1 /***************************************************************************/
2
3 /*
4 * linux/arch/m68knommu/platform/528x/config.c
5 *
6 * Sub-architcture dependant initialization code for the Motorola
7 * 5280 and 5282 CPUs.
8 *
9 * Copyright (C) 1999-2003, Greg Ungerer (gerg@snapgear.com)
10 * Copyright (C) 2001-2003, SnapGear Inc. (www.snapgear.com)
11 */
12
13 /***************************************************************************/
14
15 #include <linux/kernel.h>
16 #include <linux/param.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/platform_device.h>
20 #include <linux/spi/spi.h>
21 #include <linux/spi/flash.h>
22 #include <linux/io.h>
23 #include <asm/machdep.h>
24 #include <asm/coldfire.h>
25 #include <asm/mcfsim.h>
26 #include <asm/mcfuart.h>
27
28 #ifdef CONFIG_MTD_PARTITIONS
29 #include <linux/mtd/partitions.h>
30 #endif
31
32 /***************************************************************************/
33
34 void coldfire_reset(void);
35
36 /***************************************************************************/
37
38 static struct mcf_platform_uart m528x_uart_platform[] = {
39 {
40 .mapbase = MCF_MBAR + MCFUART_BASE1,
41 .irq = MCFINT_VECBASE + MCFINT_UART0,
42 },
43 {
44 .mapbase = MCF_MBAR + MCFUART_BASE2,
45 .irq = MCFINT_VECBASE + MCFINT_UART0 + 1,
46 },
47 {
48 .mapbase = MCF_MBAR + MCFUART_BASE3,
49 .irq = MCFINT_VECBASE + MCFINT_UART0 + 2,
50 },
51 { },
52 };
53
54 static struct platform_device m528x_uart = {
55 .name = "mcfuart",
56 .id = 0,
57 .dev.platform_data = m528x_uart_platform,
58 };
59
60 static struct platform_device *m528x_devices[] __initdata = {
61 &m528x_uart,
62 };
63
64 /***************************************************************************/
65
66 #define INTC0 (MCF_MBAR + MCFICM_INTC0)
67
m528x_uart_init_line(int line,int irq)68 static void __init m528x_uart_init_line(int line, int irq)
69 {
70 u8 port;
71 u32 imr;
72
73 if ((line < 0) || (line > 2))
74 return;
75
76 /* level 6, line based priority */
77 writeb(0x30+line, INTC0 + MCFINTC_ICR0 + MCFINT_UART0 + line);
78
79 imr = readl(INTC0 + MCFINTC_IMRL);
80 imr &= ~((1 << (irq - MCFINT_VECBASE)) | 1);
81 writel(imr, INTC0 + MCFINTC_IMRL);
82
83 /* make sure PUAPAR is set for UART0 and UART1 */
84 if (line < 2) {
85 port = readb(MCF_MBAR + MCF5282_GPIO_PUAPAR);
86 port |= (0x03 << (line * 2));
87 writeb(port, MCF_MBAR + MCF5282_GPIO_PUAPAR);
88 }
89 }
90
m528x_uarts_init(void)91 static void __init m528x_uarts_init(void)
92 {
93 const int nrlines = ARRAY_SIZE(m528x_uart_platform);
94 int line;
95
96 for (line = 0; (line < nrlines); line++)
97 m528x_uart_init_line(line, m528x_uart_platform[line].irq);
98 }
99
100 /***************************************************************************/
101
mcf_disableall(void)102 void mcf_disableall(void)
103 {
104 *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRH)) = 0xffffffff;
105 *((volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFINTC_IMRL)) = 0xffffffff;
106 }
107
108 /***************************************************************************/
109
mcf_autovector(unsigned int vec)110 void mcf_autovector(unsigned int vec)
111 {
112 /* Everything is auto-vectored on the 5272 */
113 }
114
115 /***************************************************************************/
116
117 #ifdef CONFIG_WILDFIRE
wildfire_halt(void)118 void wildfire_halt(void)
119 {
120 writeb(0, 0x30000007);
121 writeb(0x2, 0x30000007);
122 }
123 #endif
124
125 #ifdef CONFIG_WILDFIREMOD
wildfiremod_halt(void)126 void wildfiremod_halt(void)
127 {
128 printk(KERN_INFO "WildFireMod hibernating...\n");
129
130 /* Set portE.5 to Digital IO */
131 MCF5282_GPIO_PEPAR &= ~(1 << (5 * 2));
132
133 /* Make portE.5 an output */
134 MCF5282_GPIO_DDRE |= (1 << 5);
135
136 /* Now toggle portE.5 from low to high */
137 MCF5282_GPIO_PORTE &= ~(1 << 5);
138 MCF5282_GPIO_PORTE |= (1 << 5);
139
140 printk(KERN_EMERG "Failed to hibernate. Halting!\n");
141 }
142 #endif
143
config_BSP(char * commandp,int size)144 void __init config_BSP(char *commandp, int size)
145 {
146 mcf_disableall();
147
148 #ifdef CONFIG_WILDFIRE
149 mach_halt = wildfire_halt;
150 #endif
151 #ifdef CONFIG_WILDFIREMOD
152 mach_halt = wildfiremod_halt;
153 #endif
154 }
155
156 /***************************************************************************/
157
init_BSP(void)158 static int __init init_BSP(void)
159 {
160 m528x_uarts_init();
161 platform_add_devices(m528x_devices, ARRAY_SIZE(m528x_devices));
162 return 0;
163 }
164
165 arch_initcall(init_BSP);
166
167 /***************************************************************************/
168