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OMAP2/3: PM: push core PM code from linux-omap
This patch is to sync the core linux-omap PM code with mainline. This code has evolved and been used for a while the linux-omap tree, but the attempt here is to finally get this into mainline. Following this will be a series of patches from the 'PM branch' of the linux-omap tree to add full PM hardware support from the linux-omap tree. Much of this PM core code was written by Jouni Hogander with significant contributions from Paul Walmsley as well as many others from Nokia, Texas Instruments and linux-omap community. Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com> Cc: Paul Walmsley <paul@pwsan.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Kevin Hilman
parent
a330bd4750
commit
8bd2294922
@ -25,8 +25,10 @@ obj-$(CONFIG_ARCH_OMAP2) += sdrc2xxx.o
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# Power Management
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ifeq ($(CONFIG_PM),y)
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obj-y += pm.o
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obj-$(CONFIG_ARCH_OMAP2) += pm24xx.o
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obj-$(CONFIG_ARCH_OMAP24XX) += sleep24xx.o
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obj-$(CONFIG_ARCH_OMAP3) += pm34xx.o sleep34xx.o
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obj-$(CONFIG_PM_DEBUG) += pm-debug.o
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endif
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# Clock framework
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152
arch/arm/mach-omap2/pm-debug.c
Normal file
152
arch/arm/mach-omap2/pm-debug.c
Normal file
@ -0,0 +1,152 @@
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/*
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* OMAP Power Management debug routines
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*
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* Copyright (C) 2005 Texas Instruments, Inc.
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* Copyright (C) 2006-2008 Nokia Corporation
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*
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* Written by:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Tony Lindgren
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* Juha Yrjola
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* Amit Kucheria <amit.kucheria@nokia.com>
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* Igor Stoppa <igor.stoppa@nokia.com>
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* Jouni Hogander
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*
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* Based on pm.c for omap2
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/timer.h>
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#include <linux/clk.h>
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#include <linux/err.h>
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#include <linux/io.h>
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#include <mach/clock.h>
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#include <mach/board.h>
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#include "prm.h"
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#include "cm.h"
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#include "pm.h"
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int omap2_pm_debug;
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#define DUMP_PRM_MOD_REG(mod, reg) \
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regs[reg_count].name = #mod "." #reg; \
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regs[reg_count++].val = prm_read_mod_reg(mod, reg)
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#define DUMP_CM_MOD_REG(mod, reg) \
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regs[reg_count].name = #mod "." #reg; \
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regs[reg_count++].val = cm_read_mod_reg(mod, reg)
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#define DUMP_PRM_REG(reg) \
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regs[reg_count].name = #reg; \
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regs[reg_count++].val = __raw_readl(reg)
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#define DUMP_CM_REG(reg) \
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regs[reg_count].name = #reg; \
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regs[reg_count++].val = __raw_readl(reg)
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#define DUMP_INTC_REG(reg, off) \
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regs[reg_count].name = #reg; \
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regs[reg_count++].val = __raw_readl(IO_ADDRESS(0x480fe000 + (off)))
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void omap2_pm_dump(int mode, int resume, unsigned int us)
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{
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struct reg {
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const char *name;
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u32 val;
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} regs[32];
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int reg_count = 0, i;
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const char *s1 = NULL, *s2 = NULL;
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if (!resume) {
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#if 0
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/* MPU */
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DUMP_PRM_MOD_REG(OCP_MOD, OMAP2_PRM_IRQENABLE_MPU_OFFSET);
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DUMP_CM_MOD_REG(MPU_MOD, CM_CLKSTCTRL);
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DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTCTRL);
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DUMP_PRM_MOD_REG(MPU_MOD, PM_PWSTST);
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DUMP_PRM_MOD_REG(MPU_MOD, PM_WKDEP);
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#endif
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#if 0
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/* INTC */
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DUMP_INTC_REG(INTC_MIR0, 0x0084);
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DUMP_INTC_REG(INTC_MIR1, 0x00a4);
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DUMP_INTC_REG(INTC_MIR2, 0x00c4);
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#endif
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#if 0
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DUMP_CM_MOD_REG(CORE_MOD, CM_FCLKEN1);
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if (cpu_is_omap24xx()) {
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DUMP_CM_MOD_REG(CORE_MOD, OMAP24XX_CM_FCLKEN2);
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DUMP_PRM_MOD_REG(OMAP24XX_GR_MOD,
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OMAP2_PRCM_CLKEMUL_CTRL_OFFSET);
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DUMP_PRM_MOD_REG(OMAP24XX_GR_MOD,
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OMAP2_PRCM_CLKSRC_CTRL_OFFSET);
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}
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DUMP_CM_MOD_REG(WKUP_MOD, CM_FCLKEN);
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DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN1);
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DUMP_CM_MOD_REG(CORE_MOD, CM_ICLKEN2);
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DUMP_CM_MOD_REG(WKUP_MOD, CM_ICLKEN);
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DUMP_CM_MOD_REG(PLL_MOD, CM_CLKEN);
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DUMP_CM_MOD_REG(PLL_MOD, CM_AUTOIDLE);
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DUMP_PRM_MOD_REG(CORE_MOD, PM_PWSTST);
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#endif
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#if 0
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/* DSP */
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if (cpu_is_omap24xx()) {
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_FCLKEN);
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_ICLKEN);
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_IDLEST);
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_AUTOIDLE);
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSEL);
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DUMP_CM_MOD_REG(OMAP24XX_DSP_MOD, CM_CLKSTCTRL);
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DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTCTRL);
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DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, RM_RSTST);
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DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTCTRL);
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DUMP_PRM_MOD_REG(OMAP24XX_DSP_MOD, PM_PWSTST);
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}
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#endif
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} else {
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DUMP_PRM_MOD_REG(CORE_MOD, PM_WKST1);
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if (cpu_is_omap24xx())
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DUMP_PRM_MOD_REG(CORE_MOD, OMAP24XX_PM_WKST2);
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DUMP_PRM_MOD_REG(WKUP_MOD, PM_WKST);
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DUMP_PRM_MOD_REG(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
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#if 1
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DUMP_INTC_REG(INTC_PENDING_IRQ0, 0x0098);
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DUMP_INTC_REG(INTC_PENDING_IRQ1, 0x00b8);
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DUMP_INTC_REG(INTC_PENDING_IRQ2, 0x00d8);
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#endif
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}
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switch (mode) {
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case 0:
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s1 = "full";
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s2 = "retention";
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break;
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case 1:
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s1 = "MPU";
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s2 = "retention";
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break;
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case 2:
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s1 = "MPU";
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s2 = "idle";
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break;
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}
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if (!resume)
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#ifdef CONFIG_NO_HZ
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printk(KERN_INFO
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"--- Going to %s %s (next timer after %u ms)\n", s1, s2,
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jiffies_to_msecs(get_next_timer_interrupt(jiffies) -
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jiffies));
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#else
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printk(KERN_INFO "--- Going to %s %s\n", s1, s2);
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#endif
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else
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printk(KERN_INFO "--- Woke up (slept for %u.%03u ms)\n",
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us / 1000, us % 1000);
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for (i = 0; i < reg_count; i++)
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printk(KERN_INFO "%-20s: 0x%08x\n", regs[i].name, regs[i].val);
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}
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@ -1,111 +0,0 @@
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/*
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* linux/arch/arm/mach-omap2/pm.c
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*
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* OMAP2 Power Management Routines
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*
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* Copyright (C) 2006 Nokia Corporation
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* Tony Lindgren <tony@atomide.com>
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*
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* Copyright (C) 2005 Texas Instruments, Inc.
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* Richard Woodruff <r-woodruff2@ti.com>
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*
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* Based on pm.c for omap1
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/suspend.h>
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#include <linux/sched.h>
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#include <linux/proc_fs.h>
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#include <linux/interrupt.h>
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#include <linux/sysfs.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <asm/irq.h>
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#include <asm/atomic.h>
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#include <asm/mach/time.h>
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#include <asm/mach/irq.h>
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#include <mach/irqs.h>
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#include <mach/clock.h>
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#include <mach/sram.h>
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#include <mach/pm.h>
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static struct clk *vclk;
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static void (*omap2_sram_idle)(void);
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static void (*omap2_sram_suspend)(int dllctrl, int cpu_rev);
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static void (*saved_idle)(void);
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extern void __init pmdomain_init(void);
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extern void pmdomain_set_autoidle(void);
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static unsigned int omap24xx_sleep_save[OMAP24XX_SLEEP_SAVE_SIZE];
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void omap2_pm_idle(void)
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{
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local_irq_disable();
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local_fiq_disable();
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if (need_resched()) {
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local_fiq_enable();
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local_irq_enable();
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return;
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}
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omap2_sram_idle();
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local_fiq_enable();
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local_irq_enable();
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}
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static int omap2_pm_prepare(void)
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{
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/* We cannot sleep in idle until we have resumed */
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saved_idle = pm_idle;
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pm_idle = NULL;
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return 0;
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}
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static int omap2_pm_suspend(void)
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{
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return 0;
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}
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static int omap2_pm_enter(suspend_state_t state)
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{
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int ret = 0;
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switch (state)
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{
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case PM_SUSPEND_STANDBY:
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case PM_SUSPEND_MEM:
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ret = omap2_pm_suspend();
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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static void omap2_pm_finish(void)
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{
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pm_idle = saved_idle;
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}
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static struct platform_suspend_ops omap_pm_ops = {
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.prepare = omap2_pm_prepare,
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.enter = omap2_pm_enter,
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.finish = omap2_pm_finish,
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.valid = suspend_valid_only_mem,
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};
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static int __init omap2_pm_init(void)
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{
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return 0;
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}
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__initcall(omap2_pm_init);
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38
arch/arm/mach-omap2/pm.h
Normal file
38
arch/arm/mach-omap2/pm.h
Normal file
@ -0,0 +1,38 @@
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/*
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* OMAP2/3 Power Management Routines
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*
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* Copyright (C) 2008 Nokia Corporation
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* Jouni Hogander
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_PM_H
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#define __ARCH_ARM_MACH_OMAP2_PM_H
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extern int omap2_pm_init(void);
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extern int omap3_pm_init(void);
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#ifdef CONFIG_PM_DEBUG
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extern void omap2_pm_dump(int mode, int resume, unsigned int us);
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extern int omap2_pm_debug;
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#else
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#define omap2_pm_dump(mode, resume, us) do {} while (0);
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#define omap2_pm_debug 0
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#endif /* CONFIG_PM_DEBUG */
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extern void omap24xx_idle_loop_suspend(void);
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extern void omap24xx_cpu_suspend(u32 dll_ctrl, void __iomem *sdrc_dlla_ctrl,
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void __iomem *sdrc_power);
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extern void omap34xx_cpu_suspend(u32 *addr, int save_state);
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extern void save_secure_ram_context(u32 *addr);
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extern unsigned int omap24xx_idle_loop_suspend_sz;
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extern unsigned int omap34xx_suspend_sz;
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extern unsigned int save_secure_ram_context_sz;
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extern unsigned int omap24xx_cpu_suspend_sz;
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extern unsigned int omap34xx_cpu_suspend_sz;
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#endif
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548
arch/arm/mach-omap2/pm24xx.c
Normal file
548
arch/arm/mach-omap2/pm24xx.c
Normal file
@ -0,0 +1,548 @@
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/*
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* OMAP2 Power Management Routines
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*
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* Copyright (C) 2005 Texas Instruments, Inc.
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* Copyright (C) 2006-2008 Nokia Corporation
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*
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* Written by:
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* Richard Woodruff <r-woodruff2@ti.com>
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* Tony Lindgren
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* Juha Yrjola
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* Amit Kucheria <amit.kucheria@nokia.com>
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* Igor Stoppa <igor.stoppa@nokia.com>
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*
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* Based on pm.c for omap1
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/suspend.h>
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#include <linux/sched.h>
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#include <linux/proc_fs.h>
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#include <linux/interrupt.h>
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#include <linux/sysfs.h>
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/time.h>
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#include <linux/gpio.h>
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#include <asm/mach/time.h>
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#include <asm/mach/irq.h>
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#include <asm/mach-types.h>
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#include <mach/irqs.h>
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#include <mach/clock.h>
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#include <mach/sram.h>
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#include <mach/control.h>
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#include <mach/mux.h>
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#include <mach/dma.h>
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#include <mach/board.h>
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#include "prm.h"
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#include "prm-regbits-24xx.h"
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#include "cm.h"
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#include "cm-regbits-24xx.h"
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#include "sdrc.h"
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#include "pm.h"
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#include <mach/powerdomain.h>
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#include <mach/clockdomain.h>
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static void (*omap2_sram_idle)(void);
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static void (*omap2_sram_suspend)(u32 dllctrl, void __iomem *sdrc_dlla_ctrl,
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void __iomem *sdrc_power);
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static struct powerdomain *mpu_pwrdm;
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static struct powerdomain *core_pwrdm;
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static struct clockdomain *dsp_clkdm;
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static struct clockdomain *gfx_clkdm;
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static struct clk *osc_ck, *emul_ck;
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static int omap2_fclks_active(void)
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{
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u32 f1, f2;
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f1 = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
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f2 = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
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if (f1 | f2)
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return 1;
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return 0;
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}
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static int omap2_irq_pending(void)
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{
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u32 pending_reg = 0x480fe098;
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int i;
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for (i = 0; i < 4; i++) {
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if (omap_readl(pending_reg))
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return 1;
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pending_reg += 0x20;
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}
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return 0;
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}
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static void omap2_enter_full_retention(void)
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{
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u32 l;
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struct timespec ts_preidle, ts_postidle, ts_idle;
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/* There is 1 reference hold for all children of the oscillator
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* clock, the following will remove it. If no one else uses the
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* oscillator itself it will be disabled if/when we enter retention
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* mode.
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*/
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clk_disable(osc_ck);
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/* Clear old wake-up events */
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/* REVISIT: These write to reserved bits? */
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prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
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prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
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prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
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/*
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* Set MPU powerdomain's next power state to RETENTION;
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* preserve logic state during retention
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*/
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pwrdm_set_logic_retst(mpu_pwrdm, PWRDM_POWER_RET);
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pwrdm_set_next_pwrst(mpu_pwrdm, PWRDM_POWER_RET);
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||||
|
||||
/* Workaround to kill USB */
|
||||
l = omap_ctrl_readl(OMAP2_CONTROL_DEVCONF0) | OMAP24XX_USBSTANDBYCTRL;
|
||||
omap_ctrl_writel(l, OMAP2_CONTROL_DEVCONF0);
|
||||
|
||||
omap2_gpio_prepare_for_retention();
|
||||
|
||||
if (omap2_pm_debug) {
|
||||
omap2_pm_dump(0, 0, 0);
|
||||
getnstimeofday(&ts_preidle);
|
||||
}
|
||||
|
||||
/* One last check for pending IRQs to avoid extra latency due
|
||||
* to sleeping unnecessarily. */
|
||||
if (omap2_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:
|
||||
|
||||
if (omap2_pm_debug) {
|
||||
unsigned long long tmp;
|
||||
|
||||
getnstimeofday(&ts_postidle);
|
||||
ts_idle = timespec_sub(ts_postidle, ts_preidle);
|
||||
tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
|
||||
omap2_pm_dump(0, 1, tmp);
|
||||
}
|
||||
omap2_gpio_resume_after_retention();
|
||||
|
||||
clk_enable(osc_ck);
|
||||
|
||||
/* clear CORE wake-up events */
|
||||
prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
|
||||
prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
|
||||
|
||||
/* wakeup domain events - bit 1: GPT1, bit5 GPIO */
|
||||
prm_clear_mod_reg_bits(0x4 | 0x1, WKUP_MOD, PM_WKST);
|
||||
|
||||
/* MPU domain wake events */
|
||||
l = prm_read_mod_reg(OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
|
||||
if (l & 0x01)
|
||||
prm_write_mod_reg(0x01, OCP_MOD,
|
||||
OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
|
||||
if (l & 0x20)
|
||||
prm_write_mod_reg(0x20, OCP_MOD,
|
||||
OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
|
||||
|
||||
/* Mask future PRCM-to-MPU interrupts */
|
||||
prm_write_mod_reg(0x0, OCP_MOD, OMAP2_PRCM_IRQSTATUS_MPU_OFFSET);
|
||||
}
|
||||
|
||||
static int omap2_i2c_active(void)
|
||||
{
|
||||
u32 l;
|
||||
|
||||
l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
|
||||
return l & (OMAP2420_EN_I2C2 | OMAP2420_EN_I2C1);
|
||||
}
|
||||
|
||||
static int sti_console_enabled;
|
||||
|
||||
static int omap2_allow_mpu_retention(void)
|
||||
{
|
||||
u32 l;
|
||||
|
||||
/* Check for MMC, UART2, UART1, McSPI2, McSPI1 and DSS1. */
|
||||
l = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
|
||||
if (l & (OMAP2420_EN_MMC | OMAP24XX_EN_UART2 |
|
||||
OMAP24XX_EN_UART1 | OMAP24XX_EN_MCSPI2 |
|
||||
OMAP24XX_EN_MCSPI1 | OMAP24XX_EN_DSS1))
|
||||
return 0;
|
||||
/* Check for UART3. */
|
||||
l = cm_read_mod_reg(CORE_MOD, OMAP24XX_CM_FCLKEN2);
|
||||
if (l & OMAP24XX_EN_UART3)
|
||||
return 0;
|
||||
if (sti_console_enabled)
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static void omap2_enter_mpu_retention(void)
|
||||
{
|
||||
int only_idle = 0;
|
||||
struct timespec ts_preidle, ts_postidle, ts_idle;
|
||||
|
||||
/* 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? */
|
||||
prm_write_mod_reg(0xffffffff, CORE_MOD, PM_WKST1);
|
||||
prm_write_mod_reg(0xffffffff, CORE_MOD, OMAP24XX_PM_WKST2);
|
||||
prm_write_mod_reg(0xffffffff, WKUP_MOD, PM_WKST);
|
||||
|
||||
/* Try to enter MPU retention */
|
||||
prm_write_mod_reg((0x01 << OMAP_POWERSTATE_SHIFT) |
|
||||
OMAP_LOGICRETSTATE,
|
||||
MPU_MOD, PM_PWSTCTRL);
|
||||
} else {
|
||||
/* Block MPU retention */
|
||||
|
||||
prm_write_mod_reg(OMAP_LOGICRETSTATE, MPU_MOD, PM_PWSTCTRL);
|
||||
only_idle = 1;
|
||||
}
|
||||
|
||||
if (omap2_pm_debug) {
|
||||
omap2_pm_dump(only_idle ? 2 : 1, 0, 0);
|
||||
getnstimeofday(&ts_preidle);
|
||||
}
|
||||
|
||||
omap2_sram_idle();
|
||||
|
||||
if (omap2_pm_debug) {
|
||||
unsigned long long tmp;
|
||||
|
||||
getnstimeofday(&ts_postidle);
|
||||
ts_idle = timespec_sub(ts_postidle, ts_preidle);
|
||||
tmp = timespec_to_ns(&ts_idle) * NSEC_PER_USEC;
|
||||
omap2_pm_dump(only_idle ? 2 : 1, 1, tmp);
|
||||
}
|
||||
}
|
||||
|
||||
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_irq_disable();
|
||||
local_fiq_disable();
|
||||
|
||||
if (!omap2_can_sleep()) {
|
||||
if (omap2_irq_pending())
|
||||
goto out;
|
||||
omap2_enter_mpu_retention();
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (omap2_irq_pending())
|
||||
goto out;
|
||||
|
||||
omap2_enter_full_retention();
|
||||
|
||||
out:
|
||||
local_fiq_enable();
|
||||
local_irq_enable();
|
||||
}
|
||||
|
||||
static int omap2_pm_prepare(void)
|
||||
{
|
||||
/* We cannot sleep in idle until we have resumed */
|
||||
disable_hlt();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap2_pm_suspend(void)
|
||||
{
|
||||
u32 wken_wkup, mir1;
|
||||
|
||||
wken_wkup = prm_read_mod_reg(WKUP_MOD, PM_WKEN);
|
||||
prm_write_mod_reg(wken_wkup & ~OMAP24XX_EN_GPT1, WKUP_MOD, PM_WKEN);
|
||||
|
||||
/* Mask GPT1 */
|
||||
mir1 = omap_readl(0x480fe0a4);
|
||||
omap_writel(1 << 5, 0x480fe0ac);
|
||||
|
||||
omap2_enter_full_retention();
|
||||
|
||||
omap_writel(mir1, 0x480fe0a4);
|
||||
prm_write_mod_reg(wken_wkup, WKUP_MOD, PM_WKEN);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap2_pm_enter(suspend_state_t state)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
switch (state) {
|
||||
case PM_SUSPEND_STANDBY:
|
||||
case PM_SUSPEND_MEM:
|
||||
ret = omap2_pm_suspend();
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void omap2_pm_finish(void)
|
||||
{
|
||||
enable_hlt();
|
||||
}
|
||||
|
||||
static struct platform_suspend_ops omap_pm_ops = {
|
||||
.prepare = omap2_pm_prepare,
|
||||
.enter = omap2_pm_enter,
|
||||
.finish = omap2_pm_finish,
|
||||
.valid = suspend_valid_only_mem,
|
||||
};
|
||||
|
||||
static int _pm_clkdm_enable_hwsup(struct clockdomain *clkdm)
|
||||
{
|
||||
omap2_clkdm_allow_idle(clkdm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __init prcm_setup_regs(void)
|
||||
{
|
||||
int i, num_mem_banks;
|
||||
struct powerdomain *pwrdm;
|
||||
|
||||
/* Enable autoidle */
|
||||
prm_write_mod_reg(OMAP24XX_AUTOIDLE, OCP_MOD,
|
||||
OMAP2_PRCM_SYSCONFIG_OFFSET);
|
||||
|
||||
/* Set all domain wakeup dependencies */
|
||||
prm_write_mod_reg(OMAP_EN_WKUP_MASK, MPU_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP24XX_DSP_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, CORE_MOD, PM_WKDEP);
|
||||
if (cpu_is_omap2430())
|
||||
prm_write_mod_reg(0, OMAP2430_MDM_MOD, PM_WKDEP);
|
||||
|
||||
/*
|
||||
* 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);
|
||||
omap2_clkdm_sleep(dsp_clkdm);
|
||||
|
||||
pwrdm = clkdm_get_pwrdm(gfx_clkdm);
|
||||
pwrdm_set_next_pwrst(pwrdm, PWRDM_POWER_OFF);
|
||||
omap2_clkdm_sleep(gfx_clkdm);
|
||||
|
||||
/* Enable clockdomain hardware-supervised control for all clkdms */
|
||||
clkdm_for_each(_pm_clkdm_enable_hwsup);
|
||||
|
||||
/* Enable clock autoidle for all domains */
|
||||
cm_write_mod_reg(OMAP24XX_AUTO_CAM |
|
||||
OMAP24XX_AUTO_MAILBOXES |
|
||||
OMAP24XX_AUTO_WDT4 |
|
||||
OMAP2420_AUTO_WDT3 |
|
||||
OMAP24XX_AUTO_MSPRO |
|
||||
OMAP2420_AUTO_MMC |
|
||||
OMAP24XX_AUTO_FAC |
|
||||
OMAP2420_AUTO_EAC |
|
||||
OMAP24XX_AUTO_HDQ |
|
||||
OMAP24XX_AUTO_UART2 |
|
||||
OMAP24XX_AUTO_UART1 |
|
||||
OMAP24XX_AUTO_I2C2 |
|
||||
OMAP24XX_AUTO_I2C1 |
|
||||
OMAP24XX_AUTO_MCSPI2 |
|
||||
OMAP24XX_AUTO_MCSPI1 |
|
||||
OMAP24XX_AUTO_MCBSP2 |
|
||||
OMAP24XX_AUTO_MCBSP1 |
|
||||
OMAP24XX_AUTO_GPT12 |
|
||||
OMAP24XX_AUTO_GPT11 |
|
||||
OMAP24XX_AUTO_GPT10 |
|
||||
OMAP24XX_AUTO_GPT9 |
|
||||
OMAP24XX_AUTO_GPT8 |
|
||||
OMAP24XX_AUTO_GPT7 |
|
||||
OMAP24XX_AUTO_GPT6 |
|
||||
OMAP24XX_AUTO_GPT5 |
|
||||
OMAP24XX_AUTO_GPT4 |
|
||||
OMAP24XX_AUTO_GPT3 |
|
||||
OMAP24XX_AUTO_GPT2 |
|
||||
OMAP2420_AUTO_VLYNQ |
|
||||
OMAP24XX_AUTO_DSS,
|
||||
CORE_MOD, CM_AUTOIDLE1);
|
||||
cm_write_mod_reg(OMAP24XX_AUTO_UART3 |
|
||||
OMAP24XX_AUTO_SSI |
|
||||
OMAP24XX_AUTO_USB,
|
||||
CORE_MOD, CM_AUTOIDLE2);
|
||||
cm_write_mod_reg(OMAP24XX_AUTO_SDRC |
|
||||
OMAP24XX_AUTO_GPMC |
|
||||
OMAP24XX_AUTO_SDMA,
|
||||
CORE_MOD, CM_AUTOIDLE3);
|
||||
cm_write_mod_reg(OMAP24XX_AUTO_PKA |
|
||||
OMAP24XX_AUTO_AES |
|
||||
OMAP24XX_AUTO_RNG |
|
||||
OMAP24XX_AUTO_SHA |
|
||||
OMAP24XX_AUTO_DES,
|
||||
CORE_MOD, OMAP24XX_CM_AUTOIDLE4);
|
||||
|
||||
cm_write_mod_reg(OMAP2420_AUTO_DSP_IPI, OMAP24XX_DSP_MOD, CM_AUTOIDLE);
|
||||
|
||||
/* Put DPLL and both APLLs into autoidle mode */
|
||||
cm_write_mod_reg((0x03 << OMAP24XX_AUTO_DPLL_SHIFT) |
|
||||
(0x03 << OMAP24XX_AUTO_96M_SHIFT) |
|
||||
(0x03 << OMAP24XX_AUTO_54M_SHIFT),
|
||||
PLL_MOD, CM_AUTOIDLE);
|
||||
|
||||
cm_write_mod_reg(OMAP24XX_AUTO_OMAPCTRL |
|
||||
OMAP24XX_AUTO_WDT1 |
|
||||
OMAP24XX_AUTO_MPU_WDT |
|
||||
OMAP24XX_AUTO_GPIOS |
|
||||
OMAP24XX_AUTO_32KSYNC |
|
||||
OMAP24XX_AUTO_GPT1,
|
||||
WKUP_MOD, CM_AUTOIDLE);
|
||||
|
||||
/* REVISIT: Configure number of 32 kHz clock cycles for sys_clk
|
||||
* stabilisation */
|
||||
prm_write_mod_reg(15 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD,
|
||||
OMAP2_PRCM_CLKSSETUP_OFFSET);
|
||||
|
||||
/* Configure automatic voltage transition */
|
||||
prm_write_mod_reg(2 << OMAP_SETUP_TIME_SHIFT, OMAP24XX_GR_MOD,
|
||||
OMAP2_PRCM_VOLTSETUP_OFFSET);
|
||||
prm_write_mod_reg(OMAP24XX_AUTO_EXTVOLT |
|
||||
(0x1 << OMAP24XX_SETOFF_LEVEL_SHIFT) |
|
||||
OMAP24XX_MEMRETCTRL |
|
||||
(0x1 << OMAP24XX_SETRET_LEVEL_SHIFT) |
|
||||
(0x0 << OMAP24XX_VOLT_LEVEL_SHIFT),
|
||||
OMAP24XX_GR_MOD, OMAP2_PRCM_VOLTCTRL_OFFSET);
|
||||
|
||||
/* Enable wake-up events */
|
||||
prm_write_mod_reg(OMAP24XX_EN_GPIOS | OMAP24XX_EN_GPT1,
|
||||
WKUP_MOD, PM_WKEN);
|
||||
}
|
||||
|
||||
int __init omap2_pm_init(void)
|
||||
{
|
||||
u32 l;
|
||||
|
||||
if (!cpu_is_omap24xx())
|
||||
return -ENODEV;
|
||||
|
||||
printk(KERN_INFO "Power Management for OMAP2 initializing\n");
|
||||
l = 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, clockdomains */
|
||||
|
||||
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");
|
||||
|
||||
dsp_clkdm = clkdm_lookup("dsp_clkdm");
|
||||
if (!dsp_clkdm)
|
||||
pr_err("PM: mpu_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);
|
||||
}
|
||||
|
||||
suspend_set_ops(&omap_pm_ops);
|
||||
pm_idle = omap2_pm_idle;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
late_initcall(omap2_pm_init);
|
||||
606
arch/arm/mach-omap2/pm34xx.c
Normal file
606
arch/arm/mach-omap2/pm34xx.c
Normal file
@ -0,0 +1,606 @@
|
||||
/*
|
||||
* OMAP3 Power Management Routines
|
||||
*
|
||||
* Copyright (C) 2006-2008 Nokia Corporation
|
||||
* Tony Lindgren <tony@atomide.com>
|
||||
* Jouni Hogander
|
||||
*
|
||||
* Copyright (C) 2005 Texas Instruments, Inc.
|
||||
* Richard Woodruff <r-woodruff2@ti.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/pm.h>
|
||||
#include <linux/suspend.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/gpio.h>
|
||||
|
||||
#include <mach/sram.h>
|
||||
#include <mach/clockdomain.h>
|
||||
#include <mach/powerdomain.h>
|
||||
#include <mach/control.h>
|
||||
|
||||
#include "cm.h"
|
||||
#include "cm-regbits-34xx.h"
|
||||
#include "prm-regbits-34xx.h"
|
||||
|
||||
#include "prm.h"
|
||||
#include "pm.h"
|
||||
|
||||
struct power_state {
|
||||
struct powerdomain *pwrdm;
|
||||
u32 next_state;
|
||||
u32 saved_state;
|
||||
struct list_head node;
|
||||
};
|
||||
|
||||
static LIST_HEAD(pwrst_list);
|
||||
|
||||
static void (*_omap_sram_idle)(u32 *addr, int save_state);
|
||||
|
||||
static struct powerdomain *mpu_pwrdm;
|
||||
|
||||
/* PRCM Interrupt Handler for wakeups */
|
||||
static irqreturn_t prcm_interrupt_handler (int irq, void *dev_id)
|
||||
{
|
||||
u32 wkst, irqstatus_mpu;
|
||||
u32 fclk, iclk;
|
||||
|
||||
/* WKUP */
|
||||
wkst = prm_read_mod_reg(WKUP_MOD, PM_WKST);
|
||||
if (wkst) {
|
||||
iclk = cm_read_mod_reg(WKUP_MOD, CM_ICLKEN);
|
||||
fclk = cm_read_mod_reg(WKUP_MOD, CM_FCLKEN);
|
||||
cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_ICLKEN);
|
||||
cm_set_mod_reg_bits(wkst, WKUP_MOD, CM_FCLKEN);
|
||||
prm_write_mod_reg(wkst, WKUP_MOD, PM_WKST);
|
||||
while (prm_read_mod_reg(WKUP_MOD, PM_WKST))
|
||||
cpu_relax();
|
||||
cm_write_mod_reg(iclk, WKUP_MOD, CM_ICLKEN);
|
||||
cm_write_mod_reg(fclk, WKUP_MOD, CM_FCLKEN);
|
||||
}
|
||||
|
||||
/* CORE */
|
||||
wkst = prm_read_mod_reg(CORE_MOD, PM_WKST1);
|
||||
if (wkst) {
|
||||
iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN1);
|
||||
fclk = cm_read_mod_reg(CORE_MOD, CM_FCLKEN1);
|
||||
cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN1);
|
||||
cm_set_mod_reg_bits(wkst, CORE_MOD, CM_FCLKEN1);
|
||||
prm_write_mod_reg(wkst, CORE_MOD, PM_WKST1);
|
||||
while (prm_read_mod_reg(CORE_MOD, PM_WKST1))
|
||||
cpu_relax();
|
||||
cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN1);
|
||||
cm_write_mod_reg(fclk, CORE_MOD, CM_FCLKEN1);
|
||||
}
|
||||
wkst = prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3);
|
||||
if (wkst) {
|
||||
iclk = cm_read_mod_reg(CORE_MOD, CM_ICLKEN3);
|
||||
fclk = cm_read_mod_reg(CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
|
||||
cm_set_mod_reg_bits(wkst, CORE_MOD, CM_ICLKEN3);
|
||||
cm_set_mod_reg_bits(wkst, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
|
||||
prm_write_mod_reg(wkst, CORE_MOD, OMAP3430ES2_PM_WKST3);
|
||||
while (prm_read_mod_reg(CORE_MOD, OMAP3430ES2_PM_WKST3))
|
||||
cpu_relax();
|
||||
cm_write_mod_reg(iclk, CORE_MOD, CM_ICLKEN3);
|
||||
cm_write_mod_reg(fclk, CORE_MOD, OMAP3430ES2_CM_FCLKEN3);
|
||||
}
|
||||
|
||||
/* PER */
|
||||
wkst = prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST);
|
||||
if (wkst) {
|
||||
iclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_ICLKEN);
|
||||
fclk = cm_read_mod_reg(OMAP3430_PER_MOD, CM_FCLKEN);
|
||||
cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_ICLKEN);
|
||||
cm_set_mod_reg_bits(wkst, OMAP3430_PER_MOD, CM_FCLKEN);
|
||||
prm_write_mod_reg(wkst, OMAP3430_PER_MOD, PM_WKST);
|
||||
while (prm_read_mod_reg(OMAP3430_PER_MOD, PM_WKST))
|
||||
cpu_relax();
|
||||
cm_write_mod_reg(iclk, OMAP3430_PER_MOD, CM_ICLKEN);
|
||||
cm_write_mod_reg(fclk, OMAP3430_PER_MOD, CM_FCLKEN);
|
||||
}
|
||||
|
||||
if (omap_rev() > OMAP3430_REV_ES1_0) {
|
||||
/* USBHOST */
|
||||
wkst = prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD, PM_WKST);
|
||||
if (wkst) {
|
||||
iclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
|
||||
CM_ICLKEN);
|
||||
fclk = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
|
||||
CM_FCLKEN);
|
||||
cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
|
||||
CM_ICLKEN);
|
||||
cm_set_mod_reg_bits(wkst, OMAP3430ES2_USBHOST_MOD,
|
||||
CM_FCLKEN);
|
||||
prm_write_mod_reg(wkst, OMAP3430ES2_USBHOST_MOD,
|
||||
PM_WKST);
|
||||
while (prm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
|
||||
PM_WKST))
|
||||
cpu_relax();
|
||||
cm_write_mod_reg(iclk, OMAP3430ES2_USBHOST_MOD,
|
||||
CM_ICLKEN);
|
||||
cm_write_mod_reg(fclk, OMAP3430ES2_USBHOST_MOD,
|
||||
CM_FCLKEN);
|
||||
}
|
||||
}
|
||||
|
||||
irqstatus_mpu = prm_read_mod_reg(OCP_MOD,
|
||||
OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
|
||||
prm_write_mod_reg(irqstatus_mpu, OCP_MOD,
|
||||
OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
|
||||
|
||||
while (prm_read_mod_reg(OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET))
|
||||
cpu_relax();
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static void omap_sram_idle(void)
|
||||
{
|
||||
/* Variable to tell what needs to be saved and restored
|
||||
* in omap_sram_idle*/
|
||||
/* save_state = 0 => Nothing to save and restored */
|
||||
/* save_state = 1 => Only L1 and logic lost */
|
||||
/* save_state = 2 => Only L2 lost */
|
||||
/* save_state = 3 => L1, L2 and logic lost */
|
||||
int save_state = 0, mpu_next_state;
|
||||
|
||||
if (!_omap_sram_idle)
|
||||
return;
|
||||
|
||||
mpu_next_state = pwrdm_read_next_pwrst(mpu_pwrdm);
|
||||
switch (mpu_next_state) {
|
||||
case PWRDM_POWER_RET:
|
||||
/* No need to save context */
|
||||
save_state = 0;
|
||||
break;
|
||||
default:
|
||||
/* Invalid state */
|
||||
printk(KERN_ERR "Invalid mpu state in sram_idle\n");
|
||||
return;
|
||||
}
|
||||
omap2_gpio_prepare_for_retention();
|
||||
|
||||
_omap_sram_idle(NULL, save_state);
|
||||
cpu_init();
|
||||
|
||||
omap2_gpio_resume_after_retention();
|
||||
}
|
||||
|
||||
/*
|
||||
* Check if functional clocks are enabled before entering
|
||||
* sleep. This function could be behind CONFIG_PM_DEBUG
|
||||
* when all drivers are configuring their sysconfig registers
|
||||
* properly and using their clocks properly.
|
||||
*/
|
||||
static int omap3_fclks_active(void)
|
||||
{
|
||||
u32 fck_core1 = 0, fck_core3 = 0, fck_sgx = 0, fck_dss = 0,
|
||||
fck_cam = 0, fck_per = 0, fck_usbhost = 0;
|
||||
|
||||
fck_core1 = cm_read_mod_reg(CORE_MOD,
|
||||
CM_FCLKEN1);
|
||||
if (omap_rev() > OMAP3430_REV_ES1_0) {
|
||||
fck_core3 = cm_read_mod_reg(CORE_MOD,
|
||||
OMAP3430ES2_CM_FCLKEN3);
|
||||
fck_sgx = cm_read_mod_reg(OMAP3430ES2_SGX_MOD,
|
||||
CM_FCLKEN);
|
||||
fck_usbhost = cm_read_mod_reg(OMAP3430ES2_USBHOST_MOD,
|
||||
CM_FCLKEN);
|
||||
} else
|
||||
fck_sgx = cm_read_mod_reg(GFX_MOD,
|
||||
OMAP3430ES2_CM_FCLKEN3);
|
||||
fck_dss = cm_read_mod_reg(OMAP3430_DSS_MOD,
|
||||
CM_FCLKEN);
|
||||
fck_cam = cm_read_mod_reg(OMAP3430_CAM_MOD,
|
||||
CM_FCLKEN);
|
||||
fck_per = cm_read_mod_reg(OMAP3430_PER_MOD,
|
||||
CM_FCLKEN);
|
||||
if (fck_core1 | fck_core3 | fck_sgx | fck_dss |
|
||||
fck_cam | fck_per | fck_usbhost)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap3_can_sleep(void)
|
||||
{
|
||||
if (omap3_fclks_active())
|
||||
return 0;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* This sets pwrdm state (other than mpu & core. Currently only ON &
|
||||
* RET are supported. Function is assuming that clkdm doesn't have
|
||||
* hw_sup mode enabled. */
|
||||
static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state)
|
||||
{
|
||||
u32 cur_state;
|
||||
int sleep_switch = 0;
|
||||
int ret = 0;
|
||||
|
||||
if (pwrdm == NULL || IS_ERR(pwrdm))
|
||||
return -EINVAL;
|
||||
|
||||
while (!(pwrdm->pwrsts & (1 << state))) {
|
||||
if (state == PWRDM_POWER_OFF)
|
||||
return ret;
|
||||
state--;
|
||||
}
|
||||
|
||||
cur_state = pwrdm_read_next_pwrst(pwrdm);
|
||||
if (cur_state == state)
|
||||
return ret;
|
||||
|
||||
if (pwrdm_read_pwrst(pwrdm) < PWRDM_POWER_ON) {
|
||||
omap2_clkdm_wakeup(pwrdm->pwrdm_clkdms[0]);
|
||||
sleep_switch = 1;
|
||||
pwrdm_wait_transition(pwrdm);
|
||||
}
|
||||
|
||||
ret = pwrdm_set_next_pwrst(pwrdm, state);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "Unable to set state of powerdomain: %s\n",
|
||||
pwrdm->name);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (sleep_switch) {
|
||||
omap2_clkdm_allow_idle(pwrdm->pwrdm_clkdms[0]);
|
||||
pwrdm_wait_transition(pwrdm);
|
||||
}
|
||||
|
||||
err:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void omap3_pm_idle(void)
|
||||
{
|
||||
local_irq_disable();
|
||||
local_fiq_disable();
|
||||
|
||||
if (!omap3_can_sleep())
|
||||
goto out;
|
||||
|
||||
if (omap_irq_pending())
|
||||
goto out;
|
||||
|
||||
omap_sram_idle();
|
||||
|
||||
out:
|
||||
local_fiq_enable();
|
||||
local_irq_enable();
|
||||
}
|
||||
|
||||
static int omap3_pm_prepare(void)
|
||||
{
|
||||
disable_hlt();
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int omap3_pm_suspend(void)
|
||||
{
|
||||
struct power_state *pwrst;
|
||||
int state, ret = 0;
|
||||
|
||||
/* Read current next_pwrsts */
|
||||
list_for_each_entry(pwrst, &pwrst_list, node)
|
||||
pwrst->saved_state = pwrdm_read_next_pwrst(pwrst->pwrdm);
|
||||
/* Set ones wanted by suspend */
|
||||
list_for_each_entry(pwrst, &pwrst_list, node) {
|
||||
if (set_pwrdm_state(pwrst->pwrdm, pwrst->next_state))
|
||||
goto restore;
|
||||
if (pwrdm_clear_all_prev_pwrst(pwrst->pwrdm))
|
||||
goto restore;
|
||||
}
|
||||
|
||||
omap_sram_idle();
|
||||
|
||||
restore:
|
||||
/* Restore next_pwrsts */
|
||||
list_for_each_entry(pwrst, &pwrst_list, node) {
|
||||
set_pwrdm_state(pwrst->pwrdm, pwrst->saved_state);
|
||||
state = pwrdm_read_prev_pwrst(pwrst->pwrdm);
|
||||
if (state > pwrst->next_state) {
|
||||
printk(KERN_INFO "Powerdomain (%s) didn't enter "
|
||||
"target state %d\n",
|
||||
pwrst->pwrdm->name, pwrst->next_state);
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
if (ret)
|
||||
printk(KERN_ERR "Could not enter target state in pm_suspend\n");
|
||||
else
|
||||
printk(KERN_INFO "Successfully put all powerdomains "
|
||||
"to target state\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int omap3_pm_enter(suspend_state_t state)
|
||||
{
|
||||
int ret = 0;
|
||||
|
||||
switch (state) {
|
||||
case PM_SUSPEND_STANDBY:
|
||||
case PM_SUSPEND_MEM:
|
||||
ret = omap3_pm_suspend();
|
||||
break;
|
||||
default:
|
||||
ret = -EINVAL;
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static void omap3_pm_finish(void)
|
||||
{
|
||||
enable_hlt();
|
||||
}
|
||||
|
||||
static struct platform_suspend_ops omap_pm_ops = {
|
||||
.prepare = omap3_pm_prepare,
|
||||
.enter = omap3_pm_enter,
|
||||
.finish = omap3_pm_finish,
|
||||
.valid = suspend_valid_only_mem,
|
||||
};
|
||||
|
||||
static void __init prcm_setup_regs(void)
|
||||
{
|
||||
/* reset modem */
|
||||
prm_write_mod_reg(OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RSTPWRON |
|
||||
OMAP3430_RM_RSTCTRL_CORE_MODEM_SW_RST,
|
||||
CORE_MOD, RM_RSTCTRL);
|
||||
prm_write_mod_reg(0, CORE_MOD, RM_RSTCTRL);
|
||||
|
||||
/* XXX Reset all wkdeps. This should be done when initializing
|
||||
* powerdomains */
|
||||
prm_write_mod_reg(0, OMAP3430_IVA2_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, MPU_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP3430_DSS_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP3430_NEON_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP3430_CAM_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP3430_PER_MOD, PM_WKDEP);
|
||||
if (omap_rev() > OMAP3430_REV_ES1_0) {
|
||||
prm_write_mod_reg(0, OMAP3430ES2_SGX_MOD, PM_WKDEP);
|
||||
prm_write_mod_reg(0, OMAP3430ES2_USBHOST_MOD, PM_WKDEP);
|
||||
} else
|
||||
prm_write_mod_reg(0, GFX_MOD, PM_WKDEP);
|
||||
|
||||
/*
|
||||
* Enable interface clock autoidle for all modules.
|
||||
* Note that in the long run this should be done by clockfw
|
||||
*/
|
||||
cm_write_mod_reg(
|
||||
OMAP3430ES2_AUTO_MMC3 |
|
||||
OMAP3430ES2_AUTO_ICR |
|
||||
OMAP3430_AUTO_AES2 |
|
||||
OMAP3430_AUTO_SHA12 |
|
||||
OMAP3430_AUTO_DES2 |
|
||||
OMAP3430_AUTO_MMC2 |
|
||||
OMAP3430_AUTO_MMC1 |
|
||||
OMAP3430_AUTO_MSPRO |
|
||||
OMAP3430_AUTO_HDQ |
|
||||
OMAP3430_AUTO_MCSPI4 |
|
||||
OMAP3430_AUTO_MCSPI3 |
|
||||
OMAP3430_AUTO_MCSPI2 |
|
||||
OMAP3430_AUTO_MCSPI1 |
|
||||
OMAP3430_AUTO_I2C3 |
|
||||
OMAP3430_AUTO_I2C2 |
|
||||
OMAP3430_AUTO_I2C1 |
|
||||
OMAP3430_AUTO_UART2 |
|
||||
OMAP3430_AUTO_UART1 |
|
||||
OMAP3430_AUTO_GPT11 |
|
||||
OMAP3430_AUTO_GPT10 |
|
||||
OMAP3430_AUTO_MCBSP5 |
|
||||
OMAP3430_AUTO_MCBSP1 |
|
||||
OMAP3430ES1_AUTO_FAC | /* This is es1 only */
|
||||
OMAP3430_AUTO_MAILBOXES |
|
||||
OMAP3430_AUTO_OMAPCTRL |
|
||||
OMAP3430ES1_AUTO_FSHOSTUSB |
|
||||
OMAP3430_AUTO_HSOTGUSB |
|
||||
OMAP3430ES1_AUTO_D2D | /* This is es1 only */
|
||||
OMAP3430_AUTO_SSI,
|
||||
CORE_MOD, CM_AUTOIDLE1);
|
||||
|
||||
cm_write_mod_reg(
|
||||
OMAP3430_AUTO_PKA |
|
||||
OMAP3430_AUTO_AES1 |
|
||||
OMAP3430_AUTO_RNG |
|
||||
OMAP3430_AUTO_SHA11 |
|
||||
OMAP3430_AUTO_DES1,
|
||||
CORE_MOD, CM_AUTOIDLE2);
|
||||
|
||||
if (omap_rev() > OMAP3430_REV_ES1_0) {
|
||||
cm_write_mod_reg(
|
||||
OMAP3430ES2_AUTO_USBTLL,
|
||||
CORE_MOD, CM_AUTOIDLE3);
|
||||
}
|
||||
|
||||
cm_write_mod_reg(
|
||||
OMAP3430_AUTO_WDT2 |
|
||||
OMAP3430_AUTO_WDT1 |
|
||||
OMAP3430_AUTO_GPIO1 |
|
||||
OMAP3430_AUTO_32KSYNC |
|
||||
OMAP3430_AUTO_GPT12 |
|
||||
OMAP3430_AUTO_GPT1 ,
|
||||
WKUP_MOD, CM_AUTOIDLE);
|
||||
|
||||
cm_write_mod_reg(
|
||||
OMAP3430_AUTO_DSS,
|
||||
OMAP3430_DSS_MOD,
|
||||
CM_AUTOIDLE);
|
||||
|
||||
cm_write_mod_reg(
|
||||
OMAP3430_AUTO_CAM,
|
||||
OMAP3430_CAM_MOD,
|
||||
CM_AUTOIDLE);
|
||||
|
||||
cm_write_mod_reg(
|
||||
OMAP3430_AUTO_GPIO6 |
|
||||
OMAP3430_AUTO_GPIO5 |
|
||||
OMAP3430_AUTO_GPIO4 |
|
||||
OMAP3430_AUTO_GPIO3 |
|
||||
OMAP3430_AUTO_GPIO2 |
|
||||
OMAP3430_AUTO_WDT3 |
|
||||
OMAP3430_AUTO_UART3 |
|
||||
OMAP3430_AUTO_GPT9 |
|
||||
OMAP3430_AUTO_GPT8 |
|
||||
OMAP3430_AUTO_GPT7 |
|
||||
OMAP3430_AUTO_GPT6 |
|
||||
OMAP3430_AUTO_GPT5 |
|
||||
OMAP3430_AUTO_GPT4 |
|
||||
OMAP3430_AUTO_GPT3 |
|
||||
OMAP3430_AUTO_GPT2 |
|
||||
OMAP3430_AUTO_MCBSP4 |
|
||||
OMAP3430_AUTO_MCBSP3 |
|
||||
OMAP3430_AUTO_MCBSP2,
|
||||
OMAP3430_PER_MOD,
|
||||
CM_AUTOIDLE);
|
||||
|
||||
if (omap_rev() > OMAP3430_REV_ES1_0) {
|
||||
cm_write_mod_reg(
|
||||
OMAP3430ES2_AUTO_USBHOST,
|
||||
OMAP3430ES2_USBHOST_MOD,
|
||||
CM_AUTOIDLE);
|
||||
}
|
||||
|
||||
/*
|
||||
* Set all plls to autoidle. This is needed until autoidle is
|
||||
* enabled by clockfw
|
||||
*/
|
||||
cm_write_mod_reg(1 << OMAP3430_AUTO_IVA2_DPLL_SHIFT,
|
||||
OMAP3430_IVA2_MOD, CM_AUTOIDLE2);
|
||||
cm_write_mod_reg(1 << OMAP3430_AUTO_MPU_DPLL_SHIFT,
|
||||
MPU_MOD,
|
||||
CM_AUTOIDLE2);
|
||||
cm_write_mod_reg((1 << OMAP3430_AUTO_PERIPH_DPLL_SHIFT) |
|
||||
(1 << OMAP3430_AUTO_CORE_DPLL_SHIFT),
|
||||
PLL_MOD,
|
||||
CM_AUTOIDLE);
|
||||
cm_write_mod_reg(1 << OMAP3430ES2_AUTO_PERIPH2_DPLL_SHIFT,
|
||||
PLL_MOD,
|
||||
CM_AUTOIDLE2);
|
||||
|
||||
/*
|
||||
* Enable control of expternal oscillator through
|
||||
* sys_clkreq. In the long run clock framework should
|
||||
* take care of this.
|
||||
*/
|
||||
prm_rmw_mod_reg_bits(OMAP_AUTOEXTCLKMODE_MASK,
|
||||
1 << OMAP_AUTOEXTCLKMODE_SHIFT,
|
||||
OMAP3430_GR_MOD,
|
||||
OMAP3_PRM_CLKSRC_CTRL_OFFSET);
|
||||
|
||||
/* setup wakup source */
|
||||
prm_write_mod_reg(OMAP3430_EN_IO | OMAP3430_EN_GPIO1 |
|
||||
OMAP3430_EN_GPT1 | OMAP3430_EN_GPT12,
|
||||
WKUP_MOD, PM_WKEN);
|
||||
/* No need to write EN_IO, that is always enabled */
|
||||
prm_write_mod_reg(OMAP3430_EN_GPIO1 | OMAP3430_EN_GPT1 |
|
||||
OMAP3430_EN_GPT12,
|
||||
WKUP_MOD, OMAP3430_PM_MPUGRPSEL);
|
||||
/* For some reason IO doesn't generate wakeup event even if
|
||||
* it is selected to mpu wakeup goup */
|
||||
prm_write_mod_reg(OMAP3430_IO_EN | OMAP3430_WKUP_EN,
|
||||
OCP_MOD, OMAP3_PRM_IRQENABLE_MPU_OFFSET);
|
||||
}
|
||||
|
||||
static int __init pwrdms_setup(struct powerdomain *pwrdm)
|
||||
{
|
||||
struct power_state *pwrst;
|
||||
|
||||
if (!pwrdm->pwrsts)
|
||||
return 0;
|
||||
|
||||
pwrst = kmalloc(sizeof(struct power_state), GFP_KERNEL);
|
||||
if (!pwrst)
|
||||
return -ENOMEM;
|
||||
pwrst->pwrdm = pwrdm;
|
||||
pwrst->next_state = PWRDM_POWER_RET;
|
||||
list_add(&pwrst->node, &pwrst_list);
|
||||
|
||||
if (pwrdm_has_hdwr_sar(pwrdm))
|
||||
pwrdm_enable_hdwr_sar(pwrdm);
|
||||
|
||||
return set_pwrdm_state(pwrst->pwrdm, pwrst->next_state);
|
||||
}
|
||||
|
||||
/*
|
||||
* Enable hw supervised mode for all clockdomains if it's
|
||||
* supported. Initiate sleep transition for other clockdomains, if
|
||||
* they are not used
|
||||
*/
|
||||
static int __init clkdms_setup(struct clockdomain *clkdm)
|
||||
{
|
||||
if (clkdm->flags & CLKDM_CAN_ENABLE_AUTO)
|
||||
omap2_clkdm_allow_idle(clkdm);
|
||||
else if (clkdm->flags & CLKDM_CAN_FORCE_SLEEP &&
|
||||
atomic_read(&clkdm->usecount) == 0)
|
||||
omap2_clkdm_sleep(clkdm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int __init omap3_pm_init(void)
|
||||
{
|
||||
struct power_state *pwrst, *tmp;
|
||||
int ret;
|
||||
|
||||
if (!cpu_is_omap34xx())
|
||||
return -ENODEV;
|
||||
|
||||
printk(KERN_ERR "Power Management for TI OMAP3.\n");
|
||||
|
||||
/* XXX prcm_setup_regs needs to be before enabling hw
|
||||
* supervised mode for powerdomains */
|
||||
prcm_setup_regs();
|
||||
|
||||
ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
|
||||
(irq_handler_t)prcm_interrupt_handler,
|
||||
IRQF_DISABLED, "prcm", NULL);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "request_irq failed to register for 0x%x\n",
|
||||
INT_34XX_PRCM_MPU_IRQ);
|
||||
goto err1;
|
||||
}
|
||||
|
||||
ret = pwrdm_for_each(pwrdms_setup);
|
||||
if (ret) {
|
||||
printk(KERN_ERR "Failed to setup powerdomains\n");
|
||||
goto err2;
|
||||
}
|
||||
|
||||
(void) clkdm_for_each(clkdms_setup);
|
||||
|
||||
mpu_pwrdm = pwrdm_lookup("mpu_pwrdm");
|
||||
if (mpu_pwrdm == NULL) {
|
||||
printk(KERN_ERR "Failed to get mpu_pwrdm\n");
|
||||
goto err2;
|
||||
}
|
||||
|
||||
_omap_sram_idle = omap_sram_push(omap34xx_cpu_suspend,
|
||||
omap34xx_cpu_suspend_sz);
|
||||
|
||||
suspend_set_ops(&omap_pm_ops);
|
||||
|
||||
pm_idle = omap3_pm_idle;
|
||||
|
||||
err1:
|
||||
return ret;
|
||||
err2:
|
||||
free_irq(INT_34XX_PRCM_MPU_IRQ, NULL);
|
||||
list_for_each_entry_safe(pwrst, tmp, &pwrst_list, node) {
|
||||
list_del(&pwrst->node);
|
||||
kfree(pwrst);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
late_initcall(omap3_pm_init);
|
||||
@ -276,6 +276,8 @@
|
||||
/* CM_FCLKEN_WKUP, CM_ICLKEN_WKUP, PM_WKEN_WKUP shared bits */
|
||||
#define OMAP3430_EN_GPIO1 (1 << 3)
|
||||
#define OMAP3430_EN_GPIO1_SHIFT 3
|
||||
#define OMAP3430_EN_GPT12 (1 << 1)
|
||||
#define OMAP3430_EN_GPT12_SHIFT 1
|
||||
#define OMAP3430_EN_GPT1 (1 << 0)
|
||||
#define OMAP3430_EN_GPT1_SHIFT 0
|
||||
|
||||
|
||||
@ -60,9 +60,12 @@ struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r)
|
||||
{
|
||||
struct omap_sdrc_params *sp;
|
||||
|
||||
if (!sdrc_init_params)
|
||||
return NULL;
|
||||
|
||||
sp = sdrc_init_params;
|
||||
|
||||
while (sp->rate != r)
|
||||
while (sp->rate && sp->rate != r)
|
||||
sp++;
|
||||
|
||||
if (!sp->rate)
|
||||
|
||||
@ -28,7 +28,6 @@
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/assembler.h>
|
||||
#include <mach/io.h>
|
||||
#include <mach/pm.h>
|
||||
|
||||
#include <mach/omap24xx.h>
|
||||
|
||||
|
||||
436
arch/arm/mach-omap2/sleep34xx.S
Normal file
436
arch/arm/mach-omap2/sleep34xx.S
Normal file
@ -0,0 +1,436 @@
|
||||
/*
|
||||
* linux/arch/arm/mach-omap2/sleep.S
|
||||
*
|
||||
* (C) Copyright 2007
|
||||
* Texas Instruments
|
||||
* Karthik Dasu <karthik-dp@ti.com>
|
||||
*
|
||||
* (C) Copyright 2004
|
||||
* Texas Instruments, <www.ti.com>
|
||||
* Richard Woodruff <r-woodruff2@ti.com>
|
||||
*
|
||||
* 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 program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* 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., 59 Temple Place, Suite 330, Boston,
|
||||
* MA 02111-1307 USA
|
||||
*/
|
||||
#include <linux/linkage.h>
|
||||
#include <asm/assembler.h>
|
||||
#include <mach/io.h>
|
||||
#include <mach/control.h>
|
||||
|
||||
#include "prm.h"
|
||||
#include "sdrc.h"
|
||||
|
||||
#define PM_PREPWSTST_CORE_V OMAP34XX_PRM_REGADDR(CORE_MOD, \
|
||||
OMAP3430_PM_PREPWSTST)
|
||||
#define PM_PREPWSTST_MPU_V OMAP34XX_PRM_REGADDR(MPU_MOD, \
|
||||
OMAP3430_PM_PREPWSTST)
|
||||
#define PM_PWSTCTRL_MPU_P OMAP34XX_PRM_REGADDR(MPU_MOD, PM_PWSTCTRL)
|
||||
#define SCRATCHPAD_MEM_OFFS 0x310 /* Move this as correct place is
|
||||
* available */
|
||||
#define SCRATCHPAD_BASE_P OMAP343X_CTRL_REGADDR(\
|
||||
OMAP343X_CONTROL_MEM_WKUP +\
|
||||
SCRATCHPAD_MEM_OFFS)
|
||||
#define SDRC_POWER_V OMAP34XX_SDRC_REGADDR(SDRC_POWER)
|
||||
|
||||
.text
|
||||
/* Function call to get the restore pointer for resume from OFF */
|
||||
ENTRY(get_restore_pointer)
|
||||
stmfd sp!, {lr} @ save registers on stack
|
||||
adr r0, restore
|
||||
ldmfd sp!, {pc} @ restore regs and return
|
||||
ENTRY(get_restore_pointer_sz)
|
||||
.word . - get_restore_pointer_sz
|
||||
/*
|
||||
* Forces OMAP into idle state
|
||||
*
|
||||
* omap34xx_suspend() - This bit of code just executes the WFI
|
||||
* for normal idles.
|
||||
*
|
||||
* Note: This code get's copied to internal SRAM at boot. When the OMAP
|
||||
* wakes up it continues execution at the point it went to sleep.
|
||||
*/
|
||||
ENTRY(omap34xx_cpu_suspend)
|
||||
stmfd sp!, {r0-r12, lr} @ save registers on stack
|
||||
loop:
|
||||
/*b loop*/ @Enable to debug by stepping through code
|
||||
/* r0 contains restore pointer in sdram */
|
||||
/* r1 contains information about saving context */
|
||||
ldr r4, sdrc_power @ read the SDRC_POWER register
|
||||
ldr r5, [r4] @ read the contents of SDRC_POWER
|
||||
orr r5, r5, #0x40 @ enable self refresh on idle req
|
||||
str r5, [r4] @ write back to SDRC_POWER register
|
||||
|
||||
cmp r1, #0x0
|
||||
/* If context save is required, do that and execute wfi */
|
||||
bne save_context_wfi
|
||||
/* Data memory barrier and Data sync barrier */
|
||||
mov r1, #0
|
||||
mcr p15, 0, r1, c7, c10, 4
|
||||
mcr p15, 0, r1, c7, c10, 5
|
||||
|
||||
wfi @ wait for interrupt
|
||||
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
bl i_dll_wait
|
||||
|
||||
ldmfd sp!, {r0-r12, pc} @ restore regs and return
|
||||
restore:
|
||||
/* b restore*/ @ Enable to debug restore code
|
||||
/* Check what was the reason for mpu reset and store the reason in r9*/
|
||||
/* 1 - Only L1 and logic lost */
|
||||
/* 2 - Only L2 lost - In this case, we wont be here */
|
||||
/* 3 - Both L1 and L2 lost */
|
||||
ldr r1, pm_pwstctrl_mpu
|
||||
ldr r2, [r1]
|
||||
and r2, r2, #0x3
|
||||
cmp r2, #0x0 @ Check if target power state was OFF or RET
|
||||
moveq r9, #0x3 @ MPU OFF => L1 and L2 lost
|
||||
movne r9, #0x1 @ Only L1 and L2 lost => avoid L2 invalidation
|
||||
bne logic_l1_restore
|
||||
/* Execute smi to invalidate L2 cache */
|
||||
mov r12, #0x1 @ set up to invalide L2
|
||||
smi: .word 0xE1600070 @ Call SMI monitor (smieq)
|
||||
logic_l1_restore:
|
||||
mov r1, #0
|
||||
/* Invalidate all instruction caches to PoU
|
||||
* and flush branch target cache */
|
||||
mcr p15, 0, r1, c7, c5, 0
|
||||
|
||||
ldr r4, scratchpad_base
|
||||
ldr r3, [r4,#0xBC]
|
||||
ldmia r3!, {r4-r6}
|
||||
mov sp, r4
|
||||
msr spsr_cxsf, r5
|
||||
mov lr, r6
|
||||
|
||||
ldmia r3!, {r4-r9}
|
||||
/* Coprocessor access Control Register */
|
||||
mcr p15, 0, r4, c1, c0, 2
|
||||
|
||||
/* TTBR0 */
|
||||
MCR p15, 0, r5, c2, c0, 0
|
||||
/* TTBR1 */
|
||||
MCR p15, 0, r6, c2, c0, 1
|
||||
/* Translation table base control register */
|
||||
MCR p15, 0, r7, c2, c0, 2
|
||||
/*domain access Control Register */
|
||||
MCR p15, 0, r8, c3, c0, 0
|
||||
/* data fault status Register */
|
||||
MCR p15, 0, r9, c5, c0, 0
|
||||
|
||||
ldmia r3!,{r4-r8}
|
||||
/* instruction fault status Register */
|
||||
MCR p15, 0, r4, c5, c0, 1
|
||||
/*Data Auxiliary Fault Status Register */
|
||||
MCR p15, 0, r5, c5, c1, 0
|
||||
/*Instruction Auxiliary Fault Status Register*/
|
||||
MCR p15, 0, r6, c5, c1, 1
|
||||
/*Data Fault Address Register */
|
||||
MCR p15, 0, r7, c6, c0, 0
|
||||
/*Instruction Fault Address Register*/
|
||||
MCR p15, 0, r8, c6, c0, 2
|
||||
ldmia r3!,{r4-r7}
|
||||
|
||||
/* user r/w thread and process ID */
|
||||
MCR p15, 0, r4, c13, c0, 2
|
||||
/* user ro thread and process ID */
|
||||
MCR p15, 0, r5, c13, c0, 3
|
||||
/*Privileged only thread and process ID */
|
||||
MCR p15, 0, r6, c13, c0, 4
|
||||
/* cache size selection */
|
||||
MCR p15, 2, r7, c0, c0, 0
|
||||
ldmia r3!,{r4-r8}
|
||||
/* Data TLB lockdown registers */
|
||||
MCR p15, 0, r4, c10, c0, 0
|
||||
/* Instruction TLB lockdown registers */
|
||||
MCR p15, 0, r5, c10, c0, 1
|
||||
/* Secure or Nonsecure Vector Base Address */
|
||||
MCR p15, 0, r6, c12, c0, 0
|
||||
/* FCSE PID */
|
||||
MCR p15, 0, r7, c13, c0, 0
|
||||
/* Context PID */
|
||||
MCR p15, 0, r8, c13, c0, 1
|
||||
|
||||
ldmia r3!,{r4-r5}
|
||||
/* primary memory remap register */
|
||||
MCR p15, 0, r4, c10, c2, 0
|
||||
/*normal memory remap register */
|
||||
MCR p15, 0, r5, c10, c2, 1
|
||||
|
||||
/* Restore cpsr */
|
||||
ldmia r3!,{r4} /*load CPSR from SDRAM*/
|
||||
msr cpsr, r4 /*store cpsr */
|
||||
|
||||
/* Enabling MMU here */
|
||||
mrc p15, 0, r7, c2, c0, 2 /* Read TTBRControl */
|
||||
/* Extract N (0:2) bits and decide whether to use TTBR0 or TTBR1*/
|
||||
and r7, #0x7
|
||||
cmp r7, #0x0
|
||||
beq usettbr0
|
||||
ttbr_error:
|
||||
/* More work needs to be done to support N[0:2] value other than 0
|
||||
* So looping here so that the error can be detected
|
||||
*/
|
||||
b ttbr_error
|
||||
usettbr0:
|
||||
mrc p15, 0, r2, c2, c0, 0
|
||||
ldr r5, ttbrbit_mask
|
||||
and r2, r5
|
||||
mov r4, pc
|
||||
ldr r5, table_index_mask
|
||||
and r4, r5 /* r4 = 31 to 20 bits of pc */
|
||||
/* Extract the value to be written to table entry */
|
||||
ldr r1, table_entry
|
||||
add r1, r1, r4 /* r1 has value to be written to table entry*/
|
||||
/* Getting the address of table entry to modify */
|
||||
lsr r4, #18
|
||||
add r2, r4 /* r2 has the location which needs to be modified */
|
||||
/* Storing previous entry of location being modified */
|
||||
ldr r5, scratchpad_base
|
||||
ldr r4, [r2]
|
||||
str r4, [r5, #0xC0]
|
||||
/* Modify the table entry */
|
||||
str r1, [r2]
|
||||
/* Storing address of entry being modified
|
||||
* - will be restored after enabling MMU */
|
||||
ldr r5, scratchpad_base
|
||||
str r2, [r5, #0xC4]
|
||||
|
||||
mov r0, #0
|
||||
mcr p15, 0, r0, c7, c5, 4 @ Flush prefetch buffer
|
||||
mcr p15, 0, r0, c7, c5, 6 @ Invalidate branch predictor array
|
||||
mcr p15, 0, r0, c8, c5, 0 @ Invalidate instruction TLB
|
||||
mcr p15, 0, r0, c8, c6, 0 @ Invalidate data TLB
|
||||
/* Restore control register but dont enable caches here*/
|
||||
/* Caches will be enabled after restoring MMU table entry */
|
||||
ldmia r3!, {r4}
|
||||
/* Store previous value of control register in scratchpad */
|
||||
str r4, [r5, #0xC8]
|
||||
ldr r2, cache_pred_disable_mask
|
||||
and r4, r2
|
||||
mcr p15, 0, r4, c1, c0, 0
|
||||
|
||||
ldmfd sp!, {r0-r12, pc} @ restore regs and return
|
||||
save_context_wfi:
|
||||
/*b save_context_wfi*/ @ enable to debug save code
|
||||
mov r8, r0 /* Store SDRAM address in r8 */
|
||||
/* Check what that target sleep state is:stored in r1*/
|
||||
/* 1 - Only L1 and logic lost */
|
||||
/* 2 - Only L2 lost */
|
||||
/* 3 - Both L1 and L2 lost */
|
||||
cmp r1, #0x2 /* Only L2 lost */
|
||||
beq clean_l2
|
||||
cmp r1, #0x1 /* L2 retained */
|
||||
/* r9 stores whether to clean L2 or not*/
|
||||
moveq r9, #0x0 /* Dont Clean L2 */
|
||||
movne r9, #0x1 /* Clean L2 */
|
||||
l1_logic_lost:
|
||||
/* Store sp and spsr to SDRAM */
|
||||
mov r4, sp
|
||||
mrs r5, spsr
|
||||
mov r6, lr
|
||||
stmia r8!, {r4-r6}
|
||||
/* Save all ARM registers */
|
||||
/* Coprocessor access control register */
|
||||
mrc p15, 0, r6, c1, c0, 2
|
||||
stmia r8!, {r6}
|
||||
/* TTBR0, TTBR1 and Translation table base control */
|
||||
mrc p15, 0, r4, c2, c0, 0
|
||||
mrc p15, 0, r5, c2, c0, 1
|
||||
mrc p15, 0, r6, c2, c0, 2
|
||||
stmia r8!, {r4-r6}
|
||||
/* Domain access control register, data fault status register,
|
||||
and instruction fault status register */
|
||||
mrc p15, 0, r4, c3, c0, 0
|
||||
mrc p15, 0, r5, c5, c0, 0
|
||||
mrc p15, 0, r6, c5, c0, 1
|
||||
stmia r8!, {r4-r6}
|
||||
/* Data aux fault status register, instruction aux fault status,
|
||||
datat fault address register and instruction fault address register*/
|
||||
mrc p15, 0, r4, c5, c1, 0
|
||||
mrc p15, 0, r5, c5, c1, 1
|
||||
mrc p15, 0, r6, c6, c0, 0
|
||||
mrc p15, 0, r7, c6, c0, 2
|
||||
stmia r8!, {r4-r7}
|
||||
/* user r/w thread and process ID, user r/o thread and process ID,
|
||||
priv only thread and process ID, cache size selection */
|
||||
mrc p15, 0, r4, c13, c0, 2
|
||||
mrc p15, 0, r5, c13, c0, 3
|
||||
mrc p15, 0, r6, c13, c0, 4
|
||||
mrc p15, 2, r7, c0, c0, 0
|
||||
stmia r8!, {r4-r7}
|
||||
/* Data TLB lockdown, instruction TLB lockdown registers */
|
||||
mrc p15, 0, r5, c10, c0, 0
|
||||
mrc p15, 0, r6, c10, c0, 1
|
||||
stmia r8!, {r5-r6}
|
||||
/* Secure or non secure vector base address, FCSE PID, Context PID*/
|
||||
mrc p15, 0, r4, c12, c0, 0
|
||||
mrc p15, 0, r5, c13, c0, 0
|
||||
mrc p15, 0, r6, c13, c0, 1
|
||||
stmia r8!, {r4-r6}
|
||||
/* Primary remap, normal remap registers */
|
||||
mrc p15, 0, r4, c10, c2, 0
|
||||
mrc p15, 0, r5, c10, c2, 1
|
||||
stmia r8!,{r4-r5}
|
||||
|
||||
/* Store current cpsr*/
|
||||
mrs r2, cpsr
|
||||
stmia r8!, {r2}
|
||||
|
||||
mrc p15, 0, r4, c1, c0, 0
|
||||
/* save control register */
|
||||
stmia r8!, {r4}
|
||||
clean_caches:
|
||||
/* Clean Data or unified cache to POU*/
|
||||
/* How to invalidate only L1 cache???? - #FIX_ME# */
|
||||
/* mcr p15, 0, r11, c7, c11, 1 */
|
||||
cmp r9, #1 /* Check whether L2 inval is required or not*/
|
||||
bne skip_l2_inval
|
||||
clean_l2:
|
||||
/* read clidr */
|
||||
mrc p15, 1, r0, c0, c0, 1
|
||||
/* extract loc from clidr */
|
||||
ands r3, r0, #0x7000000
|
||||
/* left align loc bit field */
|
||||
mov r3, r3, lsr #23
|
||||
/* if loc is 0, then no need to clean */
|
||||
beq finished
|
||||
/* start clean at cache level 0 */
|
||||
mov r10, #0
|
||||
loop1:
|
||||
/* work out 3x current cache level */
|
||||
add r2, r10, r10, lsr #1
|
||||
/* extract cache type bits from clidr*/
|
||||
mov r1, r0, lsr r2
|
||||
/* mask of the bits for current cache only */
|
||||
and r1, r1, #7
|
||||
/* see what cache we have at this level */
|
||||
cmp r1, #2
|
||||
/* skip if no cache, or just i-cache */
|
||||
blt skip
|
||||
/* select current cache level in cssr */
|
||||
mcr p15, 2, r10, c0, c0, 0
|
||||
/* isb to sych the new cssr&csidr */
|
||||
isb
|
||||
/* read the new csidr */
|
||||
mrc p15, 1, r1, c0, c0, 0
|
||||
/* extract the length of the cache lines */
|
||||
and r2, r1, #7
|
||||
/* add 4 (line length offset) */
|
||||
add r2, r2, #4
|
||||
ldr r4, assoc_mask
|
||||
/* find maximum number on the way size */
|
||||
ands r4, r4, r1, lsr #3
|
||||
/* find bit position of way size increment */
|
||||
clz r5, r4
|
||||
ldr r7, numset_mask
|
||||
/* extract max number of the index size*/
|
||||
ands r7, r7, r1, lsr #13
|
||||
loop2:
|
||||
mov r9, r4
|
||||
/* create working copy of max way size*/
|
||||
loop3:
|
||||
/* factor way and cache number into r11 */
|
||||
orr r11, r10, r9, lsl r5
|
||||
/* factor index number into r11 */
|
||||
orr r11, r11, r7, lsl r2
|
||||
/*clean & invalidate by set/way */
|
||||
mcr p15, 0, r11, c7, c10, 2
|
||||
/* decrement the way*/
|
||||
subs r9, r9, #1
|
||||
bge loop3
|
||||
/*decrement the index */
|
||||
subs r7, r7, #1
|
||||
bge loop2
|
||||
skip:
|
||||
add r10, r10, #2
|
||||
/* increment cache number */
|
||||
cmp r3, r10
|
||||
bgt loop1
|
||||
finished:
|
||||
/*swith back to cache level 0 */
|
||||
mov r10, #0
|
||||
/* select current cache level in cssr */
|
||||
mcr p15, 2, r10, c0, c0, 0
|
||||
isb
|
||||
skip_l2_inval:
|
||||
/* Data memory barrier and Data sync barrier */
|
||||
mov r1, #0
|
||||
mcr p15, 0, r1, c7, c10, 4
|
||||
mcr p15, 0, r1, c7, c10, 5
|
||||
|
||||
wfi @ wait for interrupt
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
bl i_dll_wait
|
||||
/* restore regs and return */
|
||||
ldmfd sp!, {r0-r12, pc}
|
||||
|
||||
i_dll_wait:
|
||||
ldr r4, clk_stabilize_delay
|
||||
|
||||
i_dll_delay:
|
||||
subs r4, r4, #0x1
|
||||
bne i_dll_delay
|
||||
ldr r4, sdrc_power
|
||||
ldr r5, [r4]
|
||||
bic r5, r5, #0x40
|
||||
str r5, [r4]
|
||||
bx lr
|
||||
pm_prepwstst_core:
|
||||
.word PM_PREPWSTST_CORE_V
|
||||
pm_prepwstst_mpu:
|
||||
.word PM_PREPWSTST_MPU_V
|
||||
pm_pwstctrl_mpu:
|
||||
.word PM_PWSTCTRL_MPU_P
|
||||
scratchpad_base:
|
||||
.word SCRATCHPAD_BASE_P
|
||||
sdrc_power:
|
||||
.word SDRC_POWER_V
|
||||
context_mem:
|
||||
.word 0x803E3E14
|
||||
clk_stabilize_delay:
|
||||
.word 0x000001FF
|
||||
assoc_mask:
|
||||
.word 0x3ff
|
||||
numset_mask:
|
||||
.word 0x7fff
|
||||
ttbrbit_mask:
|
||||
.word 0xFFFFC000
|
||||
table_index_mask:
|
||||
.word 0xFFF00000
|
||||
table_entry:
|
||||
.word 0x00000C02
|
||||
cache_pred_disable_mask:
|
||||
.word 0xFFFFE7FB
|
||||
ENTRY(omap34xx_cpu_suspend_sz)
|
||||
.word . - omap34xx_cpu_suspend
|
||||
@ -28,7 +28,6 @@
|
||||
|
||||
#include <mach/hardware.h>
|
||||
#include <mach/irqs.h>
|
||||
#include <mach/pm.h>
|
||||
#include <mach/mux.h>
|
||||
#include <mach/usb.h>
|
||||
|
||||
|
||||
@ -171,7 +171,7 @@ endchoice
|
||||
|
||||
config OMAP_SERIAL_WAKE
|
||||
bool "Enable wake-up events for serial ports"
|
||||
depends on OMAP_MUX
|
||||
depends on ARCH_OMAP1 && OMAP_MUX
|
||||
default y
|
||||
help
|
||||
Select this option if you want to have your system wake up
|
||||
|
||||
@ -11,7 +11,6 @@
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/pm.h>
|
||||
#include <linux/console.h>
|
||||
#include <linux/serial.h>
|
||||
#include <linux/tty.h>
|
||||
|
||||
@ -39,7 +39,6 @@
|
||||
#include <mach/gpmc.h>
|
||||
#include <mach/onenand.h>
|
||||
#include <mach/gpio.h>
|
||||
#include <mach/pm.h>
|
||||
|
||||
#include <mach/dma.h>
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user