diff options
Diffstat (limited to 'arch/m68k/mac/macints.c')
| -rw-r--r-- | arch/m68k/mac/macints.c | 101 |
1 files changed, 18 insertions, 83 deletions
diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c index 23711074e0e..900d899f332 100644 --- a/arch/m68k/mac/macints.c +++ b/arch/m68k/mac/macints.c @@ -34,9 +34,7 @@ * * 3 - unused (?) * - * 4 - SCC (slot number determined by reading RR3 on the SSC itself) - * - slot 1: SCC channel A - * - slot 2: SCC channel B + * 4 - SCC * * 5 - unused (?) * [serial errors or special conditions seem to raise level 6 @@ -55,8 +53,6 @@ * - slot 5: Slot $E * * 4 - SCC IOP - * - slot 1: SCC channel A - * - slot 2: SCC channel B * * 5 - ISM IOP (ADB?) * @@ -136,13 +132,8 @@ #include <asm/irq_regs.h> #include <asm/mac_oss.h> -#define DEBUG_SPURIOUS #define SHUTUP_SONIC -/* SCC interrupt mask */ - -static int scc_mask; - /* * VIA/RBV hooks */ @@ -191,13 +182,6 @@ extern void baboon_irq_disable(int); extern void baboon_irq_clear(int); /* - * SCC interrupt routines - */ - -static void scc_irq_enable(unsigned int); -static void scc_irq_disable(unsigned int); - -/* * console_loglevel determines NMI handler function */ @@ -221,8 +205,6 @@ void __init mac_init_IRQ(void) #ifdef DEBUG_MACINTS printk("mac_init_IRQ(): Setting things up...\n"); #endif - scc_mask = 0; - m68k_setup_irq_controller(&mac_irq_controller, IRQ_USER, NUM_MAC_SOURCES - IRQ_USER); /* Make sure the SONIC interrupt is cleared or things get ugly */ @@ -283,15 +265,16 @@ void mac_enable_irq(unsigned int irq) via_irq_enable(irq); break; case 3: - case 4: case 5: case 6: if (psc_present) psc_irq_enable(irq); else if (oss_present) oss_irq_enable(irq); - else if (irq_src == 4) - scc_irq_enable(irq); + break; + case 4: + if (psc_present) + psc_irq_enable(irq); break; case 8: if (baboon_present) @@ -316,15 +299,16 @@ void mac_disable_irq(unsigned int irq) via_irq_disable(irq); break; case 3: - case 4: case 5: case 6: if (psc_present) psc_irq_disable(irq); else if (oss_present) oss_irq_disable(irq); - else if (irq_src == 4) - scc_irq_disable(irq); + break; + case 4: + if (psc_present) + psc_irq_disable(irq); break; case 8: if (baboon_present) @@ -347,7 +331,6 @@ void mac_clear_irq(unsigned int irq) via_irq_clear(irq); break; case 3: - case 4: case 5: case 6: if (psc_present) @@ -355,6 +338,10 @@ void mac_clear_irq(unsigned int irq) else if (oss_present) oss_irq_clear(irq); break; + case 4: + if (psc_present) + psc_irq_clear(irq); + break; case 8: if (baboon_present) baboon_irq_clear(irq); @@ -374,13 +361,17 @@ int mac_irq_pending(unsigned int irq) else return via_irq_pending(irq); case 3: - case 4: case 5: case 6: if (psc_present) return psc_irq_pending(irq); else if (oss_present) return oss_irq_pending(irq); + break; + case 4: + if (psc_present) + psc_irq_pending(irq); + break; } return 0; } @@ -448,59 +439,3 @@ irqreturn_t mac_nmi_handler(int irq, void *dev_id) in_nmi--; return IRQ_HANDLED; } - -/* - * Simple routines for masking and unmasking - * SCC interrupts in cases where this can't be - * done in hardware (only the PSC can do that.) - */ - -static void scc_irq_enable(unsigned int irq) -{ - int irq_idx = IRQ_IDX(irq); - - scc_mask |= (1 << irq_idx); -} - -static void scc_irq_disable(unsigned int irq) -{ - int irq_idx = IRQ_IDX(irq); - - scc_mask &= ~(1 << irq_idx); -} - -/* - * SCC master interrupt handler. We have to do a bit of magic here - * to figure out what channel gave us the interrupt; putting this - * here is cleaner than hacking it into drivers/char/macserial.c. - */ - -void mac_scc_dispatch(int irq, void *dev_id) -{ - volatile unsigned char *scc = (unsigned char *) mac_bi_data.sccbase + 2; - unsigned char reg; - unsigned long flags; - - /* Read RR3 from the chip. Always do this on channel A */ - /* This must be an atomic operation so disable irqs. */ - - local_irq_save(flags); - *scc = 3; - reg = *scc; - local_irq_restore(flags); - - /* Now dispatch. Bits 0-2 are for channel B and */ - /* bits 3-5 are for channel A. We can safely */ - /* ignore the remaining bits here. */ - /* */ - /* Note that we're ignoring scc_mask for now. */ - /* If we actually mask the ints then we tend to */ - /* get hammered by very persistent SCC irqs, */ - /* and since they're autovector interrupts they */ - /* pretty much kill the system. */ - - if (reg & 0x38) - m68k_handle_int(IRQ_SCCA); - if (reg & 0x07) - m68k_handle_int(IRQ_SCCB); -} |