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1da177e4 LT |
1 | /* |
2 | * Zoran ZR36016 basic configuration functions | |
3 | * | |
4 | * Copyright (C) 2001 Wolfgang Scherr <scherr@net4you.at> | |
5 | * | |
6 | * $Id: zr36016.c,v 1.1.2.14 2003/08/20 19:46:55 rbultje Exp $ | |
7 | * | |
8 | * ------------------------------------------------------------------------ | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
24 | * ------------------------------------------------------------------------ | |
25 | */ | |
26 | ||
27 | #define ZR016_VERSION "v0.7" | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/init.h> | |
31 | #include <linux/slab.h> | |
32 | #include <linux/delay.h> | |
33 | ||
34 | #include <linux/types.h> | |
35 | #include <linux/wait.h> | |
36 | ||
d56410e0 | 37 | /* includes for structures and defines regarding video |
1da177e4 LT |
38 | #include<linux/videodev.h> */ |
39 | ||
40 | /* I/O commands, error codes */ | |
41 | #include<asm/io.h> | |
42 | //#include<errno.h> | |
43 | ||
44 | /* v4l API */ | |
45 | #include<linux/videodev.h> | |
46 | ||
47 | /* headerfile of this module */ | |
48 | #include"zr36016.h" | |
49 | ||
50 | /* codec io API */ | |
51 | #include"videocodec.h" | |
52 | ||
53 | /* it doesn't make sense to have more than 20 or so, | |
54 | just to prevent some unwanted loops */ | |
55 | #define MAX_CODECS 20 | |
56 | ||
57 | /* amount of chips attached via this driver */ | |
58 | static int zr36016_codecs = 0; | |
59 | ||
60 | /* debugging is available via module parameter */ | |
61 | ||
62 | static int debug = 0; | |
63 | module_param(debug, int, 0); | |
64 | MODULE_PARM_DESC(debug, "Debug level (0-4)"); | |
65 | ||
66 | #define dprintk(num, format, args...) \ | |
67 | do { \ | |
68 | if (debug >= num) \ | |
69 | printk(format, ##args); \ | |
70 | } while (0) | |
71 | ||
72 | /* ========================================================================= | |
73 | Local hardware I/O functions: | |
74 | ||
75 | read/write via codec layer (registers are located in the master device) | |
76 | ========================================================================= */ | |
77 | ||
78 | /* read and write functions */ | |
79 | static u8 | |
80 | zr36016_read (struct zr36016 *ptr, | |
81 | u16 reg) | |
82 | { | |
83 | u8 value = 0; | |
84 | ||
85 | // just in case something is wrong... | |
86 | if (ptr->codec->master_data->readreg) | |
87 | value = | |
88 | (ptr->codec->master_data-> | |
89 | readreg(ptr->codec, reg)) & 0xFF; | |
90 | else | |
91 | dprintk(1, | |
92 | KERN_ERR "%s: invalid I/O setup, nothing read!\n", | |
93 | ptr->name); | |
94 | ||
95 | dprintk(4, "%s: reading from 0x%04x: %02x\n", ptr->name, reg, | |
96 | value); | |
97 | ||
98 | return value; | |
99 | } | |
100 | ||
101 | static void | |
102 | zr36016_write (struct zr36016 *ptr, | |
103 | u16 reg, | |
104 | u8 value) | |
105 | { | |
106 | dprintk(4, "%s: writing 0x%02x to 0x%04x\n", ptr->name, value, | |
107 | reg); | |
108 | ||
109 | // just in case something is wrong... | |
110 | if (ptr->codec->master_data->writereg) { | |
111 | ptr->codec->master_data->writereg(ptr->codec, reg, value); | |
112 | } else | |
113 | dprintk(1, | |
114 | KERN_ERR | |
115 | "%s: invalid I/O setup, nothing written!\n", | |
116 | ptr->name); | |
117 | } | |
118 | ||
119 | /* indirect read and write functions */ | |
120 | /* the 016 supports auto-addr-increment, but | |
121 | * writing it all time cost not much and is safer... */ | |
122 | static u8 | |
123 | zr36016_readi (struct zr36016 *ptr, | |
124 | u16 reg) | |
125 | { | |
126 | u8 value = 0; | |
127 | ||
128 | // just in case something is wrong... | |
129 | if ((ptr->codec->master_data->writereg) && | |
130 | (ptr->codec->master_data->readreg)) { | |
131 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR | |
132 | value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA | |
133 | } else | |
134 | dprintk(1, | |
135 | KERN_ERR | |
136 | "%s: invalid I/O setup, nothing read (i)!\n", | |
137 | ptr->name); | |
138 | ||
139 | dprintk(4, "%s: reading indirect from 0x%04x: %02x\n", ptr->name, | |
140 | reg, value); | |
141 | return value; | |
142 | } | |
143 | ||
144 | static void | |
145 | zr36016_writei (struct zr36016 *ptr, | |
d56410e0 MCC |
146 | u16 reg, |
147 | u8 value) | |
1da177e4 LT |
148 | { |
149 | dprintk(4, "%s: writing indirect 0x%02x to 0x%04x\n", ptr->name, | |
150 | value, reg); | |
151 | ||
152 | // just in case something is wrong... | |
153 | if (ptr->codec->master_data->writereg) { | |
154 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR | |
155 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA | |
156 | } else | |
157 | dprintk(1, | |
158 | KERN_ERR | |
159 | "%s: invalid I/O setup, nothing written (i)!\n", | |
160 | ptr->name); | |
161 | } | |
162 | ||
163 | /* ========================================================================= | |
164 | Local helper function: | |
165 | ||
166 | version read | |
167 | ========================================================================= */ | |
168 | ||
169 | /* version kept in datastructure */ | |
170 | static u8 | |
171 | zr36016_read_version (struct zr36016 *ptr) | |
172 | { | |
173 | ptr->version = zr36016_read(ptr, 0) >> 4; | |
174 | return ptr->version; | |
175 | } | |
176 | ||
177 | /* ========================================================================= | |
178 | Local helper function: | |
179 | ||
180 | basic test of "connectivity", writes/reads to/from PAX-Lo register | |
181 | ========================================================================= */ | |
182 | ||
183 | static int | |
184 | zr36016_basic_test (struct zr36016 *ptr) | |
185 | { | |
186 | if (debug) { | |
187 | int i; | |
188 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x55); | |
189 | dprintk(1, KERN_INFO "%s: registers: ", ptr->name); | |
190 | for (i = 0; i <= 0x0b; i++) | |
191 | dprintk(1, "%02x ", zr36016_readi(ptr, i)); | |
192 | dprintk(1, "\n"); | |
193 | } | |
194 | // for testing just write 0, then the default value to a register and read | |
d56410e0 | 195 | // it back in both cases |
1da177e4 LT |
196 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x00); |
197 | if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) { | |
198 | dprintk(1, | |
199 | KERN_ERR | |
200 | "%s: attach failed, can't connect to vfe processor!\n", | |
201 | ptr->name); | |
202 | return -ENXIO; | |
203 | } | |
204 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0); | |
205 | if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) { | |
206 | dprintk(1, | |
207 | KERN_ERR | |
208 | "%s: attach failed, can't connect to vfe processor!\n", | |
209 | ptr->name); | |
210 | return -ENXIO; | |
211 | } | |
212 | // we allow version numbers from 0-3, should be enough, though | |
213 | zr36016_read_version(ptr); | |
214 | if (ptr->version & 0x0c) { | |
215 | dprintk(1, | |
216 | KERN_ERR | |
217 | "%s: attach failed, suspicious version %d found...\n", | |
218 | ptr->name, ptr->version); | |
219 | return -ENXIO; | |
220 | } | |
221 | ||
222 | return 0; /* looks good! */ | |
223 | } | |
224 | ||
225 | /* ========================================================================= | |
226 | Local helper function: | |
227 | ||
228 | simple loop for pushing the init datasets - NO USE -- | |
229 | ========================================================================= */ | |
230 | ||
231 | #if 0 | |
232 | static int zr36016_pushit (struct zr36016 *ptr, | |
233 | u16 startreg, | |
234 | u16 len, | |
d56410e0 | 235 | const char *data) |
1da177e4 | 236 | { |
d56410e0 | 237 | int i=0; |
1da177e4 | 238 | |
d56410e0 | 239 | dprintk(4, "%s: write data block to 0x%04x (len=%d)\n", |
1da177e4 | 240 | ptr->name, startreg,len); |
d56410e0 MCC |
241 | while (i<len) { |
242 | zr36016_writei(ptr, startreg++, data[i++]); | |
243 | } | |
1da177e4 | 244 | |
d56410e0 | 245 | return i; |
1da177e4 LT |
246 | } |
247 | #endif | |
248 | ||
249 | /* ========================================================================= | |
250 | Basic datasets & init: | |
251 | ||
252 | //TODO// | |
253 | ========================================================================= */ | |
254 | ||
255 | // needed offset values PAL NTSC SECAM | |
256 | static const int zr016_xoff[] = { 20, 20, 20 }; | |
257 | static const int zr016_yoff[] = { 8, 9, 7 }; | |
258 | ||
259 | static void | |
260 | zr36016_init (struct zr36016 *ptr) | |
261 | { | |
262 | // stop any processing | |
263 | zr36016_write(ptr, ZR016_GOSTOP, 0); | |
264 | ||
265 | // mode setup (yuv422 in and out, compression/expansuon due to mode) | |
266 | zr36016_write(ptr, ZR016_MODE, | |
267 | ZR016_YUV422 | ZR016_YUV422_YUV422 | | |
268 | (ptr->mode == CODEC_DO_COMPRESSION ? | |
269 | ZR016_COMPRESSION : ZR016_EXPANSION)); | |
270 | ||
271 | // misc setup | |
272 | zr36016_writei(ptr, ZR016I_SETUP1, | |
273 | (ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0) | | |
274 | (ptr->ydec ? ZR016_VERT : 0) | ZR016_CNTI); | |
275 | zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR); | |
276 | ||
277 | // Window setup | |
278 | // (no extra offset for now, norm defines offset, default width height) | |
279 | zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8); | |
280 | zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0xFF); | |
281 | zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8); | |
282 | zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF); | |
283 | zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8); | |
284 | zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF); | |
285 | zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8); | |
286 | zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF); | |
287 | ||
288 | /* shall we continue now, please? */ | |
289 | zr36016_write(ptr, ZR016_GOSTOP, 1); | |
290 | } | |
291 | ||
292 | /* ========================================================================= | |
293 | CODEC API FUNCTIONS | |
294 | ||
295 | this functions are accessed by the master via the API structure | |
296 | ========================================================================= */ | |
297 | ||
298 | /* set compression/expansion mode and launches codec - | |
299 | this should be the last call from the master before starting processing */ | |
300 | static int | |
301 | zr36016_set_mode (struct videocodec *codec, | |
302 | int mode) | |
303 | { | |
304 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
305 | ||
306 | dprintk(2, "%s: set_mode %d call\n", ptr->name, mode); | |
307 | ||
308 | if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION)) | |
309 | return -EINVAL; | |
310 | ||
311 | ptr->mode = mode; | |
312 | zr36016_init(ptr); | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | /* set picture size */ | |
318 | static int | |
319 | zr36016_set_video (struct videocodec *codec, | |
320 | struct tvnorm *norm, | |
321 | struct vfe_settings *cap, | |
322 | struct vfe_polarity *pol) | |
323 | { | |
324 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
325 | ||
326 | dprintk(2, "%s: set_video %d.%d, %d/%d-%dx%d (0x%x) call\n", | |
327 | ptr->name, norm->HStart, norm->VStart, | |
328 | cap->x, cap->y, cap->width, cap->height, | |
329 | cap->decimation); | |
330 | ||
331 | /* if () return -EINVAL; | |
332 | * trust the master driver that it knows what it does - so | |
333 | * we allow invalid startx/y for now ... */ | |
334 | ptr->width = cap->width; | |
335 | ptr->height = cap->height; | |
336 | /* (Ronald) This is ugly. zoran_device.c, line 387 | |
337 | * already mentions what happens if HStart is even | |
338 | * (blue faces, etc., cr/cb inversed). There's probably | |
339 | * some good reason why HStart is 0 instead of 1, so I'm | |
340 | * leaving it to this for now, but really... This can be | |
341 | * done a lot simpler */ | |
342 | ptr->xoff = (norm->HStart ? norm->HStart : 1) + cap->x; | |
343 | /* Something to note here (I don't understand it), setting | |
344 | * VStart too high will cause the codec to 'not work'. I | |
345 | * really don't get it. values of 16 (VStart) already break | |
346 | * it here. Just '0' seems to work. More testing needed! */ | |
347 | ptr->yoff = norm->VStart + cap->y; | |
348 | /* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */ | |
349 | ptr->xdec = ((cap->decimation & 0xff) == 1) ? 0 : 1; | |
350 | ptr->ydec = (((cap->decimation >> 8) & 0xff) == 1) ? 0 : 1; | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
355 | /* additional control functions */ | |
356 | static int | |
357 | zr36016_control (struct videocodec *codec, | |
358 | int type, | |
359 | int size, | |
360 | void *data) | |
361 | { | |
362 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
363 | int *ival = (int *) data; | |
364 | ||
365 | dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type, | |
366 | size); | |
367 | ||
368 | switch (type) { | |
369 | case CODEC_G_STATUS: /* get last status - we don't know it ... */ | |
370 | if (size != sizeof(int)) | |
371 | return -EFAULT; | |
372 | *ival = 0; | |
373 | break; | |
374 | ||
375 | case CODEC_G_CODEC_MODE: | |
376 | if (size != sizeof(int)) | |
377 | return -EFAULT; | |
378 | *ival = 0; | |
379 | break; | |
380 | ||
381 | case CODEC_S_CODEC_MODE: | |
382 | if (size != sizeof(int)) | |
383 | return -EFAULT; | |
384 | if (*ival != 0) | |
385 | return -EINVAL; | |
386 | /* not needed, do nothing */ | |
387 | return 0; | |
388 | ||
389 | case CODEC_G_VFE: | |
390 | case CODEC_S_VFE: | |
391 | return 0; | |
392 | ||
393 | case CODEC_S_MMAP: | |
394 | /* not available, give an error */ | |
395 | return -ENXIO; | |
396 | ||
397 | default: | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | return size; | |
402 | } | |
403 | ||
404 | /* ========================================================================= | |
405 | Exit and unregister function: | |
406 | ||
407 | Deinitializes Zoran's JPEG processor | |
408 | ========================================================================= */ | |
409 | ||
410 | static int | |
411 | zr36016_unset (struct videocodec *codec) | |
412 | { | |
413 | struct zr36016 *ptr = codec->data; | |
414 | ||
415 | if (ptr) { | |
416 | /* do wee need some codec deinit here, too ???? */ | |
417 | ||
418 | dprintk(1, "%s: finished codec #%d\n", ptr->name, | |
419 | ptr->num); | |
420 | kfree(ptr); | |
421 | codec->data = NULL; | |
422 | ||
423 | zr36016_codecs--; | |
424 | return 0; | |
425 | } | |
426 | ||
427 | return -EFAULT; | |
428 | } | |
429 | ||
430 | /* ========================================================================= | |
431 | Setup and registry function: | |
432 | ||
433 | Initializes Zoran's JPEG processor | |
434 | ||
435 | Also sets pixel size, average code size, mode (compr./decompr.) | |
436 | (the given size is determined by the processor with the video interface) | |
437 | ========================================================================= */ | |
438 | ||
439 | static int | |
440 | zr36016_setup (struct videocodec *codec) | |
441 | { | |
442 | struct zr36016 *ptr; | |
443 | int res; | |
444 | ||
445 | dprintk(2, "zr36016: initializing VFE subsystem #%d.\n", | |
446 | zr36016_codecs); | |
447 | ||
448 | if (zr36016_codecs == MAX_CODECS) { | |
449 | dprintk(1, | |
450 | KERN_ERR "zr36016: Can't attach more codecs!\n"); | |
451 | return -ENOSPC; | |
452 | } | |
453 | //mem structure init | |
7408187d | 454 | codec->data = ptr = kzalloc(sizeof(struct zr36016), GFP_KERNEL); |
1da177e4 LT |
455 | if (NULL == ptr) { |
456 | dprintk(1, KERN_ERR "zr36016: Can't get enough memory!\n"); | |
457 | return -ENOMEM; | |
458 | } | |
1da177e4 LT |
459 | |
460 | snprintf(ptr->name, sizeof(ptr->name), "zr36016[%d]", | |
461 | zr36016_codecs); | |
462 | ptr->num = zr36016_codecs++; | |
463 | ptr->codec = codec; | |
464 | ||
465 | //testing | |
466 | res = zr36016_basic_test(ptr); | |
467 | if (res < 0) { | |
468 | zr36016_unset(codec); | |
469 | return res; | |
470 | } | |
471 | //final setup | |
472 | ptr->mode = CODEC_DO_COMPRESSION; | |
473 | ptr->width = 768; | |
474 | ptr->height = 288; | |
475 | ptr->xdec = 1; | |
476 | ptr->ydec = 0; | |
477 | zr36016_init(ptr); | |
478 | ||
479 | dprintk(1, KERN_INFO "%s: codec v%d attached and running\n", | |
480 | ptr->name, ptr->version); | |
481 | ||
482 | return 0; | |
483 | } | |
484 | ||
485 | static const struct videocodec zr36016_codec = { | |
486 | .owner = THIS_MODULE, | |
487 | .name = "zr36016", | |
488 | .magic = 0L, // magic not used | |
489 | .flags = | |
490 | CODEC_FLAG_HARDWARE | CODEC_FLAG_VFE | CODEC_FLAG_ENCODER | | |
491 | CODEC_FLAG_DECODER, | |
492 | .type = CODEC_TYPE_ZR36016, | |
493 | .setup = zr36016_setup, // functionality | |
494 | .unset = zr36016_unset, | |
495 | .set_mode = zr36016_set_mode, | |
496 | .set_video = zr36016_set_video, | |
497 | .control = zr36016_control, | |
498 | // others are not used | |
499 | }; | |
500 | ||
501 | /* ========================================================================= | |
502 | HOOK IN DRIVER AS KERNEL MODULE | |
503 | ========================================================================= */ | |
504 | ||
505 | static int __init | |
506 | zr36016_init_module (void) | |
507 | { | |
508 | //dprintk(1, "ZR36016 driver %s\n",ZR016_VERSION); | |
509 | zr36016_codecs = 0; | |
510 | return videocodec_register(&zr36016_codec); | |
511 | } | |
512 | ||
513 | static void __exit | |
514 | zr36016_cleanup_module (void) | |
515 | { | |
516 | if (zr36016_codecs) { | |
517 | dprintk(1, | |
518 | "zr36016: something's wrong - %d codecs left somehow.\n", | |
519 | zr36016_codecs); | |
520 | } | |
521 | videocodec_unregister(&zr36016_codec); | |
522 | } | |
523 | ||
524 | module_init(zr36016_init_module); | |
525 | module_exit(zr36016_cleanup_module); | |
526 | ||
527 | MODULE_AUTHOR("Wolfgang Scherr <scherr@net4you.at>"); | |
528 | MODULE_DESCRIPTION("Driver module for ZR36016 video frontends " | |
529 | ZR016_VERSION); | |
530 | MODULE_LICENSE("GPL"); |