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 13#include <asm/setup.h> 14#include <asm/mach-types.h> 15#include <asm/io.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 23static struct plat_serial8250_port serial_platform_data[] = { 24 { 25 .iobase = 0x3f8, 26 .irq = 4, 27 .uartclk = 1843200, 28 .regshift = 0, 29 .iotype = UPIO_PORT, 30 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, 31 }, 32 { 33 .iobase = 0x2f8, 34 .irq = 3, 35 .uartclk = 1843200, 36 .regshift = 0, 37 .iotype = UPIO_PORT, 38 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, 39 }, 40 { }, 41}; 42 43static struct platform_device serial_device = { 44 .name = "serial8250", 45 .id = PLAT8250_DEV_PLATFORM, 46 .dev = { 47 .platform_data = serial_platform_data, 48 }, 49}; 50 51static int __init shark_init(void) 52{ 53 int ret; 54 55 if (machine_is_shark()) 56 ret = platform_device_register(&serial_device); 57 58 return ret; 59} 60 61arch_initcall(shark_init); 62 63extern void shark_init_irq(void); 64 65static struct map_desc shark_io_desc[] __initdata = { 66 { 67 .virtual = IO_BASE, 68 .pfn = __phys_to_pfn(IO_START), 69 .length = IO_SIZE, 70 .type = MT_DEVICE 71 } 72}; 73 74static void __init shark_map_io(void) 75{ 76 iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc)); 77} 78 79#define IRQ_TIMER 0 80#define HZ_TIME ((1193180 + HZ/2) / HZ) 81 82static irqreturn_t 83shark_timer_interrupt(int irq, void *dev_id) 84{ 85 write_seqlock(&xtime_lock); 86 timer_tick(); 87 write_sequnlock(&xtime_lock); 88 return IRQ_HANDLED; 89} 90 91static struct irqaction shark_timer_irq = { 92 .name = "Shark Timer Tick", 93 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, 94 .handler = shark_timer_interrupt, 95}; 96 97/* 98 * Set up timer interrupt, and return the current time in seconds. 99 */ 100static void __init shark_timer_init(void) 101{ 102 outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */ 103 outb(HZ_TIME & 0xff, 0x40); /* LSB of count */ 104 outb(HZ_TIME >> 8, 0x40); 105 106 setup_irq(IRQ_TIMER, &shark_timer_irq); 107} 108 109static struct sys_timer shark_timer = { 110 .init = shark_timer_init, 111}; 112 113MACHINE_START(SHARK, "Shark") 114 /* Maintainer: Alexander Schulz */ 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, 121MACHINE_END 122