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  */
31 static 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 */
53 struct 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 */
68 struct 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  */
116 static 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);
150 key_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;
174 key_still_down:
175 		continue;
176 	}
177 	return 1;
178 }
179 
180 static 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  */
216 int 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  */
253 static 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 
264 static 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 
293 static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
294 		picolcd_operation_mode_store);
295 
296 /*
297  * The "operation_mode_delay" sysfs attribute
298  */
299 static 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 
307 static 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 
321 static 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  */
327 static 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 	int ret = 0;
333 
334 	if (!data)
335 		return 1;
336 
337 	if (size > 64) {
338 		hid_warn(hdev, "invalid size value (%d) for picolcd raw event (%d)\n",
339 				size, report->id);
340 		return 0;
341 	}
342 
343 	if (report->id == REPORT_KEY_STATE) {
344 		if (data->input_keys)
345 			ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
346 	} else if (report->id == REPORT_IR_DATA) {
347 		ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
348 	} else {
349 		spin_lock_irqsave(&data->lock, flags);
350 		/*
351 		 * We let the caller of picolcd_send_and_wait() check if the
352 		 * report we got is one of the expected ones or not.
353 		 */
354 		if (data->pending) {
355 			memcpy(data->pending->raw_data, raw_data+1, size-1);
356 			data->pending->raw_size  = size-1;
357 			data->pending->in_report = report;
358 			complete(&data->pending->ready);
359 		}
360 		spin_unlock_irqrestore(&data->lock, flags);
361 	}
362 
363 	picolcd_debug_raw_event(data, hdev, report, raw_data, size);
364 	return 1;
365 }
366 
367 #ifdef CONFIG_PM
368 static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
369 {
370 	if (PMSG_IS_AUTO(message))
371 		return 0;
372 
373 	picolcd_suspend_backlight(hid_get_drvdata(hdev));
374 	dbg_hid(PICOLCD_NAME " device ready for suspend\n");
375 	return 0;
376 }
377 
378 static int picolcd_resume(struct hid_device *hdev)
379 {
380 	int ret;
381 	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
382 	if (ret)
383 		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
384 	return 0;
385 }
386 
387 static int picolcd_reset_resume(struct hid_device *hdev)
388 {
389 	int ret;
390 	ret = picolcd_reset(hdev);
391 	if (ret)
392 		dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
393 	ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
394 	if (ret)
395 		dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
396 	ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
397 	if (ret)
398 		dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
399 	ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
400 	if (ret)
401 		dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
402 	picolcd_leds_set(hid_get_drvdata(hdev));
403 	return 0;
404 }
405 #endif
406 
407 /* initialize keypad input device */
408 static int picolcd_init_keys(struct picolcd_data *data,
409 		struct hid_report *report)
410 {
411 	struct hid_device *hdev = data->hdev;
412 	struct input_dev *idev;
413 	int error, i;
414 
415 	if (!report)
416 		return -ENODEV;
417 	if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
418 			report->field[0]->report_size != 8) {
419 		hid_err(hdev, "unsupported KEY_STATE report\n");
420 		return -EINVAL;
421 	}
422 
423 	idev = input_allocate_device();
424 	if (idev == NULL) {
425 		hid_err(hdev, "failed to allocate input device\n");
426 		return -ENOMEM;
427 	}
428 	input_set_drvdata(idev, hdev);
429 	memcpy(data->keycode, def_keymap, sizeof(def_keymap));
430 	idev->name = hdev->name;
431 	idev->phys = hdev->phys;
432 	idev->uniq = hdev->uniq;
433 	idev->id.bustype = hdev->bus;
434 	idev->id.vendor  = hdev->vendor;
435 	idev->id.product = hdev->product;
436 	idev->id.version = hdev->version;
437 	idev->dev.parent = &hdev->dev;
438 	idev->keycode     = &data->keycode;
439 	idev->keycodemax  = PICOLCD_KEYS;
440 	idev->keycodesize = sizeof(data->keycode[0]);
441 	input_set_capability(idev, EV_MSC, MSC_SCAN);
442 	set_bit(EV_REP, idev->evbit);
443 	for (i = 0; i < PICOLCD_KEYS; i++)
444 		input_set_capability(idev, EV_KEY, data->keycode[i]);
445 	error = input_register_device(idev);
446 	if (error) {
447 		hid_err(hdev, "error registering the input device\n");
448 		input_free_device(idev);
449 		return error;
450 	}
451 	data->input_keys = idev;
452 	return 0;
453 }
454 
455 static void picolcd_exit_keys(struct picolcd_data *data)
456 {
457 	struct input_dev *idev = data->input_keys;
458 
459 	data->input_keys = NULL;
460 	if (idev)
461 		input_unregister_device(idev);
462 }
463 
464 static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
465 {
466 	int error;
467 
468 	/* Setup keypad input device */
469 	error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
470 	if (error)
471 		goto err;
472 
473 	/* Setup CIR input device */
474 	error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
475 	if (error)
476 		goto err;
477 
478 	/* Set up the framebuffer device */
479 	error = picolcd_init_framebuffer(data);
480 	if (error)
481 		goto err;
482 
483 	/* Setup lcd class device */
484 	error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
485 	if (error)
486 		goto err;
487 
488 	/* Setup backlight class device */
489 	error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
490 	if (error)
491 		goto err;
492 
493 	/* Setup the LED class devices */
494 	error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
495 	if (error)
496 		goto err;
497 
498 	picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
499 			picolcd_out_report(REPORT_EE_WRITE, hdev),
500 			picolcd_out_report(REPORT_READ_MEMORY, hdev),
501 			picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
502 			picolcd_out_report(REPORT_RESET, hdev));
503 	return 0;
504 err:
505 	picolcd_exit_leds(data);
506 	picolcd_exit_backlight(data);
507 	picolcd_exit_lcd(data);
508 	picolcd_exit_framebuffer(data);
509 	picolcd_exit_cir(data);
510 	picolcd_exit_keys(data);
511 	return error;
512 }
513 
514 static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
515 {
516 	picolcd_init_devfs(data, NULL, NULL,
517 			picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
518 			picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
519 	return 0;
520 }
521 
522 static int picolcd_probe(struct hid_device *hdev,
523 		     const struct hid_device_id *id)
524 {
525 	struct picolcd_data *data;
526 	int error = -ENOMEM;
527 
528 	dbg_hid(PICOLCD_NAME " hardware probe...\n");
529 
530 	/*
531 	 * Let's allocate the picolcd data structure, set some reasonable
532 	 * defaults, and associate it with the device
533 	 */
534 	data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
535 	if (data == NULL) {
536 		hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
537 		return -ENOMEM;
538 	}
539 
540 	spin_lock_init(&data->lock);
541 	mutex_init(&data->mutex);
542 	data->hdev = hdev;
543 	data->opmode_delay = 5000;
544 	if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
545 		data->status |= PICOLCD_BOOTLOADER;
546 	hid_set_drvdata(hdev, data);
547 
548 	/* Parse the device reports and start it up */
549 	error = hid_parse(hdev);
550 	if (error) {
551 		hid_err(hdev, "device report parse failed\n");
552 		goto err_cleanup_data;
553 	}
554 
555 	error = hid_hw_start(hdev, 0);
556 	if (error) {
557 		hid_err(hdev, "hardware start failed\n");
558 		goto err_cleanup_data;
559 	}
560 
561 	error = hid_hw_open(hdev);
562 	if (error) {
563 		hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
564 		goto err_cleanup_hid_hw;
565 	}
566 
567 	error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
568 	if (error) {
569 		hid_err(hdev, "failed to create sysfs attributes\n");
570 		goto err_cleanup_hid_ll;
571 	}
572 
573 	error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
574 	if (error) {
575 		hid_err(hdev, "failed to create sysfs attributes\n");
576 		goto err_cleanup_sysfs1;
577 	}
578 
579 	if (data->status & PICOLCD_BOOTLOADER)
580 		error = picolcd_probe_bootloader(hdev, data);
581 	else
582 		error = picolcd_probe_lcd(hdev, data);
583 	if (error)
584 		goto err_cleanup_sysfs2;
585 
586 	dbg_hid(PICOLCD_NAME " activated and initialized\n");
587 	return 0;
588 
589 err_cleanup_sysfs2:
590 	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
591 err_cleanup_sysfs1:
592 	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
593 err_cleanup_hid_ll:
594 	hid_hw_close(hdev);
595 err_cleanup_hid_hw:
596 	hid_hw_stop(hdev);
597 err_cleanup_data:
598 	kfree(data);
599 	return error;
600 }
601 
602 static void picolcd_remove(struct hid_device *hdev)
603 {
604 	struct picolcd_data *data = hid_get_drvdata(hdev);
605 	unsigned long flags;
606 
607 	dbg_hid(PICOLCD_NAME " hardware remove...\n");
608 	spin_lock_irqsave(&data->lock, flags);
609 	data->status |= PICOLCD_FAILED;
610 	spin_unlock_irqrestore(&data->lock, flags);
611 
612 	picolcd_exit_devfs(data);
613 	device_remove_file(&hdev->dev, &dev_attr_operation_mode);
614 	device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
615 	hid_hw_close(hdev);
616 	hid_hw_stop(hdev);
617 
618 	/* Shortcut potential pending reply that will never arrive */
619 	spin_lock_irqsave(&data->lock, flags);
620 	if (data->pending)
621 		complete(&data->pending->ready);
622 	spin_unlock_irqrestore(&data->lock, flags);
623 
624 	/* Cleanup LED */
625 	picolcd_exit_leds(data);
626 	/* Clean up the framebuffer */
627 	picolcd_exit_backlight(data);
628 	picolcd_exit_lcd(data);
629 	picolcd_exit_framebuffer(data);
630 	/* Cleanup input */
631 	picolcd_exit_cir(data);
632 	picolcd_exit_keys(data);
633 
634 	mutex_destroy(&data->mutex);
635 	/* Finally, clean up the picolcd data itself */
636 	kfree(data);
637 }
638 
639 static const struct hid_device_id picolcd_devices[] = {
640 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
641 	{ HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
642 	{ }
643 };
644 MODULE_DEVICE_TABLE(hid, picolcd_devices);
645 
646 static struct hid_driver picolcd_driver = {
647 	.name =          "hid-picolcd",
648 	.id_table =      picolcd_devices,
649 	.probe =         picolcd_probe,
650 	.remove =        picolcd_remove,
651 	.raw_event =     picolcd_raw_event,
652 #ifdef CONFIG_PM
653 	.suspend =       picolcd_suspend,
654 	.resume =        picolcd_resume,
655 	.reset_resume =  picolcd_reset_resume,
656 #endif
657 };
658 module_hid_driver(picolcd_driver);
659 
660 MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
661 MODULE_LICENSE("GPL v2");
662