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
read_method_int(acpi_handle handle,const char * method,int * val)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
method_vpcr(acpi_handle handle,int cmd,int * ret)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", ¶ms, &result);
130
131 if (ACPI_FAILURE(status)) {
132 *ret = -1;
133 return -1;
134 } else {
135 *ret = result;
136 return 0;
137 }
138 }
139
method_vpcw(acpi_handle handle,int cmd,int data)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", ¶ms, NULL);
154 if (status != AE_OK)
155 return -1;
156 return 0;
157 }
158
read_ec_data(acpi_handle handle,int cmd,unsigned long * data)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
write_ec_cmd(acpi_handle handle,int cmd,unsigned long data)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 */
debugfs_status_show(struct seq_file * s,void * data)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
debugfs_status_open(struct inode * inode,struct file * file)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
debugfs_cfg_show(struct seq_file * s,void * data)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
debugfs_cfg_open(struct inode * inode,struct file * file)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
ideapad_debugfs_init(struct ideapad_private * priv)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
ideapad_debugfs_exit(struct ideapad_private * priv)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 */
show_ideapad_cam(struct device * dev,struct device_attribute * attr,char * buf)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
store_ideapad_cam(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
show_ideapad_fan(struct device * dev,struct device_attribute * attr,char * buf)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
store_ideapad_fan(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)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
ideapad_is_visible(struct kobject * kobj,struct attribute * attr,int idx)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
ideapad_rfk_set(void * data,bool blocked)464 static int ideapad_rfk_set(void *data, bool blocked)
465 {
466 struct ideapad_rfk_priv *priv = data;
467 int opcode = ideapad_rfk_data[priv->dev].opcode;
468
469 return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
470 }
471
472 static struct rfkill_ops ideapad_rfk_ops = {
473 .set_block = ideapad_rfk_set,
474 };
475
ideapad_sync_rfk_state(struct ideapad_private * priv)476 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
477 {
478 unsigned long hw_blocked = 0;
479 int i;
480
481 if (priv->has_hw_rfkill_switch) {
482 if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
483 return;
484 hw_blocked = !hw_blocked;
485 }
486
487 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
488 if (priv->rfk[i])
489 rfkill_set_hw_state(priv->rfk[i], hw_blocked);
490 }
491
ideapad_register_rfkill(struct ideapad_private * priv,int dev)492 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
493 {
494 int ret;
495 unsigned long sw_blocked;
496
497 if (no_bt_rfkill &&
498 (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
499 /* Force to enable bluetooth when no_bt_rfkill=1 */
500 write_ec_cmd(priv->adev->handle,
501 ideapad_rfk_data[dev].opcode, 1);
502 return 0;
503 }
504 priv->rfk_priv[dev].dev = dev;
505 priv->rfk_priv[dev].priv = priv;
506
507 priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
508 &priv->platform_device->dev,
509 ideapad_rfk_data[dev].type,
510 &ideapad_rfk_ops,
511 &priv->rfk_priv[dev]);
512 if (!priv->rfk[dev])
513 return -ENOMEM;
514
515 if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
516 &sw_blocked)) {
517 rfkill_init_sw_state(priv->rfk[dev], 0);
518 } else {
519 sw_blocked = !sw_blocked;
520 rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
521 }
522
523 ret = rfkill_register(priv->rfk[dev]);
524 if (ret) {
525 rfkill_destroy(priv->rfk[dev]);
526 return ret;
527 }
528 return 0;
529 }
530
ideapad_unregister_rfkill(struct ideapad_private * priv,int dev)531 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
532 {
533 if (!priv->rfk[dev])
534 return;
535
536 rfkill_unregister(priv->rfk[dev]);
537 rfkill_destroy(priv->rfk[dev]);
538 }
539
540 /*
541 * Platform device
542 */
ideapad_sysfs_init(struct ideapad_private * priv)543 static int ideapad_sysfs_init(struct ideapad_private *priv)
544 {
545 return sysfs_create_group(&priv->platform_device->dev.kobj,
546 &ideapad_attribute_group);
547 }
548
ideapad_sysfs_exit(struct ideapad_private * priv)549 static void ideapad_sysfs_exit(struct ideapad_private *priv)
550 {
551 sysfs_remove_group(&priv->platform_device->dev.kobj,
552 &ideapad_attribute_group);
553 }
554
555 /*
556 * input device
557 */
558 static const struct key_entry ideapad_keymap[] = {
559 { KE_KEY, 6, { KEY_SWITCHVIDEOMODE } },
560 { KE_KEY, 7, { KEY_CAMERA } },
561 { KE_KEY, 11, { KEY_F16 } },
562 { KE_KEY, 13, { KEY_WLAN } },
563 { KE_KEY, 16, { KEY_PROG1 } },
564 { KE_KEY, 17, { KEY_PROG2 } },
565 { KE_KEY, 64, { KEY_PROG3 } },
566 { KE_KEY, 65, { KEY_PROG4 } },
567 { KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
568 { KE_KEY, 67, { KEY_TOUCHPAD_ON } },
569 { KE_END, 0 },
570 };
571
ideapad_input_init(struct ideapad_private * priv)572 static int ideapad_input_init(struct ideapad_private *priv)
573 {
574 struct input_dev *inputdev;
575 int error;
576
577 inputdev = input_allocate_device();
578 if (!inputdev)
579 return -ENOMEM;
580
581 inputdev->name = "Ideapad extra buttons";
582 inputdev->phys = "ideapad/input0";
583 inputdev->id.bustype = BUS_HOST;
584 inputdev->dev.parent = &priv->platform_device->dev;
585
586 error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
587 if (error) {
588 pr_err("Unable to setup input device keymap\n");
589 goto err_free_dev;
590 }
591
592 error = input_register_device(inputdev);
593 if (error) {
594 pr_err("Unable to register input device\n");
595 goto err_free_keymap;
596 }
597
598 priv->inputdev = inputdev;
599 return 0;
600
601 err_free_keymap:
602 sparse_keymap_free(inputdev);
603 err_free_dev:
604 input_free_device(inputdev);
605 return error;
606 }
607
ideapad_input_exit(struct ideapad_private * priv)608 static void ideapad_input_exit(struct ideapad_private *priv)
609 {
610 sparse_keymap_free(priv->inputdev);
611 input_unregister_device(priv->inputdev);
612 priv->inputdev = NULL;
613 }
614
ideapad_input_report(struct ideapad_private * priv,unsigned long scancode)615 static void ideapad_input_report(struct ideapad_private *priv,
616 unsigned long scancode)
617 {
618 sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
619 }
620
ideapad_input_novokey(struct ideapad_private * priv)621 static void ideapad_input_novokey(struct ideapad_private *priv)
622 {
623 unsigned long long_pressed;
624
625 if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
626 return;
627 if (long_pressed)
628 ideapad_input_report(priv, 17);
629 else
630 ideapad_input_report(priv, 16);
631 }
632
ideapad_check_special_buttons(struct ideapad_private * priv)633 static void ideapad_check_special_buttons(struct ideapad_private *priv)
634 {
635 unsigned long bit, value;
636
637 read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
638
639 for (bit = 0; bit < 16; bit++) {
640 if (test_bit(bit, &value)) {
641 switch (bit) {
642 case 0: /* Z580 */
643 case 6: /* Z570 */
644 /* Thermal Management button */
645 ideapad_input_report(priv, 65);
646 break;
647 case 1:
648 /* OneKey Theater button */
649 ideapad_input_report(priv, 64);
650 break;
651 default:
652 pr_info("Unknown special button: %lu\n", bit);
653 break;
654 }
655 }
656 }
657 }
658
659 /*
660 * backlight
661 */
ideapad_backlight_get_brightness(struct backlight_device * blightdev)662 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
663 {
664 struct ideapad_private *priv = bl_get_data(blightdev);
665 unsigned long now;
666
667 if (!priv)
668 return -EINVAL;
669
670 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
671 return -EIO;
672 return now;
673 }
674
ideapad_backlight_update_status(struct backlight_device * blightdev)675 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
676 {
677 struct ideapad_private *priv = bl_get_data(blightdev);
678
679 if (!priv)
680 return -EINVAL;
681
682 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
683 blightdev->props.brightness))
684 return -EIO;
685 if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
686 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
687 return -EIO;
688
689 return 0;
690 }
691
692 static const struct backlight_ops ideapad_backlight_ops = {
693 .get_brightness = ideapad_backlight_get_brightness,
694 .update_status = ideapad_backlight_update_status,
695 };
696
ideapad_backlight_init(struct ideapad_private * priv)697 static int ideapad_backlight_init(struct ideapad_private *priv)
698 {
699 struct backlight_device *blightdev;
700 struct backlight_properties props;
701 unsigned long max, now, power;
702
703 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
704 return -EIO;
705 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
706 return -EIO;
707 if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
708 return -EIO;
709
710 memset(&props, 0, sizeof(struct backlight_properties));
711 props.max_brightness = max;
712 props.type = BACKLIGHT_PLATFORM;
713 blightdev = backlight_device_register("ideapad",
714 &priv->platform_device->dev,
715 priv,
716 &ideapad_backlight_ops,
717 &props);
718 if (IS_ERR(blightdev)) {
719 pr_err("Could not register backlight device\n");
720 return PTR_ERR(blightdev);
721 }
722
723 priv->blightdev = blightdev;
724 blightdev->props.brightness = now;
725 blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
726 backlight_update_status(blightdev);
727
728 return 0;
729 }
730
ideapad_backlight_exit(struct ideapad_private * priv)731 static void ideapad_backlight_exit(struct ideapad_private *priv)
732 {
733 backlight_device_unregister(priv->blightdev);
734 priv->blightdev = NULL;
735 }
736
ideapad_backlight_notify_power(struct ideapad_private * priv)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
ideapad_backlight_notify_brightness(struct ideapad_private * priv)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 */
ideapad_sync_touchpad_state(struct ideapad_private * priv)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(¶m, value ? I8042_CMD_AUX_ENABLE :
777 I8042_CMD_AUX_DISABLE);
778 ideapad_input_report(priv, value ? 67 : 66);
779 }
780 }
781
ideapad_acpi_notify(acpi_handle handle,u32 event,void * data)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 G40-30",
835 .matches = {
836 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
837 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
838 },
839 },
840 {
841 .ident = "Lenovo G50-30",
842 .matches = {
843 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
844 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
845 },
846 },
847 {
848 .ident = "Lenovo ideapad Y700-15ISK",
849 .matches = {
850 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
851 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
852 },
853 },
854 {
855 .ident = "Lenovo ideapad Y700 Touch-15ISK",
856 .matches = {
857 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
858 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
859 },
860 },
861 {
862 .ident = "Lenovo ideapad Y700-17ISK",
863 .matches = {
864 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
865 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
866 },
867 },
868 {
869 .ident = "Lenovo Yoga 2 11 / 13 / Pro",
870 .matches = {
871 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
872 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
873 },
874 },
875 {
876 .ident = "Lenovo Yoga 3 14",
877 .matches = {
878 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
879 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3 14"),
880 },
881 },
882 {
883 .ident = "Lenovo Yoga 3 Pro 1370",
884 .matches = {
885 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
886 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3 Pro-1370"),
887 },
888 },
889 {
890 .ident = "Lenovo Yoga 700",
891 .matches = {
892 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
893 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
894 },
895 },
896 {
897 .ident = "Lenovo Yoga 900",
898 .matches = {
899 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
900 DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
901 },
902 },
903 {}
904 };
905
ideapad_acpi_add(struct platform_device * pdev)906 static int ideapad_acpi_add(struct platform_device *pdev)
907 {
908 int ret, i;
909 int cfg;
910 struct ideapad_private *priv;
911 struct acpi_device *adev;
912
913 ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
914 if (ret)
915 return -ENODEV;
916
917 if (read_method_int(adev->handle, "_CFG", &cfg))
918 return -ENODEV;
919
920 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
921 if (!priv)
922 return -ENOMEM;
923
924 dev_set_drvdata(&pdev->dev, priv);
925 priv->cfg = cfg;
926 priv->adev = adev;
927 priv->platform_device = pdev;
928 priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
929
930 ret = ideapad_sysfs_init(priv);
931 if (ret)
932 return ret;
933
934 ret = ideapad_debugfs_init(priv);
935 if (ret)
936 goto debugfs_failed;
937
938 ret = ideapad_input_init(priv);
939 if (ret)
940 goto input_failed;
941
942 /*
943 * On some models without a hw-switch (the yoga 2 13 at least)
944 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
945 */
946 if (!priv->has_hw_rfkill_switch)
947 write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
948
949 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
950 if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
951 ideapad_register_rfkill(priv, i);
952
953 ideapad_sync_rfk_state(priv);
954 ideapad_sync_touchpad_state(priv);
955
956 if (!acpi_video_backlight_support()) {
957 ret = ideapad_backlight_init(priv);
958 if (ret && ret != -ENODEV)
959 goto backlight_failed;
960 }
961 ret = acpi_install_notify_handler(adev->handle,
962 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
963 if (ret)
964 goto notification_failed;
965
966 return 0;
967 notification_failed:
968 ideapad_backlight_exit(priv);
969 backlight_failed:
970 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
971 ideapad_unregister_rfkill(priv, i);
972 ideapad_input_exit(priv);
973 input_failed:
974 ideapad_debugfs_exit(priv);
975 debugfs_failed:
976 ideapad_sysfs_exit(priv);
977 return ret;
978 }
979
ideapad_acpi_remove(struct platform_device * pdev)980 static int ideapad_acpi_remove(struct platform_device *pdev)
981 {
982 struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
983 int i;
984
985 acpi_remove_notify_handler(priv->adev->handle,
986 ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
987 ideapad_backlight_exit(priv);
988 for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
989 ideapad_unregister_rfkill(priv, i);
990 ideapad_input_exit(priv);
991 ideapad_debugfs_exit(priv);
992 ideapad_sysfs_exit(priv);
993 dev_set_drvdata(&pdev->dev, NULL);
994
995 return 0;
996 }
997
998 #ifdef CONFIG_PM_SLEEP
ideapad_acpi_resume(struct device * device)999 static int ideapad_acpi_resume(struct device *device)
1000 {
1001 struct ideapad_private *priv;
1002
1003 if (!device)
1004 return -EINVAL;
1005 priv = dev_get_drvdata(device);
1006
1007 ideapad_sync_rfk_state(priv);
1008 ideapad_sync_touchpad_state(priv);
1009 return 0;
1010 }
1011 #endif
1012 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1013
1014 static const struct acpi_device_id ideapad_device_ids[] = {
1015 { "VPC2004", 0},
1016 { "", 0},
1017 };
1018 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1019
1020 static struct platform_driver ideapad_acpi_driver = {
1021 .probe = ideapad_acpi_add,
1022 .remove = ideapad_acpi_remove,
1023 .driver = {
1024 .name = "ideapad_acpi",
1025 .pm = &ideapad_pm,
1026 .acpi_match_table = ACPI_PTR(ideapad_device_ids),
1027 },
1028 };
1029
1030 module_platform_driver(ideapad_acpi_driver);
1031
1032 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1033 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1034 MODULE_LICENSE("GPL");
1035