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/*
* IP32 basic setup
*
* 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.
*
* Copyright (C) 2000 Harald Koerfgen
* Copyright (C) 2002, 2003, 2005 Ilya A. Volynets
*/
#include <linux/config.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mc146818rtc.h>
#include <linux/param.h>
#include <linux/sched.h>
#include <asm/bootinfo.h>
#include <asm/mc146818-time.h>
#include <asm/mipsregs.h>
#include <asm/mmu_context.h>
#include <asm/sgialib.h>
#include <asm/time.h>
#include <asm/traps.h>
#include <asm/io.h>
#include <asm/ip32/crime.h>
#include <asm/ip32/mace.h>
#include <asm/ip32/ip32_ints.h>
extern void ip32_be_init(void);
extern void crime_init(void);
#ifdef CONFIG_SGI_O2MACE_ETH
/*
* This is taken care of in here 'cause they say using Arc later on is
* problematic
*/
extern char o2meth_eaddr[8];
static inline unsigned char str2hexnum(unsigned char c)
{
if (c >= '0' && c <= '9')
return c - '0';
if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
return 0; /* foo */
}
static inline void str2eaddr(unsigned char *ea, unsigned char *str)
{
int i;
for (i = 0; i < 6; i++) {
unsigned char num;
if(*str == ':')
str++;
num = str2hexnum(*str++) << 4;
num |= (str2hexnum(*str++));
ea[i] = num;
}
}
#endif
#ifdef CONFIG_SERIAL_8250
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
extern int early_serial_setup(struct uart_port *port);
#define STD_COM_FLAGS (ASYNC_SKIP_TEST)
#define BASE_BAUD (1843200 / 16)
#endif /* CONFIG_SERIAL_8250 */
/* An arbitrary time; this can be decreased if reliability looks good */
#define WAIT_MS 10
void __init ip32_time_init(void)
{
printk(KERN_INFO "Calibrating system timer... ");
write_c0_count(0);
crime->timer = 0;
while (crime->timer < CRIME_MASTER_FREQ * WAIT_MS / 1000) ;
mips_hpt_frequency = read_c0_count() * 1000 / WAIT_MS;
printk("%d MHz CPU detected\n", mips_hpt_frequency * 2 / 1000000);
}
void __init ip32_timer_setup(struct irqaction *irq)
{
irq->handler = no_action;
setup_irq(IP32_R4K_TIMER_IRQ, irq);
}
static int __init ip32_setup(void)
{
board_be_init = ip32_be_init;
rtc_get_time = mc146818_get_cmos_time;
rtc_set_mmss = mc146818_set_rtc_mmss;
board_time_init = ip32_time_init;
board_timer_setup = ip32_timer_setup;
#ifdef CONFIG_SERIAL_8250
{
static struct uart_port o2_serial[2];
memset(o2_serial, 0, sizeof(o2_serial));
o2_serial[0].type = PORT_16550A;
o2_serial[0].line = 0;
o2_serial[0].irq = MACEISA_SERIAL1_IRQ;
o2_serial[0].flags = STD_COM_FLAGS;
o2_serial[0].uartclk = BASE_BAUD * 16;
o2_serial[0].iotype = UPIO_MEM;
o2_serial[0].membase = (char *)&mace->isa.serial1;
o2_serial[0].fifosize = 14;
/* How much to shift register offset by. Each UART register
* is replicated over 256 byte space */
o2_serial[0].regshift = 8;
o2_serial[1].type = PORT_16550A;
o2_serial[1].line = 1;
o2_serial[1].irq = MACEISA_SERIAL2_IRQ;
o2_serial[1].flags = STD_COM_FLAGS;
o2_serial[1].uartclk = BASE_BAUD * 16;
o2_serial[1].iotype = UPIO_MEM;
o2_serial[1].membase = (char *)&mace->isa.serial2;
o2_serial[1].fifosize = 14;
o2_serial[1].regshift = 8;
early_serial_setup(&o2_serial[0]);
early_serial_setup(&o2_serial[1]);
}
#endif
#ifdef CONFIG_SGI_O2MACE_ETH
{
char *mac = ArcGetEnvironmentVariable("eaddr");
str2eaddr(o2meth_eaddr, mac);
}
#endif
#if defined(CONFIG_SERIAL_CORE_CONSOLE)
{
char* con = ArcGetEnvironmentVariable("console");
if (con && *con == 'd') {
static char options[8];
char *baud = ArcGetEnvironmentVariable("dbaud");
if (baud)
strcpy(options, baud);
add_preferred_console("ttyS", *(con + 1) == '2' ? 1 : 0,
baud ? options : NULL);
}
}
#endif
return 0;
}
early_initcall(ip32_setup);
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