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linux/arch/arm/mach-omap2/sdrc.h
Victor Kamensky edfaf05c2f ARM: OMAP2+: raw read and write endian fix 
All OMAP IP blocks expect LE data, but CPU may operate in BE mode.
Need to use endian neutral functions to read/write h/w registers.
I.e instead of __raw_read[lw] and __raw_write[lw] functions code
need to use read[lw]_relaxed and write[lw]_relaxed functions.
If the first simply reads/writes register, the second will byteswap
it if host operates in BE mode.

Changes are trivial sed like replacement of __raw_xxx functions
with xxx_relaxed variant.

Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2014-05-08 07:09:53 -07:00

214 lines
6.8 KiB
C
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#ifndef __ARCH_ARM_MACH_OMAP2_SDRC_H
#define __ARCH_ARM_MACH_OMAP2_SDRC_H
/*
* OMAP2/3 SDRC/SMS macros and prototypes
*
* Copyright (C) 2007-2008, 2012 Texas Instruments, Inc.
* Copyright (C) 2007-2008 Nokia Corporation
*
* Paul Walmsley
* Tony Lindgren
* Richard Woodruff
*
* 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.
*/
#undef DEBUG
#ifndef __ASSEMBLER__
#include <linux/io.h>
extern void __iomem *omap2_sdrc_base;
extern void __iomem *omap2_sms_base;
#define OMAP_SDRC_REGADDR(reg) (omap2_sdrc_base + (reg))
#define OMAP_SMS_REGADDR(reg) (omap2_sms_base + (reg))
/* SDRC global register get/set */
static inline void sdrc_write_reg(u32 val, u16 reg)
{
writel_relaxed(val, OMAP_SDRC_REGADDR(reg));
}
static inline u32 sdrc_read_reg(u16 reg)
{
return readl_relaxed(OMAP_SDRC_REGADDR(reg));
}
/* SMS global register get/set */
static inline void sms_write_reg(u32 val, u16 reg)
{
writel_relaxed(val, OMAP_SMS_REGADDR(reg));
}
static inline u32 sms_read_reg(u16 reg)
{
return readl_relaxed(OMAP_SMS_REGADDR(reg));
}
extern void omap2_set_globals_sdrc(void __iomem *sdrc, void __iomem *sms);
/**
* struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
* @rate: SDRC clock rate (in Hz)
* @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
* @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
* @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
* @mr: Value to program to SDRC_MR for this rate
*
* This structure holds a pre-computed set of register values for the
* SDRC for a given SDRC clock rate and SDRAM chip. These are
* intended to be pre-computed and specified in an array in the board-*.c
* files. The structure is keyed off the 'rate' field.
*/
struct omap_sdrc_params {
unsigned long rate;
u32 actim_ctrla;
u32 actim_ctrlb;
u32 rfr_ctrl;
u32 mr;
};
#ifdef CONFIG_SOC_HAS_OMAP2_SDRC
void omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
struct omap_sdrc_params *sdrc_cs1);
#else
static inline void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
struct omap_sdrc_params *sdrc_cs1) {};
#endif
int omap2_sdrc_get_params(unsigned long r,
struct omap_sdrc_params **sdrc_cs0,
struct omap_sdrc_params **sdrc_cs1);
void omap2_sms_save_context(void);
void omap2_sms_restore_context(void);
struct memory_timings {
u32 m_type; /* ddr = 1, sdr = 0 */
u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */
u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */
u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */
u32 base_cs; /* base chip select to use for calculations */
};
extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
struct omap_sdrc_params *rx51_get_sdram_timings(void);
u32 omap2xxx_sdrc_dll_is_unlocked(void);
u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
#else
#define OMAP242X_SDRC_REGADDR(reg) \
OMAP2_L3_IO_ADDRESS(OMAP2420_SDRC_BASE + (reg))
#define OMAP243X_SDRC_REGADDR(reg) \
OMAP2_L3_IO_ADDRESS(OMAP243X_SDRC_BASE + (reg))
#define OMAP34XX_SDRC_REGADDR(reg) \
OMAP2_L3_IO_ADDRESS(OMAP343X_SDRC_BASE + (reg))
#endif /* __ASSEMBLER__ */
/* Minimum frequency that the SDRC DLL can lock at */
#define MIN_SDRC_DLL_LOCK_FREQ 83000000
/* Scale factor for fixed-point arith in omap3_core_dpll_m2_set_rate() */
#define SDRC_MPURATE_SCALE 8
/* 2^SDRC_MPURATE_BASE_SHIFT: MPU MHz that SDRC_MPURATE_LOOPS is defined for */
#define SDRC_MPURATE_BASE_SHIFT 9
/*
* SDRC_MPURATE_LOOPS: Number of MPU loops to execute at
* 2^MPURATE_BASE_SHIFT MHz for SDRC to stabilize
*/
#define SDRC_MPURATE_LOOPS 96
/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
#define SDRC_SYSCONFIG 0x010
#define SDRC_CS_CFG 0x040
#define SDRC_SHARING 0x044
#define SDRC_ERR_TYPE 0x04C
#define SDRC_DLLA_CTRL 0x060
#define SDRC_DLLA_STATUS 0x064
#define SDRC_DLLB_CTRL 0x068
#define SDRC_DLLB_STATUS 0x06C
#define SDRC_POWER 0x070
#define SDRC_MCFG_0 0x080
#define SDRC_MR_0 0x084
#define SDRC_EMR2_0 0x08c
#define SDRC_ACTIM_CTRL_A_0 0x09c
#define SDRC_ACTIM_CTRL_B_0 0x0a0
#define SDRC_RFR_CTRL_0 0x0a4
#define SDRC_MANUAL_0 0x0a8
#define SDRC_MCFG_1 0x0B0
#define SDRC_MR_1 0x0B4
#define SDRC_EMR2_1 0x0BC
#define SDRC_ACTIM_CTRL_A_1 0x0C4
#define SDRC_ACTIM_CTRL_B_1 0x0C8
#define SDRC_RFR_CTRL_1 0x0D4
#define SDRC_MANUAL_1 0x0D8
#define SDRC_POWER_AUTOCOUNT_SHIFT 8
#define SDRC_POWER_AUTOCOUNT_MASK (0xffff << SDRC_POWER_AUTOCOUNT_SHIFT)
#define SDRC_POWER_CLKCTRL_SHIFT 4
#define SDRC_POWER_CLKCTRL_MASK (0x3 << SDRC_POWER_CLKCTRL_SHIFT)
#define SDRC_SELF_REFRESH_ON_AUTOCOUNT (0x2 << SDRC_POWER_CLKCTRL_SHIFT)
/*
* These values represent the number of memory clock cycles between
* autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192
* rows per device, and include a subtraction of a 50 cycle window in the
* event that the autorefresh command is delayed due to other SDRC activity.
* The '| 1' sets the ARE field to send one autorefresh when the autorefresh
* counter reaches 0.
*
* These represent optimal values for common parts, it won't work for all.
* As long as you scale down, most parameters are still work, they just
* become sub-optimal. The RFR value goes in the opposite direction. If you
* don't adjust it down as your clock period increases the refresh interval
* will not be met. Setting all parameters for complete worst case may work,
* but may cut memory performance by 2x. Due to errata the DLLs need to be
* unlocked and their value needs run time calibration. A dynamic call is
* need for that as no single right value exists acorss production samples.
*
* Only the FULL speed values are given. Current code is such that rate
* changes must be made at DPLLoutx2. The actual value adjustment for low
* frequency operation will be handled by omap_set_performance()
*
* By having the boot loader boot up in the fastest L4 speed available likely
* will result in something which you can switch between.
*/
#define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1)
#define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1)
#define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1)
#define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */
#define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */
/*
* SMS register access
*/
#define OMAP242X_SMS_REGADDR(reg) \
(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP2420_SMS_BASE + reg)
#define OMAP243X_SMS_REGADDR(reg) \
(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP243X_SMS_BASE + reg)
#define OMAP343X_SMS_REGADDR(reg) \
(void __iomem *)OMAP2_L3_IO_ADDRESS(OMAP343X_SMS_BASE + reg)
/* SMS register offsets - read/write with sms_{read,write}_reg() */
#define SMS_SYSCONFIG 0x010
/* REVISIT: fill in other SMS registers here */
#endif
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