LXR linux/drivers/media/i2c/saa7185.c

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
   4 *
   5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   6 *
   7 * Slight changes for video timing and attachment output by
   8 * Wolfgang Scherr <scherr@net4you.net>
   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
  14#include <linux/module.h>
  15#include <linux/types.h>
  16#include <linux/slab.h>
  17#include <linux/ioctl.h>
  18#include <linux/uaccess.h>
  19#include <linux/i2c.h>
  20#include <linux/videodev2.h>
  21#include <media/v4l2-device.h>
  22
  23MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  24MODULE_AUTHOR("Dave Perks");
  25MODULE_LICENSE("GPL");
  26
  27static int debug;
  28module_param(debug, int, 0);
  29MODULE_PARM_DESC(debug, "Debug level (0-1)");
  30
  31
  32/* ----------------------------------------------------------------------- */
  33
  34struct saa7185 {
  35        struct v4l2_subdev sd;
  36        unsigned char reg[128];
  37
  38        v4l2_std_id norm;
  39};
  40
  41static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  42{
  43        return container_of(sd, struct saa7185, sd);
  44}
  45
  46/* ----------------------------------------------------------------------- */
  47
  48static inline int saa7185_read(struct v4l2_subdev *sd)
  49{
  50        struct i2c_client *client = v4l2_get_subdevdata(sd);
  51
  52        return i2c_smbus_read_byte(client);
  53}
  54
  55static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  56{
  57        struct i2c_client *client = v4l2_get_subdevdata(sd);
  58        struct saa7185 *encoder = to_saa7185(sd);
  59
  60        v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  61        encoder->reg[reg] = value;
  62        return i2c_smbus_write_byte_data(client, reg, value);
  63}
  64
  65static int saa7185_write_block(struct v4l2_subdev *sd,
  66                const u8 *data, unsigned int len)
  67{
  68        struct i2c_client *client = v4l2_get_subdevdata(sd);
  69        struct saa7185 *encoder = to_saa7185(sd);
  70        int ret = -1;
  71        u8 reg;
  72
  73        /* the adv7175 has an autoincrement function, use it if
  74         * the adapter understands raw I2C */
  75        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  76                /* do raw I2C, not smbus compatible */
  77                u8 block_data[32];
  78                int block_len;
  79
  80                while (len >= 2) {
  81                        block_len = 0;
  82                        block_data[block_len++] = reg = data[0];
  83                        do {
  84                                block_data[block_len++] =
  85                                    encoder->reg[reg++] = data[1];
  86                                len -= 2;
  87                                data += 2;
  88                        } while (len >= 2 && data[0] == reg && block_len < 32);
  89                        ret = i2c_master_send(client, block_data, block_len);
  90                        if (ret < 0)
  91                                break;
  92                }
  93        } else {
  94                /* do some slow I2C emulation kind of thing */
  95                while (len >= 2) {
  96                        reg = *data++;
  97                        ret = saa7185_write(sd, reg, *data++);
  98                        if (ret < 0)
  99                                break;
 100                        len -= 2;
 101                }
 102        }
 103
 104        return ret;
 105}
 106
 107/* ----------------------------------------------------------------------- */
 108
 109static const unsigned char init_common[] = {
 110        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 111                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 112
 113        0x42, 0x6b,             /* OVLY0=107 */
 114        0x43, 0x00,             /* OVLU0=0     white */
 115        0x44, 0x00,             /* OVLV0=0   */
 116        0x45, 0x22,             /* OVLY1=34  */
 117        0x46, 0xac,             /* OVLU1=172   yellow */
 118        0x47, 0x0e,             /* OVLV1=14  */
 119        0x48, 0x03,             /* OVLY2=3   */
 120        0x49, 0x1d,             /* OVLU2=29    cyan */
 121        0x4a, 0xac,             /* OVLV2=172 */
 122        0x4b, 0xf0,             /* OVLY3=240 */
 123        0x4c, 0xc8,             /* OVLU3=200   green */
 124        0x4d, 0xb9,             /* OVLV3=185 */
 125        0x4e, 0xd4,             /* OVLY4=212 */
 126        0x4f, 0x38,             /* OVLU4=56    magenta */
 127        0x50, 0x47,             /* OVLV4=71  */
 128        0x51, 0xc1,             /* OVLY5=193 */
 129        0x52, 0xe3,             /* OVLU5=227   red */
 130        0x53, 0x54,             /* OVLV5=84  */
 131        0x54, 0xa3,             /* OVLY6=163 */
 132        0x55, 0x54,             /* OVLU6=84    blue */
 133        0x56, 0xf2,             /* OVLV6=242 */
 134        0x57, 0x90,             /* OVLY7=144 */
 135        0x58, 0x00,             /* OVLU7=0     black */
 136        0x59, 0x00,             /* OVLV7=0   */
 137
 138        0x5a, 0x00,             /* CHPS=0    */
 139        0x5b, 0x76,             /* GAINU=118 */
 140        0x5c, 0xa5,             /* GAINV=165 */
 141        0x5d, 0x3c,             /* BLCKL=60  */
 142        0x5e, 0x3a,             /* BLNNL=58  */
 143        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 144        0x60, 0x00,             /* NULL      */
 145
 146        /* 0x61 - 0x66 set according to norm */
 147
 148        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 149        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 150        0x69, 0x00,             /* 0 : caption 1st byte even field */
 151        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 152
 153        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 154        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 155                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 156        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 157
 158        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 159                                 * least for PAL */
 160        0x6f, 0x00,             /* HTRIG upper bits */
 161        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 162
 163        /* The following should not be needed */
 164
 165        0x71, 0x15,             /* BMRQ=0x115 */
 166        0x72, 0x90,             /* EMRQ=0x690 */
 167        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 168        0x74, 0x00,             /* NULL       */
 169        0x75, 0x00,             /* NULL       */
 170        0x76, 0x00,             /* NULL       */
 171        0x77, 0x15,             /* BRCV=0x115 */
 172        0x78, 0x90,             /* ERCV=0x690 */
 173        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 174
 175        /* Field length controls */
 176
 177        0x7a, 0x70,             /* FLC=0 */
 178
 179        /* The following should not be needed if SBLN = 1 */
 180
 181        0x7b, 0x16,             /* FAL=22 */
 182        0x7c, 0x35,             /* LAL=244 */
 183        0x7d, 0x20,             /* LAL=244, FAL=22 */
 184};
 185
 186static const unsigned char init_pal[] = {
 187        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 188                                 * YGS=1, INPI=0, DOWN=0 */
 189        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 190        0x63, 0xcb,             /* FSC0 */
 191        0x64, 0x8a,             /* FSC1 */
 192        0x65, 0x09,             /* FSC2 */
 193        0x66, 0x2a,             /* FSC3 */
 194};
 195
 196static const unsigned char init_ntsc[] = {
 197        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 198                                 * YGS=1, INPI=0, DOWN=0 */
 199        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 200        0x63, 0x1f,             /* FSC0 */
 201        0x64, 0x7c,             /* FSC1 */
 202        0x65, 0xf0,             /* FSC2 */
 203        0x66, 0x21,             /* FSC3 */
 204};
 205
 206
 207static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 208{
 209        struct saa7185 *encoder = to_saa7185(sd);
 210
 211        saa7185_write_block(sd, init_common, sizeof(init_common));
 212        if (encoder->norm & V4L2_STD_NTSC)
 213                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 214        else
 215                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 216        return 0;
 217}
 218
 219static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 220{
 221        struct saa7185 *encoder = to_saa7185(sd);
 222
 223        if (std & V4L2_STD_NTSC)
 224                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 225        else if (std & V4L2_STD_PAL)
 226                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 227        else
 228                return -EINVAL;
 229        encoder->norm = std;
 230        return 0;
 231}
 232
 233static int saa7185_s_routing(struct v4l2_subdev *sd,
 234                             u32 input, u32 output, u32 config)
 235{
 236        struct saa7185 *encoder = to_saa7185(sd);
 237
 238        /* RJ: input = 0: input is from SA7111
 239         input = 1: input is from ZR36060 */
 240
 241        switch (input) {
 242        case 0:
 243                /* turn off colorbar */
 244                saa7185_write(sd, 0x3a, 0x0f);
 245                /* Switch RTCE to 1 */
 246                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 247                saa7185_write(sd, 0x6e, 0x01);
 248                break;
 249
 250        case 1:
 251                /* turn off colorbar */
 252                saa7185_write(sd, 0x3a, 0x0f);
 253                /* Switch RTCE to 0 */
 254                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 255                /* SW: a slight sync problem... */
 256                saa7185_write(sd, 0x6e, 0x00);
 257                break;
 258
 259        case 2:
 260                /* turn on colorbar */
 261                saa7185_write(sd, 0x3a, 0x8f);
 262                /* Switch RTCE to 0 */
 263                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 264                /* SW: a slight sync problem... */
 265                saa7185_write(sd, 0x6e, 0x01);
 266                break;
 267
 268        default:
 269                return -EINVAL;
 270        }
 271        return 0;
 272}
 273
 274/* ----------------------------------------------------------------------- */
 275
 276static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 277        .init = saa7185_init,
 278};
 279
 280static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 281        .s_std_output = saa7185_s_std_output,
 282        .s_routing = saa7185_s_routing,
 283};
 284
 285static const struct v4l2_subdev_ops saa7185_ops = {
 286        .core = &saa7185_core_ops,
 287        .video = &saa7185_video_ops,
 288};
 289
 290
 291/* ----------------------------------------------------------------------- */
 292
 293static int saa7185_probe(struct i2c_client *client,
 294                        const struct i2c_device_id *id)
 295{
 296        int i;
 297        struct saa7185 *encoder;
 298        struct v4l2_subdev *sd;
 299
 300        /* Check if the adapter supports the needed features */
 301        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 302                return -ENODEV;
 303
 304        v4l_info(client, "chip found @ 0x%x (%s)\n",
 305                        client->addr << 1, client->adapter->name);
 306
 307        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 308        if (encoder == NULL)
 309                return -ENOMEM;
 310        encoder->norm = V4L2_STD_NTSC;
 311        sd = &encoder->sd;
 312        v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 313
 314        i = saa7185_write_block(sd, init_common, sizeof(init_common));
 315        if (i >= 0)
 316                i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 317        if (i < 0)
 318                v4l2_dbg(1, debug, sd, "init error %d\n", i);
 319        else
 320                v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 321                                saa7185_read(sd) >> 5);
 322        return 0;
 323}
 324
 325static int saa7185_remove(struct i2c_client *client)
 326{
 327        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 328        struct saa7185 *encoder = to_saa7185(sd);
 329
 330        v4l2_device_unregister_subdev(sd);
 331        /* SW: output off is active */
 332        saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 333        return 0;
 334}
 335
 336/* ----------------------------------------------------------------------- */
 337
 338static const struct i2c_device_id saa7185_id[] = {
 339        { "saa7185", 0 },
 340        { }
 341};
 342MODULE_DEVICE_TABLE(i2c, saa7185_id);
 343
 344static struct i2c_driver saa7185_driver = {
 345        .driver = {
 346                .name   = "saa7185",
 347        },
 348        .probe          = saa7185_probe,
 349        .remove         = saa7185_remove,
 350        .id_table       = saa7185_id,
 351};
 352
 353module_i2c_driver(saa7185_driver);
 354