1 // SPDX-License-Identifier: GPL-2.0-or-later
7  * Reverse-engineered from Lenovo SlideNav software (SBarHook.dll).
18  * load with 'force' parameter set 'true'.
20  * LEDs blinking and input mode are managed via sysfs,
45  * All      |  0b01001 -> STD_INT
46  * possible |  0b10001 -> ONMOV_INT
47  * states   |  0b01000 -> OFF_INT
49  *                      |  0b0 -> LAST_POLL
51  *                      |  0b1 -> STD_INT
53  *                      |  0b0 -> OFF_POLL
55  *                      |  0b1 -> OFF_INT
57  * Any state |   0b10000000 ->  if the slidebar has updated data,
59  *				switch to respective POLL mode
60  *				(like 0x0), if not in POLL mode yet.
87 static bool force;  variable
88 module_param(force, bool, 0);
89 MODULE_PARM_DESC(force, "Force driver load, ignore DMI data");
124 static void slidebar_mode_set(u8 mode)  in slidebar_mode_set()  argument
131 	outb(mode, 0xff2b);  in slidebar_mode_set()
182 	u8 mode;  in store_slidebar_mode()  local
185 	error = kstrtou8(buf, 0, &mode);  in store_slidebar_mode()
189 	slidebar_mode_set(mode);  in store_slidebar_mode()
216 		dev_err(&pdev->dev, "IO ports are busy\n");  in ideapad_probe()
217 		return -EBUSY;  in ideapad_probe()
222 		dev_err(&pdev->dev, "Failed to allocate input device\n");  in ideapad_probe()
223 		err = -ENOMEM;  in ideapad_probe()
227 	slidebar_input_dev->name = "IdeaPad Slidebar";  in ideapad_probe()
228 	slidebar_input_dev->id.bustype = BUS_HOST;  in ideapad_probe()
229 	slidebar_input_dev->dev.parent = &pdev->dev;  in ideapad_probe()
236 		dev_err(&pdev->dev,  in ideapad_probe()
243 		dev_err(&pdev->dev,  in ideapad_probe()
277 	pr_info("Laptop model '%s'\n", id->ident);  in ideapad_dmi_check()
308 	if (!force && !dmi_check_system(ideapad_dmi)) {  in slidebar_init()
310 		return -ENODEV;  in slidebar_init()
313 	slidebar_platform_dev = platform_device_alloc("ideapad_slidebar", -1);  in slidebar_init()
316 		return -ENOMEM;  in slidebar_init()
319 	slidebar_platform_dev->dev.groups = ideapad_attr_groups;  in slidebar_init()