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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 | * | |
1da177e4 LT |
20 | * ------------------------------------------------------------------------ |
21 | */ | |
22 | ||
23 | #define ZR016_VERSION "v0.7" | |
24 | ||
1da177e4 LT |
25 | #include <linux/module.h> |
26 | #include <linux/init.h> | |
27 | #include <linux/slab.h> | |
28 | #include <linux/delay.h> | |
29 | ||
30 | #include <linux/types.h> | |
31 | #include <linux/wait.h> | |
32 | ||
1da177e4 | 33 | /* I/O commands, error codes */ |
f518b43c | 34 | #include <asm/io.h> |
1da177e4 LT |
35 | |
36 | /* v4l API */ | |
1da177e4 LT |
37 | |
38 | /* headerfile of this module */ | |
6ac7d115 | 39 | #include "zr36016.h" |
1da177e4 LT |
40 | |
41 | /* codec io API */ | |
6ac7d115 | 42 | #include "videocodec.h" |
1da177e4 LT |
43 | |
44 | /* it doesn't make sense to have more than 20 or so, | |
45 | just to prevent some unwanted loops */ | |
46 | #define MAX_CODECS 20 | |
47 | ||
48 | /* amount of chips attached via this driver */ | |
ff699e6b | 49 | static int zr36016_codecs; |
1da177e4 LT |
50 | |
51 | /* debugging is available via module parameter */ | |
ff699e6b | 52 | static int debug; |
1da177e4 LT |
53 | module_param(debug, int, 0); |
54 | MODULE_PARM_DESC(debug, "Debug level (0-4)"); | |
55 | ||
56 | #define dprintk(num, format, args...) \ | |
57 | do { \ | |
58 | if (debug >= num) \ | |
59 | printk(format, ##args); \ | |
60 | } while (0) | |
61 | ||
62 | /* ========================================================================= | |
63 | Local hardware I/O functions: | |
64 | ||
65 | read/write via codec layer (registers are located in the master device) | |
66 | ========================================================================= */ | |
67 | ||
68 | /* read and write functions */ | |
69 | static u8 | |
70 | zr36016_read (struct zr36016 *ptr, | |
71 | u16 reg) | |
72 | { | |
73 | u8 value = 0; | |
74 | ||
75 | // just in case something is wrong... | |
76 | if (ptr->codec->master_data->readreg) | |
77 | value = | |
78 | (ptr->codec->master_data-> | |
79 | readreg(ptr->codec, reg)) & 0xFF; | |
80 | else | |
81 | dprintk(1, | |
82 | KERN_ERR "%s: invalid I/O setup, nothing read!\n", | |
83 | ptr->name); | |
84 | ||
85 | dprintk(4, "%s: reading from 0x%04x: %02x\n", ptr->name, reg, | |
86 | value); | |
87 | ||
88 | return value; | |
89 | } | |
90 | ||
91 | static void | |
92 | zr36016_write (struct zr36016 *ptr, | |
93 | u16 reg, | |
94 | u8 value) | |
95 | { | |
96 | dprintk(4, "%s: writing 0x%02x to 0x%04x\n", ptr->name, value, | |
97 | reg); | |
98 | ||
99 | // just in case something is wrong... | |
100 | if (ptr->codec->master_data->writereg) { | |
101 | ptr->codec->master_data->writereg(ptr->codec, reg, value); | |
102 | } else | |
103 | dprintk(1, | |
104 | KERN_ERR | |
105 | "%s: invalid I/O setup, nothing written!\n", | |
106 | ptr->name); | |
107 | } | |
108 | ||
109 | /* indirect read and write functions */ | |
110 | /* the 016 supports auto-addr-increment, but | |
111 | * writing it all time cost not much and is safer... */ | |
112 | static u8 | |
113 | zr36016_readi (struct zr36016 *ptr, | |
114 | u16 reg) | |
115 | { | |
116 | u8 value = 0; | |
117 | ||
118 | // just in case something is wrong... | |
119 | if ((ptr->codec->master_data->writereg) && | |
120 | (ptr->codec->master_data->readreg)) { | |
121 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR | |
122 | value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA | |
123 | } else | |
124 | dprintk(1, | |
125 | KERN_ERR | |
126 | "%s: invalid I/O setup, nothing read (i)!\n", | |
127 | ptr->name); | |
128 | ||
129 | dprintk(4, "%s: reading indirect from 0x%04x: %02x\n", ptr->name, | |
130 | reg, value); | |
131 | return value; | |
132 | } | |
133 | ||
134 | static void | |
135 | zr36016_writei (struct zr36016 *ptr, | |
d56410e0 MCC |
136 | u16 reg, |
137 | u8 value) | |
1da177e4 LT |
138 | { |
139 | dprintk(4, "%s: writing indirect 0x%02x to 0x%04x\n", ptr->name, | |
140 | value, reg); | |
141 | ||
142 | // just in case something is wrong... | |
143 | if (ptr->codec->master_data->writereg) { | |
144 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR | |
145 | ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA | |
146 | } else | |
147 | dprintk(1, | |
148 | KERN_ERR | |
149 | "%s: invalid I/O setup, nothing written (i)!\n", | |
150 | ptr->name); | |
151 | } | |
152 | ||
153 | /* ========================================================================= | |
154 | Local helper function: | |
155 | ||
156 | version read | |
157 | ========================================================================= */ | |
158 | ||
159 | /* version kept in datastructure */ | |
160 | static u8 | |
161 | zr36016_read_version (struct zr36016 *ptr) | |
162 | { | |
163 | ptr->version = zr36016_read(ptr, 0) >> 4; | |
164 | return ptr->version; | |
165 | } | |
166 | ||
167 | /* ========================================================================= | |
168 | Local helper function: | |
169 | ||
170 | basic test of "connectivity", writes/reads to/from PAX-Lo register | |
171 | ========================================================================= */ | |
172 | ||
173 | static int | |
174 | zr36016_basic_test (struct zr36016 *ptr) | |
175 | { | |
176 | if (debug) { | |
177 | int i; | |
178 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x55); | |
179 | dprintk(1, KERN_INFO "%s: registers: ", ptr->name); | |
180 | for (i = 0; i <= 0x0b; i++) | |
181 | dprintk(1, "%02x ", zr36016_readi(ptr, i)); | |
182 | dprintk(1, "\n"); | |
183 | } | |
184 | // for testing just write 0, then the default value to a register and read | |
d56410e0 | 185 | // it back in both cases |
1da177e4 LT |
186 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x00); |
187 | if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) { | |
188 | dprintk(1, | |
189 | KERN_ERR | |
190 | "%s: attach failed, can't connect to vfe processor!\n", | |
191 | ptr->name); | |
192 | return -ENXIO; | |
193 | } | |
194 | zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0); | |
195 | if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) { | |
196 | dprintk(1, | |
197 | KERN_ERR | |
198 | "%s: attach failed, can't connect to vfe processor!\n", | |
199 | ptr->name); | |
200 | return -ENXIO; | |
201 | } | |
202 | // we allow version numbers from 0-3, should be enough, though | |
203 | zr36016_read_version(ptr); | |
204 | if (ptr->version & 0x0c) { | |
205 | dprintk(1, | |
206 | KERN_ERR | |
207 | "%s: attach failed, suspicious version %d found...\n", | |
208 | ptr->name, ptr->version); | |
209 | return -ENXIO; | |
210 | } | |
211 | ||
212 | return 0; /* looks good! */ | |
213 | } | |
214 | ||
215 | /* ========================================================================= | |
216 | Local helper function: | |
217 | ||
218 | simple loop for pushing the init datasets - NO USE -- | |
219 | ========================================================================= */ | |
220 | ||
221 | #if 0 | |
222 | static int zr36016_pushit (struct zr36016 *ptr, | |
223 | u16 startreg, | |
224 | u16 len, | |
d56410e0 | 225 | const char *data) |
1da177e4 | 226 | { |
d56410e0 | 227 | int i=0; |
1da177e4 | 228 | |
d56410e0 | 229 | dprintk(4, "%s: write data block to 0x%04x (len=%d)\n", |
1da177e4 | 230 | ptr->name, startreg,len); |
d56410e0 MCC |
231 | while (i<len) { |
232 | zr36016_writei(ptr, startreg++, data[i++]); | |
233 | } | |
1da177e4 | 234 | |
d56410e0 | 235 | return i; |
1da177e4 LT |
236 | } |
237 | #endif | |
238 | ||
239 | /* ========================================================================= | |
240 | Basic datasets & init: | |
241 | ||
242 | //TODO// | |
243 | ========================================================================= */ | |
244 | ||
1da177e4 LT |
245 | static void |
246 | zr36016_init (struct zr36016 *ptr) | |
247 | { | |
248 | // stop any processing | |
249 | zr36016_write(ptr, ZR016_GOSTOP, 0); | |
250 | ||
251 | // mode setup (yuv422 in and out, compression/expansuon due to mode) | |
252 | zr36016_write(ptr, ZR016_MODE, | |
253 | ZR016_YUV422 | ZR016_YUV422_YUV422 | | |
254 | (ptr->mode == CODEC_DO_COMPRESSION ? | |
255 | ZR016_COMPRESSION : ZR016_EXPANSION)); | |
256 | ||
257 | // misc setup | |
258 | zr36016_writei(ptr, ZR016I_SETUP1, | |
259 | (ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0) | | |
260 | (ptr->ydec ? ZR016_VERT : 0) | ZR016_CNTI); | |
261 | zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR); | |
262 | ||
263 | // Window setup | |
264 | // (no extra offset for now, norm defines offset, default width height) | |
265 | zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8); | |
266 | zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0xFF); | |
267 | zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8); | |
268 | zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF); | |
269 | zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8); | |
270 | zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF); | |
271 | zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8); | |
272 | zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF); | |
273 | ||
274 | /* shall we continue now, please? */ | |
275 | zr36016_write(ptr, ZR016_GOSTOP, 1); | |
276 | } | |
277 | ||
278 | /* ========================================================================= | |
279 | CODEC API FUNCTIONS | |
280 | ||
281 | this functions are accessed by the master via the API structure | |
282 | ========================================================================= */ | |
283 | ||
284 | /* set compression/expansion mode and launches codec - | |
285 | this should be the last call from the master before starting processing */ | |
286 | static int | |
287 | zr36016_set_mode (struct videocodec *codec, | |
288 | int mode) | |
289 | { | |
290 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
291 | ||
292 | dprintk(2, "%s: set_mode %d call\n", ptr->name, mode); | |
293 | ||
294 | if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION)) | |
295 | return -EINVAL; | |
296 | ||
297 | ptr->mode = mode; | |
298 | zr36016_init(ptr); | |
299 | ||
300 | return 0; | |
301 | } | |
302 | ||
303 | /* set picture size */ | |
304 | static int | |
305 | zr36016_set_video (struct videocodec *codec, | |
306 | struct tvnorm *norm, | |
307 | struct vfe_settings *cap, | |
308 | struct vfe_polarity *pol) | |
309 | { | |
310 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
311 | ||
312 | dprintk(2, "%s: set_video %d.%d, %d/%d-%dx%d (0x%x) call\n", | |
313 | ptr->name, norm->HStart, norm->VStart, | |
314 | cap->x, cap->y, cap->width, cap->height, | |
315 | cap->decimation); | |
316 | ||
317 | /* if () return -EINVAL; | |
318 | * trust the master driver that it knows what it does - so | |
319 | * we allow invalid startx/y for now ... */ | |
320 | ptr->width = cap->width; | |
321 | ptr->height = cap->height; | |
322 | /* (Ronald) This is ugly. zoran_device.c, line 387 | |
323 | * already mentions what happens if HStart is even | |
324 | * (blue faces, etc., cr/cb inversed). There's probably | |
325 | * some good reason why HStart is 0 instead of 1, so I'm | |
326 | * leaving it to this for now, but really... This can be | |
327 | * done a lot simpler */ | |
328 | ptr->xoff = (norm->HStart ? norm->HStart : 1) + cap->x; | |
329 | /* Something to note here (I don't understand it), setting | |
330 | * VStart too high will cause the codec to 'not work'. I | |
331 | * really don't get it. values of 16 (VStart) already break | |
332 | * it here. Just '0' seems to work. More testing needed! */ | |
333 | ptr->yoff = norm->VStart + cap->y; | |
334 | /* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */ | |
335 | ptr->xdec = ((cap->decimation & 0xff) == 1) ? 0 : 1; | |
336 | ptr->ydec = (((cap->decimation >> 8) & 0xff) == 1) ? 0 : 1; | |
337 | ||
338 | return 0; | |
339 | } | |
340 | ||
341 | /* additional control functions */ | |
342 | static int | |
343 | zr36016_control (struct videocodec *codec, | |
344 | int type, | |
345 | int size, | |
346 | void *data) | |
347 | { | |
348 | struct zr36016 *ptr = (struct zr36016 *) codec->data; | |
349 | int *ival = (int *) data; | |
350 | ||
351 | dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type, | |
352 | size); | |
353 | ||
354 | switch (type) { | |
355 | case CODEC_G_STATUS: /* get last status - we don't know it ... */ | |
356 | if (size != sizeof(int)) | |
357 | return -EFAULT; | |
358 | *ival = 0; | |
359 | break; | |
360 | ||
361 | case CODEC_G_CODEC_MODE: | |
362 | if (size != sizeof(int)) | |
363 | return -EFAULT; | |
364 | *ival = 0; | |
365 | break; | |
366 | ||
367 | case CODEC_S_CODEC_MODE: | |
368 | if (size != sizeof(int)) | |
369 | return -EFAULT; | |
370 | if (*ival != 0) | |
371 | return -EINVAL; | |
372 | /* not needed, do nothing */ | |
373 | return 0; | |
374 | ||
375 | case CODEC_G_VFE: | |
376 | case CODEC_S_VFE: | |
377 | return 0; | |
378 | ||
379 | case CODEC_S_MMAP: | |
380 | /* not available, give an error */ | |
381 | return -ENXIO; | |
382 | ||
383 | default: | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
387 | return size; | |
388 | } | |
389 | ||
390 | /* ========================================================================= | |
391 | Exit and unregister function: | |
392 | ||
393 | Deinitializes Zoran's JPEG processor | |
394 | ========================================================================= */ | |
395 | ||
396 | static int | |
397 | zr36016_unset (struct videocodec *codec) | |
398 | { | |
399 | struct zr36016 *ptr = codec->data; | |
400 | ||
401 | if (ptr) { | |
402 | /* do wee need some codec deinit here, too ???? */ | |
403 | ||
404 | dprintk(1, "%s: finished codec #%d\n", ptr->name, | |
405 | ptr->num); | |
406 | kfree(ptr); | |
407 | codec->data = NULL; | |
408 | ||
409 | zr36016_codecs--; | |
410 | return 0; | |
411 | } | |
412 | ||
413 | return -EFAULT; | |
414 | } | |
415 | ||
416 | /* ========================================================================= | |
417 | Setup and registry function: | |
418 | ||
419 | Initializes Zoran's JPEG processor | |
420 | ||
421 | Also sets pixel size, average code size, mode (compr./decompr.) | |
422 | (the given size is determined by the processor with the video interface) | |
423 | ========================================================================= */ | |
424 | ||
425 | static int | |
426 | zr36016_setup (struct videocodec *codec) | |
427 | { | |
428 | struct zr36016 *ptr; | |
429 | int res; | |
430 | ||
431 | dprintk(2, "zr36016: initializing VFE subsystem #%d.\n", | |
432 | zr36016_codecs); | |
433 | ||
434 | if (zr36016_codecs == MAX_CODECS) { | |
435 | dprintk(1, | |
436 | KERN_ERR "zr36016: Can't attach more codecs!\n"); | |
437 | return -ENOSPC; | |
438 | } | |
439 | //mem structure init | |
7408187d | 440 | codec->data = ptr = kzalloc(sizeof(struct zr36016), GFP_KERNEL); |
1da177e4 LT |
441 | if (NULL == ptr) { |
442 | dprintk(1, KERN_ERR "zr36016: Can't get enough memory!\n"); | |
443 | return -ENOMEM; | |
444 | } | |
1da177e4 LT |
445 | |
446 | snprintf(ptr->name, sizeof(ptr->name), "zr36016[%d]", | |
447 | zr36016_codecs); | |
448 | ptr->num = zr36016_codecs++; | |
449 | ptr->codec = codec; | |
450 | ||
451 | //testing | |
452 | res = zr36016_basic_test(ptr); | |
453 | if (res < 0) { | |
454 | zr36016_unset(codec); | |
455 | return res; | |
456 | } | |
457 | //final setup | |
458 | ptr->mode = CODEC_DO_COMPRESSION; | |
459 | ptr->width = 768; | |
460 | ptr->height = 288; | |
461 | ptr->xdec = 1; | |
462 | ptr->ydec = 0; | |
463 | zr36016_init(ptr); | |
464 | ||
465 | dprintk(1, KERN_INFO "%s: codec v%d attached and running\n", | |
466 | ptr->name, ptr->version); | |
467 | ||
468 | return 0; | |
469 | } | |
470 | ||
471 | static const struct videocodec zr36016_codec = { | |
472 | .owner = THIS_MODULE, | |
473 | .name = "zr36016", | |
474 | .magic = 0L, // magic not used | |
475 | .flags = | |
476 | CODEC_FLAG_HARDWARE | CODEC_FLAG_VFE | CODEC_FLAG_ENCODER | | |
477 | CODEC_FLAG_DECODER, | |
478 | .type = CODEC_TYPE_ZR36016, | |
479 | .setup = zr36016_setup, // functionality | |
480 | .unset = zr36016_unset, | |
481 | .set_mode = zr36016_set_mode, | |
482 | .set_video = zr36016_set_video, | |
483 | .control = zr36016_control, | |
484 | // others are not used | |
485 | }; | |
486 | ||
487 | /* ========================================================================= | |
488 | HOOK IN DRIVER AS KERNEL MODULE | |
489 | ========================================================================= */ | |
490 | ||
491 | static int __init | |
492 | zr36016_init_module (void) | |
493 | { | |
494 | //dprintk(1, "ZR36016 driver %s\n",ZR016_VERSION); | |
495 | zr36016_codecs = 0; | |
496 | return videocodec_register(&zr36016_codec); | |
497 | } | |
498 | ||
499 | static void __exit | |
500 | zr36016_cleanup_module (void) | |
501 | { | |
502 | if (zr36016_codecs) { | |
503 | dprintk(1, | |
504 | "zr36016: something's wrong - %d codecs left somehow.\n", | |
505 | zr36016_codecs); | |
506 | } | |
507 | videocodec_unregister(&zr36016_codec); | |
508 | } | |
509 | ||
510 | module_init(zr36016_init_module); | |
511 | module_exit(zr36016_cleanup_module); | |
512 | ||
513 | MODULE_AUTHOR("Wolfgang Scherr <scherr@net4you.at>"); | |
514 | MODULE_DESCRIPTION("Driver module for ZR36016 video frontends " | |
515 | ZR016_VERSION); | |
516 | MODULE_LICENSE("GPL"); |