diff options
Diffstat (limited to 'arch/m68k/mvme147')
| -rw-r--r-- | arch/m68k/mvme147/Makefile | 6 | ||||
| -rw-r--r-- | arch/m68k/mvme147/config.c | 190 |
2 files changed, 196 insertions, 0 deletions
diff --git a/arch/m68k/mvme147/Makefile b/arch/m68k/mvme147/Makefile new file mode 100644 index 000000000..d78f6f9fa --- /dev/null +++ b/arch/m68k/mvme147/Makefile @@ -0,0 +1,6 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# 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 000000000..aab7880e0 --- /dev/null +++ b/arch/m68k/mvme147/config.c @@ -0,0 +1,190 @@ +/* + * 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/clocksource.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/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> + + +static void mvme147_get_model(char *model); +extern void mvme147_sched_init(irq_handler_t handler); +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_max_dma_address = 0x01000000; + 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) +{ + irq_handler_t timer_routine = 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; + timer_routine(0, NULL); + local_irq_restore(flags); + + return IRQ_HANDLED; +} + + +void mvme147_sched_init (irq_handler_t timer_routine) +{ + if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER, + "timer 1", timer_routine)) + 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) +{ +#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) - 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; + } + return 0; +} |