/* * Baboon Custom IC Management * * The Baboon custom IC controls the IDE, PCMCIA and media bay on the * PowerBook 190. It multiplexes multiple interrupt sources onto the * Nubus slot $C interrupt. */#include <linux/types.h>#include <linux/kernel.h>#include <linux/mm.h>#include <linux/delay.h>#include <linux/init.h>#include <linux/ide.h>#include <asm/traps.h>#include <asm/bootinfo.h> #include <asm/macintosh.h> #include <asm/macints.h> #include <asm/mac_baboon.h>/* #define DEBUG_BABOON *//* #define DEBUG_IRQS */int baboon_present,baboon_active;volatile struct baboon *baboon;void baboon_irq(int, void *, struct pt_regs *);extern int macide_ack_intr(ide_hwif_t *);/* * Baboon initialization. */void __init baboon_init(void){	if (macintosh_config->ident != MAC_MODEL_PB190) {		baboon = NULL;		baboon_present = 0;		return;	}	baboon = (struct baboon *) BABOON_BASE;	baboon_present = 1;	baboon_active = 0;	printk("Baboon detected at %p\n", baboon);}/* * Register the Baboon interrupt dispatcher on nubus slot $C. */void __init baboon_register_interrupts(void){	request_irq(IRQ_NUBUS_C, baboon_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,		    "baboon", (void *) baboon);}/* * Baboon interrupt handler. This works a lot like a VIA. */void baboon_irq(int irq, void *dev_id, struct pt_regs *regs){	int irq_bit,i;	unsigned char events;#ifdef DEBUG_IRQS	printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X active %02X\n",		(uint) baboon->mb_control, (uint) baboon->mb_ifr,		(uint) baboon->mb_status,  baboon_active);#endif	if (!(events = baboon->mb_ifr & 0x07)) return;	for (i = 0, irq_bit = 1 ; i < 3 ; i++, irq_bit <<= 1) {	        if (events & irq_bit/* & baboon_active*/) {			baboon_active &= ~irq_bit;			mac_do_irq_list(IRQ_BABOON_0 + i, regs);			baboon_active |= irq_bit;			baboon->mb_ifr &= ~irq_bit;		}	}#if 0	if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);	/* for now we need to smash all interrupts */	baboon->mb_ifr &= ~events;#endif}void baboon_irq_enable(int irq) {	int irq_idx	= IRQ_IDX(irq);#ifdef DEBUG_IRQUSE	printk("baboon_irq_enable(%d)\n", irq);#endif	baboon_active |= (1 << irq_idx);}void baboon_irq_disable(int irq) {	int irq_idx	= IRQ_IDX(irq);#ifdef DEBUG_IRQUSE	printk("baboon_irq_disable(%d)\n", irq);#endif	baboon_active &= ~(1 << irq_idx);}void baboon_irq_clear(int irq) {	int irq_idx	= IRQ_IDX(irq);	baboon->mb_ifr &= ~(1 << irq_idx);}int baboon_irq_pending(int irq){	int irq_idx	= IRQ_IDX(irq);	return baboon->mb_ifr & (1 << irq_idx);}