Commit 2f5939c3 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Kevin Hilman
Browse files

OMAP3: PM: CORE domain off-mode support 



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

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
Signed-off-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
parent 61255ab9

arch/arm/mach-omap2/pm34xx.c

+72 −1
Original line number Diff line number Diff line
@@ -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,

arch/arm/plat-omap/include/plat/sram.h

+1 −0
Original line number Diff line number Diff line
@@ -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);