drivers/mfd/twl4030-core.c

   1 /*
   2  * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
   3  *
   4  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   5  *
   6  * Modifications to defer interrupt handling to a kernel thread:
   7  * Copyright (C) 2006 MontaVista Software, Inc.
   8  *
   9  * Based on tlv320aic23.c:
  10  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
  11  *
  12  * Code cleanup and modifications to IRQ handler.
  13  * by syed khasim <x0khasim@ti.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  28  */
  29
  30 #include <linux/init.h>
  31 #include <linux/mutex.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/clk.h>
  34 #include <linux/err.h>
  35
  36 #include <linux/regulator/machine.h>
  37
  38 #include <linux/i2c.h>
  39 #include <linux/i2c/twl4030.h>
  40 #include <plat/board.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                     "twl4030"
  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 /* Triton Core internal information (BEGIN) */
 119
 120 /* Last - for index max*/
 121 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 122
 123 #define TWL4030_NUM_SLAVES              4
 124
 125 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 126         || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
 127 #define twl_has_pwrbutton()     true
 128 #else
 129 #define twl_has_pwrbutton()     false
 130 #endif
 131
 132 /* Base Address defns for twl4030_map[] */
 133
 134 /* subchip/slave 0 - USB ID */
 135 #define TWL4030_BASEADD_USB             0x0000
 136
 137 /* subchip/slave 1 - AUD ID */
 138 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 139 #define TWL4030_BASEADD_GPIO            0x0098
 140 #define TWL4030_BASEADD_INTBR           0x0085
 141 #define TWL4030_BASEADD_PIH             0x0080
 142 #define TWL4030_BASEADD_TEST            0x004C
 143
 144 /* subchip/slave 2 - AUX ID */
 145 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 146 #define TWL4030_BASEADD_LED             0x00EE
 147 #define TWL4030_BASEADD_MADC            0x0000
 148 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 149 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 150 #define TWL4030_BASEADD_PWM0            0x00F8
 151 #define TWL4030_BASEADD_PWM1            0x00FB
 152 #define TWL4030_BASEADD_PWMA            0x00EF
 153 #define TWL4030_BASEADD_PWMB            0x00F1
 154 #define TWL4030_BASEADD_KEYPAD          0x00D2
 155
 156 /* subchip/slave 3 - POWER ID */
 157 #define TWL4030_BASEADD_BACKUP          0x0014
 158 #define TWL4030_BASEADD_INT             0x002E
 159 #define TWL4030_BASEADD_PM_MASTER       0x0036
 160 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 161 #define TWL4030_BASEADD_RTC             0x001C
 162 #define TWL4030_BASEADD_SECURED_REG     0x0000
 163
 164 /* Triton Core internal information (END) */
 165
 166
 167 /* Few power values */
 168 #define R_CFG_BOOT                      0x05
 169 #define R_PROTECT_KEY                   0x0E
 170
 171 /* access control values for R_PROTECT_KEY */
 172 #define KEY_UNLOCK1                     0xce
 173 #define KEY_UNLOCK2                     0xec
 174 #define KEY_LOCK                        0x00
 175
 176 /* some fields in R_CFG_BOOT */
 177 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 178 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 179 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 180 #define HIGH_PERF_SQ                    (1 << 3)
 181
 182
 183 /* chip-specific feature flags, for i2c_device_id.driver_data */
 184 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 185 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 186
 187 /*----------------------------------------------------------------------*/
 188
 189 /* is driver active, bound to a chip? */
 190 static bool inuse;
 191
 192 /* Structure for each TWL4030 Slave */
 193 struct twl4030_client {
 194         struct i2c_client *client;
 195         u8 address;
 196
 197         /* max numb of i2c_msg required is for read =2 */
 198         struct i2c_msg xfer_msg[2];
 199
 200         /* To lock access to xfer_msg */
 201         struct mutex xfer_lock;
 202 };
 203
 204 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 205
 206
 207 /* mapping the module id to slave id and base address */
 208 struct twl4030mapping {
 209         unsigned char sid;      /* Slave ID */
 210         unsigned char base;     /* base address */
 211 };
 212
 213 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 214         /*
 215          * NOTE:  don't change this table without updating the
 216          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 217          * so they continue to match the order in this table.
 218          */
 219
 220         { 0, TWL4030_BASEADD_USB },
 221
 222         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 223         { 1, TWL4030_BASEADD_GPIO },
 224         { 1, TWL4030_BASEADD_INTBR },
 225         { 1, TWL4030_BASEADD_PIH },
 226         { 1, TWL4030_BASEADD_TEST },
 227
 228         { 2, TWL4030_BASEADD_KEYPAD },
 229         { 2, TWL4030_BASEADD_MADC },
 230         { 2, TWL4030_BASEADD_INTERRUPTS },
 231         { 2, TWL4030_BASEADD_LED },
 232         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 233         { 2, TWL4030_BASEADD_PRECHARGE },
 234         { 2, TWL4030_BASEADD_PWM0 },
 235         { 2, TWL4030_BASEADD_PWM1 },
 236         { 2, TWL4030_BASEADD_PWMA },
 237         { 2, TWL4030_BASEADD_PWMB },
 238
 239         { 3, TWL4030_BASEADD_BACKUP },
 240         { 3, TWL4030_BASEADD_INT },
 241         { 3, TWL4030_BASEADD_PM_MASTER },
 242         { 3, TWL4030_BASEADD_PM_RECEIVER },
 243         { 3, TWL4030_BASEADD_RTC },
 244         { 3, TWL4030_BASEADD_SECURED_REG },
 245 };
 246
 247 /*----------------------------------------------------------------------*/
 248
 249 /* Exported Functions */
 250
 251 /**
 252  * twl4030_i2c_write - Writes a n bit register in TWL4030
 253  * @mod_no: module number
 254  * @value: an array of num_bytes+1 containing data to write
 255  * @reg: register address (just offset will do)
 256  * @num_bytes: number of bytes to transfer
 257  *
 258  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 259  * valid data starts at Offset 1.
 260  *
 261  * Returns the result of operation - 0 is success
 262  */
 263 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 264 {
 265         int ret;
 266         int sid;
 267         struct twl4030_client *twl;
 268         struct i2c_msg *msg;
 269
 270         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 271                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 272                 return -EPERM;
 273         }
 274         sid = twl4030_map[mod_no].sid;
 275         twl = &twl4030_modules[sid];
 276
 277         if (unlikely(!inuse)) {
 278                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 279                 return -EPERM;
 280         }
 281         mutex_lock(&twl->xfer_lock);
 282         /*
 283          * [MSG1]: fill the register address data
 284          * fill the data Tx buffer
 285          */
 286         msg = &twl->xfer_msg[0];
 287         msg->addr = twl->address;
 288         msg->len = num_bytes + 1;
 289         msg->flags = 0;
 290         msg->buf = value;
 291         /* over write the first byte of buffer with the register address */
 292         *value = twl4030_map[mod_no].base + reg;
 293         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 294         mutex_unlock(&twl->xfer_lock);
 295
 296         /* i2cTransfer returns num messages.translate it pls.. */
 297         if (ret >= 0)
 298                 ret = 0;
 299         return ret;
 300 }
 301 EXPORT_SYMBOL(twl4030_i2c_write);
 302
 303 /**
 304  * twl4030_i2c_read - Reads a n bit register in TWL4030
 305  * @mod_no: module number
 306  * @value: an array of num_bytes containing data to be read
 307  * @reg: register address (just offset will do)
 308  * @num_bytes: number of bytes to transfer
 309  *
 310  * Returns result of operation - num_bytes is success else failure.
 311  */
 312 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 313 {
 314         int ret;
 315         u8 val;
 316         int sid;
 317         struct twl4030_client *twl;
 318         struct i2c_msg *msg;
 319
 320         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 321                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 322                 return -EPERM;
 323         }
 324         sid = twl4030_map[mod_no].sid;
 325         twl = &twl4030_modules[sid];
 326
 327         if (unlikely(!inuse)) {
 328                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 329                 return -EPERM;
 330         }
 331         mutex_lock(&twl->xfer_lock);
 332         /* [MSG1] fill the register address data */
 333         msg = &twl->xfer_msg[0];
 334         msg->addr = twl->address;
 335         msg->len = 1;
 336         msg->flags = 0; /* Read the register value */
 337         val = twl4030_map[mod_no].base + reg;
 338         msg->buf = &val;
 339         /* [MSG2] fill the data rx buffer */
 340         msg = &twl->xfer_msg[1];
 341         msg->addr = twl->address;
 342         msg->flags = I2C_M_RD;  /* Read the register value */
 343         msg->len = num_bytes;   /* only n bytes */
 344         msg->buf = value;
 345         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 346         mutex_unlock(&twl->xfer_lock);
 347
 348         /* i2cTransfer returns num messages.translate it pls.. */
 349         if (ret >= 0)
 350                 ret = 0;
 351         return ret;
 352 }
 353 EXPORT_SYMBOL(twl4030_i2c_read);
 354
 355 /**
 356  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 357  * @mod_no: module number
 358  * @value: the value to be written 8 bit
 359  * @reg: register address (just offset will do)
 360  *
 361  * Returns result of operation - 0 is success
 362  */
 363 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 364 {
 365
 366         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 367         u8 temp_buffer[2] = { 0 };
 368         /* offset 1 contains the data */
 369         temp_buffer[1] = value;
 370         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 371 }
 372 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 373
 374 /**
 375  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 376  * @mod_no: module number
 377  * @value: the value read 8 bit
 378  * @reg: register address (just offset will do)
 379  *
 380  * Returns result of operation - 0 is success
 381  */
 382 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 383 {
 384         return twl4030_i2c_read(mod_no, value, reg, 1);
 385 }
 386 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 387
 388 /*----------------------------------------------------------------------*/
 389
 390 static struct device *
 391 add_numbered_child(unsigned chip, const char *name, int num,
 392                 void *pdata, unsigned pdata_len,
 393                 bool can_wakeup, int irq0, int irq1)
 394 {
 395         struct platform_device  *pdev;
 396         struct twl4030_client   *twl = &twl4030_modules[chip];
 397         int                     status;
 398
 399         pdev = platform_device_alloc(name, num);
 400         if (!pdev) {
 401                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 402                 status = -ENOMEM;
 403                 goto err;
 404         }
 405
 406         device_init_wakeup(&pdev->dev, can_wakeup);
 407         pdev->dev.parent = &twl->client->dev;
 408
 409         if (pdata) {
 410                 status = platform_device_add_data(pdev, pdata, pdata_len);
 411                 if (status < 0) {
 412                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 413                         goto err;
 414                 }
 415         }
 416
 417         if (irq0) {
 418                 struct resource r[2] = {
 419                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 420                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 421                 };
 422
 423                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 424                 if (status < 0) {
 425                         dev_dbg(&pdev->dev, "can't add irqs\n");
 426                         goto err;
 427                 }
 428         }
 429
 430         status = platform_device_add(pdev);
 431
 432 err:
 433         if (status < 0) {
 434                 platform_device_put(pdev);
 435                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 436                 return ERR_PTR(status);
 437         }
 438         return &pdev->dev;
 439 }
 440
 441 static inline struct device *add_child(unsigned chip, const char *name,
 442                 void *pdata, unsigned pdata_len,
 443                 bool can_wakeup, int irq0, int irq1)
 444 {
 445         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 446                 can_wakeup, irq0, irq1);
 447 }
 448
 449 static struct device *
 450 add_regulator_linked(int num, struct regulator_init_data *pdata,
 451                 struct regulator_consumer_supply *consumers,
 452                 unsigned num_consumers)
 453 {
 454         /* regulator framework demands init_data ... */
 455         if (!pdata)
 456                 return NULL;
 457
 458         if (consumers) {
 459                 pdata->consumer_supplies = consumers;
 460                 pdata->num_consumer_supplies = num_consumers;
 461         }
 462
 463         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 464         return add_numbered_child(3, "twl4030_reg", num,
 465                 pdata, sizeof(*pdata), false, 0, 0);
 466 }
 467
 468 static struct device *
 469 add_regulator(int num, struct regulator_init_data *pdata)
 470 {
 471         return add_regulator_linked(num, pdata, NULL, 0);
 472 }
 473
 474 /*
 475  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 476  * for the PIH, and the next are for the PWR_INT SIH, since
 477  * that's how twl_init_irq() sets things up.
 478  */
 479
 480 static int
 481 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 482 {
 483         struct device   *child;
 484
 485         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 486                 child = add_child(3, "twl4030_bci",
 487                                 pdata->bci, sizeof(*pdata->bci),
 488                                 false,
 489                                 /* irq0 = CHG_PRES, irq1 = BCI */
 490                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 491                 if (IS_ERR(child))
 492                         return PTR_ERR(child);
 493         }
 494
 495         if (twl_has_gpio() && pdata->gpio) {
 496                 child = add_child(1, "twl4030_gpio",
 497                                 pdata->gpio, sizeof(*pdata->gpio),
 498                                 false, pdata->irq_base + 0, 0);
 499                 if (IS_ERR(child))
 500                         return PTR_ERR(child);
 501         }
 502
 503         if (twl_has_keypad() && pdata->keypad) {
 504                 child = add_child(2, "twl4030_keypad",
 505                                 pdata->keypad, sizeof(*pdata->keypad),
 506                                 true, pdata->irq_base + 1, 0);
 507                 if (IS_ERR(child))
 508                         return PTR_ERR(child);
 509         }
 510
 511         if (twl_has_madc() && pdata->madc) {
 512                 child = add_child(2, "twl4030_madc",
 513                                 pdata->madc, sizeof(*pdata->madc),
 514                                 true, pdata->irq_base + 3, 0);
 515                 if (IS_ERR(child))
 516                         return PTR_ERR(child);
 517         }
 518
 519         if (twl_has_rtc()) {
 520                 /*
 521                  * REVISIT platform_data here currently might expose the
 522                  * "msecure" line ... but for now we just expect board
 523                  * setup to tell the chip "it's always ok to SET_TIME".
 524                  * Eventually, Linux might become more aware of such
 525                  * HW security concerns, and "least privilege".
 526                  */
 527                 child = add_child(3, "twl4030_rtc",
 528                                 NULL, 0,
 529                                 true, pdata->irq_base + 8 + 3, 0);
 530                 if (IS_ERR(child))
 531                         return PTR_ERR(child);
 532         }
 533
 534         if (twl_has_usb() && pdata->usb) {
 535
 536                 static struct regulator_consumer_supply usb1v5 = {
 537                         .supply =       "usb1v5",
 538                 };
 539                 static struct regulator_consumer_supply usb1v8 = {
 540                         .supply =       "usb1v8",
 541                 };
 542                 static struct regulator_consumer_supply usb3v1 = {
 543                         .supply =       "usb3v1",
 544                 };
 545
 546         /* First add the regulators so that they can be used by transceiver */
 547                 if (twl_has_regulator()) {
 548                         /* this is a template that gets copied */
 549                         struct regulator_init_data usb_fixed = {
 550                                 .constraints.valid_modes_mask =
 551                                         REGULATOR_MODE_NORMAL
 552                                         | REGULATOR_MODE_STANDBY,
 553                                 .constraints.valid_ops_mask =
 554                                         REGULATOR_CHANGE_MODE
 555                                         | REGULATOR_CHANGE_STATUS,
 556                         };
 557
 558                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 559                                                       &usb_fixed, &usb1v5, 1);
 560                         if (IS_ERR(child))
 561                                 return PTR_ERR(child);
 562
 563                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 564                                                       &usb_fixed, &usb1v8, 1);
 565                         if (IS_ERR(child))
 566                                 return PTR_ERR(child);
 567
 568                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 569                                                       &usb_fixed, &usb3v1, 1);
 570                         if (IS_ERR(child))
 571                                 return PTR_ERR(child);
 572
 573                 }
 574
 575                 child = add_child(0, "twl4030_usb",
 576                                 pdata->usb, sizeof(*pdata->usb),
 577                                 true,
 578                                 /* irq0 = USB_PRES, irq1 = USB */
 579                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 580
 581                 if (IS_ERR(child))
 582                         return PTR_ERR(child);
 583
 584                 /* we need to connect regulators to this transceiver */
 585                 if (twl_has_regulator() && child) {
 586                         usb1v5.dev = child;
 587                         usb1v8.dev = child;
 588                         usb3v1.dev = child;
 589                 }
 590         }
 591
 592         if (twl_has_watchdog()) {
 593                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 594                 if (IS_ERR(child))
 595                         return PTR_ERR(child);
 596         }
 597
 598         if (twl_has_pwrbutton()) {
 599                 child = add_child(1, "twl4030_pwrbutton",
 600                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 601                 if (IS_ERR(child))
 602                         return PTR_ERR(child);
 603         }
 604
 605         if (twl_has_regulator()) {
 606                 /*
 607                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 608                 if (IS_ERR(child))
 609                         return PTR_ERR(child);
 610                 */
 611
 612                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 613                 if (IS_ERR(child))
 614                         return PTR_ERR(child);
 615
 616                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 617                 if (IS_ERR(child))
 618                         return PTR_ERR(child);
 619
 620                 child = add_regulator((features & TWL4030_VAUX2)
 621                                         ? TWL4030_REG_VAUX2_4030
 622                                         : TWL4030_REG_VAUX2,
 623                                 pdata->vaux2);
 624                 if (IS_ERR(child))
 625                         return PTR_ERR(child);
 626         }
 627
 628         /* maybe add LDOs that are omitted on cost-reduced parts */
 629         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 630                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 631                 if (IS_ERR(child))
 632                         return PTR_ERR(child);
 633
 634                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 635                 if (IS_ERR(child))
 636                         return PTR_ERR(child);
 637
 638                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 639                 if (IS_ERR(child))
 640                         return PTR_ERR(child);
 641
 642                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 643                 if (IS_ERR(child))
 644                         return PTR_ERR(child);
 645
 646                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 647                 if (IS_ERR(child))
 648                         return PTR_ERR(child);
 649
 650                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 651                 if (IS_ERR(child))
 652                         return PTR_ERR(child);
 653
 654                 child = add_regulator(TWL4030_REG_VUSB1V5, pdata->vusb1v5);
 655                 if (IS_ERR(child))
 656                         return PTR_ERR(child);
 657
 658                 child = add_regulator(TWL4030_REG_VUSB1V8, pdata->vusb1v8);
 659                 if (IS_ERR(child))
 660                         return PTR_ERR(child);
 661
 662                 child = add_regulator(TWL4030_REG_VUSB3V1, pdata->vusb3v1);
 663                 if (IS_ERR(child))
 664                         return PTR_ERR(child);
 665         }
 666
 667         return 0;
 668 }
 669
 670 /*----------------------------------------------------------------------*/
 671
 672 /*
 673  * These three functions initialize the on-chip clock framework,
 674  * letting it generate the right frequencies for USB, MADC, and
 675  * other purposes.
 676  */
 677 static inline int __init protect_pm_master(void)
 678 {
 679         int e = 0;
 680
 681         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 682                         R_PROTECT_KEY);
 683         return e;
 684 }
 685
 686 static inline int __init unprotect_pm_master(void)
 687 {
 688         int e = 0;
 689
 690         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 691                         R_PROTECT_KEY);
 692         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 693                         R_PROTECT_KEY);
 694         return e;
 695 }
 696
 697 static void clocks_init(struct device *dev)
 698 {
 699         int e = 0;
 700         struct clk *osc;
 701         u32 rate;
 702         u8 ctrl = HFCLK_FREQ_26_MHZ;
 703
 704 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 705         if (cpu_is_omap2430())
 706                 osc = clk_get(dev, "osc_ck");
 707         else
 708                 osc = clk_get(dev, "osc_sys_ck");
 709
 710         if (IS_ERR(osc)) {
 711                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 712                                 "using bootloader value (unknown osc rate)\n");
 713                 return;
 714         }
 715
 716         rate = clk_get_rate(osc);
 717         clk_put(osc);
 718
 719 #else
 720         /* REVISIT for non-OMAP systems, pass the clock rate from
 721          * board init code, using platform_data.
 722          */
 723         osc = ERR_PTR(-EIO);
 724
 725         printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 726                "using bootloader value (unknown osc rate)\n");
 727
 728         return;
 729 #endif
 730
 731         switch (rate) {
 732         case 19200000:
 733                 ctrl = HFCLK_FREQ_19p2_MHZ;
 734                 break;
 735         case 26000000:
 736                 ctrl = HFCLK_FREQ_26_MHZ;
 737                 break;
 738         case 38400000:
 739                 ctrl = HFCLK_FREQ_38p4_MHZ;
 740                 break;
 741         }
 742
 743         ctrl |= HIGH_PERF_SQ;
 744         e |= unprotect_pm_master();
 745         /* effect->MADC+USB ck en */
 746         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 747         e |= protect_pm_master();
 748
 749         if (e < 0)
 750                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 751 }
 752
 753 /*----------------------------------------------------------------------*/
 754
 755 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 756 int twl_exit_irq(void);
 757
 758 static int twl4030_remove(struct i2c_client *client)
 759 {
 760         unsigned i;
 761         int status;
 762
 763         status = twl_exit_irq();
 764         if (status < 0)
 765                 return status;
 766
 767         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 768                 struct twl4030_client   *twl = &twl4030_modules[i];
 769
 770                 if (twl->client && twl->client != client)
 771                         i2c_unregister_device(twl->client);
 772                 twl4030_modules[i].client = NULL;
 773         }
 774         inuse = false;
 775         return 0;
 776 }
 777
 778 #define TWL4030_VAUX2_1P8V 0x5
 779 #define ENABLE_VAUX2_DEV_GRP 0x20
 780
 781 /* Enable USB GPIOs on new OMAP3EVM */
 782 static void usb_gpio_settings(void)
 783 {
 784         unsigned char val;
 785
 786         if (get_omap3_evm_rev() < OMAP3EVM_BOARD_GEN_2)
 787                 return;
 788
 789         /* Enable TWL GPIO Module */
 790         twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, 0x04, REG_GPIO_CTRL);
 791
 792         /* Configure GPIO-6 as output */
 793         twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &val, REG_GPIODATADIR1);
 794         val |= 0x4;
 795         twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, val, REG_GPIODATADIR1);
 796
 797         /* Set GPIO6 = 1 */
 798         twl4030_i2c_read_u8(TWL4030_MODULE_GPIO, &val, REG_GPIODATAOUT1);
 799         val |= 0x40;
 800         twl4030_i2c_write_u8(TWL4030_MODULE_GPIO, val, REG_GPIODATAOUT1);
 801 }
 802
 803 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 804 static int
 805 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 806 {
 807         int                             status;
 808         unsigned                        i;
 809         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 810
 811         if (!pdata) {
 812                 dev_dbg(&client->dev, "no platform data?\n");
 813                 return -EINVAL;
 814         }
 815
 816         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 817                 dev_dbg(&client->dev, "can't talk I2C?\n");
 818                 return -EIO;
 819         }
 820
 821         if (inuse) {
 822                 dev_dbg(&client->dev, "driver is already in use\n");
 823                 return -EBUSY;
 824         }
 825
 826         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 827                 struct twl4030_client   *twl = &twl4030_modules[i];
 828
 829                 twl->address = client->addr + i;
 830                 if (i == 0)
 831                         twl->client = client;
 832                 else {
 833                         twl->client = i2c_new_dummy(client->adapter,
 834                                         twl->address);
 835                         if (!twl->client) {
 836                                 dev_err(&twl->client->dev,
 837                                         "can't attach client %d\n", i);
 838                                 status = -ENOMEM;
 839                                 goto fail;
 840                         }
 841                         strlcpy(twl->client->name, id->name,
 842                                         sizeof(twl->client->name));
 843                 }
 844                 mutex_init(&twl->xfer_lock);
 845         }
 846         inuse = true;
 847
 848         /* setup clock framework */
 849         clocks_init(&client->dev);
 850
 851         /* load power event scripts */
 852         if (twl_has_power() && pdata->power)
 853                 twl4030_power_init(pdata->power);
 854
 855         /* Maybe init the T2 Interrupt subsystem */
 856         if (client->irq
 857                         && pdata->irq_base
 858                         && pdata->irq_end > pdata->irq_base) {
 859                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 860                 if (status < 0)
 861                         goto fail;
 862         }
 863
 864         status = add_children(pdata, id->driver_data);
 865
 866         usb_gpio_settings();
 867 fail:
 868         if (status < 0)
 869                 twl4030_remove(client);
 870         return status;
 871 }
 872
 873 static const struct i2c_device_id twl4030_ids[] = {
 874         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 875         { "twl5030", 0 },               /* T2 updated */
 876         { "tps65950", 0 },              /* catalog version of twl5030 */
 877         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 878         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 879         { /* end of list */ },
 880 };
 881 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 882
 883 /* One Client Driver , 4 Clients */
 884 static struct i2c_driver twl4030_driver = {
 885         .driver.name    = DRIVER_NAME,
 886         .id_table       = twl4030_ids,
 887         .probe          = twl4030_probe,
 888         .remove         = twl4030_remove,
 889 };
 890
 891 static int __init twl4030_init(void)
 892 {
 893         return i2c_add_driver(&twl4030_driver);
 894 }
 895 subsys_initcall(twl4030_init);
 896
 897 static void __exit twl4030_exit(void)
 898 {
 899         i2c_del_driver(&twl4030_driver);
 900 }
 901 module_exit(twl4030_exit);
 902
 903 MODULE_AUTHOR("Texas Instruments, Inc.");
 904 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 905 MODULE_LICENSE("GPL");