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(size: sizeof(*work), GFP_KERNEL); |
82 | if (!work) |
83 | return NULL; |
84 | |
85 | init_completion(x: &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(objp: 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(lock: &data->lock, flags); |
104 | wait_for_completion_interruptible_timeout(x: &work->ready, HZ*2); |
105 | spin_lock_irqsave(&data->lock, flags); |
106 | data->pending = NULL; |
107 | } |
108 | spin_unlock_irqrestore(lock: &data->lock, flags); |
109 | mutex_unlock(lock: &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(dev: data->input_keys, EV_MSC, MSC_SCAN, value: 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(dev: data->input_keys, code: key_code, value: 1); |
148 | } |
149 | input_sync(dev: 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(dev: data->input_keys, EV_MSC, MSC_SCAN, value: 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(dev: data->input_keys, code: key_code, value: 0); |
171 | } |
172 | input_sync(dev: 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, size: 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(objp: 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(lock: &data->lock, flags); |
234 | return -ENODEV; |
235 | } |
236 | hid_hw_request(hdev, report, HID_REQ_SET_REPORT); |
237 | spin_unlock_irqrestore(lock: &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, fmt: "[bootloader] lcd\n" ); |
260 | else |
261 | return snprintf(buf, PAGE_SIZE, fmt: "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(s1: buf, s2: "lcd" )) { |
273 | if (data->status & PICOLCD_BOOTLOADER) |
274 | report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev); |
275 | } else if (sysfs_streq(s1: buf, s2: "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(lock: &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, fmt: "%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 | |
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: raw_data+1, size: size-1); |
345 | } else if (report->id == REPORT_IR_DATA) { |
346 | picolcd_raw_cir(data, report, raw_data: raw_data+1, size: 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(lock: &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 |
367 | static 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(data: hid_get_drvdata(hdev)); |
373 | dbg_hid(PICOLCD_NAME " device ready for suspend\n" ); |
374 | return 0; |
375 | } |
376 | |
377 | static int picolcd_resume(struct hid_device *hdev) |
378 | { |
379 | int ret; |
380 | ret = picolcd_resume_backlight(data: hid_get_drvdata(hdev)); |
381 | if (ret) |
382 | dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n" , ret); |
383 | return 0; |
384 | } |
385 | |
386 | static 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(data: hid_get_drvdata(hdev), clear: 0); |
393 | if (ret) |
394 | dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n" , ret); |
395 | ret = picolcd_resume_lcd(data: hid_get_drvdata(hdev)); |
396 | if (ret) |
397 | dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n" , ret); |
398 | ret = picolcd_resume_backlight(data: hid_get_drvdata(hdev)); |
399 | if (ret) |
400 | dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n" , ret); |
401 | picolcd_leds_set(data: hid_get_drvdata(hdev)); |
402 | return 0; |
403 | } |
404 | #endif |
405 | |
406 | /* initialize keypad input device */ |
407 | static 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(dev: idev, data: 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(dev: idev, EV_MSC, MSC_SCAN); |
441 | set_bit(EV_REP, addr: idev->evbit); |
442 | for (i = 0; i < PICOLCD_KEYS; i++) |
443 | input_set_capability(dev: idev, EV_KEY, code: 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(dev: idev); |
448 | return error; |
449 | } |
450 | data->input_keys = idev; |
451 | return 0; |
452 | } |
453 | |
454 | static 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 | |
463 | static 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; |
503 | err: |
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 | |
513 | static 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 | |
521 | static 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(size: 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, connect_mask: 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(device: &hdev->dev, entry: &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(device: &hdev->dev, entry: &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 | |
588 | err_cleanup_sysfs2: |
589 | device_remove_file(dev: &hdev->dev, attr: &dev_attr_operation_mode); |
590 | err_cleanup_sysfs1: |
591 | device_remove_file(dev: &hdev->dev, attr: &dev_attr_operation_mode_delay); |
592 | err_cleanup_hid_ll: |
593 | hid_hw_close(hdev); |
594 | err_cleanup_hid_hw: |
595 | hid_hw_stop(hdev); |
596 | err_cleanup_data: |
597 | kfree(objp: data); |
598 | return error; |
599 | } |
600 | |
601 | static 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(lock: &data->lock, flags); |
610 | |
611 | picolcd_exit_devfs(data); |
612 | device_remove_file(dev: &hdev->dev, attr: &dev_attr_operation_mode); |
613 | device_remove_file(dev: &hdev->dev, attr: &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(lock: &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(lock: &data->mutex); |
634 | /* Finally, clean up the picolcd data itself */ |
635 | kfree(objp: data); |
636 | } |
637 | |
638 | static 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 | }; |
643 | MODULE_DEVICE_TABLE(hid, picolcd_devices); |
644 | |
645 | static 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 | }; |
657 | module_hid_driver(picolcd_driver); |
658 | |
659 | MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver" ); |
660 | MODULE_LICENSE("GPL v2" ); |
661 | |