/* * linux/include/asm-arm/arch-nexuspci/time.h * * Copyright (c) 1997, 1998, 1999, 2000 FutureTV Labs Ltd. * * The FTV PCI card has no real-time clock.  We get timer ticks from the * SCC chip. *//* * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */static void timer_interrupt(int irq, void *dev_id, struct pt_regs *regs){	static int count = 25;	unsigned char stat = __raw_readb(DUART_BASE + 0x14);	if (!(stat & 0x10))		return;		/* Not for us */	/* Reset counter */	__raw_writeb(0x90, DUART_BASE + 8);	if (--count == 0) {		static int state = 1;		state ^= 1;		__raw_writeb(0x1a + state, INTCONT_BASE);		__raw_writeb(0x18 + state, INTCONT_BASE);		count = 50;	}	/* Wait for slow rise time */	__raw_readb(DUART_BASE + 0x14);	__raw_readb(DUART_BASE + 0x14);	__raw_readb(DUART_BASE + 0x14);	__raw_readb(DUART_BASE + 0x14);	__raw_readb(DUART_BASE + 0x14);	__raw_readb(DUART_BASE + 0x14);	do_timer(regs);	}static inline void setup_timer(void){	int tick = 3686400 / 16 / 2 / 100;	__raw_writeb(tick & 0xff, DUART_BASE + 0x1c);	__raw_writeb(tick >> 8, DUART_BASE + 0x18);	__raw_writeb(0x80, DUART_BASE + 8);	__raw_writeb(0x10, DUART_BASE + 0x14);	timer_irq.handler = timer_interrupt;	timer_irq.flags = SA_SHIRQ;	setup_arm_irq(IRQ_TIMER, &timer_irq);}