LXR linux/drivers/media/video/saa7110.c

   1/*
   2 * saa7110 - Philips SAA7110(A) video decoder driver
   3 *
   4 * Copyright (C) 1998 Pauline Middelink <middelin@polyware.nl>
   5 *
   6 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8 *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9 *
  10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  12 *
  13 * This program is free software; you can redistribute it and/or modify
  14 * it under the terms of the GNU General Public License as published by
  15 * the Free Software Foundation; either version 2 of the License, or
  16 * (at your option) any later version.
  17 *
  18 * This program is distributed in the hope that it will be useful,
  19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21 * GNU General Public License for more details.
  22 *
  23 * You should have received a copy of the GNU General Public License
  24 * along with this program; if not, write to the Free Software
  25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26 */
  27
  28#include <linux/module.h>
  29#include <linux/init.h>
  30#include <linux/types.h>
  31#include <linux/delay.h>
  32#include <linux/slab.h>
  33#include <linux/wait.h>
  34#include <asm/uaccess.h>
  35#include <linux/i2c.h>
  36#include <linux/videodev2.h>
  37#include <media/v4l2-device.h>
  38#include <media/v4l2-chip-ident.h>
  39#include <media/v4l2-i2c-drv.h>
  40
  41MODULE_DESCRIPTION("Philips SAA7110 video decoder driver");
  42MODULE_AUTHOR("Pauline Middelink");
  43MODULE_LICENSE("GPL");
  44
  45
  46static int debug;
  47module_param(debug, int, 0);
  48MODULE_PARM_DESC(debug, "Debug level (0-1)");
  49
  50#define SAA7110_MAX_INPUT       9       /* 6 CVBS, 3 SVHS */
  51#define SAA7110_MAX_OUTPUT      1       /* 1 YUV */
  52
  53#define SAA7110_NR_REG          0x35
  54
  55struct saa7110 {
  56        struct v4l2_subdev sd;
  57        u8 reg[SAA7110_NR_REG];
  58
  59        v4l2_std_id norm;
  60        int input;
  61        int enable;
  62        int bright;
  63        int contrast;
  64        int hue;
  65        int sat;
  66
  67        wait_queue_head_t wq;
  68};
  69
  70static inline struct saa7110 *to_saa7110(struct v4l2_subdev *sd)
  71{
  72        return container_of(sd, struct saa7110, sd);
  73}
  74
  75/* ----------------------------------------------------------------------- */
  76/* I2C support functions                                                   */
  77/* ----------------------------------------------------------------------- */
  78
  79static int saa7110_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  80{
  81        struct i2c_client *client = v4l2_get_subdevdata(sd);
  82        struct saa7110 *decoder = to_saa7110(sd);
  83
  84        decoder->reg[reg] = value;
  85        return i2c_smbus_write_byte_data(client, reg, value);
  86}
  87
  88static int saa7110_write_block(struct v4l2_subdev *sd, const u8 *data, unsigned int len)
  89{
  90        struct i2c_client *client = v4l2_get_subdevdata(sd);
  91        struct saa7110 *decoder = to_saa7110(sd);
  92        int ret = -1;
  93        u8 reg = *data;         /* first register to write to */
  94
  95        /* Sanity check */
  96        if (reg + (len - 1) > SAA7110_NR_REG)
  97                return ret;
  98
  99        /* the saa7110 has an autoincrement function, use it if
 100         * the adapter understands raw I2C */
 101        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 102                ret = i2c_master_send(client, data, len);
 103
 104                /* Cache the written data */
 105                memcpy(decoder->reg + reg, data + 1, len - 1);
 106        } else {
 107                for (++data, --len; len; len--) {
 108                        ret = saa7110_write(sd, reg++, *data++);
 109                        if (ret < 0)
 110                                break;
 111                }
 112        }
 113
 114        return ret;
 115}
 116
 117static inline int saa7110_read(struct v4l2_subdev *sd)
 118{
 119        struct i2c_client *client = v4l2_get_subdevdata(sd);
 120
 121        return i2c_smbus_read_byte(client);
 122}
 123
 124/* ----------------------------------------------------------------------- */
 125/* SAA7110 functions                                                       */
 126/* ----------------------------------------------------------------------- */
 127
 128#define FRESP_06H_COMPST 0x03   /*0x13*/
 129#define FRESP_06H_SVIDEO 0x83   /*0xC0*/
 130
 131
 132static int saa7110_selmux(struct v4l2_subdev *sd, int chan)
 133{
 134        static const unsigned char modes[9][8] = {
 135                /* mode 0 */
 136                {FRESP_06H_COMPST, 0xD9, 0x17, 0x40, 0x03,
 137                              0x44, 0x75, 0x16},
 138                /* mode 1 */
 139                {FRESP_06H_COMPST, 0xD8, 0x17, 0x40, 0x03,
 140                              0x44, 0x75, 0x16},
 141                /* mode 2 */
 142                {FRESP_06H_COMPST, 0xBA, 0x07, 0x91, 0x03,
 143                              0x60, 0xB5, 0x05},
 144                /* mode 3 */
 145                {FRESP_06H_COMPST, 0xB8, 0x07, 0x91, 0x03,
 146                              0x60, 0xB5, 0x05},
 147                /* mode 4 */
 148                {FRESP_06H_COMPST, 0x7C, 0x07, 0xD2, 0x83,
 149                              0x60, 0xB5, 0x03},
 150                /* mode 5 */
 151                {FRESP_06H_COMPST, 0x78, 0x07, 0xD2, 0x83,
 152                              0x60, 0xB5, 0x03},
 153                /* mode 6 */
 154                {FRESP_06H_SVIDEO, 0x59, 0x17, 0x42, 0xA3,
 155                              0x44, 0x75, 0x12},
 156                /* mode 7 */
 157                {FRESP_06H_SVIDEO, 0x9A, 0x17, 0xB1, 0x13,
 158                              0x60, 0xB5, 0x14},
 159                /* mode 8 */
 160                {FRESP_06H_SVIDEO, 0x3C, 0x27, 0xC1, 0x23,
 161                              0x44, 0x75, 0x21}
 162        };
 163        struct saa7110 *decoder = to_saa7110(sd);
 164        const unsigned char *ptr = modes[chan];
 165
 166        saa7110_write(sd, 0x06, ptr[0]);        /* Luminance control    */
 167        saa7110_write(sd, 0x20, ptr[1]);        /* Analog Control #1    */
 168        saa7110_write(sd, 0x21, ptr[2]);        /* Analog Control #2    */
 169        saa7110_write(sd, 0x22, ptr[3]);        /* Mixer Control #1     */
 170        saa7110_write(sd, 0x2C, ptr[4]);        /* Mixer Control #2     */
 171        saa7110_write(sd, 0x30, ptr[5]);        /* ADCs gain control    */
 172        saa7110_write(sd, 0x31, ptr[6]);        /* Mixer Control #3     */
 173        saa7110_write(sd, 0x21, ptr[7]);        /* Analog Control #2    */
 174        decoder->input = chan;
 175
 176        return 0;
 177}
 178
 179static const unsigned char initseq[1 + SAA7110_NR_REG] = {
 180        0, 0x4C, 0x3C, 0x0D, 0xEF, 0xBD, 0xF2, 0x03, 0x00,
 181        /* 0x08 */ 0xF8, 0xF8, 0x60, 0x60, 0x00, 0x86, 0x18, 0x90,
 182        /* 0x10 */ 0x00, 0x59, 0x40, 0x46, 0x42, 0x1A, 0xFF, 0xDA,
 183        /* 0x18 */ 0xF2, 0x8B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 184        /* 0x20 */ 0xD9, 0x16, 0x40, 0x41, 0x80, 0x41, 0x80, 0x4F,
 185        /* 0x28 */ 0xFE, 0x01, 0xCF, 0x0F, 0x03, 0x01, 0x03, 0x0C,
 186        /* 0x30 */ 0x44, 0x71, 0x02, 0x8C, 0x02
 187};
 188
 189static v4l2_std_id determine_norm(struct v4l2_subdev *sd)
 190{
 191        DEFINE_WAIT(wait);
 192        struct saa7110 *decoder = to_saa7110(sd);
 193        int status;
 194
 195        /* mode changed, start automatic detection */
 196        saa7110_write_block(sd, initseq, sizeof(initseq));
 197        saa7110_selmux(sd, decoder->input);
 198        prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 199        schedule_timeout(msecs_to_jiffies(250));
 200        finish_wait(&decoder->wq, &wait);
 201        status = saa7110_read(sd);
 202        if (status & 0x40) {
 203                v4l2_dbg(1, debug, sd, "status=0x%02x (no signal)\n", status);
 204                return decoder->norm;   /* no change*/
 205        }
 206        if ((status & 3) == 0) {
 207                saa7110_write(sd, 0x06, 0x83);
 208                if (status & 0x20) {
 209                        v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC/no color)\n", status);
 210                        /*saa7110_write(sd,0x2E,0x81);*/
 211                        return V4L2_STD_NTSC;
 212                }
 213                v4l2_dbg(1, debug, sd, "status=0x%02x (PAL/no color)\n", status);
 214                /*saa7110_write(sd,0x2E,0x9A);*/
 215                return V4L2_STD_PAL;
 216        }
 217        /*saa7110_write(sd,0x06,0x03);*/
 218        if (status & 0x20) {    /* 60Hz */
 219                v4l2_dbg(1, debug, sd, "status=0x%02x (NTSC)\n", status);
 220                saa7110_write(sd, 0x0D, 0x86);
 221                saa7110_write(sd, 0x0F, 0x50);
 222                saa7110_write(sd, 0x11, 0x2C);
 223                /*saa7110_write(sd,0x2E,0x81);*/
 224                return V4L2_STD_NTSC;
 225        }
 226
 227        /* 50Hz -> PAL/SECAM */
 228        saa7110_write(sd, 0x0D, 0x86);
 229        saa7110_write(sd, 0x0F, 0x10);
 230        saa7110_write(sd, 0x11, 0x59);
 231        /*saa7110_write(sd,0x2E,0x9A);*/
 232
 233        prepare_to_wait(&decoder->wq, &wait, TASK_UNINTERRUPTIBLE);
 234        schedule_timeout(msecs_to_jiffies(250));
 235        finish_wait(&decoder->wq, &wait);
 236
 237        status = saa7110_read(sd);
 238        if ((status & 0x03) == 0x01) {
 239                v4l2_dbg(1, debug, sd, "status=0x%02x (SECAM)\n", status);
 240                saa7110_write(sd, 0x0D, 0x87);
 241                return V4L2_STD_SECAM;
 242        }
 243        v4l2_dbg(1, debug, sd, "status=0x%02x (PAL)\n", status);
 244        return V4L2_STD_PAL;
 245}
 246
 247static int saa7110_g_input_status(struct v4l2_subdev *sd, u32 *pstatus)
 248{
 249        struct saa7110 *decoder = to_saa7110(sd);
 250        int res = V4L2_IN_ST_NO_SIGNAL;
 251        int status = saa7110_read(sd);
 252
 253        v4l2_dbg(1, debug, sd, "status=0x%02x norm=%llx\n",
 254                       status, (unsigned long long)decoder->norm);
 255        if (!(status & 0x40))
 256                res = 0;
 257        if (!(status & 0x03))
 258                res |= V4L2_IN_ST_NO_COLOR;
 259
 260        *pstatus = res;
 261        return 0;
 262}
 263
 264static int saa7110_querystd(struct v4l2_subdev *sd, v4l2_std_id *std)
 265{
 266        *(v4l2_std_id *)std = determine_norm(sd);
 267        return 0;
 268}
 269
 270static int saa7110_s_std(struct v4l2_subdev *sd, v4l2_std_id std)
 271{
 272        struct saa7110 *decoder = to_saa7110(sd);
 273
 274        if (decoder->norm != std) {
 275                decoder->norm = std;
 276                /*saa7110_write(sd, 0x06, 0x03);*/
 277                if (std & V4L2_STD_NTSC) {
 278                        saa7110_write(sd, 0x0D, 0x86);
 279                        saa7110_write(sd, 0x0F, 0x50);
 280                        saa7110_write(sd, 0x11, 0x2C);
 281                        /*saa7110_write(sd, 0x2E, 0x81);*/
 282                        v4l2_dbg(1, debug, sd, "switched to NTSC\n");
 283                } else if (std & V4L2_STD_PAL) {
 284                        saa7110_write(sd, 0x0D, 0x86);
 285                        saa7110_write(sd, 0x0F, 0x10);
 286                        saa7110_write(sd, 0x11, 0x59);
 287                        /*saa7110_write(sd, 0x2E, 0x9A);*/
 288                        v4l2_dbg(1, debug, sd, "switched to PAL\n");
 289                } else if (std & V4L2_STD_SECAM) {
 290                        saa7110_write(sd, 0x0D, 0x87);
 291                        saa7110_write(sd, 0x0F, 0x10);
 292                        saa7110_write(sd, 0x11, 0x59);
 293                        /*saa7110_write(sd, 0x2E, 0x9A);*/
 294                        v4l2_dbg(1, debug, sd, "switched to SECAM\n");
 295                } else {
 296                        return -EINVAL;
 297                }
 298        }
 299        return 0;
 300}
 301
 302static int saa7110_s_routing(struct v4l2_subdev *sd,
 303                             u32 input, u32 output, u32 config)
 304{
 305        struct saa7110 *decoder = to_saa7110(sd);
 306
 307        if (input < 0 || input >= SAA7110_MAX_INPUT) {
 308                v4l2_dbg(1, debug, sd, "input=%d not available\n", input);
 309                return -EINVAL;
 310        }
 311        if (decoder->input != input) {
 312                saa7110_selmux(sd, input);
 313                v4l2_dbg(1, debug, sd, "switched to input=%d\n", input);
 314        }
 315        return 0;
 316}
 317
 318static int saa7110_s_stream(struct v4l2_subdev *sd, int enable)
 319{
 320        struct saa7110 *decoder = to_saa7110(sd);
 321
 322        if (decoder->enable != enable) {
 323                decoder->enable = enable;
 324                saa7110_write(sd, 0x0E, enable ? 0x18 : 0x80);
 325                v4l2_dbg(1, debug, sd, "YUV %s\n", enable ? "on" : "off");
 326        }
 327        return 0;
 328}
 329
 330static int saa7110_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
 331{
 332        switch (qc->id) {
 333        case V4L2_CID_BRIGHTNESS:
 334                return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
 335        case V4L2_CID_CONTRAST:
 336        case V4L2_CID_SATURATION:
 337                return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
 338        case V4L2_CID_HUE:
 339                return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
 340        default:
 341                return -EINVAL;
 342        }
 343        return 0;
 344}
 345
 346static int saa7110_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 347{
 348        struct saa7110 *decoder = to_saa7110(sd);
 349
 350        switch (ctrl->id) {
 351        case V4L2_CID_BRIGHTNESS:
 352                ctrl->value = decoder->bright;
 353                break;
 354        case V4L2_CID_CONTRAST:
 355                ctrl->value = decoder->contrast;
 356                break;
 357        case V4L2_CID_SATURATION:
 358                ctrl->value = decoder->sat;
 359                break;
 360        case V4L2_CID_HUE:
 361                ctrl->value = decoder->hue;
 362                break;
 363        default:
 364                return -EINVAL;
 365        }
 366        return 0;
 367}
 368
 369static int saa7110_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 370{
 371        struct saa7110 *decoder = to_saa7110(sd);
 372
 373        switch (ctrl->id) {
 374        case V4L2_CID_BRIGHTNESS:
 375                if (decoder->bright != ctrl->value) {
 376                        decoder->bright = ctrl->value;
 377                        saa7110_write(sd, 0x19, decoder->bright);
 378                }
 379                break;
 380        case V4L2_CID_CONTRAST:
 381                if (decoder->contrast != ctrl->value) {
 382                        decoder->contrast = ctrl->value;
 383                        saa7110_write(sd, 0x13, decoder->contrast);
 384                }
 385                break;
 386        case V4L2_CID_SATURATION:
 387                if (decoder->sat != ctrl->value) {
 388                        decoder->sat = ctrl->value;
 389                        saa7110_write(sd, 0x12, decoder->sat);
 390                }
 391                break;
 392        case V4L2_CID_HUE:
 393                if (decoder->hue != ctrl->value) {
 394                        decoder->hue = ctrl->value;
 395                        saa7110_write(sd, 0x07, decoder->hue);
 396                }
 397                break;
 398        default:
 399                return -EINVAL;
 400        }
 401        return 0;
 402}
 403
 404static int saa7110_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 405{
 406        struct i2c_client *client = v4l2_get_subdevdata(sd);
 407
 408        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7110, 0);
 409}
 410
 411/* ----------------------------------------------------------------------- */
 412
 413static const struct v4l2_subdev_core_ops saa7110_core_ops = {
 414        .g_chip_ident = saa7110_g_chip_ident,
 415        .g_ctrl = saa7110_g_ctrl,
 416        .s_ctrl = saa7110_s_ctrl,
 417        .queryctrl = saa7110_queryctrl,
 418        .s_std = saa7110_s_std,
 419};
 420
 421static const struct v4l2_subdev_video_ops saa7110_video_ops = {
 422        .s_routing = saa7110_s_routing,
 423        .s_stream = saa7110_s_stream,
 424        .querystd = saa7110_querystd,
 425        .g_input_status = saa7110_g_input_status,
 426};
 427
 428static const struct v4l2_subdev_ops saa7110_ops = {
 429        .core = &saa7110_core_ops,
 430        .video = &saa7110_video_ops,
 431};
 432
 433/* ----------------------------------------------------------------------- */
 434
 435static int saa7110_probe(struct i2c_client *client,
 436                        const struct i2c_device_id *id)
 437{
 438        struct saa7110 *decoder;
 439        struct v4l2_subdev *sd;
 440        int rv;
 441
 442        /* Check if the adapter supports the needed features */
 443        if (!i2c_check_functionality(client->adapter,
 444                I2C_FUNC_SMBUS_READ_BYTE | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
 445                return -ENODEV;
 446
 447        v4l_info(client, "chip found @ 0x%x (%s)\n",
 448                        client->addr << 1, client->adapter->name);
 449
 450        decoder = kzalloc(sizeof(struct saa7110), GFP_KERNEL);
 451        if (!decoder)
 452                return -ENOMEM;
 453        sd = &decoder->sd;
 454        v4l2_i2c_subdev_init(sd, client, &saa7110_ops);
 455        decoder->norm = V4L2_STD_PAL;
 456        decoder->input = 0;
 457        decoder->enable = 1;
 458        decoder->bright = 32768;
 459        decoder->contrast = 32768;
 460        decoder->hue = 32768;
 461        decoder->sat = 32768;
 462        init_waitqueue_head(&decoder->wq);
 463
 464        rv = saa7110_write_block(sd, initseq, sizeof(initseq));
 465        if (rv < 0) {
 466                v4l2_dbg(1, debug, sd, "init status %d\n", rv);
 467        } else {
 468                int ver, status;
 469                saa7110_write(sd, 0x21, 0x10);
 470                saa7110_write(sd, 0x0e, 0x18);
 471                saa7110_write(sd, 0x0D, 0x04);
 472                ver = saa7110_read(sd);
 473                saa7110_write(sd, 0x0D, 0x06);
 474                /*mdelay(150);*/
 475                status = saa7110_read(sd);
 476                v4l2_dbg(1, debug, sd, "version %x, status=0x%02x\n",
 477                               ver, status);
 478                saa7110_write(sd, 0x0D, 0x86);
 479                saa7110_write(sd, 0x0F, 0x10);
 480                saa7110_write(sd, 0x11, 0x59);
 481                /*saa7110_write(sd, 0x2E, 0x9A);*/
 482        }
 483
 484        /*saa7110_selmux(sd,0);*/
 485        /*determine_norm(sd);*/
 486        /* setup and implicit mode 0 select has been performed */
 487
 488        return 0;
 489}
 490
 491static int saa7110_remove(struct i2c_client *client)
 492{
 493        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 494
 495        v4l2_device_unregister_subdev(sd);
 496        kfree(to_saa7110(sd));
 497        return 0;
 498}
 499
 500/* ----------------------------------------------------------------------- */
 501
 502static const struct i2c_device_id saa7110_id[] = {
 503        { "saa7110", 0 },
 504        { }
 505};
 506MODULE_DEVICE_TABLE(i2c, saa7110_id);
 507
 508static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 509        .name = "saa7110",
 510        .probe = saa7110_probe,
 511        .remove = saa7110_remove,
 512        .id_table = saa7110_id,
 513};
 514