/* * linux/arch/arm/mach-omap1/pm.c * * OMAP Power Management Routines * * Original code for the SA11x0: * Copyright (c) 2001 Cliff Brake * * Modified for the PXA250 by Nicolas Pitre: * Copyright (c) 2002 Monta Vista Software, Inc. * * Modified for the OMAP1510 by David Singleton: * Copyright (c) 2002 Monta Vista Software, Inc. * * Cleanup 2004 for OMAP1510/1610 by Dirk Behme * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pm.h" static unsigned int arm_sleep_save[ARM_SLEEP_SAVE_SIZE]; static unsigned short dsp_sleep_save[DSP_SLEEP_SAVE_SIZE]; static unsigned short ulpd_sleep_save[ULPD_SLEEP_SAVE_SIZE]; static unsigned int mpui7xx_sleep_save[MPUI7XX_SLEEP_SAVE_SIZE]; static unsigned int mpui1510_sleep_save[MPUI1510_SLEEP_SAVE_SIZE]; static unsigned int mpui1610_sleep_save[MPUI1610_SLEEP_SAVE_SIZE]; #ifdef CONFIG_OMAP_32K_TIMER static unsigned short enable_dyn_sleep = 1; static ssize_t idle_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf) { return sprintf(buf, "%hu\n", enable_dyn_sleep); } static ssize_t idle_store(struct kobject *kobj, struct kobj_attribute *attr, const char * buf, size_t n) { unsigned short value; if (sscanf(buf, "%hu", &value) != 1 || (value != 0 && value != 1)) { printk(KERN_ERR "idle_sleep_store: Invalid value\n"); return -EINVAL; } enable_dyn_sleep = value; return n; } static struct kobj_attribute sleep_while_idle_attr = __ATTR(sleep_while_idle, 0644, idle_show, idle_store); #endif static void (*omap_sram_suspend)(unsigned long r0, unsigned long r1) = NULL; /* * Let's power down on idle, but only if we are really * idle, because once we start down the path of * going idle we continue to do idle even if we get * a clock tick interrupt . . */ void omap1_pm_idle(void) { extern __u32 arm_idlect1_mask; __u32 use_idlect1 = arm_idlect1_mask; int do_sleep = 0; local_irq_disable(); local_fiq_disable(); if (need_resched()) { local_fiq_enable(); local_irq_enable(); return; } #if defined(CONFIG_OMAP_MPU_TIMER) && !defined(CONFIG_OMAP_DM_TIMER) #warning Enable 32kHz OS timer in order to allow sleep states in idle use_idlect1 = use_idlect1 & ~(1 << 9); #else while (enable_dyn_sleep) { #ifdef CONFIG_CBUS_TAHVO_USB extern int vbus_active; /* Clock requirements? */ if (vbus_active) break; #endif do_sleep = 1; break; } #endif #ifdef CONFIG_OMAP_DM_TIMER use_idlect1 = omap_dm_timer_modify_idlect_mask(use_idlect1); #endif if (omap_dma_running()) use_idlect1 &= ~(1 << 6); /* We should be able to remove the do_sleep variable and multiple * tests above as soon as drivers, timer and DMA code have been fixed. * Even the sleep block count should become obsolete. */ if ((use_idlect1 != ~0) || !do_sleep) { __u32 saved_idlect1 = omap_readl(ARM_IDLECT1); if (cpu_is_omap15xx()) use_idlect1 &= OMAP1510_BIG_SLEEP_REQUEST; else use_idlect1 &= OMAP1610_IDLECT1_SLEEP_VAL; omap_writel(use_idlect1, ARM_IDLECT1); __asm__ volatile ("mcr p15, 0, r0, c7, c0, 4"); omap_writel(saved_idlect1, ARM_IDLECT1); local_fiq_enable(); local_irq_enable(); return; } omap_sram_suspend(omap_readl(ARM_IDLECT1), omap_readl(ARM_IDLECT2)); local_fiq_enable(); local_irq_enable(); } /* * Configuration of the wakeup event is board specific. For the * moment we put it into this helper function. Later it may move * to board specific files. */ static void omap_pm_wakeup_setup(void) { u32 level1_wake = 0; u32 level2_wake = OMAP_IRQ_BIT(INT_UART2); /* * Turn off all interrupts except GPIO bank 1, L1-2nd level cascade, * and the L2 wakeup interrupts: keypad and UART2. Note that the * drivers must still separately call omap_set_gpio_wakeup() to * wake up to a GPIO interrupt. */ if (cpu_is_omap7xx()) level1_wake = OMAP_IRQ_BIT(INT_7XX_GPIO_BANK1) | OMAP_IRQ_BIT(INT_7XX_IH2_IRQ); else if (cpu_is_omap15xx()) level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) | OMAP_IRQ_BIT(INT_1510_IH2_IRQ); else if (cpu_is_omap16xx()) level1_wake = OMAP_IRQ_BIT(INT_GPIO_BANK1) | OMAP_IRQ_BIT(INT_1610_IH2_IRQ); omap_writel(~level1_wake, OMAP_IH1_MIR); if (cpu_is_omap7xx()) { omap_writel(~level2_wake, OMAP_IH2_0_MIR); omap_writel(~(OMAP_IRQ_BIT(INT_7XX_WAKE_UP_REQ) | OMAP_IRQ_BIT(INT_7XX_MPUIO_KEYPAD)), OMAP_IH2_1_MIR); } else if (cpu_is_omap15xx()) { level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD); omap_writel(~level2_wake, OMAP_IH2_MIR); } else if (cpu_is_omap16xx()) { level2_wake |= OMAP_IRQ_BIT(INT_KEYBOARD); omap_writel(~level2_wake, OMAP_IH2_0_MIR); /* INT_1610_WAKE_UP_REQ is needed for GPIO wakeup... */ omap_writel(~OMAP_IRQ_BIT(INT_1610_WAKE_UP_REQ), OMAP_IH2_1_MIR); omap_writel(~0x0, OMAP_IH2_2_MIR); omap_writel(~0x0, OMAP_IH2_3_MIR); } /* New IRQ agreement, recalculate in cascade order */ omap_writel(1, OMAP_IH2_CONTROL); omap_writel(1, OMAP_IH1_CONTROL); } #define EN_DSPCK 13 /* ARM_CKCTL */ #define EN_APICK 6 /* ARM_IDLECT2 */ #define DSP_EN 1 /* ARM_RSTCT1 */ void omap1_pm_suspend(void) { unsigned long arg0 = 0, arg1 = 0; printk(KERN_INFO "PM: OMAP%x is trying to enter deep sleep...\n", omap_rev()); omap_serial_wake_trigger(1); if (!cpu_is_omap15xx()) omap_writew(0xffff, ULPD_SOFT_DISABLE_REQ_REG); /* * Step 1: turn off interrupts (FIXME: NOTE: already disabled) */ local_irq_disable(); local_fiq_disable(); /* * Step 2: save registers * * The omap is a strange/beautiful device. The caches, memory * and register state are preserved across power saves. * We have to save and restore very little register state to * idle the omap. * * Save interrupt, MPUI, ARM and UPLD control registers. */ if (cpu_is_omap7xx()) { MPUI7XX_SAVE(OMAP_IH1_MIR); MPUI7XX_SAVE(OMAP_IH2_0_MIR); MPUI7XX_SAVE(OMAP_IH2_1_MIR); MPUI7XX_SAVE(MPUI_CTRL); MPUI7XX_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI7XX_SAVE(MPUI_DSP_API_CONFIG); MPUI7XX_SAVE(EMIFS_CONFIG); MPUI7XX_SAVE(EMIFF_SDRAM_CONFIG); } else if (cpu_is_omap15xx()) { MPUI1510_SAVE(OMAP_IH1_MIR); MPUI1510_SAVE(OMAP_IH2_MIR); MPUI1510_SAVE(MPUI_CTRL); MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI1510_SAVE(MPUI_DSP_API_CONFIG); MPUI1510_SAVE(EMIFS_CONFIG); MPUI1510_SAVE(EMIFF_SDRAM_CONFIG); } else if (cpu_is_omap16xx()) { MPUI1610_SAVE(OMAP_IH1_MIR); MPUI1610_SAVE(OMAP_IH2_0_MIR); MPUI1610_SAVE(OMAP_IH2_1_MIR); MPUI1610_SAVE(OMAP_IH2_2_MIR); MPUI1610_SAVE(OMAP_IH2_3_MIR); MPUI1610_SAVE(MPUI_CTRL); MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI1610_SAVE(MPUI_DSP_API_CONFIG); MPUI1610_SAVE(EMIFS_CONFIG); MPUI1610_SAVE(EMIFF_SDRAM_CONFIG); } ARM_SAVE(ARM_CKCTL); ARM_SAVE(ARM_IDLECT1); ARM_SAVE(ARM_IDLECT2); if (!(cpu_is_omap15xx())) ARM_SAVE(ARM_IDLECT3); ARM_SAVE(ARM_EWUPCT); ARM_SAVE(ARM_RSTCT1); ARM_SAVE(ARM_RSTCT2); ARM_SAVE(ARM_SYSST); ULPD_SAVE(ULPD_CLOCK_CTRL); ULPD_SAVE(ULPD_STATUS_REQ); /* (Step 3 removed - we now allow deep sleep by default) */ /* * Step 4: OMAP DSP Shutdown */ /* stop DSP */ omap_writew(omap_readw(ARM_RSTCT1) & ~(1 << DSP_EN), ARM_RSTCT1); /* shut down dsp_ck */ if (!cpu_is_omap7xx()) omap_writew(omap_readw(ARM_CKCTL) & ~(1 << EN_DSPCK), ARM_CKCTL); /* temporarily enabling api_ck to access DSP registers */ omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2); /* save DSP registers */ DSP_SAVE(DSP_IDLECT2); /* Stop all DSP domain clocks */ __raw_writew(0, DSP_IDLECT2); /* * Step 5: Wakeup Event Setup */ omap_pm_wakeup_setup(); /* * Step 6: ARM and Traffic controller shutdown */ /* disable ARM watchdog */ omap_writel(0x00F5, OMAP_WDT_TIMER_MODE); omap_writel(0x00A0, OMAP_WDT_TIMER_MODE); /* * Step 6b: ARM and Traffic controller shutdown * * Step 6 continues here. Prepare jump to power management * assembly code in internal SRAM. * * Since the omap_cpu_suspend routine has been copied to * SRAM, we'll do an indirect procedure call to it and pass the * contents of arm_idlect1 and arm_idlect2 so it can restore * them when it wakes up and it will return. */ arg0 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT1]; arg1 = arm_sleep_save[ARM_SLEEP_SAVE_ARM_IDLECT2]; /* * Step 6c: ARM and Traffic controller shutdown * * Jump to assembly code. The processor will stay there * until wake up. */ omap_sram_suspend(arg0, arg1); /* * If we are here, processor is woken up! */ /* * Restore DSP clocks */ /* again temporarily enabling api_ck to access DSP registers */ omap_writew(omap_readw(ARM_IDLECT2) | 1 << EN_APICK, ARM_IDLECT2); /* Restore DSP domain clocks */ DSP_RESTORE(DSP_IDLECT2); /* * Restore ARM state, except ARM_IDLECT1/2 which omap_cpu_suspend did */ if (!(cpu_is_omap15xx())) ARM_RESTORE(ARM_IDLECT3); ARM_RESTORE(ARM_CKCTL); ARM_RESTORE(ARM_EWUPCT); ARM_RESTORE(ARM_RSTCT1); ARM_RESTORE(ARM_RSTCT2); ARM_RESTORE(ARM_SYSST); ULPD_RESTORE(ULPD_CLOCK_CTRL); ULPD_RESTORE(ULPD_STATUS_REQ); if (cpu_is_omap7xx()) { MPUI7XX_RESTORE(EMIFS_CONFIG); MPUI7XX_RESTORE(EMIFF_SDRAM_CONFIG); MPUI7XX_RESTORE(OMAP_IH1_MIR); MPUI7XX_RESTORE(OMAP_IH2_0_MIR); MPUI7XX_RESTORE(OMAP_IH2_1_MIR); } else if (cpu_is_omap15xx()) { MPUI1510_RESTORE(MPUI_CTRL); MPUI1510_RESTORE(MPUI_DSP_BOOT_CONFIG); MPUI1510_RESTORE(MPUI_DSP_API_CONFIG); MPUI1510_RESTORE(EMIFS_CONFIG); MPUI1510_RESTORE(EMIFF_SDRAM_CONFIG); MPUI1510_RESTORE(OMAP_IH1_MIR); MPUI1510_RESTORE(OMAP_IH2_MIR); } else if (cpu_is_omap16xx()) { MPUI1610_RESTORE(MPUI_CTRL); MPUI1610_RESTORE(MPUI_DSP_BOOT_CONFIG); MPUI1610_RESTORE(MPUI_DSP_API_CONFIG); MPUI1610_RESTORE(EMIFS_CONFIG); MPUI1610_RESTORE(EMIFF_SDRAM_CONFIG); MPUI1610_RESTORE(OMAP_IH1_MIR); MPUI1610_RESTORE(OMAP_IH2_0_MIR); MPUI1610_RESTORE(OMAP_IH2_1_MIR); MPUI1610_RESTORE(OMAP_IH2_2_MIR); MPUI1610_RESTORE(OMAP_IH2_3_MIR); } if (!cpu_is_omap15xx()) omap_writew(0, ULPD_SOFT_DISABLE_REQ_REG); /* * Re-enable interrupts */ local_irq_enable(); local_fiq_enable(); omap_serial_wake_trigger(0); printk(KERN_INFO "PM: OMAP%x is re-starting from deep sleep...\n", omap_rev()); } #if defined(DEBUG) && defined(CONFIG_PROC_FS) static int g_read_completed; /* * Read system PM registers for debugging */ static int omap_pm_read_proc( char *page_buffer, char **my_first_byte, off_t virtual_start, int length, int *eof, void *data) { int my_buffer_offset = 0; char * const my_base = page_buffer; ARM_SAVE(ARM_CKCTL); ARM_SAVE(ARM_IDLECT1); ARM_SAVE(ARM_IDLECT2); if (!(cpu_is_omap15xx())) ARM_SAVE(ARM_IDLECT3); ARM_SAVE(ARM_EWUPCT); ARM_SAVE(ARM_RSTCT1); ARM_SAVE(ARM_RSTCT2); ARM_SAVE(ARM_SYSST); ULPD_SAVE(ULPD_IT_STATUS); ULPD_SAVE(ULPD_CLOCK_CTRL); ULPD_SAVE(ULPD_SOFT_REQ); ULPD_SAVE(ULPD_STATUS_REQ); ULPD_SAVE(ULPD_DPLL_CTRL); ULPD_SAVE(ULPD_POWER_CTRL); if (cpu_is_omap7xx()) { MPUI7XX_SAVE(MPUI_CTRL); MPUI7XX_SAVE(MPUI_DSP_STATUS); MPUI7XX_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI7XX_SAVE(MPUI_DSP_API_CONFIG); MPUI7XX_SAVE(EMIFF_SDRAM_CONFIG); MPUI7XX_SAVE(EMIFS_CONFIG); } else if (cpu_is_omap15xx()) { MPUI1510_SAVE(MPUI_CTRL); MPUI1510_SAVE(MPUI_DSP_STATUS); MPUI1510_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI1510_SAVE(MPUI_DSP_API_CONFIG); MPUI1510_SAVE(EMIFF_SDRAM_CONFIG); MPUI1510_SAVE(EMIFS_CONFIG); } else if (cpu_is_omap16xx()) { MPUI1610_SAVE(MPUI_CTRL); MPUI1610_SAVE(MPUI_DSP_STATUS); MPUI1610_SAVE(MPUI_DSP_BOOT_CONFIG); MPUI1610_SAVE(MPUI_DSP_API_CONFIG); MPUI1610_SAVE(EMIFF_SDRAM_CONFIG); MPUI1610_SAVE(EMIFS_CONFIG); } if (virtual_start == 0) { g_read_completed = 0; my_buffer_offset += sprintf(my_base + my_buffer_offset, "ARM_CKCTL_REG: 0x%-8x \n" "ARM_IDLECT1_REG: 0x%-8x \n" "ARM_IDLECT2_REG: 0x%-8x \n" "ARM_IDLECT3_REG: 0x%-8x \n" "ARM_EWUPCT_REG: 0x%-8x \n" "ARM_RSTCT1_REG: 0x%-8x \n" "ARM_RSTCT2_REG: 0x%-8x \n" "ARM_SYSST_REG: 0x%-8x \n" "ULPD_IT_STATUS_REG: 0x%-4x \n" "ULPD_CLOCK_CTRL_REG: 0x%-4x \n" "ULPD_SOFT_REQ_REG: 0x%-4x \n" "ULPD_DPLL_CTRL_REG: 0x%-4x \n" "ULPD_STATUS_REQ_REG: 0x%-4x \n" "ULPD_POWER_CTRL_REG: 0x%-4x \n", ARM_SHOW(ARM_CKCTL), ARM_SHOW(ARM_IDLECT1), ARM_SHOW(ARM_IDLECT2), ARM_SHOW(ARM_IDLECT3), ARM_SHOW(ARM_EWUPCT), ARM_SHOW(ARM_RSTCT1), ARM_SHOW(ARM_RSTCT2), ARM_SHOW(ARM_SYSST), ULPD_SHOW(ULPD_IT_STATUS), ULPD_SHOW(ULPD_CLOCK_CTRL), ULPD_SHOW(ULPD_SOFT_REQ), ULPD_SHOW(ULPD_DPLL_CTRL), ULPD_SHOW(ULPD_STATUS_REQ), ULPD_SHOW(ULPD_POWER_CTRL)); if (cpu_is_omap7xx()) { my_buffer_offset += sprintf(my_base + my_buffer_offset, "MPUI7XX_CTRL_REG 0x%-8x \n" "MPUI7XX_DSP_STATUS_REG: 0x%-8x \n" "MPUI7XX_DSP_BOOT_CONFIG_REG: 0x%-8x \n" "MPUI7XX_DSP_API_CONFIG_REG: 0x%-8x \n" "MPUI7XX_SDRAM_CONFIG_REG: 0x%-8x \n" "MPUI7XX_EMIFS_CONFIG_REG: 0x%-8x \n", MPUI7XX_SHOW(MPUI_CTRL), MPUI7XX_SHOW(MPUI_DSP_STATUS), MPUI7XX_SHOW(MPUI_DSP_BOOT_CONFIG), MPUI7XX_SHOW(MPUI_DSP_API_CONFIG), MPUI7XX_SHOW(EMIFF_SDRAM_CONFIG), MPUI7XX_SHOW(EMIFS_CONFIG)); } else if (cpu_is_omap15xx()) { my_buffer_offset += sprintf(my_base + my_buffer_offset, "MPUI1510_CTRL_REG 0x%-8x \n" "MPUI1510_DSP_STATUS_REG: 0x%-8x \n" "MPUI1510_DSP_BOOT_CONFIG_REG: 0x%-8x \n" "MPUI1510_DSP_API_CONFIG_REG: 0x%-8x \n" "MPUI1510_SDRAM_CONFIG_REG: 0x%-8x \n" "MPUI1510_EMIFS_CONFIG_REG: 0x%-8x \n", MPUI1510_SHOW(MPUI_CTRL), MPUI1510_SHOW(MPUI_DSP_STATUS), MPUI1510_SHOW(MPUI_DSP_BOOT_CONFIG), MPUI1510_SHOW(MPUI_DSP_API_CONFIG), MPUI1510_SHOW(EMIFF_SDRAM_CONFIG), MPUI1510_SHOW(EMIFS_CONFIG)); } else if (cpu_is_omap16xx()) { my_buffer_offset += sprintf(my_base + my_buffer_offset, "MPUI1610_CTRL_REG 0x%-8x \n" "MPUI1610_DSP_STATUS_REG: 0x%-8x \n" "MPUI1610_DSP_BOOT_CONFIG_REG: 0x%-8x \n" "MPUI1610_DSP_API_CONFIG_REG: 0x%-8x \n" "MPUI1610_SDRAM_CONFIG_REG: 0x%-8x \n" "MPUI1610_EMIFS_CONFIG_REG: 0x%-8x \n", MPUI1610_SHOW(MPUI_CTRL), MPUI1610_SHOW(MPUI_DSP_STATUS), MPUI1610_SHOW(MPUI_DSP_BOOT_CONFIG), MPUI1610_SHOW(MPUI_DSP_API_CONFIG), MPUI1610_SHOW(EMIFF_SDRAM_CONFIG), MPUI1610_SHOW(EMIFS_CONFIG)); } g_read_completed++; } else if (g_read_completed >= 1) { *eof = 1; return 0; } g_read_completed++; *my_first_byte = page_buffer; return my_buffer_offset; } static void omap_pm_init_proc(void) { struct proc_dir_entry *entry; entry = create_proc_read_entry("driver/omap_pm", S_IWUSR | S_IRUGO, NULL, omap_pm_read_proc, NULL); } #endif /* DEBUG && CONFIG_PROC_FS */ static void (*saved_idle)(void) = NULL; static void omap1_dummy_idle(void) { } /* * omap_pm_prepare - Do preliminary suspend work. * */ static int omap_pm_prepare(void) { /* We cannot sleep in idle until we have resumed */ saved_idle = pm_idle; pm_idle = omap1_dummy_idle; return 0; } /* * omap_pm_enter - Actually enter a sleep state. * @state: State we're entering. * */ static int omap_pm_enter(suspend_state_t state) { switch (state) { case PM_SUSPEND_STANDBY: case PM_SUSPEND_MEM: omap1_pm_suspend(); break; default: return -EINVAL; } return 0; } /** * omap_pm_finish - Finish up suspend sequence. * * This is called after we wake back up (or if entering the sleep state * failed). */ static void omap_pm_finish(void) { pm_idle = saved_idle; } static irqreturn_t omap_wakeup_interrupt(int irq, void *dev) { return IRQ_HANDLED; } static struct irqaction omap_wakeup_irq = { .name = "peripheral wakeup", .flags = IRQF_DISABLED, .handler = omap_wakeup_interrupt }; static const struct platform_suspend_ops omap_pm_ops = { .prepare = omap_pm_prepare, .enter = omap_pm_enter, .finish = omap_pm_finish, .valid = suspend_valid_only_mem, }; static int __init omap_pm_init(void) { #ifdef CONFIG_OMAP_32K_TIMER int error; #endif if (!cpu_class_is_omap1()) return -ENODEV; printk("Power Management for TI OMAP.\n"); /* * We copy the assembler sleep/wakeup routines to SRAM. * These routines need to be in SRAM as that's the only * memory the MPU can see when it wakes up. */ if (cpu_is_omap7xx()) { omap_sram_suspend = omap_sram_push(omap7xx_cpu_suspend, omap7xx_cpu_suspend_sz); } else if (cpu_is_omap15xx()) { omap_sram_suspend = omap_sram_push(omap1510_cpu_suspend, omap1510_cpu_suspend_sz); } else if (cpu_is_omap16xx()) { omap_sram_suspend = omap_sram_push(omap1610_cpu_suspend, omap1610_cpu_suspend_sz); } if (omap_sram_suspend == NULL) { printk(KERN_ERR "PM not initialized: Missing SRAM support\n"); return -ENODEV; } pm_idle = omap1_pm_idle; if (cpu_is_omap7xx()) setup_irq(INT_7XX_WAKE_UP_REQ, &omap_wakeup_irq); else if (cpu_is_omap16xx()) setup_irq(INT_1610_WAKE_UP_REQ, &omap_wakeup_irq); /* Program new power ramp-up time * (0 for most boards since we don't lower voltage when in deep sleep) */ omap_writew(ULPD_SETUP_ANALOG_CELL_3_VAL, ULPD_SETUP_ANALOG_CELL_3); /* Setup ULPD POWER_CTRL_REG - enter deep sleep whenever possible */ omap_writew(ULPD_POWER_CTRL_REG_VAL, ULPD_POWER_CTRL); /* Configure IDLECT3 */ if (cpu_is_omap7xx()) omap_writel(OMAP7XX_IDLECT3_VAL, OMAP7XX_IDLECT3); else if (cpu_is_omap16xx()) omap_writel(OMAP1610_IDLECT3_VAL, OMAP1610_IDLECT3); suspend_set_ops(&omap_pm_ops); #if defined(DEBUG) && defined(CONFIG_PROC_FS) omap_pm_init_proc(); #endif #ifdef CONFIG_OMAP_32K_TIMER error = sysfs_create_file(power_kobj, &sleep_while_idle_attr.attr); if (error) printk(KERN_ERR "sysfs_create_file failed: %d\n", error); #endif if (cpu_is_omap16xx()) { /* configure LOW_PWR pin */ omap_cfg_reg(T20_1610_LOW_PWR); } return 0; } __initcall(omap_pm_init);