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TTY: isdn, use open/close_wait from tty_port
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / staging / asus_oled / asus_oled.c
blob83549d9cfefc5d72e19e1f7c1afe31e39f4f82c6
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
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
168 if (!packet) {
169 dev_err(&odev->udev->dev, "out of memory\n");
170 return;
171 }
172
173 setup_packet_header(packet, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00);
174
175 if (enabl)
176 packet->bitmap[0] = 0xaf;
177 else
178 packet->bitmap[0] = 0xae;
179
180 retval = usb_bulk_msg(odev->udev,
181 usb_sndbulkpipe(odev->udev, 2),
182 packet,
183 sizeof(struct asus_oled_header) + 1,
184 &act_len,
185 -1);
186
187 if (retval)
188 dev_dbg(&odev->udev->dev, "retval = %d\n", retval);
189
190 odev->enabled = enabl;
191
192 kfree(packet);
193 }
194
195 static ssize_t set_enabled(struct device *dev, struct device_attribute *attr,
196 const char *buf, size_t count)
197 {
198 struct usb_interface *intf = to_usb_interface(dev);
199 struct asus_oled_dev *odev = usb_get_intfdata(intf);
200 unsigned long value;
201 if (kstrtoul(buf, 10, &value))
202 return -EINVAL;
203
204 enable_oled(odev, value);
205
206 return count;
207 }
208
209 static ssize_t class_set_enabled(struct device *device,
210 struct device_attribute *attr,
211 const char *buf, size_t count)
212 {
213 struct asus_oled_dev *odev =
214 (struct asus_oled_dev *) dev_get_drvdata(device);
215 unsigned long value;
216
217 if (kstrtoul(buf, 10, &value))
218 return -EINVAL;
219
220 enable_oled(odev, value);
221
222 return count;
223 }
224
225 static ssize_t get_enabled(struct device *dev, struct device_attribute *attr,
226 char *buf)
227 {
228 struct usb_interface *intf = to_usb_interface(dev);
229 struct asus_oled_dev *odev = usb_get_intfdata(intf);
230
231 return sprintf(buf, "%d\n", odev->enabled);
232 }
233
234 static ssize_t class_get_enabled(struct device *device,
235 struct device_attribute *attr, char *buf)
236 {
237 struct asus_oled_dev *odev =
238 (struct asus_oled_dev *) dev_get_drvdata(device);
239
240 return sprintf(buf, "%d\n", odev->enabled);
241 }
242
243 static void send_packets(struct usb_device *udev,
244 struct asus_oled_packet *packet,
245 char *buf, uint8_t p_type, size_t p_num)
246 {
247 size_t i;
248 int act_len;
249
250 for (i = 0; i < p_num; i++) {
251 int retval;
252
253 switch (p_type) {
254 case ASUS_OLED_ROLL:
255 setup_packet_header(packet, 0x40, 0x80, p_num,
256 i + 1, 0x00, 0x01, 0xff);
257 break;
258 case ASUS_OLED_STATIC:
259 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
260 0x01, 0x00, 0x01, 0x00);
261 break;
262 case ASUS_OLED_FLASH:
263 setup_packet_header(packet, 0x10 + i, 0x80, 0x01,
264 0x01, 0x00, 0x00, 0xff);
265 break;
266 }
267
268 memcpy(packet->bitmap, buf + (ASUS_OLED_PACKET_BUF_SIZE*i),
269 ASUS_OLED_PACKET_BUF_SIZE);
270
271 retval = usb_bulk_msg(udev, usb_sndctrlpipe(udev, 2),
272 packet, sizeof(struct asus_oled_packet),
273 &act_len, -1);
274
275 if (retval)
276 dev_dbg(&udev->dev, "retval = %d\n", retval);
277 }
278 }
279
280 static void send_packet(struct usb_device *udev,
281 struct asus_oled_packet *packet,
282 size_t offset, size_t len, char *buf, uint8_t b1,
283 uint8_t b2, uint8_t b3, uint8_t b4, uint8_t b5,
284 uint8_t b6) {
285 int retval;
286 int act_len;
287
288 setup_packet_header(packet, b1, b2, b3, b4, b5, b6, 0x00);
289 memcpy(packet->bitmap, buf + offset, len);
290
291 retval = usb_bulk_msg(udev,
292 usb_sndctrlpipe(udev, 2),
293 packet,
294 sizeof(struct asus_oled_packet),
295 &act_len,
296 -1);
297
298 if (retval)
299 dev_dbg(&udev->dev, "retval = %d\n", retval);
300 }
301
302
303 static void send_packets_g50(struct usb_device *udev,
304 struct asus_oled_packet *packet, char *buf)
305 {
306 send_packet(udev, packet, 0, 0x100, buf,
307 0x10, 0x00, 0x02, 0x01, 0x00, 0x01);
308 send_packet(udev, packet, 0x100, 0x080, buf,
309 0x10, 0x00, 0x02, 0x02, 0x80, 0x00);
310
311 send_packet(udev, packet, 0x180, 0x100, buf,
312 0x11, 0x00, 0x03, 0x01, 0x00, 0x01);
313 send_packet(udev, packet, 0x280, 0x100, buf,
314 0x11, 0x00, 0x03, 0x02, 0x00, 0x01);
315 send_packet(udev, packet, 0x380, 0x080, buf,
316 0x11, 0x00, 0x03, 0x03, 0x80, 0x00);
317 }
318
319
320 static void send_data(struct asus_oled_dev *odev)
321 {
322 size_t packet_num = odev->buf_size / ASUS_OLED_PACKET_BUF_SIZE;
323 struct asus_oled_packet *packet;
324
325 packet = kzalloc(sizeof(struct asus_oled_packet), GFP_KERNEL);
326
327 if (!packet) {
328 dev_err(&odev->udev->dev, "out of memory\n");
329 return;
330 }
331
332 if (odev->pack_mode == PACK_MODE_G1) {
333 /* When sending roll-mode data the display updated only
334 first packet. I have no idea why, but when static picture
335 is sent just before rolling picture everything works fine. */
336 if (odev->pic_mode == ASUS_OLED_ROLL)
337 send_packets(odev->udev, packet, odev->buf,
338 ASUS_OLED_STATIC, 2);
339
340 /* Only ROLL mode can use more than 2 packets.*/
341 if (odev->pic_mode != ASUS_OLED_ROLL && packet_num > 2)
342 packet_num = 2;
343
344 send_packets(odev->udev, packet, odev->buf,
345 odev->pic_mode, packet_num);
346 } else if (odev->pack_mode == PACK_MODE_G50) {
347 send_packets_g50(odev->udev, packet, odev->buf);
348 }
349
350 kfree(packet);
351 }
352
353 static int append_values(struct asus_oled_dev *odev, uint8_t val, size_t count)
354 {
355 odev->last_val = val;
356
357 if (val == 0) {
358 odev->buf_offs += count;
359 return 0;
360 }
361
362 while (count-- > 0) {
363 size_t x = odev->buf_offs % odev->width;
364 size_t y = odev->buf_offs / odev->width;
365 size_t i;
366
367 x += odev->x_shift;
368 y += odev->y_shift;
369
370 switch (odev->pack_mode) {
371 case PACK_MODE_G1:
372 /* i = (x/128)*640 + 127 - x + (y/8)*128;
373 This one for 128 is the same, but might be better
374 for different widths? */
375 i = (x/odev->dev_width)*640 +
376 odev->dev_width - 1 - x +
377 (y/8)*odev->dev_width;
378 break;
379
380 case PACK_MODE_G50:
381 i = (odev->dev_width - 1 - x)/8 + y*odev->dev_width/8;
382 break;
383
384 default:
385 i = 0;
386 printk(ASUS_OLED_ERROR "Unknown OLED Pack Mode: %d!\n",
387 odev->pack_mode);
388 break;
389 }
390
391 if (i >= odev->buf_size) {
392 printk(ASUS_OLED_ERROR "Buffer overflow! Report a bug:"
393 "offs: %d >= %d i: %d (x: %d y: %d)\n",
394 (int) odev->buf_offs, (int) odev->buf_size,
395 (int) i, (int) x, (int) y);
396 return -EIO;
397 }
398
399 switch (odev->pack_mode) {
400 case PACK_MODE_G1:
401 odev->buf[i] &= ~(1<<(y%8));
402 break;
403
404 case PACK_MODE_G50:
405 odev->buf[i] &= ~(1<<(x%8));
406 break;
407
408 default:
409 /* cannot get here; stops gcc complaining*/
410 ;
411 }
412
413 odev->buf_offs++;
414 }
415
416 return 0;
417 }
418
419 static ssize_t odev_set_picture(struct asus_oled_dev *odev,
420 const char *buf, size_t count)
421 {
422 size_t offs = 0, max_offs;
423
424 if (count < 1)
425 return 0;
426
427 if (tolower(buf[0]) == 'b') {
428 /* binary mode, set the entire memory*/
429
430 size_t i;
431
432 odev->buf_size = (odev->dev_width * ASUS_OLED_DISP_HEIGHT) / 8;
433
434 kfree(odev->buf);
435 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
436 if (odev->buf == NULL) {
437 odev->buf_size = 0;
438 printk(ASUS_OLED_ERROR "Out of memory!\n");
439 return -ENOMEM;
440 }
441
442 memset(odev->buf, 0xff, odev->buf_size);
443
444 for (i = 1; i < count && i <= 32 * 32; i++) {
445 odev->buf[i-1] = buf[i];
446 odev->buf_offs = i-1;
447 }
448
449 odev->width = odev->dev_width / 8;
450 odev->height = ASUS_OLED_DISP_HEIGHT;
451 odev->x_shift = 0;
452 odev->y_shift = 0;
453 odev->last_val = 0;
454
455 send_data(odev);
456
457 return count;
458 }
459
460 if (buf[0] == '<') {
461 size_t i;
462 size_t w = 0, h = 0;
463 size_t w_mem, h_mem;
464
465 if (count < 10 || buf[2] != ':')
466 goto error_header;
467
468
469 switch (tolower(buf[1])) {
470 case ASUS_OLED_STATIC:
471 case ASUS_OLED_ROLL:
472 case ASUS_OLED_FLASH:
473 odev->pic_mode = buf[1];
474 break;
475 default:
476 printk(ASUS_OLED_ERROR "Wrong picture mode: '%c'.\n",
477 buf[1]);
478 return -EIO;
479 break;
480 }
481
482 for (i = 3; i < count; ++i) {
483 if (buf[i] >= '0' && buf[i] <= '9') {
484 w = 10*w + (buf[i] - '0');
485
486 if (w > ASUS_OLED_MAX_WIDTH)
487 goto error_width;
488 } else if (tolower(buf[i]) == 'x') {
489 break;
490 } else {
491 goto error_width;
492 }
493 }
494
495 for (++i; i < count; ++i) {
496 if (buf[i] >= '0' && buf[i] <= '9') {
497 h = 10*h + (buf[i] - '0');
498
499 if (h > ASUS_OLED_DISP_HEIGHT)
500 goto error_height;
501 } else if (tolower(buf[i]) == '>') {
502 break;
503 } else {
504 goto error_height;
505 }
506 }
507
508 if (w < 1 || w > ASUS_OLED_MAX_WIDTH)
509 goto error_width;
510
511 if (h < 1 || h > ASUS_OLED_DISP_HEIGHT)
512 goto error_height;
513
514 if (i >= count || buf[i] != '>')
515 goto error_header;
516
517 offs = i+1;
518
519 if (w % (odev->dev_width) != 0)
520 w_mem = (w/(odev->dev_width) + 1)*(odev->dev_width);
521 else
522 w_mem = w;
523
524 if (h < ASUS_OLED_DISP_HEIGHT)
525 h_mem = ASUS_OLED_DISP_HEIGHT;
526 else
527 h_mem = h;
528
529 odev->buf_size = w_mem * h_mem / 8;
530
531 kfree(odev->buf);
532 odev->buf = kmalloc(odev->buf_size, GFP_KERNEL);
533
534 if (odev->buf == NULL) {
535 odev->buf_size = 0;
536 printk(ASUS_OLED_ERROR "Out of memory!\n");
537 return -ENOMEM;
538 }
539
540 memset(odev->buf, 0xff, odev->buf_size);
541
542 odev->buf_offs = 0;
543 odev->width = w;
544 odev->height = h;
545 odev->x_shift = 0;
546 odev->y_shift = 0;
547 odev->last_val = 0;
548
549 if (odev->pic_mode == ASUS_OLED_FLASH) {
550 if (h < ASUS_OLED_DISP_HEIGHT/2)
551 odev->y_shift = (ASUS_OLED_DISP_HEIGHT/2 - h)/2;
552 } else {
553 if (h < ASUS_OLED_DISP_HEIGHT)
554 odev->y_shift = (ASUS_OLED_DISP_HEIGHT - h)/2;
555 }
556
557 if (w < (odev->dev_width))
558 odev->x_shift = ((odev->dev_width) - w)/2;
559 }
560
561 max_offs = odev->width * odev->height;
562
563 while (offs < count && odev->buf_offs < max_offs) {
564 int ret = 0;
565
566 if (buf[offs] == '1' || buf[offs] == '#') {
567 ret = append_values(odev, 1, 1);
568 if (ret < 0)
569 return ret;
570 } else if (buf[offs] == '0' || buf[offs] == ' ') {
571 ret = append_values(odev, 0, 1);
572 if (ret < 0)
573 return ret;
574 } else if (buf[offs] == '\n') {
575 /* New line detected. Lets assume, that all characters
576 till the end of the line were equal to the last
577 character in this line.*/
578 if (odev->buf_offs % odev->width != 0)
579 ret = append_values(odev, odev->last_val,
580 odev->width -
581 (odev->buf_offs %
582 odev->width));
583 if (ret < 0)
584 return ret;
585 }
586
587 offs++;
588 }
589
590 if (odev->buf_offs >= max_offs)
591 send_data(odev);
592
593 return count;
594
595 error_width:
596 printk(ASUS_OLED_ERROR "Wrong picture width specified.\n");
597 return -EIO;
598
599 error_height:
600 printk(ASUS_OLED_ERROR "Wrong picture height specified.\n");
601 return -EIO;
602
603 error_header:
604 printk(ASUS_OLED_ERROR "Wrong picture header.\n");
605 return -EIO;
606 }
607
608 static ssize_t set_picture(struct device *dev, struct device_attribute *attr,
609 const char *buf, size_t count)
610 {
611 struct usb_interface *intf = to_usb_interface(dev);
612
613 return odev_set_picture(usb_get_intfdata(intf), buf, count);
614 }
615
616 static ssize_t class_set_picture(struct device *device,
617 struct device_attribute *attr,
618 const char *buf, size_t count)
619 {
620 return odev_set_picture((struct asus_oled_dev *)
621 dev_get_drvdata(device), buf, count);
622 }
623
624 #define ASUS_OLED_DEVICE_ATTR(_file) dev_attr_asus_oled_##_file
625
626 static DEVICE_ATTR(asus_oled_enabled, S_IWUSR | S_IRUGO,
627 get_enabled, set_enabled);
628 static DEVICE_ATTR(asus_oled_picture, S_IWUSR , NULL, set_picture);
629
630 static DEVICE_ATTR(enabled, S_IWUSR | S_IRUGO,
631 class_get_enabled, class_set_enabled);
632 static DEVICE_ATTR(picture, S_IWUSR, NULL, class_set_picture);
633
634 static int asus_oled_probe(struct usb_interface *interface,
635 const struct usb_device_id *id)
636 {
637 struct usb_device *udev = interface_to_usbdev(interface);
638 struct asus_oled_dev *odev = NULL;
639 int retval = -ENOMEM;
640 uint16_t dev_width = 0;
641 enum oled_pack_mode pack_mode = PACK_MODE_LAST;
642 const struct oled_dev_desc_str *dev_desc = oled_dev_desc_table;
643 const char *desc = NULL;
644
645 if (!id) {
646 /* Even possible? Just to make sure...*/
647 dev_err(&interface->dev, "No usb_device_id provided!\n");
648 return -ENODEV;
649 }
650
651 for (; dev_desc->idVendor; dev_desc++) {
652 if (dev_desc->idVendor == id->idVendor
653 && dev_desc->idProduct == id->idProduct) {
654 dev_width = dev_desc->devWidth;
655 desc = dev_desc->devDesc;
656 pack_mode = dev_desc->packMode;
657 break;
658 }
659 }
660
661 if (!desc || dev_width < 1 || pack_mode == PACK_MODE_LAST) {
662 dev_err(&interface->dev,
663 "Missing or incomplete device description!\n");
664 return -ENODEV;
665 }
666
667 odev = kzalloc(sizeof(struct asus_oled_dev), GFP_KERNEL);
668
669 if (odev == NULL) {
670 dev_err(&interface->dev, "Out of memory\n");
671 return -ENOMEM;
672 }
673
674 odev->udev = usb_get_dev(udev);
675 odev->pic_mode = ASUS_OLED_STATIC;
676 odev->dev_width = dev_width;
677 odev->pack_mode = pack_mode;
678 odev->height = 0;
679 odev->width = 0;
680 odev->x_shift = 0;
681 odev->y_shift = 0;
682 odev->buf_offs = 0;
683 odev->buf_size = 0;
684 odev->last_val = 0;
685 odev->buf = NULL;
686 odev->enabled = 1;
687 odev->dev = NULL;
688
689 usb_set_intfdata(interface, odev);
690
691 retval = device_create_file(&interface->dev,
692 &ASUS_OLED_DEVICE_ATTR(enabled));
693 if (retval)
694 goto err_files;
695
696 retval = device_create_file(&interface->dev,
697 &ASUS_OLED_DEVICE_ATTR(picture));
698 if (retval)
699 goto err_files;
700
701 odev->dev = device_create(oled_class, &interface->dev, MKDEV(0, 0),
702 NULL, "oled_%d", ++oled_num);
703
704 if (IS_ERR(odev->dev)) {
705 retval = PTR_ERR(odev->dev);
706 goto err_files;
707 }
708
709 dev_set_drvdata(odev->dev, odev);
710
711 retval = device_create_file(odev->dev, &dev_attr_enabled);
712 if (retval)
713 goto err_class_enabled;
714
715 retval = device_create_file(odev->dev, &dev_attr_picture);
716 if (retval)
717 goto err_class_picture;
718
719 dev_info(&interface->dev,
720 "Attached Asus OLED device: %s [width %u, pack_mode %d]\n",
721 desc, odev->dev_width, odev->pack_mode);
722
723 if (start_off)
724 enable_oled(odev, 0);
725
726 return 0;
727
728 err_class_picture:
729 device_remove_file(odev->dev, &dev_attr_picture);
730
731 err_class_enabled:
732 device_remove_file(odev->dev, &dev_attr_enabled);
733 device_unregister(odev->dev);
734
735 err_files:
736 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
737 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
738
739 usb_set_intfdata(interface, NULL);
740 usb_put_dev(odev->udev);
741 kfree(odev);
742
743 return retval;
744 }
745
746 static void asus_oled_disconnect(struct usb_interface *interface)
747 {
748 struct asus_oled_dev *odev;
749
750 odev = usb_get_intfdata(interface);
751 usb_set_intfdata(interface, NULL);
752
753 device_remove_file(odev->dev, &dev_attr_picture);
754 device_remove_file(odev->dev, &dev_attr_enabled);
755 device_unregister(odev->dev);
756
757 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(picture));
758 device_remove_file(&interface->dev, &ASUS_OLED_DEVICE_ATTR(enabled));
759
760 usb_put_dev(odev->udev);
761
762 kfree(odev->buf);
763
764 kfree(odev);
765
766 dev_info(&interface->dev, "Disconnected Asus OLED device\n");
767 }
768
769 static struct usb_driver oled_driver = {
770 .name = ASUS_OLED_NAME,
771 .probe = asus_oled_probe,
772 .disconnect = asus_oled_disconnect,
773 .id_table = id_table,
774 };
775
776 static CLASS_ATTR_STRING(version, S_IRUGO,
777 ASUS_OLED_UNDERSCORE_NAME " " ASUS_OLED_VERSION);
778
779 static int __init asus_oled_init(void)
780 {
781 int retval = 0;
782 oled_class = class_create(THIS_MODULE, ASUS_OLED_UNDERSCORE_NAME);
783
784 if (IS_ERR(oled_class)) {
785 err("Error creating " ASUS_OLED_UNDERSCORE_NAME " class");
786 return PTR_ERR(oled_class);
787 }
788
789 retval = class_create_file(oled_class, &class_attr_version.attr);
790 if (retval) {
791 err("Error creating class version file");
792 goto error;
793 }
794
795 retval = usb_register(&oled_driver);
796
797 if (retval) {
798 err("usb_register failed. Error number %d", retval);
799 goto error;
800 }
801
802 return retval;
803
804 error:
805 class_destroy(oled_class);
806 return retval;
807 }
808
809 static void __exit asus_oled_exit(void)
810 {
811 usb_deregister(&oled_driver);
812 class_remove_file(oled_class, &class_attr_version.attr);
813 class_destroy(oled_class);
814 }
815
816 module_init(asus_oled_init);
817 module_exit(asus_oled_exit);
818
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree