Version:  2.0.40 2.2.26 2.4.37 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 4.3 4.4 4.5 4.6 4.7

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 #if IS_ENABLED(CONFIG_ACPI_WMI)
 51 static const char *const ideapad_wmi_fnesc_events[] = {
 52         "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
 53         "56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
 54 };
 55 #endif
 56 
 57 enum {
 58         VPCCMD_R_VPC1 = 0x10,
 59         VPCCMD_R_BL_MAX,
 60         VPCCMD_R_BL,
 61         VPCCMD_W_BL,
 62         VPCCMD_R_WIFI,
 63         VPCCMD_W_WIFI,
 64         VPCCMD_R_BT,
 65         VPCCMD_W_BT,
 66         VPCCMD_R_BL_POWER,
 67         VPCCMD_R_NOVO,
 68         VPCCMD_R_VPC2,
 69         VPCCMD_R_TOUCHPAD,
 70         VPCCMD_W_TOUCHPAD,
 71         VPCCMD_R_CAMERA,
 72         VPCCMD_W_CAMERA,
 73         VPCCMD_R_3G,
 74         VPCCMD_W_3G,
 75         VPCCMD_R_ODD, /* 0x21 */
 76         VPCCMD_W_FAN,
 77         VPCCMD_R_RF,
 78         VPCCMD_W_RF,
 79         VPCCMD_R_FAN = 0x2B,
 80         VPCCMD_R_SPECIAL_BUTTONS = 0x31,
 81         VPCCMD_W_BL_POWER = 0x33,
 82 };
 83 
 84 struct ideapad_rfk_priv {
 85         int dev;
 86         struct ideapad_private *priv;
 87 };
 88 
 89 struct ideapad_private {
 90         struct acpi_device *adev;
 91         struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
 92         struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
 93         struct platform_device *platform_device;
 94         struct input_dev *inputdev;
 95         struct backlight_device *blightdev;
 96         struct dentry *debug;
 97         unsigned long cfg;
 98         bool has_hw_rfkill_switch;
 99         const char *fnesc_guid;
100 };
101 
102 static bool no_bt_rfkill;
103 module_param(no_bt_rfkill, bool, 0444);
104 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
105 
106 /*
107  * ACPI Helpers
108  */
109 #define IDEAPAD_EC_TIMEOUT (100) /* in ms */
110 
111 static int read_method_int(acpi_handle handle, const char *method, int *val)
112 {
113         acpi_status status;
114         unsigned long long result;
115 
116         status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
117         if (ACPI_FAILURE(status)) {
118                 *val = -1;
119                 return -1;
120         } else {
121                 *val = result;
122                 return 0;
123         }
124 }
125 
126 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
127 {
128         acpi_status status;
129         unsigned long long result;
130         struct acpi_object_list params;
131         union acpi_object in_obj;
132 
133         params.count = 1;
134         params.pointer = &in_obj;
135         in_obj.type = ACPI_TYPE_INTEGER;
136         in_obj.integer.value = cmd;
137 
138         status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
139 
140         if (ACPI_FAILURE(status)) {
141                 *ret = -1;
142                 return -1;
143         } else {
144                 *ret = result;
145                 return 0;
146         }
147 }
148 
149 static int method_vpcw(acpi_handle handle, int cmd, int data)
150 {
151         struct acpi_object_list params;
152         union acpi_object in_obj[2];
153         acpi_status status;
154 
155         params.count = 2;
156         params.pointer = in_obj;
157         in_obj[0].type = ACPI_TYPE_INTEGER;
158         in_obj[0].integer.value = cmd;
159         in_obj[1].type = ACPI_TYPE_INTEGER;
160         in_obj[1].integer.value = data;
161 
162         status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
163         if (status != AE_OK)
164                 return -1;
165         return 0;
166 }
167 
168 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
169 {
170         int val;
171         unsigned long int end_jiffies;
172 
173         if (method_vpcw(handle, 1, cmd))
174                 return -1;
175 
176         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
177              time_before(jiffies, end_jiffies);) {
178                 schedule();
179                 if (method_vpcr(handle, 1, &val))
180                         return -1;
181                 if (val == 0) {
182                         if (method_vpcr(handle, 0, &val))
183                                 return -1;
184                         *data = val;
185                         return 0;
186                 }
187         }
188         pr_err("timeout in read_ec_cmd\n");
189         return -1;
190 }
191 
192 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
193 {
194         int val;
195         unsigned long int end_jiffies;
196 
197         if (method_vpcw(handle, 0, data))
198                 return -1;
199         if (method_vpcw(handle, 1, cmd))
200                 return -1;
201 
202         for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
203              time_before(jiffies, end_jiffies);) {
204                 schedule();
205                 if (method_vpcr(handle, 1, &val))
206                         return -1;
207                 if (val == 0)
208                         return 0;
209         }
210         pr_err("timeout in write_ec_cmd\n");
211         return -1;
212 }
213 
214 /*
215  * debugfs
216  */
217 static int debugfs_status_show(struct seq_file *s, void *data)
218 {
219         struct ideapad_private *priv = s->private;
220         unsigned long value;
221 
222         if (!priv)
223                 return -EINVAL;
224 
225         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
226                 seq_printf(s, "Backlight max:\t%lu\n", value);
227         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
228                 seq_printf(s, "Backlight now:\t%lu\n", value);
229         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
230                 seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
231         seq_printf(s, "=====================\n");
232 
233         if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
234                 seq_printf(s, "Radio status:\t%s(%lu)\n",
235                            value ? "On" : "Off", value);
236         if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
237                 seq_printf(s, "Wifi status:\t%s(%lu)\n",
238                            value ? "On" : "Off", value);
239         if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
240                 seq_printf(s, "BT status:\t%s(%lu)\n",
241                            value ? "On" : "Off", value);
242         if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
243                 seq_printf(s, "3G status:\t%s(%lu)\n",
244                            value ? "On" : "Off", value);
245         seq_printf(s, "=====================\n");
246 
247         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
248                 seq_printf(s, "Touchpad status:%s(%lu)\n",
249                            value ? "On" : "Off", value);
250         if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
251                 seq_printf(s, "Camera status:\t%s(%lu)\n",
252                            value ? "On" : "Off", value);
253 
254         return 0;
255 }
256 
257 static int debugfs_status_open(struct inode *inode, struct file *file)
258 {
259         return single_open(file, debugfs_status_show, inode->i_private);
260 }
261 
262 static const struct file_operations debugfs_status_fops = {
263         .owner = THIS_MODULE,
264         .open = debugfs_status_open,
265         .read = seq_read,
266         .llseek = seq_lseek,
267         .release = single_release,
268 };
269 
270 static int debugfs_cfg_show(struct seq_file *s, void *data)
271 {
272         struct ideapad_private *priv = s->private;
273 
274         if (!priv) {
275                 seq_printf(s, "cfg: N/A\n");
276         } else {
277                 seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
278                            priv->cfg);
279                 if (test_bit(CFG_BT_BIT, &priv->cfg))
280                         seq_printf(s, "Bluetooth ");
281                 if (test_bit(CFG_3G_BIT, &priv->cfg))
282                         seq_printf(s, "3G ");
283                 if (test_bit(CFG_WIFI_BIT, &priv->cfg))
284                         seq_printf(s, "Wireless ");
285                 if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
286                         seq_printf(s, "Camera ");
287                 seq_printf(s, "\nGraphic: ");
288                 switch ((priv->cfg)&0x700) {
289                 case 0x100:
290                         seq_printf(s, "Intel");
291                         break;
292                 case 0x200:
293                         seq_printf(s, "ATI");
294                         break;
295                 case 0x300:
296                         seq_printf(s, "Nvidia");
297                         break;
298                 case 0x400:
299                         seq_printf(s, "Intel and ATI");
300                         break;
301                 case 0x500:
302                         seq_printf(s, "Intel and Nvidia");
303                         break;
304                 }
305                 seq_printf(s, "\n");
306         }
307         return 0;
308 }
309 
310 static int debugfs_cfg_open(struct inode *inode, struct file *file)
311 {
312         return single_open(file, debugfs_cfg_show, inode->i_private);
313 }
314 
315 static const struct file_operations debugfs_cfg_fops = {
316         .owner = THIS_MODULE,
317         .open = debugfs_cfg_open,
318         .read = seq_read,
319         .llseek = seq_lseek,
320         .release = single_release,
321 };
322 
323 static int ideapad_debugfs_init(struct ideapad_private *priv)
324 {
325         struct dentry *node;
326 
327         priv->debug = debugfs_create_dir("ideapad", NULL);
328         if (priv->debug == NULL) {
329                 pr_err("failed to create debugfs directory");
330                 goto errout;
331         }
332 
333         node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
334                                    &debugfs_cfg_fops);
335         if (!node) {
336                 pr_err("failed to create cfg in debugfs");
337                 goto errout;
338         }
339 
340         node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
341                                    &debugfs_status_fops);
342         if (!node) {
343                 pr_err("failed to create status in debugfs");
344                 goto errout;
345         }
346 
347         return 0;
348 
349 errout:
350         return -ENOMEM;
351 }
352 
353 static void ideapad_debugfs_exit(struct ideapad_private *priv)
354 {
355         debugfs_remove_recursive(priv->debug);
356         priv->debug = NULL;
357 }
358 
359 /*
360  * sysfs
361  */
362 static ssize_t show_ideapad_cam(struct device *dev,
363                                 struct device_attribute *attr,
364                                 char *buf)
365 {
366         unsigned long result;
367         struct ideapad_private *priv = dev_get_drvdata(dev);
368 
369         if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
370                 return sprintf(buf, "-1\n");
371         return sprintf(buf, "%lu\n", result);
372 }
373 
374 static ssize_t store_ideapad_cam(struct device *dev,
375                                  struct device_attribute *attr,
376                                  const char *buf, size_t count)
377 {
378         int ret, state;
379         struct ideapad_private *priv = dev_get_drvdata(dev);
380 
381         if (!count)
382                 return 0;
383         if (sscanf(buf, "%i", &state) != 1)
384                 return -EINVAL;
385         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
386         if (ret < 0)
387                 return -EIO;
388         return count;
389 }
390 
391 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
392 
393 static ssize_t show_ideapad_fan(struct device *dev,
394                                 struct device_attribute *attr,
395                                 char *buf)
396 {
397         unsigned long result;
398         struct ideapad_private *priv = dev_get_drvdata(dev);
399 
400         if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
401                 return sprintf(buf, "-1\n");
402         return sprintf(buf, "%lu\n", result);
403 }
404 
405 static ssize_t store_ideapad_fan(struct device *dev,
406                                  struct device_attribute *attr,
407                                  const char *buf, size_t count)
408 {
409         int ret, state;
410         struct ideapad_private *priv = dev_get_drvdata(dev);
411 
412         if (!count)
413                 return 0;
414         if (sscanf(buf, "%i", &state) != 1)
415                 return -EINVAL;
416         if (state < 0 || state > 4 || state == 3)
417                 return -EINVAL;
418         ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
419         if (ret < 0)
420                 return -EIO;
421         return count;
422 }
423 
424 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
425 
426 static struct attribute *ideapad_attributes[] = {
427         &dev_attr_camera_power.attr,
428         &dev_attr_fan_mode.attr,
429         NULL
430 };
431 
432 static umode_t ideapad_is_visible(struct kobject *kobj,
433                                  struct attribute *attr,
434                                  int idx)
435 {
436         struct device *dev = container_of(kobj, struct device, kobj);
437         struct ideapad_private *priv = dev_get_drvdata(dev);
438         bool supported;
439 
440         if (attr == &dev_attr_camera_power.attr)
441                 supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
442         else if (attr == &dev_attr_fan_mode.attr) {
443                 unsigned long value;
444                 supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
445                                           &value);
446         } else
447                 supported = true;
448 
449         return supported ? attr->mode : 0;
450 }
451 
452 static const struct attribute_group ideapad_attribute_group = {
453         .is_visible = ideapad_is_visible,
454         .attrs = ideapad_attributes
455 };
456 
457 /*
458  * Rfkill
459  */
460 struct ideapad_rfk_data {
461         char *name;
462         int cfgbit;
463         int opcode;
464         int type;
465 };
466 
467 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
468         { "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
469         { "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
470         { "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
471 };
472 
473 static int ideapad_rfk_set(void *data, bool blocked)
474 {
475         struct ideapad_rfk_priv *priv = data;
476         int opcode = ideapad_rfk_data[priv->dev].opcode;
477 
478         return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
479 }
480 
481 static struct rfkill_ops ideapad_rfk_ops = {
482         .set_block = ideapad_rfk_set,
483 };
484 
485 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
486 {
487         unsigned long hw_blocked = 0;
488         int i;
489 
490         if (priv->has_hw_rfkill_switch) {
491                 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
492                         return;
493                 hw_blocked = !hw_blocked;
494         }
495 
496         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
497                 if (priv->rfk[i])
498                         rfkill_set_hw_state(priv->rfk[i], hw_blocked);
499 }
500 
501 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
502 {
503         int ret;
504         unsigned long sw_blocked;
505 
506         if (no_bt_rfkill &&
507             (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
508                 /* Force to enable bluetooth when no_bt_rfkill=1 */
509                 write_ec_cmd(priv->adev->handle,
510                              ideapad_rfk_data[dev].opcode, 1);
511                 return 0;
512         }
513         priv->rfk_priv[dev].dev = dev;
514         priv->rfk_priv[dev].priv = priv;
515 
516         priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
517                                       &priv->platform_device->dev,
518                                       ideapad_rfk_data[dev].type,
519                                       &ideapad_rfk_ops,
520                                       &priv->rfk_priv[dev]);
521         if (!priv->rfk[dev])
522                 return -ENOMEM;
523 
524         if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
525                          &sw_blocked)) {
526                 rfkill_init_sw_state(priv->rfk[dev], 0);
527         } else {
528                 sw_blocked = !sw_blocked;
529                 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
530         }
531 
532         ret = rfkill_register(priv->rfk[dev]);
533         if (ret) {
534                 rfkill_destroy(priv->rfk[dev]);
535                 return ret;
536         }
537         return 0;
538 }
539 
540 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
541 {
542         if (!priv->rfk[dev])
543                 return;
544 
545         rfkill_unregister(priv->rfk[dev]);
546         rfkill_destroy(priv->rfk[dev]);
547 }
548 
549 /*
550  * Platform device
551  */
552 static int ideapad_sysfs_init(struct ideapad_private *priv)
553 {
554         return sysfs_create_group(&priv->platform_device->dev.kobj,
555                                     &ideapad_attribute_group);
556 }
557 
558 static void ideapad_sysfs_exit(struct ideapad_private *priv)
559 {
560         sysfs_remove_group(&priv->platform_device->dev.kobj,
561                            &ideapad_attribute_group);
562 }
563 
564 /*
565  * input device
566  */
567 static const struct key_entry ideapad_keymap[] = {
568         { KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
569         { KE_KEY, 7,  { KEY_CAMERA } },
570         { KE_KEY, 8,  { KEY_MICMUTE } },
571         { KE_KEY, 11, { KEY_F16 } },
572         { KE_KEY, 13, { KEY_WLAN } },
573         { KE_KEY, 16, { KEY_PROG1 } },
574         { KE_KEY, 17, { KEY_PROG2 } },
575         { KE_KEY, 64, { KEY_PROG3 } },
576         { KE_KEY, 65, { KEY_PROG4 } },
577         { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
578         { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
579         { KE_KEY, 128, { KEY_ESC } },
580 
581         { KE_END, 0 },
582 };
583 
584 static int ideapad_input_init(struct ideapad_private *priv)
585 {
586         struct input_dev *inputdev;
587         int error;
588 
589         inputdev = input_allocate_device();
590         if (!inputdev)
591                 return -ENOMEM;
592 
593         inputdev->name = "Ideapad extra buttons";
594         inputdev->phys = "ideapad/input0";
595         inputdev->id.bustype = BUS_HOST;
596         inputdev->dev.parent = &priv->platform_device->dev;
597 
598         error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
599         if (error) {
600                 pr_err("Unable to setup input device keymap\n");
601                 goto err_free_dev;
602         }
603 
604         error = input_register_device(inputdev);
605         if (error) {
606                 pr_err("Unable to register input device\n");
607                 goto err_free_keymap;
608         }
609 
610         priv->inputdev = inputdev;
611         return 0;
612 
613 err_free_keymap:
614         sparse_keymap_free(inputdev);
615 err_free_dev:
616         input_free_device(inputdev);
617         return error;
618 }
619 
620 static void ideapad_input_exit(struct ideapad_private *priv)
621 {
622         sparse_keymap_free(priv->inputdev);
623         input_unregister_device(priv->inputdev);
624         priv->inputdev = NULL;
625 }
626 
627 static void ideapad_input_report(struct ideapad_private *priv,
628                                  unsigned long scancode)
629 {
630         sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
631 }
632 
633 static void ideapad_input_novokey(struct ideapad_private *priv)
634 {
635         unsigned long long_pressed;
636 
637         if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
638                 return;
639         if (long_pressed)
640                 ideapad_input_report(priv, 17);
641         else
642                 ideapad_input_report(priv, 16);
643 }
644 
645 static void ideapad_check_special_buttons(struct ideapad_private *priv)
646 {
647         unsigned long bit, value;
648 
649         read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
650 
651         for (bit = 0; bit < 16; bit++) {
652                 if (test_bit(bit, &value)) {
653                         switch (bit) {
654                         case 0: /* Z580 */
655                         case 6: /* Z570 */
656                                 /* Thermal Management button */
657                                 ideapad_input_report(priv, 65);
658                                 break;
659                         case 1:
660                                 /* OneKey Theater button */
661                                 ideapad_input_report(priv, 64);
662                                 break;
663                         default:
664                                 pr_info("Unknown special button: %lu\n", bit);
665                                 break;
666                         }
667                 }
668         }
669 }
670 
671 /*
672  * backlight
673  */
674 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
675 {
676         struct ideapad_private *priv = bl_get_data(blightdev);
677         unsigned long now;
678 
679         if (!priv)
680                 return -EINVAL;
681 
682         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
683                 return -EIO;
684         return now;
685 }
686 
687 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
688 {
689         struct ideapad_private *priv = bl_get_data(blightdev);
690 
691         if (!priv)
692                 return -EINVAL;
693 
694         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
695                          blightdev->props.brightness))
696                 return -EIO;
697         if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
698                          blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
699                 return -EIO;
700 
701         return 0;
702 }
703 
704 static const struct backlight_ops ideapad_backlight_ops = {
705         .get_brightness = ideapad_backlight_get_brightness,
706         .update_status = ideapad_backlight_update_status,
707 };
708 
709 static int ideapad_backlight_init(struct ideapad_private *priv)
710 {
711         struct backlight_device *blightdev;
712         struct backlight_properties props;
713         unsigned long max, now, power;
714 
715         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
716                 return -EIO;
717         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
718                 return -EIO;
719         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
720                 return -EIO;
721 
722         memset(&props, 0, sizeof(struct backlight_properties));
723         props.max_brightness = max;
724         props.type = BACKLIGHT_PLATFORM;
725         blightdev = backlight_device_register("ideapad",
726                                               &priv->platform_device->dev,
727                                               priv,
728                                               &ideapad_backlight_ops,
729                                               &props);
730         if (IS_ERR(blightdev)) {
731                 pr_err("Could not register backlight device\n");
732                 return PTR_ERR(blightdev);
733         }
734 
735         priv->blightdev = blightdev;
736         blightdev->props.brightness = now;
737         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
738         backlight_update_status(blightdev);
739 
740         return 0;
741 }
742 
743 static void ideapad_backlight_exit(struct ideapad_private *priv)
744 {
745         backlight_device_unregister(priv->blightdev);
746         priv->blightdev = NULL;
747 }
748 
749 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
750 {
751         unsigned long power;
752         struct backlight_device *blightdev = priv->blightdev;
753 
754         if (!blightdev)
755                 return;
756         if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
757                 return;
758         blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
759 }
760 
761 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
762 {
763         unsigned long now;
764 
765         /* if we control brightness via acpi video driver */
766         if (priv->blightdev == NULL) {
767                 read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
768                 return;
769         }
770 
771         backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
772 }
773 
774 /*
775  * module init/exit
776  */
777 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
778 {
779         unsigned long value;
780 
781         /* Without reading from EC touchpad LED doesn't switch state */
782         if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
783                 /* Some IdeaPads don't really turn off touchpad - they only
784                  * switch the LED state. We (de)activate KBC AUX port to turn
785                  * touchpad off and on. We send KEY_TOUCHPAD_OFF and
786                  * KEY_TOUCHPAD_ON to not to get out of sync with LED */
787                 unsigned char param;
788                 i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
789                               I8042_CMD_AUX_DISABLE);
790                 ideapad_input_report(priv, value ? 67 : 66);
791         }
792 }
793 
794 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
795 {
796         struct ideapad_private *priv = data;
797         unsigned long vpc1, vpc2, vpc_bit;
798 
799         if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
800                 return;
801         if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
802                 return;
803 
804         vpc1 = (vpc2 << 8) | vpc1;
805         for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
806                 if (test_bit(vpc_bit, &vpc1)) {
807                         switch (vpc_bit) {
808                         case 9:
809                                 ideapad_sync_rfk_state(priv);
810                                 break;
811                         case 13:
812                         case 11:
813                         case 8:
814                         case 7:
815                         case 6:
816                                 ideapad_input_report(priv, vpc_bit);
817                                 break;
818                         case 5:
819                                 ideapad_sync_touchpad_state(priv);
820                                 break;
821                         case 4:
822                                 ideapad_backlight_notify_brightness(priv);
823                                 break;
824                         case 3:
825                                 ideapad_input_novokey(priv);
826                                 break;
827                         case 2:
828                                 ideapad_backlight_notify_power(priv);
829                                 break;
830                         case 0:
831                                 ideapad_check_special_buttons(priv);
832                                 break;
833                         default:
834                                 pr_info("Unknown event: %lu\n", vpc_bit);
835                         }
836                 }
837         }
838 }
839 
840 #if IS_ENABLED(CONFIG_ACPI_WMI)
841 static void ideapad_wmi_notify(u32 value, void *context)
842 {
843         switch (value) {
844         case 128:
845                 ideapad_input_report(context, value);
846                 break;
847         default:
848                 pr_info("Unknown WMI event %u\n", value);
849         }
850 }
851 #endif
852 
853 /*
854  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
855  * always results in 0 on these models, causing ideapad_laptop to wrongly
856  * report all radios as hardware-blocked.
857  */
858 static const struct dmi_system_id no_hw_rfkill_list[] = {
859         {
860                 .ident = "Lenovo G40-30",
861                 .matches = {
862                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
863                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
864                 },
865         },
866         {
867                 .ident = "Lenovo G50-30",
868                 .matches = {
869                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
870                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
871                 },
872         },
873         {
874                 .ident = "Lenovo ideapad Y700-15ISK",
875                 .matches = {
876                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
877                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
878                 },
879         },
880         {
881                 .ident = "Lenovo ideapad Y700 Touch-15ISK",
882                 .matches = {
883                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
884                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
885                 },
886         },
887         {
888                 .ident = "Lenovo ideapad Y700-17ISK",
889                 .matches = {
890                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
891                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
892                 },
893         },
894         {
895                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
896                 .matches = {
897                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
898                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
899                 },
900         },
901         {
902                 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
903                 .matches = {
904                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
905                         DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
906                 },
907         },
908         {
909                 .ident = "Lenovo Yoga 3 1170 / 1470",
910                 .matches = {
911                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
912                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"),
913                 },
914         },
915         {
916                 .ident = "Lenovo Yoga 3 Pro 1370",
917                 .matches = {
918                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
919                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
920                 },
921         },
922         {
923                 .ident = "Lenovo Yoga 700",
924                 .matches = {
925                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
926                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
927                 },
928         },
929         {
930                 .ident = "Lenovo Yoga 900",
931                 .matches = {
932                         DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
933                         DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
934                 },
935         },
936         {}
937 };
938 
939 static int ideapad_acpi_add(struct platform_device *pdev)
940 {
941         int ret, i;
942         int cfg;
943         struct ideapad_private *priv;
944         struct acpi_device *adev;
945 
946         ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
947         if (ret)
948                 return -ENODEV;
949 
950         if (read_method_int(adev->handle, "_CFG", &cfg))
951                 return -ENODEV;
952 
953         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
954         if (!priv)
955                 return -ENOMEM;
956 
957         dev_set_drvdata(&pdev->dev, priv);
958         priv->cfg = cfg;
959         priv->adev = adev;
960         priv->platform_device = pdev;
961         priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
962 
963         ret = ideapad_sysfs_init(priv);
964         if (ret)
965                 return ret;
966 
967         ret = ideapad_debugfs_init(priv);
968         if (ret)
969                 goto debugfs_failed;
970 
971         ret = ideapad_input_init(priv);
972         if (ret)
973                 goto input_failed;
974 
975         /*
976          * On some models without a hw-switch (the yoga 2 13 at least)
977          * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
978          */
979         if (!priv->has_hw_rfkill_switch)
980                 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
981 
982         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
983                 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
984                         ideapad_register_rfkill(priv, i);
985 
986         ideapad_sync_rfk_state(priv);
987         ideapad_sync_touchpad_state(priv);
988 
989         if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
990                 ret = ideapad_backlight_init(priv);
991                 if (ret && ret != -ENODEV)
992                         goto backlight_failed;
993         }
994         ret = acpi_install_notify_handler(adev->handle,
995                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
996         if (ret)
997                 goto notification_failed;
998 
999 #if IS_ENABLED(CONFIG_ACPI_WMI)
1000         for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1001                 ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1002                                                  ideapad_wmi_notify, priv);
1003                 if (ret == AE_OK) {
1004                         priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1005                         break;
1006                 }
1007         }
1008         if (ret != AE_OK && ret != AE_NOT_EXIST)
1009                 goto notification_failed_wmi;
1010 #endif
1011 
1012         return 0;
1013 #if IS_ENABLED(CONFIG_ACPI_WMI)
1014 notification_failed_wmi:
1015         acpi_remove_notify_handler(priv->adev->handle,
1016                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1017 #endif
1018 notification_failed:
1019         ideapad_backlight_exit(priv);
1020 backlight_failed:
1021         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1022                 ideapad_unregister_rfkill(priv, i);
1023         ideapad_input_exit(priv);
1024 input_failed:
1025         ideapad_debugfs_exit(priv);
1026 debugfs_failed:
1027         ideapad_sysfs_exit(priv);
1028         return ret;
1029 }
1030 
1031 static int ideapad_acpi_remove(struct platform_device *pdev)
1032 {
1033         struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1034         int i;
1035 
1036 #if IS_ENABLED(CONFIG_ACPI_WMI)
1037         if (priv->fnesc_guid)
1038                 wmi_remove_notify_handler(priv->fnesc_guid);
1039 #endif
1040         acpi_remove_notify_handler(priv->adev->handle,
1041                 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1042         ideapad_backlight_exit(priv);
1043         for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1044                 ideapad_unregister_rfkill(priv, i);
1045         ideapad_input_exit(priv);
1046         ideapad_debugfs_exit(priv);
1047         ideapad_sysfs_exit(priv);
1048         dev_set_drvdata(&pdev->dev, NULL);
1049 
1050         return 0;
1051 }
1052 
1053 #ifdef CONFIG_PM_SLEEP
1054 static int ideapad_acpi_resume(struct device *device)
1055 {
1056         struct ideapad_private *priv;
1057 
1058         if (!device)
1059                 return -EINVAL;
1060         priv = dev_get_drvdata(device);
1061 
1062         ideapad_sync_rfk_state(priv);
1063         ideapad_sync_touchpad_state(priv);
1064         return 0;
1065 }
1066 #endif
1067 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1068 
1069 static const struct acpi_device_id ideapad_device_ids[] = {
1070         { "VPC2004", 0},
1071         { "", 0},
1072 };
1073 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1074 
1075 static struct platform_driver ideapad_acpi_driver = {
1076         .probe = ideapad_acpi_add,
1077         .remove = ideapad_acpi_remove,
1078         .driver = {
1079                 .name   = "ideapad_acpi",
1080                 .pm     = &ideapad_pm,
1081                 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1082         },
1083 };
1084 
1085 module_platform_driver(ideapad_acpi_driver);
1086 
1087 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1088 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1089 MODULE_LICENSE("GPL");
1090 

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