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cfce41a6 EP |
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 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 | #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> | |
30 | #include <linux/input.h> | |
31 | #include <linux/kthread.h> | |
32 | #include <linux/semaphore.h> | |
33 | #include <linux/delay.h> | |
34 | #include <linux/wait.h> | |
35 | #include <linux/poll.h> | |
36 | #include <linux/freezer.h> | |
37 | #include <linux/version.h> | |
38 | #include <linux/uaccess.h> | |
9e0c7978 | 39 | #include <linux/leds.h> |
cfce41a6 EP |
40 | #include <acpi/acpi_drivers.h> |
41 | #include <asm/atomic.h> | |
42 | #include "lis3lv02d.h" | |
43 | ||
44 | #define DRIVER_NAME "lis3lv02d" | |
45 | #define ACPI_MDPS_CLASS "accelerometer" | |
46 | ||
47 | ||
48 | /* For automatic insertion of the module */ | |
49 | static struct acpi_device_id lis3lv02d_device_ids[] = { | |
50 | {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */ | |
51 | {"", 0}, | |
52 | }; | |
53 | MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids); | |
54 | ||
55 | ||
56 | /** | |
57 | * lis3lv02d_acpi_init - ACPI _INI method: initialize the device. | |
58 | * @handle: the handle of the device | |
59 | * | |
60 | * Returns AE_OK on success. | |
61 | */ | |
62 | acpi_status lis3lv02d_acpi_init(acpi_handle handle) | |
63 | { | |
64 | return acpi_evaluate_object(handle, METHOD_NAME__INI, NULL, NULL); | |
65 | } | |
66 | ||
67 | /** | |
68 | * lis3lv02d_acpi_read - ACPI ALRD method: read a register | |
69 | * @handle: the handle of the device | |
70 | * @reg: the register to read | |
71 | * @ret: result of the operation | |
72 | * | |
73 | * Returns AE_OK on success. | |
74 | */ | |
75 | acpi_status lis3lv02d_acpi_read(acpi_handle handle, int reg, u8 *ret) | |
76 | { | |
77 | union acpi_object arg0 = { ACPI_TYPE_INTEGER }; | |
78 | struct acpi_object_list args = { 1, &arg0 }; | |
79 | unsigned long long lret; | |
80 | acpi_status status; | |
81 | ||
82 | arg0.integer.value = reg; | |
83 | ||
84 | status = acpi_evaluate_integer(handle, "ALRD", &args, &lret); | |
85 | *ret = lret; | |
86 | return status; | |
87 | } | |
88 | ||
89 | /** | |
90 | * lis3lv02d_acpi_write - ACPI ALWR method: write to a register | |
91 | * @handle: the handle of the device | |
92 | * @reg: the register to write to | |
93 | * @val: the value to write | |
94 | * | |
95 | * Returns AE_OK on success. | |
96 | */ | |
97 | acpi_status lis3lv02d_acpi_write(acpi_handle handle, int reg, u8 val) | |
98 | { | |
99 | unsigned long long ret; /* Not used when writting */ | |
100 | union acpi_object in_obj[2]; | |
101 | struct acpi_object_list args = { 2, in_obj }; | |
102 | ||
103 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
104 | in_obj[0].integer.value = reg; | |
105 | in_obj[1].type = ACPI_TYPE_INTEGER; | |
106 | in_obj[1].integer.value = val; | |
107 | ||
108 | return acpi_evaluate_integer(handle, "ALWR", &args, &ret); | |
109 | } | |
110 | ||
111 | static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi) | |
112 | { | |
113 | adev.ac = *((struct axis_conversion *)dmi->driver_data); | |
114 | printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident); | |
115 | ||
116 | return 1; | |
117 | } | |
118 | ||
119 | /* Represents, for each axis seen by userspace, the corresponding hw axis (+1). | |
120 | * If the value is negative, the opposite of the hw value is used. */ | |
121 | static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3}; | |
122 | static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3}; | |
123 | static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3}; | |
124 | static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3}; | |
125 | static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3}; | |
126 | static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3}; | |
127 | ||
128 | #define AXIS_DMI_MATCH(_ident, _name, _axis) { \ | |
129 | .ident = _ident, \ | |
130 | .callback = lis3lv02d_dmi_matched, \ | |
131 | .matches = { \ | |
132 | DMI_MATCH(DMI_PRODUCT_NAME, _name) \ | |
133 | }, \ | |
134 | .driver_data = &lis3lv02d_axis_##_axis \ | |
135 | } | |
136 | static struct dmi_system_id lis3lv02d_dmi_ids[] = { | |
137 | /* product names are truncated to match all kinds of a same model */ | |
138 | AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted), | |
139 | AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted), | |
140 | AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted), | |
141 | AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted), | |
142 | AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted), | |
143 | AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted), | |
144 | AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left), | |
145 | { NULL, } | |
146 | /* Laptop models without axis info (yet): | |
147 | * "NC651xx" "HP Compaq 651" | |
148 | * "NC671xx" "HP Compaq 671" | |
149 | * "NC6910" "HP Compaq 6910" | |
150 | * HP Compaq 8710x Notebook PC / Mobile Workstation | |
151 | * "NC2400" "HP Compaq nc2400" | |
152 | * "NX74x0" "HP Compaq nx74" | |
153 | * "NX6325" "HP Compaq nx6325" | |
154 | * "NC4400" "HP Compaq nc4400" | |
155 | */ | |
156 | }; | |
157 | ||
9e0c7978 EP |
158 | static acpi_status hpled_acpi_write(acpi_handle handle, int reg) |
159 | { | |
160 | unsigned long long ret; /* Not used when writing */ | |
161 | union acpi_object in_obj[1]; | |
162 | struct acpi_object_list args = { 1, in_obj }; | |
163 | ||
164 | in_obj[0].type = ACPI_TYPE_INTEGER; | |
165 | in_obj[0].integer.value = reg; | |
166 | ||
167 | return acpi_evaluate_integer(handle, "ALED", &args, &ret); | |
168 | } | |
169 | ||
170 | static void hpled_set(struct led_classdev *led_cdev, | |
171 | enum led_brightness value) | |
172 | { | |
173 | hpled_acpi_write(adev.device->handle, !!value); | |
174 | } | |
175 | ||
176 | static struct led_classdev hpled_led = { | |
177 | .name = "hp:red:hddprotection", | |
178 | .default_trigger = "none", | |
179 | .brightness_set = hpled_set, | |
180 | }; | |
cfce41a6 EP |
181 | |
182 | static int lis3lv02d_add(struct acpi_device *device) | |
183 | { | |
184 | u8 val; | |
9e0c7978 | 185 | int ret; |
cfce41a6 EP |
186 | |
187 | if (!device) | |
188 | return -EINVAL; | |
189 | ||
190 | adev.device = device; | |
191 | adev.init = lis3lv02d_acpi_init; | |
192 | adev.read = lis3lv02d_acpi_read; | |
193 | adev.write = lis3lv02d_acpi_write; | |
194 | strcpy(acpi_device_name(device), DRIVER_NAME); | |
195 | strcpy(acpi_device_class(device), ACPI_MDPS_CLASS); | |
196 | device->driver_data = &adev; | |
197 | ||
198 | lis3lv02d_acpi_read(device->handle, WHO_AM_I, &val); | |
199 | if ((val != LIS3LV02DL_ID) && (val != LIS302DL_ID)) { | |
200 | printk(KERN_ERR DRIVER_NAME | |
201 | ": Accelerometer chip not LIS3LV02D{L,Q}\n"); | |
202 | } | |
203 | ||
204 | /* If possible use a "standard" axes order */ | |
205 | if (dmi_check_system(lis3lv02d_dmi_ids) == 0) { | |
206 | printk(KERN_INFO DRIVER_NAME ": laptop model unknown, " | |
207 | "using default axes configuration\n"); | |
208 | adev.ac = lis3lv02d_axis_normal; | |
209 | } | |
210 | ||
9e0c7978 EP |
211 | ret = led_classdev_register(NULL, &hpled_led); |
212 | if (ret) | |
213 | return ret; | |
214 | ||
215 | ret = lis3lv02d_init_device(&adev); | |
216 | if (ret) { | |
217 | led_classdev_unregister(&hpled_led); | |
218 | return ret; | |
219 | } | |
220 | ||
221 | return ret; | |
cfce41a6 EP |
222 | } |
223 | ||
224 | static int lis3lv02d_remove(struct acpi_device *device, int type) | |
225 | { | |
226 | if (!device) | |
227 | return -EINVAL; | |
228 | ||
229 | lis3lv02d_joystick_disable(); | |
230 | lis3lv02d_poweroff(device->handle); | |
231 | ||
9e0c7978 EP |
232 | led_classdev_unregister(&hpled_led); |
233 | ||
cfce41a6 EP |
234 | return lis3lv02d_remove_fs(); |
235 | } | |
236 | ||
237 | ||
238 | #ifdef CONFIG_PM | |
239 | static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) | |
240 | { | |
241 | /* make sure the device is off when we suspend */ | |
242 | lis3lv02d_poweroff(device->handle); | |
9e0c7978 | 243 | led_classdev_suspend(&hpled_led); |
cfce41a6 EP |
244 | return 0; |
245 | } | |
246 | ||
247 | static int lis3lv02d_resume(struct acpi_device *device) | |
248 | { | |
249 | /* put back the device in the right state (ACPI might turn it on) */ | |
250 | mutex_lock(&adev.lock); | |
251 | if (adev.usage > 0) | |
252 | lis3lv02d_poweron(device->handle); | |
253 | else | |
254 | lis3lv02d_poweroff(device->handle); | |
255 | mutex_unlock(&adev.lock); | |
9e0c7978 | 256 | led_classdev_resume(&hpled_led); |
cfce41a6 EP |
257 | return 0; |
258 | } | |
259 | #else | |
260 | #define lis3lv02d_suspend NULL | |
261 | #define lis3lv02d_resume NULL | |
262 | #endif | |
263 | ||
264 | /* For the HP MDPS aka 3D Driveguard */ | |
265 | static struct acpi_driver lis3lv02d_driver = { | |
266 | .name = DRIVER_NAME, | |
267 | .class = ACPI_MDPS_CLASS, | |
268 | .ids = lis3lv02d_device_ids, | |
269 | .ops = { | |
270 | .add = lis3lv02d_add, | |
271 | .remove = lis3lv02d_remove, | |
272 | .suspend = lis3lv02d_suspend, | |
273 | .resume = lis3lv02d_resume, | |
274 | } | |
275 | }; | |
276 | ||
277 | static int __init lis3lv02d_init_module(void) | |
278 | { | |
279 | int ret; | |
280 | ||
281 | if (acpi_disabled) | |
282 | return -ENODEV; | |
283 | ||
284 | ret = acpi_bus_register_driver(&lis3lv02d_driver); | |
285 | if (ret < 0) | |
286 | return ret; | |
287 | ||
288 | printk(KERN_INFO DRIVER_NAME " driver loaded.\n"); | |
289 | ||
290 | return 0; | |
291 | } | |
292 | ||
293 | static void __exit lis3lv02d_exit_module(void) | |
294 | { | |
295 | acpi_bus_unregister_driver(&lis3lv02d_driver); | |
296 | } | |
297 | ||
9e0c7978 | 298 | MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED."); |
cfce41a6 EP |
299 | MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek"); |
300 | MODULE_LICENSE("GPL"); | |
301 | ||
302 | module_init(lis3lv02d_init_module); | |
303 | module_exit(lis3lv02d_exit_module); | |
304 |