Version:  2.0.40 2.2.26 2.4.37 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2

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 #include <acpi/video.h>
 42 
 43 #define IDEAPAD_RFKILL_DEV_NUM  (3)
 44 
 45 #define CFG_BT_BIT      (16)
 46 #define CFG_3G_BIT      (17)
 47 #define CFG_WIFI_BIT    (18)
 48 #define CFG_CAMERA_BIT  (19)
 49 
 50 enum {
 51         VPCCMD_R_VPC1 = 0x10,
 52         VPCCMD_R_BL_MAX,
 53         VPCCMD_R_BL,
 54         VPCCMD_W_BL,
 55         VPCCMD_R_WIFI,
 56         VPCCMD_W_WIFI,
 57         VPCCMD_R_BT,
 58         VPCCMD_W_BT,
 59         VPCCMD_R_BL_POWER,
 60         VPCCMD_R_NOVO,
 61         VPCCMD_R_VPC2,
 62         VPCCMD_R_TOUCHPAD,
 63         VPCCMD_W_TOUCHPAD,
 64         VPCCMD_R_CAMERA,
 65         VPCCMD_W_CAMERA,
 66         VPCCMD_R_3G,
 67         VPCCMD_W_3G,
 68         VPCCMD_R_ODD, /* 0x21 */
 69         VPCCMD_W_FAN,
 70         VPCCMD_R_RF,
 71         VPCCMD_W_RF,
 72         VPCCMD_R_FAN = 0x2B,
 73         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
 74         VPCCMD_W_BL_POWER = 0x33,
 75 };
 76 
 77 struct ideapad_rfk_priv {
 78         int dev;
 79         struct ideapad_private *priv;
 80 };
 81 
 82 struct ideapad_private {
 83         struct acpi_device *adev;
 84         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
 85         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
 86         struct platform_device *platform_device;
 87         struct input_dev *inputdev;
 88         struct backlight_device *blightdev;
 89         struct dentry *debug;
 90         unsigned long cfg;
 91         bool has_hw_rfkill_switch;
 92 };
 93 
 94 static bool no_bt_rfkill;
 95 module_param(no_bt_rfkill, bool, 0444);
 96 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
 97 
 98 /*
 99  * ACPI Helpers
100  */
101 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
102 
103 static int read_method_int(acpi_handle handle, const char *method, int *val)
104 {
105         acpi_status status;
106         unsigned long long result;
107 
108         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
109         if (ACPI_FAILURE(status)) {
110                 *val = -1;
111                 return -1;
112         } else {
113                 *val = result;
114                 return 0;
115         }
116 }
117 
118 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
119 {
120         acpi_status status;
121         unsigned long long result;
122         struct acpi_object_list params;
123         union acpi_object in_obj;
124 
125         params.count = 1;
126         params.pointer = &in_obj;
127         in_obj.type = ACPI_TYPE_INTEGER;
128         in_obj.integer.value = cmd;
129 
130         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
131 
132         if (ACPI_FAILURE(status)) {
133                 *ret = -1;
134                 return -1;
135         } else {
136                 *ret = result;
137                 return 0;
138         }
139 }
140 
141 static int method_vpcw(acpi_handle handle, int cmd, int data)
142 {
143         struct acpi_object_list params;
144         union acpi_object in_obj[2];
145         acpi_status status;
146 
147         params.count = 2;
148         params.pointer = in_obj;
149         in_obj[0].type = ACPI_TYPE_INTEGER;
150         in_obj[0].integer.value = cmd;
151         in_obj[1].type = ACPI_TYPE_INTEGER;
152         in_obj[1].integer.value = data;
153 
154         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
155         if (status != AE_OK)
156                 return -1;
157         return 0;
158 }
159 
160 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
161 {
162         int val;
163         unsigned long int end_jiffies;
164 
165         if (method_vpcw(handle, 1, cmd))
166                 return -1;
167 
168         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
169              time_before(jiffies, end_jiffies);) {
170                 schedule();
171                 if (method_vpcr(handle, 1, &val))
172                         return -1;
173                 if (val == 0) {
174                         if (method_vpcr(handle, 0, &val))
175                                 return -1;
176                         *data = val;
177                         return 0;
178                 }
179         }
180         pr_err("timeout in read_ec_cmd\n");
181         return -1;
182 }
183 
184 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
185 {
186         int val;
187         unsigned long int end_jiffies;
188 
189         if (method_vpcw(handle, 0, data))
190                 return -1;
191         if (method_vpcw(handle, 1, cmd))
192                 return -1;
193 
194         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
195              time_before(jiffies, end_jiffies);) {
196                 schedule();
197                 if (method_vpcr(handle, 1, &val))
198                         return -1;
199                 if (val == 0)
200                         return 0;
201         }
202         pr_err("timeout in write_ec_cmd\n");
203         return -1;
204 }
205 
206 /*
207  * debugfs
208  */
209 static int debugfs_status_show(struct seq_file *s, void *data)
210 {
211         struct ideapad_private *priv = s->private;
212         unsigned long value;
213 
214         if (!priv)
215                 return -EINVAL;
216 
217         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
218                 seq_printf(s, "Backlight max:\t%lu\n", value);
219         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
220                 seq_printf(s, "Backlight now:\t%lu\n", value);
221         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
222                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
223         seq_printf(s, "=====================\n");
224 
225         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
226                 seq_printf(s, "Radio status:\t%s(%lu)\n",
227                            value ? "On" : "Off", value);
228         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
229                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
230                            value ? "On" : "Off", value);
231         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
232                 seq_printf(s, "BT status:\t%s(%lu)\n",
233                            value ? "On" : "Off", value);
234         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
235                 seq_printf(s, "3G status:\t%s(%lu)\n",
236                            value ? "On" : "Off", value);
237         seq_printf(s, "=====================\n");
238 
239         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
240                 seq_printf(s, "Touchpad status:%s(%lu)\n",
241                            value ? "On" : "Off", value);
242         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
243                 seq_printf(s, "Camera status:\t%s(%lu)\n",
244                            value ? "On" : "Off", value);
245 
246         return 0;
247 }
248 
249 static int debugfs_status_open(struct inode *inode, struct file *file)
250 {
251         return single_open(file, debugfs_status_show, inode->i_private);
252 }
253 
254 static const struct file_operations debugfs_status_fops = {
255         .owner = THIS_MODULE,
256         .open = debugfs_status_open,
257         .read = seq_read,
258         .llseek = seq_lseek,
259         .release = single_release,
260 };
261 
262 static int debugfs_cfg_show(struct seq_file *s, void *data)
263 {
264         struct ideapad_private *priv = s->private;
265 
266         if (!priv) {
267                 seq_printf(s, "cfg: N/A\n");
268         } else {
269                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
270                            priv->cfg);
271                 if (test_bit(CFG_BT_BIT, &priv->cfg))
272                         seq_printf(s, "Bluetooth ");
273                 if (test_bit(CFG_3G_BIT, &priv->cfg))
274                         seq_printf(s, "3G ");
275                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
276                         seq_printf(s, "Wireless ");
277                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
278                         seq_printf(s, "Camera ");
279                 seq_printf(s, "\nGraphic: ");
280                 switch ((priv->cfg)&0x700) {
281                 case 0x100:
282                         seq_printf(s, "Intel");
283                         break;
284                 case 0x200:
285                         seq_printf(s, "ATI");
286                         break;
287                 case 0x300:
288                         seq_printf(s, "Nvidia");
289                         break;
290                 case 0x400:
291                         seq_printf(s, "Intel and ATI");
292                         break;
293                 case 0x500:
294                         seq_printf(s, "Intel and Nvidia");
295                         break;
296                 }
297                 seq_printf(s, "\n");
298         }
299         return 0;
300 }
301 
302 static int debugfs_cfg_open(struct inode *inode, struct file *file)
303 {
304         return single_open(file, debugfs_cfg_show, inode->i_private);
305 }
306 
307 static const struct file_operations debugfs_cfg_fops = {
308         .owner = THIS_MODULE,
309         .open = debugfs_cfg_open,
310         .read = seq_read,
311         .llseek = seq_lseek,
312         .release = single_release,
313 };
314 
315 static int ideapad_debugfs_init(struct ideapad_private *priv)
316 {
317         struct dentry *node;
318 
319         priv->debug = debugfs_create_dir("ideapad", NULL);
320         if (priv->debug == NULL) {
321                 pr_err("failed to create debugfs directory");
322                 goto errout;
323         }
324 
325         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
326                                    &debugfs_cfg_fops);
327         if (!node) {
328                 pr_err("failed to create cfg in debugfs");
329                 goto errout;
330         }
331 
332         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
333                                    &debugfs_status_fops);
334         if (!node) {
335                 pr_err("failed to create status in debugfs");
336                 goto errout;
337         }
338 
339         return 0;
340 
341 errout:
342         return -ENOMEM;
343 }
344 
345 static void ideapad_debugfs_exit(struct ideapad_private *priv)
346 {
347         debugfs_remove_recursive(priv->debug);
348         priv->debug = NULL;
349 }
350 
351 /*
352  * sysfs
353  */
354 static ssize_t show_ideapad_cam(struct device *dev,
355                                 struct device_attribute *attr,
356                                 char *buf)
357 {
358         unsigned long result;
359         struct ideapad_private *priv = dev_get_drvdata(dev);
360 
361         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
362                 return sprintf(buf, "-1\n");
363         return sprintf(buf, "%lu\n", result);
364 }
365 
366 static ssize_t store_ideapad_cam(struct device *dev,
367                                  struct device_attribute *attr,
368                                  const char *buf, size_t count)
369 {
370         int ret, state;
371         struct ideapad_private *priv = dev_get_drvdata(dev);
372 
373         if (!count)
374                 return 0;
375         if (sscanf(buf, "%i", &state) != 1)
376                 return -EINVAL;
377         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
378         if (ret < 0)
379                 return -EIO;
380         return count;
381 }
382 
383 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
384 
385 static ssize_t show_ideapad_fan(struct device *dev,
386                                 struct device_attribute *attr,
387                                 char *buf)
388 {
389         unsigned long result;
390         struct ideapad_private *priv = dev_get_drvdata(dev);
391 
392         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
393                 return sprintf(buf, "-1\n");
394         return sprintf(buf, "%lu\n", result);
395 }
396 
397 static ssize_t store_ideapad_fan(struct device *dev,
398                                  struct device_attribute *attr,
399                                  const char *buf, size_t count)
400 {
401         int ret, state;
402         struct ideapad_private *priv = dev_get_drvdata(dev);
403 
404         if (!count)
405                 return 0;
406         if (sscanf(buf, "%i", &state) != 1)
407                 return -EINVAL;
408         if (state < 0 || state > 4 || state == 3)
409                 return -EINVAL;
410         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
411         if (ret < 0)
412                 return -EIO;
413         return count;
414 }
415 
416 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
417 
418 static struct attribute *ideapad_attributes[] = {
419         &dev_attr_camera_power.attr,
420         &dev_attr_fan_mode.attr,
421         NULL
422 };
423 
424 static umode_t ideapad_is_visible(struct kobject *kobj,
425                                  struct attribute *attr,
426                                  int idx)
427 {
428         struct device *dev = container_of(kobj, struct device, kobj);
429         struct ideapad_private *priv = dev_get_drvdata(dev);
430         bool supported;
431 
432         if (attr == &dev_attr_camera_power.attr)
433                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
434         else if (attr == &dev_attr_fan_mode.attr) {
435                 unsigned long value;
436                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
437                                           &value);
438         } else
439                 supported = true;
440 
441         return supported ? attr->mode : 0;
442 }
443 
444 static const struct attribute_group ideapad_attribute_group = {
445         .is_visible = ideapad_is_visible,
446         .attrs = ideapad_attributes
447 };
448 
449 /*
450  * Rfkill
451  */
452 struct ideapad_rfk_data {
453         char *name;
454         int cfgbit;
455         int opcode;
456         int type;
457 };
458 
459 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
460         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
461         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
462         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
463 };
464 
465 static int ideapad_rfk_set(void *data, bool blocked)
466 {
467         struct ideapad_rfk_priv *priv = data;
468         int opcode = ideapad_rfk_data[priv->dev].opcode;
469 
470         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
471 }
472 
473 static struct rfkill_ops ideapad_rfk_ops = {
474         .set_block = ideapad_rfk_set,
475 };
476 
477 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
478 {
479         unsigned long hw_blocked = 0;
480         int i;
481 
482         if (priv->has_hw_rfkill_switch) {
483                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
484                         return;
485                 hw_blocked = !hw_blocked;
486         }
487 
488         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
489                 if (priv->rfk[i])
490                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
491 }
492 
493 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
494 {
495         int ret;
496         unsigned long sw_blocked;
497 
498         if (no_bt_rfkill &&
499             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
500                 /* Force to enable bluetooth when no_bt_rfkill=1 */
501                 write_ec_cmd(priv->adev->handle,
502                              ideapad_rfk_data[dev].opcode, 1);
503                 return 0;
504         }
505         priv->rfk_priv[dev].dev = dev;
506         priv->rfk_priv[dev].priv = priv;
507 
508         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
509                                       &priv->platform_device->dev,
510                                       ideapad_rfk_data[dev].type,
511                                       &ideapad_rfk_ops,
512                                       &priv->rfk_priv[dev]);
513         if (!priv->rfk[dev])
514                 return -ENOMEM;
515 
516         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
517                          &sw_blocked)) {
518                 rfkill_init_sw_state(priv->rfk[dev], 0);
519         } else {
520                 sw_blocked = !sw_blocked;
521                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
522         }
523 
524         ret = rfkill_register(priv->rfk[dev]);
525         if (ret) {
526                 rfkill_destroy(priv->rfk[dev]);
527                 return ret;
528         }
529         return 0;
530 }
531 
532 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
533 {
534         if (!priv->rfk[dev])
535                 return;
536 
537         rfkill_unregister(priv->rfk[dev]);
538         rfkill_destroy(priv->rfk[dev]);
539 }
540 
541 /*
542  * Platform device
543  */
544 static int ideapad_sysfs_init(struct ideapad_private *priv)
545 {
546         return sysfs_create_group(&priv->platform_device->dev.kobj,
547                                     &ideapad_attribute_group);
548 }
549 
550 static void ideapad_sysfs_exit(struct ideapad_private *priv)
551 {
552         sysfs_remove_group(&priv->platform_device->dev.kobj,
553                            &ideapad_attribute_group);
554 }
555 
556 /*
557  * input device
558  */
559 static const struct key_entry ideapad_keymap[] = {
560         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
561         { KE_KEY, 7,  { KEY_CAMERA } },
562         { KE_KEY, 11, { KEY_F16 } },
563         { KE_KEY, 13, { KEY_WLAN } },
564         { KE_KEY, 16, { KEY_PROG1 } },
565         { KE_KEY, 17, { KEY_PROG2 } },
566         { KE_KEY, 64, { KEY_PROG3 } },
567         { KE_KEY, 65, { KEY_PROG4 } },
568         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
569         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
570         { KE_END, 0 },
571 };
572 
573 static int ideapad_input_init(struct ideapad_private *priv)
574 {
575         struct input_dev *inputdev;
576         int error;
577 
578         inputdev = input_allocate_device();
579         if (!inputdev)
580                 return -ENOMEM;
581 
582         inputdev->name = "Ideapad extra buttons";
583         inputdev->phys = "ideapad/input0";
584         inputdev->id.bustype = BUS_HOST;
585         inputdev->dev.parent = &priv->platform_device->dev;
586 
587         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
588         if (error) {
589                 pr_err("Unable to setup input device keymap\n");
590                 goto err_free_dev;
591         }
592 
593         error = input_register_device(inputdev);
594         if (error) {
595                 pr_err("Unable to register input device\n");
596                 goto err_free_keymap;
597         }
598 
599         priv->inputdev = inputdev;
600         return 0;
601 
602 err_free_keymap:
603         sparse_keymap_free(inputdev);
604 err_free_dev:
605         input_free_device(inputdev);
606         return error;
607 }
608 
609 static void ideapad_input_exit(struct ideapad_private *priv)
610 {
611         sparse_keymap_free(priv->inputdev);
612         input_unregister_device(priv->inputdev);
613         priv->inputdev = NULL;
614 }
615 
616 static void ideapad_input_report(struct ideapad_private *priv,
617                                  unsigned long scancode)
618 {
619         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
620 }
621 
622 static void ideapad_input_novokey(struct ideapad_private *priv)
623 {
624         unsigned long long_pressed;
625 
626         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
627                 return;
628         if (long_pressed)
629                 ideapad_input_report(priv, 17);
630         else
631                 ideapad_input_report(priv, 16);
632 }
633 
634 static void ideapad_check_special_buttons(struct ideapad_private *priv)
635 {
636         unsigned long bit, value;
637 
638         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
639 
640         for (bit = 0; bit < 16; bit++) {
641                 if (test_bit(bit, &value)) {
642                         switch (bit) {
643                         case 0: /* Z580 */
644                         case 6: /* Z570 */
645                                 /* Thermal Management button */
646                                 ideapad_input_report(priv, 65);
647                                 break;
648                         case 1:
649                                 /* OneKey Theater button */
650                                 ideapad_input_report(priv, 64);
651                                 break;
652                         default:
653                                 pr_info("Unknown special button: %lu\n", bit);
654                                 break;
655                         }
656                 }
657         }
658 }
659 
660 /*
661  * backlight
662  */
663 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
664 {
665         struct ideapad_private *priv = bl_get_data(blightdev);
666         unsigned long now;
667 
668         if (!priv)
669                 return -EINVAL;
670 
671         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
672                 return -EIO;
673         return now;
674 }
675 
676 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
677 {
678         struct ideapad_private *priv = bl_get_data(blightdev);
679 
680         if (!priv)
681                 return -EINVAL;
682 
683         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
684                          blightdev->props.brightness))
685                 return -EIO;
686         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
687                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
688                 return -EIO;
689 
690         return 0;
691 }
692 
693 static const struct backlight_ops ideapad_backlight_ops = {
694         .get_brightness = ideapad_backlight_get_brightness,
695         .update_status = ideapad_backlight_update_status,
696 };
697 
698 static int ideapad_backlight_init(struct ideapad_private *priv)
699 {
700         struct backlight_device *blightdev;
701         struct backlight_properties props;
702         unsigned long max, now, power;
703 
704         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
705                 return -EIO;
706         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
707                 return -EIO;
708         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
709                 return -EIO;
710 
711         memset(&props, 0, sizeof(struct backlight_properties));
712         props.max_brightness = max;
713         props.type = BACKLIGHT_PLATFORM;
714         blightdev = backlight_device_register("ideapad",
715                                               &priv->platform_device->dev,
716                                               priv,
717                                               &ideapad_backlight_ops,
718                                               &props);
719         if (IS_ERR(blightdev)) {
720                 pr_err("Could not register backlight device\n");
721                 return PTR_ERR(blightdev);
722         }
723 
724         priv->blightdev = blightdev;
725         blightdev->props.brightness = now;
726         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
727         backlight_update_status(blightdev);
728 
729         return 0;
730 }
731 
732 static void ideapad_backlight_exit(struct ideapad_private *priv)
733 {
734         backlight_device_unregister(priv->blightdev);
735         priv->blightdev = NULL;
736 }
737 
738 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
739 {
740         unsigned long power;
741         struct backlight_device *blightdev = priv->blightdev;
742 
743         if (!blightdev)
744                 return;
745         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
746                 return;
747         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
748 }
749 
750 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
751 {
752         unsigned long now;
753 
754         /* if we control brightness via acpi video driver */
755         if (priv->blightdev == NULL) {
756                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
757                 return;
758         }
759 
760         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
761 }
762 
763 /*
764  * module init/exit
765  */
766 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
767 {
768         unsigned long value;
769 
770         /* Without reading from EC touchpad LED doesn't switch state */
771         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
772                 /* Some IdeaPads don't really turn off touchpad - they only
773                  * switch the LED state. We (de)activate KBC AUX port to turn
774                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
775                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
776                 unsigned char param;
777                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
778                               I8042_CMD_AUX_DISABLE);
779                 ideapad_input_report(priv, value ? 67 : 66);
780         }
781 }
782 
783 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
784 {
785         struct ideapad_private *priv = data;
786         unsigned long vpc1, vpc2, vpc_bit;
787 
788         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
789                 return;
790         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
791                 return;
792 
793         vpc1 = (vpc2 << 8) | vpc1;
794         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
795                 if (test_bit(vpc_bit, &vpc1)) {
796                         switch (vpc_bit) {
797                         case 9:
798                                 ideapad_sync_rfk_state(priv);
799                                 break;
800                         case 13:
801                         case 11:
802                         case 7:
803                         case 6:
804                                 ideapad_input_report(priv, vpc_bit);
805                                 break;
806                         case 5:
807                                 ideapad_sync_touchpad_state(priv);
808                                 break;
809                         case 4:
810                                 ideapad_backlight_notify_brightness(priv);
811                                 break;
812                         case 3:
813                                 ideapad_input_novokey(priv);
814                                 break;
815                         case 2:
816                                 ideapad_backlight_notify_power(priv);
817                                 break;
818                         case 0:
819                                 ideapad_check_special_buttons(priv);
820                                 break;
821                         default:
822                                 pr_info("Unknown event: %lu\n", vpc_bit);
823                         }
824                 }
825         }
826 }
827 
828 /*
829  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
830  * always results in 0 on these models, causing ideapad_laptop to wrongly
831  * report all radios as hardware-blocked.
832  */
833 static const struct dmi_system_id no_hw_rfkill_list[] = {
834         {
835                 .ident = "Lenovo G40-30",
836                 .matches = {
837                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
838                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
839                 },
840         },
841         {
842                 .ident = "Lenovo G50-30",
843                 .matches = {
844                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
845                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
846                 },
847         },
848         {
849                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
850                 .matches = {
851                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
852                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
853                 },
854         },
855         {
856                 .ident = "Lenovo Yoga 3 Pro 1370",
857                 .matches = {
858                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
859                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3 Pro-1370"),
860                 },
861         },
862         {}
863 };
864 
865 static int ideapad_acpi_add(struct platform_device *pdev)
866 {
867         int ret, i;
868         int cfg;
869         struct ideapad_private *priv;
870         struct acpi_device *adev;
871 
872         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
873         if (ret)
874                 return -ENODEV;
875 
876         if (read_method_int(adev->handle, "_CFG", &cfg))
877                 return -ENODEV;
878 
879         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
880         if (!priv)
881                 return -ENOMEM;
882 
883         dev_set_drvdata(&pdev->dev, priv);
884         priv->cfg = cfg;
885         priv->adev = adev;
886         priv->platform_device = pdev;
887         priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
888 
889         ret = ideapad_sysfs_init(priv);
890         if (ret)
891                 return ret;
892 
893         ret = ideapad_debugfs_init(priv);
894         if (ret)
895                 goto debugfs_failed;
896 
897         ret = ideapad_input_init(priv);
898         if (ret)
899                 goto input_failed;
900 
901         /*
902          * On some models without a hw-switch (the yoga 2 13 at least)
903          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
904          */
905         if (!priv->has_hw_rfkill_switch)
906                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
907 
908         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
909                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
910                         ideapad_register_rfkill(priv, i);
911 
912         ideapad_sync_rfk_state(priv);
913         ideapad_sync_touchpad_state(priv);
914 
915         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
916                 ret = ideapad_backlight_init(priv);
917                 if (ret && ret != -ENODEV)
918                         goto backlight_failed;
919         }
920         ret = acpi_install_notify_handler(adev->handle,
921                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
922         if (ret)
923                 goto notification_failed;
924 
925         return 0;
926 notification_failed:
927         ideapad_backlight_exit(priv);
928 backlight_failed:
929         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
930                 ideapad_unregister_rfkill(priv, i);
931         ideapad_input_exit(priv);
932 input_failed:
933         ideapad_debugfs_exit(priv);
934 debugfs_failed:
935         ideapad_sysfs_exit(priv);
936         return ret;
937 }
938 
939 static int ideapad_acpi_remove(struct platform_device *pdev)
940 {
941         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
942         int i;
943 
944         acpi_remove_notify_handler(priv->adev->handle,
945                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
946         ideapad_backlight_exit(priv);
947         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
948                 ideapad_unregister_rfkill(priv, i);
949         ideapad_input_exit(priv);
950         ideapad_debugfs_exit(priv);
951         ideapad_sysfs_exit(priv);
952         dev_set_drvdata(&pdev->dev, NULL);
953 
954         return 0;
955 }
956 
957 #ifdef CONFIG_PM_SLEEP
958 static int ideapad_acpi_resume(struct device *device)
959 {
960         struct ideapad_private *priv;
961 
962         if (!device)
963                 return -EINVAL;
964         priv = dev_get_drvdata(device);
965 
966         ideapad_sync_rfk_state(priv);
967         ideapad_sync_touchpad_state(priv);
968         return 0;
969 }
970 #endif
971 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
972 
973 static const struct acpi_device_id ideapad_device_ids[] = {
974         { "VPC2004", 0},
975         { "", 0},
976 };
977 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
978 
979 static struct platform_driver ideapad_acpi_driver = {
980         .probe = ideapad_acpi_add,
981         .remove = ideapad_acpi_remove,
982         .driver = {
983                 .name   = "ideapad_acpi",
984                 .pm     = &ideapad_pm,
985                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
986         },
987 };
988 
989 module_platform_driver(ideapad_acpi_driver);
990 
991 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
992 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
993 MODULE_LICENSE("GPL");
994 

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