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 29void arch_reset(char mode, const char *cmd) 30{ 31 short temp; 32 local_irq_disable(); 33 /* Reset the Machine via pc[3] of the sequoia chipset */ 34 outw(0x09,0x24); 35 temp=inw(0x26); 36 temp = temp | (1<<3) | (1<<10); 37 outw(0x09,0x24); 38 outw(temp,0x26); 39} 40 41static struct plat_serial8250_port serial_platform_data[] = { 42 { 43 .iobase = 0x3f8, 44 .irq = 4, 45 .uartclk = 1843200, 46 .regshift = 0, 47 .iotype = UPIO_PORT, 48 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, 49 }, 50 { 51 .iobase = 0x2f8, 52 .irq = 3, 53 .uartclk = 1843200, 54 .regshift = 0, 55 .iotype = UPIO_PORT, 56 .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, 57 }, 58 { }, 59}; 60 61static struct platform_device serial_device = { 62 .name = "serial8250", 63 .id = PLAT8250_DEV_PLATFORM, 64 .dev = { 65 .platform_data = serial_platform_data, 66 }, 67}; 68 69static struct resource rtc_resources[] = { 70 [0] = { 71 .start = 0x70, 72 .end = 0x73, 73 .flags = IORESOURCE_IO, 74 }, 75 [1] = { 76 .start = IRQ_ISA_RTC_ALARM, 77 .end = IRQ_ISA_RTC_ALARM, 78 .flags = IORESOURCE_IRQ, 79 } 80}; 81 82static struct platform_device rtc_device = { 83 .name = "rtc_cmos", 84 .id = -1, 85 .resource = rtc_resources, 86 .num_resources = ARRAY_SIZE(rtc_resources), 87}; 88 89static int __init shark_init(void) 90{ 91 int ret; 92 93 if (machine_is_shark()) 94 { 95 ret = platform_device_register(&rtc_device); 96 if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret); 97 ret = platform_device_register(&serial_device); 98 if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret); 99 } 100 return 0; 101} 102 103arch_initcall(shark_init); 104 105extern void shark_init_irq(void); 106 107static struct map_desc shark_io_desc[] __initdata = { 108 { 109 .virtual = IO_BASE, 110 .pfn = __phys_to_pfn(IO_START), 111 .length = IO_SIZE, 112 .type = MT_DEVICE 113 } 114}; 115 116static void __init shark_map_io(void) 117{ 118 iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc)); 119} 120 121#define IRQ_TIMER 0 122#define HZ_TIME ((1193180 + HZ/2) / HZ) 123 124static irqreturn_t 125shark_timer_interrupt(int irq, void *dev_id) 126{ 127 timer_tick(); 128 return IRQ_HANDLED; 129} 130 131static struct irqaction shark_timer_irq = { 132 .name = "Shark Timer Tick", 133 .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL, 134 .handler = shark_timer_interrupt, 135}; 136 137/* 138 * Set up timer interrupt, and return the current time in seconds. 139 */ 140static void __init shark_timer_init(void) 141{ 142 outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */ 143 outb(HZ_TIME & 0xff, 0x40); /* LSB of count */ 144 outb(HZ_TIME >> 8, 0x40); 145 146 setup_irq(IRQ_TIMER, &shark_timer_irq); 147} 148 149static struct sys_timer shark_timer = { 150 .init = shark_timer_init, 151}; 152 153MACHINE_START(SHARK, "Shark") 154 /* Maintainer: Alexander Schulz */ 155 .phys_io = 0x40000000, 156 .io_pg_offst = ((0xe0000000) >> 18) & 0xfffc, 157 .boot_params = 0x08003000, 158 .map_io = shark_map_io, 159 .init_irq = shark_init_irq, 160 .timer = &shark_timer, 161MACHINE_END 162