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- /*
- * arch/m68k/mvme147/config.c
- *
- * Copyright (C) 1996 Dave Frascone [[email protected]]
- * Cloned from Richard Hirst [[email protected]]
- *
- * 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/clocksource.h>
- #include <linux/console.h>
- #include <linux/linkage.h>
- #include <linux/init.h>
- #include <linux/major.h>
- #include <linux/rtc.h>
- #include <linux/interrupt.h>
- #include <asm/bootinfo.h>
- #include <asm/bootinfo-vme.h>
- #include <asm/byteorder.h>
- #include <asm/setup.h>
- #include <asm/irq.h>
- #include <asm/traps.h>
- #include <asm/machdep.h>
- #include <asm/mvme147hw.h>
- #include <asm/config.h>
- static void mvme147_get_model(char *model);
- extern void mvme147_sched_init(void);
- extern int mvme147_hwclk (int, struct rtc_time *);
- extern void mvme147_reset (void);
- static int bcd2int (unsigned char b);
- int __init mvme147_parse_bootinfo(const struct bi_record *bi)
- {
- uint16_t tag = be16_to_cpu(bi->tag);
- if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
- return 0;
- else
- return 1;
- }
- void mvme147_reset(void)
- {
- pr_info("\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_sched_init = mvme147_sched_init;
- mach_init_IRQ = mvme147_init_IRQ;
- mach_hwclk = mvme147_hwclk;
- 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;
- }
- static u64 mvme147_read_clk(struct clocksource *cs);
- static struct clocksource mvme147_clk = {
- .name = "pcc",
- .rating = 250,
- .read = mvme147_read_clk,
- .mask = CLOCKSOURCE_MASK(32),
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
- };
- static u32 clk_total;
- #define PCC_TIMER_CLOCK_FREQ 160000
- #define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
- #define PCC_TIMER_PRELOAD (0x10000 - PCC_TIMER_CYCLES)
- /* Using pcc tick timer 1 */
- static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
- {
- unsigned long flags;
- local_irq_save(flags);
- m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
- PCC_TIMER_TIC_EN;
- m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
- PCC_LEVEL_TIMER1;
- clk_total += PCC_TIMER_CYCLES;
- legacy_timer_tick(1);
- local_irq_restore(flags);
- return IRQ_HANDLED;
- }
- void mvme147_sched_init (void)
- {
- if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER,
- "timer 1", NULL))
- pr_err("Couldn't register timer interrupt\n");
- /* Init the clock with a value */
- /* The clock counter increments until 0xFFFF then reloads */
- m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
- m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
- PCC_TIMER_TIC_EN;
- m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
- PCC_LEVEL_TIMER1;
- clocksource_register_hz(&mvme147_clk, PCC_TIMER_CLOCK_FREQ);
- }
- static u64 mvme147_read_clk(struct clocksource *cs)
- {
- unsigned long flags;
- u8 overflow, tmp;
- u16 count;
- u32 ticks;
- local_irq_save(flags);
- tmp = m147_pcc->t1_cntrl >> 4;
- count = m147_pcc->t1_count;
- overflow = m147_pcc->t1_cntrl >> 4;
- if (overflow != tmp)
- count = m147_pcc->t1_count;
- count -= PCC_TIMER_PRELOAD;
- ticks = count + overflow * PCC_TIMER_CYCLES;
- ticks += clk_total;
- local_irq_restore(flags);
- return ticks;
- }
- static int bcd2int (unsigned char b)
- {
- return ((b>>4)*10 + (b&15));
- }
- int mvme147_hwclk(int op, struct rtc_time *t)
- {
- if (!op) {
- m147_rtc->ctrl = RTC_READ;
- t->tm_year = bcd2int (m147_rtc->bcd_year);
- t->tm_mon = bcd2int(m147_rtc->bcd_mth) - 1;
- 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;
- if (t->tm_year < 70)
- t->tm_year += 100;
- } else {
- /* FIXME Setting the time is not yet supported */
- return -EOPNOTSUPP;
- }
- return 0;
- }
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