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
  39 #define PHY_TO_OFF_PM_MASTER(p)         (p - 0x36)
  40 #define PHY_TO_OFF_PM_RECEIVER(p)       (p - 0x5b)
  41
  42 /* resource - hfclk */
  43 #define R_HFCLKOUT_DEV_GRP      PHY_TO_OFF_PM_RECEIVER(0xe6)
  44
  45 /* PM events */
  46 #define R_P1_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x46)
  47 #define R_P2_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x47)
  48 #define R_P3_SW_EVENTS          PHY_TO_OFF_PM_MASTER(0x48)
  49 #define R_CFG_P1_TRANSITION     PHY_TO_OFF_PM_MASTER(0x36)
  50 #define R_CFG_P2_TRANSITION     PHY_TO_OFF_PM_MASTER(0x37)
  51 #define R_CFG_P3_TRANSITION     PHY_TO_OFF_PM_MASTER(0x38)
  52
  53 #define LVL_WAKEUP      0x08
  54
  55 #define ENABLE_WARMRESET (1<<4)
  56
  57 #define END_OF_SCRIPT           0x3f
  58
  59 #define R_SEQ_ADD_A2S           PHY_TO_OFF_PM_MASTER(0x55)
  60 #define R_SEQ_ADD_S2A12         PHY_TO_OFF_PM_MASTER(0x56)
  61 #define R_SEQ_ADD_S2A3          PHY_TO_OFF_PM_MASTER(0x57)
  62 #define R_SEQ_ADD_WARM          PHY_TO_OFF_PM_MASTER(0x58)
  63 #define R_MEMORY_ADDRESS        PHY_TO_OFF_PM_MASTER(0x59)
  64 #define R_MEMORY_DATA           PHY_TO_OFF_PM_MASTER(0x5a)
  65
  66 /* resource configuration registers
  67    <RESOURCE>_DEV_GRP   at address 'n+0'
  68    <RESOURCE>_TYPE      at address 'n+1'
  69    <RESOURCE>_REMAP     at address 'n+2'
  70    <RESOURCE>_DEDICATED at address 'n+3'
  71 */
  72 #define DEV_GRP_OFFSET          0
  73 #define TYPE_OFFSET             1
  74 #define REMAP_OFFSET            2
  75 #define DEDICATED_OFFSET        3
  76
  77 /* Bit positions in the registers */
  78
  79 /* <RESOURCE>_DEV_GRP */
  80 #define DEV_GRP_SHIFT           5
  81 #define DEV_GRP_MASK            (7 << DEV_GRP_SHIFT)
  82
  83 /* <RESOURCE>_TYPE */
  84 #define TYPE_SHIFT              0
  85 #define TYPE_MASK               (7 << TYPE_SHIFT)
  86 #define TYPE2_SHIFT             3
  87 #define TYPE2_MASK              (3 << TYPE2_SHIFT)
  88
  89 /* <RESOURCE>_REMAP */
  90 #define SLEEP_STATE_SHIFT       0
  91 #define SLEEP_STATE_MASK        (0xf << SLEEP_STATE_SHIFT)
  92 #define OFF_STATE_SHIFT         4
  93 #define OFF_STATE_MASK          (0xf << OFF_STATE_SHIFT)
  94
  95 static u8 res_config_addrs[] = {
  96         [RES_VAUX1]     = 0x17,
  97         [RES_VAUX2]     = 0x1b,
  98         [RES_VAUX3]     = 0x1f,
  99         [RES_VAUX4]     = 0x23,
 100         [RES_VMMC1]     = 0x27,
 101         [RES_VMMC2]     = 0x2b,
 102         [RES_VPLL1]     = 0x2f,
 103         [RES_VPLL2]     = 0x33,
 104         [RES_VSIM]      = 0x37,
 105         [RES_VDAC]      = 0x3b,
 106         [RES_VINTANA1]  = 0x3f,
 107         [RES_VINTANA2]  = 0x43,
 108         [RES_VINTDIG]   = 0x47,
 109         [RES_VIO]       = 0x4b,
 110         [RES_VDD1]      = 0x55,
 111         [RES_VDD2]      = 0x63,
 112         [RES_VUSB_1V5]  = 0x71,
 113         [RES_VUSB_1V8]  = 0x74,
 114         [RES_VUSB_3V1]  = 0x77,
 115         [RES_VUSBCP]    = 0x7a,
 116         [RES_REGEN]     = 0x7f,
 117         [RES_NRES_PWRON] = 0x82,
 118         [RES_CLKEN]     = 0x85,
 119         [RES_SYSEN]     = 0x88,
 120         [RES_HFCLKOUT]  = 0x8b,
 121         [RES_32KCLKOUT] = 0x8e,
 122         [RES_RESET]     = 0x91,
 123         [RES_Main_Ref]  = 0x94,
 124 };
 125
 126 static int __init twl4030_write_script_byte(u8 address, u8 byte)
 127 {
 128         int err;
 129
 130         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
 131                                 R_MEMORY_ADDRESS);
 132         if (err)
 133                 goto out;
 134         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, byte,
 135                                 R_MEMORY_DATA);
 136 out:
 137         return err;
 138 }
 139
 140 static int __init twl4030_write_script_ins(u8 address, u16 pmb_message,
 141                                            u8 delay, u8 next)
 142 {
 143         int err;
 144
 145         address *= 4;
 146         err = twl4030_write_script_byte(address++, pmb_message >> 8);
 147         if (err)
 148                 goto out;
 149         err = twl4030_write_script_byte(address++, pmb_message & 0xff);
 150         if (err)
 151                 goto out;
 152         err = twl4030_write_script_byte(address++, delay);
 153         if (err)
 154                 goto out;
 155         err = twl4030_write_script_byte(address++, next);
 156 out:
 157         return err;
 158 }
 159
 160 static int __init twl4030_write_script(u8 address, struct twl4030_ins *script,
 161                                        int len)
 162 {
 163         int err;
 164
 165         for (; len; len--, address++, script++) {
 166                 if (len == 1) {
 167                         err = twl4030_write_script_ins(address,
 168                                                 script->pmb_message,
 169                                                 script->delay,
 170                                                 END_OF_SCRIPT);
 171                         if (err)
 172                                 break;
 173                 } else {
 174                         err = twl4030_write_script_ins(address,
 175                                                 script->pmb_message,
 176                                                 script->delay,
 177                                                 address + 1);
 178                         if (err)
 179                                 break;
 180                 }
 181         }
 182         return err;
 183 }
 184
 185 static int __init twl4030_config_wakeup3_sequence(u8 address)
 186 {
 187         int err;
 188         u8 data;
 189
 190         /* Set SLEEP to ACTIVE SEQ address for P3 */
 191         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
 192                                 R_SEQ_ADD_S2A3);
 193         if (err)
 194                 goto out;
 195
 196         /* P3 LVL_WAKEUP should be on LEVEL */
 197         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
 198                                 R_P3_SW_EVENTS);
 199         if (err)
 200                 goto out;
 201         data |= LVL_WAKEUP;
 202         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
 203                                 R_P3_SW_EVENTS);
 204 out:
 205         if (err)
 206                 pr_err("TWL4030 wakeup sequence for P3 config error\n");
 207         return err;
 208 }
 209
 210 static int __init twl4030_config_wakeup12_sequence(u8 address)
 211 {
 212         int err = 0;
 213         u8 data;
 214
 215         /* Set SLEEP to ACTIVE SEQ address for P1 and P2 */
 216         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
 217                                 R_SEQ_ADD_S2A12);
 218         if (err)
 219                 goto out;
 220
 221         /* P1/P2 LVL_WAKEUP should be on LEVEL */
 222         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
 223                                 R_P1_SW_EVENTS);
 224         if (err)
 225                 goto out;
 226
 227         data |= LVL_WAKEUP;
 228         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
 229                                 R_P1_SW_EVENTS);
 230         if (err)
 231                 goto out;
 232
 233         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
 234                                 R_P2_SW_EVENTS);
 235         if (err)
 236                 goto out;
 237
 238         data |= LVL_WAKEUP;
 239         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data,
 240                                 R_P2_SW_EVENTS);
 241         if (err)
 242                 goto out;
 243
 244         if (machine_is_omap_3430sdp() || machine_is_omap_ldp()) {
 245                 /* Disabling AC charger effect on sleep-active transitions */
 246                 err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &data,
 247                                         R_CFG_P1_TRANSITION);
 248                 if (err)
 249                         goto out;
 250                 data &= ~(1<<1);
 251                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, data ,
 252                                         R_CFG_P1_TRANSITION);
 253                 if (err)
 254                         goto out;
 255         }
 256
 257 out:
 258         if (err)
 259                 pr_err("TWL4030 wakeup sequence for P1 and P2" \
 260                         "config error\n");
 261         return err;
 262 }
 263
 264 static int __init twl4030_config_sleep_sequence(u8 address)
 265 {
 266         int err;
 267
 268         /* Set ACTIVE to SLEEP SEQ address in T2 memory*/
 269         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
 270                                 R_SEQ_ADD_A2S);
 271
 272         if (err)
 273                 pr_err("TWL4030 sleep sequence config error\n");
 274
 275         return err;
 276 }
 277
 278 static int __init twl4030_config_warmreset_sequence(u8 address)
 279 {
 280         int err;
 281         u8 rd_data;
 282
 283         /* Set WARM RESET SEQ address for P1 */
 284         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, address,
 285                                 R_SEQ_ADD_WARM);
 286         if (err)
 287                 goto out;
 288
 289         /* P1/P2/P3 enable WARMRESET */
 290         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
 291                                 R_P1_SW_EVENTS);
 292         if (err)
 293                 goto out;
 294
 295         rd_data |= ENABLE_WARMRESET;
 296         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
 297                                 R_P1_SW_EVENTS);
 298         if (err)
 299                 goto out;
 300
 301         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
 302                                 R_P2_SW_EVENTS);
 303         if (err)
 304                 goto out;
 305
 306         rd_data |= ENABLE_WARMRESET;
 307         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
 308                                 R_P2_SW_EVENTS);
 309         if (err)
 310                 goto out;
 311
 312         err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &rd_data,
 313                                 R_P3_SW_EVENTS);
 314         if (err)
 315                 goto out;
 316
 317         rd_data |= ENABLE_WARMRESET;
 318         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, rd_data,
 319                                 R_P3_SW_EVENTS);
 320 out:
 321         if (err)
 322                 pr_err("TWL4030 warmreset seq config error\n");
 323         return err;
 324 }
 325
 326 static int __init twl4030_configure_resource(struct twl4030_resconfig *rconfig)
 327 {
 328         int rconfig_addr;
 329         int err;
 330         u8 type;
 331         u8 grp;
 332         u8 remap;
 333
 334         if (rconfig->resource > TOTAL_RESOURCES) {
 335                 pr_err("TWL4030 Resource %d does not exist\n",
 336                         rconfig->resource);
 337                 return -EINVAL;
 338         }
 339
 340         rconfig_addr = res_config_addrs[rconfig->resource];
 341
 342         /* Set resource group */
 343         err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &grp,
 344                               rconfig_addr + DEV_GRP_OFFSET);
 345         if (err) {
 346                 pr_err("TWL4030 Resource %d group could not be read\n",
 347                         rconfig->resource);
 348                 return err;
 349         }
 350
 351         if (rconfig->devgroup != TWL4030_RESCONFIG_UNDEF) {
 352                 grp &= ~DEV_GRP_MASK;
 353                 grp |= rconfig->devgroup << DEV_GRP_SHIFT;
 354                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 355                                        grp, rconfig_addr + DEV_GRP_OFFSET);
 356                 if (err < 0) {
 357                         pr_err("TWL4030 failed to program devgroup\n");
 358                         return err;
 359                 }
 360         }
 361
 362         /* Set resource types */
 363         err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &type,
 364                                 rconfig_addr + TYPE_OFFSET);
 365         if (err < 0) {
 366                 pr_err("TWL4030 Resource %d type could not be read\n",
 367                         rconfig->resource);
 368                 return err;
 369         }
 370
 371         if (rconfig->type != TWL4030_RESCONFIG_UNDEF) {
 372                 type &= ~TYPE_MASK;
 373                 type |= rconfig->type << TYPE_SHIFT;
 374         }
 375
 376         if (rconfig->type2 != TWL4030_RESCONFIG_UNDEF) {
 377                 type &= ~TYPE2_MASK;
 378                 type |= rconfig->type2 << TYPE2_SHIFT;
 379         }
 380
 381         err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 382                                 type, rconfig_addr + TYPE_OFFSET);
 383         if (err < 0) {
 384                 pr_err("TWL4030 failed to program resource type\n");
 385                 return err;
 386         }
 387
 388         /* Set remap states */
 389         err = twl_i2c_read_u8(TWL4030_MODULE_PM_RECEIVER, &remap,
 390                               rconfig_addr + REMAP_OFFSET);
 391         if (err < 0) {
 392                 pr_err("TWL4030 Resource %d remap could not be read\n",
 393                         rconfig->resource);
 394                 return err;
 395         }
 396
 397         if (rconfig->remap_off != TWL4030_RESCONFIG_UNDEF) {
 398                 remap &= ~OFF_STATE_MASK;
 399                 remap |= rconfig->remap_off << OFF_STATE_SHIFT;
 400         }
 401
 402         if (rconfig->remap_sleep != TWL4030_RESCONFIG_UNDEF) {
 403                 remap &= ~SLEEP_STATE_MASK;
 404                 remap |= rconfig->remap_sleep << SLEEP_STATE_SHIFT;
 405         }
 406
 407         err = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
 408                                remap,
 409                                rconfig_addr + REMAP_OFFSET);
 410         if (err < 0) {
 411                 pr_err("TWL4030 failed to program remap\n");
 412                 return err;
 413         }
 414
 415         return 0;
 416 }
 417
 418 static int __init load_twl4030_script(struct twl4030_script *tscript,
 419                u8 address)
 420 {
 421         int err;
 422         static int order;
 423
 424         /* Make sure the script isn't going beyond last valid address (0x3f) */
 425         if ((address + tscript->size) > END_OF_SCRIPT) {
 426                 pr_err("TWL4030 scripts too big error\n");
 427                 return -EINVAL;
 428         }
 429
 430         err = twl4030_write_script(address, tscript->script, tscript->size);
 431         if (err)
 432                 goto out;
 433
 434         if (tscript->flags & TWL4030_WRST_SCRIPT) {
 435                 err = twl4030_config_warmreset_sequence(address);
 436                 if (err)
 437                         goto out;
 438         }
 439         if (tscript->flags & TWL4030_WAKEUP12_SCRIPT) {
 440                 err = twl4030_config_wakeup12_sequence(address);
 441                 if (err)
 442                         goto out;
 443                 order = 1;
 444         }
 445         if (tscript->flags & TWL4030_WAKEUP3_SCRIPT) {
 446                 err = twl4030_config_wakeup3_sequence(address);
 447                 if (err)
 448                         goto out;
 449         }
 450         if (tscript->flags & TWL4030_SLEEP_SCRIPT) {
 451                 if (order)
 452                         pr_warning("TWL4030: Bad order of scripts (sleep "\
 453                                         "script before wakeup) Leads to boot"\
 454                                         "failure on some boards\n");
 455                 err = twl4030_config_sleep_sequence(address);
 456         }
 457 out:
 458         return err;
 459 }
 460
 461 int twl4030_remove_script(u8 flags)
 462 {
 463         int err = 0;
 464
 465         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 466                         TWL4030_PM_MASTER_KEY_CFG1,
 467                         TWL4030_PM_MASTER_PROTECT_KEY);
 468         if (err) {
 469                 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
 470                 return err;
 471         }
 472
 473         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 474                         TWL4030_PM_MASTER_KEY_CFG2,
 475                         TWL4030_PM_MASTER_PROTECT_KEY);
 476         if (err) {
 477                 pr_err("twl4030: unable to unlock PROTECT_KEY\n");
 478                 return err;
 479         }
 480
 481         if (flags & TWL4030_WRST_SCRIPT) {
 482                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
 483                                 R_SEQ_ADD_WARM);
 484                 if (err)
 485                         return err;
 486         }
 487         if (flags & TWL4030_WAKEUP12_SCRIPT) {
 488                 if (err)
 489                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
 490                                 R_SEQ_ADD_S2A12);
 491                         return err;
 492         }
 493         if (flags & TWL4030_WAKEUP3_SCRIPT) {
 494                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
 495                                 R_SEQ_ADD_S2A3);
 496                 if (err)
 497                         return err;
 498         }
 499         if (flags & TWL4030_SLEEP_SCRIPT) {
 500                 err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, END_OF_SCRIPT,
 501                                 R_SEQ_ADD_A2S);
 502                 if (err)
 503                         return err;
 504         }
 505
 506         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
 507                         TWL4030_PM_MASTER_PROTECT_KEY);
 508         if (err)
 509                 pr_err("TWL4030 Unable to relock registers\n");
 510
 511         return err;
 512 }
 513
 514 void __init twl4030_power_init(struct twl4030_power_data *twl4030_scripts)
 515 {
 516         int err = 0;
 517         int i;
 518         struct twl4030_resconfig *resconfig;
 519         u8 address = twl4030_start_script_address;
 520
 521         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 522                         TWL4030_PM_MASTER_KEY_CFG1,
 523                         TWL4030_PM_MASTER_PROTECT_KEY);
 524         if (err)
 525                 goto unlock;
 526
 527         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 528                         TWL4030_PM_MASTER_KEY_CFG2,
 529                         TWL4030_PM_MASTER_PROTECT_KEY);
 530         if (err)
 531                 goto unlock;
 532
 533         for (i = 0; i < twl4030_scripts->num; i++) {
 534                 err = load_twl4030_script(twl4030_scripts->scripts[i], address);
 535                 if (err)
 536                         goto load;
 537                 address += twl4030_scripts->scripts[i]->size;
 538         }
 539
 540         resconfig = twl4030_scripts->resource_config;
 541         if (resconfig) {
 542                 while (resconfig->resource) {
 543                         err = twl4030_configure_resource(resconfig);
 544                         if (err)
 545                                 goto resource;
 546                         resconfig++;
 547
 548                 }
 549         }
 550
 551         err = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
 552                         TWL4030_PM_MASTER_PROTECT_KEY);
 553         if (err)
 554                 pr_err("TWL4030 Unable to relock registers\n");
 555         return;
 556
 557 unlock:
 558         if (err)
 559                 pr_err("TWL4030 Unable to unlock registers\n");
 560         return;
 561 load:
 562         if (err)
 563                 pr_err("TWL4030 failed to load scripts\n");
 564         return;
 565 resource:
 566         if (err)
 567                 pr_err("TWL4030 failed to configure resource\n");
 568         return;
 569 }