mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
177 lines
3.7 KiB
177 lines
3.7 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* Copyright (c) 2000-2001 Vojtech Pavlik |
|
* |
|
* Based on the work of: |
|
* Richard Zidlicky <[email protected]> |
|
*/ |
|
|
|
/* |
|
* Q40 PS/2 keyboard controller driver for Linux/m68k |
|
*/ |
|
|
|
/* |
|
*/ |
|
|
|
#include <linux/module.h> |
|
#include <linux/serio.h> |
|
#include <linux/interrupt.h> |
|
#include <linux/err.h> |
|
#include <linux/bitops.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/slab.h> |
|
|
|
#include <asm/io.h> |
|
#include <linux/uaccess.h> |
|
#include <asm/q40_master.h> |
|
#include <asm/irq.h> |
|
#include <asm/q40ints.h> |
|
|
|
#define DRV_NAME "q40kbd" |
|
|
|
MODULE_AUTHOR("Vojtech Pavlik <[email protected]>"); |
|
MODULE_DESCRIPTION("Q40 PS/2 keyboard controller driver"); |
|
MODULE_LICENSE("GPL"); |
|
MODULE_ALIAS("platform:" DRV_NAME); |
|
|
|
struct q40kbd { |
|
struct serio *port; |
|
spinlock_t lock; |
|
}; |
|
|
|
static irqreturn_t q40kbd_interrupt(int irq, void *dev_id) |
|
{ |
|
struct q40kbd *q40kbd = dev_id; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&q40kbd->lock, flags); |
|
|
|
if (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG)) |
|
serio_interrupt(q40kbd->port, master_inb(KEYCODE_REG), 0); |
|
|
|
master_outb(-1, KEYBOARD_UNLOCK_REG); |
|
|
|
spin_unlock_irqrestore(&q40kbd->lock, flags); |
|
|
|
return IRQ_HANDLED; |
|
} |
|
|
|
/* |
|
* q40kbd_flush() flushes all data that may be in the keyboard buffers |
|
*/ |
|
|
|
static void q40kbd_flush(struct q40kbd *q40kbd) |
|
{ |
|
int maxread = 100; |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&q40kbd->lock, flags); |
|
|
|
while (maxread-- && (Q40_IRQ_KEYB_MASK & master_inb(INTERRUPT_REG))) |
|
master_inb(KEYCODE_REG); |
|
|
|
spin_unlock_irqrestore(&q40kbd->lock, flags); |
|
} |
|
|
|
static void q40kbd_stop(void) |
|
{ |
|
master_outb(0, KEY_IRQ_ENABLE_REG); |
|
master_outb(-1, KEYBOARD_UNLOCK_REG); |
|
} |
|
|
|
/* |
|
* q40kbd_open() is called when a port is open by the higher layer. |
|
* It allocates the interrupt and enables in in the chip. |
|
*/ |
|
|
|
static int q40kbd_open(struct serio *port) |
|
{ |
|
struct q40kbd *q40kbd = port->port_data; |
|
|
|
q40kbd_flush(q40kbd); |
|
|
|
/* off we go */ |
|
master_outb(-1, KEYBOARD_UNLOCK_REG); |
|
master_outb(1, KEY_IRQ_ENABLE_REG); |
|
|
|
return 0; |
|
} |
|
|
|
static void q40kbd_close(struct serio *port) |
|
{ |
|
struct q40kbd *q40kbd = port->port_data; |
|
|
|
q40kbd_stop(); |
|
q40kbd_flush(q40kbd); |
|
} |
|
|
|
static int q40kbd_probe(struct platform_device *pdev) |
|
{ |
|
struct q40kbd *q40kbd; |
|
struct serio *port; |
|
int error; |
|
|
|
q40kbd = kzalloc(sizeof(struct q40kbd), GFP_KERNEL); |
|
port = kzalloc(sizeof(struct serio), GFP_KERNEL); |
|
if (!q40kbd || !port) { |
|
error = -ENOMEM; |
|
goto err_free_mem; |
|
} |
|
|
|
q40kbd->port = port; |
|
spin_lock_init(&q40kbd->lock); |
|
|
|
port->id.type = SERIO_8042; |
|
port->open = q40kbd_open; |
|
port->close = q40kbd_close; |
|
port->port_data = q40kbd; |
|
port->dev.parent = &pdev->dev; |
|
strlcpy(port->name, "Q40 Kbd Port", sizeof(port->name)); |
|
strlcpy(port->phys, "Q40", sizeof(port->phys)); |
|
|
|
q40kbd_stop(); |
|
|
|
error = request_irq(Q40_IRQ_KEYBOARD, q40kbd_interrupt, 0, |
|
DRV_NAME, q40kbd); |
|
if (error) { |
|
dev_err(&pdev->dev, "Can't get irq %d.\n", Q40_IRQ_KEYBOARD); |
|
goto err_free_mem; |
|
} |
|
|
|
serio_register_port(q40kbd->port); |
|
|
|
platform_set_drvdata(pdev, q40kbd); |
|
printk(KERN_INFO "serio: Q40 kbd registered\n"); |
|
|
|
return 0; |
|
|
|
err_free_mem: |
|
kfree(port); |
|
kfree(q40kbd); |
|
return error; |
|
} |
|
|
|
static int q40kbd_remove(struct platform_device *pdev) |
|
{ |
|
struct q40kbd *q40kbd = platform_get_drvdata(pdev); |
|
|
|
/* |
|
* q40kbd_close() will be called as part of unregistering |
|
* and will ensure that IRQ is turned off, so it is safe |
|
* to unregister port first and free IRQ later. |
|
*/ |
|
serio_unregister_port(q40kbd->port); |
|
free_irq(Q40_IRQ_KEYBOARD, q40kbd); |
|
kfree(q40kbd); |
|
|
|
return 0; |
|
} |
|
|
|
static struct platform_driver q40kbd_driver = { |
|
.driver = { |
|
.name = "q40kbd", |
|
}, |
|
.remove = q40kbd_remove, |
|
}; |
|
|
|
module_platform_driver_probe(q40kbd_driver, q40kbd_probe);
|
|
|