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/*
* (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 */
}
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