drivers/media/radio/radio-trust.c

   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 <asm/io.h>
  23 #include <asm/uaccess.h>
  24 #include <linux/videodev2.h>
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-ioctl.h>
  27
  28 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
  29 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
  30
  31 static struct v4l2_queryctrl radio_qctrl[] = {
  32         {
  33                 .id            = V4L2_CID_AUDIO_MUTE,
  34                 .name          = "Mute",
  35                 .minimum       = 0,
  36                 .maximum       = 1,
  37                 .default_value = 1,
  38                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
  39         },{
  40                 .id            = V4L2_CID_AUDIO_VOLUME,
  41                 .name          = "Volume",
  42                 .minimum       = 0,
  43                 .maximum       = 65535,
  44                 .step          = 2048,
  45                 .default_value = 65535,
  46                 .type          = V4L2_CTRL_TYPE_INTEGER,
  47         },{
  48                 .id            = V4L2_CID_AUDIO_BASS,
  49                 .name          = "Bass",
  50                 .minimum       = 0,
  51                 .maximum       = 65535,
  52                 .step          = 4370,
  53                 .default_value = 32768,
  54                 .type          = V4L2_CTRL_TYPE_INTEGER,
  55         },{
  56                 .id            = V4L2_CID_AUDIO_TREBLE,
  57                 .name          = "Treble",
  58                 .minimum       = 0,
  59                 .maximum       = 65535,
  60                 .step          = 4370,
  61                 .default_value = 32768,
  62                 .type          = V4L2_CTRL_TYPE_INTEGER,
  63         },
  64 };
  65
  66 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
  67
  68 #ifndef CONFIG_RADIO_TRUST_PORT
  69 #define CONFIG_RADIO_TRUST_PORT -1
  70 #endif
  71
  72 static int io = CONFIG_RADIO_TRUST_PORT;
  73 static int radio_nr = -1;
  74 static int ioval = 0xf;
  75 static __u16 curvol;
  76 static __u16 curbass;
  77 static __u16 curtreble;
  78 static unsigned long curfreq;
  79 static int curstereo;
  80 static int curmute;
  81 static unsigned long in_use;
  82
  83 /* i2c addresses */
  84 #define TDA7318_ADDR 0x88
  85 #define TSA6060T_ADDR 0xc4
  86
  87 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
  88 #define TR_SET_SCL outb(ioval |= 2, io)
  89 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
  90 #define TR_SET_SDA outb(ioval |= 1, io)
  91 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
  92
  93 static void write_i2c(int n, ...)
  94 {
  95         unsigned char val, mask;
  96         va_list args;
  97
  98         va_start(args, n);
  99
 100         /* start condition */
 101         TR_SET_SDA;
 102         TR_SET_SCL;
 103         TR_DELAY;
 104         TR_CLR_SDA;
 105         TR_CLR_SCL;
 106         TR_DELAY;
 107
 108         for(; n; n--) {
 109                 val = va_arg(args, unsigned);
 110                 for(mask = 0x80; mask; mask >>= 1) {
 111                         if(val & mask)
 112                                 TR_SET_SDA;
 113                         else
 114                                 TR_CLR_SDA;
 115                         TR_SET_SCL;
 116                         TR_DELAY;
 117                         TR_CLR_SCL;
 118                         TR_DELAY;
 119                 }
 120                 /* acknowledge bit */
 121                 TR_SET_SDA;
 122                 TR_SET_SCL;
 123                 TR_DELAY;
 124                 TR_CLR_SCL;
 125                 TR_DELAY;
 126         }
 127
 128         /* stop condition */
 129         TR_CLR_SDA;
 130         TR_DELAY;
 131         TR_SET_SCL;
 132         TR_DELAY;
 133         TR_SET_SDA;
 134         TR_DELAY;
 135
 136         va_end(args);
 137 }
 138
 139 static void tr_setvol(__u16 vol)
 140 {
 141         curvol = vol / 2048;
 142         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
 143 }
 144
 145 static int basstreble2chip[15] = {
 146         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
 147 };
 148
 149 static void tr_setbass(__u16 bass)
 150 {
 151         curbass = bass / 4370;
 152         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
 153 }
 154
 155 static void tr_settreble(__u16 treble)
 156 {
 157         curtreble = treble / 4370;
 158         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
 159 }
 160
 161 static void tr_setstereo(int stereo)
 162 {
 163         curstereo = !!stereo;
 164         ioval = (ioval & 0xfb) | (!curstereo << 2);
 165         outb(ioval, io);
 166 }
 167
 168 static void tr_setmute(int mute)
 169 {
 170         curmute = !!mute;
 171         ioval = (ioval & 0xf7) | (curmute << 3);
 172         outb(ioval, io);
 173 }
 174
 175 static int tr_getsigstr(void)
 176 {
 177         int i, v;
 178
 179         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
 180         return (v & 1)? 0 : 0xffff;
 181 }
 182
 183 static int tr_getstereo(void)
 184 {
 185         /* don't know how to determine it, just return the setting */
 186         return curstereo;
 187 }
 188
 189 static void tr_setfreq(unsigned long f)
 190 {
 191         f /= 160;       /* Convert to 10 kHz units      */
 192         f += 1070;      /* Add 10.7 MHz IF                      */
 193
 194         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
 195 }
 196
 197 static int vidioc_querycap(struct file *file, void *priv,
 198                                 struct v4l2_capability *v)
 199 {
 200         strlcpy(v->driver, "radio-trust", sizeof(v->driver));
 201         strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
 202         sprintf(v->bus_info, "ISA");
 203         v->version = RADIO_VERSION;
 204         v->capabilities = V4L2_CAP_TUNER;
 205         return 0;
 206 }
 207
 208 static int vidioc_g_tuner(struct file *file, void *priv,
 209                                 struct v4l2_tuner *v)
 210 {
 211         if (v->index > 0)
 212                 return -EINVAL;
 213
 214         strcpy(v->name, "FM");
 215         v->type = V4L2_TUNER_RADIO;
 216         v->rangelow = (87.5*16000);
 217         v->rangehigh = (108*16000);
 218         v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
 219         v->capability = V4L2_TUNER_CAP_LOW;
 220         if (tr_getstereo())
 221                 v->audmode = V4L2_TUNER_MODE_STEREO;
 222         else
 223                 v->audmode = V4L2_TUNER_MODE_MONO;
 224         v->signal = tr_getsigstr();
 225         return 0;
 226 }
 227
 228 static int vidioc_s_tuner(struct file *file, void *priv,
 229                                 struct v4l2_tuner *v)
 230 {
 231         if (v->index > 0)
 232                 return -EINVAL;
 233
 234         return 0;
 235 }
 236
 237 static int vidioc_s_frequency(struct file *file, void *priv,
 238                                 struct v4l2_frequency *f)
 239 {
 240         curfreq = f->frequency;
 241         tr_setfreq(curfreq);
 242         return 0;
 243 }
 244
 245 static int vidioc_g_frequency(struct file *file, void *priv,
 246                                 struct v4l2_frequency *f)
 247 {
 248         f->type = V4L2_TUNER_RADIO;
 249         f->frequency = curfreq;
 250         return 0;
 251 }
 252
 253 static int vidioc_queryctrl(struct file *file, void *priv,
 254                                 struct v4l2_queryctrl *qc)
 255 {
 256         int i;
 257
 258         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 259                 if (qc->id && qc->id == radio_qctrl[i].id) {
 260                         memcpy(qc, &(radio_qctrl[i]),
 261                                                 sizeof(*qc));
 262                         return 0;
 263                 }
 264         }
 265         return -EINVAL;
 266 }
 267
 268 static int vidioc_g_ctrl(struct file *file, void *priv,
 269                                 struct v4l2_control *ctrl)
 270 {
 271         switch (ctrl->id) {
 272         case V4L2_CID_AUDIO_MUTE:
 273                 ctrl->value = curmute;
 274                 return 0;
 275         case V4L2_CID_AUDIO_VOLUME:
 276                 ctrl->value = curvol * 2048;
 277                 return 0;
 278         case V4L2_CID_AUDIO_BASS:
 279                 ctrl->value = curbass * 4370;
 280                 return 0;
 281         case V4L2_CID_AUDIO_TREBLE:
 282                 ctrl->value = curtreble * 4370;
 283                 return 0;
 284         }
 285         return -EINVAL;
 286 }
 287
 288 static int vidioc_s_ctrl(struct file *file, void *priv,
 289                                 struct v4l2_control *ctrl)
 290 {
 291         switch (ctrl->id) {
 292         case V4L2_CID_AUDIO_MUTE:
 293                 tr_setmute(ctrl->value);
 294                 return 0;
 295         case V4L2_CID_AUDIO_VOLUME:
 296                 tr_setvol(ctrl->value);
 297                 return 0;
 298         case V4L2_CID_AUDIO_BASS:
 299                 tr_setbass(ctrl->value);
 300                 return 0;
 301         case V4L2_CID_AUDIO_TREBLE:
 302                 tr_settreble(ctrl->value);
 303                 return 0;
 304         }
 305         return -EINVAL;
 306 }
 307
 308 static int vidioc_g_audio(struct file *file, void *priv,
 309                                 struct v4l2_audio *a)
 310 {
 311         if (a->index > 1)
 312                 return -EINVAL;
 313
 314         strcpy(a->name, "Radio");
 315         a->capability = V4L2_AUDCAP_STEREO;
 316         return 0;
 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         if (i != 0)
 328                 return -EINVAL;
 329         return 0;
 330 }
 331
 332 static int vidioc_s_audio(struct file *file, void *priv,
 333                                 struct v4l2_audio *a)
 334 {
 335         if (a->index != 0)
 336                 return -EINVAL;
 337         return 0;
 338 }
 339
 340 static int trust_exclusive_open(struct inode *inode, struct file *file)
 341 {
 342         return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
 343 }
 344
 345 static int trust_exclusive_release(struct inode *inode, struct file *file)
 346 {
 347         clear_bit(0, &in_use);
 348         return 0;
 349 }
 350
 351 static const struct file_operations trust_fops = {
 352         .owner          = THIS_MODULE,
 353         .open           = trust_exclusive_open,
 354         .release        = trust_exclusive_release,
 355         .ioctl          = video_ioctl2,
 356 #ifdef CONFIG_COMPAT
 357         .compat_ioctl   = v4l_compat_ioctl32,
 358 #endif
 359         .llseek         = no_llseek,
 360 };
 361
 362 static const struct v4l2_ioctl_ops trust_ioctl_ops = {
 363         .vidioc_querycap    = vidioc_querycap,
 364         .vidioc_g_tuner     = vidioc_g_tuner,
 365         .vidioc_s_tuner     = vidioc_s_tuner,
 366         .vidioc_g_frequency = vidioc_g_frequency,
 367         .vidioc_s_frequency = vidioc_s_frequency,
 368         .vidioc_queryctrl   = vidioc_queryctrl,
 369         .vidioc_g_ctrl      = vidioc_g_ctrl,
 370         .vidioc_s_ctrl      = vidioc_s_ctrl,
 371         .vidioc_g_audio     = vidioc_g_audio,
 372         .vidioc_s_audio     = vidioc_s_audio,
 373         .vidioc_g_input     = vidioc_g_input,
 374         .vidioc_s_input     = vidioc_s_input,
 375 };
 376
 377 static struct video_device trust_radio = {
 378         .name           = "Trust FM Radio",
 379         .fops           = &trust_fops,
 380         .ioctl_ops      = &trust_ioctl_ops,
 381 };
 382
 383 static int __init trust_init(void)
 384 {
 385         if(io == -1) {
 386                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
 387                 return -EINVAL;
 388         }
 389         if(!request_region(io, 2, "Trust FM Radio")) {
 390                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
 391                 return -EBUSY;
 392         }
 393         if (video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
 394                 release_region(io, 2);
 395                 return -EINVAL;
 396         }
 397
 398         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
 399
 400         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
 401         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
 402         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
 403         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
 404         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
 405
 406         tr_setvol(0x8000);
 407         tr_setbass(0x8000);
 408         tr_settreble(0x8000);
 409         tr_setstereo(1);
 410
 411         /* mute card - prevents noisy bootups */
 412         tr_setmute(1);
 413
 414         return 0;
 415 }
 416
 417 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
 418 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
 419 MODULE_LICENSE("GPL");
 420
 421 module_param(io, int, 0);
 422 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
 423 module_param(radio_nr, int, 0);
 424
 425 static void __exit cleanup_trust_module(void)
 426 {
 427         video_unregister_device(&trust_radio);
 428         release_region(io, 2);
 429 }
 430
 431 module_init(trust_init);
 432 module_exit(cleanup_trust_module);