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24c9d96d | 1 | // SPDX-License-Identifier: GPL-2.0-only |
fabdbf2f BP |
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 | * * | |
fabdbf2f BP |
8 | ***************************************************************************/ |
9 | ||
10 | #include <linux/hid.h> | |
11 | #include <linux/hid-debug.h> | |
12 | #include <linux/input.h> | |
13 | #include "hid-ids.h" | |
fabdbf2f BP |
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> | |
70cd8121 | 21 | #include <linux/string.h> |
fabdbf2f BP |
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 | } | |
a93ab849 BP |
97 | if (data->status & PICOLCD_FAILED) { |
98 | kfree(work); | |
99 | work = NULL; | |
100 | } else { | |
101 | data->pending = work; | |
d8814272 | 102 | hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT); |
a93ab849 BP |
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 | } | |
fabdbf2f BP |
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); | |
a93ab849 BP |
232 | if (data->status & PICOLCD_FAILED) { |
233 | spin_unlock_irqrestore(&data->lock, flags); | |
234 | return -ENODEV; | |
235 | } | |
d8814272 | 236 | hid_hw_request(hdev, report, HID_REQ_SET_REPORT); |
fabdbf2f BP |
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; | |
fabdbf2f BP |
269 | int timeout = data->opmode_delay; |
270 | unsigned long flags; | |
271 | ||
70cd8121 | 272 | if (sysfs_streq(buf, "lcd")) { |
fabdbf2f BP |
273 | if (data->status & PICOLCD_BOOTLOADER) |
274 | report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev); | |
70cd8121 | 275 | } else if (sysfs_streq(buf, "bootloader")) { |
fabdbf2f BP |
276 | if (!(data->status & PICOLCD_BOOTLOADER)) |
277 | report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev); | |
70cd8121 | 278 | } else { |
fabdbf2f | 279 | return -EINVAL; |
70cd8121 | 280 | } |
fabdbf2f | 281 | |
70cd8121 | 282 | if (!report || report->maxfield != 1) |
fabdbf2f BP |
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); | |
d8814272 | 288 | hid_hw_request(data->hdev, report, HID_REQ_SET_REPORT); |
fabdbf2f BP |
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 | ||
844817e4 | 337 | if (size > 64) { |
604b6077 JK |
338 | hid_warn(hdev, "invalid size value (%d) for picolcd raw event (%d)\n", |
339 | size, report->id); | |
844817e4 JK |
340 | return 0; |
341 | } | |
342 | ||
fabdbf2f BP |
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) { | |
ae08e324 | 347 | ret = picolcd_raw_cir(data, report, raw_data+1, size-1); |
fabdbf2f BP |
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; | |
eb9001cd | 437 | idev->dev.parent = &hdev->dev; |
fabdbf2f BP |
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 | ||
fabdbf2f BP |
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 | { | |
fabdbf2f BP |
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"); | |
87fcb6a6 | 537 | return -ENOMEM; |
fabdbf2f BP |
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 | ||
fabdbf2f | 555 | error = hid_hw_start(hdev, 0); |
fabdbf2f BP |
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); | |
fabdbf2f BP |
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); | |
fabdbf2f BP |
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 | }; | |
f425458e | 658 | module_hid_driver(picolcd_driver); |
fabdbf2f | 659 | |
fabdbf2f BP |
660 | MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver"); |
661 | MODULE_LICENSE("GPL v2"); |