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Release 4.11 drivers/input/misc/apanel.c

/*
 *  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>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * 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-polldev.h>
#include <linux/i2c.h>
#include <linux/workqueue.h>
#include <linux/leds.h>


#define APANEL_NAME	"Fujitsu Application Panel"

#define APANEL_VERSION	"1.3.1"

#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_polled_dev *ipdev;
	
struct i2c_client *client;
	
unsigned short keymap[MAX_PANEL_KEYS];
	
u16    nkeys;
	
u16    led_bits;
	
struct work_struct led_work;
	
struct led_classdev mail_led;
};


static int apanel_probe(struct i2c_client *, const struct i2c_device_id *);


static void report_key(struct input_dev *input, unsigned keycode) { pr_debug(APANEL ": report key %#x\n", keycode); input_report_key(input, keycode, 1); input_sync(input); input_report_key(input, keycode, 0); input_sync(input); }

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Stephen Hemminger50100.00%1100.00%
Total50100.00%1100.00%

/* 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_polled_dev *ipdev) { struct apanel *ap = ipdev->private; struct input_dev *idev = ipdev->input; 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]); }

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Stephen Hemminger136100.00%1100.00%
Total136100.00%1100.00%

/* Track state changes of LED */
static void led_update(struct work_struct *work) { struct apanel *ap = container_of(work, struct apanel, led_work); i2c_smbus_write_word_data(ap->client, 0x10, ap->led_bits); }

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Stephen Hemminger39100.00%1100.00%
Total39100.00%1100.00%


static void mail_led_set(struct led_classdev *led, enum led_brightness value) { struct apanel *ap = container_of(led, struct apanel, mail_led); if (value != LED_OFF) ap->led_bits |= 0x8000; else ap->led_bits &= ~0x8000; schedule_work(&ap->led_work); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger58100.00%1100.00%
Total58100.00%1100.00%


static int apanel_remove(struct i2c_client *client) { struct apanel *ap = i2c_get_clientdata(client); if (device_chip[APANEL_DEV_LED] != CHIP_NONE) led_classdev_unregister(&ap->mail_led); input_unregister_polled_device(ap->ipdev); input_free_polled_device(ap->ipdev); return 0; }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger5498.18%150.00%
Jean Delvare11.82%150.00%
Total55100.00%2100.00%


static void apanel_shutdown(struct i2c_client *client) { apanel_remove(client); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger1593.75%150.00%
Jean Delvare16.25%150.00%
Total16100.00%2100.00%

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, .remove = &apanel_remove, .shutdown = &apanel_shutdown, .id_table = apanel_id, }; static struct apanel apanel = { .keymap = { [0] = KEY_MAIL, [1] = KEY_WWW, [2] = KEY_PROG2, [3] = KEY_PROG1, [8] = KEY_FORWARD, [9] = KEY_REWIND, [10] = KEY_STOPCD, [11] = KEY_PLAYPAUSE, }, .mail_led = { .name = "mail:blue", .brightness_set = mail_led_set, }, }; /* NB: Only one panel on the i2c. */
static int apanel_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct apanel *ap; struct input_polled_dev *ipdev; struct input_dev *idev; u8 cmd = device_chip[APANEL_DEV_APPBTN] == CHIP_OZ992C ? 0 : 8; int i, err = -ENOMEM; ap = &apanel; ipdev = input_allocate_polled_device(); if (!ipdev) goto out1; ap->ipdev = ipdev; ap->client = client; i2c_set_clientdata(client, ap); err = i2c_smbus_write_word_data(client, cmd, 0); if (err) { dev_warn(&client->dev, APANEL ": smbus write error %d\n", err); goto out3; } ipdev->poll = apanel_poll; ipdev->poll_interval = POLL_INTERVAL_DEFAULT; ipdev->private = ap; idev = ipdev->input; idev->name = APANEL_NAME " buttons"; idev->phys = "apanel/input0"; idev->id.bustype = BUS_HOST; idev->dev.parent = &client->dev; set_bit(EV_KEY, idev->evbit); idev->keycode = ap->keymap; idev->keycodesize = sizeof(ap->keymap[0]); idev->keycodemax = (device_chip[APANEL_DEV_CDBTN] != CHIP_NONE) ? 12 : 4; for (i = 0; i < idev->keycodemax; i++) if (ap->keymap[i]) set_bit(ap->keymap[i], idev->keybit); err = input_register_polled_device(ipdev); if (err) goto out3; INIT_WORK(&ap->led_work, led_update); if (device_chip[APANEL_DEV_LED] != CHIP_NONE) { err = led_classdev_register(&client->dev, &ap->mail_led); if (err) goto out4; } return 0; out4: input_unregister_polled_device(ipdev); out3: input_free_polled_device(ipdev); out1: return err; }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger33597.10%150.00%
Jean Delvare102.90%150.00%
Total345100.00%2100.00%

/* 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; }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger77100.00%1100.00%
Total77100.00%1100.00%


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_warning(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); }

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PersonTokensPropCommitsCommitProp
Stephen Hemminger27697.53%133.33%
Jean Delvare62.12%133.33%
Colin Ian King10.35%133.33%
Total283100.00%3100.00%

module_init(apanel_init);
static void __exit apanel_cleanup(void) { i2c_del_driver(&apanel_driver); }

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Stephen Hemminger15100.00%1100.00%
Total15100.00%1100.00%

module_exit(apanel_cleanup); MODULE_AUTHOR("Stephen Hemminger <shemminger@linux-foundation.org>"); MODULE_DESCRIPTION(APANEL_NAME " driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(APANEL_VERSION); MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifeBook*:pvr*:rvnFUJITSU:*"); MODULE_ALIAS("dmi:*:svnFUJITSU:pnLifebook*:pvr*:rvnFUJITSU:*");

Overall Contributors

PersonTokensPropCommitsCommitProp
Stephen Hemminger135295.89%125.00%
Jean Delvare563.97%125.00%
Márton Németh10.07%125.00%
Colin Ian King10.07%125.00%
Total1410100.00%4100.00%
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