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/version.h> /* for KERNEL_VERSION MACRO */ 23 #include <linux/videodev2.h> 24 #include <linux/io.h> 25 #include <media/v4l2-device.h> 26 #include <media/v4l2-ioctl.h> 27 28 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath"); 29 MODULE_DESCRIPTION("A driver for the Trust FM Radio card."); 30 MODULE_LICENSE("GPL"); 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 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) 46 47 struct trust { 48 struct v4l2_device v4l2_dev; 49 struct video_device vdev; 50 int io; 51 int ioval; 52 __u16 curvol; 53 __u16 curbass; 54 __u16 curtreble; 55 int muted; 56 unsigned long curfreq; 57 int curstereo; 58 int curmute; 59 struct mutex lock; 60 }; 61 62 static struct trust trust_card; 63 64 /* i2c addresses */ 65 #define TDA7318_ADDR 0x88 66 #define TSA6060T_ADDR 0xc4 67 68 #define TR_DELAY do { inb(tr->io); inb(tr->io); inb(tr->io); } while (0) 69 #define TR_SET_SCL outb(tr->ioval |= 2, tr->io) 70 #define TR_CLR_SCL outb(tr->ioval &= 0xfd, tr->io) 71 #define TR_SET_SDA outb(tr->ioval |= 1, tr->io) 72 #define TR_CLR_SDA outb(tr->ioval &= 0xfe, tr->io) 73 74 static void write_i2c(struct trust *tr, int n, ...) 75 { 76 unsigned char val, mask; 77 va_list args; 78 79 va_start(args, n); 80 81 /* start condition */ 82 TR_SET_SDA; 83 TR_SET_SCL; 84 TR_DELAY; 85 TR_CLR_SDA; 86 TR_CLR_SCL; 87 TR_DELAY; 88 89 for(; n; n--) { 90 val = va_arg(args, unsigned); 91 for(mask = 0x80; mask; mask >>= 1) { 92 if(val & mask) 93 TR_SET_SDA; 94 else 95 TR_CLR_SDA; 96 TR_SET_SCL; 97 TR_DELAY; 98 TR_CLR_SCL; 99 TR_DELAY; 100 } 101 /* acknowledge bit */ 102 TR_SET_SDA; 103 TR_SET_SCL; 104 TR_DELAY; 105 TR_CLR_SCL; 106 TR_DELAY; 107 } 108 109 /* stop condition */ 110 TR_CLR_SDA; 111 TR_DELAY; 112 TR_SET_SCL; 113 TR_DELAY; 114 TR_SET_SDA; 115 TR_DELAY; 116 117 va_end(args); 118 } 119 120 static void tr_setvol(struct trust *tr, __u16 vol) 121 { 122 mutex_lock(&tr->lock); 123 tr->curvol = vol / 2048; 124 write_i2c(tr, 2, TDA7318_ADDR, tr->curvol ^ 0x1f); 125 mutex_unlock(&tr->lock); 126 } 127 128 static int basstreble2chip[15] = { 129 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8 130 }; 131 132 static void tr_setbass(struct trust *tr, __u16 bass) 133 { 134 mutex_lock(&tr->lock); 135 tr->curbass = bass / 4370; 136 write_i2c(tr, 2, TDA7318_ADDR, 0x60 | basstreble2chip[tr->curbass]); 137 mutex_unlock(&tr->lock); 138 } 139 140 static void tr_settreble(struct trust *tr, __u16 treble) 141 { 142 mutex_lock(&tr->lock); 143 tr->curtreble = treble / 4370; 144 write_i2c(tr, 2, TDA7318_ADDR, 0x70 | basstreble2chip[tr->curtreble]); 145 mutex_unlock(&tr->lock); 146 } 147 148 static void tr_setstereo(struct trust *tr, int stereo) 149 { 150 mutex_lock(&tr->lock); 151 tr->curstereo = !!stereo; 152 tr->ioval = (tr->ioval & 0xfb) | (!tr->curstereo << 2); 153 outb(tr->ioval, tr->io); 154 mutex_unlock(&tr->lock); 155 } 156 157 static void tr_setmute(struct trust *tr, int mute) 158 { 159 mutex_lock(&tr->lock); 160 tr->curmute = !!mute; 161 tr->ioval = (tr->ioval & 0xf7) | (tr->curmute << 3); 162 outb(tr->ioval, tr->io); 163 mutex_unlock(&tr->lock); 164 } 165 166 static int tr_getsigstr(struct trust *tr) 167 { 168 int i, v; 169 170 mutex_lock(&tr->lock); 171 for (i = 0, v = 0; i < 100; i++) 172 v |= inb(tr->io); 173 mutex_unlock(&tr->lock); 174 return (v & 1) ? 0 : 0xffff; 175 } 176 177 static int tr_getstereo(struct trust *tr) 178 { 179 /* don't know how to determine it, just return the setting */ 180 return tr->curstereo; 181 } 182 183 static void tr_setfreq(struct trust *tr, unsigned long f) 184 { 185 mutex_lock(&tr->lock); 186 tr->curfreq = f; 187 f /= 160; /* Convert to 10 kHz units */ 188 f += 1070; /* Add 10.7 MHz IF */ 189 write_i2c(tr, 5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0); 190 mutex_unlock(&tr->lock); 191 } 192 193 static int vidioc_querycap(struct file *file, void *priv, 194 struct v4l2_capability *v) 195 { 196 strlcpy(v->driver, "radio-trust", sizeof(v->driver)); 197 strlcpy(v->card, "Trust FM Radio", sizeof(v->card)); 198 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 199 v->version = RADIO_VERSION; 200 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 201 return 0; 202 } 203 204 static int vidioc_g_tuner(struct file *file, void *priv, 205 struct v4l2_tuner *v) 206 { 207 struct trust *tr = video_drvdata(file); 208 209 if (v->index > 0) 210 return -EINVAL; 211 212 strlcpy(v->name, "FM", sizeof(v->name)); 213 v->type = V4L2_TUNER_RADIO; 214 v->rangelow = 87.5 * 16000; 215 v->rangehigh = 108 * 16000; 216 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO; 217 v->capability = V4L2_TUNER_CAP_LOW; 218 if (tr_getstereo(tr)) 219 v->audmode = V4L2_TUNER_MODE_STEREO; 220 else 221 v->audmode = V4L2_TUNER_MODE_MONO; 222 v->signal = tr_getsigstr(tr); 223 return 0; 224 } 225 226 static int vidioc_s_tuner(struct file *file, void *priv, 227 struct v4l2_tuner *v) 228 { 229 struct trust *tr = video_drvdata(file); 230 231 if (v->index) 232 return -EINVAL; 233 tr_setstereo(tr, v->audmode == V4L2_TUNER_MODE_STEREO); 234 return 0; 235 } 236 237 static int vidioc_s_frequency(struct file *file, void *priv, 238 struct v4l2_frequency *f) 239 { 240 struct trust *tr = video_drvdata(file); 241 242 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 243 return -EINVAL; 244 tr_setfreq(tr, f->frequency); 245 return 0; 246 } 247 248 static int vidioc_g_frequency(struct file *file, void *priv, 249 struct v4l2_frequency *f) 250 { 251 struct trust *tr = video_drvdata(file); 252 253 if (f->tuner != 0) 254 return -EINVAL; 255 f->type = V4L2_TUNER_RADIO; 256 f->frequency = tr->curfreq; 257 return 0; 258 } 259 260 static int vidioc_queryctrl(struct file *file, void *priv, 261 struct v4l2_queryctrl *qc) 262 { 263 switch (qc->id) { 264 case V4L2_CID_AUDIO_MUTE: 265 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 266 case V4L2_CID_AUDIO_VOLUME: 267 return v4l2_ctrl_query_fill(qc, 0, 65535, 2048, 65535); 268 case V4L2_CID_AUDIO_BASS: 269 case V4L2_CID_AUDIO_TREBLE: 270 return v4l2_ctrl_query_fill(qc, 0, 65535, 4370, 32768); 271 } 272 return -EINVAL; 273 } 274 275 static int vidioc_g_ctrl(struct file *file, void *priv, 276 struct v4l2_control *ctrl) 277 { 278 struct trust *tr = video_drvdata(file); 279 280 switch (ctrl->id) { 281 case V4L2_CID_AUDIO_MUTE: 282 ctrl->value = tr->curmute; 283 return 0; 284 case V4L2_CID_AUDIO_VOLUME: 285 ctrl->value = tr->curvol * 2048; 286 return 0; 287 case V4L2_CID_AUDIO_BASS: 288 ctrl->value = tr->curbass * 4370; 289 return 0; 290 case V4L2_CID_AUDIO_TREBLE: 291 ctrl->value = tr->curtreble * 4370; 292 return 0; 293 } 294 return -EINVAL; 295 } 296 297 static int vidioc_s_ctrl(struct file *file, void *priv, 298 struct v4l2_control *ctrl) 299 { 300 struct trust *tr = video_drvdata(file); 301 302 switch (ctrl->id) { 303 case V4L2_CID_AUDIO_MUTE: 304 tr_setmute(tr, ctrl->value); 305 return 0; 306 case V4L2_CID_AUDIO_VOLUME: 307 tr_setvol(tr, ctrl->value); 308 return 0; 309 case V4L2_CID_AUDIO_BASS: 310 tr_setbass(tr, ctrl->value); 311 return 0; 312 case V4L2_CID_AUDIO_TREBLE: 313 tr_settreble(tr, ctrl->value); 314 return 0; 315 } 316 return -EINVAL; 317 } 318 319 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 320 { 321 *i = 0; 322 return 0; 323 } 324 325 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 326 { 327 return i ? -EINVAL : 0; 328 } 329 330 static int vidioc_g_audio(struct file *file, void *priv, 331 struct v4l2_audio *a) 332 { 333 a->index = 0; 334 strlcpy(a->name, "Radio", sizeof(a->name)); 335 a->capability = V4L2_AUDCAP_STEREO; 336 return 0; 337 } 338 339 static int vidioc_s_audio(struct file *file, void *priv, 340 struct v4l2_audio *a) 341 { 342 return a->index ? -EINVAL : 0; 343 } 344 345 static const struct v4l2_file_operations trust_fops = { 346 .owner = THIS_MODULE, 347 .ioctl = video_ioctl2, 348 }; 349 350 static const struct v4l2_ioctl_ops trust_ioctl_ops = { 351 .vidioc_querycap = vidioc_querycap, 352 .vidioc_g_tuner = vidioc_g_tuner, 353 .vidioc_s_tuner = vidioc_s_tuner, 354 .vidioc_g_frequency = vidioc_g_frequency, 355 .vidioc_s_frequency = vidioc_s_frequency, 356 .vidioc_queryctrl = vidioc_queryctrl, 357 .vidioc_g_ctrl = vidioc_g_ctrl, 358 .vidioc_s_ctrl = vidioc_s_ctrl, 359 .vidioc_g_audio = vidioc_g_audio, 360 .vidioc_s_audio = vidioc_s_audio, 361 .vidioc_g_input = vidioc_g_input, 362 .vidioc_s_input = vidioc_s_input, 363 }; 364 365 static int __init trust_init(void) 366 { 367 struct trust *tr = &trust_card; 368 struct v4l2_device *v4l2_dev = &tr->v4l2_dev; 369 int res; 370 371 strlcpy(v4l2_dev->name, "trust", sizeof(v4l2_dev->name)); 372 tr->io = io; 373 tr->ioval = 0xf; 374 mutex_init(&tr->lock); 375 376 if (tr->io == -1) { 377 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x0x350 or 0x358\n"); 378 return -EINVAL; 379 } 380 if (!request_region(tr->io, 2, "Trust FM Radio")) { 381 v4l2_err(v4l2_dev, "port 0x%x already in use\n", tr->io); 382 return -EBUSY; 383 } 384 385 res = v4l2_device_register(NULL, v4l2_dev); 386 if (res < 0) { 387 release_region(tr->io, 2); 388 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 389 return res; 390 } 391 392 strlcpy(tr->vdev.name, v4l2_dev->name, sizeof(tr->vdev.name)); 393 tr->vdev.v4l2_dev = v4l2_dev; 394 tr->vdev.fops = &trust_fops; 395 tr->vdev.ioctl_ops = &trust_ioctl_ops; 396 tr->vdev.release = video_device_release_empty; 397 video_set_drvdata(&tr->vdev, tr); 398 399 if (video_register_device(&tr->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 400 v4l2_device_unregister(v4l2_dev); 401 release_region(tr->io, 2); 402 return -EINVAL; 403 } 404 405 v4l2_info(v4l2_dev, "Trust FM Radio card driver v1.0.\n"); 406 407 write_i2c(tr, 2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */ 408 write_i2c(tr, 2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */ 409 write_i2c(tr, 2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */ 410 write_i2c(tr, 2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */ 411 write_i2c(tr, 2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */ 412 413 tr_setvol(tr, 0xffff); 414 tr_setbass(tr, 0x8000); 415 tr_settreble(tr, 0x8000); 416 tr_setstereo(tr, 1); 417 418 /* mute card - prevents noisy bootups */ 419 tr_setmute(tr, 1); 420 421 return 0; 422 } 423 424 static void __exit cleanup_trust_module(void) 425 { 426 struct trust *tr = &trust_card; 427 428 video_unregister_device(&tr->vdev); 429 v4l2_device_unregister(&tr->v4l2_dev); 430 release_region(tr->io, 2); 431 } 432 433 module_init(trust_init); 434 module_exit(cleanup_trust_module); 435