1 /*
2 * hp_accel.c - Interface between LIS3LV02DL driver and HP ACPI BIOS
3 *
4 * Copyright (C) 2007-2008 Yan Burman
5 * Copyright (C) 2008 Eric Piel
6 * Copyright (C) 2008-2009 Pavel Machek
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24
25 #include <linux/kernel.h>
26 #include <linux/init.h>
27 #include <linux/dmi.h>
28 #include <linux/module.h>
29 #include <linux/types.h>
30 #include <linux/platform_device.h>
31 #include <linux/interrupt.h>
32 #include <linux/delay.h>
33 #include <linux/wait.h>
34 #include <linux/poll.h>
35 #include <linux/freezer.h>
36 #include <linux/uaccess.h>
37 #include <linux/leds.h>
38 #include <linux/atomic.h>
39 #include <acpi/acpi_drivers.h>
40 #include "../../misc/lis3lv02d/lis3lv02d.h"
41
42 #define DRIVER_NAME "hp_accel"
43 #define ACPI_MDPS_CLASS "accelerometer"
44
45 /* Delayed LEDs infrastructure ------------------------------------ */
46
47 /* Special LED class that can defer work */
48 struct delayed_led_classdev {
49 struct led_classdev led_classdev;
50 struct work_struct work;
51 enum led_brightness new_brightness;
52
53 unsigned int led; /* For driver */
54 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
55 };
56
delayed_set_status_worker(struct work_struct * work)57 static inline void delayed_set_status_worker(struct work_struct *work)
58 {
59 struct delayed_led_classdev *data =
60 container_of(work, struct delayed_led_classdev, work);
61
62 data->set_brightness(data, data->new_brightness);
63 }
64
delayed_sysfs_set(struct led_classdev * led_cdev,enum led_brightness brightness)65 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
66 enum led_brightness brightness)
67 {
68 struct delayed_led_classdev *data = container_of(led_cdev,
69 struct delayed_led_classdev, led_classdev);
70 data->new_brightness = brightness;
71 schedule_work(&data->work);
72 }
73
74 /* HP-specific accelerometer driver ------------------------------------ */
75
76 /* For automatic insertion of the module */
77 static struct acpi_device_id lis3lv02d_device_ids[] = {
78 {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
79 {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
80 {"", 0},
81 };
82 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
83
84
85 /**
86 * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
87 * @lis3: pointer to the device struct
88 *
89 * Returns 0 on success.
90 */
lis3lv02d_acpi_init(struct lis3lv02d * lis3)91 int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
92 {
93 struct acpi_device *dev = lis3->bus_priv;
94 if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
95 NULL, NULL) != AE_OK)
96 return -EINVAL;
97
98 return 0;
99 }
100
101 /**
102 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
103 * @lis3: pointer to the device struct
104 * @reg: the register to read
105 * @ret: result of the operation
106 *
107 * Returns 0 on success.
108 */
lis3lv02d_acpi_read(struct lis3lv02d * lis3,int reg,u8 * ret)109 int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
110 {
111 struct acpi_device *dev = lis3->bus_priv;
112 union acpi_object arg0 = { ACPI_TYPE_INTEGER };
113 struct acpi_object_list args = { 1, &arg0 };
114 unsigned long long lret;
115 acpi_status status;
116
117 arg0.integer.value = reg;
118
119 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
120 *ret = lret;
121 return (status != AE_OK) ? -EINVAL : 0;
122 }
123
124 /**
125 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
126 * @lis3: pointer to the device struct
127 * @reg: the register to write to
128 * @val: the value to write
129 *
130 * Returns 0 on success.
131 */
lis3lv02d_acpi_write(struct lis3lv02d * lis3,int reg,u8 val)132 int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
133 {
134 struct acpi_device *dev = lis3->bus_priv;
135 unsigned long long ret; /* Not used when writting */
136 union acpi_object in_obj[2];
137 struct acpi_object_list args = { 2, in_obj };
138
139 in_obj[0].type = ACPI_TYPE_INTEGER;
140 in_obj[0].integer.value = reg;
141 in_obj[1].type = ACPI_TYPE_INTEGER;
142 in_obj[1].integer.value = val;
143
144 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
145 return -EINVAL;
146
147 return 0;
148 }
149
lis3lv02d_dmi_matched(const struct dmi_system_id * dmi)150 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
151 {
152 lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
153 pr_info("hardware type %s found\n", dmi->ident);
154
155 return 1;
156 }
157
158 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
159 * If the value is negative, the opposite of the hw value is used. */
160 #define DEFINE_CONV(name, x, y, z) \
161 static union axis_conversion lis3lv02d_axis_##name = \
162 { .as_array = { x, y, z } }
163 DEFINE_CONV(normal, 1, 2, 3);
164 DEFINE_CONV(y_inverted, 1, -2, 3);
165 DEFINE_CONV(x_inverted, -1, 2, 3);
166 DEFINE_CONV(z_inverted, 1, 2, -3);
167 DEFINE_CONV(xy_swap, 2, 1, 3);
168 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
169 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
170 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
171 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
172 DEFINE_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 }
194 static 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("HPB442x", "HP ProBook 442", xy_rotated_left),
230 AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
231 AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
232 AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
233 AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
234 AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
235 AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
236 AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
237 AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
238 AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
239 { NULL, }
240 /* Laptop models without axis info (yet):
241 * "NC6910" "HP Compaq 6910"
242 * "NC2400" "HP Compaq nc2400"
243 * "NX74x0" "HP Compaq nx74"
244 * "NX6325" "HP Compaq nx6325"
245 * "NC4400" "HP Compaq nc4400"
246 */
247 };
248
hpled_set(struct delayed_led_classdev * led_cdev,enum led_brightness value)249 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
250 {
251 struct acpi_device *dev = lis3_dev.bus_priv;
252 unsigned long long ret; /* Not used when writing */
253 union acpi_object in_obj[1];
254 struct acpi_object_list args = { 1, in_obj };
255
256 in_obj[0].type = ACPI_TYPE_INTEGER;
257 in_obj[0].integer.value = !!value;
258
259 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
260 }
261
262 static struct delayed_led_classdev hpled_led = {
263 .led_classdev = {
264 .name = "hp::hddprotect",
265 .default_trigger = "none",
266 .brightness_set = delayed_sysfs_set,
267 .flags = LED_CORE_SUSPENDRESUME,
268 },
269 .set_brightness = hpled_set,
270 };
271
272 static acpi_status
lis3lv02d_get_resource(struct acpi_resource * resource,void * context)273 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
274 {
275 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
276 struct acpi_resource_extended_irq *irq;
277 u32 *device_irq = context;
278
279 irq = &resource->data.extended_irq;
280 *device_irq = irq->interrupts[0];
281 }
282
283 return AE_OK;
284 }
285
lis3lv02d_enum_resources(struct acpi_device * device)286 static void lis3lv02d_enum_resources(struct acpi_device *device)
287 {
288 acpi_status status;
289
290 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
291 lis3lv02d_get_resource, &lis3_dev.irq);
292 if (ACPI_FAILURE(status))
293 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
294 }
295
lis3lv02d_add(struct acpi_device * device)296 static int lis3lv02d_add(struct acpi_device *device)
297 {
298 int ret;
299
300 if (!device)
301 return -EINVAL;
302
303 lis3_dev.bus_priv = device;
304 lis3_dev.init = lis3lv02d_acpi_init;
305 lis3_dev.read = lis3lv02d_acpi_read;
306 lis3_dev.write = lis3lv02d_acpi_write;
307 strcpy(acpi_device_name(device), DRIVER_NAME);
308 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
309 device->driver_data = &lis3_dev;
310
311 /* obtain IRQ number of our device from ACPI */
312 lis3lv02d_enum_resources(device);
313
314 /* If possible use a "standard" axes order */
315 if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
316 pr_info("Using custom axes %d,%d,%d\n",
317 lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
318 } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
319 pr_info("laptop model unknown, using default axes configuration\n");
320 lis3_dev.ac = lis3lv02d_axis_normal;
321 }
322
323 /* call the core layer do its init */
324 ret = lis3lv02d_init_device(&lis3_dev);
325 if (ret)
326 return ret;
327
328 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
329 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
330 if (ret) {
331 lis3lv02d_joystick_disable(&lis3_dev);
332 lis3lv02d_poweroff(&lis3_dev);
333 flush_work(&hpled_led.work);
334 return ret;
335 }
336
337 return ret;
338 }
339
lis3lv02d_remove(struct acpi_device * device)340 static int lis3lv02d_remove(struct acpi_device *device)
341 {
342 if (!device)
343 return -EINVAL;
344
345 lis3lv02d_joystick_disable(&lis3_dev);
346 lis3lv02d_poweroff(&lis3_dev);
347
348 led_classdev_unregister(&hpled_led.led_classdev);
349 flush_work(&hpled_led.work);
350
351 return lis3lv02d_remove_fs(&lis3_dev);
352 }
353
354
355 #ifdef CONFIG_PM_SLEEP
lis3lv02d_suspend(struct device * dev)356 static int lis3lv02d_suspend(struct device *dev)
357 {
358 /* make sure the device is off when we suspend */
359 lis3lv02d_poweroff(&lis3_dev);
360 return 0;
361 }
362
lis3lv02d_resume(struct device * dev)363 static int lis3lv02d_resume(struct device *dev)
364 {
365 lis3lv02d_poweron(&lis3_dev);
366 return 0;
367 }
368
369 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
370 #define HP_ACCEL_PM (&hp_accel_pm)
371 #else
372 #define HP_ACCEL_PM NULL
373 #endif
374
375 /* For the HP MDPS aka 3D Driveguard */
376 static struct acpi_driver lis3lv02d_driver = {
377 .name = DRIVER_NAME,
378 .class = ACPI_MDPS_CLASS,
379 .ids = lis3lv02d_device_ids,
380 .ops = {
381 .add = lis3lv02d_add,
382 .remove = lis3lv02d_remove,
383 },
384 .drv.pm = HP_ACCEL_PM,
385 };
386 module_acpi_driver(lis3lv02d_driver);
387
388 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
389 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
390 MODULE_LICENSE("GPL");
391