Commit 61f71621 authored by Anton Vorontsov's avatar Anton Vorontsov Committed by Olof Johansson

libata: pata_of_platform: OF-Platform PATA device driver

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: default avatarAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parent cf03613e
...@@ -607,13 +607,23 @@ config PATA_WINBOND_VLB ...@@ -607,13 +607,23 @@ config PATA_WINBOND_VLB
config PATA_PLATFORM config PATA_PLATFORM
tristate "Generic platform device PATA support" tristate "Generic platform device PATA support"
depends on EMBEDDED || ARCH_RPC depends on EMBEDDED || ARCH_RPC || PPC
help help
This option enables support for generic directly connected ATA This option enables support for generic directly connected ATA
devices commonly found on embedded systems. devices commonly found on embedded systems.
If unsure, say N. 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 config PATA_ICSIDE
tristate "Acorn ICS PATA support" tristate "Acorn ICS PATA support"
depends on ARM && ARCH_ACORN depends on ARM && ARCH_ACORN
......
...@@ -67,6 +67,7 @@ obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o ...@@ -67,6 +67,7 @@ obj-$(CONFIG_PATA_IXP4XX_CF) += pata_ixp4xx_cf.o
obj-$(CONFIG_PATA_SCC) += pata_scc.o obj-$(CONFIG_PATA_SCC) += pata_scc.o
obj-$(CONFIG_PATA_BF54X) += pata_bf54x.o obj-$(CONFIG_PATA_BF54X) += pata_bf54x.o
obj-$(CONFIG_PATA_PLATFORM) += pata_platform.o obj-$(CONFIG_PATA_PLATFORM) += pata_platform.o
obj-$(CONFIG_PATA_OF_PLATFORM) += pata_of_platform.o
obj-$(CONFIG_PATA_ICSIDE) += pata_icside.o obj-$(CONFIG_PATA_ICSIDE) += pata_icside.o
# Should be last but two libata driver # Should be last but two libata driver
obj-$(CONFIG_PATA_ACPI) += pata_acpi.o obj-$(CONFIG_PATA_ACPI) += pata_acpi.o
......
/*
* 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");
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