1 /*
2 * linux/arch/arm/mach-shark/arch.c
3 *
4 * Architecture specific stuff.
5 */
6 #include <linux/kernel.h>
7 #include <linux/init.h>
8 #include <linux/interrupt.h>
9 #include <linux/irq.h>
10 #include <linux/sched.h>
11 #include <linux/serial_8250.h>
12 #include <linux/io.h>
13
14 #include <asm/setup.h>
15 #include <asm/mach-types.h>
16 #include <asm/leds.h>
17 #include <asm/param.h>
18
19 #include <asm/mach/map.h>
20 #include <asm/mach/arch.h>
21 #include <asm/mach/time.h>
22
23 #define IO_BASE 0xe0000000
24 #define IO_SIZE 0x08000000
25 #define IO_START 0x40000000
26 #define ROMCARD_SIZE 0x08000000
27 #define ROMCARD_START 0x10000000
28
shark_restart(char mode,const char * cmd)29 static void shark_restart(char mode, const char *cmd)
30 {
31 short temp;
32 /* Reset the Machine via pc[3] of the sequoia chipset */
33 outw(0x09,0x24);
34 temp=inw(0x26);
35 temp = temp | (1<<3) | (1<<10);
36 outw(0x09,0x24);
37 outw(temp,0x26);
38 }
39
40 static struct plat_serial8250_port serial_platform_data[] = {
41 {
42 .iobase = 0x3f8,
43 .irq = 4,
44 .uartclk = 1843200,
45 .regshift = 0,
46 .iotype = UPIO_PORT,
47 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
48 },
49 {
50 .iobase = 0x2f8,
51 .irq = 3,
52 .uartclk = 1843200,
53 .regshift = 0,
54 .iotype = UPIO_PORT,
55 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
56 },
57 { },
58 };
59
60 static struct platform_device serial_device = {
61 .name = "serial8250",
62 .id = PLAT8250_DEV_PLATFORM,
63 .dev = {
64 .platform_data = serial_platform_data,
65 },
66 };
67
68 static struct resource rtc_resources[] = {
69 [0] = {
70 .start = 0x70,
71 .end = 0x73,
72 .flags = IORESOURCE_IO,
73 },
74 [1] = {
75 .start = IRQ_ISA_RTC_ALARM,
76 .end = IRQ_ISA_RTC_ALARM,
77 .flags = IORESOURCE_IRQ,
78 }
79 };
80
81 static struct platform_device rtc_device = {
82 .name = "rtc_cmos",
83 .id = -1,
84 .resource = rtc_resources,
85 .num_resources = ARRAY_SIZE(rtc_resources),
86 };
87
shark_init(void)88 static int __init shark_init(void)
89 {
90 int ret;
91
92 if (machine_is_shark())
93 {
94 ret = platform_device_register(&rtc_device);
95 if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret);
96 ret = platform_device_register(&serial_device);
97 if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret);
98 }
99 return 0;
100 }
101
102 arch_initcall(shark_init);
103
104 extern void shark_init_irq(void);
105
106 static struct map_desc shark_io_desc[] __initdata = {
107 {
108 .virtual = IO_BASE,
109 .pfn = __phys_to_pfn(IO_START),
110 .length = IO_SIZE,
111 .type = MT_DEVICE
112 }
113 };
114
shark_map_io(void)115 static void __init shark_map_io(void)
116 {
117 iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
118 }
119
120 #define IRQ_TIMER 0
121 #define HZ_TIME ((1193180 + HZ/2) / HZ)
122
123 static irqreturn_t
shark_timer_interrupt(int irq,void * dev_id)124 shark_timer_interrupt(int irq, void *dev_id)
125 {
126 timer_tick();
127 return IRQ_HANDLED;
128 }
129
130 static struct irqaction shark_timer_irq = {
131 .name = "Shark Timer Tick",
132 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
133 .handler = shark_timer_interrupt,
134 };
135
136 /*
137 * Set up timer interrupt, and return the current time in seconds.
138 */
shark_timer_init(void)139 static void __init shark_timer_init(void)
140 {
141 outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */
142 outb(HZ_TIME & 0xff, 0x40); /* LSB of count */
143 outb(HZ_TIME >> 8, 0x40);
144
145 setup_irq(IRQ_TIMER, &shark_timer_irq);
146 }
147
148 static struct sys_timer shark_timer = {
149 .init = shark_timer_init,
150 };
151
152 MACHINE_START(SHARK, "Shark")
153 /* Maintainer: Alexander Schulz */
154 .atag_offset = 0x3000,
155 .map_io = shark_map_io,
156 .init_irq = shark_init_irq,
157 .timer = &shark_timer,
158 .dma_zone_size = SZ_4M,
159 .restart = shark_restart,
160 MACHINE_END
161