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/*
* Copyright (C) 2010 Scott Nicholas <neutronscott@scottn.us>
*
* based on work of rb532 prom.c
* Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
* Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
* Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
* Felix Fietkau <nbd@openwrt.org>
* Florian Fainelli <florian@openwrt.org>
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/console.h>
#include <linux/string.h>
#include <linux/serial_core.h>
#include <asm/bootinfo.h>
#include <adm8668.h>
#include "u-boot.h"
register volatile struct global_data *gd asm ("k0");
#ifdef CONFIG_SERIAL_ADM8668_CONSOLE
static inline unsigned int adm_uart_readl(unsigned int offset)
{
return (*(volatile unsigned int *)(0xbe400000 + offset));
}
static inline void adm_uart_writel(unsigned int value, unsigned int offset)
{
(*((volatile unsigned int *)(0xbe400000 + offset))) = value;
}
static void prom_putchar(char c)
{
adm_uart_writel(c, UART_DR_REG);
while ((adm_uart_readl(UART_FR_REG) & UART_TX_FIFO_FULL) != 0)
;
}
static void __init
early_console_write(struct console *con, const char *s, unsigned n)
{
while (n-- && *s) {
if (*s == '\n')
prom_putchar('\r');
prom_putchar(*s);
s++;
}
}
static struct console early_console __initdata = {
.name = "early",
.write = early_console_write,
.flags = CON_BOOT,
.index = -1
};
#endif
void __init prom_free_prom_memory(void)
{
/* No prom memory to free */
}
static inline int match_tag(char *arg, const char *tag)
{
return strncmp(arg, tag, strlen(tag)) == 0;
}
static inline unsigned long tag2ul(char *arg, const char *tag)
{
char *num;
num = arg + strlen(tag);
return simple_strtoul(num, 0, 10);
}
void __init prom_setup_cmdline(void)
{
char *cp;
int prom_argc;
char **prom_argv;
int i;
prom_argc = fw_arg0;
prom_argv = (char **)KSEG0ADDR(fw_arg1);
cp = &(arcs_cmdline[0]);
for (i = 1; i < prom_argc; i++) {
prom_argv[i] = (char *)KSEG0ADDR(prom_argv[i]);
/* default bootargs has "console=/dev/ttyS0" yet console won't
* show up at all if you include the '/dev/' nowadays ... */
if (match_tag(prom_argv[i], "console=/dev/")) {
char *ptr = prom_argv[i] + strlen("console=/dev/");
strcpy(cp, "console=");
cp += strlen("console=");
strcpy(cp, ptr);
cp += strlen(ptr);
*cp++ = ' ';
continue;
}
strcpy(cp, prom_argv[i]);
cp += strlen(prom_argv[i]);
*cp++ = ' ';
}
if (prom_argc > 1)
--cp; /* trailing space */
*cp = '\0';
}
void __init prom_init(void)
{
bd_t *bd = gd->bd;
int memsize;
#ifdef CONFIG_SERIAL_ADM8668_CONSOLE
register_console(&early_console);
#endif
memsize = bd->bi_memsize;
printk("Board info:\n");
printk(" RAM size: %d MB\n", (int)memsize/(1024*1024));
printk(" NOR start: %#lx\n", bd->bi_flashstart);
printk(" NOR size: %#lx\n", bd->bi_flashsize);
prom_setup_cmdline();
add_memory_region(0, memsize, BOOT_MEM_RAM);
}
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