diff options
Diffstat (limited to 'arch/m68k/mac')
| -rw-r--r-- | arch/m68k/mac/via.c | 79 |
1 files changed, 32 insertions, 47 deletions
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c index 1bdb03c73c0..125404788e8 100644 --- a/arch/m68k/mac/via.c +++ b/arch/m68k/mac/via.c @@ -37,10 +37,6 @@ #include <asm/mac_psc.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 @@ -180,7 +176,7 @@ 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 +199,41 @@ 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 +249,17 @@ 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 */ @@ -466,21 +466,6 @@ 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; } |