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HID: picolcd: do not reallocate memory on depth change
[linux-2.6/cjktty.git] / drivers / hid / hid-picolcd.c
blobf7204541591c25244b696fecfc11d1635c396df8
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
40 #define PICOLCD_NAME "PicoLCD (graphic)"
41
42 /* Report numbers */
43 #define REPORT_ERROR_CODE 0x10 /* LCD: IN[16] */
44 #define ERR_SUCCESS 0x00
45 #define ERR_PARAMETER_MISSING 0x01
46 #define ERR_DATA_MISSING 0x02
47 #define ERR_BLOCK_READ_ONLY 0x03
48 #define ERR_BLOCK_NOT_ERASABLE 0x04
49 #define ERR_BLOCK_TOO_BIG 0x05
50 #define ERR_SECTION_OVERFLOW 0x06
51 #define ERR_INVALID_CMD_LEN 0x07
52 #define ERR_INVALID_DATA_LEN 0x08
53 #define REPORT_KEY_STATE 0x11 /* LCD: IN[2] */
54 #define REPORT_IR_DATA 0x21 /* LCD: IN[63] */
55 #define REPORT_EE_DATA 0x32 /* LCD: IN[63] */
56 #define REPORT_MEMORY 0x41 /* LCD: IN[63] */
57 #define REPORT_LED_STATE 0x81 /* LCD: OUT[1] */
58 #define REPORT_BRIGHTNESS 0x91 /* LCD: OUT[1] */
59 #define REPORT_CONTRAST 0x92 /* LCD: OUT[1] */
60 #define REPORT_RESET 0x93 /* LCD: OUT[2] */
61 #define REPORT_LCD_CMD 0x94 /* LCD: OUT[63] */
62 #define REPORT_LCD_DATA 0x95 /* LCD: OUT[63] */
63 #define REPORT_LCD_CMD_DATA 0x96 /* LCD: OUT[63] */
64 #define REPORT_EE_READ 0xa3 /* LCD: OUT[63] */
65 #define REPORT_EE_WRITE 0xa4 /* LCD: OUT[63] */
66 #define REPORT_ERASE_MEMORY 0xb2 /* LCD: OUT[2] */
67 #define REPORT_READ_MEMORY 0xb3 /* LCD: OUT[3] */
68 #define REPORT_WRITE_MEMORY 0xb4 /* LCD: OUT[63] */
69 #define REPORT_SPLASH_RESTART 0xc1 /* LCD: OUT[1] */
70 #define REPORT_EXIT_KEYBOARD 0xef /* LCD: OUT[2] */
71 #define REPORT_VERSION 0xf1 /* LCD: IN[2],OUT[1] Bootloader: IN[2],OUT[1] */
72 #define REPORT_BL_ERASE_MEMORY 0xf2 /* Bootloader: IN[36],OUT[4] */
73 #define REPORT_BL_READ_MEMORY 0xf3 /* Bootloader: IN[36],OUT[4] */
74 #define REPORT_BL_WRITE_MEMORY 0xf4 /* Bootloader: IN[36],OUT[36] */
75 #define REPORT_DEVID 0xf5 /* LCD: IN[5], OUT[1] Bootloader: IN[5],OUT[1] */
76 #define REPORT_SPLASH_SIZE 0xf6 /* LCD: IN[4], OUT[1] */
77 #define REPORT_HOOK_VERSION 0xf7 /* LCD: IN[2], OUT[1] */
78 #define REPORT_EXIT_FLASHER 0xff /* Bootloader: OUT[2] */
79
80 #ifdef CONFIG_HID_PICOLCD_FB
81 /* Framebuffer
82 *
83 * The PicoLCD use a Topway LCD module of 256x64 pixel
84 * This display area is tiled over 4 controllers with 8 tiles
85 * each. Each tile has 8x64 pixel, each data byte representing
86 * a 1-bit wide vertical line of the tile.
87 *
88 * The display can be updated at a tile granularity.
89 *
90 * Chip 1 Chip 2 Chip 3 Chip 4
91 * +----------------+----------------+----------------+----------------+
92 * | Tile 1 | Tile 1 | Tile 1 | Tile 1 |
93 * +----------------+----------------+----------------+----------------+
94 * | Tile 2 | Tile 2 | Tile 2 | Tile 2 |
95 * +----------------+----------------+----------------+----------------+
96 * ...
97 * +----------------+----------------+----------------+----------------+
98 * | Tile 8 | Tile 8 | Tile 8 | Tile 8 |
99 * +----------------+----------------+----------------+----------------+
100 */
101 #define PICOLCDFB_NAME "picolcdfb"
102 #define PICOLCDFB_WIDTH (256)
103 #define PICOLCDFB_HEIGHT (64)
104 #define PICOLCDFB_SIZE (PICOLCDFB_WIDTH * PICOLCDFB_HEIGHT / 8)
105
106 #define PICOLCDFB_UPDATE_RATE_LIMIT 10
107 #define PICOLCDFB_UPDATE_RATE_DEFAULT 2
108
109 /* Framebuffer visual structures */
110 static const struct fb_fix_screeninfo picolcdfb_fix = {
111 .id = PICOLCDFB_NAME,
112 .type = FB_TYPE_PACKED_PIXELS,
113 .visual = FB_VISUAL_MONO01,
114 .xpanstep = 0,
115 .ypanstep = 0,
116 .ywrapstep = 0,
117 .line_length = PICOLCDFB_WIDTH / 8,
118 .accel = FB_ACCEL_NONE,
119 };
120
121 static const struct fb_var_screeninfo picolcdfb_var = {
122 .xres = PICOLCDFB_WIDTH,
123 .yres = PICOLCDFB_HEIGHT,
124 .xres_virtual = PICOLCDFB_WIDTH,
125 .yres_virtual = PICOLCDFB_HEIGHT,
126 .width = 103,
127 .height = 26,
128 .bits_per_pixel = 1,
129 .grayscale = 1,
130 .red = {
131 .offset = 0,
132 .length = 1,
133 .msb_right = 0,
134 },
135 .green = {
136 .offset = 0,
137 .length = 1,
138 .msb_right = 0,
139 },
140 .blue = {
141 .offset = 0,
142 .length = 1,
143 .msb_right = 0,
144 },
145 .transp = {
146 .offset = 0,
147 .length = 0,
148 .msb_right = 0,
149 },
150 };
151 #endif /* CONFIG_HID_PICOLCD_FB */
152
153 /* Input device
154 *
155 * The PicoLCD has an IR receiver header, a built-in keypad with 5 keys
156 * and header for 4x4 key matrix. The built-in keys are part of the matrix.
157 */
158 static const unsigned short def_keymap[] = {
159 KEY_RESERVED, /* none */
160 KEY_BACK, /* col 4 + row 1 */
161 KEY_HOMEPAGE, /* col 3 + row 1 */
162 KEY_RESERVED, /* col 2 + row 1 */
163 KEY_RESERVED, /* col 1 + row 1 */
164 KEY_SCROLLUP, /* col 4 + row 2 */
165 KEY_OK, /* col 3 + row 2 */
166 KEY_SCROLLDOWN, /* col 2 + row 2 */
167 KEY_RESERVED, /* col 1 + row 2 */
168 KEY_RESERVED, /* col 4 + row 3 */
169 KEY_RESERVED, /* col 3 + row 3 */
170 KEY_RESERVED, /* col 2 + row 3 */
171 KEY_RESERVED, /* col 1 + row 3 */
172 KEY_RESERVED, /* col 4 + row 4 */
173 KEY_RESERVED, /* col 3 + row 4 */
174 KEY_RESERVED, /* col 2 + row 4 */
175 KEY_RESERVED, /* col 1 + row 4 */
176 };
177 #define PICOLCD_KEYS ARRAY_SIZE(def_keymap)
178
179 /* Description of in-progress IO operation, used for operations
180 * that trigger response from device */
181 struct picolcd_pending {
182 struct hid_report *out_report;
183 struct hid_report *in_report;
184 struct completion ready;
185 int raw_size;
186 u8 raw_data[64];
187 };
188
189 /* Per device data structure */
190 struct picolcd_data {
191 struct hid_device *hdev;
192 #ifdef CONFIG_DEBUG_FS
193 struct dentry *debug_reset;
194 struct dentry *debug_eeprom;
195 struct dentry *debug_flash;
196 struct mutex mutex_flash;
197 int addr_sz;
198 #endif
199 u8 version[2];
200 unsigned short opmode_delay;
201 /* input stuff */
202 u8 pressed_keys[2];
203 struct input_dev *input_keys;
204 struct input_dev *input_cir;
205 unsigned short keycode[PICOLCD_KEYS];
206
207 #ifdef CONFIG_HID_PICOLCD_FB
208 /* Framebuffer stuff */
209 u8 fb_update_rate;
210 u8 fb_bpp;
211 u8 fb_force;
212 u8 *fb_vbitmap; /* local copy of what was sent to PicoLCD */
213 u8 *fb_bitmap; /* framebuffer */
214 struct fb_info *fb_info;
215 struct fb_deferred_io fb_defio;
216 #endif /* CONFIG_HID_PICOLCD_FB */
217 #ifdef CONFIG_HID_PICOLCD_LCD
218 struct lcd_device *lcd;
219 u8 lcd_contrast;
220 #endif /* CONFIG_HID_PICOLCD_LCD */
221 #ifdef CONFIG_HID_PICOLCD_BACKLIGHT
222 struct backlight_device *backlight;
223 u8 lcd_brightness;
224 u8 lcd_power;
225 #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
226 #ifdef CONFIG_HID_PICOLCD_LEDS
227 /* LED stuff */
228 u8 led_state;
229 struct led_classdev *led[8];
230 #endif /* CONFIG_HID_PICOLCD_LEDS */
231
232 /* Housekeeping stuff */
233 spinlock_t lock;
234 struct mutex mutex;
235 struct picolcd_pending *pending;
236 int status;
237 #define PICOLCD_BOOTLOADER 1
238 #define PICOLCD_FAILED 2
239 #define PICOLCD_READY_FB 4
240 };
241
242
243 /* Find a given report */
244 #define picolcd_in_report(id, dev) picolcd_report(id, dev, HID_INPUT_REPORT)
245 #define picolcd_out_report(id, dev) picolcd_report(id, dev, HID_OUTPUT_REPORT)
246
247 static struct hid_report *picolcd_report(int id, struct hid_device *hdev, int dir)
248 {
249 struct list_head *feature_report_list = &hdev->report_enum[dir].report_list;
250 struct hid_report *report = NULL;
251
252 list_for_each_entry(report, feature_report_list, list) {
253 if (report->id == id)
254 return report;
255 }
256 dev_warn(&hdev->dev, "No report with id 0x%x found\n", id);
257 return NULL;
258 }
259
260 #ifdef CONFIG_DEBUG_FS
261 static void picolcd_debug_out_report(struct picolcd_data *data,
262 struct hid_device *hdev, struct hid_report *report);
263 #define usbhid_submit_report(a, b, c) \
264 do { \
265 picolcd_debug_out_report(hid_get_drvdata(a), a, b); \
266 usbhid_submit_report(a, b, c); \
267 } while (0)
268 #endif
269
270 /* Submit a report and wait for a reply from device - if device fades away
271 * or does not respond in time, return NULL */
272 static struct picolcd_pending *picolcd_send_and_wait(struct hid_device *hdev,
273 int report_id, const u8 *raw_data, int size)
274 {
275 struct picolcd_data *data = hid_get_drvdata(hdev);
276 struct picolcd_pending *work;
277 struct hid_report *report = picolcd_out_report(report_id, hdev);
278 unsigned long flags;
279 int i, j, k;
280
281 if (!report || !data)
282 return NULL;
283 if (data->status & PICOLCD_FAILED)
284 return NULL;
285 work = kzalloc(sizeof(*work), GFP_KERNEL);
286 if (!work)
287 return NULL;
288
289 init_completion(&work->ready);
290 work->out_report = report;
291 work->in_report = NULL;
292 work->raw_size = 0;
293
294 mutex_lock(&data->mutex);
295 spin_lock_irqsave(&data->lock, flags);
296 for (i = k = 0; i < report->maxfield; i++)
297 for (j = 0; j < report->field[i]->report_count; j++) {
298 hid_set_field(report->field[i], j, k < size ? raw_data[k] : 0);
299 k++;
300 }
301 data->pending = work;
302 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
303 spin_unlock_irqrestore(&data->lock, flags);
304 wait_for_completion_interruptible_timeout(&work->ready, HZ*2);
305 spin_lock_irqsave(&data->lock, flags);
306 data->pending = NULL;
307 spin_unlock_irqrestore(&data->lock, flags);
308 mutex_unlock(&data->mutex);
309 return work;
310 }
311
312 #ifdef CONFIG_HID_PICOLCD_FB
313 /* Send a given tile to PicoLCD */
314 static int picolcd_fb_send_tile(struct hid_device *hdev, int chip, int tile)
315 {
316 struct picolcd_data *data = hid_get_drvdata(hdev);
317 struct hid_report *report1 = picolcd_out_report(REPORT_LCD_CMD_DATA, hdev);
318 struct hid_report *report2 = picolcd_out_report(REPORT_LCD_DATA, hdev);
319 unsigned long flags;
320 u8 *tdata;
321 int i;
322
323 if (!report1 || report1->maxfield != 1 || !report2 || report2->maxfield != 1)
324 return -ENODEV;
325
326 spin_lock_irqsave(&data->lock, flags);
327 hid_set_field(report1->field[0], 0, chip << 2);
328 hid_set_field(report1->field[0], 1, 0x02);
329 hid_set_field(report1->field[0], 2, 0x00);
330 hid_set_field(report1->field[0], 3, 0x00);
331 hid_set_field(report1->field[0], 4, 0xb8 | tile);
332 hid_set_field(report1->field[0], 5, 0x00);
333 hid_set_field(report1->field[0], 6, 0x00);
334 hid_set_field(report1->field[0], 7, 0x40);
335 hid_set_field(report1->field[0], 8, 0x00);
336 hid_set_field(report1->field[0], 9, 0x00);
337 hid_set_field(report1->field[0], 10, 32);
338
339 hid_set_field(report2->field[0], 0, (chip << 2) | 0x01);
340 hid_set_field(report2->field[0], 1, 0x00);
341 hid_set_field(report2->field[0], 2, 0x00);
342 hid_set_field(report2->field[0], 3, 32);
343
344 tdata = data->fb_vbitmap + (tile * 4 + chip) * 64;
345 for (i = 0; i < 64; i++)
346 if (i < 32)
347 hid_set_field(report1->field[0], 11 + i, tdata[i]);
348 else
349 hid_set_field(report2->field[0], 4 + i - 32, tdata[i]);
350
351 usbhid_submit_report(data->hdev, report1, USB_DIR_OUT);
352 usbhid_submit_report(data->hdev, report2, USB_DIR_OUT);
353 spin_unlock_irqrestore(&data->lock, flags);
354 return 0;
355 }
356
357 /* Translate a single tile*/
358 static int picolcd_fb_update_tile(u8 *vbitmap, const u8 *bitmap, int bpp,
359 int chip, int tile)
360 {
361 int i, b, changed = 0;
362 u8 tdata[64];
363 u8 *vdata = vbitmap + (tile * 4 + chip) * 64;
364
365 if (bpp == 1) {
366 for (b = 7; b >= 0; b--) {
367 const u8 *bdata = bitmap + tile * 256 + chip * 8 + b * 32;
368 for (i = 0; i < 64; i++) {
369 tdata[i] <<= 1;
370 tdata[i] |= (bdata[i/8] >> (i % 8)) & 0x01;
371 }
372 }
373 } else if (bpp == 8) {
374 for (b = 7; b >= 0; b--) {
375 const u8 *bdata = bitmap + (tile * 256 + chip * 8 + b * 32) * 8;
376 for (i = 0; i < 64; i++) {
377 tdata[i] <<= 1;
378 tdata[i] |= (bdata[i] & 0x80) ? 0x01 : 0x00;
379 }
380 }
381 } else {
382 /* Oops, we should never get here! */
383 WARN_ON(1);
384 return 0;
385 }
386
387 for (i = 0; i < 64; i++)
388 if (tdata[i] != vdata[i]) {
389 changed = 1;
390 vdata[i] = tdata[i];
391 }
392 return changed;
393 }
394
395 /* Reconfigure LCD display */
396 static int picolcd_fb_reset(struct picolcd_data *data, int clear)
397 {
398 struct hid_report *report = picolcd_out_report(REPORT_LCD_CMD, data->hdev);
399 int i, j;
400 unsigned long flags;
401 static const u8 mapcmd[8] = { 0x00, 0x02, 0x00, 0x64, 0x3f, 0x00, 0x64, 0xc0 };
402
403 if (!report || report->maxfield != 1)
404 return -ENODEV;
405
406 spin_lock_irqsave(&data->lock, flags);
407 for (i = 0; i < 4; i++) {
408 for (j = 0; j < report->field[0]->maxusage; j++)
409 if (j == 0)
410 hid_set_field(report->field[0], j, i << 2);
411 else if (j < sizeof(mapcmd))
412 hid_set_field(report->field[0], j, mapcmd[j]);
413 else
414 hid_set_field(report->field[0], j, 0);
415 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
416 }
417
418 data->status |= PICOLCD_READY_FB;
419 spin_unlock_irqrestore(&data->lock, flags);
420
421 if (data->fb_bitmap) {
422 if (clear) {
423 memset(data->fb_vbitmap, 0, PICOLCDFB_SIZE);
424 memset(data->fb_bitmap, 0, PICOLCDFB_SIZE*data->fb_bpp);
425 }
426 data->fb_force = 1;
427 }
428
429 /* schedule first output of framebuffer */
430 if (data->fb_info)
431 schedule_delayed_work(&data->fb_info->deferred_work, 0);
432
433 return 0;
434 }
435
436 /* Update fb_vbitmap from the screen_base and send changed tiles to device */
437 static void picolcd_fb_update(struct picolcd_data *data)
438 {
439 int chip, tile, n;
440 unsigned long flags;
441
442 spin_lock_irqsave(&data->lock, flags);
443 if (!(data->status & PICOLCD_READY_FB)) {
444 spin_unlock_irqrestore(&data->lock, flags);
445 picolcd_fb_reset(data, 0);
446 } else {
447 spin_unlock_irqrestore(&data->lock, flags);
448 }
449
450 /*
451 * Translate the framebuffer into the format needed by the PicoLCD.
452 * See display layout above.
453 * Do this one tile after the other and push those tiles that changed.
454 *
455 * Wait for our IO to complete as otherwise we might flood the queue!
456 */
457 n = 0;
458 for (chip = 0; chip < 4; chip++)
459 for (tile = 0; tile < 8; tile++)
460 if (picolcd_fb_update_tile(data->fb_vbitmap,
461 data->fb_bitmap, data->fb_bpp, chip, tile) ||
462 data->fb_force) {
463 n += 2;
464 if (n >= HID_OUTPUT_FIFO_SIZE / 2) {
465 usbhid_wait_io(data->hdev);
466 n = 0;
467 }
468 picolcd_fb_send_tile(data->hdev, chip, tile);
469 }
470 data->fb_force = false;
471 if (n)
472 usbhid_wait_io(data->hdev);
473 }
474
475 /* Stub to call the system default and update the image on the picoLCD */
476 static void picolcd_fb_fillrect(struct fb_info *info,
477 const struct fb_fillrect *rect)
478 {
479 if (!info->par)
480 return;
481 sys_fillrect(info, rect);
482
483 schedule_delayed_work(&info->deferred_work, 0);
484 }
485
486 /* Stub to call the system default and update the image on the picoLCD */
487 static void picolcd_fb_copyarea(struct fb_info *info,
488 const struct fb_copyarea *area)
489 {
490 if (!info->par)
491 return;
492 sys_copyarea(info, area);
493
494 schedule_delayed_work(&info->deferred_work, 0);
495 }
496
497 /* Stub to call the system default and update the image on the picoLCD */
498 static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image *image)
499 {
500 if (!info->par)
501 return;
502 sys_imageblit(info, image);
503
504 schedule_delayed_work(&info->deferred_work, 0);
505 }
506
507 /*
508 * this is the slow path from userspace. they can seek and write to
509 * the fb. it's inefficient to do anything less than a full screen draw
510 */
511 static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf,
512 size_t count, loff_t *ppos)
513 {
514 ssize_t ret;
515 if (!info->par)
516 return -ENODEV;
517 ret = fb_sys_write(info, buf, count, ppos);
518 if (ret >= 0)
519 schedule_delayed_work(&info->deferred_work, 0);
520 return ret;
521 }
522
523 static int picolcd_fb_blank(int blank, struct fb_info *info)
524 {
525 if (!info->par)
526 return -ENODEV;
527 /* We let fb notification do this for us via lcd/backlight device */
528 return 0;
529 }
530
531 static void picolcd_fb_destroy(struct fb_info *info)
532 {
533 struct picolcd_data *data = info->par;
534 info->par = NULL;
535 if (data)
536 data->fb_info = NULL;
537 fb_deferred_io_cleanup(info);
538 framebuffer_release(info);
539 }
540
541 static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
542 {
543 __u32 bpp = var->bits_per_pixel;
544 __u32 activate = var->activate;
545
546 /* only allow 1/8 bit depth (8-bit is grayscale) */
547 *var = picolcdfb_var;
548 var->activate = activate;
549 if (bpp >= 8) {
550 var->bits_per_pixel = 8;
551 var->red.length = 8;
552 var->green.length = 8;
553 var->blue.length = 8;
554 } else {
555 var->bits_per_pixel = 1;
556 var->red.length = 1;
557 var->green.length = 1;
558 var->blue.length = 1;
559 }
560 return 0;
561 }
562
563 static int picolcd_set_par(struct fb_info *info)
564 {
565 struct picolcd_data *data = info->par;
566 u8 *tmp_fb, *o_fb;
567 if (info->var.bits_per_pixel == data->fb_bpp)
568 return 0;
569 /* switch between 1/8 bit depths */
570 if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8)
571 return -EINVAL;
572
573 o_fb = data->fb_bitmap;
574 tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL);
575 if (!tmp_fb)
576 return -ENOMEM;
577
578 /* translate FB content to new bits-per-pixel */
579 if (info->var.bits_per_pixel == 1) {
580 int i, b;
581 for (i = 0; i < PICOLCDFB_SIZE; i++) {
582 u8 p = 0;
583 for (b = 0; b < 8; b++) {
584 p <<= 1;
585 p |= o_fb[i*8+b] ? 0x01 : 0x00;
586 }
587 tmp_fb[i] = p;
588 }
589 memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE);
590 info->fix.visual = FB_VISUAL_MONO01;
591 info->fix.line_length = PICOLCDFB_WIDTH / 8;
592 } else {
593 int i;
594 memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE);
595 for (i = 0; i < PICOLCDFB_SIZE * 8; i++)
596 o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
597 info->fix.visual = FB_VISUAL_DIRECTCOLOR;
598 info->fix.line_length = PICOLCDFB_WIDTH;
599 }
600
601 kfree(tmp_fb);
602 data->fb_bpp = info->var.bits_per_pixel;
603 return 0;
604 }
605
606 /* Note this can't be const because of struct fb_info definition */
607 static struct fb_ops picolcdfb_ops = {
608 .owner = THIS_MODULE,
609 .fb_destroy = picolcd_fb_destroy,
610 .fb_read = fb_sys_read,
611 .fb_write = picolcd_fb_write,
612 .fb_blank = picolcd_fb_blank,
613 .fb_fillrect = picolcd_fb_fillrect,
614 .fb_copyarea = picolcd_fb_copyarea,
615 .fb_imageblit = picolcd_fb_imageblit,
616 .fb_check_var = picolcd_fb_check_var,
617 .fb_set_par = picolcd_set_par,
618 };
619
620
621 /* Callback from deferred IO workqueue */
622 static void picolcd_fb_deferred_io(struct fb_info *info, struct list_head *pagelist)
623 {
624 picolcd_fb_update(info->par);
625 }
626
627 static const struct fb_deferred_io picolcd_fb_defio = {
628 .delay = HZ / PICOLCDFB_UPDATE_RATE_DEFAULT,
629 .deferred_io = picolcd_fb_deferred_io,
630 };
631
632
633 /*
634 * The "fb_update_rate" sysfs attribute
635 */
636 static ssize_t picolcd_fb_update_rate_show(struct device *dev,
637 struct device_attribute *attr, char *buf)
638 {
639 struct picolcd_data *data = dev_get_drvdata(dev);
640 unsigned i, fb_update_rate = data->fb_update_rate;
641 size_t ret = 0;
642
643 for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++)
644 if (ret >= PAGE_SIZE)
645 break;
646 else if (i == fb_update_rate)
647 ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
648 else
649 ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
650 if (ret > 0)
651 buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
652 return ret;
653 }
654
655 static ssize_t picolcd_fb_update_rate_store(struct device *dev,
656 struct device_attribute *attr, const char *buf, size_t count)
657 {
658 struct picolcd_data *data = dev_get_drvdata(dev);
659 int i;
660 unsigned u;
661
662 if (count < 1 || count > 10)
663 return -EINVAL;
664
665 i = sscanf(buf, "%u", &u);
666 if (i != 1)
667 return -EINVAL;
668
669 if (u > PICOLCDFB_UPDATE_RATE_LIMIT)
670 return -ERANGE;
671 else if (u == 0)
672 u = PICOLCDFB_UPDATE_RATE_DEFAULT;
673
674 data->fb_update_rate = u;
675 data->fb_defio.delay = HZ / data->fb_update_rate;
676 return count;
677 }
678
679 static DEVICE_ATTR(fb_update_rate, 0666, picolcd_fb_update_rate_show,
680 picolcd_fb_update_rate_store);
681
682 /* initialize Framebuffer device */
683 static int picolcd_init_framebuffer(struct picolcd_data *data)
684 {
685 struct device *dev = &data->hdev->dev;
686 struct fb_info *info = NULL;
687 int i, error = -ENOMEM;
688 u8 *fb_vbitmap = NULL;
689 u8 *fb_bitmap = NULL;
690 u32 *palette;
691
692 fb_bitmap = vmalloc(PICOLCDFB_SIZE*8);
693 if (fb_bitmap == NULL) {
694 dev_err(dev, "can't get a free page for framebuffer\n");
695 goto err_nomem;
696 }
697
698 fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL);
699 if (fb_vbitmap == NULL) {
700 dev_err(dev, "can't alloc vbitmap image buffer\n");
701 goto err_nomem;
702 }
703
704 data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
705 data->fb_defio = picolcd_fb_defio;
706 /* The extra memory is:
707 * - struct picolcd_fb_cleanup_item
708 * - u32 for ref_count
709 * - 256*u32 for pseudo_palette
710 */
711 info = framebuffer_alloc(257 * sizeof(u32), dev);
712 if (info == NULL) {
713 dev_err(dev, "failed to allocate a framebuffer\n");
714 goto err_nomem;
715 }
716
717 palette = info->par;
718 *palette = 1;
719 palette++;
720 for (i = 0; i < 256; i++)
721 palette[i] = i > 0 && i < 16 ? 0xff : 0;
722 info->pseudo_palette = palette;
723 info->fbdefio = &data->fb_defio;
724 info->screen_base = (char __force __iomem *)fb_bitmap;
725 info->fbops = &picolcdfb_ops;
726 info->var = picolcdfb_var;
727 info->fix = picolcdfb_fix;
728 info->fix.smem_len = PICOLCDFB_SIZE*8;
729 info->fix.smem_start = (unsigned long)fb_bitmap;
730 info->par = data;
731 info->flags = FBINFO_FLAG_DEFAULT;
732
733 data->fb_vbitmap = fb_vbitmap;
734 data->fb_bitmap = fb_bitmap;
735 data->fb_bpp = picolcdfb_var.bits_per_pixel;
736 error = picolcd_fb_reset(data, 1);
737 if (error) {
738 dev_err(dev, "failed to configure display\n");
739 goto err_cleanup;
740 }
741 error = device_create_file(dev, &dev_attr_fb_update_rate);
742 if (error) {
743 dev_err(dev, "failed to create sysfs attributes\n");
744 goto err_cleanup;
745 }
746 fb_deferred_io_init(info);
747 data->fb_info = info;
748 error = register_framebuffer(info);
749 if (error) {
750 dev_err(dev, "failed to register framebuffer\n");
751 goto err_sysfs;
752 }
753 /* schedule first output of framebuffer */
754 data->fb_force = 1;
755 schedule_delayed_work(&info->deferred_work, 0);
756 return 0;
757
758 err_sysfs:
759 fb_deferred_io_cleanup(info);
760 device_remove_file(dev, &dev_attr_fb_update_rate);
761 err_cleanup:
762 data->fb_vbitmap = NULL;
763 data->fb_bitmap = NULL;
764 data->fb_bpp = 0;
765 data->fb_info = NULL;
766
767 err_nomem:
768 framebuffer_release(info);
769 vfree(fb_bitmap);
770 kfree(fb_vbitmap);
771 return error;
772 }
773
774 static void picolcd_exit_framebuffer(struct picolcd_data *data)
775 {
776 struct fb_info *info = data->fb_info;
777 u8 *fb_vbitmap = data->fb_vbitmap;
778 u8 *fb_bitmap = data->fb_bitmap;
779
780 if (!info)
781 return;
782
783 data->fb_vbitmap = NULL;
784 data->fb_bitmap = NULL;
785 data->fb_bpp = 0;
786 data->fb_info = NULL;
787 device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
788 unregister_framebuffer(info);
789 vfree(fb_bitmap);
790 kfree(fb_vbitmap);
791 }
792
793 #define picolcd_fbinfo(d) ((d)->fb_info)
794 #else
795 static inline int picolcd_fb_reset(struct picolcd_data *data, int clear)
796 {
797 return 0;
798 }
799 static inline int picolcd_init_framebuffer(struct picolcd_data *data)
800 {
801 return 0;
802 }
803 static inline void picolcd_exit_framebuffer(struct picolcd_data *data)
804 {
805 }
806 #define picolcd_fbinfo(d) NULL
807 #endif /* CONFIG_HID_PICOLCD_FB */
808
809 #ifdef CONFIG_HID_PICOLCD_BACKLIGHT
810 /*
811 * backlight class device
812 */
813 static int picolcd_get_brightness(struct backlight_device *bdev)
814 {
815 struct picolcd_data *data = bl_get_data(bdev);
816 return data->lcd_brightness;
817 }
818
819 static int picolcd_set_brightness(struct backlight_device *bdev)
820 {
821 struct picolcd_data *data = bl_get_data(bdev);
822 struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev);
823 unsigned long flags;
824
825 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
826 return -ENODEV;
827
828 data->lcd_brightness = bdev->props.brightness & 0x0ff;
829 data->lcd_power = bdev->props.power;
830 spin_lock_irqsave(&data->lock, flags);
831 hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0);
832 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
833 spin_unlock_irqrestore(&data->lock, flags);
834 return 0;
835 }
836
837 static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
838 {
839 return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
840 }
841
842 static const struct backlight_ops picolcd_blops = {
843 .update_status = picolcd_set_brightness,
844 .get_brightness = picolcd_get_brightness,
845 .check_fb = picolcd_check_bl_fb,
846 };
847
848 static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
849 {
850 struct device *dev = &data->hdev->dev;
851 struct backlight_device *bdev;
852 struct backlight_properties props;
853 if (!report)
854 return -ENODEV;
855 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
856 report->field[0]->report_size != 8) {
857 dev_err(dev, "unsupported BRIGHTNESS report");
858 return -EINVAL;
859 }
860
861 memset(&props, 0, sizeof(props));
862 props.max_brightness = 0xff;
863 bdev = backlight_device_register(dev_name(dev), dev, data,
864 &picolcd_blops, &props);
865 if (IS_ERR(bdev)) {
866 dev_err(dev, "failed to register backlight\n");
867 return PTR_ERR(bdev);
868 }
869 bdev->props.brightness = 0xff;
870 data->lcd_brightness = 0xff;
871 data->backlight = bdev;
872 picolcd_set_brightness(bdev);
873 return 0;
874 }
875
876 static void picolcd_exit_backlight(struct picolcd_data *data)
877 {
878 struct backlight_device *bdev = data->backlight;
879
880 data->backlight = NULL;
881 if (bdev)
882 backlight_device_unregister(bdev);
883 }
884
885 static inline int picolcd_resume_backlight(struct picolcd_data *data)
886 {
887 if (!data->backlight)
888 return 0;
889 return picolcd_set_brightness(data->backlight);
890 }
891
892 #ifdef CONFIG_PM
893 static void picolcd_suspend_backlight(struct picolcd_data *data)
894 {
895 int bl_power = data->lcd_power;
896 if (!data->backlight)
897 return;
898
899 data->backlight->props.power = FB_BLANK_POWERDOWN;
900 picolcd_set_brightness(data->backlight);
901 data->lcd_power = data->backlight->props.power = bl_power;
902 }
903 #endif /* CONFIG_PM */
904 #else
905 static inline int picolcd_init_backlight(struct picolcd_data *data,
906 struct hid_report *report)
907 {
908 return 0;
909 }
910 static inline void picolcd_exit_backlight(struct picolcd_data *data)
911 {
912 }
913 static inline int picolcd_resume_backlight(struct picolcd_data *data)
914 {
915 return 0;
916 }
917 static inline void picolcd_suspend_backlight(struct picolcd_data *data)
918 {
919 }
920 #endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
921
922 #ifdef CONFIG_HID_PICOLCD_LCD
923 /*
924 * lcd class device
925 */
926 static int picolcd_get_contrast(struct lcd_device *ldev)
927 {
928 struct picolcd_data *data = lcd_get_data(ldev);
929 return data->lcd_contrast;
930 }
931
932 static int picolcd_set_contrast(struct lcd_device *ldev, int contrast)
933 {
934 struct picolcd_data *data = lcd_get_data(ldev);
935 struct hid_report *report = picolcd_out_report(REPORT_CONTRAST, data->hdev);
936 unsigned long flags;
937
938 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
939 return -ENODEV;
940
941 data->lcd_contrast = contrast & 0x0ff;
942 spin_lock_irqsave(&data->lock, flags);
943 hid_set_field(report->field[0], 0, data->lcd_contrast);
944 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
945 spin_unlock_irqrestore(&data->lock, flags);
946 return 0;
947 }
948
949 static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
950 {
951 return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev));
952 }
953
954 static struct lcd_ops picolcd_lcdops = {
955 .get_contrast = picolcd_get_contrast,
956 .set_contrast = picolcd_set_contrast,
957 .check_fb = picolcd_check_lcd_fb,
958 };
959
960 static int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report)
961 {
962 struct device *dev = &data->hdev->dev;
963 struct lcd_device *ldev;
964
965 if (!report)
966 return -ENODEV;
967 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
968 report->field[0]->report_size != 8) {
969 dev_err(dev, "unsupported CONTRAST report");
970 return -EINVAL;
971 }
972
973 ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops);
974 if (IS_ERR(ldev)) {
975 dev_err(dev, "failed to register LCD\n");
976 return PTR_ERR(ldev);
977 }
978 ldev->props.max_contrast = 0x0ff;
979 data->lcd_contrast = 0xe5;
980 data->lcd = ldev;
981 picolcd_set_contrast(ldev, 0xe5);
982 return 0;
983 }
984
985 static void picolcd_exit_lcd(struct picolcd_data *data)
986 {
987 struct lcd_device *ldev = data->lcd;
988
989 data->lcd = NULL;
990 if (ldev)
991 lcd_device_unregister(ldev);
992 }
993
994 static inline int picolcd_resume_lcd(struct picolcd_data *data)
995 {
996 if (!data->lcd)
997 return 0;
998 return picolcd_set_contrast(data->lcd, data->lcd_contrast);
999 }
1000 #else
1001 static inline int picolcd_init_lcd(struct picolcd_data *data,
1002 struct hid_report *report)
1003 {
1004 return 0;
1005 }
1006 static inline void picolcd_exit_lcd(struct picolcd_data *data)
1007 {
1008 }
1009 static inline int picolcd_resume_lcd(struct picolcd_data *data)
1010 {
1011 return 0;
1012 }
1013 #endif /* CONFIG_HID_PICOLCD_LCD */
1014
1015 #ifdef CONFIG_HID_PICOLCD_LEDS
1016 /**
1017 * LED class device
1018 */
1019 static void picolcd_leds_set(struct picolcd_data *data)
1020 {
1021 struct hid_report *report;
1022 unsigned long flags;
1023
1024 if (!data->led[0])
1025 return;
1026 report = picolcd_out_report(REPORT_LED_STATE, data->hdev);
1027 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
1028 return;
1029
1030 spin_lock_irqsave(&data->lock, flags);
1031 hid_set_field(report->field[0], 0, data->led_state);
1032 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
1033 spin_unlock_irqrestore(&data->lock, flags);
1034 }
1035
1036 static void picolcd_led_set_brightness(struct led_classdev *led_cdev,
1037 enum led_brightness value)
1038 {
1039 struct device *dev;
1040 struct hid_device *hdev;
1041 struct picolcd_data *data;
1042 int i, state = 0;
1043
1044 dev = led_cdev->dev->parent;
1045 hdev = container_of(dev, struct hid_device, dev);
1046 data = hid_get_drvdata(hdev);
1047 for (i = 0; i < 8; i++) {
1048 if (led_cdev != data->led[i])
1049 continue;
1050 state = (data->led_state >> i) & 1;
1051 if (value == LED_OFF && state) {
1052 data->led_state &= ~(1 << i);
1053 picolcd_leds_set(data);
1054 } else if (value != LED_OFF && !state) {
1055 data->led_state |= 1 << i;
1056 picolcd_leds_set(data);
1057 }
1058 break;
1059 }
1060 }
1061
1062 static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev)
1063 {
1064 struct device *dev;
1065 struct hid_device *hdev;
1066 struct picolcd_data *data;
1067 int i, value = 0;
1068
1069 dev = led_cdev->dev->parent;
1070 hdev = container_of(dev, struct hid_device, dev);
1071 data = hid_get_drvdata(hdev);
1072 for (i = 0; i < 8; i++)
1073 if (led_cdev == data->led[i]) {
1074 value = (data->led_state >> i) & 1;
1075 break;
1076 }
1077 return value ? LED_FULL : LED_OFF;
1078 }
1079
1080 static int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
1081 {
1082 struct device *dev = &data->hdev->dev;
1083 struct led_classdev *led;
1084 size_t name_sz = strlen(dev_name(dev)) + 8;
1085 char *name;
1086 int i, ret = 0;
1087
1088 if (!report)
1089 return -ENODEV;
1090 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
1091 report->field[0]->report_size != 8) {
1092 dev_err(dev, "unsupported LED_STATE report");
1093 return -EINVAL;
1094 }
1095
1096 for (i = 0; i < 8; i++) {
1097 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1098 if (!led) {
1099 dev_err(dev, "can't allocate memory for LED %d\n", i);
1100 ret = -ENOMEM;
1101 goto err;
1102 }
1103 name = (void *)(&led[1]);
1104 snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i);
1105 led->name = name;
1106 led->brightness = 0;
1107 led->max_brightness = 1;
1108 led->brightness_get = picolcd_led_get_brightness;
1109 led->brightness_set = picolcd_led_set_brightness;
1110
1111 data->led[i] = led;
1112 ret = led_classdev_register(dev, data->led[i]);
1113 if (ret) {
1114 data->led[i] = NULL;
1115 kfree(led);
1116 dev_err(dev, "can't register LED %d\n", i);
1117 goto err;
1118 }
1119 }
1120 return 0;
1121 err:
1122 for (i = 0; i < 8; i++)
1123 if (data->led[i]) {
1124 led = data->led[i];
1125 data->led[i] = NULL;
1126 led_classdev_unregister(led);
1127 kfree(led);
1128 }
1129 return ret;
1130 }
1131
1132 static void picolcd_exit_leds(struct picolcd_data *data)
1133 {
1134 struct led_classdev *led;
1135 int i;
1136
1137 for (i = 0; i < 8; i++) {
1138 led = data->led[i];
1139 data->led[i] = NULL;
1140 if (!led)
1141 continue;
1142 led_classdev_unregister(led);
1143 kfree(led);
1144 }
1145 }
1146
1147 #else
1148 static inline int picolcd_init_leds(struct picolcd_data *data,
1149 struct hid_report *report)
1150 {
1151 return 0;
1152 }
1153 static inline void picolcd_exit_leds(struct picolcd_data *data)
1154 {
1155 }
1156 static inline int picolcd_leds_set(struct picolcd_data *data)
1157 {
1158 return 0;
1159 }
1160 #endif /* CONFIG_HID_PICOLCD_LEDS */
1161
1162 /*
1163 * input class device
1164 */
1165 static int picolcd_raw_keypad(struct picolcd_data *data,
1166 struct hid_report *report, u8 *raw_data, int size)
1167 {
1168 /*
1169 * Keypad event
1170 * First and second data bytes list currently pressed keys,
1171 * 0x00 means no key and at most 2 keys may be pressed at same time
1172 */
1173 int i, j;
1174
1175 /* determine newly pressed keys */
1176 for (i = 0; i < size; i++) {
1177 unsigned int key_code;
1178 if (raw_data[i] == 0)
1179 continue;
1180 for (j = 0; j < sizeof(data->pressed_keys); j++)
1181 if (data->pressed_keys[j] == raw_data[i])
1182 goto key_already_down;
1183 for (j = 0; j < sizeof(data->pressed_keys); j++)
1184 if (data->pressed_keys[j] == 0) {
1185 data->pressed_keys[j] = raw_data[i];
1186 break;
1187 }
1188 input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]);
1189 if (raw_data[i] < PICOLCD_KEYS)
1190 key_code = data->keycode[raw_data[i]];
1191 else
1192 key_code = KEY_UNKNOWN;
1193 if (key_code != KEY_UNKNOWN) {
1194 dbg_hid(PICOLCD_NAME " got key press for %u:%d",
1195 raw_data[i], key_code);
1196 input_report_key(data->input_keys, key_code, 1);
1197 }
1198 input_sync(data->input_keys);
1199 key_already_down:
1200 continue;
1201 }
1202
1203 /* determine newly released keys */
1204 for (j = 0; j < sizeof(data->pressed_keys); j++) {
1205 unsigned int key_code;
1206 if (data->pressed_keys[j] == 0)
1207 continue;
1208 for (i = 0; i < size; i++)
1209 if (data->pressed_keys[j] == raw_data[i])
1210 goto key_still_down;
1211 input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]);
1212 if (data->pressed_keys[j] < PICOLCD_KEYS)
1213 key_code = data->keycode[data->pressed_keys[j]];
1214 else
1215 key_code = KEY_UNKNOWN;
1216 if (key_code != KEY_UNKNOWN) {
1217 dbg_hid(PICOLCD_NAME " got key release for %u:%d",
1218 data->pressed_keys[j], key_code);
1219 input_report_key(data->input_keys, key_code, 0);
1220 }
1221 input_sync(data->input_keys);
1222 data->pressed_keys[j] = 0;
1223 key_still_down:
1224 continue;
1225 }
1226 return 1;
1227 }
1228
1229 static int picolcd_raw_cir(struct picolcd_data *data,
1230 struct hid_report *report, u8 *raw_data, int size)
1231 {
1232 /* Need understanding of CIR data format to implement ... */
1233 return 1;
1234 }
1235
1236 static int picolcd_check_version(struct hid_device *hdev)
1237 {
1238 struct picolcd_data *data = hid_get_drvdata(hdev);
1239 struct picolcd_pending *verinfo;
1240 int ret = 0;
1241
1242 if (!data)
1243 return -ENODEV;
1244
1245 verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
1246 if (!verinfo) {
1247 dev_err(&hdev->dev, "no version response from PicoLCD");
1248 return -ENODEV;
1249 }
1250
1251 if (verinfo->raw_size == 2) {
1252 data->version[0] = verinfo->raw_data[1];
1253 data->version[1] = verinfo->raw_data[0];
1254 if (data->status & PICOLCD_BOOTLOADER) {
1255 dev_info(&hdev->dev, "PicoLCD, bootloader version %d.%d\n",
1256 verinfo->raw_data[1], verinfo->raw_data[0]);
1257 } else {
1258 dev_info(&hdev->dev, "PicoLCD, firmware version %d.%d\n",
1259 verinfo->raw_data[1], verinfo->raw_data[0]);
1260 }
1261 } else {
1262 dev_err(&hdev->dev, "confused, got unexpected version response from PicoLCD\n");
1263 ret = -EINVAL;
1264 }
1265 kfree(verinfo);
1266 return ret;
1267 }
1268
1269 /*
1270 * Reset our device and wait for answer to VERSION request
1271 */
1272 static int picolcd_reset(struct hid_device *hdev)
1273 {
1274 struct picolcd_data *data = hid_get_drvdata(hdev);
1275 struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev);
1276 unsigned long flags;
1277 int error;
1278
1279 if (!data || !report || report->maxfield != 1)
1280 return -ENODEV;
1281
1282 spin_lock_irqsave(&data->lock, flags);
1283 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
1284 data->status |= PICOLCD_BOOTLOADER;
1285
1286 /* perform the reset */
1287 hid_set_field(report->field[0], 0, 1);
1288 usbhid_submit_report(hdev, report, USB_DIR_OUT);
1289 spin_unlock_irqrestore(&data->lock, flags);
1290
1291 error = picolcd_check_version(hdev);
1292 if (error)
1293 return error;
1294
1295 picolcd_resume_lcd(data);
1296 picolcd_resume_backlight(data);
1297 #ifdef CONFIG_HID_PICOLCD_FB
1298 if (data->fb_info)
1299 schedule_delayed_work(&data->fb_info->deferred_work, 0);
1300 #endif /* CONFIG_HID_PICOLCD_FB */
1301
1302 picolcd_leds_set(data);
1303 return 0;
1304 }
1305
1306 /*
1307 * The "operation_mode" sysfs attribute
1308 */
1309 static ssize_t picolcd_operation_mode_show(struct device *dev,
1310 struct device_attribute *attr, char *buf)
1311 {
1312 struct picolcd_data *data = dev_get_drvdata(dev);
1313
1314 if (data->status & PICOLCD_BOOTLOADER)
1315 return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
1316 else
1317 return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
1318 }
1319
1320 static ssize_t picolcd_operation_mode_store(struct device *dev,
1321 struct device_attribute *attr, const char *buf, size_t count)
1322 {
1323 struct picolcd_data *data = dev_get_drvdata(dev);
1324 struct hid_report *report = NULL;
1325 size_t cnt = count;
1326 int timeout = data->opmode_delay;
1327 unsigned long flags;
1328
1329 if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
1330 if (data->status & PICOLCD_BOOTLOADER)
1331 report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
1332 buf += 3;
1333 cnt -= 3;
1334 } else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
1335 if (!(data->status & PICOLCD_BOOTLOADER))
1336 report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
1337 buf += 10;
1338 cnt -= 10;
1339 }
1340 if (!report)
1341 return -EINVAL;
1342
1343 while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
1344 cnt--;
1345 if (cnt != 0)
1346 return -EINVAL;
1347
1348 spin_lock_irqsave(&data->lock, flags);
1349 hid_set_field(report->field[0], 0, timeout & 0xff);
1350 hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
1351 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
1352 spin_unlock_irqrestore(&data->lock, flags);
1353 return count;
1354 }
1355
1356 static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
1357 picolcd_operation_mode_store);
1358
1359 /*
1360 * The "operation_mode_delay" sysfs attribute
1361 */
1362 static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
1363 struct device_attribute *attr, char *buf)
1364 {
1365 struct picolcd_data *data = dev_get_drvdata(dev);
1366
1367 return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
1368 }
1369
1370 static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
1371 struct device_attribute *attr, const char *buf, size_t count)
1372 {
1373 struct picolcd_data *data = dev_get_drvdata(dev);
1374 unsigned u;
1375 if (sscanf(buf, "%u", &u) != 1)
1376 return -EINVAL;
1377 if (u > 30000)
1378 return -EINVAL;
1379 else
1380 data->opmode_delay = u;
1381 return count;
1382 }
1383
1384 static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
1385 picolcd_operation_mode_delay_store);
1386
1387
1388 #ifdef CONFIG_DEBUG_FS
1389 /*
1390 * The "reset" file
1391 */
1392 static int picolcd_debug_reset_show(struct seq_file *f, void *p)
1393 {
1394 if (picolcd_fbinfo((struct picolcd_data *)f->private))
1395 seq_printf(f, "all fb\n");
1396 else
1397 seq_printf(f, "all\n");
1398 return 0;
1399 }
1400
1401 static int picolcd_debug_reset_open(struct inode *inode, struct file *f)
1402 {
1403 return single_open(f, picolcd_debug_reset_show, inode->i_private);
1404 }
1405
1406 static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf,
1407 size_t count, loff_t *ppos)
1408 {
1409 struct picolcd_data *data = ((struct seq_file *)f->private_data)->private;
1410 char buf[32];
1411 size_t cnt = min(count, sizeof(buf)-1);
1412 if (copy_from_user(buf, user_buf, cnt))
1413 return -EFAULT;
1414
1415 while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n'))
1416 cnt--;
1417 buf[cnt] = '\0';
1418 if (strcmp(buf, "all") == 0) {
1419 picolcd_reset(data->hdev);
1420 picolcd_fb_reset(data, 1);
1421 } else if (strcmp(buf, "fb") == 0) {
1422 picolcd_fb_reset(data, 1);
1423 } else {
1424 return -EINVAL;
1425 }
1426 return count;
1427 }
1428
1429 static const struct file_operations picolcd_debug_reset_fops = {
1430 .owner = THIS_MODULE,
1431 .open = picolcd_debug_reset_open,
1432 .read = seq_read,
1433 .llseek = seq_lseek,
1434 .write = picolcd_debug_reset_write,
1435 .release = single_release,
1436 };
1437
1438 /*
1439 * The "eeprom" file
1440 */
1441 static int picolcd_debug_eeprom_open(struct inode *i, struct file *f)
1442 {
1443 f->private_data = i->i_private;
1444 return 0;
1445 }
1446
1447 static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u,
1448 size_t s, loff_t *off)
1449 {
1450 struct picolcd_data *data = f->private_data;
1451 struct picolcd_pending *resp;
1452 u8 raw_data[3];
1453 ssize_t ret = -EIO;
1454
1455 if (s == 0)
1456 return -EINVAL;
1457 if (*off > 0x0ff)
1458 return 0;
1459
1460 /* prepare buffer with info about what we want to read (addr & len) */
1461 raw_data[0] = *off & 0xff;
1462 raw_data[1] = (*off >> 8) && 0xff;
1463 raw_data[2] = s < 20 ? s : 20;
1464 if (*off + raw_data[2] > 0xff)
1465 raw_data[2] = 0x100 - *off;
1466 resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data,
1467 sizeof(raw_data));
1468 if (!resp)
1469 return -EIO;
1470
1471 if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
1472 /* successful read :) */
1473 ret = resp->raw_data[2];
1474 if (ret > s)
1475 ret = s;
1476 if (copy_to_user(u, resp->raw_data+3, ret))
1477 ret = -EFAULT;
1478 else
1479 *off += ret;
1480 } /* anything else is some kind of IO error */
1481
1482 kfree(resp);
1483 return ret;
1484 }
1485
1486 static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u,
1487 size_t s, loff_t *off)
1488 {
1489 struct picolcd_data *data = f->private_data;
1490 struct picolcd_pending *resp;
1491 ssize_t ret = -EIO;
1492 u8 raw_data[23];
1493
1494 if (s == 0)
1495 return -EINVAL;
1496 if (*off > 0x0ff)
1497 return -ENOSPC;
1498
1499 memset(raw_data, 0, sizeof(raw_data));
1500 raw_data[0] = *off & 0xff;
1501 raw_data[1] = (*off >> 8) && 0xff;
1502 raw_data[2] = s < 20 ? s : 20;
1503 if (*off + raw_data[2] > 0xff)
1504 raw_data[2] = 0x100 - *off;
1505
1506 if (copy_from_user(raw_data+3, u, raw_data[2]))
1507 return -EFAULT;
1508 resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data,
1509 sizeof(raw_data));
1510
1511 if (!resp)
1512 return -EIO;
1513
1514 if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
1515 /* check if written data matches */
1516 if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) {
1517 *off += raw_data[2];
1518 ret = raw_data[2];
1519 }
1520 }
1521 kfree(resp);
1522 return ret;
1523 }
1524
1525 /*
1526 * Notes:
1527 * - read/write happens in chunks of at most 20 bytes, it's up to userspace
1528 * to loop in order to get more data.
1529 * - on write errors on otherwise correct write request the bytes
1530 * that should have been written are in undefined state.
1531 */
1532 static const struct file_operations picolcd_debug_eeprom_fops = {
1533 .owner = THIS_MODULE,
1534 .open = picolcd_debug_eeprom_open,
1535 .read = picolcd_debug_eeprom_read,
1536 .write = picolcd_debug_eeprom_write,
1537 .llseek = generic_file_llseek,
1538 };
1539
1540 /*
1541 * The "flash" file
1542 */
1543 static int picolcd_debug_flash_open(struct inode *i, struct file *f)
1544 {
1545 f->private_data = i->i_private;
1546 return 0;
1547 }
1548
1549 /* record a flash address to buf (bounds check to be done by caller) */
1550 static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off)
1551 {
1552 buf[0] = off & 0xff;
1553 buf[1] = (off >> 8) & 0xff;
1554 if (data->addr_sz == 3)
1555 buf[2] = (off >> 16) & 0xff;
1556 return data->addr_sz == 2 ? 2 : 3;
1557 }
1558
1559 /* read a given size of data (bounds check to be done by caller) */
1560 static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id,
1561 char __user *u, size_t s, loff_t *off)
1562 {
1563 struct picolcd_pending *resp;
1564 u8 raw_data[4];
1565 ssize_t ret = 0;
1566 int len_off, err = -EIO;
1567
1568 while (s > 0) {
1569 err = -EIO;
1570 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1571 raw_data[len_off] = s > 32 ? 32 : s;
1572 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1);
1573 if (!resp || !resp->in_report)
1574 goto skip;
1575 if (resp->in_report->id == REPORT_MEMORY ||
1576 resp->in_report->id == REPORT_BL_READ_MEMORY) {
1577 if (memcmp(raw_data, resp->raw_data, len_off+1) != 0)
1578 goto skip;
1579 if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) {
1580 err = -EFAULT;
1581 goto skip;
1582 }
1583 *off += raw_data[len_off];
1584 s -= raw_data[len_off];
1585 ret += raw_data[len_off];
1586 err = 0;
1587 }
1588 skip:
1589 kfree(resp);
1590 if (err)
1591 return ret > 0 ? ret : err;
1592 }
1593 return ret;
1594 }
1595
1596 static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u,
1597 size_t s, loff_t *off)
1598 {
1599 struct picolcd_data *data = f->private_data;
1600
1601 if (s == 0)
1602 return -EINVAL;
1603 if (*off > 0x05fff)
1604 return 0;
1605 if (*off + s > 0x05fff)
1606 s = 0x06000 - *off;
1607
1608 if (data->status & PICOLCD_BOOTLOADER)
1609 return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off);
1610 else
1611 return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off);
1612 }
1613
1614 /* erase block aligned to 64bytes boundary */
1615 static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id,
1616 loff_t *off)
1617 {
1618 struct picolcd_pending *resp;
1619 u8 raw_data[3];
1620 int len_off;
1621 ssize_t ret = -EIO;
1622
1623 if (*off & 0x3f)
1624 return -EINVAL;
1625
1626 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1627 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off);
1628 if (!resp || !resp->in_report)
1629 goto skip;
1630 if (resp->in_report->id == REPORT_MEMORY ||
1631 resp->in_report->id == REPORT_BL_ERASE_MEMORY) {
1632 if (memcmp(raw_data, resp->raw_data, len_off) != 0)
1633 goto skip;
1634 ret = 0;
1635 }
1636 skip:
1637 kfree(resp);
1638 return ret;
1639 }
1640
1641 /* write a given size of data (bounds check to be done by caller) */
1642 static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id,
1643 const char __user *u, size_t s, loff_t *off)
1644 {
1645 struct picolcd_pending *resp;
1646 u8 raw_data[36];
1647 ssize_t ret = 0;
1648 int len_off, err = -EIO;
1649
1650 while (s > 0) {
1651 err = -EIO;
1652 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1653 raw_data[len_off] = s > 32 ? 32 : s;
1654 if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) {
1655 err = -EFAULT;
1656 break;
1657 }
1658 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data,
1659 len_off+1+raw_data[len_off]);
1660 if (!resp || !resp->in_report)
1661 goto skip;
1662 if (resp->in_report->id == REPORT_MEMORY ||
1663 resp->in_report->id == REPORT_BL_WRITE_MEMORY) {
1664 if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0)
1665 goto skip;
1666 *off += raw_data[len_off];
1667 s -= raw_data[len_off];
1668 ret += raw_data[len_off];
1669 err = 0;
1670 }
1671 skip:
1672 kfree(resp);
1673 if (err)
1674 break;
1675 }
1676 return ret > 0 ? ret : err;
1677 }
1678
1679 static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u,
1680 size_t s, loff_t *off)
1681 {
1682 struct picolcd_data *data = f->private_data;
1683 ssize_t err, ret = 0;
1684 int report_erase, report_write;
1685
1686 if (s == 0)
1687 return -EINVAL;
1688 if (*off > 0x5fff)
1689 return -ENOSPC;
1690 if (s & 0x3f)
1691 return -EINVAL;
1692 if (*off & 0x3f)
1693 return -EINVAL;
1694
1695 if (data->status & PICOLCD_BOOTLOADER) {
1696 report_erase = REPORT_BL_ERASE_MEMORY;
1697 report_write = REPORT_BL_WRITE_MEMORY;
1698 } else {
1699 report_erase = REPORT_ERASE_MEMORY;
1700 report_write = REPORT_WRITE_MEMORY;
1701 }
1702 mutex_lock(&data->mutex_flash);
1703 while (s > 0) {
1704 err = _picolcd_flash_erase64(data, report_erase, off);
1705 if (err)
1706 break;
1707 err = _picolcd_flash_write(data, report_write, u, 64, off);
1708 if (err < 0)
1709 break;
1710 ret += err;
1711 *off += err;
1712 s -= err;
1713 if (err != 64)
1714 break;
1715 }
1716 mutex_unlock(&data->mutex_flash);
1717 return ret > 0 ? ret : err;
1718 }
1719
1720 /*
1721 * Notes:
1722 * - concurrent writing is prevented by mutex and all writes must be
1723 * n*64 bytes and 64-byte aligned, each write being preceeded by an
1724 * ERASE which erases a 64byte block.
1725 * If less than requested was written or an error is returned for an
1726 * otherwise correct write request the next 64-byte block which should
1727 * have been written is in undefined state (mostly: original, erased,
1728 * (half-)written with write error)
1729 * - reading can happend without special restriction
1730 */
1731 static const struct file_operations picolcd_debug_flash_fops = {
1732 .owner = THIS_MODULE,
1733 .open = picolcd_debug_flash_open,
1734 .read = picolcd_debug_flash_read,
1735 .write = picolcd_debug_flash_write,
1736 .llseek = generic_file_llseek,
1737 };
1738
1739
1740 /*
1741 * Helper code for HID report level dumping/debugging
1742 */
1743 static const char *error_codes[] = {
1744 "success", "parameter missing", "data_missing", "block readonly",
1745 "block not erasable", "block too big", "section overflow",
1746 "invalid command length", "invalid data length",
1747 };
1748
1749 static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data,
1750 const size_t data_len)
1751 {
1752 int i, j;
1753 for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) {
1754 dst[j++] = hex_asc[(data[i] >> 4) & 0x0f];
1755 dst[j++] = hex_asc[data[i] & 0x0f];
1756 dst[j++] = ' ';
1757 }
1758 if (j < dst_sz) {
1759 dst[j--] = '\0';
1760 dst[j] = '\n';
1761 } else
1762 dst[j] = '\0';
1763 }
1764
1765 static void picolcd_debug_out_report(struct picolcd_data *data,
1766 struct hid_device *hdev, struct hid_report *report)
1767 {
1768 u8 raw_data[70];
1769 int raw_size = (report->size >> 3) + 1;
1770 char *buff;
1771 #define BUFF_SZ 256
1772
1773 /* Avoid unnecessary overhead if debugfs is disabled */
1774 if (!hdev->debug_events)
1775 return;
1776
1777 buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
1778 if (!buff)
1779 return;
1780
1781 snprintf(buff, BUFF_SZ, "\nout report %d (size %d) = ",
1782 report->id, raw_size);
1783 hid_debug_event(hdev, buff);
1784 if (raw_size + 5 > sizeof(raw_data)) {
1785 hid_debug_event(hdev, " TOO BIG\n");
1786 return;
1787 } else {
1788 raw_data[0] = report->id;
1789 hid_output_report(report, raw_data);
1790 dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size);
1791 hid_debug_event(hdev, buff);
1792 }
1793
1794 switch (report->id) {
1795 case REPORT_LED_STATE:
1796 /* 1 data byte with GPO state */
1797 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1798 "REPORT_LED_STATE", report->id, raw_size-1);
1799 hid_debug_event(hdev, buff);
1800 snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]);
1801 hid_debug_event(hdev, buff);
1802 break;
1803 case REPORT_BRIGHTNESS:
1804 /* 1 data byte with brightness */
1805 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1806 "REPORT_BRIGHTNESS", report->id, raw_size-1);
1807 hid_debug_event(hdev, buff);
1808 snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]);
1809 hid_debug_event(hdev, buff);
1810 break;
1811 case REPORT_CONTRAST:
1812 /* 1 data byte with contrast */
1813 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1814 "REPORT_CONTRAST", report->id, raw_size-1);
1815 hid_debug_event(hdev, buff);
1816 snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]);
1817 hid_debug_event(hdev, buff);
1818 break;
1819 case REPORT_RESET:
1820 /* 2 data bytes with reset duration in ms */
1821 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1822 "REPORT_RESET", report->id, raw_size-1);
1823 hid_debug_event(hdev, buff);
1824 snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n",
1825 raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]);
1826 hid_debug_event(hdev, buff);
1827 break;
1828 case REPORT_LCD_CMD:
1829 /* 63 data bytes with LCD commands */
1830 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1831 "REPORT_LCD_CMD", report->id, raw_size-1);
1832 hid_debug_event(hdev, buff);
1833 /* TODO: format decoding */
1834 break;
1835 case REPORT_LCD_DATA:
1836 /* 63 data bytes with LCD data */
1837 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1838 "REPORT_LCD_CMD", report->id, raw_size-1);
1839 /* TODO: format decoding */
1840 hid_debug_event(hdev, buff);
1841 break;
1842 case REPORT_LCD_CMD_DATA:
1843 /* 63 data bytes with LCD commands and data */
1844 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1845 "REPORT_LCD_CMD", report->id, raw_size-1);
1846 /* TODO: format decoding */
1847 hid_debug_event(hdev, buff);
1848 break;
1849 case REPORT_EE_READ:
1850 /* 3 data bytes with read area description */
1851 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1852 "REPORT_EE_READ", report->id, raw_size-1);
1853 hid_debug_event(hdev, buff);
1854 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1855 raw_data[2], raw_data[1]);
1856 hid_debug_event(hdev, buff);
1857 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
1858 hid_debug_event(hdev, buff);
1859 break;
1860 case REPORT_EE_WRITE:
1861 /* 3+1..20 data bytes with write area description */
1862 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1863 "REPORT_EE_WRITE", report->id, raw_size-1);
1864 hid_debug_event(hdev, buff);
1865 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1866 raw_data[2], raw_data[1]);
1867 hid_debug_event(hdev, buff);
1868 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
1869 hid_debug_event(hdev, buff);
1870 if (raw_data[3] == 0) {
1871 snprintf(buff, BUFF_SZ, "\tNo data\n");
1872 } else if (raw_data[3] + 4 <= raw_size) {
1873 snprintf(buff, BUFF_SZ, "\tData: ");
1874 hid_debug_event(hdev, buff);
1875 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
1876 } else {
1877 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
1878 }
1879 hid_debug_event(hdev, buff);
1880 break;
1881 case REPORT_ERASE_MEMORY:
1882 case REPORT_BL_ERASE_MEMORY:
1883 /* 3 data bytes with pointer inside erase block */
1884 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1885 "REPORT_ERASE_MEMORY", report->id, raw_size-1);
1886 hid_debug_event(hdev, buff);
1887 switch (data->addr_sz) {
1888 case 2:
1889 snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n",
1890 raw_data[2], raw_data[1]);
1891 break;
1892 case 3:
1893 snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n",
1894 raw_data[3], raw_data[2], raw_data[1]);
1895 break;
1896 default:
1897 snprintf(buff, BUFF_SZ, "\tNot supported\n");
1898 }
1899 hid_debug_event(hdev, buff);
1900 break;
1901 case REPORT_READ_MEMORY:
1902 case REPORT_BL_READ_MEMORY:
1903 /* 4 data bytes with read area description */
1904 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1905 "REPORT_READ_MEMORY", report->id, raw_size-1);
1906 hid_debug_event(hdev, buff);
1907 switch (data->addr_sz) {
1908 case 2:
1909 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1910 raw_data[2], raw_data[1]);
1911 hid_debug_event(hdev, buff);
1912 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
1913 break;
1914 case 3:
1915 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
1916 raw_data[3], raw_data[2], raw_data[1]);
1917 hid_debug_event(hdev, buff);
1918 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
1919 break;
1920 default:
1921 snprintf(buff, BUFF_SZ, "\tNot supported\n");
1922 }
1923 hid_debug_event(hdev, buff);
1924 break;
1925 case REPORT_WRITE_MEMORY:
1926 case REPORT_BL_WRITE_MEMORY:
1927 /* 4+1..32 data bytes with write adrea description */
1928 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1929 "REPORT_WRITE_MEMORY", report->id, raw_size-1);
1930 hid_debug_event(hdev, buff);
1931 switch (data->addr_sz) {
1932 case 2:
1933 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1934 raw_data[2], raw_data[1]);
1935 hid_debug_event(hdev, buff);
1936 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
1937 hid_debug_event(hdev, buff);
1938 if (raw_data[3] == 0) {
1939 snprintf(buff, BUFF_SZ, "\tNo data\n");
1940 } else if (raw_data[3] + 4 <= raw_size) {
1941 snprintf(buff, BUFF_SZ, "\tData: ");
1942 hid_debug_event(hdev, buff);
1943 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
1944 } else {
1945 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
1946 }
1947 break;
1948 case 3:
1949 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
1950 raw_data[3], raw_data[2], raw_data[1]);
1951 hid_debug_event(hdev, buff);
1952 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
1953 hid_debug_event(hdev, buff);
1954 if (raw_data[4] == 0) {
1955 snprintf(buff, BUFF_SZ, "\tNo data\n");
1956 } else if (raw_data[4] + 5 <= raw_size) {
1957 snprintf(buff, BUFF_SZ, "\tData: ");
1958 hid_debug_event(hdev, buff);
1959 dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
1960 } else {
1961 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
1962 }
1963 break;
1964 default:
1965 snprintf(buff, BUFF_SZ, "\tNot supported\n");
1966 }
1967 hid_debug_event(hdev, buff);
1968 break;
1969 case REPORT_SPLASH_RESTART:
1970 /* TODO */
1971 break;
1972 case REPORT_EXIT_KEYBOARD:
1973 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1974 "REPORT_EXIT_KEYBOARD", report->id, raw_size-1);
1975 hid_debug_event(hdev, buff);
1976 snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
1977 raw_data[1] | (raw_data[2] << 8),
1978 raw_data[2], raw_data[1]);
1979 hid_debug_event(hdev, buff);
1980 break;
1981 case REPORT_VERSION:
1982 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1983 "REPORT_VERSION", report->id, raw_size-1);
1984 hid_debug_event(hdev, buff);
1985 break;
1986 case REPORT_DEVID:
1987 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1988 "REPORT_DEVID", report->id, raw_size-1);
1989 hid_debug_event(hdev, buff);
1990 break;
1991 case REPORT_SPLASH_SIZE:
1992 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1993 "REPORT_SPLASH_SIZE", report->id, raw_size-1);
1994 hid_debug_event(hdev, buff);
1995 break;
1996 case REPORT_HOOK_VERSION:
1997 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1998 "REPORT_HOOK_VERSION", report->id, raw_size-1);
1999 hid_debug_event(hdev, buff);
2000 break;
2001 case REPORT_EXIT_FLASHER:
2002 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2003 "REPORT_VERSION", report->id, raw_size-1);
2004 hid_debug_event(hdev, buff);
2005 snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
2006 raw_data[1] | (raw_data[2] << 8),
2007 raw_data[2], raw_data[1]);
2008 hid_debug_event(hdev, buff);
2009 break;
2010 default:
2011 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2012 "<unknown>", report->id, raw_size-1);
2013 hid_debug_event(hdev, buff);
2014 break;
2015 }
2016 wake_up_interruptible(&hdev->debug_wait);
2017 kfree(buff);
2018 }
2019
2020 static void picolcd_debug_raw_event(struct picolcd_data *data,
2021 struct hid_device *hdev, struct hid_report *report,
2022 u8 *raw_data, int size)
2023 {
2024 char *buff;
2025
2026 #define BUFF_SZ 256
2027 /* Avoid unnecessary overhead if debugfs is disabled */
2028 if (!hdev->debug_events)
2029 return;
2030
2031 buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
2032 if (!buff)
2033 return;
2034
2035 switch (report->id) {
2036 case REPORT_ERROR_CODE:
2037 /* 2 data bytes with affected report and error code */
2038 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2039 "REPORT_ERROR_CODE", report->id, size-1);
2040 hid_debug_event(hdev, buff);
2041 if (raw_data[2] < ARRAY_SIZE(error_codes))
2042 snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n",
2043 raw_data[2], error_codes[raw_data[2]], raw_data[1]);
2044 else
2045 snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n",
2046 raw_data[2], raw_data[1]);
2047 hid_debug_event(hdev, buff);
2048 break;
2049 case REPORT_KEY_STATE:
2050 /* 2 data bytes with key state */
2051 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2052 "REPORT_KEY_STATE", report->id, size-1);
2053 hid_debug_event(hdev, buff);
2054 if (raw_data[1] == 0)
2055 snprintf(buff, BUFF_SZ, "\tNo key pressed\n");
2056 else if (raw_data[2] == 0)
2057 snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n",
2058 raw_data[1], raw_data[1]);
2059 else
2060 snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n",
2061 raw_data[1], raw_data[1], raw_data[2], raw_data[2]);
2062 hid_debug_event(hdev, buff);
2063 break;
2064 case REPORT_IR_DATA:
2065 /* Up to 20 byes of IR scancode data */
2066 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2067 "REPORT_IR_DATA", report->id, size-1);
2068 hid_debug_event(hdev, buff);
2069 if (raw_data[1] == 0) {
2070 snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n");
2071 hid_debug_event(hdev, buff);
2072 } else if (raw_data[1] + 1 <= size) {
2073 snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ",
2074 raw_data[1]-1);
2075 hid_debug_event(hdev, buff);
2076 dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1);
2077 hid_debug_event(hdev, buff);
2078 } else {
2079 snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n",
2080 raw_data[1]-1);
2081 hid_debug_event(hdev, buff);
2082 }
2083 break;
2084 case REPORT_EE_DATA:
2085 /* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */
2086 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2087 "REPORT_EE_DATA", report->id, size-1);
2088 hid_debug_event(hdev, buff);
2089 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
2090 raw_data[2], raw_data[1]);
2091 hid_debug_event(hdev, buff);
2092 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2093 hid_debug_event(hdev, buff);
2094 if (raw_data[3] == 0) {
2095 snprintf(buff, BUFF_SZ, "\tNo data\n");
2096 hid_debug_event(hdev, buff);
2097 } else if (raw_data[3] + 4 <= size) {
2098 snprintf(buff, BUFF_SZ, "\tData: ");
2099 hid_debug_event(hdev, buff);
2100 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
2101 hid_debug_event(hdev, buff);
2102 } else {
2103 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2104 hid_debug_event(hdev, buff);
2105 }
2106 break;
2107 case REPORT_MEMORY:
2108 /* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */
2109 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2110 "REPORT_MEMORY", report->id, size-1);
2111 hid_debug_event(hdev, buff);
2112 switch (data->addr_sz) {
2113 case 2:
2114 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
2115 raw_data[2], raw_data[1]);
2116 hid_debug_event(hdev, buff);
2117 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2118 hid_debug_event(hdev, buff);
2119 if (raw_data[3] == 0) {
2120 snprintf(buff, BUFF_SZ, "\tNo data\n");
2121 } else if (raw_data[3] + 4 <= size) {
2122 snprintf(buff, BUFF_SZ, "\tData: ");
2123 hid_debug_event(hdev, buff);
2124 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
2125 } else {
2126 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2127 }
2128 break;
2129 case 3:
2130 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
2131 raw_data[3], raw_data[2], raw_data[1]);
2132 hid_debug_event(hdev, buff);
2133 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
2134 hid_debug_event(hdev, buff);
2135 if (raw_data[4] == 0) {
2136 snprintf(buff, BUFF_SZ, "\tNo data\n");
2137 } else if (raw_data[4] + 5 <= size) {
2138 snprintf(buff, BUFF_SZ, "\tData: ");
2139 hid_debug_event(hdev, buff);
2140 dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
2141 } else {
2142 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2143 }
2144 break;
2145 default:
2146 snprintf(buff, BUFF_SZ, "\tNot supported\n");
2147 }
2148 hid_debug_event(hdev, buff);
2149 break;
2150 case REPORT_VERSION:
2151 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2152 "REPORT_VERSION", report->id, size-1);
2153 hid_debug_event(hdev, buff);
2154 snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
2155 raw_data[2], raw_data[1]);
2156 hid_debug_event(hdev, buff);
2157 break;
2158 case REPORT_BL_ERASE_MEMORY:
2159 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2160 "REPORT_BL_ERASE_MEMORY", report->id, size-1);
2161 hid_debug_event(hdev, buff);
2162 /* TODO */
2163 break;
2164 case REPORT_BL_READ_MEMORY:
2165 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2166 "REPORT_BL_READ_MEMORY", report->id, size-1);
2167 hid_debug_event(hdev, buff);
2168 /* TODO */
2169 break;
2170 case REPORT_BL_WRITE_MEMORY:
2171 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2172 "REPORT_BL_WRITE_MEMORY", report->id, size-1);
2173 hid_debug_event(hdev, buff);
2174 /* TODO */
2175 break;
2176 case REPORT_DEVID:
2177 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2178 "REPORT_DEVID", report->id, size-1);
2179 hid_debug_event(hdev, buff);
2180 snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n",
2181 raw_data[1], raw_data[2], raw_data[3], raw_data[4]);
2182 hid_debug_event(hdev, buff);
2183 snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n",
2184 raw_data[5]);
2185 hid_debug_event(hdev, buff);
2186 break;
2187 case REPORT_SPLASH_SIZE:
2188 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2189 "REPORT_SPLASH_SIZE", report->id, size-1);
2190 hid_debug_event(hdev, buff);
2191 snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n",
2192 (raw_data[2] << 8) | raw_data[1]);
2193 hid_debug_event(hdev, buff);
2194 snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n",
2195 (raw_data[4] << 8) | raw_data[3]);
2196 hid_debug_event(hdev, buff);
2197 break;
2198 case REPORT_HOOK_VERSION:
2199 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2200 "REPORT_HOOK_VERSION", report->id, size-1);
2201 hid_debug_event(hdev, buff);
2202 snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
2203 raw_data[1], raw_data[2]);
2204 hid_debug_event(hdev, buff);
2205 break;
2206 default:
2207 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2208 "<unknown>", report->id, size-1);
2209 hid_debug_event(hdev, buff);
2210 break;
2211 }
2212 wake_up_interruptible(&hdev->debug_wait);
2213 kfree(buff);
2214 }
2215
2216 static void picolcd_init_devfs(struct picolcd_data *data,
2217 struct hid_report *eeprom_r, struct hid_report *eeprom_w,
2218 struct hid_report *flash_r, struct hid_report *flash_w,
2219 struct hid_report *reset)
2220 {
2221 struct hid_device *hdev = data->hdev;
2222
2223 mutex_init(&data->mutex_flash);
2224
2225 /* reset */
2226 if (reset)
2227 data->debug_reset = debugfs_create_file("reset", 0600,
2228 hdev->debug_dir, data, &picolcd_debug_reset_fops);
2229
2230 /* eeprom */
2231 if (eeprom_r || eeprom_w)
2232 data->debug_eeprom = debugfs_create_file("eeprom",
2233 (eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0),
2234 hdev->debug_dir, data, &picolcd_debug_eeprom_fops);
2235
2236 /* flash */
2237 if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8)
2238 data->addr_sz = flash_r->field[0]->report_count - 1;
2239 else
2240 data->addr_sz = -1;
2241 if (data->addr_sz == 2 || data->addr_sz == 3) {
2242 data->debug_flash = debugfs_create_file("flash",
2243 (flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0),
2244 hdev->debug_dir, data, &picolcd_debug_flash_fops);
2245 } else if (flash_r || flash_w)
2246 dev_warn(&hdev->dev, "Unexpected FLASH access reports, "
2247 "please submit rdesc for review\n");
2248 }
2249
2250 static void picolcd_exit_devfs(struct picolcd_data *data)
2251 {
2252 struct dentry *dent;
2253
2254 dent = data->debug_reset;
2255 data->debug_reset = NULL;
2256 if (dent)
2257 debugfs_remove(dent);
2258 dent = data->debug_eeprom;
2259 data->debug_eeprom = NULL;
2260 if (dent)
2261 debugfs_remove(dent);
2262 dent = data->debug_flash;
2263 data->debug_flash = NULL;
2264 if (dent)
2265 debugfs_remove(dent);
2266 mutex_destroy(&data->mutex_flash);
2267 }
2268 #else
2269 static inline void picolcd_debug_raw_event(struct picolcd_data *data,
2270 struct hid_device *hdev, struct hid_report *report,
2271 u8 *raw_data, int size)
2272 {
2273 }
2274 static inline void picolcd_init_devfs(struct picolcd_data *data,
2275 struct hid_report *eeprom_r, struct hid_report *eeprom_w,
2276 struct hid_report *flash_r, struct hid_report *flash_w,
2277 struct hid_report *reset)
2278 {
2279 }
2280 static inline void picolcd_exit_devfs(struct picolcd_data *data)
2281 {
2282 }
2283 #endif /* CONFIG_DEBUG_FS */
2284
2285 /*
2286 * Handle raw report as sent by device
2287 */
2288 static int picolcd_raw_event(struct hid_device *hdev,
2289 struct hid_report *report, u8 *raw_data, int size)
2290 {
2291 struct picolcd_data *data = hid_get_drvdata(hdev);
2292 unsigned long flags;
2293 int ret = 0;
2294
2295 if (!data)
2296 return 1;
2297
2298 if (report->id == REPORT_KEY_STATE) {
2299 if (data->input_keys)
2300 ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
2301 } else if (report->id == REPORT_IR_DATA) {
2302 if (data->input_cir)
2303 ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
2304 } else {
2305 spin_lock_irqsave(&data->lock, flags);
2306 /*
2307 * We let the caller of picolcd_send_and_wait() check if the
2308 * report we got is one of the expected ones or not.
2309 */
2310 if (data->pending) {
2311 memcpy(data->pending->raw_data, raw_data+1, size-1);
2312 data->pending->raw_size = size-1;
2313 data->pending->in_report = report;
2314 complete(&data->pending->ready);
2315 }
2316 spin_unlock_irqrestore(&data->lock, flags);
2317 }
2318
2319 picolcd_debug_raw_event(data, hdev, report, raw_data, size);
2320 return 1;
2321 }
2322
2323 #ifdef CONFIG_PM
2324 static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
2325 {
2326 if (message.event & PM_EVENT_AUTO)
2327 return 0;
2328
2329 picolcd_suspend_backlight(hid_get_drvdata(hdev));
2330 dbg_hid(PICOLCD_NAME " device ready for suspend\n");
2331 return 0;
2332 }
2333
2334 static int picolcd_resume(struct hid_device *hdev)
2335 {
2336 int ret;
2337 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
2338 if (ret)
2339 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
2340 return 0;
2341 }
2342
2343 static int picolcd_reset_resume(struct hid_device *hdev)
2344 {
2345 int ret;
2346 ret = picolcd_reset(hdev);
2347 if (ret)
2348 dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
2349 ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
2350 if (ret)
2351 dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
2352 ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
2353 if (ret)
2354 dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
2355 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
2356 if (ret)
2357 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
2358 picolcd_leds_set(hid_get_drvdata(hdev));
2359 return 0;
2360 }
2361 #endif
2362
2363 /* initialize keypad input device */
2364 static int picolcd_init_keys(struct picolcd_data *data,
2365 struct hid_report *report)
2366 {
2367 struct hid_device *hdev = data->hdev;
2368 struct input_dev *idev;
2369 int error, i;
2370
2371 if (!report)
2372 return -ENODEV;
2373 if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
2374 report->field[0]->report_size != 8) {
2375 dev_err(&hdev->dev, "unsupported KEY_STATE report");
2376 return -EINVAL;
2377 }
2378
2379 idev = input_allocate_device();
2380 if (idev == NULL) {
2381 dev_err(&hdev->dev, "failed to allocate input device");
2382 return -ENOMEM;
2383 }
2384 input_set_drvdata(idev, hdev);
2385 memcpy(data->keycode, def_keymap, sizeof(def_keymap));
2386 idev->name = hdev->name;
2387 idev->phys = hdev->phys;
2388 idev->uniq = hdev->uniq;
2389 idev->id.bustype = hdev->bus;
2390 idev->id.vendor = hdev->vendor;
2391 idev->id.product = hdev->product;
2392 idev->id.version = hdev->version;
2393 idev->dev.parent = hdev->dev.parent;
2394 idev->keycode = &data->keycode;
2395 idev->keycodemax = PICOLCD_KEYS;
2396 idev->keycodesize = sizeof(data->keycode[0]);
2397 input_set_capability(idev, EV_MSC, MSC_SCAN);
2398 set_bit(EV_REP, idev->evbit);
2399 for (i = 0; i < PICOLCD_KEYS; i++)
2400 input_set_capability(idev, EV_KEY, data->keycode[i]);
2401 error = input_register_device(idev);
2402 if (error) {
2403 dev_err(&hdev->dev, "error registering the input device");
2404 input_free_device(idev);
2405 return error;
2406 }
2407 data->input_keys = idev;
2408 return 0;
2409 }
2410
2411 static void picolcd_exit_keys(struct picolcd_data *data)
2412 {
2413 struct input_dev *idev = data->input_keys;
2414
2415 data->input_keys = NULL;
2416 if (idev)
2417 input_unregister_device(idev);
2418 }
2419
2420 /* initialize CIR input device */
2421 static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
2422 {
2423 /* support not implemented yet */
2424 return 0;
2425 }
2426
2427 static inline void picolcd_exit_cir(struct picolcd_data *data)
2428 {
2429 }
2430
2431 static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
2432 {
2433 int error;
2434
2435 error = picolcd_check_version(hdev);
2436 if (error)
2437 return error;
2438
2439 if (data->version[0] != 0 && data->version[1] != 3)
2440 dev_info(&hdev->dev, "Device with untested firmware revision, "
2441 "please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
2442 dev_name(&hdev->dev));
2443
2444 /* Setup keypad input device */
2445 error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
2446 if (error)
2447 goto err;
2448
2449 /* Setup CIR input device */
2450 error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
2451 if (error)
2452 goto err;
2453
2454 /* Set up the framebuffer device */
2455 error = picolcd_init_framebuffer(data);
2456 if (error)
2457 goto err;
2458
2459 /* Setup lcd class device */
2460 error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
2461 if (error)
2462 goto err;
2463
2464 /* Setup backlight class device */
2465 error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
2466 if (error)
2467 goto err;
2468
2469 /* Setup the LED class devices */
2470 error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
2471 if (error)
2472 goto err;
2473
2474 picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
2475 picolcd_out_report(REPORT_EE_WRITE, hdev),
2476 picolcd_out_report(REPORT_READ_MEMORY, hdev),
2477 picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
2478 picolcd_out_report(REPORT_RESET, hdev));
2479 return 0;
2480 err:
2481 picolcd_exit_leds(data);
2482 picolcd_exit_backlight(data);
2483 picolcd_exit_lcd(data);
2484 picolcd_exit_framebuffer(data);
2485 picolcd_exit_cir(data);
2486 picolcd_exit_keys(data);
2487 return error;
2488 }
2489
2490 static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
2491 {
2492 int error;
2493
2494 error = picolcd_check_version(hdev);
2495 if (error)
2496 return error;
2497
2498 if (data->version[0] != 1 && data->version[1] != 0)
2499 dev_info(&hdev->dev, "Device with untested bootloader revision, "
2500 "please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
2501 dev_name(&hdev->dev));
2502
2503 picolcd_init_devfs(data, NULL, NULL,
2504 picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
2505 picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
2506 return 0;
2507 }
2508
2509 static int picolcd_probe(struct hid_device *hdev,
2510 const struct hid_device_id *id)
2511 {
2512 struct picolcd_data *data;
2513 int error = -ENOMEM;
2514
2515 dbg_hid(PICOLCD_NAME " hardware probe...\n");
2516
2517 /*
2518 * Let's allocate the picolcd data structure, set some reasonable
2519 * defaults, and associate it with the device
2520 */
2521 data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
2522 if (data == NULL) {
2523 dev_err(&hdev->dev, "can't allocate space for Minibox PicoLCD device data\n");
2524 error = -ENOMEM;
2525 goto err_no_cleanup;
2526 }
2527
2528 spin_lock_init(&data->lock);
2529 mutex_init(&data->mutex);
2530 data->hdev = hdev;
2531 data->opmode_delay = 5000;
2532 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
2533 data->status |= PICOLCD_BOOTLOADER;
2534 hid_set_drvdata(hdev, data);
2535
2536 /* Parse the device reports and start it up */
2537 error = hid_parse(hdev);
2538 if (error) {
2539 dev_err(&hdev->dev, "device report parse failed\n");
2540 goto err_cleanup_data;
2541 }
2542
2543 /* We don't use hidinput but hid_hw_start() fails if nothing is
2544 * claimed. So spoof claimed input. */
2545 hdev->claimed = HID_CLAIMED_INPUT;
2546 error = hid_hw_start(hdev, 0);
2547 hdev->claimed = 0;
2548 if (error) {
2549 dev_err(&hdev->dev, "hardware start failed\n");
2550 goto err_cleanup_data;
2551 }
2552
2553 error = hdev->ll_driver->open(hdev);
2554 if (error) {
2555 dev_err(&hdev->dev, "failed to open input interrupt pipe for key and IR events\n");
2556 goto err_cleanup_hid_hw;
2557 }
2558
2559 error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
2560 if (error) {
2561 dev_err(&hdev->dev, "failed to create sysfs attributes\n");
2562 goto err_cleanup_hid_ll;
2563 }
2564
2565 error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
2566 if (error) {
2567 dev_err(&hdev->dev, "failed to create sysfs attributes\n");
2568 goto err_cleanup_sysfs1;
2569 }
2570
2571 if (data->status & PICOLCD_BOOTLOADER)
2572 error = picolcd_probe_bootloader(hdev, data);
2573 else
2574 error = picolcd_probe_lcd(hdev, data);
2575 if (error)
2576 goto err_cleanup_sysfs2;
2577
2578 dbg_hid(PICOLCD_NAME " activated and initialized\n");
2579 return 0;
2580
2581 err_cleanup_sysfs2:
2582 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
2583 err_cleanup_sysfs1:
2584 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
2585 err_cleanup_hid_ll:
2586 hdev->ll_driver->close(hdev);
2587 err_cleanup_hid_hw:
2588 hid_hw_stop(hdev);
2589 err_cleanup_data:
2590 kfree(data);
2591 err_no_cleanup:
2592 hid_set_drvdata(hdev, NULL);
2593
2594 return error;
2595 }
2596
2597 static void picolcd_remove(struct hid_device *hdev)
2598 {
2599 struct picolcd_data *data = hid_get_drvdata(hdev);
2600 unsigned long flags;
2601
2602 dbg_hid(PICOLCD_NAME " hardware remove...\n");
2603 spin_lock_irqsave(&data->lock, flags);
2604 data->status |= PICOLCD_FAILED;
2605 spin_unlock_irqrestore(&data->lock, flags);
2606
2607 picolcd_exit_devfs(data);
2608 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
2609 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
2610 hdev->ll_driver->close(hdev);
2611 hid_hw_stop(hdev);
2612 hid_set_drvdata(hdev, NULL);
2613
2614 /* Shortcut potential pending reply that will never arrive */
2615 spin_lock_irqsave(&data->lock, flags);
2616 if (data->pending)
2617 complete(&data->pending->ready);
2618 spin_unlock_irqrestore(&data->lock, flags);
2619
2620 /* Cleanup LED */
2621 picolcd_exit_leds(data);
2622 /* Clean up the framebuffer */
2623 picolcd_exit_backlight(data);
2624 picolcd_exit_lcd(data);
2625 picolcd_exit_framebuffer(data);
2626 /* Cleanup input */
2627 picolcd_exit_cir(data);
2628 picolcd_exit_keys(data);
2629
2630 mutex_destroy(&data->mutex);
2631 /* Finally, clean up the picolcd data itself */
2632 kfree(data);
2633 }
2634
2635 static const struct hid_device_id picolcd_devices[] = {
2636 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
2637 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
2638 { }
2639 };
2640 MODULE_DEVICE_TABLE(hid, picolcd_devices);
2641
2642 static struct hid_driver picolcd_driver = {
2643 .name = "hid-picolcd",
2644 .id_table = picolcd_devices,
2645 .probe = picolcd_probe,
2646 .remove = picolcd_remove,
2647 .raw_event = picolcd_raw_event,
2648 #ifdef CONFIG_PM
2649 .suspend = picolcd_suspend,
2650 .resume = picolcd_resume,
2651 .reset_resume = picolcd_reset_resume,
2652 #endif
2653 };
2654
2655 static int __init picolcd_init(void)
2656 {
2657 return hid_register_driver(&picolcd_driver);
2658 }
2659
2660 static void __exit picolcd_exit(void)
2661 {
2662 hid_unregister_driver(&picolcd_driver);
2663 }
2664
2665 module_init(picolcd_init);
2666 module_exit(picolcd_exit);
2667 MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
2668 MODULE_LICENSE("GPL v2");
CJK support for tty framebuffer vt