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/*
* arch/m68k/mvme147/config.c
*
* Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
* Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
*
* Based on:
*
* Copyright (C) 1993 Hamish Macdonald
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file README.legal in the main directory of this archive
* for more details.
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/rtc.h>
#include <linux/interrupt.h>
#include <asm/bootinfo.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/rtc.h>
#include <asm/machdep.h>
#include <asm/mvme147hw.h>
static void mvme147_get_model(char *model);
extern void mvme147_sched_init(irq_handler_t handler);
extern u32 mvme147_gettimeoffset(void);
extern int mvme147_hwclk (int, struct rtc_time *);
extern int mvme147_set_clock_mmss (unsigned long);
extern void mvme147_reset (void);
static int bcd2int (unsigned char b);
/* Save tick handler routine pointer, will point to xtime_update() in
* kernel/time/timekeeping.c, called via mvme147_process_int() */
irq_handler_t tick_handler;
int mvme147_parse_bootinfo(const struct bi_record *bi)
{
if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
return 0;
else
return 1;
}
void mvme147_reset(void)
{
printk ("\r\n\nCalled mvme147_reset\r\n");
m147_pcc->watchdog = 0x0a; /* Clear timer */
m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
while (1)
;
}
static void mvme147_get_model(char *model)
{
sprintf(model, "Motorola MVME147");
}
/*
* This function is called during kernel startup to initialize
* the mvme147 IRQ handling routines.
*/
void __init mvme147_init_IRQ(void)
{
m68k_setup_user_interrupt(VEC_USER, 192);
}
void __init config_mvme147(void)
{
mach_max_dma_address = 0x01000000;
mach_sched_init = mvme147_sched_init;
mach_init_IRQ = mvme147_init_IRQ;
arch_gettimeoffset = mvme147_gettimeoffset;
mach_hwclk = mvme147_hwclk;
mach_set_clock_mmss = mvme147_set_clock_mmss;
mach_reset = mvme147_reset;
mach_get_model = mvme147_get_model;
/* Board type is only set by newer versions of vmelilo/tftplilo */
if (!vme_brdtype)
vme_brdtype = VME_TYPE_MVME147;
}
/* Using pcc tick timer 1 */
static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
{
m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
return tick_handler(irq, dev_id);
}
void mvme147_sched_init (irq_handler_t timer_routine)
{
tick_handler = timer_routine;
if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1", NULL))
pr_err("Couldn't register timer interrupt\n");
/* Init the clock with a value */
/* our clock goes off every 6.25us */
m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
m147_pcc->t1_cntrl = 0x0; /* clear timer */
m147_pcc->t1_cntrl = 0x3; /* start timer */
m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
}
/* This is always executed with interrupts disabled. */
/* XXX There are race hazards in this code XXX */
u32 mvme147_gettimeoffset(void)
{
volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
unsigned short n;
n = *cp;
while (n != *cp)
n = *cp;
n -= PCC_TIMER_PRELOAD;
return ((unsigned long)n * 25 / 4) * 1000;
}
static int bcd2int (unsigned char b)
{
return ((b>>4)*10 + (b&15));
}
int mvme147_hwclk(int op, struct rtc_time *t)
{
#warning check me!
if (!op) {
m147_rtc->ctrl = RTC_READ;
t->tm_year = bcd2int (m147_rtc->bcd_year);
t->tm_mon = bcd2int (m147_rtc->bcd_mth);
t->tm_mday = bcd2int (m147_rtc->bcd_dom);
t->tm_hour = bcd2int (m147_rtc->bcd_hr);
t->tm_min = bcd2int (m147_rtc->bcd_min);
t->tm_sec = bcd2int (m147_rtc->bcd_sec);
m147_rtc->ctrl = 0;
}
return 0;
}
int mvme147_set_clock_mmss (unsigned long nowtime)
{
return 0;
}
/*------------------- Serial console stuff ------------------------*/
static void scc_delay (void)
{
int n;
volatile int trash;
for (n = 0; n < 20; n++)
trash = n;
}
static void scc_write (char ch)
{
volatile char *p = (volatile char *)M147_SCC_A_ADDR;
do {
scc_delay();
}
while (!(*p & 4));
scc_delay();
*p = 8;
scc_delay();
*p = ch;
}
void m147_scc_write (struct console *co, const char *str, unsigned count)
{
unsigned long flags;
local_irq_save(flags);
while (count--)
{
if (*str == '\n')
scc_write ('\r');
scc_write (*str++);
}
local_irq_restore(flags);
}
void mvme147_init_console_port (struct console *co, int cflag)
{
co->write = m147_scc_write;
}
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