1 /*
2 * Asus OLED USB driver
3 *
4 * Copyright (C) 2007,2008 Jakub Schmidtke (sjakub@gmail.com)
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 *
22 *
23 * This module is based on usbled and asus-laptop modules.
24 *
25 *
26 * Asus OLED support is based on asusoled program taken from
27 * <http://lapsus.berlios.de/asus_oled.html>.
28 *
29 *
30 */
31
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_ERROR "Asus OLED Display Error: "
46
47 #define ASUS_OLED_STATIC 's'
48 #define ASUS_OLED_ROLL 'r'
49 #define ASUS_OLED_FLASH 'f'
50
51 #define ASUS_OLED_MAX_WIDTH 1792
52 #define ASUS_OLED_DISP_HEIGHT 32
53 #define ASUS_OLED_PACKET_BUF_SIZE 256
54
55 #define USB_VENDOR_ID_ASUS 0x0b05
56 #define USB_DEVICE_ID_ASUS_LCM 0x1726
57 #define USB_DEVICE_ID_ASUS_LCM2 0x175b
58
59 MODULE_AUTHOR("Jakub Schmidtke, sjakub@gmail.com");
60 MODULE_DESCRIPTION("Asus OLED Driver v" ASUS_OLED_VERSION);
61 MODULE_LICENSE("GPL");
62
63 static struct class *oled_class;
64 static int oled_num;
65
66 static uint start_off;
67
68 module_param(start_off, uint, 0644);
69
70 MODULE_PARM_DESC(start_off,
71 "Set to 1 to switch off OLED display after it is attached");
72
73 enum oled_pack_mode {
74 PACK_MODE_G1,
75 PACK_MODE_G50,
76 PACK_MODE_LAST
77 };
78
79 struct oled_dev_desc_str {
80 uint16_t idVendor;
81 uint16_t idProduct;
82 /* width of display */
83 uint16_t devWidth;
84 /* formula to be used while packing the picture */
85 enum oled_pack_mode packMode;
86 const char *devDesc;
87 };
88
89 /* table of devices that work with this driver */
90 static const struct usb_device_id id_table[] = {
91 /* Asus G1/G2 (and variants)*/
92 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM) },
93 /* Asus G50V (and possibly others - G70? G71?)*/
94 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2) },
95 { },
96 };
97
98 /* parameters of specific devices */
99 static struct oled_dev_desc_str oled_dev_desc_table[] = {
100 { USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM, 128, PACK_MODE_G1,
101 "G1/G2" },
102 { USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2, 256, PACK_MODE_G50,
103 "G50" },
104 { },
105 };
106
107 MODULE_DEVICE_TABLE(usb, id_table);
108
109 struct asus_oled_header {
110 uint8_t magic1;
111 uint8_t magic2;
112 uint8_t flags;
113 uint8_t value3;
114 uint8_t buffer1;
115 uint8_t buffer2;
116 uint8_t value6;
117 uint8_t value7;
118 uint8_t value8;
119 uint8_t padding2[7];
120 } __attribute((packed));
121
122 struct asus_oled_packet {
123 struct asus_oled_header header;
124 uint8_t bitmap[ASUS_OLED_PACKET_BUF_SIZE];
125 } __attribute((packed));
126
127 struct asus_oled_dev {
128 struct usb_device *udev;
129 uint8_t pic_mode;
130 uint16_t dev_width;
131 enum oled_pack_mode pack_mode;
132 size_t height;
133 size_t width;
134 size_t x_shift;
135 size_t y_shift;
136 size_t buf_offs;
137 uint8_t last_val;
138 size_t buf_size;
139 char *buf;
140 uint8_t enabled;
141 struct device *dev;
142 };
143
setup_packet_header(struct asus_oled_packet * packet,char flags,char value3,char buffer1,char buffer2,char value6,char value7,char value8)144 static 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
enable_oled(struct asus_oled_dev * odev,uint8_t enabl)160 static void enable_oled(struct asus_oled_dev *odev, uint8_t enabl)
161 {
162 int a;
163 int retval;
164 int act_len;
165 struct asus_oled_packet *packet;
166
167 packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
168
169 if (!packet) {
170 dev_err(&odev->udev->dev, "out of memory\n");
171 return;
172 }
173
174 setup_packet_header(packet, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00);
175
176 if (enabl)
177 packet->bitmap[0] = 0xaf;
178 else
179 packet->bitmap[0] = 0xae;
180
181 for (a = 0; a < 1; a++) {
182 retval = usb_bulk_msg(odev->udev,
183 usb_sndbulkpipe(odev->udev, 2),
184 packet,
185 sizeof(struct asus_oled_header) + 1,
186 &act_len,
187 -1);
188
189 if (retval)
190 dev_dbg(&odev->udev->dev, "retval = %d\n", retval);
191 }
192
193 odev->enabled = enabl;
194
195 kfree(packet);
196 }
197
set_enabled(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)198 static ssize_t set_enabled(struct device *dev, struct device_attribute *attr,
199 const char *buf, size_t count)
200 {
201 struct usb_interface *intf = to_usb_interface(dev);
202 struct asus_oled_dev *odev = usb_get_intfdata(intf);
203 unsigned long value;
204 if (kstrtoul(buf, 10, &value))
205 return -EINVAL;
206
207 enable_oled(odev, value);
208
209 return count;
210 }
211
class_set_enabled(struct device * device,struct device_attribute * attr,const char * buf,size_t count)212 static ssize_t class_set_enabled(struct device *device,
213 struct device_attribute *attr,
214 const char *buf, size_t count)
215 {
216 struct asus_oled_dev *odev =
217 (struct asus_oled_dev *) dev_get_drvdata(device);
218 unsigned long value;
219
220 if (kstrtoul(buf, 10, &value))
221 return -EINVAL;
222
223 enable_oled(odev, value);
224
225 return count;
226 }
227
get_enabled(struct device * dev,struct device_attribute * attr,char * buf)228 static ssize_t get_enabled(struct device *dev, struct device_attribute *attr,
229 char *buf)
230 {
231 struct usb_interface *intf = to_usb_interface(dev);
232 struct asus_oled_dev *odev = usb_get_intfdata(intf);
233
234 return sprintf(buf, "%d\n", odev->enabled);
235 }
236
class_get_enabled(struct device * device,struct device_attribute * attr,char * buf)237 static ssize_t class_get_enabled(struct device *device,
238 struct device_attribute *attr, char *buf)
239 {
240 struct asus_oled_dev *odev =
241 (struct asus_oled_dev *) dev_get_drvdata(device);
242
243 return sprintf(buf, "%d\n", odev->enabled);
244 }
245
send_packets(struct usb_device * udev,struct asus_oled_packet * packet,char * buf,uint8_t p_type,size_t p_num)246 static void send_packets(struct usb_device *udev,
247 struct asus_oled_packet *packet,
248 char *buf, uint8_t p_type, size_t p_num)
249 {
250 size_t i;
251 int act_len;
252
253 for (i = 0; i < p_num; i++) {
254 int retval;
255
256 switch (p_type) {
257 case ASUS_OLED_ROLL:
258 setup_packet_header(packet, 0x40, 0x80, p_num,
259 i + 1, 0x00, 0x01, 0xff);
260 break;
261 case ASUS_OLED_STATIC:
262 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
263 0x01, 0x00, 0x01, 0x00);
264 break;
265 case ASUS_OLED_FLASH:
266 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
267 0x01, 0x00, 0x00, 0xff);
268 break;
269 }
270
271 memcpy(packet->bitmap, buf + (ASUS_OLED_PACKET_BUF_SIZE*i),
272 ASUS_OLED_PACKET_BUF_SIZE);
273
274 retval = usb_bulk_msg(udev, usb_sndctrlpipe(udev, 2),
275 packet, sizeof(struct asus_oled_packet),
276 &act_len, -1);
277
278 if (retval)
279 dev_dbg(&udev->dev, "retval = %d\n", retval);
280 }
281 }
282
send_packet(struct usb_device * udev,struct asus_oled_packet * packet,size_t offset,size_t len,char * buf,uint8_t b1,uint8_t b2,uint8_t b3,uint8_t b4,uint8_t b5,uint8_t b6)283 static void send_packet(struct usb_device *udev,
284 struct asus_oled_packet *packet,
285 size_t offset, size_t len, char *buf, uint8_t b1,
286 uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5,
287 uint8_t b6) {
288 int retval;
289 int act_len;
290
291 setup_packet_header(packet, b1, b2, b3, b4, b5, b6, 0x00);
292 memcpy(packet->bitmap, buf + offset, len);
293
294 retval = usb_bulk_msg(udev,
295 usb_sndctrlpipe(udev, 2),
296 packet,
297 sizeof(struct asus_oled_packet),
298 &act_len,
299 -1);
300
301 if (retval)
302 dev_dbg(&udev->dev, "retval = %d\n", retval);
303 }
304
305
send_packets_g50(struct usb_device * udev,struct asus_oled_packet * packet,char * buf)306 static void send_packets_g50(struct usb_device *udev,
307 struct asus_oled_packet *packet, char *buf)
308 {
309 send_packet(udev, packet, 0, 0x100, buf,
310 0x10, 0x00, 0x02, 0x01, 0x00, 0x01);
311 send_packet(udev, packet, 0x100, 0x080, buf,
312 0x10, 0x00, 0x02, 0x02, 0x80, 0x00);
313
314 send_packet(udev, packet, 0x180, 0x100, buf,
315 0x11, 0x00, 0x03, 0x01, 0x00, 0x01);
316 send_packet(udev, packet, 0x280, 0x100, buf,
317 0x11, 0x00, 0x03, 0x02, 0x00, 0x01);
318 send_packet(udev, packet, 0x380, 0x080, buf,
319 0x11, 0x00, 0x03, 0x03, 0x80, 0x00);
320 }
321
322
send_data(struct asus_oled_dev * odev)323 static void send_data(struct asus_oled_dev *odev)
324 {
325 size_t packet_num = odev->buf_size / ASUS_OLED_PACKET_BUF_SIZE;
326 struct asus_oled_packet *packet;
327
328 packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
329
330 if (!packet) {
331 dev_err(&odev->udev->dev, "out of memory\n");
332 return;
333 }
334
335 if (odev->pack_mode == PACK_MODE_G1) {
336 /* When sending roll-mode data the display updated only
337 first packet. I have no idea why, but when static picture
338 is sent just before rolling picture everything works fine. */
339 if (odev->pic_mode == ASUS_OLED_ROLL)
340 send_packets(odev->udev, packet, odev->buf,
341 ASUS_OLED_STATIC, 2);
342
343 /* Only ROLL mode can use more than 2 packets.*/
344 if (odev->pic_mode != ASUS_OLED_ROLL && packet_num > 2)
345 packet_num = 2;
346
347 send_packets(odev->udev, packet, odev->buf,
348 odev->pic_mode, packet_num);
349 } else if (odev->pack_mode == PACK_MODE_G50) {
350 send_packets_g50(odev->udev, packet, odev->buf);
351 }
352
353 kfree(packet);
354 }
355
append_values(struct asus_oled_dev * odev,uint8_t val,size_t count)356 static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
357 {
358 odev->last_val = val;
359
360 if (val == 0) {
361 odev->buf_offs += count;
362 return 0;
363 }
364
365 while (count-- > 0) {
366 size_t x = odev->buf_offs % odev->width;
367 size_t y = odev->buf_offs / odev->width;
368 size_t i;
369
370 x += odev->x_shift;
371 y += odev->y_shift;
372
373 switch (odev->pack_mode) {
374 case PACK_MODE_G1:
375 /* i = (x/128)*640 + 127 - x + (y/8)*128;
376 This one for 128 is the same, but might be better
377 for different widths? */
378 i = (x/odev->dev_width)*640 +
379 odev->dev_width - 1 - x +
380 (y/8)*odev->dev_width;
381 break;
382
383 case PACK_MODE_G50:
384 i = (odev->dev_width - 1 - x)/8 + y*odev->dev_width/8;
385 break;
386
387 default:
388 i = 0;
389 printk(ASUS_OLED_ERROR "Unknown OLED Pack Mode: %d!\n",
390 odev->pack_mode);
391 break;
392 }
393
394 if (i >= odev->buf_size) {
395 printk(ASUS_OLED_ERROR "Buffer overflow! Report a bug:"
396 "offs: %d >= %d i: %d (x: %d y: %d)\n",
397 (int) odev->buf_offs, (int) odev->buf_size,
398 (int) i, (int) x, (int) y);
399 return -EIO;
400 }
401
402 switch (odev->pack_mode) {
403 case PACK_MODE_G1:
404 odev->buf[i] &= ~(1<<(y%8));
405 break;
406
407 case PACK_MODE_G50:
408 odev->buf[i] &= ~(1<<(x%8));
409 break;
410
411 default:
412 /* cannot get here; stops gcc complaining*/
413 ;
414 }
415
416 odev->buf_offs++;
417 }
418
419 return 0;
420 }
421
odev_set_picture(struct asus_oled_dev * odev,const char * buf,size_t count)422 static ssize_t odev_set_picture(struct asus_oled_dev *odev,
423 const char *buf, size_t count)
424 {
425 size_t offs = 0, max_offs;
426
427 if (count < 1)
428 return 0;
429
430 if (tolower(buf[0]) == 'b') {
431 /* binary mode, set the entire memory*/
432
433 size_t i;
434
435 odev->buf_size = (odev->dev_width * ASUS_OLED_DISP_HEIGHT) / 8;
436
437 kfree(odev->buf);
438 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
439 if (odev->buf == NULL) {
440 odev->buf_size = 0;
441 printk(ASUS_OLED_ERROR "Out of memory!\n");
442 return -ENOMEM;
443 }
444
445 memset(odev->buf, 0xff, odev->buf_size);
446
447 for (i = 1; i < count && i <= 32 * 32; i++) {
448 odev->buf[i-1] = buf[i];
449 odev->buf_offs = i-1;
450 }
451
452 odev->width = odev->dev_width / 8;
453 odev->height = ASUS_OLED_DISP_HEIGHT;
454 odev->x_shift = 0;
455 odev->y_shift = 0;
456 odev->last_val = 0;
457
458 send_data(odev);
459
460 return count;
461 }
462
463 if (buf[0] == '<') {
464 size_t i;
465 size_t w = 0, h = 0;
466 size_t w_mem, h_mem;
467
468 if (count < 10 || buf[2] != ':')
469 goto error_header;
470
471
472 switch (tolower(buf[1])) {
473 case ASUS_OLED_STATIC:
474 case ASUS_OLED_ROLL:
475 case ASUS_OLED_FLASH:
476 odev->pic_mode = buf[1];
477 break;
478 default:
479 printk(ASUS_OLED_ERROR "Wrong picture mode: '%c'.\n",
480 buf[1]);
481 return -EIO;
482 break;
483 }
484
485 for (i = 3; i < count; ++i) {
486 if (buf[i] >= '0' && buf[i] <= '9') {
487 w = 10*w + (buf[i] - '0');
488
489 if (w > ASUS_OLED_MAX_WIDTH)
490 goto error_width;
491 } else if (tolower(buf[i]) == 'x') {
492 break;
493 } else {
494 goto error_width;
495 }
496 }
497
498 for (++i; i < count; ++i) {
499 if (buf[i] >= '0' && buf[i] <= '9') {
500 h = 10*h + (buf[i] - '0');
501
502 if (h > ASUS_OLED_DISP_HEIGHT)
503 goto error_height;
504 } else if (tolower(buf[i]) == '>') {
505 break;
506 } else {
507 goto error_height;
508 }
509 }
510
511 if (w < 1 || w > ASUS_OLED_MAX_WIDTH)
512 goto error_width;
513
514 if (h < 1 || h > ASUS_OLED_DISP_HEIGHT)
515 goto error_height;
516
517 if (i >= count || buf[i] != '>')
518 goto error_header;
519
520 offs = i+1;
521
522 if (w % (odev->dev_width) != 0)
523 w_mem = (w/(odev->dev_width) + 1)*(odev->dev_width);
524 else
525 w_mem = w;
526
527 if (h < ASUS_OLED_DISP_HEIGHT)
528 h_mem = ASUS_OLED_DISP_HEIGHT;
529 else
530 h_mem = h;
531
532 odev->buf_size = w_mem * h_mem / 8;
533
534 kfree(odev->buf);
535 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
536
537 if (odev->buf == NULL) {
538 odev->buf_size = 0;
539 printk(ASUS_OLED_ERROR "Out of memory!\n");
540 return -ENOMEM;
541 }
542
543 memset(odev->buf, 0xff, odev->buf_size);
544
545 odev->buf_offs = 0;
546 odev->width = w;
547 odev->height = h;
548 odev->x_shift = 0;
549 odev->y_shift = 0;
550 odev->last_val = 0;
551
552 if (odev->pic_mode == ASUS_OLED_FLASH) {
553 if (h < ASUS_OLED_DISP_HEIGHT/2)
554 odev->y_shift = (ASUS_OLED_DISP_HEIGHT/2 - h)/2;
555 } else {
556 if (h < ASUS_OLED_DISP_HEIGHT)
557 odev->y_shift = (ASUS_OLED_DISP_HEIGHT - h)/2;
558 }
559
560 if (w < (odev->dev_width))
561 odev->x_shift = ((odev->dev_width) - w)/2;
562 }
563
564 max_offs = odev->width * odev->height;
565
566 while (offs < count && odev->buf_offs < max_offs) {
567 int ret = 0;
568
569 if (buf[offs] == '1' || buf[offs] == '#') {
570 ret = append_values(odev, 1, 1);
571 if (ret < 0)
572 return ret;
573 } else if (buf[offs] == '0' || buf[offs] == ' ') {
574 ret = append_values(odev, 0, 1);
575 if (ret < 0)
576 return ret;
577 } else if (buf[offs] == '\n') {
578 /* New line detected. Lets assume, that all characters
579 till the end of the line were equal to the last
580 character in this line.*/
581 if (odev->buf_offs % odev->width != 0)
582 ret = append_values(odev, odev->last_val,
583 odev->width -
584 (odev->buf_offs %
585 odev->width));
586 if (ret < 0)
587 return ret;
588 }
589
590 offs++;
591 }
592
593 if (odev->buf_offs >= max_offs)
594 send_data(odev);
595
596 return count;
597
598 error_width:
599 printk(ASUS_OLED_ERROR "Wrong picture width specified.\n");
600 return -EIO;
601
602 error_height:
603 printk(ASUS_OLED_ERROR "Wrong picture height specified.\n");
604 return -EIO;
605
606 error_header:
607 printk(ASUS_OLED_ERROR "Wrong picture header.\n");
608 return -EIO;
609 }
610
set_picture(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)611 static ssize_t set_picture(struct device *dev, struct device_attribute *attr,
612 const char *buf, size_t count)
613 {
614 struct usb_interface *intf = to_usb_interface(dev);
615
616 return odev_set_picture(usb_get_intfdata(intf), buf, count);
617 }
618
class_set_picture(struct device * device,struct device_attribute * attr,const char * buf,size_t count)619 static ssize_t class_set_picture(struct device *device,
620 struct device_attribute *attr,
621 const char *buf, size_t count)
622 {
623 return odev_set_picture((struct asus_oled_dev *)
624 dev_get_drvdata(device), buf, count);
625 }
626
627 #define ASUS_OLED_DEVICE_ATTR(_file) dev_attr_asus_oled_##_file
628
629 static DEVICE_ATTR(asus_oled_enabled, S_IWUSR | S_IRUGO,
630 get_enabled, set_enabled);
631 static DEVICE_ATTR(asus_oled_picture, S_IWUSR , NULL, set_picture);
632
633 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO,
634 class_get_enabled, class_set_enabled);
635 static DEVICE_ATTR(picture, S_IWUSR, NULL, class_set_picture);
636
asus_oled_probe(struct usb_interface * interface,const struct usb_device_id * id)637 static int asus_oled_probe(struct usb_interface *interface,
638 const struct usb_device_id *id)
639 {
640 struct usb_device *udev = interface_to_usbdev(interface);
641 struct asus_oled_dev *odev = NULL;
642 int retval = -ENOMEM;
643 uint16_t dev_width = 0;
644 enum oled_pack_mode pack_mode = PACK_MODE_LAST;
645 const struct oled_dev_desc_str *dev_desc = oled_dev_desc_table;
646 const char *desc = NULL;
647
648 if (!id) {
649 /* Even possible? Just to make sure...*/
650 dev_err(&interface->dev, "No usb_device_id provided!\n");
651 return -ENODEV;
652 }
653
654 for (; dev_desc->idVendor; dev_desc++) {
655 if (dev_desc->idVendor == id->idVendor
656 && dev_desc->idProduct == id->idProduct) {
657 dev_width = dev_desc->devWidth;
658 desc = dev_desc->devDesc;
659 pack_mode = dev_desc->packMode;
660 break;
661 }
662 }
663
664 if (!desc || dev_width < 1 || pack_mode == PACK_MODE_LAST) {
665 dev_err(&interface->dev,
666 "Missing or incomplete device description!\n");
667 return -ENODEV;
668 }
669
670 odev = kzalloc(sizeof(struct asus_oled_dev), GFP_KERNEL);
671
672 if (odev == NULL) {
673 dev_err(&interface->dev, "Out of memory\n");
674 return -ENOMEM;
675 }
676
677 odev->udev = usb_get_dev(udev);
678 odev->pic_mode = ASUS_OLED_STATIC;
679 odev->dev_width = dev_width;
680 odev->pack_mode = pack_mode;
681 odev->height = 0;
682 odev->width = 0;
683 odev->x_shift = 0;
684 odev->y_shift = 0;
685 odev->buf_offs = 0;
686 odev->buf_size = 0;
687 odev->last_val = 0;
688 odev->buf = NULL;
689 odev->enabled = 1;
690 odev->dev = NULL;
691
692 usb_set_intfdata(interface, odev);
693
694 retval = device_create_file(&interface->dev,
695 &ASUS_OLED_DEVICE_ATTR(enabled));
696 if (retval)
697 goto err_files;
698
699 retval = device_create_file(&interface->dev,
700 &ASUS_OLED_DEVICE_ATTR(picture));
701 if (retval)
702 goto err_files;
703
704 odev->dev = device_create(oled_class, &interface->dev, MKDEV(0, 0),
705 NULL, "oled_%d", ++oled_num);
706
707 if (IS_ERR(odev->dev)) {
708 retval = PTR_ERR(odev->dev);
709 goto err_files;
710 }
711
712 dev_set_drvdata(odev->dev, odev);
713
714 retval = device_create_file(odev->dev, &dev_attr_enabled);
715 if (retval)
716 goto err_class_enabled;
717
718 retval = device_create_file(odev->dev, &dev_attr_picture);
719 if (retval)
720 goto err_class_picture;
721
722 dev_info(&interface->dev,
723 "Attached Asus OLED device: %s [width %u, pack_mode %d]\n",
724 desc, odev->dev_width, odev->pack_mode);
725
726 if (start_off)
727 enable_oled(odev, 0);
728
729 return 0;
730
731 err_class_picture:
732 device_remove_file(odev->dev, &dev_attr_picture);
733
734 err_class_enabled:
735 device_remove_file(odev->dev, &dev_attr_enabled);
736 device_unregister(odev->dev);
737
738 err_files:
739 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
740 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
741
742 usb_set_intfdata(interface, NULL);
743 usb_put_dev(odev->udev);
744 kfree(odev);
745
746 return retval;
747 }
748
asus_oled_disconnect(struct usb_interface * interface)749 static void asus_oled_disconnect(struct usb_interface *interface)
750 {
751 struct asus_oled_dev *odev;
752
753 odev = usb_get_intfdata(interface);
754 usb_set_intfdata(interface, NULL);
755
756 device_remove_file(odev->dev, &dev_attr_picture);
757 device_remove_file(odev->dev, &dev_attr_enabled);
758 device_unregister(odev->dev);
759
760 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
761 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
762
763 usb_put_dev(odev->udev);
764
765 kfree(odev->buf);
766
767 kfree(odev);
768
769 dev_info(&interface->dev, "Disconnected Asus OLED device\n");
770 }
771
772 static struct usb_driver oled_driver = {
773 .name = ASUS_OLED_NAME,
774 .probe = asus_oled_probe,
775 .disconnect = asus_oled_disconnect,
776 .id_table = id_table,
777 };
778
779 static CLASS_ATTR_STRING(version, S_IRUGO,
780 ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
781
asus_oled_init(void)782 static int __init asus_oled_init(void)
783 {
784 int retval = 0;
785 oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
786
787 if (IS_ERR(oled_class)) {
788 err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class");
789 return PTR_ERR(oled_class);
790 }
791
792 retval = class_create_file(oled_class, &class_attr_version.attr);
793 if (retval) {
794 err("Error creating class version file");
795 goto error;
796 }
797
798 retval = usb_register(&oled_driver);
799
800 if (retval) {
801 err("usb_register failed. Error number %d", retval);
802 goto error;
803 }
804
805 return retval;
806
807 error:
808 class_destroy(oled_class);
809 return retval;
810 }
811
asus_oled_exit(void)812 static void __exit asus_oled_exit(void)
813 {
814 usb_deregister(&oled_driver);
815 class_remove_file(oled_class, &class_attr_version.attr);
816 class_destroy(oled_class);
817 }
818
819 module_init(asus_oled_init);
820 module_exit(asus_oled_exit);
821
822