Ralf Baechle | d203a7e | 2005-09-06 15:19:37 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * saa7191.c - Philips SAA7191 video decoder driver |
| 3 | * |
| 4 | * Copyright (C) 2003 Ladislav Michl <ladis@linux-mips.org> |
| 5 | * Copyright (C) 2004,2005 Mikael Nousiainen <tmnousia@cc.hut.fi> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/delay.h> |
| 15 | #include <linux/errno.h> |
| 16 | #include <linux/fs.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/major.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/mm.h> |
| 21 | #include <linux/sched.h> |
| 22 | |
| 23 | #include <linux/videodev.h> |
| 24 | #include <linux/video_decoder.h> |
| 25 | #include <linux/i2c.h> |
| 26 | |
| 27 | #include "saa7191.h" |
| 28 | |
| 29 | #define SAA7191_MODULE_VERSION "0.0.3" |
| 30 | |
| 31 | MODULE_DESCRIPTION("Philips SAA7191 video decoder driver"); |
| 32 | MODULE_VERSION(SAA7191_MODULE_VERSION); |
| 33 | MODULE_AUTHOR("Mikael Nousiainen <tmnousia@cc.hut.fi>"); |
| 34 | MODULE_LICENSE("GPL"); |
| 35 | |
| 36 | #define VINO_ADAPTER (I2C_ALGO_SGI | I2C_HW_SGI_VINO) |
| 37 | |
| 38 | struct saa7191 { |
| 39 | struct i2c_client *client; |
| 40 | |
| 41 | /* the register values are stored here as the actual |
| 42 | * I2C-registers are write-only */ |
| 43 | unsigned char reg[25]; |
| 44 | |
| 45 | unsigned char norm; |
| 46 | unsigned char input; |
| 47 | }; |
| 48 | |
| 49 | static struct i2c_driver i2c_driver_saa7191; |
| 50 | |
| 51 | static const unsigned char initseq[] = { |
| 52 | 0, /* Subaddress */ |
| 53 | 0x50, /* SAA7191_REG_IDEL */ |
| 54 | 0x30, /* SAA7191_REG_HSYB */ |
| 55 | 0x00, /* SAA7191_REG_HSYS */ |
| 56 | 0xe8, /* SAA7191_REG_HCLB */ |
| 57 | 0xb6, /* SAA7191_REG_HCLS */ |
| 58 | 0xf4, /* SAA7191_REG_HPHI */ |
| 59 | 0x01, /* SAA7191_REG_LUMA - chrominance trap active (CVBS) */ |
| 60 | 0x00, /* SAA7191_REG_HUEC */ |
| 61 | 0xf8, /* SAA7191_REG_CKTQ */ |
| 62 | 0xf8, /* SAA7191_REG_CKTS */ |
| 63 | 0x90, /* SAA7191_REG_PLSE */ |
| 64 | 0x90, /* SAA7191_REG_SESE */ |
| 65 | 0x00, /* SAA7191_REG_GAIN */ |
| 66 | 0x0c, /* SAA7191_REG_STDC - not SECAM, slow time constant */ |
| 67 | 0x78, /* SAA7191_REG_IOCK - chrominance from CVBS, GPSW1 & 2 off */ |
| 68 | 0x99, /* SAA7191_REG_CTL3 - automatic field detection */ |
| 69 | 0x00, /* SAA7191_REG_CTL4 */ |
| 70 | 0x2c, /* SAA7191_REG_CHCV */ |
| 71 | 0x00, /* unused */ |
| 72 | 0x00, /* unused */ |
| 73 | 0x34, /* SAA7191_REG_HS6B */ |
| 74 | 0x0a, /* SAA7191_REG_HS6S */ |
| 75 | 0xf4, /* SAA7191_REG_HC6B */ |
| 76 | 0xce, /* SAA7191_REG_HC6S */ |
| 77 | 0xf4, /* SAA7191_REG_HP6I */ |
| 78 | }; |
| 79 | |
| 80 | /* SAA7191 register handling */ |
| 81 | |
| 82 | static unsigned char saa7191_read_reg(struct i2c_client *client, |
| 83 | unsigned char reg) |
| 84 | { |
| 85 | return ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg]; |
| 86 | } |
| 87 | |
| 88 | static int saa7191_read_status(struct i2c_client *client, |
| 89 | unsigned char *value) |
| 90 | { |
| 91 | int ret; |
| 92 | |
| 93 | ret = i2c_master_recv(client, value, 1); |
| 94 | if (ret < 0) { |
| 95 | printk(KERN_ERR "SAA7191: saa7191_read_status(): read failed"); |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | return 0; |
| 100 | } |
| 101 | |
| 102 | |
| 103 | static int saa7191_write_reg(struct i2c_client *client, unsigned char reg, |
| 104 | unsigned char value) |
| 105 | { |
| 106 | |
| 107 | ((struct saa7191 *)i2c_get_clientdata(client))->reg[reg] = value; |
| 108 | return i2c_smbus_write_byte_data(client, reg, value); |
| 109 | } |
| 110 | |
| 111 | /* the first byte of data must be the first subaddress number (register) */ |
| 112 | static int saa7191_write_block(struct i2c_client *client, |
| 113 | unsigned char length, unsigned char *data) |
| 114 | { |
| 115 | int i; |
| 116 | int ret; |
| 117 | |
| 118 | struct saa7191 *decoder = (struct saa7191 *)i2c_get_clientdata(client); |
| 119 | for (i = 0; i < (length - 1); i++) { |
| 120 | decoder->reg[data[0] + i] = data[i + 1]; |
| 121 | } |
| 122 | |
| 123 | ret = i2c_master_send(client, data, length); |
| 124 | if (ret < 0) { |
| 125 | printk(KERN_ERR "SAA7191: saa7191_write_block(): " |
| 126 | "write failed"); |
| 127 | return ret; |
| 128 | } |
| 129 | |
| 130 | return 0; |
| 131 | } |
| 132 | |
| 133 | /* Helper functions */ |
| 134 | |
| 135 | static int saa7191_set_input(struct i2c_client *client, int input) |
| 136 | { |
| 137 | unsigned char luma = saa7191_read_reg(client, SAA7191_REG_LUMA); |
| 138 | unsigned char iock = saa7191_read_reg(client, SAA7191_REG_IOCK); |
| 139 | int err; |
| 140 | |
| 141 | switch (input) { |
| 142 | case SAA7191_INPUT_COMPOSITE: /* Set Composite input */ |
| 143 | iock &= ~(SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW1 |
| 144 | | SAA7191_IOCK_GPSW2); |
| 145 | /* Chrominance trap active */ |
| 146 | luma &= ~SAA7191_LUMA_BYPS; |
| 147 | break; |
| 148 | case SAA7191_INPUT_SVIDEO: /* Set S-Video input */ |
| 149 | iock |= SAA7191_IOCK_CHRS | SAA7191_IOCK_GPSW2; |
| 150 | /* Chrominance trap bypassed */ |
| 151 | luma |= SAA7191_LUMA_BYPS; |
| 152 | break; |
| 153 | default: |
| 154 | return -EINVAL; |
| 155 | } |
| 156 | |
| 157 | err = saa7191_write_reg(client, SAA7191_REG_LUMA, luma); |
| 158 | if (err) |
| 159 | return -EIO; |
| 160 | err = saa7191_write_reg(client, SAA7191_REG_IOCK, iock); |
| 161 | if (err) |
| 162 | return -EIO; |
| 163 | |
| 164 | return 0; |
| 165 | } |
| 166 | |
| 167 | static int saa7191_set_norm(struct i2c_client *client, int norm) |
| 168 | { |
| 169 | struct saa7191 *decoder = i2c_get_clientdata(client); |
| 170 | unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC); |
| 171 | unsigned char ctl3 = saa7191_read_reg(client, SAA7191_REG_CTL3); |
| 172 | unsigned char chcv = saa7191_read_reg(client, SAA7191_REG_CHCV); |
| 173 | int err; |
| 174 | |
| 175 | switch(norm) { |
| 176 | case SAA7191_NORM_AUTO: { |
| 177 | unsigned char status; |
| 178 | |
| 179 | // does status depend on current norm ? |
| 180 | if (saa7191_read_status(client, &status)) |
| 181 | return -EIO; |
| 182 | |
| 183 | stdc &= ~SAA7191_STDC_SECS; |
| 184 | ctl3 &= ~SAA7191_CTL3_FSEL; |
| 185 | ctl3 |= SAA7191_CTL3_AUFD; |
| 186 | chcv = (status & SAA7191_STATUS_FIDT) |
| 187 | ? SAA7191_CHCV_NTSC : SAA7191_CHCV_PAL; |
| 188 | break; |
| 189 | } |
| 190 | case SAA7191_NORM_PAL: |
| 191 | stdc &= ~SAA7191_STDC_SECS; |
| 192 | ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); |
| 193 | chcv = SAA7191_CHCV_PAL; |
| 194 | break; |
| 195 | case SAA7191_NORM_NTSC: |
| 196 | stdc &= ~SAA7191_STDC_SECS; |
| 197 | ctl3 &= ~SAA7191_CTL3_AUFD; |
| 198 | ctl3 |= SAA7191_CTL3_FSEL; |
| 199 | chcv = SAA7191_CHCV_NTSC; |
| 200 | break; |
| 201 | case SAA7191_NORM_SECAM: |
| 202 | stdc |= SAA7191_STDC_SECS; |
| 203 | ctl3 &= ~(SAA7191_CTL3_AUFD | SAA7191_CTL3_FSEL); |
| 204 | chcv = SAA7191_CHCV_PAL; |
| 205 | break; |
| 206 | default: |
| 207 | return -EINVAL; |
| 208 | } |
| 209 | |
| 210 | err = saa7191_write_reg(client, SAA7191_REG_CTL3, ctl3); |
| 211 | if (err) |
| 212 | return -EIO; |
| 213 | err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc); |
| 214 | if (err) |
| 215 | return -EIO; |
| 216 | err = saa7191_write_reg(client, SAA7191_REG_CHCV, chcv); |
| 217 | if (err) |
| 218 | return -EIO; |
| 219 | |
| 220 | decoder->norm = norm; |
| 221 | |
| 222 | return 0; |
| 223 | } |
| 224 | |
| 225 | static int saa7191_get_controls(struct i2c_client *client, |
| 226 | struct saa7191_control *ctrl) |
| 227 | { |
| 228 | unsigned char hue = saa7191_read_reg(client, SAA7191_REG_HUEC); |
| 229 | unsigned char stdc = saa7191_read_reg(client, SAA7191_REG_STDC); |
| 230 | |
| 231 | if (hue < 0x80) { |
| 232 | hue += 0x80; |
| 233 | } else { |
| 234 | hue -= 0x80; |
| 235 | } |
| 236 | ctrl->hue = hue; |
| 237 | |
| 238 | ctrl->vtrc = (stdc & SAA7191_STDC_VTRC) |
| 239 | ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; |
| 240 | |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static int saa7191_set_controls(struct i2c_client *client, |
| 245 | struct saa7191_control *ctrl) |
| 246 | { |
| 247 | int err; |
| 248 | |
| 249 | if (ctrl->hue >= 0) { |
| 250 | unsigned char hue = ctrl->hue & 0xff; |
| 251 | if (hue < 0x80) { |
| 252 | hue += 0x80; |
| 253 | } else { |
| 254 | hue -= 0x80; |
| 255 | } |
| 256 | err = saa7191_write_reg(client, SAA7191_REG_HUEC, hue); |
| 257 | if (err) |
| 258 | return -EIO; |
| 259 | } |
| 260 | if (ctrl->vtrc >= 0) { |
| 261 | unsigned char stdc = |
| 262 | saa7191_read_reg(client, SAA7191_REG_STDC); |
| 263 | |
| 264 | if (ctrl->vtrc) { |
| 265 | stdc |= SAA7191_STDC_VTRC; |
| 266 | } else { |
| 267 | stdc &= ~SAA7191_STDC_VTRC; |
| 268 | } |
| 269 | |
| 270 | err = saa7191_write_reg(client, SAA7191_REG_STDC, stdc); |
| 271 | if (err) |
| 272 | return -EIO; |
| 273 | } |
| 274 | |
| 275 | return 0; |
| 276 | } |
| 277 | |
| 278 | /* I2C-interface */ |
| 279 | |
| 280 | static int saa7191_attach(struct i2c_adapter *adap, int addr, int kind) |
| 281 | { |
| 282 | int err = 0; |
| 283 | struct saa7191 *decoder; |
| 284 | struct i2c_client *client; |
| 285 | |
| 286 | printk(KERN_INFO "Philips SAA7191 driver version %s\n", |
| 287 | SAA7191_MODULE_VERSION); |
| 288 | |
| 289 | client = kmalloc(sizeof(*client), GFP_KERNEL); |
| 290 | if (!client) |
| 291 | return -ENOMEM; |
| 292 | decoder = kmalloc(sizeof(*decoder), GFP_KERNEL); |
| 293 | if (!decoder) { |
| 294 | err = -ENOMEM; |
| 295 | goto out_free_client; |
| 296 | } |
| 297 | |
| 298 | memset(client, 0, sizeof(struct i2c_client)); |
| 299 | memset(decoder, 0, sizeof(struct saa7191)); |
| 300 | |
| 301 | client->addr = addr; |
| 302 | client->adapter = adap; |
| 303 | client->driver = &i2c_driver_saa7191; |
| 304 | client->flags = 0; |
| 305 | strcpy(client->name, "saa7191 client"); |
| 306 | i2c_set_clientdata(client, decoder); |
| 307 | |
| 308 | decoder->client = client; |
| 309 | |
| 310 | err = i2c_attach_client(client); |
| 311 | if (err) |
| 312 | goto out_free_decoder; |
| 313 | |
| 314 | decoder->input = SAA7191_INPUT_COMPOSITE; |
| 315 | decoder->norm = SAA7191_NORM_AUTO; |
| 316 | |
| 317 | err = saa7191_write_block(client, sizeof(initseq), |
| 318 | (unsigned char *)initseq); |
| 319 | if (err) { |
| 320 | printk(KERN_ERR "SAA7191 initialization failed\n"); |
| 321 | goto out_detach_client; |
| 322 | } |
| 323 | |
| 324 | printk(KERN_INFO "SAA7191 initialized\n"); |
| 325 | |
| 326 | return 0; |
| 327 | |
| 328 | out_detach_client: |
| 329 | i2c_detach_client(client); |
| 330 | out_free_decoder: |
| 331 | kfree(decoder); |
| 332 | out_free_client: |
| 333 | kfree(client); |
| 334 | return err; |
| 335 | } |
| 336 | |
| 337 | static int saa7191_probe(struct i2c_adapter *adap) |
| 338 | { |
| 339 | /* Always connected to VINO */ |
| 340 | if (adap->id == VINO_ADAPTER) |
| 341 | return saa7191_attach(adap, SAA7191_ADDR, 0); |
| 342 | /* Feel free to add probe here :-) */ |
| 343 | return -ENODEV; |
| 344 | } |
| 345 | |
| 346 | static int saa7191_detach(struct i2c_client *client) |
| 347 | { |
| 348 | struct saa7191 *decoder = i2c_get_clientdata(client); |
| 349 | |
| 350 | i2c_detach_client(client); |
| 351 | kfree(decoder); |
| 352 | kfree(client); |
| 353 | return 0; |
| 354 | } |
| 355 | |
| 356 | static int saa7191_command(struct i2c_client *client, unsigned int cmd, |
| 357 | void *arg) |
| 358 | { |
| 359 | struct saa7191 *decoder = i2c_get_clientdata(client); |
| 360 | |
| 361 | switch (cmd) { |
| 362 | case DECODER_GET_CAPABILITIES: { |
| 363 | struct video_decoder_capability *cap = arg; |
| 364 | |
| 365 | cap->flags = VIDEO_DECODER_PAL | VIDEO_DECODER_NTSC | |
| 366 | VIDEO_DECODER_SECAM | VIDEO_DECODER_AUTO; |
| 367 | cap->inputs = (client->adapter->id == VINO_ADAPTER) ? 2 : 1; |
| 368 | cap->outputs = 1; |
| 369 | break; |
| 370 | } |
| 371 | case DECODER_GET_STATUS: { |
| 372 | int *iarg = arg; |
| 373 | unsigned char status; |
| 374 | int res = 0; |
| 375 | |
| 376 | if (saa7191_read_status(client, &status)) { |
| 377 | return -EIO; |
| 378 | } |
| 379 | if ((status & SAA7191_STATUS_HLCK) == 0) |
| 380 | res |= DECODER_STATUS_GOOD; |
| 381 | if (status & SAA7191_STATUS_CODE) |
| 382 | res |= DECODER_STATUS_COLOR; |
| 383 | switch (decoder->norm) { |
| 384 | case SAA7191_NORM_NTSC: |
| 385 | res |= DECODER_STATUS_NTSC; |
| 386 | break; |
| 387 | case SAA7191_NORM_PAL: |
| 388 | res |= DECODER_STATUS_PAL; |
| 389 | break; |
| 390 | case SAA7191_NORM_SECAM: |
| 391 | res |= DECODER_STATUS_SECAM; |
| 392 | break; |
| 393 | case SAA7191_NORM_AUTO: |
| 394 | default: |
| 395 | if (status & SAA7191_STATUS_FIDT) |
| 396 | res |= DECODER_STATUS_NTSC; |
| 397 | else |
| 398 | res |= DECODER_STATUS_PAL; |
| 399 | break; |
| 400 | } |
| 401 | *iarg = res; |
| 402 | break; |
| 403 | } |
| 404 | case DECODER_SET_NORM: { |
| 405 | int *iarg = arg; |
| 406 | |
| 407 | switch (*iarg) { |
| 408 | case VIDEO_MODE_AUTO: |
| 409 | return saa7191_set_norm(client, SAA7191_NORM_AUTO); |
| 410 | case VIDEO_MODE_PAL: |
| 411 | return saa7191_set_norm(client, SAA7191_NORM_PAL); |
| 412 | case VIDEO_MODE_NTSC: |
| 413 | return saa7191_set_norm(client, SAA7191_NORM_NTSC); |
| 414 | case VIDEO_MODE_SECAM: |
| 415 | return saa7191_set_norm(client, SAA7191_NORM_SECAM); |
| 416 | default: |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | break; |
| 420 | } |
| 421 | case DECODER_SET_INPUT: { |
| 422 | int *iarg = arg; |
| 423 | |
| 424 | switch (client->adapter->id) { |
| 425 | case VINO_ADAPTER: |
| 426 | return saa7191_set_input(client, *iarg); |
| 427 | default: |
| 428 | if (*iarg != 0) |
| 429 | return -EINVAL; |
| 430 | } |
| 431 | break; |
| 432 | } |
| 433 | case DECODER_SET_OUTPUT: { |
| 434 | int *iarg = arg; |
| 435 | |
| 436 | /* not much choice of outputs */ |
| 437 | if (*iarg != 0) |
| 438 | return -EINVAL; |
| 439 | break; |
| 440 | } |
| 441 | case DECODER_ENABLE_OUTPUT: { |
| 442 | /* Always enabled */ |
| 443 | break; |
| 444 | } |
| 445 | case DECODER_SET_PICTURE: { |
| 446 | struct video_picture *pic = arg; |
| 447 | unsigned val; |
| 448 | int err; |
| 449 | |
| 450 | val = (pic->hue >> 8) - 0x80; |
| 451 | err = saa7191_write_reg(client, SAA7191_REG_HUEC, val); |
| 452 | if (err) |
| 453 | return -EIO; |
| 454 | break; |
| 455 | } |
| 456 | case DECODER_SAA7191_GET_STATUS: { |
| 457 | struct saa7191_status *status = arg; |
| 458 | unsigned char status_reg; |
| 459 | |
| 460 | if (saa7191_read_status(client, &status_reg)) |
| 461 | return -EIO; |
| 462 | status->signal = ((status_reg & SAA7191_STATUS_HLCK) == 0) |
| 463 | ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; |
| 464 | status->ntsc = (status_reg & SAA7191_STATUS_FIDT) |
| 465 | ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; |
| 466 | status->color = (status_reg & SAA7191_STATUS_CODE) |
| 467 | ? SAA7191_VALUE_ENABLED : SAA7191_VALUE_DISABLED; |
| 468 | |
| 469 | status->input = decoder->input; |
| 470 | status->norm = decoder->norm; |
| 471 | } |
| 472 | case DECODER_SAA7191_SET_NORM: { |
| 473 | int *norm = arg; |
| 474 | return saa7191_set_norm(client, *norm); |
| 475 | } |
| 476 | case DECODER_SAA7191_GET_CONTROLS: { |
| 477 | struct saa7191_control *ctrl = arg; |
| 478 | return saa7191_get_controls(client, ctrl); |
| 479 | } |
| 480 | case DECODER_SAA7191_SET_CONTROLS: { |
| 481 | struct saa7191_control *ctrl = arg; |
| 482 | return saa7191_set_controls(client, ctrl); |
| 483 | } |
| 484 | default: |
| 485 | return -EINVAL; |
| 486 | } |
| 487 | |
| 488 | return 0; |
| 489 | } |
| 490 | |
| 491 | static struct i2c_driver i2c_driver_saa7191 = { |
| 492 | .owner = THIS_MODULE, |
| 493 | .name = "saa7191", |
| 494 | .id = I2C_DRIVERID_SAA7191, |
| 495 | .flags = I2C_DF_NOTIFY, |
| 496 | .attach_adapter = saa7191_probe, |
| 497 | .detach_client = saa7191_detach, |
| 498 | .command = saa7191_command |
| 499 | }; |
| 500 | |
| 501 | static int saa7191_init(void) |
| 502 | { |
| 503 | return i2c_add_driver(&i2c_driver_saa7191); |
| 504 | } |
| 505 | |
| 506 | static void saa7191_exit(void) |
| 507 | { |
| 508 | i2c_del_driver(&i2c_driver_saa7191); |
| 509 | } |
| 510 | |
| 511 | module_init(saa7191_init); |
| 512 | module_exit(saa7191_exit); |