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https://github.com/brain-hackers/u-boot-brain
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bbeff30cbd
Historically the 405 U-Boot port had a dram_init() call in early init stage. This function was still called from start.S and most of the time coded in assembler. This is not needed anymore (since a long time) and boards should implement the common initdram() function in C instead. This patch now removed the dram_init() call from start.S and removes the empty implementations that are scattered through most of the 405 board ports. Some older board ports really implement this dram_init() though. These are: csb272 csb472 ERIC EXBITGEN W7OLMC W7OLMG I changed those boards to call this assembler dram_init() function now from their board specific initdram() instead. This *should* work, but please test again on those platforms. And it is perhaps a good idea that those boards use some common 405 SDRAM initialization code from cpu/ppc4xx at some time. So further patches welcome here. Signed-off-by: Stefan Roese <sr@denx.de>
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/*
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* (C) Copyright 2000-2005
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* Wolfgang Denk, DENX Software Engineering, wd@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 <asm/processor.h>
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#include <spd_sdram.h>
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int board_early_init_f(void)
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{
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/*-------------------------------------------------------------------------+
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| Interrupt controller setup for the Walnut/Sycamore board.
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| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
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| IRQ 16 405GP internally generated; active low; level sensitive
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| IRQ 17-24 RESERVED
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| IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
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| IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
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| IRQ 27 (EXT IRQ 2) Not Used
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| IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
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| IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
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| IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
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| IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
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| Note for Walnut board:
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| An interrupt taken for the FPGA (IRQ 25) indicates that either
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| the Mouse, Keyboard, IRDA, or External Expansion caused the
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| interrupt. The FPGA must be read to determine which device
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| caused the interrupt. The default setting of the FPGA clears
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+-------------------------------------------------------------------------*/
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mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
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mtdcr(uicer, 0x00000000); /* disable all ints */
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mtdcr(uiccr, 0x00000020); /* set all but FPGA SMI to be non-critical */
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mtdcr(uicpr, 0xFFFFFFE0); /* set int polarities */
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mtdcr(uictr, 0x10000000); /* set int trigger levels */
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mtdcr(uicvcr, 0x00000001); /* set vect base=0,INT0 highest priority */
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mtdcr(uicsr, 0xFFFFFFFF); /* clear all ints */
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/* set UART1 control to select CTS/RTS */
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#define FPGA_BRDC 0xF0300004
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*(volatile char *)(FPGA_BRDC) |= 0x1;
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return 0;
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}
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/*
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* Check Board Identity:
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*/
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int checkboard(void)
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{
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char *s = getenv("serial#");
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uint pvr = get_pvr();
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if (pvr == PVR_405GPR_RB) {
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puts("Board: Sycamore - AMCC PPC405GPr Evaluation Board");
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} else {
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puts("Board: Walnut - AMCC PPC405GP Evaluation Board");
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}
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if (s != NULL) {
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puts(", serial# ");
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puts(s);
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}
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putc('\n');
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return (0);
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}
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/*
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* initdram(int board_type) reads EEPROM via I2c. EEPROM contains all of
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* the necessary info for SDRAM controller configuration
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*/
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long int initdram(int board_type)
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{
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return spd_sdram();
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}
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