x86/xen: resume timer irqs early
[linux/fpc-iii.git] / arch / m68k / mvme147 / config.c
blob1c6262803b9455d46fbde9b05587fc910b1687f5
1 /*
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]
7 * Based on:
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
13 * for more details.
16 #include <linux/types.h>
17 #include <linux/kernel.h>
18 #include <linux/mm.h>
19 #include <linux/tty.h>
20 #include <linux/console.h>
21 #include <linux/linkage.h>
22 #include <linux/init.h>
23 #include <linux/major.h>
24 #include <linux/genhd.h>
25 #include <linux/rtc.h>
26 #include <linux/interrupt.h>
28 #include <asm/bootinfo.h>
29 #include <asm/pgtable.h>
30 #include <asm/setup.h>
31 #include <asm/irq.h>
32 #include <asm/traps.h>
33 #include <asm/rtc.h>
34 #include <asm/machdep.h>
35 #include <asm/mvme147hw.h>
38 static void mvme147_get_model(char *model);
39 extern void mvme147_sched_init(irq_handler_t handler);
40 extern u32 mvme147_gettimeoffset(void);
41 extern int mvme147_hwclk (int, struct rtc_time *);
42 extern int mvme147_set_clock_mmss (unsigned long);
43 extern void mvme147_reset (void);
46 static int bcd2int (unsigned char b);
48 /* Save tick handler routine pointer, will point to xtime_update() in
49 * kernel/time/timekeeping.c, called via mvme147_process_int() */
51 irq_handler_t tick_handler;
54 int mvme147_parse_bootinfo(const struct bi_record *bi)
56 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
57 return 0;
58 else
59 return 1;
62 void mvme147_reset(void)
64 printk ("\r\n\nCalled mvme147_reset\r\n");
65 m147_pcc->watchdog = 0x0a; /* Clear timer */
66 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
67 while (1)
71 static void mvme147_get_model(char *model)
73 sprintf(model, "Motorola MVME147");
77 * This function is called during kernel startup to initialize
78 * the mvme147 IRQ handling routines.
81 void __init mvme147_init_IRQ(void)
83 m68k_setup_user_interrupt(VEC_USER, 192);
86 void __init config_mvme147(void)
88 mach_max_dma_address = 0x01000000;
89 mach_sched_init = mvme147_sched_init;
90 mach_init_IRQ = mvme147_init_IRQ;
91 arch_gettimeoffset = mvme147_gettimeoffset;
92 mach_hwclk = mvme147_hwclk;
93 mach_set_clock_mmss = mvme147_set_clock_mmss;
94 mach_reset = mvme147_reset;
95 mach_get_model = mvme147_get_model;
97 /* Board type is only set by newer versions of vmelilo/tftplilo */
98 if (!vme_brdtype)
99 vme_brdtype = VME_TYPE_MVME147;
103 /* Using pcc tick timer 1 */
105 static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
107 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
108 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
109 return tick_handler(irq, dev_id);
113 void mvme147_sched_init (irq_handler_t timer_routine)
115 tick_handler = timer_routine;
116 if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1", NULL))
117 pr_err("Couldn't register timer interrupt\n");
119 /* Init the clock with a value */
120 /* our clock goes off every 6.25us */
121 m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
122 m147_pcc->t1_cntrl = 0x0; /* clear timer */
123 m147_pcc->t1_cntrl = 0x3; /* start timer */
124 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
125 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
128 /* This is always executed with interrupts disabled. */
129 /* XXX There are race hazards in this code XXX */
130 u32 mvme147_gettimeoffset(void)
132 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
133 unsigned short n;
135 n = *cp;
136 while (n != *cp)
137 n = *cp;
139 n -= PCC_TIMER_PRELOAD;
140 return ((unsigned long)n * 25 / 4) * 1000;
143 static int bcd2int (unsigned char b)
145 return ((b>>4)*10 + (b&15));
148 int mvme147_hwclk(int op, struct rtc_time *t)
150 #warning check me!
151 if (!op) {
152 m147_rtc->ctrl = RTC_READ;
153 t->tm_year = bcd2int (m147_rtc->bcd_year);
154 t->tm_mon = bcd2int (m147_rtc->bcd_mth);
155 t->tm_mday = bcd2int (m147_rtc->bcd_dom);
156 t->tm_hour = bcd2int (m147_rtc->bcd_hr);
157 t->tm_min = bcd2int (m147_rtc->bcd_min);
158 t->tm_sec = bcd2int (m147_rtc->bcd_sec);
159 m147_rtc->ctrl = 0;
161 return 0;
164 int mvme147_set_clock_mmss (unsigned long nowtime)
166 return 0;
169 /*------------------- Serial console stuff ------------------------*/
171 static void scc_delay (void)
173 int n;
174 volatile int trash;
176 for (n = 0; n < 20; n++)
177 trash = n;
180 static void scc_write (char ch)
182 volatile char *p = (volatile char *)M147_SCC_A_ADDR;
184 do {
185 scc_delay();
187 while (!(*p & 4));
188 scc_delay();
189 *p = 8;
190 scc_delay();
191 *p = ch;
195 void m147_scc_write (struct console *co, const char *str, unsigned count)
197 unsigned long flags;
199 local_irq_save(flags);
201 while (count--)
203 if (*str == '\n')
204 scc_write ('\r');
205 scc_write (*str++);
207 local_irq_restore(flags);
210 void mvme147_init_console_port (struct console *co, int cflag)
212 co->write = m147_scc_write;