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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>
29#include <asm/system.h>
30#include <asm/pgtable.h>
31#include <asm/setup.h>
32#include <asm/irq.h>
33#include <asm/traps.h>
34#include <asm/rtc.h>
35#include <asm/machdep.h>
36#include <asm/mvme147hw.h>
37
38
Linus Torvalds1da177e2005-04-16 15:20:36 -070039static void mvme147_get_model(char *model);
40static int mvme147_get_hardware_list(char *buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041extern void mvme147_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
42extern unsigned long mvme147_gettimeoffset (void);
43extern int mvme147_hwclk (int, struct rtc_time *);
44extern int mvme147_set_clock_mmss (unsigned long);
45extern void mvme147_reset (void);
46extern void mvme147_waitbut(void);
47
48
49static int bcd2int (unsigned char b);
50
51/* Save tick handler routine pointer, will point to do_timer() in
52 * kernel/sched.c, called via mvme147_process_int() */
53
54irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);
55
56
57int mvme147_parse_bootinfo(const struct bi_record *bi)
58{
59 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
60 return 0;
61 else
62 return 1;
63}
64
65void mvme147_reset(void)
66{
67 printk ("\r\n\nCalled mvme147_reset\r\n");
68 m147_pcc->watchdog = 0x0a; /* Clear timer */
69 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
70 while (1)
71 ;
72}
73
74static void mvme147_get_model(char *model)
75{
76 sprintf(model, "Motorola MVME147");
77}
78
79
80static int mvme147_get_hardware_list(char *buffer)
81{
82 *buffer = '\0';
83
84 return 0;
85}
86
Roman Zippel200a3d32006-06-25 05:47:06 -070087/*
88 * This function is called during kernel startup to initialize
89 * the mvme147 IRQ handling routines.
90 */
91
92void mvme147_init_IRQ(void)
93{
94 m68k_setup_user_interrupt(VEC_USER, 192, NULL);
95}
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97void __init config_mvme147(void)
98{
99 mach_max_dma_address = 0x01000000;
100 mach_sched_init = mvme147_sched_init;
101 mach_init_IRQ = mvme147_init_IRQ;
102 mach_gettimeoffset = mvme147_gettimeoffset;
103 mach_hwclk = mvme147_hwclk;
104 mach_set_clock_mmss = mvme147_set_clock_mmss;
105 mach_reset = mvme147_reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 mach_get_model = mvme147_get_model;
107 mach_get_hardware_list = mvme147_get_hardware_list;
108
109 /* Board type is only set by newer versions of vmelilo/tftplilo */
110 if (!vme_brdtype)
111 vme_brdtype = VME_TYPE_MVME147;
112}
113
114
115/* Using pcc tick timer 1 */
116
117static irqreturn_t mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp)
118{
119 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
120 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
121 return tick_handler(irq, dev_id, fp);
122}
123
124
125void mvme147_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
126{
127 tick_handler = timer_routine;
128 request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
129 IRQ_FLG_REPLACE, "timer 1", NULL);
130
131 /* Init the clock with a value */
132 /* our clock goes off every 6.25us */
133 m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
134 m147_pcc->t1_cntrl = 0x0; /* clear timer */
135 m147_pcc->t1_cntrl = 0x3; /* start timer */
136 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
137 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
138}
139
140/* This is always executed with interrupts disabled. */
141/* XXX There are race hazards in this code XXX */
142unsigned long mvme147_gettimeoffset (void)
143{
144 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
145 unsigned short n;
146
147 n = *cp;
148 while (n != *cp)
149 n = *cp;
150
151 n -= PCC_TIMER_PRELOAD;
152 return (unsigned long)n * 25 / 4;
153}
154
155static int bcd2int (unsigned char b)
156{
157 return ((b>>4)*10 + (b&15));
158}
159
160int mvme147_hwclk(int op, struct rtc_time *t)
161{
162#warning check me!
163 if (!op) {
164 m147_rtc->ctrl = RTC_READ;
165 t->tm_year = bcd2int (m147_rtc->bcd_year);
166 t->tm_mon = bcd2int (m147_rtc->bcd_mth);
167 t->tm_mday = bcd2int (m147_rtc->bcd_dom);
168 t->tm_hour = bcd2int (m147_rtc->bcd_hr);
169 t->tm_min = bcd2int (m147_rtc->bcd_min);
170 t->tm_sec = bcd2int (m147_rtc->bcd_sec);
171 m147_rtc->ctrl = 0;
172 }
173 return 0;
174}
175
176int mvme147_set_clock_mmss (unsigned long nowtime)
177{
178 return 0;
179}
180
181/*------------------- Serial console stuff ------------------------*/
182
183static void scc_delay (void)
184{
185 int n;
186 volatile int trash;
187
188 for (n = 0; n < 20; n++)
189 trash = n;
190}
191
192static void scc_write (char ch)
193{
194 volatile char *p = (volatile char *)M147_SCC_A_ADDR;
195
196 do {
197 scc_delay();
198 }
199 while (!(*p & 4));
200 scc_delay();
201 *p = 8;
202 scc_delay();
203 *p = ch;
204}
205
206
207void m147_scc_write (struct console *co, const char *str, unsigned count)
208{
209 unsigned long flags;
210
211 local_irq_save(flags);
212
213 while (count--)
214 {
215 if (*str == '\n')
216 scc_write ('\r');
217 scc_write (*str++);
218 }
219 local_irq_restore(flags);
220}
221
222void mvme147_init_console_port (struct console *co, int cflag)
223{
224 co->write = m147_scc_write;
225}