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32#include <linux/kernel.h>
33#include <linux/errno.h>
34#include <linux/init.h>
35#include <linux/slab.h>
36#include <linux/module.h>
37#include <linux/usb.h>
38#include <linux/platform_device.h>
39#include <linux/ctype.h>
40
41#define ASUS_OLED_VERSION "0.04-dev"
42#define ASUS_OLED_NAME "asus-oled"
43#define ASUS_OLED_UNDERSCORE_NAME "asus_oled"
44
45#define ASUS_OLED_STATIC 's'
46#define ASUS_OLED_ROLL 'r'
47#define ASUS_OLED_FLASH 'f'
48
49#define ASUS_OLED_MAX_WIDTH 1792
50#define ASUS_OLED_DISP_HEIGHT 32
51#define ASUS_OLED_PACKET_BUF_SIZE 256
52
53#define USB_VENDOR_ID_ASUS 0x0b05
54#define USB_DEVICE_ID_ASUS_LCM 0x1726
55#define USB_DEVICE_ID_ASUS_LCM2 0x175b
56
57MODULE_AUTHOR("Jakub Schmidtke, sjakub@gmail.com");
58MODULE_DESCRIPTION("Asus OLED Driver");
59MODULE_LICENSE("GPL");
60MODULE_VERSION(ASUS_OLED_VERSION);
61
62static struct class *oled_class;
63static int oled_num;
64
65static uint start_off;
66
67module_param(start_off, uint, 0644);
68
69MODULE_PARM_DESC(start_off,
70 "Set to 1 to switch off OLED display after it is attached");
71
72enum oled_pack_mode {
73 PACK_MODE_G1,
74 PACK_MODE_G50,
75 PACK_MODE_LAST
76};
77
78struct oled_dev_desc_str {
79 uint16_t idVendor;
80 uint16_t idProduct;
81
82 uint16_t devWidth;
83
84 enum oled_pack_mode packMode;
85 const char *devDesc;
86};
87
88
89static const struct usb_device_id id_table[] = {
90
91 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM) },
92
93 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2) },
94 { },
95};
96
97
98static struct oled_dev_desc_str oled_dev_desc_table[] = {
99 { USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM, 128, PACK_MODE_G1,
100 "G1/G2" },
101 { USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2, 256, PACK_MODE_G50,
102 "G50" },
103 { },
104};
105
106MODULE_DEVICE_TABLE(usb, id_table);
107
108struct asus_oled_header {
109 uint8_t magic1;
110 uint8_t magic2;
111 uint8_t flags;
112 uint8_t value3;
113 uint8_t buffer1;
114 uint8_t buffer2;
115 uint8_t value6;
116 uint8_t value7;
117 uint8_t value8;
118 uint8_t padding2[7];
119} __attribute((packed));
120
121struct asus_oled_packet {
122 struct asus_oled_header header;
123 uint8_t bitmap[ASUS_OLED_PACKET_BUF_SIZE];
124} __attribute((packed));
125
126struct asus_oled_dev {
127 struct usb_device *udev;
128 uint8_t pic_mode;
129 uint16_t dev_width;
130 enum oled_pack_mode pack_mode;
131 size_t height;
132 size_t width;
133 size_t x_shift;
134 size_t y_shift;
135 size_t buf_offs;
136 uint8_t last_val;
137 size_t buf_size;
138 char *buf;
139 uint8_t enabled;
140 uint8_t enabled_post_resume;
141 struct device *dev;
142};
143
144static void setup_packet_header(struct asus_oled_packet *packet, char flags,
145 char value3, char buffer1, char buffer2, char value6,
146 char value7, char value8)
147{
148 memset(packet, 0, sizeof(struct asus_oled_header));
149 packet->header.magic1 = 0x55;
150 packet->header.magic2 = 0xaa;
151 packet->header.flags = flags;
152 packet->header.value3 = value3;
153 packet->header.buffer1 = buffer1;
154 packet->header.buffer2 = buffer2;
155 packet->header.value6 = value6;
156 packet->header.value7 = value7;
157 packet->header.value8 = value8;
158}
159
160static void enable_oled(struct asus_oled_dev *odev, uint8_t enabl)
161{
162 int retval;
163 int act_len;
164 struct asus_oled_packet *packet;
165
166 packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
167 if (!packet)
168 return;
169
170 setup_packet_header(packet, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00);
171
172 if (enabl)
173 packet->bitmap[0] = 0xaf;
174 else
175 packet->bitmap[0] = 0xae;
176
177 retval = usb_bulk_msg(odev->udev,
178 usb_sndbulkpipe(odev->udev, 2),
179 packet,
180 sizeof(struct asus_oled_header) + 1,
181 &act_len,
182 -1);
183
184 if (retval)
185 dev_dbg(&odev->udev->dev, "retval = %d\n", retval);
186
187 odev->enabled = enabl;
188
189 kfree(packet);
190}
191
192static ssize_t set_enabled(struct device *dev, struct device_attribute *attr,
193 const char *buf, size_t count)
194{
195 struct usb_interface *intf = to_usb_interface(dev);
196 struct asus_oled_dev *odev = usb_get_intfdata(intf);
197 unsigned long value;
198 if (kstrtoul(buf, 10, &value))
199 return -EINVAL;
200
201 enable_oled(odev, value);
202
203 return count;
204}
205
206static ssize_t class_set_enabled(struct device *device,
207 struct device_attribute *attr,
208 const char *buf, size_t count)
209{
210 struct asus_oled_dev *odev =
211 (struct asus_oled_dev *) dev_get_drvdata(device);
212 unsigned long value;
213
214 if (kstrtoul(buf, 10, &value))
215 return -EINVAL;
216
217 enable_oled(odev, value);
218
219 return count;
220}
221
222static ssize_t get_enabled(struct device *dev, struct device_attribute *attr,
223 char *buf)
224{
225 struct usb_interface *intf = to_usb_interface(dev);
226 struct asus_oled_dev *odev = usb_get_intfdata(intf);
227
228 return sprintf(buf, "%d\n", odev->enabled);
229}
230
231static ssize_t class_get_enabled(struct device *device,
232 struct device_attribute *attr, char *buf)
233{
234 struct asus_oled_dev *odev =
235 (struct asus_oled_dev *) dev_get_drvdata(device);
236
237 return sprintf(buf, "%d\n", odev->enabled);
238}
239
240static void send_packets(struct usb_device *udev,
241 struct asus_oled_packet *packet,
242 char *buf, uint8_t p_type, size_t p_num)
243{
244 size_t i;
245 int act_len;
246
247 for (i = 0; i < p_num; i++) {
248 int retval;
249
250 switch (p_type) {
251 case ASUS_OLED_ROLL:
252 setup_packet_header(packet, 0x40, 0x80, p_num,
253 i + 1, 0x00, 0x01, 0xff);
254 break;
255 case ASUS_OLED_STATIC:
256 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
257 0x01, 0x00, 0x01, 0x00);
258 break;
259 case ASUS_OLED_FLASH:
260 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
261 0x01, 0x00, 0x00, 0xff);
262 break;
263 }
264
265 memcpy(packet->bitmap, buf + (ASUS_OLED_PACKET_BUF_SIZE*i),
266 ASUS_OLED_PACKET_BUF_SIZE);
267
268 retval = usb_bulk_msg(udev, usb_sndctrlpipe(udev, 2),
269 packet, sizeof(struct asus_oled_packet),
270 &act_len, -1);
271
272 if (retval)
273 dev_dbg(&udev->dev, "retval = %d\n", retval);
274 }
275}
276
277static void send_packet(struct usb_device *udev,
278 struct asus_oled_packet *packet,
279 size_t offset, size_t len, char *buf, uint8_t b1,
280 uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5,
281 uint8_t b6) {
282 int retval;
283 int act_len;
284
285 setup_packet_header(packet, b1, b2, b3, b4, b5, b6, 0x00);
286 memcpy(packet->bitmap, buf + offset, len);
287
288 retval = usb_bulk_msg(udev,
289 usb_sndctrlpipe(udev, 2),
290 packet,
291 sizeof(struct asus_oled_packet),
292 &act_len,
293 -1);
294
295 if (retval)
296 dev_dbg(&udev->dev, "retval = %d\n", retval);
297}
298
299
300static void send_packets_g50(struct usb_device *udev,
301 struct asus_oled_packet *packet, char *buf)
302{
303 send_packet(udev, packet, 0, 0x100, buf,
304 0x10, 0x00, 0x02, 0x01, 0x00, 0x01);
305 send_packet(udev, packet, 0x100, 0x080, buf,
306 0x10, 0x00, 0x02, 0x02, 0x80, 0x00);
307
308 send_packet(udev, packet, 0x180, 0x100, buf,
309 0x11, 0x00, 0x03, 0x01, 0x00, 0x01);
310 send_packet(udev, packet, 0x280, 0x100, buf,
311 0x11, 0x00, 0x03, 0x02, 0x00, 0x01);
312 send_packet(udev, packet, 0x380, 0x080, buf,
313 0x11, 0x00, 0x03, 0x03, 0x80, 0x00);
314}
315
316
317static void send_data(struct asus_oled_dev *odev)
318{
319 size_t packet_num = odev->buf_size / ASUS_OLED_PACKET_BUF_SIZE;
320 struct asus_oled_packet *packet;
321
322 packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
323 if (!packet)
324 return;
325
326 if (odev->pack_mode == PACK_MODE_G1) {
327
328
329
330 if (odev->pic_mode == ASUS_OLED_ROLL)
331 send_packets(odev->udev, packet, odev->buf,
332 ASUS_OLED_STATIC, 2);
333
334
335 if (odev->pic_mode != ASUS_OLED_ROLL && packet_num > 2)
336 packet_num = 2;
337
338 send_packets(odev->udev, packet, odev->buf,
339 odev->pic_mode, packet_num);
340 } else if (odev->pack_mode == PACK_MODE_G50) {
341 send_packets_g50(odev->udev, packet, odev->buf);
342 }
343
344 kfree(packet);
345}
346
347static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
348{
349 odev->last_val = val;
350
351 if (val == 0) {
352 odev->buf_offs += count;
353 return 0;
354 }
355
356 while (count-- > 0) {
357 size_t x = odev->buf_offs % odev->width;
358 size_t y = odev->buf_offs / odev->width;
359 size_t i;
360
361 x += odev->x_shift;
362 y += odev->y_shift;
363
364 switch (odev->pack_mode) {
365 case PACK_MODE_G1:
366
367
368
369 i = (x/odev->dev_width)*640 +
370 odev->dev_width - 1 - x +
371 (y/8)*odev->dev_width;
372 break;
373
374 case PACK_MODE_G50:
375 i = (odev->dev_width - 1 - x)/8 + y*odev->dev_width/8;
376 break;
377
378 default:
379 i = 0;
380 dev_err(odev->dev, "Unknown OLED Pack Mode: %d!\n",
381 odev->pack_mode);
382 break;
383 }
384
385 if (i >= odev->buf_size) {
386 dev_err(odev->dev, "Buffer overflow! Report a bug:"
387 "offs: %d >= %d i: %d (x: %d y: %d)\n",
388 (int) odev->buf_offs, (int) odev->buf_size,
389 (int) i, (int) x, (int) y);
390 return -EIO;
391 }
392
393 switch (odev->pack_mode) {
394 case PACK_MODE_G1:
395 odev->buf[i] &= ~(1<<(y%8));
396 break;
397
398 case PACK_MODE_G50:
399 odev->buf[i] &= ~(1<<(x%8));
400 break;
401
402 default:
403
404 ;
405 }
406
407 odev->buf_offs++;
408 }
409
410 return 0;
411}
412
413static ssize_t odev_set_picture(struct asus_oled_dev *odev,
414 const char *buf, size_t count)
415{
416 size_t offs = 0, max_offs;
417
418 if (count < 1)
419 return 0;
420
421 if (tolower(buf[0]) == 'b') {
422
423
424 size_t i;
425
426 odev->buf_size = (odev->dev_width * ASUS_OLED_DISP_HEIGHT) / 8;
427
428 kfree(odev->buf);
429 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
430 if (odev->buf == NULL) {
431 odev->buf_size = 0;
432 dev_err(odev->dev, "Out of memory!\n");
433 return -ENOMEM;
434 }
435
436 memset(odev->buf, 0xff, odev->buf_size);
437
438 for (i = 1; i < count && i <= 32 * 32; i++) {
439 odev->buf[i-1] = buf[i];
440 odev->buf_offs = i-1;
441 }
442
443 odev->width = odev->dev_width / 8;
444 odev->height = ASUS_OLED_DISP_HEIGHT;
445 odev->x_shift = 0;
446 odev->y_shift = 0;
447 odev->last_val = 0;
448
449 send_data(odev);
450
451 return count;
452 }
453
454 if (buf[0] == '<') {
455 size_t i;
456 size_t w = 0, h = 0;
457 size_t w_mem, h_mem;
458
459 if (count < 10 || buf[2] != ':')
460 goto error_header;
461
462
463 switch (tolower(buf[1])) {
464 case ASUS_OLED_STATIC:
465 case ASUS_OLED_ROLL:
466 case ASUS_OLED_FLASH:
467 odev->pic_mode = buf[1];
468 break;
469 default:
470 dev_err(odev->dev, "Wrong picture mode: '%c'.\n",
471 buf[1]);
472 return -EIO;
473 break;
474 }
475
476 for (i = 3; i < count; ++i) {
477 if (buf[i] >= '0' && buf[i] <= '9') {
478 w = 10*w + (buf[i] - '0');
479
480 if (w > ASUS_OLED_MAX_WIDTH)
481 goto error_width;
482 } else if (tolower(buf[i]) == 'x') {
483 break;
484 } else {
485 goto error_width;
486 }
487 }
488
489 for (++i; i < count; ++i) {
490 if (buf[i] >= '0' && buf[i] <= '9') {
491 h = 10*h + (buf[i] - '0');
492
493 if (h > ASUS_OLED_DISP_HEIGHT)
494 goto error_height;
495 } else if (tolower(buf[i]) == '>') {
496 break;
497 } else {
498 goto error_height;
499 }
500 }
501
502 if (w < 1 || w > ASUS_OLED_MAX_WIDTH)
503 goto error_width;
504
505 if (h < 1 || h > ASUS_OLED_DISP_HEIGHT)
506 goto error_height;
507
508 if (i >= count || buf[i] != '>')
509 goto error_header;
510
511 offs = i+1;
512
513 if (w % (odev->dev_width) != 0)
514 w_mem = (w/(odev->dev_width) + 1)*(odev->dev_width);
515 else
516 w_mem = w;
517
518 if (h < ASUS_OLED_DISP_HEIGHT)
519 h_mem = ASUS_OLED_DISP_HEIGHT;
520 else
521 h_mem = h;
522
523 odev->buf_size = w_mem * h_mem / 8;
524
525 kfree(odev->buf);
526 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
527
528 if (odev->buf == NULL) {
529 odev->buf_size = 0;
530 dev_err(odev->dev, "Out of memory!\n");
531 return -ENOMEM;
532 }
533
534 memset(odev->buf, 0xff, odev->buf_size);
535
536 odev->buf_offs = 0;
537 odev->width = w;
538 odev->height = h;
539 odev->x_shift = 0;
540 odev->y_shift = 0;
541 odev->last_val = 0;
542
543 if (odev->pic_mode == ASUS_OLED_FLASH) {
544 if (h < ASUS_OLED_DISP_HEIGHT/2)
545 odev->y_shift = (ASUS_OLED_DISP_HEIGHT/2 - h)/2;
546 } else {
547 if (h < ASUS_OLED_DISP_HEIGHT)
548 odev->y_shift = (ASUS_OLED_DISP_HEIGHT - h)/2;
549 }
550
551 if (w < (odev->dev_width))
552 odev->x_shift = ((odev->dev_width) - w)/2;
553 }
554
555 max_offs = odev->width * odev->height;
556
557 while (offs < count && odev->buf_offs < max_offs) {
558 int ret = 0;
559
560 if (buf[offs] == '1' || buf[offs] == '#') {
561 ret = append_values(odev, 1, 1);
562 if (ret < 0)
563 return ret;
564 } else if (buf[offs] == '0' || buf[offs] == ' ') {
565 ret = append_values(odev, 0, 1);
566 if (ret < 0)
567 return ret;
568 } else if (buf[offs] == '\n') {
569
570
571
572 if (odev->buf_offs % odev->width != 0)
573 ret = append_values(odev, odev->last_val,
574 odev->width -
575 (odev->buf_offs %
576 odev->width));
577 if (ret < 0)
578 return ret;
579 }
580
581 offs++;
582 }
583
584 if (odev->buf_offs >= max_offs)
585 send_data(odev);
586
587 return count;
588
589error_width:
590 dev_err(odev->dev, "Wrong picture width specified.\n");
591 return -EIO;
592
593error_height:
594 dev_err(odev->dev, "Wrong picture height specified.\n");
595 return -EIO;
596
597error_header:
598 dev_err(odev->dev, "Wrong picture header.\n");
599 return -EIO;
600}
601
602static ssize_t set_picture(struct device *dev, struct device_attribute *attr,
603 const char *buf, size_t count)
604{
605 struct usb_interface *intf = to_usb_interface(dev);
606
607 return odev_set_picture(usb_get_intfdata(intf), buf, count);
608}
609
610static ssize_t class_set_picture(struct device *device,
611 struct device_attribute *attr,
612 const char *buf, size_t count)
613{
614 return odev_set_picture((struct asus_oled_dev *)
615 dev_get_drvdata(device), buf, count);
616}
617
618#define ASUS_OLED_DEVICE_ATTR(_file) dev_attr_asus_oled_##_file
619
620static DEVICE_ATTR(asus_oled_enabled, S_IWUSR | S_IRUGO,
621 get_enabled, set_enabled);
622static DEVICE_ATTR(asus_oled_picture, S_IWUSR , NULL, set_picture);
623
624static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO,
625 class_get_enabled, class_set_enabled);
626static DEVICE_ATTR(picture, S_IWUSR, NULL, class_set_picture);
627
628static int asus_oled_probe(struct usb_interface *interface,
629 const struct usb_device_id *id)
630{
631 struct usb_device *udev = interface_to_usbdev(interface);
632 struct asus_oled_dev *odev = NULL;
633 int retval = -ENOMEM;
634 uint16_t dev_width = 0;
635 enum oled_pack_mode pack_mode = PACK_MODE_LAST;
636 const struct oled_dev_desc_str *dev_desc = oled_dev_desc_table;
637 const char *desc = NULL;
638
639 if (!id) {
640
641 dev_err(&interface->dev, "No usb_device_id provided!\n");
642 return -ENODEV;
643 }
644
645 for (; dev_desc->idVendor; dev_desc++) {
646 if (dev_desc->idVendor == id->idVendor
647 && dev_desc->idProduct == id->idProduct) {
648 dev_width = dev_desc->devWidth;
649 desc = dev_desc->devDesc;
650 pack_mode = dev_desc->packMode;
651 break;
652 }
653 }
654
655 if (!desc || dev_width < 1 || pack_mode == PACK_MODE_LAST) {
656 dev_err(&interface->dev,
657 "Missing or incomplete device description!\n");
658 return -ENODEV;
659 }
660
661 odev = kzalloc(sizeof(struct asus_oled_dev), GFP_KERNEL);
662 if (odev == NULL)
663 return -ENOMEM;
664
665 odev->udev = usb_get_dev(udev);
666 odev->pic_mode = ASUS_OLED_STATIC;
667 odev->dev_width = dev_width;
668 odev->pack_mode = pack_mode;
669 odev->height = 0;
670 odev->width = 0;
671 odev->x_shift = 0;
672 odev->y_shift = 0;
673 odev->buf_offs = 0;
674 odev->buf_size = 0;
675 odev->last_val = 0;
676 odev->buf = NULL;
677 odev->enabled = 1;
678 odev->dev = NULL;
679
680 usb_set_intfdata(interface, odev);
681
682 retval = device_create_file(&interface->dev,
683 &ASUS_OLED_DEVICE_ATTR(enabled));
684 if (retval)
685 goto err_files;
686
687 retval = device_create_file(&interface->dev,
688 &ASUS_OLED_DEVICE_ATTR(picture));
689 if (retval)
690 goto err_files;
691
692 odev->dev = device_create(oled_class, &interface->dev, MKDEV(0, 0),
693 NULL, "oled_%d", ++oled_num);
694
695 if (IS_ERR(odev->dev)) {
696 retval = PTR_ERR(odev->dev);
697 goto err_files;
698 }
699
700 dev_set_drvdata(odev->dev, odev);
701
702 retval = device_create_file(odev->dev, &dev_attr_enabled);
703 if (retval)
704 goto err_class_enabled;
705
706 retval = device_create_file(odev->dev, &dev_attr_picture);
707 if (retval)
708 goto err_class_picture;
709
710 dev_info(&interface->dev,
711 "Attached Asus OLED device: %s [width %u, pack_mode %d]\n",
712 desc, odev->dev_width, odev->pack_mode);
713
714 if (start_off)
715 enable_oled(odev, 0);
716
717 return 0;
718
719err_class_picture:
720 device_remove_file(odev->dev, &dev_attr_picture);
721
722err_class_enabled:
723 device_remove_file(odev->dev, &dev_attr_enabled);
724 device_unregister(odev->dev);
725
726err_files:
727 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
728 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
729
730 usb_set_intfdata(interface, NULL);
731 usb_put_dev(odev->udev);
732 kfree(odev);
733
734 return retval;
735}
736
737static void asus_oled_disconnect(struct usb_interface *interface)
738{
739 struct asus_oled_dev *odev;
740
741 odev = usb_get_intfdata(interface);
742 usb_set_intfdata(interface, NULL);
743
744 device_remove_file(odev->dev, &dev_attr_picture);
745 device_remove_file(odev->dev, &dev_attr_enabled);
746 device_unregister(odev->dev);
747
748 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
749 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
750
751 usb_put_dev(odev->udev);
752
753 kfree(odev->buf);
754
755 kfree(odev);
756
757 dev_info(&interface->dev, "Disconnected Asus OLED device\n");
758}
759
760#ifdef CONFIG_PM
761static int asus_oled_suspend(struct usb_interface *intf, pm_message_t message)
762{
763 struct asus_oled_dev *odev;
764
765 odev = usb_get_intfdata(intf);
766 if (!odev)
767 return -ENODEV;
768
769 odev->enabled_post_resume = odev->enabled;
770 enable_oled(odev, 0);
771
772 return 0;
773}
774
775static int asus_oled_resume(struct usb_interface *intf)
776{
777 struct asus_oled_dev *odev;
778
779 odev = usb_get_intfdata(intf);
780 if (!odev)
781 return -ENODEV;
782
783 enable_oled(odev, odev->enabled_post_resume);
784
785 return 0;
786}
787#else
788#define asus_oled_suspend NULL
789#define asus_oled_resume NULL
790#endif
791
792static struct usb_driver oled_driver = {
793 .name = ASUS_OLED_NAME,
794 .probe = asus_oled_probe,
795 .disconnect = asus_oled_disconnect,
796 .id_table = id_table,
797 .suspend = asus_oled_suspend,
798 .resume = asus_oled_resume,
799};
800
801static CLASS_ATTR_STRING(version, S_IRUGO,
802 ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
803
804static int __init asus_oled_init(void)
805{
806 int retval = 0;
807 oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
808
809 if (IS_ERR(oled_class)) {
810 pr_err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class\n");
811 return PTR_ERR(oled_class);
812 }
813
814 retval = class_create_file(oled_class, &class_attr_version.attr);
815 if (retval) {
816 pr_err("Error creating class version file\n");
817 goto error;
818 }
819
820 retval = usb_register(&oled_driver);
821
822 if (retval) {
823 pr_err("usb_register failed. Error number %d\n", retval);
824 goto error;
825 }
826
827 return retval;
828
829error:
830 class_destroy(oled_class);
831 return retval;
832}
833
834static void __exit asus_oled_exit(void)
835{
836 usb_deregister(&oled_driver);
837 class_remove_file(oled_class, &class_attr_version.attr);
838 class_destroy(oled_class);
839}
840
841module_init(asus_oled_init);
842module_exit(asus_oled_exit);
843
844
