mac68k: replace mac68k SCC code with platform device
Remove the old 68k Mac serial port code and a lot of related cruft. Add
new SCC platform devices to mac 68k platform.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c
index 2371107..900d899 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_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 @@
#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 @@
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 @@
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 @@
via_irq_clear(irq);
break;
case 3:
- case 4:
case 5:
case 6:
if (psc_present)
@@ -355,6 +338,10 @@
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 @@
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 @@
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);
-}