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 23 MODULE_DESCRIPTION("Philips SAA7185 video encoder driver"); 24 MODULE_AUTHOR("Dave Perks"); 25 MODULE_LICENSE("GPL"); 26 27 static int debug; 28 module_param(debug, int, 0); 29 MODULE_PARM_DESC(debug, "Debug level (0-1)"); 30 31 32 /* ----------------------------------------------------------------------- */ 33 34 struct saa7185 { 35 struct v4l2_subdev sd; 36 unsigned char reg[128]; 37 38 v4l2_std_id norm; 39 }; 40 41 static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd) 42 { 43 return container_of(sd, struct saa7185, sd); 44 } 45 46 /* ----------------------------------------------------------------------- */ 47 48 static 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 55 static 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 65 static 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 /* ----------------------------------------------------------------------- */ 108 109 static 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 }; 185 186 static 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 }; 195 196 static 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 }; 205 206 207 static 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 } 218 219 static 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 } 232 233 static 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 /* ----------------------------------------------------------------------- */ 275 276 static const struct v4l2_subdev_core_ops saa7185_core_ops = { 277 .init = saa7185_init, 278 }; 279 280 static const struct v4l2_subdev_video_ops saa7185_video_ops = { 281 .s_std_output = saa7185_s_std_output, 282 .s_routing = saa7185_s_routing, 283 }; 284 285 static const struct v4l2_subdev_ops saa7185_ops = { 286 .core = &saa7185_core_ops, 287 .video = &saa7185_video_ops, 288 }; 289 290 291 /* ----------------------------------------------------------------------- */ 292 293 static int saa7185_probe(struct i2c_client *client) 294 { 295 int i; 296 struct saa7185 *encoder; 297 struct v4l2_subdev *sd; 298 299 /* Check if the adapter supports the needed features */ 300 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) 301 return -ENODEV; 302 303 v4l_info(client, "chip found @ 0x%x (%s)\n", 304 client->addr << 1, client->adapter->name); 305 306 encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL); 307 if (encoder == NULL) 308 return -ENOMEM; 309 encoder->norm = V4L2_STD_NTSC; 310 sd = &encoder->sd; 311 v4l2_i2c_subdev_init(sd, client, &saa7185_ops); 312 313 i = saa7185_write_block(sd, init_common, sizeof(init_common)); 314 if (i >= 0) 315 i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc)); 316 if (i < 0) 317 v4l2_dbg(1, debug, sd, "init error %d\n", i); 318 else 319 v4l2_dbg(1, debug, sd, "revision 0x%x\n", 320 saa7185_read(sd) >> 5); 321 return 0; 322 } 323 324 static void saa7185_remove(struct i2c_client *client) 325 { 326 struct v4l2_subdev *sd = i2c_get_clientdata(client); 327 struct saa7185 *encoder = to_saa7185(sd); 328 329 v4l2_device_unregister_subdev(sd); 330 /* SW: output off is active */ 331 saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40); 332 } 333 334 /* ----------------------------------------------------------------------- */ 335 336 static const struct i2c_device_id saa7185_id[] = { 337 { "saa7185", 0 }, 338 { } 339 }; 340 MODULE_DEVICE_TABLE(i2c, saa7185_id); 341 342 static struct i2c_driver saa7185_driver = { 343 .driver = { 344 .name = "saa7185", 345 }, 346 .probe_new = saa7185_probe, 347 .remove = saa7185_remove, 348 .id_table = saa7185_id, 349 }; 350 351 module_i2c_driver(saa7185_driver); 352