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 23 #include <linux/module.h> 24 #include <linux/types.h> 25 #include <linux/slab.h> 26 #include <linux/ioctl.h> 27 #include <linux/uaccess.h> 28 #include <linux/i2c.h> 29 #include <linux/videodev2.h> 30 #include <media/v4l2-device.h> 31 32 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); 33 MODULE_AUTHOR("Dave Perks"); 34 MODULE_LICENSE("GPL"); 35 36 static int debug; 37 module_param(debug, int, 0); 38 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 39 40 41 /* ----------------------------------------------------------------------- */ 42 43 struct saa7185 { 44 struct v4l2_subdev sd; 45 unsigned char reg[128]; 46 47 v4l2_std_id norm; 48 }; 49 50 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) 51 { 52 return container_of(sd, struct saa7185, sd); 53 } 54 55 /* ----------------------------------------------------------------------- */ 56 57 static inline int saa7185_read(struct v4l2_subdev *sd) 58 { 59 struct i2c_client *client = v4l2_get_subdevdata(sd); 60 61 return i2c_smbus_read_byte(client); 62 } 63 64 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value) 65 { 66 struct i2c_client *client = v4l2_get_subdevdata(sd); 67 struct saa7185 *encoder = to_saa7185(sd); 68 69 v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value); 70 encoder->reg[reg] = value; 71 return i2c_smbus_write_byte_data(client, reg, value); 72 } 73 74 static int saa7185_write_block(struct v4l2_subdev *sd, 75 const u8 *data, unsigned int len) 76 { 77 struct i2c_client *client = v4l2_get_subdevdata(sd); 78 struct saa7185 *encoder = to_saa7185(sd); 79 int ret = -1; 80 u8 reg; 81 82 /* the adv7175 has an autoincrement function, use it if 83 * the adapter understands raw I2C */ 84 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 85 /* do raw I2C, not smbus compatible */ 86 u8 block_data[32]; 87 int block_len; 88 89 while (len >= 2) { 90 block_len = 0; 91 block_data[block_len++] = reg = data[0]; 92 do { 93 block_data[block_len++] = 94 encoder->reg[reg++] = data[1]; 95 len -= 2; 96 data += 2; 97 } while (len >= 2 && data[0] == reg && block_len < 32); 98 ret = i2c_master_send(client, block_data, block_len); 99 if (ret < 0) 100 break; 101 } 102 } else { 103 /* do some slow I2C emulation kind of thing */ 104 while (len >= 2) { 105 reg = *data++; 106 ret = saa7185_write(sd, reg, *data++); 107 if (ret < 0) 108 break; 109 len -= 2; 110 } 111 } 112 113 return ret; 114 } 115 116 /* ----------------------------------------------------------------------- */ 117 118 static const unsigned char init_common[] = { 119 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, 120 * YUV2C=1, MY2C=1, MUV2C=1 */ 121 122 0x42, 0x6b, /* OVLY0=107 */ 123 0x43, 0x00, /* OVLU0=0 white */ 124 0x44, 0x00, /* OVLV0=0 */ 125 0x45, 0x22, /* OVLY1=34 */ 126 0x46, 0xac, /* OVLU1=172 yellow */ 127 0x47, 0x0e, /* OVLV1=14 */ 128 0x48, 0x03, /* OVLY2=3 */ 129 0x49, 0x1d, /* OVLU2=29 cyan */ 130 0x4a, 0xac, /* OVLV2=172 */ 131 0x4b, 0xf0, /* OVLY3=240 */ 132 0x4c, 0xc8, /* OVLU3=200 green */ 133 0x4d, 0xb9, /* OVLV3=185 */ 134 0x4e, 0xd4, /* OVLY4=212 */ 135 0x4f, 0x38, /* OVLU4=56 magenta */ 136 0x50, 0x47, /* OVLV4=71 */ 137 0x51, 0xc1, /* OVLY5=193 */ 138 0x52, 0xe3, /* OVLU5=227 red */ 139 0x53, 0x54, /* OVLV5=84 */ 140 0x54, 0xa3, /* OVLY6=163 */ 141 0x55, 0x54, /* OVLU6=84 blue */ 142 0x56, 0xf2, /* OVLV6=242 */ 143 0x57, 0x90, /* OVLY7=144 */ 144 0x58, 0x00, /* OVLU7=0 black */ 145 0x59, 0x00, /* OVLV7=0 */ 146 147 0x5a, 0x00, /* CHPS=0 */ 148 0x5b, 0x76, /* GAINU=118 */ 149 0x5c, 0xa5, /* GAINV=165 */ 150 0x5d, 0x3c, /* BLCKL=60 */ 151 0x5e, 0x3a, /* BLNNL=58 */ 152 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */ 153 0x60, 0x00, /* NULL */ 154 155 /* 0x61 - 0x66 set according to norm */ 156 157 0x67, 0x00, /* 0 : caption 1st byte odd field */ 158 0x68, 0x00, /* 0 : caption 2nd byte odd field */ 159 0x69, 0x00, /* 0 : caption 1st byte even field */ 160 0x6a, 0x00, /* 0 : caption 2nd byte even field */ 161 162 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */ 163 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, 164 * CBLF=0, ORCV2=0, PRCV2=0 */ 165 0x6d, 0x00, /* SRCM1=0, CCEN=0 */ 166 167 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at 168 * least for PAL */ 169 0x6f, 0x00, /* HTRIG upper bits */ 170 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */ 171 172 /* The following should not be needed */ 173 174 0x71, 0x15, /* BMRQ=0x115 */ 175 0x72, 0x90, /* EMRQ=0x690 */ 176 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */ 177 0x74, 0x00, /* NULL */ 178 0x75, 0x00, /* NULL */ 179 0x76, 0x00, /* NULL */ 180 0x77, 0x15, /* BRCV=0x115 */ 181 0x78, 0x90, /* ERCV=0x690 */ 182 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */ 183 184 /* Field length controls */ 185 186 0x7a, 0x70, /* FLC=0 */ 187 188 /* The following should not be needed if SBLN = 1 */ 189 190 0x7b, 0x16, /* FAL=22 */ 191 0x7c, 0x35, /* LAL=244 */ 192 0x7d, 0x20, /* LAL=244, FAL=22 */ 193 }; 194 195 static const unsigned char init_pal[] = { 196 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, 197 * YGS=1, INPI=0, DOWN=0 */ 198 0x62, 0xc8, /* DECTYP=1, BSTA=72 */ 199 0x63, 0xcb, /* FSC0 */ 200 0x64, 0x8a, /* FSC1 */ 201 0x65, 0x09, /* FSC2 */ 202 0x66, 0x2a, /* FSC3 */ 203 }; 204 205 static const unsigned char init_ntsc[] = { 206 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, 207 * YGS=1, INPI=0, DOWN=0 */ 208 0x62, 0xe6, /* DECTYP=1, BSTA=102 */ 209 0x63, 0x1f, /* FSC0 */ 210 0x64, 0x7c, /* FSC1 */ 211 0x65, 0xf0, /* FSC2 */ 212 0x66, 0x21, /* FSC3 */ 213 }; 214 215 216 static int saa7185_init(struct v4l2_subdev *sd, u32 val) 217 { 218 struct saa7185 *encoder = to_saa7185(sd); 219 220 saa7185_write_block(sd, init_common, sizeof(init_common)); 221 if (encoder->norm & V4L2_STD_NTSC) 222 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 223 else 224 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 225 return 0; 226 } 227 228 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 229 { 230 struct saa7185 *encoder = to_saa7185(sd); 231 232 if (std & V4L2_STD_NTSC) 233 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 234 else if (std & V4L2_STD_PAL) 235 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 236 else 237 return -EINVAL; 238 encoder->norm = std; 239 return 0; 240 } 241 242 static int saa7185_s_routing(struct v4l2_subdev *sd, 243 u32 input, u32 output, u32 config) 244 { 245 struct saa7185 *encoder = to_saa7185(sd); 246 247 /* RJ: input = 0: input is from SA7111 248 input = 1: input is from ZR36060 */ 249 250 switch (input) { 251 case 0: 252 /* turn off colorbar */ 253 saa7185_write(sd, 0x3a, 0x0f); 254 /* Switch RTCE to 1 */ 255 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 256 saa7185_write(sd, 0x6e, 0x01); 257 break; 258 259 case 1: 260 /* turn off colorbar */ 261 saa7185_write(sd, 0x3a, 0x0f); 262 /* Switch RTCE to 0 */ 263 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00); 264 /* SW: a slight sync problem... */ 265 saa7185_write(sd, 0x6e, 0x00); 266 break; 267 268 case 2: 269 /* turn on colorbar */ 270 saa7185_write(sd, 0x3a, 0x8f); 271 /* Switch RTCE to 0 */ 272 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 273 /* SW: a slight sync problem... */ 274 saa7185_write(sd, 0x6e, 0x01); 275 break; 276 277 default: 278 return -EINVAL; 279 } 280 return 0; 281 } 282 283 /* ----------------------------------------------------------------------- */ 284 285 static const struct v4l2_subdev_core_ops saa7185_core_ops = { 286 .init = saa7185_init, 287 }; 288 289 static const struct v4l2_subdev_video_ops saa7185_video_ops = { 290 .s_std_output = saa7185_s_std_output, 291 .s_routing = saa7185_s_routing, 292 }; 293 294 static const struct v4l2_subdev_ops saa7185_ops = { 295 .core = &saa7185_core_ops, 296 .video = &saa7185_video_ops, 297 }; 298 299 300 /* ----------------------------------------------------------------------- */ 301 302 static int saa7185_probe(struct i2c_client *client, 303 const struct i2c_device_id *id) 304 { 305 int i; 306 struct saa7185 *encoder; 307 struct v4l2_subdev *sd; 308 309 /* Check if the adapter supports the needed features */ 310 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 311 return -ENODEV; 312 313 v4l_info(client, "chip found @ 0x%x (%s)\n", 314 client->addr << 1, client->adapter->name); 315 316 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 317 if (encoder == NULL) 318 return -ENOMEM; 319 encoder->norm = V4L2_STD_NTSC; 320 sd = &encoder->sd; 321 v4l2_i2c_subdev_init(sd, client, &saa7185_ops); 322 323 i = saa7185_write_block(sd, init_common, sizeof(init_common)); 324 if (i >= 0) 325 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 326 if (i < 0) 327 v4l2_dbg(1, debug, sd, "init error %d\n", i); 328 else 329 v4l2_dbg(1, debug, sd, "revision 0x%x\n", 330 saa7185_read(sd) >> 5); 331 return 0; 332 } 333 334 static int saa7185_remove(struct i2c_client *client) 335 { 336 struct v4l2_subdev *sd = i2c_get_clientdata(client); 337 struct saa7185 *encoder = to_saa7185(sd); 338 339 v4l2_device_unregister_subdev(sd); 340 /* SW: output off is active */ 341 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40); 342 return 0; 343 } 344 345 /* ----------------------------------------------------------------------- */ 346 347 static const struct i2c_device_id saa7185_id[] = { 348 { "saa7185", 0 }, 349 { } 350 }; 351 MODULE_DEVICE_TABLE(i2c, saa7185_id); 352 353 static struct i2c_driver saa7185_driver = { 354 .driver = { 355 .name = "saa7185", 356 }, 357 .probe = saa7185_probe, 358 .remove = saa7185_remove, 359 .id_table = saa7185_id, 360 }; 361 362 module_i2c_driver(saa7185_driver); 363