144 lines
4.8 KiB
C
144 lines
4.8 KiB
C
#ifndef ____ASM_ARCH_SDRC_H
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#define ____ASM_ARCH_SDRC_H
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/*
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* OMAP2/3 SDRC/SMS register definitions
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*
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* Copyright (C) 2007-2008 Texas Instruments, Inc.
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* Copyright (C) 2007-2008 Nokia Corporation
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*
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* Tony Lindgren
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* Paul Walmsley
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* Richard Woodruff
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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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#include <mach/io.h>
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/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
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#define SDRC_SYSCONFIG 0x010
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#define SDRC_CS_CFG 0x040
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#define SDRC_SHARING 0x044
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#define SDRC_ERR_TYPE 0x04C
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#define SDRC_DLLA_CTRL 0x060
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#define SDRC_DLLA_STATUS 0x064
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#define SDRC_DLLB_CTRL 0x068
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#define SDRC_DLLB_STATUS 0x06C
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#define SDRC_POWER 0x070
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#define SDRC_MCFG_0 0x080
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#define SDRC_MR_0 0x084
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#define SDRC_EMR2_0 0x08c
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#define SDRC_ACTIM_CTRL_A_0 0x09c
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#define SDRC_ACTIM_CTRL_B_0 0x0a0
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#define SDRC_RFR_CTRL_0 0x0a4
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#define SDRC_MANUAL_0 0x0a8
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#define SDRC_MCFG_1 0x0B0
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#define SDRC_MR_1 0x0B4
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#define SDRC_EMR2_1 0x0BC
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#define SDRC_ACTIM_CTRL_A_1 0x0C4
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#define SDRC_ACTIM_CTRL_B_1 0x0C8
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#define SDRC_RFR_CTRL_1 0x0D4
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#define SDRC_MANUAL_1 0x0D8
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/*
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* These values represent the number of memory clock cycles between
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* autorefresh initiation. They assume 1 refresh per 64 ms (JEDEC), 8192
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* rows per device, and include a subtraction of a 50 cycle window in the
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* event that the autorefresh command is delayed due to other SDRC activity.
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* The '| 1' sets the ARE field to send one autorefresh when the autorefresh
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* counter reaches 0.
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*
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* These represent optimal values for common parts, it won't work for all.
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* As long as you scale down, most parameters are still work, they just
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* become sub-optimal. The RFR value goes in the opposite direction. If you
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* don't adjust it down as your clock period increases the refresh interval
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* will not be met. Setting all parameters for complete worst case may work,
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* but may cut memory performance by 2x. Due to errata the DLLs need to be
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* unlocked and their value needs run time calibration. A dynamic call is
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* need for that as no single right value exists acorss production samples.
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*
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* Only the FULL speed values are given. Current code is such that rate
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* changes must be made at DPLLoutx2. The actual value adjustment for low
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* frequency operation will be handled by omap_set_performance()
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*
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* By having the boot loader boot up in the fastest L4 speed available likely
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* will result in something which you can switch between.
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*/
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#define SDRC_RFR_CTRL_165MHz (0x00044c00 | 1)
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#define SDRC_RFR_CTRL_133MHz (0x0003de00 | 1)
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#define SDRC_RFR_CTRL_100MHz (0x0002da01 | 1)
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#define SDRC_RFR_CTRL_110MHz (0x0002da01 | 1) /* Need to calc */
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#define SDRC_RFR_CTRL_BYPASS (0x00005000 | 1) /* Need to calc */
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/*
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* SMS register access
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*/
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#define OMAP242X_SMS_REGADDR(reg) \
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(void __iomem *)OMAP2_IO_ADDRESS(OMAP2420_SMS_BASE + reg)
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#define OMAP243X_SMS_REGADDR(reg) \
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(void __iomem *)OMAP2_IO_ADDRESS(OMAP243X_SMS_BASE + reg)
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#define OMAP343X_SMS_REGADDR(reg) \
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(void __iomem *)OMAP2_IO_ADDRESS(OMAP343X_SMS_BASE + reg)
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/* SMS register offsets - read/write with sms_{read,write}_reg() */
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#define SMS_SYSCONFIG 0x010
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/* REVISIT: fill in other SMS registers here */
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#ifndef __ASSEMBLER__
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/**
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* struct omap_sdrc_params - SDRC parameters for a given SDRC clock rate
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* @rate: SDRC clock rate (in Hz)
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* @actim_ctrla: Value to program to SDRC_ACTIM_CTRLA for this rate
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* @actim_ctrlb: Value to program to SDRC_ACTIM_CTRLB for this rate
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* @rfr_ctrl: Value to program to SDRC_RFR_CTRL for this rate
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* @mr: Value to program to SDRC_MR for this rate
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*
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* This structure holds a pre-computed set of register values for the
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* SDRC for a given SDRC clock rate and SDRAM chip. These are
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* intended to be pre-computed and specified in an array in the board-*.c
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* files. The structure is keyed off the 'rate' field.
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*/
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struct omap_sdrc_params {
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unsigned long rate;
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u32 actim_ctrla;
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u32 actim_ctrlb;
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u32 rfr_ctrl;
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u32 mr;
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};
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void __init omap2_sdrc_init(struct omap_sdrc_params *sdrc_cs0,
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struct omap_sdrc_params *sdrc_cs1);
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int omap2_sdrc_get_params(unsigned long r,
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struct omap_sdrc_params **sdrc_cs0,
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struct omap_sdrc_params **sdrc_cs1);
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#ifdef CONFIG_ARCH_OMAP2
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struct memory_timings {
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u32 m_type; /* ddr = 1, sdr = 0 */
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u32 dll_mode; /* use lock mode = 1, unlock mode = 0 */
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u32 slow_dll_ctrl; /* unlock mode, dll value for slow speed */
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u32 fast_dll_ctrl; /* unlock mode, dll value for fast speed */
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u32 base_cs; /* base chip select to use for calculations */
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};
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extern void omap2xxx_sdrc_init_params(u32 force_lock_to_unlock_mode);
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u32 omap2xxx_sdrc_dll_is_unlocked(void);
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u32 omap2xxx_sdrc_reprogram(u32 level, u32 force);
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#endif /* CONFIG_ARCH_OMAP2 */
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#endif /* __ASSEMBLER__ */
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#endif
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