| /* |
| * 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); |
| } |