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https://github.com/u-boot/u-boot.git
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3765b3e7bd
Signed-off-by: Wolfgang Denk <wd@denx.de>
152 lines
4.9 KiB
C
152 lines
4.9 KiB
C
/*
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* Copyright (C) 2002 Scott McNutt <smcnutt@artesyncp.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 <spd_sdram.h>
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#define BOOT_SMALL_FLASH 32 /* 00100000 */
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#define FLASH_ONBD_N 2 /* 00000010 */
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#define FLASH_SRAM_SEL 1 /* 00000001 */
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DECLARE_GLOBAL_DATA_PTR;
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long int fixed_sdram(void);
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int board_early_init_f(void)
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{
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uint reg;
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unsigned char *fpga_base = (unsigned char *)CONFIG_SYS_FPGA_BASE;
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unsigned char status;
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/*--------------------------------------------------------------------
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* Setup the external bus controller/chip selects
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*-------------------------------------------------------------------*/
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mtdcr(EBC0_CFGADDR, EBC0_CFG);
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reg = mfdcr(EBC0_CFGDATA);
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mtdcr(EBC0_CFGDATA, reg | 0x04000000); /* Set ATC */
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mtebc(PB1AP, 0x02815480); /* NVRAM/RTC */
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mtebc(PB1CR, 0x48018000); /* BA=0x480 1MB R/W 8-bit */
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mtebc(PB7AP, 0x01015280); /* FPGA registers */
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mtebc(PB7CR, 0x48318000); /* BA=0x483 1MB R/W 8-bit */
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/* read FPGA_REG0 and set the bus controller */
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status = *fpga_base;
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if ((status & BOOT_SMALL_FLASH) && !(status & FLASH_ONBD_N)) {
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mtebc(PB0AP, 0x9b015480); /* FLASH/SRAM */
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mtebc(PB0CR, 0xfff18000); /* BAS=0xfff 1MB R/W 8-bit */
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mtebc(PB2AP, 0x9b015480); /* 4MB FLASH */
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mtebc(PB2CR, 0xff858000); /* BAS=0xff8 4MB R/W 8-bit */
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} else {
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mtebc(PB0AP, 0x9b015480); /* 4MB FLASH */
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mtebc(PB0CR, 0xffc58000); /* BAS=0xffc 4MB R/W 8-bit */
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/* set CS2 if FLASH_ONBD_N == 0 */
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if (!(status & FLASH_ONBD_N)) {
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mtebc(PB2AP, 0x9b015480); /* FLASH/SRAM */
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mtebc(PB2CR, 0xff818000); /* BAS=0xff8 4MB R/W 8-bit */
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}
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}
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/*--------------------------------------------------------------------
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* Setup the interrupt controller polarities, triggers, etc.
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*-------------------------------------------------------------------*/
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mtdcr(UIC0SR, 0xffffffff); /* clear all */
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mtdcr(UIC0ER, 0x00000000); /* disable all */
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mtdcr(UIC0CR, 0x00000009); /* SMI & UIC1 crit are critical */
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mtdcr(UIC0PR, 0xfffffe13); /* per ref-board manual */
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mtdcr(UIC0TR, 0x01c00008); /* per ref-board manual */
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mtdcr(UIC0VR, 0x00000001); /* int31 highest, base=0x000 */
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mtdcr(UIC0SR, 0xffffffff); /* clear all */
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mtdcr(UIC1SR, 0xffffffff); /* clear all */
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mtdcr(UIC1ER, 0x00000000); /* disable all */
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mtdcr(UIC1CR, 0x00000000); /* all non-critical */
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mtdcr(UIC1PR, 0xffffe0ff); /* per ref-board manual */
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mtdcr(UIC1TR, 0x00ffc000); /* per ref-board manual */
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mtdcr(UIC1VR, 0x00000001); /* int31 highest, base=0x000 */
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mtdcr(UIC1SR, 0xffffffff); /* clear all */
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return 0;
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}
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int checkboard(void)
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{
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char buf[64];
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int i = getenv_f("serial#", buf, sizeof(buf));
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printf("Board: Ebony - AMCC PPC440GP Evaluation Board");
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if (i > 0) {
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puts(", serial# ");
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puts(buf);
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}
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putc('\n');
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return (0);
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}
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phys_size_t initdram(int board_type)
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{
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long dram_size = 0;
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#if defined(CONFIG_SPD_EEPROM)
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dram_size = spd_sdram();
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#else
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dram_size = fixed_sdram();
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#endif
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return dram_size;
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}
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#if !defined(CONFIG_SPD_EEPROM)
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/*************************************************************************
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* fixed sdram init -- doesn't use serial presence detect.
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*
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* Assumes: 128 MB, non-ECC, non-registered
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* PLB @ 133 MHz
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*
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************************************************************************/
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long int fixed_sdram(void)
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{
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uint reg;
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/*--------------------------------------------------------------------
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* Setup some default
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*------------------------------------------------------------------*/
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mtsdram(SDRAM0_UABBA, 0x00000000); /* ubba=0 (default) */
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mtsdram(SDRAM0_SLIO, 0x00000000); /* rdre=0 wrre=0 rarw=0 */
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mtsdram(SDRAM0_DEVOPT, 0x00000000); /* dll=0 ds=0 (normal) */
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mtsdram(SDRAM0_WDDCTR, 0x00000000); /* wrcp=0 dcd=0 */
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mtsdram(SDRAM0_CLKTR, 0x40000000); /* clkp=1 (90 deg wr) dcdt=0 */
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/*--------------------------------------------------------------------
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* Setup for board-specific specific mem
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*------------------------------------------------------------------*/
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/*
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* Following for CAS Latency = 2.5 @ 133 MHz PLB
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*/
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mtsdram(SDRAM0_B0CR, 0x000a4001); /* SDBA=0x000 128MB, Mode 3, enabled */
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mtsdram(SDRAM0_TR0, 0x410a4012); /* WR=2 WD=1 CL=2.5 PA=3 CP=4 LD=2 */
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/* RA=10 RD=3 */
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mtsdram(SDRAM0_TR1, 0x8080082f); /* SS=T2 SL=STAGE 3 CD=1 CT=0x02f */
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mtsdram(SDRAM0_RTR, 0x08200000); /* Rate 15.625 ns @ 133 MHz PLB */
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mtsdram(SDRAM0_CFG1, 0x00000000); /* Self-refresh exit, disable PM */
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udelay(400); /* Delay 200 usecs (min) */
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/*--------------------------------------------------------------------
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* Enable the controller, then wait for DCEN to complete
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*------------------------------------------------------------------*/
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mtsdram(SDRAM0_CFG0, 0x86000000); /* DCEN=1, PMUD=1, 64-bit */
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for (;;) {
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mfsdram(SDRAM0_MCSTS, reg);
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if (reg & 0x80000000)
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break;
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}
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return (128 * 1024 * 1024); /* 128 MB */
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}
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#endif /* !defined(CONFIG_SPD_EEPROM) */
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