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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 */
110static 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
121static 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 */
158static 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 */
181struct 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 */
190struct 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
247static 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 hid_warn(hdev, "No report with id 0x%x found\n", id);
257 return NULL;
258}
259
260#ifdef CONFIG_DEBUG_FS
261static 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 */
272static 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 */
314static 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*/
358static 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 */
396static 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 */
437static void picolcd_fb_update(struct picolcd_data *data)
438{
439 int chip, tile, n;
440 unsigned long flags;
441
442 if (!data)
443 return;
444
445 spin_lock_irqsave(&data->lock, flags);
446 if (!(data->status & PICOLCD_READY_FB)) {
447 spin_unlock_irqrestore(&data->lock, flags);
448 picolcd_fb_reset(data, 0);
449 } else {
450 spin_unlock_irqrestore(&data->lock, flags);
451 }
452
453 /*
454 * Translate the framebuffer into the format needed by the PicoLCD.
455 * See display layout above.
456 * Do this one tile after the other and push those tiles that changed.
457 *
458 * Wait for our IO to complete as otherwise we might flood the queue!
459 */
460 n = 0;
461 for (chip = 0; chip < 4; chip++)
462 for (tile = 0; tile < 8; tile++)
463 if (picolcd_fb_update_tile(data->fb_vbitmap,
464 data->fb_bitmap, data->fb_bpp, chip, tile) ||
465 data->fb_force) {
466 n += 2;
467 if (!data->fb_info->par)
468 return; /* device lost! */
469 if (n >= HID_OUTPUT_FIFO_SIZE / 2) {
470 usbhid_wait_io(data->hdev);
471 n = 0;
472 }
473 picolcd_fb_send_tile(data->hdev, chip, tile);
474 }
475 data->fb_force = false;
476 if (n)
477 usbhid_wait_io(data->hdev);
478}
479
480/* Stub to call the system default and update the image on the picoLCD */
481static void picolcd_fb_fillrect(struct fb_info *info,
482 const struct fb_fillrect *rect)
483{
484 if (!info->par)
485 return;
486 sys_fillrect(info, rect);
487
488 schedule_delayed_work(&info->deferred_work, 0);
489}
490
491/* Stub to call the system default and update the image on the picoLCD */
492static void picolcd_fb_copyarea(struct fb_info *info,
493 const struct fb_copyarea *area)
494{
495 if (!info->par)
496 return;
497 sys_copyarea(info, area);
498
499 schedule_delayed_work(&info->deferred_work, 0);
500}
501
502/* Stub to call the system default and update the image on the picoLCD */
503static void picolcd_fb_imageblit(struct fb_info *info, const struct fb_image *image)
504{
505 if (!info->par)
506 return;
507 sys_imageblit(info, image);
508
509 schedule_delayed_work(&info->deferred_work, 0);
510}
511
512/*
513 * this is the slow path from userspace. they can seek and write to
514 * the fb. it's inefficient to do anything less than a full screen draw
515 */
516static ssize_t picolcd_fb_write(struct fb_info *info, const char __user *buf,
517 size_t count, loff_t *ppos)
518{
519 ssize_t ret;
520 if (!info->par)
521 return -ENODEV;
522 ret = fb_sys_write(info, buf, count, ppos);
523 if (ret >= 0)
524 schedule_delayed_work(&info->deferred_work, 0);
525 return ret;
526}
527
528static int picolcd_fb_blank(int blank, struct fb_info *info)
529{
530 if (!info->par)
531 return -ENODEV;
532 /* We let fb notification do this for us via lcd/backlight device */
533 return 0;
534}
535
536static void picolcd_fb_destroy(struct fb_info *info)
537{
538 struct picolcd_data *data = info->par;
539 u32 *ref_cnt = info->pseudo_palette;
540 int may_release;
541
542 info->par = NULL;
543 if (data)
544 data->fb_info = NULL;
545 fb_deferred_io_cleanup(info);
546
547 ref_cnt--;
548 mutex_lock(&info->lock);
549 (*ref_cnt)--;
550 may_release = !*ref_cnt;
551 mutex_unlock(&info->lock);
552 if (may_release) {
553 vfree((u8 *)info->fix.smem_start);
554 framebuffer_release(info);
555 }
556}
557
558static int picolcd_fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
559{
560 __u32 bpp = var->bits_per_pixel;
561 __u32 activate = var->activate;
562
563 /* only allow 1/8 bit depth (8-bit is grayscale) */
564 *var = picolcdfb_var;
565 var->activate = activate;
566 if (bpp >= 8) {
567 var->bits_per_pixel = 8;
568 var->red.length = 8;
569 var->green.length = 8;
570 var->blue.length = 8;
571 } else {
572 var->bits_per_pixel = 1;
573 var->red.length = 1;
574 var->green.length = 1;
575 var->blue.length = 1;
576 }
577 return 0;
578}
579
580static int picolcd_set_par(struct fb_info *info)
581{
582 struct picolcd_data *data = info->par;
583 u8 *tmp_fb, *o_fb;
584 if (!data)
585 return -ENODEV;
586 if (info->var.bits_per_pixel == data->fb_bpp)
587 return 0;
588 /* switch between 1/8 bit depths */
589 if (info->var.bits_per_pixel != 1 && info->var.bits_per_pixel != 8)
590 return -EINVAL;
591
592 o_fb = data->fb_bitmap;
593 tmp_fb = kmalloc(PICOLCDFB_SIZE*info->var.bits_per_pixel, GFP_KERNEL);
594 if (!tmp_fb)
595 return -ENOMEM;
596
597 /* translate FB content to new bits-per-pixel */
598 if (info->var.bits_per_pixel == 1) {
599 int i, b;
600 for (i = 0; i < PICOLCDFB_SIZE; i++) {
601 u8 p = 0;
602 for (b = 0; b < 8; b++) {
603 p <<= 1;
604 p |= o_fb[i*8+b] ? 0x01 : 0x00;
605 }
606 tmp_fb[i] = p;
607 }
608 memcpy(o_fb, tmp_fb, PICOLCDFB_SIZE);
609 info->fix.visual = FB_VISUAL_MONO01;
610 info->fix.line_length = PICOLCDFB_WIDTH / 8;
611 } else {
612 int i;
613 memcpy(tmp_fb, o_fb, PICOLCDFB_SIZE);
614 for (i = 0; i < PICOLCDFB_SIZE * 8; i++)
615 o_fb[i] = tmp_fb[i/8] & (0x01 << (7 - i % 8)) ? 0xff : 0x00;
616 info->fix.visual = FB_VISUAL_DIRECTCOLOR;
617 info->fix.line_length = PICOLCDFB_WIDTH;
618 }
619
620 kfree(tmp_fb);
621 data->fb_bpp = info->var.bits_per_pixel;
622 return 0;
623}
624
625/* Do refcounting on our FB and cleanup per worker if FB is
626 * closed after unplug of our device
627 * (fb_release holds info->lock and still touches info after
628 * we return so we can't release it immediately.
629 */
630struct picolcd_fb_cleanup_item {
631 struct fb_info *info;
632 struct picolcd_fb_cleanup_item *next;
633};
634static struct picolcd_fb_cleanup_item *fb_pending;
635DEFINE_SPINLOCK(fb_pending_lock);
636
637static void picolcd_fb_do_cleanup(struct work_struct *data)
638{
639 struct picolcd_fb_cleanup_item *item;
640 unsigned long flags;
641
642 do {
643 spin_lock_irqsave(&fb_pending_lock, flags);
644 item = fb_pending;
645 fb_pending = item ? item->next : NULL;
646 spin_unlock_irqrestore(&fb_pending_lock, flags);
647
648 if (item) {
649 u8 *fb = (u8 *)item->info->fix.smem_start;
650 /* make sure we do not race against fb core when
651 * releasing */
652 mutex_lock(&item->info->lock);
653 mutex_unlock(&item->info->lock);
654 framebuffer_release(item->info);
655 vfree(fb);
656 }
657 } while (item);
658}
659
660DECLARE_WORK(picolcd_fb_cleanup, picolcd_fb_do_cleanup);
661
662static int picolcd_fb_open(struct fb_info *info, int u)
663{
664 u32 *ref_cnt = info->pseudo_palette;
665 ref_cnt--;
666
667 (*ref_cnt)++;
668 return 0;
669}
670
671static int picolcd_fb_release(struct fb_info *info, int u)
672{
673 u32 *ref_cnt = info->pseudo_palette;
674 ref_cnt--;
675
676 (*ref_cnt)++;
677 if (!*ref_cnt) {
678 unsigned long flags;
679 struct picolcd_fb_cleanup_item *item = (struct picolcd_fb_cleanup_item *)ref_cnt;
680 item--;
681 spin_lock_irqsave(&fb_pending_lock, flags);
682 item->next = fb_pending;
683 fb_pending = item;
684 spin_unlock_irqrestore(&fb_pending_lock, flags);
685 schedule_work(&picolcd_fb_cleanup);
686 }
687 return 0;
688}
689
690/* Note this can't be const because of struct fb_info definition */
691static struct fb_ops picolcdfb_ops = {
692 .owner = THIS_MODULE,
693 .fb_destroy = picolcd_fb_destroy,
694 .fb_open = picolcd_fb_open,
695 .fb_release = picolcd_fb_release,
696 .fb_read = fb_sys_read,
697 .fb_write = picolcd_fb_write,
698 .fb_blank = picolcd_fb_blank,
699 .fb_fillrect = picolcd_fb_fillrect,
700 .fb_copyarea = picolcd_fb_copyarea,
701 .fb_imageblit = picolcd_fb_imageblit,
702 .fb_check_var = picolcd_fb_check_var,
703 .fb_set_par = picolcd_set_par,
704};
705
706
707/* Callback from deferred IO workqueue */
708static void picolcd_fb_deferred_io(struct fb_info *info, struct list_head *pagelist)
709{
710 picolcd_fb_update(info->par);
711}
712
713static const struct fb_deferred_io picolcd_fb_defio = {
714 .delay = HZ / PICOLCDFB_UPDATE_RATE_DEFAULT,
715 .deferred_io = picolcd_fb_deferred_io,
716};
717
718
719/*
720 * The "fb_update_rate" sysfs attribute
721 */
722static ssize_t picolcd_fb_update_rate_show(struct device *dev,
723 struct device_attribute *attr, char *buf)
724{
725 struct picolcd_data *data = dev_get_drvdata(dev);
726 unsigned i, fb_update_rate = data->fb_update_rate;
727 size_t ret = 0;
728
729 for (i = 1; i <= PICOLCDFB_UPDATE_RATE_LIMIT; i++)
730 if (ret >= PAGE_SIZE)
731 break;
732 else if (i == fb_update_rate)
733 ret += snprintf(buf+ret, PAGE_SIZE-ret, "[%u] ", i);
734 else
735 ret += snprintf(buf+ret, PAGE_SIZE-ret, "%u ", i);
736 if (ret > 0)
737 buf[min(ret, (size_t)PAGE_SIZE)-1] = '\n';
738 return ret;
739}
740
741static ssize_t picolcd_fb_update_rate_store(struct device *dev,
742 struct device_attribute *attr, const char *buf, size_t count)
743{
744 struct picolcd_data *data = dev_get_drvdata(dev);
745 int i;
746 unsigned u;
747
748 if (count < 1 || count > 10)
749 return -EINVAL;
750
751 i = sscanf(buf, "%u", &u);
752 if (i != 1)
753 return -EINVAL;
754
755 if (u > PICOLCDFB_UPDATE_RATE_LIMIT)
756 return -ERANGE;
757 else if (u == 0)
758 u = PICOLCDFB_UPDATE_RATE_DEFAULT;
759
760 data->fb_update_rate = u;
761 data->fb_defio.delay = HZ / data->fb_update_rate;
762 return count;
763}
764
765static DEVICE_ATTR(fb_update_rate, 0666, picolcd_fb_update_rate_show,
766 picolcd_fb_update_rate_store);
767
768/* initialize Framebuffer device */
769static int picolcd_init_framebuffer(struct picolcd_data *data)
770{
771 struct device *dev = &data->hdev->dev;
772 struct fb_info *info = NULL;
773 int i, error = -ENOMEM;
774 u8 *fb_vbitmap = NULL;
775 u8 *fb_bitmap = NULL;
776 u32 *palette;
777
778 fb_bitmap = vmalloc(PICOLCDFB_SIZE*8);
779 if (fb_bitmap == NULL) {
780 dev_err(dev, "can't get a free page for framebuffer\n");
781 goto err_nomem;
782 }
783
784 fb_vbitmap = kmalloc(PICOLCDFB_SIZE, GFP_KERNEL);
785 if (fb_vbitmap == NULL) {
786 dev_err(dev, "can't alloc vbitmap image buffer\n");
787 goto err_nomem;
788 }
789
790 data->fb_update_rate = PICOLCDFB_UPDATE_RATE_DEFAULT;
791 data->fb_defio = picolcd_fb_defio;
792 /* The extra memory is:
793 * - struct picolcd_fb_cleanup_item
794 * - u32 for ref_count
795 * - 256*u32 for pseudo_palette
796 */
797 info = framebuffer_alloc(257 * sizeof(u32) + sizeof(struct picolcd_fb_cleanup_item), dev);
798 if (info == NULL) {
799 dev_err(dev, "failed to allocate a framebuffer\n");
800 goto err_nomem;
801 }
802
803 palette = info->par + sizeof(struct picolcd_fb_cleanup_item);
804 *palette = 1;
805 palette++;
806 for (i = 0; i < 256; i++)
807 palette[i] = i > 0 && i < 16 ? 0xff : 0;
808 info->pseudo_palette = palette;
809 info->fbdefio = &data->fb_defio;
810 info->screen_base = (char __force __iomem *)fb_bitmap;
811 info->fbops = &picolcdfb_ops;
812 info->var = picolcdfb_var;
813 info->fix = picolcdfb_fix;
814 info->fix.smem_len = PICOLCDFB_SIZE*8;
815 info->fix.smem_start = (unsigned long)fb_bitmap;
816 info->par = data;
817 info->flags = FBINFO_FLAG_DEFAULT;
818
819 data->fb_vbitmap = fb_vbitmap;
820 data->fb_bitmap = fb_bitmap;
821 data->fb_bpp = picolcdfb_var.bits_per_pixel;
822 error = picolcd_fb_reset(data, 1);
823 if (error) {
824 dev_err(dev, "failed to configure display\n");
825 goto err_cleanup;
826 }
827 error = device_create_file(dev, &dev_attr_fb_update_rate);
828 if (error) {
829 dev_err(dev, "failed to create sysfs attributes\n");
830 goto err_cleanup;
831 }
832 fb_deferred_io_init(info);
833 data->fb_info = info;
834 error = register_framebuffer(info);
835 if (error) {
836 dev_err(dev, "failed to register framebuffer\n");
837 goto err_sysfs;
838 }
839 /* schedule first output of framebuffer */
840 data->fb_force = 1;
841 schedule_delayed_work(&info->deferred_work, 0);
842 return 0;
843
844err_sysfs:
845 fb_deferred_io_cleanup(info);
846 device_remove_file(dev, &dev_attr_fb_update_rate);
847err_cleanup:
848 data->fb_vbitmap = NULL;
849 data->fb_bitmap = NULL;
850 data->fb_bpp = 0;
851 data->fb_info = NULL;
852
853err_nomem:
854 framebuffer_release(info);
855 vfree(fb_bitmap);
856 kfree(fb_vbitmap);
857 return error;
858}
859
860static void picolcd_exit_framebuffer(struct picolcd_data *data)
861{
862 struct fb_info *info = data->fb_info;
863 u8 *fb_vbitmap = data->fb_vbitmap;
864
865 if (!info)
866 return;
867
868 info->par = NULL;
869 device_remove_file(&data->hdev->dev, &dev_attr_fb_update_rate);
870 unregister_framebuffer(info);
871 data->fb_vbitmap = NULL;
872 data->fb_bitmap = NULL;
873 data->fb_bpp = 0;
874 data->fb_info = NULL;
875 kfree(fb_vbitmap);
876}
877
878#define picolcd_fbinfo(d) ((d)->fb_info)
879#else
880static inline int picolcd_fb_reset(struct picolcd_data *data, int clear)
881{
882 return 0;
883}
884static inline int picolcd_init_framebuffer(struct picolcd_data *data)
885{
886 return 0;
887}
888static inline void picolcd_exit_framebuffer(struct picolcd_data *data)
889{
890}
891#define picolcd_fbinfo(d) NULL
892#endif /* CONFIG_HID_PICOLCD_FB */
893
894#ifdef CONFIG_HID_PICOLCD_BACKLIGHT
895/*
896 * backlight class device
897 */
898static int picolcd_get_brightness(struct backlight_device *bdev)
899{
900 struct picolcd_data *data = bl_get_data(bdev);
901 return data->lcd_brightness;
902}
903
904static int picolcd_set_brightness(struct backlight_device *bdev)
905{
906 struct picolcd_data *data = bl_get_data(bdev);
907 struct hid_report *report = picolcd_out_report(REPORT_BRIGHTNESS, data->hdev);
908 unsigned long flags;
909
910 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
911 return -ENODEV;
912
913 data->lcd_brightness = bdev->props.brightness & 0x0ff;
914 data->lcd_power = bdev->props.power;
915 spin_lock_irqsave(&data->lock, flags);
916 hid_set_field(report->field[0], 0, data->lcd_power == FB_BLANK_UNBLANK ? data->lcd_brightness : 0);
917 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
918 spin_unlock_irqrestore(&data->lock, flags);
919 return 0;
920}
921
922static int picolcd_check_bl_fb(struct backlight_device *bdev, struct fb_info *fb)
923{
924 return fb && fb == picolcd_fbinfo((struct picolcd_data *)bl_get_data(bdev));
925}
926
927static const struct backlight_ops picolcd_blops = {
928 .update_status = picolcd_set_brightness,
929 .get_brightness = picolcd_get_brightness,
930 .check_fb = picolcd_check_bl_fb,
931};
932
933static int picolcd_init_backlight(struct picolcd_data *data, struct hid_report *report)
934{
935 struct device *dev = &data->hdev->dev;
936 struct backlight_device *bdev;
937 struct backlight_properties props;
938 if (!report)
939 return -ENODEV;
940 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
941 report->field[0]->report_size != 8) {
942 dev_err(dev, "unsupported BRIGHTNESS report");
943 return -EINVAL;
944 }
945
946 memset(&props, 0, sizeof(props));
947 props.type = BACKLIGHT_RAW;
948 props.max_brightness = 0xff;
949 bdev = backlight_device_register(dev_name(dev), dev, data,
950 &picolcd_blops, &props);
951 if (IS_ERR(bdev)) {
952 dev_err(dev, "failed to register backlight\n");
953 return PTR_ERR(bdev);
954 }
955 bdev->props.brightness = 0xff;
956 data->lcd_brightness = 0xff;
957 data->backlight = bdev;
958 picolcd_set_brightness(bdev);
959 return 0;
960}
961
962static void picolcd_exit_backlight(struct picolcd_data *data)
963{
964 struct backlight_device *bdev = data->backlight;
965
966 data->backlight = NULL;
967 if (bdev)
968 backlight_device_unregister(bdev);
969}
970
971static inline int picolcd_resume_backlight(struct picolcd_data *data)
972{
973 if (!data->backlight)
974 return 0;
975 return picolcd_set_brightness(data->backlight);
976}
977
978#ifdef CONFIG_PM
979static void picolcd_suspend_backlight(struct picolcd_data *data)
980{
981 int bl_power = data->lcd_power;
982 if (!data->backlight)
983 return;
984
985 data->backlight->props.power = FB_BLANK_POWERDOWN;
986 picolcd_set_brightness(data->backlight);
987 data->lcd_power = data->backlight->props.power = bl_power;
988}
989#endif /* CONFIG_PM */
990#else
991static inline int picolcd_init_backlight(struct picolcd_data *data,
992 struct hid_report *report)
993{
994 return 0;
995}
996static inline void picolcd_exit_backlight(struct picolcd_data *data)
997{
998}
999static inline int picolcd_resume_backlight(struct picolcd_data *data)
1000{
1001 return 0;
1002}
1003static inline void picolcd_suspend_backlight(struct picolcd_data *data)
1004{
1005}
1006#endif /* CONFIG_HID_PICOLCD_BACKLIGHT */
1007
1008#ifdef CONFIG_HID_PICOLCD_LCD
1009/*
1010 * lcd class device
1011 */
1012static int picolcd_get_contrast(struct lcd_device *ldev)
1013{
1014 struct picolcd_data *data = lcd_get_data(ldev);
1015 return data->lcd_contrast;
1016}
1017
1018static int picolcd_set_contrast(struct lcd_device *ldev, int contrast)
1019{
1020 struct picolcd_data *data = lcd_get_data(ldev);
1021 struct hid_report *report = picolcd_out_report(REPORT_CONTRAST, data->hdev);
1022 unsigned long flags;
1023
1024 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
1025 return -ENODEV;
1026
1027 data->lcd_contrast = contrast & 0x0ff;
1028 spin_lock_irqsave(&data->lock, flags);
1029 hid_set_field(report->field[0], 0, data->lcd_contrast);
1030 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
1031 spin_unlock_irqrestore(&data->lock, flags);
1032 return 0;
1033}
1034
1035static int picolcd_check_lcd_fb(struct lcd_device *ldev, struct fb_info *fb)
1036{
1037 return fb && fb == picolcd_fbinfo((struct picolcd_data *)lcd_get_data(ldev));
1038}
1039
1040static struct lcd_ops picolcd_lcdops = {
1041 .get_contrast = picolcd_get_contrast,
1042 .set_contrast = picolcd_set_contrast,
1043 .check_fb = picolcd_check_lcd_fb,
1044};
1045
1046static int picolcd_init_lcd(struct picolcd_data *data, struct hid_report *report)
1047{
1048 struct device *dev = &data->hdev->dev;
1049 struct lcd_device *ldev;
1050
1051 if (!report)
1052 return -ENODEV;
1053 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
1054 report->field[0]->report_size != 8) {
1055 dev_err(dev, "unsupported CONTRAST report");
1056 return -EINVAL;
1057 }
1058
1059 ldev = lcd_device_register(dev_name(dev), dev, data, &picolcd_lcdops);
1060 if (IS_ERR(ldev)) {
1061 dev_err(dev, "failed to register LCD\n");
1062 return PTR_ERR(ldev);
1063 }
1064 ldev->props.max_contrast = 0x0ff;
1065 data->lcd_contrast = 0xe5;
1066 data->lcd = ldev;
1067 picolcd_set_contrast(ldev, 0xe5);
1068 return 0;
1069}
1070
1071static void picolcd_exit_lcd(struct picolcd_data *data)
1072{
1073 struct lcd_device *ldev = data->lcd;
1074
1075 data->lcd = NULL;
1076 if (ldev)
1077 lcd_device_unregister(ldev);
1078}
1079
1080static inline int picolcd_resume_lcd(struct picolcd_data *data)
1081{
1082 if (!data->lcd)
1083 return 0;
1084 return picolcd_set_contrast(data->lcd, data->lcd_contrast);
1085}
1086#else
1087static inline int picolcd_init_lcd(struct picolcd_data *data,
1088 struct hid_report *report)
1089{
1090 return 0;
1091}
1092static inline void picolcd_exit_lcd(struct picolcd_data *data)
1093{
1094}
1095static inline int picolcd_resume_lcd(struct picolcd_data *data)
1096{
1097 return 0;
1098}
1099#endif /* CONFIG_HID_PICOLCD_LCD */
1100
1101#ifdef CONFIG_HID_PICOLCD_LEDS
1102/**
1103 * LED class device
1104 */
1105static void picolcd_leds_set(struct picolcd_data *data)
1106{
1107 struct hid_report *report;
1108 unsigned long flags;
1109
1110 if (!data->led[0])
1111 return;
1112 report = picolcd_out_report(REPORT_LED_STATE, data->hdev);
1113 if (!report || report->maxfield != 1 || report->field[0]->report_count != 1)
1114 return;
1115
1116 spin_lock_irqsave(&data->lock, flags);
1117 hid_set_field(report->field[0], 0, data->led_state);
1118 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
1119 spin_unlock_irqrestore(&data->lock, flags);
1120}
1121
1122static void picolcd_led_set_brightness(struct led_classdev *led_cdev,
1123 enum led_brightness value)
1124{
1125 struct device *dev;
1126 struct hid_device *hdev;
1127 struct picolcd_data *data;
1128 int i, state = 0;
1129
1130 dev = led_cdev->dev->parent;
1131 hdev = container_of(dev, struct hid_device, dev);
1132 data = hid_get_drvdata(hdev);
1133 for (i = 0; i < 8; i++) {
1134 if (led_cdev != data->led[i])
1135 continue;
1136 state = (data->led_state >> i) & 1;
1137 if (value == LED_OFF && state) {
1138 data->led_state &= ~(1 << i);
1139 picolcd_leds_set(data);
1140 } else if (value != LED_OFF && !state) {
1141 data->led_state |= 1 << i;
1142 picolcd_leds_set(data);
1143 }
1144 break;
1145 }
1146}
1147
1148static enum led_brightness picolcd_led_get_brightness(struct led_classdev *led_cdev)
1149{
1150 struct device *dev;
1151 struct hid_device *hdev;
1152 struct picolcd_data *data;
1153 int i, value = 0;
1154
1155 dev = led_cdev->dev->parent;
1156 hdev = container_of(dev, struct hid_device, dev);
1157 data = hid_get_drvdata(hdev);
1158 for (i = 0; i < 8; i++)
1159 if (led_cdev == data->led[i]) {
1160 value = (data->led_state >> i) & 1;
1161 break;
1162 }
1163 return value ? LED_FULL : LED_OFF;
1164}
1165
1166static int picolcd_init_leds(struct picolcd_data *data, struct hid_report *report)
1167{
1168 struct device *dev = &data->hdev->dev;
1169 struct led_classdev *led;
1170 size_t name_sz = strlen(dev_name(dev)) + 8;
1171 char *name;
1172 int i, ret = 0;
1173
1174 if (!report)
1175 return -ENODEV;
1176 if (report->maxfield != 1 || report->field[0]->report_count != 1 ||
1177 report->field[0]->report_size != 8) {
1178 dev_err(dev, "unsupported LED_STATE report");
1179 return -EINVAL;
1180 }
1181
1182 for (i = 0; i < 8; i++) {
1183 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1184 if (!led) {
1185 dev_err(dev, "can't allocate memory for LED %d\n", i);
1186 ret = -ENOMEM;
1187 goto err;
1188 }
1189 name = (void *)(&led[1]);
1190 snprintf(name, name_sz, "%s::GPO%d", dev_name(dev), i);
1191 led->name = name;
1192 led->brightness = 0;
1193 led->max_brightness = 1;
1194 led->brightness_get = picolcd_led_get_brightness;
1195 led->brightness_set = picolcd_led_set_brightness;
1196
1197 data->led[i] = led;
1198 ret = led_classdev_register(dev, data->led[i]);
1199 if (ret) {
1200 data->led[i] = NULL;
1201 kfree(led);
1202 dev_err(dev, "can't register LED %d\n", i);
1203 goto err;
1204 }
1205 }
1206 return 0;
1207err:
1208 for (i = 0; i < 8; i++)
1209 if (data->led[i]) {
1210 led = data->led[i];
1211 data->led[i] = NULL;
1212 led_classdev_unregister(led);
1213 kfree(led);
1214 }
1215 return ret;
1216}
1217
1218static void picolcd_exit_leds(struct picolcd_data *data)
1219{
1220 struct led_classdev *led;
1221 int i;
1222
1223 for (i = 0; i < 8; i++) {
1224 led = data->led[i];
1225 data->led[i] = NULL;
1226 if (!led)
1227 continue;
1228 led_classdev_unregister(led);
1229 kfree(led);
1230 }
1231}
1232
1233#else
1234static inline int picolcd_init_leds(struct picolcd_data *data,
1235 struct hid_report *report)
1236{
1237 return 0;
1238}
1239static inline void picolcd_exit_leds(struct picolcd_data *data)
1240{
1241}
1242static inline int picolcd_leds_set(struct picolcd_data *data)
1243{
1244 return 0;
1245}
1246#endif /* CONFIG_HID_PICOLCD_LEDS */
1247
1248/*
1249 * input class device
1250 */
1251static int picolcd_raw_keypad(struct picolcd_data *data,
1252 struct hid_report *report, u8 *raw_data, int size)
1253{
1254 /*
1255 * Keypad event
1256 * First and second data bytes list currently pressed keys,
1257 * 0x00 means no key and at most 2 keys may be pressed at same time
1258 */
1259 int i, j;
1260
1261 /* determine newly pressed keys */
1262 for (i = 0; i < size; i++) {
1263 unsigned int key_code;
1264 if (raw_data[i] == 0)
1265 continue;
1266 for (j = 0; j < sizeof(data->pressed_keys); j++)
1267 if (data->pressed_keys[j] == raw_data[i])
1268 goto key_already_down;
1269 for (j = 0; j < sizeof(data->pressed_keys); j++)
1270 if (data->pressed_keys[j] == 0) {
1271 data->pressed_keys[j] = raw_data[i];
1272 break;
1273 }
1274 input_event(data->input_keys, EV_MSC, MSC_SCAN, raw_data[i]);
1275 if (raw_data[i] < PICOLCD_KEYS)
1276 key_code = data->keycode[raw_data[i]];
1277 else
1278 key_code = KEY_UNKNOWN;
1279 if (key_code != KEY_UNKNOWN) {
1280 dbg_hid(PICOLCD_NAME " got key press for %u:%d",
1281 raw_data[i], key_code);
1282 input_report_key(data->input_keys, key_code, 1);
1283 }
1284 input_sync(data->input_keys);
1285key_already_down:
1286 continue;
1287 }
1288
1289 /* determine newly released keys */
1290 for (j = 0; j < sizeof(data->pressed_keys); j++) {
1291 unsigned int key_code;
1292 if (data->pressed_keys[j] == 0)
1293 continue;
1294 for (i = 0; i < size; i++)
1295 if (data->pressed_keys[j] == raw_data[i])
1296 goto key_still_down;
1297 input_event(data->input_keys, EV_MSC, MSC_SCAN, data->pressed_keys[j]);
1298 if (data->pressed_keys[j] < PICOLCD_KEYS)
1299 key_code = data->keycode[data->pressed_keys[j]];
1300 else
1301 key_code = KEY_UNKNOWN;
1302 if (key_code != KEY_UNKNOWN) {
1303 dbg_hid(PICOLCD_NAME " got key release for %u:%d",
1304 data->pressed_keys[j], key_code);
1305 input_report_key(data->input_keys, key_code, 0);
1306 }
1307 input_sync(data->input_keys);
1308 data->pressed_keys[j] = 0;
1309key_still_down:
1310 continue;
1311 }
1312 return 1;
1313}
1314
1315static int picolcd_raw_cir(struct picolcd_data *data,
1316 struct hid_report *report, u8 *raw_data, int size)
1317{
1318 /* Need understanding of CIR data format to implement ... */
1319 return 1;
1320}
1321
1322static int picolcd_check_version(struct hid_device *hdev)
1323{
1324 struct picolcd_data *data = hid_get_drvdata(hdev);
1325 struct picolcd_pending *verinfo;
1326 int ret = 0;
1327
1328 if (!data)
1329 return -ENODEV;
1330
1331 verinfo = picolcd_send_and_wait(hdev, REPORT_VERSION, NULL, 0);
1332 if (!verinfo) {
1333 hid_err(hdev, "no version response from PicoLCD\n");
1334 return -ENODEV;
1335 }
1336
1337 if (verinfo->raw_size == 2) {
1338 data->version[0] = verinfo->raw_data[1];
1339 data->version[1] = verinfo->raw_data[0];
1340 if (data->status & PICOLCD_BOOTLOADER) {
1341 hid_info(hdev, "PicoLCD, bootloader version %d.%d\n",
1342 verinfo->raw_data[1], verinfo->raw_data[0]);
1343 } else {
1344 hid_info(hdev, "PicoLCD, firmware version %d.%d\n",
1345 verinfo->raw_data[1], verinfo->raw_data[0]);
1346 }
1347 } else {
1348 hid_err(hdev, "confused, got unexpected version response from PicoLCD\n");
1349 ret = -EINVAL;
1350 }
1351 kfree(verinfo);
1352 return ret;
1353}
1354
1355/*
1356 * Reset our device and wait for answer to VERSION request
1357 */
1358static int picolcd_reset(struct hid_device *hdev)
1359{
1360 struct picolcd_data *data = hid_get_drvdata(hdev);
1361 struct hid_report *report = picolcd_out_report(REPORT_RESET, hdev);
1362 unsigned long flags;
1363 int error;
1364
1365 if (!data || !report || report->maxfield != 1)
1366 return -ENODEV;
1367
1368 spin_lock_irqsave(&data->lock, flags);
1369 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
1370 data->status |= PICOLCD_BOOTLOADER;
1371
1372 /* perform the reset */
1373 hid_set_field(report->field[0], 0, 1);
1374 usbhid_submit_report(hdev, report, USB_DIR_OUT);
1375 spin_unlock_irqrestore(&data->lock, flags);
1376
1377 error = picolcd_check_version(hdev);
1378 if (error)
1379 return error;
1380
1381 picolcd_resume_lcd(data);
1382 picolcd_resume_backlight(data);
1383#ifdef CONFIG_HID_PICOLCD_FB
1384 if (data->fb_info)
1385 schedule_delayed_work(&data->fb_info->deferred_work, 0);
1386#endif /* CONFIG_HID_PICOLCD_FB */
1387
1388 picolcd_leds_set(data);
1389 return 0;
1390}
1391
1392/*
1393 * The "operation_mode" sysfs attribute
1394 */
1395static ssize_t picolcd_operation_mode_show(struct device *dev,
1396 struct device_attribute *attr, char *buf)
1397{
1398 struct picolcd_data *data = dev_get_drvdata(dev);
1399
1400 if (data->status & PICOLCD_BOOTLOADER)
1401 return snprintf(buf, PAGE_SIZE, "[bootloader] lcd\n");
1402 else
1403 return snprintf(buf, PAGE_SIZE, "bootloader [lcd]\n");
1404}
1405
1406static ssize_t picolcd_operation_mode_store(struct device *dev,
1407 struct device_attribute *attr, const char *buf, size_t count)
1408{
1409 struct picolcd_data *data = dev_get_drvdata(dev);
1410 struct hid_report *report = NULL;
1411 size_t cnt = count;
1412 int timeout = data->opmode_delay;
1413 unsigned long flags;
1414
1415 if (cnt >= 3 && strncmp("lcd", buf, 3) == 0) {
1416 if (data->status & PICOLCD_BOOTLOADER)
1417 report = picolcd_out_report(REPORT_EXIT_FLASHER, data->hdev);
1418 buf += 3;
1419 cnt -= 3;
1420 } else if (cnt >= 10 && strncmp("bootloader", buf, 10) == 0) {
1421 if (!(data->status & PICOLCD_BOOTLOADER))
1422 report = picolcd_out_report(REPORT_EXIT_KEYBOARD, data->hdev);
1423 buf += 10;
1424 cnt -= 10;
1425 }
1426 if (!report)
1427 return -EINVAL;
1428
1429 while (cnt > 0 && (buf[cnt-1] == '\n' || buf[cnt-1] == '\r'))
1430 cnt--;
1431 if (cnt != 0)
1432 return -EINVAL;
1433
1434 spin_lock_irqsave(&data->lock, flags);
1435 hid_set_field(report->field[0], 0, timeout & 0xff);
1436 hid_set_field(report->field[0], 1, (timeout >> 8) & 0xff);
1437 usbhid_submit_report(data->hdev, report, USB_DIR_OUT);
1438 spin_unlock_irqrestore(&data->lock, flags);
1439 return count;
1440}
1441
1442static DEVICE_ATTR(operation_mode, 0644, picolcd_operation_mode_show,
1443 picolcd_operation_mode_store);
1444
1445/*
1446 * The "operation_mode_delay" sysfs attribute
1447 */
1448static ssize_t picolcd_operation_mode_delay_show(struct device *dev,
1449 struct device_attribute *attr, char *buf)
1450{
1451 struct picolcd_data *data = dev_get_drvdata(dev);
1452
1453 return snprintf(buf, PAGE_SIZE, "%hu\n", data->opmode_delay);
1454}
1455
1456static ssize_t picolcd_operation_mode_delay_store(struct device *dev,
1457 struct device_attribute *attr, const char *buf, size_t count)
1458{
1459 struct picolcd_data *data = dev_get_drvdata(dev);
1460 unsigned u;
1461 if (sscanf(buf, "%u", &u) != 1)
1462 return -EINVAL;
1463 if (u > 30000)
1464 return -EINVAL;
1465 else
1466 data->opmode_delay = u;
1467 return count;
1468}
1469
1470static DEVICE_ATTR(operation_mode_delay, 0644, picolcd_operation_mode_delay_show,
1471 picolcd_operation_mode_delay_store);
1472
1473
1474#ifdef CONFIG_DEBUG_FS
1475/*
1476 * The "reset" file
1477 */
1478static int picolcd_debug_reset_show(struct seq_file *f, void *p)
1479{
1480 if (picolcd_fbinfo((struct picolcd_data *)f->private))
1481 seq_printf(f, "all fb\n");
1482 else
1483 seq_printf(f, "all\n");
1484 return 0;
1485}
1486
1487static int picolcd_debug_reset_open(struct inode *inode, struct file *f)
1488{
1489 return single_open(f, picolcd_debug_reset_show, inode->i_private);
1490}
1491
1492static ssize_t picolcd_debug_reset_write(struct file *f, const char __user *user_buf,
1493 size_t count, loff_t *ppos)
1494{
1495 struct picolcd_data *data = ((struct seq_file *)f->private_data)->private;
1496 char buf[32];
1497 size_t cnt = min(count, sizeof(buf)-1);
1498 if (copy_from_user(buf, user_buf, cnt))
1499 return -EFAULT;
1500
1501 while (cnt > 0 && (buf[cnt-1] == ' ' || buf[cnt-1] == '\n'))
1502 cnt--;
1503 buf[cnt] = '\0';
1504 if (strcmp(buf, "all") == 0) {
1505 picolcd_reset(data->hdev);
1506 picolcd_fb_reset(data, 1);
1507 } else if (strcmp(buf, "fb") == 0) {
1508 picolcd_fb_reset(data, 1);
1509 } else {
1510 return -EINVAL;
1511 }
1512 return count;
1513}
1514
1515static const struct file_operations picolcd_debug_reset_fops = {
1516 .owner = THIS_MODULE,
1517 .open = picolcd_debug_reset_open,
1518 .read = seq_read,
1519 .llseek = seq_lseek,
1520 .write = picolcd_debug_reset_write,
1521 .release = single_release,
1522};
1523
1524/*
1525 * The "eeprom" file
1526 */
1527static int picolcd_debug_eeprom_open(struct inode *i, struct file *f)
1528{
1529 f->private_data = i->i_private;
1530 return 0;
1531}
1532
1533static ssize_t picolcd_debug_eeprom_read(struct file *f, char __user *u,
1534 size_t s, loff_t *off)
1535{
1536 struct picolcd_data *data = f->private_data;
1537 struct picolcd_pending *resp;
1538 u8 raw_data[3];
1539 ssize_t ret = -EIO;
1540
1541 if (s == 0)
1542 return -EINVAL;
1543 if (*off > 0x0ff)
1544 return 0;
1545
1546 /* prepare buffer with info about what we want to read (addr & len) */
1547 raw_data[0] = *off & 0xff;
1548 raw_data[1] = (*off >> 8) & 0xff;
1549 raw_data[2] = s < 20 ? s : 20;
1550 if (*off + raw_data[2] > 0xff)
1551 raw_data[2] = 0x100 - *off;
1552 resp = picolcd_send_and_wait(data->hdev, REPORT_EE_READ, raw_data,
1553 sizeof(raw_data));
1554 if (!resp)
1555 return -EIO;
1556
1557 if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
1558 /* successful read :) */
1559 ret = resp->raw_data[2];
1560 if (ret > s)
1561 ret = s;
1562 if (copy_to_user(u, resp->raw_data+3, ret))
1563 ret = -EFAULT;
1564 else
1565 *off += ret;
1566 } /* anything else is some kind of IO error */
1567
1568 kfree(resp);
1569 return ret;
1570}
1571
1572static ssize_t picolcd_debug_eeprom_write(struct file *f, const char __user *u,
1573 size_t s, loff_t *off)
1574{
1575 struct picolcd_data *data = f->private_data;
1576 struct picolcd_pending *resp;
1577 ssize_t ret = -EIO;
1578 u8 raw_data[23];
1579
1580 if (s == 0)
1581 return -EINVAL;
1582 if (*off > 0x0ff)
1583 return -ENOSPC;
1584
1585 memset(raw_data, 0, sizeof(raw_data));
1586 raw_data[0] = *off & 0xff;
1587 raw_data[1] = (*off >> 8) & 0xff;
1588 raw_data[2] = min((size_t)20, s);
1589 if (*off + raw_data[2] > 0xff)
1590 raw_data[2] = 0x100 - *off;
1591
1592 if (copy_from_user(raw_data+3, u, min((u8)20, raw_data[2])))
1593 return -EFAULT;
1594 resp = picolcd_send_and_wait(data->hdev, REPORT_EE_WRITE, raw_data,
1595 sizeof(raw_data));
1596
1597 if (!resp)
1598 return -EIO;
1599
1600 if (resp->in_report && resp->in_report->id == REPORT_EE_DATA) {
1601 /* check if written data matches */
1602 if (memcmp(raw_data, resp->raw_data, 3+raw_data[2]) == 0) {
1603 *off += raw_data[2];
1604 ret = raw_data[2];
1605 }
1606 }
1607 kfree(resp);
1608 return ret;
1609}
1610
1611/*
1612 * Notes:
1613 * - read/write happens in chunks of at most 20 bytes, it's up to userspace
1614 * to loop in order to get more data.
1615 * - on write errors on otherwise correct write request the bytes
1616 * that should have been written are in undefined state.
1617 */
1618static const struct file_operations picolcd_debug_eeprom_fops = {
1619 .owner = THIS_MODULE,
1620 .open = picolcd_debug_eeprom_open,
1621 .read = picolcd_debug_eeprom_read,
1622 .write = picolcd_debug_eeprom_write,
1623 .llseek = generic_file_llseek,
1624};
1625
1626/*
1627 * The "flash" file
1628 */
1629static int picolcd_debug_flash_open(struct inode *i, struct file *f)
1630{
1631 f->private_data = i->i_private;
1632 return 0;
1633}
1634
1635/* record a flash address to buf (bounds check to be done by caller) */
1636static int _picolcd_flash_setaddr(struct picolcd_data *data, u8 *buf, long off)
1637{
1638 buf[0] = off & 0xff;
1639 buf[1] = (off >> 8) & 0xff;
1640 if (data->addr_sz == 3)
1641 buf[2] = (off >> 16) & 0xff;
1642 return data->addr_sz == 2 ? 2 : 3;
1643}
1644
1645/* read a given size of data (bounds check to be done by caller) */
1646static ssize_t _picolcd_flash_read(struct picolcd_data *data, int report_id,
1647 char __user *u, size_t s, loff_t *off)
1648{
1649 struct picolcd_pending *resp;
1650 u8 raw_data[4];
1651 ssize_t ret = 0;
1652 int len_off, err = -EIO;
1653
1654 while (s > 0) {
1655 err = -EIO;
1656 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1657 raw_data[len_off] = s > 32 ? 32 : s;
1658 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off+1);
1659 if (!resp || !resp->in_report)
1660 goto skip;
1661 if (resp->in_report->id == REPORT_MEMORY ||
1662 resp->in_report->id == REPORT_BL_READ_MEMORY) {
1663 if (memcmp(raw_data, resp->raw_data, len_off+1) != 0)
1664 goto skip;
1665 if (copy_to_user(u+ret, resp->raw_data+len_off+1, raw_data[len_off])) {
1666 err = -EFAULT;
1667 goto skip;
1668 }
1669 *off += raw_data[len_off];
1670 s -= raw_data[len_off];
1671 ret += raw_data[len_off];
1672 err = 0;
1673 }
1674skip:
1675 kfree(resp);
1676 if (err)
1677 return ret > 0 ? ret : err;
1678 }
1679 return ret;
1680}
1681
1682static ssize_t picolcd_debug_flash_read(struct file *f, char __user *u,
1683 size_t s, loff_t *off)
1684{
1685 struct picolcd_data *data = f->private_data;
1686
1687 if (s == 0)
1688 return -EINVAL;
1689 if (*off > 0x05fff)
1690 return 0;
1691 if (*off + s > 0x05fff)
1692 s = 0x06000 - *off;
1693
1694 if (data->status & PICOLCD_BOOTLOADER)
1695 return _picolcd_flash_read(data, REPORT_BL_READ_MEMORY, u, s, off);
1696 else
1697 return _picolcd_flash_read(data, REPORT_READ_MEMORY, u, s, off);
1698}
1699
1700/* erase block aligned to 64bytes boundary */
1701static ssize_t _picolcd_flash_erase64(struct picolcd_data *data, int report_id,
1702 loff_t *off)
1703{
1704 struct picolcd_pending *resp;
1705 u8 raw_data[3];
1706 int len_off;
1707 ssize_t ret = -EIO;
1708
1709 if (*off & 0x3f)
1710 return -EINVAL;
1711
1712 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1713 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data, len_off);
1714 if (!resp || !resp->in_report)
1715 goto skip;
1716 if (resp->in_report->id == REPORT_MEMORY ||
1717 resp->in_report->id == REPORT_BL_ERASE_MEMORY) {
1718 if (memcmp(raw_data, resp->raw_data, len_off) != 0)
1719 goto skip;
1720 ret = 0;
1721 }
1722skip:
1723 kfree(resp);
1724 return ret;
1725}
1726
1727/* write a given size of data (bounds check to be done by caller) */
1728static ssize_t _picolcd_flash_write(struct picolcd_data *data, int report_id,
1729 const char __user *u, size_t s, loff_t *off)
1730{
1731 struct picolcd_pending *resp;
1732 u8 raw_data[36];
1733 ssize_t ret = 0;
1734 int len_off, err = -EIO;
1735
1736 while (s > 0) {
1737 err = -EIO;
1738 len_off = _picolcd_flash_setaddr(data, raw_data, *off);
1739 raw_data[len_off] = s > 32 ? 32 : s;
1740 if (copy_from_user(raw_data+len_off+1, u, raw_data[len_off])) {
1741 err = -EFAULT;
1742 break;
1743 }
1744 resp = picolcd_send_and_wait(data->hdev, report_id, raw_data,
1745 len_off+1+raw_data[len_off]);
1746 if (!resp || !resp->in_report)
1747 goto skip;
1748 if (resp->in_report->id == REPORT_MEMORY ||
1749 resp->in_report->id == REPORT_BL_WRITE_MEMORY) {
1750 if (memcmp(raw_data, resp->raw_data, len_off+1+raw_data[len_off]) != 0)
1751 goto skip;
1752 *off += raw_data[len_off];
1753 s -= raw_data[len_off];
1754 ret += raw_data[len_off];
1755 err = 0;
1756 }
1757skip:
1758 kfree(resp);
1759 if (err)
1760 break;
1761 }
1762 return ret > 0 ? ret : err;
1763}
1764
1765static ssize_t picolcd_debug_flash_write(struct file *f, const char __user *u,
1766 size_t s, loff_t *off)
1767{
1768 struct picolcd_data *data = f->private_data;
1769 ssize_t err, ret = 0;
1770 int report_erase, report_write;
1771
1772 if (s == 0)
1773 return -EINVAL;
1774 if (*off > 0x5fff)
1775 return -ENOSPC;
1776 if (s & 0x3f)
1777 return -EINVAL;
1778 if (*off & 0x3f)
1779 return -EINVAL;
1780
1781 if (data->status & PICOLCD_BOOTLOADER) {
1782 report_erase = REPORT_BL_ERASE_MEMORY;
1783 report_write = REPORT_BL_WRITE_MEMORY;
1784 } else {
1785 report_erase = REPORT_ERASE_MEMORY;
1786 report_write = REPORT_WRITE_MEMORY;
1787 }
1788 mutex_lock(&data->mutex_flash);
1789 while (s > 0) {
1790 err = _picolcd_flash_erase64(data, report_erase, off);
1791 if (err)
1792 break;
1793 err = _picolcd_flash_write(data, report_write, u, 64, off);
1794 if (err < 0)
1795 break;
1796 ret += err;
1797 *off += err;
1798 s -= err;
1799 if (err != 64)
1800 break;
1801 }
1802 mutex_unlock(&data->mutex_flash);
1803 return ret > 0 ? ret : err;
1804}
1805
1806/*
1807 * Notes:
1808 * - concurrent writing is prevented by mutex and all writes must be
1809 * n*64 bytes and 64-byte aligned, each write being preceded by an
1810 * ERASE which erases a 64byte block.
1811 * If less than requested was written or an error is returned for an
1812 * otherwise correct write request the next 64-byte block which should
1813 * have been written is in undefined state (mostly: original, erased,
1814 * (half-)written with write error)
1815 * - reading can happen without special restriction
1816 */
1817static const struct file_operations picolcd_debug_flash_fops = {
1818 .owner = THIS_MODULE,
1819 .open = picolcd_debug_flash_open,
1820 .read = picolcd_debug_flash_read,
1821 .write = picolcd_debug_flash_write,
1822 .llseek = generic_file_llseek,
1823};
1824
1825
1826/*
1827 * Helper code for HID report level dumping/debugging
1828 */
1829static const char *error_codes[] = {
1830 "success", "parameter missing", "data_missing", "block readonly",
1831 "block not erasable", "block too big", "section overflow",
1832 "invalid command length", "invalid data length",
1833};
1834
1835static void dump_buff_as_hex(char *dst, size_t dst_sz, const u8 *data,
1836 const size_t data_len)
1837{
1838 int i, j;
1839 for (i = j = 0; i < data_len && j + 3 < dst_sz; i++) {
1840 dst[j++] = hex_asc[(data[i] >> 4) & 0x0f];
1841 dst[j++] = hex_asc[data[i] & 0x0f];
1842 dst[j++] = ' ';
1843 }
1844 if (j < dst_sz) {
1845 dst[j--] = '\0';
1846 dst[j] = '\n';
1847 } else
1848 dst[j] = '\0';
1849}
1850
1851static void picolcd_debug_out_report(struct picolcd_data *data,
1852 struct hid_device *hdev, struct hid_report *report)
1853{
1854 u8 raw_data[70];
1855 int raw_size = (report->size >> 3) + 1;
1856 char *buff;
1857#define BUFF_SZ 256
1858
1859 /* Avoid unnecessary overhead if debugfs is disabled */
1860 if (!hdev->debug_events)
1861 return;
1862
1863 buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
1864 if (!buff)
1865 return;
1866
1867 snprintf(buff, BUFF_SZ, "\nout report %d (size %d) = ",
1868 report->id, raw_size);
1869 hid_debug_event(hdev, buff);
1870 if (raw_size + 5 > sizeof(raw_data)) {
1871 kfree(buff);
1872 hid_debug_event(hdev, " TOO BIG\n");
1873 return;
1874 } else {
1875 raw_data[0] = report->id;
1876 hid_output_report(report, raw_data);
1877 dump_buff_as_hex(buff, BUFF_SZ, raw_data, raw_size);
1878 hid_debug_event(hdev, buff);
1879 }
1880
1881 switch (report->id) {
1882 case REPORT_LED_STATE:
1883 /* 1 data byte with GPO state */
1884 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1885 "REPORT_LED_STATE", report->id, raw_size-1);
1886 hid_debug_event(hdev, buff);
1887 snprintf(buff, BUFF_SZ, "\tGPO state: 0x%02x\n", raw_data[1]);
1888 hid_debug_event(hdev, buff);
1889 break;
1890 case REPORT_BRIGHTNESS:
1891 /* 1 data byte with brightness */
1892 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1893 "REPORT_BRIGHTNESS", report->id, raw_size-1);
1894 hid_debug_event(hdev, buff);
1895 snprintf(buff, BUFF_SZ, "\tBrightness: 0x%02x\n", raw_data[1]);
1896 hid_debug_event(hdev, buff);
1897 break;
1898 case REPORT_CONTRAST:
1899 /* 1 data byte with contrast */
1900 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1901 "REPORT_CONTRAST", report->id, raw_size-1);
1902 hid_debug_event(hdev, buff);
1903 snprintf(buff, BUFF_SZ, "\tContrast: 0x%02x\n", raw_data[1]);
1904 hid_debug_event(hdev, buff);
1905 break;
1906 case REPORT_RESET:
1907 /* 2 data bytes with reset duration in ms */
1908 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1909 "REPORT_RESET", report->id, raw_size-1);
1910 hid_debug_event(hdev, buff);
1911 snprintf(buff, BUFF_SZ, "\tDuration: 0x%02x%02x (%dms)\n",
1912 raw_data[2], raw_data[1], raw_data[2] << 8 | raw_data[1]);
1913 hid_debug_event(hdev, buff);
1914 break;
1915 case REPORT_LCD_CMD:
1916 /* 63 data bytes with LCD commands */
1917 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1918 "REPORT_LCD_CMD", report->id, raw_size-1);
1919 hid_debug_event(hdev, buff);
1920 /* TODO: format decoding */
1921 break;
1922 case REPORT_LCD_DATA:
1923 /* 63 data bytes with LCD data */
1924 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1925 "REPORT_LCD_CMD", report->id, raw_size-1);
1926 /* TODO: format decoding */
1927 hid_debug_event(hdev, buff);
1928 break;
1929 case REPORT_LCD_CMD_DATA:
1930 /* 63 data bytes with LCD commands and data */
1931 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1932 "REPORT_LCD_CMD", report->id, raw_size-1);
1933 /* TODO: format decoding */
1934 hid_debug_event(hdev, buff);
1935 break;
1936 case REPORT_EE_READ:
1937 /* 3 data bytes with read area description */
1938 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1939 "REPORT_EE_READ", 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 break;
1947 case REPORT_EE_WRITE:
1948 /* 3+1..20 data bytes with write area description */
1949 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1950 "REPORT_EE_WRITE", report->id, raw_size-1);
1951 hid_debug_event(hdev, buff);
1952 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1953 raw_data[2], raw_data[1]);
1954 hid_debug_event(hdev, buff);
1955 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
1956 hid_debug_event(hdev, buff);
1957 if (raw_data[3] == 0) {
1958 snprintf(buff, BUFF_SZ, "\tNo data\n");
1959 } else if (raw_data[3] + 4 <= raw_size) {
1960 snprintf(buff, BUFF_SZ, "\tData: ");
1961 hid_debug_event(hdev, buff);
1962 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
1963 } else {
1964 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
1965 }
1966 hid_debug_event(hdev, buff);
1967 break;
1968 case REPORT_ERASE_MEMORY:
1969 case REPORT_BL_ERASE_MEMORY:
1970 /* 3 data bytes with pointer inside erase block */
1971 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1972 "REPORT_ERASE_MEMORY", report->id, raw_size-1);
1973 hid_debug_event(hdev, buff);
1974 switch (data->addr_sz) {
1975 case 2:
1976 snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x\n",
1977 raw_data[2], raw_data[1]);
1978 break;
1979 case 3:
1980 snprintf(buff, BUFF_SZ, "\tAddress inside 64 byte block: 0x%02x%02x%02x\n",
1981 raw_data[3], raw_data[2], raw_data[1]);
1982 break;
1983 default:
1984 snprintf(buff, BUFF_SZ, "\tNot supported\n");
1985 }
1986 hid_debug_event(hdev, buff);
1987 break;
1988 case REPORT_READ_MEMORY:
1989 case REPORT_BL_READ_MEMORY:
1990 /* 4 data bytes with read area description */
1991 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
1992 "REPORT_READ_MEMORY", report->id, raw_size-1);
1993 hid_debug_event(hdev, buff);
1994 switch (data->addr_sz) {
1995 case 2:
1996 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
1997 raw_data[2], raw_data[1]);
1998 hid_debug_event(hdev, buff);
1999 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2000 break;
2001 case 3:
2002 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
2003 raw_data[3], raw_data[2], raw_data[1]);
2004 hid_debug_event(hdev, buff);
2005 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
2006 break;
2007 default:
2008 snprintf(buff, BUFF_SZ, "\tNot supported\n");
2009 }
2010 hid_debug_event(hdev, buff);
2011 break;
2012 case REPORT_WRITE_MEMORY:
2013 case REPORT_BL_WRITE_MEMORY:
2014 /* 4+1..32 data bytes with write adrea description */
2015 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2016 "REPORT_WRITE_MEMORY", report->id, raw_size-1);
2017 hid_debug_event(hdev, buff);
2018 switch (data->addr_sz) {
2019 case 2:
2020 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
2021 raw_data[2], raw_data[1]);
2022 hid_debug_event(hdev, buff);
2023 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2024 hid_debug_event(hdev, buff);
2025 if (raw_data[3] == 0) {
2026 snprintf(buff, BUFF_SZ, "\tNo data\n");
2027 } else if (raw_data[3] + 4 <= raw_size) {
2028 snprintf(buff, BUFF_SZ, "\tData: ");
2029 hid_debug_event(hdev, buff);
2030 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
2031 } else {
2032 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2033 }
2034 break;
2035 case 3:
2036 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
2037 raw_data[3], raw_data[2], raw_data[1]);
2038 hid_debug_event(hdev, buff);
2039 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
2040 hid_debug_event(hdev, buff);
2041 if (raw_data[4] == 0) {
2042 snprintf(buff, BUFF_SZ, "\tNo data\n");
2043 } else if (raw_data[4] + 5 <= raw_size) {
2044 snprintf(buff, BUFF_SZ, "\tData: ");
2045 hid_debug_event(hdev, buff);
2046 dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
2047 } else {
2048 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2049 }
2050 break;
2051 default:
2052 snprintf(buff, BUFF_SZ, "\tNot supported\n");
2053 }
2054 hid_debug_event(hdev, buff);
2055 break;
2056 case REPORT_SPLASH_RESTART:
2057 /* TODO */
2058 break;
2059 case REPORT_EXIT_KEYBOARD:
2060 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2061 "REPORT_EXIT_KEYBOARD", report->id, raw_size-1);
2062 hid_debug_event(hdev, buff);
2063 snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
2064 raw_data[1] | (raw_data[2] << 8),
2065 raw_data[2], raw_data[1]);
2066 hid_debug_event(hdev, buff);
2067 break;
2068 case REPORT_VERSION:
2069 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2070 "REPORT_VERSION", report->id, raw_size-1);
2071 hid_debug_event(hdev, buff);
2072 break;
2073 case REPORT_DEVID:
2074 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2075 "REPORT_DEVID", report->id, raw_size-1);
2076 hid_debug_event(hdev, buff);
2077 break;
2078 case REPORT_SPLASH_SIZE:
2079 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2080 "REPORT_SPLASH_SIZE", report->id, raw_size-1);
2081 hid_debug_event(hdev, buff);
2082 break;
2083 case REPORT_HOOK_VERSION:
2084 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2085 "REPORT_HOOK_VERSION", report->id, raw_size-1);
2086 hid_debug_event(hdev, buff);
2087 break;
2088 case REPORT_EXIT_FLASHER:
2089 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2090 "REPORT_VERSION", report->id, raw_size-1);
2091 hid_debug_event(hdev, buff);
2092 snprintf(buff, BUFF_SZ, "\tRestart delay: %dms (0x%02x%02x)\n",
2093 raw_data[1] | (raw_data[2] << 8),
2094 raw_data[2], raw_data[1]);
2095 hid_debug_event(hdev, buff);
2096 break;
2097 default:
2098 snprintf(buff, BUFF_SZ, "out report %s (%d, size=%d)\n",
2099 "<unknown>", report->id, raw_size-1);
2100 hid_debug_event(hdev, buff);
2101 break;
2102 }
2103 wake_up_interruptible(&hdev->debug_wait);
2104 kfree(buff);
2105}
2106
2107static void picolcd_debug_raw_event(struct picolcd_data *data,
2108 struct hid_device *hdev, struct hid_report *report,
2109 u8 *raw_data, int size)
2110{
2111 char *buff;
2112
2113#define BUFF_SZ 256
2114 /* Avoid unnecessary overhead if debugfs is disabled */
2115 if (!hdev->debug_events)
2116 return;
2117
2118 buff = kmalloc(BUFF_SZ, GFP_ATOMIC);
2119 if (!buff)
2120 return;
2121
2122 switch (report->id) {
2123 case REPORT_ERROR_CODE:
2124 /* 2 data bytes with affected report and error code */
2125 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2126 "REPORT_ERROR_CODE", report->id, size-1);
2127 hid_debug_event(hdev, buff);
2128 if (raw_data[2] < ARRAY_SIZE(error_codes))
2129 snprintf(buff, BUFF_SZ, "\tError code 0x%02x (%s) in reply to report 0x%02x\n",
2130 raw_data[2], error_codes[raw_data[2]], raw_data[1]);
2131 else
2132 snprintf(buff, BUFF_SZ, "\tError code 0x%02x in reply to report 0x%02x\n",
2133 raw_data[2], raw_data[1]);
2134 hid_debug_event(hdev, buff);
2135 break;
2136 case REPORT_KEY_STATE:
2137 /* 2 data bytes with key state */
2138 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2139 "REPORT_KEY_STATE", report->id, size-1);
2140 hid_debug_event(hdev, buff);
2141 if (raw_data[1] == 0)
2142 snprintf(buff, BUFF_SZ, "\tNo key pressed\n");
2143 else if (raw_data[2] == 0)
2144 snprintf(buff, BUFF_SZ, "\tOne key pressed: 0x%02x (%d)\n",
2145 raw_data[1], raw_data[1]);
2146 else
2147 snprintf(buff, BUFF_SZ, "\tTwo keys pressed: 0x%02x (%d), 0x%02x (%d)\n",
2148 raw_data[1], raw_data[1], raw_data[2], raw_data[2]);
2149 hid_debug_event(hdev, buff);
2150 break;
2151 case REPORT_IR_DATA:
2152 /* Up to 20 byes of IR scancode data */
2153 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2154 "REPORT_IR_DATA", report->id, size-1);
2155 hid_debug_event(hdev, buff);
2156 if (raw_data[1] == 0) {
2157 snprintf(buff, BUFF_SZ, "\tUnexpectedly 0 data length\n");
2158 hid_debug_event(hdev, buff);
2159 } else if (raw_data[1] + 1 <= size) {
2160 snprintf(buff, BUFF_SZ, "\tData length: %d\n\tIR Data: ",
2161 raw_data[1]-1);
2162 hid_debug_event(hdev, buff);
2163 dump_buff_as_hex(buff, BUFF_SZ, raw_data+2, raw_data[1]-1);
2164 hid_debug_event(hdev, buff);
2165 } else {
2166 snprintf(buff, BUFF_SZ, "\tOverflowing data length: %d\n",
2167 raw_data[1]-1);
2168 hid_debug_event(hdev, buff);
2169 }
2170 break;
2171 case REPORT_EE_DATA:
2172 /* Data buffer in response to REPORT_EE_READ or REPORT_EE_WRITE */
2173 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2174 "REPORT_EE_DATA", report->id, size-1);
2175 hid_debug_event(hdev, buff);
2176 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
2177 raw_data[2], raw_data[1]);
2178 hid_debug_event(hdev, buff);
2179 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2180 hid_debug_event(hdev, buff);
2181 if (raw_data[3] == 0) {
2182 snprintf(buff, BUFF_SZ, "\tNo data\n");
2183 hid_debug_event(hdev, buff);
2184 } else if (raw_data[3] + 4 <= size) {
2185 snprintf(buff, BUFF_SZ, "\tData: ");
2186 hid_debug_event(hdev, buff);
2187 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
2188 hid_debug_event(hdev, buff);
2189 } else {
2190 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2191 hid_debug_event(hdev, buff);
2192 }
2193 break;
2194 case REPORT_MEMORY:
2195 /* Data buffer in response to REPORT_READ_MEMORY or REPORT_WRTIE_MEMORY */
2196 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2197 "REPORT_MEMORY", report->id, size-1);
2198 hid_debug_event(hdev, buff);
2199 switch (data->addr_sz) {
2200 case 2:
2201 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x\n",
2202 raw_data[2], raw_data[1]);
2203 hid_debug_event(hdev, buff);
2204 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[3]);
2205 hid_debug_event(hdev, buff);
2206 if (raw_data[3] == 0) {
2207 snprintf(buff, BUFF_SZ, "\tNo data\n");
2208 } else if (raw_data[3] + 4 <= size) {
2209 snprintf(buff, BUFF_SZ, "\tData: ");
2210 hid_debug_event(hdev, buff);
2211 dump_buff_as_hex(buff, BUFF_SZ, raw_data+4, raw_data[3]);
2212 } else {
2213 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2214 }
2215 break;
2216 case 3:
2217 snprintf(buff, BUFF_SZ, "\tData address: 0x%02x%02x%02x\n",
2218 raw_data[3], raw_data[2], raw_data[1]);
2219 hid_debug_event(hdev, buff);
2220 snprintf(buff, BUFF_SZ, "\tData length: %d\n", raw_data[4]);
2221 hid_debug_event(hdev, buff);
2222 if (raw_data[4] == 0) {
2223 snprintf(buff, BUFF_SZ, "\tNo data\n");
2224 } else if (raw_data[4] + 5 <= size) {
2225 snprintf(buff, BUFF_SZ, "\tData: ");
2226 hid_debug_event(hdev, buff);
2227 dump_buff_as_hex(buff, BUFF_SZ, raw_data+5, raw_data[4]);
2228 } else {
2229 snprintf(buff, BUFF_SZ, "\tData overflowed\n");
2230 }
2231 break;
2232 default:
2233 snprintf(buff, BUFF_SZ, "\tNot supported\n");
2234 }
2235 hid_debug_event(hdev, buff);
2236 break;
2237 case REPORT_VERSION:
2238 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2239 "REPORT_VERSION", report->id, size-1);
2240 hid_debug_event(hdev, buff);
2241 snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
2242 raw_data[2], raw_data[1]);
2243 hid_debug_event(hdev, buff);
2244 break;
2245 case REPORT_BL_ERASE_MEMORY:
2246 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2247 "REPORT_BL_ERASE_MEMORY", report->id, size-1);
2248 hid_debug_event(hdev, buff);
2249 /* TODO */
2250 break;
2251 case REPORT_BL_READ_MEMORY:
2252 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2253 "REPORT_BL_READ_MEMORY", report->id, size-1);
2254 hid_debug_event(hdev, buff);
2255 /* TODO */
2256 break;
2257 case REPORT_BL_WRITE_MEMORY:
2258 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2259 "REPORT_BL_WRITE_MEMORY", report->id, size-1);
2260 hid_debug_event(hdev, buff);
2261 /* TODO */
2262 break;
2263 case REPORT_DEVID:
2264 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2265 "REPORT_DEVID", report->id, size-1);
2266 hid_debug_event(hdev, buff);
2267 snprintf(buff, BUFF_SZ, "\tSerial: 0x%02x%02x%02x%02x\n",
2268 raw_data[1], raw_data[2], raw_data[3], raw_data[4]);
2269 hid_debug_event(hdev, buff);
2270 snprintf(buff, BUFF_SZ, "\tType: 0x%02x\n",
2271 raw_data[5]);
2272 hid_debug_event(hdev, buff);
2273 break;
2274 case REPORT_SPLASH_SIZE:
2275 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2276 "REPORT_SPLASH_SIZE", report->id, size-1);
2277 hid_debug_event(hdev, buff);
2278 snprintf(buff, BUFF_SZ, "\tTotal splash space: %d\n",
2279 (raw_data[2] << 8) | raw_data[1]);
2280 hid_debug_event(hdev, buff);
2281 snprintf(buff, BUFF_SZ, "\tUsed splash space: %d\n",
2282 (raw_data[4] << 8) | raw_data[3]);
2283 hid_debug_event(hdev, buff);
2284 break;
2285 case REPORT_HOOK_VERSION:
2286 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2287 "REPORT_HOOK_VERSION", report->id, size-1);
2288 hid_debug_event(hdev, buff);
2289 snprintf(buff, BUFF_SZ, "\tFirmware version: %d.%d\n",
2290 raw_data[1], raw_data[2]);
2291 hid_debug_event(hdev, buff);
2292 break;
2293 default:
2294 snprintf(buff, BUFF_SZ, "report %s (%d, size=%d)\n",
2295 "<unknown>", report->id, size-1);
2296 hid_debug_event(hdev, buff);
2297 break;
2298 }
2299 wake_up_interruptible(&hdev->debug_wait);
2300 kfree(buff);
2301}
2302
2303static void picolcd_init_devfs(struct picolcd_data *data,
2304 struct hid_report *eeprom_r, struct hid_report *eeprom_w,
2305 struct hid_report *flash_r, struct hid_report *flash_w,
2306 struct hid_report *reset)
2307{
2308 struct hid_device *hdev = data->hdev;
2309
2310 mutex_init(&data->mutex_flash);
2311
2312 /* reset */
2313 if (reset)
2314 data->debug_reset = debugfs_create_file("reset", 0600,
2315 hdev->debug_dir, data, &picolcd_debug_reset_fops);
2316
2317 /* eeprom */
2318 if (eeprom_r || eeprom_w)
2319 data->debug_eeprom = debugfs_create_file("eeprom",
2320 (eeprom_w ? S_IWUSR : 0) | (eeprom_r ? S_IRUSR : 0),
2321 hdev->debug_dir, data, &picolcd_debug_eeprom_fops);
2322
2323 /* flash */
2324 if (flash_r && flash_r->maxfield == 1 && flash_r->field[0]->report_size == 8)
2325 data->addr_sz = flash_r->field[0]->report_count - 1;
2326 else
2327 data->addr_sz = -1;
2328 if (data->addr_sz == 2 || data->addr_sz == 3) {
2329 data->debug_flash = debugfs_create_file("flash",
2330 (flash_w ? S_IWUSR : 0) | (flash_r ? S_IRUSR : 0),
2331 hdev->debug_dir, data, &picolcd_debug_flash_fops);
2332 } else if (flash_r || flash_w)
2333 hid_warn(hdev, "Unexpected FLASH access reports, please submit rdesc for review\n");
2334}
2335
2336static void picolcd_exit_devfs(struct picolcd_data *data)
2337{
2338 struct dentry *dent;
2339
2340 dent = data->debug_reset;
2341 data->debug_reset = NULL;
2342 if (dent)
2343 debugfs_remove(dent);
2344 dent = data->debug_eeprom;
2345 data->debug_eeprom = NULL;
2346 if (dent)
2347 debugfs_remove(dent);
2348 dent = data->debug_flash;
2349 data->debug_flash = NULL;
2350 if (dent)
2351 debugfs_remove(dent);
2352 mutex_destroy(&data->mutex_flash);
2353}
2354#else
2355static inline void picolcd_debug_raw_event(struct picolcd_data *data,
2356 struct hid_device *hdev, struct hid_report *report,
2357 u8 *raw_data, int size)
2358{
2359}
2360static inline void picolcd_init_devfs(struct picolcd_data *data,
2361 struct hid_report *eeprom_r, struct hid_report *eeprom_w,
2362 struct hid_report *flash_r, struct hid_report *flash_w,
2363 struct hid_report *reset)
2364{
2365}
2366static inline void picolcd_exit_devfs(struct picolcd_data *data)
2367{
2368}
2369#endif /* CONFIG_DEBUG_FS */
2370
2371/*
2372 * Handle raw report as sent by device
2373 */
2374static int picolcd_raw_event(struct hid_device *hdev,
2375 struct hid_report *report, u8 *raw_data, int size)
2376{
2377 struct picolcd_data *data = hid_get_drvdata(hdev);
2378 unsigned long flags;
2379 int ret = 0;
2380
2381 if (!data)
2382 return 1;
2383
2384 if (report->id == REPORT_KEY_STATE) {
2385 if (data->input_keys)
2386 ret = picolcd_raw_keypad(data, report, raw_data+1, size-1);
2387 } else if (report->id == REPORT_IR_DATA) {
2388 if (data->input_cir)
2389 ret = picolcd_raw_cir(data, report, raw_data+1, size-1);
2390 } else {
2391 spin_lock_irqsave(&data->lock, flags);
2392 /*
2393 * We let the caller of picolcd_send_and_wait() check if the
2394 * report we got is one of the expected ones or not.
2395 */
2396 if (data->pending) {
2397 memcpy(data->pending->raw_data, raw_data+1, size-1);
2398 data->pending->raw_size = size-1;
2399 data->pending->in_report = report;
2400 complete(&data->pending->ready);
2401 }
2402 spin_unlock_irqrestore(&data->lock, flags);
2403 }
2404
2405 picolcd_debug_raw_event(data, hdev, report, raw_data, size);
2406 return 1;
2407}
2408
2409#ifdef CONFIG_PM
2410static int picolcd_suspend(struct hid_device *hdev, pm_message_t message)
2411{
2412 if (message.event & PM_EVENT_AUTO)
2413 return 0;
2414
2415 picolcd_suspend_backlight(hid_get_drvdata(hdev));
2416 dbg_hid(PICOLCD_NAME " device ready for suspend\n");
2417 return 0;
2418}
2419
2420static int picolcd_resume(struct hid_device *hdev)
2421{
2422 int ret;
2423 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
2424 if (ret)
2425 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
2426 return 0;
2427}
2428
2429static int picolcd_reset_resume(struct hid_device *hdev)
2430{
2431 int ret;
2432 ret = picolcd_reset(hdev);
2433 if (ret)
2434 dbg_hid(PICOLCD_NAME " resetting our device failed: %d\n", ret);
2435 ret = picolcd_fb_reset(hid_get_drvdata(hdev), 0);
2436 if (ret)
2437 dbg_hid(PICOLCD_NAME " restoring framebuffer content failed: %d\n", ret);
2438 ret = picolcd_resume_lcd(hid_get_drvdata(hdev));
2439 if (ret)
2440 dbg_hid(PICOLCD_NAME " restoring lcd failed: %d\n", ret);
2441 ret = picolcd_resume_backlight(hid_get_drvdata(hdev));
2442 if (ret)
2443 dbg_hid(PICOLCD_NAME " restoring backlight failed: %d\n", ret);
2444 picolcd_leds_set(hid_get_drvdata(hdev));
2445 return 0;
2446}
2447#endif
2448
2449/* initialize keypad input device */
2450static int picolcd_init_keys(struct picolcd_data *data,
2451 struct hid_report *report)
2452{
2453 struct hid_device *hdev = data->hdev;
2454 struct input_dev *idev;
2455 int error, i;
2456
2457 if (!report)
2458 return -ENODEV;
2459 if (report->maxfield != 1 || report->field[0]->report_count != 2 ||
2460 report->field[0]->report_size != 8) {
2461 hid_err(hdev, "unsupported KEY_STATE report\n");
2462 return -EINVAL;
2463 }
2464
2465 idev = input_allocate_device();
2466 if (idev == NULL) {
2467 hid_err(hdev, "failed to allocate input device\n");
2468 return -ENOMEM;
2469 }
2470 input_set_drvdata(idev, hdev);
2471 memcpy(data->keycode, def_keymap, sizeof(def_keymap));
2472 idev->name = hdev->name;
2473 idev->phys = hdev->phys;
2474 idev->uniq = hdev->uniq;
2475 idev->id.bustype = hdev->bus;
2476 idev->id.vendor = hdev->vendor;
2477 idev->id.product = hdev->product;
2478 idev->id.version = hdev->version;
2479 idev->dev.parent = hdev->dev.parent;
2480 idev->keycode = &data->keycode;
2481 idev->keycodemax = PICOLCD_KEYS;
2482 idev->keycodesize = sizeof(data->keycode[0]);
2483 input_set_capability(idev, EV_MSC, MSC_SCAN);
2484 set_bit(EV_REP, idev->evbit);
2485 for (i = 0; i < PICOLCD_KEYS; i++)
2486 input_set_capability(idev, EV_KEY, data->keycode[i]);
2487 error = input_register_device(idev);
2488 if (error) {
2489 hid_err(hdev, "error registering the input device\n");
2490 input_free_device(idev);
2491 return error;
2492 }
2493 data->input_keys = idev;
2494 return 0;
2495}
2496
2497static void picolcd_exit_keys(struct picolcd_data *data)
2498{
2499 struct input_dev *idev = data->input_keys;
2500
2501 data->input_keys = NULL;
2502 if (idev)
2503 input_unregister_device(idev);
2504}
2505
2506/* initialize CIR input device */
2507static inline int picolcd_init_cir(struct picolcd_data *data, struct hid_report *report)
2508{
2509 /* support not implemented yet */
2510 return 0;
2511}
2512
2513static inline void picolcd_exit_cir(struct picolcd_data *data)
2514{
2515}
2516
2517static int picolcd_probe_lcd(struct hid_device *hdev, struct picolcd_data *data)
2518{
2519 int error;
2520
2521 error = picolcd_check_version(hdev);
2522 if (error)
2523 return error;
2524
2525 if (data->version[0] != 0 && data->version[1] != 3)
2526 hid_info(hdev, "Device with untested firmware revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
2527 dev_name(&hdev->dev));
2528
2529 /* Setup keypad input device */
2530 error = picolcd_init_keys(data, picolcd_in_report(REPORT_KEY_STATE, hdev));
2531 if (error)
2532 goto err;
2533
2534 /* Setup CIR input device */
2535 error = picolcd_init_cir(data, picolcd_in_report(REPORT_IR_DATA, hdev));
2536 if (error)
2537 goto err;
2538
2539 /* Set up the framebuffer device */
2540 error = picolcd_init_framebuffer(data);
2541 if (error)
2542 goto err;
2543
2544 /* Setup lcd class device */
2545 error = picolcd_init_lcd(data, picolcd_out_report(REPORT_CONTRAST, hdev));
2546 if (error)
2547 goto err;
2548
2549 /* Setup backlight class device */
2550 error = picolcd_init_backlight(data, picolcd_out_report(REPORT_BRIGHTNESS, hdev));
2551 if (error)
2552 goto err;
2553
2554 /* Setup the LED class devices */
2555 error = picolcd_init_leds(data, picolcd_out_report(REPORT_LED_STATE, hdev));
2556 if (error)
2557 goto err;
2558
2559 picolcd_init_devfs(data, picolcd_out_report(REPORT_EE_READ, hdev),
2560 picolcd_out_report(REPORT_EE_WRITE, hdev),
2561 picolcd_out_report(REPORT_READ_MEMORY, hdev),
2562 picolcd_out_report(REPORT_WRITE_MEMORY, hdev),
2563 picolcd_out_report(REPORT_RESET, hdev));
2564 return 0;
2565err:
2566 picolcd_exit_leds(data);
2567 picolcd_exit_backlight(data);
2568 picolcd_exit_lcd(data);
2569 picolcd_exit_framebuffer(data);
2570 picolcd_exit_cir(data);
2571 picolcd_exit_keys(data);
2572 return error;
2573}
2574
2575static int picolcd_probe_bootloader(struct hid_device *hdev, struct picolcd_data *data)
2576{
2577 int error;
2578
2579 error = picolcd_check_version(hdev);
2580 if (error)
2581 return error;
2582
2583 if (data->version[0] != 1 && data->version[1] != 0)
2584 hid_info(hdev, "Device with untested bootloader revision, please submit /sys/kernel/debug/hid/%s/rdesc for this device.\n",
2585 dev_name(&hdev->dev));
2586
2587 picolcd_init_devfs(data, NULL, NULL,
2588 picolcd_out_report(REPORT_BL_READ_MEMORY, hdev),
2589 picolcd_out_report(REPORT_BL_WRITE_MEMORY, hdev), NULL);
2590 return 0;
2591}
2592
2593static int picolcd_probe(struct hid_device *hdev,
2594 const struct hid_device_id *id)
2595{
2596 struct picolcd_data *data;
2597 int error = -ENOMEM;
2598
2599 dbg_hid(PICOLCD_NAME " hardware probe...\n");
2600
2601 /*
2602 * Let's allocate the picolcd data structure, set some reasonable
2603 * defaults, and associate it with the device
2604 */
2605 data = kzalloc(sizeof(struct picolcd_data), GFP_KERNEL);
2606 if (data == NULL) {
2607 hid_err(hdev, "can't allocate space for Minibox PicoLCD device data\n");
2608 error = -ENOMEM;
2609 goto err_no_cleanup;
2610 }
2611
2612 spin_lock_init(&data->lock);
2613 mutex_init(&data->mutex);
2614 data->hdev = hdev;
2615 data->opmode_delay = 5000;
2616 if (hdev->product == USB_DEVICE_ID_PICOLCD_BOOTLOADER)
2617 data->status |= PICOLCD_BOOTLOADER;
2618 hid_set_drvdata(hdev, data);
2619
2620 /* Parse the device reports and start it up */
2621 error = hid_parse(hdev);
2622 if (error) {
2623 hid_err(hdev, "device report parse failed\n");
2624 goto err_cleanup_data;
2625 }
2626
2627 /* We don't use hidinput but hid_hw_start() fails if nothing is
2628 * claimed. So spoof claimed input. */
2629 hdev->claimed = HID_CLAIMED_INPUT;
2630 error = hid_hw_start(hdev, 0);
2631 hdev->claimed = 0;
2632 if (error) {
2633 hid_err(hdev, "hardware start failed\n");
2634 goto err_cleanup_data;
2635 }
2636
2637 error = hid_hw_open(hdev);
2638 if (error) {
2639 hid_err(hdev, "failed to open input interrupt pipe for key and IR events\n");
2640 goto err_cleanup_hid_hw;
2641 }
2642
2643 error = device_create_file(&hdev->dev, &dev_attr_operation_mode_delay);
2644 if (error) {
2645 hid_err(hdev, "failed to create sysfs attributes\n");
2646 goto err_cleanup_hid_ll;
2647 }
2648
2649 error = device_create_file(&hdev->dev, &dev_attr_operation_mode);
2650 if (error) {
2651 hid_err(hdev, "failed to create sysfs attributes\n");
2652 goto err_cleanup_sysfs1;
2653 }
2654
2655 if (data->status & PICOLCD_BOOTLOADER)
2656 error = picolcd_probe_bootloader(hdev, data);
2657 else
2658 error = picolcd_probe_lcd(hdev, data);
2659 if (error)
2660 goto err_cleanup_sysfs2;
2661
2662 dbg_hid(PICOLCD_NAME " activated and initialized\n");
2663 return 0;
2664
2665err_cleanup_sysfs2:
2666 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
2667err_cleanup_sysfs1:
2668 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
2669err_cleanup_hid_ll:
2670 hid_hw_close(hdev);
2671err_cleanup_hid_hw:
2672 hid_hw_stop(hdev);
2673err_cleanup_data:
2674 kfree(data);
2675err_no_cleanup:
2676 hid_set_drvdata(hdev, NULL);
2677
2678 return error;
2679}
2680
2681static void picolcd_remove(struct hid_device *hdev)
2682{
2683 struct picolcd_data *data = hid_get_drvdata(hdev);
2684 unsigned long flags;
2685
2686 dbg_hid(PICOLCD_NAME " hardware remove...\n");
2687 spin_lock_irqsave(&data->lock, flags);
2688 data->status |= PICOLCD_FAILED;
2689 spin_unlock_irqrestore(&data->lock, flags);
2690#ifdef CONFIG_HID_PICOLCD_FB
2691 /* short-circuit FB as early as possible in order to
2692 * avoid long delays if we host console.
2693 */
2694 if (data->fb_info)
2695 data->fb_info->par = NULL;
2696#endif
2697
2698 picolcd_exit_devfs(data);
2699 device_remove_file(&hdev->dev, &dev_attr_operation_mode);
2700 device_remove_file(&hdev->dev, &dev_attr_operation_mode_delay);
2701 hid_hw_close(hdev);
2702 hid_hw_stop(hdev);
2703 hid_set_drvdata(hdev, NULL);
2704
2705 /* Shortcut potential pending reply that will never arrive */
2706 spin_lock_irqsave(&data->lock, flags);
2707 if (data->pending)
2708 complete(&data->pending->ready);
2709 spin_unlock_irqrestore(&data->lock, flags);
2710
2711 /* Cleanup LED */
2712 picolcd_exit_leds(data);
2713 /* Clean up the framebuffer */
2714 picolcd_exit_backlight(data);
2715 picolcd_exit_lcd(data);
2716 picolcd_exit_framebuffer(data);
2717 /* Cleanup input */
2718 picolcd_exit_cir(data);
2719 picolcd_exit_keys(data);
2720
2721 mutex_destroy(&data->mutex);
2722 /* Finally, clean up the picolcd data itself */
2723 kfree(data);
2724}
2725
2726static const struct hid_device_id picolcd_devices[] = {
2727 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD) },
2728 { HID_USB_DEVICE(USB_VENDOR_ID_MICROCHIP, USB_DEVICE_ID_PICOLCD_BOOTLOADER) },
2729 { }
2730};
2731MODULE_DEVICE_TABLE(hid, picolcd_devices);
2732
2733static struct hid_driver picolcd_driver = {
2734 .name = "hid-picolcd",
2735 .id_table = picolcd_devices,
2736 .probe = picolcd_probe,
2737 .remove = picolcd_remove,
2738 .raw_event = picolcd_raw_event,
2739#ifdef CONFIG_PM
2740 .suspend = picolcd_suspend,
2741 .resume = picolcd_resume,
2742 .reset_resume = picolcd_reset_resume,
2743#endif
2744};
2745
2746static int __init picolcd_init(void)
2747{
2748 return hid_register_driver(&picolcd_driver);
2749}
2750
2751static void __exit picolcd_exit(void)
2752{
2753 hid_unregister_driver(&picolcd_driver);
2754#ifdef CONFIG_HID_PICOLCD_FB
2755 flush_work_sync(&picolcd_fb_cleanup);
2756 WARN_ON(fb_pending);
2757#endif
2758}
2759
2760module_init(picolcd_init);
2761module_exit(picolcd_exit);
2762MODULE_DESCRIPTION("Minibox graphics PicoLCD Driver");
2763MODULE_LICENSE("GPL v2");