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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 <linux/i8042.h>
 41 #include <linux/serio.h>
 42 #include "../../misc/lis3lv02d/lis3lv02d.h"
 43 
 44 #define DRIVER_NAME     "hp_accel"
 45 #define ACPI_MDPS_CLASS "accelerometer"
 46 
 47 /* Delayed LEDs infrastructure ------------------------------------ */
 48 
 49 /* Special LED class that can defer work */
 50 struct delayed_led_classdev {
 51         struct led_classdev led_classdev;
 52         struct work_struct work;
 53         enum led_brightness new_brightness;
 54 
 55         unsigned int led;               /* For driver */
 56         void (*set_brightness)(struct delayed_led_classdev *data, enum led_brightness value);
 57 };
 58 
 59 static inline void delayed_set_status_worker(struct work_struct *work)
 60 {
 61         struct delayed_led_classdev *data =
 62                         container_of(work, struct delayed_led_classdev, work);
 63 
 64         data->set_brightness(data, data->new_brightness);
 65 }
 66 
 67 static inline void delayed_sysfs_set(struct led_classdev *led_cdev,
 68                               enum led_brightness brightness)
 69 {
 70         struct delayed_led_classdev *data = container_of(led_cdev,
 71                              struct delayed_led_classdev, led_classdev);
 72         data->new_brightness = brightness;
 73         schedule_work(&data->work);
 74 }
 75 
 76 /* HP-specific accelerometer driver ------------------------------------ */
 77 
 78 /* e0 25, e0 26, e0 27, e0 28 are scan codes that the accelerometer with acpi id
 79  * HPQ6000 sends through the keyboard bus */
 80 #define ACCEL_1 0x25
 81 #define ACCEL_2 0x26
 82 #define ACCEL_3 0x27
 83 #define ACCEL_4 0x28
 84 
 85 /* For automatic insertion of the module */
 86 static const struct acpi_device_id lis3lv02d_device_ids[] = {
 87         {"HPQ0004", 0}, /* HP Mobile Data Protection System PNP */
 88         {"HPQ6000", 0}, /* HP Mobile Data Protection System PNP */
 89         {"HPQ6007", 0}, /* HP Mobile Data Protection System PNP */
 90         {"", 0},
 91 };
 92 MODULE_DEVICE_TABLE(acpi, lis3lv02d_device_ids);
 93 
 94 
 95 /**
 96  * lis3lv02d_acpi_init - ACPI _INI method: initialize the device.
 97  * @lis3: pointer to the device struct
 98  *
 99  * Returns 0 on success.
100  */
101 static int lis3lv02d_acpi_init(struct lis3lv02d *lis3)
102 {
103         struct acpi_device *dev = lis3->bus_priv;
104         if (acpi_evaluate_object(dev->handle, METHOD_NAME__INI,
105                                  NULL, NULL) != AE_OK)
106                 return -EINVAL;
107 
108         return 0;
109 }
110 
111 /**
112  * lis3lv02d_acpi_read - ACPI ALRD method: read a register
113  * @lis3: pointer to the device struct
114  * @reg:    the register to read
115  * @ret:    result of the operation
116  *
117  * Returns 0 on success.
118  */
119 static int lis3lv02d_acpi_read(struct lis3lv02d *lis3, int reg, u8 *ret)
120 {
121         struct acpi_device *dev = lis3->bus_priv;
122         union acpi_object arg0 = { ACPI_TYPE_INTEGER };
123         struct acpi_object_list args = { 1, &arg0 };
124         unsigned long long lret;
125         acpi_status status;
126 
127         arg0.integer.value = reg;
128 
129         status = acpi_evaluate_integer(dev->handle, "ALRD", &args, &lret);
130         *ret = lret;
131         return (status != AE_OK) ? -EINVAL : 0;
132 }
133 
134 /**
135  * lis3lv02d_acpi_write - ACPI ALWR method: write to a register
136  * @lis3: pointer to the device struct
137  * @reg:    the register to write to
138  * @val:    the value to write
139  *
140  * Returns 0 on success.
141  */
142 static int lis3lv02d_acpi_write(struct lis3lv02d *lis3, int reg, u8 val)
143 {
144         struct acpi_device *dev = lis3->bus_priv;
145         unsigned long long ret; /* Not used when writting */
146         union acpi_object in_obj[2];
147         struct acpi_object_list args = { 2, in_obj };
148 
149         in_obj[0].type          = ACPI_TYPE_INTEGER;
150         in_obj[0].integer.value = reg;
151         in_obj[1].type          = ACPI_TYPE_INTEGER;
152         in_obj[1].integer.value = val;
153 
154         if (acpi_evaluate_integer(dev->handle, "ALWR", &args, &ret) != AE_OK)
155                 return -EINVAL;
156 
157         return 0;
158 }
159 
160 static int lis3lv02d_dmi_matched(const struct dmi_system_id *dmi)
161 {
162         lis3_dev.ac = *((union axis_conversion *)dmi->driver_data);
163         pr_info("hardware type %s found\n", dmi->ident);
164 
165         return 1;
166 }
167 
168 /* Represents, for each axis seen by userspace, the corresponding hw axis (+1).
169  * If the value is negative, the opposite of the hw value is used. */
170 #define DEFINE_CONV(name, x, y, z)                            \
171         static union axis_conversion lis3lv02d_axis_##name = \
172                 { .as_array = { x, y, z } }
173 DEFINE_CONV(normal, 1, 2, 3);
174 DEFINE_CONV(y_inverted, 1, -2, 3);
175 DEFINE_CONV(x_inverted, -1, 2, 3);
176 DEFINE_CONV(z_inverted, 1, 2, -3);
177 DEFINE_CONV(xy_swap, 2, 1, 3);
178 DEFINE_CONV(xy_rotated_left, -2, 1, 3);
179 DEFINE_CONV(xy_rotated_left_usd, -2, 1, -3);
180 DEFINE_CONV(xy_swap_inverted, -2, -1, 3);
181 DEFINE_CONV(xy_rotated_right, 2, -1, 3);
182 DEFINE_CONV(xy_swap_yz_inverted, 2, -1, -3);
183 
184 #define AXIS_DMI_MATCH(_ident, _name, _axis) {          \
185         .ident = _ident,                                \
186         .callback = lis3lv02d_dmi_matched,              \
187         .matches = {                                    \
188                 DMI_MATCH(DMI_PRODUCT_NAME, _name)      \
189         },                                              \
190         .driver_data = &lis3lv02d_axis_##_axis          \
191 }
192 
193 #define AXIS_DMI_MATCH2(_ident, _class1, _name1,        \
194                                 _class2, _name2,        \
195                                 _axis) {                \
196         .ident = _ident,                                \
197         .callback = lis3lv02d_dmi_matched,              \
198         .matches = {                                    \
199                 DMI_MATCH(DMI_##_class1, _name1),       \
200                 DMI_MATCH(DMI_##_class2, _name2),       \
201         },                                              \
202         .driver_data = &lis3lv02d_axis_##_axis          \
203 }
204 static const struct dmi_system_id lis3lv02d_dmi_ids[] = {
205         /* product names are truncated to match all kinds of a same model */
206         AXIS_DMI_MATCH("NC64x0", "HP Compaq nc64", x_inverted),
207         AXIS_DMI_MATCH("NC84x0", "HP Compaq nc84", z_inverted),
208         AXIS_DMI_MATCH("NX9420", "HP Compaq nx9420", x_inverted),
209         AXIS_DMI_MATCH("NW9440", "HP Compaq nw9440", x_inverted),
210         AXIS_DMI_MATCH("NC2510", "HP Compaq 2510", y_inverted),
211         AXIS_DMI_MATCH("NC2710", "HP Compaq 2710", xy_swap),
212         AXIS_DMI_MATCH("NC8510", "HP Compaq 8510", xy_swap_inverted),
213         AXIS_DMI_MATCH("HP2133", "HP 2133", xy_rotated_left),
214         AXIS_DMI_MATCH("HP2140", "HP 2140", xy_swap_inverted),
215         AXIS_DMI_MATCH("NC653x", "HP Compaq 653", xy_rotated_left_usd),
216         AXIS_DMI_MATCH("NC6730b", "HP Compaq 6730b", xy_rotated_left_usd),
217         AXIS_DMI_MATCH("NC6730s", "HP Compaq 6730s", xy_swap),
218         AXIS_DMI_MATCH("NC651xx", "HP Compaq 651", xy_rotated_right),
219         AXIS_DMI_MATCH("NC6710x", "HP Compaq 6710", xy_swap_yz_inverted),
220         AXIS_DMI_MATCH("NC6715x", "HP Compaq 6715", y_inverted),
221         AXIS_DMI_MATCH("NC693xx", "HP EliteBook 693", xy_rotated_right),
222         AXIS_DMI_MATCH("NC693xx", "HP EliteBook 853", xy_swap),
223         AXIS_DMI_MATCH("NC854xx", "HP EliteBook 854", y_inverted),
224         AXIS_DMI_MATCH("NC273xx", "HP EliteBook 273", y_inverted),
225         /* Intel-based HP Pavilion dv5 */
226         AXIS_DMI_MATCH2("HPDV5_I",
227                         PRODUCT_NAME, "HP Pavilion dv5",
228                         BOARD_NAME, "3603",
229                         x_inverted),
230         /* AMD-based HP Pavilion dv5 */
231         AXIS_DMI_MATCH2("HPDV5_A",
232                         PRODUCT_NAME, "HP Pavilion dv5",
233                         BOARD_NAME, "3600",
234                         y_inverted),
235         AXIS_DMI_MATCH("DV7", "HP Pavilion dv7", x_inverted),
236         AXIS_DMI_MATCH("HP8710", "HP Compaq 8710", y_inverted),
237         AXIS_DMI_MATCH("HDX18", "HP HDX 18", x_inverted),
238         AXIS_DMI_MATCH("HPB432x", "HP ProBook 432", xy_rotated_left),
239         AXIS_DMI_MATCH("HPB442x", "HP ProBook 442", xy_rotated_left),
240         AXIS_DMI_MATCH("HPB452x", "HP ProBook 452", y_inverted),
241         AXIS_DMI_MATCH("HPB522x", "HP ProBook 522", xy_swap),
242         AXIS_DMI_MATCH("HPB532x", "HP ProBook 532", y_inverted),
243         AXIS_DMI_MATCH("HPB655x", "HP ProBook 655", xy_swap_inverted),
244         AXIS_DMI_MATCH("Mini510x", "HP Mini 510", xy_rotated_left_usd),
245         AXIS_DMI_MATCH("HPB63xx", "HP ProBook 63", xy_swap),
246         AXIS_DMI_MATCH("HPB64xx", "HP ProBook 64", xy_swap),
247         AXIS_DMI_MATCH("HPB64xx", "HP EliteBook 84", xy_swap),
248         AXIS_DMI_MATCH("HPB65xx", "HP ProBook 65", x_inverted),
249         { NULL, }
250 /* Laptop models without axis info (yet):
251  * "NC6910" "HP Compaq 6910"
252  * "NC2400" "HP Compaq nc2400"
253  * "NX74x0" "HP Compaq nx74"
254  * "NX6325" "HP Compaq nx6325"
255  * "NC4400" "HP Compaq nc4400"
256  */
257 };
258 
259 static void hpled_set(struct delayed_led_classdev *led_cdev, enum led_brightness value)
260 {
261         struct acpi_device *dev = lis3_dev.bus_priv;
262         unsigned long long ret; /* Not used when writing */
263         union acpi_object in_obj[1];
264         struct acpi_object_list args = { 1, in_obj };
265 
266         in_obj[0].type          = ACPI_TYPE_INTEGER;
267         in_obj[0].integer.value = !!value;
268 
269         acpi_evaluate_integer(dev->handle, "ALED", &args, &ret);
270 }
271 
272 static struct delayed_led_classdev hpled_led = {
273         .led_classdev = {
274                 .name                   = "hp::hddprotect",
275                 .default_trigger        = "none",
276                 .brightness_set         = delayed_sysfs_set,
277                 .flags                  = LED_CORE_SUSPENDRESUME,
278         },
279         .set_brightness = hpled_set,
280 };
281 
282 static acpi_status
283 lis3lv02d_get_resource(struct acpi_resource *resource, void *context)
284 {
285         if (resource->type == ACPI_RESOURCE_TYPE_EXTENDED_IRQ) {
286                 struct acpi_resource_extended_irq *irq;
287                 u32 *device_irq = context;
288 
289                 irq = &resource->data.extended_irq;
290                 *device_irq = irq->interrupts[0];
291         }
292 
293         return AE_OK;
294 }
295 
296 static void lis3lv02d_enum_resources(struct acpi_device *device)
297 {
298         acpi_status status;
299 
300         status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
301                                         lis3lv02d_get_resource, &lis3_dev.irq);
302         if (ACPI_FAILURE(status))
303                 printk(KERN_DEBUG DRIVER_NAME ": Error getting resources\n");
304 }
305 
306 static bool hp_accel_i8042_filter(unsigned char data, unsigned char str,
307                                   struct serio *port)
308 {
309         static bool extended;
310 
311         if (str & I8042_STR_AUXDATA)
312                 return false;
313 
314         if (data == 0xe0) {
315                 extended = true;
316                 return true;
317         } else if (unlikely(extended)) {
318                 extended = false;
319 
320                 switch (data) {
321                 case ACCEL_1:
322                 case ACCEL_2:
323                 case ACCEL_3:
324                 case ACCEL_4:
325                         return true;
326                 default:
327                         serio_interrupt(port, 0xe0, 0);
328                         return false;
329                 }
330         }
331 
332         return false;
333 }
334 
335 static int lis3lv02d_add(struct acpi_device *device)
336 {
337         int ret;
338 
339         if (!device)
340                 return -EINVAL;
341 
342         lis3_dev.bus_priv = device;
343         lis3_dev.init = lis3lv02d_acpi_init;
344         lis3_dev.read = lis3lv02d_acpi_read;
345         lis3_dev.write = lis3lv02d_acpi_write;
346         strcpy(acpi_device_name(device), DRIVER_NAME);
347         strcpy(acpi_device_class(device), ACPI_MDPS_CLASS);
348         device->driver_data = &lis3_dev;
349 
350         /* obtain IRQ number of our device from ACPI */
351         lis3lv02d_enum_resources(device);
352 
353         /* If possible use a "standard" axes order */
354         if (lis3_dev.ac.x && lis3_dev.ac.y && lis3_dev.ac.z) {
355                 pr_info("Using custom axes %d,%d,%d\n",
356                         lis3_dev.ac.x, lis3_dev.ac.y, lis3_dev.ac.z);
357         } else if (dmi_check_system(lis3lv02d_dmi_ids) == 0) {
358                 pr_info("laptop model unknown, using default axes configuration\n");
359                 lis3_dev.ac = lis3lv02d_axis_normal;
360         }
361 
362         /* call the core layer do its init */
363         ret = lis3lv02d_init_device(&lis3_dev);
364         if (ret)
365                 return ret;
366 
367         /* filter to remove HPQ6000 accelerometer data
368          * from keyboard bus stream */
369         if (strstr(dev_name(&device->dev), "HPQ6000"))
370                 i8042_install_filter(hp_accel_i8042_filter);
371 
372         INIT_WORK(&hpled_led.work, delayed_set_status_worker);
373         ret = led_classdev_register(NULL, &hpled_led.led_classdev);
374         if (ret) {
375                 lis3lv02d_joystick_disable(&lis3_dev);
376                 lis3lv02d_poweroff(&lis3_dev);
377                 flush_work(&hpled_led.work);
378                 return ret;
379         }
380 
381         return ret;
382 }
383 
384 static int lis3lv02d_remove(struct acpi_device *device)
385 {
386         if (!device)
387                 return -EINVAL;
388 
389         i8042_remove_filter(hp_accel_i8042_filter);
390         lis3lv02d_joystick_disable(&lis3_dev);
391         lis3lv02d_poweroff(&lis3_dev);
392 
393         led_classdev_unregister(&hpled_led.led_classdev);
394         flush_work(&hpled_led.work);
395 
396         return lis3lv02d_remove_fs(&lis3_dev);
397 }
398 
399 
400 #ifdef CONFIG_PM_SLEEP
401 static int lis3lv02d_suspend(struct device *dev)
402 {
403         /* make sure the device is off when we suspend */
404         lis3lv02d_poweroff(&lis3_dev);
405         return 0;
406 }
407 
408 static int lis3lv02d_resume(struct device *dev)
409 {
410         lis3lv02d_poweron(&lis3_dev);
411         return 0;
412 }
413 
414 static SIMPLE_DEV_PM_OPS(hp_accel_pm, lis3lv02d_suspend, lis3lv02d_resume);
415 #define HP_ACCEL_PM (&hp_accel_pm)
416 #else
417 #define HP_ACCEL_PM NULL
418 #endif
419 
420 /* For the HP MDPS aka 3D Driveguard */
421 static struct acpi_driver lis3lv02d_driver = {
422         .name  = DRIVER_NAME,
423         .class = ACPI_MDPS_CLASS,
424         .ids   = lis3lv02d_device_ids,
425         .ops = {
426                 .add     = lis3lv02d_add,
427                 .remove  = lis3lv02d_remove,
428         },
429         .drv.pm = HP_ACCEL_PM,
430 };
431 module_acpi_driver(lis3lv02d_driver);
432 
433 MODULE_DESCRIPTION("Glue between LIS3LV02Dx and HP ACPI BIOS and support for disk protection LED.");
434 MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
435 MODULE_LICENSE("GPL");
436 

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