mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
1a59d1b8e0
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
157 lines
3.3 KiB
C
157 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2000-2001 Vojtech Pavlik
|
|
* Copyright (c) 2002 Russell King
|
|
*/
|
|
|
|
/*
|
|
* Acorn RiscPC PS/2 keyboard controller driver for Linux/ARM
|
|
*/
|
|
|
|
/*
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/serio.h>
|
|
#include <linux/err.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <asm/hardware/iomd.h>
|
|
|
|
MODULE_AUTHOR("Vojtech Pavlik, Russell King");
|
|
MODULE_DESCRIPTION("Acorn RiscPC PS/2 keyboard controller driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:kart");
|
|
|
|
struct rpckbd_data {
|
|
int tx_irq;
|
|
int rx_irq;
|
|
};
|
|
|
|
static int rpckbd_write(struct serio *port, unsigned char val)
|
|
{
|
|
while (!(iomd_readb(IOMD_KCTRL) & (1 << 7)))
|
|
cpu_relax();
|
|
|
|
iomd_writeb(val, IOMD_KARTTX);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t rpckbd_rx(int irq, void *dev_id)
|
|
{
|
|
struct serio *port = dev_id;
|
|
unsigned int byte;
|
|
int handled = IRQ_NONE;
|
|
|
|
while (iomd_readb(IOMD_KCTRL) & (1 << 5)) {
|
|
byte = iomd_readb(IOMD_KARTRX);
|
|
|
|
serio_interrupt(port, byte, 0);
|
|
handled = IRQ_HANDLED;
|
|
}
|
|
return handled;
|
|
}
|
|
|
|
static irqreturn_t rpckbd_tx(int irq, void *dev_id)
|
|
{
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int rpckbd_open(struct serio *port)
|
|
{
|
|
struct rpckbd_data *rpckbd = port->port_data;
|
|
|
|
/* Reset the keyboard state machine. */
|
|
iomd_writeb(0, IOMD_KCTRL);
|
|
iomd_writeb(8, IOMD_KCTRL);
|
|
iomd_readb(IOMD_KARTRX);
|
|
|
|
if (request_irq(rpckbd->rx_irq, rpckbd_rx, 0, "rpckbd", port) != 0) {
|
|
printk(KERN_ERR "rpckbd.c: Could not allocate keyboard receive IRQ\n");
|
|
return -EBUSY;
|
|
}
|
|
|
|
if (request_irq(rpckbd->tx_irq, rpckbd_tx, 0, "rpckbd", port) != 0) {
|
|
printk(KERN_ERR "rpckbd.c: Could not allocate keyboard transmit IRQ\n");
|
|
free_irq(rpckbd->rx_irq, port);
|
|
return -EBUSY;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rpckbd_close(struct serio *port)
|
|
{
|
|
struct rpckbd_data *rpckbd = port->port_data;
|
|
|
|
free_irq(rpckbd->rx_irq, port);
|
|
free_irq(rpckbd->tx_irq, port);
|
|
}
|
|
|
|
/*
|
|
* Allocate and initialize serio structure for subsequent registration
|
|
* with serio core.
|
|
*/
|
|
static int rpckbd_probe(struct platform_device *dev)
|
|
{
|
|
struct rpckbd_data *rpckbd;
|
|
struct serio *serio;
|
|
int tx_irq, rx_irq;
|
|
|
|
rx_irq = platform_get_irq(dev, 0);
|
|
if (rx_irq <= 0)
|
|
return rx_irq < 0 ? rx_irq : -ENXIO;
|
|
|
|
tx_irq = platform_get_irq(dev, 1);
|
|
if (tx_irq <= 0)
|
|
return tx_irq < 0 ? tx_irq : -ENXIO;
|
|
|
|
serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
|
|
rpckbd = kzalloc(sizeof(*rpckbd), GFP_KERNEL);
|
|
if (!serio || !rpckbd) {
|
|
kfree(rpckbd);
|
|
kfree(serio);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rpckbd->rx_irq = rx_irq;
|
|
rpckbd->tx_irq = tx_irq;
|
|
|
|
serio->id.type = SERIO_8042;
|
|
serio->write = rpckbd_write;
|
|
serio->open = rpckbd_open;
|
|
serio->close = rpckbd_close;
|
|
serio->dev.parent = &dev->dev;
|
|
serio->port_data = rpckbd;
|
|
strlcpy(serio->name, "RiscPC PS/2 kbd port", sizeof(serio->name));
|
|
strlcpy(serio->phys, "rpckbd/serio0", sizeof(serio->phys));
|
|
|
|
platform_set_drvdata(dev, serio);
|
|
serio_register_port(serio);
|
|
return 0;
|
|
}
|
|
|
|
static int rpckbd_remove(struct platform_device *dev)
|
|
{
|
|
struct serio *serio = platform_get_drvdata(dev);
|
|
struct rpckbd_data *rpckbd = serio->port_data;
|
|
|
|
serio_unregister_port(serio);
|
|
kfree(rpckbd);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver rpckbd_driver = {
|
|
.probe = rpckbd_probe,
|
|
.remove = rpckbd_remove,
|
|
.driver = {
|
|
.name = "kart",
|
|
},
|
|
};
|
|
module_platform_driver(rpckbd_driver);
|