2 * Baboon Custom IC Management
4 * The Baboon custom IC controls the IDE, PCMCIA and media bay on the
5 * PowerBook 190. It multiplexes multiple interrupt sources onto the
6 * Nubus slot $C interrupt.
9 #include <linux/types.h>
10 #include <linux/kernel.h>
12 #include <linux/delay.h>
13 #include <linux/init.h>
14 #include <linux/ide.h>
16 #include <asm/traps.h>
17 #include <asm/bootinfo.h>
18 #include <asm/macintosh.h>
19 #include <asm/macints.h>
20 #include <asm/mac_baboon.h>
22 /* #define DEBUG_BABOON */
23 /* #define DEBUG_IRQS */
26 volatile struct baboon *baboon;
28 irqreturn_t baboon_irq(int, void *);
31 extern int macide_ack_intr(struct ata_channel *);
35 * Baboon initialization.
38 void __init baboon_init(void)
40 if (macintosh_config->ident != MAC_MODEL_PB190) {
46 baboon = (struct baboon *) BABOON_BASE;
49 printk("Baboon detected at %p\n", baboon);
53 * Register the Baboon interrupt dispatcher on nubus slot $C.
56 void __init baboon_register_interrupts(void)
58 request_irq(IRQ_NUBUS_C, baboon_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
59 "baboon", (void *) baboon);
63 * Baboon interrupt handler. This works a lot like a VIA.
66 irqreturn_t baboon_irq(int irq, void *dev_id)
72 printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X\n",
73 (uint) baboon->mb_control, (uint) baboon->mb_ifr,
74 (uint) baboon->mb_status);
77 if (!(events = baboon->mb_ifr & 0x07))
80 irq_num = IRQ_BABOON_0;
83 if (events & irq_bit) {
84 baboon->mb_ifr &= ~irq_bit;
85 m68k_handle_int(irq_num);
89 } while(events >= irq_bit);
91 if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);
92 /* for now we need to smash all interrupts */
93 baboon->mb_ifr &= ~events;
98 void baboon_irq_enable(int irq) {
100 printk("baboon_irq_enable(%d)\n", irq);
102 /* FIXME: figure out how to mask and unmask baboon interrupt sources */
103 enable_irq(IRQ_NUBUS_C);
106 void baboon_irq_disable(int irq) {
108 printk("baboon_irq_disable(%d)\n", irq);
110 disable_irq(IRQ_NUBUS_C);
113 void baboon_irq_clear(int irq) {
114 int irq_idx = IRQ_IDX(irq);
116 baboon->mb_ifr &= ~(1 << irq_idx);
119 int baboon_irq_pending(int irq)
121 int irq_idx = IRQ_IDX(irq);
123 return baboon->mb_ifr & (1 << irq_idx);