diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/arm/mach-omap2/pm24xx.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/arm/mach-omap2/pm24xx.c | 389 |
1 files changed, 0 insertions, 389 deletions
diff --git a/ANDROID_3.4.5/arch/arm/mach-omap2/pm24xx.c b/ANDROID_3.4.5/arch/arm/mach-omap2/pm24xx.c deleted file mode 100644 index 95442b69..00000000 --- a/ANDROID_3.4.5/arch/arm/mach-omap2/pm24xx.c +++ /dev/null @@ -1,389 +0,0 @@ -/* - * OMAP2 Power Management Routines - * - * Copyright (C) 2005 Texas Instruments, Inc. - * Copyright (C) 2006-2008 Nokia Corporation - * - * Written by: - * Richard Woodruff <r-woodruff2@ti.com> - * Tony Lindgren - * Juha Yrjola - * Amit Kucheria <amit.kucheria@nokia.com> - * Igor Stoppa <igor.stoppa@nokia.com> - * - * Based on pm.c for omap1 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/suspend.h> -#include <linux/sched.h> -#include <linux/proc_fs.h> -#include <linux/interrupt.h> -#include <linux/sysfs.h> -#include <linux/module.h> -#include <linux/delay.h> -#include <linux/clk.h> -#include <linux/irq.h> -#include <linux/time.h> -#include <linux/gpio.h> - -#include <asm/mach/time.h> -#include <asm/mach/irq.h> -#include <asm/mach-types.h> -#include <asm/system_misc.h> - -#include <plat/clock.h> -#include <plat/sram.h> -#include <plat/dma.h> -#include <plat/board.h> - -#include <mach/irqs.h> - -#include "common.h" -#include "prm2xxx_3xxx.h" -#include "prm-regbits-24xx.h" -#include "cm2xxx_3xxx.h" -#include "cm-regbits-24xx.h" -#include "sdrc.h" -#include "pm.h" -#include "control.h" -#include "powerdomain.h" -#include "clockdomain.h" - -static void (*omap2_sram_idle)(void); -static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl, - void __iomem *sdrc_power); - -static struct powerdomain *mpu_pwrdm, *core_pwrdm; -static struct clockdomain *dsp_clkdm, *mpu_clkdm, *wkup_clkdm, *gfx_clkdm; - -static struct clk *osc_ck, *emul_ck; - -static int omap2_fclks_active(void) -{ - u32 f1, f2; - - f1 = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); - f2 = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); - - return (f1 | f2) ? 1 : 0; -} - -static int omap2_enter_full_retention(void) -{ - u32 l; - - /* There is 1 reference hold for all children of the oscillator - * clock, the following will remove it. If no one else uses the - * oscillator itself it will be disabled if/when we enter retention - * mode. - */ - clk_disable(osc_ck); - - /* Clear old wake-up events */ - /* REVISIT: These write to reserved bits? */ - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); - omap2_prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); - - /* - * Set MPU powerdomain's next power state to RETENTION; - * preserve logic state during retention - */ - pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); - pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); - - /* Workaround to kill USB */ - l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL; - omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0); - - omap2_gpio_prepare_for_idle(0); - - /* One last check for pending IRQs to avoid extra latency due - * to sleeping unnecessarily. */ - if (omap_irq_pending()) - goto no_sleep; - - /* Jump to SRAM suspend code */ - omap2_sram_suspend(sdrc_read_reg(SDRC_DLLA_CTRL), - OMAP_SDRC_REGADDR(SDRC_DLLA_CTRL), - OMAP_SDRC_REGADDR(SDRC_POWER)); - -no_sleep: - omap2_gpio_resume_after_idle(); - - clk_enable(osc_ck); - - /* clear CORE wake-up events */ - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); - - /* wakeup domain events - bit 1: GPT1, bit5 GPIO */ - omap2_prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST); - - /* MPU domain wake events */ - l = omap2_prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); - if (l & 0x01) - omap2_prm_write_mod_reg(0x01, OCP_MOD, - OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); - if (l & 0x20) - omap2_prm_write_mod_reg(0x20, OCP_MOD, - OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); - - /* Mask future PRCM-to-MPU interrupts */ - omap2_prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET); - - return 0; -} - -static int omap2_i2c_active(void) -{ - u32 l; - - l = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); - return l & (OMAP2420_EN_I2C2_MASK | OMAP2420_EN_I2C1_MASK); -} - -static int sti_console_enabled; - -static int omap2_allow_mpu_retention(void) -{ - u32 l; - - /* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */ - l = omap2_cm_read_mod_reg(CORE_MOD, CM_FCLKEN1); - if (l & (OMAP2420_EN_MMC_MASK | OMAP24XX_EN_UART2_MASK | - OMAP24XX_EN_UART1_MASK | OMAP24XX_EN_MCSPI2_MASK | - OMAP24XX_EN_MCSPI1_MASK | OMAP24XX_EN_DSS1_MASK)) - return 0; - /* Check for UART3. */ - l = omap2_cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2); - if (l & OMAP24XX_EN_UART3_MASK) - return 0; - if (sti_console_enabled) - return 0; - - return 1; -} - -static void omap2_enter_mpu_retention(void) -{ - int only_idle = 0; - - /* Putting MPU into the WFI state while a transfer is active - * seems to cause the I2C block to timeout. Why? Good question. */ - if (omap2_i2c_active()) - return; - - /* The peripherals seem not to be able to wake up the MPU when - * it is in retention mode. */ - if (omap2_allow_mpu_retention()) { - /* REVISIT: These write to reserved bits? */ - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1); - omap2_prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2); - omap2_prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST); - - /* Try to enter MPU retention */ - omap2_prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) | - OMAP_LOGICRETSTATE_MASK, - MPU_MOD, OMAP2_PM_PWSTCTRL); - } else { - /* Block MPU retention */ - - omap2_prm_write_mod_reg(OMAP_LOGICRETSTATE_MASK, MPU_MOD, - OMAP2_PM_PWSTCTRL); - only_idle = 1; - } - - omap2_sram_idle(); -} - -static int omap2_can_sleep(void) -{ - if (omap2_fclks_active()) - return 0; - if (osc_ck->usecount > 1) - return 0; - if (omap_dma_running()) - return 0; - - return 1; -} - -static void omap2_pm_idle(void) -{ - local_fiq_disable(); - - if (!omap2_can_sleep()) { - if (omap_irq_pending()) - goto out; - omap2_enter_mpu_retention(); - goto out; - } - - if (omap_irq_pending()) - goto out; - - omap2_enter_full_retention(); - -out: - local_fiq_enable(); -} - -static void __init prcm_setup_regs(void) -{ - int i, num_mem_banks; - struct powerdomain *pwrdm; - - /* - * Enable autoidle - * XXX This should be handled by hwmod code or PRCM init code - */ - omap2_prm_write_mod_reg(OMAP24XX_AUTOIDLE_MASK, OCP_MOD, - OMAP2_PRCM_SYSCONFIG_OFFSET); - - /* - * Set CORE powerdomain memory banks to retain their contents - * during RETENTION - */ - num_mem_banks = pwrdm_get_mem_bank_count(core_pwrdm); - for (i = 0; i < num_mem_banks; i++) - pwrdm_set_mem_retst(core_pwrdm, i, PWRDM_POWER_RET); - - /* Set CORE powerdomain's next power state to RETENTION */ - pwrdm_set_next_pwrst(core_pwrdm, PWRDM_POWER_RET); - - /* - * Set MPU powerdomain's next power state to RETENTION; - * preserve logic state during retention - */ - pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET); - pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET); - - /* Force-power down DSP, GFX powerdomains */ - - pwrdm = clkdm_get_pwrdm(dsp_clkdm); - pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); - clkdm_sleep(dsp_clkdm); - - pwrdm = clkdm_get_pwrdm(gfx_clkdm); - pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF); - clkdm_sleep(gfx_clkdm); - - /* Enable hardware-supervised idle for all clkdms */ - clkdm_for_each(omap_pm_clkdms_setup, NULL); - clkdm_add_wkdep(mpu_clkdm, wkup_clkdm); - -#ifdef CONFIG_SUSPEND - omap_pm_suspend = omap2_enter_full_retention; -#endif - - /* REVISIT: Configure number of 32 kHz clock cycles for sys_clk - * stabilisation */ - omap2_prm_write_mod_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, - OMAP2_PRCM_CLKSSETUP_OFFSET); - - /* Configure automatic voltage transition */ - omap2_prm_write_mod_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD, - OMAP2_PRCM_VOLTSETUP_OFFSET); - omap2_prm_write_mod_reg(OMAP24XX_AUTO_EXTVOLT_MASK | - (0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) | - OMAP24XX_MEMRETCTRL_MASK | - (0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) | - (0x0 << OMAP24XX_VOLT_LEVEL_SHIFT), - OMAP24XX_GR_MOD, OMAP2_PRCM_VOLTCTRL_OFFSET); - - /* Enable wake-up events */ - omap2_prm_write_mod_reg(OMAP24XX_EN_GPIOS_MASK | OMAP24XX_EN_GPT1_MASK, - WKUP_MOD, PM_WKEN); -} - -static int __init omap2_pm_init(void) -{ - u32 l; - - if (!cpu_is_omap24xx()) - return -ENODEV; - - printk(KERN_INFO "Power Management for OMAP2 initializing\n"); - l = omap2_prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_REVISION_OFFSET); - printk(KERN_INFO "PRCM revision %d.%d\n", (l >> 4) & 0x0f, l & 0x0f); - - /* Look up important powerdomains */ - - mpu_pwrdm = pwrdm_lookup("mpu_pwrdm"); - if (!mpu_pwrdm) - pr_err("PM: mpu_pwrdm not found\n"); - - core_pwrdm = pwrdm_lookup("core_pwrdm"); - if (!core_pwrdm) - pr_err("PM: core_pwrdm not found\n"); - - /* Look up important clockdomains */ - - mpu_clkdm = clkdm_lookup("mpu_clkdm"); - if (!mpu_clkdm) - pr_err("PM: mpu_clkdm not found\n"); - - wkup_clkdm = clkdm_lookup("wkup_clkdm"); - if (!wkup_clkdm) - pr_err("PM: wkup_clkdm not found\n"); - - dsp_clkdm = clkdm_lookup("dsp_clkdm"); - if (!dsp_clkdm) - pr_err("PM: dsp_clkdm not found\n"); - - gfx_clkdm = clkdm_lookup("gfx_clkdm"); - if (!gfx_clkdm) - pr_err("PM: gfx_clkdm not found\n"); - - - osc_ck = clk_get(NULL, "osc_ck"); - if (IS_ERR(osc_ck)) { - printk(KERN_ERR "could not get osc_ck\n"); - return -ENODEV; - } - - if (cpu_is_omap242x()) { - emul_ck = clk_get(NULL, "emul_ck"); - if (IS_ERR(emul_ck)) { - printk(KERN_ERR "could not get emul_ck\n"); - clk_put(osc_ck); - return -ENODEV; - } - } - - prcm_setup_regs(); - - /* Hack to prevent MPU retention when STI console is enabled. */ - { - const struct omap_sti_console_config *sti; - - sti = omap_get_config(OMAP_TAG_STI_CONSOLE, - struct omap_sti_console_config); - if (sti != NULL && sti->enable) - sti_console_enabled = 1; - } - - /* - * 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_omap24xx()) { - omap2_sram_idle = omap_sram_push(omap24xx_idle_loop_suspend, - omap24xx_idle_loop_suspend_sz); - - omap2_sram_suspend = omap_sram_push(omap24xx_cpu_suspend, - omap24xx_cpu_suspend_sz); - } - - arm_pm_idle = omap2_pm_idle; - - return 0; -} - -late_initcall(omap2_pm_init); |