100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* OF-platform PATA driver
|
|
*
|
|
* Copyright (c) 2007 MontaVista Software, Inc.
|
|
* Anton Vorontsov <avorontsov@ru.mvista.com>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/ata_platform.h>
|
|
#include <linux/libata.h>
|
|
|
|
#define DRV_NAME "pata_of_platform"
|
|
|
|
static struct scsi_host_template pata_platform_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
static int pata_of_platform_probe(struct platform_device *ofdev)
|
|
{
|
|
int ret;
|
|
struct device_node *dn = ofdev->dev.of_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;
|
|
bool use16bit;
|
|
int irq;
|
|
|
|
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;
|
|
}
|
|
|
|
memset(&irq_res, 0, sizeof(irq_res));
|
|
|
|
irq = platform_get_irq_optional(ofdev, 0);
|
|
if (irq < 0 && irq != -ENXIO)
|
|
return irq;
|
|
if (irq > 0) {
|
|
irq_res.start = irq;
|
|
irq_res.end = irq;
|
|
}
|
|
|
|
of_property_read_u32(dn, "reg-shift", ®_shift);
|
|
|
|
if (!of_property_read_u32(dn, "pio-mode", &pio_mode)) {
|
|
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");
|
|
}
|
|
|
|
use16bit = of_property_read_bool(dn, "ata-generic,use16bit");
|
|
|
|
pio_mask = 1 << pio_mode;
|
|
pio_mask |= (1 << pio_mode) - 1;
|
|
|
|
return __pata_platform_probe(&ofdev->dev, &io_res, &ctl_res, irq > 0 ? &irq_res : NULL,
|
|
reg_shift, pio_mask, &pata_platform_sht,
|
|
use16bit);
|
|
}
|
|
|
|
static const struct of_device_id pata_of_platform_match[] = {
|
|
{ .compatible = "ata-generic", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, pata_of_platform_match);
|
|
|
|
static struct platform_driver pata_of_platform_driver = {
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = pata_of_platform_match,
|
|
},
|
|
.probe = pata_of_platform_probe,
|
|
.remove = ata_platform_remove_one,
|
|
};
|
|
|
|
module_platform_driver(pata_of_platform_driver);
|
|
|
|
MODULE_DESCRIPTION("OF-platform PATA driver");
|
|
MODULE_AUTHOR("Anton Vorontsov <avorontsov@ru.mvista.com>");
|
|
MODULE_LICENSE("GPL");
|