1 /* 2 * saa7185 - Philips SAA7185B video encoder driver version 0.0.3 3 * 4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net> 5 * 6 * Slight changes for video timing and attachment output by 7 * Wolfgang Scherr <scherr@net4you.net> 8 * 9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net> 10 * - moved over to linux>=2.4.x i2c protocol (1/1/2003) 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 25 */ 26 27 #include <linux/module.h> 28 #include <linux/types.h> 29 #include <linux/slab.h> 30 #include <linux/ioctl.h> 31 #include <asm/uaccess.h> 32 #include <linux/i2c.h> 33 #include <linux/videodev2.h> 34 #include <media/v4l2-device.h> 35 36 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); 37 MODULE_AUTHOR("Dave Perks"); 38 MODULE_LICENSE("GPL"); 39 40 static int debug; 41 module_param(debug, int, 0); 42 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 43 44 45 /* ----------------------------------------------------------------------- */ 46 47 struct saa7185 { 48 struct v4l2_subdev sd; 49 unsigned char reg[128]; 50 51 v4l2_std_id norm; 52 }; 53 54 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) 55 { 56 return container_of(sd, struct saa7185, sd); 57 } 58 59 /* ----------------------------------------------------------------------- */ 60 61 static inline int saa7185_read(struct v4l2_subdev *sd) 62 { 63 struct i2c_client *client = v4l2_get_subdevdata(sd); 64 65 return i2c_smbus_read_byte(client); 66 } 67 68 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value) 69 { 70 struct i2c_client *client = v4l2_get_subdevdata(sd); 71 struct saa7185 *encoder = to_saa7185(sd); 72 73 v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value); 74 encoder->reg[reg] = value; 75 return i2c_smbus_write_byte_data(client, reg, value); 76 } 77 78 static int saa7185_write_block(struct v4l2_subdev *sd, 79 const u8 *data, unsigned int len) 80 { 81 struct i2c_client *client = v4l2_get_subdevdata(sd); 82 struct saa7185 *encoder = to_saa7185(sd); 83 int ret = -1; 84 u8 reg; 85 86 /* the adv7175 has an autoincrement function, use it if 87 * the adapter understands raw I2C */ 88 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 89 /* do raw I2C, not smbus compatible */ 90 u8 block_data[32]; 91 int block_len; 92 93 while (len >= 2) { 94 block_len = 0; 95 block_data[block_len++] = reg = data[0]; 96 do { 97 block_data[block_len++] = 98 encoder->reg[reg++] = data[1]; 99 len -= 2; 100 data += 2; 101 } while (len >= 2 && data[0] == reg && block_len < 32); 102 ret = i2c_master_send(client, block_data, block_len); 103 if (ret < 0) 104 break; 105 } 106 } else { 107 /* do some slow I2C emulation kind of thing */ 108 while (len >= 2) { 109 reg = *data++; 110 ret = saa7185_write(sd, reg, *data++); 111 if (ret < 0) 112 break; 113 len -= 2; 114 } 115 } 116 117 return ret; 118 } 119 120 /* ----------------------------------------------------------------------- */ 121 122 static const unsigned char init_common[] = { 123 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, 124 * YUV2C=1, MY2C=1, MUV2C=1 */ 125 126 0x42, 0x6b, /* OVLY0=107 */ 127 0x43, 0x00, /* OVLU0=0 white */ 128 0x44, 0x00, /* OVLV0=0 */ 129 0x45, 0x22, /* OVLY1=34 */ 130 0x46, 0xac, /* OVLU1=172 yellow */ 131 0x47, 0x0e, /* OVLV1=14 */ 132 0x48, 0x03, /* OVLY2=3 */ 133 0x49, 0x1d, /* OVLU2=29 cyan */ 134 0x4a, 0xac, /* OVLV2=172 */ 135 0x4b, 0xf0, /* OVLY3=240 */ 136 0x4c, 0xc8, /* OVLU3=200 green */ 137 0x4d, 0xb9, /* OVLV3=185 */ 138 0x4e, 0xd4, /* OVLY4=212 */ 139 0x4f, 0x38, /* OVLU4=56 magenta */ 140 0x50, 0x47, /* OVLV4=71 */ 141 0x51, 0xc1, /* OVLY5=193 */ 142 0x52, 0xe3, /* OVLU5=227 red */ 143 0x53, 0x54, /* OVLV5=84 */ 144 0x54, 0xa3, /* OVLY6=163 */ 145 0x55, 0x54, /* OVLU6=84 blue */ 146 0x56, 0xf2, /* OVLV6=242 */ 147 0x57, 0x90, /* OVLY7=144 */ 148 0x58, 0x00, /* OVLU7=0 black */ 149 0x59, 0x00, /* OVLV7=0 */ 150 151 0x5a, 0x00, /* CHPS=0 */ 152 0x5b, 0x76, /* GAINU=118 */ 153 0x5c, 0xa5, /* GAINV=165 */ 154 0x5d, 0x3c, /* BLCKL=60 */ 155 0x5e, 0x3a, /* BLNNL=58 */ 156 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */ 157 0x60, 0x00, /* NULL */ 158 159 /* 0x61 - 0x66 set according to norm */ 160 161 0x67, 0x00, /* 0 : caption 1st byte odd field */ 162 0x68, 0x00, /* 0 : caption 2nd byte odd field */ 163 0x69, 0x00, /* 0 : caption 1st byte even field */ 164 0x6a, 0x00, /* 0 : caption 2nd byte even field */ 165 166 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */ 167 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, 168 * CBLF=0, ORCV2=0, PRCV2=0 */ 169 0x6d, 0x00, /* SRCM1=0, CCEN=0 */ 170 171 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at 172 * least for PAL */ 173 0x6f, 0x00, /* HTRIG upper bits */ 174 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */ 175 176 /* The following should not be needed */ 177 178 0x71, 0x15, /* BMRQ=0x115 */ 179 0x72, 0x90, /* EMRQ=0x690 */ 180 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */ 181 0x74, 0x00, /* NULL */ 182 0x75, 0x00, /* NULL */ 183 0x76, 0x00, /* NULL */ 184 0x77, 0x15, /* BRCV=0x115 */ 185 0x78, 0x90, /* ERCV=0x690 */ 186 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */ 187 188 /* Field length controls */ 189 190 0x7a, 0x70, /* FLC=0 */ 191 192 /* The following should not be needed if SBLN = 1 */ 193 194 0x7b, 0x16, /* FAL=22 */ 195 0x7c, 0x35, /* LAL=244 */ 196 0x7d, 0x20, /* LAL=244, FAL=22 */ 197 }; 198 199 static const unsigned char init_pal[] = { 200 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, 201 * YGS=1, INPI=0, DOWN=0 */ 202 0x62, 0xc8, /* DECTYP=1, BSTA=72 */ 203 0x63, 0xcb, /* FSC0 */ 204 0x64, 0x8a, /* FSC1 */ 205 0x65, 0x09, /* FSC2 */ 206 0x66, 0x2a, /* FSC3 */ 207 }; 208 209 static const unsigned char init_ntsc[] = { 210 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, 211 * YGS=1, INPI=0, DOWN=0 */ 212 0x62, 0xe6, /* DECTYP=1, BSTA=102 */ 213 0x63, 0x1f, /* FSC0 */ 214 0x64, 0x7c, /* FSC1 */ 215 0x65, 0xf0, /* FSC2 */ 216 0x66, 0x21, /* FSC3 */ 217 }; 218 219 220 static int saa7185_init(struct v4l2_subdev *sd, u32 val) 221 { 222 struct saa7185 *encoder = to_saa7185(sd); 223 224 saa7185_write_block(sd, init_common, sizeof(init_common)); 225 if (encoder->norm & V4L2_STD_NTSC) 226 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 227 else 228 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 229 return 0; 230 } 231 232 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 233 { 234 struct saa7185 *encoder = to_saa7185(sd); 235 236 if (std & V4L2_STD_NTSC) 237 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 238 else if (std & V4L2_STD_PAL) 239 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 240 else 241 return -EINVAL; 242 encoder->norm = std; 243 return 0; 244 } 245 246 static int saa7185_s_routing(struct v4l2_subdev *sd, 247 u32 input, u32 output, u32 config) 248 { 249 struct saa7185 *encoder = to_saa7185(sd); 250 251 /* RJ: input = 0: input is from SA7111 252 input = 1: input is from ZR36060 */ 253 254 switch (input) { 255 case 0: 256 /* turn off colorbar */ 257 saa7185_write(sd, 0x3a, 0x0f); 258 /* Switch RTCE to 1 */ 259 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 260 saa7185_write(sd, 0x6e, 0x01); 261 break; 262 263 case 1: 264 /* turn off colorbar */ 265 saa7185_write(sd, 0x3a, 0x0f); 266 /* Switch RTCE to 0 */ 267 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00); 268 /* SW: a slight sync problem... */ 269 saa7185_write(sd, 0x6e, 0x00); 270 break; 271 272 case 2: 273 /* turn on colorbar */ 274 saa7185_write(sd, 0x3a, 0x8f); 275 /* Switch RTCE to 0 */ 276 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 277 /* SW: a slight sync problem... */ 278 saa7185_write(sd, 0x6e, 0x01); 279 break; 280 281 default: 282 return -EINVAL; 283 } 284 return 0; 285 } 286 287 /* ----------------------------------------------------------------------- */ 288 289 static const struct v4l2_subdev_core_ops saa7185_core_ops = { 290 .init = saa7185_init, 291 }; 292 293 static const struct v4l2_subdev_video_ops saa7185_video_ops = { 294 .s_std_output = saa7185_s_std_output, 295 .s_routing = saa7185_s_routing, 296 }; 297 298 static const struct v4l2_subdev_ops saa7185_ops = { 299 .core = &saa7185_core_ops, 300 .video = &saa7185_video_ops, 301 }; 302 303 304 /* ----------------------------------------------------------------------- */ 305 306 static int saa7185_probe(struct i2c_client *client, 307 const struct i2c_device_id *id) 308 { 309 int i; 310 struct saa7185 *encoder; 311 struct v4l2_subdev *sd; 312 313 /* Check if the adapter supports the needed features */ 314 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 315 return -ENODEV; 316 317 v4l_info(client, "chip found @ 0x%x (%s)\n", 318 client->addr << 1, client->adapter->name); 319 320 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 321 if (encoder == NULL) 322 return -ENOMEM; 323 encoder->norm = V4L2_STD_NTSC; 324 sd = &encoder->sd; 325 v4l2_i2c_subdev_init(sd, client, &saa7185_ops); 326 327 i = saa7185_write_block(sd, init_common, sizeof(init_common)); 328 if (i >= 0) 329 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 330 if (i < 0) 331 v4l2_dbg(1, debug, sd, "init error %d\n", i); 332 else 333 v4l2_dbg(1, debug, sd, "revision 0x%x\n", 334 saa7185_read(sd) >> 5); 335 return 0; 336 } 337 338 static int saa7185_remove(struct i2c_client *client) 339 { 340 struct v4l2_subdev *sd = i2c_get_clientdata(client); 341 struct saa7185 *encoder = to_saa7185(sd); 342 343 v4l2_device_unregister_subdev(sd); 344 /* SW: output off is active */ 345 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40); 346 return 0; 347 } 348 349 /* ----------------------------------------------------------------------- */ 350 351 static const struct i2c_device_id saa7185_id[] = { 352 { "saa7185", 0 }, 353 { } 354 }; 355 MODULE_DEVICE_TABLE(i2c, saa7185_id); 356 357 static struct i2c_driver saa7185_driver = { 358 .driver = { 359 .owner = THIS_MODULE, 360 .name = "saa7185", 361 }, 362 .probe = saa7185_probe, 363 .remove = saa7185_remove, 364 .id_table = saa7185_id, 365 }; 366 367 module_i2c_driver(saa7185_driver); 368