diff options
Diffstat (limited to 'arch/m68k/mvme147')
| -rw-r--r-- | arch/m68k/mvme147/Makefile | 5 | ||||
| -rw-r--r-- | arch/m68k/mvme147/config.c | 213 |
2 files changed, 218 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/Makefile b/arch/m68k/mvme147/Makefile new file mode 100644 index 00000000..a36d38db --- /dev/null +++ b/arch/m68k/mvme147/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for Linux arch/m68k/mvme147 source directory +# + +obj-y := config.o diff --git a/arch/m68k/mvme147/config.c b/arch/m68k/mvme147/config.c new file mode 100644 index 00000000..a41c0914 --- /dev/null +++ b/arch/m68k/mvme147/config.c @@ -0,0 +1,213 @@ +/* + * 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 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); + + +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; + 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; + + /* 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 */ +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; +} |