mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-30 00:21:06 +00:00
138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
|
|
* (C) Copyright 2004
|
|
* Tolunay Orkun, Nextio Inc., torkun@nextio.com
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/processor.h>
|
|
#include <i2c.h>
|
|
#include <miiphy.h>
|
|
#include <asm/ppc4xx-emac.h>
|
|
|
|
void sdram_init(void);
|
|
|
|
/*
|
|
* board_early_init_f: do early board initialization
|
|
*
|
|
*/
|
|
int board_early_init_f(void)
|
|
{
|
|
/*-------------------------------------------------------------------------+
|
|
| Interrupt controller setup for the Walnut 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, 0x00000000); /* set all to be non-critical */
|
|
mtdcr (UIC0PR, 0xFFFFFF83); /* 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 */
|
|
|
|
mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */
|
|
|
|
return 0; /* success */
|
|
}
|
|
|
|
/*
|
|
* checkboard: identify/verify the board we are running
|
|
*
|
|
* Remark: we just assume it is correct board here!
|
|
*
|
|
*/
|
|
int checkboard(void)
|
|
{
|
|
printf("BOARD: Cogent CSB472\n");
|
|
|
|
return 0; /* success */
|
|
}
|
|
|
|
/*
|
|
* initram: Determine the size of mounted DRAM
|
|
*
|
|
* Size is determined by reading SDRAM configuration registers as
|
|
* configured by initialization code
|
|
*
|
|
*/
|
|
phys_size_t initdram (int board_type)
|
|
{
|
|
ulong tot_size;
|
|
ulong bank_size;
|
|
ulong tmp;
|
|
|
|
/*
|
|
* ToDo: Move the asm init routine sdram_init() to this C file,
|
|
* or even better use some common ppc4xx code available
|
|
* in arch/powerpc/cpu/ppc4xx
|
|
*/
|
|
sdram_init();
|
|
|
|
tot_size = 0;
|
|
|
|
mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
|
|
tmp = mfdcr (SDRAM0_CFGDATA);
|
|
if (tmp & 0x00000001) {
|
|
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
|
|
tot_size += bank_size;
|
|
}
|
|
|
|
mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
|
|
tmp = mfdcr (SDRAM0_CFGDATA);
|
|
if (tmp & 0x00000001) {
|
|
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
|
|
tot_size += bank_size;
|
|
}
|
|
|
|
mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
|
|
tmp = mfdcr (SDRAM0_CFGDATA);
|
|
if (tmp & 0x00000001) {
|
|
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
|
|
tot_size += bank_size;
|
|
}
|
|
|
|
mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
|
|
tmp = mfdcr (SDRAM0_CFGDATA);
|
|
if (tmp & 0x00000001) {
|
|
bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
|
|
tot_size += bank_size;
|
|
}
|
|
|
|
return tot_size;
|
|
}
|
|
|
|
/*
|
|
* last_stage_init: final configurations (such as PHY etc)
|
|
*
|
|
*/
|
|
int last_stage_init(void)
|
|
{
|
|
/* initialize the PHY */
|
|
miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR);
|
|
|
|
/* AUTO neg */
|
|
miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_BMCR,
|
|
BMCR_ANENABLE | BMCR_ANRESTART);
|
|
|
|
/* LEDs */
|
|
miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_NWAYTEST, 0x0d08);
|
|
|
|
return 0; /* success */
|
|
}
|