drivers/mfd/twl4030-power.c

   1 /*
   2  * linux/drivers/i2c/chips/twl4030-power.c
   3  *
   4  * Handle TWL4030 Power initialization
   5  *
   6  * Copyright (C) 2008 Nokia Corporation
   7  * Copyright (C) 2006 Texas Instruments, Inc
   8  *
   9  * Written by   Kalle Jokiniemi
  10  *              Peter De Schrijver <peter.de-schrijver@nokia.com>
  11  * Several fixes by Amit Kucheria <amit.kucheria@verdurent.com>
  12  *
  13  * This file is subject to the terms and conditions of the GNU General
  14  * Public License. See the file "COPYING" in the main directory of this
  15  * archive for more details.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #include <linux/module.h>
  28 #include <linux/pm.h>
  29 #include <linux/i2c/twl.h>
  30 #include <linux/platform_device.h>
  31
  32 #include <asm/mach-types.h>
  33
  34 static u8 twl4030_start_script_address = 0x2b;
  35
  36 #define PWR_P1_SW_EVENTS        0x10
  37 #define PWR_DEVOFF              (1 << 0)
  38 #define SEQ_OFFSYNC             (1 << 0)
  39
  40 #define PHY_TO_OFF_PM_MASTER(p)         (p - 0x36)
  41 #define PHY_TO_OFF_PM_RECEIVER(p)       (p - 0x5b)
  42
  43 /* resource - hfclk */
  44 #define R_HFCLKOUT_DEV_GRP      PHY_TO_OFF_PM_RECEIVER(0xe6)
  45
  46 /* PM events */
  47 #define R_P1_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x46)
  48 #define R_P2_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x47)
  49 #define R_P3_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x48)
  50 #define R_CFG_P1_TRANSITION     PHY_TO_OFF_PM_MASTER(0x36)
  51 #define R_CFG_P2_TRANSITION     PHY_TO_OFF_PM_MASTER(0x37)
  52 #define R_CFG_P3_TRANSITION     PHY_TO_OFF_PM_MASTER(0x38)
  53
  54 #define LVL_WAKEUP      0x08
  55
  56 #define ENABLE_WARMRESET (1<<4)
  57
  58 #define END_OF_SCRIPT           0x3f
  59
  60 #define R_SEQ_ADD_A2S           PHY_TO_OFF_PM_MASTER(0x55)
  61 #define R_SEQ_ADD_S2A12         PHY_TO_OFF_PM_MASTER(0x56)
  62 #define R_SEQ_ADD_S2A3          PHY_TO_OFF_PM_MASTER(0x57)
  63 #define R_SEQ_ADD_WARM          PHY_TO_OFF_PM_MASTER(0x58)
  64 #define R_MEMORY_ADDRESS        PHY_TO_OFF_PM_MASTER(0x59)
  65 #define R_MEMORY_DATA           PHY_TO_OFF_PM_MASTER(0x5a)
  66
  67 /* resource configuration registers
  68    <RESOURCE>_DEV_GRP   at address 'n+0'
  69    <RESOURCE>_TYPE      at address 'n+1'
  70    <RESOURCE>_REMAP     at address 'n+2'
  71    <RESOURCE>_DEDICATED at address 'n+3'
  72 */
  73 #define DEV_GRP_OFFSET          0
  74 #define TYPE_OFFSET             1
  75 #define REMAP_OFFSET            2
  76 #define DEDICATED_OFFSET        3
  77
  78 /* Bit positions in the registers */
  79
  80 /* <RESOURCE>_DEV_GRP */
  81 #define DEV_GRP_SHIFT           5
  82 #define DEV_GRP_MASK            (7 << DEV_GRP_SHIFT)
  83
  84 /* <RESOURCE>_TYPE */
  85 #define TYPE_SHIFT              0
  86 #define TYPE_MASK               (7 << TYPE_SHIFT)
  87 #define TYPE2_SHIFT             3
  88 #define TYPE2_MASK              (3 << TYPE2_SHIFT)
  89
  90 /* <RESOURCE>_REMAP */
  91 #define SLEEP_STATE_SHIFT       0
  92 #define SLEEP_STATE_MASK        (0xf << SLEEP_STATE_SHIFT)
  93 #define OFF_STATE_SHIFT         4
  94 #define OFF_STATE_MASK          (0xf << OFF_STATE_SHIFT)
  95
  96 static u8 res_config_addrs[] = {
  97         [RES_VAUX1]     = 0x17,
  98         [RES_VAUX2]     = 0x1b,
  99         [RES_VAUX3]     = 0x1f,
 100         [RES_VAUX4]     = 0x23,
 101         [RES_VMMC1]     = 0x27,
 102         [RES_VMMC2]     = 0x2b,
 103         [RES_VPLL1]     = 0x2f,
 104         [RES_VPLL2]     = 0x33,
 105         [RES_VSIM]      = 0x37,
 106         [RES_VDAC]      = 0x3b,
 107         [RES_VINTANA1]  = 0x3f,
 108         [RES_VINTANA2]  = 0x43,
 109         [RES_VINTDIG]   = 0x47,
 110         [RES_VIO]       = 0x4b,
 111         [RES_VDD1]      = 0x55,
 112         [RES_VDD2]      = 0x63,
 113         [RES_VUSB_1V5]  = 0x71,
 114         [RES_VUSB_1V8]  = 0x74,
 115         [RES_VUSB_3V1]  = 0x77,
 116         [RES_VUSBCP]    = 0x7a,
 117         [RES_REGEN]     = 0x7f,
 118         [RES_NRES_PWRON] = 0x82,
 119         [RES_CLKEN]     = 0x85,
 120         [RES_SYSEN]     = 0x88,
 121         [RES_HFCLKOUT]  = 0x8b,
 122         [RES_32KCLKOUT] = 0x8e,
 123         [RES_RESET]     = 0x91,
 124         [RES_MAIN_REF]  = 0x94,
 125 };
 126
 127 static int twl4030_write_script_byte(u8 address, u8 byte)
 128 {
 129         int err;
 130
 131         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_MEMORY_ADDRESS);
 132         if (err)
 133                 goto out;
 134         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, byte, R_MEMORY_DATA);
 135 out:
 136         return err;
 137 }
 138
 139 static int twl4030_write_script_ins(u8 address, u16 pmb_message,
 140                                            u8 delay, u8 next)
 141 {
 142         int err;
 143
 144         address *= 4;
 145         err = twl4030_write_script_byte(address++, pmb_message >> 8);
 146         if (err)
 147                 goto out;
 148         err = twl4030_write_script_byte(address++, pmb_message & 0xff);
 149         if (err)
 150                 goto out;
 151         err = twl4030_write_script_byte(address++, delay);
 152         if (err)
 153                 goto out;
 154         err = twl4030_write_script_byte(address++, next);
 155 out:
 156         return err;
 157 }
 158
 159 static int twl4030_write_script(u8 address, struct twl4030_ins *script,
 160                                        int len)
 161 {
 162         int err = -EINVAL;
 163
 164         for (; len; len--, address++, script++) {
 165                 if (len == 1) {
 166                         err = twl4030_write_script_ins(address,
 167                                                 script->pmb_message,
 168                                                 script->delay,
 169                                                 END_OF_SCRIPT);
 170                         if (err)
 171                                 break;
 172                 } else {
 173                         err = twl4030_write_script_ins(address,
 174                                                 script->pmb_message,
 175                                                 script->delay,
 176                                                 address + 1);
 177                         if (err)
 178                                 break;
 179                 }
 180         }
 181         return err;
 182 }
 183
 184 static int twl4030_config_wakeup3_sequence(u8 address)
 185 {
 186         int err;
 187         u8 data;
 188
 189         /* Set SLEEP to ACTIVE SEQ address for P3 */
 190         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A3);
 191         if (err)
 192                 goto out;
 193
 194         /* P3 LVL_WAKEUP should be on LEVEL */
 195         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P3_SW_EVENTS);
 196         if (err)
 197                 goto out;
 198         data |= LVL_WAKEUP;
 199         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P3_SW_EVENTS);
 200 out:
 201         if (err)
 202                 pr_err("TWL4030 wakeup sequence for P3 config error\n");
 203         return err;
 204 }
 205
 206 static int twl4030_config_wakeup12_sequence(u8 address)
 207 {
 208         int err = 0;
 209         u8 data;
 210
 211         /* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
 212         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_S2A12);
 213         if (err)
 214                 goto out;
 215
 216         /* P1/P2 LVL_WAKEUP should be on LEVEL */
 217         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P1_SW_EVENTS);
 218         if (err)
 219                 goto out;
 220
 221         data |= LVL_WAKEUP;
 222         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P1_SW_EVENTS);
 223         if (err)
 224                 goto out;
 225
 226         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data, R_P2_SW_EVENTS);
 227         if (err)
 228                 goto out;
 229
 230         data |= LVL_WAKEUP;
 231         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data, R_P2_SW_EVENTS);
 232         if (err)
 233                 goto out;
 234
 235         if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
 236                 /* Disabling AC charger effect on sleep-active transitions */
 237                 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &data,
 238                                       R_CFG_P1_TRANSITION);
 239                 if (err)
 240                         goto out;
 241                 data &= ~(1<<1);
 242                 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, data,
 243                                        R_CFG_P1_TRANSITION);
 244                 if (err)
 245                         goto out;
 246         }
 247
 248 out:
 249         if (err)
 250                 pr_err("TWL4030 wakeup sequence for P1 and P2" \
 251                         "config error\n");
 252         return err;
 253 }
 254
 255 static int twl4030_config_sleep_sequence(u8 address)
 256 {
 257         int err;
 258
 259         /* Set ACTIVE to SLEEP SEQ address in T2 memory*/
 260         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_A2S);
 261
 262         if (err)
 263                 pr_err("TWL4030 sleep sequence config error\n");
 264
 265         return err;
 266 }
 267
 268 static int twl4030_config_warmreset_sequence(u8 address)
 269 {
 270         int err;
 271         u8 rd_data;
 272
 273         /* Set WARM RESET SEQ address for P1 */
 274         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, address, R_SEQ_ADD_WARM);
 275         if (err)
 276                 goto out;
 277
 278         /* P1/P2/P3 enable WARMRESET */
 279         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P1_SW_EVENTS);
 280         if (err)
 281                 goto out;
 282
 283         rd_data |= ENABLE_WARMRESET;
 284         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P1_SW_EVENTS);
 285         if (err)
 286                 goto out;
 287
 288         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P2_SW_EVENTS);
 289         if (err)
 290                 goto out;
 291
 292         rd_data |= ENABLE_WARMRESET;
 293         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P2_SW_EVENTS);
 294         if (err)
 295                 goto out;
 296
 297         err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &rd_data, R_P3_SW_EVENTS);
 298         if (err)
 299                 goto out;
 300
 301         rd_data |= ENABLE_WARMRESET;
 302         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, rd_data, R_P3_SW_EVENTS);
 303 out:
 304         if (err)
 305                 pr_err("TWL4030 warmreset seq config error\n");
 306         return err;
 307 }
 308
 309 static int twl4030_configure_resource(struct twl4030_resconfig *rconfig)
 310 {
 311         int rconfig_addr;
 312         int err;
 313         u8 type;
 314         u8 grp;
 315         u8 remap;
 316
 317         if (rconfig->resource > TOTAL_RESOURCES) {
 318                 pr_err("TWL4030 Resource %d does not exist\n",
 319                         rconfig->resource);
 320                 return -EINVAL;
 321         }
 322
 323         rconfig_addr = res_config_addrs[rconfig->resource];
 324
 325         /* Set resource group */
 326         err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &grp,
 327                               rconfig_addr + DEV_GRP_OFFSET);
 328         if (err) {
 329                 pr_err("TWL4030 Resource %d group could not be read\n",
 330                         rconfig->resource);
 331                 return err;
 332         }
 333
 334         if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
 335                 grp &= ~DEV_GRP_MASK;
 336                 grp |= rconfig->devgroup << DEV_GRP_SHIFT;
 337                 err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
 338                                        grp, rconfig_addr + DEV_GRP_OFFSET);
 339                 if (err < 0) {
 340                         pr_err("TWL4030 failed to program devgroup\n");
 341                         return err;
 342                 }
 343         }
 344
 345         /* Set resource types */
 346         err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &type,
 347                                 rconfig_addr + TYPE_OFFSET);
 348         if (err < 0) {
 349                 pr_err("TWL4030 Resource %d type could not be read\n",
 350                         rconfig->resource);
 351                 return err;
 352         }
 353
 354         if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
 355                 type &= ~TYPE_MASK;
 356                 type |= rconfig->type << TYPE_SHIFT;
 357         }
 358
 359         if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
 360                 type &= ~TYPE2_MASK;
 361                 type |= rconfig->type2 << TYPE2_SHIFT;
 362         }
 363
 364         err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
 365                                 type, rconfig_addr + TYPE_OFFSET);
 366         if (err < 0) {
 367                 pr_err("TWL4030 failed to program resource type\n");
 368                 return err;
 369         }
 370
 371         /* Set remap states */
 372         err = twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &remap,
 373                               rconfig_addr + REMAP_OFFSET);
 374         if (err < 0) {
 375                 pr_err("TWL4030 Resource %d remap could not be read\n",
 376                         rconfig->resource);
 377                 return err;
 378         }
 379
 380         if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
 381                 remap &= ~OFF_STATE_MASK;
 382                 remap |= rconfig->remap_off << OFF_STATE_SHIFT;
 383         }
 384
 385         if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
 386                 remap &= ~SLEEP_STATE_MASK;
 387                 remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
 388         }
 389
 390         err = twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER,
 391                                remap,
 392                                rconfig_addr + REMAP_OFFSET);
 393         if (err < 0) {
 394                 pr_err("TWL4030 failed to program remap\n");
 395                 return err;
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int load_twl4030_script(struct twl4030_script *tscript,
 402                u8 address)
 403 {
 404         int err;
 405         static int order;
 406
 407         /* Make sure the script isn't going beyond last valid address (0x3f) */
 408         if ((address + tscript->size) > END_OF_SCRIPT) {
 409                 pr_err("TWL4030 scripts too big error\n");
 410                 return -EINVAL;
 411         }
 412
 413         err = twl4030_write_script(address, tscript->script, tscript->size);
 414         if (err)
 415                 goto out;
 416
 417         if (tscript->flags & TWL4030_WRST_SCRIPT) {
 418                 err = twl4030_config_warmreset_sequence(address);
 419                 if (err)
 420                         goto out;
 421         }
 422         if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
 423                 err = twl4030_config_wakeup12_sequence(address);
 424                 if (err)
 425                         goto out;
 426                 order = 1;
 427         }
 428         if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
 429                 err = twl4030_config_wakeup3_sequence(address);
 430                 if (err)
 431                         goto out;
 432         }
 433         if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
 434                 if (!order)
 435                         pr_warning("TWL4030: Bad order of scripts (sleep "\
 436                                         "script before wakeup) Leads to boot"\
 437                                         "failure on some boards\n");
 438                 err = twl4030_config_sleep_sequence(address);
 439         }
 440 out:
 441         return err;
 442 }
 443
 444 int twl4030_remove_script(u8 flags)
 445 {
 446         int err = 0;
 447
 448         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
 449                                TWL4030_PM_MASTER_PROTECT_KEY);
 450         if (err) {
 451                 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
 452                 return err;
 453         }
 454
 455         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
 456                                TWL4030_PM_MASTER_PROTECT_KEY);
 457         if (err) {
 458                 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
 459                 return err;
 460         }
 461
 462         if (flags & TWL4030_WRST_SCRIPT) {
 463                 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
 464                                        R_SEQ_ADD_WARM);
 465                 if (err)
 466                         return err;
 467         }
 468         if (flags & TWL4030_WAKEUP12_SCRIPT) {
 469                 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
 470                                        R_SEQ_ADD_S2A12);
 471                 if (err)
 472                         return err;
 473         }
 474         if (flags & TWL4030_WAKEUP3_SCRIPT) {
 475                 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
 476                                        R_SEQ_ADD_S2A3);
 477                 if (err)
 478                         return err;
 479         }
 480         if (flags & TWL4030_SLEEP_SCRIPT) {
 481                 err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, END_OF_SCRIPT,
 482                                        R_SEQ_ADD_A2S);
 483                 if (err)
 484                         return err;
 485         }
 486
 487         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
 488                                TWL4030_PM_MASTER_PROTECT_KEY);
 489         if (err)
 490                 pr_err("TWL4030 Unable to relock registers\n");
 491
 492         return err;
 493 }
 494
 495 /*
 496  * In master mode, start the power off sequence.
 497  * After a successful execution, TWL shuts down the power to the SoC
 498  * and all peripherals connected to it.
 499  */
 500 void twl4030_power_off(void)
 501 {
 502         int err;
 503
 504         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, PWR_DEVOFF,
 505                                TWL4030_PM_MASTER_P1_SW_EVENTS);
 506         if (err)
 507                 pr_err("TWL4030 Unable to power off\n");
 508 }
 509
 510 void twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
 511 {
 512         int err = 0;
 513         int i;
 514         struct twl4030_resconfig *resconfig;
 515         u8 val, address = twl4030_start_script_address;
 516
 517         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
 518                                TWL4030_PM_MASTER_PROTECT_KEY);
 519         if (err)
 520                 goto unlock;
 521
 522         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
 523                                TWL4030_PM_MASTER_PROTECT_KEY);
 524         if (err)
 525                 goto unlock;
 526
 527         for (i = 0; i < twl4030_scripts->num; i++) {
 528                 err = load_twl4030_script(twl4030_scripts->scripts[i], address);
 529                 if (err)
 530                         goto load;
 531                 address += twl4030_scripts->scripts[i]->size;
 532         }
 533
 534         resconfig = twl4030_scripts->resource_config;
 535         if (resconfig) {
 536                 while (resconfig->resource) {
 537                         err = twl4030_configure_resource(resconfig);
 538                         if (err)
 539                                 goto resource;
 540                         resconfig++;
 541
 542                 }
 543         }
 544
 545         /* Board has to be wired properly to use this feature */
 546         if (twl4030_scripts->use_poweroff && !pm_power_off) {
 547                 /* Default for SEQ_OFFSYNC is set, lets ensure this */
 548                 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &val,
 549                                       TWL4030_PM_MASTER_CFG_P123_TRANSITION);
 550                 if (err) {
 551                         pr_warning("TWL4030 Unable to read registers\n");
 552
 553                 } else if (!(val & SEQ_OFFSYNC)) {
 554                         val |= SEQ_OFFSYNC;
 555                         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, val,
 556                                         TWL4030_PM_MASTER_CFG_P123_TRANSITION);
 557                         if (err) {
 558                                 pr_err("TWL4030 Unable to setup SEQ_OFFSYNC\n");
 559                                 goto relock;
 560                         }
 561                 }
 562
 563                 pm_power_off = twl4030_power_off;
 564         }
 565
 566 relock:
 567         err = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
 568                                TWL4030_PM_MASTER_PROTECT_KEY);
 569         if (err)
 570                 pr_err("TWL4030 Unable to relock registers\n");
 571         return;
 572
 573 unlock:
 574         if (err)
 575                 pr_err("TWL4030 Unable to unlock registers\n");
 576         return;
 577 load:
 578         if (err)
 579                 pr_err("TWL4030 failed to load scripts\n");
 580         return;
 581 resource:
 582         if (err)
 583                 pr_err("TWL4030 failed to configure resource\n");
 584         return;
 585 }