aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68knommu/platform/528x/config.c
blob: 036e1b73d94400b8619db75d71e271a5ce2592e3 (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
/***************************************************************************/

/*
 *	linux/arch/m68knommu/platform/528x/config.c
 *
 *	Sub-architcture dependant initialization code for the Motorola
 *	5280 and 5282 CPUs.
 *
 *	Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
 *	Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
 */

/***************************************************************************/

#include <linux/kernel.h>
#include <linux/param.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>
#include <linux/io.h>
#include <asm/machdep.h>
#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/mcfuart.h>
#include <asm/mcfqspi.h>

/***************************************************************************/

void coldfire_reset(void);

/***************************************************************************/

static struct mcf_platform_uart m528x_uart_platform[] = {
	{
		.mapbase	= MCF_MBAR + MCFUART_BASE1,
		.irq		= MCFINT_VECBASE + MCFINT_UART0,
	},
	{
		.mapbase 	= MCF_MBAR + MCFUART_BASE2,
		.irq		= MCFINT_VECBASE + MCFINT_UART0 + 1,
	},
	{
		.mapbase 	= MCF_MBAR + MCFUART_BASE3,
		.irq		= MCFINT_VECBASE + MCFINT_UART0 + 2,
	},
	{ },
};

static struct platform_device m528x_uart = {
	.name			= "mcfuart",
	.id			= 0,
	.dev.platform_data	= m528x_uart_platform,
};

static struct platform_device *m528x_devices[] __initdata = {
	&m528x_uart,
};

/***************************************************************************/

#define	INTC0	(MCF_MBAR + MCFICM_INTC0)

static void __init m528x_uart_init_line(int line, int irq)
{
	u8 port;
	u32 imr;

	if ((line < 0) || (line > 2))
		return;

	/* level 6, line based priority */
	writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);

	imr = readl(INTC0 + MCFINTC_IMRL);
	imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
	writel(imr, INTC0 + MCFINTC_IMRL);

	/* make sure PUAPAR is set for UART0 and UART1 */
	if (line < 2) {
		port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
		port |= (0x03 << (line * 2));
		writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
	}
}

static void __init m528x_uarts_init(void)
{
	const int nrlines = ARRAY_SIZE(m528x_uart_platform);
	int line;

	for (line = 0; (line < nrlines); line++)
		m528x_uart_init_line(line, m528x_uart_platform[line].irq);
}

/***************************************************************************/

void mcf_disableall(void)
{
	*((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
	*((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
}

/***************************************************************************/

void mcf_autovector(unsigned int vec)
{
	/* Everything is auto-vectored on the 5272 */
}

/***************************************************************************/

void __init config_BSP(char *commandp, int size)
{
	mcf_disableall();
	mach_reset = coldfire_reset;
}

/***************************************************************************/

static int __init init_BSP(void)
{
	m528x_uarts_init();
	platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
	return 0;
}

arch_initcall(init_BSP);

/***************************************************************************/