LXR linux/drivers/media/i2c/adv7170.c

   1/*
   2 * adv7170 - adv7170, adv7171 video encoder driver version 0.0.1
   3 *
   4 * Copyright (C) 2002 Maxim Yevtyushkin <max@linuxmedialabs.com>
   5 *
   6 * Based on adv7176 driver by:
   7 *
   8 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   9 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
  10 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
  11 *    - some corrections for Pinnacle Systems Inc. DC10plus card.
  12 *
  13 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  14 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  15 *
  16 * This program is free software; you can redistribute it and/or modify
  17 * it under the terms of the GNU General Public License as published by
  18 * the Free Software Foundation; either version 2 of the License, or
  19 * (at your option) any later version.
  20 *
  21 * This program is distributed in the hope that it will be useful,
  22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 * GNU General Public License for more details.
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/types.h>
  29#include <linux/slab.h>
  30#include <linux/ioctl.h>
  31#include <linux/uaccess.h>
  32#include <linux/i2c.h>
  33#include <linux/videodev2.h>
  34#include <media/v4l2-device.h>
  35
  36MODULE_DESCRIPTION("Analog Devices ADV7170 video encoder driver");
  37MODULE_AUTHOR("Maxim Yevtyushkin");
  38MODULE_LICENSE("GPL");
  39
  40
  41static int debug;
  42module_param(debug, int, 0);
  43MODULE_PARM_DESC(debug, "Debug level (0-1)");
  44
  45/* ----------------------------------------------------------------------- */
  46
  47struct adv7170 {
  48        struct v4l2_subdev sd;
  49        unsigned char reg[128];
  50
  51        v4l2_std_id norm;
  52        int input;
  53};
  54
  55static inline struct adv7170 *to_adv7170(struct v4l2_subdev *sd)
  56{
  57        return container_of(sd, struct adv7170, sd);
  58}
  59
  60static char *inputs[] = { "pass_through", "play_back" };
  61
  62static u32 adv7170_codes[] = {
  63        MEDIA_BUS_FMT_UYVY8_2X8,
  64        MEDIA_BUS_FMT_UYVY8_1X16,
  65};
  66
  67/* ----------------------------------------------------------------------- */
  68
  69static inline int adv7170_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  70{
  71        struct i2c_client *client = v4l2_get_subdevdata(sd);
  72        struct adv7170 *encoder = to_adv7170(sd);
  73
  74        encoder->reg[reg] = value;
  75        return i2c_smbus_write_byte_data(client, reg, value);
  76}
  77
  78static inline int adv7170_read(struct v4l2_subdev *sd, u8 reg)
  79{
  80        struct i2c_client *client = v4l2_get_subdevdata(sd);
  81
  82        return i2c_smbus_read_byte_data(client, reg);
  83}
  84
  85static int adv7170_write_block(struct v4l2_subdev *sd,
  86                     const u8 *data, unsigned int len)
  87{
  88        struct i2c_client *client = v4l2_get_subdevdata(sd);
  89        struct adv7170 *encoder = to_adv7170(sd);
  90        int ret = -1;
  91        u8 reg;
  92
  93        /* the adv7170 has an autoincrement function, use it if
  94         * the adapter understands raw I2C */
  95        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  96                /* do raw I2C, not smbus compatible */
  97                u8 block_data[32];
  98                int block_len;
  99
 100                while (len >= 2) {
 101                        block_len = 0;
 102                        block_data[block_len++] = reg = data[0];
 103                        do {
 104                                block_data[block_len++] =
 105                                    encoder->reg[reg++] = data[1];
 106                                len -= 2;
 107                                data += 2;
 108                        } while (len >= 2 && data[0] == reg && block_len < 32);
 109                        ret = i2c_master_send(client, block_data, block_len);
 110                        if (ret < 0)
 111                                break;
 112                }
 113        } else {
 114                /* do some slow I2C emulation kind of thing */
 115                while (len >= 2) {
 116                        reg = *data++;
 117                        ret = adv7170_write(sd, reg, *data++);
 118                        if (ret < 0)
 119                                break;
 120                        len -= 2;
 121                }
 122        }
 123        return ret;
 124}
 125
 126/* ----------------------------------------------------------------------- */
 127
 128#define TR0MODE     0x4c
 129#define TR0RST      0x80
 130
 131#define TR1CAPT     0x00
 132#define TR1PLAY     0x00
 133
 134static const unsigned char init_NTSC[] = {
 135        0x00, 0x10,             /* MR0 */
 136        0x01, 0x20,             /* MR1 */
 137        0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 138        0x03, 0x80,             /* MR3 */
 139        0x04, 0x30,             /* MR4 */
 140        0x05, 0x00,             /* Reserved */
 141        0x06, 0x00,             /* Reserved */
 142        0x07, TR0MODE,          /* TM0 */
 143        0x08, TR1CAPT,          /* TM1 */
 144        0x09, 0x16,             /* Fsc0 */
 145        0x0a, 0x7c,             /* Fsc1 */
 146        0x0b, 0xf0,             /* Fsc2 */
 147        0x0c, 0x21,             /* Fsc3 */
 148        0x0d, 0x00,             /* Subcarrier Phase */
 149        0x0e, 0x00,             /* Closed Capt. Ext 0 */
 150        0x0f, 0x00,             /* Closed Capt. Ext 1 */
 151        0x10, 0x00,             /* Closed Capt. 0 */
 152        0x11, 0x00,             /* Closed Capt. 1 */
 153        0x12, 0x00,             /* Pedestal Ctl 0 */
 154        0x13, 0x00,             /* Pedestal Ctl 1 */
 155        0x14, 0x00,             /* Pedestal Ctl 2 */
 156        0x15, 0x00,             /* Pedestal Ctl 3 */
 157        0x16, 0x00,             /* CGMS_WSS_0 */
 158        0x17, 0x00,             /* CGMS_WSS_1 */
 159        0x18, 0x00,             /* CGMS_WSS_2 */
 160        0x19, 0x00,             /* Teletext Ctl */
 161};
 162
 163static const unsigned char init_PAL[] = {
 164        0x00, 0x71,             /* MR0 */
 165        0x01, 0x20,             /* MR1 */
 166        0x02, 0x0e,             /* MR2 RTC control: bits 2 and 1 */
 167        0x03, 0x80,             /* MR3 */
 168        0x04, 0x30,             /* MR4 */
 169        0x05, 0x00,             /* Reserved */
 170        0x06, 0x00,             /* Reserved */
 171        0x07, TR0MODE,          /* TM0 */
 172        0x08, TR1CAPT,          /* TM1 */
 173        0x09, 0xcb,             /* Fsc0 */
 174        0x0a, 0x8a,             /* Fsc1 */
 175        0x0b, 0x09,             /* Fsc2 */
 176        0x0c, 0x2a,             /* Fsc3 */
 177        0x0d, 0x00,             /* Subcarrier Phase */
 178        0x0e, 0x00,             /* Closed Capt. Ext 0 */
 179        0x0f, 0x00,             /* Closed Capt. Ext 1 */
 180        0x10, 0x00,             /* Closed Capt. 0 */
 181        0x11, 0x00,             /* Closed Capt. 1 */
 182        0x12, 0x00,             /* Pedestal Ctl 0 */
 183        0x13, 0x00,             /* Pedestal Ctl 1 */
 184        0x14, 0x00,             /* Pedestal Ctl 2 */
 185        0x15, 0x00,             /* Pedestal Ctl 3 */
 186        0x16, 0x00,             /* CGMS_WSS_0 */
 187        0x17, 0x00,             /* CGMS_WSS_1 */
 188        0x18, 0x00,             /* CGMS_WSS_2 */
 189        0x19, 0x00,             /* Teletext Ctl */
 190};
 191
 192
 193static int adv7170_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 194{
 195        struct adv7170 *encoder = to_adv7170(sd);
 196
 197        v4l2_dbg(1, debug, sd, "set norm %llx\n", (unsigned long long)std);
 198
 199        if (std & V4L2_STD_NTSC) {
 200                adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 201                if (encoder->input == 0)
 202                        adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 203                adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 204                adv7170_write(sd, 0x07, TR0MODE);
 205        } else if (std & V4L2_STD_PAL) {
 206                adv7170_write_block(sd, init_PAL, sizeof(init_PAL));
 207                if (encoder->input == 0)
 208                        adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 209                adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 210                adv7170_write(sd, 0x07, TR0MODE);
 211        } else {
 212                v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 213                                (unsigned long long)std);
 214                return -EINVAL;
 215        }
 216        v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 217        encoder->norm = std;
 218        return 0;
 219}
 220
 221static int adv7170_s_routing(struct v4l2_subdev *sd,
 222                             u32 input, u32 output, u32 config)
 223{
 224        struct adv7170 *encoder = to_adv7170(sd);
 225
 226        /* RJ: input = 0: input is from decoder
 227           input = 1: input is from ZR36060
 228           input = 2: color bar */
 229
 230        v4l2_dbg(1, debug, sd, "set input from %s\n",
 231                        input == 0 ? "decoder" : "ZR36060");
 232
 233        switch (input) {
 234        case 0:
 235                adv7170_write(sd, 0x01, 0x20);
 236                adv7170_write(sd, 0x08, TR1CAPT);       /* TR1 */
 237                adv7170_write(sd, 0x02, 0x0e);  /* Enable genlock */
 238                adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 239                adv7170_write(sd, 0x07, TR0MODE);
 240                /* udelay(10); */
 241                break;
 242
 243        case 1:
 244                adv7170_write(sd, 0x01, 0x00);
 245                adv7170_write(sd, 0x08, TR1PLAY);       /* TR1 */
 246                adv7170_write(sd, 0x02, 0x08);
 247                adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 248                adv7170_write(sd, 0x07, TR0MODE);
 249                /* udelay(10); */
 250                break;
 251
 252        default:
 253                v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 254                return -EINVAL;
 255        }
 256        v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 257        encoder->input = input;
 258        return 0;
 259}
 260
 261static int adv7170_enum_mbus_code(struct v4l2_subdev *sd,
 262                struct v4l2_subdev_pad_config *cfg,
 263                struct v4l2_subdev_mbus_code_enum *code)
 264{
 265        if (code->pad || code->index >= ARRAY_SIZE(adv7170_codes))
 266                return -EINVAL;
 267
 268        code->code = adv7170_codes[code->index];
 269        return 0;
 270}
 271
 272static int adv7170_get_fmt(struct v4l2_subdev *sd,
 273                struct v4l2_subdev_pad_config *cfg,
 274                struct v4l2_subdev_format *format)
 275{
 276        struct v4l2_mbus_framefmt *mf = &format->format;
 277        u8 val = adv7170_read(sd, 0x7);
 278
 279        if (format->pad)
 280                return -EINVAL;
 281
 282        if ((val & 0x40) == (1 << 6))
 283                mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 284        else
 285                mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 286
 287        mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 288        mf->width       = 0;
 289        mf->height      = 0;
 290        mf->field       = V4L2_FIELD_ANY;
 291
 292        return 0;
 293}
 294
 295static int adv7170_set_fmt(struct v4l2_subdev *sd,
 296                struct v4l2_subdev_pad_config *cfg,
 297                struct v4l2_subdev_format *format)
 298{
 299        struct v4l2_mbus_framefmt *mf = &format->format;
 300        u8 val = adv7170_read(sd, 0x7);
 301
 302        if (format->pad)
 303                return -EINVAL;
 304
 305        switch (mf->code) {
 306        case MEDIA_BUS_FMT_UYVY8_2X8:
 307                val &= ~0x40;
 308                break;
 309
 310        case MEDIA_BUS_FMT_UYVY8_1X16:
 311                val |= 0x40;
 312                break;
 313
 314        default:
 315                v4l2_dbg(1, debug, sd,
 316                        "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 317                return -EINVAL;
 318        }
 319
 320        if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 321                return adv7170_write(sd, 0x7, val);
 322
 323        return 0;
 324}
 325
 326/* ----------------------------------------------------------------------- */
 327
 328static const struct v4l2_subdev_video_ops adv7170_video_ops = {
 329        .s_std_output = adv7170_s_std_output,
 330        .s_routing = adv7170_s_routing,
 331};
 332
 333static const struct v4l2_subdev_pad_ops adv7170_pad_ops = {
 334        .enum_mbus_code = adv7170_enum_mbus_code,
 335        .get_fmt = adv7170_get_fmt,
 336        .set_fmt = adv7170_set_fmt,
 337};
 338
 339static const struct v4l2_subdev_ops adv7170_ops = {
 340        .video = &adv7170_video_ops,
 341        .pad = &adv7170_pad_ops,
 342};
 343
 344/* ----------------------------------------------------------------------- */
 345
 346static int adv7170_probe(struct i2c_client *client,
 347                        const struct i2c_device_id *id)
 348{
 349        struct adv7170 *encoder;
 350        struct v4l2_subdev *sd;
 351        int i;
 352
 353        /* Check if the adapter supports the needed features */
 354        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 355                return -ENODEV;
 356
 357        v4l_info(client, "chip found @ 0x%x (%s)\n",
 358                        client->addr << 1, client->adapter->name);
 359
 360        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 361        if (encoder == NULL)
 362                return -ENOMEM;
 363        sd = &encoder->sd;
 364        v4l2_i2c_subdev_init(sd, client, &adv7170_ops);
 365        encoder->norm = V4L2_STD_NTSC;
 366        encoder->input = 0;
 367
 368        i = adv7170_write_block(sd, init_NTSC, sizeof(init_NTSC));
 369        if (i >= 0) {
 370                i = adv7170_write(sd, 0x07, TR0MODE | TR0RST);
 371                i = adv7170_write(sd, 0x07, TR0MODE);
 372                i = adv7170_read(sd, 0x12);
 373                v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 374        }
 375        if (i < 0)
 376                v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 377        return 0;
 378}
 379
 380static int adv7170_remove(struct i2c_client *client)
 381{
 382        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 383
 384        v4l2_device_unregister_subdev(sd);
 385        return 0;
 386}
 387
 388/* ----------------------------------------------------------------------- */
 389
 390static const struct i2c_device_id adv7170_id[] = {
 391        { "adv7170", 0 },
 392        { "adv7171", 0 },
 393        { }
 394};
 395MODULE_DEVICE_TABLE(i2c, adv7170_id);
 396
 397static struct i2c_driver adv7170_driver = {
 398        .driver = {
 399                .name   = "adv7170",
 400        },
 401        .probe          = adv7170_probe,
 402        .remove         = adv7170_remove,
 403        .id_table       = adv7170_id,
 404};
 405
 406module_i2c_driver(adv7170_driver);
 407