038b0a6d8d
kbuild explicitly includes this at build time. Signed-off-by: Dave Jones <davej@redhat.com>
299 lines
9 KiB
C
299 lines
9 KiB
C
/*
|
|
* linux/arch/arm/mach-omap2/pm-domain.c
|
|
*
|
|
* Power domain functions for OMAP2
|
|
*
|
|
* Copyright (C) 2006 Nokia Corporation
|
|
* Tony Lindgren <tony@atomide.com>
|
|
*
|
|
* Some code based on earlier OMAP2 sample PM code
|
|
* Copyright (C) 2005 Texas Instruments, Inc.
|
|
* 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 version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/clk.h>
|
|
|
|
#include <asm/io.h>
|
|
|
|
#include "prcm-regs.h"
|
|
|
|
/* Power domain offsets */
|
|
#define PM_MPU_OFFSET 0x100
|
|
#define PM_CORE_OFFSET 0x200
|
|
#define PM_GFX_OFFSET 0x300
|
|
#define PM_WKUP_OFFSET 0x400 /* Autoidle only */
|
|
#define PM_PLL_OFFSET 0x500 /* Autoidle only */
|
|
#define PM_DSP_OFFSET 0x800
|
|
#define PM_MDM_OFFSET 0xc00
|
|
|
|
/* Power domain wake-up dependency control register */
|
|
#define PM_WKDEP_OFFSET 0xc8
|
|
#define EN_MDM (1 << 5)
|
|
#define EN_WKUP (1 << 4)
|
|
#define EN_GFX (1 << 3)
|
|
#define EN_DSP (1 << 2)
|
|
#define EN_MPU (1 << 1)
|
|
#define EN_CORE (1 << 0)
|
|
|
|
/* Core power domain state transition control register */
|
|
#define PM_PWSTCTRL_OFFSET 0xe0
|
|
#define FORCESTATE (1 << 18) /* Only for DSP & GFX */
|
|
#define MEM4RETSTATE (1 << 6)
|
|
#define MEM3RETSTATE (1 << 5)
|
|
#define MEM2RETSTATE (1 << 4)
|
|
#define MEM1RETSTATE (1 << 3)
|
|
#define LOGICRETSTATE (1 << 2) /* Logic is retained */
|
|
#define POWERSTATE_OFF 0x3
|
|
#define POWERSTATE_RETENTION 0x1
|
|
#define POWERSTATE_ON 0x0
|
|
|
|
/* Power domain state register */
|
|
#define PM_PWSTST_OFFSET 0xe4
|
|
|
|
/* Hardware supervised state transition control register */
|
|
#define CM_CLKSTCTRL_OFFSET 0x48
|
|
#define AUTOSTAT_MPU (1 << 0) /* MPU */
|
|
#define AUTOSTAT_DSS (1 << 2) /* Core */
|
|
#define AUTOSTAT_L4 (1 << 1) /* Core */
|
|
#define AUTOSTAT_L3 (1 << 0) /* Core */
|
|
#define AUTOSTAT_GFX (1 << 0) /* GFX */
|
|
#define AUTOSTAT_IVA (1 << 8) /* 2420 IVA in DSP domain */
|
|
#define AUTOSTAT_DSP (1 << 0) /* DSP */
|
|
#define AUTOSTAT_MDM (1 << 0) /* MDM */
|
|
|
|
/* Automatic control of interface clock idling */
|
|
#define CM_AUTOIDLE1_OFFSET 0x30
|
|
#define CM_AUTOIDLE2_OFFSET 0x34 /* Core only */
|
|
#define CM_AUTOIDLE3_OFFSET 0x38 /* Core only */
|
|
#define CM_AUTOIDLE4_OFFSET 0x3c /* Core only */
|
|
#define AUTO_54M(x) (((x) & 0x3) << 6)
|
|
#define AUTO_96M(x) (((x) & 0x3) << 2)
|
|
#define AUTO_DPLL(x) (((x) & 0x3) << 0)
|
|
#define AUTO_STOPPED 0x3
|
|
#define AUTO_BYPASS_FAST 0x2 /* DPLL only */
|
|
#define AUTO_BYPASS_LOW_POWER 0x1 /* DPLL only */
|
|
#define AUTO_DISABLED 0x0
|
|
|
|
/* Voltage control PRCM_VOLTCTRL bits */
|
|
#define AUTO_EXTVOLT (1 << 15)
|
|
#define FORCE_EXTVOLT (1 << 14)
|
|
#define SETOFF_LEVEL(x) (((x) & 0x3) << 12)
|
|
#define MEMRETCTRL (1 << 8)
|
|
#define SETRET_LEVEL(x) (((x) & 0x3) << 6)
|
|
#define VOLT_LEVEL(x) (((x) & 0x3) << 0)
|
|
|
|
#define OMAP24XX_PRCM_VBASE IO_ADDRESS(OMAP24XX_PRCM_BASE)
|
|
#define prcm_readl(r) __raw_readl(OMAP24XX_PRCM_VBASE + (r))
|
|
#define prcm_writel(v, r) __raw_writel((v), OMAP24XX_PRCM_VBASE + (r))
|
|
|
|
static u32 pmdomain_get_wakeup_dependencies(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + PM_WKDEP_OFFSET);
|
|
}
|
|
|
|
static void pmdomain_set_wakeup_dependencies(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, domain_offset + PM_WKDEP_OFFSET);
|
|
}
|
|
|
|
static u32 pmdomain_get_powerstate(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + PM_PWSTCTRL_OFFSET);
|
|
}
|
|
|
|
static void pmdomain_set_powerstate(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, domain_offset + PM_PWSTCTRL_OFFSET);
|
|
}
|
|
|
|
static u32 pmdomain_get_clock_autocontrol(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + CM_CLKSTCTRL_OFFSET);
|
|
}
|
|
|
|
static void pmdomain_set_clock_autocontrol(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, domain_offset + CM_CLKSTCTRL_OFFSET);
|
|
}
|
|
|
|
static u32 pmdomain_get_clock_autoidle1(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + CM_AUTOIDLE1_OFFSET);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static u32 pmdomain_get_clock_autoidle2(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + CM_AUTOIDLE2_OFFSET);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static u32 pmdomain_get_clock_autoidle3(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + CM_AUTOIDLE3_OFFSET);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static u32 pmdomain_get_clock_autoidle4(int domain_offset)
|
|
{
|
|
return prcm_readl(domain_offset + CM_AUTOIDLE4_OFFSET);
|
|
}
|
|
|
|
static void pmdomain_set_clock_autoidle1(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, CM_AUTOIDLE1_OFFSET + domain_offset);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static void pmdomain_set_clock_autoidle2(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, CM_AUTOIDLE2_OFFSET + domain_offset);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static void pmdomain_set_clock_autoidle3(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, CM_AUTOIDLE3_OFFSET + domain_offset);
|
|
}
|
|
|
|
/* Core domain only */
|
|
static void pmdomain_set_clock_autoidle4(u32 state, int domain_offset)
|
|
{
|
|
prcm_writel(state, CM_AUTOIDLE4_OFFSET + domain_offset);
|
|
}
|
|
|
|
/*
|
|
* Configures power management domains to idle clocks automatically.
|
|
*/
|
|
void pmdomain_set_autoidle(void)
|
|
{
|
|
u32 val;
|
|
|
|
/* Set PLL auto stop for 54M, 96M & DPLL */
|
|
pmdomain_set_clock_autoidle1(AUTO_54M(AUTO_STOPPED) |
|
|
AUTO_96M(AUTO_STOPPED) |
|
|
AUTO_DPLL(AUTO_STOPPED), PM_PLL_OFFSET);
|
|
|
|
/* External clock input control
|
|
* REVISIT: Should this be in clock framework?
|
|
*/
|
|
PRCM_CLKSRC_CTRL |= (0x3 << 3);
|
|
|
|
/* Configure number of 32KHz clock cycles for sys_clk */
|
|
PRCM_CLKSSETUP = 0x00ff;
|
|
|
|
/* Configure automatic voltage transition */
|
|
PRCM_VOLTSETUP = 0;
|
|
val = PRCM_VOLTCTRL;
|
|
val &= ~(SETOFF_LEVEL(0x3) | VOLT_LEVEL(0x3));
|
|
val |= SETOFF_LEVEL(1) | VOLT_LEVEL(1) | AUTO_EXTVOLT;
|
|
PRCM_VOLTCTRL = val;
|
|
|
|
/* Disable emulation tools functional clock */
|
|
PRCM_CLKEMUL_CTRL = 0x0;
|
|
|
|
/* Set core memory retention state */
|
|
val = pmdomain_get_powerstate(PM_CORE_OFFSET);
|
|
if (cpu_is_omap2420()) {
|
|
val &= ~(0x7 << 3);
|
|
val |= (MEM3RETSTATE | MEM2RETSTATE | MEM1RETSTATE);
|
|
} else {
|
|
val &= ~(0xf << 3);
|
|
val |= (MEM4RETSTATE | MEM3RETSTATE | MEM2RETSTATE |
|
|
MEM1RETSTATE);
|
|
}
|
|
pmdomain_set_powerstate(val, PM_CORE_OFFSET);
|
|
|
|
/* OCP interface smart idle. REVISIT: Enable autoidle bit0 ? */
|
|
val = SMS_SYSCONFIG;
|
|
val &= ~(0x3 << 3);
|
|
val |= (0x2 << 3) | (1 << 0);
|
|
SMS_SYSCONFIG |= val;
|
|
|
|
val = SDRC_SYSCONFIG;
|
|
val &= ~(0x3 << 3);
|
|
val |= (0x2 << 3);
|
|
SDRC_SYSCONFIG = val;
|
|
|
|
/* Configure L3 interface for smart idle.
|
|
* REVISIT: Enable autoidle bit0 ?
|
|
*/
|
|
val = GPMC_SYSCONFIG;
|
|
val &= ~(0x3 << 3);
|
|
val |= (0x2 << 3) | (1 << 0);
|
|
GPMC_SYSCONFIG = val;
|
|
|
|
pmdomain_set_powerstate(LOGICRETSTATE | POWERSTATE_RETENTION,
|
|
PM_MPU_OFFSET);
|
|
pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_CORE_OFFSET);
|
|
if (!cpu_is_omap2420())
|
|
pmdomain_set_powerstate(POWERSTATE_RETENTION, PM_MDM_OFFSET);
|
|
|
|
/* Assume suspend function has saved the state for DSP and GFX */
|
|
pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_DSP_OFFSET);
|
|
pmdomain_set_powerstate(FORCESTATE | POWERSTATE_OFF, PM_GFX_OFFSET);
|
|
|
|
#if 0
|
|
/* REVISIT: Internal USB needs special handling */
|
|
force_standby_usb();
|
|
if (cpu_is_omap2430())
|
|
force_hsmmc();
|
|
sdram_self_refresh_on_idle_req(1);
|
|
#endif
|
|
|
|
/* Enable clock auto control for all domains.
|
|
* Note that CORE domain includes also DSS, L4 & L3.
|
|
*/
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_MPU, PM_MPU_OFFSET);
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_GFX, PM_GFX_OFFSET);
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_DSS | AUTOSTAT_L4 | AUTOSTAT_L3,
|
|
PM_CORE_OFFSET);
|
|
if (cpu_is_omap2420())
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_IVA | AUTOSTAT_DSP,
|
|
PM_DSP_OFFSET);
|
|
else {
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_DSP, PM_DSP_OFFSET);
|
|
pmdomain_set_clock_autocontrol(AUTOSTAT_MDM, PM_MDM_OFFSET);
|
|
}
|
|
|
|
/* Enable clock autoidle for all domains */
|
|
pmdomain_set_clock_autoidle1(0x2, PM_DSP_OFFSET);
|
|
if (cpu_is_omap2420()) {
|
|
pmdomain_set_clock_autoidle1(0xfffffff9, PM_CORE_OFFSET);
|
|
pmdomain_set_clock_autoidle2(0x7, PM_CORE_OFFSET);
|
|
pmdomain_set_clock_autoidle1(0x3f, PM_WKUP_OFFSET);
|
|
} else {
|
|
pmdomain_set_clock_autoidle1(0xeafffff1, PM_CORE_OFFSET);
|
|
pmdomain_set_clock_autoidle2(0xfff, PM_CORE_OFFSET);
|
|
pmdomain_set_clock_autoidle1(0x7f, PM_WKUP_OFFSET);
|
|
pmdomain_set_clock_autoidle1(0x3, PM_MDM_OFFSET);
|
|
}
|
|
pmdomain_set_clock_autoidle3(0x7, PM_CORE_OFFSET);
|
|
pmdomain_set_clock_autoidle4(0x1f, PM_CORE_OFFSET);
|
|
}
|
|
|
|
/*
|
|
* Initializes power domains by removing wake-up dependencies and powering
|
|
* down DSP and GFX. Gets called from PM init. Note that DSP and IVA code
|
|
* must re-enable DSP and GFX when used.
|
|
*/
|
|
void __init pmdomain_init(void)
|
|
{
|
|
/* Remove all domain wakeup dependencies */
|
|
pmdomain_set_wakeup_dependencies(EN_WKUP | EN_CORE, PM_MPU_OFFSET);
|
|
pmdomain_set_wakeup_dependencies(0, PM_DSP_OFFSET);
|
|
pmdomain_set_wakeup_dependencies(0, PM_GFX_OFFSET);
|
|
pmdomain_set_wakeup_dependencies(EN_WKUP | EN_MPU, PM_CORE_OFFSET);
|
|
if (cpu_is_omap2430())
|
|
pmdomain_set_wakeup_dependencies(0, PM_MDM_OFFSET);
|
|
|
|
/* Power down DSP and GFX */
|
|
pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_DSP_OFFSET);
|
|
pmdomain_set_powerstate(POWERSTATE_OFF | FORCESTATE, PM_GFX_OFFSET);
|
|
}
|