arch/arm/mach-omap2/pm34xx.c

   1 /*
   2  * linux/arch/arm/mach-omap2/pm34xx.c
   3  *
   4  * OMAP3 Power Management Routines
   5  *
   6  * Copyright (C) 2006-2008 Nokia Corporation
   7  * Tony Lindgren <tony@atomide.com>
   8  * Jouni Hogander
   9  *
  10  * Copyright (C) 2005 Texas Instruments, Inc.
  11  * Richard Woodruff <r-woodruff2@ti.com>
  12  *
  13  * Based on pm.c for omap1
  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 version 2 as
  17  * published by the Free Software Foundation.
  18  */
  19
  20 #include <linux/pm.h>
  21 #include <linux/suspend.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/module.h>
  24 #include <linux/list.h>
  25 #include <linux/err.h>
  26
  27 #include <mach/gpio.h>
  28 #include <mach/sram.h>
  29 #include <mach/pm.h>
  30 #include <mach/clockdomain.h>
  31 #include <mach/powerdomain.h>
  32 #include <mach/serial.h>
  33 #include <mach/control.h>
  34
  35 #include "cm.h"
  36 #include "cm-regbits-34xx.h"
  37 #include "prm-regbits-34xx.h"
  38
  39 #include "prm.h"
  40 #include "pm.h"
  41 #include "smartreflex.h"
  42
  43 struct power_state {
  44         struct powerdomain *pwrdm;
  45         u32 next_state;
  46         u32 saved_state;
  47         struct list_head node;
  48 };
  49
  50 static LIST_HEAD(pwrst_list);
  51
  52 static void (*_omap_sram_idle)(u32 *addr, int save_state);
  53
  54 static void (*saved_idle)(void);
  55
  56 static struct powerdomain *mpu_pwrdm;
  57
  58 /* PRCM Interrupt Handler for wakeups */
  59 static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
  60 {
  61         u32 wkst, irqstatus_mpu;
  62         u32 fclk, iclk;
  63
  64         /* WKUP */
  65         wkst = prm_read_mod_reg(WKUP_MOD, PM_WKST);
  66         if (wkst) {
  67                 iclk = cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
  68                 fclk = cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
  69                 cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_ICLKEN);
  70                 cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_FCLKEN);
  71                 prm_write_mod_reg(wkst, WKUP_MOD, PM_WKST);
  72                 while (prm_read_mod_reg(WKUP_MOD, PM_WKST));
  73                 cm_write_mod_reg(iclk, WKUP_MOD, CM_ICLKEN);
  74                 cm_write_mod_reg(fclk, WKUP_MOD, CM_FCLKEN);
  75         }
  76
  77         /* CORE */
  78         wkst = prm_read_mod_reg(CORE_MOD, PM_WKST1);
  79         if (wkst) {
  80                 iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
  81                 fclk = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
  82                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN1);
  83                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_FCLKEN1);
  84                 prm_write_mod_reg(wkst, CORE_MOD, PM_WKST1);
  85                 while (prm_read_mod_reg(CORE_MOD, PM_WKST1));
  86                 cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN1);
  87                 cm_write_mod_reg(fclk, CORE_MOD, CM_FCLKEN1);
  88         }
  89         wkst = prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3);
  90         if (wkst) {
  91                 iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
  92                 fclk = cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  93                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN3);
  94                 cm_set_mod_reg_bits(wkst, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  95                 prm_write_mod_reg(wkst, CORE_MOD, OMAP3430ES2_PM_WKST3);
  96                 while (prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3));
  97                 cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN3);
  98                 cm_write_mod_reg(fclk, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  99         }
 100
 101         /* PER */
 102         wkst = prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST);
 103         if (wkst) {
 104                 iclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
 105                 fclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
 106                 cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_ICLKEN);
 107                 cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_FCLKEN);
 108                 prm_write_mod_reg(wkst, OMAP3430_PER_MOD, PM_WKST);
 109                 while (prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST));
 110                 cm_write_mod_reg(iclk, OMAP3430_PER_MOD, CM_ICLKEN);
 111                 cm_write_mod_reg(fclk, OMAP3430_PER_MOD, CM_FCLKEN);
 112         }
 113
 114         if (omap_rev() > OMAP3430_REV_ES1_0) {
 115                 /* USBHOST */
 116                 wkst = prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, PM_WKST);
 117                 if (wkst) {
 118                         iclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 119                                                CM_ICLKEN);
 120                         fclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 121                                                CM_FCLKEN);
 122                         cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
 123                                          CM_ICLKEN);
 124                         cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
 125                                          CM_FCLKEN);
 126                         prm_write_mod_reg(wkst, OMAP3430ES2_USBHOST_MOD,
 127                                           PM_WKST);
 128                         while (prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 129                                                 PM_WKST));
 130                         cm_write_mod_reg(iclk, OMAP3430ES2_USBHOST_MOD,
 131                                          CM_ICLKEN);
 132                         cm_write_mod_reg(fclk, OMAP3430ES2_USBHOST_MOD,
 133                                          CM_FCLKEN);
 134                 }
 135         }
 136
 137         irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
 138                                         OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
 139         prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
 140                                         OMAP2_PRM_IRQSTATUS_MPU_OFFSET);
 141
 142         while (prm_read_mod_reg(OCP_MOD, OMAP2_PRM_IRQSTATUS_MPU_OFFSET));
 143
 144         return IRQ_HANDLED;
 145 }
 146
 147 static void omap_sram_idle(void)
 148 {
 149         /* Variable to tell what needs to be saved and restored
 150          * in omap_sram_idle*/
 151         /* save_state = 0 => Nothing to save and restored */
 152         /* save_state = 1 => Only L1 and logic lost */
 153         /* save_state = 2 => Only L2 lost */
 154         /* save_state = 3 => L1, L2 and logic lost */
 155         int save_state = 0, mpu_next_state;
 156
 157         if (!_omap_sram_idle)
 158                 return;
 159
 160         mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
 161         switch (mpu_next_state) {
 162         case PWRDM_POWER_RET:
 163                 /* No need to save context */
 164                 save_state = 0;
 165                 break;
 166         default:
 167                 /* Invalid state */
 168                 printk(KERN_ERR "Invalid mpu state in sram_idle\n");
 169                 return;
 170         }
 171         /* Disable smartreflex before entering WFI */
 172         disable_smartreflex(SR1);
 173         disable_smartreflex(SR2);
 174
 175         omap2_gpio_prepare_for_retention();
 176         omap_uart_prepare_idle(0);
 177         omap_uart_prepare_idle(1);
 178         omap_uart_prepare_idle(2);
 179
 180         _omap_sram_idle(NULL, save_state);
 181
 182         omap_uart_resume_idle(2);
 183         omap_uart_resume_idle(1);
 184         omap_uart_resume_idle(0);
 185         omap2_gpio_resume_after_retention();
 186
 187         /* Enable smartreflex after WFI */
 188         enable_smartreflex(SR1);
 189         enable_smartreflex(SR2);
 190 }
 191
 192 /*
 193  * Check if functional clocks are enabled before entering
 194  * sleep. This function could be behind CONFIG_PM_DEBUG
 195  * when all drivers are configuring their sysconfig registers
 196  * properly and using their clocks properly.
 197  */
 198 static int omap3_fclks_active(void)
 199 {
 200         u32 fck_core1 = 0, fck_core3 = 0, fck_sgx = 0, fck_dss = 0,
 201                 fck_cam = 0, fck_per = 0, fck_usbhost = 0;
 202
 203         fck_core1 = cm_read_mod_reg(CORE_MOD,
 204                                     CM_FCLKEN1);
 205         if (omap_rev() > OMAP3430_REV_ES1_0) {
 206                 fck_core3 = cm_read_mod_reg(CORE_MOD,
 207                                             OMAP3430ES2_CM_FCLKEN3);
 208                 fck_sgx = cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
 209                                           CM_FCLKEN);
 210                 fck_usbhost = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 211                                               CM_FCLKEN);
 212         } else
 213                 fck_sgx = cm_read_mod_reg(GFX_MOD,
 214                                           OMAP3430ES2_CM_FCLKEN3);
 215         fck_dss = cm_read_mod_reg(OMAP3430_DSS_MOD,
 216                                   CM_FCLKEN);
 217         fck_cam = cm_read_mod_reg(OMAP3430_CAM_MOD,
 218                                   CM_FCLKEN);
 219         fck_per = cm_read_mod_reg(OMAP3430_PER_MOD,
 220                                   CM_FCLKEN);
 221
 222         /* Ignore UART clocks.  These are handled by UART core (serial.c) */
 223         fck_core1 &= ~(OMAP3430_EN_UART1 | OMAP3430_EN_UART2);
 224         fck_per &= ~OMAP3430_EN_UART3;
 225
 226         if (fck_core1 | fck_core3 | fck_sgx | fck_dss |
 227             fck_cam | fck_per | fck_usbhost)
 228                 return 1;
 229         return 0;
 230 }
 231
 232 static int omap3_can_sleep(void)
 233 {
 234         if (!enable_dyn_sleep)
 235                 return 0;
 236         if (!omap_uart_can_sleep())
 237                 return 0;
 238         if (omap3_fclks_active())
 239                 return 0;
 240         if (atomic_read(&sleep_block) > 0)
 241                 return 0;
 242         return 1;
 243 }
 244
 245 /* This sets pwrdm state (other than mpu & core. Currently only ON &
 246  * RET are supported. Function is assuming that clkdm doesn't have
 247  * hw_sup mode enabled. */
 248 static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
 249 {
 250         u32 cur_state;
 251         int sleep_switch = 0;
 252         int ret = 0;
 253
 254         if (pwrdm == NULL || IS_ERR(pwrdm))
 255                 return -EINVAL;
 256
 257         while (!(pwrdm->pwrsts & (1 << state))) {
 258                 if (state == PWRDM_POWER_OFF)
 259                         return ret;
 260                 state--;
 261         }
 262
 263         cur_state = pwrdm_read_next_pwrst(pwrdm);
 264         if (cur_state == state)
 265                 return ret;
 266
 267         if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
 268                 omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
 269                 sleep_switch = 1;
 270                 pwrdm_wait_transition(pwrdm);
 271         }
 272
 273         ret = pwrdm_set_next_pwrst(pwrdm, state);
 274         if (ret) {
 275                 printk(KERN_ERR "Unable to set state of powerdomain: %s\n",
 276                        pwrdm->name);
 277                 goto err;
 278         }
 279
 280         if (sleep_switch) {
 281                 omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
 282                 pwrdm_wait_transition(pwrdm);
 283         }
 284
 285 err:
 286         return ret;
 287 }
 288
 289 static void omap3_pm_idle(void)
 290 {
 291         local_irq_disable();
 292         local_fiq_disable();
 293
 294         if (!omap3_can_sleep())
 295                 goto out;
 296
 297         if (omap_irq_pending())
 298                 goto out;
 299
 300         omap_sram_idle();
 301
 302 out:
 303         local_fiq_enable();
 304         local_irq_enable();
 305 }
 306
 307 static int omap3_pm_prepare(void)
 308 {
 309         saved_idle = pm_idle;
 310         pm_idle = NULL;
 311         return 0;
 312 }
 313
 314 static int omap3_pm_suspend(void)
 315 {
 316         struct power_state *pwrst;
 317         int state, ret = 0;
 318
 319         /* Read current next_pwrsts */
 320         list_for_each_entry(pwrst, &pwrst_list, node)
 321                 pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
 322         /* Set ones wanted by suspend */
 323         list_for_each_entry(pwrst, &pwrst_list, node) {
 324                 if (set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))
 325                         goto restore;
 326                 if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))
 327                         goto restore;
 328         }
 329
 330         omap_uart_prepare_suspend();
 331         omap_sram_idle();
 332
 333 restore:
 334         /* Restore next_pwrsts */
 335         list_for_each_entry(pwrst, &pwrst_list, node) {
 336                 set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
 337                 state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
 338                 if (state > pwrst->next_state) {
 339                         printk(KERN_INFO "Powerdomain (%s) didn't enter "
 340                                "target state %d\n",
 341                                pwrst->pwrdm->name, pwrst->next_state);
 342                         ret = -1;
 343                 }
 344         }
 345         if (ret)
 346                 printk(KERN_ERR "Could not enter target state in pm_suspend\n");
 347         else
 348                 printk(KERN_INFO "Successfully put all powerdomains "
 349                        "to target state\n");
 350
 351         return ret;
 352 }
 353
 354 static int omap3_pm_enter(suspend_state_t state)
 355 {
 356         int ret = 0;
 357
 358         switch (state) {
 359         case PM_SUSPEND_STANDBY:
 360         case PM_SUSPEND_MEM:
 361                 ret = omap3_pm_suspend();
 362                 break;
 363         default:
 364                 ret = -EINVAL;
 365         }
 366
 367         return ret;
 368 }
 369
 370 static void omap3_pm_finish(void)
 371 {
 372         pm_idle = saved_idle;
 373 }
 374
 375 static struct platform_suspend_ops omap_pm_ops = {
 376         .prepare        = omap3_pm_prepare,
 377         .enter          = omap3_pm_enter,
 378         .finish         = omap3_pm_finish,
 379         .valid          = suspend_valid_only_mem,
 380 };
 381
 382
 383 /**
 384  * omap3_iva_idle(): ensure IVA is in idle so it can be put into
 385  *                   retention
 386  *
 387  * In cases where IVA2 is activated by bootcode, it may prevent
 388  * full-chip retention or off-mode because it is not idle.  This
 389  * function forces the IVA2 into idle state so it can go
 390  * into retention/off and thus allow full-chip retention/off.
 391  *
 392  **/
 393 static void __init omap3_iva_idle(void)
 394 {
 395         /* ensure IVA2 clock is disabled */
 396         cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
 397
 398         /* Reset IVA2 */
 399         prm_write_mod_reg(OMAP3430_RST1_IVA2 |
 400                           OMAP3430_RST2_IVA2 |
 401                           OMAP3430_RST3_IVA2,
 402                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 403
 404         /* Enable IVA2 clock */
 405         cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2,
 406                          OMAP3430_IVA2_MOD, CM_FCLKEN);
 407
 408         /* Set IVA2 boot mode to 'idle' */
 409         omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
 410                          OMAP343X_CONTROL_IVA2_BOOTMOD);
 411
 412         /* Un-reset IVA2 */
 413         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, RM_RSTCTRL);
 414
 415         /* Disable IVA2 clock */
 416         cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
 417
 418         /* Reset IVA2 */
 419         prm_write_mod_reg(OMAP3430_RST1_IVA2 |
 420                           OMAP3430_RST2_IVA2 |
 421                           OMAP3430_RST3_IVA2,
 422                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 423 }
 424
 425 static void __init prcm_setup_regs(void)
 426 {
 427         /* reset modem */
 428         prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
 429                           OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
 430                           CORE_MOD, RM_RSTCTRL);
 431         prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
 432
 433         /* XXX Reset all wkdeps. This should be done when initializing
 434          * powerdomains */
 435         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
 436         prm_write_mod_reg(0, MPU_MOD, PM_WKDEP);
 437         prm_write_mod_reg(0, OMAP3430_DSS_MOD, PM_WKDEP);
 438         prm_write_mod_reg(0, OMAP3430_NEON_MOD, PM_WKDEP);
 439         prm_write_mod_reg(0, OMAP3430_CAM_MOD, PM_WKDEP);
 440         prm_write_mod_reg(0, OMAP3430_PER_MOD, PM_WKDEP);
 441         if (omap_rev() > OMAP3430_REV_ES1_0) {
 442                 prm_write_mod_reg(0, OMAP3430ES2_SGX_MOD, PM_WKDEP);
 443                 prm_write_mod_reg(0, OMAP3430ES2_USBHOST_MOD, PM_WKDEP);
 444         } else
 445                 prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
 446
 447         /*
 448          * Enable interface clock autoidle for all modules.
 449          * Note that in the long run this should be done by clockfw
 450          */
 451         cm_write_mod_reg(
 452                 OMAP3430ES2_AUTO_MMC3 |
 453                 OMAP3430ES2_AUTO_ICR |
 454                 OMAP3430_AUTO_AES2 |
 455                 OMAP3430_AUTO_SHA12 |
 456                 OMAP3430_AUTO_DES2 |
 457                 OMAP3430_AUTO_MMC2 |
 458                 OMAP3430_AUTO_MMC1 |
 459                 OMAP3430_AUTO_MSPRO |
 460                 OMAP3430_AUTO_HDQ |
 461                 OMAP3430_AUTO_MCSPI4 |
 462                 OMAP3430_AUTO_MCSPI3 |
 463                 OMAP3430_AUTO_MCSPI2 |
 464                 OMAP3430_AUTO_MCSPI1 |
 465                 OMAP3430_AUTO_I2C3 |
 466                 OMAP3430_AUTO_I2C2 |
 467                 OMAP3430_AUTO_I2C1 |
 468                 OMAP3430_AUTO_UART2 |
 469                 OMAP3430_AUTO_UART1 |
 470                 OMAP3430_AUTO_GPT11 |
 471                 OMAP3430_AUTO_GPT10 |
 472                 OMAP3430_AUTO_MCBSP5 |
 473                 OMAP3430_AUTO_MCBSP1 |
 474                 OMAP3430ES1_AUTO_FAC | /* This is es1 only */
 475                 OMAP3430_AUTO_MAILBOXES |
 476                 OMAP3430_AUTO_OMAPCTRL |
 477                 OMAP3430ES1_AUTO_FSHOSTUSB |
 478                 OMAP3430_AUTO_HSOTGUSB |
 479                 OMAP3430ES1_AUTO_D2D | /* This is es1 only */
 480                 OMAP3430_AUTO_SSI,
 481                 CORE_MOD, CM_AUTOIDLE1);
 482
 483         cm_write_mod_reg(
 484                 OMAP3430_AUTO_PKA |
 485                 OMAP3430_AUTO_AES1 |
 486                 OMAP3430_AUTO_RNG |
 487                 OMAP3430_AUTO_SHA11 |
 488                 OMAP3430_AUTO_DES1,
 489                 CORE_MOD, CM_AUTOIDLE2);
 490
 491         if (omap_rev() > OMAP3430_REV_ES1_0) {
 492                 cm_write_mod_reg(
 493                         OMAP3430ES2_AUTO_USBTLL,
 494                         CORE_MOD, CM_AUTOIDLE3);
 495         }
 496
 497         cm_write_mod_reg(
 498                 OMAP3430_AUTO_WDT2 |
 499                 OMAP3430_AUTO_WDT1 |
 500                 OMAP3430_AUTO_GPIO1 |
 501                 OMAP3430_AUTO_32KSYNC |
 502                 OMAP3430_AUTO_GPT12 |
 503                 OMAP3430_AUTO_GPT1 ,
 504                 WKUP_MOD, CM_AUTOIDLE);
 505
 506         cm_write_mod_reg(
 507                 OMAP3430_AUTO_DSS,
 508                 OMAP3430_DSS_MOD,
 509                 CM_AUTOIDLE);
 510
 511         cm_write_mod_reg(
 512                 OMAP3430_AUTO_CAM,
 513                 OMAP3430_CAM_MOD,
 514                 CM_AUTOIDLE);
 515
 516         cm_write_mod_reg(
 517                 OMAP3430_AUTO_GPIO6 |
 518                 OMAP3430_AUTO_GPIO5 |
 519                 OMAP3430_AUTO_GPIO4 |
 520                 OMAP3430_AUTO_GPIO3 |
 521                 OMAP3430_AUTO_GPIO2 |
 522                 OMAP3430_AUTO_WDT3 |
 523                 OMAP3430_AUTO_UART3 |
 524                 OMAP3430_AUTO_GPT9 |
 525                 OMAP3430_AUTO_GPT8 |
 526                 OMAP3430_AUTO_GPT7 |
 527                 OMAP3430_AUTO_GPT6 |
 528                 OMAP3430_AUTO_GPT5 |
 529                 OMAP3430_AUTO_GPT4 |
 530                 OMAP3430_AUTO_GPT3 |
 531                 OMAP3430_AUTO_GPT2 |
 532                 OMAP3430_AUTO_MCBSP4 |
 533                 OMAP3430_AUTO_MCBSP3 |
 534                 OMAP3430_AUTO_MCBSP2,
 535                 OMAP3430_PER_MOD,
 536                 CM_AUTOIDLE);
 537
 538         if (omap_rev() > OMAP3430_REV_ES1_0) {
 539                 cm_write_mod_reg(
 540                         OMAP3430ES2_AUTO_USBHOST,
 541                         OMAP3430ES2_USBHOST_MOD,
 542                         CM_AUTOIDLE);
 543         }
 544
 545         /*
 546          * Set all plls to autoidle. This is needed until autoidle is
 547          * enabled by clockfw
 548          */
 549         cm_write_mod_reg(1 << OMAP3430_AUTO_IVA2_DPLL_SHIFT,
 550                          OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
 551         cm_write_mod_reg(1 << OMAP3430_AUTO_MPU_DPLL_SHIFT,
 552                          MPU_MOD,
 553                          CM_AUTOIDLE2);
 554         cm_write_mod_reg((1 << OMAP3430_AUTO_PERIPH_DPLL_SHIFT) |
 555                          (1 << OMAP3430_AUTO_CORE_DPLL_SHIFT),
 556                          PLL_MOD,
 557                          CM_AUTOIDLE);
 558         cm_write_mod_reg(1 << OMAP3430ES2_AUTO_PERIPH2_DPLL_SHIFT,
 559                          PLL_MOD,
 560                          CM_AUTOIDLE2);
 561
 562         /*
 563          * Enable control of expternal oscillator through
 564          * sys_clkreq. In the long run clock framework should
 565          * take care of this.
 566          */
 567         prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
 568                              1 << OMAP_AUTOEXTCLKMODE_SHIFT,
 569                              OMAP3430_GR_MOD,
 570                              OMAP3_PRM_CLKSRC_CTRL_OFFSET);
 571
 572         /* setup wakup source */
 573         prm_write_mod_reg(OMAP3430_EN_IO | OMAP3430_EN_GPIO1 |
 574                           OMAP3430_EN_GPT1 | OMAP3430_EN_GPT12,
 575                           WKUP_MOD, PM_WKEN);
 576         /* No need to write EN_IO, that is always enabled */
 577         prm_write_mod_reg(OMAP3430_EN_GPIO1 | OMAP3430_EN_GPT1 |
 578                           OMAP3430_EN_GPT12,
 579                           WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
 580         /* For some reason IO doesn't generate wakeup event even if
 581          * it is selected to mpu wakeup goup */
 582         prm_write_mod_reg(OMAP3430_IO_EN | OMAP3430_WKUP_EN,
 583                         OCP_MOD, OMAP2_PRM_IRQENABLE_MPU_OFFSET);
 584
 585         omap3_iva_idle();
 586 }
 587
 588 static int __init pwrdms_setup(struct powerdomain *pwrdm)
 589 {
 590         struct power_state *pwrst;
 591
 592         if (!pwrdm->pwrsts)
 593                 return 0;
 594
 595         pwrst = kmalloc(sizeof(struct power_state), GFP_KERNEL);
 596         if (!pwrst)
 597                 return -ENOMEM;
 598         pwrst->pwrdm = pwrdm;
 599         pwrst->next_state = PWRDM_POWER_RET;
 600         list_add(&pwrst->node, &pwrst_list);
 601
 602         if (pwrdm_has_hdwr_sar(pwrdm))
 603                 pwrdm_enable_hdwr_sar(pwrdm);
 604
 605         return set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
 606 }
 607
 608 /*
 609  * Enable hw supervised mode for all clockdomains if it's
 610  * supported. Initiate sleep transition for other clockdomains, if
 611  * they are not used
 612  */
 613 static int __init clkdms_setup(struct clockdomain *clkdm)
 614 {
 615         if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO)
 616                 omap2_clkdm_allow_idle(clkdm);
 617         else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP &&
 618                  atomic_read(&clkdm->usecount) == 0)
 619                 omap2_clkdm_sleep(clkdm);
 620         return 0;
 621 }
 622
 623 int __init omap3_pm_init(void)
 624 {
 625         struct power_state *pwrst, *tmp;
 626         int ret;
 627
 628         printk(KERN_ERR "Power Management for TI OMAP3.\n");
 629
 630         /* XXX prcm_setup_regs needs to be before enabling hw
 631          * supervised mode for powerdomains */
 632         prcm_setup_regs();
 633
 634         ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
 635                           (irq_handler_t)prcm_interrupt_handler,
 636                           IRQF_DISABLED, "prcm", NULL);
 637         if (ret) {
 638                 printk(KERN_ERR "request_irq failed to register for 0x%x\n",
 639                        INT_34XX_PRCM_MPU_IRQ);
 640                 goto err1;
 641         }
 642
 643         ret = pwrdm_for_each(pwrdms_setup);
 644         if (ret) {
 645                 printk(KERN_ERR "Failed to setup powerdomains\n");
 646                 goto err2;
 647         }
 648
 649         (void) clkdm_for_each(clkdms_setup);
 650
 651         mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
 652         if (mpu_pwrdm == NULL) {
 653                 printk(KERN_ERR "Failed to get mpu_pwrdm\n");
 654                 goto err2;
 655         }
 656
 657         _omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend,
 658                                         omap34xx_cpu_suspend_sz);
 659
 660         suspend_set_ops(&omap_pm_ops);
 661
 662         pm_idle = omap3_pm_idle;
 663
 664 err1:
 665         return ret;
 666 err2:
 667         free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
 668         list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
 669                 list_del(&pwrst->node);
 670                 kfree(pwrst);
 671         }
 672         return ret;
 673 }
 674
 675 static void __init configure_vc(void)
 676 {
 677         prm_write_mod_reg((R_SRI2C_SLAVE_ADDR << OMAP3430_SMPS_SA1_SHIFT) |
 678                         (R_SRI2C_SLAVE_ADDR << OMAP3430_SMPS_SA0_SHIFT),
 679                         OMAP3430_GR_MOD, OMAP3_PRM_VC_SMPS_SA_OFFSET);
 680         prm_write_mod_reg((R_VDD2_SR_CONTROL << OMAP3430_VOLRA1_SHIFT) |
 681                         (R_VDD1_SR_CONTROL << OMAP3430_VOLRA0_SHIFT),
 682                         OMAP3430_GR_MOD, OMAP3_PRM_VC_SMPS_VOL_RA_OFFSET);
 683
 684         prm_write_mod_reg((OMAP3430_VC_CMD_VAL0_ON <<
 685                 OMAP3430_VC_CMD_ON_SHIFT) |
 686                 (OMAP3430_VC_CMD_VAL0_ONLP << OMAP3430_VC_CMD_ONLP_SHIFT) |
 687                 (OMAP3430_VC_CMD_VAL0_RET << OMAP3430_VC_CMD_RET_SHIFT) |
 688                 (OMAP3430_VC_CMD_VAL0_OFF << OMAP3430_VC_CMD_OFF_SHIFT),
 689                 OMAP3430_GR_MOD, OMAP3_PRM_VC_CMD_VAL_0_OFFSET);
 690
 691         prm_write_mod_reg((OMAP3430_VC_CMD_VAL1_ON <<
 692                 OMAP3430_VC_CMD_ON_SHIFT) |
 693                 (OMAP3430_VC_CMD_VAL1_ONLP << OMAP3430_VC_CMD_ONLP_SHIFT) |
 694                 (OMAP3430_VC_CMD_VAL1_RET << OMAP3430_VC_CMD_RET_SHIFT) |
 695                 (OMAP3430_VC_CMD_VAL1_OFF << OMAP3430_VC_CMD_OFF_SHIFT),
 696                 OMAP3430_GR_MOD, OMAP3_PRM_VC_CMD_VAL_1_OFFSET);
 697
 698         prm_write_mod_reg(OMAP3430_CMD1 | OMAP3430_RAV1,
 699                                 OMAP3430_GR_MOD,
 700                                 OMAP3_PRM_VC_CH_CONF_OFFSET);
 701
 702         prm_write_mod_reg(OMAP3430_MCODE_SHIFT | OMAP3430_HSEN | OMAP3430_SREN,
 703                                 OMAP3430_GR_MOD,
 704                                 OMAP3_PRM_VC_I2C_CFG_OFFSET);
 705
 706         /* Setup voltctrl and other setup times */
 707         prm_write_mod_reg(OMAP3430_AUTO_RET, OMAP3430_GR_MOD,
 708                         OMAP3_PRM_VOLTCTRL_OFFSET);
 709
 710         prm_write_mod_reg(OMAP3430_CLKSETUP_DURATION, OMAP3430_GR_MOD,
 711                         OMAP3_PRM_CLKSETUP_OFFSET);
 712         prm_write_mod_reg((OMAP3430_VOLTSETUP_TIME2 <<
 713                         OMAP3430_SETUP_TIME2_SHIFT) |
 714                         (OMAP3430_VOLTSETUP_TIME1 <<
 715                         OMAP3430_SETUP_TIME1_SHIFT),
 716                         OMAP3430_GR_MOD, OMAP3_PRM_VOLTSETUP1_OFFSET);
 717
 718         prm_write_mod_reg(OMAP3430_VOLTOFFSET_DURATION, OMAP3430_GR_MOD,
 719                         OMAP3_PRM_VOLTOFFSET_OFFSET);
 720         prm_write_mod_reg(OMAP3430_VOLTSETUP2_DURATION, OMAP3430_GR_MOD,
 721                         OMAP3_PRM_VOLTSETUP2_OFFSET);
 722 }
 723
 724 static int __init omap3_pm_early_init(void)
 725 {
 726         prm_clear_mod_reg_bits(OMAP3430_OFFMODE_POL, OMAP3430_GR_MOD,
 727                                 OMAP3_PRM_POLCTRL_OFFSET);
 728
 729         configure_vc();
 730
 731         return 0;
 732 }
 733
 734 arch_initcall(omap3_pm_early_init);