drivers/media/video/zr36060.c

   1 /*
   2  * Zoran ZR36060 basic configuration functions
   3  *
   4  * Copyright (C) 2002 Laurent Pinchart <laurent.pinchart@skynet.be>
   5  *
   6  * $Id: zr36060.c,v 1.1.2.22 2003/05/06 09:35:36 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 ZR060_VERSION "v0.7"
  28
  29 #include <linux/version.h>
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/slab.h>
  33 #include <linux/delay.h>
  34
  35 #include <linux/types.h>
  36 #include <linux/wait.h>
  37
  38 /* includes for structures and defines regarding video
  39    #include<linux/videodev.h> */
  40
  41 /* I/O commands, error codes */
  42 #include<asm/io.h>
  43 //#include<errno.h>
  44
  45 /* headerfile of this module */
  46 #include"zr36060.h"
  47
  48 /* codec io API */
  49 #include"videocodec.h"
  50
  51 /* it doesn't make sense to have more than 20 or so,
  52   just to prevent some unwanted loops */
  53 #define MAX_CODECS 20
  54
  55 /* amount of chips attached via this driver */
  56 static int zr36060_codecs = 0;
  57
  58 static int low_bitrate = 0;
  59 MODULE_PARM(low_bitrate, "i");
  60 MODULE_PARM_DESC(low_bitrate, "Buz compatibility option, halves bitrate");
  61
  62 /* debugging is available via module parameter */
  63 static int debug = 0;
  64 MODULE_PARM(debug, "i");
  65 MODULE_PARM_DESC(debug, "Debug level (0-4)");
  66
  67 #define dprintk(num, format, args...) \
  68         do { \
  69                 if (debug >= num) \
  70                         printk(format, ##args); \
  71         } while (0)
  72
  73 /* =========================================================================
  74    Local hardware I/O functions:
  75
  76    read/write via codec layer (registers are located in the master device)
  77    ========================================================================= */
  78
  79 /* read and write functions */
  80 static u8
  81 zr36060_read (struct zr36060 *ptr,
  82               u16             reg)
  83 {
  84         u8 value = 0;
  85
  86         // just in case something is wrong...
  87         if (ptr->codec->master_data->readreg)
  88                 value = (ptr->codec->master_data->readreg(ptr->codec,
  89                                                           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,value);
  96
  97         return value;
  98 }
  99
 100 static void
 101 zr36060_write(struct zr36060 *ptr,
 102               u16             reg,
 103               u8              value)
 104 {
 105         //dprintk(4, "%s: writing 0x%02x to 0x%04x\n",ptr->name,value,reg);
 106         dprintk(4, "0x%02x @0x%04x\n", value, reg);
 107
 108         // just in case something is wrong...
 109         if (ptr->codec->master_data->writereg)
 110                 ptr->codec->master_data->writereg(ptr->codec, reg, value);
 111         else
 112                 dprintk(1,
 113                         KERN_ERR
 114                         "%s: invalid I/O setup, nothing written!\n",
 115                         ptr->name);
 116 }
 117
 118 /* =========================================================================
 119    Local helper function:
 120
 121    status read
 122    ========================================================================= */
 123
 124 /* status is kept in datastructure */
 125 static u8
 126 zr36060_read_status (struct zr36060 *ptr)
 127 {
 128         ptr->status = zr36060_read(ptr, ZR060_CFSR);
 129
 130         zr36060_read(ptr, 0);
 131         return ptr->status;
 132 }
 133
 134 /* =========================================================================
 135    Local helper function:
 136
 137    scale factor read
 138    ========================================================================= */
 139
 140 /* scale factor is kept in datastructure */
 141 static u16
 142 zr36060_read_scalefactor (struct zr36060 *ptr)
 143 {
 144         ptr->scalefact = (zr36060_read(ptr, ZR060_SF_HI) << 8) |
 145                          (zr36060_read(ptr, ZR060_SF_LO) & 0xFF);
 146
 147         /* leave 0 selected for an eventually GO from master */
 148         zr36060_read(ptr, 0);
 149         return ptr->scalefact;
 150 }
 151
 152 /* =========================================================================
 153    Local helper function:
 154
 155    wait if codec is ready to proceed (end of processing) or time is over
 156    ========================================================================= */
 157
 158 static void
 159 zr36060_wait_end (struct zr36060 *ptr)
 160 {
 161         int i = 0;
 162
 163         while (zr36060_read_status(ptr) & ZR060_CFSR_Busy) {
 164                 udelay(1);
 165                 if (i++ > 200000) {     // 200ms, there is for shure something wrong!!!
 166                         dprintk(1,
 167                                 "%s: timout at wait_end (last status: 0x%02x)\n",
 168                                 ptr->name, ptr->status);
 169                         break;
 170                 }
 171         }
 172 }
 173
 174 /* =========================================================================
 175    Local helper function:
 176
 177    basic test of "connectivity", writes/reads to/from memory the SOF marker
 178    ========================================================================= */
 179
 180 static int
 181 zr36060_basic_test (struct zr36060 *ptr)
 182 {
 183         if ((zr36060_read(ptr, ZR060_IDR_DEV) != 0x33) &&
 184             (zr36060_read(ptr, ZR060_IDR_REV) != 0x01)) {
 185                 dprintk(1,
 186                         KERN_ERR
 187                         "%s: attach failed, can't connect to jpeg processor!\n",
 188                         ptr->name);
 189                 return -ENXIO;
 190         }
 191
 192         zr36060_wait_end(ptr);
 193         if (ptr->status & ZR060_CFSR_Busy) {
 194                 dprintk(1,
 195                         KERN_ERR
 196                         "%s: attach failed, jpeg processor failed (end flag)!\n",
 197                         ptr->name);
 198                 return -EBUSY;
 199         }
 200
 201         return 0;               /* looks good! */
 202 }
 203
 204 /* =========================================================================
 205    Local helper function:
 206
 207    simple loop for pushing the init datasets
 208    ========================================================================= */
 209
 210 static int
 211 zr36060_pushit (struct zr36060 *ptr,
 212                 u16             startreg,
 213                 u16             len,
 214                 const char     *data)
 215 {
 216         int i = 0;
 217
 218         dprintk(4, "%s: write data block to 0x%04x (len=%d)\n", ptr->name,
 219                 startreg, len);
 220         while (i < len) {
 221                 zr36060_write(ptr, startreg++, data[i++]);
 222         }
 223
 224         return i;
 225 }
 226
 227 /* =========================================================================
 228    Basic datasets:
 229
 230    jpeg baseline setup data (you find it on lots places in internet, or just
 231    extract it from any regular .jpg image...)
 232
 233    Could be variable, but until it's not needed it they are just fixed to save
 234    memory. Otherwise expand zr36060 structure with arrays, push the values to
 235    it and initalize from there, as e.g. the linux zr36057/60 driver does it.
 236    ========================================================================= */
 237
 238 static const char zr36060_dqt[0x86] = {
 239         0xff, 0xdb,             //Marker: DQT
 240         0x00, 0x84,             //Length: 2*65+2
 241         0x00,                   //Pq,Tq first table
 242         0x10, 0x0b, 0x0c, 0x0e, 0x0c, 0x0a, 0x10, 0x0e,
 243         0x0d, 0x0e, 0x12, 0x11, 0x10, 0x13, 0x18, 0x28,
 244         0x1a, 0x18, 0x16, 0x16, 0x18, 0x31, 0x23, 0x25,
 245         0x1d, 0x28, 0x3a, 0x33, 0x3d, 0x3c, 0x39, 0x33,
 246         0x38, 0x37, 0x40, 0x48, 0x5c, 0x4e, 0x40, 0x44,
 247         0x57, 0x45, 0x37, 0x38, 0x50, 0x6d, 0x51, 0x57,
 248         0x5f, 0x62, 0x67, 0x68, 0x67, 0x3e, 0x4d, 0x71,
 249         0x79, 0x70, 0x64, 0x78, 0x5c, 0x65, 0x67, 0x63,
 250         0x01,                   //Pq,Tq second table
 251         0x11, 0x12, 0x12, 0x18, 0x15, 0x18, 0x2f, 0x1a,
 252         0x1a, 0x2f, 0x63, 0x42, 0x38, 0x42, 0x63, 0x63,
 253         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
 254         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
 255         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
 256         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
 257         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63,
 258         0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63, 0x63
 259 };
 260
 261 static const char zr36060_dht[0x1a4] = {
 262         0xff, 0xc4,             //Marker: DHT
 263         0x01, 0xa2,             //Length: 2*AC, 2*DC
 264         0x00,                   //DC first table
 265         0x00, 0x01, 0x05, 0x01, 0x01, 0x01, 0x01, 0x01,
 266         0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
 267         0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
 268         0x01,                   //DC second table
 269         0x00, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
 270         0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
 271         0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B,
 272         0x10,                   //AC first table
 273         0x00, 0x02, 0x01, 0x03, 0x03, 0x02, 0x04, 0x03,
 274         0x05, 0x05, 0x04, 0x04, 0x00, 0x00,
 275         0x01, 0x7D, 0x01, 0x02, 0x03, 0x00, 0x04, 0x11,
 276         0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61,
 277         0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xA1,
 278         0x08, 0x23, 0x42, 0xB1, 0xC1, 0x15, 0x52, 0xD1, 0xF0, 0x24,
 279         0x33, 0x62, 0x72, 0x82, 0x09, 0x0A, 0x16, 0x17,
 280         0x18, 0x19, 0x1A, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x34,
 281         0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
 282         0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56,
 283         0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66,
 284         0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
 285         0x79, 0x7A, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88,
 286         0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
 287         0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7, 0xA8,
 288         0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8, 0xB9,
 289         0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8,
 290         0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8, 0xD9,
 291         0xDA, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
 292         0xE8, 0xE9, 0xEA, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
 293         0xF8, 0xF9, 0xFA,
 294         0x11,                   //AC second table
 295         0x00, 0x02, 0x01, 0x02, 0x04, 0x04, 0x03, 0x04,
 296         0x07, 0x05, 0x04, 0x04, 0x00, 0x01,
 297         0x02, 0x77, 0x00, 0x01, 0x02, 0x03, 0x11, 0x04,
 298         0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71,
 299         0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
 300         0xA1, 0xB1, 0xC1, 0x09, 0x23, 0x33, 0x52, 0xF0, 0x15, 0x62,
 301         0x72, 0xD1, 0x0A, 0x16, 0x24, 0x34, 0xE1, 0x25,
 302         0xF1, 0x17, 0x18, 0x19, 0x1A, 0x26, 0x27, 0x28, 0x29, 0x2A,
 303         0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x43, 0x44,
 304         0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x53, 0x54, 0x55, 0x56,
 305         0x57, 0x58, 0x59, 0x5A, 0x63, 0x64, 0x65, 0x66,
 306         0x67, 0x68, 0x69, 0x6A, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
 307         0x79, 0x7A, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
 308         0x88, 0x89, 0x8A, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98,
 309         0x99, 0x9A, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
 310         0xA8, 0xA9, 0xAA, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7, 0xB8,
 311         0xB9, 0xBA, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
 312         0xC8, 0xC9, 0xCA, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7, 0xD8,
 313         0xD9, 0xDA, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
 314         0xE8, 0xE9, 0xEA, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7, 0xF8,
 315         0xF9, 0xFA
 316 };
 317
 318 static const char zr36060_app[0x40] = {
 319         0xff, 0xe0,             //Marker: APP0
 320         0x00, 0x07,             //Length: 7
 321         ' ', 'A', 'V', 'I', '1', 0, 0, 0,       // 'AVI' field
 322         0, 0, 0, 0, 0, 0, 0, 0,
 323         0, 0, 0, 0, 0, 0, 0, 0,
 324         0, 0, 0, 0, 0, 0, 0, 0,
 325         0, 0, 0, 0, 0, 0, 0, 0,
 326         0, 0, 0, 0, 0, 0, 0, 0,
 327         0, 0, 0, 0, 0, 0, 0, 0,
 328         0, 0, 0, 0
 329 };
 330
 331 static const char zr36060_com[0x40] = {
 332         0xff, 0xfe,             //Marker: COM
 333         0x00, 0x06,             //Length: 6
 334         ' ', 'C', 'O', 'M', 0, 0, 0, 0, // 'COM' field
 335         0, 0, 0, 0, 0, 0, 0, 0,
 336         0, 0, 0, 0, 0, 0, 0, 0,
 337         0, 0, 0, 0, 0, 0, 0, 0,
 338         0, 0, 0, 0, 0, 0, 0, 0,
 339         0, 0, 0, 0, 0, 0, 0, 0,
 340         0, 0, 0, 0, 0, 0, 0, 0,
 341         0, 0, 0, 0
 342 };
 343
 344 /* jpeg baseline setup, this is just fixed in this driver (YUV pictures) */
 345 #define NO_OF_COMPONENTS          0x3   //Y,U,V
 346 #define BASELINE_PRECISION        0x8   //MCU size (?)
 347 static const char zr36060_tq[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };   //table idx's QT
 348 static const char zr36060_td[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };   //table idx's DC
 349 static const char zr36060_ta[8] = { 0, 1, 1, 0, 0, 0, 0, 0 };   //table idx's AC
 350
 351 /* horizontal 422 decimation setup (maybe we support 411 or so later, too) */
 352 static const char zr36060_decimation_h[8] = { 2, 1, 1, 0, 0, 0, 0, 0 };
 353 static const char zr36060_decimation_v[8] = { 1, 1, 1, 0, 0, 0, 0, 0 };
 354
 355 /* =========================================================================
 356    Local helper functions:
 357
 358    calculation and setup of parameter-dependent JPEG baseline segments
 359    (needed for compression only)
 360    ========================================================================= */
 361
 362 /* ------------------------------------------------------------------------- */
 363
 364 /* SOF (start of frame) segment depends on width, height and sampling ratio
 365                          of each color component */
 366
 367 static int
 368 zr36060_set_sof (struct zr36060 *ptr)
 369 {
 370         char sof_data[34];      // max. size of register set
 371         int i;
 372
 373         dprintk(3, "%s: write SOF (%dx%d, %d components)\n", ptr->name,
 374                 ptr->width, ptr->height, NO_OF_COMPONENTS);
 375         sof_data[0] = 0xff;
 376         sof_data[1] = 0xc0;
 377         sof_data[2] = 0x00;
 378         sof_data[3] = (3 * NO_OF_COMPONENTS) + 8;
 379         sof_data[4] = BASELINE_PRECISION;       // only '8' possible with zr36060
 380         sof_data[5] = (ptr->height) >> 8;
 381         sof_data[6] = (ptr->height) & 0xff;
 382         sof_data[7] = (ptr->width) >> 8;
 383         sof_data[8] = (ptr->width) & 0xff;
 384         sof_data[9] = NO_OF_COMPONENTS;
 385         for (i = 0; i < NO_OF_COMPONENTS; i++) {
 386                 sof_data[10 + (i * 3)] = i;     // index identifier
 387                 sof_data[11 + (i * 3)] = (ptr->h_samp_ratio[i] << 4) |
 388                                          (ptr->v_samp_ratio[i]); // sampling ratios
 389                 sof_data[12 + (i * 3)] = zr36060_tq[i]; // Q table selection
 390         }
 391         return zr36060_pushit(ptr, ZR060_SOF_IDX,
 392                               (3 * NO_OF_COMPONENTS) + 10, sof_data);
 393 }
 394
 395 /* ------------------------------------------------------------------------- */
 396
 397 /* SOS (start of scan) segment depends on the used scan components
 398                         of each color component */
 399
 400 static int
 401 zr36060_set_sos (struct zr36060 *ptr)
 402 {
 403         char sos_data[16];      // max. size of register set
 404         int i;
 405
 406         dprintk(3, "%s: write SOS\n", ptr->name);
 407         sos_data[0] = 0xff;
 408         sos_data[1] = 0xda;
 409         sos_data[2] = 0x00;
 410         sos_data[3] = 2 + 1 + (2 * NO_OF_COMPONENTS) + 3;
 411         sos_data[4] = NO_OF_COMPONENTS;
 412         for (i = 0; i < NO_OF_COMPONENTS; i++) {
 413                 sos_data[5 + (i * 2)] = i;      // index
 414                 sos_data[6 + (i * 2)] = (zr36060_td[i] << 4) |
 415                                         zr36060_ta[i]; // AC/DC tbl.sel.
 416         }
 417         sos_data[2 + 1 + (2 * NO_OF_COMPONENTS) + 2] = 00;      // scan start
 418         sos_data[2 + 1 + (2 * NO_OF_COMPONENTS) + 3] = 0x3f;
 419         sos_data[2 + 1 + (2 * NO_OF_COMPONENTS) + 4] = 00;
 420         return zr36060_pushit(ptr, ZR060_SOS_IDX,
 421                               4 + 1 + (2 * NO_OF_COMPONENTS) + 3,
 422                               sos_data);
 423 }
 424
 425 /* ------------------------------------------------------------------------- */
 426
 427 /* DRI (define restart interval) */
 428
 429 static int
 430 zr36060_set_dri (struct zr36060 *ptr)
 431 {
 432         char dri_data[6];       // max. size of register set
 433
 434         dprintk(3, "%s: write DRI\n", ptr->name);
 435         dri_data[0] = 0xff;
 436         dri_data[1] = 0xdd;
 437         dri_data[2] = 0x00;
 438         dri_data[3] = 0x04;
 439         dri_data[4] = (ptr->dri) >> 8;
 440         dri_data[5] = (ptr->dri) & 0xff;
 441         return zr36060_pushit(ptr, ZR060_DRI_IDX, 6, dri_data);
 442 }
 443
 444 /* =========================================================================
 445    Setup function:
 446
 447    Setup compression/decompression of Zoran's JPEG processor
 448    ( see also zoran 36060 manual )
 449
 450    ... sorry for the spaghetti code ...
 451    ========================================================================= */
 452 static void
 453 zr36060_init (struct zr36060 *ptr)
 454 {
 455         int sum = 0;
 456         long bitcnt, tmp;
 457
 458         if (ptr->mode == CODEC_DO_COMPRESSION) {
 459                 dprintk(2, "%s: COMPRESSION SETUP\n", ptr->name);
 460
 461                 zr36060_write(ptr, ZR060_LOAD, ZR060_LOAD_SyncRst);
 462
 463                 /* 060 communicates with 067 in master mode */
 464                 zr36060_write(ptr, ZR060_CIR, ZR060_CIR_CodeMstr);
 465
 466                 /* Compression with or without variable scale factor */
 467                 /*FIXME: What about ptr->bitrate_ctrl? */
 468                 zr36060_write(ptr, ZR060_CMR,
 469                               ZR060_CMR_Comp | ZR060_CMR_Pass2 |
 470                               ZR060_CMR_BRB);
 471
 472                 /* Must be zero */
 473                 zr36060_write(ptr, ZR060_MBZ, 0x00);
 474                 zr36060_write(ptr, ZR060_TCR_HI, 0x00);
 475                 zr36060_write(ptr, ZR060_TCR_LO, 0x00);
 476
 477                 /* Disable all IRQs - no DataErr means autoreset */
 478                 zr36060_write(ptr, ZR060_IMR, 0);
 479
 480                 /* volume control settings */
 481                 zr36060_write(ptr, ZR060_SF_HI, ptr->scalefact >> 8);
 482                 zr36060_write(ptr, ZR060_SF_LO, ptr->scalefact & 0xff);
 483
 484                 zr36060_write(ptr, ZR060_AF_HI, 0xff);
 485                 zr36060_write(ptr, ZR060_AF_M, 0xff);
 486                 zr36060_write(ptr, ZR060_AF_LO, 0xff);
 487
 488                 /* setup the variable jpeg tables */
 489                 sum += zr36060_set_sof(ptr);
 490                 sum += zr36060_set_sos(ptr);
 491                 sum += zr36060_set_dri(ptr);
 492
 493                 /* setup the fixed jpeg tables - maybe variable, though -
 494                  * (see table init section above) */
 495                 sum +=
 496                     zr36060_pushit(ptr, ZR060_DQT_IDX, sizeof(zr36060_dqt),
 497                                    zr36060_dqt);
 498                 sum +=
 499                     zr36060_pushit(ptr, ZR060_DHT_IDX, sizeof(zr36060_dht),
 500                                    zr36060_dht);
 501                 sum +=
 502                     zr36060_pushit(ptr, ZR060_APP_IDX, sizeof(zr36060_app),
 503                                    zr36060_app);
 504                 sum +=
 505                     zr36060_pushit(ptr, ZR060_COM_IDX, sizeof(zr36060_com),
 506                                    zr36060_com);
 507
 508                 /* setup misc. data for compression (target code sizes) */
 509
 510                 /* size of compressed code to reach without header data */
 511                 sum = ptr->real_code_vol - sum;
 512                 bitcnt = sum << 3;      /* need the size in bits */
 513
 514                 tmp = bitcnt >> 16;
 515                 dprintk(3,
 516                         "%s: code: csize=%d, tot=%d, bit=%ld, highbits=%ld\n",
 517                         ptr->name, sum, ptr->real_code_vol, bitcnt, tmp);
 518                 zr36060_write(ptr, ZR060_TCV_NET_HI, tmp >> 8);
 519                 zr36060_write(ptr, ZR060_TCV_NET_MH, tmp & 0xff);
 520                 tmp = bitcnt & 0xffff;
 521                 zr36060_write(ptr, ZR060_TCV_NET_ML, tmp >> 8);
 522                 zr36060_write(ptr, ZR060_TCV_NET_LO, tmp & 0xff);
 523
 524                 bitcnt -= bitcnt >> 7;  // bits without stuffing
 525                 bitcnt -= ((bitcnt * 5) >> 6);  // bits without eob
 526
 527                 tmp = bitcnt >> 16;
 528                 dprintk(3, "%s: code: nettobit=%ld, highnettobits=%ld\n",
 529                         ptr->name, bitcnt, tmp);
 530                 zr36060_write(ptr, ZR060_TCV_DATA_HI, tmp >> 8);
 531                 zr36060_write(ptr, ZR060_TCV_DATA_MH, tmp & 0xff);
 532                 tmp = bitcnt & 0xffff;
 533                 zr36060_write(ptr, ZR060_TCV_DATA_ML, tmp >> 8);
 534                 zr36060_write(ptr, ZR060_TCV_DATA_LO, tmp & 0xff);
 535
 536                 /* JPEG markers to be included in the compressed stream */
 537                 zr36060_write(ptr, ZR060_MER,
 538                               ZR060_MER_App | ZR060_MER_Com | ZR060_MER_DQT
 539                               | ZR060_MER_DHT);
 540
 541                 /* Setup the Video Frontend */
 542                 /* Limit pixel range to 16..235 as per CCIR-601 */
 543                 zr36060_write(ptr, ZR060_VCR, ZR060_VCR_Range);
 544
 545         } else {
 546                 dprintk(2, "%s: EXPANSION SETUP\n", ptr->name);
 547
 548                 zr36060_write(ptr, ZR060_LOAD, ZR060_LOAD_SyncRst);
 549
 550                 /* 060 communicates with 067 in master mode */
 551                 zr36060_write(ptr, ZR060_CIR, ZR060_CIR_CodeMstr);
 552
 553                 /* Decompression */
 554                 zr36060_write(ptr, ZR060_CMR, 0);
 555
 556                 /* Must be zero */
 557                 zr36060_write(ptr, ZR060_MBZ, 0x00);
 558                 zr36060_write(ptr, ZR060_TCR_HI, 0x00);
 559                 zr36060_write(ptr, ZR060_TCR_LO, 0x00);
 560
 561                 /* Disable all IRQs - no DataErr means autoreset */
 562                 zr36060_write(ptr, ZR060_IMR, 0);
 563
 564                 /* setup misc. data for expansion */
 565                 zr36060_write(ptr, ZR060_MER, 0);
 566
 567                 /* setup the fixed jpeg tables - maybe variable, though -
 568                  * (see table init section above) */
 569                 zr36060_pushit(ptr, ZR060_DHT_IDX, sizeof(zr36060_dht),
 570                                zr36060_dht);
 571
 572                 /* Setup the Video Frontend */
 573                 //zr36060_write(ptr, ZR060_VCR, ZR060_VCR_FIExt);
 574                 //this doesn't seem right and doesn't work...
 575                 zr36060_write(ptr, ZR060_VCR, ZR060_VCR_Range);
 576         }
 577
 578         /* Load the tables */
 579         zr36060_write(ptr, ZR060_LOAD,
 580                       ZR060_LOAD_SyncRst | ZR060_LOAD_Load);
 581         zr36060_wait_end(ptr);
 582         dprintk(2, "%s: Status after table preload: 0x%02x\n", ptr->name,
 583                 ptr->status);
 584
 585         if (ptr->status & ZR060_CFSR_Busy) {
 586                 dprintk(1, KERN_ERR "%s: init aborted!\n", ptr->name);
 587                 return;         // something is wrong, its timed out!!!!
 588         }
 589 }
 590
 591 /* =========================================================================
 592    CODEC API FUNCTIONS
 593
 594    this functions are accessed by the master via the API structure
 595    ========================================================================= */
 596
 597 /* set compression/expansion mode and launches codec -
 598    this should be the last call from the master before starting processing */
 599 static int
 600 zr36060_set_mode (struct videocodec *codec,
 601                   int                mode)
 602 {
 603         struct zr36060 *ptr = (struct zr36060 *) codec->data;
 604
 605         dprintk(2, "%s: set_mode %d call\n", ptr->name, mode);
 606
 607         if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION))
 608                 return -EINVAL;
 609
 610         ptr->mode = mode;
 611         zr36060_init(ptr);
 612
 613         return 0;
 614 }
 615
 616 /* set picture size (norm is ignored as the codec doesn't know about it) */
 617 static int
 618 zr36060_set_video (struct videocodec   *codec,
 619                    struct tvnorm       *norm,
 620                    struct vfe_settings *cap,
 621                    struct vfe_polarity *pol)
 622 {
 623         struct zr36060 *ptr = (struct zr36060 *) codec->data;
 624         u32 reg;
 625         int size;
 626
 627         dprintk(2, "%s: set_video %d/%d-%dx%d (%%%d) call\n", ptr->name,
 628                 cap->x, cap->y, cap->width, cap->height, cap->decimation);
 629
 630         /* if () return -EINVAL;
 631          * trust the master driver that it knows what it does - so
 632          * we allow invalid startx/y and norm for now ... */
 633         ptr->width = cap->width / (cap->decimation & 0xff);
 634         ptr->height = cap->height / (cap->decimation >> 8);
 635
 636         zr36060_write(ptr, ZR060_LOAD, ZR060_LOAD_SyncRst);
 637
 638         /* Note that VSPol/HSPol bits in zr36060 have the opposite
 639          * meaning of their zr360x7 counterparts with the same names
 640          * N.b. for VSPol this is only true if FIVEdge = 0 (default,
 641          * left unchanged here - in accordance with datasheet).
 642         */
 643         reg = (!pol->vsync_pol ? ZR060_VPR_VSPol : 0)
 644             | (!pol->hsync_pol ? ZR060_VPR_HSPol : 0)
 645             | (pol->field_pol ? ZR060_VPR_FIPol : 0)
 646             | (pol->blank_pol ? ZR060_VPR_BLPol : 0)
 647             | (pol->subimg_pol ? ZR060_VPR_SImgPol : 0)
 648             | (pol->poe_pol ? ZR060_VPR_PoePol : 0)
 649             | (pol->pvalid_pol ? ZR060_VPR_PValPol : 0)
 650             | (pol->vclk_pol ? ZR060_VPR_VCLKPol : 0);
 651         zr36060_write(ptr, ZR060_VPR, reg);
 652
 653         reg = 0;
 654         switch (cap->decimation & 0xff) {
 655         default:
 656         case 1:
 657                 break;
 658
 659         case 2:
 660                 reg |= ZR060_SR_HScale2;
 661                 break;
 662
 663         case 4:
 664                 reg |= ZR060_SR_HScale4;
 665                 break;
 666         }
 667
 668         switch (cap->decimation >> 8) {
 669         default:
 670         case 1:
 671                 break;
 672
 673         case 2:
 674                 reg |= ZR060_SR_VScale;
 675                 break;
 676         }
 677         zr36060_write(ptr, ZR060_SR, reg);
 678
 679         zr36060_write(ptr, ZR060_BCR_Y, 0x00);
 680         zr36060_write(ptr, ZR060_BCR_U, 0x80);
 681         zr36060_write(ptr, ZR060_BCR_V, 0x80);
 682
 683         /* sync generator */
 684
 685         reg = norm->Ht - 1;     /* Vtotal */
 686         zr36060_write(ptr, ZR060_SGR_VTOTAL_HI, (reg >> 8) & 0xff);
 687         zr36060_write(ptr, ZR060_SGR_VTOTAL_LO, (reg >> 0) & 0xff);
 688
 689         reg = norm->Wt - 1;     /* Htotal */
 690         zr36060_write(ptr, ZR060_SGR_HTOTAL_HI, (reg >> 8) & 0xff);
 691         zr36060_write(ptr, ZR060_SGR_HTOTAL_LO, (reg >> 0) & 0xff);
 692
 693         reg = 6 - 1;            /* VsyncSize */
 694         zr36060_write(ptr, ZR060_SGR_VSYNC, reg);
 695
 696         //reg   = 30 - 1;               /* HsyncSize */
 697 ///*CP*/        reg = (zr->params.norm == 1 ? 57 : 68);
 698         reg = 68;
 699         zr36060_write(ptr, ZR060_SGR_HSYNC, reg);
 700
 701         reg = norm->VStart - 1; /* BVstart */
 702         zr36060_write(ptr, ZR060_SGR_BVSTART, reg);
 703
 704         reg += norm->Ha / 2;    /* BVend */
 705         zr36060_write(ptr, ZR060_SGR_BVEND_HI, (reg >> 8) & 0xff);
 706         zr36060_write(ptr, ZR060_SGR_BVEND_LO, (reg >> 0) & 0xff);
 707
 708         reg = norm->HStart - 1; /* BHstart */
 709         zr36060_write(ptr, ZR060_SGR_BHSTART, reg);
 710
 711         reg += norm->Wa;        /* BHend */
 712         zr36060_write(ptr, ZR060_SGR_BHEND_HI, (reg >> 8) & 0xff);
 713         zr36060_write(ptr, ZR060_SGR_BHEND_LO, (reg >> 0) & 0xff);
 714
 715         /* active area */
 716         reg = cap->y + norm->VStart;    /* Vstart */
 717         zr36060_write(ptr, ZR060_AAR_VSTART_HI, (reg >> 8) & 0xff);
 718         zr36060_write(ptr, ZR060_AAR_VSTART_LO, (reg >> 0) & 0xff);
 719
 720         reg += cap->height;     /* Vend */
 721         zr36060_write(ptr, ZR060_AAR_VEND_HI, (reg >> 8) & 0xff);
 722         zr36060_write(ptr, ZR060_AAR_VEND_LO, (reg >> 0) & 0xff);
 723
 724         reg = cap->x + norm->HStart;    /* Hstart */
 725         zr36060_write(ptr, ZR060_AAR_HSTART_HI, (reg >> 8) & 0xff);
 726         zr36060_write(ptr, ZR060_AAR_HSTART_LO, (reg >> 0) & 0xff);
 727
 728         reg += cap->width;      /* Hend */
 729         zr36060_write(ptr, ZR060_AAR_HEND_HI, (reg >> 8) & 0xff);
 730         zr36060_write(ptr, ZR060_AAR_HEND_LO, (reg >> 0) & 0xff);
 731
 732         /* subimage area */
 733         reg = norm->VStart - 4; /* SVstart */
 734         zr36060_write(ptr, ZR060_SWR_VSTART_HI, (reg >> 8) & 0xff);
 735         zr36060_write(ptr, ZR060_SWR_VSTART_LO, (reg >> 0) & 0xff);
 736
 737         reg += norm->Ha / 2 + 8;        /* SVend */
 738         zr36060_write(ptr, ZR060_SWR_VEND_HI, (reg >> 8) & 0xff);
 739         zr36060_write(ptr, ZR060_SWR_VEND_LO, (reg >> 0) & 0xff);
 740
 741         reg = norm->HStart /*+ 64 */  - 4;      /* SHstart */
 742         zr36060_write(ptr, ZR060_SWR_HSTART_HI, (reg >> 8) & 0xff);
 743         zr36060_write(ptr, ZR060_SWR_HSTART_LO, (reg >> 0) & 0xff);
 744
 745         reg += norm->Wa + 8;    /* SHend */
 746         zr36060_write(ptr, ZR060_SWR_HEND_HI, (reg >> 8) & 0xff);
 747         zr36060_write(ptr, ZR060_SWR_HEND_LO, (reg >> 0) & 0xff);
 748
 749         size = ptr->width * ptr->height;
 750         /* Target compressed field size in bits: */
 751         size = size * 16;       /* uncompressed size in bits */
 752         /* (Ronald) by default, quality = 100 is a compression
 753          * ratio 1:2. Setting low_bitrate (insmod option) sets
 754          * it to 1:4 (instead of 1:2, zr36060 max) as limit because the
 755          * buz can't handle more at decimation=1... Use low_bitrate if
 756          * you have a Buz, unless you know what you're doing */
 757         size = size * cap->quality / (low_bitrate ? 400 : 200);
 758         /* Lower limit (arbitrary, 1 KB) */
 759         if (size < 8192)
 760                 size = 8192;
 761         /* Upper limit: 7/8 of the code buffers */
 762         if (size > ptr->total_code_vol * 7)
 763                 size = ptr->total_code_vol * 7;
 764
 765         ptr->real_code_vol = size >> 3; /* in bytes */
 766
 767         /* the MBCVR is the *maximum* block volume, according to the
 768          * JPEG ISO specs, this shouldn't be used, since that allows
 769          * for the best encoding quality. So set it to it's max value */
 770         reg = ptr->max_block_vol;
 771         zr36060_write(ptr, ZR060_MBCVR, reg);
 772
 773         return 0;
 774 }
 775
 776 /* additional control functions */
 777 static int
 778 zr36060_control (struct videocodec *codec,
 779                  int                type,
 780                  int                size,
 781                  void              *data)
 782 {
 783         struct zr36060 *ptr = (struct zr36060 *) codec->data;
 784         int *ival = (int *) data;
 785
 786         dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type,
 787                 size);
 788
 789         switch (type) {
 790         case CODEC_G_STATUS:    /* get last status */
 791                 if (size != sizeof(int))
 792                         return -EFAULT;
 793                 zr36060_read_status(ptr);
 794                 *ival = ptr->status;
 795                 break;
 796
 797         case CODEC_G_CODEC_MODE:
 798                 if (size != sizeof(int))
 799                         return -EFAULT;
 800                 *ival = CODEC_MODE_BJPG;
 801                 break;
 802
 803         case CODEC_S_CODEC_MODE:
 804                 if (size != sizeof(int))
 805                         return -EFAULT;
 806                 if (*ival != CODEC_MODE_BJPG)
 807                         return -EINVAL;
 808                 /* not needed, do nothing */
 809                 return 0;
 810
 811         case CODEC_G_VFE:
 812         case CODEC_S_VFE:
 813                 /* not needed, do nothing */
 814                 return 0;
 815
 816         case CODEC_S_MMAP:
 817                 /* not available, give an error */
 818                 return -ENXIO;
 819
 820         case CODEC_G_JPEG_TDS_BYTE:     /* get target volume in byte */
 821                 if (size != sizeof(int))
 822                         return -EFAULT;
 823                 *ival = ptr->total_code_vol;
 824                 break;
 825
 826         case CODEC_S_JPEG_TDS_BYTE:     /* get target volume in byte */
 827                 if (size != sizeof(int))
 828                         return -EFAULT;
 829                 ptr->total_code_vol = *ival;
 830                 ptr->real_code_vol = (ptr->total_code_vol * 6) >> 3;
 831                 break;
 832
 833         case CODEC_G_JPEG_SCALE:        /* get scaling factor */
 834                 if (size != sizeof(int))
 835                         return -EFAULT;
 836                 *ival = zr36060_read_scalefactor(ptr);
 837                 break;
 838
 839         case CODEC_S_JPEG_SCALE:        /* set scaling factor */
 840                 if (size != sizeof(int))
 841                         return -EFAULT;
 842                 ptr->scalefact = *ival;
 843                 break;
 844         default:
 845                 return -EINVAL;
 846         }
 847
 848         return size;
 849 }
 850
 851 /* =========================================================================
 852    Exit and unregister function:
 853
 854    Deinitializes Zoran's JPEG processor
 855    ========================================================================= */
 856
 857 static int
 858 zr36060_unset (struct videocodec *codec)
 859 {
 860         struct zr36060 *ptr = codec->data;
 861
 862         if (ptr) {
 863                 /* do wee need some codec deinit here, too ???? */
 864
 865                 dprintk(1, "%s: finished codec #%d\n", ptr->name,
 866                         ptr->num);
 867                 kfree(ptr);
 868                 codec->data = NULL;
 869
 870                 zr36060_codecs--;
 871                 return 0;
 872         }
 873
 874         return -EFAULT;
 875 }
 876
 877 /* =========================================================================
 878    Setup and registry function:
 879
 880    Initializes Zoran's JPEG processor
 881
 882    Also sets pixel size, average code size, mode (compr./decompr.)
 883    (the given size is determined by the processor with the video interface)
 884    ========================================================================= */
 885
 886 static int
 887 zr36060_setup (struct videocodec *codec)
 888 {
 889         struct zr36060 *ptr;
 890         int res;
 891
 892         dprintk(2, "zr36060: initializing MJPEG subsystem #%d.\n",
 893                 zr36060_codecs);
 894
 895         if (zr36060_codecs == MAX_CODECS) {
 896                 dprintk(1,
 897                         KERN_ERR "zr36060: Can't attach more codecs!\n");
 898                 return -ENOSPC;
 899         }
 900         //mem structure init
 901         codec->data = ptr = kmalloc(sizeof(struct zr36060), GFP_KERNEL);
 902         if (NULL == ptr) {
 903                 dprintk(1, KERN_ERR "zr36060: Can't get enough memory!\n");
 904                 return -ENOMEM;
 905         }
 906         memset(ptr, 0, sizeof(struct zr36060));
 907
 908         snprintf(ptr->name, sizeof(ptr->name), "zr36060[%d]",
 909                  zr36060_codecs);
 910         ptr->num = zr36060_codecs++;
 911         ptr->codec = codec;
 912
 913         //testing
 914         res = zr36060_basic_test(ptr);
 915         if (res < 0) {
 916                 zr36060_unset(codec);
 917                 return res;
 918         }
 919         //final setup
 920         memcpy(ptr->h_samp_ratio, zr36060_decimation_h, 8);
 921         memcpy(ptr->v_samp_ratio, zr36060_decimation_v, 8);
 922
 923         ptr->bitrate_ctrl = 0;  /* 0 or 1 - fixed file size flag
 924                                  * (what is the difference?) */
 925         ptr->mode = CODEC_DO_COMPRESSION;
 926         ptr->width = 384;
 927         ptr->height = 288;
 928         ptr->total_code_vol = 16000;    /* CHECKME */
 929         ptr->real_code_vol = (ptr->total_code_vol * 6) >> 3;
 930         ptr->max_block_vol = 240;       /* CHECKME, was 120 is 240 */
 931         ptr->scalefact = 0x100;
 932         ptr->dri = 1;           /* CHECKME, was 8 is 1 */
 933         zr36060_init(ptr);
 934
 935         dprintk(1, KERN_INFO "%s: codec attached and running\n",
 936                 ptr->name);
 937
 938         return 0;
 939 }
 940
 941 static const struct videocodec zr36060_codec = {
 942         .owner = THIS_MODULE,
 943         .name = "zr36060",
 944         .magic = 0L,            // magic not used
 945         .flags =
 946             CODEC_FLAG_JPEG | CODEC_FLAG_HARDWARE | CODEC_FLAG_ENCODER |
 947             CODEC_FLAG_DECODER | CODEC_FLAG_VFE,
 948         .type = CODEC_TYPE_ZR36060,
 949         .setup = zr36060_setup, // functionality
 950         .unset = zr36060_unset,
 951         .set_mode = zr36060_set_mode,
 952         .set_video = zr36060_set_video,
 953         .control = zr36060_control,
 954         // others are not used
 955 };
 956
 957 /* =========================================================================
 958    HOOK IN DRIVER AS KERNEL MODULE
 959    ========================================================================= */
 960
 961 static int __init
 962 zr36060_init_module (void)
 963 {
 964         //dprintk(1, "zr36060 driver %s\n",ZR060_VERSION);
 965         zr36060_codecs = 0;
 966         return videocodec_register(&zr36060_codec);
 967 }
 968
 969 static void __exit
 970 zr36060_cleanup_module (void)
 971 {
 972         if (zr36060_codecs) {
 973                 dprintk(1,
 974                         "zr36060: something's wrong - %d codecs left somehow.\n",
 975                         zr36060_codecs);
 976         }
 977
 978         /* however, we can't just stay alive */
 979         videocodec_unregister(&zr36060_codec);
 980 }
 981
 982 module_init(zr36060_init_module);
 983 module_exit(zr36060_cleanup_module);
 984
 985 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@skynet.be>");
 986 MODULE_DESCRIPTION("Driver module for ZR36060 jpeg processors "
 987                    ZR060_VERSION);
 988 MODULE_LICENSE("GPL");