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 defined(CONFIG_SND_SOC_TWL6030) || defined(CONFIG_SND_SOC_TWL6030_MODULE) 120 #define twl_has_codec() true 121 #else 122 #define twl_has_codec() false 123 #endif 124 125 /* Triton Core internal information (BEGIN) */ 126 127 /* Last - for index max*/ 128 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG 129 130 #define TWL_NUM_SLAVES 4 131 132 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \ 133 || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE) 134 #define twl_has_pwrbutton() true 135 #else 136 #define twl_has_pwrbutton() false 137 #endif 138 139 #define SUB_CHIP_ID0 0 140 #define SUB_CHIP_ID1 1 141 #define SUB_CHIP_ID2 2 142 #define SUB_CHIP_ID3 3 143 144 #define TWL_MODULE_LAST TWL4030_MODULE_LAST 145 146 /* Base Address defns for twl4030_map[] */ 147 148 /* subchip/slave 0 - USB ID */ 149 #define TWL4030_BASEADD_USB 0x0000 150 151 /* subchip/slave 1 - AUD ID */ 152 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 153 #define TWL4030_BASEADD_GPIO 0x0098 154 #define TWL4030_BASEADD_INTBR 0x0085 155 #define TWL4030_BASEADD_PIH 0x0080 156 #define TWL4030_BASEADD_TEST 0x004C 157 158 /* subchip/slave 2 - AUX ID */ 159 #define TWL4030_BASEADD_INTERRUPTS 0x00B9 160 #define TWL4030_BASEADD_LED 0x00EE 161 #define TWL4030_BASEADD_MADC 0x0000 162 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 163 #define TWL4030_BASEADD_PRECHARGE 0x00AA 164 #define TWL4030_BASEADD_PWM0 0x00F8 165 #define TWL4030_BASEADD_PWM1 0x00FB 166 #define TWL4030_BASEADD_PWMA 0x00EF 167 #define TWL4030_BASEADD_PWMB 0x00F1 168 #define TWL4030_BASEADD_KEYPAD 0x00D2 169 170 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ 171 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's 172 one */ 173 174 /* subchip/slave 3 - POWER ID */ 175 #define TWL4030_BASEADD_BACKUP 0x0014 176 #define TWL4030_BASEADD_INT 0x002E 177 #define TWL4030_BASEADD_PM_MASTER 0x0036 178 #define TWL4030_BASEADD_PM_RECEIVER 0x005B 179 #define TWL4030_BASEADD_RTC 0x001C 180 #define TWL4030_BASEADD_SECURED_REG 0x0000 181 182 /* Triton Core internal information (END) */ 183 184 185 /* subchip/slave 0 0x48 - POWER */ 186 #define TWL6030_BASEADD_RTC 0x0000 187 #define TWL6030_BASEADD_MEM 0x0017 188 #define TWL6030_BASEADD_PM_MASTER 0x001F 189 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ 190 #define TWL6030_BASEADD_PM_MISC 0x00E2 191 #define TWL6030_BASEADD_PM_PUPD 0x00F0 192 193 /* subchip/slave 1 0x49 - FEATURE */ 194 #define TWL6030_BASEADD_USB 0x0000 195 #define TWL6030_BASEADD_GPADC_CTRL 0x002E 196 #define TWL6030_BASEADD_AUX 0x0090 197 #define TWL6030_BASEADD_PWM 0x00BA 198 #define TWL6030_BASEADD_GASGAUGE 0x00C0 199 #define TWL6030_BASEADD_PIH 0x00D0 200 #define TWL6030_BASEADD_CHARGER 0x00E0 201 202 /* subchip/slave 2 0x4A - DFT */ 203 #define TWL6030_BASEADD_DIEID 0x00C0 204 205 /* subchip/slave 3 0x4B - AUDIO */ 206 #define TWL6030_BASEADD_AUDIO 0x0000 207 #define TWL6030_BASEADD_RSV 0x0000 208 209 /* Few power values */ 210 #define R_CFG_BOOT 0x05 211 #define R_PROTECT_KEY 0x0E 212 213 /* access control values for R_PROTECT_KEY */ 214 #define KEY_UNLOCK1 0xce 215 #define KEY_UNLOCK2 0xec 216 #define KEY_LOCK 0x00 217 218 /* some fields in R_CFG_BOOT */ 219 #define HFCLK_FREQ_19p2_MHZ (1 << 0) 220 #define HFCLK_FREQ_26_MHZ (2 << 0) 221 #define HFCLK_FREQ_38p4_MHZ (3 << 0) 222 #define HIGH_PERF_SQ (1 << 3) 223 #define CK32K_LOWPWR_EN (1 << 7) 224 225 226 /* chip-specific feature flags, for i2c_device_id.driver_data */ 227 #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ 228 #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ 229 #define TWL5031 BIT(2) /* twl5031 has different registers */ 230 #define TWL6030_CLASS BIT(3) /* TWL6030 class */ 231 232 /*----------------------------------------------------------------------*/ 233 234 /* is driver active, bound to a chip? */ 235 static bool inuse; 236 237 static unsigned int twl_id; 238 unsigned int twl_rev(void) 239 { 240 return twl_id; 241 } 242 EXPORT_SYMBOL(twl_rev); 243 244 /* Structure for each TWL4030/TWL6030 Slave */ 245 struct twl_client { 246 struct i2c_client *client; 247 u8 address; 248 249 /* max numb of i2c_msg required is for read =2 */ 250 struct i2c_msg xfer_msg[2]; 251 252 /* To lock access to xfer_msg */ 253 struct mutex xfer_lock; 254 }; 255 256 static struct twl_client twl_modules[TWL_NUM_SLAVES]; 257 258 259 /* mapping the module id to slave id and base address */ 260 struct twl_mapping { 261 unsigned char sid; /* Slave ID */ 262 unsigned char base; /* base address */ 263 }; 264 struct twl_mapping *twl_map; 265 266 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { 267 /* 268 * NOTE: don't change this table without updating the 269 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 270 * so they continue to match the order in this table. 271 */ 272 273 { 0, TWL4030_BASEADD_USB }, 274 275 { 1, TWL4030_BASEADD_AUDIO_VOICE }, 276 { 1, TWL4030_BASEADD_GPIO }, 277 { 1, TWL4030_BASEADD_INTBR }, 278 { 1, TWL4030_BASEADD_PIH }, 279 { 1, TWL4030_BASEADD_TEST }, 280 281 { 2, TWL4030_BASEADD_KEYPAD }, 282 { 2, TWL4030_BASEADD_MADC }, 283 { 2, TWL4030_BASEADD_INTERRUPTS }, 284 { 2, TWL4030_BASEADD_LED }, 285 { 2, TWL4030_BASEADD_MAIN_CHARGE }, 286 { 2, TWL4030_BASEADD_PRECHARGE }, 287 { 2, TWL4030_BASEADD_PWM0 }, 288 { 2, TWL4030_BASEADD_PWM1 }, 289 { 2, TWL4030_BASEADD_PWMA }, 290 { 2, TWL4030_BASEADD_PWMB }, 291 { 2, TWL5031_BASEADD_ACCESSORY }, 292 { 2, TWL5031_BASEADD_INTERRUPTS }, 293 294 { 3, TWL4030_BASEADD_BACKUP }, 295 { 3, TWL4030_BASEADD_INT }, 296 { 3, TWL4030_BASEADD_PM_MASTER }, 297 { 3, TWL4030_BASEADD_PM_RECEIVER }, 298 { 3, TWL4030_BASEADD_RTC }, 299 { 3, TWL4030_BASEADD_SECURED_REG }, 300 }; 301 302 static struct twl_mapping twl6030_map[] = { 303 /* 304 * NOTE: don't change this table without updating the 305 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 306 * so they continue to match the order in this table. 307 */ 308 { SUB_CHIP_ID1, TWL6030_BASEADD_USB }, 309 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO }, 310 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID }, 311 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 312 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH }, 313 314 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 315 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 316 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL }, 317 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 318 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 319 320 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER }, 321 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE }, 322 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM }, 323 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 324 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 325 326 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 327 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 328 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 329 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER }, 330 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC }, 331 332 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC }, 333 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM }, 334 }; 335 336 /*----------------------------------------------------------------------*/ 337 338 /* Exported Functions */ 339 340 /** 341 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 342 * @mod_no: module number 343 * @value: an array of num_bytes+1 containing data to write 344 * @reg: register address (just offset will do) 345 * @num_bytes: number of bytes to transfer 346 * 347 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and 348 * valid data starts at Offset 1. 349 * 350 * Returns the result of operation - 0 is success 351 */ 352 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 353 { 354 int ret; 355 int sid; 356 struct twl_client *twl; 357 struct i2c_msg *msg; 358 359 if (unlikely(mod_no > TWL_MODULE_LAST)) { 360 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 361 return -EPERM; 362 } 363 sid = twl_map[mod_no].sid; 364 twl = &twl_modules[sid]; 365 366 if (unlikely(!inuse)) { 367 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 368 return -EPERM; 369 } 370 mutex_lock(&twl->xfer_lock); 371 /* 372 * [MSG1]: fill the register address data 373 * fill the data Tx buffer 374 */ 375 msg = &twl->xfer_msg[0]; 376 msg->addr = twl->address; 377 msg->len = num_bytes + 1; 378 msg->flags = 0; 379 msg->buf = value; 380 /* over write the first byte of buffer with the register address */ 381 *value = twl_map[mod_no].base + reg; 382 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); 383 mutex_unlock(&twl->xfer_lock); 384 385 /* i2c_transfer returns number of messages transferred */ 386 if (ret != 1) { 387 pr_err("%s: i2c_write failed to transfer all messages\n", 388 DRIVER_NAME); 389 if (ret < 0) 390 return ret; 391 else 392 return -EIO; 393 } else { 394 return 0; 395 } 396 } 397 EXPORT_SYMBOL(twl_i2c_write); 398 399 /** 400 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 401 * @mod_no: module number 402 * @value: an array of num_bytes containing data to be read 403 * @reg: register address (just offset will do) 404 * @num_bytes: number of bytes to transfer 405 * 406 * Returns result of operation - num_bytes is success else failure. 407 */ 408 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 409 { 410 int ret; 411 u8 val; 412 int sid; 413 struct twl_client *twl; 414 struct i2c_msg *msg; 415 416 if (unlikely(mod_no > TWL_MODULE_LAST)) { 417 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 418 return -EPERM; 419 } 420 sid = twl_map[mod_no].sid; 421 twl = &twl_modules[sid]; 422 423 if (unlikely(!inuse)) { 424 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 425 return -EPERM; 426 } 427 mutex_lock(&twl->xfer_lock); 428 /* [MSG1] fill the register address data */ 429 msg = &twl->xfer_msg[0]; 430 msg->addr = twl->address; 431 msg->len = 1; 432 msg->flags = 0; /* Read the register value */ 433 val = twl_map[mod_no].base + reg; 434 msg->buf = &val; 435 /* [MSG2] fill the data rx buffer */ 436 msg = &twl->xfer_msg[1]; 437 msg->addr = twl->address; 438 msg->flags = I2C_M_RD; /* Read the register value */ 439 msg->len = num_bytes; /* only n bytes */ 440 msg->buf = value; 441 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); 442 mutex_unlock(&twl->xfer_lock); 443 444 /* i2c_transfer returns number of messages transferred */ 445 if (ret != 2) { 446 pr_err("%s: i2c_read failed to transfer all messages\n", 447 DRIVER_NAME); 448 if (ret < 0) 449 return ret; 450 else 451 return -EIO; 452 } else { 453 return 0; 454 } 455 } 456 EXPORT_SYMBOL(twl_i2c_read); 457 458 /** 459 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0 460 * @mod_no: module number 461 * @value: the value to be written 8 bit 462 * @reg: register address (just offset will do) 463 * 464 * Returns result of operation - 0 is success 465 */ 466 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg) 467 { 468 469 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ 470 u8 temp_buffer[2] = { 0 }; 471 /* offset 1 contains the data */ 472 temp_buffer[1] = value; 473 return twl_i2c_write(mod_no, temp_buffer, reg, 1); 474 } 475 EXPORT_SYMBOL(twl_i2c_write_u8); 476 477 /** 478 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0 479 * @mod_no: module number 480 * @value: the value read 8 bit 481 * @reg: register address (just offset will do) 482 * 483 * Returns result of operation - 0 is success 484 */ 485 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) 486 { 487 return twl_i2c_read(mod_no, value, reg, 1); 488 } 489 EXPORT_SYMBOL(twl_i2c_read_u8); 490 491 /*----------------------------------------------------------------------*/ 492 493 static struct device * 494 add_numbered_child(unsigned chip, const char *name, int num, 495 void *pdata, unsigned pdata_len, 496 bool can_wakeup, int irq0, int irq1) 497 { 498 struct platform_device *pdev; 499 struct twl_client *twl = &twl_modules[chip]; 500 int status; 501 502 pdev = platform_device_alloc(name, num); 503 if (!pdev) { 504 dev_dbg(&twl->client->dev, "can't alloc dev\n"); 505 status = -ENOMEM; 506 goto err; 507 } 508 509 device_init_wakeup(&pdev->dev, can_wakeup); 510 pdev->dev.parent = &twl->client->dev; 511 512 if (pdata) { 513 status = platform_device_add_data(pdev, pdata, pdata_len); 514 if (status < 0) { 515 dev_dbg(&pdev->dev, "can't add platform_data\n"); 516 goto err; 517 } 518 } 519 520 if (irq0) { 521 struct resource r[2] = { 522 { .start = irq0, .flags = IORESOURCE_IRQ, }, 523 { .start = irq1, .flags = IORESOURCE_IRQ, }, 524 }; 525 526 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); 527 if (status < 0) { 528 dev_dbg(&pdev->dev, "can't add irqs\n"); 529 goto err; 530 } 531 } 532 533 status = platform_device_add(pdev); 534 535 err: 536 if (status < 0) { 537 platform_device_put(pdev); 538 dev_err(&twl->client->dev, "can't add %s dev\n", name); 539 return ERR_PTR(status); 540 } 541 return &pdev->dev; 542 } 543 544 static inline struct device *add_child(unsigned chip, const char *name, 545 void *pdata, unsigned pdata_len, 546 bool can_wakeup, int irq0, int irq1) 547 { 548 return add_numbered_child(chip, name, -1, pdata, pdata_len, 549 can_wakeup, irq0, irq1); 550 } 551 552 static struct device * 553 add_regulator_linked(int num, struct regulator_init_data *pdata, 554 struct regulator_consumer_supply *consumers, 555 unsigned num_consumers) 556 { 557 unsigned sub_chip_id; 558 /* regulator framework demands init_data ... */ 559 if (!pdata) 560 return NULL; 561 562 if (consumers) { 563 pdata->consumer_supplies = consumers; 564 pdata->num_consumer_supplies = num_consumers; 565 } 566 567 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ 568 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid; 569 return add_numbered_child(sub_chip_id, "twl_reg", num, 570 pdata, sizeof(*pdata), false, 0, 0); 571 } 572 573 static struct device * 574 add_regulator(int num, struct regulator_init_data *pdata) 575 { 576 return add_regulator_linked(num, pdata, NULL, 0); 577 } 578 579 /* 580 * NOTE: We know the first 8 IRQs after pdata->base_irq are 581 * for the PIH, and the next are for the PWR_INT SIH, since 582 * that's how twl_init_irq() sets things up. 583 */ 584 585 static int 586 add_children(struct twl4030_platform_data *pdata, unsigned long features) 587 { 588 struct device *child; 589 unsigned sub_chip_id; 590 591 if (twl_has_bci() && pdata->bci && 592 !(features & (TPS_SUBSET | TWL5031))) { 593 child = add_child(3, "twl4030_bci", 594 pdata->bci, sizeof(*pdata->bci), 595 false, 596 /* irq0 = CHG_PRES, irq1 = BCI */ 597 pdata->irq_base + BCI_PRES_INTR_OFFSET, 598 pdata->irq_base + BCI_INTR_OFFSET); 599 if (IS_ERR(child)) 600 return PTR_ERR(child); 601 } 602 603 if (twl_has_gpio() && pdata->gpio) { 604 child = add_child(SUB_CHIP_ID1, "twl4030_gpio", 605 pdata->gpio, sizeof(*pdata->gpio), 606 false, pdata->irq_base + GPIO_INTR_OFFSET, 0); 607 if (IS_ERR(child)) 608 return PTR_ERR(child); 609 } 610 611 if (twl_has_keypad() && pdata->keypad) { 612 child = add_child(SUB_CHIP_ID2, "twl4030_keypad", 613 pdata->keypad, sizeof(*pdata->keypad), 614 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0); 615 if (IS_ERR(child)) 616 return PTR_ERR(child); 617 } 618 619 if (twl_has_madc() && pdata->madc) { 620 child = add_child(2, "twl4030_madc", 621 pdata->madc, sizeof(*pdata->madc), 622 true, pdata->irq_base + MADC_INTR_OFFSET, 0); 623 if (IS_ERR(child)) 624 return PTR_ERR(child); 625 } 626 627 if (twl_has_rtc()) { 628 /* 629 * REVISIT platform_data here currently might expose the 630 * "msecure" line ... but for now we just expect board 631 * setup to tell the chip "it's always ok to SET_TIME". 632 * Eventually, Linux might become more aware of such 633 * HW security concerns, and "least privilege". 634 */ 635 sub_chip_id = twl_map[TWL_MODULE_RTC].sid; 636 child = add_child(sub_chip_id, "twl_rtc", 637 NULL, 0, 638 true, pdata->irq_base + RTC_INTR_OFFSET, 0); 639 if (IS_ERR(child)) 640 return PTR_ERR(child); 641 } 642 643 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) { 644 645 static struct regulator_consumer_supply usb1v5 = { 646 .supply = "usb1v5", 647 }; 648 static struct regulator_consumer_supply usb1v8 = { 649 .supply = "usb1v8", 650 }; 651 static struct regulator_consumer_supply usb3v1 = { 652 .supply = "usb3v1", 653 }; 654 655 /* First add the regulators so that they can be used by transceiver */ 656 if (twl_has_regulator()) { 657 /* this is a template that gets copied */ 658 struct regulator_init_data usb_fixed = { 659 .constraints.valid_modes_mask = 660 REGULATOR_MODE_NORMAL 661 | REGULATOR_MODE_STANDBY, 662 .constraints.valid_ops_mask = 663 REGULATOR_CHANGE_MODE 664 | REGULATOR_CHANGE_STATUS, 665 }; 666 667 child = add_regulator_linked(TWL4030_REG_VUSB1V5, 668 &usb_fixed, &usb1v5, 1); 669 if (IS_ERR(child)) 670 return PTR_ERR(child); 671 672 child = add_regulator_linked(TWL4030_REG_VUSB1V8, 673 &usb_fixed, &usb1v8, 1); 674 if (IS_ERR(child)) 675 return PTR_ERR(child); 676 677 child = add_regulator_linked(TWL4030_REG_VUSB3V1, 678 &usb_fixed, &usb3v1, 1); 679 if (IS_ERR(child)) 680 return PTR_ERR(child); 681 682 } 683 684 child = add_child(0, "twl4030_usb", 685 pdata->usb, sizeof(*pdata->usb), 686 true, 687 /* irq0 = USB_PRES, irq1 = USB */ 688 pdata->irq_base + USB_PRES_INTR_OFFSET, 689 pdata->irq_base + USB_INTR_OFFSET); 690 691 if (IS_ERR(child)) 692 return PTR_ERR(child); 693 694 /* we need to connect regulators to this transceiver */ 695 if (twl_has_regulator() && child) { 696 usb1v5.dev = child; 697 usb1v8.dev = child; 698 usb3v1.dev = child; 699 } 700 } 701 702 if (twl_has_watchdog()) { 703 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); 704 if (IS_ERR(child)) 705 return PTR_ERR(child); 706 } 707 708 if (twl_has_pwrbutton()) { 709 child = add_child(1, "twl4030_pwrbutton", 710 NULL, 0, true, pdata->irq_base + 8 + 0, 0); 711 if (IS_ERR(child)) 712 return PTR_ERR(child); 713 } 714 715 if (twl_has_codec() && pdata->codec && twl_class_is_4030()) { 716 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid; 717 child = add_child(sub_chip_id, "twl4030_codec", 718 pdata->codec, sizeof(*pdata->codec), 719 false, 0, 0); 720 if (IS_ERR(child)) 721 return PTR_ERR(child); 722 } 723 724 /* Phoenix*/ 725 if (twl_has_codec() && pdata->codec && twl_class_is_6030()) { 726 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid; 727 child = add_child(sub_chip_id, "twl6030_codec", 728 pdata->codec, sizeof(*pdata->codec), 729 false, 0, 0); 730 if (IS_ERR(child)) 731 return PTR_ERR(child); 732 } 733 734 /* twl4030 regulators */ 735 if (twl_has_regulator() && twl_class_is_4030()) { 736 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); 737 if (IS_ERR(child)) 738 return PTR_ERR(child); 739 740 child = add_regulator(TWL4030_REG_VIO, pdata->vio); 741 if (IS_ERR(child)) 742 return PTR_ERR(child); 743 744 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1); 745 if (IS_ERR(child)) 746 return PTR_ERR(child); 747 748 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2); 749 if (IS_ERR(child)) 750 return PTR_ERR(child); 751 752 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); 753 if (IS_ERR(child)) 754 return PTR_ERR(child); 755 756 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); 757 if (IS_ERR(child)) 758 return PTR_ERR(child); 759 760 child = add_regulator((features & TWL4030_VAUX2) 761 ? TWL4030_REG_VAUX2_4030 762 : TWL4030_REG_VAUX2, 763 pdata->vaux2); 764 if (IS_ERR(child)) 765 return PTR_ERR(child); 766 767 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1); 768 if (IS_ERR(child)) 769 return PTR_ERR(child); 770 771 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2); 772 if (IS_ERR(child)) 773 return PTR_ERR(child); 774 775 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig); 776 if (IS_ERR(child)) 777 return PTR_ERR(child); 778 } 779 780 /* maybe add LDOs that are omitted on cost-reduced parts */ 781 if (twl_has_regulator() && !(features & TPS_SUBSET) 782 && twl_class_is_4030()) { 783 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); 784 if (IS_ERR(child)) 785 return PTR_ERR(child); 786 787 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); 788 if (IS_ERR(child)) 789 return PTR_ERR(child); 790 791 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); 792 if (IS_ERR(child)) 793 return PTR_ERR(child); 794 795 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); 796 if (IS_ERR(child)) 797 return PTR_ERR(child); 798 799 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); 800 if (IS_ERR(child)) 801 return PTR_ERR(child); 802 803 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); 804 if (IS_ERR(child)) 805 return PTR_ERR(child); 806 } 807 808 /* twl6030 regulators */ 809 if (twl_has_regulator() && twl_class_is_6030()) { 810 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc); 811 if (IS_ERR(child)) 812 return PTR_ERR(child); 813 814 child = add_regulator(TWL6030_REG_VPP, pdata->vpp); 815 if (IS_ERR(child)) 816 return PTR_ERR(child); 817 818 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim); 819 if (IS_ERR(child)) 820 return PTR_ERR(child); 821 822 child = add_regulator(TWL6030_REG_VANA, pdata->vana); 823 if (IS_ERR(child)) 824 return PTR_ERR(child); 825 826 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio); 827 if (IS_ERR(child)) 828 return PTR_ERR(child); 829 830 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac); 831 if (IS_ERR(child)) 832 return PTR_ERR(child); 833 834 child = add_regulator(TWL6030_REG_VUSB, pdata->vusb); 835 if (IS_ERR(child)) 836 return PTR_ERR(child); 837 838 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1); 839 if (IS_ERR(child)) 840 return PTR_ERR(child); 841 842 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2); 843 if (IS_ERR(child)) 844 return PTR_ERR(child); 845 846 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3); 847 if (IS_ERR(child)) 848 return PTR_ERR(child); 849 } 850 851 return 0; 852 } 853 854 /*----------------------------------------------------------------------*/ 855 856 /* 857 * These three functions initialize the on-chip clock framework, 858 * letting it generate the right frequencies for USB, MADC, and 859 * other purposes. 860 */ 861 static inline int __init protect_pm_master(void) 862 { 863 int e = 0; 864 865 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK, 866 R_PROTECT_KEY); 867 return e; 868 } 869 870 static inline int __init unprotect_pm_master(void) 871 { 872 int e = 0; 873 874 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1, 875 R_PROTECT_KEY); 876 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2, 877 R_PROTECT_KEY); 878 return e; 879 } 880 881 static void clocks_init(struct device *dev, 882 struct twl4030_clock_init_data *clock) 883 { 884 int e = 0; 885 struct clk *osc; 886 u32 rate; 887 u8 ctrl = HFCLK_FREQ_26_MHZ; 888 889 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) 890 if (cpu_is_omap2430()) 891 osc = clk_get(dev, "osc_ck"); 892 else 893 osc = clk_get(dev, "osc_sys_ck"); 894 895 if (IS_ERR(osc)) { 896 printk(KERN_WARNING "Skipping twl internal clock init and " 897 "using bootloader value (unknown osc rate)\n"); 898 return; 899 } 900 901 rate = clk_get_rate(osc); 902 clk_put(osc); 903 904 #else 905 /* REVISIT for non-OMAP systems, pass the clock rate from 906 * board init code, using platform_data. 907 */ 908 osc = ERR_PTR(-EIO); 909 910 printk(KERN_WARNING "Skipping twl internal clock init and " 911 "using bootloader value (unknown osc rate)\n"); 912 913 return; 914 #endif 915 916 switch (rate) { 917 case 19200000: 918 ctrl = HFCLK_FREQ_19p2_MHZ; 919 break; 920 case 26000000: 921 ctrl = HFCLK_FREQ_26_MHZ; 922 break; 923 case 38400000: 924 ctrl = HFCLK_FREQ_38p4_MHZ; 925 break; 926 } 927 928 ctrl |= HIGH_PERF_SQ; 929 if (clock && clock->ck32k_lowpwr_enable) 930 ctrl |= CK32K_LOWPWR_EN; 931 932 e |= unprotect_pm_master(); 933 /* effect->MADC+USB ck en */ 934 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); 935 e |= protect_pm_master(); 936 937 if (e < 0) 938 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); 939 } 940 941 /*----------------------------------------------------------------------*/ 942 943 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 944 int twl4030_exit_irq(void); 945 int twl4030_init_chip_irq(const char *chip); 946 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 947 int twl6030_exit_irq(void); 948 949 static int twl_remove(struct i2c_client *client) 950 { 951 unsigned i; 952 int status; 953 954 if (twl_class_is_4030()) 955 status = twl4030_exit_irq(); 956 else 957 status = twl6030_exit_irq(); 958 959 if (status < 0) 960 return status; 961 962 for (i = 0; i < TWL_NUM_SLAVES; i++) { 963 struct twl_client *twl = &twl_modules[i]; 964 965 if (twl->client && twl->client != client) 966 i2c_unregister_device(twl->client); 967 twl_modules[i].client = NULL; 968 } 969 inuse = false; 970 return 0; 971 } 972 973 /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ 974 static int __init 975 twl_probe(struct i2c_client *client, const struct i2c_device_id *id) 976 { 977 int status; 978 unsigned i; 979 struct twl4030_platform_data *pdata = client->dev.platform_data; 980 981 if (!pdata) { 982 dev_dbg(&client->dev, "no platform data?\n"); 983 return -EINVAL; 984 } 985 986 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { 987 dev_dbg(&client->dev, "can't talk I2C?\n"); 988 return -EIO; 989 } 990 991 if (inuse) { 992 dev_dbg(&client->dev, "driver is already in use\n"); 993 return -EBUSY; 994 } 995 996 for (i = 0; i < TWL_NUM_SLAVES; i++) { 997 struct twl_client *twl = &twl_modules[i]; 998 999 twl->address = client->addr + i; 1000 if (i == 0) 1001 twl->client = client; 1002 else { 1003 twl->client = i2c_new_dummy(client->adapter, 1004 twl->address); 1005 if (!twl->client) { 1006 dev_err(&client->dev, 1007 "can't attach client %d\n", i); 1008 status = -ENOMEM; 1009 goto fail; 1010 } 1011 } 1012 mutex_init(&twl->xfer_lock); 1013 } 1014 inuse = true; 1015 if ((id->driver_data) & TWL6030_CLASS) { 1016 twl_id = TWL6030_CLASS_ID; 1017 twl_map = &twl6030_map[0]; 1018 } else { 1019 twl_id = TWL4030_CLASS_ID; 1020 twl_map = &twl4030_map[0]; 1021 } 1022 1023 /* setup clock framework */ 1024 clocks_init(&client->dev, pdata->clock); 1025 1026 /* load power event scripts */ 1027 if (twl_has_power() && pdata->power) 1028 twl4030_power_init(pdata->power); 1029 1030 /* Maybe init the T2 Interrupt subsystem */ 1031 if (client->irq 1032 && pdata->irq_base 1033 && pdata->irq_end > pdata->irq_base) { 1034 if (twl_class_is_4030()) { 1035 twl4030_init_chip_irq(id->name); 1036 status = twl4030_init_irq(client->irq, pdata->irq_base, 1037 pdata->irq_end); 1038 } else { 1039 status = twl6030_init_irq(client->irq, pdata->irq_base, 1040 pdata->irq_end); 1041 } 1042 1043 if (status < 0) 1044 goto fail; 1045 } 1046 1047 status = add_children(pdata, id->driver_data); 1048 fail: 1049 if (status < 0) 1050 twl_remove(client); 1051 return status; 1052 } 1053 1054 static const struct i2c_device_id twl_ids[] = { 1055 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ 1056 { "twl5030", 0 }, /* T2 updated */ 1057 { "twl5031", TWL5031 }, /* TWL5030 updated */ 1058 { "tps65950", 0 }, /* catalog version of twl5030 */ 1059 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ 1060 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ 1061 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ 1062 { /* end of list */ }, 1063 }; 1064 MODULE_DEVICE_TABLE(i2c, twl_ids); 1065 1066 /* One Client Driver , 4 Clients */ 1067 static struct i2c_driver twl_driver = { 1068 .driver.name = DRIVER_NAME, 1069 .id_table = twl_ids, 1070 .probe = twl_probe, 1071 .remove = twl_remove, 1072 }; 1073 1074 static int __init twl_init(void) 1075 { 1076 return i2c_add_driver(&twl_driver); 1077 } 1078 subsys_initcall(twl_init); 1079 1080 static void __exit twl_exit(void) 1081 { 1082 i2c_del_driver(&twl_driver); 1083 } 1084 module_exit(twl_exit); 1085 1086 MODULE_AUTHOR("Texas Instruments, Inc."); 1087 MODULE_DESCRIPTION("I2C Core interface for TWL"); 1088 MODULE_LICENSE("GPL"); 1089