/* * 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/system.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); static int mvme147_get_hardware_list(char *buffer); extern void mvme147_sched_init(irq_handler_t handler); extern unsigned long mvme147_gettimeoffset (void); extern int mvme147_hwclk (int, struct rtc_time *); extern int mvme147_set_clock_mmss (unsigned long); extern void mvme147_reset (void); extern void mvme147_waitbut(void); static int bcd2int (unsigned char b); /* Save tick handler routine pointer, will point to do_timer() in * kernel/sched.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"); } static int mvme147_get_hardware_list(char *buffer) { *buffer = '\0'; return 0; } /* * This function is called during kernel startup to initialize * the mvme147 IRQ handling routines. */ void mvme147_init_IRQ(void) { m68k_setup_user_interrupt(VEC_USER, 192, NULL); } void __init config_mvme147(void) { mach_max_dma_address = 0x01000000; mach_sched_init = mvme147_sched_init; mach_init_IRQ = mvme147_init_IRQ; mach_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; mach_get_hardware_list = mvme147_get_hardware_list; /* 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; request_irq (PCC_IRQ_TIMER1, mvme147_timer_int, IRQ_FLG_REPLACE, "timer 1", NULL); /* 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 */ unsigned long 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; } 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; }