mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 09:13:55 +08:00
feb11e8a56
The baboon_disabled hack is broken because it is missing an irq shutdown method. So releasing a Baboon irq kills the other Baboon irqs. But we don't really need this hack because we don't have media bay support and TREX uses a NuBus IRQ. Remove it. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
115 lines
2.4 KiB
C
115 lines
2.4 KiB
C
/*
|
|
* 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/irq.h>
|
|
|
|
#include <asm/macintosh.h>
|
|
#include <asm/macints.h>
|
|
#include <asm/mac_baboon.h>
|
|
|
|
/* #define DEBUG_IRQS */
|
|
|
|
int baboon_present;
|
|
static volatile struct baboon *baboon;
|
|
|
|
#if 0
|
|
extern int macide_ack_intr(struct ata_channel *);
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
|
|
printk("Baboon detected at %p\n", baboon);
|
|
}
|
|
|
|
/*
|
|
* Baboon interrupt handler. This works a lot like a VIA.
|
|
*/
|
|
|
|
static void baboon_irq(unsigned int irq, struct irq_desc *desc)
|
|
{
|
|
int irq_bit, irq_num;
|
|
unsigned char events;
|
|
|
|
#ifdef DEBUG_IRQS
|
|
printk("baboon_irq: mb_control %02X mb_ifr %02X mb_status %02X\n",
|
|
(uint) baboon->mb_control, (uint) baboon->mb_ifr,
|
|
(uint) baboon->mb_status);
|
|
#endif
|
|
|
|
events = baboon->mb_ifr & 0x07;
|
|
if (!events)
|
|
return;
|
|
|
|
irq_num = IRQ_BABOON_0;
|
|
irq_bit = 1;
|
|
do {
|
|
if (events & irq_bit) {
|
|
baboon->mb_ifr &= ~irq_bit;
|
|
generic_handle_irq(irq_num);
|
|
}
|
|
irq_bit <<= 1;
|
|
irq_num++;
|
|
} while(events >= 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
|
|
}
|
|
|
|
/*
|
|
* Register the Baboon interrupt dispatcher on nubus slot $C.
|
|
*/
|
|
|
|
void __init baboon_register_interrupts(void)
|
|
{
|
|
irq_set_chained_handler(IRQ_NUBUS_C, baboon_irq);
|
|
}
|
|
|
|
/*
|
|
* The means for masking individual Baboon interrupts remains a mystery.
|
|
* However, since we only use the IDE IRQ, we can just enable/disable all
|
|
* Baboon interrupts. If/when we handle more than one Baboon IRQ, we must
|
|
* either figure out how to mask them individually or else implement the
|
|
* same workaround that's used for NuBus slots (see nubus_disabled and
|
|
* via_nubus_irq_shutdown).
|
|
*/
|
|
|
|
void baboon_irq_enable(int irq)
|
|
{
|
|
#ifdef DEBUG_IRQUSE
|
|
printk("baboon_irq_enable(%d)\n", irq);
|
|
#endif
|
|
|
|
mac_irq_enable(irq_get_irq_data(IRQ_NUBUS_C));
|
|
}
|
|
|
|
void baboon_irq_disable(int irq)
|
|
{
|
|
#ifdef DEBUG_IRQUSE
|
|
printk("baboon_irq_disable(%d)\n", irq);
|
|
#endif
|
|
|
|
mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
|
|
}
|