2 * arch/m68k/mvme147/config.c
4 * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
5 * Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
9 * Copyright (C) 1993 Hamish Macdonald
11 * This file is subject to the terms and conditions of the GNU General Public
12 * License. See the file README.legal in the main directory of this archive
16 #include <linux/types.h>
17 #include <linux/kernel.h>
19 #include <linux/tty.h>
20 #include <linux/clocksource.h>
21 #include <linux/console.h>
22 #include <linux/linkage.h>
23 #include <linux/init.h>
24 #include <linux/major.h>
25 #include <linux/genhd.h>
26 #include <linux/rtc.h>
27 #include <linux/interrupt.h>
29 #include <asm/bootinfo.h>
30 #include <asm/bootinfo-vme.h>
31 #include <asm/byteorder.h>
32 #include <asm/pgtable.h>
33 #include <asm/setup.h>
35 #include <asm/traps.h>
36 #include <asm/machdep.h>
37 #include <asm/mvme147hw.h>
40 static void mvme147_get_model(char *model);
41 extern void mvme147_sched_init(irq_handler_t handler);
42 extern int mvme147_hwclk (int, struct rtc_time *);
43 extern void mvme147_reset (void);
46 static int bcd2int (unsigned char b);
49 int __init mvme147_parse_bootinfo(const struct bi_record *bi)
51 uint16_t tag = be16_to_cpu(bi->tag);
52 if (tag == BI_VME_TYPE || tag == BI_VME_BRDINFO)
58 void mvme147_reset(void)
60 pr_info("\r\n\nCalled mvme147_reset\r\n");
61 m147_pcc->watchdog = 0x0a; /* Clear timer */
62 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
67 static void mvme147_get_model(char *model)
69 sprintf(model, "Motorola MVME147");
73 * This function is called during kernel startup to initialize
74 * the mvme147 IRQ handling routines.
77 void __init mvme147_init_IRQ(void)
79 m68k_setup_user_interrupt(VEC_USER, 192);
82 void __init config_mvme147(void)
84 mach_max_dma_address = 0x01000000;
85 mach_sched_init = mvme147_sched_init;
86 mach_init_IRQ = mvme147_init_IRQ;
87 mach_hwclk = mvme147_hwclk;
88 mach_reset = mvme147_reset;
89 mach_get_model = mvme147_get_model;
91 /* Board type is only set by newer versions of vmelilo/tftplilo */
93 vme_brdtype = VME_TYPE_MVME147;
96 static u64 mvme147_read_clk(struct clocksource *cs);
98 static struct clocksource mvme147_clk = {
101 .read = mvme147_read_clk,
102 .mask = CLOCKSOURCE_MASK(32),
103 .flags = CLOCK_SOURCE_IS_CONTINUOUS,
106 static u32 clk_total;
108 #define PCC_TIMER_CLOCK_FREQ 160000
109 #define PCC_TIMER_CYCLES (PCC_TIMER_CLOCK_FREQ / HZ)
110 #define PCC_TIMER_PRELOAD (0x10000 - PCC_TIMER_CYCLES)
112 /* Using pcc tick timer 1 */
114 static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
116 irq_handler_t timer_routine = dev_id;
119 local_irq_save(flags);
120 m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
122 m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
124 clk_total += PCC_TIMER_CYCLES;
125 timer_routine(0, NULL);
126 local_irq_restore(flags);
132 void mvme147_sched_init (irq_handler_t timer_routine)
134 if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, IRQF_TIMER,
135 "timer 1", timer_routine))
136 pr_err("Couldn't register timer interrupt\n");
138 /* Init the clock with a value */
139 /* The clock counter increments until 0xFFFF then reloads */
140 m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
141 m147_pcc->t1_cntrl = PCC_TIMER_CLR_OVF | PCC_TIMER_COC_EN |
143 m147_pcc->t1_int_cntrl = PCC_INT_ENAB | PCC_TIMER_INT_CLR |
146 clocksource_register_hz(&mvme147_clk, PCC_TIMER_CLOCK_FREQ);
149 static u64 mvme147_read_clk(struct clocksource *cs)
156 local_irq_save(flags);
157 tmp = m147_pcc->t1_cntrl >> 4;
158 count = m147_pcc->t1_count;
159 overflow = m147_pcc->t1_cntrl >> 4;
161 count = m147_pcc->t1_count;
162 count -= PCC_TIMER_PRELOAD;
163 ticks = count + overflow * PCC_TIMER_CYCLES;
165 local_irq_restore(flags);
170 static int bcd2int (unsigned char b)
172 return ((b>>4)*10 + (b&15));
175 int mvme147_hwclk(int op, struct rtc_time *t)
179 m147_rtc->ctrl = RTC_READ;
180 t->tm_year = bcd2int (m147_rtc->bcd_year);
181 t->tm_mon = bcd2int(m147_rtc->bcd_mth) - 1;
182 t->tm_mday = bcd2int (m147_rtc->bcd_dom);
183 t->tm_hour = bcd2int (m147_rtc->bcd_hr);
184 t->tm_min = bcd2int (m147_rtc->bcd_min);
185 t->tm_sec = bcd2int (m147_rtc->bcd_sec);