libata: pata_platform: make probe and remove functions device type neutral

Split pata_platform_{probe,remove} into two pieces:
1. pata_platform_{probe,remove} -- platform_device-dependant bits;
2. __ptata_platform_{probe,remove} -- device type neutral bits.

This is done to not duplicate code for the OF-platform driver.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Olof Johansson <olof@lixom.net>

2 files changed, 95 insertions, 58 deletions

diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index ac03a90a6168..224bb6c2030a 100644
--- a/drivers/ata/pata_platform.c
+++ b/drivers/ata/pata_platform.c
@@ -93,14 +93,9 @@ static struct ata_port_operations pata_platform_port_ops = {
 };
 
 static void pata_platform_setup_port(struct ata_ioports *ioaddr,
-                                     struct pata_platform_info *info)
+                                     unsigned int shift)
 {
-        unsigned int shift = 0;
-
         /* Fixup the port shift for platforms that need it */
-        if (info && info->ioport_shift)
-                shift = info->ioport_shift;
-
         ioaddr->data_addr       = ioaddr->cmd_addr + (ATA_REG_DATA    << shift);
         ioaddr->error_addr      = ioaddr->cmd_addr + (ATA_REG_ERR     << shift);
         ioaddr->feature_addr    = ioaddr->cmd_addr + (ATA_REG_FEATURE << shift);
@@ -114,8 +109,13 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr,
 }
 
 /**
- *      pata_platform_probe             -       attach a platform interface
- *      @pdev: platform device
+ *      __pata_platform_probe           -       attach a platform interface
+ *      @dev: device
+ *      @io_res: Resource representing I/O base
+ *      @ctl_res: Resource representing CTL base
+ *      @irq_res: Resource representing IRQ and its flags
+ *      @ioport_shift: I/O port shift
+ *      @__pio_mask: PIO mask
  *
  *      Register a platform bus IDE interface. Such interfaces are PIO and we
  *      assume do not support IRQ sharing.
@@ -135,42 +135,18 @@ static void pata_platform_setup_port(struct ata_ioports *ioaddr,
  *
  *      If no IRQ resource is present, PIO polling mode is used instead.
  */
-static int __devinit pata_platform_probe(struct platform_device *pdev)
+int __devinit __pata_platform_probe(struct device *dev,
+                                    struct resource *io_res,
+                                    struct resource *ctl_res,
+                                    struct resource *irq_res,
+                                    unsigned int ioport_shift,
+                                    int __pio_mask)
 {
-        struct resource *io_res, *ctl_res;
         struct ata_host *host;
         struct ata_port *ap;
-        struct pata_platform_info *pp_info;
         unsigned int mmio;
-        int irq;
-
-        /*
-         * Simple resource validation ..
-         */
-        if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
-                dev_err(&pdev->dev, "invalid number of resources\n");
-                return -EINVAL;
-        }
-
-        /*
-         * Get the I/O base first
-         */
-        io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
-        if (io_res == NULL) {
-                io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-                if (unlikely(io_res == NULL))
-                        return -EINVAL;
-        }
-
-        /*
-         * Then the CTL base
-         */
-        ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
-        if (ctl_res == NULL) {
-                ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-                if (unlikely(ctl_res == NULL))
-                        return -EINVAL;
-        }
+        int irq = 0;
+        int irq_flags = 0;
 
         /*
          * Check for MMIO
@@ -181,20 +157,21 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
         /*
          * And the IRQ
          */
-        irq = platform_get_irq(pdev, 0);
-        if (irq < 0)
-                irq = 0;        /* no irq */
+        if (irq_res && irq_res->start > 0) {
+                irq = irq_res->start;
+                irq_flags = irq_res->flags;
+        }
 
         /*
          * Now that that's out of the way, wire up the port..
          */
-        host = ata_host_alloc(&pdev->dev, 1);
+        host = ata_host_alloc(dev, 1);
         if (!host)
                 return -ENOMEM;
         ap = host->ports[0];
 
         ap->ops = &pata_platform_port_ops;
-        ap->pio_mask = pio_mask;
+        ap->pio_mask = __pio_mask;
         ap->flags |= ATA_FLAG_SLAVE_POSS;
 
         /*
@@ -209,25 +186,24 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
          * Handle the MMIO case
          */
         if (mmio) {
-                ap->ioaddr.cmd_addr = devm_ioremap(&pdev->dev, io_res->start,
+                ap->ioaddr.cmd_addr = devm_ioremap(dev, io_res->start,
                                 io_res->end - io_res->start + 1);
-                ap->ioaddr.ctl_addr = devm_ioremap(&pdev->dev, ctl_res->start,
+                ap->ioaddr.ctl_addr = devm_ioremap(dev, ctl_res->start,
                                 ctl_res->end - ctl_res->start + 1);
         } else {
-                ap->ioaddr.cmd_addr = devm_ioport_map(&pdev->dev, io_res->start,
+                ap->ioaddr.cmd_addr = devm_ioport_map(dev, io_res->start,
                                 io_res->end - io_res->start + 1);
-                ap->ioaddr.ctl_addr = devm_ioport_map(&pdev->dev, ctl_res->start,
+                ap->ioaddr.ctl_addr = devm_ioport_map(dev, ctl_res->start,
                                 ctl_res->end - ctl_res->start + 1);
         }
         if (!ap->ioaddr.cmd_addr || !ap->ioaddr.ctl_addr) {
-                dev_err(&pdev->dev, "failed to map IO/CTL base\n");
+                dev_err(dev, "failed to map IO/CTL base\n");
                 return -ENOMEM;
         }
 
         ap->ioaddr.altstatus_addr = ap->ioaddr.ctl_addr;
 
-        pp_info = pdev->dev.platform_data;
-        pata_platform_setup_port(&ap->ioaddr, pp_info);
+        pata_platform_setup_port(&ap->ioaddr, ioport_shift);
 
         ata_port_desc(ap, "%s cmd 0x%llx ctl 0x%llx", mmio ? "mmio" : "ioport",
                       (unsigned long long)io_res->start,
@@ -235,26 +211,78 @@ static int __devinit pata_platform_probe(struct platform_device *pdev)
 
         /* activate */
         return ata_host_activate(host, irq, irq ? ata_interrupt : NULL,
-                                 pp_info ? pp_info->irq_flags : 0,
-                                 &pata_platform_sht);
+                                 irq_flags, &pata_platform_sht);
 }
+EXPORT_SYMBOL_GPL(__pata_platform_probe);
 
 /**
- *      pata_platform_remove    -       unplug a platform interface
- *      @pdev: platform device
+ *      __pata_platform_remove          -       unplug a platform interface
+ *      @dev: device
  *
  *      A platform bus ATA device has been unplugged. Perform the needed
  *      cleanup. Also called on module unload for any active devices.
  */
-static int __devexit pata_platform_remove(struct platform_device *pdev)
+int __devexit __pata_platform_remove(struct device *dev)
 {
-        struct device *dev = &pdev->dev;
         struct ata_host *host = dev_get_drvdata(dev);
 
         ata_host_detach(host);
 
         return 0;
 }
+EXPORT_SYMBOL_GPL(__pata_platform_remove);
+
+static int __devinit pata_platform_probe(struct platform_device *pdev)
+{
+        struct resource *io_res;
+        struct resource *ctl_res;
+        struct resource *irq_res;
+        struct pata_platform_info *pp_info = pdev->dev.platform_data;
+
+        /*
+         * Simple resource validation ..
+         */
+        if ((pdev->num_resources != 3) && (pdev->num_resources != 2)) {
+                dev_err(&pdev->dev, "invalid number of resources\n");
+                return -EINVAL;
+        }
+
+        /*
+         * Get the I/O base first
+         */
+        io_res = platform_get_resource(pdev, IORESOURCE_IO, 0);
+        if (io_res == NULL) {
+                io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+                if (unlikely(io_res == NULL))
+                        return -EINVAL;
+        }
+
+        /*
+         * Then the CTL base
+         */
+        ctl_res = platform_get_resource(pdev, IORESOURCE_IO, 1);
+        if (ctl_res == NULL) {
+                ctl_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+                if (unlikely(ctl_res == NULL))
+                        return -EINVAL;
+        }
+
+        /*
+         * And the IRQ
+         */
+        irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (irq_res)
+                irq_res->flags = pp_info ? pp_info->irq_flags : 0;
+
+        return __pata_platform_probe(&pdev->dev, io_res, ctl_res, irq_res,
+                                     pp_info ? pp_info->ioport_shift : 0,
+                                     pio_mask);
+}
+
+static int __devexit pata_platform_remove(struct platform_device *pdev)
+{
+        return __pata_platform_remove(&pdev->dev);
+}
 
 static struct platform_driver pata_platform_driver = {
         .probe          = pata_platform_probe,
diff --git a/include/linux/pata_platform.h b/include/linux/pata_platform.h
index 5799e8d50623..6a7a92db294c 100644
--- a/include/linux/pata_platform.h
+++ b/include/linux/pata_platform.h
@@ -15,4 +15,13 @@ struct pata_platform_info {
         unsigned int irq_flags;
 };
 
+extern int __devinit __pata_platform_probe(struct device *dev,
+                                           struct resource *io_res,
+                                           struct resource *ctl_res,
+                                           struct resource *irq_res,
+                                           unsigned int ioport_shift,
+                                           int __pio_mask);
+
+extern int __devexit __pata_platform_remove(struct device *dev);
+
 #endif /* __LINUX_PATA_PLATFORM_H */