mirror of
https://github.com/AsahiLinux/u-boot
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212 lines
5.2 KiB
C
212 lines
5.2 KiB
C
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/*
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* (C) Copyright 2000-2003
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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* modified by Wolfgang Wegner <w.wegner@astro-kom.de> for ASTRO 5373l
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#include <common.h>
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#include <watchdog.h>
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#include <command.h>
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#include <asm/m5329.h>
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#include <asm/immap_5329.h>
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#include <asm/io.h>
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/* needed for astro bus: */
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#include <asm/uart.h>
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#include "astro.h"
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DECLARE_GLOBAL_DATA_PTR;
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extern void uart_port_conf(void);
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int checkboard(void)
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{
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puts("Board: ");
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puts("ASTRO MCF5373L (Urmel) Board\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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#if !defined(CONFIG_MONITOR_IS_IN_RAM)
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sdram_t *sdp = (sdram_t *)(MMAP_SDRAM);
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/*
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* GPIO configuration for bus should be set correctly from reset,
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* so we do not care! First, set up address space: at this point,
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* we should be running from internal SRAM;
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* so use CONFIG_SYS_SDRAM_BASE as the base address for SDRAM,
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* and do not care where it is
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*/
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__raw_writel((CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | 0x00000018,
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&sdp->cs0);
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__raw_writel((CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | 0x00000000,
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&sdp->cs1);
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/*
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* I am not sure from the data sheet, but it seems burst length
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* has to be 8 for the 16 bit data bus we use;
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* so these values are for BL = 8
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*/
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__raw_writel(0x33211530, &sdp->cfg1);
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__raw_writel(0x56570000, &sdp->cfg2);
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/* send PrechargeALL, REF and IREF remain cleared! */
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__raw_writel(0xE1462C02, &sdp->ctrl);
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udelay(1);
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/* refresh SDRAM twice */
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__raw_writel(0xE1462C04, &sdp->ctrl);
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udelay(1);
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__raw_writel(0xE1462C04, &sdp->ctrl);
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/* init MR */
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__raw_writel(0x008D0000, &sdp->mode);
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/* initialize EMR */
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__raw_writel(0x80010000, &sdp->mode);
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/* wait until DLL is locked */
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udelay(1);
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/*
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* enable automatic refresh, lock mode register,
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* clear iref and ipall
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*/
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__raw_writel(0x71462C00, &sdp->ctrl);
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/* Dummy write to start SDRAM */
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writel(0, CONFIG_SYS_SDRAM_BASE);
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#endif
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/*
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* for get_ram_size() to work, both CS areas have to be
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* configured, i.e. CS1 has to be explicitely disabled, else
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* probing for memory will cause the SDRAM bus to hang!
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* (Do not rely on the SDCS register(s) being set to 0x00000000
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* during reset as stated in the data sheet.)
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*/
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return get_ram_size((unsigned long *)CONFIG_SYS_SDRAM_BASE,
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0x80000000 - CONFIG_SYS_SDRAM_BASE);
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}
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#define UART_BASE MMAP_UART0
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int rs_serial_init(int port, int baud)
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{
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uart_t *uart;
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u32 counter;
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switch (port) {
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case 0:
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uart = (uart_t *)(MMAP_UART0);
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break;
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case 1:
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uart = (uart_t *)(MMAP_UART1);
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break;
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case 2:
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uart = (uart_t *)(MMAP_UART2);
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break;
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default:
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uart = (uart_t *)(MMAP_UART0);
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}
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uart_port_conf();
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/* write to SICR: SIM2 = uart mode,dcd does not affect rx */
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writeb(UART_UCR_RESET_RX, &uart->ucr);
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writeb(UART_UCR_RESET_TX, &uart->ucr);
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writeb(UART_UCR_RESET_ERROR, &uart->ucr);
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writeb(UART_UCR_RESET_MR, &uart->ucr);
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__asm__ ("nop");
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writeb(0, &uart->uimr);
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/* write to CSR: RX/TX baud rate from timers */
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writeb(UART_UCSR_RCS_SYS_CLK | UART_UCSR_TCS_SYS_CLK, &uart->ucsr);
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writeb(UART_UMR_BC_8 | UART_UMR_PM_NONE, &uart->umr);
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writeb(UART_UMR_SB_STOP_BITS_1, &uart->umr);
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/* Setting up BaudRate */
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counter = (u32) (gd->bus_clk / (baud));
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counter >>= 5;
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/* write to CTUR: divide counter upper byte */
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writeb((u8) ((counter & 0xff00) >> 8), &uart->ubg1);
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/* write to CTLR: divide counter lower byte */
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writeb((u8) (counter & 0x00ff), &uart->ubg2);
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writeb(UART_UCR_RX_ENABLED | UART_UCR_TX_ENABLED, &uart->ucr);
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return 0;
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}
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void astro_put_char(char ch)
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{
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uart_t *uart;
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unsigned long timer;
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uart = (uart_t *)(MMAP_UART0);
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/*
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* Wait for last character to go. Timeout of 6ms should
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* be enough for our lowest baud rate of 2400.
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*/
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timer = get_timer(0);
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while (get_timer(timer) < 6) {
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if (readb(&uart->usr) & UART_USR_TXRDY)
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break;
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}
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writeb(ch, &uart->utb);
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return;
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}
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int astro_is_char(void)
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{
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uart_t *uart;
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uart = (uart_t *)(MMAP_UART0);
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return readb(&uart->usr) & UART_USR_RXRDY;
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}
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int astro_get_char(void)
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{
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uart_t *uart;
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uart = (uart_t *)(MMAP_UART0);
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while (!(readb(&uart->usr) & UART_USR_RXRDY)) ;
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return readb(&uart->urb);
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}
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int misc_init_r(void)
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{
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int retval = 0;
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puts("Configure Xilinx FPGA...");
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retval = astro5373l_xilinx_load();
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if (!retval) {
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puts("failed!\n");
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return retval;
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}
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puts("done\n");
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puts("Configure Altera FPGA...");
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retval = astro5373l_altera_load();
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if (!retval) {
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puts("failed!\n");
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return retval;
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}
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puts("done\n");
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return retval;
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}
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