ideapad-slidebar is a new driver which enables slidebars on some Lenovo IdeaPad laptops. Fixes this: https://bugzilla.kernel.org/show_bug.cgi?id=16004 Registers 'IdeaPad Slidebar' input device and /sys/devices/platform/ideapad_slidebar/slidebar_mode for switching slidebar's modes. Now works on: * Lenovo IdeaPad Y550 * Lenovo IdeaPad Y550P Driver source: https://github.com/o2genum/ideapad-slidebar.git Signed-off-by: Andrey Moiseev <o2g.org.ru@xxxxxxxxx> --- drivers/input/misc/Kconfig | 9 + drivers/input/misc/Makefile | 1 + drivers/input/misc/ideapad_slidebar.c | 378 ++++++++++++++++++++++++++++++++++ 3 files changed, 388 insertions(+) create mode 100644 drivers/input/misc/ideapad_slidebar.c diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig index 0b541cd..45729a9 100644 --- a/drivers/input/misc/Kconfig +++ b/drivers/input/misc/Kconfig @@ -647,4 +647,13 @@ config INPUT_SIRFSOC_ONKEY If unsure, say N. +config INPUT_IDEAPAD_SLIDEBAR + tristate "IdeaPad Laptop Slidebar" + depends on INPUT + help + Input driver for slidebars on some Lenovo IdeaPad laptops. + + If you have an IdeaPad laptop with a slidebar, say Y or M here. + Module name is ideapad_slidebar. + endif diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile index 829de43..0ebfb6d 100644 --- a/drivers/input/misc/Makefile +++ b/drivers/input/misc/Makefile @@ -61,3 +61,4 @@ obj-$(CONFIG_INPUT_WISTRON_BTNS) += wistron_btns.o obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o obj-$(CONFIG_INPUT_YEALINK) += yealink.o +obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) += ideapad_slidebar.o diff --git a/drivers/input/misc/ideapad_slidebar.c b/drivers/input/misc/ideapad_slidebar.c new file mode 100644 index 0000000..78294fd --- /dev/null +++ b/drivers/input/misc/ideapad_slidebar.c @@ -0,0 +1,378 @@ +/* + * Input driver for slidebars on some Lenovo IdeaPad laptops + * + * Copyright (C) 2013 Andrey Moiseev <o2g.org.ru@xxxxxxxxx> + * + * Reverse-engineered from Lenovo SlideNav software (SBarHook.dll). + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; either version 2 of the License, or (at your option) + * any later version. + * + * Trademarks are the property of their respective owners. + */ + +/* Currently tested and works on: + * Lenovo IdeaPad Y550 + * Lenovo IdeaPad Y550P + * + * Other models can be added easily. To test, + * load with 'force' parameter set 'true'. + * + * LEDs blinking and input mode are managed via sysfs, + * (hex, unsigned byte value): + * /sys/devices/platform/ideapad_slidebar/slidebar_mode + * + * The value is in byte range, however, I only figured out + * how bits 0b10011001 work. Some other bits, probably, + * are meaningfull too. + * + * Possible states: + * + * STD_INT, ONMOV_INT, OFF_INT, LAST_POLL, OFF_POLL + * + * Meaning: + * released touched + * STD 'heartbeat' lights follow the finger + * ONMOV no lights lights follow the finger + * LAST at last pos lights follow the finger + * OFF no lights no lights + * + * INT all input events are generated, interrupts are used + * POLL no input events by default, to get them, + * send 0b10000000 (read below) + * + * Commands: write + * + * All | 0b01001 -> STD_INT + * possible | 0b10001 -> ONMOV_INT + * states | 0b01000 -> OFF_INT + * + * | 0b0 -> LAST_POLL + * STD_INT or ONMOV_INT | + * | 0b1 -> STD_INT + * + * | 0b0 -> OFF_POLL + * OFF_INT or OFF_POLL | + * | 0b1 -> OFF_INT + * + * Any state | 0b10000000 -> if the slidebar has updated data, + * produce one input event (last position), + * switch to respective POLL mode + * (like 0x0), if not in POLL mode yet. + * + * Get current state: read + * + * masked by 0x11 read value means: + * + * 0x00 LAST + * 0x01 STD + * 0x10 OFF + * 0x11 ONMOV + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/dmi.h> +#include <linux/spinlock.h> +#include <linux/platform_device.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/input.h> +#include <linux/io.h> + +static bool force; +module_param(force, bool, 0); +MODULE_PARM_DESC(force, "Force driver load, ignore DMI data"); + +#define KBD_IRQ 1 + +spinlock_t sio_lock = __SPIN_LOCK_UNLOCKED(sio_lock); + +static int prev_scancode; +static int touched; +static struct input_dev *slidebar_input_dev; +static struct platform_device *slidebar_platform_dev; + +/* Hardware interacting */ +static int slidebar_pos_get(void) +{ + int res; + unsigned long flags; + spin_lock_irqsave(&sio_lock, flags); + outb(0xf4, 0xff29); + outb(0xbf, 0xff2a); + res = inb(0xff2b); + spin_unlock_irqrestore(&sio_lock, flags); + return res; +} + +static unsigned char slidebar_mode_get(void) +{ + int res; + unsigned long flags; + spin_lock_irqsave(&sio_lock, flags); + outb(0xf7, 0xff29); + outb(0x8b, 0xff2a); + res = inb(0xff2b); + spin_unlock_irqrestore(&sio_lock, flags); + return res; +} + +static void slidebar_mode_set(unsigned char mode) +{ + unsigned long flags; + spin_lock_irqsave(&sio_lock, flags); + outb(0xf7, 0xff29); + outb(0x8b, 0xff2a); + outb(mode, 0xff2b); + spin_unlock_irqrestore(&sio_lock, flags); +} + +/* Keyboard handler */ +static irq_handler_t kbd_irq_handler(int irq, void *dev_id, + struct pt_regs *regs) +{ + /* Scancodes: e03b on move, bb on release */ + int scancode = inb(0x60); + if (scancode == 0xbb) { + touched = 0; + input_report_key(slidebar_input_dev, BTN_TOUCH, 0); + input_sync(slidebar_input_dev); + } else if (prev_scancode == 0xe0 && scancode == 0x3b) { + if (!touched) + input_report_key(slidebar_input_dev, BTN_TOUCH, 1); + touched = 1; + input_report_abs(slidebar_input_dev, ABS_X, slidebar_pos_get()); + input_sync(slidebar_input_dev); + } + prev_scancode = scancode; + return (irq_handler_t) IRQ_HANDLED; +} + +/* Input device */ +static int setup_input_dev(void) +{ + int err; + err = request_irq(KBD_IRQ, (irq_handler_t) kbd_irq_handler, IRQF_SHARED, + "ideapad_slidebar", (void *)(kbd_irq_handler)); + if (err) { + pr_err("ideapad_slidebar: Can't allocate irq %d\n", KBD_IRQ); + return -EBUSY; + } + + slidebar_input_dev = input_allocate_device(); + if (!slidebar_input_dev) { + pr_err("ideapad_slidebar: Not enough memory\n"); + err = -ENOMEM; + goto err_free_irq; + } + + slidebar_input_dev->name = "IdeaPad Slidebar"; + slidebar_input_dev->id.bustype = BUS_HOST; + slidebar_input_dev->dev.parent = &slidebar_platform_dev->dev; + input_set_capability(slidebar_input_dev, EV_KEY, BTN_TOUCH); + input_set_capability(slidebar_input_dev, EV_ABS, ABS_X); + input_alloc_absinfo(slidebar_input_dev); + input_set_abs_params(slidebar_input_dev, ABS_X, 0, 0xff, 0, 0); + + err = input_register_device(slidebar_input_dev); + if (err) { + pr_err("ideapad_slidebar: Failed to register device\n"); + goto err_free_dev; + } + return 0; + +err_free_dev: + input_free_device(slidebar_input_dev); +err_free_irq: + free_irq(KBD_IRQ, (void *)(kbd_irq_handler)); + return err; +} + +static void remove_input_dev(void) +{ + free_irq(KBD_IRQ, (void *)(kbd_irq_handler)); + input_unregister_device(slidebar_input_dev); + input_free_device(slidebar_input_dev); +} + +/* Sysfs slidebar_mode interface */ +static ssize_t show_slidebar_mode(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%x\n", slidebar_mode_get()); +} + +static ssize_t store_slidebar_mode(struct device *dev, + struct device_attribute *attr, + const char *buf, size_t count) +{ + int mode; + if (!count) + return 0; + + if (sscanf(buf, "%x", &mode) != 1) + return -EINVAL; + + slidebar_mode_set(mode); + return count; +} + +static DEVICE_ATTR(slidebar_mode, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH, + show_slidebar_mode, store_slidebar_mode); + +static struct attribute *ideapad_attributes[] = { + &dev_attr_slidebar_mode.attr, + NULL +}; + +static struct attribute_group ideapad_attribute_group = { + .attrs = ideapad_attributes +}; + +static int setup_slidebar_mode_dev(void) +{ + return sysfs_create_group(&slidebar_platform_dev->dev.kobj, + &ideapad_attribute_group); +} + +static void remove_slidebar_mode_dev(void) +{ + return sysfs_remove_group(&slidebar_platform_dev->dev.kobj, + &ideapad_attribute_group); +} + +/* Platform device */ +static int setup_platform_dev(void) +{ + int err; + slidebar_platform_dev = platform_device_alloc("ideapad_slidebar", -1); + if (!slidebar_platform_dev) { + pr_err("ideapad_slidebar: Not enough memory\n"); + return -ENOMEM; + } + + err = platform_device_add(slidebar_platform_dev); + if (err) { + pr_err("ideapad_slidebar: Failed to register plarform device\n"); + goto err_free_platform_device; + } + return 0; + +err_free_platform_device: + platform_device_put(slidebar_platform_dev); + return err; +} + +static void remove_platform_dev(void) +{ + platform_device_del(slidebar_platform_dev); + platform_device_put(slidebar_platform_dev); +} + +/* Platform driver */ +static struct platform_driver slidebar_drv = { + .driver = { + .name = "ideapad_slidebar", + .owner = THIS_MODULE, + }, +}; + +static int register_platform_drv(void) +{ + int err; + err = platform_driver_register(&slidebar_drv); + if (err) + pr_err("ideapad_slidebar: Failed to register platform driver\n"); + + return err; +} + +static void unregister_platform_drv(void) +{ + platform_driver_unregister(&slidebar_drv); +} + +/* DMI */ +static int ideapad_dmi_check(const struct dmi_system_id *id) +{ + pr_info("ideapad_slidebar: Laptop model '%s'\n", id->ident); + return 1; +} + +static struct dmi_system_id __initdata ideapad_dmi_table[] = { + { + .ident = "Lenovo IdeaPad Y550", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "20017"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Y550") + }, + .callback = ideapad_dmi_check + }, + { + .ident = "Lenovo IdeaPad Y550P", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "20035"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Y550P") + }, + .callback = ideapad_dmi_check + } +}; + +/* Init and cleanup */ +static int __init slidebar_init(void) +{ + int err; + + if (!force && !dmi_check_system(ideapad_dmi_table)) + return -ENODEV; + + err = setup_platform_dev(); + if (err) + return err; + + err = register_platform_drv(); + if (err) + goto err_remove_platform_dev; + + err = setup_input_dev(); + if (err) + goto err_unregister_platform_drv; + + err = setup_slidebar_mode_dev(); + if (err) + goto err_remove_input_dev; + return 0; + +err_remove_input_dev: + remove_input_dev(); +err_unregister_platform_drv: + unregister_platform_drv(); +err_remove_platform_dev: + remove_platform_dev(); + return err; +} + +static void __exit slidebar_exit(void) +{ + remove_slidebar_mode_dev(); + remove_input_dev(); + remove_platform_dev(); + unregister_platform_drv(); +} + +module_init(slidebar_init); +module_exit(slidebar_exit); + +MODULE_AUTHOR("Andrey Moiseev <o2g.org.ru@xxxxxxxxx>"); +MODULE_DESCRIPTION("Slidebar input support for some Lenovo IdeaPad laptops"); +MODULE_LICENSE("GPL"); +MODULE_VERSION("0.1"); + +MODULE_ALIAS("dmi:*:svnLENOVO:pn20017:pvrLenovoIdeaPadY550:*"); +MODULE_ALIAS("dmi:*:svnLENOVO:pn20035:pvrLenovoIdeaPadY550P:*"); -- 1.8.3.3 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
