Merge branch 'upstream'
[linux-2.6] / arch / arm / mach-shark / core.c
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/sched.h>
10 #include <linux/serial_8250.h>
11
12 #include <asm/setup.h>
13 #include <asm/mach-types.h>
14 #include <asm/io.h>
15 #include <asm/leds.h>
16 #include <asm/param.h>
17
18 #include <asm/mach/map.h>
19 #include <asm/mach/arch.h>
20 #include <asm/mach/time.h>
21
22 static struct plat_serial8250_port serial_platform_data[] = {
23         {
24                 .iobase         = 0x3f8,
25                 .irq            = 4,
26                 .uartclk        = 1843200,
27                 .regshift       = 0,
28                 .iotype         = UPIO_PORT,
29                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
30         },
31         {
32                 .iobase         = 0x2f8,
33                 .irq            = 3,
34                 .uartclk        = 1843200,
35                 .regshift       = 0,
36                 .iotype         = UPIO_PORT,
37                 .flags          = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
38         },
39         { },
40 };
41
42 static struct platform_device serial_device = {
43         .name                   = "serial8250",
44         .id                     = PLAT8250_DEV_PLATFORM,
45         .dev                    = {
46                 .platform_data  = serial_platform_data,
47         },
48 };
49
50 static int __init shark_init(void)
51 {
52         int ret;
53
54         if (machine_is_shark())
55                 ret = platform_device_register(&serial_device);
56
57         return ret;
58 }
59
60 arch_initcall(shark_init);
61
62 extern void shark_init_irq(void);
63
64 static struct map_desc shark_io_desc[] __initdata = {
65         {
66                 .virtual        = IO_BASE,
67                 .pfn            = __phys_to_pfn(IO_START),
68                 .length         = IO_SIZE,
69                 .type           = MT_DEVICE
70         }
71 };
72
73 static void __init shark_map_io(void)
74 {
75         iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
76 }
77
78 #define IRQ_TIMER 0
79 #define HZ_TIME ((1193180 + HZ/2) / HZ)
80
81 static irqreturn_t
82 shark_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
83 {
84         write_seqlock(&xtime_lock);
85         timer_tick(regs);
86         write_sequnlock(&xtime_lock);
87         return IRQ_HANDLED;
88 }
89
90 static struct irqaction shark_timer_irq = {
91         .name           = "Shark Timer Tick",
92         .flags          = SA_INTERRUPT | SA_TIMER,
93         .handler        = shark_timer_interrupt,
94 };
95
96 /*
97  * Set up timer interrupt, and return the current time in seconds.
98  */
99 static void __init shark_timer_init(void)
100 {
101         outb(0x34, 0x43);               /* binary, mode 0, LSB/MSB, Ch 0 */
102         outb(HZ_TIME & 0xff, 0x40);     /* LSB of count */
103         outb(HZ_TIME >> 8, 0x40);
104
105         setup_irq(IRQ_TIMER, &shark_timer_irq);
106 }
107
108 static struct sys_timer shark_timer = {
109         .init           = shark_timer_init,
110 };
111
112 MACHINE_START(SHARK, "Shark")
113         /* Maintainer: Alexander Schulz */
114         .phys_ram       = 0x08000000,
115         .phys_io        = 0x40000000,
116         .io_pg_offst    = ((0xe0000000) >> 18) & 0xfffc,
117         .boot_params    = 0x08003000,
118         .map_io         = shark_map_io,
119         .init_irq       = shark_init_irq,
120         .timer          = &shark_timer,
121 MACHINE_END