forked from Minki/linux
e6d3a8b0bd
OMAP4 has module specific context lost registers which makes it now possible to have module level context loss count, instead of relying on the powerdomain level context count. Add 2 private hwmod api's to update/clear the hwmod/module specific context lost counters/register. Update the module specific context_lost_counter and clear the hardware bits just after enabling the module. omap_hwmod_get_context_loss_count() now returns the hwmod context loss count them on platforms where they exist (OMAP4), else fall back on the pwrdm level counters for older platforms. Signed-off-by: Rajendra Nayak <rnayak@ti.com> [paul@pwsan.com: added function kerneldoc, fixed structure kerneldoc, rearranged structure to avoid memory waste, marked fns as OMAP4-specific, prevent fn entry on non-OMAP4 chips, reduced indentation, merged update and clear, merged patches] [t-kristo@ti.com: added support for arch specific hwmod ops, and changed the no context offset indicator to USHRT_MAX] Signed-off-by: Tero Kristo <t-kristo@ti.com> [paul@pwsan.com: use NO_CONTEXT_LOSS_BIT flag rather than USHRT_MAX; convert unsigned context lost counter to int to match the return type; get rid of hwmod_ops in favor of the existing soc_ops mechanism; move context loss low-level accesses to the PRM code] Signed-off-by: Paul Walmsley <paul@pwsan.com>
141 lines
4.1 KiB
C
141 lines
4.1 KiB
C
/*
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* OMAP2/3/4 Power/Reset Management (PRM) bitfield definitions
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*
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* Copyright (C) 2007-2009, 2012 Texas Instruments, Inc.
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* Copyright (C) 2010 Nokia Corporation
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*
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* Paul Walmsley
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ARCH_ARM_MACH_OMAP2_PRM_H
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#define __ARCH_ARM_MACH_OMAP2_PRM_H
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#include "prcm-common.h"
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# ifndef __ASSEMBLER__
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extern void __iomem *prm_base;
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extern void omap2_set_globals_prm(void __iomem *prm);
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# endif
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/*
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* MAX_MODULE_SOFTRESET_WAIT: Maximum microseconds to wait for OMAP
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* module to softreset
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*/
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#define MAX_MODULE_SOFTRESET_WAIT 10000
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/*
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* MAX_MODULE_HARDRESET_WAIT: Maximum microseconds to wait for an OMAP
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* submodule to exit hardreset
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*/
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#define MAX_MODULE_HARDRESET_WAIT 10000
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/*
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* Register bitfields
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*/
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/*
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* 24XX: PM_PWSTST_CORE, PM_PWSTST_GFX, PM_PWSTST_MPU, PM_PWSTST_DSP
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*
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* 2430: PM_PWSTST_MDM
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*
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* 3430: PM_PWSTST_IVA2, PM_PWSTST_MPU, PM_PWSTST_CORE, PM_PWSTST_GFX,
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* PM_PWSTST_DSS, PM_PWSTST_CAM, PM_PWSTST_PER, PM_PWSTST_EMU,
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* PM_PWSTST_NEON
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*/
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#define OMAP_INTRANSITION_MASK (1 << 20)
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/*
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* 24XX: PM_PWSTST_GFX, PM_PWSTST_DSP
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*
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* 2430: PM_PWSTST_MDM
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*
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* 3430: PM_PWSTST_IVA2, PM_PWSTST_MPU, PM_PWSTST_CORE, PM_PWSTST_GFX,
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* PM_PWSTST_DSS, PM_PWSTST_CAM, PM_PWSTST_PER, PM_PWSTST_EMU,
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* PM_PWSTST_NEON
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*/
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#define OMAP_POWERSTATEST_SHIFT 0
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#define OMAP_POWERSTATEST_MASK (0x3 << 0)
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/*
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* 24XX: PM_PWSTCTRL_MPU, PM_PWSTCTRL_CORE, PM_PWSTCTRL_GFX,
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* PM_PWSTCTRL_DSP, PM_PWSTST_MPU
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*
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* 2430: PM_PWSTCTRL_MDM shared bits
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*
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* 3430: PM_PWSTCTRL_IVA2, PM_PWSTCTRL_MPU, PM_PWSTCTRL_CORE,
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* PM_PWSTCTRL_GFX, PM_PWSTCTRL_DSS, PM_PWSTCTRL_CAM, PM_PWSTCTRL_PER,
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* PM_PWSTCTRL_NEON shared bits
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*/
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#define OMAP_POWERSTATE_SHIFT 0
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#define OMAP_POWERSTATE_MASK (0x3 << 0)
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/*
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* Standardized OMAP reset source bits
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*
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* To the extent these happen to match the hardware register bit
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* shifts, it's purely coincidental. Used by omap-wdt.c.
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* OMAP_UNKNOWN_RST_SRC_ID_SHIFT is a special value, used whenever
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* there are any bits remaining in the global PRM_RSTST register that
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* haven't been identified, or when the PRM code for the current SoC
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* doesn't know how to interpret the register.
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*/
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#define OMAP_GLOBAL_COLD_RST_SRC_ID_SHIFT 0
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#define OMAP_GLOBAL_WARM_RST_SRC_ID_SHIFT 1
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#define OMAP_SECU_VIOL_RST_SRC_ID_SHIFT 2
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#define OMAP_MPU_WD_RST_SRC_ID_SHIFT 3
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#define OMAP_SECU_WD_RST_SRC_ID_SHIFT 4
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#define OMAP_EXTWARM_RST_SRC_ID_SHIFT 5
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#define OMAP_VDD_MPU_VM_RST_SRC_ID_SHIFT 6
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#define OMAP_VDD_IVA_VM_RST_SRC_ID_SHIFT 7
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#define OMAP_VDD_CORE_VM_RST_SRC_ID_SHIFT 8
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#define OMAP_ICEPICK_RST_SRC_ID_SHIFT 9
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#define OMAP_ICECRUSHER_RST_SRC_ID_SHIFT 10
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#define OMAP_C2C_RST_SRC_ID_SHIFT 11
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#define OMAP_UNKNOWN_RST_SRC_ID_SHIFT 12
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#ifndef __ASSEMBLER__
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/**
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* struct prm_reset_src_map - map register bitshifts to standard bitshifts
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* @reg_shift: bitshift in the PRM reset source register
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* @std_shift: bitshift equivalent in the standard reset source list
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*
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* The fields are signed because -1 is used as a terminator.
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*/
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struct prm_reset_src_map {
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s8 reg_shift;
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s8 std_shift;
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};
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/**
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* struct prm_ll_data - fn ptrs to per-SoC PRM function implementations
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* @read_reset_sources: ptr to the SoC PRM-specific get_reset_source impl
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* @was_any_context_lost_old: ptr to the SoC PRM context loss test fn
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* @clear_context_loss_flags_old: ptr to the SoC PRM context loss flag clear fn
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*
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* XXX @was_any_context_lost_old and @clear_context_loss_flags_old are
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* deprecated.
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*/
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struct prm_ll_data {
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u32 (*read_reset_sources)(void);
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bool (*was_any_context_lost_old)(u8 part, s16 inst, u16 idx);
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void (*clear_context_loss_flags_old)(u8 part, s16 inst, u16 idx);
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};
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extern int prm_register(struct prm_ll_data *pld);
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extern int prm_unregister(struct prm_ll_data *pld);
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extern u32 prm_read_reset_sources(void);
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extern bool prm_was_any_context_lost_old(u8 part, s16 inst, u16 idx);
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extern void prm_clear_context_loss_flags_old(u8 part, s16 inst, u16 idx);
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#endif
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#endif
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