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1// SPDX-License-Identifier: GPL-2.0-only
2/***************************************************************************
3 * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> *
4 * *
5 * Based on Logitech G13 driver (v0.4) *
6 * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> *
7 * *
8 ***************************************************************************/
9
10#include <linux/hid.h>
11#include <linux/hid-debug.h>
12#include <linux/input.h>
13#include "hid-ids.h"
14
15#include <linux/fb.h>
16#include <linux/vmalloc.h>
17
18#include <linux/completion.h>
19#include <linux/uaccess.h>
20#include <linux/module.h>
21#include <linux/string.h>
22
23#include "hid-picolcd.h"
24
25
26/* Input device
27 *
28 * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys
29 * and header for 4x4 key matrix. The built-in keys are part of the matrix.
30 */
31static const unsigned short def_keymap[PICOLCD_KEYS] = {
32 KEY_RESERVED, /* none */
33 KEY_BACK, /* col 4 + row 1 */
34 KEY_HOMEPAGE, /* col 3 + row 1 */
35 KEY_RESERVED, /* col 2 + row 1 */
36 KEY_RESERVED, /* col 1 + row 1 */
37 KEY_SCROLLUP, /* col 4 + row 2 */
38 KEY_OK, /* col 3 + row 2 */
39 KEY_SCROLLDOWN, /* col 2 + row 2 */
40 KEY_RESERVED, /* col 1 + row 2 */
41 KEY_RESERVED, /* col 4 + row 3 */
42 KEY_RESERVED, /* col 3 + row 3 */
43 KEY_RESERVED, /* col 2 + row 3 */
44 KEY_RESERVED, /* col 1 + row 3 */
45 KEY_RESERVED, /* col 4 + row 4 */
46 KEY_RESERVED, /* col 3 + row 4 */
47 KEY_RESERVED, /* col 2 + row 4 */
48 KEY_RESERVED, /* col 1 + row 4 */
49};
50
51
52/* Find a given report */
53struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir)
54{
55 struct list_head *feature_report_list = &hdev->report_enum[dir].report_list;
56 struct hid_report *report = NULL;
57
58 list_for_each_entry(report, feature_report_list, list) {
59 if (report->id == id)
60 return report;
61 }
62 hid_warn(hdev, "No report with id 0x%x found\n", id);
63 return NULL;
64}
65
66/* Submit a report and wait for a reply from device - if device fades away
67 * or does not respond in time, return NULL */
68struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
69 int report_id, const u8 *raw_data, int size)
70{
71 struct picolcd_data *data = hid_get_drvdata(hdev);
72 struct picolcd_pending *work;
73 struct hid_report *report = picolcd_out_report(report_id, hdev);
74 unsigned long flags;
75 int i, j, k;
76
77 if (!report || !data)
78 return NULL;
79 if (data->status & PICOLCD_FAILED)
80 return NULL;
81 work = kzalloc(sizeof(*work), GFP_KERNEL);
82 if (!work)
83 return NULL;
84
85 init_completion(&work->ready);
86 work->out_report = report;
87 work->in_report = NULL;
88 work->raw_size = 0;
89
90 mutex_lock(&data->mutex);
91 spin_lock_irqsave(&data->lock, flags);
92 for (i = k = 0; i < report->maxfield; i++)
93 for (j = 0; j < report->field[i]->report_count; j++) {
94 hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
95 k++;
96 }
97 if (data->status & PICOLCD_FAILED) {
98 kfree(work);
99 work = NULL;
100 } else {
101 data->pending = work;
102 hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
103 spin_unlock_irqrestore(&data->lock, flags);
104 wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
105 spin_lock_irqsave(&data->lock, flags);
106 data->pending = NULL;
107 }
108 spin_unlock_irqrestore(&data->lock, flags);
109 mutex_unlock(&data->mutex);
110 return work;
111}
112
113/*
114 * input class device
115 */
116static int picolcd_raw_keypad(struct picolcd_data *data,
117 struct hid_report *report, u8 *raw_data, int size)
118{
119 /*
120 * Keypad event
121 * First and second data bytes list currently pressed keys,
122 * 0x00 means no key and at most 2 keys may be pressed at same time
123 */
124 int i, j;
125
126 /* determine newly pressed keys */
127 for (i = 0; i < size; i++) {
128 unsigned int key_code;
129 if (raw_data[i] == 0)
130 continue;
131 for (j = 0; j < sizeof(data->pressed_keys); j++)
132 if (data->pressed_keys[j] == raw_data[i])
133 goto key_already_down;
134 for (j = 0; j < sizeof(data->pressed_keys); j++)
135 if (data->pressed_keys[j] == 0) {
136 data->pressed_keys[j] = raw_data[i];
137 break;
138 }
139 input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]);
140 if (raw_data[i] < PICOLCD_KEYS)
141 key_code = data->keycode[raw_data[i]];
142 else
143 key_code = KEY_UNKNOWN;
144 if (key_code != KEY_UNKNOWN) {
145 dbg_hid(PICOLCD_NAME " got key press for %u:%d",
146 raw_data[i], key_code);
147 input_report_key(data->input_keys, key_code, 1);
148 }
149 input_sync(data->input_keys);
150key_already_down:
151 continue;
152 }
153
154 /* determine newly released keys */
155 for (j = 0; j < sizeof(data->pressed_keys); j++) {
156 unsigned int key_code;
157 if (data->pressed_keys[j] == 0)
158 continue;
159 for (i = 0; i < size; i++)
160 if (data->pressed_keys[j] == raw_data[i])
161 goto key_still_down;
162 input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]);
163 if (data->pressed_keys[j] < PICOLCD_KEYS)
164 key_code = data->keycode[data->pressed_keys[j]];
165 else
166 key_code = KEY_UNKNOWN;
167 if (key_code != KEY_UNKNOWN) {
168 dbg_hid(PICOLCD_NAME " got key release for %u:%d",
169 data->pressed_keys[j], key_code);
170 input_report_key(data->input_keys, key_code, 0);
171 }
172 input_sync(data->input_keys);
173 data->pressed_keys[j] = 0;
174key_still_down:
175 continue;
176 }
177 return 1;
178}
179
180static int picolcd_check_version(struct hid_device *hdev)
181{
182 struct picolcd_data *data = hid_get_drvdata(hdev);
183 struct picolcd_pending *verinfo;
184 int ret = 0;
185
186 if (!data)
187 return -ENODEV;
188
189 verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
190 if (!verinfo) {
191 hid_err(hdev, "no version response from PicoLCD\n");
192 return -ENODEV;
193 }
194
195 if (verinfo->raw_size == 2) {
196 data->version[0] = verinfo->raw_data[1];
197 data->version[1] = verinfo->raw_data[0];
198 if (data->status & PICOLCD_BOOTLOADER) {
199 hid_info(hdev, "PicoLCD, bootloader version %d.%d\n",
200 verinfo->raw_data[1], verinfo->raw_data[0]);
201 } else {
202 hid_info(hdev, "PicoLCD, firmware version %d.%d\n",
203 verinfo->raw_data[1], verinfo->raw_data[0]);
204 }
205 } else {
206 hid_err(hdev, "confused, got unexpected version response from PicoLCD\n");
207 ret = -EINVAL;
208 }
209 kfree(verinfo);
210 return ret;
211}
212
213/*
214 * Reset our device and wait for answer to VERSION request
215 */
216int picolcd_reset(struct hid_device *hdev)
217{
218 struct picolcd_data *data = hid_get_drvdata(hdev);
219 struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev);
220 unsigned long flags;
221 int error;
222
223 if (!data || !report || report->maxfield != 1)
224 return -ENODEV;
225
226 spin_lock_irqsave(&data->lock, flags);
227 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
228 data->status |= PICOLCD_BOOTLOADER;
229
230 /* perform the reset */
231 hid_set_field(report->field[0], 0, 1);
232 if (data->status & PICOLCD_FAILED) {
233 spin_unlock_irqrestore(&data->lock, flags);
234 return -ENODEV;
235 }
236 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
237 spin_unlock_irqrestore(&data->lock, flags);
238
239 error = picolcd_check_version(hdev);
240 if (error)
241 return error;
242
243 picolcd_resume_lcd(data);
244 picolcd_resume_backlight(data);
245 picolcd_fb_refresh(data);
246 picolcd_leds_set(data);
247 return 0;
248}
249
250/*
251 * The "operation_mode" sysfs attribute
252 */
253static ssize_t picolcd_operation_mode_show(struct device *dev,
254 struct device_attribute *attr, char *buf)
255{
256 struct picolcd_data *data = dev_get_drvdata(dev);
257
258 if (data->status & PICOLCD_BOOTLOADER)
259 return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
260 else
261 return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
262}
263
264static ssize_t picolcd_operation_mode_store(struct device *dev,
265 struct device_attribute *attr, const char *buf, size_t count)
266{
267 struct picolcd_data *data = dev_get_drvdata(dev);
268 struct hid_report *report = NULL;
269 int timeout = data->opmode_delay;
270 unsigned long flags;
271
272 if (sysfs_streq(buf, "lcd")) {
273 if (data->status & PICOLCD_BOOTLOADER)
274 report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
275 } else if (sysfs_streq(buf, "bootloader")) {
276 if (!(data->status & PICOLCD_BOOTLOADER))
277 report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
278 } else {
279 return -EINVAL;
280 }
281
282 if (!report || report->maxfield != 1)
283 return -EINVAL;
284
285 spin_lock_irqsave(&data->lock, flags);
286 hid_set_field(report->field[0], 0, timeout & 0xff);
287 hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
288 hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
289 spin_unlock_irqrestore(&data->lock, flags);
290 return count;
291}
292
293static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
294 picolcd_operation_mode_store);
295
296/*
297 * The "operation_mode_delay" sysfs attribute
298 */
299static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
300 struct device_attribute *attr, char *buf)
301{
302 struct picolcd_data *data = dev_get_drvdata(dev);
303
304 return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
305}
306
307static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
308 struct device_attribute *attr, const char *buf, size_t count)
309{
310 struct picolcd_data *data = dev_get_drvdata(dev);
311 unsigned u;
312 if (sscanf(buf, "%u", &u) != 1)
313 return -EINVAL;
314 if (u > 30000)
315 return -EINVAL;
316 else
317 data->opmode_delay = u;
318 return count;
319}
320
321static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
322 picolcd_operation_mode_delay_store);
323
324/*
325 * Handle raw report as sent by device
326 */
327static int picolcd_raw_event(struct hid_device *hdev,
328 struct hid_report *report, u8 *raw_data, int size)
329{
330 struct picolcd_data *data = hid_get_drvdata(hdev);
331 unsigned long flags;
332
333 if (!data)
334 return 1;
335
336 if (size > 64) {
337 hid_warn(hdev, "invalid size value (%d) for picolcd raw event (%d)\n",
338 size, report->id);
339 return 0;
340 }
341
342 if (report->id == REPORT_KEY_STATE) {
343 if (data->input_keys)
344 picolcd_raw_keypad(data, report, raw_data+1, size-1);
345 } else if (report->id == REPORT_IR_DATA) {
346 picolcd_raw_cir(data, report, raw_data+1, size-1);
347 } else {
348 spin_lock_irqsave(&data->lock, flags);
349 /*
350 * We let the caller of picolcd_send_and_wait() check if the
351 * report we got is one of the expected ones or not.
352 */
353 if (data->pending) {
354 memcpy(data->pending->raw_data, raw_data+1, size-1);
355 data->pending->raw_size = size-1;
356 data->pending->in_report = report;
357 complete(&data->pending->ready);
358 }
359 spin_unlock_irqrestore(&data->lock, flags);
360 }
361
362 picolcd_debug_raw_event(data, hdev, report, raw_data, size);
363 return 1;
364}
365
366#ifdef CONFIG_PM
367static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
368{
369 if (PMSG_IS_AUTO(message))
370 return 0;
371
372 picolcd_suspend_backlight(hid_get_drvdata(hdev));
373 dbg_hid(PICOLCD_NAME " device ready for suspend\n");
374 return 0;
375}
376
377static int picolcd_resume(struct hid_device *hdev)
378{
379 int ret;
380 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
381 if (ret)
382 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
383 return 0;
384}
385
386static int picolcd_reset_resume(struct hid_device *hdev)
387{
388 int ret;
389 ret = picolcd_reset(hdev);
390 if (ret)
391 dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
392 ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
393 if (ret)
394 dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
395 ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
396 if (ret)
397 dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
398 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
399 if (ret)
400 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
401 picolcd_leds_set(hid_get_drvdata(hdev));
402 return 0;
403}
404#endif
405
406/* initialize keypad input device */
407static int picolcd_init_keys(struct picolcd_data *data,
408 struct hid_report *report)
409{
410 struct hid_device *hdev = data->hdev;
411 struct input_dev *idev;
412 int error, i;
413
414 if (!report)
415 return -ENODEV;
416 if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
417 report->field[0]->report_size != 8) {
418 hid_err(hdev, "unsupported KEY_STATE report\n");
419 return -EINVAL;
420 }
421
422 idev = input_allocate_device();
423 if (idev == NULL) {
424 hid_err(hdev, "failed to allocate input device\n");
425 return -ENOMEM;
426 }
427 input_set_drvdata(idev, hdev);
428 memcpy(data->keycode, def_keymap, sizeof(def_keymap));
429 idev->name = hdev->name;
430 idev->phys = hdev->phys;
431 idev->uniq = hdev->uniq;
432 idev->id.bustype = hdev->bus;
433 idev->id.vendor = hdev->vendor;
434 idev->id.product = hdev->product;
435 idev->id.version = hdev->version;
436 idev->dev.parent = &hdev->dev;
437 idev->keycode = &data->keycode;
438 idev->keycodemax = PICOLCD_KEYS;
439 idev->keycodesize = sizeof(data->keycode[0]);
440 input_set_capability(idev, EV_MSC, MSC_SCAN);
441 set_bit(EV_REP, idev->evbit);
442 for (i = 0; i < PICOLCD_KEYS; i++)
443 input_set_capability(idev, EV_KEY, data->keycode[i]);
444 error = input_register_device(idev);
445 if (error) {
446 hid_err(hdev, "error registering the input device\n");
447 input_free_device(idev);
448 return error;
449 }
450 data->input_keys = idev;
451 return 0;
452}
453
454static void picolcd_exit_keys(struct picolcd_data *data)
455{
456 struct input_dev *idev = data->input_keys;
457
458 data->input_keys = NULL;
459 if (idev)
460 input_unregister_device(idev);
461}
462
463static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
464{
465 int error;
466
467 /* Setup keypad input device */
468 error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
469 if (error)
470 goto err;
471
472 /* Setup CIR input device */
473 error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
474 if (error)
475 goto err;
476
477 /* Set up the framebuffer device */
478 error = picolcd_init_framebuffer(data);
479 if (error)
480 goto err;
481
482 /* Setup lcd class device */
483 error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
484 if (error)
485 goto err;
486
487 /* Setup backlight class device */
488 error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
489 if (error)
490 goto err;
491
492 /* Setup the LED class devices */
493 error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
494 if (error)
495 goto err;
496
497 picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
498 picolcd_out_report(REPORT_EE_WRITE, hdev),
499 picolcd_out_report(REPORT_READ_MEMORY, hdev),
500 picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
501 picolcd_out_report(REPORT_RESET, hdev));
502 return 0;
503err:
504 picolcd_exit_leds(data);
505 picolcd_exit_backlight(data);
506 picolcd_exit_lcd(data);
507 picolcd_exit_framebuffer(data);
508 picolcd_exit_cir(data);
509 picolcd_exit_keys(data);
510 return error;
511}
512
513static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
514{
515 picolcd_init_devfs(data, NULL, NULL,
516 picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
517 picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
518 return 0;
519}
520
521static int picolcd_probe(struct hid_device *hdev,
522 const struct hid_device_id *id)
523{
524 struct picolcd_data *data;
525 int error = -ENOMEM;
526
527 dbg_hid(PICOLCD_NAME " hardware probe...\n");
528
529 /*
530 * Let's allocate the picolcd data structure, set some reasonable
531 * defaults, and associate it with the device
532 */
533 data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
534 if (data == NULL) {
535 hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
536 return -ENOMEM;
537 }
538
539 spin_lock_init(&data->lock);
540 mutex_init(&data->mutex);
541 data->hdev = hdev;
542 data->opmode_delay = 5000;
543 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
544 data->status |= PICOLCD_BOOTLOADER;
545 hid_set_drvdata(hdev, data);
546
547 /* Parse the device reports and start it up */
548 error = hid_parse(hdev);
549 if (error) {
550 hid_err(hdev, "device report parse failed\n");
551 goto err_cleanup_data;
552 }
553
554 error = hid_hw_start(hdev, 0);
555 if (error) {
556 hid_err(hdev, "hardware start failed\n");
557 goto err_cleanup_data;
558 }
559
560 error = hid_hw_open(hdev);
561 if (error) {
562 hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
563 goto err_cleanup_hid_hw;
564 }
565
566 error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
567 if (error) {
568 hid_err(hdev, "failed to create sysfs attributes\n");
569 goto err_cleanup_hid_ll;
570 }
571
572 error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
573 if (error) {
574 hid_err(hdev, "failed to create sysfs attributes\n");
575 goto err_cleanup_sysfs1;
576 }
577
578 if (data->status & PICOLCD_BOOTLOADER)
579 error = picolcd_probe_bootloader(hdev, data);
580 else
581 error = picolcd_probe_lcd(hdev, data);
582 if (error)
583 goto err_cleanup_sysfs2;
584
585 dbg_hid(PICOLCD_NAME " activated and initialized\n");
586 return 0;
587
588err_cleanup_sysfs2:
589 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
590err_cleanup_sysfs1:
591 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
592err_cleanup_hid_ll:
593 hid_hw_close(hdev);
594err_cleanup_hid_hw:
595 hid_hw_stop(hdev);
596err_cleanup_data:
597 kfree(data);
598 return error;
599}
600
601static void picolcd_remove(struct hid_device *hdev)
602{
603 struct picolcd_data *data = hid_get_drvdata(hdev);
604 unsigned long flags;
605
606 dbg_hid(PICOLCD_NAME " hardware remove...\n");
607 spin_lock_irqsave(&data->lock, flags);
608 data->status |= PICOLCD_FAILED;
609 spin_unlock_irqrestore(&data->lock, flags);
610
611 picolcd_exit_devfs(data);
612 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
613 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
614 hid_hw_close(hdev);
615 hid_hw_stop(hdev);
616
617 /* Shortcut potential pending reply that will never arrive */
618 spin_lock_irqsave(&data->lock, flags);
619 if (data->pending)
620 complete(&data->pending->ready);
621 spin_unlock_irqrestore(&data->lock, flags);
622
623 /* Cleanup LED */
624 picolcd_exit_leds(data);
625 /* Clean up the framebuffer */
626 picolcd_exit_backlight(data);
627 picolcd_exit_lcd(data);
628 picolcd_exit_framebuffer(data);
629 /* Cleanup input */
630 picolcd_exit_cir(data);
631 picolcd_exit_keys(data);
632
633 mutex_destroy(&data->mutex);
634 /* Finally, clean up the picolcd data itself */
635 kfree(data);
636}
637
638static const struct hid_device_id picolcd_devices[] = {
639 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
640 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
641 { }
642};
643MODULE_DEVICE_TABLE(hid, picolcd_devices);
644
645static struct hid_driver picolcd_driver = {
646 .name = "hid-picolcd",
647 .id_table = picolcd_devices,
648 .probe = picolcd_probe,
649 .remove = picolcd_remove,
650 .raw_event = picolcd_raw_event,
651#ifdef CONFIG_PM
652 .suspend = picolcd_suspend,
653 .resume = picolcd_resume,
654 .reset_resume = picolcd_reset_resume,
655#endif
656};
657module_hid_driver(picolcd_driver);
658
659MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
660MODULE_LICENSE("GPL v2");
1/***************************************************************************
2 * Copyright (C) 2010-2012 by Bruno Prémont <bonbons@linux-vserver.org> *
3 * *
4 * Based on Logitech G13 driver (v0.4) *
5 * Copyright (C) 2009 by Rick L. Vinyard, Jr. <rvinyard@cs.nmsu.edu> *
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, version 2 of the License. *
10 * *
11 * This driver is distributed in the hope that it will be useful, but *
12 * WITHOUT ANY WARRANTY; without even the implied warranty of *
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
14 * General Public License for more details. *
15 * *
16 * You should have received a copy of the GNU General Public License *
17 * along with this software. If not see <http://www.gnu.org/licenses/>. *
18 ***************************************************************************/
19
20#include <linux/hid.h>
21#include <linux/hid-debug.h>
22#include <linux/input.h>
23#include "hid-ids.h"
24
25#include <linux/fb.h>
26#include <linux/vmalloc.h>
27
28#include <linux/completion.h>
29#include <linux/uaccess.h>
30#include <linux/module.h>
31
32#include "hid-picolcd.h"
33
34
35/* Input device
36 *
37 * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys
38 * and header for 4x4 key matrix. The built-in keys are part of the matrix.
39 */
40static const unsigned short def_keymap[PICOLCD_KEYS] = {
41 KEY_RESERVED, /* none */
42 KEY_BACK, /* col 4 + row 1 */
43 KEY_HOMEPAGE, /* col 3 + row 1 */
44 KEY_RESERVED, /* col 2 + row 1 */
45 KEY_RESERVED, /* col 1 + row 1 */
46 KEY_SCROLLUP, /* col 4 + row 2 */
47 KEY_OK, /* col 3 + row 2 */
48 KEY_SCROLLDOWN, /* col 2 + row 2 */
49 KEY_RESERVED, /* col 1 + row 2 */
50 KEY_RESERVED, /* col 4 + row 3 */
51 KEY_RESERVED, /* col 3 + row 3 */
52 KEY_RESERVED, /* col 2 + row 3 */
53 KEY_RESERVED, /* col 1 + row 3 */
54 KEY_RESERVED, /* col 4 + row 4 */
55 KEY_RESERVED, /* col 3 + row 4 */
56 KEY_RESERVED, /* col 2 + row 4 */
57 KEY_RESERVED, /* col 1 + row 4 */
58};
59
60
61/* Find a given report */
62struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir)
63{
64 struct list_head *feature_report_list = &hdev->report_enum[dir].report_list;
65 struct hid_report *report = NULL;
66
67 list_for_each_entry(report, feature_report_list, list) {
68 if (report->id == id)
69 return report;
70 }
71 hid_warn(hdev, "No report with id 0x%x found\n", id);
72 return NULL;
73}
74
75/* Submit a report and wait for a reply from device - if device fades away
76 * or does not respond in time, return NULL */
77struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
78 int report_id, const u8 *raw_data, int size)
79{
80 struct picolcd_data *data = hid_get_drvdata(hdev);
81 struct picolcd_pending *work;
82 struct hid_report *report = picolcd_out_report(report_id, hdev);
83 unsigned long flags;
84 int i, j, k;
85
86 if (!report || !data)
87 return NULL;
88 if (data->status & PICOLCD_FAILED)
89 return NULL;
90 work = kzalloc(sizeof(*work), GFP_KERNEL);
91 if (!work)
92 return NULL;
93
94 init_completion(&work->ready);
95 work->out_report = report;
96 work->in_report = NULL;
97 work->raw_size = 0;
98
99 mutex_lock(&data->mutex);
100 spin_lock_irqsave(&data->lock, flags);
101 for (i = k = 0; i < report->maxfield; i++)
102 for (j = 0; j < report->field[i]->report_count; j++) {
103 hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
104 k++;
105 }
106 if (data->status & PICOLCD_FAILED) {
107 kfree(work);
108 work = NULL;
109 } else {
110 data->pending = work;
111 hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
112 spin_unlock_irqrestore(&data->lock, flags);
113 wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
114 spin_lock_irqsave(&data->lock, flags);
115 data->pending = NULL;
116 }
117 spin_unlock_irqrestore(&data->lock, flags);
118 mutex_unlock(&data->mutex);
119 return work;
120}
121
122/*
123 * input class device
124 */
125static int picolcd_raw_keypad(struct picolcd_data *data,
126 struct hid_report *report, u8 *raw_data, int size)
127{
128 /*
129 * Keypad event
130 * First and second data bytes list currently pressed keys,
131 * 0x00 means no key and at most 2 keys may be pressed at same time
132 */
133 int i, j;
134
135 /* determine newly pressed keys */
136 for (i = 0; i < size; i++) {
137 unsigned int key_code;
138 if (raw_data[i] == 0)
139 continue;
140 for (j = 0; j < sizeof(data->pressed_keys); j++)
141 if (data->pressed_keys[j] == raw_data[i])
142 goto key_already_down;
143 for (j = 0; j < sizeof(data->pressed_keys); j++)
144 if (data->pressed_keys[j] == 0) {
145 data->pressed_keys[j] = raw_data[i];
146 break;
147 }
148 input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]);
149 if (raw_data[i] < PICOLCD_KEYS)
150 key_code = data->keycode[raw_data[i]];
151 else
152 key_code = KEY_UNKNOWN;
153 if (key_code != KEY_UNKNOWN) {
154 dbg_hid(PICOLCD_NAME " got key press for %u:%d",
155 raw_data[i], key_code);
156 input_report_key(data->input_keys, key_code, 1);
157 }
158 input_sync(data->input_keys);
159key_already_down:
160 continue;
161 }
162
163 /* determine newly released keys */
164 for (j = 0; j < sizeof(data->pressed_keys); j++) {
165 unsigned int key_code;
166 if (data->pressed_keys[j] == 0)
167 continue;
168 for (i = 0; i < size; i++)
169 if (data->pressed_keys[j] == raw_data[i])
170 goto key_still_down;
171 input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]);
172 if (data->pressed_keys[j] < PICOLCD_KEYS)
173 key_code = data->keycode[data->pressed_keys[j]];
174 else
175 key_code = KEY_UNKNOWN;
176 if (key_code != KEY_UNKNOWN) {
177 dbg_hid(PICOLCD_NAME " got key release for %u:%d",
178 data->pressed_keys[j], key_code);
179 input_report_key(data->input_keys, key_code, 0);
180 }
181 input_sync(data->input_keys);
182 data->pressed_keys[j] = 0;
183key_still_down:
184 continue;
185 }
186 return 1;
187}
188
189static int picolcd_check_version(struct hid_device *hdev)
190{
191 struct picolcd_data *data = hid_get_drvdata(hdev);
192 struct picolcd_pending *verinfo;
193 int ret = 0;
194
195 if (!data)
196 return -ENODEV;
197
198 verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
199 if (!verinfo) {
200 hid_err(hdev, "no version response from PicoLCD\n");
201 return -ENODEV;
202 }
203
204 if (verinfo->raw_size == 2) {
205 data->version[0] = verinfo->raw_data[1];
206 data->version[1] = verinfo->raw_data[0];
207 if (data->status & PICOLCD_BOOTLOADER) {
208 hid_info(hdev, "PicoLCD, bootloader version %d.%d\n",
209 verinfo->raw_data[1], verinfo->raw_data[0]);
210 } else {
211 hid_info(hdev, "PicoLCD, firmware version %d.%d\n",
212 verinfo->raw_data[1], verinfo->raw_data[0]);
213 }
214 } else {
215 hid_err(hdev, "confused, got unexpected version response from PicoLCD\n");
216 ret = -EINVAL;
217 }
218 kfree(verinfo);
219 return ret;
220}
221
222/*
223 * Reset our device and wait for answer to VERSION request
224 */
225int picolcd_reset(struct hid_device *hdev)
226{
227 struct picolcd_data *data = hid_get_drvdata(hdev);
228 struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev);
229 unsigned long flags;
230 int error;
231
232 if (!data || !report || report->maxfield != 1)
233 return -ENODEV;
234
235 spin_lock_irqsave(&data->lock, flags);
236 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
237 data->status |= PICOLCD_BOOTLOADER;
238
239 /* perform the reset */
240 hid_set_field(report->field[0], 0, 1);
241 if (data->status & PICOLCD_FAILED) {
242 spin_unlock_irqrestore(&data->lock, flags);
243 return -ENODEV;
244 }
245 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
246 spin_unlock_irqrestore(&data->lock, flags);
247
248 error = picolcd_check_version(hdev);
249 if (error)
250 return error;
251
252 picolcd_resume_lcd(data);
253 picolcd_resume_backlight(data);
254 picolcd_fb_refresh(data);
255 picolcd_leds_set(data);
256 return 0;
257}
258
259/*
260 * The "operation_mode" sysfs attribute
261 */
262static ssize_t picolcd_operation_mode_show(struct device *dev,
263 struct device_attribute *attr, char *buf)
264{
265 struct picolcd_data *data = dev_get_drvdata(dev);
266
267 if (data->status & PICOLCD_BOOTLOADER)
268 return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
269 else
270 return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
271}
272
273static ssize_t picolcd_operation_mode_store(struct device *dev,
274 struct device_attribute *attr, const char *buf, size_t count)
275{
276 struct picolcd_data *data = dev_get_drvdata(dev);
277 struct hid_report *report = NULL;
278 size_t cnt = count;
279 int timeout = data->opmode_delay;
280 unsigned long flags;
281
282 if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
283 if (data->status & PICOLCD_BOOTLOADER)
284 report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
285 buf += 3;
286 cnt -= 3;
287 } else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
288 if (!(data->status & PICOLCD_BOOTLOADER))
289 report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
290 buf += 10;
291 cnt -= 10;
292 }
293 if (!report || report->maxfield != 1)
294 return -EINVAL;
295
296 while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
297 cnt--;
298 if (cnt != 0)
299 return -EINVAL;
300
301 spin_lock_irqsave(&data->lock, flags);
302 hid_set_field(report->field[0], 0, timeout & 0xff);
303 hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
304 hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT);
305 spin_unlock_irqrestore(&data->lock, flags);
306 return count;
307}
308
309static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
310 picolcd_operation_mode_store);
311
312/*
313 * The "operation_mode_delay" sysfs attribute
314 */
315static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
316 struct device_attribute *attr, char *buf)
317{
318 struct picolcd_data *data = dev_get_drvdata(dev);
319
320 return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
321}
322
323static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
324 struct device_attribute *attr, const char *buf, size_t count)
325{
326 struct picolcd_data *data = dev_get_drvdata(dev);
327 unsigned u;
328 if (sscanf(buf, "%u", &u) != 1)
329 return -EINVAL;
330 if (u > 30000)
331 return -EINVAL;
332 else
333 data->opmode_delay = u;
334 return count;
335}
336
337static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
338 picolcd_operation_mode_delay_store);
339
340/*
341 * Handle raw report as sent by device
342 */
343static int picolcd_raw_event(struct hid_device *hdev,
344 struct hid_report *report, u8 *raw_data, int size)
345{
346 struct picolcd_data *data = hid_get_drvdata(hdev);
347 unsigned long flags;
348 int ret = 0;
349
350 if (!data)
351 return 1;
352
353 if (size > 64) {
354 hid_warn(hdev, "invalid size value (%d) for picolcd raw event (%d)\n",
355 size, report->id);
356 return 0;
357 }
358
359 if (report->id == REPORT_KEY_STATE) {
360 if (data->input_keys)
361 ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
362 } else if (report->id == REPORT_IR_DATA) {
363 ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
364 } else {
365 spin_lock_irqsave(&data->lock, flags);
366 /*
367 * We let the caller of picolcd_send_and_wait() check if the
368 * report we got is one of the expected ones or not.
369 */
370 if (data->pending) {
371 memcpy(data->pending->raw_data, raw_data+1, size-1);
372 data->pending->raw_size = size-1;
373 data->pending->in_report = report;
374 complete(&data->pending->ready);
375 }
376 spin_unlock_irqrestore(&data->lock, flags);
377 }
378
379 picolcd_debug_raw_event(data, hdev, report, raw_data, size);
380 return 1;
381}
382
383#ifdef CONFIG_PM
384static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
385{
386 if (PMSG_IS_AUTO(message))
387 return 0;
388
389 picolcd_suspend_backlight(hid_get_drvdata(hdev));
390 dbg_hid(PICOLCD_NAME " device ready for suspend\n");
391 return 0;
392}
393
394static int picolcd_resume(struct hid_device *hdev)
395{
396 int ret;
397 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
398 if (ret)
399 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
400 return 0;
401}
402
403static int picolcd_reset_resume(struct hid_device *hdev)
404{
405 int ret;
406 ret = picolcd_reset(hdev);
407 if (ret)
408 dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
409 ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
410 if (ret)
411 dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
412 ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
413 if (ret)
414 dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
415 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
416 if (ret)
417 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
418 picolcd_leds_set(hid_get_drvdata(hdev));
419 return 0;
420}
421#endif
422
423/* initialize keypad input device */
424static int picolcd_init_keys(struct picolcd_data *data,
425 struct hid_report *report)
426{
427 struct hid_device *hdev = data->hdev;
428 struct input_dev *idev;
429 int error, i;
430
431 if (!report)
432 return -ENODEV;
433 if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
434 report->field[0]->report_size != 8) {
435 hid_err(hdev, "unsupported KEY_STATE report\n");
436 return -EINVAL;
437 }
438
439 idev = input_allocate_device();
440 if (idev == NULL) {
441 hid_err(hdev, "failed to allocate input device\n");
442 return -ENOMEM;
443 }
444 input_set_drvdata(idev, hdev);
445 memcpy(data->keycode, def_keymap, sizeof(def_keymap));
446 idev->name = hdev->name;
447 idev->phys = hdev->phys;
448 idev->uniq = hdev->uniq;
449 idev->id.bustype = hdev->bus;
450 idev->id.vendor = hdev->vendor;
451 idev->id.product = hdev->product;
452 idev->id.version = hdev->version;
453 idev->dev.parent = &hdev->dev;
454 idev->keycode = &data->keycode;
455 idev->keycodemax = PICOLCD_KEYS;
456 idev->keycodesize = sizeof(data->keycode[0]);
457 input_set_capability(idev, EV_MSC, MSC_SCAN);
458 set_bit(EV_REP, idev->evbit);
459 for (i = 0; i < PICOLCD_KEYS; i++)
460 input_set_capability(idev, EV_KEY, data->keycode[i]);
461 error = input_register_device(idev);
462 if (error) {
463 hid_err(hdev, "error registering the input device\n");
464 input_free_device(idev);
465 return error;
466 }
467 data->input_keys = idev;
468 return 0;
469}
470
471static void picolcd_exit_keys(struct picolcd_data *data)
472{
473 struct input_dev *idev = data->input_keys;
474
475 data->input_keys = NULL;
476 if (idev)
477 input_unregister_device(idev);
478}
479
480static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
481{
482 int error;
483
484 /* Setup keypad input device */
485 error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
486 if (error)
487 goto err;
488
489 /* Setup CIR input device */
490 error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
491 if (error)
492 goto err;
493
494 /* Set up the framebuffer device */
495 error = picolcd_init_framebuffer(data);
496 if (error)
497 goto err;
498
499 /* Setup lcd class device */
500 error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
501 if (error)
502 goto err;
503
504 /* Setup backlight class device */
505 error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
506 if (error)
507 goto err;
508
509 /* Setup the LED class devices */
510 error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
511 if (error)
512 goto err;
513
514 picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
515 picolcd_out_report(REPORT_EE_WRITE, hdev),
516 picolcd_out_report(REPORT_READ_MEMORY, hdev),
517 picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
518 picolcd_out_report(REPORT_RESET, hdev));
519 return 0;
520err:
521 picolcd_exit_leds(data);
522 picolcd_exit_backlight(data);
523 picolcd_exit_lcd(data);
524 picolcd_exit_framebuffer(data);
525 picolcd_exit_cir(data);
526 picolcd_exit_keys(data);
527 return error;
528}
529
530static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
531{
532 picolcd_init_devfs(data, NULL, NULL,
533 picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
534 picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
535 return 0;
536}
537
538static int picolcd_probe(struct hid_device *hdev,
539 const struct hid_device_id *id)
540{
541 struct picolcd_data *data;
542 int error = -ENOMEM;
543
544 dbg_hid(PICOLCD_NAME " hardware probe...\n");
545
546 /*
547 * Let's allocate the picolcd data structure, set some reasonable
548 * defaults, and associate it with the device
549 */
550 data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
551 if (data == NULL) {
552 hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
553 error = -ENOMEM;
554 goto err_no_cleanup;
555 }
556
557 spin_lock_init(&data->lock);
558 mutex_init(&data->mutex);
559 data->hdev = hdev;
560 data->opmode_delay = 5000;
561 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
562 data->status |= PICOLCD_BOOTLOADER;
563 hid_set_drvdata(hdev, data);
564
565 /* Parse the device reports and start it up */
566 error = hid_parse(hdev);
567 if (error) {
568 hid_err(hdev, "device report parse failed\n");
569 goto err_cleanup_data;
570 }
571
572 error = hid_hw_start(hdev, 0);
573 if (error) {
574 hid_err(hdev, "hardware start failed\n");
575 goto err_cleanup_data;
576 }
577
578 error = hid_hw_open(hdev);
579 if (error) {
580 hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
581 goto err_cleanup_hid_hw;
582 }
583
584 error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
585 if (error) {
586 hid_err(hdev, "failed to create sysfs attributes\n");
587 goto err_cleanup_hid_ll;
588 }
589
590 error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
591 if (error) {
592 hid_err(hdev, "failed to create sysfs attributes\n");
593 goto err_cleanup_sysfs1;
594 }
595
596 if (data->status & PICOLCD_BOOTLOADER)
597 error = picolcd_probe_bootloader(hdev, data);
598 else
599 error = picolcd_probe_lcd(hdev, data);
600 if (error)
601 goto err_cleanup_sysfs2;
602
603 dbg_hid(PICOLCD_NAME " activated and initialized\n");
604 return 0;
605
606err_cleanup_sysfs2:
607 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
608err_cleanup_sysfs1:
609 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
610err_cleanup_hid_ll:
611 hid_hw_close(hdev);
612err_cleanup_hid_hw:
613 hid_hw_stop(hdev);
614err_cleanup_data:
615 kfree(data);
616err_no_cleanup:
617 hid_set_drvdata(hdev, NULL);
618
619 return error;
620}
621
622static void picolcd_remove(struct hid_device *hdev)
623{
624 struct picolcd_data *data = hid_get_drvdata(hdev);
625 unsigned long flags;
626
627 dbg_hid(PICOLCD_NAME " hardware remove...\n");
628 spin_lock_irqsave(&data->lock, flags);
629 data->status |= PICOLCD_FAILED;
630 spin_unlock_irqrestore(&data->lock, flags);
631
632 picolcd_exit_devfs(data);
633 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
634 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
635 hid_hw_close(hdev);
636 hid_hw_stop(hdev);
637
638 /* Shortcut potential pending reply that will never arrive */
639 spin_lock_irqsave(&data->lock, flags);
640 if (data->pending)
641 complete(&data->pending->ready);
642 spin_unlock_irqrestore(&data->lock, flags);
643
644 /* Cleanup LED */
645 picolcd_exit_leds(data);
646 /* Clean up the framebuffer */
647 picolcd_exit_backlight(data);
648 picolcd_exit_lcd(data);
649 picolcd_exit_framebuffer(data);
650 /* Cleanup input */
651 picolcd_exit_cir(data);
652 picolcd_exit_keys(data);
653
654 hid_set_drvdata(hdev, NULL);
655 mutex_destroy(&data->mutex);
656 /* Finally, clean up the picolcd data itself */
657 kfree(data);
658}
659
660static const struct hid_device_id picolcd_devices[] = {
661 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
662 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
663 { }
664};
665MODULE_DEVICE_TABLE(hid, picolcd_devices);
666
667static struct hid_driver picolcd_driver = {
668 .name = "hid-picolcd",
669 .id_table = picolcd_devices,
670 .probe = picolcd_probe,
671 .remove = picolcd_remove,
672 .raw_event = picolcd_raw_event,
673#ifdef CONFIG_PM
674 .suspend = picolcd_suspend,
675 .resume = picolcd_resume,
676 .reset_resume = picolcd_reset_resume,
677#endif
678};
679module_hid_driver(picolcd_driver);
680
681MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
682MODULE_LICENSE("GPL v2");