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Eric Pielcfce41a2009-01-09 16:41:01 -08001/*
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
Pavel Machek9e1c9d82009-01-15 13:51:24 -08006 * Copyright (C) 2008-2009 Pavel Machek
Eric Pielcfce41a2009-01-09 16:41:01 -08007 *
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#include <linux/kernel.h>
24#include <linux/init.h>
25#include <linux/dmi.h>
26#include <linux/module.h>
27#include <linux/types.h>
28#include <linux/platform_device.h>
29#include <linux/interrupt.h>
Eric Pielcfce41a2009-01-09 16:41:01 -080030#include <linux/delay.h>
31#include <linux/wait.h>
32#include <linux/poll.h>
33#include <linux/freezer.h>
Eric Pielcfce41a2009-01-09 16:41:01 -080034#include <linux/uaccess.h>
Eric Piel9e0c7972009-01-15 13:51:23 -080035#include <linux/leds.h>
Eric Pielcfce41a2009-01-09 16:41:01 -080036#include <acpi/acpi_drivers.h>
37#include <asm/atomic.h>
38#include "lis3lv02d.h"
39
40#define DRIVER_NAME "lis3lv02d"
41#define ACPI_MDPS_CLASS "accelerometer"
42
Pavel Machek9e1c9d82009-01-15 13:51:24 -080043/* Delayed LEDs infrastructure ------------------------------------ */
44
45/* Special LED class that can defer work */
46struct delayed_led_classdev {
47 struct led_classdev led_classdev;
48 struct work_struct work;
49 enum led_brightness new_brightness;
50
51 unsigned int led; /* For driver */
52 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
53};
54
55static inline void delayed_set_status_worker(struct work_struct *work)
56{
57 struct delayed_led_classdev *data =
58 container_of(work, struct delayed_led_classdev, work);
59
60 data->set_brightness(data, data->new_brightness);
61}
62
63static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
64 enum led_brightness brightness)
65{
66 struct delayed_led_classdev *data = container_of(led_cdev,
67 struct delayed_led_classdev, led_classdev);
68 data->new_brightness = brightness;
69 schedule_work(&data->work);
70}
71
72/* HP-specific accelerometer driver ------------------------------------ */
Eric Pielcfce41a2009-01-09 16:41:01 -080073
74/* For automatic insertion of the module */
75static struct acpi_device_id lis3lv02d_device_ids[] = {
76 {"HPQ0004", 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.
Daniel Macka38da2e2009-03-31 15:24:32 -070084 * @lis3: pointer to the device struct
Eric Pielcfce41a2009-01-09 16:41:01 -080085 *
Daniel Macka38da2e2009-03-31 15:24:32 -070086 * Returns 0 on success.
Eric Pielcfce41a2009-01-09 16:41:01 -080087 */
Daniel Macka38da2e2009-03-31 15:24:32 -070088int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
Eric Pielcfce41a2009-01-09 16:41:01 -080089{
Daniel Macka38da2e2009-03-31 15:24:32 -070090 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;
Eric Pielcfce41a2009-01-09 16:41:01 -080096}
97
98/**
99 * lis3lv02d_acpi_read - ACPI ALRD method: read a register
Daniel Macka38da2e2009-03-31 15:24:32 -0700100 * @lis3: pointer to the device struct
Eric Pielcfce41a2009-01-09 16:41:01 -0800101 * @reg: the register to read
102 * @ret: result of the operation
103 *
Daniel Macka38da2e2009-03-31 15:24:32 -0700104 * Returns 0 on success.
Eric Pielcfce41a2009-01-09 16:41:01 -0800105 */
Daniel Macka38da2e2009-03-31 15:24:32 -0700106int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
Eric Pielcfce41a2009-01-09 16:41:01 -0800107{
Daniel Macka38da2e2009-03-31 15:24:32 -0700108 struct acpi_device *dev = lis3->bus_priv;
Eric Pielcfce41a2009-01-09 16:41:01 -0800109 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
Daniel Macka38da2e2009-03-31 15:24:32 -0700116 status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
Eric Pielcfce41a2009-01-09 16:41:01 -0800117 *ret = lret;
Daniel Macka38da2e2009-03-31 15:24:32 -0700118 return (status != AE_OK) ? -EINVAL : 0;
Eric Pielcfce41a2009-01-09 16:41:01 -0800119}
120
121/**
122 * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
Daniel Macka38da2e2009-03-31 15:24:32 -0700123 * @lis3: pointer to the device struct
Eric Pielcfce41a2009-01-09 16:41:01 -0800124 * @reg: the register to write to
125 * @val: the value to write
126 *
Daniel Macka38da2e2009-03-31 15:24:32 -0700127 * Returns 0 on success.
Eric Pielcfce41a2009-01-09 16:41:01 -0800128 */
Daniel Macka38da2e2009-03-31 15:24:32 -0700129int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
Eric Pielcfce41a2009-01-09 16:41:01 -0800130{
Daniel Macka38da2e2009-03-31 15:24:32 -0700131 struct acpi_device *dev = lis3->bus_priv;
Eric Pielcfce41a2009-01-09 16:41:01 -0800132 unsigned long long ret; /* Not used when writting */
133 union acpi_object in_obj[2];
134 struct acpi_object_list args = { 2, in_obj };
135
136 in_obj[0].type = ACPI_TYPE_INTEGER;
137 in_obj[0].integer.value = reg;
138 in_obj[1].type = ACPI_TYPE_INTEGER;
139 in_obj[1].integer.value = val;
140
Daniel Macka38da2e2009-03-31 15:24:32 -0700141 if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
142 return -EINVAL;
143
144 return 0;
Eric Pielcfce41a2009-01-09 16:41:01 -0800145}
146
147static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
148{
Pavel Machekbe84cfc2009-03-31 15:24:26 -0700149 lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data);
Eric Pielcfce41a2009-01-09 16:41:01 -0800150 printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
151
152 return 1;
153}
154
155/* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
156 * If the value is negative, the opposite of the hw value is used. */
157static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
158static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
159static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
160static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
Eric Piel00937162009-06-16 15:34:16 -0700161static struct axis_conversion lis3lv02d_axis_xy_swap = {2, 1, 3};
Eric Pielcfce41a2009-01-09 16:41:01 -0800162static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
Eric Piel80eda5f2009-02-04 15:12:11 -0800163static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3};
Eric Pielcfce41a2009-01-09 16:41:01 -0800164static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
Jiri Tersel6bfef2b2009-02-04 15:12:09 -0800165static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
Martin Kebert87357d22009-02-04 15:12:12 -0800166static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3};
Eric Pielcfce41a2009-01-09 16:41:01 -0800167
168#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
169 .ident = _ident, \
170 .callback = lis3lv02d_dmi_matched, \
171 .matches = { \
172 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
173 }, \
174 .driver_data = &lis3lv02d_axis_##_axis \
175}
Giuseppe Bilotta9ccf3b52009-02-18 14:48:25 -0800176
177#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
178 _class2, _name2, \
179 _axis) { \
180 .ident = _ident, \
181 .callback = lis3lv02d_dmi_matched, \
182 .matches = { \
183 DMI_MATCH(DMI_##_class1, _name1), \
184 DMI_MATCH(DMI_##_class2, _name2), \
185 }, \
186 .driver_data = &lis3lv02d_axis_##_axis \
187}
Eric Pielcfce41a2009-01-09 16:41:01 -0800188static struct dmi_system_id lis3lv02d_dmi_ids[] = {
189 /* product names are truncated to match all kinds of a same model */
190 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
191 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
192 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
193 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
194 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
Eric Piel00937162009-06-16 15:34:16 -0700195 AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
Eric Pielcfce41a2009-01-09 16:41:01 -0800196 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
197 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
Pavel Machek9d7639d2009-03-31 15:24:29 -0700198 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
Eric Piel80eda5f2009-02-04 15:12:11 -0800199 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
Pavel Herrmannc77a0222009-02-04 15:12:11 -0800200 AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
Jiri Tersel6bfef2b2009-02-04 15:12:09 -0800201 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
Eric Piel00937162009-06-16 15:34:16 -0700202 AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
203 AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
204 AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
Giuseppe Bilotta9ccf3b52009-02-18 14:48:25 -0800205 /* Intel-based HP Pavilion dv5 */
206 AXIS_DMI_MATCH2("HPDV5_I",
207 PRODUCT_NAME, "HP Pavilion dv5",
208 BOARD_NAME, "3603",
209 x_inverted),
210 /* AMD-based HP Pavilion dv5 */
211 AXIS_DMI_MATCH2("HPDV5_A",
212 PRODUCT_NAME, "HP Pavilion dv5",
213 BOARD_NAME, "3600",
214 y_inverted),
Pavel Machek9d7639d2009-03-31 15:24:29 -0700215 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
Luca Cappa12a324b2009-03-31 15:24:31 -0700216 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
Eric Pielcfce41a2009-01-09 16:41:01 -0800217 { NULL, }
218/* Laptop models without axis info (yet):
Eric Pielcfce41a2009-01-09 16:41:01 -0800219 * "NC6910" "HP Compaq 6910"
Eric Pielcfce41a2009-01-09 16:41:01 -0800220 * "NC2400" "HP Compaq nc2400"
221 * "NX74x0" "HP Compaq nx74"
222 * "NX6325" "HP Compaq nx6325"
223 * "NC4400" "HP Compaq nc4400"
224 */
225};
226
Pavel Machek9e1c9d82009-01-15 13:51:24 -0800227static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
Eric Piel9e0c7972009-01-15 13:51:23 -0800228{
Daniel Macka38da2e2009-03-31 15:24:32 -0700229 struct acpi_device *dev = lis3_dev.bus_priv;
Eric Piel9e0c7972009-01-15 13:51:23 -0800230 unsigned long long ret; /* Not used when writing */
231 union acpi_object in_obj[1];
232 struct acpi_object_list args = { 1, in_obj };
233
234 in_obj[0].type = ACPI_TYPE_INTEGER;
Pavel Machek9e1c9d82009-01-15 13:51:24 -0800235 in_obj[0].integer.value = !!value;
Eric Piel9e0c7972009-01-15 13:51:23 -0800236
Daniel Macka38da2e2009-03-31 15:24:32 -0700237 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
Eric Piel9e0c7972009-01-15 13:51:23 -0800238}
239
Pavel Machek9e1c9d82009-01-15 13:51:24 -0800240static struct delayed_led_classdev hpled_led = {
241 .led_classdev = {
242 .name = "hp::hddprotect",
243 .default_trigger = "none",
244 .brightness_set = delayed_sysfs_set,
245 .flags = LED_CORE_SUSPENDRESUME,
246 },
247 .set_brightness = hpled_set,
Eric Piel9e0c7972009-01-15 13:51:23 -0800248};
Eric Pielcfce41a2009-01-09 16:41:01 -0800249
Pavel Machekef2cfc72009-02-18 14:48:23 -0800250static acpi_status
251lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
252{
253 if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
254 struct acpi_resource_extended_irq *irq;
255 u32 *device_irq = context;
256
257 irq = &resource->data.extended_irq;
258 *device_irq = irq->interrupts[0];
259 }
260
261 return AE_OK;
262}
263
264static void lis3lv02d_enum_resources(struct acpi_device *device)
265{
266 acpi_status status;
267
268 status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
Pavel Machekbe84cfc2009-03-31 15:24:26 -0700269 lis3lv02d_get_resource, &lis3_dev.irq);
Pavel Machekef2cfc72009-02-18 14:48:23 -0800270 if (ACPI_FAILURE(status))
271 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
272}
273
Eric Pielcfce41a2009-01-09 16:41:01 -0800274static int lis3lv02d_add(struct acpi_device *device)
275{
Eric Piel9e0c7972009-01-15 13:51:23 -0800276 int ret;
Eric Pielcfce41a2009-01-09 16:41:01 -0800277
278 if (!device)
279 return -EINVAL;
280
Daniel Macka38da2e2009-03-31 15:24:32 -0700281 lis3_dev.bus_priv = device;
Pavel Machekbe84cfc2009-03-31 15:24:26 -0700282 lis3_dev.init = lis3lv02d_acpi_init;
283 lis3_dev.read = lis3lv02d_acpi_read;
284 lis3_dev.write = lis3lv02d_acpi_write;
Eric Pielcfce41a2009-01-09 16:41:01 -0800285 strcpy(acpi_device_name(device), DRIVER_NAME);
286 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
Pavel Machekbe84cfc2009-03-31 15:24:26 -0700287 device->driver_data = &lis3_dev;
Eric Pielcfce41a2009-01-09 16:41:01 -0800288
Daniel Macka38da2e2009-03-31 15:24:32 -0700289 /* obtain IRQ number of our device from ACPI */
290 lis3lv02d_enum_resources(device);
Eric Pielcfce41a2009-01-09 16:41:01 -0800291
292 /* If possible use a "standard" axes order */
293 if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
294 printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
295 "using default axes configuration\n");
Pavel Machekbe84cfc2009-03-31 15:24:26 -0700296 lis3_dev.ac = lis3lv02d_axis_normal;
Eric Pielcfce41a2009-01-09 16:41:01 -0800297 }
298
Daniel Macka38da2e2009-03-31 15:24:32 -0700299 /* call the core layer do its init */
300 ret = lis3lv02d_init_device(&lis3_dev);
Eric Piel9e0c7972009-01-15 13:51:23 -0800301 if (ret)
302 return ret;
303
Daniel Macka38da2e2009-03-31 15:24:32 -0700304 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
305 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
Eric Piel9e0c7972009-01-15 13:51:23 -0800306 if (ret) {
Daniel Macka38da2e2009-03-31 15:24:32 -0700307 lis3lv02d_joystick_disable();
308 lis3lv02d_poweroff(&lis3_dev);
Pavel Machek9e1c9d82009-01-15 13:51:24 -0800309 flush_work(&hpled_led.work);
Eric Piel9e0c7972009-01-15 13:51:23 -0800310 return ret;
311 }
312
313 return ret;
Eric Pielcfce41a2009-01-09 16:41:01 -0800314}
315
316static int lis3lv02d_remove(struct acpi_device *device, int type)
317{
318 if (!device)
319 return -EINVAL;
320
321 lis3lv02d_joystick_disable();
Daniel Macka38da2e2009-03-31 15:24:32 -0700322 lis3lv02d_poweroff(&lis3_dev);
Eric Pielcfce41a2009-01-09 16:41:01 -0800323
Pavel Machek9e1c9d82009-01-15 13:51:24 -0800324 flush_work(&hpled_led.work);
325 led_classdev_unregister(&hpled_led.led_classdev);
Eric Piel9e0c7972009-01-15 13:51:23 -0800326
Eric Piela002ee82009-06-16 15:34:14 -0700327 return lis3lv02d_remove_fs(&lis3_dev);
Eric Pielcfce41a2009-01-09 16:41:01 -0800328}
329
330
331#ifdef CONFIG_PM
332static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
333{
334 /* make sure the device is off when we suspend */
Daniel Macka38da2e2009-03-31 15:24:32 -0700335 lis3lv02d_poweroff(&lis3_dev);
Eric Pielcfce41a2009-01-09 16:41:01 -0800336 return 0;
337}
338
339static int lis3lv02d_resume(struct acpi_device *device)
340{
Eric Piela002ee82009-06-16 15:34:14 -0700341 lis3lv02d_poweron(&lis3_dev);
Eric Pielcfce41a2009-01-09 16:41:01 -0800342 return 0;
343}
344#else
345#define lis3lv02d_suspend NULL
346#define lis3lv02d_resume NULL
347#endif
348
349/* For the HP MDPS aka 3D Driveguard */
350static struct acpi_driver lis3lv02d_driver = {
351 .name = DRIVER_NAME,
352 .class = ACPI_MDPS_CLASS,
353 .ids = lis3lv02d_device_ids,
354 .ops = {
355 .add = lis3lv02d_add,
356 .remove = lis3lv02d_remove,
357 .suspend = lis3lv02d_suspend,
358 .resume = lis3lv02d_resume,
359 }
360};
361
362static int __init lis3lv02d_init_module(void)
363{
364 int ret;
365
366 if (acpi_disabled)
367 return -ENODEV;
368
369 ret = acpi_bus_register_driver(&lis3lv02d_driver);
370 if (ret < 0)
371 return ret;
372
373 printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
374
375 return 0;
376}
377
378static void __exit lis3lv02d_exit_module(void)
379{
380 acpi_bus_unregister_driver(&lis3lv02d_driver);
381}
382
Eric Piel9e0c7972009-01-15 13:51:23 -0800383MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
Eric Pielcfce41a2009-01-09 16:41:01 -0800384MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
385MODULE_LICENSE("GPL");
386
387module_init(lis3lv02d_init_module);
388module_exit(lis3lv02d_exit_module);
389