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Linux/drivers/platform/x86/hp_accel.c

  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 <linux/acpi.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 
 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 
 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         {"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
 81         {"", 0},
 82 };
 83 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
 84 
 85 
 86 /**
 87  * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
 88  * @lis3: pointer to the device struct
 89  *
 90  * Returns 0 on success.
 91  */
 92 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
 93 {
 94         struct acpi_device *dev = lis3->bus_priv;
 95         if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
 96                                  NULL, NULL) != AE_OK)
 97                 return -EINVAL;
 98 
 99         return 0;
100 }
101 
102 /**
103  * lis3lv02d_acpi_read - ACPI ALRD method: read a register
104  * @lis3: pointer to the device struct
105  * @reg:    the register to read
106  * @ret:    result of the operation
107  *
108  * Returns 0 on success.
109  */
110 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
111 {
112         struct acpi_device *dev = lis3->bus_priv;
113         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
114         struct acpi_object_list args = { 1, &arg0 };
115         unsigned long long lret;
116         acpi_status status;
117 
118         arg0.integer.value = reg;
119 
120         status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
121         *ret = lret;
122         return (status != AE_OK) ? -EINVAL : 0;
123 }
124 
125 /**
126  * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
127  * @lis3: pointer to the device struct
128  * @reg:    the register to write to
129  * @val:    the value to write
130  *
131  * Returns 0 on success.
132  */
133 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
134 {
135         struct acpi_device *dev = lis3->bus_priv;
136         unsigned long long ret; /* Not used when writting */
137         union acpi_object in_obj[2];
138         struct acpi_object_list args = { 2, in_obj };
139 
140         in_obj[0].type          = ACPI_TYPE_INTEGER;
141         in_obj[0].integer.value = reg;
142         in_obj[1].type          = ACPI_TYPE_INTEGER;
143         in_obj[1].integer.value = val;
144 
145         if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
146                 return -EINVAL;
147 
148         return 0;
149 }
150 
151 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
152 {
153         lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
154         pr_info("hardware type %s found\n", dmi->ident);
155 
156         return 1;
157 }
158 
159 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
160  * If the value is negative, the opposite of the hw value is used. */
161 #define DEFINE_CONV(name, x, y, z)                            \
162         static union axis_conversion lis3lv02d_axis_##name = \
163                 { .as_array = { x, y, z } }
164 DEFINE_CONV(normal, 1, 2, 3);
165 DEFINE_CONV(y_inverted, 1, -2, 3);
166 DEFINE_CONV(x_inverted, -1, 2, 3);
167 DEFINE_CONV(z_inverted, 1, 2, -3);
168 DEFINE_CONV(xy_swap, 2, 1, 3);
169 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
170 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
171 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
172 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
173 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
174 
175 #define AXIS_DMI_MATCH(_ident, _name, _axis) {          \
176         .ident = _ident,                                \
177         .callback = lis3lv02d_dmi_matched,              \
178         .matches = {                                    \
179                 DMI_MATCH(DMI_PRODUCT_NAME, _name)      \
180         },                                              \
181         .driver_data = &lis3lv02d_axis_##_axis          \
182 }
183 
184 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,        \
185                                 _class2, _name2,        \
186                                 _axis) {                \
187         .ident = _ident,                                \
188         .callback = lis3lv02d_dmi_matched,              \
189         .matches = {                                    \
190                 DMI_MATCH(DMI_##_class1, _name1),       \
191                 DMI_MATCH(DMI_##_class2, _name2),       \
192         },                                              \
193         .driver_data = &lis3lv02d_axis_##_axis          \
194 }
195 static struct dmi_system_id lis3lv02d_dmi_ids[] = {
196         /* product names are truncated to match all kinds of a same model */
197         AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
198         AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
199         AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
200         AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
201         AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
202         AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
203         AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
204         AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
205         AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
206         AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
207         AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
208         AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
209         AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
210         AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
211         AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
212         AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
213         AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
214         AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
215         AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
216         /* Intel-based HP Pavilion dv5 */
217         AXIS_DMI_MATCH2("HPDV5_I",
218                         PRODUCT_NAME, "HP Pavilion dv5",
219                         BOARD_NAME, "3603",
220                         x_inverted),
221         /* AMD-based HP Pavilion dv5 */
222         AXIS_DMI_MATCH2("HPDV5_A",
223                         PRODUCT_NAME, "HP Pavilion dv5",
224                         BOARD_NAME, "3600",
225                         y_inverted),
226         AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
227         AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
228         AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
229         AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
230         AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
231         AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
232         AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
233         AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
234         AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
235         AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
236         AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
237         AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
238         AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
239         AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
240         { NULL, }
241 /* Laptop models without axis info (yet):
242  * "NC6910" "HP Compaq 6910"
243  * "NC2400" "HP Compaq nc2400"
244  * "NX74x0" "HP Compaq nx74"
245  * "NX6325" "HP Compaq nx6325"
246  * "NC4400" "HP Compaq nc4400"
247  */
248 };
249 
250 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
251 {
252         struct acpi_device *dev = lis3_dev.bus_priv;
253         unsigned long long ret; /* Not used when writing */
254         union acpi_object in_obj[1];
255         struct acpi_object_list args = { 1, in_obj };
256 
257         in_obj[0].type          = ACPI_TYPE_INTEGER;
258         in_obj[0].integer.value = !!value;
259 
260         acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
261 }
262 
263 static struct delayed_led_classdev hpled_led = {
264         .led_classdev = {
265                 .name                   = "hp::hddprotect",
266                 .default_trigger        = "none",
267                 .brightness_set         = delayed_sysfs_set,
268                 .flags                  = LED_CORE_SUSPENDRESUME,
269         },
270         .set_brightness = hpled_set,
271 };
272 
273 static acpi_status
274 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
275 {
276         if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
277                 struct acpi_resource_extended_irq *irq;
278                 u32 *device_irq = context;
279 
280                 irq = &resource->data.extended_irq;
281                 *device_irq = irq->interrupts[0];
282         }
283 
284         return AE_OK;
285 }
286 
287 static void lis3lv02d_enum_resources(struct acpi_device *device)
288 {
289         acpi_status status;
290 
291         status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
292                                         lis3lv02d_get_resource, &lis3_dev.irq);
293         if (ACPI_FAILURE(status))
294                 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
295 }
296 
297 static int lis3lv02d_add(struct acpi_device *device)
298 {
299         int ret;
300 
301         if (!device)
302                 return -EINVAL;
303 
304         lis3_dev.bus_priv = device;
305         lis3_dev.init = lis3lv02d_acpi_init;
306         lis3_dev.read = lis3lv02d_acpi_read;
307         lis3_dev.write = lis3lv02d_acpi_write;
308         strcpy(acpi_device_name(device), DRIVER_NAME);
309         strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
310         device->driver_data = &lis3_dev;
311 
312         /* obtain IRQ number of our device from ACPI */
313         lis3lv02d_enum_resources(device);
314 
315         /* If possible use a "standard" axes order */
316         if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
317                 pr_info("Using custom axes %d,%d,%d\n",
318                         lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
319         } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
320                 pr_info("laptop model unknown, using default axes configuration\n");
321                 lis3_dev.ac = lis3lv02d_axis_normal;
322         }
323 
324         /* call the core layer do its init */
325         ret = lis3lv02d_init_device(&lis3_dev);
326         if (ret)
327                 return ret;
328 
329         INIT_WORK(&hpled_led.work, delayed_set_status_worker);
330         ret = led_classdev_register(NULL, &hpled_led.led_classdev);
331         if (ret) {
332                 lis3lv02d_joystick_disable(&lis3_dev);
333                 lis3lv02d_poweroff(&lis3_dev);
334                 flush_work(&hpled_led.work);
335                 return ret;
336         }
337 
338         return ret;
339 }
340 
341 static int lis3lv02d_remove(struct acpi_device *device)
342 {
343         if (!device)
344                 return -EINVAL;
345 
346         lis3lv02d_joystick_disable(&lis3_dev);
347         lis3lv02d_poweroff(&lis3_dev);
348 
349         led_classdev_unregister(&hpled_led.led_classdev);
350         flush_work(&hpled_led.work);
351 
352         return lis3lv02d_remove_fs(&lis3_dev);
353 }
354 
355 
356 #ifdef CONFIG_PM_SLEEP
357 static int lis3lv02d_suspend(struct device *dev)
358 {
359         /* make sure the device is off when we suspend */
360         lis3lv02d_poweroff(&lis3_dev);
361         return 0;
362 }
363 
364 static int lis3lv02d_resume(struct device *dev)
365 {
366         lis3lv02d_poweron(&lis3_dev);
367         return 0;
368 }
369 
370 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
371 #define HP_ACCEL_PM (&hp_accel_pm)
372 #else
373 #define HP_ACCEL_PM NULL
374 #endif
375 
376 /* For the HP MDPS aka 3D Driveguard */
377 static struct acpi_driver lis3lv02d_driver = {
378         .name  = DRIVER_NAME,
379         .class = ACPI_MDPS_CLASS,
380         .ids   = lis3lv02d_device_ids,
381         .ops = {
382                 .add     = lis3lv02d_add,
383                 .remove  = lis3lv02d_remove,
384         },
385         .drv.pm = HP_ACCEL_PM,
386 };
387 module_acpi_driver(lis3lv02d_driver);
388 
389 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
390 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
391 MODULE_LICENSE("GPL");
392 

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