2 * Zoran ZR36016 basic configuration functions
4 * Copyright (C) 2001 Wolfgang Scherr <scherr@net4you.at>
6 * $Id: zr36016.c,v 1.1.2.14 2003/08/20 19:46:55 rbultje Exp $
8 * ------------------------------------------------------------------------
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.
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.
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.
24 * ------------------------------------------------------------------------
27 #define ZR016_VERSION "v0.7"
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/slab.h>
32 #include <linux/delay.h>
34 #include <linux/types.h>
35 #include <linux/wait.h>
37 /* includes for structures and defines regarding video
38 #include<linux/videodev.h> */
40 /* I/O commands, error codes */
45 #include <linux/videodev.h>
47 /* headerfile of this module */
51 #include"videocodec.h"
53 /* it doesn't make sense to have more than 20 or so,
54 just to prevent some unwanted loops */
57 /* amount of chips attached via this driver */
58 static int zr36016_codecs;
60 /* debugging is available via module parameter */
62 module_param(debug, int, 0);
63 MODULE_PARM_DESC(debug, "Debug level (0-4)");
65 #define dprintk(num, format, args...) \
68 printk(format, ##args); \
71 /* =========================================================================
72 Local hardware I/O functions:
74 read/write via codec layer (registers are located in the master device)
75 ========================================================================= */
77 /* read and write functions */
79 zr36016_read (struct zr36016 *ptr,
84 // just in case something is wrong...
85 if (ptr->codec->master_data->readreg)
87 (ptr->codec->master_data->
88 readreg(ptr->codec, reg)) & 0xFF;
91 KERN_ERR "%s: invalid I/O setup, nothing read!\n",
94 dprintk(4, "%s: reading from 0x%04x: %02x\n", ptr->name, reg,
101 zr36016_write (struct zr36016 *ptr,
105 dprintk(4, "%s: writing 0x%02x to 0x%04x\n", ptr->name, value,
108 // just in case something is wrong...
109 if (ptr->codec->master_data->writereg) {
110 ptr->codec->master_data->writereg(ptr->codec, reg, value);
114 "%s: invalid I/O setup, nothing written!\n",
118 /* indirect read and write functions */
119 /* the 016 supports auto-addr-increment, but
120 * writing it all time cost not much and is safer... */
122 zr36016_readi (struct zr36016 *ptr,
127 // just in case something is wrong...
128 if ((ptr->codec->master_data->writereg) &&
129 (ptr->codec->master_data->readreg)) {
130 ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
131 value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA
135 "%s: invalid I/O setup, nothing read (i)!\n",
138 dprintk(4, "%s: reading indirect from 0x%04x: %02x\n", ptr->name,
144 zr36016_writei (struct zr36016 *ptr,
148 dprintk(4, "%s: writing indirect 0x%02x to 0x%04x\n", ptr->name,
151 // just in case something is wrong...
152 if (ptr->codec->master_data->writereg) {
153 ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
154 ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA
158 "%s: invalid I/O setup, nothing written (i)!\n",
162 /* =========================================================================
163 Local helper function:
166 ========================================================================= */
168 /* version kept in datastructure */
170 zr36016_read_version (struct zr36016 *ptr)
172 ptr->version = zr36016_read(ptr, 0) >> 4;
176 /* =========================================================================
177 Local helper function:
179 basic test of "connectivity", writes/reads to/from PAX-Lo register
180 ========================================================================= */
183 zr36016_basic_test (struct zr36016 *ptr)
187 zr36016_writei(ptr, ZR016I_PAX_LO, 0x55);
188 dprintk(1, KERN_INFO "%s: registers: ", ptr->name);
189 for (i = 0; i <= 0x0b; i++)
190 dprintk(1, "%02x ", zr36016_readi(ptr, i));
193 // for testing just write 0, then the default value to a register and read
194 // it back in both cases
195 zr36016_writei(ptr, ZR016I_PAX_LO, 0x00);
196 if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) {
199 "%s: attach failed, can't connect to vfe processor!\n",
203 zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0);
204 if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) {
207 "%s: attach failed, can't connect to vfe processor!\n",
211 // we allow version numbers from 0-3, should be enough, though
212 zr36016_read_version(ptr);
213 if (ptr->version & 0x0c) {
216 "%s: attach failed, suspicious version %d found...\n",
217 ptr->name, ptr->version);
221 return 0; /* looks good! */
224 /* =========================================================================
225 Local helper function:
227 simple loop for pushing the init datasets - NO USE --
228 ========================================================================= */
231 static int zr36016_pushit (struct zr36016 *ptr,
238 dprintk(4, "%s: write data block to 0x%04x (len=%d)\n",
239 ptr->name, startreg,len);
241 zr36016_writei(ptr, startreg++, data[i++]);
248 /* =========================================================================
249 Basic datasets & init:
252 ========================================================================= */
254 // needed offset values PAL NTSC SECAM
255 static const int zr016_xoff[] = { 20, 20, 20 };
256 static const int zr016_yoff[] = { 8, 9, 7 };
259 zr36016_init (struct zr36016 *ptr)
261 // stop any processing
262 zr36016_write(ptr, ZR016_GOSTOP, 0);
264 // mode setup (yuv422 in and out, compression/expansuon due to mode)
265 zr36016_write(ptr, ZR016_MODE,
266 ZR016_YUV422 | ZR016_YUV422_YUV422 |
267 (ptr->mode == CODEC_DO_COMPRESSION ?
268 ZR016_COMPRESSION : ZR016_EXPANSION));
271 zr36016_writei(ptr, ZR016I_SETUP1,
272 (ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0) |
273 (ptr->ydec ? ZR016_VERT : 0) | ZR016_CNTI);
274 zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR);
277 // (no extra offset for now, norm defines offset, default width height)
278 zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8);
279 zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0xFF);
280 zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8);
281 zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF);
282 zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8);
283 zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF);
284 zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8);
285 zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF);
287 /* shall we continue now, please? */
288 zr36016_write(ptr, ZR016_GOSTOP, 1);
291 /* =========================================================================
294 this functions are accessed by the master via the API structure
295 ========================================================================= */
297 /* set compression/expansion mode and launches codec -
298 this should be the last call from the master before starting processing */
300 zr36016_set_mode (struct videocodec *codec,
303 struct zr36016 *ptr = (struct zr36016 *) codec->data;
305 dprintk(2, "%s: set_mode %d call\n", ptr->name, mode);
307 if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION))
316 /* set picture size */
318 zr36016_set_video (struct videocodec *codec,
320 struct vfe_settings *cap,
321 struct vfe_polarity *pol)
323 struct zr36016 *ptr = (struct zr36016 *) codec->data;
325 dprintk(2, "%s: set_video %d.%d, %d/%d-%dx%d (0x%x) call\n",
326 ptr->name, norm->HStart, norm->VStart,
327 cap->x, cap->y, cap->width, cap->height,
330 /* if () return -EINVAL;
331 * trust the master driver that it knows what it does - so
332 * we allow invalid startx/y for now ... */
333 ptr->width = cap->width;
334 ptr->height = cap->height;
335 /* (Ronald) This is ugly. zoran_device.c, line 387
336 * already mentions what happens if HStart is even
337 * (blue faces, etc., cr/cb inversed). There's probably
338 * some good reason why HStart is 0 instead of 1, so I'm
339 * leaving it to this for now, but really... This can be
340 * done a lot simpler */
341 ptr->xoff = (norm->HStart ? norm->HStart : 1) + cap->x;
342 /* Something to note here (I don't understand it), setting
343 * VStart too high will cause the codec to 'not work'. I
344 * really don't get it. values of 16 (VStart) already break
345 * it here. Just '0' seems to work. More testing needed! */
346 ptr->yoff = norm->VStart + cap->y;
347 /* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */
348 ptr->xdec = ((cap->decimation & 0xff) == 1) ? 0 : 1;
349 ptr->ydec = (((cap->decimation >> 8) & 0xff) == 1) ? 0 : 1;
354 /* additional control functions */
356 zr36016_control (struct videocodec *codec,
361 struct zr36016 *ptr = (struct zr36016 *) codec->data;
362 int *ival = (int *) data;
364 dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type,
368 case CODEC_G_STATUS: /* get last status - we don't know it ... */
369 if (size != sizeof(int))
374 case CODEC_G_CODEC_MODE:
375 if (size != sizeof(int))
380 case CODEC_S_CODEC_MODE:
381 if (size != sizeof(int))
385 /* not needed, do nothing */
393 /* not available, give an error */
403 /* =========================================================================
404 Exit and unregister function:
406 Deinitializes Zoran's JPEG processor
407 ========================================================================= */
410 zr36016_unset (struct videocodec *codec)
412 struct zr36016 *ptr = codec->data;
415 /* do wee need some codec deinit here, too ???? */
417 dprintk(1, "%s: finished codec #%d\n", ptr->name,
429 /* =========================================================================
430 Setup and registry function:
432 Initializes Zoran's JPEG processor
434 Also sets pixel size, average code size, mode (compr./decompr.)
435 (the given size is determined by the processor with the video interface)
436 ========================================================================= */
439 zr36016_setup (struct videocodec *codec)
444 dprintk(2, "zr36016: initializing VFE subsystem #%d.\n",
447 if (zr36016_codecs == MAX_CODECS) {
449 KERN_ERR "zr36016: Can't attach more codecs!\n");
453 codec->data = ptr = kzalloc(sizeof(struct zr36016), GFP_KERNEL);
455 dprintk(1, KERN_ERR "zr36016: Can't get enough memory!\n");
459 snprintf(ptr->name, sizeof(ptr->name), "zr36016[%d]",
461 ptr->num = zr36016_codecs++;
465 res = zr36016_basic_test(ptr);
467 zr36016_unset(codec);
471 ptr->mode = CODEC_DO_COMPRESSION;
478 dprintk(1, KERN_INFO "%s: codec v%d attached and running\n",
479 ptr->name, ptr->version);
484 static const struct videocodec zr36016_codec = {
485 .owner = THIS_MODULE,
487 .magic = 0L, // magic not used
489 CODEC_FLAG_HARDWARE | CODEC_FLAG_VFE | CODEC_FLAG_ENCODER |
491 .type = CODEC_TYPE_ZR36016,
492 .setup = zr36016_setup, // functionality
493 .unset = zr36016_unset,
494 .set_mode = zr36016_set_mode,
495 .set_video = zr36016_set_video,
496 .control = zr36016_control,
497 // others are not used
500 /* =========================================================================
501 HOOK IN DRIVER AS KERNEL MODULE
502 ========================================================================= */
505 zr36016_init_module (void)
507 //dprintk(1, "ZR36016 driver %s\n",ZR016_VERSION);
509 return videocodec_register(&zr36016_codec);
513 zr36016_cleanup_module (void)
515 if (zr36016_codecs) {
517 "zr36016: something's wrong - %d codecs left somehow.\n",
520 videocodec_unregister(&zr36016_codec);
523 module_init(zr36016_init_module);
524 module_exit(zr36016_cleanup_module);
526 MODULE_AUTHOR("Wolfgang Scherr <scherr@net4you.at>");
527 MODULE_DESCRIPTION("Driver module for ZR36016 video frontends "
529 MODULE_LICENSE("GPL");