Merge branch 'for-2.6.25' of master.kernel.org:/pub/scm/linux/kernel/git/olof/pasemi into for-2.6.25

4 files changed, 212 insertions, 59 deletions

diff --git a/drivers/ata/Kconfig b/drivers/ata/Kconfig
index ba63619..64b4964 100644
--- a/drivers/ata/Kconfig
+++ b/drivers/ata/Kconfig
@@ -607,13 +607,23 @@ config PATA_WINBOND_VLB
 
 config PATA_PLATFORM
 	tristate "Generic platform device PATA support"
-	depends on EMBEDDED || ARCH_RPC
+	depends on EMBEDDED || ARCH_RPC || PPC
 	help
 	  This option enables support for generic directly connected ATA
 	  devices commonly found on embedded systems.
 
 	  If unsure, say N.
 
+config PATA_OF_PLATFORM
+	tristate "OpenFirmware platform device PATA support"
+	depends on PATA_PLATFORM && PPC_OF
+	help
+	  This option enables support for generic directly connected ATA
+	  devices commonly found on embedded systems with OpenFirmware
+	  bindings.
+
+	  If unsure, say N.
+
 config PATA_ICSIDE
 	tristate "Acorn ICS PATA support"
 	depends on ARM && ARCH_ACORN
diff --git a/drivers/ata/Makefile b/drivers/ata/Makefile
index b13feb2..ebcee64 100644
--- a/drivers/ata/Makefile
+++ b/drivers/ata/Makefile
@@ -67,6 +67,7 @@ obj-$(CONFIG_PATA_IXP4XX_CF)	+= pata_ixp4xx_cf.o
 obj-$(CONFIG_PATA_SCC)		+= pata_scc.o
 obj-$(CONFIG_PATA_BF54X)	+= pata_bf54x.o
 obj-$(CONFIG_PATA_PLATFORM)	+= pata_platform.o
+obj-$(CONFIG_PATA_OF_PLATFORM)	+= pata_of_platform.o
 obj-$(CONFIG_PATA_ICSIDE)	+= pata_icside.o
 # Should be last but two libata driver
 obj-$(CONFIG_PATA_ACPI)		+= pata_acpi.o
diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
new file mode 100644
index 0000000..938f48a
--- /dev/null
+++ b/drivers/ata/pata_of_platform.c
@@ -0,0 +1,114 @@
+/*
+ * OF-platform PATA driver
+ *
+ * Copyright (c) 2007  MontaVista Software, Inc.
+ *                     Anton Vorontsov <avorontsov@ru.mvista.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (Version 2) as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/pata_platform.h>
+
+static int __devinit pata_of_platform_probe(struct of_device *ofdev,
+					    const struct of_device_id *match)
+{
+	int ret;
+	struct device_node *dn = ofdev->node;
+	struct resource io_res;
+	struct resource ctl_res;
+	struct resource irq_res;
+	unsigned int reg_shift = 0;
+	int pio_mode = 0;
+	int pio_mask;
+	const u32 *prop;
+
+	ret = of_address_to_resource(dn, 0, &io_res);
+	if (ret) {
+		dev_err(&ofdev->dev, "can't get IO address from "
+			"device tree\n");
+		return -EINVAL;
+	}
+
+	if (of_device_is_compatible(dn, "electra-ide")) {
+		/* Altstatus is really at offset 0x3f6 from the primary window
+		 * on electra-ide. Adjust ctl_res and io_res accordingly.
+		 */
+		ctl_res = io_res;
+		ctl_res.start = ctl_res.start+0x3f6;
+		io_res.end = ctl_res.start-1;
+	} else {
+		ret = of_address_to_resource(dn, 1, &ctl_res);
+		if (ret) {
+			dev_err(&ofdev->dev, "can't get CTL address from "
+				"device tree\n");
+			return -EINVAL;
+		}
+	}
+
+	ret = of_irq_to_resource(dn, 0, &irq_res);
+	if (ret == NO_IRQ)
+		irq_res.start = irq_res.end = -1;
+	else
+		irq_res.flags = 0;
+
+	prop = of_get_property(dn, "reg-shift", NULL);
+	if (prop)
+		reg_shift = *prop;
+
+	prop = of_get_property(dn, "pio-mode", NULL);
+	if (prop) {
+		pio_mode = *prop;
+		if (pio_mode > 6) {
+			dev_err(&ofdev->dev, "invalid pio-mode\n");
+			return -EINVAL;
+		}
+	} else {
+		dev_info(&ofdev->dev, "pio-mode unspecified, assuming PIO0\n");
+	}
+
+	pio_mask = 1 << pio_mode;
+	pio_mask |= (1 << pio_mode) - 1;
+
+	return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, &irq_res,
+				     reg_shift, pio_mask);
+}
+
+static int __devexit pata_of_platform_remove(struct of_device *ofdev)
+{
+	return __pata_platform_remove(&ofdev->dev);
+}
+
+static struct of_device_id pata_of_platform_match[] = {
+	{ .compatible = "ata-generic", },
+	{ .compatible = "electra-ide", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pata_of_platform_match);
+
+static struct of_platform_driver pata_of_platform_driver = {
+	.name		= "pata_of_platform",
+	.match_table	= pata_of_platform_match,
+	.probe		= pata_of_platform_probe,
+	.remove		= __devexit_p(pata_of_platform_remove),
+};
+
+static int __init pata_of_platform_init(void)
+{
+	return of_register_platform_driver(&pata_of_platform_driver);
+}
+module_init(pata_of_platform_init);
+
+static void __exit pata_of_platform_exit(void)
+{
+	of_unregister_platform_driver(&pata_of_platform_driver);
+}
+module_exit(pata_of_platform_exit);
+
+MODULE_DESCRIPTION("OF-platform PATA driver");
+MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/ata/pata_platform.c b/drivers/ata/pata_platform.c
index ac03a90..224bb6c 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,