mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Dmitry Torokhov](/assets/img/avatar_default.png)
We have added polled mode to the normal input devices with the intent of retiring input_polled_dev. This converts apanel driver to use the polling mode of standard input devices and removes dependency on INPUT_POLLDEV. While at it, let's convert the driver to use devm. Link: https://lore.kernel.org/r/20191017204217.106453-10-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
305 lines
7 KiB
C
305 lines
7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Fujitsu Lifebook Application Panel button drive
|
|
*
|
|
* Copyright (C) 2007 Stephen Hemminger <shemminger@linux-foundation.org>
|
|
* Copyright (C) 2001-2003 Jochen Eisinger <jochen@penguin-breeder.org>
|
|
*
|
|
* Many Fujitsu Lifebook laptops have a small panel of buttons that are
|
|
* accessible via the i2c/smbus interface. This driver polls those
|
|
* buttons and generates input events.
|
|
*
|
|
* For more details see:
|
|
* http://apanel.sourceforge.net/tech.php
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/io.h>
|
|
#include <linux/input.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/leds.h>
|
|
|
|
#define APANEL_NAME "Fujitsu Application Panel"
|
|
#define APANEL "apanel"
|
|
|
|
/* How often we poll keys - msecs */
|
|
#define POLL_INTERVAL_DEFAULT 1000
|
|
|
|
/* Magic constants in BIOS that tell about buttons */
|
|
enum apanel_devid {
|
|
APANEL_DEV_NONE = 0,
|
|
APANEL_DEV_APPBTN = 1,
|
|
APANEL_DEV_CDBTN = 2,
|
|
APANEL_DEV_LCD = 3,
|
|
APANEL_DEV_LED = 4,
|
|
|
|
APANEL_DEV_MAX,
|
|
};
|
|
|
|
enum apanel_chip {
|
|
CHIP_NONE = 0,
|
|
CHIP_OZ992C = 1,
|
|
CHIP_OZ163T = 2,
|
|
CHIP_OZ711M3 = 4,
|
|
};
|
|
|
|
/* Result of BIOS snooping/probing -- what features are supported */
|
|
static enum apanel_chip device_chip[APANEL_DEV_MAX];
|
|
|
|
#define MAX_PANEL_KEYS 12
|
|
|
|
struct apanel {
|
|
struct input_dev *idev;
|
|
struct i2c_client *client;
|
|
unsigned short keymap[MAX_PANEL_KEYS];
|
|
u16 nkeys;
|
|
struct led_classdev mail_led;
|
|
};
|
|
|
|
static const unsigned short apanel_keymap[MAX_PANEL_KEYS] = {
|
|
[0] = KEY_MAIL,
|
|
[1] = KEY_WWW,
|
|
[2] = KEY_PROG2,
|
|
[3] = KEY_PROG1,
|
|
|
|
[8] = KEY_FORWARD,
|
|
[9] = KEY_REWIND,
|
|
[10] = KEY_STOPCD,
|
|
[11] = KEY_PLAYPAUSE,
|
|
};
|
|
|
|
static void report_key(struct input_dev *input, unsigned keycode)
|
|
{
|
|
dev_dbg(input->dev.parent, "report key %#x\n", keycode);
|
|
input_report_key(input, keycode, 1);
|
|
input_sync(input);
|
|
|
|
input_report_key(input, keycode, 0);
|
|
input_sync(input);
|
|
}
|
|
|
|
/* Poll for key changes
|
|
*
|
|
* Read Application keys via SMI
|
|
* A (0x4), B (0x8), Internet (0x2), Email (0x1).
|
|
*
|
|
* CD keys:
|
|
* Forward (0x100), Rewind (0x200), Stop (0x400), Pause (0x800)
|
|
*/
|
|
static void apanel_poll(struct input_dev *idev)
|
|
{
|
|
struct apanel *ap = input_get_drvdata(idev);
|
|
u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
|
|
s32 data;
|
|
int i;
|
|
|
|
data = i2c_smbus_read_word_data(ap->client, cmd);
|
|
if (data < 0)
|
|
return; /* ignore errors (due to ACPI??) */
|
|
|
|
/* write back to clear latch */
|
|
i2c_smbus_write_word_data(ap->client, cmd, 0);
|
|
|
|
if (!data)
|
|
return;
|
|
|
|
dev_dbg(&idev->dev, APANEL ": data %#x\n", data);
|
|
for (i = 0; i < idev->keycodemax; i++)
|
|
if ((1u << i) & data)
|
|
report_key(idev, ap->keymap[i]);
|
|
}
|
|
|
|
static int mail_led_set(struct led_classdev *led,
|
|
enum led_brightness value)
|
|
{
|
|
struct apanel *ap = container_of(led, struct apanel, mail_led);
|
|
u16 led_bits = value != LED_OFF ? 0x8000 : 0x0000;
|
|
|
|
return i2c_smbus_write_word_data(ap->client, 0x10, led_bits);
|
|
}
|
|
|
|
static int apanel_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct apanel *ap;
|
|
struct input_dev *idev;
|
|
u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8;
|
|
int i, err;
|
|
|
|
ap = devm_kzalloc(&client->dev, sizeof(*ap), GFP_KERNEL);
|
|
if (!ap)
|
|
return -ENOMEM;
|
|
|
|
idev = devm_input_allocate_device(&client->dev);
|
|
if (!idev)
|
|
return -ENOMEM;
|
|
|
|
ap->idev = idev;
|
|
ap->client = client;
|
|
|
|
i2c_set_clientdata(client, ap);
|
|
|
|
err = i2c_smbus_write_word_data(client, cmd, 0);
|
|
if (err) {
|
|
dev_warn(&client->dev, "smbus write error %d\n", err);
|
|
return err;
|
|
}
|
|
|
|
input_set_drvdata(idev, ap);
|
|
|
|
idev->name = APANEL_NAME " buttons";
|
|
idev->phys = "apanel/input0";
|
|
idev->id.bustype = BUS_HOST;
|
|
|
|
memcpy(ap->keymap, apanel_keymap, sizeof(apanel_keymap));
|
|
idev->keycode = ap->keymap;
|
|
idev->keycodesize = sizeof(ap->keymap[0]);
|
|
idev->keycodemax = (device_chip[APANEL_DEV_CDBTN] != CHIP_NONE) ? 12 : 4;
|
|
|
|
set_bit(EV_KEY, idev->evbit);
|
|
for (i = 0; i < idev->keycodemax; i++)
|
|
if (ap->keymap[i])
|
|
set_bit(ap->keymap[i], idev->keybit);
|
|
|
|
err = input_setup_polling(idev, apanel_poll);
|
|
if (err)
|
|
return err;
|
|
|
|
input_set_poll_interval(idev, POLL_INTERVAL_DEFAULT);
|
|
|
|
err = input_register_device(idev);
|
|
if (err)
|
|
return err;
|
|
|
|
if (device_chip[APANEL_DEV_LED] != CHIP_NONE) {
|
|
ap->mail_led.name = "mail:blue";
|
|
ap->mail_led.brightness_set_blocking = mail_led_set;
|
|
err = devm_led_classdev_register(&client->dev, &ap->mail_led);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void apanel_shutdown(struct i2c_client *client)
|
|
{
|
|
struct apanel *ap = i2c_get_clientdata(client);
|
|
|
|
if (device_chip[APANEL_DEV_LED] != CHIP_NONE)
|
|
led_set_brightness(&ap->mail_led, LED_OFF);
|
|
}
|
|
|
|
static const struct i2c_device_id apanel_id[] = {
|
|
{ "fujitsu_apanel", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, apanel_id);
|
|
|
|
static struct i2c_driver apanel_driver = {
|
|
.driver = {
|
|
.name = APANEL,
|
|
},
|
|
.probe = apanel_probe,
|
|
.shutdown = apanel_shutdown,
|
|
.id_table = apanel_id,
|
|
};
|
|
|
|
/* Scan the system ROM for the signature "FJKEYINF" */
|
|
static __init const void __iomem *bios_signature(const void __iomem *bios)
|
|
{
|
|
ssize_t offset;
|
|
const unsigned char signature[] = "FJKEYINF";
|
|
|
|
for (offset = 0; offset < 0x10000; offset += 0x10) {
|
|
if (check_signature(bios + offset, signature,
|
|
sizeof(signature)-1))
|
|
return bios + offset;
|
|
}
|
|
pr_notice(APANEL ": Fujitsu BIOS signature '%s' not found...\n",
|
|
signature);
|
|
return NULL;
|
|
}
|
|
|
|
static int __init apanel_init(void)
|
|
{
|
|
void __iomem *bios;
|
|
const void __iomem *p;
|
|
u8 devno;
|
|
unsigned char i2c_addr;
|
|
int found = 0;
|
|
|
|
bios = ioremap(0xF0000, 0x10000); /* Can't fail */
|
|
|
|
p = bios_signature(bios);
|
|
if (!p) {
|
|
iounmap(bios);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* just use the first address */
|
|
p += 8;
|
|
i2c_addr = readb(p + 3) >> 1;
|
|
|
|
for ( ; (devno = readb(p)) & 0x7f; p += 4) {
|
|
unsigned char method, slave, chip;
|
|
|
|
method = readb(p + 1);
|
|
chip = readb(p + 2);
|
|
slave = readb(p + 3) >> 1;
|
|
|
|
if (slave != i2c_addr) {
|
|
pr_notice(APANEL ": only one SMBus slave "
|
|
"address supported, skipping device...\n");
|
|
continue;
|
|
}
|
|
|
|
/* translate alternative device numbers */
|
|
switch (devno) {
|
|
case 6:
|
|
devno = APANEL_DEV_APPBTN;
|
|
break;
|
|
case 7:
|
|
devno = APANEL_DEV_LED;
|
|
break;
|
|
}
|
|
|
|
if (devno >= APANEL_DEV_MAX)
|
|
pr_notice(APANEL ": unknown device %u found\n", devno);
|
|
else if (device_chip[devno] != CHIP_NONE)
|
|
pr_warn(APANEL ": duplicate entry for devno %u\n",
|
|
devno);
|
|
|
|
else if (method != 1 && method != 2 && method != 4) {
|
|
pr_notice(APANEL ": unknown method %u for devno %u\n",
|
|
method, devno);
|
|
} else {
|
|
device_chip[devno] = (enum apanel_chip) chip;
|
|
++found;
|
|
}
|
|
}
|
|
iounmap(bios);
|
|
|
|
if (found == 0) {
|
|
pr_info(APANEL ": no input devices reported by BIOS\n");
|
|
return -EIO;
|
|
}
|
|
|
|
return i2c_add_driver(&apanel_driver);
|
|
}
|
|
module_init(apanel_init);
|
|
|
|
static void __exit apanel_cleanup(void)
|
|
{
|
|
i2c_del_driver(&apanel_driver);
|
|
}
|
|
module_exit(apanel_cleanup);
|
|
|
|
MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>");
|
|
MODULE_DESCRIPTION(APANEL_NAME " driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifeBook*:pvr*:rvnFUJITSU:*");
|
|
MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifebook*:pvr*:rvnFUJITSU:*");
|