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https://github.com/brain-hackers/u-boot-brain
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82a7edc7ea
Some Canyonlands boards are equipped with different SODIMM's. This is no problem with the "normal" NOR booting Canyonlands U-Boot, since it automatically detects the SODIMM's via SPD data and correctly configures them. But the NAND booting version is different. Here we only have 4k of image size to completely setup the hardware, including DDR2 setup. So we need to use a fixed DDR2 setup here. This doesn't work for different SODIMM's right now. Currently only this Crucial SODIMM is support: CT6464AC667.8FB (dual ranked) Now some boards are shipped with this SODIMM: CT6464AC667.4FE (single ranked) This patch now supports both SODIMM's by configuring first for the dual ranked DIMM. A quick shows, if this module is really installed. If this test fails, the DDR2 controller is re-configured for the single ranked SODIMM. Tested with those SODIMM's: CT6464AC667.8FB (dual ranked) CT6464AC667.4FE (single ranked) Signed-off-by: Stefan Roese <sr@denx.de>
150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*
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* (C) Copyright 2008-2009
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* Stefan Roese, DENX Software Engineering, sr@denx.de.
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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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#include <common.h>
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#include <ppc4xx.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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/*
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* This code can configure those two Crucial SODIMM's:
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*
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* Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank)
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* Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank)
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*
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*/
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#define TEST_ADDR 0x10000000
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#define TEST_MAGIC 0x11223344
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static void wait_init_complete(void)
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{
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u32 val;
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do {
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mfsdram(SDRAM_MCSTAT, val);
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} while (!(val & 0x80000000));
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}
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static void ddr_start(void)
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{
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mtsdram(SDRAM_MCOPT2, 0x28000000);
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wait_init_complete();
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}
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static void ddr_init_common(void)
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{
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/*
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* Reset the DDR-SDRAM controller.
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*/
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mtsdr(SDR0_SRST, (0x80000000 >> 10));
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mtsdr(SDR0_SRST, 0x00000000);
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/*
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* These values are cloned from a running NOR booting
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* Canyonlands with SPD-DDR2 detection and calibration
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* enabled. This will only work for the same memory
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* configuration as used here:
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*
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*/
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mtsdram(SDRAM_MCOPT2, 0x00000000);
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mtsdram(SDRAM_MODT0, 0x01000000);
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mtsdram(SDRAM_WRDTR, 0x82000823);
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mtsdram(SDRAM_CLKTR, 0x40000000);
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mtsdram(SDRAM_MB0CF, 0x00000201);
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mtsdram(SDRAM_RTR, 0x06180000);
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mtsdram(SDRAM_SDTR1, 0x80201000);
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mtsdram(SDRAM_SDTR2, 0x42103243);
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mtsdram(SDRAM_SDTR3, 0x0A0D0D16);
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mtsdram(SDRAM_MMODE, 0x00000632);
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mtsdram(SDRAM_MEMODE, 0x00000040);
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mtsdram(SDRAM_INITPLR0, 0xB5380000);
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mtsdram(SDRAM_INITPLR1, 0x82100400);
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mtsdram(SDRAM_INITPLR2, 0x80820000);
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mtsdram(SDRAM_INITPLR3, 0x80830000);
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mtsdram(SDRAM_INITPLR4, 0x80810040);
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mtsdram(SDRAM_INITPLR5, 0x80800532);
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mtsdram(SDRAM_INITPLR6, 0x82100400);
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mtsdram(SDRAM_INITPLR7, 0x8A080000);
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mtsdram(SDRAM_INITPLR8, 0x8A080000);
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mtsdram(SDRAM_INITPLR9, 0x8A080000);
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mtsdram(SDRAM_INITPLR10, 0x8A080000);
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mtsdram(SDRAM_INITPLR11, 0x80000432);
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mtsdram(SDRAM_INITPLR12, 0x808103C0);
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mtsdram(SDRAM_INITPLR13, 0x80810040);
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mtsdram(SDRAM_INITPLR14, 0x00000000);
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mtsdram(SDRAM_INITPLR15, 0x00000000);
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mtsdram(SDRAM_RDCC, 0x40000000);
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mtsdram(SDRAM_RQDC, 0x80000038);
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mtsdram(SDRAM_RFDC, 0x00000257);
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mtdcr(SDRAM_R0BAS, 0x0000F800); /* MQ0_B0BAS */
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mtdcr(SDRAM_R1BAS, 0x0400F800); /* MQ0_B1BAS */
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}
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phys_size_t initdram(int board_type)
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{
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/*
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* First try init for this module:
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*
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* Crucial CT6464AC667.8FB - 512MB SO-DIMM (dual rank)
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*/
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ddr_init_common();
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/*
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* Crucial CT6464AC667.8FB - 512MB SO-DIMM
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*/
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mtdcr(SDRAM_R0BAS, 0x0000F800);
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mtdcr(SDRAM_R1BAS, 0x0400F800);
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mtsdram(SDRAM_MCOPT1, 0x05122000);
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mtsdram(SDRAM_CODT, 0x02800021);
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mtsdram(SDRAM_MB1CF, 0x00000201);
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ddr_start();
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/*
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* Now test if the dual-ranked module is really installed
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* by checking an address in the upper 256MByte region
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*/
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out_be32((void *)TEST_ADDR, TEST_MAGIC);
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if (in_be32((void *)TEST_ADDR) != TEST_MAGIC) {
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/*
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* The test failed, so we assume that the single
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* ranked module is installed:
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*
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* Crucial CT6464AC667.4FE - 512MB SO-DIMM (single rank)
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*/
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ddr_init_common();
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mtdcr(SDRAM_R0BAS, 0x0000F000);
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mtsdram(SDRAM_MCOPT1, 0x05322000);
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mtsdram(SDRAM_CODT, 0x00800021);
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ddr_start();
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}
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return CONFIG_SYS_MBYTES_SDRAM << 20;
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}
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