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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2000-2003
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
* modified by Wolfgang Wegner <w.wegner@astro-kom.de> for ASTRO 5373l
*/
#include <common.h>
#include <init.h>
#include <serial.h>
#include <watchdog.h>
#include <command.h>
#include <asm/m5329.h>
#include <asm/immap_5329.h>
#include <asm/io.h>
#include <linux/delay.h>
/* needed for astro bus: */
#include <asm/uart.h>
#include "astro.h"
DECLARE_GLOBAL_DATA_PTR;
extern void uart_port_conf(void);
int checkboard(void)
{
puts("Board: ");
puts("ASTRO MCF5373L (Urmel) Board\n");
return 0;
}
int dram_init(void)
{
#if !defined(CONFIG_MONITOR_IS_IN_RAM)
sdram_t *sdp = (sdram_t *)(MMAP_SDRAM);
/*
* GPIO configuration for bus should be set correctly from reset,
* so we do not care! First, set up address space: at this point,
* we should be running from internal SRAM;
* so use CONFIG_SYS_SDRAM_BASE as the base address for SDRAM,
* and do not care where it is
*/
__raw_writel((CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | 0x00000018,
&sdp->cs0);
__raw_writel((CONFIG_SYS_SDRAM_BASE & 0xFFF00000) | 0x00000000,
&sdp->cs1);
/*
* I am not sure from the data sheet, but it seems burst length
* has to be 8 for the 16 bit data bus we use;
* so these values are for BL = 8
*/
__raw_writel(0x33211530, &sdp->cfg1);
__raw_writel(0x56570000, &sdp->cfg2);
/* send PrechargeALL, REF and IREF remain cleared! */
__raw_writel(0xE1462C02, &sdp->ctrl);
udelay(1);
/* refresh SDRAM twice */
__raw_writel(0xE1462C04, &sdp->ctrl);
udelay(1);
__raw_writel(0xE1462C04, &sdp->ctrl);
/* init MR */
__raw_writel(0x008D0000, &sdp->mode);
/* initialize EMR */
__raw_writel(0x80010000, &sdp->mode);
/* wait until DLL is locked */
udelay(1);
/*
* enable automatic refresh, lock mode register,
* clear iref and ipall
*/
__raw_writel(0x71462C00, &sdp->ctrl);
/* Dummy write to start SDRAM */
writel(0, CONFIG_SYS_SDRAM_BASE);
#endif
/*
* for get_ram_size() to work, both CS areas have to be
* configured, i.e. CS1 has to be explicitely disabled, else
* probing for memory will cause the SDRAM bus to hang!
* (Do not rely on the SDCS register(s) being set to 0x00000000
* during reset as stated in the data sheet.)
*/
gd->ram_size = get_ram_size((long *)CONFIG_SYS_SDRAM_BASE,
0x80000000 - CONFIG_SYS_SDRAM_BASE);
return 0;
}
#define UART_BASE MMAP_UART0
int rs_serial_init(int port, int baud)
{
uart_t *uart;
u32 counter;
switch (port) {
case 0:
uart = (uart_t *)(MMAP_UART0);
break;
case 1:
uart = (uart_t *)(MMAP_UART1);
break;
case 2:
uart = (uart_t *)(MMAP_UART2);
break;
default:
uart = (uart_t *)(MMAP_UART0);
}
uart_port_conf();
/* write to SICR: SIM2 = uart mode,dcd does not affect rx */
writeb(UART_UCR_RESET_RX, &uart->ucr);
writeb(UART_UCR_RESET_TX, &uart->ucr);
writeb(UART_UCR_RESET_ERROR, &uart->ucr);
writeb(UART_UCR_RESET_MR, &uart->ucr);
__asm__ ("nop");
writeb(0, &uart->uimr);
/* write to CSR: RX/TX baud rate from timers */
writeb(UART_UCSR_RCS_SYS_CLK | UART_UCSR_TCS_SYS_CLK, &uart->ucsr);
writeb(UART_UMR_BC_8 | UART_UMR_PM_NONE, &uart->umr);
writeb(UART_UMR_SB_STOP_BITS_1, &uart->umr);
/* Setting up BaudRate */
counter = (u32) (gd->bus_clk / (baud));
counter >>= 5;
/* write to CTUR: divide counter upper byte */
writeb((u8) ((counter & 0xff00) >> 8), &uart->ubg1);
/* write to CTLR: divide counter lower byte */
writeb((u8) (counter & 0x00ff), &uart->ubg2);
writeb(UART_UCR_RX_ENABLED | UART_UCR_TX_ENABLED, &uart->ucr);
return 0;
}
void astro_put_char(char ch)
{
uart_t *uart;
unsigned long timer;
uart = (uart_t *)(MMAP_UART0);
/*
* Wait for last character to go. Timeout of 6ms should
* be enough for our lowest baud rate of 2400.
*/
timer = get_timer(0);
while (get_timer(timer) < 6) {
if (readb(&uart->usr) & UART_USR_TXRDY)
break;
}
writeb(ch, &uart->utb);
return;
}
int astro_is_char(void)
{
uart_t *uart;
uart = (uart_t *)(MMAP_UART0);
return readb(&uart->usr) & UART_USR_RXRDY;
}
int astro_get_char(void)
{
uart_t *uart;
uart = (uart_t *)(MMAP_UART0);
while (!(readb(&uart->usr) & UART_USR_RXRDY)) ;
return readb(&uart->urb);
}
int misc_init_r(void)
{
int retval = 0;
puts("Configure Xilinx FPGA...");
retval = astro5373l_xilinx_load();
if (!retval) {
puts("failed!\n");
return retval;
}
puts("done\n");
puts("Configure Altera FPGA...");
retval = astro5373l_altera_load();
if (!retval) {
puts("failed!\n");
return retval;
}
puts("done\n");
return retval;
}
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