static void ami_int3(int irq, void *dev_id, struct pt_regs *fp)
{
unsigned short ints = custom.intreqr & custom.intenar;
static struct irq_server server = {0, 0};
/* if a blitter interrupt */
if (ints & IF_BLIT) {
custom.intreq = IF_BLIT;
amiga_do_irq(IRQ_IDX(IRQ_AMIGA_BLIT), fp);
}
/* if a copper interrupt */
if (ints & IF_COPER) {
custom.intreq = IF_COPER;
amiga_do_irq(IRQ_IDX(IRQ_AMIGA_COPPER), fp);
}
/* if a vertical blank interrupt */
if (ints & IF_VERTB)
amiga_do_irq_list(IRQ_IDX(IRQ_AMIGA_VERTB), fp, &server);
}
void baboon_irq_disable(int irq)
{
int irq_idx = IRQ_IDX(irq);
#ifdef DEBUG_IRQUSE
printk("baboon_irq_disable(%d)\n", irq);
#endif
baboon_disabled |= 1 << irq_idx;
if (baboon_disabled)
mac_disable_irq(IRQ_NUBUS_C);
}
void via_irq_enable(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
#ifdef DEBUG_IRQUSE
printk(KERN_DEBUG "via_irq_enable(%d)\n", irq);
#endif
if (irq_src == 1) {
via1[vIER] = irq_bit | 0x80;
} else if (irq_src == 2) {
/*
* Set vPCR for SCSI interrupts (but not on RBV)
*/
if ((irq_idx == 0) && !rbv_present) {
if (macintosh_config->scsi_type == MAC_SCSI_OLD) {
/* CB2 (IRQ) indep. input, positive edge */
/* CA2 (DRQ) indep. input, positive edge */
via2[vPCR] = 0x66;
} else {
/* CB2 (IRQ) indep. input, negative edge */
/* CA2 (DRQ) indep. input, negative edge */
via2[vPCR] = 0x22;
}
}
via2[gIER] = irq_bit | 0x80;
} else if (irq_src == 7) {
if (rbv_present) {
/* enable the slot interrupt. SIER works like IER. */
via2[rSIER] = IER_SET_BIT(irq_idx);
} else {
/* Make sure the bit is an input, to enable the irq */
/* But not on PowerBooks, that's ADB... */
if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
(macintosh_config->adb_type != MAC_ADB_PB2)) {
switch(macintosh_config->ident)
{
case MAC_MODEL_II:
case MAC_MODEL_IIX:
case MAC_MODEL_IICX:
case MAC_MODEL_SE30:
via2[vDirA] &= (~irq_bit | 0xc0);
break;
default:
via2[vDirA] &= ~irq_bit;
}
}
}
nubus_active |= irq_bit;
}
}
static void ami_int1(int irq, void *dev_id, struct pt_regs *fp)
{
unsigned short ints = custom.intreqr & custom.intenar;
/* if serial transmit buffer empty, interrupt */
if (ints & IF_TBE) {
custom.intreq = IF_TBE;
amiga_do_irq(IRQ_IDX(IRQ_AMIGA_TBE), fp);
}
/* if floppy disk transfer complete, interrupt */
if (ints & IF_DSKBLK) {
custom.intreq = IF_DSKBLK;
amiga_do_irq(IRQ_IDX(IRQ_AMIGA_DSKBLK), fp);
}
/* if software interrupt set, interrupt */
if (ints & IF_SOFT) {
custom.intreq = IF_SOFT;
amiga_do_irq(IRQ_IDX(IRQ_AMIGA_SOFT), fp);
}
}
void via_irq_clear(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
if (irq_src == 1) {
via1[vIFR] = irq_bit;
} else if (irq_src == 2) {
via2[gIFR] = irq_bit | rbv_clear;
} else if (irq_src == 7) {
/* FIXME: hmm.. */
}
}
void amiga_disable_irq(unsigned int irq)
{
if (irq >= AMI_IRQS) {
printk("%s: Unknown IRQ %d\n", __FUNCTION__, irq);
return;
}
if (ami_ablecount[irq]++)
return;
if (irq >= IRQ_IDX(IRQ_AMIGA_CIAB)) {
cia_able_irq(&ciab_base, 1 << (irq - IRQ_IDX(IRQ_AMIGA_CIAB)));
return;
}
if (irq >= IRQ_IDX(IRQ_AMIGA_CIAA)) {
cia_able_irq(&ciaa_base, 1 << (irq - IRQ_IDX(IRQ_AMIGA_CIAA)));
return;
}
/* disable the interrupt */
custom.intena = ami_intena_vals[irq];
}
int via_irq_pending(int irq)
{
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
if (irq_src == 1) {
return via1[vIFR] & irq_bit;
} else if (irq_src == 2) {
return via2[gIFR] & irq_bit;
} else if (irq_src == 7) {
return ~via2[gBufA] & irq_bit;
}
return 0;
}
void via_irq_clear(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
if (irq_src == 1) {
via1[vIFR] = irq_bit;
} else if (irq_src == 2) {
via2[gIFR] = irq_bit | rbv_clear;
} else if (irq_src == 7) {
/* FIXME: There is no way to clear an individual nubus slot
* IRQ flag, other than getting the device to do it.
*/
}
}
int via_irq_pending(int irq)
{
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
if (irq_src == 1) {
return via1[vIFR] & irq_bit;
} else if (irq_src == 2) {
return via2[gIFR] & irq_bit;
} else if (irq_src == 7) {
/* Always 0 for MAC_VIA_QUADRA if the slot irq is disabled. */
return ~via2[gBufA] & irq_bit;
}
return 0;
}
void via_nubus_irq_startup(int irq)
{
int irq_idx = IRQ_IDX(irq);
switch (macintosh_config->via_type) {
case MAC_VIA_II:
case MAC_VIA_QUADRA:
/* Make the port A line an input. Probably redundant. */
if (macintosh_config->via_type == MAC_VIA_II) {
/* The top two bits are RAM size outputs. */
via2[vDirA] &= 0xC0 | ~(1 << irq_idx);
} else {
/* Allow NuBus slots 9 through F. */
via2[vDirA] &= 0x80 | ~(1 << irq_idx);
}
/* fall through */
case MAC_VIA_IICI:
via_irq_enable(irq);
break;
}
}
int request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id)
{
if ((irq & IRQ_MACHSPEC) && mach_request_irq) {
return mach_request_irq(IRQ_IDX(irq), handler, flags,
devname, dev_id);
}
if (irq < 0 || irq >= NR_IRQS) {
printk("%s: Incorrect IRQ %d from %s\n", __FUNCTION__,
irq, devname);
return -ENXIO;
}
if (!(vec_list[irq].flags & IRQ_FLG_STD)) {
if (vec_list[irq].flags & IRQ_FLG_LOCK) {
printk("%s: IRQ %d from %s is not replaceable\n",
__FUNCTION__, irq, vec_list[irq].devname);
return -EBUSY;
}
if (flags & IRQ_FLG_REPLACE) {
printk("%s: %s can't replace IRQ %d from %s\n",
__FUNCTION__, devname, irq, vec_list[irq].devname);
return -EBUSY;
}
}
if (flags & IRQ_FLG_FAST) {
extern asmlinkage void fasthandler(void);
extern void set_evector(int vecnum, void (*handler)(void));
set_evector(irq, fasthandler);
}
vec_list[irq].handler = handler;
vec_list[irq].flags = flags;
vec_list[irq].dev_id = dev_id;
vec_list[irq].devname = devname;
return 0;
}
void via_irq_disable(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
if (irq_src == 1) {
via1[vIER] = IER_CLR_BIT(irq_idx);
} else if (irq_src == 2) {
via2[gIER] = IER_CLR_BIT(irq_idx);
} else if (irq_src == 7) {
switch (macintosh_config->via_type) {
case MAC_VIA_II:
case MAC_VIA_QUADRA:
nubus_disabled |= 1 << irq_idx;
if (nubus_disabled)
via2[gIER] = IER_CLR_BIT(1);
break;
case MAC_VIA_IICI:
via2[rSIER] = IER_CLR_BIT(irq_idx);
break;
}
}
}
void via_irq_enable(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
#ifdef DEBUG_IRQUSE
printk("via_irq_enable(%d)\n", irq);
#endif
if (irq_src == 1) {
via1[vIER] = irq_bit | 0x80;
} else if (irq_src == 2) {
/*
* Set vPCR for SCSI interrupts (but not on RBV)
*/
if ((irq_idx == 0) && !rbv_present) {
if (macintosh_config->scsi_type == MAC_SCSI_OLD) {
/* CB2 (IRQ) indep. input, positive edge */
/* CA2 (DRQ) indep. input, positive edge */
via2[vPCR] = 0x66;
} else {
/* CB2 (IRQ) indep. input, negative edge */
/* CA2 (DRQ) indep. input, negative edge */
via2[vPCR] = 0x22;
}
}
via2[gIER] = irq_bit | 0x80;
} else if (irq_src == 7) {
if (rbv_present) {
/* enable the slot interrupt. SIER works like IER. */
via2[rSIER] = IER_SET_BIT(irq_idx);
} else {
/* Make sure the bit is an input, to enable the irq */
via2[vDirA] &= ~irq_bit;
}
nubus_active |= irq_bit;
}
}
void via_irq_enable(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
#ifdef DEBUG_IRQUSE
printk(KERN_DEBUG "via_irq_enable(%d)\n", irq);
#endif
if (irq_src == 1) {
via1[vIER] = IER_SET_BIT(irq_idx);
} else if (irq_src == 2) {
if (irq != IRQ_MAC_NUBUS || nubus_disabled == 0)
via2[gIER] = IER_SET_BIT(irq_idx);
} else if (irq_src == 7) {
switch (macintosh_config->via_type) {
case MAC_VIA_II:
nubus_disabled &= ~(1 << irq_idx);
/* Enable the CA1 interrupt when no slot is disabled. */
if (!nubus_disabled)
via2[gIER] = IER_SET_BIT(1);
break;
case MAC_VIA_IIci:
/* On RBV, enable the slot interrupt.
* SIER works like IER.
*/
via2[rSIER] = IER_SET_BIT(irq_idx);
break;
case MAC_VIA_QUADRA:
/* Make the port A line an input to enable the slot irq.
* But not on PowerBooks, that's ADB.
*/
if ((macintosh_config->adb_type != MAC_ADB_PB1) &&
(macintosh_config->adb_type != MAC_ADB_PB2))
via2[vDirA] &= ~(1 << irq_idx);
break;
}
}
}
void via_irq_disable(int irq) {
int irq_src = IRQ_SRC(irq);
int irq_idx = IRQ_IDX(irq);
int irq_bit = 1 << irq_idx;
#ifdef DEBUG_IRQUSE
printk("via_irq_disable(%d)\n", irq);
#endif
if (irq_src == 1) {
via1[vIER] = irq_bit;
} else if (irq_src == 2) {
via2[gIER] = irq_bit;
} else if (irq_src == 7) {
if (rbv_present) {
/* disable the slot interrupt. SIER works like IER. */
via2[rSIER] = IER_CLR_BIT(irq_idx);
} else {
/* disable the nubus irq by changing dir to output */
via2[vDirA] |= irq_bit;
}
nubus_active &= ~irq_bit;
}
}
void free_irq(unsigned int irq, void *dev_id)
{
if (irq & IRQ_MACHSPEC) {
mach_free_irq(IRQ_IDX(irq), dev_id);
return;
}
if (irq < IRQ1 || irq > IRQ7) {
printk("%s: Incorrect IRQ %d\n", __FUNCTION__, irq);
return;
}
if (irq_list[irq].dev_id != dev_id)
printk("%s: Removing probably wrong IRQ %d from %s\n",
__FUNCTION__, irq, irq_list[irq].devname);
if (mach_default_handler)
irq_list[irq].handler = (*mach_default_handler)[irq];
else
irq_list[irq].handler = NULL;
irq_list[irq].flags = IRQ_FLG_STD;
irq_list[irq].dev_id = NULL;
irq_list[irq].devname = default_names[irq];
}
static void scc_irq_disable(int irq) {
int irq_idx = IRQ_IDX(irq);
scc_mask &= ~(1 << irq_idx);
}
static void scc_irq_enable(int irq) {
int irq_idx = IRQ_IDX(irq);
scc_mask |= (1 << irq_idx);
}
void disable_irq(unsigned int irq)
{
if ((irq & IRQ_MACHSPEC) && mach_disable_irq)
mach_disable_irq(IRQ_IDX(irq));
}
int baboon_irq_pending(int irq)
{
int irq_idx = IRQ_IDX(irq);
return baboon->mb_ifr & (1 << irq_idx);
}
void baboon_irq_clear(int irq) {
int irq_idx = IRQ_IDX(irq);
baboon->mb_ifr &= ~(1 << irq_idx);
}
int via2_scsi_drq_pending(void)
{
return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
}
