diff options
Diffstat (limited to 'arch/powerpc/platforms/pasemi')
| -rw-r--r-- | arch/powerpc/platforms/pasemi/Kconfig | 10 | ||||
| -rw-r--r-- | arch/powerpc/platforms/pasemi/Makefile | 1 | ||||
| -rw-r--r-- | 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 7c5076e38ea..4275ff873aa 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 2cd2a4f26a4..f47fcac7e58 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 00000000000..12fb0c94926 --- /dev/null +++ b/arch/powerpc/platforms/pasemi/electra_ide.c @@ -0,0 +1,96 @@ +/* + * 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"); |