Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/platform/x86/ideapad-laptop.c

  1 /*
  2  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
  3  *
  4  *  Copyright © 2010 Intel Corporation
  5  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
  6  *
  7  *  This program is free software; you can redistribute it and/or modify
  8  *  it under the terms of the GNU General Public License as published by
  9  *  the Free Software Foundation; either version 2 of the License, or
 10  *  (at your option) any later version.
 11  *
 12  *  This program is distributed in the hope that it will be useful,
 13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 15  *  GNU General Public License for more details.
 16  *
 17  *  You should have received a copy of the GNU General Public License
 18  *  along with this program; if not, write to the Free Software
 19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 20  *  02110-1301, USA.
 21  */
 22 
 23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 24 
 25 #include <linux/kernel.h>
 26 #include <linux/module.h>
 27 #include <linux/init.h>
 28 #include <linux/types.h>
 29 #include <linux/acpi.h>
 30 #include <linux/rfkill.h>
 31 #include <linux/platform_device.h>
 32 #include <linux/input.h>
 33 #include <linux/input/sparse-keymap.h>
 34 #include <linux/backlight.h>
 35 #include <linux/fb.h>
 36 #include <linux/debugfs.h>
 37 #include <linux/seq_file.h>
 38 #include <linux/i8042.h>
 39 #include <linux/dmi.h>
 40 #include <linux/device.h>
 41 
 42 #define IDEAPAD_RFKILL_DEV_NUM  (3)
 43 
 44 #define CFG_BT_BIT      (16)
 45 #define CFG_3G_BIT      (17)
 46 #define CFG_WIFI_BIT    (18)
 47 #define CFG_CAMERA_BIT  (19)
 48 
 49 enum {
 50         VPCCMD_R_VPC1 = 0x10,
 51         VPCCMD_R_BL_MAX,
 52         VPCCMD_R_BL,
 53         VPCCMD_W_BL,
 54         VPCCMD_R_WIFI,
 55         VPCCMD_W_WIFI,
 56         VPCCMD_R_BT,
 57         VPCCMD_W_BT,
 58         VPCCMD_R_BL_POWER,
 59         VPCCMD_R_NOVO,
 60         VPCCMD_R_VPC2,
 61         VPCCMD_R_TOUCHPAD,
 62         VPCCMD_W_TOUCHPAD,
 63         VPCCMD_R_CAMERA,
 64         VPCCMD_W_CAMERA,
 65         VPCCMD_R_3G,
 66         VPCCMD_W_3G,
 67         VPCCMD_R_ODD, /* 0x21 */
 68         VPCCMD_W_FAN,
 69         VPCCMD_R_RF,
 70         VPCCMD_W_RF,
 71         VPCCMD_R_FAN = 0x2B,
 72         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
 73         VPCCMD_W_BL_POWER = 0x33,
 74 };
 75 
 76 struct ideapad_rfk_priv {
 77         int dev;
 78         struct ideapad_private *priv;
 79 };
 80 
 81 struct ideapad_private {
 82         struct acpi_device *adev;
 83         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
 84         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
 85         struct platform_device *platform_device;
 86         struct input_dev *inputdev;
 87         struct backlight_device *blightdev;
 88         struct dentry *debug;
 89         unsigned long cfg;
 90 };
 91 
 92 static bool no_bt_rfkill;
 93 module_param(no_bt_rfkill, bool, 0444);
 94 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 95 
 96 /*
 97  * ACPI Helpers
 98  */
 99 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
100 
101 static int read_method_int(acpi_handle handle, const char *method, int *val)
102 {
103         acpi_status status;
104         unsigned long long result;
105 
106         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
107         if (ACPI_FAILURE(status)) {
108                 *val = -1;
109                 return -1;
110         } else {
111                 *val = result;
112                 return 0;
113         }
114 }
115 
116 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
117 {
118         acpi_status status;
119         unsigned long long result;
120         struct acpi_object_list params;
121         union acpi_object in_obj;
122 
123         params.count = 1;
124         params.pointer = &in_obj;
125         in_obj.type = ACPI_TYPE_INTEGER;
126         in_obj.integer.value = cmd;
127 
128         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
129 
130         if (ACPI_FAILURE(status)) {
131                 *ret = -1;
132                 return -1;
133         } else {
134                 *ret = result;
135                 return 0;
136         }
137 }
138 
139 static int method_vpcw(acpi_handle handle, int cmd, int data)
140 {
141         struct acpi_object_list params;
142         union acpi_object in_obj[2];
143         acpi_status status;
144 
145         params.count = 2;
146         params.pointer = in_obj;
147         in_obj[0].type = ACPI_TYPE_INTEGER;
148         in_obj[0].integer.value = cmd;
149         in_obj[1].type = ACPI_TYPE_INTEGER;
150         in_obj[1].integer.value = data;
151 
152         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
153         if (status != AE_OK)
154                 return -1;
155         return 0;
156 }
157 
158 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
159 {
160         int val;
161         unsigned long int end_jiffies;
162 
163         if (method_vpcw(handle, 1, cmd))
164                 return -1;
165 
166         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
167              time_before(jiffies, end_jiffies);) {
168                 schedule();
169                 if (method_vpcr(handle, 1, &val))
170                         return -1;
171                 if (val == 0) {
172                         if (method_vpcr(handle, 0, &val))
173                                 return -1;
174                         *data = val;
175                         return 0;
176                 }
177         }
178         pr_err("timeout in read_ec_cmd\n");
179         return -1;
180 }
181 
182 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
183 {
184         int val;
185         unsigned long int end_jiffies;
186 
187         if (method_vpcw(handle, 0, data))
188                 return -1;
189         if (method_vpcw(handle, 1, cmd))
190                 return -1;
191 
192         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
193              time_before(jiffies, end_jiffies);) {
194                 schedule();
195                 if (method_vpcr(handle, 1, &val))
196                         return -1;
197                 if (val == 0)
198                         return 0;
199         }
200         pr_err("timeout in write_ec_cmd\n");
201         return -1;
202 }
203 
204 /*
205  * debugfs
206  */
207 static int debugfs_status_show(struct seq_file *s, void *data)
208 {
209         struct ideapad_private *priv = s->private;
210         unsigned long value;
211 
212         if (!priv)
213                 return -EINVAL;
214 
215         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
216                 seq_printf(s, "Backlight max:\t%lu\n", value);
217         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
218                 seq_printf(s, "Backlight now:\t%lu\n", value);
219         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
220                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
221         seq_printf(s, "=====================\n");
222 
223         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
224                 seq_printf(s, "Radio status:\t%s(%lu)\n",
225                            value ? "On" : "Off", value);
226         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
227                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
228                            value ? "On" : "Off", value);
229         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
230                 seq_printf(s, "BT status:\t%s(%lu)\n",
231                            value ? "On" : "Off", value);
232         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
233                 seq_printf(s, "3G status:\t%s(%lu)\n",
234                            value ? "On" : "Off", value);
235         seq_printf(s, "=====================\n");
236 
237         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
238                 seq_printf(s, "Touchpad status:%s(%lu)\n",
239                            value ? "On" : "Off", value);
240         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
241                 seq_printf(s, "Camera status:\t%s(%lu)\n",
242                            value ? "On" : "Off", value);
243 
244         return 0;
245 }
246 
247 static int debugfs_status_open(struct inode *inode, struct file *file)
248 {
249         return single_open(file, debugfs_status_show, inode->i_private);
250 }
251 
252 static const struct file_operations debugfs_status_fops = {
253         .owner = THIS_MODULE,
254         .open = debugfs_status_open,
255         .read = seq_read,
256         .llseek = seq_lseek,
257         .release = single_release,
258 };
259 
260 static int debugfs_cfg_show(struct seq_file *s, void *data)
261 {
262         struct ideapad_private *priv = s->private;
263 
264         if (!priv) {
265                 seq_printf(s, "cfg: N/A\n");
266         } else {
267                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
268                            priv->cfg);
269                 if (test_bit(CFG_BT_BIT, &priv->cfg))
270                         seq_printf(s, "Bluetooth ");
271                 if (test_bit(CFG_3G_BIT, &priv->cfg))
272                         seq_printf(s, "3G ");
273                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
274                         seq_printf(s, "Wireless ");
275                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
276                         seq_printf(s, "Camera ");
277                 seq_printf(s, "\nGraphic: ");
278                 switch ((priv->cfg)&0x700) {
279                 case 0x100:
280                         seq_printf(s, "Intel");
281                         break;
282                 case 0x200:
283                         seq_printf(s, "ATI");
284                         break;
285                 case 0x300:
286                         seq_printf(s, "Nvidia");
287                         break;
288                 case 0x400:
289                         seq_printf(s, "Intel and ATI");
290                         break;
291                 case 0x500:
292                         seq_printf(s, "Intel and Nvidia");
293                         break;
294                 }
295                 seq_printf(s, "\n");
296         }
297         return 0;
298 }
299 
300 static int debugfs_cfg_open(struct inode *inode, struct file *file)
301 {
302         return single_open(file, debugfs_cfg_show, inode->i_private);
303 }
304 
305 static const struct file_operations debugfs_cfg_fops = {
306         .owner = THIS_MODULE,
307         .open = debugfs_cfg_open,
308         .read = seq_read,
309         .llseek = seq_lseek,
310         .release = single_release,
311 };
312 
313 static int ideapad_debugfs_init(struct ideapad_private *priv)
314 {
315         struct dentry *node;
316 
317         priv->debug = debugfs_create_dir("ideapad", NULL);
318         if (priv->debug == NULL) {
319                 pr_err("failed to create debugfs directory");
320                 goto errout;
321         }
322 
323         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
324                                    &debugfs_cfg_fops);
325         if (!node) {
326                 pr_err("failed to create cfg in debugfs");
327                 goto errout;
328         }
329 
330         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
331                                    &debugfs_status_fops);
332         if (!node) {
333                 pr_err("failed to create status in debugfs");
334                 goto errout;
335         }
336 
337         return 0;
338 
339 errout:
340         return -ENOMEM;
341 }
342 
343 static void ideapad_debugfs_exit(struct ideapad_private *priv)
344 {
345         debugfs_remove_recursive(priv->debug);
346         priv->debug = NULL;
347 }
348 
349 /*
350  * sysfs
351  */
352 static ssize_t show_ideapad_cam(struct device *dev,
353                                 struct device_attribute *attr,
354                                 char *buf)
355 {
356         unsigned long result;
357         struct ideapad_private *priv = dev_get_drvdata(dev);
358 
359         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
360                 return sprintf(buf, "-1\n");
361         return sprintf(buf, "%lu\n", result);
362 }
363 
364 static ssize_t store_ideapad_cam(struct device *dev,
365                                  struct device_attribute *attr,
366                                  const char *buf, size_t count)
367 {
368         int ret, state;
369         struct ideapad_private *priv = dev_get_drvdata(dev);
370 
371         if (!count)
372                 return 0;
373         if (sscanf(buf, "%i", &state) != 1)
374                 return -EINVAL;
375         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
376         if (ret < 0)
377                 return -EIO;
378         return count;
379 }
380 
381 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
382 
383 static ssize_t show_ideapad_fan(struct device *dev,
384                                 struct device_attribute *attr,
385                                 char *buf)
386 {
387         unsigned long result;
388         struct ideapad_private *priv = dev_get_drvdata(dev);
389 
390         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
391                 return sprintf(buf, "-1\n");
392         return sprintf(buf, "%lu\n", result);
393 }
394 
395 static ssize_t store_ideapad_fan(struct device *dev,
396                                  struct device_attribute *attr,
397                                  const char *buf, size_t count)
398 {
399         int ret, state;
400         struct ideapad_private *priv = dev_get_drvdata(dev);
401 
402         if (!count)
403                 return 0;
404         if (sscanf(buf, "%i", &state) != 1)
405                 return -EINVAL;
406         if (state < 0 || state > 4 || state == 3)
407                 return -EINVAL;
408         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
409         if (ret < 0)
410                 return -EIO;
411         return count;
412 }
413 
414 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
415 
416 static struct attribute *ideapad_attributes[] = {
417         &dev_attr_camera_power.attr,
418         &dev_attr_fan_mode.attr,
419         NULL
420 };
421 
422 static umode_t ideapad_is_visible(struct kobject *kobj,
423                                  struct attribute *attr,
424                                  int idx)
425 {
426         struct device *dev = container_of(kobj, struct device, kobj);
427         struct ideapad_private *priv = dev_get_drvdata(dev);
428         bool supported;
429 
430         if (attr == &dev_attr_camera_power.attr)
431                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
432         else if (attr == &dev_attr_fan_mode.attr) {
433                 unsigned long value;
434                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
435                                           &value);
436         } else
437                 supported = true;
438 
439         return supported ? attr->mode : 0;
440 }
441 
442 static struct attribute_group ideapad_attribute_group = {
443         .is_visible = ideapad_is_visible,
444         .attrs = ideapad_attributes
445 };
446 
447 /*
448  * Rfkill
449  */
450 struct ideapad_rfk_data {
451         char *name;
452         int cfgbit;
453         int opcode;
454         int type;
455 };
456 
457 const struct ideapad_rfk_data ideapad_rfk_data[] = {
458         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
459         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
460         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
461 };
462 
463 static int ideapad_rfk_set(void *data, bool blocked)
464 {
465         struct ideapad_rfk_priv *priv = data;
466 
467         return write_ec_cmd(priv->priv->adev->handle, priv->dev, !blocked);
468 }
469 
470 static struct rfkill_ops ideapad_rfk_ops = {
471         .set_block = ideapad_rfk_set,
472 };
473 
474 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
475 {
476         unsigned long hw_blocked;
477         int i;
478 
479         if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
480                 return;
481         hw_blocked = !hw_blocked;
482 
483         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
484                 if (priv->rfk[i])
485                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
486 }
487 
488 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
489 {
490         int ret;
491         unsigned long sw_blocked;
492 
493         if (no_bt_rfkill &&
494             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
495                 /* Force to enable bluetooth when no_bt_rfkill=1 */
496                 write_ec_cmd(priv->adev->handle,
497                              ideapad_rfk_data[dev].opcode, 1);
498                 return 0;
499         }
500         priv->rfk_priv[dev].dev = dev;
501         priv->rfk_priv[dev].priv = priv;
502 
503         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
504                                       &priv->platform_device->dev,
505                                       ideapad_rfk_data[dev].type,
506                                       &ideapad_rfk_ops,
507                                       &priv->rfk_priv[dev]);
508         if (!priv->rfk[dev])
509                 return -ENOMEM;
510 
511         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
512                          &sw_blocked)) {
513                 rfkill_init_sw_state(priv->rfk[dev], 0);
514         } else {
515                 sw_blocked = !sw_blocked;
516                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
517         }
518 
519         ret = rfkill_register(priv->rfk[dev]);
520         if (ret) {
521                 rfkill_destroy(priv->rfk[dev]);
522                 return ret;
523         }
524         return 0;
525 }
526 
527 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
528 {
529         if (!priv->rfk[dev])
530                 return;
531 
532         rfkill_unregister(priv->rfk[dev]);
533         rfkill_destroy(priv->rfk[dev]);
534 }
535 
536 /*
537  * Platform device
538  */
539 static int ideapad_sysfs_init(struct ideapad_private *priv)
540 {
541         return sysfs_create_group(&priv->platform_device->dev.kobj,
542                                     &ideapad_attribute_group);
543 }
544 
545 static void ideapad_sysfs_exit(struct ideapad_private *priv)
546 {
547         sysfs_remove_group(&priv->platform_device->dev.kobj,
548                            &ideapad_attribute_group);
549 }
550 
551 /*
552  * input device
553  */
554 static const struct key_entry ideapad_keymap[] = {
555         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
556         { KE_KEY, 7,  { KEY_CAMERA } },
557         { KE_KEY, 11, { KEY_F16 } },
558         { KE_KEY, 13, { KEY_WLAN } },
559         { KE_KEY, 16, { KEY_PROG1 } },
560         { KE_KEY, 17, { KEY_PROG2 } },
561         { KE_KEY, 64, { KEY_PROG3 } },
562         { KE_KEY, 65, { KEY_PROG4 } },
563         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
564         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
565         { KE_END, 0 },
566 };
567 
568 static int ideapad_input_init(struct ideapad_private *priv)
569 {
570         struct input_dev *inputdev;
571         int error;
572 
573         inputdev = input_allocate_device();
574         if (!inputdev)
575                 return -ENOMEM;
576 
577         inputdev->name = "Ideapad extra buttons";
578         inputdev->phys = "ideapad/input0";
579         inputdev->id.bustype = BUS_HOST;
580         inputdev->dev.parent = &priv->platform_device->dev;
581 
582         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
583         if (error) {
584                 pr_err("Unable to setup input device keymap\n");
585                 goto err_free_dev;
586         }
587 
588         error = input_register_device(inputdev);
589         if (error) {
590                 pr_err("Unable to register input device\n");
591                 goto err_free_keymap;
592         }
593 
594         priv->inputdev = inputdev;
595         return 0;
596 
597 err_free_keymap:
598         sparse_keymap_free(inputdev);
599 err_free_dev:
600         input_free_device(inputdev);
601         return error;
602 }
603 
604 static void ideapad_input_exit(struct ideapad_private *priv)
605 {
606         sparse_keymap_free(priv->inputdev);
607         input_unregister_device(priv->inputdev);
608         priv->inputdev = NULL;
609 }
610 
611 static void ideapad_input_report(struct ideapad_private *priv,
612                                  unsigned long scancode)
613 {
614         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
615 }
616 
617 static void ideapad_input_novokey(struct ideapad_private *priv)
618 {
619         unsigned long long_pressed;
620 
621         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
622                 return;
623         if (long_pressed)
624                 ideapad_input_report(priv, 17);
625         else
626                 ideapad_input_report(priv, 16);
627 }
628 
629 static void ideapad_check_special_buttons(struct ideapad_private *priv)
630 {
631         unsigned long bit, value;
632 
633         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
634 
635         for (bit = 0; bit < 16; bit++) {
636                 if (test_bit(bit, &value)) {
637                         switch (bit) {
638                         case 0: /* Z580 */
639                         case 6: /* Z570 */
640                                 /* Thermal Management button */
641                                 ideapad_input_report(priv, 65);
642                                 break;
643                         case 1:
644                                 /* OneKey Theater button */
645                                 ideapad_input_report(priv, 64);
646                                 break;
647                         default:
648                                 pr_info("Unknown special button: %lu\n", bit);
649                                 break;
650                         }
651                 }
652         }
653 }
654 
655 /*
656  * backlight
657  */
658 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
659 {
660         struct ideapad_private *priv = bl_get_data(blightdev);
661         unsigned long now;
662 
663         if (!priv)
664                 return -EINVAL;
665 
666         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
667                 return -EIO;
668         return now;
669 }
670 
671 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
672 {
673         struct ideapad_private *priv = bl_get_data(blightdev);
674 
675         if (!priv)
676                 return -EINVAL;
677 
678         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
679                          blightdev->props.brightness))
680                 return -EIO;
681         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
682                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
683                 return -EIO;
684 
685         return 0;
686 }
687 
688 static const struct backlight_ops ideapad_backlight_ops = {
689         .get_brightness = ideapad_backlight_get_brightness,
690         .update_status = ideapad_backlight_update_status,
691 };
692 
693 static int ideapad_backlight_init(struct ideapad_private *priv)
694 {
695         struct backlight_device *blightdev;
696         struct backlight_properties props;
697         unsigned long max, now, power;
698 
699         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
700                 return -EIO;
701         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
702                 return -EIO;
703         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
704                 return -EIO;
705 
706         memset(&props, 0, sizeof(struct backlight_properties));
707         props.max_brightness = max;
708         props.type = BACKLIGHT_PLATFORM;
709         blightdev = backlight_device_register("ideapad",
710                                               &priv->platform_device->dev,
711                                               priv,
712                                               &ideapad_backlight_ops,
713                                               &props);
714         if (IS_ERR(blightdev)) {
715                 pr_err("Could not register backlight device\n");
716                 return PTR_ERR(blightdev);
717         }
718 
719         priv->blightdev = blightdev;
720         blightdev->props.brightness = now;
721         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
722         backlight_update_status(blightdev);
723 
724         return 0;
725 }
726 
727 static void ideapad_backlight_exit(struct ideapad_private *priv)
728 {
729         if (priv->blightdev)
730                 backlight_device_unregister(priv->blightdev);
731         priv->blightdev = NULL;
732 }
733 
734 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
735 {
736         unsigned long power;
737         struct backlight_device *blightdev = priv->blightdev;
738 
739         if (!blightdev)
740                 return;
741         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
742                 return;
743         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
744 }
745 
746 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
747 {
748         unsigned long now;
749 
750         /* if we control brightness via acpi video driver */
751         if (priv->blightdev == NULL) {
752                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
753                 return;
754         }
755 
756         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
757 }
758 
759 /*
760  * module init/exit
761  */
762 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
763 {
764         unsigned long value;
765 
766         /* Without reading from EC touchpad LED doesn't switch state */
767         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
768                 /* Some IdeaPads don't really turn off touchpad - they only
769                  * switch the LED state. We (de)activate KBC AUX port to turn
770                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
771                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
772                 unsigned char param;
773                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
774                               I8042_CMD_AUX_DISABLE);
775                 ideapad_input_report(priv, value ? 67 : 66);
776         }
777 }
778 
779 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
780 {
781         struct ideapad_private *priv = data;
782         unsigned long vpc1, vpc2, vpc_bit;
783 
784         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
785                 return;
786         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
787                 return;
788 
789         vpc1 = (vpc2 << 8) | vpc1;
790         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
791                 if (test_bit(vpc_bit, &vpc1)) {
792                         switch (vpc_bit) {
793                         case 9:
794                                 ideapad_sync_rfk_state(priv);
795                                 break;
796                         case 13:
797                         case 11:
798                         case 7:
799                         case 6:
800                                 ideapad_input_report(priv, vpc_bit);
801                                 break;
802                         case 5:
803                                 ideapad_sync_touchpad_state(priv);
804                                 break;
805                         case 4:
806                                 ideapad_backlight_notify_brightness(priv);
807                                 break;
808                         case 3:
809                                 ideapad_input_novokey(priv);
810                                 break;
811                         case 2:
812                                 ideapad_backlight_notify_power(priv);
813                                 break;
814                         case 0:
815                                 ideapad_check_special_buttons(priv);
816                                 break;
817                         default:
818                                 pr_info("Unknown event: %lu\n", vpc_bit);
819                         }
820                 }
821         }
822 }
823 
824 /* Blacklist for devices where the ideapad rfkill interface does not work */
825 static struct dmi_system_id rfkill_blacklist[] = {
826         /* The Lenovo Yoga 2 11 always reports everything as blocked */
827         {
828                 .ident = "Lenovo Yoga 2 11",
829                 .matches = {
830                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
831                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2 11"),
832                 },
833         },
834         {}
835 };
836 
837 static int ideapad_acpi_add(struct platform_device *pdev)
838 {
839         int ret, i;
840         int cfg;
841         struct ideapad_private *priv;
842         struct acpi_device *adev;
843 
844         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
845         if (ret)
846                 return -ENODEV;
847 
848         if (read_method_int(adev->handle, "_CFG", &cfg))
849                 return -ENODEV;
850 
851         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
852         if (!priv)
853                 return -ENOMEM;
854 
855         dev_set_drvdata(&pdev->dev, priv);
856         priv->cfg = cfg;
857         priv->adev = adev;
858         priv->platform_device = pdev;
859 
860         ret = ideapad_sysfs_init(priv);
861         if (ret)
862                 return ret;
863 
864         ret = ideapad_debugfs_init(priv);
865         if (ret)
866                 goto debugfs_failed;
867 
868         ret = ideapad_input_init(priv);
869         if (ret)
870                 goto input_failed;
871 
872         if (!dmi_check_system(rfkill_blacklist)) {
873                 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
874                         if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
875                                 ideapad_register_rfkill(priv, i);
876         }
877         ideapad_sync_rfk_state(priv);
878         ideapad_sync_touchpad_state(priv);
879 
880         if (!acpi_video_backlight_support()) {
881                 ret = ideapad_backlight_init(priv);
882                 if (ret && ret != -ENODEV)
883                         goto backlight_failed;
884         }
885         ret = acpi_install_notify_handler(adev->handle,
886                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
887         if (ret)
888                 goto notification_failed;
889 
890         return 0;
891 notification_failed:
892         ideapad_backlight_exit(priv);
893 backlight_failed:
894         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
895                 ideapad_unregister_rfkill(priv, i);
896         ideapad_input_exit(priv);
897 input_failed:
898         ideapad_debugfs_exit(priv);
899 debugfs_failed:
900         ideapad_sysfs_exit(priv);
901         return ret;
902 }
903 
904 static int ideapad_acpi_remove(struct platform_device *pdev)
905 {
906         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
907         int i;
908 
909         acpi_remove_notify_handler(priv->adev->handle,
910                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
911         ideapad_backlight_exit(priv);
912         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
913                 ideapad_unregister_rfkill(priv, i);
914         ideapad_input_exit(priv);
915         ideapad_debugfs_exit(priv);
916         ideapad_sysfs_exit(priv);
917         dev_set_drvdata(&pdev->dev, NULL);
918 
919         return 0;
920 }
921 
922 #ifdef CONFIG_PM_SLEEP
923 static int ideapad_acpi_resume(struct device *device)
924 {
925         struct ideapad_private *priv;
926 
927         if (!device)
928                 return -EINVAL;
929         priv = dev_get_drvdata(device);
930 
931         ideapad_sync_rfk_state(priv);
932         ideapad_sync_touchpad_state(priv);
933         return 0;
934 }
935 #endif
936 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
937 
938 static const struct acpi_device_id ideapad_device_ids[] = {
939         { "VPC2004", 0},
940         { "", 0},
941 };
942 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
943 
944 static struct platform_driver ideapad_acpi_driver = {
945         .probe = ideapad_acpi_add,
946         .remove = ideapad_acpi_remove,
947         .driver = {
948                 .name   = "ideapad_acpi",
949                 .owner  = THIS_MODULE,
950                 .pm     = &ideapad_pm,
951                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
952         },
953 };
954 
955 module_platform_driver(ideapad_acpi_driver);
956 
957 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
958 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
959 MODULE_LICENSE("GPL");
960 

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