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OMAP3: PM: CORE domain off-mode support

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Add context save and restore for CORE powerdomain resources in order
to support off-mode.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Rajendra Nayak 2008-09-26 17:50:07 +05:30 committed by Kevin Hilman
parent 61255ab9e8
commit 2f5939c3ec
2 changed files with 73 additions and 1 deletions
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73
arch/arm/mach-omap2/pm34xx.c
View File

@ -5,6 +5,9 @@
* Tony Lindgren <tony@atomide.com>
* Jouni Hogander
*
* Copyright (C) 2007 Texas Instruments, Inc.
* Rajendra Nayak <rnayak@ti.com>
*
* Copyright (C) 2005 Texas Instruments, Inc.
* Richard Woodruff <r-woodruff2@ti.com>
*
@ -29,6 +32,8 @@
#include <plat/control.h>
#include <plat/serial.h>
#include <plat/sdrc.h>
#include <plat/prcm.h>
#include <plat/gpmc.h>
#include <asm/tlbflush.h>
@ -39,6 +44,11 @@
#include "prm.h"
#include "pm.h"
/* Scratchpad offsets */
#define OMAP343X_TABLE_ADDRESS_OFFSET 0x31
#define OMAP343X_TABLE_VALUE_OFFSET 0x30
#define OMAP343X_CONTROL_REG_VALUE_OFFSET 0x32
struct power_state {
struct powerdomain *pwrdm;
u32 next_state;
@ -57,6 +67,46 @@ static struct powerdomain *core_pwrdm, *per_pwrdm;
static int set_pwrdm_state(struct powerdomain *pwrdm, u32 state);
static inline void omap3_per_save_context(void)
{
omap_gpio_save_context();
}
static inline void omap3_per_restore_context(void)
{
omap_gpio_restore_context();
}
static void omap3_core_save_context(void)
{
u32 control_padconf_off;
/* Save the padconf registers */
control_padconf_off = omap_ctrl_readl(OMAP343X_CONTROL_PADCONF_OFF);
control_padconf_off |= START_PADCONF_SAVE;
omap_ctrl_writel(control_padconf_off, OMAP343X_CONTROL_PADCONF_OFF);
/* wait for the save to complete */
while (!omap_ctrl_readl(OMAP343X_CONTROL_GENERAL_PURPOSE_STATUS)
& PADCONF_SAVE_DONE)
;
/* Save the Interrupt controller context */
omap_intc_save_context();
/* Save the GPMC context */
omap3_gpmc_save_context();
/* Save the system control module context, padconf already save above*/
omap3_control_save_context();
}
static void omap3_core_restore_context(void)
{
/* Restore the control module context, padconf restored by h/w */
omap3_control_restore_context();
/* Restore the GPMC context */
omap3_gpmc_restore_context();
/* Restore the interrupt controller context */
omap_intc_restore_context();
}
/*
* PRCM Interrupt Handler Helper Function
*
@ -208,6 +258,7 @@ static void omap_sram_idle(void)
int mpu_next_state = PWRDM_POWER_ON;
int per_next_state = PWRDM_POWER_ON;
int core_next_state = PWRDM_POWER_ON;
int core_prev_state, per_prev_state;
if (!_omap_sram_idle)
return;
@ -246,8 +297,15 @@ static void omap_sram_idle(void)
omap_uart_prepare_idle(1);
/* PER changes only with core */
per_next_state = pwrdm_read_next_pwrst(per_pwrdm);
if (per_next_state < PWRDM_POWER_ON)
if (per_next_state < PWRDM_POWER_ON) {
omap_uart_prepare_idle(2);
if (per_next_state == PWRDM_POWER_OFF)
omap3_per_save_context();
}
if (core_next_state == PWRDM_POWER_OFF) {
omap3_core_save_context();
omap3_prcm_save_context();
}
/* Enable IO-PAD wakeup */
prm_set_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
}
@ -272,6 +330,18 @@ static void omap_sram_idle(void)
/* Disable IO-PAD wakeup */
prm_clear_mod_reg_bits(OMAP3430_EN_IO, WKUP_MOD, PM_WKEN);
core_prev_state = pwrdm_read_prev_pwrst(core_pwrdm);
if (core_prev_state == PWRDM_POWER_OFF) {
omap3_core_restore_context();
omap3_prcm_restore_context();
omap3_sram_restore_context();
}
if (per_next_state < PWRDM_POWER_ON) {
per_prev_state =
pwrdm_read_prev_pwrst(per_pwrdm);
if (per_prev_state == PWRDM_POWER_OFF)
omap3_per_restore_context();
}
omap2_gpio_resume_after_retention();
}
@ -843,6 +913,7 @@ static int __init omap3_pm_init(void)
/* XXX prcm_setup_regs needs to be before enabling hw
* supervised mode for powerdomains */
prcm_setup_regs();
omap3_save_scratchpad_contents();
ret = request_irq(INT_34XX_PRCM_MPU_IRQ,
(irq_handler_t)prcm_interrupt_handler,

1
arch/arm/plat-omap/include/plat/sram.h
View File

@ -27,6 +27,7 @@ extern u32 omap3_configure_core_dpll(
u32 sdrc_actim_ctrl_b_0, u32 sdrc_mr_0,
u32 sdrc_rfr_ctrl_1, u32 sdrc_actim_ctrl_a_1,
u32 sdrc_actim_ctrl_b_1, u32 sdrc_mr_1);
extern void omap3_sram_restore_context(void);
/* Do not use these */
extern void omap1_sram_reprogram_clock(u32 ckctl, u32 dpllctl);