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 static volatile struct baboon *baboon;
29 extern int macide_ack_intr(struct ata_channel *);
33 * Baboon initialization.
36 void __init baboon_init(void)
38 if (macintosh_config->ident != MAC_MODEL_PB190) {
44 baboon = (struct baboon *) BABOON_BASE;
47 printk("Baboon detected at %p\n", baboon);
51 * Baboon interrupt handler. This works a lot like a VIA.
54 static irqreturn_t baboon_irq(int irq, void *dev_id)
60 printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X\n",
61 (uint) baboon->mb_control, (uint) baboon->mb_ifr,
62 (uint) baboon->mb_status);
65 if (!(events = baboon->mb_ifr & 0x07))
68 irq_num = IRQ_BABOON_0;
71 if (events & irq_bit) {
72 baboon->mb_ifr &= ~irq_bit;
73 m68k_handle_int(irq_num);
77 } while(events >= irq_bit);
79 if (baboon->mb_ifr & 0x02) macide_ack_intr(NULL);
80 /* for now we need to smash all interrupts */
81 baboon->mb_ifr &= ~events;
87 * Register the Baboon interrupt dispatcher on nubus slot $C.
90 void __init baboon_register_interrupts(void)
92 request_irq(IRQ_NUBUS_C, baboon_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
93 "baboon", (void *) baboon);
96 void baboon_irq_enable(int irq) {
98 printk("baboon_irq_enable(%d)\n", irq);
100 /* FIXME: figure out how to mask and unmask baboon interrupt sources */
101 enable_irq(IRQ_NUBUS_C);
104 void baboon_irq_disable(int irq) {
106 printk("baboon_irq_disable(%d)\n", irq);
108 disable_irq(IRQ_NUBUS_C);
111 void baboon_irq_clear(int irq) {
112 int irq_idx = IRQ_IDX(irq);
114 baboon->mb_ifr &= ~(1 << irq_idx);
117 int baboon_irq_pending(int irq)
119 int irq_idx = IRQ_IDX(irq);
121 return baboon->mb_ifr & (1 << irq_idx);