| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 |