git.oblomov.eu Git - linux-2.6/blob - arch/arm/mach-omap2/pm34xx.c

   1 /*
   2  * OMAP3 Power Management Routines
   3  *
   4  * Copyright (C) 2006-2008 Nokia Corporation
   5  * Tony Lindgren <tony@atomide.com>
   6  * Jouni Hogander
   7  *
   8  * Copyright (C) 2005 Texas Instruments, Inc.
   9  * Richard Woodruff <r-woodruff2@ti.com>
  10  *
  11  * Based on pm.c for omap1
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  */
  17
  18 #include <linux/pm.h>
  19 #include <linux/suspend.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/module.h>
  22 #include <linux/list.h>
  23 #include <linux/err.h>
  24 #include <linux/gpio.h>
  25
  26 #include <mach/sram.h>
  27 #include <mach/clockdomain.h>
  28 #include <mach/powerdomain.h>
  29 #include <mach/control.h>
  30 #include <mach/serial.h>
  31
  32 #include "cm.h"
  33 #include "cm-regbits-34xx.h"
  34 #include "prm-regbits-34xx.h"
  35
  36 #include "prm.h"
  37 #include "pm.h"
  38
  39 struct power_state {
  40         struct powerdomain *pwrdm;
  41         u32 next_state;
  42         u32 saved_state;
  43         struct list_head node;
  44 };
  45
  46 static LIST_HEAD(pwrst_list);
  47
  48 static void (*_omap_sram_idle)(u32 *addr, int save_state);
  49
  50 static struct powerdomain *mpu_pwrdm;
  51
  52 /* PRCM Interrupt Handler for wakeups */
  53 static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
  54 {
  55         u32 wkst, irqstatus_mpu;
  56         u32 fclk, iclk;
  57
  58         /* WKUP */
  59         wkst = prm_read_mod_reg(WKUP_MOD, PM_WKST);
  60         if (wkst) {
  61                 iclk = cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
  62                 fclk = cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
  63                 cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_ICLKEN);
  64                 cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_FCLKEN);
  65                 prm_write_mod_reg(wkst, WKUP_MOD, PM_WKST);
  66                 while (prm_read_mod_reg(WKUP_MOD, PM_WKST))
  67                         cpu_relax();
  68                 cm_write_mod_reg(iclk, WKUP_MOD, CM_ICLKEN);
  69                 cm_write_mod_reg(fclk, WKUP_MOD, CM_FCLKEN);
  70         }
  71
  72         /* CORE */
  73         wkst = prm_read_mod_reg(CORE_MOD, PM_WKST1);
  74         if (wkst) {
  75                 iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
  76                 fclk = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
  77                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN1);
  78                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_FCLKEN1);
  79                 prm_write_mod_reg(wkst, CORE_MOD, PM_WKST1);
  80                 while (prm_read_mod_reg(CORE_MOD, PM_WKST1))
  81                         cpu_relax();
  82                 cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN1);
  83                 cm_write_mod_reg(fclk, CORE_MOD, CM_FCLKEN1);
  84         }
  85         wkst = prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3);
  86         if (wkst) {
  87                 iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
  88                 fclk = cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  89                 cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN3);
  90                 cm_set_mod_reg_bits(wkst, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  91                 prm_write_mod_reg(wkst, CORE_MOD, OMAP3430ES2_PM_WKST3);
  92                 while (prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3))
  93                         cpu_relax();
  94                 cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN3);
  95                 cm_write_mod_reg(fclk, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
  96         }
  97
  98         /* PER */
  99         wkst = prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST);
 100         if (wkst) {
 101                 iclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
 102                 fclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
 103                 cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_ICLKEN);
 104                 cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_FCLKEN);
 105                 prm_write_mod_reg(wkst, OMAP3430_PER_MOD, PM_WKST);
 106                 while (prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST))
 107                         cpu_relax();
 108                 cm_write_mod_reg(iclk, OMAP3430_PER_MOD, CM_ICLKEN);
 109                 cm_write_mod_reg(fclk, OMAP3430_PER_MOD, CM_FCLKEN);
 110         }
 111
 112         if (omap_rev() > OMAP3430_REV_ES1_0) {
 113                 /* USBHOST */
 114                 wkst = prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, PM_WKST);
 115                 if (wkst) {
 116                         iclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 117                                                CM_ICLKEN);
 118                         fclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 119                                                CM_FCLKEN);
 120                         cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
 121                                             CM_ICLKEN);
 122                         cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
 123                                             CM_FCLKEN);
 124                         prm_write_mod_reg(wkst, OMAP3430ES2_USBHOST_MOD,
 125                                           PM_WKST);
 126                         while (prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 127                                                 PM_WKST))
 128                                 cpu_relax();
 129                         cm_write_mod_reg(iclk, OMAP3430ES2_USBHOST_MOD,
 130                                          CM_ICLKEN);
 131                         cm_write_mod_reg(fclk, OMAP3430ES2_USBHOST_MOD,
 132                                          CM_FCLKEN);
 133                 }
 134         }
 135
 136         irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
 137                                          OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
 138         prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
 139                           OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
 140
 141         while (prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET))
 142                 cpu_relax();
 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         omap2_gpio_prepare_for_retention();
 172         omap_uart_prepare_idle(0);
 173         omap_uart_prepare_idle(1);
 174         omap_uart_prepare_idle(2);
 175
 176         _omap_sram_idle(NULL, save_state);
 177         cpu_init();
 178
 179         omap_uart_resume_idle(2);
 180         omap_uart_resume_idle(1);
 181         omap_uart_resume_idle(0);
 182         omap2_gpio_resume_after_retention();
 183 }
 184
 185 /*
 186  * Check if functional clocks are enabled before entering
 187  * sleep. This function could be behind CONFIG_PM_DEBUG
 188  * when all drivers are configuring their sysconfig registers
 189  * properly and using their clocks properly.
 190  */
 191 static int omap3_fclks_active(void)
 192 {
 193         u32 fck_core1 = 0, fck_core3 = 0, fck_sgx = 0, fck_dss = 0,
 194                 fck_cam = 0, fck_per = 0, fck_usbhost = 0;
 195
 196         fck_core1 = cm_read_mod_reg(CORE_MOD,
 197                                     CM_FCLKEN1);
 198         if (omap_rev() > OMAP3430_REV_ES1_0) {
 199                 fck_core3 = cm_read_mod_reg(CORE_MOD,
 200                                             OMAP3430ES2_CM_FCLKEN3);
 201                 fck_sgx = cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
 202                                           CM_FCLKEN);
 203                 fck_usbhost = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
 204                                               CM_FCLKEN);
 205         } else
 206                 fck_sgx = cm_read_mod_reg(GFX_MOD,
 207                                           OMAP3430ES2_CM_FCLKEN3);
 208         fck_dss = cm_read_mod_reg(OMAP3430_DSS_MOD,
 209                                   CM_FCLKEN);
 210         fck_cam = cm_read_mod_reg(OMAP3430_CAM_MOD,
 211                                   CM_FCLKEN);
 212         fck_per = cm_read_mod_reg(OMAP3430_PER_MOD,
 213                                   CM_FCLKEN);
 214
 215         /* Ignore UART clocks.  These are handled by UART core (serial.c) */
 216         fck_core1 &= ~(OMAP3430_EN_UART1 | OMAP3430_EN_UART2);
 217         fck_per &= ~OMAP3430_EN_UART3;
 218
 219         if (fck_core1 | fck_core3 | fck_sgx | fck_dss |
 220             fck_cam | fck_per | fck_usbhost)
 221                 return 1;
 222         return 0;
 223 }
 224
 225 static int omap3_can_sleep(void)
 226 {
 227         if (!omap_uart_can_sleep())
 228                 return 0;
 229         if (omap3_fclks_active())
 230                 return 0;
 231         return 1;
 232 }
 233
 234 /* This sets pwrdm state (other than mpu & core. Currently only ON &
 235  * RET are supported. Function is assuming that clkdm doesn't have
 236  * hw_sup mode enabled. */
 237 static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
 238 {
 239         u32 cur_state;
 240         int sleep_switch = 0;
 241         int ret = 0;
 242
 243         if (pwrdm == NULL || IS_ERR(pwrdm))
 244                 return -EINVAL;
 245
 246         while (!(pwrdm->pwrsts & (1 << state))) {
 247                 if (state == PWRDM_POWER_OFF)
 248                         return ret;
 249                 state--;
 250         }
 251
 252         cur_state = pwrdm_read_next_pwrst(pwrdm);
 253         if (cur_state == state)
 254                 return ret;
 255
 256         if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
 257                 omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
 258                 sleep_switch = 1;
 259                 pwrdm_wait_transition(pwrdm);
 260         }
 261
 262         ret = pwrdm_set_next_pwrst(pwrdm, state);
 263         if (ret) {
 264                 printk(KERN_ERR "Unable to set state of powerdomain: %s\n",
 265                        pwrdm->name);
 266                 goto err;
 267         }
 268
 269         if (sleep_switch) {
 270                 omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
 271                 pwrdm_wait_transition(pwrdm);
 272         }
 273
 274 err:
 275         return ret;
 276 }
 277
 278 static void omap3_pm_idle(void)
 279 {
 280         local_irq_disable();
 281         local_fiq_disable();
 282
 283         if (!omap3_can_sleep())
 284                 goto out;
 285
 286         if (omap_irq_pending())
 287                 goto out;
 288
 289         omap_sram_idle();
 290
 291 out:
 292         local_fiq_enable();
 293         local_irq_enable();
 294 }
 295
 296 static int omap3_pm_prepare(void)
 297 {
 298         disable_hlt();
 299         return 0;
 300 }
 301
 302 static int omap3_pm_suspend(void)
 303 {
 304         struct power_state *pwrst;
 305         int state, ret = 0;
 306
 307         /* Read current next_pwrsts */
 308         list_for_each_entry(pwrst, &pwrst_list, node)
 309                 pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
 310         /* Set ones wanted by suspend */
 311         list_for_each_entry(pwrst, &pwrst_list, node) {
 312                 if (set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))
 313                         goto restore;
 314                 if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))
 315                         goto restore;
 316         }
 317
 318         omap_uart_prepare_suspend();
 319         omap_sram_idle();
 320
 321 restore:
 322         /* Restore next_pwrsts */
 323         list_for_each_entry(pwrst, &pwrst_list, node) {
 324                 set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
 325                 state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
 326                 if (state > pwrst->next_state) {
 327                         printk(KERN_INFO "Powerdomain (%s) didn't enter "
 328                                "target state %d\n",
 329                                pwrst->pwrdm->name, pwrst->next_state);
 330                         ret = -1;
 331                 }
 332         }
 333         if (ret)
 334                 printk(KERN_ERR "Could not enter target state in pm_suspend\n");
 335         else
 336                 printk(KERN_INFO "Successfully put all powerdomains "
 337                        "to target state\n");
 338
 339         return ret;
 340 }
 341
 342 static int omap3_pm_enter(suspend_state_t state)
 343 {
 344         int ret = 0;
 345
 346         switch (state) {
 347         case PM_SUSPEND_STANDBY:
 348         case PM_SUSPEND_MEM:
 349                 ret = omap3_pm_suspend();
 350                 break;
 351         default:
 352                 ret = -EINVAL;
 353         }
 354
 355         return ret;
 356 }
 357
 358 static void omap3_pm_finish(void)
 359 {
 360         enable_hlt();
 361 }
 362
 363 static struct platform_suspend_ops omap_pm_ops = {
 364         .prepare        = omap3_pm_prepare,
 365         .enter          = omap3_pm_enter,
 366         .finish         = omap3_pm_finish,
 367         .valid          = suspend_valid_only_mem,
 368 };
 369
 370
 371 /**
 372  * omap3_iva_idle(): ensure IVA is in idle so it can be put into
 373  *                   retention
 374  *
 375  * In cases where IVA2 is activated by bootcode, it may prevent
 376  * full-chip retention or off-mode because it is not idle.  This
 377  * function forces the IVA2 into idle state so it can go
 378  * into retention/off and thus allow full-chip retention/off.
 379  *
 380  **/
 381 static void __init omap3_iva_idle(void)
 382 {
 383         /* ensure IVA2 clock is disabled */
 384         cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
 385
 386         /* if no clock activity, nothing else to do */
 387         if (!(cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
 388               OMAP3430_CLKACTIVITY_IVA2_MASK))
 389                 return;
 390
 391         /* Reset IVA2 */
 392         prm_write_mod_reg(OMAP3430_RST1_IVA2 |
 393                           OMAP3430_RST2_IVA2 |
 394                           OMAP3430_RST3_IVA2,
 395                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 396
 397         /* Enable IVA2 clock */
 398         cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2,
 399                          OMAP3430_IVA2_MOD, CM_FCLKEN);
 400
 401         /* Set IVA2 boot mode to 'idle' */
 402         omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
 403                          OMAP343X_CONTROL_IVA2_BOOTMOD);
 404
 405         /* Un-reset IVA2 */
 406         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, RM_RSTCTRL);
 407
 408         /* Disable IVA2 clock */
 409         cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
 410
 411         /* Reset IVA2 */
 412         prm_write_mod_reg(OMAP3430_RST1_IVA2 |
 413                           OMAP3430_RST2_IVA2 |
 414                           OMAP3430_RST3_IVA2,
 415                           OMAP3430_IVA2_MOD, RM_RSTCTRL);
 416 }
 417
 418 static void __init prcm_setup_regs(void)
 419 {
 420         /* reset modem */
 421         prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
 422                           OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
 423                           CORE_MOD, RM_RSTCTRL);
 424         prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
 425
 426         /* XXX Reset all wkdeps. This should be done when initializing
 427          * powerdomains */
 428         prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
 429         prm_write_mod_reg(0, MPU_MOD, PM_WKDEP);
 430         prm_write_mod_reg(0, OMAP3430_DSS_MOD, PM_WKDEP);
 431         prm_write_mod_reg(0, OMAP3430_NEON_MOD, PM_WKDEP);
 432         prm_write_mod_reg(0, OMAP3430_CAM_MOD, PM_WKDEP);
 433         prm_write_mod_reg(0, OMAP3430_PER_MOD, PM_WKDEP);
 434         if (omap_rev() > OMAP3430_REV_ES1_0) {
 435                 prm_write_mod_reg(0, OMAP3430ES2_SGX_MOD, PM_WKDEP);
 436                 prm_write_mod_reg(0, OMAP3430ES2_USBHOST_MOD, PM_WKDEP);
 437         } else
 438                 prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
 439
 440         /*
 441          * Enable interface clock autoidle for all modules.
 442          * Note that in the long run this should be done by clockfw
 443          */
 444         cm_write_mod_reg(
 445                 OMAP3430ES2_AUTO_MMC3 |
 446                 OMAP3430ES2_AUTO_ICR |
 447                 OMAP3430_AUTO_AES2 |
 448                 OMAP3430_AUTO_SHA12 |
 449                 OMAP3430_AUTO_DES2 |
 450                 OMAP3430_AUTO_MMC2 |
 451                 OMAP3430_AUTO_MMC1 |
 452                 OMAP3430_AUTO_MSPRO |
 453                 OMAP3430_AUTO_HDQ |
 454                 OMAP3430_AUTO_MCSPI4 |
 455                 OMAP3430_AUTO_MCSPI3 |
 456                 OMAP3430_AUTO_MCSPI2 |
 457                 OMAP3430_AUTO_MCSPI1 |
 458                 OMAP3430_AUTO_I2C3 |
 459                 OMAP3430_AUTO_I2C2 |
 460                 OMAP3430_AUTO_I2C1 |
 461                 OMAP3430_AUTO_UART2 |
 462                 OMAP3430_AUTO_UART1 |
 463                 OMAP3430_AUTO_GPT11 |
 464                 OMAP3430_AUTO_GPT10 |
 465                 OMAP3430_AUTO_MCBSP5 |
 466                 OMAP3430_AUTO_MCBSP1 |
 467                 OMAP3430ES1_AUTO_FAC | /* This is es1 only */
 468                 OMAP3430_AUTO_MAILBOXES |
 469                 OMAP3430_AUTO_OMAPCTRL |
 470                 OMAP3430ES1_AUTO_FSHOSTUSB |
 471                 OMAP3430_AUTO_HSOTGUSB |
 472                 OMAP3430ES1_AUTO_D2D | /* This is es1 only */
 473                 OMAP3430_AUTO_SSI,
 474                 CORE_MOD, CM_AUTOIDLE1);
 475
 476         cm_write_mod_reg(
 477                 OMAP3430_AUTO_PKA |
 478                 OMAP3430_AUTO_AES1 |
 479                 OMAP3430_AUTO_RNG |
 480                 OMAP3430_AUTO_SHA11 |
 481                 OMAP3430_AUTO_DES1,
 482                 CORE_MOD, CM_AUTOIDLE2);
 483
 484         if (omap_rev() > OMAP3430_REV_ES1_0) {
 485                 cm_write_mod_reg(
 486                         OMAP3430ES2_AUTO_USBTLL,
 487                         CORE_MOD, CM_AUTOIDLE3);
 488         }
 489
 490         cm_write_mod_reg(
 491                 OMAP3430_AUTO_WDT2 |
 492                 OMAP3430_AUTO_WDT1 |
 493                 OMAP3430_AUTO_GPIO1 |
 494                 OMAP3430_AUTO_32KSYNC |
 495                 OMAP3430_AUTO_GPT12 |
 496                 OMAP3430_AUTO_GPT1 ,
 497                 WKUP_MOD, CM_AUTOIDLE);
 498
 499         cm_write_mod_reg(
 500                 OMAP3430_AUTO_DSS,
 501                 OMAP3430_DSS_MOD,
 502                 CM_AUTOIDLE);
 503
 504         cm_write_mod_reg(
 505                 OMAP3430_AUTO_CAM,
 506                 OMAP3430_CAM_MOD,
 507                 CM_AUTOIDLE);
 508
 509         cm_write_mod_reg(
 510                 OMAP3430_AUTO_GPIO6 |
 511                 OMAP3430_AUTO_GPIO5 |
 512                 OMAP3430_AUTO_GPIO4 |
 513                 OMAP3430_AUTO_GPIO3 |
 514                 OMAP3430_AUTO_GPIO2 |
 515                 OMAP3430_AUTO_WDT3 |
 516                 OMAP3430_AUTO_UART3 |
 517                 OMAP3430_AUTO_GPT9 |
 518                 OMAP3430_AUTO_GPT8 |
 519                 OMAP3430_AUTO_GPT7 |
 520                 OMAP3430_AUTO_GPT6 |
 521                 OMAP3430_AUTO_GPT5 |
 522                 OMAP3430_AUTO_GPT4 |
 523                 OMAP3430_AUTO_GPT3 |
 524                 OMAP3430_AUTO_GPT2 |
 525                 OMAP3430_AUTO_MCBSP4 |
 526                 OMAP3430_AUTO_MCBSP3 |
 527                 OMAP3430_AUTO_MCBSP2,
 528                 OMAP3430_PER_MOD,
 529                 CM_AUTOIDLE);
 530
 531         if (omap_rev() > OMAP3430_REV_ES1_0) {
 532                 cm_write_mod_reg(
 533                         OMAP3430ES2_AUTO_USBHOST,
 534                         OMAP3430ES2_USBHOST_MOD,
 535                         CM_AUTOIDLE);
 536         }
 537
 538         /*
 539          * Set all plls to autoidle. This is needed until autoidle is
 540          * enabled by clockfw
 541          */
 542         cm_write_mod_reg(1 << OMAP3430_AUTO_IVA2_DPLL_SHIFT,
 543                          OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
 544         cm_write_mod_reg(1 << OMAP3430_AUTO_MPU_DPLL_SHIFT,
 545                          MPU_MOD,
 546                          CM_AUTOIDLE2);
 547         cm_write_mod_reg((1 << OMAP3430_AUTO_PERIPH_DPLL_SHIFT) |
 548                          (1 << OMAP3430_AUTO_CORE_DPLL_SHIFT),
 549                          PLL_MOD,
 550                          CM_AUTOIDLE);
 551         cm_write_mod_reg(1 << OMAP3430ES2_AUTO_PERIPH2_DPLL_SHIFT,
 552                          PLL_MOD,
 553                          CM_AUTOIDLE2);
 554
 555         /*
 556          * Enable control of expternal oscillator through
 557          * sys_clkreq. In the long run clock framework should
 558          * take care of this.
 559          */
 560         prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
 561                              1 << OMAP_AUTOEXTCLKMODE_SHIFT,
 562                              OMAP3430_GR_MOD,
 563                              OMAP3_PRM_CLKSRC_CTRL_OFFSET);
 564
 565         /* setup wakup source */
 566         prm_write_mod_reg(OMAP3430_EN_IO | OMAP3430_EN_GPIO1 |
 567                           OMAP3430_EN_GPT1 | OMAP3430_EN_GPT12,
 568                           WKUP_MOD, PM_WKEN);
 569         /* No need to write EN_IO, that is always enabled */
 570         prm_write_mod_reg(OMAP3430_EN_GPIO1 | OMAP3430_EN_GPT1 |
 571                           OMAP3430_EN_GPT12,
 572                           WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
 573         /* For some reason IO doesn't generate wakeup event even if
 574          * it is selected to mpu wakeup goup */
 575         prm_write_mod_reg(OMAP3430_IO_EN | OMAP3430_WKUP_EN,
 576                           OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
 577
 578         omap3_iva_idle();
 579 }
 580
 581 static int __init pwrdms_setup(struct powerdomain *pwrdm)
 582 {
 583         struct power_state *pwrst;
 584
 585         if (!pwrdm->pwrsts)
 586                 return 0;
 587
 588         pwrst = kmalloc(sizeof(struct power_state), GFP_KERNEL);
 589         if (!pwrst)
 590                 return -ENOMEM;
 591         pwrst->pwrdm = pwrdm;
 592         pwrst->next_state = PWRDM_POWER_RET;
 593         list_add(&pwrst->node, &pwrst_list);
 594
 595         if (pwrdm_has_hdwr_sar(pwrdm))
 596                 pwrdm_enable_hdwr_sar(pwrdm);
 597
 598         return set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
 599 }
 600
 601 /*
 602  * Enable hw supervised mode for all clockdomains if it's
 603  * supported. Initiate sleep transition for other clockdomains, if
 604  * they are not used
 605  */
 606 static int __init clkdms_setup(struct clockdomain *clkdm)
 607 {
 608         if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO)
 609                 omap2_clkdm_allow_idle(clkdm);
 610         else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP &&
 611                  atomic_read(&clkdm->usecount) == 0)
 612                 omap2_clkdm_sleep(clkdm);
 613         return 0;
 614 }
 615
 616 int __init omap3_pm_init(void)
 617 {
 618         struct power_state *pwrst, *tmp;
 619         int ret;
 620
 621         if (!cpu_is_omap34xx())
 622                 return -ENODEV;
 623
 624         printk(KERN_ERR "Power Management for TI OMAP3.\n");
 625
 626         /* XXX prcm_setup_regs needs to be before enabling hw
 627          * supervised mode for powerdomains */
 628         prcm_setup_regs();
 629
 630         ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
 631                           (irq_handler_t)prcm_interrupt_handler,
 632                           IRQF_DISABLED, "prcm", NULL);
 633         if (ret) {
 634                 printk(KERN_ERR "request_irq failed to register for 0x%x\n",
 635                        INT_34XX_PRCM_MPU_IRQ);
 636                 goto err1;
 637         }
 638
 639         ret = pwrdm_for_each(pwrdms_setup);
 640         if (ret) {
 641                 printk(KERN_ERR "Failed to setup powerdomains\n");
 642                 goto err2;
 643         }
 644
 645         (void) clkdm_for_each(clkdms_setup);
 646
 647         mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
 648         if (mpu_pwrdm == NULL) {
 649                 printk(KERN_ERR "Failed to get mpu_pwrdm\n");
 650                 goto err2;
 651         }
 652
 653         _omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend,
 654                                          omap34xx_cpu_suspend_sz);
 655
 656         suspend_set_ops(&omap_pm_ops);
 657
 658         pm_idle = omap3_pm_idle;
 659
 660 err1:
 661         return ret;
 662 err2:
 663         free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
 664         list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
 665                 list_del(&pwrst->node);
 666                 kfree(pwrst);
 667         }
 668         return ret;
 669 }
 670
 671 late_initcall(omap3_pm_init);