mirror of https://gitee.com/openkylin/linux.git
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Platform IDE driver
|
|
*
|
|
* Copyright (C) 2007 MontaVista Software
|
|
*
|
|
* Maintainer: Kumar Gala <galak@kernel.crashing.org>
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/ide.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ata_platform.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/io.h>
|
|
|
|
static void plat_ide_setup_ports(struct ide_hw *hw, void __iomem *base,
|
|
void __iomem *ctrl,
|
|
struct pata_platform_info *pdata, int irq)
|
|
{
|
|
unsigned long port = (unsigned long)base;
|
|
int i;
|
|
|
|
hw->io_ports.data_addr = port;
|
|
|
|
port += (1 << pdata->ioport_shift);
|
|
for (i = 1; i <= 7;
|
|
i++, port += (1 << pdata->ioport_shift))
|
|
hw->io_ports_array[i] = port;
|
|
|
|
hw->io_ports.ctl_addr = (unsigned long)ctrl;
|
|
|
|
hw->irq = irq;
|
|
}
|
|
|
|
static const struct ide_port_info platform_ide_port_info = {
|
|
.host_flags = IDE_HFLAG_NO_DMA,
|
|
.chipset = ide_generic,
|
|
};
|
|
|
|
static int plat_ide_probe(struct platform_device *pdev)
|
|
{
|
|
struct resource *res_base, *res_alt, *res_irq;
|
|
void __iomem *base, *alt_base;
|
|
struct pata_platform_info *pdata;
|
|
struct ide_host *host;
|
|
int ret = 0, mmio = 0;
|
|
struct ide_hw hw, *hws[] = { &hw };
|
|
struct ide_port_info d = platform_ide_port_info;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
/* get a pointer to the register memory */
|
|
res_base = platform_get_resource(pdev, IORESOURCE_IO, 0);
|
|
res_alt = platform_get_resource(pdev, IORESOURCE_IO, 1);
|
|
|
|
if (!res_base || !res_alt) {
|
|
res_base = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
res_alt = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!res_base || !res_alt) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
mmio = 1;
|
|
}
|
|
|
|
res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
|
|
if (!res_irq) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (mmio) {
|
|
base = devm_ioremap(&pdev->dev,
|
|
res_base->start, resource_size(res_base));
|
|
alt_base = devm_ioremap(&pdev->dev,
|
|
res_alt->start, resource_size(res_alt));
|
|
} else {
|
|
base = devm_ioport_map(&pdev->dev,
|
|
res_base->start, resource_size(res_base));
|
|
alt_base = devm_ioport_map(&pdev->dev,
|
|
res_alt->start, resource_size(res_alt));
|
|
}
|
|
|
|
memset(&hw, 0, sizeof(hw));
|
|
plat_ide_setup_ports(&hw, base, alt_base, pdata, res_irq->start);
|
|
hw.dev = &pdev->dev;
|
|
|
|
d.irq_flags = res_irq->flags & IRQF_TRIGGER_MASK;
|
|
if (res_irq->flags & IORESOURCE_IRQ_SHAREABLE)
|
|
d.irq_flags |= IRQF_SHARED;
|
|
|
|
if (mmio)
|
|
d.host_flags |= IDE_HFLAG_MMIO;
|
|
|
|
ret = ide_host_add(&d, hws, 1, &host);
|
|
if (ret)
|
|
goto out;
|
|
|
|
platform_set_drvdata(pdev, host);
|
|
|
|
return 0;
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int plat_ide_remove(struct platform_device *pdev)
|
|
{
|
|
struct ide_host *host = dev_get_drvdata(&pdev->dev);
|
|
|
|
ide_host_remove(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver platform_ide_driver = {
|
|
.driver = {
|
|
.name = "pata_platform",
|
|
},
|
|
.probe = plat_ide_probe,
|
|
.remove = plat_ide_remove,
|
|
};
|
|
|
|
module_platform_driver(platform_ide_driver);
|
|
|
|
MODULE_DESCRIPTION("Platform IDE driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:pata_platform");
|