2 * OMAP3 Power Management Routines
4 * Copyright (C) 2006-2008 Nokia Corporation
5 * Tony Lindgren <tony@atomide.com>
8 * Copyright (C) 2007 Texas Instruments, Inc.
9 * Rajendra Nayak <rnayak@ti.com>
11 * Copyright (C) 2005 Texas Instruments, Inc.
12 * Richard Woodruff <r-woodruff2@ti.com>
14 * Based on pm.c for omap1
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License version 2 as
18 * published by the Free Software Foundation.
22 #include <linux/suspend.h>
23 #include <linux/interrupt.h>
24 #include <linux/module.h>
25 #include <linux/list.h>
26 #include <linux/err.h>
27 #include <linux/gpio.h>
28 #include <linux/clk.h>
29 #include <linux/delay.h>
30 #include <linux/slab.h>
31 #include <linux/console.h>
32 #include <trace/events/power.h>
34 #include <plat/sram.h>
35 #include "clockdomain.h"
36 #include "powerdomain.h"
37 #include <plat/serial.h>
38 #include <plat/sdrc.h>
39 #include <plat/prcm.h>
40 #include <plat/gpmc.h>
43 #include "cm2xxx_3xxx.h"
44 #include "cm-regbits-34xx.h"
45 #include "prm-regbits-34xx.h"
47 #include "prm2xxx_3xxx.h"
53 static suspend_state_t suspend_state = PM_SUSPEND_ON;
54 static inline bool is_suspending(void)
56 return (suspend_state != PM_SUSPEND_ON);
59 static inline bool is_suspending(void)
65 /* pm34xx errata defined in pm.h */
69 struct powerdomain *pwrdm;
74 struct list_head node;
77 static LIST_HEAD(pwrst_list);
79 static void (*_omap_sram_idle)(u32 *addr, int save_state);
81 static int (*_omap_save_secure_sram)(u32 *addr);
83 static struct powerdomain *mpu_pwrdm, *neon_pwrdm;
84 static struct powerdomain *core_pwrdm, *per_pwrdm;
85 static struct powerdomain *cam_pwrdm;
87 static inline void omap3_per_save_context(void)
89 omap_gpio_save_context();
92 static inline void omap3_per_restore_context(void)
94 omap_gpio_restore_context();
97 static void omap3_enable_io_chain(void)
101 if (omap_rev() >= OMAP3430_REV_ES3_1) {
102 omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD,
104 /* Do a readback to assure write has been done */
105 omap2_prm_read_mod_reg(WKUP_MOD, PM_WKEN);
107 while (!(omap2_prm_read_mod_reg(WKUP_MOD, PM_WKEN) &
108 OMAP3430_ST_IO_CHAIN_MASK)) {
110 if (timeout > 1000) {
111 printk(KERN_ERR "Wake up daisy chain "
112 "activation failed.\n");
115 omap2_prm_set_mod_reg_bits(OMAP3430_ST_IO_CHAIN_MASK,
121 static void omap3_disable_io_chain(void)
123 if (omap_rev() >= OMAP3430_REV_ES3_1)
124 omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_CHAIN_MASK, WKUP_MOD,
128 static void omap3_core_save_context(void)
130 omap3_ctrl_save_padconf();
133 * Force write last pad into memory, as this can fail in some
134 * cases according to errata 1.157, 1.185
136 omap_ctrl_writel(omap_ctrl_readl(OMAP343X_PADCONF_ETK_D14),
137 OMAP343X_CONTROL_MEM_WKUP + 0x2a0);
139 /* Save the Interrupt controller context */
140 omap_intc_save_context();
141 /* Save the GPMC context */
142 omap3_gpmc_save_context();
143 /* Save the system control module context, padconf already save above*/
144 omap3_control_save_context();
145 omap_dma_global_context_save();
148 static void omap3_core_restore_context(void)
150 /* Restore the control module context, padconf restored by h/w */
151 omap3_control_restore_context();
152 /* Restore the GPMC context */
153 omap3_gpmc_restore_context();
154 /* Restore the interrupt controller context */
155 omap_intc_restore_context();
156 omap_dma_global_context_restore();
160 * FIXME: This function should be called before entering off-mode after
161 * OMAP3 secure services have been accessed. Currently it is only called
162 * once during boot sequence, but this works as we are not using secure
165 static void omap3_save_secure_ram_context(void)
168 int mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
170 if (omap_type() != OMAP2_DEVICE_TYPE_GP) {
172 * MPU next state must be set to POWER_ON temporarily,
173 * otherwise the WFI executed inside the ROM code
174 * will hang the system.
176 pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_ON);
177 ret = _omap_save_secure_sram((u32 *)
178 __pa(omap3_secure_ram_storage));
179 pwrdm_set_next_pwrst(mpu_pwrdm, mpu_next_state);
180 /* Following is for error tracking, it should not happen */
182 printk(KERN_ERR "save_secure_sram() returns %08x\n",
191 * PRCM Interrupt Handler Helper Function
193 * The purpose of this function is to clear any wake-up events latched
194 * in the PRCM PM_WKST_x registers. It is possible that a wake-up event
195 * may occur whilst attempting to clear a PM_WKST_x register and thus
196 * set another bit in this register. A while loop is used to ensure
197 * that any peripheral wake-up events occurring while attempting to
198 * clear the PM_WKST_x are detected and cleared.
200 static int prcm_clear_mod_irqs(s16 module, u8 regs)
202 u32 wkst, fclk, iclk, clken;
203 u16 wkst_off = (regs == 3) ? OMAP3430ES2_PM_WKST3 : PM_WKST1;
204 u16 fclk_off = (regs == 3) ? OMAP3430ES2_CM_FCLKEN3 : CM_FCLKEN1;
205 u16 iclk_off = (regs == 3) ? CM_ICLKEN3 : CM_ICLKEN1;
206 u16 grpsel_off = (regs == 3) ?
207 OMAP3430ES2_PM_MPUGRPSEL3 : OMAP3430_PM_MPUGRPSEL;
210 wkst = omap2_prm_read_mod_reg(module, wkst_off);
211 wkst &= omap2_prm_read_mod_reg(module, grpsel_off);
213 iclk = omap2_cm_read_mod_reg(module, iclk_off);
214 fclk = omap2_cm_read_mod_reg(module, fclk_off);
217 omap2_cm_set_mod_reg_bits(clken, module, iclk_off);
219 * For USBHOST, we don't know whether HOST1 or
220 * HOST2 woke us up, so enable both f-clocks
222 if (module == OMAP3430ES2_USBHOST_MOD)
223 clken |= 1 << OMAP3430ES2_EN_USBHOST2_SHIFT;
224 omap2_cm_set_mod_reg_bits(clken, module, fclk_off);
225 omap2_prm_write_mod_reg(wkst, module, wkst_off);
226 wkst = omap2_prm_read_mod_reg(module, wkst_off);
229 omap2_cm_write_mod_reg(iclk, module, iclk_off);
230 omap2_cm_write_mod_reg(fclk, module, fclk_off);
236 static int _prcm_int_handle_wakeup(void)
240 c = prcm_clear_mod_irqs(WKUP_MOD, 1);
241 c += prcm_clear_mod_irqs(CORE_MOD, 1);
242 c += prcm_clear_mod_irqs(OMAP3430_PER_MOD, 1);
243 if (omap_rev() > OMAP3430_REV_ES1_0) {
244 c += prcm_clear_mod_irqs(CORE_MOD, 3);
245 c += prcm_clear_mod_irqs(OMAP3430ES2_USBHOST_MOD, 1);
252 * PRCM Interrupt Handler
254 * The PRM_IRQSTATUS_MPU register indicates if there are any pending
255 * interrupts from the PRCM for the MPU. These bits must be cleared in
256 * order to clear the PRCM interrupt. The PRCM interrupt handler is
257 * implemented to simply clear the PRM_IRQSTATUS_MPU in order to clear
258 * the PRCM interrupt. Please note that bit 0 of the PRM_IRQSTATUS_MPU
259 * register indicates that a wake-up event is pending for the MPU and
260 * this bit can only be cleared if the all the wake-up events latched
261 * in the various PM_WKST_x registers have been cleared. The interrupt
262 * handler is implemented using a do-while loop so that if a wake-up
263 * event occurred during the processing of the prcm interrupt handler
264 * (setting a bit in the corresponding PM_WKST_x register and thus
265 * preventing us from clearing bit 0 of the PRM_IRQSTATUS_MPU register)
266 * this would be handled.
268 static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
270 u32 irqenable_mpu, irqstatus_mpu;
273 irqenable_mpu = omap2_prm_read_mod_reg(OCP_MOD,
274 OMAP3_PRM_IRQENABLE_MPU_OFFSET);
275 irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,
276 OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
277 irqstatus_mpu &= irqenable_mpu;
280 if (irqstatus_mpu & (OMAP3430_WKUP_ST_MASK |
281 OMAP3430_IO_ST_MASK)) {
282 c = _prcm_int_handle_wakeup();
285 * Is the MPU PRCM interrupt handler racing with the
286 * IVA2 PRCM interrupt handler ?
288 WARN(c == 0, "prcm: WARNING: PRCM indicated MPU wakeup "
289 "but no wakeup sources are marked\n");
291 /* XXX we need to expand our PRCM interrupt handler */
292 WARN(1, "prcm: WARNING: PRCM interrupt received, but "
293 "no code to handle it (%08x)\n", irqstatus_mpu);
296 omap2_prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
297 OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
299 irqstatus_mpu = omap2_prm_read_mod_reg(OCP_MOD,
300 OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
301 irqstatus_mpu &= irqenable_mpu;
303 } while (irqstatus_mpu);
308 static void omap34xx_do_sram_idle(unsigned long save_state)
310 _omap_sram_idle(omap3_arm_context, save_state);
313 void omap_sram_idle(void)
315 /* Variable to tell what needs to be saved and restored
316 * in omap_sram_idle*/
317 /* save_state = 0 => Nothing to save and restored */
318 /* save_state = 1 => Only L1 and logic lost */
319 /* save_state = 2 => Only L2 lost */
320 /* save_state = 3 => L1, L2 and logic lost */
322 int mpu_next_state = PWRDM_POWER_ON;
323 int per_next_state = PWRDM_POWER_ON;
324 int core_next_state = PWRDM_POWER_ON;
326 int core_prev_state, per_prev_state;
329 if (!_omap_sram_idle)
332 pwrdm_clear_all_prev_pwrst(mpu_pwrdm);
333 pwrdm_clear_all_prev_pwrst(neon_pwrdm);
334 pwrdm_clear_all_prev_pwrst(core_pwrdm);
335 pwrdm_clear_all_prev_pwrst(per_pwrdm);
337 mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
338 switch (mpu_next_state) {
340 case PWRDM_POWER_RET:
341 /* No need to save context */
344 case PWRDM_POWER_OFF:
349 printk(KERN_ERR "Invalid mpu state in sram_idle\n");
352 pwrdm_pre_transition();
355 if (pwrdm_read_pwrst(neon_pwrdm) == PWRDM_POWER_ON)
356 pwrdm_set_next_pwrst(neon_pwrdm, mpu_next_state);
358 /* Enable IO-PAD and IO-CHAIN wakeups */
359 per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
360 core_next_state = pwrdm_read_next_pwrst(core_pwrdm);
361 if (omap3_has_io_wakeup() &&
362 (per_next_state < PWRDM_POWER_ON ||
363 core_next_state < PWRDM_POWER_ON)) {
364 omap2_prm_set_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD, PM_WKEN);
365 omap3_enable_io_chain();
368 /* Block console output in case it is on one of the OMAP UARTs */
369 if (!is_suspending())
370 if (per_next_state < PWRDM_POWER_ON ||
371 core_next_state < PWRDM_POWER_ON)
372 if (!console_trylock())
373 goto console_still_active;
376 if (per_next_state < PWRDM_POWER_ON) {
377 per_going_off = (per_next_state == PWRDM_POWER_OFF) ? 1 : 0;
378 omap_uart_prepare_idle(2);
379 omap_uart_prepare_idle(3);
380 omap2_gpio_prepare_for_idle(per_going_off);
381 if (per_next_state == PWRDM_POWER_OFF)
382 omap3_per_save_context();
386 if (core_next_state < PWRDM_POWER_ON) {
387 omap_uart_prepare_idle(0);
388 omap_uart_prepare_idle(1);
389 if (core_next_state == PWRDM_POWER_OFF) {
390 omap3_core_save_context();
391 omap3_cm_save_context();
395 omap3_intc_prepare_idle();
398 * On EMU/HS devices ROM code restores a SRDC value
399 * from scratchpad which has automatic self refresh on timeout
400 * of AUTO_CNT = 1 enabled. This takes care of erratum ID i443.
401 * Hence store/restore the SDRC_POWER register here.
403 if (omap_rev() >= OMAP3430_REV_ES3_0 &&
404 omap_type() != OMAP2_DEVICE_TYPE_GP &&
405 core_next_state == PWRDM_POWER_OFF)
406 sdrc_pwr = sdrc_read_reg(SDRC_POWER);
409 * omap3_arm_context is the location where some ARM context
410 * get saved. The rest is placed on the stack, and restored
411 * from there before resuming.
413 if (save_state == 1 || save_state == 3)
414 cpu_suspend(0, PHYS_OFFSET - PAGE_OFFSET, save_state,
415 omap34xx_do_sram_idle);
417 omap34xx_do_sram_idle(save_state);
419 /* Restore normal SDRC POWER settings */
420 if (omap_rev() >= OMAP3430_REV_ES3_0 &&
421 omap_type() != OMAP2_DEVICE_TYPE_GP &&
422 core_next_state == PWRDM_POWER_OFF)
423 sdrc_write_reg(sdrc_pwr, SDRC_POWER);
426 if (core_next_state < PWRDM_POWER_ON) {
427 core_prev_state = pwrdm_read_prev_pwrst(core_pwrdm);
428 if (core_prev_state == PWRDM_POWER_OFF) {
429 omap3_core_restore_context();
430 omap3_cm_restore_context();
431 omap3_sram_restore_context();
432 omap2_sms_restore_context();
434 omap_uart_resume_idle(0);
435 omap_uart_resume_idle(1);
436 if (core_next_state == PWRDM_POWER_OFF)
437 omap2_prm_clear_mod_reg_bits(OMAP3430_AUTO_OFF_MASK,
439 OMAP3_PRM_VOLTCTRL_OFFSET);
441 omap3_intc_resume_idle();
444 if (per_next_state < PWRDM_POWER_ON) {
445 per_prev_state = pwrdm_read_prev_pwrst(per_pwrdm);
446 omap2_gpio_resume_after_idle();
447 if (per_prev_state == PWRDM_POWER_OFF)
448 omap3_per_restore_context();
449 omap_uart_resume_idle(2);
450 omap_uart_resume_idle(3);
453 if (!is_suspending())
456 console_still_active:
457 /* Disable IO-PAD and IO-CHAIN wakeup */
458 if (omap3_has_io_wakeup() &&
459 (per_next_state < PWRDM_POWER_ON ||
460 core_next_state < PWRDM_POWER_ON)) {
461 omap2_prm_clear_mod_reg_bits(OMAP3430_EN_IO_MASK, WKUP_MOD,
463 omap3_disable_io_chain();
466 pwrdm_post_transition();
468 clkdm_allow_idle(mpu_pwrdm->pwrdm_clkdms[0]);
471 int omap3_can_sleep(void)
473 if (!sleep_while_idle)
475 if (!omap_uart_can_sleep())
480 static void omap3_pm_idle(void)
485 if (!omap3_can_sleep())
488 if (omap_irq_pending() || need_resched())
491 trace_power_start(POWER_CSTATE, 1, smp_processor_id());
492 trace_cpu_idle(1, smp_processor_id());
496 trace_power_end(smp_processor_id());
497 trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
504 #ifdef CONFIG_SUSPEND
505 static int omap3_pm_suspend(void)
507 struct power_state *pwrst;
510 if (wakeup_timer_seconds || wakeup_timer_milliseconds)
511 omap2_pm_wakeup_on_timer(wakeup_timer_seconds,
512 wakeup_timer_milliseconds);
514 /* Read current next_pwrsts */
515 list_for_each_entry(pwrst, &pwrst_list, node)
516 pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
517 /* Set ones wanted by suspend */
518 list_for_each_entry(pwrst, &pwrst_list, node) {
519 if (omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))
521 if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))
525 omap_uart_prepare_suspend();
526 omap3_intc_suspend();
531 /* Restore next_pwrsts */
532 list_for_each_entry(pwrst, &pwrst_list, node) {
533 state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
534 if (state > pwrst->next_state) {
535 printk(KERN_INFO "Powerdomain (%s) didn't enter "
537 pwrst->pwrdm->name, pwrst->next_state);
540 omap_set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
543 printk(KERN_ERR "Could not enter target state in pm_suspend\n");
545 printk(KERN_INFO "Successfully put all powerdomains "
546 "to target state\n");
551 static int omap3_pm_enter(suspend_state_t unused)
555 switch (suspend_state) {
556 case PM_SUSPEND_STANDBY:
558 ret = omap3_pm_suspend();
567 /* Hooks to enable / disable UART interrupts during suspend */
568 static int omap3_pm_begin(suspend_state_t state)
571 suspend_state = state;
572 omap_uart_enable_irqs(0);
576 static void omap3_pm_end(void)
578 suspend_state = PM_SUSPEND_ON;
579 omap_uart_enable_irqs(1);
584 static const struct platform_suspend_ops omap_pm_ops = {
585 .begin = omap3_pm_begin,
587 .enter = omap3_pm_enter,
588 .valid = suspend_valid_only_mem,
590 #endif /* CONFIG_SUSPEND */
594 * omap3_iva_idle(): ensure IVA is in idle so it can be put into
597 * In cases where IVA2 is activated by bootcode, it may prevent
598 * full-chip retention or off-mode because it is not idle. This
599 * function forces the IVA2 into idle state so it can go
600 * into retention/off and thus allow full-chip retention/off.
603 static void __init omap3_iva_idle(void)
605 /* ensure IVA2 clock is disabled */
606 omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
608 /* if no clock activity, nothing else to do */
609 if (!(omap2_cm_read_mod_reg(OMAP3430_IVA2_MOD, OMAP3430_CM_CLKSTST) &
610 OMAP3430_CLKACTIVITY_IVA2_MASK))
614 omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
615 OMAP3430_RST2_IVA2_MASK |
616 OMAP3430_RST3_IVA2_MASK,
617 OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
619 /* Enable IVA2 clock */
620 omap2_cm_write_mod_reg(OMAP3430_CM_FCLKEN_IVA2_EN_IVA2_MASK,
621 OMAP3430_IVA2_MOD, CM_FCLKEN);
623 /* Set IVA2 boot mode to 'idle' */
624 omap_ctrl_writel(OMAP3_IVA2_BOOTMOD_IDLE,
625 OMAP343X_CONTROL_IVA2_BOOTMOD);
628 omap2_prm_write_mod_reg(0, OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
630 /* Disable IVA2 clock */
631 omap2_cm_write_mod_reg(0, OMAP3430_IVA2_MOD, CM_FCLKEN);
634 omap2_prm_write_mod_reg(OMAP3430_RST1_IVA2_MASK |
635 OMAP3430_RST2_IVA2_MASK |
636 OMAP3430_RST3_IVA2_MASK,
637 OMAP3430_IVA2_MOD, OMAP2_RM_RSTCTRL);
640 static void __init omap3_d2d_idle(void)
644 /* In a stand alone OMAP3430 where there is not a stacked
645 * modem for the D2D Idle Ack and D2D MStandby must be pulled
646 * high. S CONTROL_PADCONF_SAD2D_IDLEACK and
647 * CONTROL_PADCONF_SAD2D_MSTDBY to have a pull up. */
648 mask = (1 << 4) | (1 << 3); /* pull-up, enabled */
649 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_MSTANDBY);
651 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_MSTANDBY);
653 padconf = omap_ctrl_readw(OMAP3_PADCONF_SAD2D_IDLEACK);
655 omap_ctrl_writew(padconf, OMAP3_PADCONF_SAD2D_IDLEACK);
658 omap2_prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON_MASK |
659 OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST_MASK,
660 CORE_MOD, OMAP2_RM_RSTCTRL);
661 omap2_prm_write_mod_reg(0, CORE_MOD, OMAP2_RM_RSTCTRL);
664 static void __init prcm_setup_regs(void)
666 u32 omap3630_en_uart4_mask = cpu_is_omap3630() ?
667 OMAP3630_EN_UART4_MASK : 0;
668 u32 omap3630_grpsel_uart4_mask = cpu_is_omap3630() ?
669 OMAP3630_GRPSEL_UART4_MASK : 0;
671 /* XXX This should be handled by hwmod code or SCM init code */
672 omap_ctrl_writel(OMAP3430_AUTOIDLE_MASK, OMAP2_CONTROL_SYSCONFIG);
675 * Enable control of expternal oscillator through
676 * sys_clkreq. In the long run clock framework should
679 omap2_prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
680 1 << OMAP_AUTOEXTCLKMODE_SHIFT,
682 OMAP3_PRM_CLKSRC_CTRL_OFFSET);
684 /* setup wakup source */
685 omap2_prm_write_mod_reg(OMAP3430_EN_IO_MASK | OMAP3430_EN_GPIO1_MASK |
686 OMAP3430_EN_GPT1_MASK | OMAP3430_EN_GPT12_MASK,
688 /* No need to write EN_IO, that is always enabled */
689 omap2_prm_write_mod_reg(OMAP3430_GRPSEL_GPIO1_MASK |
690 OMAP3430_GRPSEL_GPT1_MASK |
691 OMAP3430_GRPSEL_GPT12_MASK,
692 WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
693 /* For some reason IO doesn't generate wakeup event even if
694 * it is selected to mpu wakeup goup */
695 omap2_prm_write_mod_reg(OMAP3430_IO_EN_MASK | OMAP3430_WKUP_EN_MASK,
696 OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
698 /* Enable PM_WKEN to support DSS LPR */
699 omap2_prm_write_mod_reg(OMAP3430_PM_WKEN_DSS_EN_DSS_MASK,
700 OMAP3430_DSS_MOD, PM_WKEN);
702 /* Enable wakeups in PER */
703 omap2_prm_write_mod_reg(omap3630_en_uart4_mask |
704 OMAP3430_EN_GPIO2_MASK | OMAP3430_EN_GPIO3_MASK |
705 OMAP3430_EN_GPIO4_MASK | OMAP3430_EN_GPIO5_MASK |
706 OMAP3430_EN_GPIO6_MASK | OMAP3430_EN_UART3_MASK |
707 OMAP3430_EN_MCBSP2_MASK | OMAP3430_EN_MCBSP3_MASK |
708 OMAP3430_EN_MCBSP4_MASK,
709 OMAP3430_PER_MOD, PM_WKEN);
710 /* and allow them to wake up MPU */
711 omap2_prm_write_mod_reg(omap3630_grpsel_uart4_mask |
712 OMAP3430_GRPSEL_GPIO2_MASK |
713 OMAP3430_GRPSEL_GPIO3_MASK |
714 OMAP3430_GRPSEL_GPIO4_MASK |
715 OMAP3430_GRPSEL_GPIO5_MASK |
716 OMAP3430_GRPSEL_GPIO6_MASK |
717 OMAP3430_GRPSEL_UART3_MASK |
718 OMAP3430_GRPSEL_MCBSP2_MASK |
719 OMAP3430_GRPSEL_MCBSP3_MASK |
720 OMAP3430_GRPSEL_MCBSP4_MASK,
721 OMAP3430_PER_MOD, OMAP3430_PM_MPUGRPSEL);
723 /* Don't attach IVA interrupts */
724 omap2_prm_write_mod_reg(0, WKUP_MOD, OMAP3430_PM_IVAGRPSEL);
725 omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430_PM_IVAGRPSEL1);
726 omap2_prm_write_mod_reg(0, CORE_MOD, OMAP3430ES2_PM_IVAGRPSEL3);
727 omap2_prm_write_mod_reg(0, OMAP3430_PER_MOD, OMAP3430_PM_IVAGRPSEL);
729 /* Clear any pending 'reset' flags */
730 omap2_prm_write_mod_reg(0xffffffff, MPU_MOD, OMAP2_RM_RSTST);
731 omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP2_RM_RSTST);
732 omap2_prm_write_mod_reg(0xffffffff, OMAP3430_PER_MOD, OMAP2_RM_RSTST);
733 omap2_prm_write_mod_reg(0xffffffff, OMAP3430_EMU_MOD, OMAP2_RM_RSTST);
734 omap2_prm_write_mod_reg(0xffffffff, OMAP3430_NEON_MOD, OMAP2_RM_RSTST);
735 omap2_prm_write_mod_reg(0xffffffff, OMAP3430_DSS_MOD, OMAP2_RM_RSTST);
736 omap2_prm_write_mod_reg(0xffffffff, OMAP3430ES2_USBHOST_MOD, OMAP2_RM_RSTST);
738 /* Clear any pending PRCM interrupts */
739 omap2_prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
745 void omap3_pm_off_mode_enable(int enable)
747 struct power_state *pwrst;
751 state = PWRDM_POWER_OFF;
753 state = PWRDM_POWER_RET;
755 list_for_each_entry(pwrst, &pwrst_list, node) {
756 if (IS_PM34XX_ERRATUM(PM_SDRC_WAKEUP_ERRATUM_i583) &&
757 pwrst->pwrdm == core_pwrdm &&
758 state == PWRDM_POWER_OFF) {
759 pwrst->next_state = PWRDM_POWER_RET;
760 pr_warn("%s: Core OFF disabled due to errata i583\n",
763 pwrst->next_state = state;
765 omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
769 int omap3_pm_get_suspend_state(struct powerdomain *pwrdm)
771 struct power_state *pwrst;
773 list_for_each_entry(pwrst, &pwrst_list, node) {
774 if (pwrst->pwrdm == pwrdm)
775 return pwrst->next_state;
780 int omap3_pm_set_suspend_state(struct powerdomain *pwrdm, int state)
782 struct power_state *pwrst;
784 list_for_each_entry(pwrst, &pwrst_list, node) {
785 if (pwrst->pwrdm == pwrdm) {
786 pwrst->next_state = state;
793 static int __init pwrdms_setup(struct powerdomain *pwrdm, void *unused)
795 struct power_state *pwrst;
800 pwrst = kmalloc(sizeof(struct power_state), GFP_ATOMIC);
803 pwrst->pwrdm = pwrdm;
804 pwrst->next_state = PWRDM_POWER_RET;
805 list_add(&pwrst->node, &pwrst_list);
807 if (pwrdm_has_hdwr_sar(pwrdm))
808 pwrdm_enable_hdwr_sar(pwrdm);
810 return omap_set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
814 * Enable hw supervised mode for all clockdomains if it's
815 * supported. Initiate sleep transition for other clockdomains, if
818 static int __init clkdms_setup(struct clockdomain *clkdm, void *unused)
820 if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO)
821 clkdm_allow_idle(clkdm);
822 else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP &&
823 atomic_read(&clkdm->usecount) == 0)
828 void omap_push_sram_idle(void)
830 _omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend,
831 omap34xx_cpu_suspend_sz);
832 if (omap_type() != OMAP2_DEVICE_TYPE_GP)
833 _omap_save_secure_sram = omap_sram_push(save_secure_ram_context,
834 save_secure_ram_context_sz);
837 static void __init pm_errata_configure(void)
839 if (cpu_is_omap3630()) {
840 pm34xx_errata |= PM_RTA_ERRATUM_i608;
841 /* Enable the l2 cache toggling in sleep logic */
842 enable_omap3630_toggle_l2_on_restore();
843 if (omap_rev() < OMAP3630_REV_ES1_2)
844 pm34xx_errata |= PM_SDRC_WAKEUP_ERRATUM_i583;
848 static int __init omap3_pm_init(void)
850 struct power_state *pwrst, *tmp;
851 struct clockdomain *neon_clkdm, *per_clkdm, *mpu_clkdm, *core_clkdm;
854 if (!cpu_is_omap34xx())
857 pm_errata_configure();
859 /* XXX prcm_setup_regs needs to be before enabling hw
860 * supervised mode for powerdomains */
863 ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
864 (irq_handler_t)prcm_interrupt_handler,
865 IRQF_DISABLED, "prcm", NULL);
867 printk(KERN_ERR "request_irq failed to register for 0x%x\n",
868 INT_34XX_PRCM_MPU_IRQ);
872 ret = pwrdm_for_each(pwrdms_setup, NULL);
874 printk(KERN_ERR "Failed to setup powerdomains\n");
878 (void) clkdm_for_each(clkdms_setup, NULL);
880 mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
881 if (mpu_pwrdm == NULL) {
882 printk(KERN_ERR "Failed to get mpu_pwrdm\n");
886 neon_pwrdm = pwrdm_lookup("neon_pwrdm");
887 per_pwrdm = pwrdm_lookup("per_pwrdm");
888 core_pwrdm = pwrdm_lookup("core_pwrdm");
889 cam_pwrdm = pwrdm_lookup("cam_pwrdm");
891 neon_clkdm = clkdm_lookup("neon_clkdm");
892 mpu_clkdm = clkdm_lookup("mpu_clkdm");
893 per_clkdm = clkdm_lookup("per_clkdm");
894 core_clkdm = clkdm_lookup("core_clkdm");
896 omap_push_sram_idle();
897 #ifdef CONFIG_SUSPEND
898 suspend_set_ops(&omap_pm_ops);
899 #endif /* CONFIG_SUSPEND */
901 pm_idle = omap3_pm_idle;
905 * RTA is disabled during initialization as per erratum i608
906 * it is safer to disable RTA by the bootloader, but we would like
907 * to be doubly sure here and prevent any mishaps.
909 if (IS_PM34XX_ERRATUM(PM_RTA_ERRATUM_i608))
910 omap3630_ctrl_disable_rta();
912 clkdm_add_wkdep(neon_clkdm, mpu_clkdm);
913 if (omap_type() != OMAP2_DEVICE_TYPE_GP) {
914 omap3_secure_ram_storage =
915 kmalloc(0x803F, GFP_KERNEL);
916 if (!omap3_secure_ram_storage)
917 printk(KERN_ERR "Memory allocation failed when"
918 "allocating for secure sram context\n");
923 omap_dma_global_context_save();
924 omap3_save_secure_ram_context();
925 omap_dma_global_context_restore();
931 omap3_save_scratchpad_contents();
935 free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
936 list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
937 list_del(&pwrst->node);
943 late_initcall(omap3_pm_init);