[PATCH v4 0/3] OF-platform PATA driver

[PATCH v4 0/3] OF-platform PATA driver

[Anton Vorontsov]

Hi all,

Here is the resend (aka v4) version of the OF-platform PATA
driver and related patches.

Changes since v3:
- Acked-by: Paul Mundt <lethal@linux-sh.org>
- In the powerpc specific patch: update defconfig and use
  machine_device_initcall -- this is new call found in the
  galak/powerpc.git.

Changes since v2:
- "PPC" added to PATA_PLATFORM "depends on" Kconfig entry;
  I didn't remove EMBEDDED "depends on" -- this wasn't discussed
  much and these patches should not depend on the decision.
- cosmetic fixes;
- "s/ioport_shift/reg_shift/g" patch dropped.

Changes since v1:
- __pata_platform_probe now accepts pio_mask argument;
- pata-platform compatible property renamed to ata-generic;
- pata_of_platform understands pio-mode property. It's used to pass
  pio_mask to the __pata_platform_probe. That is, in ata-generic
  context pio-mode means "pio mode the bus already configured for";
- New optional patch that renames pata_platform_info's
  ioport_shift to reg_shift.

Changes since RFC:
- nuked drivers/ata/pata_platform.h;
- powerpc bits: proper localbus node added.

-- 
Anton Vorontsov
email: cbou@mail.ru
backup email: ya-cbou@yandex.ru
irc://irc.freenode.net/bd2

[PATCH 1/3] [libata] pata_platform: make probe and remove functions device type neutral

[Anton Vorontsov]

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: Olof Johansson <olof@lixom.net>
Acked-by: Paul Mundt <lethal@linux-sh.org>
---
 drivers/ata/pata_platform.c   |  144 ++++++++++++++++++++++++----------------
 include/linux/pata_platform.h |    9 +++
 2 files changed, 95 insertions(+), 58 deletions(-)

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,
diff --git a/include/linux/pata_platform.h b/include/linux/pata_platform.h
index 5799e8d..6a7a92d 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 */
-- 
1.5.2.2

[PATCH 2/3] [libata] pata_of_platform: OF-Platform PATA device driver

[Anton Vorontsov]

This driver nicely wraps around pata_platform library functions,
and provides OF platform bus bindings to the PATA devices.

Also add || PPC to the PATA_PLATFORM's "depends on" Kconfig entry,
needed for PA Semi Electra.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Reviewed-by: Olof Johansson <olof@lixom.net>
---
 drivers/ata/Kconfig            |   12 ++++-
 drivers/ata/Makefile           |    1 +
 drivers/ata/pata_of_platform.c |  104 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 116 insertions(+), 1 deletions(-)
 create mode 100644 drivers/ata/pata_of_platform.c

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..b7bc4e4
--- /dev/null
+++ b/drivers/ata/pata_of_platform.c
@@ -0,0 +1,104 @@
+/*
+ * 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;
+	}
+
+	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", },
+	{},
+};
+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");
-- 
1.5.2.2

[PATCH 3/3] [POWERPC] MPC8349E-mITX: introduce localbus and pata nodes

[Anton Vorontsov]

This patch adds localbus and pata nodes to use CF IDE interface
on MPC8349E-mITX boards.

Patch also updates defconfig and adds some code to probe localbus.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
Acked-by: Olof Johansson <olof@lixom.net>
---
 arch/powerpc/boot/dts/mpc8349emitx.dts     |   17 ++++++++++++++++-
 arch/powerpc/configs/mpc834x_itx_defconfig |    3 ++-
 arch/powerpc/platforms/83xx/mpc834x_itx.c  |   12 ++++++++++++
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/boot/dts/mpc8349emitx.dts b/arch/powerpc/boot/dts/mpc8349emitx.dts
index e354f26..06d5b9c 100644
--- a/arch/powerpc/boot/dts/mpc8349emitx.dts
+++ b/arch/powerpc/boot/dts/mpc8349emitx.dts
@@ -253,6 +253,21 @@
 		device_type = "pci";
 	};
 
+	localbus@e0005000 {
+		#address-cells = <2>;
+		#size-cells = <1>;
+		compatible = "fsl,mpc8349e-localbus",
+			     "fsl,pq2pro-localbus";
+		reg = <e0005000 d8>;
+		ranges = <3 0 f0000000 210>;
 
-
+		pata@3,0 {
+			compatible = "fsl,mpc8349emitx-pata", "ata-generic";
+			reg = <3 0 10 3 20c 4>;
+			reg-shift = <1>;
+			pio-mode = <6>;
+			interrupts = <17 8>;
+			interrupt-parent = <&ipic>;
+		};
+	};
 };
diff --git a/arch/powerpc/configs/mpc834x_itx_defconfig b/arch/powerpc/configs/mpc834x_itx_defconfig
index 6feb86e..2fbe4e5 100644
--- a/arch/powerpc/configs/mpc834x_itx_defconfig
+++ b/arch/powerpc/configs/mpc834x_itx_defconfig
@@ -570,7 +570,8 @@ CONFIG_SATA_SIL=y
 # CONFIG_PATA_SIS is not set
 # CONFIG_PATA_VIA is not set
 # CONFIG_PATA_WINBOND is not set
-# CONFIG_PATA_PLATFORM is not set
+CONFIG_PATA_PLATFORM=y
+CONFIG_PATA_OF_PLATFORM=y
 CONFIG_MD=y
 CONFIG_BLK_DEV_MD=y
 CONFIG_MD_LINEAR=y
diff --git a/arch/powerpc/platforms/83xx/mpc834x_itx.c b/arch/powerpc/platforms/83xx/mpc834x_itx.c
index aa76819..50e8f63 100644
--- a/arch/powerpc/platforms/83xx/mpc834x_itx.c
+++ b/arch/powerpc/platforms/83xx/mpc834x_itx.c
@@ -23,6 +23,7 @@
 #include <linux/delay.h>
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
+#include <linux/of_platform.h>
 
 #include <asm/system.h>
 #include <asm/atomic.h>
@@ -37,6 +38,17 @@
 
 #include "mpc83xx.h"
 
+static struct of_device_id __initdata mpc834x_itx_ids[] = {
+	{ .compatible = "fsl,pq2pro-localbus", },
+	{},
+};
+
+static int __init mpc834x_itx_declare_of_platform_devices(void)
+{
+	return of_platform_bus_probe(NULL, mpc834x_itx_ids, NULL);
+}
+machine_device_initcall(mpc834x_itx, mpc834x_itx_declare_of_platform_devices);
+
 /* ************************************************************************
  *
  * Setup the architecture
-- 
1.5.2.2

Re: [PATCH 2/3] [libata] pata_of_platform: OF-Platform PATA device driver

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 361 bytes --]

Hi Anton,

Juts one small trivial comment (could be fixed later).

On Wed, 9 Jan 2008 22:10:41 +0300 Anton Vorontsov <avorontsov@ru.mvista.com> wrote:
>
> +static struct of_device_id pata_of_platform_match[] = {

This could be declared const.

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

[-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --]

Re: [PATCH 2/3] [libata] pata_of_platform: OF-Platform PATA device driver

[Olof Johansson]

On Thu, Jan 10, 2008 at 10:40:48AM +1100, Stephen Rothwell wrote:
> Hi Anton,
> 
> Juts one small trivial comment (could be fixed later).
> 
> On Wed, 9 Jan 2008 22:10:41 +0300 Anton Vorontsov <avorontsov@ru.mvista.com> wrote:
> >
> > +static struct of_device_id pata_of_platform_match[] = {
> 
> This could be declared const.

Good point, but let's not hold up merge based on this. Need something
for janitors to do too, and it's good enough to merge as-is. :)


-Olof

Re: [PATCH 2/3] [libata] pata_of_platform: OF-Platform PATA device driver

[Stephen Rothwell]

[-- Attachment #1: Type: text/plain, Size: 758 bytes --]

On Wed, 9 Jan 2008 18:36:34 -0600 Olof Johansson <olof@lixom.net> wrote:
>
> On Thu, Jan 10, 2008 at 10:40:48AM +1100, Stephen Rothwell wrote:
> > Hi Anton,
> > 
> > Juts one small trivial comment (could be fixed later).
> > 
> > On Wed, 9 Jan 2008 22:10:41 +0300 Anton Vorontsov <avorontsov@ru.mvista.com> wrote:
> > >
> > > +static struct of_device_id pata_of_platform_match[] = {
> > 
> > This could be declared const.
> 
> Good point, but let's not hold up merge based on this. Need something
> for janitors to do too, and it's good enough to merge as-is. :)

Absolutely. To me that is what "(could be fixed later)" means.  :-)

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au
http://www.canb.auug.org.au/~sfr/

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Re: [PATCH v4 0/3] OF-platform PATA driver

[Olof Johansson]

Hi,

I've applied 1/3 and 2/3 together with my electra_ide move to pasemi.git
for-2.6.25, and will ask Paul to pull that. Kumar said he'd take 3/3.

I also added the const to the match table as spotted by Stephen.


-Olof

On Wed, Jan 09, 2008 at 10:08:52PM +0300, Anton Vorontsov wrote:
> Hi all,
> 
> Here is the resend (aka v4) version of the OF-platform PATA
> driver and related patches.
> 
> Changes since v3:
> - Acked-by: Paul Mundt <lethal@linux-sh.org>
> - In the powerpc specific patch: update defconfig and use
>   machine_device_initcall -- this is new call found in the
>   galak/powerpc.git.
> 
> Changes since v2:
> - "PPC" added to PATA_PLATFORM "depends on" Kconfig entry;
>   I didn't remove EMBEDDED "depends on" -- this wasn't discussed
>   much and these patches should not depend on the decision.
> - cosmetic fixes;
> - "s/ioport_shift/reg_shift/g" patch dropped.
> 
> Changes since v1:
> - __pata_platform_probe now accepts pio_mask argument;
> - pata-platform compatible property renamed to ata-generic;
> - pata_of_platform understands pio-mode property. It's used to pass
>   pio_mask to the __pata_platform_probe. That is, in ata-generic
>   context pio-mode means "pio mode the bus already configured for";
> - New optional patch that renames pata_platform_info's
>   ioport_shift to reg_shift.
> 
> Changes since RFC:
> - nuked drivers/ata/pata_platform.h;
> - powerpc bits: proper localbus node added.
> 
> -- 
> Anton Vorontsov
> email: cbou@mail.ru
> backup email: ya-cbou@yandex.ru
> irc://irc.freenode.net/bd2
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev

[PATCH] [POWERPC] pasemi: Move electra-ide to pata_of_platform

[Olof Johansson]

Move electra-ide glue over to the new pata_of_platform framework, and
add the quirks needed to that driver.
    
---

Applied with the rest of the patches to pasemi.git for-2.6.25

 arch/powerpc/platforms/pasemi/electra_ide.c |   96 ----------------------------
 b/arch/powerpc/configs/pasemi_defconfig     |    4 -
 b/arch/powerpc/platforms/pasemi/Kconfig     |    9 --
 b/arch/powerpc/platforms/pasemi/Makefile    |    1 
 b/drivers/ata/pata_of_platform.c            |   20 ++++-
5 files changed, 17 insertions(+), 113 deletions(-)


diff --git a/arch/powerpc/configs/pasemi_defconfig b/arch/powerpc/configs/pasemi_defconfig
index 9d21b08..797f0df 100644
--- a/arch/powerpc/configs/pasemi_defconfig
+++ b/arch/powerpc/configs/pasemi_defconfig
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.24-rc6
-# Fri Dec 28 11:01:53 2007
+# Tue Jan 15 10:26:10 2008
 #
 CONFIG_PPC64=y
 
@@ -152,7 +152,6 @@ CONFIG_PPC_PASEMI=y
 CONFIG_PPC_PASEMI_IOMMU=y
 # CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE is not set
 CONFIG_PPC_PASEMI_MDIO=y
-CONFIG_ELECTRA_IDE=y
 # CONFIG_PPC_CELLEB is not set
 # CONFIG_PPC_PS3 is not set
 # CONFIG_PPC_CELL is not set
@@ -663,6 +662,7 @@ CONFIG_PATA_PCMCIA=y
 # CONFIG_PATA_VIA is not set
 # CONFIG_PATA_WINBOND is not set
 CONFIG_PATA_PLATFORM=y
+CONFIG_PATA_OF_PLATFORM=y
 CONFIG_MD=y
 CONFIG_BLK_DEV_MD=y
 CONFIG_MD_LINEAR=y
diff --git a/arch/powerpc/platforms/pasemi/Kconfig b/arch/powerpc/platforms/pasemi/Kconfig
index b3458a1..348e061 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -37,13 +37,4 @@ config PPC_PASEMI_MDIO
 	help
 	  Driver for MDIO via GPIO on PWRficient platforms
 
-config ELECTRA_IDE
-      tristate "Electra IDE driver"
-      default y
-      depends on PPC_PASEMI && ATA
-      select PATA_PLATFORM
-      help
-	This includes driver support for the Electra on-board IDE
-	interface.
-
 endmenu
diff --git a/arch/powerpc/platforms/pasemi/Makefile b/arch/powerpc/platforms/pasemi/Makefile
index f47fcac..2cd2a4f 100644
--- a/arch/powerpc/platforms/pasemi/Makefile
+++ b/arch/powerpc/platforms/pasemi/Makefile
@@ -1,4 +1,3 @@
 obj-y	+= setup.o pci.o time.o idle.o powersave.o iommu.o
 obj-$(CONFIG_PPC_PASEMI_MDIO)	+= gpio_mdio.o
-obj-$(CONFIG_ELECTRA_IDE) += electra_ide.o
 obj-$(CONFIG_PPC_PASEMI_CPUFREQ) += cpufreq.o
diff --git a/arch/powerpc/platforms/pasemi/electra_ide.c b/arch/powerpc/platforms/pasemi/electra_ide.c
deleted file mode 100644
index 12fb0c9..0000000
--- a/arch/powerpc/platforms/pasemi/electra_ide.c
+++ /dev/null
@@ -1,96 +0,0 @@
-/*
- * Copyright (C) 2007 PA Semi, Inc
- *
- * Maintained by: Olof Johansson <olof@lixom.net>
- *
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- */
-
-#include <linux/platform_device.h>
-
-#include <asm/prom.h>
-#include <asm/system.h>
-
-/* The electra IDE interface is incredibly simple: Just a device on the localbus
- * with interrupts hooked up to one of the GPIOs. The device tree contains the
- * address window and interrupt mappings already, and the pata_platform driver handles
- * the rest. We just need to hook the two up.
- */
-
-#define MAX_IFS	4	/* really, we have only one */
-
-static struct platform_device *pdevs[MAX_IFS];
-
-static int __devinit electra_ide_init(void)
-{
-	struct device_node *np;
-	struct resource r[3];
-	int ret = 0;
-	int i;
-
-	np = of_find_compatible_node(NULL, "ide", "electra-ide");
-	i = 0;
-
-	while (np && i < MAX_IFS) {
-		memset(r, 0, sizeof(r));
-
-		/* pata_platform wants two address ranges: one for the base registers,
-		 * another for the control (altstatus). It's located at offset 0x3f6 in
-		 * the window, but the device tree only has one large register window
-		 * that covers both ranges. So we need to split it up by hand here:
-		 */
-
-		ret = of_address_to_resource(np, 0, &r[0]);
-		if (ret)
-			goto out;
-		ret = of_address_to_resource(np, 0, &r[1]);
-		if (ret)
-			goto out;
-
-		r[1].start += 0x3f6;
-		r[0].end = r[1].start-1;
-
-		r[2].start = irq_of_parse_and_map(np, 0);
-		r[2].end = irq_of_parse_and_map(np, 0);
-		r[2].flags = IORESOURCE_IRQ;
-
-		pr_debug("registering platform device at 0x%lx/0x%lx, irq is %ld\n",
-			 r[0].start, r[1].start, r[2].start);
-		pdevs[i] = platform_device_register_simple("pata_platform", i, r, 3);
-		if (IS_ERR(pdevs[i])) {
-			ret = PTR_ERR(pdevs[i]);
-			pdevs[i] = NULL;
-			goto out;
-		}
-		np = of_find_compatible_node(np, "ide", "electra-ide");
-	}
-out:
-	return ret;
-}
-module_init(electra_ide_init);
-
-static void __devexit electra_ide_exit(void)
-{
-	int i;
-
-	for (i = 0; i < MAX_IFS; i++)
-		if (pdevs[i])
-			platform_device_unregister(pdevs[i]);
-}
-module_exit(electra_ide_exit);
-
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>");
-MODULE_DESCRIPTION("PA Semi Electra IDE driver");
diff --git a/drivers/ata/pata_of_platform.c b/drivers/ata/pata_of_platform.c
index b7bc4e4..938f48a 100644
--- a/drivers/ata/pata_of_platform.c
+++ b/drivers/ata/pata_of_platform.c
@@ -34,11 +34,20 @@ static int __devinit pata_of_platform_probe(struct of_device *ofdev,
 		return -EINVAL;
 	}
 
-	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;
+	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);
@@ -76,6 +85,7 @@ static int __devexit pata_of_platform_remove(struct of_device *ofdev)
 
 static struct of_device_id pata_of_platform_match[] = {
 	{ .compatible = "ata-generic", },
+	{ .compatible = "electra-ide", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, pata_of_platform_match);

Re: [PATCH] [POWERPC] pasemi: Move electra-ide to pata_of_platform

[Jeff Garzik]

Olof Johansson wrote:
> Move electra-ide glue over to the new pata_of_platform framework, and
> add the quirks needed to that driver.
>     
> ---
> 
> Applied with the rest of the patches to pasemi.git for-2.6.25
> 
>  arch/powerpc/platforms/pasemi/electra_ide.c |   96 ----------------------------
>  b/arch/powerpc/configs/pasemi_defconfig     |    4 -
>  b/arch/powerpc/platforms/pasemi/Kconfig     |    9 --
>  b/arch/powerpc/platforms/pasemi/Makefile    |    1 
>  b/drivers/ata/pata_of_platform.c            |   20 ++++-
> 5 files changed, 17 insertions(+), 113 deletions(-)

ACK

Re: [PATCH v4 0/3] OF-platform PATA driver

[Anton Vorontsov]

On Tue, Jan 15, 2008 at 10:40:22AM -0600, Olof Johansson wrote:
> Hi,
> 
> I've applied 1/3 and 2/3 together with my electra_ide move to pasemi.git
> for-2.6.25, and will ask Paul to pull that. Kumar said he'd take 3/3.
> 
> I also added the const to the match table as spotted by Stephen.

Great news, thank you!

-- 
Anton Vorontsov
email: cbou@mail.ru
backup email: ya-cbou@yandex.ru
irc://irc.freenode.net/bd2