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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * arch/m68k/mvme147/config.c
3 *
4 * Copyright (C) 1996 Dave Frascone [chaos@mindspring.com]
5 * Cloned from Richard Hirst [richard@sleepie.demon.co.uk]
6 *
7 * Based on:
8 *
9 * Copyright (C) 1993 Hamish Macdonald
10 *
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.
14 */
15
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>
27
28#include <asm/bootinfo.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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>
36
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038static void mvme147_get_model(char *model);
David Howells40220c12006-10-09 12:19:47 +010039extern void mvme147_sched_init(irq_handler_t handler);
Stephen Warrenc8d5ba12012-11-08 11:34:55 -070040extern u32 mvme147_gettimeoffset(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041extern int mvme147_hwclk (int, struct rtc_time *);
42extern int mvme147_set_clock_mmss (unsigned long);
43extern void mvme147_reset (void);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45
46static int bcd2int (unsigned char b);
47
Torben Hohne53f2762011-01-27 16:00:06 +010048/* Save tick handler routine pointer, will point to xtime_update() in
49 * kernel/time/timekeeping.c, called via mvme147_process_int() */
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
David Howells40220c12006-10-09 12:19:47 +010051irq_handler_t tick_handler;
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53
54int mvme147_parse_bootinfo(const struct bi_record *bi)
55{
56 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
57 return 0;
58 else
59 return 1;
60}
61
62void mvme147_reset(void)
63{
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)
68 ;
69}
70
71static void mvme147_get_model(char *model)
72{
73 sprintf(model, "Motorola MVME147");
74}
75
Roman Zippel200a3d32006-06-25 05:47:06 -070076/*
77 * This function is called during kernel startup to initialize
78 * the mvme147 IRQ handling routines.
79 */
80
Al Viro66a3f822007-07-20 04:33:28 +010081void __init mvme147_init_IRQ(void)
Roman Zippel200a3d32006-06-25 05:47:06 -070082{
Geert Uytterhoevenf30a6482011-09-11 11:54:50 +020083 m68k_setup_user_interrupt(VEC_USER, 192);
Roman Zippel200a3d32006-06-25 05:47:06 -070084}
Linus Torvalds1da177e2005-04-16 15:20:36 -070085
86void __init config_mvme147(void)
87{
88 mach_max_dma_address = 0x01000000;
89 mach_sched_init = mvme147_sched_init;
90 mach_init_IRQ = mvme147_init_IRQ;
Stephen Warrenc8d5ba12012-11-08 11:34:55 -070091 arch_gettimeoffset = mvme147_gettimeoffset;
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 mach_hwclk = mvme147_hwclk;
93 mach_set_clock_mmss = mvme147_set_clock_mmss;
94 mach_reset = mvme147_reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 mach_get_model = mvme147_get_model;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97 /* Board type is only set by newer versions of vmelilo/tftplilo */
98 if (!vme_brdtype)
99 vme_brdtype = VME_TYPE_MVME147;
100}
101
102
103/* Using pcc tick timer 1 */
104
Al Viro2850bc22006-10-07 14:16:45 +0100105static irqreturn_t mvme147_timer_int (int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106{
107 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
108 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
Al Viro2850bc22006-10-07 14:16:45 +0100109 return tick_handler(irq, dev_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110}
111
112
David Howells40220c12006-10-09 12:19:47 +0100113void mvme147_sched_init (irq_handler_t timer_routine)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114{
115 tick_handler = timer_routine;
Geert Uytterhoeven5a239452011-07-13 22:33:13 +0200116 if (request_irq(PCC_IRQ_TIMER1, mvme147_timer_int, 0, "timer 1", NULL))
Geert Uytterhoeven41904f82008-12-30 14:03:28 +0100117 pr_err("Couldn't register timer interrupt\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118
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;
126}
127
128/* This is always executed with interrupts disabled. */
129/* XXX There are race hazards in this code XXX */
Stephen Warrenc8d5ba12012-11-08 11:34:55 -0700130u32 mvme147_gettimeoffset(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
132 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
133 unsigned short n;
134
135 n = *cp;
136 while (n != *cp)
137 n = *cp;
138
139 n -= PCC_TIMER_PRELOAD;
Stephen Warrenc8d5ba12012-11-08 11:34:55 -0700140 return ((unsigned long)n * 25 / 4) * 1000;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
143static int bcd2int (unsigned char b)
144{
145 return ((b>>4)*10 + (b&15));
146}
147
148int mvme147_hwclk(int op, struct rtc_time *t)
149{
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;
160 }
161 return 0;
162}
163
164int mvme147_set_clock_mmss (unsigned long nowtime)
165{
166 return 0;
167}
168
169/*------------------- Serial console stuff ------------------------*/
170
171static void scc_delay (void)
172{
173 int n;
174 volatile int trash;
175
176 for (n = 0; n < 20; n++)
177 trash = n;
178}
179
180static void scc_write (char ch)
181{
182 volatile char *p = (volatile char *)M147_SCC_A_ADDR;
183
184 do {
185 scc_delay();
186 }
187 while (!(*p & 4));
188 scc_delay();
189 *p = 8;
190 scc_delay();
191 *p = ch;
192}
193
194
195void m147_scc_write (struct console *co, const char *str, unsigned count)
196{
197 unsigned long flags;
198
199 local_irq_save(flags);
200
201 while (count--)
202 {
203 if (*str == '\n')
204 scc_write ('\r');
205 scc_write (*str++);
206 }
207 local_irq_restore(flags);
208}
209
210void mvme147_init_console_port (struct console *co, int cflag)
211{
212 co->write = m147_scc_write;
213}