PageRenderTime 33ms CodeModel.GetById 12ms app.highlight 17ms RepoModel.GetById 1ms app.codeStats 0ms

/drivers/platform/x86/hp_accel.c

http://github.com/mirrors/linux
C | 431 lines | 316 code | 60 blank | 55 comment | 25 complexity | 3a04ee3c8c204f4c9174cd2db0f2b522 MD5 | raw file
  1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 *  hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
  4 *
  5 *  Copyright (C) 2007-2008 Yan Burman
  6 *  Copyright (C) 2008 Eric Piel
  7 *  Copyright (C) 2008-2009 Pavel Machek
  8 */
  9
 10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 11
 12#include <linux/kernel.h>
 13#include <linux/init.h>
 14#include <linux/dmi.h>
 15#include <linux/module.h>
 16#include <linux/types.h>
 17#include <linux/platform_device.h>
 18#include <linux/interrupt.h>
 19#include <linux/delay.h>
 20#include <linux/wait.h>
 21#include <linux/poll.h>
 22#include <linux/freezer.h>
 23#include <linux/uaccess.h>
 24#include <linux/leds.h>
 25#include <linux/atomic.h>
 26#include <linux/acpi.h>
 27#include <linux/i8042.h>
 28#include <linux/serio.h>
 29#include "../../misc/lis3lv02d/lis3lv02d.h"
 30
 31#define DRIVER_NAME     "hp_accel"
 32#define ACPI_MDPS_CLASS "accelerometer"
 33
 34/* Delayed LEDs infrastructure ------------------------------------ */
 35
 36/* Special LED class that can defer work */
 37struct delayed_led_classdev {
 38	struct led_classdev led_classdev;
 39	struct work_struct work;
 40	enum led_brightness new_brightness;
 41
 42	unsigned int led;		/* For driver */
 43	void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
 44};
 45
 46static inline void delayed_set_status_worker(struct work_struct *work)
 47{
 48	struct delayed_led_classdev *data =
 49			container_of(work, struct delayed_led_classdev, work);
 50
 51	data->set_brightness(data, data->new_brightness);
 52}
 53
 54static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
 55			      enum led_brightness brightness)
 56{
 57	struct delayed_led_classdev *data = container_of(led_cdev,
 58			     struct delayed_led_classdev, led_classdev);
 59	data->new_brightness = brightness;
 60	schedule_work(&data->work);
 61}
 62
 63/* HP-specific accelerometer driver ------------------------------------ */
 64
 65/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
 66 * HPQ6000 sends through the keyboard bus */
 67#define ACCEL_1 0x25
 68#define ACCEL_2 0x26
 69#define ACCEL_3 0x27
 70#define ACCEL_4 0x28
 71
 72/* For automatic insertion of the module */
 73static const struct acpi_device_id lis3lv02d_device_ids[] = {
 74	{"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
 75	{"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
 76	{"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
 77	{"", 0},
 78};
 79MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
 80
 81
 82/**
 83 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
 84 * @lis3: pointer to the device struct
 85 *
 86 * Returns 0 on success.
 87 */
 88static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
 89{
 90	struct acpi_device *dev = lis3->bus_priv;
 91	if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
 92				 NULL, NULL) != AE_OK)
 93		return -EINVAL;
 94
 95	return 0;
 96}
 97
 98/**
 99 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
100 * @lis3: pointer to the device struct
101 * @reg:    the register to read
102 * @ret:    result of the operation
103 *
104 * Returns 0 on success.
105 */
106static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
107{
108	struct acpi_device *dev = lis3->bus_priv;
109	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
110	struct acpi_object_list args = { 1, &arg0 };
111	unsigned long long lret;
112	acpi_status status;
113
114	arg0.integer.value = reg;
115
116	status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
117	if (ACPI_FAILURE(status))
118		return -EINVAL;
119	*ret = lret;
120	return 0;
121}
122
123/**
124 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
125 * @lis3: pointer to the device struct
126 * @reg:    the register to write to
127 * @val:    the value to write
128 *
129 * Returns 0 on success.
130 */
131static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
132{
133	struct acpi_device *dev = lis3->bus_priv;
134	unsigned long long ret; /* Not used when writting */
135	union acpi_object in_obj[2];
136	struct acpi_object_list args = { 2, in_obj };
137
138	in_obj[0].type          = ACPI_TYPE_INTEGER;
139	in_obj[0].integer.value = reg;
140	in_obj[1].type          = ACPI_TYPE_INTEGER;
141	in_obj[1].integer.value = val;
142
143	if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
144		return -EINVAL;
145
146	return 0;
147}
148
149static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
150{
151	lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
152	pr_info("hardware type %s found\n", dmi->ident);
153
154	return 1;
155}
156
157/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
158 * If the value is negative, the opposite of the hw value is used. */
159#define DEFINE_CONV(name, x, y, z)			      \
160	static union axis_conversion lis3lv02d_axis_##name = \
161		{ .as_array = { x, y, z } }
162DEFINE_CONV(normal, 1, 2, 3);
163DEFINE_CONV(y_inverted, 1, -2, 3);
164DEFINE_CONV(x_inverted, -1, 2, 3);
165DEFINE_CONV(x_inverted_usd, -1, 2, -3);
166DEFINE_CONV(z_inverted, 1, 2, -3);
167DEFINE_CONV(xy_swap, 2, 1, 3);
168DEFINE_CONV(xy_rotated_left, -2, 1, 3);
169DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
170DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
171DEFINE_CONV(xy_rotated_right, 2, -1, 3);
172DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
173
174#define AXIS_DMI_MATCH(_ident, _name, _axis) {		\
175	.ident = _ident,				\
176	.callback = lis3lv02d_dmi_matched,		\
177	.matches = {					\
178		DMI_MATCH(DMI_PRODUCT_NAME, _name)	\
179	},						\
180	.driver_data = &lis3lv02d_axis_##_axis		\
181}
182
183#define AXIS_DMI_MATCH2(_ident, _class1, _name1,	\
184				_class2, _name2,	\
185				_axis) {		\
186	.ident = _ident,				\
187	.callback = lis3lv02d_dmi_matched,		\
188	.matches = {					\
189		DMI_MATCH(DMI_##_class1, _name1),	\
190		DMI_MATCH(DMI_##_class2, _name2),	\
191	},						\
192	.driver_data = &lis3lv02d_axis_##_axis		\
193}
194static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
195	/* product names are truncated to match all kinds of a same model */
196	AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
197	AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
198	AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
199	AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
200	AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
201	AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
202	AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
203	AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
204	AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
205	AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
206	AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
207	AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
208	AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
209	AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
210	AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
211	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
212	AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
213	AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
214	AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
215	/* Intel-based HP Pavilion dv5 */
216	AXIS_DMI_MATCH2("HPDV5_I",
217			PRODUCT_NAME, "HP Pavilion dv5",
218			BOARD_NAME, "3603",
219			x_inverted),
220	/* AMD-based HP Pavilion dv5 */
221	AXIS_DMI_MATCH2("HPDV5_A",
222			PRODUCT_NAME, "HP Pavilion dv5",
223			BOARD_NAME, "3600",
224			y_inverted),
225	AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
226	AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
227	AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
228	AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
229	AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
230	AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
231	AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
232	AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
233	AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
234	AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
235	AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
236	AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
237	AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
238	AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
239	AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
240	AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
241	AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
242	AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
243	AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
244	AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
245	{ NULL, }
246/* Laptop models without axis info (yet):
247 * "NC6910" "HP Compaq 6910"
248 * "NC2400" "HP Compaq nc2400"
249 * "NX74x0" "HP Compaq nx74"
250 * "NX6325" "HP Compaq nx6325"
251 * "NC4400" "HP Compaq nc4400"
252 */
253};
254
255static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
256{
257	struct acpi_device *dev = lis3_dev.bus_priv;
258	unsigned long long ret; /* Not used when writing */
259	union acpi_object in_obj[1];
260	struct acpi_object_list args = { 1, in_obj };
261
262	in_obj[0].type          = ACPI_TYPE_INTEGER;
263	in_obj[0].integer.value = !!value;
264
265	acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
266}
267
268static struct delayed_led_classdev hpled_led = {
269	.led_classdev = {
270		.name			= "hp::hddprotect",
271		.default_trigger	= "none",
272		.brightness_set		= delayed_sysfs_set,
273		.flags                  = LED_CORE_SUSPENDRESUME,
274	},
275	.set_brightness = hpled_set,
276};
277
278static acpi_status
279lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
280{
281	if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
282		struct acpi_resource_extended_irq *irq;
283		u32 *device_irq = context;
284
285		irq = &resource->data.extended_irq;
286		*device_irq = irq->interrupts[0];
287	}
288
289	return AE_OK;
290}
291
292static void lis3lv02d_enum_resources(struct acpi_device *device)
293{
294	acpi_status status;
295
296	status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
297					lis3lv02d_get_resource, &lis3_dev.irq);
298	if (ACPI_FAILURE(status))
299		printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
300}
301
302static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
303				  struct serio *port)
304{
305	static bool extended;
306
307	if (str & I8042_STR_AUXDATA)
308		return false;
309
310	if (data == 0xe0) {
311		extended = true;
312		return true;
313	} else if (unlikely(extended)) {
314		extended = false;
315
316		switch (data) {
317		case ACCEL_1:
318		case ACCEL_2:
319		case ACCEL_3:
320		case ACCEL_4:
321			return true;
322		default:
323			serio_interrupt(port, 0xe0, 0);
324			return false;
325		}
326	}
327
328	return false;
329}
330
331static int lis3lv02d_add(struct acpi_device *device)
332{
333	int ret;
334
335	if (!device)
336		return -EINVAL;
337
338	lis3_dev.bus_priv = device;
339	lis3_dev.init = lis3lv02d_acpi_init;
340	lis3_dev.read = lis3lv02d_acpi_read;
341	lis3_dev.write = lis3lv02d_acpi_write;
342	strcpy(acpi_device_name(device), DRIVER_NAME);
343	strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
344	device->driver_data = &lis3_dev;
345
346	/* obtain IRQ number of our device from ACPI */
347	lis3lv02d_enum_resources(device);
348
349	/* If possible use a "standard" axes order */
350	if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
351		pr_info("Using custom axes %d,%d,%d\n",
352			lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
353	} else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
354		pr_info("laptop model unknown, using default axes configuration\n");
355		lis3_dev.ac = lis3lv02d_axis_normal;
356	}
357
358	/* call the core layer do its init */
359	ret = lis3lv02d_init_device(&lis3_dev);
360	if (ret)
361		return ret;
362
363	/* filter to remove HPQ6000 accelerometer data
364	 * from keyboard bus stream */
365	if (strstr(dev_name(&device->dev), "HPQ6000"))
366		i8042_install_filter(hp_accel_i8042_filter);
367
368	INIT_WORK(&hpled_led.work, delayed_set_status_worker);
369	ret = led_classdev_register(NULL, &hpled_led.led_classdev);
370	if (ret) {
371		lis3lv02d_joystick_disable(&lis3_dev);
372		lis3lv02d_poweroff(&lis3_dev);
373		flush_work(&hpled_led.work);
374		return ret;
375	}
376
377	return ret;
378}
379
380static int lis3lv02d_remove(struct acpi_device *device)
381{
382	if (!device)
383		return -EINVAL;
384
385	i8042_remove_filter(hp_accel_i8042_filter);
386	lis3lv02d_joystick_disable(&lis3_dev);
387	lis3lv02d_poweroff(&lis3_dev);
388
389	led_classdev_unregister(&hpled_led.led_classdev);
390	flush_work(&hpled_led.work);
391
392	return lis3lv02d_remove_fs(&lis3_dev);
393}
394
395
396#ifdef CONFIG_PM_SLEEP
397static int lis3lv02d_suspend(struct device *dev)
398{
399	/* make sure the device is off when we suspend */
400	lis3lv02d_poweroff(&lis3_dev);
401	return 0;
402}
403
404static int lis3lv02d_resume(struct device *dev)
405{
406	lis3lv02d_poweron(&lis3_dev);
407	return 0;
408}
409
410static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
411#define HP_ACCEL_PM (&hp_accel_pm)
412#else
413#define HP_ACCEL_PM NULL
414#endif
415
416/* For the HP MDPS aka 3D Driveguard */
417static struct acpi_driver lis3lv02d_driver = {
418	.name  = DRIVER_NAME,
419	.class = ACPI_MDPS_CLASS,
420	.ids   = lis3lv02d_device_ids,
421	.ops = {
422		.add     = lis3lv02d_add,
423		.remove  = lis3lv02d_remove,
424	},
425	.drv.pm = HP_ACCEL_PM,
426};
427module_acpi_driver(lis3lv02d_driver);
428
429MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
430MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
431MODULE_LICENSE("GPL");