aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/mvme16x/config.c
blob: ce2727ed1bc05d64c37059fd67e49873aa534143 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
/*
 *  arch/m68k/mvme16x/config.c
 *
 *  Copyright (C) 1995 Richard Hirst [richard@sleepie.demon.co.uk]
 *
 * Based on:
 *
 *  linux/amiga/config.c
 *
 *  Copyright (C) 1993 Hamish Macdonald
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file README.legal in the main directory of this archive
 * for more details.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/linkage.h>
#include <linux/init.h>
#include <linux/major.h>
#include <linux/genhd.h>
#include <linux/rtc.h>
#include <linux/interrupt.h>

#include <asm/bootinfo.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/rtc.h>
#include <asm/machdep.h>
#include <asm/mvme16xhw.h>

extern t_bdid mvme_bdid;

static MK48T08ptr_t volatile rtc = (MK48T08ptr_t)MVME_RTC_BASE;

static void mvme16x_get_model(char *model);
static int  mvme16x_get_hardware_list(char *buffer);
extern void mvme16x_sched_init(irqreturn_t (*handler)(int, void *, struct pt_regs *));
extern unsigned long mvme16x_gettimeoffset (void);
extern int mvme16x_hwclk (int, struct rtc_time *);
extern int mvme16x_set_clock_mmss (unsigned long);
extern void mvme16x_reset (void);
extern void mvme16x_waitbut(void);

int bcd2int (unsigned char b);

/* Save tick handler routine pointer, will point to do_timer() in
 * kernel/sched.c, called via mvme16x_process_int() */

static irqreturn_t (*tick_handler)(int, void *, struct pt_regs *);


unsigned short mvme16x_config;


int mvme16x_parse_bootinfo(const struct bi_record *bi)
{
	if (bi->tag == BI_VME_TYPE || bi->tag == BI_VME_BRDINFO)
		return 0;
	else
		return 1;
}

void mvme16x_reset(void)
{
	printk ("\r\n\nCalled mvme16x_reset\r\n"
			"\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r");
	/* The string of returns is to delay the reset until the whole
	 * message is output.  Assert reset bit in GCSR */
	*(volatile char *)0xfff40107 = 0x80;
}

static void mvme16x_get_model(char *model)
{
    p_bdid p = &mvme_bdid;
    char suf[4];

    suf[1] = p->brdsuffix[0];
    suf[2] = p->brdsuffix[1];
    suf[3] = '\0';
    suf[0] = suf[1] ? '-' : '\0';

    sprintf(model, "Motorola MVME%x%s", p->brdno, suf);
}


static int mvme16x_get_hardware_list(char *buffer)
{
    p_bdid p = &mvme_bdid;
    int len = 0;

    if (p->brdno == 0x0162 || p->brdno == 0x0172)
    {
	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;

	len += sprintf (buffer+len, "VMEchip2        %spresent\n",
			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
	len += sprintf (buffer+len, "SCSI interface  %spresent\n",
			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
	len += sprintf (buffer+len, "Ethernet i/f    %spresent\n",
			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
    }
    else
	*buffer = '\0';

    return (len);
}

/*
 * This function is called during kernel startup to initialize
 * the mvme16x IRQ handling routines.  Should probably ensure
 * that the base vectors for the VMEChip2 and PCCChip2 are valid.
 */

static void mvme16x_init_IRQ (void)
{
	m68k_setup_user_interrupt(VEC_USER, 192, NULL);
}

#define pcc2chip	((volatile u_char *)0xfff42000)
#define PccSCCMICR	0x1d
#define PccSCCTICR	0x1e
#define PccSCCRICR	0x1f

void __init config_mvme16x(void)
{
    p_bdid p = &mvme_bdid;
    char id[40];

    mach_max_dma_address = 0xffffffff;
    mach_sched_init      = mvme16x_sched_init;
    mach_init_IRQ        = mvme16x_init_IRQ;
    mach_gettimeoffset   = mvme16x_gettimeoffset;
    mach_hwclk           = mvme16x_hwclk;
    mach_set_clock_mmss	 = mvme16x_set_clock_mmss;
    mach_reset		 = mvme16x_reset;
    mach_get_model       = mvme16x_get_model;
    mach_get_hardware_list = mvme16x_get_hardware_list;

    /* Report board revision */

    if (strncmp("BDID", p->bdid, 4))
    {
	printk ("\n\nBug call .BRD_ID returned garbage - giving up\n\n");
	while (1)
		;
    }
    /* Board type is only set by newer versions of vmelilo/tftplilo */
    if (vme_brdtype == 0)
	vme_brdtype = p->brdno;

    mvme16x_get_model(id);
    printk ("\nBRD_ID: %s   BUG %x.%x %02x/%02x/%02x\n", id, p->rev>>4,
					p->rev&0xf, p->yr, p->mth, p->day);
    if (p->brdno == 0x0162 || p->brdno == 0x172)
    {
	unsigned char rev = *(unsigned char *)MVME162_VERSION_REG;

	mvme16x_config = rev | MVME16x_CONFIG_GOT_SCCA;

	printk ("MVME%x Hardware status:\n", p->brdno);
	printk ("    CPU Type           68%s040\n",
			rev & MVME16x_CONFIG_GOT_FPU ? "" : "LC");
	printk ("    CPU clock          %dMHz\n",
			rev & MVME16x_CONFIG_SPEED_32 ? 32 : 25);
	printk ("    VMEchip2           %spresent\n",
			rev & MVME16x_CONFIG_NO_VMECHIP2 ? "NOT " : "");
	printk ("    SCSI interface     %spresent\n",
			rev & MVME16x_CONFIG_NO_SCSICHIP ? "NOT " : "");
	printk ("    Ethernet interface %spresent\n",
			rev & MVME16x_CONFIG_NO_ETHERNET ? "NOT " : "");
    }
    else
    {
	mvme16x_config = MVME16x_CONFIG_GOT_LP | MVME16x_CONFIG_GOT_CD2401;

	/* Dont allow any interrupts from the CD2401 until the interrupt */
	/* handlers are installed					 */

	pcc2chip[PccSCCMICR] = 0x10;
	pcc2chip[PccSCCTICR] = 0x10;
	pcc2chip[PccSCCRICR] = 0x10;
    }
}

static irqreturn_t mvme16x_abort_int (int irq, void *dev_id, struct pt_regs *fp)
{
	p_bdid p = &mvme_bdid;
	unsigned long *new = (unsigned long *)vectors;
	unsigned long *old = (unsigned long *)0xffe00000;
	volatile unsigned char uc, *ucp;

	if (p->brdno == 0x0162 || p->brdno == 0x172)
	{
		ucp = (volatile unsigned char *)0xfff42043;
		uc = *ucp | 8;
		*ucp = uc;
	}
	else
	{
		*(volatile unsigned long *)0xfff40074 = 0x40000000;
	}
	*(new+4) = *(old+4);		/* Illegal instruction */
	*(new+9) = *(old+9);		/* Trace */
	*(new+47) = *(old+47);		/* Trap #15 */

	if (p->brdno == 0x0162 || p->brdno == 0x172)
		*(new+0x5e) = *(old+0x5e);	/* ABORT switch */
	else
		*(new+0x6e) = *(old+0x6e);	/* ABORT switch */
	return IRQ_HANDLED;
}

static irqreturn_t mvme16x_timer_int (int irq, void *dev_id, struct pt_regs *fp)
{
    *(volatile unsigned char *)0xfff4201b |= 8;
    return tick_handler(irq, dev_id, fp);
}

void mvme16x_sched_init (irqreturn_t (*timer_routine)(int, void *, struct pt_regs *))
{
    p_bdid p = &mvme_bdid;
    int irq;

    tick_handler = timer_routine;
    /* Using PCCchip2 or MC2 chip tick timer 1 */
    *(volatile unsigned long *)0xfff42008 = 0;
    *(volatile unsigned long *)0xfff42004 = 10000;	/* 10ms */
    *(volatile unsigned char *)0xfff42017 |= 3;
    *(volatile unsigned char *)0xfff4201b = 0x16;
    if (request_irq(MVME16x_IRQ_TIMER, mvme16x_timer_int, 0,
				"timer", mvme16x_timer_int))
	panic ("Couldn't register timer int");

    if (p->brdno == 0x0162 || p->brdno == 0x172)
	irq = MVME162_IRQ_ABORT;
    else
        irq = MVME167_IRQ_ABORT;
    if (request_irq(irq, mvme16x_abort_int, 0,
				"abort", mvme16x_abort_int))
	panic ("Couldn't register abort int");
}


/* This is always executed with interrupts disabled.  */
unsigned long mvme16x_gettimeoffset (void)
{
    return (*(volatile unsigned long *)0xfff42008);
}

int bcd2int (unsigned char b)
{
	return ((b>>4)*10 + (b&15));
}

int mvme16x_hwclk(int op, struct rtc_time *t)
{
#warning check me!
	if (!op) {
		rtc->ctrl = RTC_READ;
		t->tm_year = bcd2int (rtc->bcd_year);
		t->tm_mon  = bcd2int (rtc->bcd_mth);
		t->tm_mday = bcd2int (rtc->bcd_dom);
		t->tm_hour = bcd2int (rtc->bcd_hr);
		t->tm_min  = bcd2int (rtc->bcd_min);
		t->tm_sec  = bcd2int (rtc->bcd_sec);
		rtc->ctrl = 0;
	}
	return 0;
}

int mvme16x_set_clock_mmss (unsigned long nowtime)
{
	return 0;
}