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linux/arch/arm/mach-omap2/prm2xxx_3xxx.h
Paul Walmsley 2bb2a5d30a ARM: OMAP2+: PRM: create PRM reset source API for the watchdog timer driver 
The OMAP watchdog timer driver needs to determine what caused the SoC
to reset for its GETBOOTSTATUS ioctl.  So, define a set of standard
reset sources across OMAP SoCs.  For OMAP2xxx, 3xxx, and 4xxx SoCs,
define mappings from the SoC-specific reset source register bits to
the standardized reset source IDs.  Create SoC-specific PRM functions
that read the appropriate per-SoC register and use the mapping to
return the standardized reset bits.  Register the SoC-specific PRM
functions with the common PRM code via prm_register().  Create a
function in the common PRM code, prm_read_reset_sources(), that
calls the SoC-specific function, registered during boot.

This patch does not yet handle some SoCs, such as AM33xx.  Those SoCs
were not handled by the code this will replace.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
2012-10-21 01:01:13 -06:00

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/*
* OMAP2xxx/3xxx-common Power/Reset Management (PRM) register definitions
*
* Copyright (C) 2007-2009, 2011-2012 Texas Instruments, Inc.
* Copyright (C) 2008-2010 Nokia Corporation
* 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.
*
* The PRM hardware modules on the OMAP2/3 are quite similar to each
* other. The PRM on OMAP4 has a new register layout, and is handled
* in a separate file.
*/
#ifndef __ARCH_ARM_MACH_OMAP2_PRM2XXX_3XXX_H
#define __ARCH_ARM_MACH_OMAP2_PRM2XXX_3XXX_H
#include "prcm-common.h"
#include "prm.h"
/*
* Module specific PRM register offsets from PRM_BASE + domain offset
*
* Use prm_{read,write}_mod_reg() with these registers.
*
* With a few exceptions, these are the register names beginning with
* {PM,RM}_* on both OMAP2/3 SoC families.. (The exceptions are the
* IRQSTATUS and IRQENABLE bits.)
*/
/* Register offsets appearing on both OMAP2 and OMAP3 */
#define OMAP2_RM_RSTCTRL 0x0050
#define OMAP2_RM_RSTTIME 0x0054
#define OMAP2_RM_RSTST 0x0058
#define OMAP2_PM_PWSTCTRL 0x00e0
#define OMAP2_PM_PWSTST 0x00e4
#define PM_WKEN 0x00a0
#define PM_WKEN1 PM_WKEN
#define PM_WKST 0x00b0
#define PM_WKST1 PM_WKST
#define PM_WKDEP 0x00c8
#define PM_EVGENCTRL 0x00d4
#define PM_EVGENONTIM 0x00d8
#define PM_EVGENOFFTIM 0x00dc
#ifndef __ASSEMBLER__
#include <linux/io.h>
#include "powerdomain.h"
/* Power/reset management domain register get/set */
static inline u32 omap2_prm_read_mod_reg(s16 module, u16 idx)
{
return __raw_readl(prm_base + module + idx);
}
static inline void omap2_prm_write_mod_reg(u32 val, s16 module, u16 idx)
{
__raw_writel(val, prm_base + module + idx);
}
/* Read-modify-write a register in a PRM module. Caller must lock */
static inline u32 omap2_prm_rmw_mod_reg_bits(u32 mask, u32 bits, s16 module,
s16 idx)
{
u32 v;
v = omap2_prm_read_mod_reg(module, idx);
v &= ~mask;
v |= bits;
omap2_prm_write_mod_reg(v, module, idx);
return v;
}
/* Read a PRM register, AND it, and shift the result down to bit 0 */
static inline u32 omap2_prm_read_mod_bits_shift(s16 domain, s16 idx, u32 mask)
{
u32 v;
v = omap2_prm_read_mod_reg(domain, idx);
v &= mask;
v >>= __ffs(mask);
return v;
}
static inline u32 omap2_prm_set_mod_reg_bits(u32 bits, s16 module, s16 idx)
{
return omap2_prm_rmw_mod_reg_bits(bits, bits, module, idx);
}
static inline u32 omap2_prm_clear_mod_reg_bits(u32 bits, s16 module, s16 idx)
{
return omap2_prm_rmw_mod_reg_bits(bits, 0x0, module, idx);
}
/* These omap2_ PRM functions apply to both OMAP2 and 3 */
extern int omap2_prm_is_hardreset_asserted(s16 prm_mod, u8 shift);
extern int omap2_prm_assert_hardreset(s16 prm_mod, u8 shift);
extern int omap2_prm_deassert_hardreset(s16 prm_mod, u8 rst_shift, u8 st_shift);
extern int omap2_pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst);
extern int omap2_pwrdm_read_next_pwrst(struct powerdomain *pwrdm);
extern int omap2_pwrdm_read_pwrst(struct powerdomain *pwrdm);
extern int omap2_pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank,
u8 pwrst);
extern int omap2_pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank,
u8 pwrst);
extern int omap2_pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank);
extern int omap2_pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank);
extern int omap2_pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst);
extern int omap2_pwrdm_wait_transition(struct powerdomain *pwrdm);
extern int omap2_clkdm_add_wkdep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2);
extern int omap2_clkdm_del_wkdep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2);
extern int omap2_clkdm_read_wkdep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2);
extern int omap2_clkdm_clear_all_wkdeps(struct clockdomain *clkdm);
#endif /* __ASSEMBLER */
/*
* Bits common to specific registers
*
* The 3430 register and bit names are generally used,
* since they tend to make more sense
*/
/* PM_EVGENONTIM_MPU */
/* Named PM_EVEGENONTIM_MPU on the 24XX */
#define OMAP_ONTIMEVAL_SHIFT 0
#define OMAP_ONTIMEVAL_MASK (0xffffffff << 0)
/* PM_EVGENOFFTIM_MPU */
/* Named PM_EVEGENOFFTIM_MPU on the 24XX */
#define OMAP_OFFTIMEVAL_SHIFT 0
#define OMAP_OFFTIMEVAL_MASK (0xffffffff << 0)
/* PRM_CLKSETUP and PRCM_VOLTSETUP */
/* Named PRCM_CLKSSETUP on the 24XX */
#define OMAP_SETUP_TIME_SHIFT 0
#define OMAP_SETUP_TIME_MASK (0xffff << 0)
/* PRM_CLKSRC_CTRL */
/* Named PRCM_CLKSRC_CTRL on the 24XX */
#define OMAP_SYSCLKDIV_SHIFT 6
#define OMAP_SYSCLKDIV_MASK (0x3 << 6)
#define OMAP_AUTOEXTCLKMODE_SHIFT 3
#define OMAP_AUTOEXTCLKMODE_MASK (0x3 << 3)
#define OMAP_SYSCLKSEL_SHIFT 0
#define OMAP_SYSCLKSEL_MASK (0x3 << 0)
/* PM_EVGENCTRL_MPU */
#define OMAP_OFFLOADMODE_SHIFT 3
#define OMAP_OFFLOADMODE_MASK (0x3 << 3)
#define OMAP_ONLOADMODE_SHIFT 1
#define OMAP_ONLOADMODE_MASK (0x3 << 1)
#define OMAP_ENABLE_MASK (1 << 0)
/* PRM_RSTTIME */
/* Named RM_RSTTIME_WKUP on the 24xx */
#define OMAP_RSTTIME2_SHIFT 8
#define OMAP_RSTTIME2_MASK (0x1f << 8)
#define OMAP_RSTTIME1_SHIFT 0
#define OMAP_RSTTIME1_MASK (0xff << 0)
/* PRM_RSTCTRL */
/* Named RM_RSTCTRL_WKUP on the 24xx */
/* 2420 calls RST_DPLL3 'RST_DPLL' */
#define OMAP_RST_DPLL3_MASK (1 << 2)
#define OMAP_RST_GS_MASK (1 << 1)
/*
* Bits common to module-shared registers
*
* Not all registers of a particular type support all of these bits -
* check TRM if you are unsure
*/
/*
* 24XX: RM_RSTST_MPU and RM_RSTST_DSP - on 24XX, 'COREDOMAINWKUP_RST' is
* called 'COREWKUP_RST'
*
* 3430: RM_RSTST_IVA2, RM_RSTST_MPU, RM_RSTST_GFX, RM_RSTST_DSS,
* RM_RSTST_CAM, RM_RSTST_PER, RM_RSTST_NEON
*/
#define OMAP_COREDOMAINWKUP_RST_MASK (1 << 3)
/*
* 24XX: RM_RSTST_MPU, RM_RSTST_GFX, RM_RSTST_DSP
*
* 2430: RM_RSTST_MDM
*
* 3430: RM_RSTST_CORE, RM_RSTST_EMU
*/
#define OMAP_DOMAINWKUP_RST_MASK (1 << 2)
/*
* 24XX: RM_RSTST_MPU, RM_RSTST_WKUP, RM_RSTST_DSP
* On 24XX, 'GLOBALWARM_RST' is called 'GLOBALWMPU_RST'.
*
* 2430: RM_RSTST_MDM
*
* 3430: RM_RSTST_CORE, RM_RSTST_EMU
*/
#define OMAP_GLOBALWARM_RST_SHIFT 1
#define OMAP_GLOBALWARM_RST_MASK (1 << 1)
#define OMAP_GLOBALCOLD_RST_SHIFT 0
#define OMAP_GLOBALCOLD_RST_MASK (1 << 0)
/*
* 24XX: PM_WKDEP_GFX, PM_WKDEP_MPU, PM_WKDEP_CORE, PM_WKDEP_DSP
* 2420 TRM sometimes uses "EN_WAKEUP" instead of "EN_WKUP"
*
* 2430: PM_WKDEP_MDM
*
* 3430: PM_WKDEP_IVA2, PM_WKDEP_GFX, PM_WKDEP_DSS, PM_WKDEP_CAM,
* PM_WKDEP_PER
*/
#define OMAP_EN_WKUP_SHIFT 4
#define OMAP_EN_WKUP_MASK (1 << 4)
/*
* 24XX: PM_PWSTCTRL_MPU, PM_PWSTCTRL_CORE, PM_PWSTCTRL_GFX,
* PM_PWSTCTRL_DSP
*
* 2430: PM_PWSTCTRL_MDM
*
* 3430: PM_PWSTCTRL_IVA2, PM_PWSTCTRL_CORE, PM_PWSTCTRL_GFX,
* PM_PWSTCTRL_DSS, PM_PWSTCTRL_CAM, PM_PWSTCTRL_PER,
* PM_PWSTCTRL_NEON
*/
#define OMAP_LOGICRETSTATE_MASK (1 << 2)
/*
* MAX_MODULE_HARDRESET_WAIT: Maximum microseconds to wait for an OMAP
* submodule to exit hardreset
*/
#define MAX_MODULE_HARDRESET_WAIT 10000
#endif
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