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 #include <media/v4l2-chip-ident.h> 36 37 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); 38 MODULE_AUTHOR("Dave Perks"); 39 MODULE_LICENSE("GPL"); 40 41 static int debug; 42 module_param(debug, int, 0); 43 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 44 45 46 /* ----------------------------------------------------------------------- */ 47 48 struct saa7185 { 49 struct v4l2_subdev sd; 50 unsigned char reg[128]; 51 52 v4l2_std_id norm; 53 }; 54 55 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) 56 { 57 return container_of(sd, struct saa7185, sd); 58 } 59 60 /* ----------------------------------------------------------------------- */ 61 62 static inline int saa7185_read(struct v4l2_subdev *sd) 63 { 64 struct i2c_client *client = v4l2_get_subdevdata(sd); 65 66 return i2c_smbus_read_byte(client); 67 } 68 69 static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value) 70 { 71 struct i2c_client *client = v4l2_get_subdevdata(sd); 72 struct saa7185 *encoder = to_saa7185(sd); 73 74 v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value); 75 encoder->reg[reg] = value; 76 return i2c_smbus_write_byte_data(client, reg, value); 77 } 78 79 static int saa7185_write_block(struct v4l2_subdev *sd, 80 const u8 *data, unsigned int len) 81 { 82 struct i2c_client *client = v4l2_get_subdevdata(sd); 83 struct saa7185 *encoder = to_saa7185(sd); 84 int ret = -1; 85 u8 reg; 86 87 /* the adv7175 has an autoincrement function, use it if 88 * the adapter understands raw I2C */ 89 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 90 /* do raw I2C, not smbus compatible */ 91 u8 block_data[32]; 92 int block_len; 93 94 while (len >= 2) { 95 block_len = 0; 96 block_data[block_len++] = reg = data[0]; 97 do { 98 block_data[block_len++] = 99 encoder->reg[reg++] = data[1]; 100 len -= 2; 101 data += 2; 102 } while (len >= 2 && data[0] == reg && block_len < 32); 103 ret = i2c_master_send(client, block_data, block_len); 104 if (ret < 0) 105 break; 106 } 107 } else { 108 /* do some slow I2C emulation kind of thing */ 109 while (len >= 2) { 110 reg = *data++; 111 ret = saa7185_write(sd, reg, *data++); 112 if (ret < 0) 113 break; 114 len -= 2; 115 } 116 } 117 118 return ret; 119 } 120 121 /* ----------------------------------------------------------------------- */ 122 123 static const unsigned char init_common[] = { 124 0x3a, 0x0f, /* CBENB=0, V656=0, VY2C=1, 125 * YUV2C=1, MY2C=1, MUV2C=1 */ 126 127 0x42, 0x6b, /* OVLY0=107 */ 128 0x43, 0x00, /* OVLU0=0 white */ 129 0x44, 0x00, /* OVLV0=0 */ 130 0x45, 0x22, /* OVLY1=34 */ 131 0x46, 0xac, /* OVLU1=172 yellow */ 132 0x47, 0x0e, /* OVLV1=14 */ 133 0x48, 0x03, /* OVLY2=3 */ 134 0x49, 0x1d, /* OVLU2=29 cyan */ 135 0x4a, 0xac, /* OVLV2=172 */ 136 0x4b, 0xf0, /* OVLY3=240 */ 137 0x4c, 0xc8, /* OVLU3=200 green */ 138 0x4d, 0xb9, /* OVLV3=185 */ 139 0x4e, 0xd4, /* OVLY4=212 */ 140 0x4f, 0x38, /* OVLU4=56 magenta */ 141 0x50, 0x47, /* OVLV4=71 */ 142 0x51, 0xc1, /* OVLY5=193 */ 143 0x52, 0xe3, /* OVLU5=227 red */ 144 0x53, 0x54, /* OVLV5=84 */ 145 0x54, 0xa3, /* OVLY6=163 */ 146 0x55, 0x54, /* OVLU6=84 blue */ 147 0x56, 0xf2, /* OVLV6=242 */ 148 0x57, 0x90, /* OVLY7=144 */ 149 0x58, 0x00, /* OVLU7=0 black */ 150 0x59, 0x00, /* OVLV7=0 */ 151 152 0x5a, 0x00, /* CHPS=0 */ 153 0x5b, 0x76, /* GAINU=118 */ 154 0x5c, 0xa5, /* GAINV=165 */ 155 0x5d, 0x3c, /* BLCKL=60 */ 156 0x5e, 0x3a, /* BLNNL=58 */ 157 0x5f, 0x3a, /* CCRS=0, BLNVB=58 */ 158 0x60, 0x00, /* NULL */ 159 160 /* 0x61 - 0x66 set according to norm */ 161 162 0x67, 0x00, /* 0 : caption 1st byte odd field */ 163 0x68, 0x00, /* 0 : caption 2nd byte odd field */ 164 0x69, 0x00, /* 0 : caption 1st byte even field */ 165 0x6a, 0x00, /* 0 : caption 2nd byte even field */ 166 167 0x6b, 0x91, /* MODIN=2, PCREF=0, SCCLN=17 */ 168 0x6c, 0x20, /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0, 169 * CBLF=0, ORCV2=0, PRCV2=0 */ 170 0x6d, 0x00, /* SRCM1=0, CCEN=0 */ 171 172 0x6e, 0x0e, /* HTRIG=0x005, approx. centered, at 173 * least for PAL */ 174 0x6f, 0x00, /* HTRIG upper bits */ 175 0x70, 0x20, /* PHRES=0, SBLN=1, VTRIG=0 */ 176 177 /* The following should not be needed */ 178 179 0x71, 0x15, /* BMRQ=0x115 */ 180 0x72, 0x90, /* EMRQ=0x690 */ 181 0x73, 0x61, /* EMRQ=0x690, BMRQ=0x115 */ 182 0x74, 0x00, /* NULL */ 183 0x75, 0x00, /* NULL */ 184 0x76, 0x00, /* NULL */ 185 0x77, 0x15, /* BRCV=0x115 */ 186 0x78, 0x90, /* ERCV=0x690 */ 187 0x79, 0x61, /* ERCV=0x690, BRCV=0x115 */ 188 189 /* Field length controls */ 190 191 0x7a, 0x70, /* FLC=0 */ 192 193 /* The following should not be needed if SBLN = 1 */ 194 195 0x7b, 0x16, /* FAL=22 */ 196 0x7c, 0x35, /* LAL=244 */ 197 0x7d, 0x20, /* LAL=244, FAL=22 */ 198 }; 199 200 static const unsigned char init_pal[] = { 201 0x61, 0x1e, /* FISE=0, PAL=1, SCBW=1, RTCE=1, 202 * YGS=1, INPI=0, DOWN=0 */ 203 0x62, 0xc8, /* DECTYP=1, BSTA=72 */ 204 0x63, 0xcb, /* FSC0 */ 205 0x64, 0x8a, /* FSC1 */ 206 0x65, 0x09, /* FSC2 */ 207 0x66, 0x2a, /* FSC3 */ 208 }; 209 210 static const unsigned char init_ntsc[] = { 211 0x61, 0x1d, /* FISE=1, PAL=0, SCBW=1, RTCE=1, 212 * YGS=1, INPI=0, DOWN=0 */ 213 0x62, 0xe6, /* DECTYP=1, BSTA=102 */ 214 0x63, 0x1f, /* FSC0 */ 215 0x64, 0x7c, /* FSC1 */ 216 0x65, 0xf0, /* FSC2 */ 217 0x66, 0x21, /* FSC3 */ 218 }; 219 220 221 static int saa7185_init(struct v4l2_subdev *sd, u32 val) 222 { 223 struct saa7185 *encoder = to_saa7185(sd); 224 225 saa7185_write_block(sd, init_common, sizeof(init_common)); 226 if (encoder->norm & V4L2_STD_NTSC) 227 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 228 else 229 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 230 return 0; 231 } 232 233 static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std) 234 { 235 struct saa7185 *encoder = to_saa7185(sd); 236 237 if (std & V4L2_STD_NTSC) 238 saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 239 else if (std & V4L2_STD_PAL) 240 saa7185_write_block(sd, init_pal, sizeof(init_pal)); 241 else 242 return -EINVAL; 243 encoder->norm = std; 244 return 0; 245 } 246 247 static int saa7185_s_routing(struct v4l2_subdev *sd, 248 u32 input, u32 output, u32 config) 249 { 250 struct saa7185 *encoder = to_saa7185(sd); 251 252 /* RJ: input = 0: input is from SA7111 253 input = 1: input is from ZR36060 */ 254 255 switch (input) { 256 case 0: 257 /* turn off colorbar */ 258 saa7185_write(sd, 0x3a, 0x0f); 259 /* Switch RTCE to 1 */ 260 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 261 saa7185_write(sd, 0x6e, 0x01); 262 break; 263 264 case 1: 265 /* turn off colorbar */ 266 saa7185_write(sd, 0x3a, 0x0f); 267 /* Switch RTCE to 0 */ 268 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00); 269 /* SW: a slight sync problem... */ 270 saa7185_write(sd, 0x6e, 0x00); 271 break; 272 273 case 2: 274 /* turn on colorbar */ 275 saa7185_write(sd, 0x3a, 0x8f); 276 /* Switch RTCE to 0 */ 277 saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08); 278 /* SW: a slight sync problem... */ 279 saa7185_write(sd, 0x6e, 0x01); 280 break; 281 282 default: 283 return -EINVAL; 284 } 285 return 0; 286 } 287 288 static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) 289 { 290 struct i2c_client *client = v4l2_get_subdevdata(sd); 291 292 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0); 293 } 294 295 /* ----------------------------------------------------------------------- */ 296 297 static const struct v4l2_subdev_core_ops saa7185_core_ops = { 298 .g_chip_ident = saa7185_g_chip_ident, 299 .init = saa7185_init, 300 }; 301 302 static const struct v4l2_subdev_video_ops saa7185_video_ops = { 303 .s_std_output = saa7185_s_std_output, 304 .s_routing = saa7185_s_routing, 305 }; 306 307 static const struct v4l2_subdev_ops saa7185_ops = { 308 .core = &saa7185_core_ops, 309 .video = &saa7185_video_ops, 310 }; 311 312 313 /* ----------------------------------------------------------------------- */ 314 315 static int saa7185_probe(struct i2c_client *client, 316 const struct i2c_device_id *id) 317 { 318 int i; 319 struct saa7185 *encoder; 320 struct v4l2_subdev *sd; 321 322 /* Check if the adapter supports the needed features */ 323 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 324 return -ENODEV; 325 326 v4l_info(client, "chip found @ 0x%x (%s)\n", 327 client->addr << 1, client->adapter->name); 328 329 encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL); 330 if (encoder == NULL) 331 return -ENOMEM; 332 encoder->norm = V4L2_STD_NTSC; 333 sd = &encoder->sd; 334 v4l2_i2c_subdev_init(sd, client, &saa7185_ops); 335 336 i = saa7185_write_block(sd, init_common, sizeof(init_common)); 337 if (i >= 0) 338 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 339 if (i < 0) 340 v4l2_dbg(1, debug, sd, "init error %d\n", i); 341 else 342 v4l2_dbg(1, debug, sd, "revision 0x%x\n", 343 saa7185_read(sd) >> 5); 344 return 0; 345 } 346 347 static int saa7185_remove(struct i2c_client *client) 348 { 349 struct v4l2_subdev *sd = i2c_get_clientdata(client); 350 struct saa7185 *encoder = to_saa7185(sd); 351 352 v4l2_device_unregister_subdev(sd); 353 /* SW: output off is active */ 354 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40); 355 kfree(encoder); 356 return 0; 357 } 358 359 /* ----------------------------------------------------------------------- */ 360 361 static const struct i2c_device_id saa7185_id[] = { 362 { "saa7185", 0 }, 363 { } 364 }; 365 MODULE_DEVICE_TABLE(i2c, saa7185_id); 366 367 static struct i2c_driver saa7185_driver = { 368 .driver = { 369 .owner = THIS_MODULE, 370 .name = "saa7185", 371 }, 372 .probe = saa7185_probe, 373 .remove = saa7185_remove, 374 .id_table = saa7185_id, 375 }; 376 377 module_i2c_driver(saa7185_driver); 378