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/*
* linux/arch/arm/mach-shark/arch.c
*
* Architecture specific stuff.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/sched.h>
#include <linux/serial_8250.h>
#include <linux/io.h>
#include <asm/setup.h>
#include <asm/mach-types.h>
#include <asm/leds.h>
#include <asm/param.h>
#include <asm/mach/map.h>
#include <asm/mach/arch.h>
#include <asm/mach/time.h>
#define IO_BASE 0xe0000000
#define IO_SIZE 0x08000000
#define IO_START 0x40000000
#define ROMCARD_SIZE 0x08000000
#define ROMCARD_START 0x10000000
static void shark_restart(char mode, const char *cmd)
{
short temp;
/* Reset the Machine via pc[3] of the sequoia chipset */
outw(0x09,0x24);
temp=inw(0x26);
temp = temp | (1<<3) | (1<<10);
outw(0x09,0x24);
outw(temp,0x26);
}
static struct plat_serial8250_port serial_platform_data[] = {
{
.iobase = 0x3f8,
.irq = 4,
.uartclk = 1843200,
.regshift = 0,
.iotype = UPIO_PORT,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
{
.iobase = 0x2f8,
.irq = 3,
.uartclk = 1843200,
.regshift = 0,
.iotype = UPIO_PORT,
.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
},
{ },
};
static struct platform_device serial_device = {
.name = "serial8250",
.id = PLAT8250_DEV_PLATFORM,
.dev = {
.platform_data = serial_platform_data,
},
};
static struct resource rtc_resources[] = {
[0] = {
.start = 0x70,
.end = 0x73,
.flags = IORESOURCE_IO,
},
[1] = {
.start = IRQ_ISA_RTC_ALARM,
.end = IRQ_ISA_RTC_ALARM,
.flags = IORESOURCE_IRQ,
}
};
static struct platform_device rtc_device = {
.name = "rtc_cmos",
.id = -1,
.resource = rtc_resources,
.num_resources = ARRAY_SIZE(rtc_resources),
};
static int __init shark_init(void)
{
int ret;
if (machine_is_shark())
{
ret = platform_device_register(&rtc_device);
if (ret) printk(KERN_ERR "Unable to register RTC device: %d\n", ret);
ret = platform_device_register(&serial_device);
if (ret) printk(KERN_ERR "Unable to register Serial device: %d\n", ret);
}
return 0;
}
arch_initcall(shark_init);
extern void shark_init_irq(void);
static struct map_desc shark_io_desc[] __initdata = {
{
.virtual = IO_BASE,
.pfn = __phys_to_pfn(IO_START),
.length = IO_SIZE,
.type = MT_DEVICE
}
};
static void __init shark_map_io(void)
{
iotable_init(shark_io_desc, ARRAY_SIZE(shark_io_desc));
}
#define IRQ_TIMER 0
#define HZ_TIME ((1193180 + HZ/2) / HZ)
static irqreturn_t
shark_timer_interrupt(int irq, void *dev_id)
{
timer_tick();
return IRQ_HANDLED;
}
static struct irqaction shark_timer_irq = {
.name = "Shark Timer Tick",
.flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
.handler = shark_timer_interrupt,
};
/*
* Set up timer interrupt, and return the current time in seconds.
*/
static void __init shark_timer_init(void)
{
outb(0x34, 0x43); /* binary, mode 0, LSB/MSB, Ch 0 */
outb(HZ_TIME & 0xff, 0x40); /* LSB of count */
outb(HZ_TIME >> 8, 0x40);
setup_irq(IRQ_TIMER, &shark_timer_irq);
}
static struct sys_timer shark_timer = {
.init = shark_timer_init,
};
static void shark_init_early(void)
{
disable_hlt();
}
MACHINE_START(SHARK, "Shark")
/* Maintainer: Alexander Schulz */
.atag_offset = 0x3000,
.map_io = shark_map_io,
.init_early = shark_init_early,
.init_irq = shark_init_irq,
.timer = &shark_timer,
.dma_zone_size = SZ_4M,
.restart = shark_restart,
MACHINE_END
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