drivers/mfd/twl-core.c

   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");