Version:  2.0.40 2.2.26 2.4.37 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 3.17

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

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