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0e35ad053f
Add support for setting up the memory controller parameters. Boards can set up an appropriate table in the device tree. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
114 lines
3.8 KiB
C
114 lines
3.8 KiB
C
/*
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* Copyright (c) 2011 The Chromium OS Authors.
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* (C) Copyright 2010,2011 NVIDIA Corporation <www.nvidia.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef _ARCH_EMC_H_
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#define _ARCH_EMC_H_
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#include <asm/types.h>
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#define TEGRA_EMC_NUM_REGS 46
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/* EMC Registers */
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struct emc_ctlr {
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u32 cfg; /* 0x00: EMC_CFG */
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u32 reserved0[3]; /* 0x04 ~ 0x0C */
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u32 adr_cfg; /* 0x10: EMC_ADR_CFG */
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u32 adr_cfg1; /* 0x14: EMC_ADR_CFG_1 */
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u32 reserved1[2]; /* 0x18 ~ 0x18 */
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u32 refresh_ctrl; /* 0x20: EMC_REFCTRL */
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u32 pin; /* 0x24: EMC_PIN */
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u32 timing_ctrl; /* 0x28: EMC_TIMING_CONTROL */
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u32 rc; /* 0x2C: EMC_RC */
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u32 rfc; /* 0x30: EMC_RFC */
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u32 ras; /* 0x34: EMC_RAS */
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u32 rp; /* 0x38: EMC_RP */
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u32 r2w; /* 0x3C: EMC_R2W */
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u32 w2r; /* 0x40: EMC_W2R */
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u32 r2p; /* 0x44: EMC_R2P */
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u32 w2p; /* 0x48: EMC_W2P */
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u32 rd_rcd; /* 0x4C: EMC_RD_RCD */
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u32 wd_rcd; /* 0x50: EMC_WD_RCD */
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u32 rrd; /* 0x54: EMC_RRD */
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u32 rext; /* 0x58: EMC_REXT */
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u32 wdv; /* 0x5C: EMC_WDV */
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u32 quse; /* 0x60: EMC_QUSE */
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u32 qrst; /* 0x64: EMC_QRST */
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u32 qsafe; /* 0x68: EMC_QSAFE */
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u32 rdv; /* 0x6C: EMC_RDV */
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u32 refresh; /* 0x70: EMC_REFRESH */
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u32 burst_refresh_num; /* 0x74: EMC_BURST_REFRESH_NUM */
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u32 pdex2wr; /* 0x78: EMC_PDEX2WR */
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u32 pdex2rd; /* 0x7c: EMC_PDEX2RD */
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u32 pchg2pden; /* 0x80: EMC_PCHG2PDEN */
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u32 act2pden; /* 0x84: EMC_ACT2PDEN */
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u32 ar2pden; /* 0x88: EMC_AR2PDEN */
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u32 rw2pden; /* 0x8C: EMC_RW2PDEN */
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u32 txsr; /* 0x90: EMC_TXSR */
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u32 tcke; /* 0x94: EMC_TCKE */
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u32 tfaw; /* 0x98: EMC_TFAW */
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u32 trpab; /* 0x9C: EMC_TRPAB */
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u32 tclkstable; /* 0xA0: EMC_TCLKSTABLE */
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u32 tclkstop; /* 0xA4: EMC_TCLKSTOP */
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u32 trefbw; /* 0xA8: EMC_TREFBW */
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u32 quse_extra; /* 0xAC: EMC_QUSE_EXTRA */
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u32 odt_write; /* 0xB0: EMC_ODT_WRITE */
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u32 odt_read; /* 0xB4: EMC_ODT_READ */
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u32 reserved2[5]; /* 0xB8 ~ 0xC8 */
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u32 mrs; /* 0xCC: EMC_MRS */
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u32 emrs; /* 0xD0: EMC_EMRS */
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u32 ref; /* 0xD4: EMC_REF */
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u32 pre; /* 0xD8: EMC_PRE */
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u32 nop; /* 0xDC: EMC_NOP */
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u32 self_ref; /* 0xE0: EMC_SELF_REF */
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u32 dpd; /* 0xE4: EMC_DPD */
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u32 mrw; /* 0xE8: EMC_MRW */
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u32 mrr; /* 0xEC: EMC_MRR */
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u32 reserved3; /* 0xF0: */
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u32 fbio_cfg1; /* 0xF4: EMC_FBIO_CFG1 */
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u32 fbio_dqsib_dly; /* 0xF8: EMC_FBIO_DQSIB_DLY */
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u32 fbio_dqsib_dly_msb; /* 0xFC: EMC_FBIO_DQSIB_DLY_MSG */
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u32 fbio_spare; /* 0x100: SBIO_SPARE */
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/* There are more registers ... */
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};
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/**
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* Set up the EMC for the given rate. The timing parameters are retrieved
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* from the device tree "nvidia,tegra20-emc" node and its
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* "nvidia,tegra20-emc-table" sub-nodes.
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*
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* @param blob Device tree blob
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* @param rate Clock speed of memory controller in Hz (=2x memory bus rate)
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* @return 0 if ok, else -ve error code (look in emc.c to decode it)
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*/
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int tegra_set_emc(const void *blob, unsigned rate);
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/**
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* Get a pointer to the EMC controller from the device tree.
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*
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* @param blob Device tree blob
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* @return pointer to EMC controller
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*/
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struct emc_ctlr *emc_get_controller(const void *blob);
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#endif
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