1 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2 2 * by Eric Lammerts <eric@scintilla.utwente.nl> 3 * 4 * Based on radio-aztech.c. Original notes: 5 * 6 * Adapted to support the Video for Linux API by 7 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by: 8 * 9 * Quay Ly 10 * Donald Song 11 * Jason Lewis (jlewis@twilight.vtc.vsc.edu) 12 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu) 13 * William McGrath (wmcgrath@twilight.vtc.vsc.edu) 14 * 15 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> 16 */ 17 18 #include <stdarg.h> 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/ioport.h> 22 #include <linux/videodev2.h> 23 #include <linux/io.h> 24 #include <media/v4l2-device.h> 25 #include <media/v4l2-ioctl.h> 26 27 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); 28 MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); 29 MODULE_LICENSE("GPL"); 30 MODULE_VERSION("0.0.3"); 31 32 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */ 33 34 #ifndef CONFIG_RADIO_TRUST_PORT 35 #define CONFIG_RADIO_TRUST_PORT -1 36 #endif 37 38 static int io = CONFIG_RADIO_TRUST_PORT; 39 static int radio_nr = -1; 40 41 module_param(io, int, 0); 42 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)"); 43 module_param(radio_nr, int, 0); 44 45 struct trust { 46 struct v4l2_device v4l2_dev; 47 struct video_device vdev; 48 int io; 49 int ioval; 50 __u16 curvol; 51 __u16 curbass; 52 __u16 curtreble; 53 int muted; 54 unsigned long curfreq; 55 int curstereo; 56 int curmute; 57 struct mutex lock; 58 }; 59 60 static struct trust trust_card; 61 62 /* i2c addresses */ 63 #define TDA7318_ADDR 0x88 64 #define TSA6060T_ADDR 0xc4 65 66 #define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0) 67 #define TR_SET_SCL outb(tr->ioval |= 2, tr->io) 68 #define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io) 69 #define TR_SET_SDA outb(tr->ioval |= 1, tr->io) 70 #define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io) 71 72 static void write_i2c(struct trust *tr, int n, ...) 73 { 74 unsigned char val, mask; 75 va_list args; 76 77 va_start(args, n); 78 79 /* start condition */ 80 TR_SET_SDA; 81 TR_SET_SCL; 82 TR_DELAY; 83 TR_CLR_SDA; 84 TR_CLR_SCL; 85 TR_DELAY; 86 87 for(; n; n--) { 88 val = va_arg(args, unsigned); 89 for(mask = 0x80; mask; mask >>= 1) { 90 if(val & mask) 91 TR_SET_SDA; 92 else 93 TR_CLR_SDA; 94 TR_SET_SCL; 95 TR_DELAY; 96 TR_CLR_SCL; 97 TR_DELAY; 98 } 99 /* acknowledge bit */ 100 TR_SET_SDA; 101 TR_SET_SCL; 102 TR_DELAY; 103 TR_CLR_SCL; 104 TR_DELAY; 105 } 106 107 /* stop condition */ 108 TR_CLR_SDA; 109 TR_DELAY; 110 TR_SET_SCL; 111 TR_DELAY; 112 TR_SET_SDA; 113 TR_DELAY; 114 115 va_end(args); 116 } 117 118 static void tr_setvol(struct trust *tr, __u16 vol) 119 { 120 mutex_lock(&tr->lock); 121 tr->curvol = vol / 2048; 122 write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f); 123 mutex_unlock(&tr->lock); 124 } 125 126 static int basstreble2chip[15] = { 127 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 128 }; 129 130 static void tr_setbass(struct trust *tr, __u16 bass) 131 { 132 mutex_lock(&tr->lock); 133 tr->curbass = bass / 4370; 134 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]); 135 mutex_unlock(&tr->lock); 136 } 137 138 static void tr_settreble(struct trust *tr, __u16 treble) 139 { 140 mutex_lock(&tr->lock); 141 tr->curtreble = treble / 4370; 142 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]); 143 mutex_unlock(&tr->lock); 144 } 145 146 static void tr_setstereo(struct trust *tr, int stereo) 147 { 148 mutex_lock(&tr->lock); 149 tr->curstereo = !!stereo; 150 tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2); 151 outb(tr->ioval, tr->io); 152 mutex_unlock(&tr->lock); 153 } 154 155 static void tr_setmute(struct trust *tr, int mute) 156 { 157 mutex_lock(&tr->lock); 158 tr->curmute = !!mute; 159 tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3); 160 outb(tr->ioval, tr->io); 161 mutex_unlock(&tr->lock); 162 } 163 164 static int tr_getsigstr(struct trust *tr) 165 { 166 int i, v; 167 168 mutex_lock(&tr->lock); 169 for (i = 0, v = 0; i < 100; i++) 170 v |= inb(tr->io); 171 mutex_unlock(&tr->lock); 172 return (v & 1) ? 0 : 0xffff; 173 } 174 175 static int tr_getstereo(struct trust *tr) 176 { 177 /* don't know how to determine it, just return the setting */ 178 return tr->curstereo; 179 } 180 181 static void tr_setfreq(struct trust *tr, unsigned long f) 182 { 183 mutex_lock(&tr->lock); 184 tr->curfreq = f; 185 f /= 160; /* Convert to 10 kHz units */ 186 f += 1070; /* Add 10.7 MHz IF */ 187 write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0); 188 mutex_unlock(&tr->lock); 189 } 190 191 static int vidioc_querycap(struct file *file, void *priv, 192 struct v4l2_capability *v) 193 { 194 strlcpy(v->driver, "radio-trust", sizeof(v->driver)); 195 strlcpy(v->card, "Trust FM Radio", sizeof(v->card)); 196 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 197 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 198 return 0; 199 } 200 201 static int vidioc_g_tuner(struct file *file, void *priv, 202 struct v4l2_tuner *v) 203 { 204 struct trust *tr = video_drvdata(file); 205 206 if (v->index > 0) 207 return -EINVAL; 208 209 strlcpy(v->name, "FM", sizeof(v->name)); 210 v->type = V4L2_TUNER_RADIO; 211 v->rangelow = 87.5 * 16000; 212 v->rangehigh = 108 * 16000; 213 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 214 v->capability = V4L2_TUNER_CAP_LOW; 215 if (tr_getstereo(tr)) 216 v->audmode = V4L2_TUNER_MODE_STEREO; 217 else 218 v->audmode = V4L2_TUNER_MODE_MONO; 219 v->signal = tr_getsigstr(tr); 220 return 0; 221 } 222 223 static int vidioc_s_tuner(struct file *file, void *priv, 224 struct v4l2_tuner *v) 225 { 226 struct trust *tr = video_drvdata(file); 227 228 if (v->index) 229 return -EINVAL; 230 tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO); 231 return 0; 232 } 233 234 static int vidioc_s_frequency(struct file *file, void *priv, 235 struct v4l2_frequency *f) 236 { 237 struct trust *tr = video_drvdata(file); 238 239 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 240 return -EINVAL; 241 tr_setfreq(tr, f->frequency); 242 return 0; 243 } 244 245 static int vidioc_g_frequency(struct file *file, void *priv, 246 struct v4l2_frequency *f) 247 { 248 struct trust *tr = video_drvdata(file); 249 250 if (f->tuner != 0) 251 return -EINVAL; 252 f->type = V4L2_TUNER_RADIO; 253 f->frequency = tr->curfreq; 254 return 0; 255 } 256 257 static int vidioc_queryctrl(struct file *file, void *priv, 258 struct v4l2_queryctrl *qc) 259 { 260 switch (qc->id) { 261 case V4L2_CID_AUDIO_MUTE: 262 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 263 case V4L2_CID_AUDIO_VOLUME: 264 return v4l2_ctrl_query_fill(qc, 0, 65535, 2048, 65535); 265 case V4L2_CID_AUDIO_BASS: 266 case V4L2_CID_AUDIO_TREBLE: 267 return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768); 268 } 269 return -EINVAL; 270 } 271 272 static int vidioc_g_ctrl(struct file *file, void *priv, 273 struct v4l2_control *ctrl) 274 { 275 struct trust *tr = video_drvdata(file); 276 277 switch (ctrl->id) { 278 case V4L2_CID_AUDIO_MUTE: 279 ctrl->value = tr->curmute; 280 return 0; 281 case V4L2_CID_AUDIO_VOLUME: 282 ctrl->value = tr->curvol * 2048; 283 return 0; 284 case V4L2_CID_AUDIO_BASS: 285 ctrl->value = tr->curbass * 4370; 286 return 0; 287 case V4L2_CID_AUDIO_TREBLE: 288 ctrl->value = tr->curtreble * 4370; 289 return 0; 290 } 291 return -EINVAL; 292 } 293 294 static int vidioc_s_ctrl(struct file *file, void *priv, 295 struct v4l2_control *ctrl) 296 { 297 struct trust *tr = video_drvdata(file); 298 299 switch (ctrl->id) { 300 case V4L2_CID_AUDIO_MUTE: 301 tr_setmute(tr, ctrl->value); 302 return 0; 303 case V4L2_CID_AUDIO_VOLUME: 304 tr_setvol(tr, ctrl->value); 305 return 0; 306 case V4L2_CID_AUDIO_BASS: 307 tr_setbass(tr, ctrl->value); 308 return 0; 309 case V4L2_CID_AUDIO_TREBLE: 310 tr_settreble(tr, ctrl->value); 311 return 0; 312 } 313 return -EINVAL; 314 } 315 316 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 317 { 318 *i = 0; 319 return 0; 320 } 321 322 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 323 { 324 return i ? -EINVAL : 0; 325 } 326 327 static int vidioc_g_audio(struct file *file, void *priv, 328 struct v4l2_audio *a) 329 { 330 a->index = 0; 331 strlcpy(a->name, "Radio", sizeof(a->name)); 332 a->capability = V4L2_AUDCAP_STEREO; 333 return 0; 334 } 335 336 static int vidioc_s_audio(struct file *file, void *priv, 337 struct v4l2_audio *a) 338 { 339 return a->index ? -EINVAL : 0; 340 } 341 342 static const struct v4l2_file_operations trust_fops = { 343 .owner = THIS_MODULE, 344 .unlocked_ioctl = video_ioctl2, 345 }; 346 347 static const struct v4l2_ioctl_ops trust_ioctl_ops = { 348 .vidioc_querycap = vidioc_querycap, 349 .vidioc_g_tuner = vidioc_g_tuner, 350 .vidioc_s_tuner = vidioc_s_tuner, 351 .vidioc_g_frequency = vidioc_g_frequency, 352 .vidioc_s_frequency = vidioc_s_frequency, 353 .vidioc_queryctrl = vidioc_queryctrl, 354 .vidioc_g_ctrl = vidioc_g_ctrl, 355 .vidioc_s_ctrl = vidioc_s_ctrl, 356 .vidioc_g_audio = vidioc_g_audio, 357 .vidioc_s_audio = vidioc_s_audio, 358 .vidioc_g_input = vidioc_g_input, 359 .vidioc_s_input = vidioc_s_input, 360 }; 361 362 static int __init trust_init(void) 363 { 364 struct trust *tr = &trust_card; 365 struct v4l2_device *v4l2_dev = &tr->v4l2_dev; 366 int res; 367 368 strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name)); 369 tr->io = io; 370 tr->ioval = 0xf; 371 mutex_init(&tr->lock); 372 373 if (tr->io == -1) { 374 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n"); 375 return -EINVAL; 376 } 377 if (!request_region(tr->io, 2, "Trust FM Radio")) { 378 v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io); 379 return -EBUSY; 380 } 381 382 res = v4l2_device_register(NULL, v4l2_dev); 383 if (res < 0) { 384 release_region(tr->io, 2); 385 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 386 return res; 387 } 388 389 strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name)); 390 tr->vdev.v4l2_dev = v4l2_dev; 391 tr->vdev.fops = &trust_fops; 392 tr->vdev.ioctl_ops = &trust_ioctl_ops; 393 tr->vdev.release = video_device_release_empty; 394 video_set_drvdata(&tr->vdev, tr); 395 396 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ 397 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ 398 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ 399 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */ 400 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */ 401 402 tr_setvol(tr, 0xffff); 403 tr_setbass(tr, 0x8000); 404 tr_settreble(tr, 0x8000); 405 tr_setstereo(tr, 1); 406 407 /* mute card - prevents noisy bootups */ 408 tr_setmute(tr, 1); 409 410 if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 411 v4l2_device_unregister(v4l2_dev); 412 release_region(tr->io, 2); 413 return -EINVAL; 414 } 415 416 v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n"); 417 418 return 0; 419 } 420 421 static void __exit cleanup_trust_module(void) 422 { 423 struct trust *tr = &trust_card; 424 425 video_unregister_device(&tr->vdev); 426 v4l2_device_unregister(&tr->v4l2_dev); 427 release_region(tr->io, 2); 428 } 429 430 module_init(trust_init); 431 module_exit(cleanup_trust_module); 432