aboutsummaryrefslogtreecommitdiff
path: root/arch/m68knommu/platform/68VZ328/de2/config.c
blob: d0586197f1131deae7e72f23f67f465b17a2556a (plain)
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
/*
 *  linux/arch/m68knommu/platform/MC68VZ328/de2/config.c
 *
 *  Copyright (C) 1993 Hamish Macdonald
 *  Copyright (C) 1999 D. Jeff Dionne
 *  Copyright (C) 2001 Georges Menie, Ken Desmet
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/kd.h>
#include <linux/netdevice.h>

#include <asm/setup.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/irq.h>
#include <asm/machdep.h>
#include <asm/MC68VZ328.h>

#ifdef CONFIG_INIT_LCD
#include "screen.h"
#endif

/* with a 33.16 MHz clock, this will give usec resolution to the time functions */
#define CLOCK_SOURCE TCTL_CLKSOURCE_SYSCLK
#define CLOCK_PRE 7
#define TICKS_PER_JIFFY 41450

static void
dragen2_sched_init(irqreturn_t (*timer_routine) (int, void *, struct pt_regs *))
{
	/* disable timer 1 */
	TCTL = 0;

	/* set ISR */
	if (request_irq(TMR_IRQ_NUM, timer_routine, IRQ_FLG_LOCK, "timer", NULL)) 
		panic("Unable to attach timer interrupt\n");

	/* Restart mode, Enable int, Set clock source */
	TCTL = TCTL_OM | TCTL_IRQEN | CLOCK_SOURCE;
	TPRER = CLOCK_PRE;
	TCMP = TICKS_PER_JIFFY;

	/* Enable timer 1 */
	TCTL |= TCTL_TEN;
}

static void dragen2_tick(void)
{
	/* Reset Timer1 */
	TSTAT &= 0;
}

static unsigned long dragen2_gettimeoffset(void)
{
	unsigned long ticks = TCN, offset = 0;

	/* check for pending interrupt */
	if (ticks < (TICKS_PER_JIFFY >> 1) && (ISR & (1 << TMR_IRQ_NUM)))
		offset = 1000000 / HZ;

	ticks = (ticks * 1000000 / HZ) / TICKS_PER_JIFFY;

	return ticks + offset;
}

static void dragen2_gettod(int *year, int *mon, int *day, int *hour,
						   int *min, int *sec)
{
	long now = RTCTIME;

	*year = *mon = *day = 1;
	*hour = (now >> 24) % 24;
	*min = (now >> 16) % 60;
	*sec = now % 60;
}

static void dragen2_reset(void)
{
	local_irq_disable();

#ifdef CONFIG_INIT_LCD
	PBDATA |= 0x20;				/* disable CCFL light */
	PKDATA |= 0x4;				/* disable LCD controller */
	LCKCON = 0;
#endif

	__asm__ __volatile__(
		"reset\n\t"
		"moveal #0x04000000, %a0\n\t"
		"moveal 0(%a0), %sp\n\t"
		"moveal 4(%a0), %a0\n\t"
		"jmp (%a0)"
	);
}

static void init_hardware(void)
{
#ifdef CONFIG_DIRECT_IO_ACCESS
	SCR = 0x10;					/* allow user access to internal registers */
#endif

	/* CSGB Init */
	CSGBB = 0x4000;
	CSB = 0x1a1;

	/* CS8900 init */
	/* PK3: hardware sleep function pin, active low */
	PKSEL |= PK(3);				/* select pin as I/O */
	PKDIR |= PK(3);				/* select pin as output */
	PKDATA |= PK(3);			/* set pin high */

	/* PF5: hardware reset function pin, active high */
	PFSEL |= PF(5);				/* select pin as I/O */
	PFDIR |= PF(5);				/* select pin as output */
	PFDATA &= ~PF(5);			/* set pin low */

	/* cs8900 hardware reset */
	PFDATA |= PF(5);
	{ int i; for (i = 0; i < 32000; ++i); }
	PFDATA &= ~PF(5);

	/* INT1 enable (cs8900 IRQ) */
	PDPOL &= ~PD(1);			/* active high signal */
	PDIQEG &= ~PD(1);
	PDIRQEN |= PD(1);			/* IRQ enabled */

#ifdef CONFIG_68328_SERIAL_UART2
	/* Enable RXD TXD port bits to enable UART2 */
	PJSEL &= ~(PJ(5) | PJ(4));
#endif

#ifdef CONFIG_INIT_LCD
	/* initialize LCD controller */
	LSSA = (long) screen_bits;
	LVPW = 0x14;
	LXMAX = 0x140;
	LYMAX = 0xef;
	LRRA = 0;
	LPXCD = 3;
	LPICF = 0x08;
	LPOLCF = 0;
	LCKCON = 0x80;
	PCPDEN = 0xff;
	PCSEL = 0;

	/* Enable LCD controller */
	PKDIR |= 0x4;
	PKSEL |= 0x4;
	PKDATA &= ~0x4;

	/* Enable CCFL backlighting circuit */
	PBDIR |= 0x20;
	PBSEL |= 0x20;
	PBDATA &= ~0x20;

	/* contrast control register */
	PFDIR |= 0x1;
	PFSEL &= ~0x1;
	PWMR = 0x037F;
#endif
}

void config_BSP(char *command, int size)
{
	printk(KERN_INFO "68VZ328 DragonBallVZ support (c) 2001 Lineo, Inc.\n");

#if defined(CONFIG_BOOTPARAM)
	strncpy(command, CONFIG_BOOTPARAM_STRING, size);
	command[size-1] = 0;
#else
	memset(command, 0, size);
#endif

	init_hardware();

	mach_sched_init = (void *)dragen2_sched_init;
	mach_tick = dragen2_tick;
	mach_gettimeoffset = dragen2_gettimeoffset;
	mach_reset = dragen2_reset;
	mach_gettod = dragen2_gettod;
}