ide: add ->set_irq method

Add ->set_irq method for setting nIEN bit of ATA Device Control
register and use it instead of ide_set_irq().

While at it:

* Use ->set_irq in init_irq() and do_reset1().

* Don't use HWIF() macro in ide_check_pm_state().

There should be no functional changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

7 files changed, 78 insertions, 30 deletions

diff --git a/drivers/ide/ide-io.c b/drivers/ide/ide-io.c
index fdc221ce9920..bbd7bd4c48ee 100644
--- a/drivers/ide/ide-io.c
+++ b/drivers/ide/ide-io.c
@@ -746,16 +746,17 @@ static void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
                  * the bus may be broken enough to walk on our toes at this
                  * point.
                  */
+                ide_hwif_t *hwif = drive->hwif;
                 int rc;
 #ifdef DEBUG_PM
                 printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
 #endif
-                rc = ide_wait_not_busy(HWIF(drive), 35000);
+                rc = ide_wait_not_busy(hwif, 35000);
                 if (rc)
                         printk(KERN_WARNING "%s: bus not ready on wakeup\n", drive->name);
                 SELECT_DRIVE(drive);
-                ide_set_irq(drive, 1);
-                rc = ide_wait_not_busy(HWIF(drive), 100000);
+                hwif->set_irq(hwif, 1);
+                rc = ide_wait_not_busy(hwif, 100000);
                 if (rc)
                         printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
         }
@@ -1041,7 +1042,7 @@ static void ide_do_request (ide_hwgroup_t *hwgroup, int masked_irq)
                          * quirk_list may not like intr setups/cleanups
                          */
                         if (drive->quirk_list != 1)
-                                ide_set_irq(drive, 0);
+                                hwif->set_irq(hwif, 0);
                 }
                 hwgroup->hwif = hwif;
                 hwgroup->drive = drive;
@@ -1519,6 +1520,7 @@ EXPORT_SYMBOL(ide_do_drive_cmd);
 
 void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
 {
+        ide_hwif_t *hwif = drive->hwif;
         ide_task_t task;
 
         memset(&task, 0, sizeof(task));
@@ -1529,9 +1531,9 @@ void ide_pktcmd_tf_load(ide_drive_t *drive, u32 tf_flags, u16 bcount, u8 dma)
         task.tf.lbah    = (bcount >> 8) & 0xff;
 
         ide_tf_dump(drive->name, &task.tf);
-        ide_set_irq(drive, 1);
+        hwif->set_irq(hwif, 1);
         SELECT_MASK(drive, 0);
-        drive->hwif->tf_load(drive, &task);
+        hwif->tf_load(drive, &task);
 }
 
 EXPORT_SYMBOL_GPL(ide_pktcmd_tf_load);
diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index e106954e13f9..41ec53f329fa 100644
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -135,6 +135,23 @@ static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
                 return inb(hwif->dma_base + ATA_DMA_STATUS);
 }
 
+static void ide_set_irq(ide_hwif_t *hwif, int on)
+{
+        u8 ctl = ATA_DEVCTL_OBS;
+
+        if (on == 4) { /* hack for SRST */
+                ctl |= 4;
+                on &= ~4;
+        }
+
+        ctl |= on ? 0 : 2;
+
+        if (hwif->host_flags & IDE_HFLAG_MMIO)
+                writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+        else
+                outb(ctl, hwif->io_ports.ctl_addr);
+}
+
 static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
 {
         ide_hwif_t *hwif = drive->hwif;
@@ -360,6 +377,8 @@ void default_hwif_transport(ide_hwif_t *hwif)
         hwif->read_altstatus      = ide_read_altstatus;
         hwif->read_sff_dma_status = ide_read_sff_dma_status;
 
+        hwif->set_irq     = ide_set_irq;
+
         hwif->tf_load     = ide_tf_load;
         hwif->tf_read     = ide_tf_read;
 
@@ -722,7 +741,7 @@ int ide_driveid_update(ide_drive_t *drive)
          */
 
         SELECT_MASK(drive, 1);
-        ide_set_irq(drive, 0);
+        hwif->set_irq(hwif, 0);
         msleep(50);
         hwif->exec_command(hwif, WIN_IDENTIFY);
         timeout = jiffies + WAIT_WORSTCASE;
@@ -808,12 +827,12 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
         SELECT_DRIVE(drive);
         SELECT_MASK(drive, 0);
         udelay(1);
-        ide_set_irq(drive, 0);
+        hwif->set_irq(hwif, 0);
         hwif->OUTB(speed, io_ports->nsect_addr);
         hwif->OUTB(SETFEATURES_XFER, io_ports->feature_addr);
         hwif->exec_command(hwif, WIN_SETFEATURES);
         if (drive->quirk_list == 2)
-                ide_set_irq(drive, 1);
+                hwif->set_irq(hwif, 1);
 
         error = __ide_wait_stat(drive, drive->ready_stat,
                                 BUSY_STAT|DRQ_STAT|ERR_STAT,
@@ -1129,7 +1148,6 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
         ide_hwgroup_t *hwgroup;
         struct ide_io_ports *io_ports;
         const struct ide_port_ops *port_ops;
-        u8 ctl;
 
         spin_lock_irqsave(&ide_lock, flags);
         hwif = HWIF(drive);
@@ -1174,16 +1192,15 @@ static ide_startstop_t do_reset1 (ide_drive_t *drive, int do_not_try_atapi)
          * immediate interrupt due to the edge transition it produces.
          * This single interrupt gives us a "fast poll" for drives that
          * recover from reset very quickly, saving us the first 50ms wait time.
+         *
+         * TODO: add ->softreset method and stop abusing ->set_irq
          */
         /* set SRST and nIEN */
-        hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | 6, io_ports->ctl_addr);
+        hwif->set_irq(hwif, 4);
         /* more than enough time */
         udelay(10);
-        if (drive->quirk_list == 2)
-                ctl = ATA_DEVCTL_OBS;           /* clear SRST and nIEN */
-        else
-                ctl = ATA_DEVCTL_OBS | 2;       /* clear SRST, leave nIEN */
-        hwif->OUTBSYNC(hwif, ctl, io_ports->ctl_addr);
+        /* clear SRST, leave nIEN (unless device is on the quirk list) */
+        hwif->set_irq(hwif, drive->quirk_list == 2);
         /* more than enough time */
         udelay(10);
         hwgroup->poll_timeout = jiffies + WAIT_WORSTCASE;
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index fe14d576ef01..475bd7263184 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -361,7 +361,7 @@ static int try_to_identify (ide_drive_t *drive, u8 cmd)
                         autoprobe = 1;
                         cookie = probe_irq_on();
                 }
-                ide_set_irq(drive, autoprobe);
+                hwif->set_irq(hwif, autoprobe);
         }
 
         retval = actual_try_to_identify(drive, cmd);
@@ -369,7 +369,7 @@ static int try_to_identify (ide_drive_t *drive, u8 cmd)
         if (autoprobe) {
                 int irq;
 
-                ide_set_irq(drive, 0);
+                hwif->set_irq(hwif, 0);
                 /* clear drive IRQ */
                 (void)hwif->read_status(hwif);
                 udelay(5);
@@ -709,7 +709,7 @@ static int ide_port_wait_ready(ide_hwif_t *hwif)
                 /* Ignore disks that we will not probe for later. */
                 if (!drive->noprobe || drive->present) {
                         SELECT_DRIVE(drive);
-                        ide_set_irq(drive, 1);
+                        hwif->set_irq(hwif, 1);
                         mdelay(2);
                         rc = ide_wait_not_busy(hwif, 35000);
                         if (rc)
@@ -1066,8 +1066,7 @@ static int init_irq (ide_hwif_t *hwif)
                         sa = IRQF_SHARED;
 
                 if (io_ports->ctl_addr)
-                        /* clear nIEN */
-                        hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS, io_ports->ctl_addr);
+                        hwif->set_irq(hwif, 1);
 
                 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
                         goto out_unlink;
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index fc2b3957afac..ea345369553e 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -80,7 +80,7 @@ ide_startstop_t do_rw_taskfile (ide_drive_t *drive, ide_task_t *task)
 
         if ((task->tf_flags & IDE_TFLAG_DMA_PIO_FALLBACK) == 0) {
                 ide_tf_dump(drive->name, tf);
-                ide_set_irq(drive, 1);
+                hwif->set_irq(hwif, 1);
                 SELECT_MASK(drive, 0);
                 hwif->tf_load(drive, task);
         }
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index a89dc4780786..727eda6db76c 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -149,6 +149,23 @@ static u8 scc_read_sff_dma_status(ide_hwif_t *hwif)
         return (u8)in_be32((void *)(hwif->dma_base + 4));
 }
 
+static void scc_set_irq(ide_hwif_t *hwif, int on)
+{
+        u8 ctl = ATA_DEVCTL_OBS;
+
+        if (on == 4) { /* hack for SRST */
+                ctl |= 4;
+                on &= ~4;
+        }
+
+        ctl |= on ? 0 : 2;
+
+        out_be32((void *)hwif->io_ports.ctl_addr, ctl);
+        eieio();
+        in_be32((void *)(hwif->dma_base + 0x01c));
+        eieio();
+}
+
 static void scc_ide_insw(unsigned long port, void *addr, u32 count)
 {
         u16 *ptr = (u16 *)addr;
@@ -802,6 +819,8 @@ static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
         hwif->read_altstatus      = scc_read_altstatus;
         hwif->read_sff_dma_status = scc_read_sff_dma_status;
 
+        hwif->set_irq = scc_set_irq;
+
         hwif->tf_load = scc_tf_load;
         hwif->tf_read = scc_tf_read;
 
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index 7c3a84f8fbed..a0d66480a797 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -502,6 +502,22 @@ static void pmac_exec_command(ide_hwif_t *hwif, u8 cmd)
                                      + IDE_TIMING_CONFIG));
 }
 
+static void pmac_set_irq(ide_hwif_t *hwif, int on)
+{
+        u8 ctl = ATA_DEVCTL_OBS;
+
+        if (on == 4) { /* hack for SRST */
+                ctl |= 4;
+                on &= ~4;
+        }
+
+        ctl |= on ? 0 : 2;
+
+        writeb(ctl, (void __iomem *)hwif->io_ports.ctl_addr);
+        (void)readl((void __iomem *)(hwif->io_ports.data_addr
+                                     + IDE_TIMING_CONFIG));
+}
+
 /*
  * Old tuning functions (called on hdparm -p), sets up drive PIO timings
  */
@@ -1100,6 +1116,7 @@ static int __devinit pmac_ide_setup_device(pmac_ide_hwif_t *pmif, hw_regs_t *hw)
                 return -ENOENT;
 
         hwif->exec_command = pmac_exec_command;
+        hwif->set_irq      = pmac_set_irq;
 
         /* Setup MMIO ops */
         default_hwif_mmiops(hwif);
diff --git a/include/linux/ide.h b/include/linux/ide.h
index e5fa5e868d67..ae93f89e4448 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -494,6 +494,8 @@ typedef struct hwif_s {
         u8      (*read_altstatus)(struct hwif_s *);
         u8      (*read_sff_dma_status)(struct hwif_s *);
 
+        void    (*set_irq)(struct hwif_s *, int);
+
         void (*tf_load)(ide_drive_t *, struct ide_task_s *);
         void (*tf_read)(ide_drive_t *, struct ide_task_s *);
 
@@ -1356,14 +1358,6 @@ static inline ide_drive_t *ide_get_paired_drive(ide_drive_t *drive)
         return &hwif->drives[(drive->dn ^ 1) & 1];
 }
 
-static inline void ide_set_irq(ide_drive_t *drive, int on)
-{
-        ide_hwif_t *hwif = drive->hwif;
-
-        hwif->OUTBSYNC(hwif, ATA_DEVCTL_OBS | (on ? 0 : 2),
-                       hwif->io_ports.ctl_addr);
-}
-
 static inline u8 ide_read_error(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = drive->hwif;