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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/* Delayed LEDs infrastructure ------------------------------------ */
32
33/* Special LED class that can defer work */
34struct delayed_led_classdev {
35 struct led_classdev led_classdev;
36 struct work_struct work;
37 enum led_brightness new_brightness;
38
39 unsigned int led; /* For driver */
40 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
41};
42
43static inline void delayed_set_status_worker(struct work_struct *work)
44{
45 struct delayed_led_classdev *data =
46 container_of(work, struct delayed_led_classdev, work);
47
48 data->set_brightness(data, data->new_brightness);
49}
50
51static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
52 enum led_brightness brightness)
53{
54 struct delayed_led_classdev *data = container_of(led_cdev,
55 struct delayed_led_classdev, led_classdev);
56 data->new_brightness = brightness;
57 schedule_work(&data->work);
58}
59
60/* HP-specific accelerometer driver ------------------------------------ */
61
62/* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
63 * HPQ6000 sends through the keyboard bus */
64#define ACCEL_1 0x25
65#define ACCEL_2 0x26
66#define ACCEL_3 0x27
67#define ACCEL_4 0x28
68
69/* For automatic insertion of the module */
70static const struct acpi_device_id lis3lv02d_device_ids[] = {
71 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
72 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
73 {"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
74 {"", 0},
75};
76MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
77
78/**
79 * lis3lv02d_acpi_init - initialize the device for ACPI
80 * @lis3: pointer to the device struct
81 *
82 * Returns 0 on success.
83 */
84static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
85{
86 return 0;
87}
88
89/**
90 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
91 * @lis3: pointer to the device struct
92 * @reg: the register to read
93 * @ret: result of the operation
94 *
95 * Returns 0 on success.
96 */
97static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
98{
99 struct acpi_device *dev = lis3->bus_priv;
100 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
101 struct acpi_object_list args = { 1, &arg0 };
102 unsigned long long lret;
103 acpi_status status;
104
105 arg0.integer.value = reg;
106
107 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
108 if (ACPI_FAILURE(status))
109 return -EINVAL;
110 *ret = lret;
111 return 0;
112}
113
114/**
115 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
116 * @lis3: pointer to the device struct
117 * @reg: the register to write to
118 * @val: the value to write
119 *
120 * Returns 0 on success.
121 */
122static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
123{
124 struct acpi_device *dev = lis3->bus_priv;
125 unsigned long long ret; /* Not used when writting */
126 union acpi_object in_obj[2];
127 struct acpi_object_list args = { 2, in_obj };
128
129 in_obj[0].type = ACPI_TYPE_INTEGER;
130 in_obj[0].integer.value = reg;
131 in_obj[1].type = ACPI_TYPE_INTEGER;
132 in_obj[1].integer.value = val;
133
134 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
135 return -EINVAL;
136
137 return 0;
138}
139
140static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
141{
142 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
143 pr_info("hardware type %s found\n", dmi->ident);
144
145 return 1;
146}
147
148/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
149 * If the value is negative, the opposite of the hw value is used. */
150#define DEFINE_CONV(name, x, y, z) \
151 static union axis_conversion lis3lv02d_axis_##name = \
152 { .as_array = { x, y, z } }
153DEFINE_CONV(normal, 1, 2, 3);
154DEFINE_CONV(y_inverted, 1, -2, 3);
155DEFINE_CONV(x_inverted, -1, 2, 3);
156DEFINE_CONV(x_inverted_usd, -1, 2, -3);
157DEFINE_CONV(z_inverted, 1, 2, -3);
158DEFINE_CONV(xy_swap, 2, 1, 3);
159DEFINE_CONV(xy_rotated_left, -2, 1, 3);
160DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
161DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
162DEFINE_CONV(xy_rotated_right, 2, -1, 3);
163DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
164
165#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
166 .ident = _ident, \
167 .callback = lis3lv02d_dmi_matched, \
168 .matches = { \
169 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
170 }, \
171 .driver_data = &lis3lv02d_axis_##_axis \
172}
173
174#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
175 _class2, _name2, \
176 _axis) { \
177 .ident = _ident, \
178 .callback = lis3lv02d_dmi_matched, \
179 .matches = { \
180 DMI_MATCH(DMI_##_class1, _name1), \
181 DMI_MATCH(DMI_##_class2, _name2), \
182 }, \
183 .driver_data = &lis3lv02d_axis_##_axis \
184}
185static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
186 /* product names are truncated to match all kinds of a same model */
187 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
188 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
189 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
190 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
191 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
192 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
193 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
194 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
195 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
196 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
197 AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
198 AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
199 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
200 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
201 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
202 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
203 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
204 AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
205 AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
206 /* Intel-based HP Pavilion dv5 */
207 AXIS_DMI_MATCH2("HPDV5_I",
208 PRODUCT_NAME, "HP Pavilion dv5",
209 BOARD_NAME, "3603",
210 x_inverted),
211 /* AMD-based HP Pavilion dv5 */
212 AXIS_DMI_MATCH2("HPDV5_A",
213 PRODUCT_NAME, "HP Pavilion dv5",
214 BOARD_NAME, "3600",
215 y_inverted),
216 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
217 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
218 AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
219 AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
220 AXIS_DMI_MATCH("HPB440G3", "HP ProBook 440 G3", x_inverted_usd),
221 AXIS_DMI_MATCH("HPB440G4", "HP ProBook 440 G4", x_inverted),
222 AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
223 AXIS_DMI_MATCH("HPB450G0", "HP ProBook 450 G0", x_inverted),
224 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
225 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
226 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
227 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
228 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
229 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
230 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
231 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
232 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
233 AXIS_DMI_MATCH("HPZBook15", "HP ZBook 15", x_inverted),
234 AXIS_DMI_MATCH("HPZBook17G5", "HP ZBook 17 G5", x_inverted),
235 AXIS_DMI_MATCH("HPZBook17", "HP ZBook 17", xy_swap_yz_inverted),
236 { NULL, }
237/* Laptop models without axis info (yet):
238 * "NC6910" "HP Compaq 6910"
239 * "NC2400" "HP Compaq nc2400"
240 * "NX74x0" "HP Compaq nx74"
241 * "NX6325" "HP Compaq nx6325"
242 * "NC4400" "HP Compaq nc4400"
243 */
244};
245
246static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
247{
248 struct acpi_device *dev = lis3_dev.bus_priv;
249 unsigned long long ret; /* Not used when writing */
250 union acpi_object in_obj[1];
251 struct acpi_object_list args = { 1, in_obj };
252
253 in_obj[0].type = ACPI_TYPE_INTEGER;
254 in_obj[0].integer.value = !!value;
255
256 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
257}
258
259static struct delayed_led_classdev hpled_led = {
260 .led_classdev = {
261 .name = "hp::hddprotect",
262 .default_trigger = "none",
263 .brightness_set = delayed_sysfs_set,
264 .flags = LED_CORE_SUSPENDRESUME,
265 },
266 .set_brightness = hpled_set,
267};
268
269static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
270 struct serio *port)
271{
272 static bool extended;
273
274 if (str & I8042_STR_AUXDATA)
275 return false;
276
277 if (data == 0xe0) {
278 extended = true;
279 return true;
280 } else if (unlikely(extended)) {
281 extended = false;
282
283 switch (data) {
284 case ACCEL_1:
285 case ACCEL_2:
286 case ACCEL_3:
287 case ACCEL_4:
288 return true;
289 default:
290 serio_interrupt(port, 0xe0, 0);
291 return false;
292 }
293 }
294
295 return false;
296}
297
298static int lis3lv02d_probe(struct platform_device *device)
299{
300 int ret;
301
302 lis3_dev.bus_priv = ACPI_COMPANION(&device->dev);
303 lis3_dev.init = lis3lv02d_acpi_init;
304 lis3_dev.read = lis3lv02d_acpi_read;
305 lis3_dev.write = lis3lv02d_acpi_write;
306
307 /* obtain IRQ number of our device from ACPI */
308 ret = platform_get_irq_optional(device, 0);
309 if (ret > 0)
310 lis3_dev.irq = ret;
311
312 /* If possible use a "standard" axes order */
313 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
314 pr_info("Using custom axes %d,%d,%d\n",
315 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
316 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
317 pr_info("laptop model unknown, using default axes configuration\n");
318 lis3_dev.ac = lis3lv02d_axis_normal;
319 }
320
321 /* call the core layer do its init */
322 ret = lis3lv02d_init_device(&lis3_dev);
323 if (ret)
324 return ret;
325
326 /* filter to remove HPQ6000 accelerometer data
327 * from keyboard bus stream */
328 if (strstr(dev_name(&device->dev), "HPQ6000"))
329 i8042_install_filter(hp_accel_i8042_filter);
330
331 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
332 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
333 if (ret) {
334 i8042_remove_filter(hp_accel_i8042_filter);
335 lis3lv02d_joystick_disable(&lis3_dev);
336 lis3lv02d_poweroff(&lis3_dev);
337 flush_work(&hpled_led.work);
338 lis3lv02d_remove_fs(&lis3_dev);
339 return ret;
340 }
341
342 return ret;
343}
344
345static int lis3lv02d_remove(struct platform_device *device)
346{
347 i8042_remove_filter(hp_accel_i8042_filter);
348 lis3lv02d_joystick_disable(&lis3_dev);
349 lis3lv02d_poweroff(&lis3_dev);
350
351 led_classdev_unregister(&hpled_led.led_classdev);
352 flush_work(&hpled_led.work);
353
354 lis3lv02d_remove_fs(&lis3_dev);
355 return 0;
356}
357
358static int __maybe_unused lis3lv02d_suspend(struct device *dev)
359{
360 /* make sure the device is off when we suspend */
361 lis3lv02d_poweroff(&lis3_dev);
362 return 0;
363}
364
365static int __maybe_unused lis3lv02d_resume(struct device *dev)
366{
367 lis3lv02d_poweron(&lis3_dev);
368 return 0;
369}
370
371static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
372
373/* For the HP MDPS aka 3D Driveguard */
374static struct platform_driver lis3lv02d_driver = {
375 .probe = lis3lv02d_probe,
376 .remove = lis3lv02d_remove,
377 .driver = {
378 .name = "hp_accel",
379 .pm = &hp_accel_pm,
380 .acpi_match_table = lis3lv02d_device_ids,
381 },
382};
383module_platform_driver(lis3lv02d_driver);
384
385MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
386MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
387MODULE_LICENSE("GPL");