports register access primitives. 54 * 55 * FIXME this driver currently requires use of the first interrupt line 56 * (and associated registers). 57 */ 58 59 #define DRIVER_NAME "twl" 60 61 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \ 62 defined(CONFIG_TWL4030_BCI_BATTERY_MODULE) 63 #define twl_has_bci() true 64 #else 65 #define twl_has_bci() false 66 #endif 67 68 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE) 69 #define twl_has_keypad() true 70 #else 71 #define twl_has_keypad() false 72 #endif 73 74 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE) 75 #define twl_has_gpio() true 76 #else 77 #define twl_has_gpio() false 78 #endif 79 80 #if defined(CONFIG_REGULATOR_TWL4030) \ 81 || defined(CONFIG_REGULATOR_TWL4030_MODULE) 82 #define twl_has_regulator() true 83 #else 84 #define twl_has_regulator() false 85 #endif 86 87 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE) 88 #define twl_has_madc() true 89 #else 90 #define twl_has_madc() false 91 #endif 92 93 #ifdef CONFIG_TWL4030_POWER 94 #define twl_has_power() true 95 #else 96 #define twl_has_power() false 97 #endif 98 99 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE) 100 #define twl_has_rtc() true 101 #else 102 #define twl_has_rtc() false 103 #endif 104 105 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) 106 #define twl_has_usb() true 107 #else 108 #define twl_has_usb() false 109 #endif 110 111 #if defined(CONFIG_TWL4030_WATCHDOG) || \ 112 defined(CONFIG_TWL4030_WATCHDOG_MODULE) 113 #define twl_has_watchdog() true 114 #else 115 #define twl_has_watchdog() false 116 #endif 117 118 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) 119 #define twl_has_codec() true 120 #else 121 #define twl_has_codec() false 122 #endif 123 124 /* Triton Core internal information (BEGIN) */ 125 126 /* Last - for index max*/ 127 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG 128 129 #define TWL_NUM_SLAVES 4 130 131 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \ 132 || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE) 133 #define twl_has_pwrbutton() true 134 #else 135 #define twl_has_pwrbutton() false 136 #endif 137 138 #define SUB_CHIP_ID0 0 139 #define SUB_CHIP_ID1 1 140 #define SUB_CHIP_ID2 2 141 #define SUB_CHIP_ID3 3 142 143 #define TWL_MODULE_LAST TWL4030_MODULE_LAST 144 145 /* Base Address defns for twl4030_map[] */ 146 147 /* subchip/slave 0 - USB ID */ 148 #define TWL4030_BASEADD_USB 0x0000 149 150 /* subchip/slave 1 - AUD ID */ 151 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 152 #define TWL4030_BASEADD_GPIO 0x0098 153 #define TWL4030_BASEADD_INTBR 0x0085 154 #define TWL4030_BASEADD_PIH 0x0080 155 #define TWL4030_BASEADD_TEST 0x004C 156 157 /* subchip/slave 2 - AUX ID */ 158 #define TWL4030_BASEADD_INTERRUPTS 0x00B9 159 #define TWL4030_BASEADD_LED 0x00EE 160 #define TWL4030_BASEADD_MADC 0x0000 161 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 162 #define TWL4030_BASEADD_PRECHARGE 0x00AA 163 #define TWL4030_BASEADD_PWM0 0x00F8 164 #define TWL4030_BASEADD_PWM1 0x00FB 165 #define TWL4030_BASEADD_PWMA 0x00EF 166 #define TWL4030_BASEADD_PWMB 0x00F1 167 #define TWL4030_BASEADD_KEYPAD 0x00D2 168 169 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ 170 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's 171 one */ 172 173 /* subchip/slave 3 - POWER ID */ 174 #define TWL4030_BASEADD_BACKUP 0x0014 175 #define TWL4030_BASEADD_INT 0x002E 176 #define TWL4030_BASEADD_PM_MASTER 0x0036 177 #define TWL4030_BASEADD_PM_RECEIVER 0x005B 178 #define TWL4030_BASEADD_RTC 0x001C 179 #define TWL4030_BASEADD_SECURED_REG 0x0000 180 181 /* Triton Core internal information (END) */ 182 183 184 /* subchip/slave 0 0x48 - POWER */ 185 #define TWL6030_BASEADD_RTC 0x0000 186 #define TWL6030_BASEADD_MEM 0x0017 187 #define TWL6030_BASEADD_PM_MASTER 0x001F 188 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ 189 #define TWL6030_BASEADD_PM_MISC 0x00E2 190 #define TWL6030_BASEADD_PM_PUPD 0x00F0 191 192 /* subchip/slave 1 0x49 - FEATURE */ 193 #define TWL6030_BASEADD_USB 0x0000 194 #define TWL6030_BASEADD_GPADC_CTRL 0x002E 195 #define TWL6030_BASEADD_AUX 0x0090 196 #define TWL6030_BASEADD_PWM 0x00BA 197 #define TWL6030_BASEADD_GASGAUGE 0x00C0 198 #define TWL6030_BASEADD_PIH 0x00D0 199 #define TWL6030_BASEADD_CHARGER 0x00E0 200 201 /* subchip/slave 2 0x4A - DFT */ 202 #define TWL6030_BASEADD_DIEID 0x00C0 203 204 /* subchip/slave 3 0x4B - AUDIO */ 205 #define TWL6030_BASEADD_AUDIO 0x0000 206 #define TWL6030_BASEADD_RSV 0x0000 207 208 /* Few power values */ 209 #define R_CFG_BOOT 0x05 210 #define R_PROTECT_KEY 0x0E 211 212 /* access control values for R_PROTECT_KEY */ 213 #define KEY_UNLOCK1 0xce 214 #define KEY_UNLOCK2 0xec 215 #define KEY_LOCK 0x00 216 217 /* some fields in R_CFG_BOOT */ 218 #define HFCLK_FREQ_19p2_MHZ (1 << 0) 219 #define HFCLK_FREQ_26_MHZ (2 << 0) 220 #define HFCLK_FREQ_38p4_MHZ (3 << 0) 221 #define HIGH_PERF_SQ (1 << 3) 222 #define CK32K_LOWPWR_EN (1 << 7) 223 224 225 /* chip-specific feature flags, for i2c_device_id.driver_data */ 226 #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ 227 #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ 228 #define TWL5031 BIT(2) /* twl5031 has different registers */ 229 #define TWL6030_CLASS BIT(3) /* TWL6030 class */ 230 231 /*----------------------------------------------------------------------*/ 232 233 /* is driver active, bound to a chip? */ 234 static bool inuse; 235 236 static unsigned int twl_id; 237 unsigned int twl_rev(void) 238 { 239 return twl_id; 240 } 241 EXPORT_SYMBOL(twl_rev); 242 243 /* Structure for each TWL4030/TWL6030 Slave */ 244 struct twl_client { 245 struct i2c_client *client; 246 u8 address; 247 248 /* max numb of i2c_msg required is for read =2 */ 249 struct i2c_msg xfer_msg[2]; 250 251 /* To lock access to xfer_msg */ 252 struct mutex xfer_lock; 253 }; 254 255 static struct twl_client twl_modules[TWL_NUM_SLAVES]; 256 257 258 /* mapping the module id to slave id and base address */ 259 struct twl_mapping { 260 unsigned char sid; /* Slave ID */ 261 unsigned char base; /* base address */ 262 }; 263 struct twl_mapping *twl_map; 264 265 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { 266 /* 267 * NOTE: don't change this table without updating the 268 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 269 * so they continue to match the order in this table. 270 */ 271 272 { 0, TWL4030_BASEADD_USB }, 273 274 { 1, TWL4030_BASEADD_AUDIO_VOICE }, 275 { 1, TWL4030_BASEADD_GPIO }, 276 { 1, TWL4030_BASEADD_INTBR }, 277 { 1, TWL4030_BASEADD_PIH }, 278 { 1, TWL4030_BASEADD_TEST }, 279 280 { 2, TWL4030_BASEADD_KEYPAD }, 281 { 2, TWL4030_BASEADD_MADC }, 282 { 2, TWL4030_BASEADD_INTERRUPTS }, 283 { 2, TWL4030_BASEADD_LED }, 284 { 2, TWL4030_BASEADD_MAIN_CHARGE }, 285 { 2, TWL4030_BASEADD_PRECHARGE }, 286 { 2, TWL4030_BASEADD_PWM0 }, 287 { 2, TWL4030_BASEADD_PWM1 }, 288 { 2, TWL4030_BASEADD_PWMA }, 289 { 2, TWL4030_BASEADD_PWMB }, 290 { 2, TWL5031_BASEADD_ACCESSORY }, 291 { 2, TWL5031_BASEADD_INTERRUPTS }, 292 293 { 3, TWL4030_BASEADD_BACKUP }, 294 { 3, TWL4030_BASEADD_INT }, 295 { 3, TWL4030_BASEADD_PM_MASTER }, 296 { 3, TWL4030_BASEADD_PM_RECEIVER }, 297 { 3, TWL4030_BASEADD_RTC }, 298 { 3, TWL4030_BASEADD_SECURED_REG }, 299 }; 300 301 static struct twl_mapping twl6030_map[] = { 302 /* 303 * NOTE: don't change this table without updating the 304 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 305 * so they continue to match the order in this table. 306 */ 307 { SUB_CHIP_ID1, TWL6030_BASEADD_USB }, 308 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO }, 309 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID }, 310 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 311 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH }, 312 313 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 314 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 315 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL }, 316 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 317 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 318 319 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER }, 320 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE }, 321 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM }, 322 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 323 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 324 325 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 326 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 327 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 328 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER }, 329 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC }, 330 331 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC }, 332 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM }, 333 }; 334 335 /*----------------------------------------------------------------------*/ 336 337 /* Exported Functions */ 338 339 /** 340 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 341 * @mod_no: module number 342 * @value: an array of num_bytes+1 containing data to write 343 * @reg: register address (just offset will do) 344 * @num_bytes: number of bytes to transfer 345 * 346 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and 347 * valid data starts at Offset 1. 348 * 349 * Returns the result of operation - 0 is success 350 */ 351 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 352 { 353 int ret; 354 int sid; 355 struct twl_client *twl; 356 struct i2c_msg *msg; 357 358 if (unlikely(mod_no > TWL_MODULE_LAST)) { 359 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 360 return -EPERM; 361 } 362 sid = twl_map[mod_no].sid; 363 twl = &twl_modules[sid]; 364 365 if (unlikely(!inuse)) { 366 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 367 return -EPERM; 368 } 369 mutex_lock(&twl->xfer_lock); 370 /* 371 * [MSG1]: fill the register address data 372 * fill the data Tx buffer 373 */ 374 msg = &twl->xfer_msg[0]; 375 msg->addr = twl->address; 376 msg->len = num_bytes + 1; 377 msg->flags = 0; 378 msg->buf = value; 379 /* over write the first byte of buffer with the register address */ 380 *value = twl_map[mod_no].base + reg; 381 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); 382 mutex_unlock(&twl->xfer_lock); 383 384 /* i2c_transfer returns number of messages transferred */ 385 if (ret != 1) { 386 pr_err("%s: i2c_write failed to transfer all messages\n", 387 DRIVER_NAME); 388 if (ret < 0) 389 return ret; 390 else 391 return -EIO; 392 } else { 393 return 0; 394 } 395 } 396 EXPORT_SYMBOL(twl_i2c_write); 397 398 /** 399 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 400 * @mod_no: module number 401 * @value: an array of num_bytes containing data to be read 402 * @reg: register address (just offset will do) 403 * @num_bytes: number of bytes to transfer 404 * 405 * Returns result of operation - num_bytes is success else failure. 406 */ 407 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 408 { 409 int ret; 410 u8 val; 411 int sid; 412 struct twl_client *twl; 413 struct i2c_msg *msg; 414 415 if (unlikely(mod_no > TWL_MODULE_LAST)) { 416 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 417 return -EPERM; 418 } 419 sid = twl_map[mod_no].sid; 420 twl = &twl_modules[sid]; 421 422 if (unlikely(!inuse)) { 423 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 424 return -EPERM; 425 } 426 mutex_lock(&twl->xfer_lock); 427 /* [MSG1] fill the register address data */ 428 msg = &twl->xfer_msg[0]; 429 msg->addr = twl->address; 430 msg->len = 1; 431 msg->flags = 0; /* Read the register value */ 432 val = twl_map[mod_no].base + reg; 433 msg->buf = &val; 434 /* [MSG2] fill the data rx buffer */ 435 msg = &twl->xfer_msg[1]; 436 msg->addr = twl->address; 437 msg->flags = I2C_M_RD; /* Read the register value */ 438 msg->len = num_bytes; /* only n bytes */ 439 msg->buf = value; 440 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); 441 mutex_unlock(&twl->xfer_lock); 442 443 /* i2c_transfer returns number of messages transferred */ 444 if (ret != 2) { 445 pr_err("%s: i2c_read failed to transfer all messages\n", 446 DRIVER_NAME); 447 if (ret < 0) 448 return ret; 449 else 450 return -EIO; 451 } else { 452 return 0; 453 } 454 } 455 EXPORT_SYMBOL(twl_i2c_read); 456 457 /** 458 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0 459 * @mod_no: module number 460 * @value: the value to be written 8 bit 461 * @reg: register address (just offset will do) 462 * 463 * Returns result of operation - 0 is success 464 */ 465 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg) 466 { 467 468 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ 469 u8 temp_buffer[2] = { 0 }; 470 /* offset 1 contains the data */ 471 temp_buffer[1] = value; 472 return twl_i2c_write(mod_no, temp_buffer, reg, 1); 473 } 474 EXPORT_SYMBOL(twl_i2c_write_u8); 475 476 /** 477 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0 478 * @mod_no: module number 479 * @value: the value read 8 bit 480 * @reg: register address (just offset will do) 481 * 482 * Returns result of operation - 0 is success 483 */ 484 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) 485 { 486 return twl_i2c_read(mod_no, value, reg, 1); 487 } 488 EXPORT_SYMBOL(twl_i2c_read_u8); 489 490 /*----------------------------------------------------------------------*/ 491 492 static struct device * 493 add_numbered_child(unsigned chip, const char *name, int num, 494 void *pdata, unsigned pdata_len, 495 bool can_wakeup, int irq0, int irq1) 496 { 497 struct platform_device *pdev; 498 struct twl_client *twl = &twl_modules[chip]; 499 int status; 500 501 pdev = platform_device_alloc(name, num); 502 if (!pdev) { 503 dev_dbg(&twl->client->dev, "can't alloc dev\n"); 504 status = -ENOMEM; 505 goto err; 506 } 507 508 device_init_wakeup(&pdev->dev, can_wakeup); 509 pdev->dev.parent = &twl->client->dev; 510 511 if (pdata) { 512 status = platform_device_add_data(pdev, pdata, pdata_len); 513 if (status < 0) { 514 dev_dbg(&pdev->dev, "can't add platform_data\n"); 515 goto err; 516 } 517 } 518 519 if (irq0) { 520 struct resource r[2] = { 521 { .start = irq0, .flags = IORESOURCE_IRQ, }, 522 { .start = irq1, .flags = IORESOURCE_IRQ, }, 523 }; 524 525 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); 526 if (status < 0) { 527 dev_dbg(&pdev->dev, "can't add irqs\n"); 528 goto err; 529 } 530 } 531 532 status = platform_device_add(pdev); 533 534 err: 535 if (status < 0) { 536 platform_device_put(pdev); 537 dev_err(&twl->client->dev, "can't add %s dev\n", name); 538 return ERR_PTR(status); 539 } 540 return &pdev->dev; 541 } 542 543 static inline struct device *add_child(unsigned chip, const char *name, 544 void *pdata, unsigned pdata_len, 545 bool can_wakeup, int irq0, int irq1) 546 { 547 return add_numbered_child(chip, name, -1, pdata, pdata_len, 548 can_wakeup, irq0, irq1); 549 } 550 551 static struct device * 552 add_regulator_linked(int num, struct regulator_init_data *pdata, 553 struct regulator_consumer_supply *consumers, 554 unsigned num_consumers) 555 { 556 unsigned sub_chip_id; 557 /* regulator framework demands init_data ... */ 558 if (!pdata) 559 return NULL; 560 561 if (consumers) { 562 pdata->consumer_supplies = consumers; 563 pdata->num_consumer_supplies = num_consumers; 564 } 565 566 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ 567 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid; 568 return add_numbered_child(sub_chip_id, "twl_reg", num, 569 pdata, sizeof(*pdata), false, 0, 0); 570 } 571 572 static struct device * 573 add_regulator(int num, struct regulator_init_data *pdata) 574 { 575 return add_regulator_linked(num, pdata, NULL, 0); 576 } 577 578 /* 579 * NOTE: We know the first 8 IRQs after pdata->base_irq are 580 * for the PIH, and the next are for the PWR_INT SIH, since 581 * that's how twl_init_irq() sets things up. 582 */ 583 584 static int 585 add_children(struct twl4030_platform_data *pdata, unsigned long features) 586 { 587 struct device *child; 588 unsigned sub_chip_id; 589 590 if (twl_has_bci() && pdata->bci && 591 !(features & (TPS_SUBSET | TWL5031))) { 592 child = add_child(3, "twl4030_bci", 593 pdata->bci, sizeof(*pdata->bci), 594 false, 595 /* irq0 = CHG_PRES, irq1 = BCI */ 596 pdata->irq_base + BCI_PRES_INTR_OFFSET, 597 pdata->irq_base + BCI_INTR_OFFSET); 598 if (IS_ERR(child)) 599 return PTR_ERR(child); 600 } 601 602 if (twl_has_gpio() && pdata->gpio) { 603 child = add_child(SUB_CHIP_ID1, "twl4030_gpio", 604 pdata->gpio, sizeof(*pdata->gpio), 605 false, pdata->irq_base + GPIO_INTR_OFFSET, 0); 606 if (IS_ERR(child)) 607 return PTR_ERR(child); 608 } 609 610 if (twl_has_keypad() && pdata->keypad) { 611 child = add_child(SUB_CHIP_ID2, "twl4030_keypad", 612 pdata->keypad, sizeof(*pdata->keypad), 613 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0); 614 if (IS_ERR(child)) 615 return PTR_ERR(child); 616 } 617 618 if (twl_has_madc() && pdata->madc) { 619 child = add_child(2, "twl4030_madc", 620 pdata->madc, sizeof(*pdata->madc), 621 true, pdata->irq_base + MADC_INTR_OFFSET, 0); 622 if (IS_ERR(child)) 623 return PTR_ERR(child); 624 } 625 626 if (twl_has_rtc()) { 627 /* 628 * REVISIT platform_data here currently might expose the 629 * "msecure" line ... but for now we just expect board 630 * setup to tell the chip "it's always ok to SET_TIME". 631 * Eventually, Linux might become more aware of such 632 * HW security concerns, and "least privilege". 633 */ 634 sub_chip_id = twl_map[TWL_MODULE_RTC].sid; 635 child = add_child(sub_chip_id, "twl_rtc", 636 NULL, 0, 637 true, pdata->irq_base + RTC_INTR_OFFSET, 0); 638 if (IS_ERR(child)) 639 return PTR_ERR(child); 640 } 641 642 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) { 643 644 static struct regulator_consumer_supply usb1v5 = { 645 .supply = "usb1v5", 646 }; 647 static struct regulator_consumer_supply usb1v8 = { 648 .supply = "usb1v8", 649 }; 650 static struct regulator_consumer_supply usb3v1 = { 651 .supply = "usb3v1", 652 }; 653 654 /* First add the regulators so that they can be used by transceiver */ 655 if (twl_has_regulator()) { 656 /* this is a template that gets copied */ 657 struct regulator_init_data usb_fixed = { 658 .constraints.valid_modes_mask = 659 REGULATOR_MODE_NORMAL 660 | REGULATOR_MODE_STANDBY, 661 .constraints.valid_ops_mask = 662 REGULATOR_CHANGE_MODE 663 | REGULATOR_CHANGE_STATUS, 664 }; 665 666 child = add_regulator_linked(TWL4030_REG_VUSB1V5, 667 &usb_fixed, &usb1v5, 1); 668 if (IS_ERR(child)) 669 return PTR_ERR(child); 670 671 child = add_regulator_linked(TWL4030_REG_VUSB1V8, 672 &usb_fixed, &usb1v8, 1); 673 if (IS_ERR(child)) 674 return PTR_ERR(child); 675 676 child = add_regulator_linked(TWL4030_REG_VUSB3V1, 677 &usb_fixed, &usb3v1, 1); 678 if (IS_ERR(child)) 679 return PTR_ERR(child); 680 681 } 682 683 child = add_child(0, "twl4030_usb", 684 pdata->usb, sizeof(*pdata->usb), 685 true, 686 /* irq0 = USB_PRES, irq1 = USB */ 687 pdata->irq_base + USB_PRES_INTR_OFFSET, 688 pdata->irq_base + USB_INTR_OFFSET); 689 690 if (IS_ERR(child)) 691 return PTR_ERR(child); 692 693 /* we need to connect regulators to this transceiver */ 694 if (twl_has_regulator() && child) { 695 usb1v5.dev = child; 696 usb1v8.dev = child; 697 usb3v1.dev = child; 698 } 699 } 700 701 if (twl_has_watchdog()) { 702 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); 703 if (IS_ERR(child)) 704 return PTR_ERR(child); 705 } 706 707 if (twl_has_pwrbutton()) { 708 child = add_child(1, "twl4030_pwrbutton", 709 NULL, 0, true, pdata->irq_base + 8 + 0, 0); 710 if (IS_ERR(child)) 711 return PTR_ERR(child); 712 } 713 714 if (twl_has_codec() && pdata->codec) { 715 child = add_child(1, "twl4030_codec", 716 pdata->codec, sizeof(*pdata->codec), 717 false, 0, 0); 718 if (IS_ERR(child)) 719 return PTR_ERR(child); 720 } 721 722 /* twl4030 regulators */ 723 if (twl_has_regulator() && twl_class_is_4030()) { 724 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); 725 if (IS_ERR(child)) 726 return PTR_ERR(child); 727 728 child = add_regulator(TWL4030_REG_VIO, pdata->vio); 729 if (IS_ERR(child)) 730 return PTR_ERR(child); 731 732 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1); 733 if (IS_ERR(child)) 734 return PTR_ERR(child); 735 736 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2); 737 if (IS_ERR(child)) 738 return PTR_ERR(child); 739 740 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); 741 if (IS_ERR(child)) 742 return PTR_ERR(child); 743 744 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); 745 if (IS_ERR(child)) 746 return PTR_ERR(child); 747 748 child = add_regulator((features & TWL4030_VAUX2) 749 ? TWL4030_REG_VAUX2_4030 750 : TWL4030_REG_VAUX2, 751 pdata->vaux2); 752 if (IS_ERR(child)) 753 return PTR_ERR(child); 754 755 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1); 756 if (IS_ERR(child)) 757 return PTR_ERR(child); 758 759 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2); 760 if (IS_ERR(child)) 761 return PTR_ERR(child); 762 763 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig); 764 if (IS_ERR(child)) 765 return PTR_ERR(child); 766 } 767 768 /* maybe add LDOs that are omitted on cost-reduced parts */ 769 if (twl_has_regulator() && !(features & TPS_SUBSET) 770 && twl_class_is_4030()) { 771 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); 772 if (IS_ERR(child)) 773 return PTR_ERR(child); 774 775 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); 776 if (IS_ERR(child)) 777 return PTR_ERR(child); 778 779 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); 780 if (IS_ERR(child)) 781 return PTR_ERR(child); 782 783 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); 784 if (IS_ERR(child)) 785 return PTR_ERR(child); 786 787 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); 788 if (IS_ERR(child)) 789 return PTR_ERR(child); 790 791 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); 792 if (IS_ERR(child)) 793 return PTR_ERR(child); 794 } 795 796 /* twl6030 regulators */ 797 if (twl_has_regulator() && twl_class_is_6030()) { 798 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc); 799 if (IS_ERR(child)) 800 return PTR_ERR(child); 801 802 child = add_regulator(TWL6030_REG_VPP, pdata->vpp); 803 if (IS_ERR(child)) 804 return PTR_ERR(child); 805 806 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim); 807 if (IS_ERR(child)) 808 return PTR_ERR(child); 809 810 child = add_regulator(TWL6030_REG_VANA, pdata->vana); 811 if (IS_ERR(child)) 812 return PTR_ERR(child); 813 814 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio); 815 if (IS_ERR(child)) 816 return PTR_ERR(child); 817 818 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac); 819 if (IS_ERR(child)) 820 return PTR_ERR(child); 821 822 child = add_regulator(TWL6030_REG_VUSB, pdata->vusb); 823 if (IS_ERR(child)) 824 return PTR_ERR(child); 825 826 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1); 827 if (IS_ERR(child)) 828 return PTR_ERR(child); 829 830 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2); 831 if (IS_ERR(child)) 832 return PTR_ERR(child); 833 834 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3); 835 if (IS_ERR(child)) 836 return PTR_ERR(child); 837 } 838 839 return 0; 840 } 841 842 /*----------------------------------------------------------------------*/ 843 844 /* 845 * These three functions initialize the on-chip clock framework, 846 * letting it generate the right frequencies for USB, MADC, and 847 * other purposes. 848 */ 849 static inline int __init protect_pm_master(void) 850 { 851 int e = 0; 852 853 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK, 854 R_PROTECT_KEY); 855 return e; 856 } 857 858 static inline int __init unprotect_pm_master(void) 859 { 860 int e = 0; 861 862 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1, 863 R_PROTECT_KEY); 864 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2, 865 R_PROTECT_KEY); 866 return e; 867 } 868 869 static void clocks_init(struct device *dev, 870 struct twl4030_clock_init_data *clock) 871 { 872 int e = 0; 873 struct clk *osc; 874 u32 rate; 875 u8 ctrl = HFCLK_FREQ_26_MHZ; 876 877 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) 878 if (cpu_is_omap2430()) 879 osc = clk_get(dev, "osc_ck"); 880 else 881 osc = clk_get(dev, "osc_sys_ck"); 882 883 if (IS_ERR(osc)) { 884 printk(KERN_WARNING "Skipping twl internal clock init and " 885 "using bootloader value (unknown osc rate)\n"); 886 return; 887 } 888 889 rate = clk_get_rate(osc); 890 clk_put(osc); 891 892 #else 893 /* REVISIT for non-OMAP systems, pass the clock rate from 894 * board init code, using platform_data. 895 */ 896 osc = ERR_PTR(-EIO); 897 898 printk(KERN_WARNING "Skipping twl internal clock init and " 899 "using bootloader value (unknown osc rate)\n"); 900 901 return; 902 #endif 903 904 switch (rate) { 905 case 19200000: 906 ctrl = HFCLK_FREQ_19p2_MHZ; 907 break; 908 case 26000000: 909 ctrl = HFCLK_FREQ_26_MHZ; 910 break; 911 case 38400000: 912 ctrl = HFCLK_FREQ_38p4_MHZ; 913 break; 914 } 915 916 ctrl |= HIGH_PERF_SQ; 917 if (clock && clock->ck32k_lowpwr_enable) 918 ctrl |= CK32K_LOWPWR_EN; 919 920 e |= unprotect_pm_master(); 921 /* effect->MADC+USB ck en */ 922 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); 923 e |= protect_pm_master(); 924 925 if (e < 0) 926 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); 927 } 928 929 /*----------------------------------------------------------------------*/ 930 931 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 932 int twl4030_exit_irq(void); 933 int twl4030_init_chip_irq(const char *chip); 934 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 935 int twl6030_exit_irq(void); 936 937 static int twl_remove(struct i2c_client *client) 938 { 939 unsigned i; 940 int status; 941 942 if (twl_class_is_4030()) 943 status = twl4030_exit_irq(); 944 else 945 status = twl6030_exit_irq(); 946 947 if (status < 0) 948 return status; 949 950 for (i = 0; i < TWL_NUM_SLAVES; i++) { 951 struct twl_client *twl = &twl_modules[i]; 952 953 if (twl->client && twl->client != client) 954 i2c_unregister_device(twl->client); 955 twl_modules[i].client = NULL; 956 } 957 inuse = false; 958 return 0; 959 } 960 961 /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ 962 static int __init 963 twl_probe(struct i2c_client *client, const struct i2c_device_id *id) 964 { 965 int status; 966 unsigned i; 967 struct twl4030_platform_data *pdata = client->dev.platform_data; 968 969 if (!pdata) { 970 dev_dbg(&client->dev, "no platform data?\n"); 971 return -EINVAL; 972 } 973 974 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { 975 dev_dbg(&client->dev, "can't talk I2C?\n"); 976 return -EIO; 977 } 978 979 if (inuse) { 980 dev_dbg(&client->dev, "driver is already in use\n"); 981 return -EBUSY; 982 } 983 984 for (i = 0; i < TWL_NUM_SLAVES; i++) { 985 struct twl_client *twl = &twl_modules[i]; 986 987 twl->address = client->addr + i; 988 if (i == 0) 989 twl->client = client; 990 else { 991 twl->client = i2c_new_dummy(client->adapter, 992 twl->address); 993 if (!twl->client) { 994 dev_err(&client->dev, 995 "can't attach client %d\n", i); 996 status = -ENOMEM; 997 goto fail; 998 } 999 } 1000 mutex_init(&twl->xfer_lock); 1001 } 1002 inuse = true; 1003 if ((id->driver_data) & TWL6030_CLASS) { 1004 twl_id = TWL6030_CLASS_ID; 1005 twl_map = &twl6030_map[0]; 1006 } else { 1007 twl_id = TWL4030_CLASS_ID; 1008 twl_map = &twl4030_map[0]; 1009 } 1010 1011 /* setup clock framework */ 1012 clocks_init(&client->dev, pdata->clock); 1013 1014 /* load power event scripts */ 1015 if (twl_has_power() && pdata->power) 1016 twl4030_power_init(pdata->power); 1017 1018 /* Maybe init the T2 Interrupt subsystem */ 1019 if (client->irq 1020 && pdata->irq_base 1021 && pdata->irq_end > pdata->irq_base) { 1022 if (twl_class_is_4030()) { 1023 twl4030_init_chip_irq(id->name); 1024 status = twl4030_init_irq(client->irq, pdata->irq_base, 1025 pdata->irq_end); 1026 } else { 1027 status = twl6030_init_irq(client->irq, pdata->irq_base, 1028 pdata->irq_end); 1029 } 1030 1031 if (status < 0) 1032 goto fail; 1033 } 1034 1035 status = add_children(pdata, id->driver_data); 1036 fail: 1037 if (status < 0) 1038 twl_remove(client); 1039 return status; 1040 } 1041 1042 static const struct i2c_device_id twl_ids[] = { 1043 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ 1044 { "twl5030", 0 }, /* T2 updated */ 1045 { "twl5031", TWL5031 }, /* TWL5030 updated */ 1046 { "tps65950", 0 }, /* catalog version of twl5030 */ 1047 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ 1048 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ 1049 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ 1050 { /* end of list */ }, 1051 }; 1052 MODULE_DEVICE_TABLE(i2c, twl_ids); 1053 1054 /* One Client Driver , 4 Clients */ 1055 static struct i2c_driver twl_driver = { 1056 .driver.name = DRIVER_NAME, 1057 .id_table = twl_ids, 1058 .probe = twl_probe, 1059 .remove = twl_remove, 1060 }; 1061 1062 static int __init twl_init(void) 1063 { 1064 return i2c_add_driver(&twl_driver); 1065 } 1066 subsys_initcall(twl_init); 1067 1068 static void __exit twl_exit(void) 1069 { 1070 i2c_del_driver(&twl_driver); 1071 } 1072 module_exit(twl_exit); 1073 1074 MODULE_AUTHOR("Texas Instruments, Inc."); 1075 MODULE_DESCRIPTION("I2C Core interface for TWL"); 1076 MODULE_LICENSE("GPL"); 1077