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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305// 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){ 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[] = { { .name = "fujitsu_apanel" }, { }};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:*");