mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-21 01:54:51 +08:00
840a746be2
Commit 940ab88962
introduced a new macro to
save some platform_driver boilerplate code. Use it.
Signed-off-by: JJ Ding <dgdunix@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
273 lines
6.1 KiB
C
273 lines
6.1 KiB
C
/*
|
|
* Rotary counter driver for Analog Devices Blackfin Processors
|
|
*
|
|
* Copyright 2008-2009 Analog Devices Inc.
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/input.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include <asm/portmux.h>
|
|
#include <asm/bfin_rotary.h>
|
|
|
|
static const u16 per_cnt[] = {
|
|
P_CNT_CUD,
|
|
P_CNT_CDG,
|
|
P_CNT_CZM,
|
|
0
|
|
};
|
|
|
|
struct bfin_rot {
|
|
struct input_dev *input;
|
|
int irq;
|
|
unsigned int up_key;
|
|
unsigned int down_key;
|
|
unsigned int button_key;
|
|
unsigned int rel_code;
|
|
unsigned short cnt_config;
|
|
unsigned short cnt_imask;
|
|
unsigned short cnt_debounce;
|
|
};
|
|
|
|
static void report_key_event(struct input_dev *input, int keycode)
|
|
{
|
|
/* simulate a press-n-release */
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
static void report_rotary_event(struct bfin_rot *rotary, int delta)
|
|
{
|
|
struct input_dev *input = rotary->input;
|
|
|
|
if (rotary->up_key) {
|
|
report_key_event(input,
|
|
delta > 0 ? rotary->up_key : rotary->down_key);
|
|
} else {
|
|
input_report_rel(input, rotary->rel_code, delta);
|
|
input_sync(input);
|
|
}
|
|
}
|
|
|
|
static irqreturn_t bfin_rotary_isr(int irq, void *dev_id)
|
|
{
|
|
struct platform_device *pdev = dev_id;
|
|
struct bfin_rot *rotary = platform_get_drvdata(pdev);
|
|
int delta;
|
|
|
|
switch (bfin_read_CNT_STATUS()) {
|
|
|
|
case ICII:
|
|
break;
|
|
|
|
case UCII:
|
|
case DCII:
|
|
delta = bfin_read_CNT_COUNTER();
|
|
if (delta)
|
|
report_rotary_event(rotary, delta);
|
|
break;
|
|
|
|
case CZMII:
|
|
report_key_event(rotary->input, rotary->button_key);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
bfin_write_CNT_COMMAND(W1LCNT_ZERO); /* Clear COUNTER */
|
|
bfin_write_CNT_STATUS(-1); /* Clear STATUS */
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static int __devinit bfin_rotary_probe(struct platform_device *pdev)
|
|
{
|
|
struct bfin_rotary_platform_data *pdata = pdev->dev.platform_data;
|
|
struct bfin_rot *rotary;
|
|
struct input_dev *input;
|
|
int error;
|
|
|
|
/* Basic validation */
|
|
if ((pdata->rotary_up_key && !pdata->rotary_down_key) ||
|
|
(!pdata->rotary_up_key && pdata->rotary_down_key)) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = peripheral_request_list(per_cnt, dev_name(&pdev->dev));
|
|
if (error) {
|
|
dev_err(&pdev->dev, "requesting peripherals failed\n");
|
|
return error;
|
|
}
|
|
|
|
rotary = kzalloc(sizeof(struct bfin_rot), GFP_KERNEL);
|
|
input = input_allocate_device();
|
|
if (!rotary || !input) {
|
|
error = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
rotary->input = input;
|
|
|
|
rotary->up_key = pdata->rotary_up_key;
|
|
rotary->down_key = pdata->rotary_down_key;
|
|
rotary->button_key = pdata->rotary_button_key;
|
|
rotary->rel_code = pdata->rotary_rel_code;
|
|
|
|
error = rotary->irq = platform_get_irq(pdev, 0);
|
|
if (error < 0)
|
|
goto out1;
|
|
|
|
input->name = pdev->name;
|
|
input->phys = "bfin-rotary/input0";
|
|
input->dev.parent = &pdev->dev;
|
|
|
|
input_set_drvdata(input, rotary);
|
|
|
|
input->id.bustype = BUS_HOST;
|
|
input->id.vendor = 0x0001;
|
|
input->id.product = 0x0001;
|
|
input->id.version = 0x0100;
|
|
|
|
if (rotary->up_key) {
|
|
__set_bit(EV_KEY, input->evbit);
|
|
__set_bit(rotary->up_key, input->keybit);
|
|
__set_bit(rotary->down_key, input->keybit);
|
|
} else {
|
|
__set_bit(EV_REL, input->evbit);
|
|
__set_bit(rotary->rel_code, input->relbit);
|
|
}
|
|
|
|
if (rotary->button_key) {
|
|
__set_bit(EV_KEY, input->evbit);
|
|
__set_bit(rotary->button_key, input->keybit);
|
|
}
|
|
|
|
error = request_irq(rotary->irq, bfin_rotary_isr,
|
|
0, dev_name(&pdev->dev), pdev);
|
|
if (error) {
|
|
dev_err(&pdev->dev,
|
|
"unable to claim irq %d; error %d\n",
|
|
rotary->irq, error);
|
|
goto out1;
|
|
}
|
|
|
|
error = input_register_device(input);
|
|
if (error) {
|
|
dev_err(&pdev->dev,
|
|
"unable to register input device (%d)\n", error);
|
|
goto out2;
|
|
}
|
|
|
|
if (pdata->rotary_button_key)
|
|
bfin_write_CNT_IMASK(CZMIE);
|
|
|
|
if (pdata->mode & ROT_DEBE)
|
|
bfin_write_CNT_DEBOUNCE(pdata->debounce & DPRESCALE);
|
|
|
|
if (pdata->mode)
|
|
bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() |
|
|
(pdata->mode & ~CNTE));
|
|
|
|
bfin_write_CNT_IMASK(bfin_read_CNT_IMASK() | UCIE | DCIE);
|
|
bfin_write_CNT_CONFIG(bfin_read_CNT_CONFIG() | CNTE);
|
|
|
|
platform_set_drvdata(pdev, rotary);
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
|
|
return 0;
|
|
|
|
out2:
|
|
free_irq(rotary->irq, pdev);
|
|
out1:
|
|
input_free_device(input);
|
|
kfree(rotary);
|
|
peripheral_free_list(per_cnt);
|
|
|
|
return error;
|
|
}
|
|
|
|
static int __devexit bfin_rotary_remove(struct platform_device *pdev)
|
|
{
|
|
struct bfin_rot *rotary = platform_get_drvdata(pdev);
|
|
|
|
bfin_write_CNT_CONFIG(0);
|
|
bfin_write_CNT_IMASK(0);
|
|
|
|
free_irq(rotary->irq, pdev);
|
|
input_unregister_device(rotary->input);
|
|
peripheral_free_list(per_cnt);
|
|
|
|
kfree(rotary);
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int bfin_rotary_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct bfin_rot *rotary = platform_get_drvdata(pdev);
|
|
|
|
rotary->cnt_config = bfin_read_CNT_CONFIG();
|
|
rotary->cnt_imask = bfin_read_CNT_IMASK();
|
|
rotary->cnt_debounce = bfin_read_CNT_DEBOUNCE();
|
|
|
|
if (device_may_wakeup(&pdev->dev))
|
|
enable_irq_wake(rotary->irq);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int bfin_rotary_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct bfin_rot *rotary = platform_get_drvdata(pdev);
|
|
|
|
bfin_write_CNT_DEBOUNCE(rotary->cnt_debounce);
|
|
bfin_write_CNT_IMASK(rotary->cnt_imask);
|
|
bfin_write_CNT_CONFIG(rotary->cnt_config & ~CNTE);
|
|
|
|
if (device_may_wakeup(&pdev->dev))
|
|
disable_irq_wake(rotary->irq);
|
|
|
|
if (rotary->cnt_config & CNTE)
|
|
bfin_write_CNT_CONFIG(rotary->cnt_config);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops bfin_rotary_pm_ops = {
|
|
.suspend = bfin_rotary_suspend,
|
|
.resume = bfin_rotary_resume,
|
|
};
|
|
#endif
|
|
|
|
static struct platform_driver bfin_rotary_device_driver = {
|
|
.probe = bfin_rotary_probe,
|
|
.remove = __devexit_p(bfin_rotary_remove),
|
|
.driver = {
|
|
.name = "bfin-rotary",
|
|
.owner = THIS_MODULE,
|
|
#ifdef CONFIG_PM
|
|
.pm = &bfin_rotary_pm_ops,
|
|
#endif
|
|
},
|
|
};
|
|
module_platform_driver(bfin_rotary_device_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
|
|
MODULE_DESCRIPTION("Rotary Counter driver for Blackfin Processors");
|
|
MODULE_ALIAS("platform:bfin-rotary");
|