Root/
1 | /*************************************************************************** |
2 | * Copyright (C) 2010 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 | #include "usbhid/usbhid.h" |
25 | #include <linux/usb.h> |
26 | |
27 | #include <linux/fb.h> |
28 | #include <linux/vmalloc.h> |
29 | #include <linux/backlight.h> |
30 | #include <linux/lcd.h> |
31 | |
32 | #include <linux/leds.h> |
33 | |
34 | #include <linux/seq_file.h> |
35 | #include <linux/debugfs.h> |
36 | |
37 | #include <linux/completion.h> |
38 | #include <linux/uaccess.h> |
39 | #include <linux/module.h> |
40 | |
41 | #define PICOLCD_NAME "PicoLCD (graphic)" |
42 | |
43 | /* Report numbers */ |
44 | #define REPORT_ERROR_CODE 0x10 /* LCD: IN[16] */ |
45 | #define ERR_SUCCESS 0x00 |
46 | #define ERR_PARAMETER_MISSING 0x01 |
47 | #define ERR_DATA_MISSING 0x02 |
48 | #define ERR_BLOCK_READ_ONLY 0x03 |
49 | #define ERR_BLOCK_NOT_ERASABLE 0x04 |
50 | #define ERR_BLOCK_TOO_BIG 0x05 |
51 | #define ERR_SECTION_OVERFLOW 0x06 |
52 | #define ERR_INVALID_CMD_LEN 0x07 |
53 | #define ERR_INVALID_DATA_LEN 0x08 |
54 | #define REPORT_KEY_STATE 0x11 /* LCD: IN[2] */ |
55 | #define REPORT_IR_DATA 0x21 /* LCD: IN[63] */ |
56 | #define REPORT_EE_DATA 0x32 /* LCD: IN[63] */ |
57 | #define REPORT_MEMORY 0x41 /* LCD: IN[63] */ |
58 | #define REPORT_LED_STATE 0x81 /* LCD: OUT[1] */ |
59 | #define REPORT_BRIGHTNESS 0x91 /* LCD: OUT[1] */ |
60 | #define REPORT_CONTRAST 0x92 /* LCD: OUT[1] */ |
61 | #define REPORT_RESET 0x93 /* LCD: OUT[2] */ |
62 | #define REPORT_LCD_CMD 0x94 /* LCD: OUT[63] */ |
63 | #define REPORT_LCD_DATA 0x95 /* LCD: OUT[63] */ |
64 | #define REPORT_LCD_CMD_DATA 0x96 /* LCD: OUT[63] */ |
65 | #define REPORT_EE_READ 0xa3 /* LCD: OUT[63] */ |
66 | #define REPORT_EE_WRITE 0xa4 /* LCD: OUT[63] */ |
67 | #define REPORT_ERASE_MEMORY 0xb2 /* LCD: OUT[2] */ |
68 | #define REPORT_READ_MEMORY 0xb3 /* LCD: OUT[3] */ |
69 | #define REPORT_WRITE_MEMORY 0xb4 /* LCD: OUT[63] */ |
70 | #define REPORT_SPLASH_RESTART 0xc1 /* LCD: OUT[1] */ |
71 | #define REPORT_EXIT_KEYBOARD 0xef /* LCD: OUT[2] */ |
72 | #define REPORT_VERSION 0xf1 /* LCD: IN[2],OUT[1] Bootloader: IN[2],OUT[1] */ |
73 | #define REPORT_BL_ERASE_MEMORY 0xf2 /* Bootloader: IN[36],OUT[4] */ |
74 | #define REPORT_BL_READ_MEMORY 0xf3 /* Bootloader: IN[36],OUT[4] */ |
75 | #define REPORT_BL_WRITE_MEMORY 0xf4 /* Bootloader: IN[36],OUT[36] */ |
76 | #define REPORT_DEVID 0xf5 /* LCD: IN[5], OUT[1] Bootloader: IN[5],OUT[1] */ |
77 | #define REPORT_SPLASH_SIZE 0xf6 /* LCD: IN[4], OUT[1] */ |
78 | #define REPORT_HOOK_VERSION 0xf7 /* LCD: IN[2], OUT[1] */ |
79 | #define REPORT_EXIT_FLASHER 0xff /* Bootloader: OUT[2] */ |
80 | |
81 | #ifdef CONFIG_HID_PICOLCD_FB |
82 | /* Framebuffer |
83 | * |
84 | * The PicoLCD use a Topway LCD module of 256x64 pixel |
85 | * This display area is tiled over 4 controllers with 8 tiles |
86 | * each. Each tile has 8x64 pixel, each data byte representing |
87 | * a 1-bit wide vertical line of the tile. |
88 | * |
89 | * The display can be updated at a tile granularity. |
90 | * |
91 | * Chip 1 Chip 2 Chip 3 Chip 4 |
92 | * +----------------+----------------+----------------+----------------+ |
93 | * | Tile 1 | Tile 1 | Tile 1 | Tile 1 | |
94 | * +----------------+----------------+----------------+----------------+ |
95 | * | Tile 2 | Tile 2 | Tile 2 | Tile 2 | |
96 | * +----------------+----------------+----------------+----------------+ |
97 | * ... |
98 | * +----------------+----------------+----------------+----------------+ |
99 | * | Tile 8 | Tile 8 | Tile 8 | Tile 8 | |
100 | * +----------------+----------------+----------------+----------------+ |
101 | */ |
102 | #define PICOLCDFB_NAME "picolcdfb" |
103 | #define PICOLCDFB_WIDTH (256) |
104 | #define PICOLCDFB_HEIGHT (64) |
105 | #define PICOLCDFB_SIZE (PICOLCDFB_WIDTH * PICOLCDFB_HEIGHT / 8) |
106 | |
107 | #define PICOLCDFB_UPDATE_RATE_LIMIT 10 |
108 | #define PICOLCDFB_UPDATE_RATE_DEFAULT 2 |
109 | |
110 | /* Framebuffer visual structures */ |
111 | static const struct fb_fix_screeninfo picolcdfb_fix = { |
112 | .id = PICOLCDFB_NAME, |
113 | .type = FB_TYPE_PACKED_PIXELS, |
114 | .visual = FB_VISUAL_MONO01, |
115 | .xpanstep = 0, |
116 | .ypanstep = 0, |
117 | .ywrapstep = 0, |
118 | .line_length = PICOLCDFB_WIDTH / 8, |
119 | .accel = FB_ACCEL_NONE, |
120 | }; |
121 | |
122 | static const struct fb_var_screeninfo picolcdfb_var = { |
123 | .xres = PICOLCDFB_WIDTH, |
124 | .yres = PICOLCDFB_HEIGHT, |
125 | .xres_virtual = PICOLCDFB_WIDTH, |
126 | .yres_virtual = PICOLCDFB_HEIGHT, |
127 | .width = 103, |
128 | .height = 26, |
129 | .bits_per_pixel = 1, |
130 | .grayscale = 1, |
131 | .red = { |
132 | .offset = 0, |
133 | .length = 1, |
134 | .msb_right = 0, |
135 | }, |
136 | .green = { |
137 | .offset = 0, |
138 | .length = 1, |
139 | .msb_right = 0, |
140 | }, |
141 | .blue = { |
142 | .offset = 0, |
143 | .length = 1, |
144 | .msb_right = 0, |
145 | }, |
146 | .transp = { |
147 | .offset = 0, |
148 | .length = 0, |
149 | .msb_right = 0, |
150 | }, |
151 | }; |
152 | #endif /* CONFIG_HID_PICOLCD_FB */ |
153 | |
154 | /* Input device |
155 | * |
156 | * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys |
157 | * and header for 4x4 key matrix. The built-in keys are part of the matrix. |
158 | */ |
159 | static const unsigned short def_keymap[] = { |
160 | KEY_RESERVED, /* none */ |
161 | KEY_BACK, /* col 4 + row 1 */ |
162 | KEY_HOMEPAGE, /* col 3 + row 1 */ |
163 | KEY_RESERVED, /* col 2 + row 1 */ |
164 | KEY_RESERVED, /* col 1 + row 1 */ |
165 | KEY_SCROLLUP, /* col 4 + row 2 */ |
166 | KEY_OK, /* col 3 + row 2 */ |
167 | KEY_SCROLLDOWN, /* col 2 + row 2 */ |
168 | KEY_RESERVED, /* col 1 + row 2 */ |
169 | KEY_RESERVED, /* col 4 + row 3 */ |
170 | KEY_RESERVED, /* col 3 + row 3 */ |
171 | KEY_RESERVED, /* col 2 + row 3 */ |
172 | KEY_RESERVED, /* col 1 + row 3 */ |
173 | KEY_RESERVED, /* col 4 + row 4 */ |
174 | KEY_RESERVED, /* col 3 + row 4 */ |
175 | KEY_RESERVED, /* col 2 + row 4 */ |
176 | KEY_RESERVED, /* col 1 + row 4 */ |
177 | }; |
178 | #define PICOLCD_KEYS ARRAY_SIZE(def_keymap) |
179 | |
180 | /* Description of in-progress IO operation, used for operations |
181 | * that trigger response from device */ |
182 | struct picolcd_pending { |
183 | struct hid_report *out_report; |
184 | struct hid_report *in_report; |
185 | struct completion ready; |
186 | int raw_size; |
187 | u8 raw_data[64]; |
188 | }; |
189 | |
190 | /* Per device data structure */ |
191 | struct picolcd_data { |
192 | struct hid_device *hdev; |
193 | #ifdef CONFIG_DEBUG_FS |
194 | struct dentry *debug_reset; |
195 | struct dentry *debug_eeprom; |
196 | struct dentry *debug_flash; |
197 | struct mutex mutex_flash; |
198 | int addr_sz; |
199 | #endif |
200 | u8 version[2]; |
201 | unsigned short opmode_delay; |
202 | /* input stuff */ |
203 | u8 pressed_keys[2]; |
204 | struct input_dev *input_keys; |
205 | struct input_dev *input_cir; |
206 | unsigned short keycode[PICOLCD_KEYS]; |
207 | |
208 | #ifdef CONFIG_HID_PICOLCD_FB |
209 | /* Framebuffer stuff */ |
210 | u8 fb_update_rate; |
211 | u8 fb_bpp; |
212 | u8 fb_force; |
213 | u8 *fb_vbitmap; /* local copy of what was sent to PicoLCD */ |
214 | u8 *fb_bitmap; /* framebuffer */ |
215 | struct fb_info *fb_info; |
216 | struct fb_deferred_io fb_defio; |
217 | #endif /* CONFIG_HID_PICOLCD_FB */ |
218 | #ifdef CONFIG_HID_PICOLCD_LCD |
219 | struct lcd_device *lcd; |
220 | u8 lcd_contrast; |
221 | #endif /* CONFIG_HID_PICOLCD_LCD */ |
222 | #ifdef CONFIG_HID_PICOLCD_BACKLIGHT |
223 | struct backlight_device *backlight; |
224 | u8 lcd_brightness; |
225 | u8 lcd_power; |
226 | #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */ |
227 | #ifdef CONFIG_HID_PICOLCD_LEDS |
228 | /* LED stuff */ |
229 | u8 led_state; |
230 | struct led_classdev *led[8]; |
231 | #endif /* CONFIG_HID_PICOLCD_LEDS */ |
232 | |
233 | /* Housekeeping stuff */ |
234 | spinlock_t lock; |
235 | struct mutex mutex; |
236 | struct picolcd_pending *pending; |
237 | int status; |
238 | #define PICOLCD_BOOTLOADER 1 |
239 | #define PICOLCD_FAILED 2 |
240 | #define PICOLCD_READY_FB 4 |
241 | }; |
242 | |
243 | |
244 | /* Find a given report */ |
245 | #define picolcd_in_report(id, dev) picolcd_report(id, dev, HID_INPUT_REPORT) |
246 | #define picolcd_out_report(id, dev) picolcd_report(id, dev, HID_OUTPUT_REPORT) |
247 | |
248 | static struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir) |
249 | { |
250 | struct list_head *feature_report_list = &hdev->report_enum[dir].report_list; |
251 | struct hid_report *report = NULL; |
252 | |
253 | list_for_each_entry(report, feature_report_list, list) { |
254 | if (report->id == id) |
255 | return report; |
256 | } |
257 | hid_warn(hdev, "No report with id 0x%x found\n", id); |
258 | return NULL; |
259 | } |
260 | |
261 | #ifdef CONFIG_DEBUG_FS |
262 | static void picolcd_debug_out_report(struct picolcd_data *data, |
263 | struct hid_device *hdev, struct hid_report *report); |
264 | #define usbhid_submit_report(a, b, c) \ |
265 | do { \ |
266 | picolcd_debug_out_report(hid_get_drvdata(a), a, b); \ |
267 | usbhid_submit_report(a, b, c); \ |
268 | } while (0) |
269 | #endif |
270 | |
271 | /* Submit a report and wait for a reply from device - if device fades away |
272 | * or does not respond in time, return NULL */ |
273 | static struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev, |
274 | int report_id, const u8 *raw_data, int size) |
275 | { |
276 | struct picolcd_data *data = hid_get_drvdata(hdev); |
277 | struct picolcd_pending *work; |
278 | struct hid_report *report = picolcd_out_report(report_id, hdev); |
279 | unsigned long flags; |
280 | int i, j, k; |
281 | |
282 | if (!report || !data) |
283 | return NULL; |
284 | if (data->status & PICOLCD_FAILED) |
285 | return NULL; |
286 | work = kzalloc(sizeof(*work), GFP_KERNEL); |
287 | if (!work) |
288 | return NULL; |
289 | |
290 | init_completion(&work->ready); |
291 | work->out_report = report; |
292 | work->in_report = NULL; |
293 | work->raw_size = 0; |
294 | |
295 | mutex_lock(&data->mutex); |
296 | spin_lock_irqsave(&data->lock, flags); |
297 | for (i = k = 0; i < report->maxfield; i++) |
298 | for (j = 0; j < report->field[i]->report_count; j++) { |
299 | hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0); |
300 | k++; |
301 | } |
302 | data->pending = work; |
303 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
304 | spin_unlock_irqrestore(&data->lock, flags); |
305 | wait_for_completion_interruptible_timeout(&work->ready, HZ*2); |
306 | spin_lock_irqsave(&data->lock, flags); |
307 | data->pending = NULL; |
308 | spin_unlock_irqrestore(&data->lock, flags); |
309 | mutex_unlock(&data->mutex); |
310 | return work; |
311 | } |
312 | |
313 | #ifdef CONFIG_HID_PICOLCD_FB |
314 | /* Send a given tile to PicoLCD */ |
315 | static int picolcd_fb_send_tile(struct hid_device *hdev, int chip, int tile) |
316 | { |
317 | struct picolcd_data *data = hid_get_drvdata(hdev); |
318 | struct hid_report *report1 = picolcd_out_report(REPORT_LCD_CMD_DATA, hdev); |
319 | struct hid_report *report2 = picolcd_out_report(REPORT_LCD_DATA, hdev); |
320 | unsigned long flags; |
321 | u8 *tdata; |
322 | int i; |
323 | |
324 | if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1) |
325 | return -ENODEV; |
326 | |
327 | spin_lock_irqsave(&data->lock, flags); |
328 | hid_set_field(report1->field[0], 0, chip << 2); |
329 | hid_set_field(report1->field[0], 1, 0x02); |
330 | hid_set_field(report1->field[0], 2, 0x00); |
331 | hid_set_field(report1->field[0], 3, 0x00); |
332 | hid_set_field(report1->field[0], 4, 0xb8 | tile); |
333 | hid_set_field(report1->field[0], 5, 0x00); |
334 | hid_set_field(report1->field[0], 6, 0x00); |
335 | hid_set_field(report1->field[0], 7, 0x40); |
336 | hid_set_field(report1->field[0], 8, 0x00); |
337 | hid_set_field(report1->field[0], 9, 0x00); |
338 | hid_set_field(report1->field[0], 10, 32); |
339 | |
340 | hid_set_field(report2->field[0], 0, (chip << 2) | 0x01); |
341 | hid_set_field(report2->field[0], 1, 0x00); |
342 | hid_set_field(report2->field[0], 2, 0x00); |
343 | hid_set_field(report2->field[0], 3, 32); |
344 | |
345 | tdata = data->fb_vbitmap + (tile * 4 + chip) * 64; |
346 | for (i = 0; i < 64; i++) |
347 | if (i < 32) |
348 | hid_set_field(report1->field[0], 11 + i, tdata[i]); |
349 | else |
350 | hid_set_field(report2->field[0], 4 + i - 32, tdata[i]); |
351 | |
352 | usbhid_submit_report(data->hdev, report1, USB_DIR_OUT); |
353 | usbhid_submit_report(data->hdev, report2, USB_DIR_OUT); |
354 | spin_unlock_irqrestore(&data->lock, flags); |
355 | return 0; |
356 | } |
357 | |
358 | /* Translate a single tile*/ |
359 | static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp, |
360 | int chip, int tile) |
361 | { |
362 | int i, b, changed = 0; |
363 | u8 tdata[64]; |
364 | u8 *vdata = vbitmap + (tile * 4 + chip) * 64; |
365 | |
366 | if (bpp == 1) { |
367 | for (b = 7; b >= 0; b--) { |
368 | const u8 *bdata = bitmap + tile * 256 + chip * 8 + b * 32; |
369 | for (i = 0; i < 64; i++) { |
370 | tdata[i] <<= 1; |
371 | tdata[i] |= (bdata[i/8] >> (i % 8)) & 0x01; |
372 | } |
373 | } |
374 | } else if (bpp == 8) { |
375 | for (b = 7; b >= 0; b--) { |
376 | const u8 *bdata = bitmap + (tile * 256 + chip * 8 + b * 32) * 8; |
377 | for (i = 0; i < 64; i++) { |
378 | tdata[i] <<= 1; |
379 | tdata[i] |= (bdata[i] & 0x80) ? 0x01 : 0x00; |
380 | } |
381 | } |
382 | } else { |
383 | /* Oops, we should never get here! */ |
384 | WARN_ON(1); |
385 | return 0; |
386 | } |
387 | |
388 | for (i = 0; i < 64; i++) |
389 | if (tdata[i] != vdata[i]) { |
390 | changed = 1; |
391 | vdata[i] = tdata[i]; |
392 | } |
393 | return changed; |
394 | } |
395 | |
396 | /* Reconfigure LCD display */ |
397 | static int picolcd_fb_reset(struct picolcd_data *data, int clear) |
398 | { |
399 | struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, data->hdev); |
400 | int i, j; |
401 | unsigned long flags; |
402 | static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 }; |
403 | |
404 | if (!report || report->maxfield != 1) |
405 | return -ENODEV; |
406 | |
407 | spin_lock_irqsave(&data->lock, flags); |
408 | for (i = 0; i < 4; i++) { |
409 | for (j = 0; j < report->field[0]->maxusage; j++) |
410 | if (j == 0) |
411 | hid_set_field(report->field[0], j, i << 2); |
412 | else if (j < sizeof(mapcmd)) |
413 | hid_set_field(report->field[0], j, mapcmd[j]); |
414 | else |
415 | hid_set_field(report->field[0], j, 0); |
416 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
417 | } |
418 | |
419 | data->status |= PICOLCD_READY_FB; |
420 | spin_unlock_irqrestore(&data->lock, flags); |
421 | |
422 | if (data->fb_bitmap) { |
423 | if (clear) { |
424 | memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE); |
425 | memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp); |
426 | } |
427 | data->fb_force = 1; |
428 | } |
429 | |
430 | /* schedule first output of framebuffer */ |
431 | if (data->fb_info) |
432 | schedule_delayed_work(&data->fb_info->deferred_work, 0); |
433 | |
434 | return 0; |
435 | } |
436 | |
437 | /* Update fb_vbitmap from the screen_base and send changed tiles to device */ |
438 | static void picolcd_fb_update(struct picolcd_data *data) |
439 | { |
440 | int chip, tile, n; |
441 | unsigned long flags; |
442 | |
443 | if (!data) |
444 | return; |
445 | |
446 | spin_lock_irqsave(&data->lock, flags); |
447 | if (!(data->status & PICOLCD_READY_FB)) { |
448 | spin_unlock_irqrestore(&data->lock, flags); |
449 | picolcd_fb_reset(data, 0); |
450 | } else { |
451 | spin_unlock_irqrestore(&data->lock, flags); |
452 | } |
453 | |
454 | /* |
455 | * Translate the framebuffer into the format needed by the PicoLCD. |
456 | * See display layout above. |
457 | * Do this one tile after the other and push those tiles that changed. |
458 | * |
459 | * Wait for our IO to complete as otherwise we might flood the queue! |
460 | */ |
461 | n = 0; |
462 | for (chip = 0; chip < 4; chip++) |
463 | for (tile = 0; tile < 8; tile++) |
464 | if (picolcd_fb_update_tile(data->fb_vbitmap, |
465 | data->fb_bitmap, data->fb_bpp, chip, tile) || |
466 | data->fb_force) { |
467 | n += 2; |
468 | if (!data->fb_info->par) |
469 | return; /* device lost! */ |
470 | if (n >= HID_OUTPUT_FIFO_SIZE / 2) { |
471 | usbhid_wait_io(data->hdev); |
472 | n = 0; |
473 | } |
474 | picolcd_fb_send_tile(data->hdev, chip, tile); |
475 | } |
476 | data->fb_force = false; |
477 | if (n) |
478 | usbhid_wait_io(data->hdev); |
479 | } |
480 | |
481 | /* Stub to call the system default and update the image on the picoLCD */ |
482 | static void picolcd_fb_fillrect(struct fb_info *info, |
483 | const struct fb_fillrect *rect) |
484 | { |
485 | if (!info->par) |
486 | return; |
487 | sys_fillrect(info, rect); |
488 | |
489 | schedule_delayed_work(&info->deferred_work, 0); |
490 | } |
491 | |
492 | /* Stub to call the system default and update the image on the picoLCD */ |
493 | static void picolcd_fb_copyarea(struct fb_info *info, |
494 | const struct fb_copyarea *area) |
495 | { |
496 | if (!info->par) |
497 | return; |
498 | sys_copyarea(info, area); |
499 | |
500 | schedule_delayed_work(&info->deferred_work, 0); |
501 | } |
502 | |
503 | /* Stub to call the system default and update the image on the picoLCD */ |
504 | static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image *image) |
505 | { |
506 | if (!info->par) |
507 | return; |
508 | sys_imageblit(info, image); |
509 | |
510 | schedule_delayed_work(&info->deferred_work, 0); |
511 | } |
512 | |
513 | /* |
514 | * this is the slow path from userspace. they can seek and write to |
515 | * the fb. it's inefficient to do anything less than a full screen draw |
516 | */ |
517 | static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf, |
518 | size_t count, loff_t *ppos) |
519 | { |
520 | ssize_t ret; |
521 | if (!info->par) |
522 | return -ENODEV; |
523 | ret = fb_sys_write(info, buf, count, ppos); |
524 | if (ret >= 0) |
525 | schedule_delayed_work(&info->deferred_work, 0); |
526 | return ret; |
527 | } |
528 | |
529 | static int picolcd_fb_blank(int blank, struct fb_info *info) |
530 | { |
531 | if (!info->par) |
532 | return -ENODEV; |
533 | /* We let fb notification do this for us via lcd/backlight device */ |
534 | return 0; |
535 | } |
536 | |
537 | static void picolcd_fb_destroy(struct fb_info *info) |
538 | { |
539 | struct picolcd_data *data = info->par; |
540 | u32 *ref_cnt = info->pseudo_palette; |
541 | int may_release; |
542 | |
543 | info->par = NULL; |
544 | if (data) |
545 | data->fb_info = NULL; |
546 | fb_deferred_io_cleanup(info); |
547 | |
548 | ref_cnt--; |
549 | mutex_lock(&info->lock); |
550 | (*ref_cnt)--; |
551 | may_release = !*ref_cnt; |
552 | mutex_unlock(&info->lock); |
553 | if (may_release) { |
554 | vfree((u8 *)info->fix.smem_start); |
555 | framebuffer_release(info); |
556 | } |
557 | } |
558 | |
559 | static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) |
560 | { |
561 | __u32 bpp = var->bits_per_pixel; |
562 | __u32 activate = var->activate; |
563 | |
564 | /* only allow 1/8 bit depth (8-bit is grayscale) */ |
565 | *var = picolcdfb_var; |
566 | var->activate = activate; |
567 | if (bpp >= 8) { |
568 | var->bits_per_pixel = 8; |
569 | var->red.length = 8; |
570 | var->green.length = 8; |
571 | var->blue.length = 8; |
572 | } else { |
573 | var->bits_per_pixel = 1; |
574 | var->red.length = 1; |
575 | var->green.length = 1; |
576 | var->blue.length = 1; |
577 | } |
578 | return 0; |
579 | } |
580 | |
581 | static int picolcd_set_par(struct fb_info *info) |
582 | { |
583 | struct picolcd_data *data = info->par; |
584 | u8 *tmp_fb, *o_fb; |
585 | if (!data) |
586 | return -ENODEV; |
587 | if (info->var.bits_per_pixel == data->fb_bpp) |
588 | return 0; |
589 | /* switch between 1/8 bit depths */ |
590 | if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8) |
591 | return -EINVAL; |
592 | |
593 | o_fb = data->fb_bitmap; |
594 | tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL); |
595 | if (!tmp_fb) |
596 | return -ENOMEM; |
597 | |
598 | /* translate FB content to new bits-per-pixel */ |
599 | if (info->var.bits_per_pixel == 1) { |
600 | int i, b; |
601 | for (i = 0; i < PICOLCDFB_SIZE; i++) { |
602 | u8 p = 0; |
603 | for (b = 0; b < 8; b++) { |
604 | p <<= 1; |
605 | p |= o_fb[i*8+b] ? 0x01 : 0x00; |
606 | } |
607 | tmp_fb[i] = p; |
608 | } |
609 | memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE); |
610 | info->fix.visual = FB_VISUAL_MONO01; |
611 | info->fix.line_length = PICOLCDFB_WIDTH / 8; |
612 | } else { |
613 | int i; |
614 | memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE); |
615 | for (i = 0; i < PICOLCDFB_SIZE * 8; i++) |
616 | o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00; |
617 | info->fix.visual = FB_VISUAL_DIRECTCOLOR; |
618 | info->fix.line_length = PICOLCDFB_WIDTH; |
619 | } |
620 | |
621 | kfree(tmp_fb); |
622 | data->fb_bpp = info->var.bits_per_pixel; |
623 | return 0; |
624 | } |
625 | |
626 | /* Do refcounting on our FB and cleanup per worker if FB is |
627 | * closed after unplug of our device |
628 | * (fb_release holds info->lock and still touches info after |
629 | * we return so we can't release it immediately. |
630 | */ |
631 | struct picolcd_fb_cleanup_item { |
632 | struct fb_info *info; |
633 | struct picolcd_fb_cleanup_item *next; |
634 | }; |
635 | static struct picolcd_fb_cleanup_item *fb_pending; |
636 | static DEFINE_SPINLOCK(fb_pending_lock); |
637 | |
638 | static void picolcd_fb_do_cleanup(struct work_struct *data) |
639 | { |
640 | struct picolcd_fb_cleanup_item *item; |
641 | unsigned long flags; |
642 | |
643 | do { |
644 | spin_lock_irqsave(&fb_pending_lock, flags); |
645 | item = fb_pending; |
646 | fb_pending = item ? item->next : NULL; |
647 | spin_unlock_irqrestore(&fb_pending_lock, flags); |
648 | |
649 | if (item) { |
650 | u8 *fb = (u8 *)item->info->fix.smem_start; |
651 | /* make sure we do not race against fb core when |
652 | * releasing */ |
653 | mutex_lock(&item->info->lock); |
654 | mutex_unlock(&item->info->lock); |
655 | framebuffer_release(item->info); |
656 | vfree(fb); |
657 | } |
658 | } while (item); |
659 | } |
660 | |
661 | static DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup); |
662 | |
663 | static int picolcd_fb_open(struct fb_info *info, int u) |
664 | { |
665 | u32 *ref_cnt = info->pseudo_palette; |
666 | ref_cnt--; |
667 | |
668 | (*ref_cnt)++; |
669 | return 0; |
670 | } |
671 | |
672 | static int picolcd_fb_release(struct fb_info *info, int u) |
673 | { |
674 | u32 *ref_cnt = info->pseudo_palette; |
675 | ref_cnt--; |
676 | |
677 | (*ref_cnt)++; |
678 | if (!*ref_cnt) { |
679 | unsigned long flags; |
680 | struct picolcd_fb_cleanup_item *item = (struct picolcd_fb_cleanup_item *)ref_cnt; |
681 | item--; |
682 | spin_lock_irqsave(&fb_pending_lock, flags); |
683 | item->next = fb_pending; |
684 | fb_pending = item; |
685 | spin_unlock_irqrestore(&fb_pending_lock, flags); |
686 | schedule_work(&picolcd_fb_cleanup); |
687 | } |
688 | return 0; |
689 | } |
690 | |
691 | /* Note this can't be const because of struct fb_info definition */ |
692 | static struct fb_ops picolcdfb_ops = { |
693 | .owner = THIS_MODULE, |
694 | .fb_destroy = picolcd_fb_destroy, |
695 | .fb_open = picolcd_fb_open, |
696 | .fb_release = picolcd_fb_release, |
697 | .fb_read = fb_sys_read, |
698 | .fb_write = picolcd_fb_write, |
699 | .fb_blank = picolcd_fb_blank, |
700 | .fb_fillrect = picolcd_fb_fillrect, |
701 | .fb_copyarea = picolcd_fb_copyarea, |
702 | .fb_imageblit = picolcd_fb_imageblit, |
703 | .fb_check_var = picolcd_fb_check_var, |
704 | .fb_set_par = picolcd_set_par, |
705 | }; |
706 | |
707 | |
708 | /* Callback from deferred IO workqueue */ |
709 | static void picolcd_fb_deferred_io(struct fb_info *info, struct list_head *pagelist) |
710 | { |
711 | picolcd_fb_update(info->par); |
712 | } |
713 | |
714 | static const struct fb_deferred_io picolcd_fb_defio = { |
715 | .delay = HZ / PICOLCDFB_UPDATE_RATE_DEFAULT, |
716 | .deferred_io = picolcd_fb_deferred_io, |
717 | }; |
718 | |
719 | |
720 | /* |
721 | * The "fb_update_rate" sysfs attribute |
722 | */ |
723 | static ssize_t picolcd_fb_update_rate_show(struct device *dev, |
724 | struct device_attribute *attr, char *buf) |
725 | { |
726 | struct picolcd_data *data = dev_get_drvdata(dev); |
727 | unsigned i, fb_update_rate = data->fb_update_rate; |
728 | size_t ret = 0; |
729 | |
730 | for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++) |
731 | if (ret >= PAGE_SIZE) |
732 | break; |
733 | else if (i == fb_update_rate) |
734 | ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i); |
735 | else |
736 | ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i); |
737 | if (ret > 0) |
738 | buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n'; |
739 | return ret; |
740 | } |
741 | |
742 | static ssize_t picolcd_fb_update_rate_store(struct device *dev, |
743 | struct device_attribute *attr, const char *buf, size_t count) |
744 | { |
745 | struct picolcd_data *data = dev_get_drvdata(dev); |
746 | int i; |
747 | unsigned u; |
748 | |
749 | if (count < 1 || count > 10) |
750 | return -EINVAL; |
751 | |
752 | i = sscanf(buf, "%u", &u); |
753 | if (i != 1) |
754 | return -EINVAL; |
755 | |
756 | if (u > PICOLCDFB_UPDATE_RATE_LIMIT) |
757 | return -ERANGE; |
758 | else if (u == 0) |
759 | u = PICOLCDFB_UPDATE_RATE_DEFAULT; |
760 | |
761 | data->fb_update_rate = u; |
762 | data->fb_defio.delay = HZ / data->fb_update_rate; |
763 | return count; |
764 | } |
765 | |
766 | static DEVICE_ATTR(fb_update_rate, 0666, picolcd_fb_update_rate_show, |
767 | picolcd_fb_update_rate_store); |
768 | |
769 | /* initialize Framebuffer device */ |
770 | static int picolcd_init_framebuffer(struct picolcd_data *data) |
771 | { |
772 | struct device *dev = &data->hdev->dev; |
773 | struct fb_info *info = NULL; |
774 | int i, error = -ENOMEM; |
775 | u8 *fb_vbitmap = NULL; |
776 | u8 *fb_bitmap = NULL; |
777 | u32 *palette; |
778 | |
779 | fb_bitmap = vmalloc(PICOLCDFB_SIZE*8); |
780 | if (fb_bitmap == NULL) { |
781 | dev_err(dev, "can't get a free page for framebuffer\n"); |
782 | goto err_nomem; |
783 | } |
784 | |
785 | fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL); |
786 | if (fb_vbitmap == NULL) { |
787 | dev_err(dev, "can't alloc vbitmap image buffer\n"); |
788 | goto err_nomem; |
789 | } |
790 | |
791 | data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT; |
792 | data->fb_defio = picolcd_fb_defio; |
793 | /* The extra memory is: |
794 | * - struct picolcd_fb_cleanup_item |
795 | * - u32 for ref_count |
796 | * - 256*u32 for pseudo_palette |
797 | */ |
798 | info = framebuffer_alloc(257 * sizeof(u32) + sizeof(struct picolcd_fb_cleanup_item), dev); |
799 | if (info == NULL) { |
800 | dev_err(dev, "failed to allocate a framebuffer\n"); |
801 | goto err_nomem; |
802 | } |
803 | |
804 | palette = info->par + sizeof(struct picolcd_fb_cleanup_item); |
805 | *palette = 1; |
806 | palette++; |
807 | for (i = 0; i < 256; i++) |
808 | palette[i] = i > 0 && i < 16 ? 0xff : 0; |
809 | info->pseudo_palette = palette; |
810 | info->fbdefio = &data->fb_defio; |
811 | info->screen_base = (char __force __iomem *)fb_bitmap; |
812 | info->fbops = &picolcdfb_ops; |
813 | info->var = picolcdfb_var; |
814 | info->fix = picolcdfb_fix; |
815 | info->fix.smem_len = PICOLCDFB_SIZE*8; |
816 | info->fix.smem_start = (unsigned long)fb_bitmap; |
817 | info->par = data; |
818 | info->flags = FBINFO_FLAG_DEFAULT; |
819 | |
820 | data->fb_vbitmap = fb_vbitmap; |
821 | data->fb_bitmap = fb_bitmap; |
822 | data->fb_bpp = picolcdfb_var.bits_per_pixel; |
823 | error = picolcd_fb_reset(data, 1); |
824 | if (error) { |
825 | dev_err(dev, "failed to configure display\n"); |
826 | goto err_cleanup; |
827 | } |
828 | error = device_create_file(dev, &dev_attr_fb_update_rate); |
829 | if (error) { |
830 | dev_err(dev, "failed to create sysfs attributes\n"); |
831 | goto err_cleanup; |
832 | } |
833 | fb_deferred_io_init(info); |
834 | data->fb_info = info; |
835 | error = register_framebuffer(info); |
836 | if (error) { |
837 | dev_err(dev, "failed to register framebuffer\n"); |
838 | goto err_sysfs; |
839 | } |
840 | /* schedule first output of framebuffer */ |
841 | data->fb_force = 1; |
842 | schedule_delayed_work(&info->deferred_work, 0); |
843 | return 0; |
844 | |
845 | err_sysfs: |
846 | fb_deferred_io_cleanup(info); |
847 | device_remove_file(dev, &dev_attr_fb_update_rate); |
848 | err_cleanup: |
849 | data->fb_vbitmap = NULL; |
850 | data->fb_bitmap = NULL; |
851 | data->fb_bpp = 0; |
852 | data->fb_info = NULL; |
853 | |
854 | err_nomem: |
855 | framebuffer_release(info); |
856 | vfree(fb_bitmap); |
857 | kfree(fb_vbitmap); |
858 | return error; |
859 | } |
860 | |
861 | static void picolcd_exit_framebuffer(struct picolcd_data *data) |
862 | { |
863 | struct fb_info *info = data->fb_info; |
864 | u8 *fb_vbitmap = data->fb_vbitmap; |
865 | |
866 | if (!info) |
867 | return; |
868 | |
869 | info->par = NULL; |
870 | device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate); |
871 | unregister_framebuffer(info); |
872 | data->fb_vbitmap = NULL; |
873 | data->fb_bitmap = NULL; |
874 | data->fb_bpp = 0; |
875 | data->fb_info = NULL; |
876 | kfree(fb_vbitmap); |
877 | } |
878 | |
879 | #define picolcd_fbinfo(d) ((d)->fb_info) |
880 | #else |
881 | static inline int picolcd_fb_reset(struct picolcd_data *data, int clear) |
882 | { |
883 | return 0; |
884 | } |
885 | static inline int picolcd_init_framebuffer(struct picolcd_data *data) |
886 | { |
887 | return 0; |
888 | } |
889 | static inline void picolcd_exit_framebuffer(struct picolcd_data *data) |
890 | { |
891 | } |
892 | #define picolcd_fbinfo(d) NULL |
893 | #endif /* CONFIG_HID_PICOLCD_FB */ |
894 | |
895 | #ifdef CONFIG_HID_PICOLCD_BACKLIGHT |
896 | /* |
897 | * backlight class device |
898 | */ |
899 | static int picolcd_get_brightness(struct backlight_device *bdev) |
900 | { |
901 | struct picolcd_data *data = bl_get_data(bdev); |
902 | return data->lcd_brightness; |
903 | } |
904 | |
905 | static int picolcd_set_brightness(struct backlight_device *bdev) |
906 | { |
907 | struct picolcd_data *data = bl_get_data(bdev); |
908 | struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev); |
909 | unsigned long flags; |
910 | |
911 | if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
912 | return -ENODEV; |
913 | |
914 | data->lcd_brightness = bdev->props.brightness & 0x0ff; |
915 | data->lcd_power = bdev->props.power; |
916 | spin_lock_irqsave(&data->lock, flags); |
917 | hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0); |
918 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
919 | spin_unlock_irqrestore(&data->lock, flags); |
920 | return 0; |
921 | } |
922 | |
923 | static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb) |
924 | { |
925 | return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev)); |
926 | } |
927 | |
928 | static const struct backlight_ops picolcd_blops = { |
929 | .update_status = picolcd_set_brightness, |
930 | .get_brightness = picolcd_get_brightness, |
931 | .check_fb = picolcd_check_bl_fb, |
932 | }; |
933 | |
934 | static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report) |
935 | { |
936 | struct device *dev = &data->hdev->dev; |
937 | struct backlight_device *bdev; |
938 | struct backlight_properties props; |
939 | if (!report) |
940 | return -ENODEV; |
941 | if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
942 | report->field[0]->report_size != 8) { |
943 | dev_err(dev, "unsupported BRIGHTNESS report"); |
944 | return -EINVAL; |
945 | } |
946 | |
947 | memset(&props, 0, sizeof(props)); |
948 | props.type = BACKLIGHT_RAW; |
949 | props.max_brightness = 0xff; |
950 | bdev = backlight_device_register(dev_name(dev), dev, data, |
951 | &picolcd_blops, &props); |
952 | if (IS_ERR(bdev)) { |
953 | dev_err(dev, "failed to register backlight\n"); |
954 | return PTR_ERR(bdev); |
955 | } |
956 | bdev->props.brightness = 0xff; |
957 | data->lcd_brightness = 0xff; |
958 | data->backlight = bdev; |
959 | picolcd_set_brightness(bdev); |
960 | return 0; |
961 | } |
962 | |
963 | static void picolcd_exit_backlight(struct picolcd_data *data) |
964 | { |
965 | struct backlight_device *bdev = data->backlight; |
966 | |
967 | data->backlight = NULL; |
968 | if (bdev) |
969 | backlight_device_unregister(bdev); |
970 | } |
971 | |
972 | static inline int picolcd_resume_backlight(struct picolcd_data *data) |
973 | { |
974 | if (!data->backlight) |
975 | return 0; |
976 | return picolcd_set_brightness(data->backlight); |
977 | } |
978 | |
979 | #ifdef CONFIG_PM |
980 | static void picolcd_suspend_backlight(struct picolcd_data *data) |
981 | { |
982 | int bl_power = data->lcd_power; |
983 | if (!data->backlight) |
984 | return; |
985 | |
986 | data->backlight->props.power = FB_BLANK_POWERDOWN; |
987 | picolcd_set_brightness(data->backlight); |
988 | data->lcd_power = data->backlight->props.power = bl_power; |
989 | } |
990 | #endif /* CONFIG_PM */ |
991 | #else |
992 | static inline int picolcd_init_backlight(struct picolcd_data *data, |
993 | struct hid_report *report) |
994 | { |
995 | return 0; |
996 | } |
997 | static inline void picolcd_exit_backlight(struct picolcd_data *data) |
998 | { |
999 | } |
1000 | static inline int picolcd_resume_backlight(struct picolcd_data *data) |
1001 | { |
1002 | return 0; |
1003 | } |
1004 | static inline void picolcd_suspend_backlight(struct picolcd_data *data) |
1005 | { |
1006 | } |
1007 | #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */ |
1008 | |
1009 | #ifdef CONFIG_HID_PICOLCD_LCD |
1010 | /* |
1011 | * lcd class device |
1012 | */ |
1013 | static int picolcd_get_contrast(struct lcd_device *ldev) |
1014 | { |
1015 | struct picolcd_data *data = lcd_get_data(ldev); |
1016 | return data->lcd_contrast; |
1017 | } |
1018 | |
1019 | static int picolcd_set_contrast(struct lcd_device *ldev, int contrast) |
1020 | { |
1021 | struct picolcd_data *data = lcd_get_data(ldev); |
1022 | struct hid_report *report = picolcd_out_report(REPORT_CONTRAST, data->hdev); |
1023 | unsigned long flags; |
1024 | |
1025 | if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
1026 | return -ENODEV; |
1027 | |
1028 | data->lcd_contrast = contrast & 0x0ff; |
1029 | spin_lock_irqsave(&data->lock, flags); |
1030 | hid_set_field(report->field[0], 0, data->lcd_contrast); |
1031 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
1032 | spin_unlock_irqrestore(&data->lock, flags); |
1033 | return 0; |
1034 | } |
1035 | |
1036 | static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb) |
1037 | { |
1038 | return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev)); |
1039 | } |
1040 | |
1041 | static struct lcd_ops picolcd_lcdops = { |
1042 | .get_contrast = picolcd_get_contrast, |
1043 | .set_contrast = picolcd_set_contrast, |
1044 | .check_fb = picolcd_check_lcd_fb, |
1045 | }; |
1046 | |
1047 | static int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report) |
1048 | { |
1049 | struct device *dev = &data->hdev->dev; |
1050 | struct lcd_device *ldev; |
1051 | |
1052 | if (!report) |
1053 | return -ENODEV; |
1054 | if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
1055 | report->field[0]->report_size != 8) { |
1056 | dev_err(dev, "unsupported CONTRAST report"); |
1057 | return -EINVAL; |
1058 | } |
1059 | |
1060 | ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops); |
1061 | if (IS_ERR(ldev)) { |
1062 | dev_err(dev, "failed to register LCD\n"); |
1063 | return PTR_ERR(ldev); |
1064 | } |
1065 | ldev->props.max_contrast = 0x0ff; |
1066 | data->lcd_contrast = 0xe5; |
1067 | data->lcd = ldev; |
1068 | picolcd_set_contrast(ldev, 0xe5); |
1069 | return 0; |
1070 | } |
1071 | |
1072 | static void picolcd_exit_lcd(struct picolcd_data *data) |
1073 | { |
1074 | struct lcd_device *ldev = data->lcd; |
1075 | |
1076 | data->lcd = NULL; |
1077 | if (ldev) |
1078 | lcd_device_unregister(ldev); |
1079 | } |
1080 | |
1081 | static inline int picolcd_resume_lcd(struct picolcd_data *data) |
1082 | { |
1083 | if (!data->lcd) |
1084 | return 0; |
1085 | return picolcd_set_contrast(data->lcd, data->lcd_contrast); |
1086 | } |
1087 | #else |
1088 | static inline int picolcd_init_lcd(struct picolcd_data *data, |
1089 | struct hid_report *report) |
1090 | { |
1091 | return 0; |
1092 | } |
1093 | static inline void picolcd_exit_lcd(struct picolcd_data *data) |
1094 | { |
1095 | } |
1096 | static inline int picolcd_resume_lcd(struct picolcd_data *data) |
1097 | { |
1098 | return 0; |
1099 | } |
1100 | #endif /* CONFIG_HID_PICOLCD_LCD */ |
1101 | |
1102 | #ifdef CONFIG_HID_PICOLCD_LEDS |
1103 | /** |
1104 | * LED class device |
1105 | */ |
1106 | static void picolcd_leds_set(struct picolcd_data *data) |
1107 | { |
1108 | struct hid_report *report; |
1109 | unsigned long flags; |
1110 | |
1111 | if (!data->led[0]) |
1112 | return; |
1113 | report = picolcd_out_report(REPORT_LED_STATE, data->hdev); |
1114 | if (!report || report->maxfield != 1 || report->field[0]->report_count != 1) |
1115 | return; |
1116 | |
1117 | spin_lock_irqsave(&data->lock, flags); |
1118 | hid_set_field(report->field[0], 0, data->led_state); |
1119 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
1120 | spin_unlock_irqrestore(&data->lock, flags); |
1121 | } |
1122 | |
1123 | static void picolcd_led_set_brightness(struct led_classdev *led_cdev, |
1124 | enum led_brightness value) |
1125 | { |
1126 | struct device *dev; |
1127 | struct hid_device *hdev; |
1128 | struct picolcd_data *data; |
1129 | int i, state = 0; |
1130 | |
1131 | dev = led_cdev->dev->parent; |
1132 | hdev = container_of(dev, struct hid_device, dev); |
1133 | data = hid_get_drvdata(hdev); |
1134 | for (i = 0; i < 8; i++) { |
1135 | if (led_cdev != data->led[i]) |
1136 | continue; |
1137 | state = (data->led_state >> i) & 1; |
1138 | if (value == LED_OFF && state) { |
1139 | data->led_state &= ~(1 << i); |
1140 | picolcd_leds_set(data); |
1141 | } else if (value != LED_OFF && !state) { |
1142 | data->led_state |= 1 << i; |
1143 | picolcd_leds_set(data); |
1144 | } |
1145 | break; |
1146 | } |
1147 | } |
1148 | |
1149 | static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev) |
1150 | { |
1151 | struct device *dev; |
1152 | struct hid_device *hdev; |
1153 | struct picolcd_data *data; |
1154 | int i, value = 0; |
1155 | |
1156 | dev = led_cdev->dev->parent; |
1157 | hdev = container_of(dev, struct hid_device, dev); |
1158 | data = hid_get_drvdata(hdev); |
1159 | for (i = 0; i < 8; i++) |
1160 | if (led_cdev == data->led[i]) { |
1161 | value = (data->led_state >> i) & 1; |
1162 | break; |
1163 | } |
1164 | return value ? LED_FULL : LED_OFF; |
1165 | } |
1166 | |
1167 | static int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report) |
1168 | { |
1169 | struct device *dev = &data->hdev->dev; |
1170 | struct led_classdev *led; |
1171 | size_t name_sz = strlen(dev_name(dev)) + 8; |
1172 | char *name; |
1173 | int i, ret = 0; |
1174 | |
1175 | if (!report) |
1176 | return -ENODEV; |
1177 | if (report->maxfield != 1 || report->field[0]->report_count != 1 || |
1178 | report->field[0]->report_size != 8) { |
1179 | dev_err(dev, "unsupported LED_STATE report"); |
1180 | return -EINVAL; |
1181 | } |
1182 | |
1183 | for (i = 0; i < 8; i++) { |
1184 | led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL); |
1185 | if (!led) { |
1186 | dev_err(dev, "can't allocate memory for LED %d\n", i); |
1187 | ret = -ENOMEM; |
1188 | goto err; |
1189 | } |
1190 | name = (void *)(&led[1]); |
1191 | snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i); |
1192 | led->name = name; |
1193 | led->brightness = 0; |
1194 | led->max_brightness = 1; |
1195 | led->brightness_get = picolcd_led_get_brightness; |
1196 | led->brightness_set = picolcd_led_set_brightness; |
1197 | |
1198 | data->led[i] = led; |
1199 | ret = led_classdev_register(dev, data->led[i]); |
1200 | if (ret) { |
1201 | data->led[i] = NULL; |
1202 | kfree(led); |
1203 | dev_err(dev, "can't register LED %d\n", i); |
1204 | goto err; |
1205 | } |
1206 | } |
1207 | return 0; |
1208 | err: |
1209 | for (i = 0; i < 8; i++) |
1210 | if (data->led[i]) { |
1211 | led = data->led[i]; |
1212 | data->led[i] = NULL; |
1213 | led_classdev_unregister(led); |
1214 | kfree(led); |
1215 | } |
1216 | return ret; |
1217 | } |
1218 | |
1219 | static void picolcd_exit_leds(struct picolcd_data *data) |
1220 | { |
1221 | struct led_classdev *led; |
1222 | int i; |
1223 | |
1224 | for (i = 0; i < 8; i++) { |
1225 | led = data->led[i]; |
1226 | data->led[i] = NULL; |
1227 | if (!led) |
1228 | continue; |
1229 | led_classdev_unregister(led); |
1230 | kfree(led); |
1231 | } |
1232 | } |
1233 | |
1234 | #else |
1235 | static inline int picolcd_init_leds(struct picolcd_data *data, |
1236 | struct hid_report *report) |
1237 | { |
1238 | return 0; |
1239 | } |
1240 | static inline void picolcd_exit_leds(struct picolcd_data *data) |
1241 | { |
1242 | } |
1243 | static inline int picolcd_leds_set(struct picolcd_data *data) |
1244 | { |
1245 | return 0; |
1246 | } |
1247 | #endif /* CONFIG_HID_PICOLCD_LEDS */ |
1248 | |
1249 | /* |
1250 | * input class device |
1251 | */ |
1252 | static int picolcd_raw_keypad(struct picolcd_data *data, |
1253 | struct hid_report *report, u8 *raw_data, int size) |
1254 | { |
1255 | /* |
1256 | * Keypad event |
1257 | * First and second data bytes list currently pressed keys, |
1258 | * 0x00 means no key and at most 2 keys may be pressed at same time |
1259 | */ |
1260 | int i, j; |
1261 | |
1262 | /* determine newly pressed keys */ |
1263 | for (i = 0; i < size; i++) { |
1264 | unsigned int key_code; |
1265 | if (raw_data[i] == 0) |
1266 | continue; |
1267 | for (j = 0; j < sizeof(data->pressed_keys); j++) |
1268 | if (data->pressed_keys[j] == raw_data[i]) |
1269 | goto key_already_down; |
1270 | for (j = 0; j < sizeof(data->pressed_keys); j++) |
1271 | if (data->pressed_keys[j] == 0) { |
1272 | data->pressed_keys[j] = raw_data[i]; |
1273 | break; |
1274 | } |
1275 | input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]); |
1276 | if (raw_data[i] < PICOLCD_KEYS) |
1277 | key_code = data->keycode[raw_data[i]]; |
1278 | else |
1279 | key_code = KEY_UNKNOWN; |
1280 | if (key_code != KEY_UNKNOWN) { |
1281 | dbg_hid(PICOLCD_NAME " got key press for %u:%d", |
1282 | raw_data[i], key_code); |
1283 | input_report_key(data->input_keys, key_code, 1); |
1284 | } |
1285 | input_sync(data->input_keys); |
1286 | key_already_down: |
1287 | continue; |
1288 | } |
1289 | |
1290 | /* determine newly released keys */ |
1291 | for (j = 0; j < sizeof(data->pressed_keys); j++) { |
1292 | unsigned int key_code; |
1293 | if (data->pressed_keys[j] == 0) |
1294 | continue; |
1295 | for (i = 0; i < size; i++) |
1296 | if (data->pressed_keys[j] == raw_data[i]) |
1297 | goto key_still_down; |
1298 | input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]); |
1299 | if (data->pressed_keys[j] < PICOLCD_KEYS) |
1300 | key_code = data->keycode[data->pressed_keys[j]]; |
1301 | else |
1302 | key_code = KEY_UNKNOWN; |
1303 | if (key_code != KEY_UNKNOWN) { |
1304 | dbg_hid(PICOLCD_NAME " got key release for %u:%d", |
1305 | data->pressed_keys[j], key_code); |
1306 | input_report_key(data->input_keys, key_code, 0); |
1307 | } |
1308 | input_sync(data->input_keys); |
1309 | data->pressed_keys[j] = 0; |
1310 | key_still_down: |
1311 | continue; |
1312 | } |
1313 | return 1; |
1314 | } |
1315 | |
1316 | static int picolcd_raw_cir(struct picolcd_data *data, |
1317 | struct hid_report *report, u8 *raw_data, int size) |
1318 | { |
1319 | /* Need understanding of CIR data format to implement ... */ |
1320 | return 1; |
1321 | } |
1322 | |
1323 | static int picolcd_check_version(struct hid_device *hdev) |
1324 | { |
1325 | struct picolcd_data *data = hid_get_drvdata(hdev); |
1326 | struct picolcd_pending *verinfo; |
1327 | int ret = 0; |
1328 | |
1329 | if (!data) |
1330 | return -ENODEV; |
1331 | |
1332 | verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0); |
1333 | if (!verinfo) { |
1334 | hid_err(hdev, "no version response from PicoLCD\n"); |
1335 | return -ENODEV; |
1336 | } |
1337 | |
1338 | if (verinfo->raw_size == 2) { |
1339 | data->version[0] = verinfo->raw_data[1]; |
1340 | data->version[1] = verinfo->raw_data[0]; |
1341 | if (data->status & PICOLCD_BOOTLOADER) { |
1342 | hid_info(hdev, "PicoLCD, bootloader version %d.%d\n", |
1343 | verinfo->raw_data[1], verinfo->raw_data[0]); |
1344 | } else { |
1345 | hid_info(hdev, "PicoLCD, firmware version %d.%d\n", |
1346 | verinfo->raw_data[1], verinfo->raw_data[0]); |
1347 | } |
1348 | } else { |
1349 | hid_err(hdev, "confused, got unexpected version response from PicoLCD\n"); |
1350 | ret = -EINVAL; |
1351 | } |
1352 | kfree(verinfo); |
1353 | return ret; |
1354 | } |
1355 | |
1356 | /* |
1357 | * Reset our device and wait for answer to VERSION request |
1358 | */ |
1359 | static int picolcd_reset(struct hid_device *hdev) |
1360 | { |
1361 | struct picolcd_data *data = hid_get_drvdata(hdev); |
1362 | struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev); |
1363 | unsigned long flags; |
1364 | int error; |
1365 | |
1366 | if (!data || !report || report->maxfield != 1) |
1367 | return -ENODEV; |
1368 | |
1369 | spin_lock_irqsave(&data->lock, flags); |
1370 | if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER) |
1371 | data->status |= PICOLCD_BOOTLOADER; |
1372 | |
1373 | /* perform the reset */ |
1374 | hid_set_field(report->field[0], 0, 1); |
1375 | usbhid_submit_report(hdev, report, USB_DIR_OUT); |
1376 | spin_unlock_irqrestore(&data->lock, flags); |
1377 | |
1378 | error = picolcd_check_version(hdev); |
1379 | if (error) |
1380 | return error; |
1381 | |
1382 | picolcd_resume_lcd(data); |
1383 | picolcd_resume_backlight(data); |
1384 | #ifdef CONFIG_HID_PICOLCD_FB |
1385 | if (data->fb_info) |
1386 | schedule_delayed_work(&data->fb_info->deferred_work, 0); |
1387 | #endif /* CONFIG_HID_PICOLCD_FB */ |
1388 | |
1389 | picolcd_leds_set(data); |
1390 | return 0; |
1391 | } |
1392 | |
1393 | /* |
1394 | * The "operation_mode" sysfs attribute |
1395 | */ |
1396 | static ssize_t picolcd_operation_mode_show(struct device *dev, |
1397 | struct device_attribute *attr, char *buf) |
1398 | { |
1399 | struct picolcd_data *data = dev_get_drvdata(dev); |
1400 | |
1401 | if (data->status & PICOLCD_BOOTLOADER) |
1402 | return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n"); |
1403 | else |
1404 | return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n"); |
1405 | } |
1406 | |
1407 | static ssize_t picolcd_operation_mode_store(struct device *dev, |
1408 | struct device_attribute *attr, const char *buf, size_t count) |
1409 | { |
1410 | struct picolcd_data *data = dev_get_drvdata(dev); |
1411 | struct hid_report *report = NULL; |
1412 | size_t cnt = count; |
1413 | int timeout = data->opmode_delay; |
1414 | unsigned long flags; |
1415 | |
1416 | if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) { |
1417 | if (data->status & PICOLCD_BOOTLOADER) |
1418 | report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev); |
1419 | buf += 3; |
1420 | cnt -= 3; |
1421 | } else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) { |
1422 | if (!(data->status & PICOLCD_BOOTLOADER)) |
1423 | report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev); |
1424 | buf += 10; |
1425 | cnt -= 10; |
1426 | } |
1427 | if (!report) |
1428 | return -EINVAL; |
1429 | |
1430 | while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r')) |
1431 | cnt--; |
1432 | if (cnt != 0) |
1433 | return -EINVAL; |
1434 | |
1435 | spin_lock_irqsave(&data->lock, flags); |
1436 | hid_set_field(report->field[0], 0, timeout & 0xff); |
1437 | hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff); |
1438 | usbhid_submit_report(data->hdev, report, USB_DIR_OUT); |
1439 | spin_unlock_irqrestore(&data->lock, flags); |
1440 | return count; |
1441 | } |
1442 | |
1443 | static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show, |
1444 | picolcd_operation_mode_store); |
1445 | |
1446 | /* |
1447 | * The "operation_mode_delay" sysfs attribute |
1448 | */ |
1449 | static ssize_t picolcd_operation_mode_delay_show(struct device *dev, |
1450 | struct device_attribute *attr, char *buf) |
1451 | { |
1452 | struct picolcd_data *data = dev_get_drvdata(dev); |
1453 | |
1454 | return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay); |
1455 | } |
1456 | |
1457 | static ssize_t picolcd_operation_mode_delay_store(struct device *dev, |
1458 | struct device_attribute *attr, const char *buf, size_t count) |
1459 | { |
1460 | struct picolcd_data *data = dev_get_drvdata(dev); |
1461 | unsigned u; |
1462 | if (sscanf(buf, "%u", &u) != 1) |
1463 | return -EINVAL; |
1464 | if (u > 30000) |
1465 | return -EINVAL; |
1466 | else |
1467 | data->opmode_delay = u; |
1468 | return count; |
1469 | } |
1470 | |
1471 | static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show, |
1472 | picolcd_operation_mode_delay_store); |
1473 | |
1474 | |
1475 | #ifdef CONFIG_DEBUG_FS |
1476 | /* |
1477 | * The "reset" file |
1478 | */ |
1479 | static int picolcd_debug_reset_show(struct seq_file *f, void *p) |
1480 | { |
1481 | if (picolcd_fbinfo((struct picolcd_data *)f->private)) |
1482 | seq_printf(f, "all fb\n"); |
1483 | else |
1484 | seq_printf(f, "all\n"); |
1485 | return 0; |
1486 | } |
1487 | |
1488 | static int picolcd_debug_reset_open(struct inode *inode, struct file *f) |
1489 | { |
1490 | return single_open(f, picolcd_debug_reset_show, inode->i_private); |
1491 | } |
1492 | |
1493 | static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf, |
1494 | size_t count, loff_t *ppos) |
1495 | { |
1496 | struct picolcd_data *data = ((struct seq_file *)f->private_data)->private; |
1497 | char buf[32]; |
1498 | size_t cnt = min(count, sizeof(buf)-1); |
1499 | if (copy_from_user(buf, user_buf, cnt)) |
1500 | return -EFAULT; |
1501 | |
1502 | while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n')) |
1503 | cnt--; |
1504 | buf[cnt] = '\0'; |
1505 | if (strcmp(buf, "all") == 0) { |
1506 | picolcd_reset(data->hdev); |
1507 | picolcd_fb_reset(data, 1); |
1508 | } else if (strcmp(buf, "fb") == 0) { |
1509 | picolcd_fb_reset(data, 1); |
1510 | } else { |
1511 | return -EINVAL; |
1512 | } |
1513 | return count; |
1514 | } |
1515 | |
1516 | static const struct file_operations picolcd_debug_reset_fops = { |
1517 | .owner = THIS_MODULE, |
1518 | .open = picolcd_debug_reset_open, |
1519 | .read = seq_read, |
1520 | .llseek = seq_lseek, |
1521 | .write = picolcd_debug_reset_write, |
1522 | .release = single_release, |
1523 | }; |
1524 | |
1525 | /* |
1526 | * The "eeprom" file |
1527 | */ |
1528 | static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u, |
1529 | size_t s, loff_t *off) |
1530 | { |
1531 | struct picolcd_data *data = f->private_data; |
1532 | struct picolcd_pending *resp; |
1533 | u8 raw_data[3]; |
1534 | ssize_t ret = -EIO; |
1535 | |
1536 | if (s == 0) |
1537 | return -EINVAL; |
1538 | if (*off > 0x0ff) |
1539 | return 0; |
1540 | |
1541 | /* prepare buffer with info about what we want to read (addr & len) */ |
1542 | raw_data[0] = *off & 0xff; |
1543 | raw_data[1] = (*off >> 8) & 0xff; |
1544 | raw_data[2] = s < 20 ? s : 20; |
1545 | if (*off + raw_data[2] > 0xff) |
1546 | raw_data[2] = 0x100 - *off; |
1547 | resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data, |
1548 | sizeof(raw_data)); |
1549 | if (!resp) |
1550 | return -EIO; |
1551 | |
1552 | if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { |
1553 | /* successful read :) */ |
1554 | ret = resp->raw_data[2]; |
1555 | if (ret > s) |
1556 | ret = s; |
1557 | if (copy_to_user(u, resp->raw_data+3, ret)) |
1558 | ret = -EFAULT; |
1559 | else |
1560 | *off += ret; |
1561 | } /* anything else is some kind of IO error */ |
1562 | |
1563 | kfree(resp); |
1564 | return ret; |
1565 | } |
1566 | |
1567 | static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u, |
1568 | size_t s, loff_t *off) |
1569 | { |
1570 | struct picolcd_data *data = f->private_data; |
1571 | struct picolcd_pending *resp; |
1572 | ssize_t ret = -EIO; |
1573 | u8 raw_data[23]; |
1574 | |
1575 | if (s == 0) |
1576 | return -EINVAL; |
1577 | if (*off > 0x0ff) |
1578 | return -ENOSPC; |
1579 | |
1580 | memset(raw_data, 0, sizeof(raw_data)); |
1581 | raw_data[0] = *off & 0xff; |
1582 | raw_data[1] = (*off >> 8) & 0xff; |
1583 | raw_data[2] = min((size_t)20, s); |
1584 | if (*off + raw_data[2] > 0xff) |
1585 | raw_data[2] = 0x100 - *off; |
1586 | |
1587 | if (copy_from_user(raw_data+3, u, min((u8)20, raw_data[2]))) |
1588 | return -EFAULT; |
1589 | resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data, |
1590 | sizeof(raw_data)); |
1591 | |
1592 | if (!resp) |
1593 | return -EIO; |
1594 | |
1595 | if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) { |
1596 | /* check if written data matches */ |
1597 | if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) { |
1598 | *off += raw_data[2]; |
1599 | ret = raw_data[2]; |
1600 | } |
1601 | } |
1602 | kfree(resp); |
1603 | return ret; |
1604 | } |
1605 | |
1606 | /* |
1607 | * Notes: |
1608 | * - read/write happens in chunks of at most 20 bytes, it's up to userspace |
1609 | * to loop in order to get more data. |
1610 | * - on write errors on otherwise correct write request the bytes |
1611 | * that should have been written are in undefined state. |
1612 | */ |
1613 | static const struct file_operations picolcd_debug_eeprom_fops = { |
1614 | .owner = THIS_MODULE, |
1615 | .open = simple_open, |
1616 | .read = picolcd_debug_eeprom_read, |
1617 | .write = picolcd_debug_eeprom_write, |
1618 | .llseek = generic_file_llseek, |
1619 | }; |
1620 | |
1621 | /* |
1622 | * The "flash" file |
1623 | */ |
1624 | /* record a flash address to buf (bounds check to be done by caller) */ |
1625 | static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off) |
1626 | { |
1627 | buf[0] = off & 0xff; |
1628 | buf[1] = (off >> 8) & 0xff; |
1629 | if (data->addr_sz == 3) |
1630 | buf[2] = (off >> 16) & 0xff; |
1631 | return data->addr_sz == 2 ? 2 : 3; |
1632 | } |
1633 | |
1634 | /* read a given size of data (bounds check to be done by caller) */ |
1635 | static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id, |
1636 | char __user *u, size_t s, loff_t *off) |
1637 | { |
1638 | struct picolcd_pending *resp; |
1639 | u8 raw_data[4]; |
1640 | ssize_t ret = 0; |
1641 | int len_off, err = -EIO; |
1642 | |
1643 | while (s > 0) { |
1644 | err = -EIO; |
1645 | len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
1646 | raw_data[len_off] = s > 32 ? 32 : s; |
1647 | resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1); |
1648 | if (!resp || !resp->in_report) |
1649 | goto skip; |
1650 | if (resp->in_report->id == REPORT_MEMORY || |
1651 | resp->in_report->id == REPORT_BL_READ_MEMORY) { |
1652 | if (memcmp(raw_data, resp->raw_data, len_off+1) != 0) |
1653 | goto skip; |
1654 | if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) { |
1655 | err = -EFAULT; |
1656 | goto skip; |
1657 | } |
1658 | *off += raw_data[len_off]; |
1659 | s -= raw_data[len_off]; |
1660 | ret += raw_data[len_off]; |
1661 | err = 0; |
1662 | } |
1663 | skip: |
1664 | kfree(resp); |
1665 | if (err) |
1666 | return ret > 0 ? ret : err; |
1667 | } |
1668 | return ret; |
1669 | } |
1670 | |
1671 | static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u, |
1672 | size_t s, loff_t *off) |
1673 | { |
1674 | struct picolcd_data *data = f->private_data; |
1675 | |
1676 | if (s == 0) |
1677 | return -EINVAL; |
1678 | if (*off > 0x05fff) |
1679 | return 0; |
1680 | if (*off + s > 0x05fff) |
1681 | s = 0x06000 - *off; |
1682 | |
1683 | if (data->status & PICOLCD_BOOTLOADER) |
1684 | return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off); |
1685 | else |
1686 | return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off); |
1687 | } |
1688 | |
1689 | /* erase block aligned to 64bytes boundary */ |
1690 | static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id, |
1691 | loff_t *off) |
1692 | { |
1693 | struct picolcd_pending *resp; |
1694 | u8 raw_data[3]; |
1695 | int len_off; |
1696 | ssize_t ret = -EIO; |
1697 | |
1698 | if (*off & 0x3f) |
1699 | return -EINVAL; |
1700 | |
1701 | len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
1702 | resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off); |
1703 | if (!resp || !resp->in_report) |
1704 | goto skip; |
1705 | if (resp->in_report->id == REPORT_MEMORY || |
1706 | resp->in_report->id == REPORT_BL_ERASE_MEMORY) { |
1707 | if (memcmp(raw_data, resp->raw_data, len_off) != 0) |
1708 | goto skip; |
1709 | ret = 0; |
1710 | } |
1711 | skip: |
1712 | kfree(resp); |
1713 | return ret; |
1714 | } |
1715 | |
1716 | /* write a given size of data (bounds check to be done by caller) */ |
1717 | static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id, |
1718 | const char __user *u, size_t s, loff_t *off) |
1719 | { |
1720 | struct picolcd_pending *resp; |
1721 | u8 raw_data[36]; |
1722 | ssize_t ret = 0; |
1723 | int len_off, err = -EIO; |
1724 | |
1725 | while (s > 0) { |
1726 | err = -EIO; |
1727 | len_off = _picolcd_flash_setaddr(data, raw_data, *off); |
1728 | raw_data[len_off] = s > 32 ? 32 : s; |
1729 | if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) { |
1730 | err = -EFAULT; |
1731 | break; |
1732 | } |
1733 | resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, |
1734 | len_off+1+raw_data[len_off]); |
1735 | if (!resp || !resp->in_report) |
1736 | goto skip; |
1737 | if (resp->in_report->id == REPORT_MEMORY || |
1738 | resp->in_report->id == REPORT_BL_WRITE_MEMORY) { |
1739 | if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0) |
1740 | goto skip; |
1741 | *off += raw_data[len_off]; |
1742 | s -= raw_data[len_off]; |
1743 | ret += raw_data[len_off]; |
1744 | err = 0; |
1745 | } |
1746 | skip: |
1747 | kfree(resp); |
1748 | if (err) |
1749 | break; |
1750 | } |
1751 | return ret > 0 ? ret : err; |
1752 | } |
1753 | |
1754 | static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u, |
1755 | size_t s, loff_t *off) |
1756 | { |
1757 | struct picolcd_data *data = f->private_data; |
1758 | ssize_t err, ret = 0; |
1759 | int report_erase, report_write; |
1760 | |
1761 | if (s == 0) |
1762 | return -EINVAL; |
1763 | if (*off > 0x5fff) |
1764 | return -ENOSPC; |
1765 | if (s & 0x3f) |
1766 | return -EINVAL; |
1767 | if (*off & 0x3f) |
1768 | return -EINVAL; |
1769 | |
1770 | if (data->status & PICOLCD_BOOTLOADER) { |
1771 | report_erase = REPORT_BL_ERASE_MEMORY; |
1772 | report_write = REPORT_BL_WRITE_MEMORY; |
1773 | } else { |
1774 | report_erase = REPORT_ERASE_MEMORY; |
1775 | report_write = REPORT_WRITE_MEMORY; |
1776 | } |
1777 | mutex_lock(&data->mutex_flash); |
1778 | while (s > 0) { |
1779 | err = _picolcd_flash_erase64(data, report_erase, off); |
1780 | if (err) |
1781 | break; |
1782 | err = _picolcd_flash_write(data, report_write, u, 64, off); |
1783 | if (err < 0) |
1784 | break; |
1785 | ret += err; |
1786 | *off += err; |
1787 | s -= err; |
1788 | if (err != 64) |
1789 | break; |
1790 | } |
1791 | mutex_unlock(&data->mutex_flash); |
1792 | return ret > 0 ? ret : err; |
1793 | } |
1794 | |
1795 | /* |
1796 | * Notes: |
1797 | * - concurrent writing is prevented by mutex and all writes must be |
1798 | * n*64 bytes and 64-byte aligned, each write being preceded by an |
1799 | * ERASE which erases a 64byte block. |
1800 | * If less than requested was written or an error is returned for an |
1801 | * otherwise correct write request the next 64-byte block which should |
1802 | * have been written is in undefined state (mostly: original, erased, |
1803 | * (half-)written with write error) |
1804 | * - reading can happen without special restriction |
1805 | */ |
1806 | static const struct file_operations picolcd_debug_flash_fops = { |
1807 | .owner = THIS_MODULE, |
1808 | .open = simple_open, |
1809 | .read = picolcd_debug_flash_read, |
1810 | .write = picolcd_debug_flash_write, |
1811 | .llseek = generic_file_llseek, |
1812 | }; |
1813 | |
1814 | |
1815 | /* |
1816 | * Helper code for HID report level dumping/debugging |
1817 | */ |
1818 | static const char *error_codes[] = { |
1819 | "success", "parameter missing", "data_missing", "block readonly", |
1820 | "block not erasable", "block too big", "section overflow", |
1821 | "invalid command length", "invalid data length", |
1822 | }; |
1823 | |
1824 | static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data, |
1825 | const size_t data_len) |
1826 | { |
1827 | int i, j; |
1828 | for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) { |
1829 | dst[j++] = hex_asc[(data[i] >> 4) & 0x0f]; |
1830 | dst[j++] = hex_asc[data[i] & 0x0f]; |
1831 | dst[j++] = ' '; |
1832 | } |
1833 | if (j < dst_sz) { |
1834 | dst[j--] = '\0'; |
1835 | dst[j] = '\n'; |
1836 | } else |
1837 | dst[j] = '\0'; |
1838 | } |
1839 | |
1840 | static void picolcd_debug_out_report(struct picolcd_data *data, |
1841 | struct hid_device *hdev, struct hid_report *report) |
1842 | { |
1843 | u8 raw_data[70]; |
1844 | int raw_size = (report->size >> 3) + 1; |
1845 | char *buff; |
1846 | #define BUFF_SZ 256 |
1847 | |
1848 | /* Avoid unnecessary overhead if debugfs is disabled */ |
1849 | if (list_empty(&hdev->debug_list)) |
1850 | return; |
1851 | |
1852 | buff = kmalloc(BUFF_SZ, GFP_ATOMIC); |
1853 | if (!buff) |
1854 | return; |
1855 | |
1856 | snprintf(buff, BUFF_SZ, "\nout report %d (size %d) = ", |
1857 | report->id, raw_size); |
1858 | hid_debug_event(hdev, buff); |
1859 | if (raw_size + 5 > sizeof(raw_data)) { |
1860 | kfree(buff); |
1861 | hid_debug_event(hdev, " TOO BIG\n"); |
1862 | return; |
1863 | } else { |
1864 | raw_data[0] = report->id; |
1865 | hid_output_report(report, raw_data); |
1866 | dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size); |
1867 | hid_debug_event(hdev, buff); |
1868 | } |
1869 | |
1870 | switch (report->id) { |
1871 | case REPORT_LED_STATE: |
1872 | /* 1 data byte with GPO state */ |
1873 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1874 | "REPORT_LED_STATE", report->id, raw_size-1); |
1875 | hid_debug_event(hdev, buff); |
1876 | snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]); |
1877 | hid_debug_event(hdev, buff); |
1878 | break; |
1879 | case REPORT_BRIGHTNESS: |
1880 | /* 1 data byte with brightness */ |
1881 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1882 | "REPORT_BRIGHTNESS", report->id, raw_size-1); |
1883 | hid_debug_event(hdev, buff); |
1884 | snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]); |
1885 | hid_debug_event(hdev, buff); |
1886 | break; |
1887 | case REPORT_CONTRAST: |
1888 | /* 1 data byte with contrast */ |
1889 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1890 | "REPORT_CONTRAST", report->id, raw_size-1); |
1891 | hid_debug_event(hdev, buff); |
1892 | snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]); |
1893 | hid_debug_event(hdev, buff); |
1894 | break; |
1895 | case REPORT_RESET: |
1896 | /* 2 data bytes with reset duration in ms */ |
1897 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1898 | "REPORT_RESET", report->id, raw_size-1); |
1899 | hid_debug_event(hdev, buff); |
1900 | snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n", |
1901 | raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]); |
1902 | hid_debug_event(hdev, buff); |
1903 | break; |
1904 | case REPORT_LCD_CMD: |
1905 | /* 63 data bytes with LCD commands */ |
1906 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1907 | "REPORT_LCD_CMD", report->id, raw_size-1); |
1908 | hid_debug_event(hdev, buff); |
1909 | /* TODO: format decoding */ |
1910 | break; |
1911 | case REPORT_LCD_DATA: |
1912 | /* 63 data bytes with LCD data */ |
1913 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1914 | "REPORT_LCD_CMD", report->id, raw_size-1); |
1915 | /* TODO: format decoding */ |
1916 | hid_debug_event(hdev, buff); |
1917 | break; |
1918 | case REPORT_LCD_CMD_DATA: |
1919 | /* 63 data bytes with LCD commands and data */ |
1920 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1921 | "REPORT_LCD_CMD", report->id, raw_size-1); |
1922 | /* TODO: format decoding */ |
1923 | hid_debug_event(hdev, buff); |
1924 | break; |
1925 | case REPORT_EE_READ: |
1926 | /* 3 data bytes with read area description */ |
1927 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1928 | "REPORT_EE_READ", report->id, raw_size-1); |
1929 | hid_debug_event(hdev, buff); |
1930 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
1931 | raw_data[2], raw_data[1]); |
1932 | hid_debug_event(hdev, buff); |
1933 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
1934 | hid_debug_event(hdev, buff); |
1935 | break; |
1936 | case REPORT_EE_WRITE: |
1937 | /* 3+1..20 data bytes with write area description */ |
1938 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1939 | "REPORT_EE_WRITE", report->id, raw_size-1); |
1940 | hid_debug_event(hdev, buff); |
1941 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
1942 | raw_data[2], raw_data[1]); |
1943 | hid_debug_event(hdev, buff); |
1944 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
1945 | hid_debug_event(hdev, buff); |
1946 | if (raw_data[3] == 0) { |
1947 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
1948 | } else if (raw_data[3] + 4 <= raw_size) { |
1949 | snprintf(buff, BUFF_SZ, "\tData: "); |
1950 | hid_debug_event(hdev, buff); |
1951 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
1952 | } else { |
1953 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
1954 | } |
1955 | hid_debug_event(hdev, buff); |
1956 | break; |
1957 | case REPORT_ERASE_MEMORY: |
1958 | case REPORT_BL_ERASE_MEMORY: |
1959 | /* 3 data bytes with pointer inside erase block */ |
1960 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1961 | "REPORT_ERASE_MEMORY", report->id, raw_size-1); |
1962 | hid_debug_event(hdev, buff); |
1963 | switch (data->addr_sz) { |
1964 | case 2: |
1965 | snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n", |
1966 | raw_data[2], raw_data[1]); |
1967 | break; |
1968 | case 3: |
1969 | snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n", |
1970 | raw_data[3], raw_data[2], raw_data[1]); |
1971 | break; |
1972 | default: |
1973 | snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
1974 | } |
1975 | hid_debug_event(hdev, buff); |
1976 | break; |
1977 | case REPORT_READ_MEMORY: |
1978 | case REPORT_BL_READ_MEMORY: |
1979 | /* 4 data bytes with read area description */ |
1980 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
1981 | "REPORT_READ_MEMORY", report->id, raw_size-1); |
1982 | hid_debug_event(hdev, buff); |
1983 | switch (data->addr_sz) { |
1984 | case 2: |
1985 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
1986 | raw_data[2], raw_data[1]); |
1987 | hid_debug_event(hdev, buff); |
1988 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
1989 | break; |
1990 | case 3: |
1991 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
1992 | raw_data[3], raw_data[2], raw_data[1]); |
1993 | hid_debug_event(hdev, buff); |
1994 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
1995 | break; |
1996 | default: |
1997 | snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
1998 | } |
1999 | hid_debug_event(hdev, buff); |
2000 | break; |
2001 | case REPORT_WRITE_MEMORY: |
2002 | case REPORT_BL_WRITE_MEMORY: |
2003 | /* 4+1..32 data bytes with write adrea description */ |
2004 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2005 | "REPORT_WRITE_MEMORY", report->id, raw_size-1); |
2006 | hid_debug_event(hdev, buff); |
2007 | switch (data->addr_sz) { |
2008 | case 2: |
2009 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
2010 | raw_data[2], raw_data[1]); |
2011 | hid_debug_event(hdev, buff); |
2012 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
2013 | hid_debug_event(hdev, buff); |
2014 | if (raw_data[3] == 0) { |
2015 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
2016 | } else if (raw_data[3] + 4 <= raw_size) { |
2017 | snprintf(buff, BUFF_SZ, "\tData: "); |
2018 | hid_debug_event(hdev, buff); |
2019 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
2020 | } else { |
2021 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
2022 | } |
2023 | break; |
2024 | case 3: |
2025 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
2026 | raw_data[3], raw_data[2], raw_data[1]); |
2027 | hid_debug_event(hdev, buff); |
2028 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
2029 | hid_debug_event(hdev, buff); |
2030 | if (raw_data[4] == 0) { |
2031 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
2032 | } else if (raw_data[4] + 5 <= raw_size) { |
2033 | snprintf(buff, BUFF_SZ, "\tData: "); |
2034 | hid_debug_event(hdev, buff); |
2035 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); |
2036 | } else { |
2037 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
2038 | } |
2039 | break; |
2040 | default: |
2041 | snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
2042 | } |
2043 | hid_debug_event(hdev, buff); |
2044 | break; |
2045 | case REPORT_SPLASH_RESTART: |
2046 | /* TODO */ |
2047 | break; |
2048 | case REPORT_EXIT_KEYBOARD: |
2049 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2050 | "REPORT_EXIT_KEYBOARD", report->id, raw_size-1); |
2051 | hid_debug_event(hdev, buff); |
2052 | snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", |
2053 | raw_data[1] | (raw_data[2] << 8), |
2054 | raw_data[2], raw_data[1]); |
2055 | hid_debug_event(hdev, buff); |
2056 | break; |
2057 | case REPORT_VERSION: |
2058 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2059 | "REPORT_VERSION", report->id, raw_size-1); |
2060 | hid_debug_event(hdev, buff); |
2061 | break; |
2062 | case REPORT_DEVID: |
2063 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2064 | "REPORT_DEVID", report->id, raw_size-1); |
2065 | hid_debug_event(hdev, buff); |
2066 | break; |
2067 | case REPORT_SPLASH_SIZE: |
2068 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2069 | "REPORT_SPLASH_SIZE", report->id, raw_size-1); |
2070 | hid_debug_event(hdev, buff); |
2071 | break; |
2072 | case REPORT_HOOK_VERSION: |
2073 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2074 | "REPORT_HOOK_VERSION", report->id, raw_size-1); |
2075 | hid_debug_event(hdev, buff); |
2076 | break; |
2077 | case REPORT_EXIT_FLASHER: |
2078 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2079 | "REPORT_VERSION", report->id, raw_size-1); |
2080 | hid_debug_event(hdev, buff); |
2081 | snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n", |
2082 | raw_data[1] | (raw_data[2] << 8), |
2083 | raw_data[2], raw_data[1]); |
2084 | hid_debug_event(hdev, buff); |
2085 | break; |
2086 | default: |
2087 | snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n", |
2088 | "<unknown>", report->id, raw_size-1); |
2089 | hid_debug_event(hdev, buff); |
2090 | break; |
2091 | } |
2092 | wake_up_interruptible(&hdev->debug_wait); |
2093 | kfree(buff); |
2094 | } |
2095 | |
2096 | static void picolcd_debug_raw_event(struct picolcd_data *data, |
2097 | struct hid_device *hdev, struct hid_report *report, |
2098 | u8 *raw_data, int size) |
2099 | { |
2100 | char *buff; |
2101 | |
2102 | #define BUFF_SZ 256 |
2103 | /* Avoid unnecessary overhead if debugfs is disabled */ |
2104 | if (!hdev->debug_events) |
2105 | return; |
2106 | |
2107 | buff = kmalloc(BUFF_SZ, GFP_ATOMIC); |
2108 | if (!buff) |
2109 | return; |
2110 | |
2111 | switch (report->id) { |
2112 | case REPORT_ERROR_CODE: |
2113 | /* 2 data bytes with affected report and error code */ |
2114 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2115 | "REPORT_ERROR_CODE", report->id, size-1); |
2116 | hid_debug_event(hdev, buff); |
2117 | if (raw_data[2] < ARRAY_SIZE(error_codes)) |
2118 | snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n", |
2119 | raw_data[2], error_codes[raw_data[2]], raw_data[1]); |
2120 | else |
2121 | snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n", |
2122 | raw_data[2], raw_data[1]); |
2123 | hid_debug_event(hdev, buff); |
2124 | break; |
2125 | case REPORT_KEY_STATE: |
2126 | /* 2 data bytes with key state */ |
2127 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2128 | "REPORT_KEY_STATE", report->id, size-1); |
2129 | hid_debug_event(hdev, buff); |
2130 | if (raw_data[1] == 0) |
2131 | snprintf(buff, BUFF_SZ, "\tNo key pressed\n"); |
2132 | else if (raw_data[2] == 0) |
2133 | snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n", |
2134 | raw_data[1], raw_data[1]); |
2135 | else |
2136 | snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n", |
2137 | raw_data[1], raw_data[1], raw_data[2], raw_data[2]); |
2138 | hid_debug_event(hdev, buff); |
2139 | break; |
2140 | case REPORT_IR_DATA: |
2141 | /* Up to 20 byes of IR scancode data */ |
2142 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2143 | "REPORT_IR_DATA", report->id, size-1); |
2144 | hid_debug_event(hdev, buff); |
2145 | if (raw_data[1] == 0) { |
2146 | snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n"); |
2147 | hid_debug_event(hdev, buff); |
2148 | } else if (raw_data[1] + 1 <= size) { |
2149 | snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ", |
2150 | raw_data[1]-1); |
2151 | hid_debug_event(hdev, buff); |
2152 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1); |
2153 | hid_debug_event(hdev, buff); |
2154 | } else { |
2155 | snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n", |
2156 | raw_data[1]-1); |
2157 | hid_debug_event(hdev, buff); |
2158 | } |
2159 | break; |
2160 | case REPORT_EE_DATA: |
2161 | /* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */ |
2162 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2163 | "REPORT_EE_DATA", report->id, size-1); |
2164 | hid_debug_event(hdev, buff); |
2165 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
2166 | raw_data[2], raw_data[1]); |
2167 | hid_debug_event(hdev, buff); |
2168 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
2169 | hid_debug_event(hdev, buff); |
2170 | if (raw_data[3] == 0) { |
2171 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
2172 | hid_debug_event(hdev, buff); |
2173 | } else if (raw_data[3] + 4 <= size) { |
2174 | snprintf(buff, BUFF_SZ, "\tData: "); |
2175 | hid_debug_event(hdev, buff); |
2176 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
2177 | hid_debug_event(hdev, buff); |
2178 | } else { |
2179 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
2180 | hid_debug_event(hdev, buff); |
2181 | } |
2182 | break; |
2183 | case REPORT_MEMORY: |
2184 | /* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */ |
2185 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2186 | "REPORT_MEMORY", report->id, size-1); |
2187 | hid_debug_event(hdev, buff); |
2188 | switch (data->addr_sz) { |
2189 | case 2: |
2190 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n", |
2191 | raw_data[2], raw_data[1]); |
2192 | hid_debug_event(hdev, buff); |
2193 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]); |
2194 | hid_debug_event(hdev, buff); |
2195 | if (raw_data[3] == 0) { |
2196 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
2197 | } else if (raw_data[3] + 4 <= size) { |
2198 | snprintf(buff, BUFF_SZ, "\tData: "); |
2199 | hid_debug_event(hdev, buff); |
2200 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]); |
2201 | } else { |
2202 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
2203 | } |
2204 | break; |
2205 | case 3: |
2206 | snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n", |
2207 | raw_data[3], raw_data[2], raw_data[1]); |
2208 | hid_debug_event(hdev, buff); |
2209 | snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]); |
2210 | hid_debug_event(hdev, buff); |
2211 | if (raw_data[4] == 0) { |
2212 | snprintf(buff, BUFF_SZ, "\tNo data\n"); |
2213 | } else if (raw_data[4] + 5 <= size) { |
2214 | snprintf(buff, BUFF_SZ, "\tData: "); |
2215 | hid_debug_event(hdev, buff); |
2216 | dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]); |
2217 | } else { |
2218 | snprintf(buff, BUFF_SZ, "\tData overflowed\n"); |
2219 | } |
2220 | break; |
2221 | default: |
2222 | snprintf(buff, BUFF_SZ, "\tNot supported\n"); |
2223 | } |
2224 | hid_debug_event(hdev, buff); |
2225 | break; |
2226 | case REPORT_VERSION: |
2227 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2228 | "REPORT_VERSION", report->id, size-1); |
2229 | hid_debug_event(hdev, buff); |
2230 | snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", |
2231 | raw_data[2], raw_data[1]); |
2232 | hid_debug_event(hdev, buff); |
2233 | break; |
2234 | case REPORT_BL_ERASE_MEMORY: |
2235 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2236 | "REPORT_BL_ERASE_MEMORY", report->id, size-1); |
2237 | hid_debug_event(hdev, buff); |
2238 | /* TODO */ |
2239 | break; |
2240 | case REPORT_BL_READ_MEMORY: |
2241 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2242 | "REPORT_BL_READ_MEMORY", report->id, size-1); |
2243 | hid_debug_event(hdev, buff); |
2244 | /* TODO */ |
2245 | break; |
2246 | case REPORT_BL_WRITE_MEMORY: |
2247 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2248 | "REPORT_BL_WRITE_MEMORY", report->id, size-1); |
2249 | hid_debug_event(hdev, buff); |
2250 | /* TODO */ |
2251 | break; |
2252 | case REPORT_DEVID: |
2253 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2254 | "REPORT_DEVID", report->id, size-1); |
2255 | hid_debug_event(hdev, buff); |
2256 | snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n", |
2257 | raw_data[1], raw_data[2], raw_data[3], raw_data[4]); |
2258 | hid_debug_event(hdev, buff); |
2259 | snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n", |
2260 | raw_data[5]); |
2261 | hid_debug_event(hdev, buff); |
2262 | break; |
2263 | case REPORT_SPLASH_SIZE: |
2264 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2265 | "REPORT_SPLASH_SIZE", report->id, size-1); |
2266 | hid_debug_event(hdev, buff); |
2267 | snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n", |
2268 | (raw_data[2] << 8) | raw_data[1]); |
2269 | hid_debug_event(hdev, buff); |
2270 | snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n", |
2271 | (raw_data[4] << 8) | raw_data[3]); |
2272 | hid_debug_event(hdev, buff); |
2273 | break; |
2274 | case REPORT_HOOK_VERSION: |
2275 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2276 | "REPORT_HOOK_VERSION", report->id, size-1); |
2277 | hid_debug_event(hdev, buff); |
2278 | snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n", |
2279 | raw_data[1], raw_data[2]); |
2280 | hid_debug_event(hdev, buff); |
2281 | break; |
2282 | default: |
2283 | snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n", |
2284 | "<unknown>", report->id, size-1); |
2285 | hid_debug_event(hdev, buff); |
2286 | break; |
2287 | } |
2288 | wake_up_interruptible(&hdev->debug_wait); |
2289 | kfree(buff); |
2290 | } |
2291 | |
2292 | static void picolcd_init_devfs(struct picolcd_data *data, |
2293 | struct hid_report *eeprom_r, struct hid_report *eeprom_w, |
2294 | struct hid_report *flash_r, struct hid_report *flash_w, |
2295 | struct hid_report *reset) |
2296 | { |
2297 | struct hid_device *hdev = data->hdev; |
2298 | |
2299 | mutex_init(&data->mutex_flash); |
2300 | |
2301 | /* reset */ |
2302 | if (reset) |
2303 | data->debug_reset = debugfs_create_file("reset", 0600, |
2304 | hdev->debug_dir, data, &picolcd_debug_reset_fops); |
2305 | |
2306 | /* eeprom */ |
2307 | if (eeprom_r || eeprom_w) |
2308 | data->debug_eeprom = debugfs_create_file("eeprom", |
2309 | (eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0), |
2310 | hdev->debug_dir, data, &picolcd_debug_eeprom_fops); |
2311 | |
2312 | /* flash */ |
2313 | if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8) |
2314 | data->addr_sz = flash_r->field[0]->report_count - 1; |
2315 | else |
2316 | data->addr_sz = -1; |
2317 | if (data->addr_sz == 2 || data->addr_sz == 3) { |
2318 | data->debug_flash = debugfs_create_file("flash", |
2319 | (flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0), |
2320 | hdev->debug_dir, data, &picolcd_debug_flash_fops); |
2321 | } else if (flash_r || flash_w) |
2322 | hid_warn(hdev, "Unexpected FLASH access reports, please submit rdesc for review\n"); |
2323 | } |
2324 | |
2325 | static void picolcd_exit_devfs(struct picolcd_data *data) |
2326 | { |
2327 | struct dentry *dent; |
2328 | |
2329 | dent = data->debug_reset; |
2330 | data->debug_reset = NULL; |
2331 | if (dent) |
2332 | debugfs_remove(dent); |
2333 | dent = data->debug_eeprom; |
2334 | data->debug_eeprom = NULL; |
2335 | if (dent) |
2336 | debugfs_remove(dent); |
2337 | dent = data->debug_flash; |
2338 | data->debug_flash = NULL; |
2339 | if (dent) |
2340 | debugfs_remove(dent); |
2341 | mutex_destroy(&data->mutex_flash); |
2342 | } |
2343 | #else |
2344 | static inline void picolcd_debug_raw_event(struct picolcd_data *data, |
2345 | struct hid_device *hdev, struct hid_report *report, |
2346 | u8 *raw_data, int size) |
2347 | { |
2348 | } |
2349 | static inline void picolcd_init_devfs(struct picolcd_data *data, |
2350 | struct hid_report *eeprom_r, struct hid_report *eeprom_w, |
2351 | struct hid_report *flash_r, struct hid_report *flash_w, |
2352 | struct hid_report *reset) |
2353 | { |
2354 | } |
2355 | static inline void picolcd_exit_devfs(struct picolcd_data *data) |
2356 | { |
2357 | } |
2358 | #endif /* CONFIG_DEBUG_FS */ |
2359 | |
2360 | /* |
2361 | * Handle raw report as sent by device |
2362 | */ |
2363 | static int picolcd_raw_event(struct hid_device *hdev, |
2364 | struct hid_report *report, u8 *raw_data, int size) |
2365 | { |
2366 | struct picolcd_data *data = hid_get_drvdata(hdev); |
2367 | unsigned long flags; |
2368 | int ret = 0; |
2369 | |
2370 | if (!data) |
2371 | return 1; |
2372 | |
2373 | if (report->id == REPORT_KEY_STATE) { |
2374 | if (data->input_keys) |
2375 | ret = picolcd_raw_keypad(data, report, raw_data+1, size-1); |
2376 | } else if (report->id == REPORT_IR_DATA) { |
2377 | if (data->input_cir) |
2378 | ret = picolcd_raw_cir(data, report, raw_data+1, size-1); |
2379 | } else { |
2380 | spin_lock_irqsave(&data->lock, flags); |
2381 | /* |
2382 | * We let the caller of picolcd_send_and_wait() check if the |
2383 | * report we got is one of the expected ones or not. |
2384 | */ |
2385 | if (data->pending) { |
2386 | memcpy(data->pending->raw_data, raw_data+1, size-1); |
2387 | data->pending->raw_size = size-1; |
2388 | data->pending->in_report = report; |
2389 | complete(&data->pending->ready); |
2390 | } |
2391 | spin_unlock_irqrestore(&data->lock, flags); |
2392 | } |
2393 | |
2394 | picolcd_debug_raw_event(data, hdev, report, raw_data, size); |
2395 | return 1; |
2396 | } |
2397 | |
2398 | #ifdef CONFIG_PM |
2399 | static int picolcd_suspend(struct hid_device *hdev, pm_message_t message) |
2400 | { |
2401 | if (PMSG_IS_AUTO(message)) |
2402 | return 0; |
2403 | |
2404 | picolcd_suspend_backlight(hid_get_drvdata(hdev)); |
2405 | dbg_hid(PICOLCD_NAME " device ready for suspend\n"); |
2406 | return 0; |
2407 | } |
2408 | |
2409 | static int picolcd_resume(struct hid_device *hdev) |
2410 | { |
2411 | int ret; |
2412 | ret = picolcd_resume_backlight(hid_get_drvdata(hdev)); |
2413 | if (ret) |
2414 | dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret); |
2415 | return 0; |
2416 | } |
2417 | |
2418 | static int picolcd_reset_resume(struct hid_device *hdev) |
2419 | { |
2420 | int ret; |
2421 | ret = picolcd_reset(hdev); |
2422 | if (ret) |
2423 | dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret); |
2424 | ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0); |
2425 | if (ret) |
2426 | dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret); |
2427 | ret = picolcd_resume_lcd(hid_get_drvdata(hdev)); |
2428 | if (ret) |
2429 | dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret); |
2430 | ret = picolcd_resume_backlight(hid_get_drvdata(hdev)); |
2431 | if (ret) |
2432 | dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret); |
2433 | picolcd_leds_set(hid_get_drvdata(hdev)); |
2434 | return 0; |
2435 | } |
2436 | #endif |
2437 | |
2438 | /* initialize keypad input device */ |
2439 | static int picolcd_init_keys(struct picolcd_data *data, |
2440 | struct hid_report *report) |
2441 | { |
2442 | struct hid_device *hdev = data->hdev; |
2443 | struct input_dev *idev; |
2444 | int error, i; |
2445 | |
2446 | if (!report) |
2447 | return -ENODEV; |
2448 | if (report->maxfield != 1 || report->field[0]->report_count != 2 || |
2449 | report->field[0]->report_size != 8) { |
2450 | hid_err(hdev, "unsupported KEY_STATE report\n"); |
2451 | return -EINVAL; |
2452 | } |
2453 | |
2454 | idev = input_allocate_device(); |
2455 | if (idev == NULL) { |
2456 | hid_err(hdev, "failed to allocate input device\n"); |
2457 | return -ENOMEM; |
2458 | } |
2459 | input_set_drvdata(idev, hdev); |
2460 | memcpy(data->keycode, def_keymap, sizeof(def_keymap)); |
2461 | idev->name = hdev->name; |
2462 | idev->phys = hdev->phys; |
2463 | idev->uniq = hdev->uniq; |
2464 | idev->id.bustype = hdev->bus; |
2465 | idev->id.vendor = hdev->vendor; |
2466 | idev->id.product = hdev->product; |
2467 | idev->id.version = hdev->version; |
2468 | idev->dev.parent = hdev->dev.parent; |
2469 | idev->keycode = &data->keycode; |
2470 | idev->keycodemax = PICOLCD_KEYS; |
2471 | idev->keycodesize = sizeof(data->keycode[0]); |
2472 | input_set_capability(idev, EV_MSC, MSC_SCAN); |
2473 | set_bit(EV_REP, idev->evbit); |
2474 | for (i = 0; i < PICOLCD_KEYS; i++) |
2475 | input_set_capability(idev, EV_KEY, data->keycode[i]); |
2476 | error = input_register_device(idev); |
2477 | if (error) { |
2478 | hid_err(hdev, "error registering the input device\n"); |
2479 | input_free_device(idev); |
2480 | return error; |
2481 | } |
2482 | data->input_keys = idev; |
2483 | return 0; |
2484 | } |
2485 | |
2486 | static void picolcd_exit_keys(struct picolcd_data *data) |
2487 | { |
2488 | struct input_dev *idev = data->input_keys; |
2489 | |
2490 | data->input_keys = NULL; |
2491 | if (idev) |
2492 | input_unregister_device(idev); |
2493 | } |
2494 | |
2495 | /* initialize CIR input device */ |
2496 | static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report) |
2497 | { |
2498 | /* support not implemented yet */ |
2499 | return 0; |
2500 | } |
2501 | |
2502 | static inline void picolcd_exit_cir(struct picolcd_data *data) |
2503 | { |
2504 | } |
2505 | |
2506 | static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data) |
2507 | { |
2508 | int error; |
2509 | |
2510 | error = picolcd_check_version(hdev); |
2511 | if (error) |
2512 | return error; |
2513 | |
2514 | if (data->version[0] != 0 && data->version[1] != 3) |
2515 | hid_info(hdev, "Device with untested firmware revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n", |
2516 | dev_name(&hdev->dev)); |
2517 | |
2518 | /* Setup keypad input device */ |
2519 | error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev)); |
2520 | if (error) |
2521 | goto err; |
2522 | |
2523 | /* Setup CIR input device */ |
2524 | error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev)); |
2525 | if (error) |
2526 | goto err; |
2527 | |
2528 | /* Set up the framebuffer device */ |
2529 | error = picolcd_init_framebuffer(data); |
2530 | if (error) |
2531 | goto err; |
2532 | |
2533 | /* Setup lcd class device */ |
2534 | error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev)); |
2535 | if (error) |
2536 | goto err; |
2537 | |
2538 | /* Setup backlight class device */ |
2539 | error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev)); |
2540 | if (error) |
2541 | goto err; |
2542 | |
2543 | /* Setup the LED class devices */ |
2544 | error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev)); |
2545 | if (error) |
2546 | goto err; |
2547 | |
2548 | picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev), |
2549 | picolcd_out_report(REPORT_EE_WRITE, hdev), |
2550 | picolcd_out_report(REPORT_READ_MEMORY, hdev), |
2551 | picolcd_out_report(REPORT_WRITE_MEMORY, hdev), |
2552 | picolcd_out_report(REPORT_RESET, hdev)); |
2553 | return 0; |
2554 | err: |
2555 | picolcd_exit_leds(data); |
2556 | picolcd_exit_backlight(data); |
2557 | picolcd_exit_lcd(data); |
2558 | picolcd_exit_framebuffer(data); |
2559 | picolcd_exit_cir(data); |
2560 | picolcd_exit_keys(data); |
2561 | return error; |
2562 | } |
2563 | |
2564 | static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data) |
2565 | { |
2566 | int error; |
2567 | |
2568 | error = picolcd_check_version(hdev); |
2569 | if (error) |
2570 | return error; |
2571 | |
2572 | if (data->version[0] != 1 && data->version[1] != 0) |
2573 | hid_info(hdev, "Device with untested bootloader revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n", |
2574 | dev_name(&hdev->dev)); |
2575 | |
2576 | picolcd_init_devfs(data, NULL, NULL, |
2577 | picolcd_out_report(REPORT_BL_READ_MEMORY, hdev), |
2578 | picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL); |
2579 | return 0; |
2580 | } |
2581 | |
2582 | static int picolcd_probe(struct hid_device *hdev, |
2583 | const struct hid_device_id *id) |
2584 | { |
2585 | struct picolcd_data *data; |
2586 | int error = -ENOMEM; |
2587 | |
2588 | dbg_hid(PICOLCD_NAME " hardware probe...\n"); |
2589 | |
2590 | /* |
2591 | * Let's allocate the picolcd data structure, set some reasonable |
2592 | * defaults, and associate it with the device |
2593 | */ |
2594 | data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL); |
2595 | if (data == NULL) { |
2596 | hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n"); |
2597 | error = -ENOMEM; |
2598 | goto err_no_cleanup; |
2599 | } |
2600 | |
2601 | spin_lock_init(&data->lock); |
2602 | mutex_init(&data->mutex); |
2603 | data->hdev = hdev; |
2604 | data->opmode_delay = 5000; |
2605 | if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER) |
2606 | data->status |= PICOLCD_BOOTLOADER; |
2607 | hid_set_drvdata(hdev, data); |
2608 | |
2609 | /* Parse the device reports and start it up */ |
2610 | error = hid_parse(hdev); |
2611 | if (error) { |
2612 | hid_err(hdev, "device report parse failed\n"); |
2613 | goto err_cleanup_data; |
2614 | } |
2615 | |
2616 | error = hid_hw_start(hdev, 0); |
2617 | if (error) { |
2618 | hid_err(hdev, "hardware start failed\n"); |
2619 | goto err_cleanup_data; |
2620 | } |
2621 | |
2622 | error = hid_hw_open(hdev); |
2623 | if (error) { |
2624 | hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n"); |
2625 | goto err_cleanup_hid_hw; |
2626 | } |
2627 | |
2628 | error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay); |
2629 | if (error) { |
2630 | hid_err(hdev, "failed to create sysfs attributes\n"); |
2631 | goto err_cleanup_hid_ll; |
2632 | } |
2633 | |
2634 | error = device_create_file(&hdev->dev, &dev_attr_operation_mode); |
2635 | if (error) { |
2636 | hid_err(hdev, "failed to create sysfs attributes\n"); |
2637 | goto err_cleanup_sysfs1; |
2638 | } |
2639 | |
2640 | if (data->status & PICOLCD_BOOTLOADER) |
2641 | error = picolcd_probe_bootloader(hdev, data); |
2642 | else |
2643 | error = picolcd_probe_lcd(hdev, data); |
2644 | if (error) |
2645 | goto err_cleanup_sysfs2; |
2646 | |
2647 | dbg_hid(PICOLCD_NAME " activated and initialized\n"); |
2648 | return 0; |
2649 | |
2650 | err_cleanup_sysfs2: |
2651 | device_remove_file(&hdev->dev, &dev_attr_operation_mode); |
2652 | err_cleanup_sysfs1: |
2653 | device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay); |
2654 | err_cleanup_hid_ll: |
2655 | hid_hw_close(hdev); |
2656 | err_cleanup_hid_hw: |
2657 | hid_hw_stop(hdev); |
2658 | err_cleanup_data: |
2659 | kfree(data); |
2660 | err_no_cleanup: |
2661 | hid_set_drvdata(hdev, NULL); |
2662 | |
2663 | return error; |
2664 | } |
2665 | |
2666 | static void picolcd_remove(struct hid_device *hdev) |
2667 | { |
2668 | struct picolcd_data *data = hid_get_drvdata(hdev); |
2669 | unsigned long flags; |
2670 | |
2671 | dbg_hid(PICOLCD_NAME " hardware remove...\n"); |
2672 | spin_lock_irqsave(&data->lock, flags); |
2673 | data->status |= PICOLCD_FAILED; |
2674 | spin_unlock_irqrestore(&data->lock, flags); |
2675 | #ifdef CONFIG_HID_PICOLCD_FB |
2676 | /* short-circuit FB as early as possible in order to |
2677 | * avoid long delays if we host console. |
2678 | */ |
2679 | if (data->fb_info) |
2680 | data->fb_info->par = NULL; |
2681 | #endif |
2682 | |
2683 | picolcd_exit_devfs(data); |
2684 | device_remove_file(&hdev->dev, &dev_attr_operation_mode); |
2685 | device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay); |
2686 | hid_hw_close(hdev); |
2687 | hid_hw_stop(hdev); |
2688 | hid_set_drvdata(hdev, NULL); |
2689 | |
2690 | /* Shortcut potential pending reply that will never arrive */ |
2691 | spin_lock_irqsave(&data->lock, flags); |
2692 | if (data->pending) |
2693 | complete(&data->pending->ready); |
2694 | spin_unlock_irqrestore(&data->lock, flags); |
2695 | |
2696 | /* Cleanup LED */ |
2697 | picolcd_exit_leds(data); |
2698 | /* Clean up the framebuffer */ |
2699 | picolcd_exit_backlight(data); |
2700 | picolcd_exit_lcd(data); |
2701 | picolcd_exit_framebuffer(data); |
2702 | /* Cleanup input */ |
2703 | picolcd_exit_cir(data); |
2704 | picolcd_exit_keys(data); |
2705 | |
2706 | mutex_destroy(&data->mutex); |
2707 | /* Finally, clean up the picolcd data itself */ |
2708 | kfree(data); |
2709 | } |
2710 | |
2711 | static const struct hid_device_id picolcd_devices[] = { |
2712 | { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) }, |
2713 | { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) }, |
2714 | { } |
2715 | }; |
2716 | MODULE_DEVICE_TABLE(hid, picolcd_devices); |
2717 | |
2718 | static struct hid_driver picolcd_driver = { |
2719 | .name = "hid-picolcd", |
2720 | .id_table = picolcd_devices, |
2721 | .probe = picolcd_probe, |
2722 | .remove = picolcd_remove, |
2723 | .raw_event = picolcd_raw_event, |
2724 | #ifdef CONFIG_PM |
2725 | .suspend = picolcd_suspend, |
2726 | .resume = picolcd_resume, |
2727 | .reset_resume = picolcd_reset_resume, |
2728 | #endif |
2729 | }; |
2730 | |
2731 | static int __init picolcd_init(void) |
2732 | { |
2733 | return hid_register_driver(&picolcd_driver); |
2734 | } |
2735 | |
2736 | static void __exit picolcd_exit(void) |
2737 | { |
2738 | hid_unregister_driver(&picolcd_driver); |
2739 | #ifdef CONFIG_HID_PICOLCD_FB |
2740 | flush_work_sync(&picolcd_fb_cleanup); |
2741 | WARN_ON(fb_pending); |
2742 | #endif |
2743 | } |
2744 | |
2745 | module_init(picolcd_init); |
2746 | module_exit(picolcd_exit); |
2747 | MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver"); |
2748 | MODULE_LICENSE("GPL v2"); |
2749 |
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Tags:
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v2.6.34-rc5
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