Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Input driver for slidebars on some Lenovo IdeaPad laptops
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2013 Andrey Moiseev <o2g.org.ru@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Reverse-engineered from Lenovo SlideNav software (SBarHook.dll).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Trademarks are the property of their respective owners.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * Currently tested and works on:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  *	Lenovo IdeaPad Y550
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  *	Lenovo IdeaPad Y550P
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  * Other models can be added easily. To test,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18)  * load with 'force' parameter set 'true'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20)  * LEDs blinking and input mode are managed via sysfs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * (hex, unsigned byte value):
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * /sys/devices/platform/ideapad_slidebar/slidebar_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * The value is in byte range, however, I only figured out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * how bits 0b10011001 work. Some other bits, probably,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * are meaningfull too.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  * Possible states:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * STD_INT, ONMOV_INT, OFF_INT, LAST_POLL, OFF_POLL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * Meaning:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  *           released      touched
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  * STD       'heartbeat'   lights follow the finger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  * ONMOV     no lights     lights follow the finger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * LAST      at last pos   lights follow the finger
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  * OFF       no lights     no lights
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  * INT       all input events are generated, interrupts are used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  * POLL      no input events by default, to get them,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  *	     send 0b10000000 (read below)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * Commands: write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * All      |  0b01001 -> STD_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  * possible |  0b10001 -> ONMOV_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  * states   |  0b01000 -> OFF_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  *                      |  0b0 -> LAST_POLL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  * STD_INT or ONMOV_INT |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)  *                      |  0b1 -> STD_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  *                      |  0b0 -> OFF_POLL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * OFF_INT or OFF_POLL  |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  *                      |  0b1 -> OFF_INT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * Any state |   0b10000000 ->  if the slidebar has updated data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  *				produce one input event (last position),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  *				switch to respective POLL mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  *				(like 0x0), if not in POLL mode yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  * Get current state: read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  * masked by 0x11 read value means:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  * 0x00   LAST
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67)  * 0x01   STD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68)  * 0x10   OFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69)  * 0x11   ONMOV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) #include <linux/dmi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) #include <linux/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) #include <linux/ioport.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) #include <linux/i8042.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) #include <linux/serio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) #define IDEAPAD_BASE	0xff29
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static bool force;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) module_param(force, bool, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static DEFINE_SPINLOCK(io_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) static struct input_dev *slidebar_input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) static struct platform_device *slidebar_platform_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) static u8 slidebar_pos_get(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	u8 res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	spin_lock_irqsave(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	outb(0xf4, 0xff29);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	outb(0xbf, 0xff2a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	res = inb(0xff2b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	spin_unlock_irqrestore(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static u8 slidebar_mode_get(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	u8 res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	spin_lock_irqsave(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	outb(0xf7, 0xff29);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	outb(0x8b, 0xff2a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	res = inb(0xff2b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	spin_unlock_irqrestore(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	return res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void slidebar_mode_set(u8 mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	spin_lock_irqsave(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	outb(0xf7, 0xff29);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	outb(0x8b, 0xff2a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	outb(mode, 0xff2b);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	spin_unlock_irqrestore(&io_lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static bool slidebar_i8042_filter(unsigned char data, unsigned char str,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 				  struct serio *port)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	static bool extended = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	/* We are only interested in data coming form KBC port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	if (str & I8042_STR_AUXDATA)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	/* Scancodes: e03b on move, e0bb on release. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	if (data == 0xe0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		extended = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	if (!extended)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	extended = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	if (likely((data & 0x7f) != 0x3b)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		serio_interrupt(port, 0xe0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	if (data & 0x80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		input_report_key(slidebar_input_dev, BTN_TOUCH, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		input_report_key(slidebar_input_dev, BTN_TOUCH, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		input_report_abs(slidebar_input_dev, ABS_X, slidebar_pos_get());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	input_sync(slidebar_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) static ssize_t show_slidebar_mode(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 				  struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 				  char *buf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	return sprintf(buf, "%x\n", slidebar_mode_get());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) static ssize_t store_slidebar_mode(struct device *dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 				   struct device_attribute *attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 				   const char *buf, size_t count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	u8 mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	error = kstrtou8(buf, 0, &mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	slidebar_mode_set(mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) static DEVICE_ATTR(slidebar_mode, S_IWUSR | S_IRUGO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		   show_slidebar_mode, store_slidebar_mode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static struct attribute *ideapad_attrs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	&dev_attr_slidebar_mode.attr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) static struct attribute_group ideapad_attr_group = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	.attrs = ideapad_attrs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) static const struct attribute_group *ideapad_attr_groups[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	&ideapad_attr_group,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) static int __init ideapad_probe(struct platform_device* pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (!request_region(IDEAPAD_BASE, 3, "ideapad_slidebar")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		dev_err(&pdev->dev, "IO ports are busy\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	slidebar_input_dev = input_allocate_device();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	if (!slidebar_input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		dev_err(&pdev->dev, "Failed to allocate input device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 		err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 		goto err_release_ports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	slidebar_input_dev->name = "IdeaPad Slidebar";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	slidebar_input_dev->id.bustype = BUS_HOST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	slidebar_input_dev->dev.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	input_set_capability(slidebar_input_dev, EV_KEY, BTN_TOUCH);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	input_set_capability(slidebar_input_dev, EV_ABS, ABS_X);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	input_set_abs_params(slidebar_input_dev, ABS_X, 0, 0xff, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	err = i8042_install_filter(slidebar_i8042_filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 		dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 			"Failed to install i8042 filter: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		goto err_free_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	err = input_register_device(slidebar_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 		dev_err(&pdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 			"Failed to register input device: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		goto err_remove_filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) err_remove_filter:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	i8042_remove_filter(slidebar_i8042_filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) err_free_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	input_free_device(slidebar_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) err_release_ports:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	release_region(IDEAPAD_BASE, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) static int ideapad_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	i8042_remove_filter(slidebar_i8042_filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	input_unregister_device(slidebar_input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	release_region(IDEAPAD_BASE, 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static struct platform_driver slidebar_drv = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		.name = "ideapad_slidebar",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	.remove = ideapad_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static int __init ideapad_dmi_check(const struct dmi_system_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	pr_info("Laptop model '%s'\n", id->ident);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static const struct dmi_system_id ideapad_dmi[] __initconst = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		.ident = "Lenovo IdeaPad Y550",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		.matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 			DMI_MATCH(DMI_PRODUCT_NAME, "20017"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Y550")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		.callback = ideapad_dmi_check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 		.ident = "Lenovo IdeaPad Y550P",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 		.matches = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 			DMI_MATCH(DMI_PRODUCT_NAME, "20035"),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Y550P")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 		},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 		.callback = ideapad_dmi_check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	{ NULL, }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) MODULE_DEVICE_TABLE(dmi, ideapad_dmi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) static int __init slidebar_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	if (!force && !dmi_check_system(ideapad_dmi)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		pr_err("DMI does not match\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	slidebar_platform_dev = platform_device_alloc("ideapad_slidebar", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	if (!slidebar_platform_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		pr_err("Not enough memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	slidebar_platform_dev->dev.groups = ideapad_attr_groups;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	err = platform_device_add(slidebar_platform_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		pr_err("Failed to register platform device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		goto err_free_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	err = platform_driver_probe(&slidebar_drv, ideapad_probe);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 		pr_err("Failed to register platform driver\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		goto err_delete_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) err_delete_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 	platform_device_del(slidebar_platform_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) err_free_dev:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 	platform_device_put(slidebar_platform_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) static void __exit slidebar_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	platform_device_unregister(slidebar_platform_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	platform_driver_unregister(&slidebar_drv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) module_init(slidebar_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) module_exit(slidebar_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) MODULE_AUTHOR("Andrey Moiseev <o2g.org.ru@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) MODULE_DESCRIPTION("Slidebar input support for some Lenovo IdeaPad laptops");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) MODULE_LICENSE("GPL");