mirror of
https://github.com/AsahiLinux/u-boot
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138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* (C) Copyright 2004
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* Tolunay Orkun, Nextio Inc., torkun@nextio.com
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <asm/processor.h>
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#include <i2c.h>
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#include <miiphy.h>
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#include <asm/ppc4xx-emac.h>
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void sdram_init(void);
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/*
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* board_early_init_f: do early board initialization
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*
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*/
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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 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 (UIC0SR, 0xFFFFFFFF); /* clear all ints */
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mtdcr (UIC0ER, 0x00000000); /* disable all ints */
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mtdcr (UIC0CR, 0x00000000); /* set all to be non-critical */
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mtdcr (UIC0PR, 0xFFFFFF83); /* set int polarities */
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mtdcr (UIC0TR, 0x10000000); /* set int trigger levels */
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mtdcr (UIC0VCR, 0x00000001); /* set vect base=0,INT0 highest priority */
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mtdcr (UIC0SR, 0xFFFFFFFF); /* clear all ints */
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mtebc (EBC0_CFG, 0xa8400000); /* EBC always driven */
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return 0; /* success */
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}
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/*
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* checkboard: identify/verify the board we are running
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*
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* Remark: we just assume it is correct board here!
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*
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*/
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int checkboard(void)
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{
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printf("BOARD: Cogent CSB472\n");
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return 0; /* success */
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}
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/*
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* initram: Determine the size of mounted DRAM
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*
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* Size is determined by reading SDRAM configuration registers as
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* configured by initialization code
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*
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*/
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phys_size_t initdram (int board_type)
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{
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ulong tot_size;
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ulong bank_size;
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ulong tmp;
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/*
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* ToDo: Move the asm init routine sdram_init() to this C file,
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* or even better use some common ppc4xx code available
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* in arch/powerpc/cpu/ppc4xx
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*/
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sdram_init();
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tot_size = 0;
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mtdcr (SDRAM0_CFGADDR, SDRAM0_B0CR);
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tmp = mfdcr (SDRAM0_CFGDATA);
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if (tmp & 0x00000001) {
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bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
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tot_size += bank_size;
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}
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mtdcr (SDRAM0_CFGADDR, SDRAM0_B1CR);
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tmp = mfdcr (SDRAM0_CFGDATA);
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if (tmp & 0x00000001) {
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bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
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tot_size += bank_size;
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}
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mtdcr (SDRAM0_CFGADDR, SDRAM0_B2CR);
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tmp = mfdcr (SDRAM0_CFGDATA);
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if (tmp & 0x00000001) {
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bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
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tot_size += bank_size;
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}
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mtdcr (SDRAM0_CFGADDR, SDRAM0_B3CR);
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tmp = mfdcr (SDRAM0_CFGDATA);
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if (tmp & 0x00000001) {
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bank_size = 0x00400000 << ((tmp >> 17) & 0x7);
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tot_size += bank_size;
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}
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return tot_size;
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}
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/*
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* last_stage_init: final configurations (such as PHY etc)
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*
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*/
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int last_stage_init(void)
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{
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/* initialize the PHY */
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miiphy_reset("ppc_4xx_eth0", CONFIG_PHY_ADDR);
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/* AUTO neg */
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miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_BMCR,
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BMCR_ANENABLE | BMCR_ANRESTART);
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/* LEDs */
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miiphy_write("ppc_4xx_eth0", CONFIG_PHY_ADDR, MII_NWAYTEST, 0x0d08);
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return 0; /* success */
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}
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