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Diffstat (limited to 'arch/m68k/mac/via.c')
-rw-r--r--arch/m68k/mac/via.c115
1 files changed, 53 insertions, 62 deletions
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 1bdb03c73c0..7d97ba54536 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -32,15 +32,11 @@
#include <asm/bootinfo.h>
#include <asm/macintosh.h>
#include <asm/macints.h>
-#include <asm/machw.h>
#include <asm/mac_via.h>
#include <asm/mac_psc.h>
+#include <asm/mac_oss.h>
volatile __u8 *via1, *via2;
-#if 0
-/* See note in mac_via.h about how this is possibly not useful */
-volatile long *via_memory_bogon=(long *)&via_memory_bogon;
-#endif
int rbv_present;
int via_alt_mapping;
EXPORT_SYMBOL(via_alt_mapping);
@@ -66,7 +62,7 @@ static int gIER,gIFR,gBufA,gBufB;
#define MAC_CLOCK_LOW (MAC_CLOCK_TICK&0xFF)
#define MAC_CLOCK_HIGH (MAC_CLOCK_TICK>>8)
-/* To disable a NuBus slot on Quadras we make the slot IRQ lines outputs, set
+/* To disable a NuBus slot on Quadras we make that slot IRQ line an output set
* high. On RBV we just use the slot interrupt enable register. On Macs with
* genuine VIA chips we must use nubus_disabled to keep track of disabled slot
* interrupts. When any slot IRQ is disabled we mask the (edge triggered) CA1
@@ -89,7 +85,6 @@ void via_irq_disable(int irq);
void via_irq_clear(int irq);
extern irqreturn_t mac_scc_dispatch(int, void *);
-extern int oss_present;
/*
* Initialize the VIAs
@@ -180,7 +175,7 @@ void __init via_init(void)
via1[vT1CH] = 0;
via1[vT2CL] = 0;
via1[vT2CH] = 0;
- via1[vACR] &= 0x3F;
+ via1[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
via1[vACR] &= ~0x03; /* disable port A & B latches */
/*
@@ -203,40 +198,41 @@ void __init via_init(void)
/* Everything below this point is VIA2/RBV only... */
- if (oss_present) return;
+ if (oss_present)
+ return;
-#if 1
/* Some machines support an alternate IRQ mapping that spreads */
/* Ethernet and Sound out to their own autolevel IRQs and moves */
/* VIA1 to level 6. A/UX uses this mapping and we do too. Note */
/* that the IIfx emulates this alternate mapping using the OSS. */
- switch(macintosh_config->ident) {
- case MAC_MODEL_P475:
- case MAC_MODEL_P475F:
- case MAC_MODEL_P575:
- case MAC_MODEL_Q605:
- case MAC_MODEL_Q605_ACC:
- case MAC_MODEL_C610:
- case MAC_MODEL_Q610:
- case MAC_MODEL_Q630:
- case MAC_MODEL_C650:
- case MAC_MODEL_Q650:
- case MAC_MODEL_Q700:
- case MAC_MODEL_Q800:
- case MAC_MODEL_Q900:
- case MAC_MODEL_Q950:
+ via_alt_mapping = 0;
+ if (macintosh_config->via_type == MAC_VIA_QUADRA)
+ switch (macintosh_config->ident) {
+ case MAC_MODEL_C660:
+ case MAC_MODEL_Q840:
+ /* not applicable */
+ break;
+ case MAC_MODEL_P588:
+ case MAC_MODEL_TV:
+ case MAC_MODEL_PB140:
+ case MAC_MODEL_PB145:
+ case MAC_MODEL_PB160:
+ case MAC_MODEL_PB165:
+ case MAC_MODEL_PB165C:
+ case MAC_MODEL_PB170:
+ case MAC_MODEL_PB180:
+ case MAC_MODEL_PB180C:
+ case MAC_MODEL_PB190:
+ case MAC_MODEL_PB520:
+ /* not yet tested */
+ break;
+ default:
via_alt_mapping = 1;
via1[vDirB] |= 0x40;
via1[vBufB] &= ~0x40;
break;
- default:
- via_alt_mapping = 0;
- break;
- }
-#else
- via_alt_mapping = 0;
-#endif
+ }
/*
* Now initialize VIA2. For RBV we just kill all interrupts;
@@ -252,14 +248,17 @@ void __init via_init(void)
via2[vT1CH] = 0;
via2[vT2CL] = 0;
via2[vT2CH] = 0;
- via2[vACR] &= 0x3F;
+ via2[vACR] &= ~0xC0; /* setup T1 timer with no PB7 output */
via2[vACR] &= ~0x03; /* disable port A & B latches */
}
/*
- * Set vPCR for SCSI interrupts (but not on RBV)
+ * Set vPCR for control line interrupts (but not on RBV)
*/
if (!rbv_present) {
+ /* For all VIA types, CA1 (SLOTS IRQ) and CB1 (ASC IRQ)
+ * are made negative edge triggered here.
+ */
if (macintosh_config->scsi_type == MAC_SCSI_OLD) {
/* CB2 (IRQ) indep. input, positive edge */
/* CA2 (DRQ) indep. input, positive edge */
@@ -284,7 +283,8 @@ void __init via_init_clock(irq_handler_t func)
via1[vT1CL] = MAC_CLOCK_LOW;
via1[vT1CH] = MAC_CLOCK_HIGH;
- request_irq(IRQ_MAC_TIMER_1, func, IRQ_FLG_LOCK, "timer", func);
+ if (request_irq(IRQ_MAC_TIMER_1, func, IRQ_FLG_LOCK, "timer", func))
+ pr_err("Couldn't register %s interrupt\n", "timer");
}
/*
@@ -294,25 +294,31 @@ void __init via_init_clock(irq_handler_t func)
void __init via_register_interrupts(void)
{
if (via_alt_mapping) {
- request_irq(IRQ_AUTO_1, via1_irq,
+ if (request_irq(IRQ_AUTO_1, via1_irq,
IRQ_FLG_LOCK|IRQ_FLG_FAST, "software",
- (void *) via1);
- request_irq(IRQ_AUTO_6, via1_irq,
+ (void *) via1))
+ pr_err("Couldn't register %s interrupt\n", "software");
+ if (request_irq(IRQ_AUTO_6, via1_irq,
IRQ_FLG_LOCK|IRQ_FLG_FAST, "via1",
- (void *) via1);
+ (void *) via1))
+ pr_err("Couldn't register %s interrupt\n", "via1");
} else {
- request_irq(IRQ_AUTO_1, via1_irq,
+ if (request_irq(IRQ_AUTO_1, via1_irq,
IRQ_FLG_LOCK|IRQ_FLG_FAST, "via1",
- (void *) via1);
+ (void *) via1))
+ pr_err("Couldn't register %s interrupt\n", "via1");
}
- request_irq(IRQ_AUTO_2, via2_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
- "via2", (void *) via2);
+ if (request_irq(IRQ_AUTO_2, via2_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
+ "via2", (void *) via2))
+ pr_err("Couldn't register %s interrupt\n", "via2");
if (!psc_present) {
- request_irq(IRQ_AUTO_4, mac_scc_dispatch, IRQ_FLG_LOCK,
- "scc", mac_scc_dispatch);
+ if (request_irq(IRQ_AUTO_4, mac_scc_dispatch, IRQ_FLG_LOCK,
+ "scc", mac_scc_dispatch))
+ pr_err("Couldn't register %s interrupt\n", "scc");
}
- request_irq(IRQ_MAC_NUBUS, via_nubus_irq, IRQ_FLG_LOCK|IRQ_FLG_FAST,
- "nubus", (void *) via2);
+ if (request_irq(IRQ_MAC_NUBUS, via_nubus_irq,
+ IRQ_FLG_LOCK|IRQ_FLG_FAST, "nubus", (void *) via2))
+ pr_err("Couldn't register %s interrupt\n", "nubus");
}
/*
@@ -466,21 +472,6 @@ irqreturn_t via1_irq(int irq, void *dev_id)
++irq_num;
irq_bit <<= 1;
} while (events >= irq_bit);
-
-#if 0 /* freakin' pmu is doing weird stuff */
- if (!oss_present) {
- /* This (still) seems to be necessary to get IDE
- working. However, if you enable VBL interrupts,
- you're screwed... */
- /* FIXME: should we check the SLOTIRQ bit before
- pulling this stunt? */
- /* No, it won't be set. that's why we're doing this. */
- via_irq_disable(IRQ_MAC_NUBUS);
- via_irq_clear(IRQ_MAC_NUBUS);
- m68k_handle_int(IRQ_MAC_NUBUS);
- via_irq_enable(IRQ_MAC_NUBUS);
- }
-#endif
return IRQ_HANDLED;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 17:24:36 +0000