Commit 9b7fc907 authored by Rajendra Nayak's avatar Rajendra Nayak Committed by Paul Walmsley
Browse files

OMAP: powerdomain: Arch specific funcs for mem control 



Define the following architecture specific funtions for omap2/3/4
.pwrdm_set_mem_onst
.pwrdm_set_mem_retst
.pwrdm_read_mem_pwrst
.pwrdm_read_prev_mem_pwrst
.pwrdm_read_mem_retst
.pwrdm_clear_all_prev_pwrst
.pwrdm_enable_hdwr_sar
.pwrdm_disable_hdwr_sar
.pwrdm_wait_transition
.pwrdm_set_lowpwrstchange

Convert the platform-independent framework to call these functions.

Signed-off-by: default avatarRajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: rearranged Makefile changes]
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Cc: Benoit Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Reviewed-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
Tested-by: default avatarKevin Hilman <khilman@deeprootsystems.com>
Tested-by: default avatarSantosh Shilimkar <santosh.shilimkar@ti.com>
parent 12627578

arch/arm/mach-omap2/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -78,7 +78,7 @@ obj-$(CONFIG_ARCH_OMAP3) += prcm.o cm.o 
obj-$(CONFIG_ARCH_OMAP4)		+= prcm.o cm4xxx.o



# OMAP powerdomain framework

powerdomain-common			+= powerdomain.o powerdomains_data.o

powerdomain-common			+= powerdomain.o powerdomains_data.o powerdomain-common.o

obj-$(CONFIG_ARCH_OMAP2)		+= $(powerdomain-common) \

					   powerdomain2xxx_3xxx.o

obj-$(CONFIG_ARCH_OMAP3)		+= $(powerdomain-common) \

arch/arm/mach-omap2/powerdomain-common.c

0 → 100644
+111 −0
Original line number Diff line number Diff line 
/*

 *  linux/arch/arm/mach-omap2/powerdomain-common.c

 *  Contains common powerdomain framework functions

 *

 *  Copyright (C) 2010 Texas Instruments, Inc.

 *  Copyright (C) 2010 Nokia Corporation

 *

 * Derived from mach-omap2/powerdomain.c written by Paul Walmsley

 *

 * 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/errno.h>

#include <linux/kernel.h>

#include "pm.h"

#include "cm.h"

#include "cm-regbits-34xx.h"

#include "cm-regbits-44xx.h"

#include "prm-regbits-34xx.h"

#include "prm-regbits-44xx.h"

#include "powerdomains.h"



/*

 * OMAP3 and OMAP4 specific register bit initialisations

 * Notice that the names here are not according to each power

 * domain but the bit mapping used applies to all of them

 */

/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */

#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK

#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK

#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK

#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK

#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK



/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */

#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK

#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK

#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK

#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK

#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK



/* OMAP3 and OMAP4 Memory Status bits */

#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK

#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK

#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK

#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK

#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK



/* Common Internal functions used across OMAP rev's*/

u32 omap2_pwrdm_get_mem_bank_onstate_mask(u8 bank)

{

	switch (bank) {

	case 0:

		return OMAP_MEM0_ONSTATE_MASK;

	case 1:

		return OMAP_MEM1_ONSTATE_MASK;

	case 2:

		return OMAP_MEM2_ONSTATE_MASK;

	case 3:

		return OMAP_MEM3_ONSTATE_MASK;

	case 4:

		return OMAP_MEM4_ONSTATE_MASK;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	return 0;

}



u32 omap2_pwrdm_get_mem_bank_retst_mask(u8 bank)

{

	switch (bank) {

	case 0:

		return OMAP_MEM0_RETSTATE_MASK;

	case 1:

		return OMAP_MEM1_RETSTATE_MASK;

	case 2:

		return OMAP_MEM2_RETSTATE_MASK;

	case 3:

		return OMAP_MEM3_RETSTATE_MASK;

	case 4:

		return OMAP_MEM4_RETSTATE_MASK;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	return 0;

}



u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank)

{

	switch (bank) {

	case 0:

		return OMAP_MEM0_STATEST_MASK;

	case 1:

		return OMAP_MEM1_STATEST_MASK;

	case 2:

		return OMAP_MEM2_STATEST_MASK;

	case 3:

		return OMAP_MEM3_STATEST_MASK;

	case 4:

		return OMAP_MEM4_STATEST_MASK;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	return 0;

}

arch/arm/mach-omap2/powerdomain.c

+56 −247
Original line number Diff line number Diff line
@@ -15,23 +15,10 @@ 
#undef DEBUG



#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/types.h>

#include <linux/delay.h>

#include <linux/spinlock.h>

#include <linux/list.h>

#include <linux/errno.h>

#include <linux/err.h>

#include <linux/io.h>



#include <asm/atomic.h>



#include "cm.h"

#include "cm-regbits-34xx.h"

#include "cm-regbits-44xx.h"

#include "prm.h"

#include "prm-regbits-34xx.h"

#include "prm-regbits-44xx.h"

#include <linux/string.h>



#include <plat/cpu.h>

#include <plat/powerdomain.h>
@@ -45,37 +32,6 @@ enum { 
	PWRDM_STATE_PREV,

};



/* Variable holding value of the CPU dependent PWRSTCTRL Register Offset */

static u16 pwrstctrl_reg_offs;



/* Variable holding value of the CPU dependent PWRSTST Register Offset */

static u16 pwrstst_reg_offs;



/* OMAP3 and OMAP4 specific register bit initialisations

 * Notice that the names here are not according to each power

 * domain but the bit mapping used applies to all of them

 */



/* OMAP3 and OMAP4 Memory Onstate Masks (common across all power domains) */

#define OMAP_MEM0_ONSTATE_MASK OMAP3430_SHAREDL1CACHEFLATONSTATE_MASK

#define OMAP_MEM1_ONSTATE_MASK OMAP3430_L1FLATMEMONSTATE_MASK

#define OMAP_MEM2_ONSTATE_MASK OMAP3430_SHAREDL2CACHEFLATONSTATE_MASK

#define OMAP_MEM3_ONSTATE_MASK OMAP3430_L2FLATMEMONSTATE_MASK

#define OMAP_MEM4_ONSTATE_MASK OMAP4430_OCP_NRET_BANK_ONSTATE_MASK



/* OMAP3 and OMAP4 Memory Retstate Masks (common across all power domains) */

#define OMAP_MEM0_RETSTATE_MASK OMAP3430_SHAREDL1CACHEFLATRETSTATE_MASK

#define OMAP_MEM1_RETSTATE_MASK OMAP3430_L1FLATMEMRETSTATE_MASK

#define OMAP_MEM2_RETSTATE_MASK OMAP3430_SHAREDL2CACHEFLATRETSTATE_MASK

#define OMAP_MEM3_RETSTATE_MASK OMAP3430_L2FLATMEMRETSTATE_MASK

#define OMAP_MEM4_RETSTATE_MASK OMAP4430_OCP_NRET_BANK_RETSTATE_MASK



/* OMAP3 and OMAP4 Memory Status bits */

#define OMAP_MEM0_STATEST_MASK OMAP3430_SHAREDL1CACHEFLATSTATEST_MASK

#define OMAP_MEM1_STATEST_MASK OMAP3430_L1FLATMEMSTATEST_MASK

#define OMAP_MEM2_STATEST_MASK OMAP3430_SHAREDL2CACHEFLATSTATEST_MASK

#define OMAP_MEM3_STATEST_MASK OMAP3430_L2FLATMEMSTATEST_MASK

#define OMAP_MEM4_STATEST_MASK OMAP4430_OCP_NRET_BANK_STATEST_MASK



/* pwrdm_list contains all registered struct powerdomains */

static LIST_HEAD(pwrdm_list);
@@ -225,18 +181,6 @@ void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs) 
{

	struct powerdomain **p = NULL;



	if (cpu_is_omap24xx() || cpu_is_omap34xx()) {

		pwrstctrl_reg_offs = OMAP2_PM_PWSTCTRL;

		pwrstst_reg_offs = OMAP2_PM_PWSTST;

	} else if (cpu_is_omap44xx()) {

		pwrstctrl_reg_offs = OMAP4_PM_PWSTCTRL;

		pwrstst_reg_offs = OMAP4_PM_PWSTST;

	} else {

		printk(KERN_ERR "Power Domain struct not supported for " \

							"this CPU\n");

		return;

	}



	if (!custom_funcs)

		WARN(1, "powerdomain: No custom pwrdm functions registered\n");

	else
@@ -566,7 +510,7 @@ int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) 
 */

int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)

{

	u32 m;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;
@@ -580,37 +524,10 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) 
	pr_debug("powerdomain: setting next memory powerstate for domain %s "

		 "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst);



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP_MEM0_ONSTATE_MASK;

		break;

	case 1:

		m = OMAP_MEM1_ONSTATE_MASK;

		break;

	case 2:

		m = OMAP_MEM2_ONSTATE_MASK;

		break;

	case 3:

		m = OMAP_MEM3_ONSTATE_MASK;

		break;

	case 4:

		m = OMAP_MEM4_ONSTATE_MASK;

		break;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)),

			     pwrdm->prcm_offs, pwrstctrl_reg_offs);

	if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst)

		ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst);



	return 0;

	return ret;

}



/**
@@ -631,7 +548,7 @@ int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) 
 */

int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)

{

	u32 m;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;
@@ -645,37 +562,10 @@ int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst) 
	pr_debug("powerdomain: setting next memory powerstate for domain %s "

		 "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst);



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP_MEM0_RETSTATE_MASK;

		break;

	case 1:

		m = OMAP_MEM1_RETSTATE_MASK;

		break;

	case 2:

		m = OMAP_MEM2_RETSTATE_MASK;

		break;

	case 3:

		m = OMAP_MEM3_RETSTATE_MASK;

		break;

	case 4:

		m = OMAP_MEM4_RETSTATE_MASK;

		break;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,

			     pwrstctrl_reg_offs);

	if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst)

		ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst);



	return 0;

	return ret;

}



/**
@@ -754,46 +644,21 @@ int pwrdm_read_logic_retst(struct powerdomain *pwrdm) 
 */

int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	if (pwrdm->banks < (bank + 1))

		return -EEXIST;

		return ret;



	if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)

		bank = 1;



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP_MEM0_STATEST_MASK;

		break;

	case 1:

		m = OMAP_MEM1_STATEST_MASK;

		break;

	case 2:

		m = OMAP_MEM2_STATEST_MASK;

		break;

	case 3:

		m = OMAP_MEM3_STATEST_MASK;

		break;

	case 4:

		m = OMAP_MEM4_STATEST_MASK;

		break;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst)

		ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs,

					 pwrstst_reg_offs, m);

	return ret;

}



/**
@@ -809,43 +674,21 @@ int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank) 
 */

int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	if (pwrdm->banks < (bank + 1))

		return -EEXIST;

		return ret;



	if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)

		bank = 1;



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP3430_LASTMEM1STATEENTERED_MASK;

		break;

	case 1:

		m = OMAP3430_LASTMEM2STATEENTERED_MASK;

		break;

	case 2:

		m = OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK;

		break;

	case 3:

		m = OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK;

		break;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst)

		ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs,

					OMAP3430_PM_PREPWSTST, m);

	return ret;

}



/**
@@ -860,43 +703,18 @@ int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank) 
 */

int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	if (pwrdm->banks < (bank + 1))

		return -EEXIST;

		return ret;



	/*

	 * The register bit names below may not correspond to the

	 * actual names of the bits in each powerdomain's register,

	 * but the type of value returned is the same for each

	 * powerdomain.

	 */

	switch (bank) {

	case 0:

		m = OMAP_MEM0_RETSTATE_MASK;

		break;

	case 1:

		m = OMAP_MEM1_RETSTATE_MASK;

		break;

	case 2:

		m = OMAP_MEM2_RETSTATE_MASK;

		break;

	case 3:

		m = OMAP_MEM3_RETSTATE_MASK;

		break;

	case 4:

		m = OMAP_MEM4_RETSTATE_MASK;

		break;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst)

		ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs,

					pwrstctrl_reg_offs, m);

	return ret;

}



/**
@@ -910,8 +728,10 @@ int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank) 
 */

int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)

{

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	/*

	 * XXX should get the powerdomain's current state here;
@@ -921,9 +741,10 @@ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) 
	pr_debug("powerdomain: clearing previous power state reg for %s\n",

		 pwrdm->name);



	prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST);

	if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst)

		ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm);



	return 0;

	return ret;

}



/**
@@ -939,19 +760,21 @@ int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm) 
 */

int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)

{

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))

		return -EINVAL;

		return ret;



	pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n",

		 pwrdm->name);



	prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,

			     pwrdm->prcm_offs, pwrstctrl_reg_offs);

	if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar)

		ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm);



	return 0;

	return ret;

}



/**
@@ -967,19 +790,21 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm) 
 */

int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)

{

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;

		return ret;



	if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))

		return -EINVAL;

		return ret;



	pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n",

		 pwrdm->name);



	prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0,

			     pwrdm->prcm_offs, pwrstctrl_reg_offs);

	if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar)

		ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm);



	return 0;

	return ret;

}



/**
@@ -1006,6 +831,8 @@ bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm) 
 */

int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)

{

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;
@@ -1015,11 +842,10 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) 
	pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",

		 pwrdm->name);



	prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,

			     (1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),

			     pwrdm->prcm_offs, pwrstctrl_reg_offs);

	if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange)

		ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm);



	return 0;

	return ret;

}



/**
@@ -1034,32 +860,15 @@ int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm) 
 */

int pwrdm_wait_transition(struct powerdomain *pwrdm)

{

	u32 c = 0;

	int ret = -EINVAL;



	if (!pwrdm)

		return -EINVAL;



	/*

	 * REVISIT: pwrdm_wait_transition() may be better implemented

	 * via a callback and a periodic timer check -- how long do we expect

	 * powerdomain transitions to take?

	 */



	/* XXX Is this udelay() value meaningful? */

	while ((prm_read_mod_reg(pwrdm->prcm_offs, pwrstst_reg_offs) &

		OMAP_INTRANSITION_MASK) &&

	       (c++ < PWRDM_TRANSITION_BAILOUT))

			udelay(1);



	if (c > PWRDM_TRANSITION_BAILOUT) {

		printk(KERN_ERR "powerdomain: waited too long for "

		       "powerdomain %s to complete transition\n", pwrdm->name);

		return -EAGAIN;

	}

	if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition)

		ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);



	pr_debug("powerdomain: completed transition in %d loops\n", c);



	return 0;

	return ret;

}



int pwrdm_state_switch(struct powerdomain *pwrdm)

arch/arm/mach-omap2/powerdomain2xxx_3xxx.c

+131 −0
Original line number Diff line number Diff line
@@ -41,6 +41,50 @@ static int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm) 
				OMAP2_PM_PWSTST, OMAP_POWERSTATEST_MASK);

}



static int omap2_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,

								u8 pwrst)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,

				OMAP2_PM_PWSTCTRL);



	return 0;

}



static int omap2_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,

								u8 pwrst)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,

				OMAP2_PM_PWSTCTRL);



	return 0;

}



static int omap2_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_stst_mask(bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTST, m);

}



static int omap2_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL, m);

}



static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)

{

	u32 v;
@@ -52,6 +96,33 @@ static int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) 
	return 0;

}



static int omap2_pwrdm_wait_transition(struct powerdomain *pwrdm)

{

	u32 c = 0;



	/*

	 * REVISIT: pwrdm_wait_transition() may be better implemented

	 * via a callback and a periodic timer check -- how long do we expect

	 * powerdomain transitions to take?

	 */



	/* XXX Is this udelay() value meaningful? */

	while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP2_PM_PWSTST) &

		OMAP_INTRANSITION_MASK) &&

		(c++ < PWRDM_TRANSITION_BAILOUT))

			udelay(1);



	if (c > PWRDM_TRANSITION_BAILOUT) {

		printk(KERN_ERR "powerdomain: waited too long for "

			"powerdomain %s to complete transition\n", pwrdm->name);

		return -EAGAIN;

	}



	pr_debug("powerdomain: completed transition in %d loops\n", c);



	return 0;

}



/* Applicable only for OMAP3. Not supported on OMAP2 */

static int omap3_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)

{
@@ -77,11 +148,62 @@ static int omap3_pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm) 
				OMAP3430_LASTLOGICSTATEENTERED_MASK);

}



static int omap3_get_mem_bank_lastmemst_mask(u8 bank)

{

	switch (bank) {

	case 0:

		return OMAP3430_LASTMEM1STATEENTERED_MASK;

	case 1:

		return OMAP3430_LASTMEM2STATEENTERED_MASK;

	case 2:

		return OMAP3430_LASTSHAREDL2CACHEFLATSTATEENTERED_MASK;

	case 3:

		return OMAP3430_LASTL2FLATMEMSTATEENTERED_MASK;

	default:

		WARN_ON(1); /* should never happen */

		return -EEXIST;

	}

	return 0;

}



static int omap3_pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	m = omap3_get_mem_bank_lastmemst_mask(bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs,

				OMAP3430_PM_PREPWSTST, m);

}



static int omap3_pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)

{

	prm_write_mod_reg(0, pwrdm->prcm_offs, OMAP3430_PM_PREPWSTST);

	return 0;

}



static int omap3_pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)

{

	return prm_rmw_mod_reg_bits(0, 1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT,

				pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);

}



static int omap3_pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)

{

	return prm_rmw_mod_reg_bits(1 << OMAP3430ES2_SAVEANDRESTORE_SHIFT, 0,

				pwrdm->prcm_offs, OMAP2_PM_PWSTCTRL);

}



struct pwrdm_ops omap2_pwrdm_operations = {

	.pwrdm_set_next_pwrst	= omap2_pwrdm_set_next_pwrst,

	.pwrdm_read_next_pwrst	= omap2_pwrdm_read_next_pwrst,

	.pwrdm_read_pwrst	= omap2_pwrdm_read_pwrst,

	.pwrdm_set_logic_retst	= omap2_pwrdm_set_logic_retst,

	.pwrdm_set_mem_onst	= omap2_pwrdm_set_mem_onst,

	.pwrdm_set_mem_retst	= omap2_pwrdm_set_mem_retst,

	.pwrdm_read_mem_pwrst	= omap2_pwrdm_read_mem_pwrst,

	.pwrdm_read_mem_retst	= omap2_pwrdm_read_mem_retst,

	.pwrdm_wait_transition	= omap2_pwrdm_wait_transition,

};



struct pwrdm_ops omap3_pwrdm_operations = {
@@ -93,4 +215,13 @@ struct pwrdm_ops omap3_pwrdm_operations = { 
	.pwrdm_read_logic_pwrst	= omap3_pwrdm_read_logic_pwrst,

	.pwrdm_read_logic_retst	= omap3_pwrdm_read_logic_retst,

	.pwrdm_read_prev_logic_pwrst	= omap3_pwrdm_read_prev_logic_pwrst,

	.pwrdm_set_mem_onst	= omap2_pwrdm_set_mem_onst,

	.pwrdm_set_mem_retst	= omap2_pwrdm_set_mem_retst,

	.pwrdm_read_mem_pwrst	= omap2_pwrdm_read_mem_pwrst,

	.pwrdm_read_mem_retst	= omap2_pwrdm_read_mem_retst,

	.pwrdm_read_prev_mem_pwrst	= omap3_pwrdm_read_prev_mem_pwrst,

	.pwrdm_clear_all_prev_pwrst	= omap3_pwrdm_clear_all_prev_pwrst,

	.pwrdm_enable_hdwr_sar	= omap3_pwrdm_enable_hdwr_sar,

	.pwrdm_disable_hdwr_sar	= omap3_pwrdm_disable_hdwr_sar,

	.pwrdm_wait_transition	= omap2_pwrdm_wait_transition,

};

arch/arm/mach-omap2/powerdomain44xx.c

+85 −0
Original line number Diff line number Diff line
@@ -47,6 +47,14 @@ static int omap4_pwrdm_read_prev_pwrst(struct powerdomain *pwrdm) 
				OMAP4430_LASTPOWERSTATEENTERED_MASK);

}



static int omap4_pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)

{

	prm_rmw_mod_reg_bits(OMAP4430_LOWPOWERSTATECHANGE_MASK,

				(1 << OMAP4430_LOWPOWERSTATECHANGE_SHIFT),

				pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL);

	return 0;

}



static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)

{

	u32 v;
@@ -58,6 +66,32 @@ static int omap4_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst) 
	return 0;

}



static int omap4_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,

								u8 pwrst)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_onstate_mask(bank);



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,

				OMAP4_PM_PWSTCTRL);



	return 0;

}



static int omap4_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,

								u8 pwrst)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);



	prm_rmw_mod_reg_bits(m, (pwrst << __ffs(m)), pwrdm->prcm_offs,

				OMAP4_PM_PWSTCTRL);



	return 0;

}



static int omap4_pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)

{

	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST,
@@ -70,12 +104,63 @@ static int omap4_pwrdm_read_logic_retst(struct powerdomain *pwrdm) 
				OMAP4430_LOGICRETSTATE_MASK);

}



static int omap4_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_stst_mask(bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTST, m);

}



static int omap4_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)

{

	u32 m;



	m = omap2_pwrdm_get_mem_bank_retst_mask(bank);



	return prm_read_mod_bits_shift(pwrdm->prcm_offs, OMAP4_PM_PWSTCTRL, m);

}



static int omap4_pwrdm_wait_transition(struct powerdomain *pwrdm)

{

	u32 c = 0;



	/*

	 * REVISIT: pwrdm_wait_transition() may be better implemented

	 * via a callback and a periodic timer check -- how long do we expect

	 * powerdomain transitions to take?

	 */



	/* XXX Is this udelay() value meaningful? */

	while ((prm_read_mod_reg(pwrdm->prcm_offs, OMAP4_PM_PWSTST) &

		OMAP_INTRANSITION_MASK) &&

		(c++ < PWRDM_TRANSITION_BAILOUT))

			udelay(1);



	if (c > PWRDM_TRANSITION_BAILOUT) {

		printk(KERN_ERR "powerdomain: waited too long for "

			"powerdomain %s to complete transition\n", pwrdm->name);

		return -EAGAIN;

	}



	pr_debug("powerdomain: completed transition in %d loops\n", c);



	return 0;

}



struct pwrdm_ops omap4_pwrdm_operations = {

	.pwrdm_set_next_pwrst	= omap4_pwrdm_set_next_pwrst,

	.pwrdm_read_next_pwrst	= omap4_pwrdm_read_next_pwrst,

	.pwrdm_read_pwrst	= omap4_pwrdm_read_pwrst,

	.pwrdm_read_prev_pwrst	= omap4_pwrdm_read_prev_pwrst,

	.pwrdm_set_lowpwrstchange	= omap4_pwrdm_set_lowpwrstchange,

	.pwrdm_set_logic_retst	= omap4_pwrdm_set_logic_retst,

	.pwrdm_read_logic_pwrst	= omap4_pwrdm_read_logic_pwrst,

	.pwrdm_read_logic_retst	= omap4_pwrdm_read_logic_retst,

	.pwrdm_read_mem_pwrst	= omap4_pwrdm_read_mem_pwrst,

	.pwrdm_read_mem_retst	= omap4_pwrdm_read_mem_retst,

	.pwrdm_set_mem_onst	= omap4_pwrdm_set_mem_onst,

	.pwrdm_set_mem_retst	= omap4_pwrdm_set_mem_retst,

	.pwrdm_wait_transition	= omap4_pwrdm_wait_transition,

};

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