[POWERPC] pasemi: Electra IDE/pata_platform glue (8fa336d8) · Commits · 戴 / test

arch/powerpc/platforms/pasemi/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -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

arch/powerpc/platforms/pasemi/Makefile

+1 −0

Original line number	Diff line number	Diff line
		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

arch/powerpc/platforms/pasemi/electra_ide.c

0 → 100644

+96 −0

Original line number	Diff line number	Diff line
		/*
		* 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");

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