mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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179909ecaf
I do not think Vojtech wants snail mail these days (and he mentioned that nobody has ever sent him snail mail), and the address is not even valid anymore, so let's remove snail-mail instructions from the sources. Acked-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
190 lines
4.3 KiB
C
190 lines
4.3 KiB
C
/*
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* Copyright (c) 2000-2001 Vojtech Pavlik
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*
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* Based on the work of:
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* Richard Zidlicky <Richard.Zidlicky@stud.informatik.uni-erlangen.de>
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*/
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/*
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* Q40 PS/2 keyboard controller driver for Linux/m68k
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/module.h>
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#include <linux/serio.h>
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#include <linux/interrupt.h>
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#include <linux/err.h>
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#include <linux/bitops.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <asm/io.h>
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#include <linux/uaccess.h>
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#include <asm/q40_master.h>
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#include <asm/irq.h>
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#include <asm/q40ints.h>
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#define DRV_NAME "q40kbd"
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MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
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MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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struct q40kbd {
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struct serio *port;
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spinlock_t lock;
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};
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static irqreturn_t q40kbd_interrupt(int irq, void *dev_id)
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{
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struct q40kbd *q40kbd = dev_id;
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unsigned long flags;
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spin_lock_irqsave(&q40kbd->lock, flags);
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if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))
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serio_interrupt(q40kbd->port, master_inb(KEYCODE_REG), 0);
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master_outb(-1, KEYBOARD_UNLOCK_REG);
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spin_unlock_irqrestore(&q40kbd->lock, flags);
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return IRQ_HANDLED;
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}
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/*
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* q40kbd_flush() flushes all data that may be in the keyboard buffers
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*/
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static void q40kbd_flush(struct q40kbd *q40kbd)
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{
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int maxread = 100;
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unsigned long flags;
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spin_lock_irqsave(&q40kbd->lock, flags);
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while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)))
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master_inb(KEYCODE_REG);
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spin_unlock_irqrestore(&q40kbd->lock, flags);
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}
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static void q40kbd_stop(void)
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{
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master_outb(0, KEY_IRQ_ENABLE_REG);
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master_outb(-1, KEYBOARD_UNLOCK_REG);
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}
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/*
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* q40kbd_open() is called when a port is open by the higher layer.
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* It allocates the interrupt and enables in in the chip.
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*/
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static int q40kbd_open(struct serio *port)
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{
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struct q40kbd *q40kbd = port->port_data;
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q40kbd_flush(q40kbd);
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/* off we go */
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master_outb(-1, KEYBOARD_UNLOCK_REG);
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master_outb(1, KEY_IRQ_ENABLE_REG);
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return 0;
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}
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static void q40kbd_close(struct serio *port)
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{
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struct q40kbd *q40kbd = port->port_data;
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q40kbd_stop();
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q40kbd_flush(q40kbd);
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}
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static int q40kbd_probe(struct platform_device *pdev)
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{
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struct q40kbd *q40kbd;
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struct serio *port;
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int error;
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q40kbd = kzalloc(sizeof(struct q40kbd), GFP_KERNEL);
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port = kzalloc(sizeof(struct serio), GFP_KERNEL);
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if (!q40kbd || !port) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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q40kbd->port = port;
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spin_lock_init(&q40kbd->lock);
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port->id.type = SERIO_8042;
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port->open = q40kbd_open;
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port->close = q40kbd_close;
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port->port_data = q40kbd;
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port->dev.parent = &pdev->dev;
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strlcpy(port->name, "Q40 Kbd Port", sizeof(port->name));
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strlcpy(port->phys, "Q40", sizeof(port->phys));
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q40kbd_stop();
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error = request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0,
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DRV_NAME, q40kbd);
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if (error) {
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dev_err(&pdev->dev, "Can't get irq %d.\n", Q40_IRQ_KEYBOARD);
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goto err_free_mem;
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}
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serio_register_port(q40kbd->port);
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platform_set_drvdata(pdev, q40kbd);
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printk(KERN_INFO "serio: Q40 kbd registered\n");
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return 0;
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err_free_mem:
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kfree(port);
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kfree(q40kbd);
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return error;
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}
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static int q40kbd_remove(struct platform_device *pdev)
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{
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struct q40kbd *q40kbd = platform_get_drvdata(pdev);
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/*
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* q40kbd_close() will be called as part of unregistering
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* and will ensure that IRQ is turned off, so it is safe
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* to unregister port first and free IRQ later.
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*/
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serio_unregister_port(q40kbd->port);
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free_irq(Q40_IRQ_KEYBOARD, q40kbd);
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kfree(q40kbd);
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return 0;
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}
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static struct platform_driver q40kbd_driver = {
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.driver = {
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.name = "q40kbd",
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},
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.remove = q40kbd_remove,
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};
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module_platform_driver_probe(q40kbd_driver, q40kbd_probe);
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