File: /usr/src/linux/arch/m68k/mvme147/config.c
1 /*
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
25 #include <asm/bootinfo.h>
26 #include <asm/system.h>
27 #include <asm/pgtable.h>
28 #include <asm/setup.h>
29 #include <asm/irq.h>
30 #include <asm/traps.h>
31 #include <asm/rtc.h>
32 #include <asm/machdep.h>
33 #include <asm/mvme147hw.h>
34
35
36 extern void mvme147_process_int (int level, struct pt_regs *regs);
37 extern void mvme147_init_IRQ (void);
38 extern void mvme147_free_irq (unsigned int, void *);
39 extern int mvme147_get_irq_list (char *);
40 extern void mvme147_enable_irq (unsigned int);
41 extern void mvme147_disable_irq (unsigned int);
42 static void mvme147_get_model(char *model);
43 static int mvme147_get_hardware_list(char *buffer);
44 extern int mvme147_request_irq (unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id);
45 extern void mvme147_sched_init(void (*handler)(int, void *, struct pt_regs *));
46 extern int mvme147_keyb_init(void);
47 extern int mvme147_kbdrate (struct kbd_repeat *);
48 extern unsigned long mvme147_gettimeoffset (void);
49 extern void mvme147_gettod (int *year, int *mon, int *day, int *hour,
50 int *min, int *sec);
51 extern int mvme147_hwclk (int, struct hwclk_time *);
52 extern int mvme147_set_clock_mmss (unsigned long);
53 extern void mvme147_check_partition (struct gendisk *hd, unsigned int dev);
54 extern void mvme147_reset (void);
55 extern void mvme147_waitbut(void);
56
57
58 static int bcd2int (unsigned char b);
59
60 /* Save tick handler routine pointer, will point to do_timer() in
61 * kernel/sched.c, called via mvme147_process_int() */
62
63 void (*tick_handler)(int, void *, struct pt_regs *);
64
65
66 int mvme147_parse_bootinfo(const struct bi_record *bi)
67 {
68 if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
69 return 0;
70 else
71 return 1;
72 }
73
74 int mvme147_kbdrate (struct kbd_repeat *k)
75 {
76 return 0;
77 }
78
79 void mvme147_reset()
80 {
81 printk ("\r\n\nCalled mvme147_reset\r\n");
82 m147_pcc->watchdog = 0x0a; /* Clear timer */
83 m147_pcc->watchdog = 0xa5; /* Enable watchdog - 100ms to reset */
84 while (1)
85 ;
86 }
87
88 static void mvme147_get_model(char *model)
89 {
90 sprintf(model, "Motorola MVME147");
91 }
92
93
94 static int mvme147_get_hardware_list(char *buffer)
95 {
96 *buffer = '\0';
97
98 return 0;
99 }
100
101
102 void __init config_mvme147(void)
103 {
104 mach_max_dma_address = 0x01000000;
105 mach_sched_init = mvme147_sched_init;
106 mach_keyb_init = mvme147_keyb_init;
107 mach_kbdrate = mvme147_kbdrate;
108 mach_init_IRQ = mvme147_init_IRQ;
109 mach_gettimeoffset = mvme147_gettimeoffset;
110 mach_gettod = mvme147_gettod;
111 mach_hwclk = mvme147_hwclk;
112 mach_set_clock_mmss = mvme147_set_clock_mmss;
113 mach_reset = mvme147_reset;
114 mach_free_irq = mvme147_free_irq;
115 mach_process_int = mvme147_process_int;
116 mach_get_irq_list = mvme147_get_irq_list;
117 mach_request_irq = mvme147_request_irq;
118 enable_irq = mvme147_enable_irq;
119 disable_irq = mvme147_disable_irq;
120 mach_get_model = mvme147_get_model;
121 mach_get_hardware_list = mvme147_get_hardware_list;
122
123 /* Board type is only set by newer versions of vmelilo/tftplilo */
124 if (!vme_brdtype)
125 vme_brdtype = VME_TYPE_MVME147;
126 }
127
128
129 /* Using pcc tick timer 1 */
130
131 static void mvme147_timer_int (int irq, void *dev_id, struct pt_regs *fp)
132 {
133 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR;
134 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
135 tick_handler(irq, dev_id, fp);
136 }
137
138
139 void mvme147_sched_init (void (*timer_routine)(int, void *, struct pt_regs *))
140 {
141 tick_handler = timer_routine;
142 request_irq (PCC_IRQ_TIMER1, mvme147_timer_int,
143 IRQ_FLG_REPLACE, "timer 1", NULL);
144
145 /* Init the clock with a value */
146 /* our clock goes off every 6.25us */
147 m147_pcc->t1_preload = PCC_TIMER_PRELOAD;
148 m147_pcc->t1_cntrl = 0x0; /* clear timer */
149 m147_pcc->t1_cntrl = 0x3; /* start timer */
150 m147_pcc->t1_int_cntrl = PCC_TIMER_INT_CLR; /* clear pending ints */
151 m147_pcc->t1_int_cntrl = PCC_INT_ENAB|PCC_LEVEL_TIMER1;
152 }
153
154 /* This is always executed with interrupts disabled. */
155 /* XXX There are race hazards in this code XXX */
156 unsigned long mvme147_gettimeoffset (void)
157 {
158 volatile unsigned short *cp = (volatile unsigned short *)0xfffe1012;
159 unsigned short n;
160
161 n = *cp;
162 while (n != *cp)
163 n = *cp;
164
165 n -= PCC_TIMER_PRELOAD;
166 return (unsigned long)n * 25 / 4;
167 }
168
169 extern void mvme147_gettod (int *year, int *mon, int *day, int *hour,
170 int *min, int *sec)
171 {
172 m147_rtc->ctrl = RTC_READ;
173 *year = bcd2int (m147_rtc->bcd_year);
174 *mon = bcd2int (m147_rtc->bcd_mth);
175 *day = bcd2int (m147_rtc->bcd_dom);
176 *hour = bcd2int (m147_rtc->bcd_hr);
177 *min = bcd2int (m147_rtc->bcd_min);
178 *sec = bcd2int (m147_rtc->bcd_sec);
179 m147_rtc->ctrl = 0;
180 }
181
182 static int bcd2int (unsigned char b)
183 {
184 return ((b>>4)*10 + (b&15));
185 }
186
187 int mvme147_hwclk(int op, struct hwclk_time *t)
188 {
189 return 0;
190 }
191
192 int mvme147_set_clock_mmss (unsigned long nowtime)
193 {
194 return 0;
195 }
196
197 int mvme147_keyb_init (void)
198 {
199 return 0;
200 }
201
202 /*------------------- Serial console stuff ------------------------*/
203
204 static void scc_delay (void)
205 {
206 int n;
207 volatile int trash;
208
209 for (n = 0; n < 20; n++)
210 trash = n;
211 }
212
213 static void scc_write (char ch)
214 {
215 volatile char *p = (volatile char *)M147_SCC_A_ADDR;
216
217 do {
218 scc_delay();
219 }
220 while (!(*p & 4));
221 scc_delay();
222 *p = 8;
223 scc_delay();
224 *p = ch;
225 }
226
227
228 void m147_scc_write (struct console *co, const char *str, unsigned count)
229 {
230 unsigned long flags;
231
232 save_flags(flags);
233 cli();
234
235 while (count--)
236 {
237 if (*str == '\n')
238 scc_write ('\r');
239 scc_write (*str++);
240 }
241 restore_flags(flags);
242 }
243
244
245 static int m147_scc_wait_key (struct console *co)
246 {
247 volatile unsigned char *p = (volatile char *)M147_SCC_A_ADDR;
248 unsigned long flags;
249 int c;
250
251 /* wait for rx buf filled */
252 while ((*p & 0x01) == 0)
253 ;
254
255 save_flags(flags);
256 cli();
257
258 *p = 8;
259 scc_delay();
260 c = *p;
261
262 restore_flags(flags);
263 return c;
264 }
265
266
267 void mvme147_init_console_port (struct console *co, int cflag)
268 {
269 co->write = m147_scc_write;
270 co->wait_key = m147_scc_wait_key;
271 }
272