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
  27 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
  28 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
  29
  30 static struct v4l2_queryctrl radio_qctrl[] = {
  31         {
  32                 .id            = V4L2_CID_AUDIO_MUTE,
  33                 .name          = "Mute",
  34                 .minimum       = 0,
  35                 .maximum       = 1,
  36                 .default_value = 1,
  37                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
  38         },{
  39                 .id            = V4L2_CID_AUDIO_VOLUME,
  40                 .name          = "Volume",
  41                 .minimum       = 0,
  42                 .maximum       = 65535,
  43                 .step          = 2048,
  44                 .default_value = 65535,
  45                 .type          = V4L2_CTRL_TYPE_INTEGER,
  46         },{
  47                 .id            = V4L2_CID_AUDIO_BASS,
  48                 .name          = "Bass",
  49                 .minimum       = 0,
  50                 .maximum       = 65535,
  51                 .step          = 4370,
  52                 .default_value = 32768,
  53                 .type          = V4L2_CTRL_TYPE_INTEGER,
  54         },{
  55                 .id            = V4L2_CID_AUDIO_TREBLE,
  56                 .name          = "Treble",
  57                 .minimum       = 0,
  58                 .maximum       = 65535,
  59                 .step          = 4370,
  60                 .default_value = 32768,
  61                 .type          = V4L2_CTRL_TYPE_INTEGER,
  62         },
  63 };
  64
  65 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
  66
  67 #ifndef CONFIG_RADIO_TRUST_PORT
  68 #define CONFIG_RADIO_TRUST_PORT -1
  69 #endif
  70
  71 static int io = CONFIG_RADIO_TRUST_PORT;
  72 static int radio_nr = -1;
  73 static int ioval = 0xf;
  74 static __u16 curvol;
  75 static __u16 curbass;
  76 static __u16 curtreble;
  77 static unsigned long curfreq;
  78 static int curstereo;
  79 static int curmute;
  80
  81 /* i2c addresses */
  82 #define TDA7318_ADDR 0x88
  83 #define TSA6060T_ADDR 0xc4
  84
  85 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
  86 #define TR_SET_SCL outb(ioval |= 2, io)
  87 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
  88 #define TR_SET_SDA outb(ioval |= 1, io)
  89 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
  90
  91 static void write_i2c(int n, ...)
  92 {
  93         unsigned char val, mask;
  94         va_list args;
  95
  96         va_start(args, n);
  97
  98         /* start condition */
  99         TR_SET_SDA;
 100         TR_SET_SCL;
 101         TR_DELAY;
 102         TR_CLR_SDA;
 103         TR_CLR_SCL;
 104         TR_DELAY;
 105
 106         for(; n; n--) {
 107                 val = va_arg(args, unsigned);
 108                 for(mask = 0x80; mask; mask >>= 1) {
 109                         if(val & mask)
 110                                 TR_SET_SDA;
 111                         else
 112                                 TR_CLR_SDA;
 113                         TR_SET_SCL;
 114                         TR_DELAY;
 115                         TR_CLR_SCL;
 116                         TR_DELAY;
 117                 }
 118                 /* acknowledge bit */
 119                 TR_SET_SDA;
 120                 TR_SET_SCL;
 121                 TR_DELAY;
 122                 TR_CLR_SCL;
 123                 TR_DELAY;
 124         }
 125
 126         /* stop condition */
 127         TR_CLR_SDA;
 128         TR_DELAY;
 129         TR_SET_SCL;
 130         TR_DELAY;
 131         TR_SET_SDA;
 132         TR_DELAY;
 133
 134         va_end(args);
 135 }
 136
 137 static void tr_setvol(__u16 vol)
 138 {
 139         curvol = vol / 2048;
 140         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
 141 }
 142
 143 static int basstreble2chip[15] = {
 144         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
 145 };
 146
 147 static void tr_setbass(__u16 bass)
 148 {
 149         curbass = bass / 4370;
 150         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
 151 }
 152
 153 static void tr_settreble(__u16 treble)
 154 {
 155         curtreble = treble / 4370;
 156         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
 157 }
 158
 159 static void tr_setstereo(int stereo)
 160 {
 161         curstereo = !!stereo;
 162         ioval = (ioval & 0xfb) | (!curstereo << 2);
 163         outb(ioval, io);
 164 }
 165
 166 static void tr_setmute(int mute)
 167 {
 168         curmute = !!mute;
 169         ioval = (ioval & 0xf7) | (curmute << 3);
 170         outb(ioval, io);
 171 }
 172
 173 static int tr_getsigstr(void)
 174 {
 175         int i, v;
 176
 177         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
 178         return (v & 1)? 0 : 0xffff;
 179 }
 180
 181 static int tr_getstereo(void)
 182 {
 183         /* don't know how to determine it, just return the setting */
 184         return curstereo;
 185 }
 186
 187 static void tr_setfreq(unsigned long f)
 188 {
 189         f /= 160;       /* Convert to 10 kHz units      */
 190         f += 1070;      /* Add 10.7 MHz IF                      */
 191
 192         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
 193 }
 194
 195 static int tr_do_ioctl(struct inode *inode, struct file *file,
 196                        unsigned int cmd, void *arg)
 197 {
 198         switch(cmd)
 199         {
 200                 case VIDIOC_QUERYCAP:
 201                 {
 202                         struct v4l2_capability *v = arg;
 203                         memset(v,0,sizeof(*v));
 204                         strlcpy(v->driver, "radio-trust", sizeof (v->driver));
 205                         strlcpy(v->card, "Trust FM Radio", sizeof (v->card));
 206                         sprintf(v->bus_info,"ISA");
 207                         v->version = RADIO_VERSION;
 208                         v->capabilities = V4L2_CAP_TUNER;
 209
 210                         return 0;
 211                 }
 212                 case VIDIOC_G_TUNER:
 213                 {
 214                         struct v4l2_tuner *v = arg;
 215
 216                         if (v->index > 0)
 217                                 return -EINVAL;
 218
 219                         memset(v,0,sizeof(*v));
 220                         strcpy(v->name, "FM");
 221                         v->type = V4L2_TUNER_RADIO;
 222
 223                         v->rangelow=(87.5*16000);
 224                         v->rangehigh=(108*16000);
 225                         v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
 226                         v->capability=V4L2_TUNER_CAP_LOW;
 227                         if(tr_getstereo())
 228                                 v->audmode = V4L2_TUNER_MODE_STEREO;
 229                         else
 230                                 v->audmode = V4L2_TUNER_MODE_MONO;
 231                         v->signal=tr_getsigstr();
 232
 233                         return 0;
 234                 }
 235                 case VIDIOC_S_TUNER:
 236                 {
 237                         struct v4l2_tuner *v = arg;
 238
 239                         if (v->index > 0)
 240                                 return -EINVAL;
 241
 242                         return 0;
 243                 }
 244                 case VIDIOC_S_FREQUENCY:
 245                 {
 246                         struct v4l2_frequency *f = arg;
 247
 248                         curfreq = f->frequency;
 249                         tr_setfreq(curfreq);
 250                         return 0;
 251                 }
 252                 case VIDIOC_G_FREQUENCY:
 253                 {
 254                         struct v4l2_frequency *f = arg;
 255
 256                         f->type = V4L2_TUNER_RADIO;
 257                         f->frequency = curfreq;
 258
 259                         return 0;
 260                 }
 261                 case VIDIOC_QUERYCTRL:
 262                 {
 263                         struct v4l2_queryctrl *qc = arg;
 264                         int i;
 265
 266                         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 267                                 if (qc->id && qc->id == radio_qctrl[i].id) {
 268                                         memcpy(qc, &(radio_qctrl[i]),
 269                                                                 sizeof(*qc));
 270                                         return (0);
 271                                 }
 272                         }
 273                         return -EINVAL;
 274                 }
 275                 case VIDIOC_G_CTRL:
 276                 {
 277                         struct v4l2_control *ctrl= arg;
 278
 279                         switch (ctrl->id) {
 280                                 case V4L2_CID_AUDIO_MUTE:
 281                                         ctrl->value=curmute;
 282                                         return (0);
 283                                 case V4L2_CID_AUDIO_VOLUME:
 284                                         ctrl->value= curvol * 2048;
 285                                         return (0);
 286                                 case V4L2_CID_AUDIO_BASS:
 287                                         ctrl->value= curbass * 4370;
 288                                         return (0);
 289                                 case V4L2_CID_AUDIO_TREBLE:
 290                                         ctrl->value= curtreble * 4370;
 291                                         return (0);
 292                         }
 293                         return -EINVAL;
 294                 }
 295                 case VIDIOC_S_CTRL:
 296                 {
 297                         struct v4l2_control *ctrl= arg;
 298
 299                         switch (ctrl->id) {
 300                                 case V4L2_CID_AUDIO_MUTE:
 301                                         tr_setmute(ctrl->value);
 302                                         return 0;
 303                                 case V4L2_CID_AUDIO_VOLUME:
 304                                         tr_setvol(ctrl->value);
 305                                         return 0;
 306                                 case V4L2_CID_AUDIO_BASS:
 307                                         tr_setbass(ctrl->value);
 308                                         return 0;
 309                                 case V4L2_CID_AUDIO_TREBLE:
 310                                         tr_settreble(ctrl->value);
 311                                         return (0);
 312                         }
 313                         return -EINVAL;
 314                 }
 315
 316                 default:
 317                         return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 318                                                           tr_do_ioctl);
 319         }
 320 }
 321
 322 static int tr_ioctl(struct inode *inode, struct file *file,
 323                     unsigned int cmd, unsigned long arg)
 324 {
 325         return video_usercopy(inode, file, cmd, arg, tr_do_ioctl);
 326 }
 327
 328 static const struct file_operations trust_fops = {
 329         .owner          = THIS_MODULE,
 330         .open           = video_exclusive_open,
 331         .release        = video_exclusive_release,
 332         .ioctl          = tr_ioctl,
 333         .compat_ioctl   = v4l_compat_ioctl32,
 334         .llseek         = no_llseek,
 335 };
 336
 337 static struct video_device trust_radio=
 338 {
 339         .owner          = THIS_MODULE,
 340         .name           = "Trust FM Radio",
 341         .type           = VID_TYPE_TUNER,
 342         .hardware       = 0,
 343         .fops           = &trust_fops,
 344 };
 345
 346 static int __init trust_init(void)
 347 {
 348         if(io == -1) {
 349                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
 350                 return -EINVAL;
 351         }
 352         if(!request_region(io, 2, "Trust FM Radio")) {
 353                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
 354                 return -EBUSY;
 355         }
 356         if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1)
 357         {
 358                 release_region(io, 2);
 359                 return -EINVAL;
 360         }
 361
 362         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
 363
 364         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
 365         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
 366         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
 367         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
 368         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
 369
 370         tr_setvol(0x8000);
 371         tr_setbass(0x8000);
 372         tr_settreble(0x8000);
 373         tr_setstereo(1);
 374
 375         /* mute card - prevents noisy bootups */
 376         tr_setmute(1);
 377
 378         return 0;
 379 }
 380
 381 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
 382 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
 383 MODULE_LICENSE("GPL");
 384
 385 module_param(io, int, 0);
 386 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
 387 module_param(radio_nr, int, 0);
 388
 389 static void __exit cleanup_trust_module(void)
 390 {
 391         video_unregister_device(&trust_radio);
 392         release_region(io, 2);
 393 }
 394
 395 module_init(trust_init);
 396 module_exit(cleanup_trust_module);