127 lines
3.0 KiB
C
127 lines
3.0 KiB
C
|
/*
|
||
|
|
* OpenCores Keyboard Controller Driver
|
||
|
|
* http://www.opencores.org/project,keyboardcontroller
|
||
|
|
*
|
||
|
|
* Copyright 2007-2009 HV Sistemas S.L.
|
||
|
|
*
|
||
|
|
* Licensed under the GPL-2 or later.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/input.h>
|
||
|
|
#include <linux/interrupt.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <linux/ioport.h>
|
||
|
|
#include <linux/kernel.h>
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <linux/platform_device.h>
|
||
|
|
#include <linux/slab.h>
|
||
|
|
|
||
|
|
struct opencores_kbd {
|
||
|
|
struct input_dev *input;
|
||
|
|
void __iomem *addr;
|
||
|
|
int irq;
|
||
|
|
unsigned short keycodes[128];
|
||
|
|
};
|
||
|
|
|
||
|
|
static irqreturn_t opencores_kbd_isr(int irq, void *dev_id)
|
||
|
|
{
|
||
|
|
struct opencores_kbd *opencores_kbd = dev_id;
|
||
|
|
struct input_dev *input = opencores_kbd->input;
|
||
|
|
unsigned char c;
|
||
|
|
|
||
|
|
c = readb(opencores_kbd->addr);
|
||
|
|
input_report_key(input, c & 0x7f, c & 0x80 ? 0 : 1);
|
||
|
|
input_sync(input);
|
||
|
|
|
||
|
|
return IRQ_HANDLED;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int opencores_kbd_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
struct input_dev *input;
|
||
|
|
struct opencores_kbd *opencores_kbd;
|
||
|
|
struct resource *res;
|
||
|
|
int irq, i, error;
|
||
|
|
|
||
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||
|
|
if (!res) {
|
||
|
|
dev_err(&pdev->dev, "missing board memory resource\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
irq = platform_get_irq(pdev, 0);
|
||
|
|
if (irq < 0) {
|
||
|
|
dev_err(&pdev->dev, "missing board IRQ resource\n");
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
opencores_kbd = devm_kzalloc(&pdev->dev, sizeof(*opencores_kbd),
|
||
|
|
GFP_KERNEL);
|
||
|
|
if (!opencores_kbd)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
input = devm_input_allocate_device(&pdev->dev);
|
||
|
|
if (!input) {
|
||
|
|
dev_err(&pdev->dev, "failed to allocate input device\n");
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
opencores_kbd->input = input;
|
||
|
|
|
||
|
|
opencores_kbd->addr = devm_ioremap_resource(&pdev->dev, res);
|
||
|
|
if (IS_ERR(opencores_kbd->addr))
|
||
|
|
return PTR_ERR(opencores_kbd->addr);
|
||
|
|
|
||
|
|
input->name = pdev->name;
|
||
|
|
input->phys = "opencores-kbd/input0";
|
||
|
|
|
||
|
|
input->id.bustype = BUS_HOST;
|
||
|
|
input->id.vendor = 0x0001;
|
||
|
|
input->id.product = 0x0001;
|
||
|
|
input->id.version = 0x0100;
|
||
|
|
|
||
|
|
input->keycode = opencores_kbd->keycodes;
|
||
|
|
input->keycodesize = sizeof(opencores_kbd->keycodes[0]);
|
||
|
|
input->keycodemax = ARRAY_SIZE(opencores_kbd->keycodes);
|
||
|
|
|
||
|
|
__set_bit(EV_KEY, input->evbit);
|
||
|
|
|
||
|
|
for (i = 0; i < ARRAY_SIZE(opencores_kbd->keycodes); i++) {
|
||
|
|
/*
|
||
|
|
* OpenCores controller happens to have scancodes match
|
||
|
|
* our KEY_* definitions.
|
||
|
|
*/
|
||
|
|
opencores_kbd->keycodes[i] = i;
|
||
|
|
__set_bit(opencores_kbd->keycodes[i], input->keybit);
|
||
|
|
}
|
||
|
|
__clear_bit(KEY_RESERVED, input->keybit);
|
||
|
|
|
||
|
|
error = devm_request_irq(&pdev->dev, irq, &opencores_kbd_isr,
|
||
|
|
IRQF_TRIGGER_RISING,
|
||
|
|
pdev->name, opencores_kbd);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&pdev->dev, "unable to claim irq %d\n", irq);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
error = input_register_device(input);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&pdev->dev, "unable to register input device\n");
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver opencores_kbd_device_driver = {
|
||
|
|
.probe = opencores_kbd_probe,
|
||
|
|
.driver = {
|
||
|
|
.name = "opencores-kbd",
|
||
|
|
},
|
||
|
|
};
|
||
|
|
module_platform_driver(opencores_kbd_device_driver);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_AUTHOR("Javier Herrero <jherrero@hvsistemas.es>");
|
||
|
|
MODULE_DESCRIPTION("Keyboard driver for OpenCores Keyboard Controller");
|