m68k/mac: cleanup mac_irq_pending

mac_irq_pending() has only one caller (mac_esp.c). Nothing tests for Baboon, PSC or OSS pending interrupts. Until that need arises, let's keep it simple and remove all the unused abstraction. Replace it with a routine to check for SCSI DRQ.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/include/asm/mac_via.h b/arch/m68k/include/asm/mac_via.h
index a59665e..3622cf8 100644 (file)
--- a/arch/m68k/include/asm/mac_via.h
+++ b/arch/m68k/include/asm/mac_via.h
@@ -254,6 +254,8 @@
 extern volatile __u8 *via1,*via2;
 extern int rbv_present,via_alt_mapping;
 
+extern int via2_scsi_drq_pending(void);
+
 static inline int rbv_set_video_bpp(int bpp)
 {
        char val = (bpp==1)?0:(bpp==2)?1:(bpp==4)?2:(bpp==8)?3:-1;

diff --git a/arch/m68k/include/asm/macintosh.h b/arch/m68k/include/asm/macintosh.h
index 12ebe43..e5bf02d 100644 (file)
--- a/arch/m68k/include/asm/macintosh.h
+++ b/arch/m68k/include/asm/macintosh.h
@@ -11,7 +11,7 @@
 extern void mac_reset(void);
 extern void mac_poweroff(void);
 extern void mac_init_IRQ(void);
-extern int mac_irq_pending(unsigned int);
+
 extern void mac_irq_enable(struct irq_data *data);
 extern void mac_irq_disable(struct irq_data *data);
 

diff --git a/arch/m68k/mac/baboon.c b/arch/m68k/mac/baboon.c
index b51ebaa..c974291 100644 (file)
--- a/arch/m68k/mac/baboon.c
+++ b/arch/m68k/mac/baboon.c
@@ -123,10 +123,3 @@ void baboon_irq_disable(int irq)
        if (baboon_disabled)
                mac_irq_disable(irq_get_irq_data(IRQ_NUBUS_C));
 }
-
-int baboon_irq_pending(int irq)
-{
-       int irq_idx = IRQ_IDX(irq);
-
-       return baboon->mb_ifr & (1 << irq_idx);
-}

diff --git a/arch/m68k/mac/macints.c b/arch/m68k/mac/macints.c
index 8fdd990..fb61471 100644 (file)
--- a/arch/m68k/mac/macints.c
+++ b/arch/m68k/mac/macints.c
@@ -142,7 +142,6 @@ extern void via_register_interrupts(void);
 extern void via_irq_enable(int);
 extern void via_irq_disable(int);
 extern void via_irq_clear(int);
-extern int  via_irq_pending(int);
 
 /*
  * OSS hooks
@@ -152,7 +151,6 @@ extern void oss_register_interrupts(void);
 extern void oss_irq_enable(int);
 extern void oss_irq_disable(int);
 extern void oss_irq_clear(int);
-extern int  oss_irq_pending(int);
 
 /*
  * PSC hooks
@@ -162,7 +160,6 @@ extern void psc_register_interrupts(void);
 extern void psc_irq_enable(int);
 extern void psc_irq_disable(int);
 extern void psc_irq_clear(int);
-extern int  psc_irq_pending(int);
 
 /*
  * IOP hooks
@@ -239,7 +236,6 @@ void __init mac_init_IRQ(void)
 /*
  *  mac_irq_enable - enable an interrupt source
  * mac_irq_disable - disable an interrupt source
- * mac_irq_pending - returns the pending status of an IRQ (nonzero = pending)
  *
  * These routines are just dispatchers to the VIA/OSS/PSC routines.
  */
@@ -314,34 +310,6 @@ void mac_irq_disable(struct irq_data *data)
        }
 }
 
-int mac_irq_pending(unsigned int irq)
-{
-       switch(IRQ_SRC(irq)) {
-       case 1:
-               return via_irq_pending(irq);
-       case 2:
-       case 7:
-               if (oss_present)
-                       return oss_irq_pending(irq);
-               else
-                       return via_irq_pending(irq);
-       case 3:
-       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)
-                       return psc_irq_pending(irq);
-               break;
-       }
-       return 0;
-}
-EXPORT_SYMBOL(mac_irq_pending);
-
 static int num_debug[8];
 
 irqreturn_t mac_debug_handler(int irq, void *dev_id)

diff --git a/arch/m68k/mac/oss.c b/arch/m68k/mac/oss.c
index 2344af3..a310197 100644 (file)
--- a/arch/m68k/mac/oss.c
+++ b/arch/m68k/mac/oss.c
@@ -219,32 +219,3 @@ void oss_irq_disable(int irq) {
 #endif
        }
 }
-
-/*
- * Check to see if a specific OSS interrupt is pending
- */
-
-int oss_irq_pending(int irq)
-{
-       switch(irq) {
-               case IRQ_MAC_SCC:
-                       return oss->irq_pending & OSS_IP_IOPSCC;
-                       break;
-               case IRQ_MAC_ADB:
-                       return oss->irq_pending & OSS_IP_IOPISM;
-                       break;
-               case IRQ_MAC_SCSI:
-                       return oss->irq_pending & OSS_IP_SCSI;
-                       break;
-               case IRQ_NUBUS_9:
-               case IRQ_NUBUS_A:
-               case IRQ_NUBUS_B:
-               case IRQ_NUBUS_C:
-               case IRQ_NUBUS_D:
-               case IRQ_NUBUS_E:
-                       irq -= NUBUS_SOURCE_BASE;
-                       return oss->irq_pending & (1 << irq);
-                       break;
-       }
-       return 0;
-}

diff --git a/arch/m68k/mac/psc.c b/arch/m68k/mac/psc.c
index 8dd71c5..6f026fc 100644 (file)
--- a/arch/m68k/mac/psc.c
+++ b/arch/m68k/mac/psc.c
@@ -180,12 +180,3 @@ void psc_irq_disable(int irq) {
 #endif
        psc_write_byte(pIER, 1 << irq_idx);
 }
-
-int psc_irq_pending(int irq)
-{
-       int irq_src     = IRQ_SRC(irq);
-       int irq_idx     = IRQ_IDX(irq);
-       int pIFR        = pIERbase + (irq_src << 4);
-
-       return psc_read_byte(pIFR) & (1 << irq_idx);
-}

diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 1c2bce7..105707a 100644 (file)
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -585,28 +585,6 @@ void via_irq_disable(int irq) {
        }
 }
 
-/*
- * Returns nonzero if an interrupt is pending on the given
- * VIA/IRQ combination.
- */
-
-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 via1_set_head(int head)
 {
        if (head == 0)
@@ -615,3 +593,9 @@ void via1_set_head(int head)
                via1[vBufA] |= VIA1A_vHeadSel;
 }
 EXPORT_SYMBOL(via1_set_head);
+
+int via2_scsi_drq_pending(void)
+{
+       return via2[gIFR] & (1 << IRQ_IDX(IRQ_MAC_SCSIDRQ));
+}
+EXPORT_SYMBOL(via2_scsi_drq_pending);

diff --git a/drivers/scsi/mac_esp.c b/drivers/scsi/mac_esp.c
index 590ce1e..4ceeace 100644 (file)
--- a/drivers/scsi/mac_esp.c
+++ b/drivers/scsi/mac_esp.c
@@ -25,6 +25,7 @@
 #include <asm/dma.h>
 #include <asm/macints.h>
 #include <asm/macintosh.h>
+#include <asm/mac_via.h>
 
 #include <scsi/scsi_host.h>
 
@@ -149,7 +150,7 @@ static inline int mac_esp_wait_for_dreq(struct esp *esp)
 
        do {
                if (mep->pdma_regs == NULL) {
-                       if (mac_irq_pending(IRQ_MAC_SCSIDRQ))
+                       if (via2_scsi_drq_pending())
                                return 0;
                } else {
                        if (nubus_readl(mep->pdma_regs) & 0x200)