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#ifndef ____ASM_ARCH_SDRC_H
#define ____ASM_ARCH_SDRC_H
/*
* OMAP2/3 SDRC/SMS register definitions
*
* Copyright (C) 2007-2008 Texas Instruments, Inc.
* Copyright (C) 2007-2008 Nokia Corporation
*
* Tony Lindgren
* Paul Walmsley
* 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.
*/
#include <mach/io.h>
/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
#define SDRC_SYSCONFIG 0x010
#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_MR_0 0x084
#define SDRC_ACTIM_CTRL_A_0 0x09c
#define SDRC_ACTIM_CTRL_B_0 0x0a0
#define SDRC_RFR_CTRL_0 0x0a4
/*
* 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 *)IO_ADDRESS(OMAP2420_SMS_BASE + reg)
#define OMAP243X_SMS_REGADDR(reg) \
(void __iomem *)IO_ADDRESS(OMAP243X_SMS_BASE + reg)
#define OMAP343X_SMS_REGADDR(reg) \
(void __iomem *)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 */
#ifndef __ASSEMBLER__
/**
* 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;
};
void __init omap2_sdrc_init(struct omap_sdrc_params *sp);
struct omap_sdrc_params *omap2_sdrc_get_params(unsigned long r);
#ifdef CONFIG_ARCH_OMAP2
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);
u32 omap2xxx_sdrc_dll_is_unlocked(void);
u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
#endif /* CONFIG_ARCH_OMAP2 */
#endif /* __ASSEMBLER__ */
#endif
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