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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/uaccess.h>
38#include <linux/leds.h>
39#include <acpi/acpi_drivers.h>
40#include <asm/atomic.h>
41#include "lis3lv02d.h"
42
43#define DRIVER_NAME "lis3lv02d"
44#define ACPI_MDPS_CLASS "accelerometer"
45
46
47
48
49struct delayed_led_classdev {
50 struct led_classdev led_classdev;
51 struct work_struct work;
52 enum led_brightness new_brightness;
53
54 unsigned int led;
55 void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
56};
57
58static inline void delayed_set_status_worker(struct work_struct *work)
59{
60 struct delayed_led_classdev *data =
61 container_of(work, struct delayed_led_classdev, work);
62
63 data->set_brightness(data, data->new_brightness);
64}
65
66static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
67 enum led_brightness brightness)
68{
69 struct delayed_led_classdev *data = container_of(led_cdev,
70 struct delayed_led_classdev, led_classdev);
71 data->new_brightness = brightness;
72 schedule_work(&data->work);
73}
74
75
76
77
78static struct acpi_device_id lis3lv02d_device_ids[] = {
79 {"HPQ0004", 0},
80 {"", 0},
81};
82MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
83
84
85
86
87
88
89
90
91int 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
103
104
105
106
107
108
109int 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
126
127
128
129
130
131
132int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
133{
134 struct acpi_device *dev = lis3->bus_priv;
135 unsigned long long ret;
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
150static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
151{
152 lis3_dev.ac = *((struct axis_conversion *)dmi->driver_data);
153 printk(KERN_INFO DRIVER_NAME ": hardware type %s found.\n", dmi->ident);
154
155 return 1;
156}
157
158
159
160static struct axis_conversion lis3lv02d_axis_normal = {1, 2, 3};
161static struct axis_conversion lis3lv02d_axis_y_inverted = {1, -2, 3};
162static struct axis_conversion lis3lv02d_axis_x_inverted = {-1, 2, 3};
163static struct axis_conversion lis3lv02d_axis_z_inverted = {1, 2, -3};
164static struct axis_conversion lis3lv02d_axis_xy_rotated_left = {-2, 1, 3};
165static struct axis_conversion lis3lv02d_axis_xy_rotated_left_usd = {-2, 1, -3};
166static struct axis_conversion lis3lv02d_axis_xy_swap_inverted = {-2, -1, 3};
167static struct axis_conversion lis3lv02d_axis_xy_rotated_right = {2, -1, 3};
168static struct axis_conversion lis3lv02d_axis_xy_swap_yz_inverted = {2, -1, -3};
169
170#define AXIS_DMI_MATCH(_ident, _name, _axis) { \
171 .ident = _ident, \
172 .callback = lis3lv02d_dmi_matched, \
173 .matches = { \
174 DMI_MATCH(DMI_PRODUCT_NAME, _name) \
175 }, \
176 .driver_data = &lis3lv02d_axis_##_axis \
177}
178
179#define AXIS_DMI_MATCH2(_ident, _class1, _name1, \
180 _class2, _name2, \
181 _axis) { \
182 .ident = _ident, \
183 .callback = lis3lv02d_dmi_matched, \
184 .matches = { \
185 DMI_MATCH(DMI_##_class1, _name1), \
186 DMI_MATCH(DMI_##_class2, _name2), \
187 }, \
188 .driver_data = &lis3lv02d_axis_##_axis \
189}
190static struct dmi_system_id lis3lv02d_dmi_ids[] = {
191
192 AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
193 AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
194 AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
195 AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
196 AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
197 AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
198 AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
199 AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
200 AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
201 AXIS_DMI_MATCH("NC673x", "HP Compaq 673", xy_rotated_left_usd),
202 AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
203 AXIS_DMI_MATCH("NC671xx", "HP Compaq 671", xy_swap_yz_inverted),
204
205 AXIS_DMI_MATCH2("HPDV5_I",
206 PRODUCT_NAME, "HP Pavilion dv5",
207 BOARD_NAME, "3603",
208 x_inverted),
209
210 AXIS_DMI_MATCH2("HPDV5_A",
211 PRODUCT_NAME, "HP Pavilion dv5",
212 BOARD_NAME, "3600",
213 y_inverted),
214 AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
215 AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
216 { NULL, }
217
218
219
220
221
222
223
224
225};
226
227static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
228{
229 struct acpi_device *dev = lis3_dev.bus_priv;
230 unsigned long long ret;
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;
235 in_obj[0].integer.value = !!value;
236
237 acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
238}
239
240static 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,
248};
249
250static 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,
269 lis3lv02d_get_resource, &lis3_dev.irq);
270 if (ACPI_FAILURE(status))
271 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
272}
273
274static int lis3lv02d_add(struct acpi_device *device)
275{
276 int ret;
277
278 if (!device)
279 return -EINVAL;
280
281 lis3_dev.bus_priv = device;
282 lis3_dev.init = lis3lv02d_acpi_init;
283 lis3_dev.read = lis3lv02d_acpi_read;
284 lis3_dev.write = lis3lv02d_acpi_write;
285 strcpy(acpi_device_name(device), DRIVER_NAME);
286 strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
287 device->driver_data = &lis3_dev;
288
289
290 lis3lv02d_enum_resources(device);
291
292
293 if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
294 printk(KERN_INFO DRIVER_NAME ": laptop model unknown, "
295 "using default axes configuration\n");
296 lis3_dev.ac = lis3lv02d_axis_normal;
297 }
298
299
300 ret = lis3lv02d_init_device(&lis3_dev);
301 if (ret)
302 return ret;
303
304 INIT_WORK(&hpled_led.work, delayed_set_status_worker);
305 ret = led_classdev_register(NULL, &hpled_led.led_classdev);
306 if (ret) {
307 lis3lv02d_joystick_disable();
308 lis3lv02d_poweroff(&lis3_dev);
309 flush_work(&hpled_led.work);
310 return ret;
311 }
312
313 return ret;
314}
315
316static int lis3lv02d_remove(struct acpi_device *device, int type)
317{
318 if (!device)
319 return -EINVAL;
320
321 lis3lv02d_joystick_disable();
322 lis3lv02d_poweroff(&lis3_dev);
323
324 flush_work(&hpled_led.work);
325 led_classdev_unregister(&hpled_led.led_classdev);
326
327 return lis3lv02d_remove_fs();
328}
329
330
331#ifdef CONFIG_PM
332static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state)
333{
334
335 lis3lv02d_poweroff(&lis3_dev);
336 return 0;
337}
338
339static int lis3lv02d_resume(struct acpi_device *device)
340{
341
342 mutex_lock(&lis3_dev.lock);
343 if (lis3_dev.usage > 0)
344 lis3lv02d_poweron(&lis3_dev);
345 else
346 lis3lv02d_poweroff(&lis3_dev);
347 mutex_unlock(&lis3_dev.lock);
348 return 0;
349}
350#else
351#define lis3lv02d_suspend NULL
352#define lis3lv02d_resume NULL
353#endif
354
355
356static struct acpi_driver lis3lv02d_driver = {
357 .name = DRIVER_NAME,
358 .class = ACPI_MDPS_CLASS,
359 .ids = lis3lv02d_device_ids,
360 .ops = {
361 .add = lis3lv02d_add,
362 .remove = lis3lv02d_remove,
363 .suspend = lis3lv02d_suspend,
364 .resume = lis3lv02d_resume,
365 }
366};
367
368static int __init lis3lv02d_init_module(void)
369{
370 int ret;
371
372 if (acpi_disabled)
373 return -ENODEV;
374
375 ret = acpi_bus_register_driver(&lis3lv02d_driver);
376 if (ret < 0)
377 return ret;
378
379 printk(KERN_INFO DRIVER_NAME " driver loaded.\n");
380
381 return 0;
382}
383
384static void __exit lis3lv02d_exit_module(void)
385{
386 acpi_bus_unregister_driver(&lis3lv02d_driver);
387}
388
389MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
390MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
391MODULE_LICENSE("GPL");
392
393module_init(lis3lv02d_init_module);
394module_exit(lis3lv02d_exit_module);
395
396
