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/*
* (C) Copyright 2000-2005
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/processor.h>
#include <spd_sdram.h>
DECLARE_GLOBAL_DATA_PTR;
int board_early_init_f(void)
{
/*-------------------------------------------------------------------------+
| Interrupt controller setup for the Walnut/Sycamore board.
| Note: IRQ 0-15 405GP internally generated; active high; level sensitive
| IRQ 16 405GP internally generated; active low; level sensitive
| IRQ 17-24 RESERVED
| IRQ 25 (EXT IRQ 0) FPGA; active high; level sensitive
| IRQ 26 (EXT IRQ 1) SMI; active high; level sensitive
| IRQ 27 (EXT IRQ 2) Not Used
| IRQ 28 (EXT IRQ 3) PCI SLOT 3; active low; level sensitive
| IRQ 29 (EXT IRQ 4) PCI SLOT 2; active low; level sensitive
| IRQ 30 (EXT IRQ 5) PCI SLOT 1; active low; level sensitive
| IRQ 31 (EXT IRQ 6) PCI SLOT 0; active low; level sensitive
| Note for Walnut board:
| An interrupt taken for the FPGA (IRQ 25) indicates that either
| the Mouse, Keyboard, IRDA, or External Expansion caused the
| interrupt. The FPGA must be read to determine which device
| caused the interrupt. The default setting of the FPGA clears
|
+-------------------------------------------------------------------------*/
mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
mtdcr(UIC0ER, 0x00000000); /* disable all ints */
mtdcr(UIC0CR, 0x00000020); /* set all but FPGA SMI to be non-critical */
mtdcr(UIC0PR, 0xFFFFFFE0); /* set int polarities */
mtdcr(UIC0TR, 0x10000000); /* set int trigger levels */
mtdcr(UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
mtdcr(UIC0SR, 0xFFFFFFFF); /* clear all ints */
/* set UART1 control to select CTS/RTS */
#define FPGA_BRDC 0xF0300004
*(volatile char *)(FPGA_BRDC) |= 0x1;
return 0;
}
/*
* Check Board Identity:
*/
int checkboard(void)
{
char buf[64];
int i = getenv_f("serial#", buf, sizeof(buf));
uint pvr = get_pvr();
if (pvr == PVR_405GPR_RB) {
puts("Board: Sycamore - AMCC PPC405GPr Evaluation Board");
} else {
puts("Board: Walnut - AMCC PPC405GP Evaluation Board");
}
if (i > 0) {
puts(", serial# ");
puts(buf);
}
putc('\n');
return (0);
}
/*
* dram_init() reads EEPROM via I2c. EEPROM contains all of
* the necessary info for SDRAM controller configuration
*/
int dram_init(void)
{
gd->ram_size = spd_sdram();
return 0;
}
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