mirror of
https://github.com/torvalds/linux.git
synced 2026-03-08 05:04:51 +01:00
bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
160 lines
3.5 KiB
C
160 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Altera University Program PS2 controller driver
|
|
*
|
|
* Copyright (C) 2008 Thomas Chou <thomas@wytron.com.tw>
|
|
*
|
|
* Based on sa1111ps2.c, which is:
|
|
* Copyright (C) 2002 Russell King
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/serio.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/of.h>
|
|
|
|
#define DRV_NAME "altera_ps2"
|
|
|
|
struct ps2if {
|
|
struct serio *io;
|
|
void __iomem *base;
|
|
};
|
|
|
|
/*
|
|
* Read all bytes waiting in the PS2 port. There should be
|
|
* at the most one, but we loop for safety.
|
|
*/
|
|
static irqreturn_t altera_ps2_rxint(int irq, void *dev_id)
|
|
{
|
|
struct ps2if *ps2if = dev_id;
|
|
unsigned int status;
|
|
irqreturn_t handled = IRQ_NONE;
|
|
|
|
while ((status = readl(ps2if->base)) & 0xffff0000) {
|
|
serio_interrupt(ps2if->io, status & 0xff, 0);
|
|
handled = IRQ_HANDLED;
|
|
}
|
|
|
|
return handled;
|
|
}
|
|
|
|
/*
|
|
* Write a byte to the PS2 port.
|
|
*/
|
|
static int altera_ps2_write(struct serio *io, unsigned char val)
|
|
{
|
|
struct ps2if *ps2if = io->port_data;
|
|
|
|
writel(val, ps2if->base);
|
|
return 0;
|
|
}
|
|
|
|
static int altera_ps2_open(struct serio *io)
|
|
{
|
|
struct ps2if *ps2if = io->port_data;
|
|
|
|
/* clear fifo */
|
|
while (readl(ps2if->base) & 0xffff0000)
|
|
/* empty */;
|
|
|
|
writel(1, ps2if->base + 4); /* enable rx irq */
|
|
return 0;
|
|
}
|
|
|
|
static void altera_ps2_close(struct serio *io)
|
|
{
|
|
struct ps2if *ps2if = io->port_data;
|
|
|
|
writel(0, ps2if->base + 4); /* disable rx irq */
|
|
}
|
|
|
|
/*
|
|
* Add one device to this driver.
|
|
*/
|
|
static int altera_ps2_probe(struct platform_device *pdev)
|
|
{
|
|
struct ps2if *ps2if;
|
|
struct serio *serio;
|
|
int error, irq;
|
|
|
|
ps2if = devm_kzalloc(&pdev->dev, sizeof(*ps2if), GFP_KERNEL);
|
|
if (!ps2if)
|
|
return -ENOMEM;
|
|
|
|
ps2if->base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
|
|
if (IS_ERR(ps2if->base))
|
|
return PTR_ERR(ps2if->base);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return -ENXIO;
|
|
|
|
error = devm_request_irq(&pdev->dev, irq, altera_ps2_rxint, 0,
|
|
pdev->name, ps2if);
|
|
if (error) {
|
|
dev_err(&pdev->dev, "could not request IRQ %d\n", irq);
|
|
return error;
|
|
}
|
|
|
|
serio = kzalloc_obj(*serio);
|
|
if (!serio)
|
|
return -ENOMEM;
|
|
|
|
serio->id.type = SERIO_8042;
|
|
serio->write = altera_ps2_write;
|
|
serio->open = altera_ps2_open;
|
|
serio->close = altera_ps2_close;
|
|
strscpy(serio->name, dev_name(&pdev->dev), sizeof(serio->name));
|
|
strscpy(serio->phys, dev_name(&pdev->dev), sizeof(serio->phys));
|
|
serio->port_data = ps2if;
|
|
serio->dev.parent = &pdev->dev;
|
|
ps2if->io = serio;
|
|
|
|
dev_info(&pdev->dev, "base %p, irq %d\n", ps2if->base, irq);
|
|
|
|
serio_register_port(ps2if->io);
|
|
platform_set_drvdata(pdev, ps2if);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove one device from this driver.
|
|
*/
|
|
static void altera_ps2_remove(struct platform_device *pdev)
|
|
{
|
|
struct ps2if *ps2if = platform_get_drvdata(pdev);
|
|
|
|
serio_unregister_port(ps2if->io);
|
|
}
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id altera_ps2_match[] = {
|
|
{ .compatible = "ALTR,ps2-1.0", },
|
|
{ .compatible = "altr,ps2-1.0", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, altera_ps2_match);
|
|
#endif /* CONFIG_OF */
|
|
|
|
/*
|
|
* Our device driver structure
|
|
*/
|
|
static struct platform_driver altera_ps2_driver = {
|
|
.probe = altera_ps2_probe,
|
|
.remove = altera_ps2_remove,
|
|
.driver = {
|
|
.name = DRV_NAME,
|
|
.of_match_table = of_match_ptr(altera_ps2_match),
|
|
},
|
|
};
|
|
module_platform_driver(altera_ps2_driver);
|
|
|
|
MODULE_DESCRIPTION("Altera University Program PS2 controller driver");
|
|
MODULE_AUTHOR("Thomas Chou <thomas@wytron.com.tw>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:" DRV_NAME);
|