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Merge tag 'irqdomain-for-linus' of git://git.secretlab.ca/git/linux
[linux-2.6.git] / drivers / staging / asus_oled / asus_oled.c
blob3654dc32a0c6ca4d98262809ce64653688ee43da
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_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
57 MODULE_AUTHOR("Jakub Schmidtke, sjakub@gmail.com");
58 MODULE_DESCRIPTION("Asus OLED Driver");
59 MODULE_LICENSE("GPL");
60 MODULE_VERSION(ASUS_OLED_VERSION);
61
62 static struct class *oled_class;
63 static int oled_num;
64
65 static uint start_off;
66
67 module_param(start_off, uint, 0644);
68
69 MODULE_PARM_DESC(start_off,
70 "Set to 1 to switch off OLED display after it is attached");
71
72 enum oled_pack_mode {
73 PACK_MODE_G1,
74 PACK_MODE_G50,
75 PACK_MODE_LAST
76 };
77
78 struct oled_dev_desc_str {
79 uint16_t idVendor;
80 uint16_t idProduct;
81 /* width of display */
82 uint16_t devWidth;
83 /* formula to be used while packing the picture */
84 enum oled_pack_mode packMode;
85 const char *devDesc;
86 };
87
88 /* table of devices that work with this driver */
89 static const struct usb_device_id id_table[] = {
90 /* Asus G1/G2 (and variants)*/
91 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM) },
92 /* Asus G50V (and possibly others - G70? G71?)*/
93 { USB_DEVICE(USB_VENDOR_ID_ASUS, USB_DEVICE_ID_ASUS_LCM2) },
94 { },
95 };
96
97 /* parameters of specific devices */
98 static 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
106 MODULE_DEVICE_TABLE(usb, id_table);
107
108 struct 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
121 struct asus_oled_packet {
122 struct asus_oled_header header;
123 uint8_t bitmap[ASUS_OLED_PACKET_BUF_SIZE];
124 } __attribute((packed));
125
126 struct 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
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
160 static 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
192 static 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
206 static 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
222 static 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
231 static 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
240 static 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
277 static 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
300 static 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
317 static 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 * When sending roll-mode data the display updated only
329 * first packet. I have no idea why, but when static picture
330 * is sent just before rolling picture everything works fine.
331 */
332 if (odev->pic_mode == ASUS_OLED_ROLL)
333 send_packets(odev->udev, packet, odev->buf,
334 ASUS_OLED_STATIC, 2);
335
336 /* Only ROLL mode can use more than 2 packets.*/
337 if (odev->pic_mode != ASUS_OLED_ROLL && packet_num > 2)
338 packet_num = 2;
339
340 send_packets(odev->udev, packet, odev->buf,
341 odev->pic_mode, packet_num);
342 } else if (odev->pack_mode == PACK_MODE_G50) {
343 send_packets_g50(odev->udev, packet, odev->buf);
344 }
345
346 kfree(packet);
347 }
348
349 static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
350 {
351 odev->last_val = val;
352
353 if (val == 0) {
354 odev->buf_offs += count;
355 return 0;
356 }
357
358 while (count-- > 0) {
359 size_t x = odev->buf_offs % odev->width;
360 size_t y = odev->buf_offs / odev->width;
361 size_t i;
362
363 x += odev->x_shift;
364 y += odev->y_shift;
365
366 switch (odev->pack_mode) {
367 case PACK_MODE_G1:
368 /*
369 * i = (x/128)*640 + 127 - x + (y/8)*128;
370 * This one for 128 is the same, but might be better
371 * for different widths?
372 */
373 i = (x/odev->dev_width)*640 +
374 odev->dev_width - 1 - x +
375 (y/8)*odev->dev_width;
376 break;
377
378 case PACK_MODE_G50:
379 i = (odev->dev_width - 1 - x)/8 + y*odev->dev_width/8;
380 break;
381
382 default:
383 i = 0;
384 dev_err(odev->dev, "Unknown OLED Pack Mode: %d!\n",
385 odev->pack_mode);
386 break;
387 }
388
389 if (i >= odev->buf_size) {
390 dev_err(odev->dev, "Buffer overflow! Report a bug: offs: %zu >= %zu i: %zu (x: %zu y: %zu)\n",
391 odev->buf_offs, odev->buf_size, i, x, y);
392 return -EIO;
393 }
394
395 switch (odev->pack_mode) {
396 case PACK_MODE_G1:
397 odev->buf[i] &= ~(1<<(y%8));
398 break;
399
400 case PACK_MODE_G50:
401 odev->buf[i] &= ~(1<<(x%8));
402 break;
403
404 default:
405 /* cannot get here; stops gcc complaining*/
406 break;
407 }
408
409 odev->buf_offs++;
410 }
411
412 return 0;
413 }
414
415 static ssize_t odev_set_picture(struct asus_oled_dev *odev,
416 const char *buf, size_t count)
417 {
418 size_t offs = 0, max_offs;
419
420 if (count < 1)
421 return 0;
422
423 if (tolower(buf[0]) == 'b') {
424 /* binary mode, set the entire memory*/
425
426 size_t i;
427
428 odev->buf_size = (odev->dev_width * ASUS_OLED_DISP_HEIGHT) / 8;
429
430 kfree(odev->buf);
431 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
432 if (odev->buf == NULL) {
433 odev->buf_size = 0;
434 dev_err(odev->dev, "Out of memory!\n");
435 return -ENOMEM;
436 }
437
438 memset(odev->buf, 0xff, odev->buf_size);
439
440 for (i = 1; i < count && i <= 32 * 32; i++) {
441 odev->buf[i-1] = buf[i];
442 odev->buf_offs = i-1;
443 }
444
445 odev->width = odev->dev_width / 8;
446 odev->height = ASUS_OLED_DISP_HEIGHT;
447 odev->x_shift = 0;
448 odev->y_shift = 0;
449 odev->last_val = 0;
450
451 send_data(odev);
452
453 return count;
454 }
455
456 if (buf[0] == '<') {
457 size_t i;
458 size_t w = 0, h = 0;
459 size_t w_mem, h_mem;
460
461 if (count < 10 || buf[2] != ':')
462 goto error_header;
463
464
465 switch (tolower(buf[1])) {
466 case ASUS_OLED_STATIC:
467 case ASUS_OLED_ROLL:
468 case ASUS_OLED_FLASH:
469 odev->pic_mode = buf[1];
470 break;
471 default:
472 dev_err(odev->dev, "Wrong picture mode: '%c'.\n",
473 buf[1]);
474 return -EIO;
475 break;
476 }
477
478 for (i = 3; i < count; ++i) {
479 if (buf[i] >= '0' && buf[i] <= '9') {
480 w = 10*w + (buf[i] - '0');
481
482 if (w > ASUS_OLED_MAX_WIDTH)
483 goto error_width;
484 } else if (tolower(buf[i]) == 'x') {
485 break;
486 } else {
487 goto error_width;
488 }
489 }
490
491 for (++i; i < count; ++i) {
492 if (buf[i] >= '0' && buf[i] <= '9') {
493 h = 10*h + (buf[i] - '0');
494
495 if (h > ASUS_OLED_DISP_HEIGHT)
496 goto error_height;
497 } else if (tolower(buf[i]) == '>') {
498 break;
499 } else {
500 goto error_height;
501 }
502 }
503
504 if (w < 1 || w > ASUS_OLED_MAX_WIDTH)
505 goto error_width;
506
507 if (h < 1 || h > ASUS_OLED_DISP_HEIGHT)
508 goto error_height;
509
510 if (i >= count || buf[i] != '>')
511 goto error_header;
512
513 offs = i+1;
514
515 if (w % (odev->dev_width) != 0)
516 w_mem = (w/(odev->dev_width) + 1)*(odev->dev_width);
517 else
518 w_mem = w;
519
520 if (h < ASUS_OLED_DISP_HEIGHT)
521 h_mem = ASUS_OLED_DISP_HEIGHT;
522 else
523 h_mem = h;
524
525 odev->buf_size = w_mem * h_mem / 8;
526
527 kfree(odev->buf);
528 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
529
530 if (odev->buf == NULL) {
531 odev->buf_size = 0;
532 dev_err(odev->dev, "Out of memory!\n");
533 return -ENOMEM;
534 }
535
536 memset(odev->buf, 0xff, odev->buf_size);
537
538 odev->buf_offs = 0;
539 odev->width = w;
540 odev->height = h;
541 odev->x_shift = 0;
542 odev->y_shift = 0;
543 odev->last_val = 0;
544
545 if (odev->pic_mode == ASUS_OLED_FLASH) {
546 if (h < ASUS_OLED_DISP_HEIGHT/2)
547 odev->y_shift = (ASUS_OLED_DISP_HEIGHT/2 - h)/2;
548 } else {
549 if (h < ASUS_OLED_DISP_HEIGHT)
550 odev->y_shift = (ASUS_OLED_DISP_HEIGHT - h)/2;
551 }
552
553 if (w < (odev->dev_width))
554 odev->x_shift = ((odev->dev_width) - w)/2;
555 }
556
557 max_offs = odev->width * odev->height;
558
559 while (offs < count && odev->buf_offs < max_offs) {
560 int ret = 0;
561
562 if (buf[offs] == '1' || buf[offs] == '#') {
563 ret = append_values(odev, 1, 1);
564 if (ret < 0)
565 return ret;
566 } else if (buf[offs] == '0' || buf[offs] == ' ') {
567 ret = append_values(odev, 0, 1);
568 if (ret < 0)
569 return ret;
570 } else if (buf[offs] == '\n') {
571 /*
572 * New line detected. Lets assume, that all characters
573 * till the end of the line were equal to the last
574 * character in this line.
575 */
576 if (odev->buf_offs % odev->width != 0)
577 ret = append_values(odev, odev->last_val,
578 odev->width -
579 (odev->buf_offs %
580 odev->width));
581 if (ret < 0)
582 return ret;
583 }
584
585 offs++;
586 }
587
588 if (odev->buf_offs >= max_offs)
589 send_data(odev);
590
591 return count;
592
593 error_width:
594 dev_err(odev->dev, "Wrong picture width specified.\n");
595 return -EIO;
596
597 error_height:
598 dev_err(odev->dev, "Wrong picture height specified.\n");
599 return -EIO;
600
601 error_header:
602 dev_err(odev->dev, "Wrong picture header.\n");
603 return -EIO;
604 }
605
606 static ssize_t set_picture(struct device *dev, struct device_attribute *attr,
607 const char *buf, size_t count)
608 {
609 struct usb_interface *intf = to_usb_interface(dev);
610
611 return odev_set_picture(usb_get_intfdata(intf), buf, count);
612 }
613
614 static ssize_t class_set_picture(struct device *device,
615 struct device_attribute *attr,
616 const char *buf, size_t count)
617 {
618 return odev_set_picture((struct asus_oled_dev *)
619 dev_get_drvdata(device), buf, count);
620 }
621
622 #define ASUS_OLED_DEVICE_ATTR(_file) dev_attr_asus_oled_##_file
623
624 static DEVICE_ATTR(asus_oled_enabled, S_IWUSR | S_IRUGO,
625 get_enabled, set_enabled);
626 static DEVICE_ATTR(asus_oled_picture, S_IWUSR , NULL, set_picture);
627
628 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO,
629 class_get_enabled, class_set_enabled);
630 static DEVICE_ATTR(picture, S_IWUSR, NULL, class_set_picture);
631
632 static int asus_oled_probe(struct usb_interface *interface,
633 const struct usb_device_id *id)
634 {
635 struct usb_device *udev = interface_to_usbdev(interface);
636 struct asus_oled_dev *odev = NULL;
637 int retval = -ENOMEM;
638 uint16_t dev_width = 0;
639 enum oled_pack_mode pack_mode = PACK_MODE_LAST;
640 const struct oled_dev_desc_str *dev_desc = oled_dev_desc_table;
641 const char *desc = NULL;
642
643 if (!id) {
644 /* Even possible? Just to make sure...*/
645 dev_err(&interface->dev, "No usb_device_id provided!\n");
646 return -ENODEV;
647 }
648
649 for (; dev_desc->idVendor; dev_desc++) {
650 if (dev_desc->idVendor == id->idVendor
651 && dev_desc->idProduct == id->idProduct) {
652 dev_width = dev_desc->devWidth;
653 desc = dev_desc->devDesc;
654 pack_mode = dev_desc->packMode;
655 break;
656 }
657 }
658
659 if (!desc || dev_width < 1 || pack_mode == PACK_MODE_LAST) {
660 dev_err(&interface->dev,
661 "Missing or incomplete device description!\n");
662 return -ENODEV;
663 }
664
665 odev = kzalloc(sizeof(struct asus_oled_dev), GFP_KERNEL);
666 if (odev == NULL)
667 return -ENOMEM;
668
669 odev->udev = usb_get_dev(udev);
670 odev->pic_mode = ASUS_OLED_STATIC;
671 odev->dev_width = dev_width;
672 odev->pack_mode = pack_mode;
673 odev->height = 0;
674 odev->width = 0;
675 odev->x_shift = 0;
676 odev->y_shift = 0;
677 odev->buf_offs = 0;
678 odev->buf_size = 0;
679 odev->last_val = 0;
680 odev->buf = NULL;
681 odev->enabled = 1;
682 odev->dev = NULL;
683
684 usb_set_intfdata(interface, odev);
685
686 retval = device_create_file(&interface->dev,
687 &ASUS_OLED_DEVICE_ATTR(enabled));
688 if (retval)
689 goto err_files;
690
691 retval = device_create_file(&interface->dev,
692 &ASUS_OLED_DEVICE_ATTR(picture));
693 if (retval)
694 goto err_files;
695
696 odev->dev = device_create(oled_class, &interface->dev, MKDEV(0, 0),
697 NULL, "oled_%d", ++oled_num);
698
699 if (IS_ERR(odev->dev)) {
700 retval = PTR_ERR(odev->dev);
701 goto err_files;
702 }
703
704 dev_set_drvdata(odev->dev, odev);
705
706 retval = device_create_file(odev->dev, &dev_attr_enabled);
707 if (retval)
708 goto err_class_enabled;
709
710 retval = device_create_file(odev->dev, &dev_attr_picture);
711 if (retval)
712 goto err_class_picture;
713
714 dev_info(&interface->dev,
715 "Attached Asus OLED device: %s [width %u, pack_mode %d]\n",
716 desc, odev->dev_width, odev->pack_mode);
717
718 if (start_off)
719 enable_oled(odev, 0);
720
721 return 0;
722
723 err_class_picture:
724 device_remove_file(odev->dev, &dev_attr_picture);
725
726 err_class_enabled:
727 device_remove_file(odev->dev, &dev_attr_enabled);
728 device_unregister(odev->dev);
729
730 err_files:
731 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
732 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
733
734 usb_set_intfdata(interface, NULL);
735 usb_put_dev(odev->udev);
736 kfree(odev);
737
738 return retval;
739 }
740
741 static void asus_oled_disconnect(struct usb_interface *interface)
742 {
743 struct asus_oled_dev *odev;
744
745 odev = usb_get_intfdata(interface);
746 usb_set_intfdata(interface, NULL);
747
748 device_remove_file(odev->dev, &dev_attr_picture);
749 device_remove_file(odev->dev, &dev_attr_enabled);
750 device_unregister(odev->dev);
751
752 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
753 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
754
755 usb_put_dev(odev->udev);
756
757 kfree(odev->buf);
758
759 kfree(odev);
760
761 dev_info(&interface->dev, "Disconnected Asus OLED device\n");
762 }
763
764 #ifdef CONFIG_PM
765 static int asus_oled_suspend(struct usb_interface *intf, pm_message_t message)
766 {
767 struct asus_oled_dev *odev;
768
769 odev = usb_get_intfdata(intf);
770 if (!odev)
771 return -ENODEV;
772
773 odev->enabled_post_resume = odev->enabled;
774 enable_oled(odev, 0);
775
776 return 0;
777 }
778
779 static int asus_oled_resume(struct usb_interface *intf)
780 {
781 struct asus_oled_dev *odev;
782
783 odev = usb_get_intfdata(intf);
784 if (!odev)
785 return -ENODEV;
786
787 enable_oled(odev, odev->enabled_post_resume);
788
789 return 0;
790 }
791 #else
792 #define asus_oled_suspend NULL
793 #define asus_oled_resume NULL
794 #endif
795
796 static struct usb_driver oled_driver = {
797 .name = ASUS_OLED_NAME,
798 .probe = asus_oled_probe,
799 .disconnect = asus_oled_disconnect,
800 .id_table = id_table,
801 .suspend = asus_oled_suspend,
802 .resume = asus_oled_resume,
803 };
804
805 static CLASS_ATTR_STRING(version, S_IRUGO,
806 ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
807
808 static int __init asus_oled_init(void)
809 {
810 int retval = 0;
811 oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
812
813 if (IS_ERR(oled_class)) {
814 pr_err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class\n");
815 return PTR_ERR(oled_class);
816 }
817
818 retval = class_create_file(oled_class, &class_attr_version.attr);
819 if (retval) {
820 pr_err("Error creating class version file\n");
821 goto error;
822 }
823
824 retval = usb_register(&oled_driver);
825
826 if (retval) {
827 pr_err("usb_register failed. Error number %d\n", retval);
828 goto error;
829 }
830
831 return retval;
832
833 error:
834 class_destroy(oled_class);
835 return retval;
836 }
837
838 static void __exit asus_oled_exit(void)
839 {
840 usb_deregister(&oled_driver);
841 class_remove_file(oled_class, &class_attr_version.attr);
842 class_destroy(oled_class);
843 }
844
845 module_init(asus_oled_init);
846 module_exit(asus_oled_exit);
847
Linus' kernel tree