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
  41 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  42 #include <plat/cpu.h>
  43 #endif
  44
  45 /*
  46  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  47  * Management and System Companion Device" chips originally designed for
  48  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  49  * often at around 3 Mbit/sec, including for interrupt handling.
  50  *
  51  * This driver core provides genirq support for the interrupts emitted,
  52  * by the various modules, and exports register access primitives.
  53  *
  54  * FIXME this driver currently requires use of the first interrupt line
  55  * (and associated registers).
  56  */
  57
  58 #define DRIVER_NAME                     "twl4030"
  59
  60 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
  61         defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
  62 #define twl_has_bci()           true
  63 #else
  64 #define twl_has_bci()           false
  65 #endif
  66
  67 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  68 #define twl_has_keypad()        true
  69 #else
  70 #define twl_has_keypad()        false
  71 #endif
  72
  73 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  74 #define twl_has_gpio()  true
  75 #else
  76 #define twl_has_gpio()  false
  77 #endif
  78
  79 #if defined(CONFIG_REGULATOR_TWL4030) \
  80         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  81 #define twl_has_regulator()     true
  82 #else
  83 #define twl_has_regulator()     false
  84 #endif
  85
  86 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  87 #define twl_has_madc()  true
  88 #else
  89 #define twl_has_madc()  false
  90 #endif
  91
  92 #ifdef CONFIG_TWL4030_POWER
  93 #define twl_has_power()        true
  94 #else
  95 #define twl_has_power()        false
  96 #endif
  97
  98 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  99 #define twl_has_rtc()   true
 100 #else
 101 #define twl_has_rtc()   false
 102 #endif
 103
 104 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
 105 #define twl_has_usb()   true
 106 #else
 107 #define twl_has_usb()   false
 108 #endif
 109
 110 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 111         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 112 #define twl_has_watchdog()        true
 113 #else
 114 #define twl_has_watchdog()        false
 115 #endif
 116
 117 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE)
 118 #define twl_has_codec() true
 119 #else
 120 #define twl_has_codec() false
 121 #endif
 122
 123 /* Triton Core internal information (BEGIN) */
 124
 125 /* Last - for index max*/
 126 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 127
 128 #define TWL4030_NUM_SLAVES              4
 129
 130 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 131         || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
 132 #define twl_has_pwrbutton()     true
 133 #else
 134 #define twl_has_pwrbutton()     false
 135 #endif
 136
 137 /* Base Address defns for twl4030_map[] */
 138
 139 /* subchip/slave 0 - USB ID */
 140 #define TWL4030_BASEADD_USB             0x0000
 141
 142 /* subchip/slave 1 - AUD ID */
 143 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 144 #define TWL4030_BASEADD_GPIO            0x0098
 145 #define TWL4030_BASEADD_INTBR           0x0085
 146 #define TWL4030_BASEADD_PIH             0x0080
 147 #define TWL4030_BASEADD_TEST            0x004C
 148
 149 /* subchip/slave 2 - AUX ID */
 150 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 151 #define TWL4030_BASEADD_LED             0x00EE
 152 #define TWL4030_BASEADD_MADC            0x0000
 153 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 154 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 155 #define TWL4030_BASEADD_PWM0            0x00F8
 156 #define TWL4030_BASEADD_PWM1            0x00FB
 157 #define TWL4030_BASEADD_PWMA            0x00EF
 158 #define TWL4030_BASEADD_PWMB            0x00F1
 159 #define TWL4030_BASEADD_KEYPAD          0x00D2
 160
 161 /* subchip/slave 3 - POWER ID */
 162 #define TWL4030_BASEADD_BACKUP          0x0014
 163 #define TWL4030_BASEADD_INT             0x002E
 164 #define TWL4030_BASEADD_PM_MASTER       0x0036
 165 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 166 #define TWL4030_BASEADD_RTC             0x001C
 167 #define TWL4030_BASEADD_SECURED_REG     0x0000
 168
 169 /* Triton Core internal information (END) */
 170
 171
 172 /* Few power values */
 173 #define R_CFG_BOOT                      0x05
 174 #define R_PROTECT_KEY                   0x0E
 175
 176 /* access control values for R_PROTECT_KEY */
 177 #define KEY_UNLOCK1                     0xce
 178 #define KEY_UNLOCK2                     0xec
 179 #define KEY_LOCK                        0x00
 180
 181 /* some fields in R_CFG_BOOT */
 182 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 183 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 184 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 185 #define HIGH_PERF_SQ                    (1 << 3)
 186
 187
 188 /* chip-specific feature flags, for i2c_device_id.driver_data */
 189 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 190 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 191
 192 /*----------------------------------------------------------------------*/
 193
 194 /* is driver active, bound to a chip? */
 195 static bool inuse;
 196
 197 /* Structure for each TWL4030 Slave */
 198 struct twl4030_client {
 199         struct i2c_client *client;
 200         u8 address;
 201
 202         /* max numb of i2c_msg required is for read =2 */
 203         struct i2c_msg xfer_msg[2];
 204
 205         /* To lock access to xfer_msg */
 206         struct mutex xfer_lock;
 207 };
 208
 209 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 210
 211
 212 /* mapping the module id to slave id and base address */
 213 struct twl4030mapping {
 214         unsigned char sid;      /* Slave ID */
 215         unsigned char base;     /* base address */
 216 };
 217
 218 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 219         /*
 220          * NOTE:  don't change this table without updating the
 221          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 222          * so they continue to match the order in this table.
 223          */
 224
 225         { 0, TWL4030_BASEADD_USB },
 226
 227         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 228         { 1, TWL4030_BASEADD_GPIO },
 229         { 1, TWL4030_BASEADD_INTBR },
 230         { 1, TWL4030_BASEADD_PIH },
 231         { 1, TWL4030_BASEADD_TEST },
 232
 233         { 2, TWL4030_BASEADD_KEYPAD },
 234         { 2, TWL4030_BASEADD_MADC },
 235         { 2, TWL4030_BASEADD_INTERRUPTS },
 236         { 2, TWL4030_BASEADD_LED },
 237         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 238         { 2, TWL4030_BASEADD_PRECHARGE },
 239         { 2, TWL4030_BASEADD_PWM0 },
 240         { 2, TWL4030_BASEADD_PWM1 },
 241         { 2, TWL4030_BASEADD_PWMA },
 242         { 2, TWL4030_BASEADD_PWMB },
 243
 244         { 3, TWL4030_BASEADD_BACKUP },
 245         { 3, TWL4030_BASEADD_INT },
 246         { 3, TWL4030_BASEADD_PM_MASTER },
 247         { 3, TWL4030_BASEADD_PM_RECEIVER },
 248         { 3, TWL4030_BASEADD_RTC },
 249         { 3, TWL4030_BASEADD_SECURED_REG },
 250 };
 251
 252 /*----------------------------------------------------------------------*/
 253
 254 /* Exported Functions */
 255
 256 /**
 257  * twl4030_i2c_write - Writes a n bit register in TWL4030
 258  * @mod_no: module number
 259  * @value: an array of num_bytes+1 containing data to write
 260  * @reg: register address (just offset will do)
 261  * @num_bytes: number of bytes to transfer
 262  *
 263  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 264  * valid data starts at Offset 1.
 265  *
 266  * Returns the result of operation - 0 is success
 267  */
 268 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 269 {
 270         int ret;
 271         int sid;
 272         struct twl4030_client *twl;
 273         struct i2c_msg *msg;
 274
 275         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 276                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 277                 return -EPERM;
 278         }
 279         sid = twl4030_map[mod_no].sid;
 280         twl = &twl4030_modules[sid];
 281
 282         if (unlikely(!inuse)) {
 283                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 284                 return -EPERM;
 285         }
 286         mutex_lock(&twl->xfer_lock);
 287         /*
 288          * [MSG1]: fill the register address data
 289          * fill the data Tx buffer
 290          */
 291         msg = &twl->xfer_msg[0];
 292         msg->addr = twl->address;
 293         msg->len = num_bytes + 1;
 294         msg->flags = 0;
 295         msg->buf = value;
 296         /* over write the first byte of buffer with the register address */
 297         *value = twl4030_map[mod_no].base + reg;
 298         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 299         mutex_unlock(&twl->xfer_lock);
 300
 301         /* i2cTransfer returns num messages.translate it pls.. */
 302         if (ret >= 0)
 303                 ret = 0;
 304         return ret;
 305 }
 306 EXPORT_SYMBOL(twl4030_i2c_write);
 307
 308 /**
 309  * twl4030_i2c_read - Reads a n bit register in TWL4030
 310  * @mod_no: module number
 311  * @value: an array of num_bytes containing data to be read
 312  * @reg: register address (just offset will do)
 313  * @num_bytes: number of bytes to transfer
 314  *
 315  * Returns result of operation - num_bytes is success else failure.
 316  */
 317 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 318 {
 319         int ret;
 320         u8 val;
 321         int sid;
 322         struct twl4030_client *twl;
 323         struct i2c_msg *msg;
 324
 325         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 326                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 327                 return -EPERM;
 328         }
 329         sid = twl4030_map[mod_no].sid;
 330         twl = &twl4030_modules[sid];
 331
 332         if (unlikely(!inuse)) {
 333                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 334                 return -EPERM;
 335         }
 336         mutex_lock(&twl->xfer_lock);
 337         /* [MSG1] fill the register address data */
 338         msg = &twl->xfer_msg[0];
 339         msg->addr = twl->address;
 340         msg->len = 1;
 341         msg->flags = 0; /* Read the register value */
 342         val = twl4030_map[mod_no].base + reg;
 343         msg->buf = &val;
 344         /* [MSG2] fill the data rx buffer */
 345         msg = &twl->xfer_msg[1];
 346         msg->addr = twl->address;
 347         msg->flags = I2C_M_RD;  /* Read the register value */
 348         msg->len = num_bytes;   /* only n bytes */
 349         msg->buf = value;
 350         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 351         mutex_unlock(&twl->xfer_lock);
 352
 353         /* i2cTransfer returns num messages.translate it pls.. */
 354         if (ret >= 0)
 355                 ret = 0;
 356         return ret;
 357 }
 358 EXPORT_SYMBOL(twl4030_i2c_read);
 359
 360 /**
 361  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 362  * @mod_no: module number
 363  * @value: the value to be written 8 bit
 364  * @reg: register address (just offset will do)
 365  *
 366  * Returns result of operation - 0 is success
 367  */
 368 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 369 {
 370
 371         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 372         u8 temp_buffer[2] = { 0 };
 373         /* offset 1 contains the data */
 374         temp_buffer[1] = value;
 375         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 376 }
 377 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 378
 379 /**
 380  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 381  * @mod_no: module number
 382  * @value: the value read 8 bit
 383  * @reg: register address (just offset will do)
 384  *
 385  * Returns result of operation - 0 is success
 386  */
 387 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 388 {
 389         return twl4030_i2c_read(mod_no, value, reg, 1);
 390 }
 391 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 392
 393 /*----------------------------------------------------------------------*/
 394
 395 static struct device *
 396 add_numbered_child(unsigned chip, const char *name, int num,
 397                 void *pdata, unsigned pdata_len,
 398                 bool can_wakeup, int irq0, int irq1)
 399 {
 400         struct platform_device  *pdev;
 401         struct twl4030_client   *twl = &twl4030_modules[chip];
 402         int                     status;
 403
 404         pdev = platform_device_alloc(name, num);
 405         if (!pdev) {
 406                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 407                 status = -ENOMEM;
 408                 goto err;
 409         }
 410
 411         device_init_wakeup(&pdev->dev, can_wakeup);
 412         pdev->dev.parent = &twl->client->dev;
 413
 414         if (pdata) {
 415                 status = platform_device_add_data(pdev, pdata, pdata_len);
 416                 if (status < 0) {
 417                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 418                         goto err;
 419                 }
 420         }
 421
 422         if (irq0) {
 423                 struct resource r[2] = {
 424                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 425                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 426                 };
 427
 428                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 429                 if (status < 0) {
 430                         dev_dbg(&pdev->dev, "can't add irqs\n");
 431                         goto err;
 432                 }
 433         }
 434
 435         status = platform_device_add(pdev);
 436
 437 err:
 438         if (status < 0) {
 439                 platform_device_put(pdev);
 440                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 441                 return ERR_PTR(status);
 442         }
 443         return &pdev->dev;
 444 }
 445
 446 static inline struct device *add_child(unsigned chip, const char *name,
 447                 void *pdata, unsigned pdata_len,
 448                 bool can_wakeup, int irq0, int irq1)
 449 {
 450         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 451                 can_wakeup, irq0, irq1);
 452 }
 453
 454 static struct device *
 455 add_regulator_linked(int num, struct regulator_init_data *pdata,
 456                 struct regulator_consumer_supply *consumers,
 457                 unsigned num_consumers)
 458 {
 459         /* regulator framework demands init_data ... */
 460         if (!pdata)
 461                 return NULL;
 462
 463         if (consumers) {
 464                 pdata->consumer_supplies = consumers;
 465                 pdata->num_consumer_supplies = num_consumers;
 466         }
 467
 468         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 469         return add_numbered_child(3, "twl4030_reg", num,
 470                 pdata, sizeof(*pdata), false, 0, 0);
 471 }
 472
 473 static struct device *
 474 add_regulator(int num, struct regulator_init_data *pdata)
 475 {
 476         return add_regulator_linked(num, pdata, NULL, 0);
 477 }
 478
 479 /*
 480  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 481  * for the PIH, and the next are for the PWR_INT SIH, since
 482  * that's how twl_init_irq() sets things up.
 483  */
 484
 485 static int
 486 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 487 {
 488         struct device   *child;
 489
 490         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 491                 child = add_child(3, "twl4030_bci",
 492                                 pdata->bci, sizeof(*pdata->bci),
 493                                 false,
 494                                 /* irq0 = CHG_PRES, irq1 = BCI */
 495                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 496                 if (IS_ERR(child))
 497                         return PTR_ERR(child);
 498         }
 499
 500         if (twl_has_gpio() && pdata->gpio) {
 501                 child = add_child(1, "twl4030_gpio",
 502                                 pdata->gpio, sizeof(*pdata->gpio),
 503                                 false, pdata->irq_base + 0, 0);
 504                 if (IS_ERR(child))
 505                         return PTR_ERR(child);
 506         }
 507
 508         if (twl_has_keypad() && pdata->keypad) {
 509                 child = add_child(2, "twl4030_keypad",
 510                                 pdata->keypad, sizeof(*pdata->keypad),
 511                                 true, pdata->irq_base + 1, 0);
 512                 if (IS_ERR(child))
 513                         return PTR_ERR(child);
 514         }
 515
 516         if (twl_has_madc() && pdata->madc) {
 517                 child = add_child(2, "twl4030_madc",
 518                                 pdata->madc, sizeof(*pdata->madc),
 519                                 true, pdata->irq_base + 3, 0);
 520                 if (IS_ERR(child))
 521                         return PTR_ERR(child);
 522         }
 523
 524         if (twl_has_rtc()) {
 525                 /*
 526                  * REVISIT platform_data here currently might expose the
 527                  * "msecure" line ... but for now we just expect board
 528                  * setup to tell the chip "it's always ok to SET_TIME".
 529                  * Eventually, Linux might become more aware of such
 530                  * HW security concerns, and "least privilege".
 531                  */
 532                 child = add_child(3, "twl4030_rtc",
 533                                 NULL, 0,
 534                                 true, pdata->irq_base + 8 + 3, 0);
 535                 if (IS_ERR(child))
 536                         return PTR_ERR(child);
 537         }
 538
 539         if (twl_has_usb() && pdata->usb) {
 540
 541                 static struct regulator_consumer_supply usb1v5 = {
 542                         .supply =       "usb1v5",
 543                 };
 544                 static struct regulator_consumer_supply usb1v8 = {
 545                         .supply =       "usb1v8",
 546                 };
 547                 static struct regulator_consumer_supply usb3v1 = {
 548                         .supply =       "usb3v1",
 549                 };
 550
 551         /* First add the regulators so that they can be used by transceiver */
 552                 if (twl_has_regulator()) {
 553                         /* this is a template that gets copied */
 554                         struct regulator_init_data usb_fixed = {
 555                                 .constraints.valid_modes_mask =
 556                                         REGULATOR_MODE_NORMAL
 557                                         | REGULATOR_MODE_STANDBY,
 558                                 .constraints.valid_ops_mask =
 559                                         REGULATOR_CHANGE_MODE
 560                                         | REGULATOR_CHANGE_STATUS,
 561                         };
 562
 563                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 564                                                       &usb_fixed, &usb1v5, 1);
 565                         if (IS_ERR(child))
 566                                 return PTR_ERR(child);
 567
 568                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 569                                                       &usb_fixed, &usb1v8, 1);
 570                         if (IS_ERR(child))
 571                                 return PTR_ERR(child);
 572
 573                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 574                                                       &usb_fixed, &usb3v1, 1);
 575                         if (IS_ERR(child))
 576                                 return PTR_ERR(child);
 577
 578                 }
 579
 580                 child = add_child(0, "twl4030_usb",
 581                                 pdata->usb, sizeof(*pdata->usb),
 582                                 true,
 583                                 /* irq0 = USB_PRES, irq1 = USB */
 584                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 585
 586                 if (IS_ERR(child))
 587                         return PTR_ERR(child);
 588
 589                 /* we need to connect regulators to this transceiver */
 590                 if (twl_has_regulator() && child) {
 591                         usb1v5.dev = child;
 592                         usb1v8.dev = child;
 593                         usb3v1.dev = child;
 594                 }
 595         }
 596
 597         if (twl_has_watchdog()) {
 598                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 599                 if (IS_ERR(child))
 600                         return PTR_ERR(child);
 601         }
 602
 603         if (twl_has_pwrbutton()) {
 604                 child = add_child(1, "twl4030_pwrbutton",
 605                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 606                 if (IS_ERR(child))
 607                         return PTR_ERR(child);
 608         }
 609
 610         if (twl_has_codec() && pdata->codec) {
 611                 child = add_child(1, "twl4030_codec",
 612                                 pdata->codec, sizeof(*pdata->codec),
 613                                 false, 0, 0);
 614                 if (IS_ERR(child))
 615                         return PTR_ERR(child);
 616         }
 617
 618         if (twl_has_regulator()) {
 619                 /*
 620                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 621                 if (IS_ERR(child))
 622                         return PTR_ERR(child);
 623                 */
 624
 625                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 626                 if (IS_ERR(child))
 627                         return PTR_ERR(child);
 628
 629                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 630                 if (IS_ERR(child))
 631                         return PTR_ERR(child);
 632
 633                 child = add_regulator((features & TWL4030_VAUX2)
 634                                         ? TWL4030_REG_VAUX2_4030
 635                                         : TWL4030_REG_VAUX2,
 636                                 pdata->vaux2);
 637                 if (IS_ERR(child))
 638                         return PTR_ERR(child);
 639         }
 640
 641         /* maybe add LDOs that are omitted on cost-reduced parts */
 642         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 643                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 644                 if (IS_ERR(child))
 645                         return PTR_ERR(child);
 646
 647                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 648                 if (IS_ERR(child))
 649                         return PTR_ERR(child);
 650
 651                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 652                 if (IS_ERR(child))
 653                         return PTR_ERR(child);
 654
 655                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 656                 if (IS_ERR(child))
 657                         return PTR_ERR(child);
 658
 659                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 660                 if (IS_ERR(child))
 661                         return PTR_ERR(child);
 662
 663                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 664                 if (IS_ERR(child))
 665                         return PTR_ERR(child);
 666         }
 667
 668         return 0;
 669 }
 670
 671 /*----------------------------------------------------------------------*/
 672
 673 /*
 674  * These three functions initialize the on-chip clock framework,
 675  * letting it generate the right frequencies for USB, MADC, and
 676  * other purposes.
 677  */
 678 static inline int __init protect_pm_master(void)
 679 {
 680         int e = 0;
 681
 682         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 683                         R_PROTECT_KEY);
 684         return e;
 685 }
 686
 687 static inline int __init unprotect_pm_master(void)
 688 {
 689         int e = 0;
 690
 691         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 692                         R_PROTECT_KEY);
 693         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 694                         R_PROTECT_KEY);
 695         return e;
 696 }
 697
 698 static void clocks_init(struct device *dev)
 699 {
 700         int e = 0;
 701         struct clk *osc;
 702         u32 rate;
 703         u8 ctrl = HFCLK_FREQ_26_MHZ;
 704
 705 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 706         if (cpu_is_omap2430())
 707                 osc = clk_get(dev, "osc_ck");
 708         else
 709                 osc = clk_get(dev, "osc_sys_ck");
 710
 711         if (IS_ERR(osc)) {
 712                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 713                                 "using bootloader value (unknown osc rate)\n");
 714                 return;
 715         }
 716
 717         rate = clk_get_rate(osc);
 718         clk_put(osc);
 719
 720 #else
 721         /* REVISIT for non-OMAP systems, pass the clock rate from
 722          * board init code, using platform_data.
 723          */
 724         osc = ERR_PTR(-EIO);
 725
 726         printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 727                "using bootloader value (unknown osc rate)\n");
 728
 729         return;
 730 #endif
 731
 732         switch (rate) {
 733         case 19200000:
 734                 ctrl = HFCLK_FREQ_19p2_MHZ;
 735                 break;
 736         case 26000000:
 737                 ctrl = HFCLK_FREQ_26_MHZ;
 738                 break;
 739         case 38400000:
 740                 ctrl = HFCLK_FREQ_38p4_MHZ;
 741                 break;
 742         }
 743
 744         ctrl |= HIGH_PERF_SQ;
 745         e |= unprotect_pm_master();
 746         /* effect->MADC+USB ck en */
 747         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 748         e |= protect_pm_master();
 749
 750         if (e < 0)
 751                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 752 }
 753
 754 /*----------------------------------------------------------------------*/
 755
 756 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 757 int twl_exit_irq(void);
 758
 759 static int twl4030_remove(struct i2c_client *client)
 760 {
 761         unsigned i;
 762         int status;
 763
 764         status = twl_exit_irq();
 765         if (status < 0)
 766                 return status;
 767
 768         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 769                 struct twl4030_client   *twl = &twl4030_modules[i];
 770
 771                 if (twl->client && twl->client != client)
 772                         i2c_unregister_device(twl->client);
 773                 twl4030_modules[i].client = NULL;
 774         }
 775         inuse = false;
 776         return 0;
 777 }
 778
 779 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 780 static int __init
 781 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 782 {
 783         int                             status;
 784         unsigned                        i;
 785         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 786
 787         if (!pdata) {
 788                 dev_dbg(&client->dev, "no platform data?\n");
 789                 return -EINVAL;
 790         }
 791
 792         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 793                 dev_dbg(&client->dev, "can't talk I2C?\n");
 794                 return -EIO;
 795         }
 796
 797         if (inuse) {
 798                 dev_dbg(&client->dev, "driver is already in use\n");
 799                 return -EBUSY;
 800         }
 801
 802         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 803                 struct twl4030_client   *twl = &twl4030_modules[i];
 804
 805                 twl->address = client->addr + i;
 806                 if (i == 0)
 807                         twl->client = client;
 808                 else {
 809                         twl->client = i2c_new_dummy(client->adapter,
 810                                         twl->address);
 811                         if (!twl->client) {
 812                                 dev_err(&client->dev,
 813                                         "can't attach client %d\n", i);
 814                                 status = -ENOMEM;
 815                                 goto fail;
 816                         }
 817                         strlcpy(twl->client->name, id->name,
 818                                         sizeof(twl->client->name));
 819                 }
 820                 mutex_init(&twl->xfer_lock);
 821         }
 822         inuse = true;
 823
 824         /* setup clock framework */
 825         clocks_init(&client->dev);
 826
 827         /* load power event scripts */
 828         if (twl_has_power() && pdata->power)
 829                 twl4030_power_init(pdata->power);
 830
 831         /* Maybe init the T2 Interrupt subsystem */
 832         if (client->irq
 833                         && pdata->irq_base
 834                         && pdata->irq_end > pdata->irq_base) {
 835                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 836                 if (status < 0)
 837                         goto fail;
 838         }
 839
 840         status = add_children(pdata, id->driver_data);
 841 fail:
 842         if (status < 0)
 843                 twl4030_remove(client);
 844         return status;
 845 }
 846
 847 static const struct i2c_device_id twl4030_ids[] = {
 848         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 849         { "twl5030", 0 },               /* T2 updated */
 850         { "tps65950", 0 },              /* catalog version of twl5030 */
 851         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 852         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 853         { /* end of list */ },
 854 };
 855 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 856
 857 /* One Client Driver , 4 Clients */
 858 static struct i2c_driver twl4030_driver = {
 859         .driver.name    = DRIVER_NAME,
 860         .id_table       = twl4030_ids,
 861         .probe          = twl4030_probe,
 862         .remove         = twl4030_remove,
 863 };
 864
 865 static int __init twl4030_init(void)
 866 {
 867         return i2c_add_driver(&twl4030_driver);
 868 }
 869 subsys_initcall(twl4030_init);
 870
 871 static void __exit twl4030_exit(void)
 872 {
 873         i2c_del_driver(&twl4030_driver);
 874 }
 875 module_exit(twl4030_exit);
 876
 877 MODULE_AUTHOR("Texas Instruments, Inc.");
 878 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 879 MODULE_LICENSE("GPL");