Linux-2.6.12-rc2
[linux-3.10.git] / 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       = 2,
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       = 2,
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                     = 0,
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         { IO_BASE       , IO_START      , IO_SIZE       , MT_DEVICE }
66 };
67
68 static void __init shark_map_io(void)
69 {
70         iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
71 }
72
73 #define IRQ_TIMER 0
74 #define HZ_TIME ((1193180 + HZ/2) / HZ)
75
76 static irqreturn_t
77 shark_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
78 {
79         write_seqlock(&xtime_lock);
80         timer_tick(regs);
81         write_sequnlock(&xtime_lock);
82         return IRQ_HANDLED;
83 }
84
85 static struct irqaction shark_timer_irq = {
86         .name           = "Shark Timer Tick",
87         .flags          = SA_INTERRUPT,
88         .handler        = shark_timer_interrupt
89 };
90
91 /*
92  * Set up timer interrupt, and return the current time in seconds.
93  */
94 static void __init shark_timer_init(void)
95 {
96         outb(0x34, 0x43);               /* binary, mode 0, LSB/MSB, Ch 0 */
97         outb(HZ_TIME & 0xff, 0x40);     /* LSB of count */
98         outb(HZ_TIME >> 8, 0x40);
99
100         setup_irq(IRQ_TIMER, &shark_timer_irq);
101 }
102
103 static struct sys_timer shark_timer = {
104         .init           = shark_timer_init,
105 };
106
107 MACHINE_START(SHARK, "Shark")
108         MAINTAINER("Alexander Schulz")
109         BOOT_MEM(0x08000000, 0x40000000, 0xe0000000)
110         BOOT_PARAMS(0x08003000)
111         MAPIO(shark_map_io)
112         INITIRQ(shark_init_irq)
113         .timer          = &shark_timer,
114 MACHINE_END