Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8fa336d889caa72637e0860f53fa40ef66dcceaf
Commit: 8fa336d889caa72637e0860f53fa40ef66dcceaf
Parent: 0c358e70762861f8d479f3fa8bec358c599ba04a
Author: Olof Johansson <[EMAIL PROTECTED]>
AuthorDate: Sun May 13 00:50:41 2007 +1000
Committer: Paul Mackerras <[EMAIL PROTECTED]>
CommitDate: Mon Jun 25 16:58:05 2007 +1000
[POWERPC] pasemi: Electra IDE/pata_platform glue
Glue code to hook up the pata_platform on the PA Semi Electra eval board.
CFE sets up device tree entries for the IDE interface, with device type
'ide' and compatible field 'electra-ide'.
We unfortunately need to modify the resources before calling the generic
platform driver, since the device tree only has one register window in
it and the driver expects two. Adding this as an of_platform driver
instead doesn't give us any benefit, it just adds one more layer of
register/probe functions.
Since CONFIG_PATA_PLATFORM depends on CONFIG_EMBEDDED, add that as a
default for PPC_PASEMI.
Signed-off-by: Olof Johansson <[EMAIL PROTECTED]>
Signed-off-by: Paul Mackerras <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/pasemi/Kconfig | 10 +++
arch/powerpc/platforms/pasemi/Makefile | 1 +
arch/powerpc/platforms/pasemi/electra_ide.c | 96 +++++++++++++++++++++++++++
3 files changed, 107 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/pasemi/Kconfig
b/arch/powerpc/platforms/pasemi/Kconfig
index 7c5076e..4275ff8 100644
--- a/arch/powerpc/platforms/pasemi/Kconfig
+++ b/arch/powerpc/platforms/pasemi/Kconfig
@@ -5,6 +5,7 @@ config PPC_PASEMI
select MPIC
select PPC_UDBG_16550
select PPC_NATIVE
+ select EMBEDDED
help
This option enables support for PA Semi's PWRficient line
of SoC processors, including PA6T-1682M
@@ -25,4 +26,13 @@ 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 2cd2a4f..f47fcac 100644
--- a/arch/powerpc/platforms/pasemi/Makefile
+++ b/arch/powerpc/platforms/pasemi/Makefile
@@ -1,3 +1,4 @@
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
new file mode 100644
index 0000000..12fb0c9
--- /dev/null
+++ b/arch/powerpc/platforms/pasemi/electra_ide.c
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2007 PA Semi, Inc
+ *
+ * Maintained by: Olof Johansson <[EMAIL PROTECTED]>
+ *
+ * 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 <[EMAIL PROTECTED]>");
+MODULE_DESCRIPTION("PA Semi Electra IDE driver");
-
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