v6: fixed things addressed by Dmitry Torokhov to v5 (quoted message goes below the patch)
ideapad_slidebar is a new driver which enables slidebars on some Lenovo IdeaPad laptops (the slidebars work with SlideNav/Desktop Navigator under Windows) 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: IdeaPad Y550, Y550P. May work on (testing and adding new models is needed): Ideapad Y560, Y460, Y450, Y650, and, probably, some others. Driver source: https://github.com/o2genum/ideapad-slidebar.git Patch is generated against current mainline kernel. Signed-off-by: Andrey Moiseev <o2g.org...@gmail.com> diff --git a/MAINTAINERS b/MAINTAINERS index defc053..2ff3dd8 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4096,6 +4096,13 @@ W: http://launchpad.net/ideapad-laptop S: Maintained F: drivers/platform/x86/ideapad-laptop.c +IDEAPAD LAPTOP SLIDEBAR DRIVER +M: Andrey Moiseev <o2g.org...@gmail.com> +L: linux-in...@vger.kernel.org +W: https://github.com/o2genum/ideapad-slidebar +S: Maintained +F: drivers/input/misc/ideapad_slidebar.c + IDE/ATAPI DRIVERS M: Borislav Petkov <b...@alien8.de> L: linux-...@vger.kernel.org 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..3d97933 --- /dev/null +++ b/drivers/input/misc/ideapad_slidebar.c @@ -0,0 +1,348 @@ +/* + * Input driver for slidebars on some Lenovo IdeaPad laptops + * + * Copyright (C) 2013 Andrey Moiseev <o2g.org...@gmail.com> + * + * 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/input.h> +#include <linux/io.h> +#include <linux/i8042.h> + +static bool force; +module_param(force, bool, 0); +MODULE_PARM_DESC(force, "Force driver load, ignore DMI data"); + +static spinlock_t sio_lock = __SPIN_LOCK_UNLOCKED(sio_lock); + +static struct input_dev *slidebar_input_dev; +static struct platform_device *slidebar_platform_dev; + +/* Hardware interacting */ +static unsigned char 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); +} + +/* Listening the keyboard (i8042 filter) */ +static bool slidebar_i8042_filter(unsigned char data, unsigned char str, + struct serio *port) +{ + static bool extended = false, touched = false; + + /* Scancodes: e03b on move, e0bb on release */ + if (unlikely(data == 0xe0)) { + extended = true; + return false; + } else if (unlikely(extended && (data == 0x3b))) { + extended = false; + if (!touched) + input_report_key(slidebar_input_dev, BTN_TOUCH, 1); + touched = true; + input_report_abs(slidebar_input_dev, ABS_X, slidebar_pos_get()); + input_sync(slidebar_input_dev); + return false; + } else if (unlikely(extended && (data == 0xbb))) { + touched = false; + input_report_key(slidebar_input_dev, BTN_TOUCH, 0); + input_sync(slidebar_input_dev); + } + return false; +} + +/* 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_attrs[] = { + &dev_attr_slidebar_mode.attr, + NULL +}; + +static struct attribute_group ideapad_attr_group = { + .attrs = ideapad_attrs +}; + +static const struct attribute_group *ideapad_attr_groups[] = { + &ideapad_attr_group, + NULL +}; + +/* Input device */ +static int __init setup_input_dev(void) +{ + int err; + + slidebar_input_dev = input_allocate_device(); + if (!slidebar_input_dev) { + pr_err("ideapad_slidebar: Not enough memory\n"); + return -ENOMEM; + } + + 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_set_abs_params(slidebar_input_dev, ABS_X, 0, 0xff, 0, 0); + + err = i8042_install_filter(slidebar_i8042_filter); + if (err) { + pr_err("ideapad_slidebar: Can't install i8042 filter \n"); + goto err_free_dev; + } + err = input_register_device(slidebar_input_dev); + if (err) { + pr_err("ideapad_slidebar: Failed to register device\n"); + goto err_remove_filter; + } + return 0; + +err_remove_filter: + i8042_remove_filter(slidebar_i8042_filter); +err_free_dev: + input_free_device(slidebar_input_dev); + return err; +} + +static void remove_input_dev(void) +{ + i8042_remove_filter(slidebar_i8042_filter); + input_unregister_device(slidebar_input_dev); +} + +/* Platform device */ +static int __init setup_platform_dev(void) +{ + int err; + slidebar_platform_dev = platform_device_alloc("ideapad_slidebar", -1); + slidebar_platform_dev->dev.groups = ideapad_attr_groups; + 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; +} + +/* Platform driver */ +static struct platform_driver slidebar_drv = { + .driver = { + .name = "ideapad_slidebar", + .owner = THIS_MODULE, + }, +}; + +static int __init 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; +} + +/* DMI */ +static int __init ideapad_dmi_check(const struct dmi_system_id *id) +{ + pr_info("ideapad_slidebar: Laptop model '%s'\n", id->ident); + return 1; +} + +static const struct dmi_system_id ideapad_dmi[] __initconst = { + { + .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 + }, + { NULL, } +}; +MODULE_DEVICE_TABLE(dmi, ideapad_dmi); + +/* Init and cleanup */ +static int __init slidebar_init(void) +{ + int err; + + if (!force && !dmi_check_system(ideapad_dmi)) + return -ENODEV; + err = setup_platform_dev(); + if (err) + return err; + err = register_platform_drv(); + if (err) + goto err_unregister_platform_dev; + err = setup_input_dev(); + if (err) + goto err_unregister_platform_drv; + return 0; + +err_unregister_platform_drv: + platform_driver_unregister(&slidebar_drv); +err_unregister_platform_dev: + platform_device_unregister(slidebar_platform_dev); + return err; +} + +static void __exit slidebar_exit(void) +{ + remove_input_dev(); + platform_device_unregister(slidebar_platform_dev); + platform_driver_unregister(&slidebar_drv); +} + +module_init(slidebar_init); +module_exit(slidebar_exit); + +MODULE_AUTHOR("Andrey Moiseev <o2g.org...@gmail.com>"); +MODULE_DESCRIPTION("Slidebar input support for some Lenovo IdeaPad laptops"); +MODULE_LICENSE("GPL"); -- 1.8.3.4 --- Quoted Re: to v5: > Hi Andrey, > > On Mon, Aug 12, 2013 at 02:23:23PM +0400, Andrey Moiseev wrote: >> v5: __initconst goes after var name >> >> ideapad_slidebar is a new driver which enables slidebars on some >> Lenovo IdeaPad laptops (the slidebars work with SlideNav/Desktop >> Navigator under Windows) >> >> 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: >> IdeaPad Y550, Y550P. >> >> May work on (testing and adding new models is needed): >> Ideapad Y560, Y460, Y450, Y650, >> and, probably, some others. >> >> Driver source: https://github.com/o2genum/ideapad-slidebar.git >> >> Patch is generated against current mainline kernel. >> >> Signed-off-by: Andrey Moiseev <o2g.org...@gmail.com> >> --- >> MAINTAINERS | 7 + >> drivers/input/misc/Kconfig | 9 + >> drivers/input/misc/Makefile | 1 + >> drivers/input/misc/ideapad_slidebar.c | 380 >> ++++++++++++++++++++++++++++++++++ >> 4 files changed, 397 insertions(+) >> create mode 100644 drivers/input/misc/ideapad_slidebar.c >> >> diff --git a/MAINTAINERS b/MAINTAINERS >> index defc053..2ff3dd8 100644 >> --- a/MAINTAINERS >> +++ b/MAINTAINERS >> @@ -4096,6 +4096,13 @@ W: http://launchpad.net/ideapad-laptop >> S: Maintained >> F: drivers/platform/x86/ideapad-laptop.c >> >> +IDEAPAD LAPTOP SLIDEBAR DRIVER >> +M: Andrey Moiseev <o2g.org...@gmail.com> >> +L: linux-in...@vger.kernel.org >> +W: https://github.com/o2genum/ideapad-slidebar >> +S: Maintained >> +F: drivers/input/misc/ideapad_slidebar.c >> + >> IDE/ATAPI DRIVERS >> M: Borislav Petkov <b...@alien8.de> >> L: linux-...@vger.kernel.org >> 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..df437a4 >> --- /dev/null >> +++ b/drivers/input/misc/ideapad_slidebar.c >> @@ -0,0 +1,380 @@ >> +/* >> + * Input driver for slidebars on some Lenovo IdeaPad laptops >> + * >> + * Copyright (C) 2013 Andrey Moiseev <o2g.org...@gmail.com> >> + * >> + * 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/input.h> >> +#include <linux/io.h> >> +#include <linux/i8042.h> >> + >> +static bool force; >> +module_param(force, bool, 0); >> +MODULE_PARM_DESC(force, "Force driver load, ignore DMI data"); >> + >> +static spinlock_t sio_lock = __SPIN_LOCK_UNLOCKED(sio_lock); >> + >> +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; > > A blank line between variables and code is appreciated. > >> + 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); >> +} >> + >> +/* Listening the keyboard (i8042 filter) */ >> +static bool slidebar_i8042_filter(unsigned char data, unsigned char str, >> + struct serio *port) >> +{ >> + static bool extended = false, touched = false; >> + >> + /* Scancodes: e03b on move, e0bb on release */ >> + if (unlikely(data == 0xe0)) { >> + extended = true; >> + return false; >> + } else if (unlikely(extended && (data == 0x3b))) { >> + extended = false; >> + if (!touched) >> + input_report_key(slidebar_input_dev, BTN_TOUCH, 1); >> + touched = true; >> + input_report_abs(slidebar_input_dev, ABS_X, slidebar_pos_get()); >> + input_sync(slidebar_input_dev); >> + return false; >> + } else if (unlikely(extended && (data == 0xbb))) { >> + touched = false; >> + input_report_key(slidebar_input_dev, BTN_TOUCH, 0); >> + input_sync(slidebar_input_dev); >> + } >> + >> + return false; >> +} >> + >> +/* Input device */ >> +static int setup_input_dev(void) >> +{ >> + int err; >> + >> + slidebar_input_dev = input_allocate_device(); >> + if (!slidebar_input_dev) { >> + pr_err("ideapad_slidebar: Not enough memory\n"); >> + return -ENOMEM; >> + } >> + >> + 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); > > This call is not needed, it will be done for you. > >> + 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; >> + } >> + >> + err = i8042_install_filter(slidebar_i8042_filter); >> + if (err) { >> + pr_err("ideapad_slidebar: Can't install i8042 filter \n"); >> + goto err_unregister_dev; >> + } >> + return 0; >> + >> +err_unregister_dev: >> + input_unregister_device(slidebar_input_dev); >> +err_free_dev: >> + input_free_device(slidebar_input_dev); > > No free after unregister for input devices. Consider swapping > registering device and installing the filter (allocated but not > registered input device can take events emitted by the filter just > fine). > >> + return err; >> +} >> + >> +static void remove_input_dev(void) >> +{ >> + i8042_remove_filter(slidebar_i8042_filter); >> + input_unregister_device(slidebar_input_dev); >> + input_free_device(slidebar_input_dev); > > No free after unregister for input devices. > >> +} >> + >> +/* 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); > > To avoid races between creating device and attributes you want to simply > assign your group to the devices group pointer and then it will be > created for you by device core. > >> +} >> + >> +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); > > I do nto understand why you need all these wrappers when you can simply > call platform_device_unregister(). > >> +} >> + >> +/* 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 ideapad_dmi_table[] __initconst = { >> + { >> + .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...@gmail.com>"); >> +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:*"); > > Why not create MODULE_DEVICE_TABLE from dmi table instead of doing it by > hand? > > Thanks. > > -- > Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
