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
  82 /* i2c addresses */
  83 #define TDA7318_ADDR 0x88
  84 #define TSA6060T_ADDR 0xc4
  85
  86 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
  87 #define TR_SET_SCL outb(ioval |= 2, io)
  88 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
  89 #define TR_SET_SDA outb(ioval |= 1, io)
  90 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
  91
  92 static void write_i2c(int n, ...)
  93 {
  94         unsigned char val, mask;
  95         va_list args;
  96
  97         va_start(args, n);
  98
  99         /* start condition */
 100         TR_SET_SDA;
 101         TR_SET_SCL;
 102         TR_DELAY;
 103         TR_CLR_SDA;
 104         TR_CLR_SCL;
 105         TR_DELAY;
 106
 107         for(; n; n--) {
 108                 val = va_arg(args, unsigned);
 109                 for(mask = 0x80; mask; mask >>= 1) {
 110                         if(val & mask)
 111                                 TR_SET_SDA;
 112                         else
 113                                 TR_CLR_SDA;
 114                         TR_SET_SCL;
 115                         TR_DELAY;
 116                         TR_CLR_SCL;
 117                         TR_DELAY;
 118                 }
 119                 /* acknowledge bit */
 120                 TR_SET_SDA;
 121                 TR_SET_SCL;
 122                 TR_DELAY;
 123                 TR_CLR_SCL;
 124                 TR_DELAY;
 125         }
 126
 127         /* stop condition */
 128         TR_CLR_SDA;
 129         TR_DELAY;
 130         TR_SET_SCL;
 131         TR_DELAY;
 132         TR_SET_SDA;
 133         TR_DELAY;
 134
 135         va_end(args);
 136 }
 137
 138 static void tr_setvol(__u16 vol)
 139 {
 140         curvol = vol / 2048;
 141         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
 142 }
 143
 144 static int basstreble2chip[15] = {
 145         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
 146 };
 147
 148 static void tr_setbass(__u16 bass)
 149 {
 150         curbass = bass / 4370;
 151         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
 152 }
 153
 154 static void tr_settreble(__u16 treble)
 155 {
 156         curtreble = treble / 4370;
 157         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
 158 }
 159
 160 static void tr_setstereo(int stereo)
 161 {
 162         curstereo = !!stereo;
 163         ioval = (ioval & 0xfb) | (!curstereo << 2);
 164         outb(ioval, io);
 165 }
 166
 167 static void tr_setmute(int mute)
 168 {
 169         curmute = !!mute;
 170         ioval = (ioval & 0xf7) | (curmute << 3);
 171         outb(ioval, io);
 172 }
 173
 174 static int tr_getsigstr(void)
 175 {
 176         int i, v;
 177
 178         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
 179         return (v & 1)? 0 : 0xffff;
 180 }
 181
 182 static int tr_getstereo(void)
 183 {
 184         /* don't know how to determine it, just return the setting */
 185         return curstereo;
 186 }
 187
 188 static void tr_setfreq(unsigned long f)
 189 {
 190         f /= 160;       /* Convert to 10 kHz units      */
 191         f += 1070;      /* Add 10.7 MHz IF                      */
 192
 193         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
 194 }
 195
 196 static int vidioc_querycap(struct file *file, void *priv,
 197                                 struct v4l2_capability *v)
 198 {
 199         strlcpy(v->driver, "radio-trust", sizeof(v->driver));
 200         strlcpy(v->card, "Trust FM Radio", sizeof(v->card));
 201         sprintf(v->bus_info, "ISA");
 202         v->version = RADIO_VERSION;
 203         v->capabilities = V4L2_CAP_TUNER;
 204         return 0;
 205 }
 206
 207 static int vidioc_g_tuner(struct file *file, void *priv,
 208                                 struct v4l2_tuner *v)
 209 {
 210         if (v->index > 0)
 211                 return -EINVAL;
 212
 213         strcpy(v->name, "FM");
 214         v->type = V4L2_TUNER_RADIO;
 215         v->rangelow = (87.5*16000);
 216         v->rangehigh = (108*16000);
 217         v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
 218         v->capability = V4L2_TUNER_CAP_LOW;
 219         if (tr_getstereo())
 220                 v->audmode = V4L2_TUNER_MODE_STEREO;
 221         else
 222                 v->audmode = V4L2_TUNER_MODE_MONO;
 223         v->signal = tr_getsigstr();
 224         return 0;
 225 }
 226
 227 static int vidioc_s_tuner(struct file *file, void *priv,
 228                                 struct v4l2_tuner *v)
 229 {
 230         if (v->index > 0)
 231                 return -EINVAL;
 232
 233         return 0;
 234 }
 235
 236 static int vidioc_s_frequency(struct file *file, void *priv,
 237                                 struct v4l2_frequency *f)
 238 {
 239         curfreq = f->frequency;
 240         tr_setfreq(curfreq);
 241         return 0;
 242 }
 243
 244 static int vidioc_g_frequency(struct file *file, void *priv,
 245                                 struct v4l2_frequency *f)
 246 {
 247         f->type = V4L2_TUNER_RADIO;
 248         f->frequency = curfreq;
 249         return 0;
 250 }
 251
 252 static int vidioc_queryctrl(struct file *file, void *priv,
 253                                 struct v4l2_queryctrl *qc)
 254 {
 255         int i;
 256
 257         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 258                 if (qc->id && qc->id == radio_qctrl[i].id) {
 259                         memcpy(qc, &(radio_qctrl[i]),
 260                                                 sizeof(*qc));
 261                         return 0;
 262                 }
 263         }
 264         return -EINVAL;
 265 }
 266
 267 static int vidioc_g_ctrl(struct file *file, void *priv,
 268                                 struct v4l2_control *ctrl)
 269 {
 270         switch (ctrl->id) {
 271         case V4L2_CID_AUDIO_MUTE:
 272                 ctrl->value = curmute;
 273                 return 0;
 274         case V4L2_CID_AUDIO_VOLUME:
 275                 ctrl->value = curvol * 2048;
 276                 return 0;
 277         case V4L2_CID_AUDIO_BASS:
 278                 ctrl->value = curbass * 4370;
 279                 return 0;
 280         case V4L2_CID_AUDIO_TREBLE:
 281                 ctrl->value = curtreble * 4370;
 282                 return 0;
 283         }
 284         return -EINVAL;
 285 }
 286
 287 static int vidioc_s_ctrl(struct file *file, void *priv,
 288                                 struct v4l2_control *ctrl)
 289 {
 290         switch (ctrl->id) {
 291         case V4L2_CID_AUDIO_MUTE:
 292                 tr_setmute(ctrl->value);
 293                 return 0;
 294         case V4L2_CID_AUDIO_VOLUME:
 295                 tr_setvol(ctrl->value);
 296                 return 0;
 297         case V4L2_CID_AUDIO_BASS:
 298                 tr_setbass(ctrl->value);
 299                 return 0;
 300         case V4L2_CID_AUDIO_TREBLE:
 301                 tr_settreble(ctrl->value);
 302                 return 0;
 303         }
 304         return -EINVAL;
 305 }
 306
 307 static int vidioc_g_audio(struct file *file, void *priv,
 308                                 struct v4l2_audio *a)
 309 {
 310         if (a->index > 1)
 311                 return -EINVAL;
 312
 313         strcpy(a->name, "Radio");
 314         a->capability = V4L2_AUDCAP_STEREO;
 315         return 0;
 316 }
 317
 318 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
 319 {
 320         *i = 0;
 321         return 0;
 322 }
 323
 324 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
 325 {
 326         if (i != 0)
 327                 return -EINVAL;
 328         return 0;
 329 }
 330
 331 static int vidioc_s_audio(struct file *file, void *priv,
 332                                 struct v4l2_audio *a)
 333 {
 334         if (a->index != 0)
 335                 return -EINVAL;
 336         return 0;
 337 }
 338
 339 static const struct file_operations trust_fops = {
 340         .owner          = THIS_MODULE,
 341         .open           = video_exclusive_open,
 342         .release        = video_exclusive_release,
 343         .ioctl          = video_ioctl2,
 344 #ifdef CONFIG_COMPAT
 345         .compat_ioctl   = v4l_compat_ioctl32,
 346 #endif
 347         .llseek         = no_llseek,
 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 struct video_device trust_radio = {
 366         .owner          = THIS_MODULE,
 367         .name           = "Trust FM Radio",
 368         .type           = VID_TYPE_TUNER,
 369         .fops           = &trust_fops,
 370         .ioctl_ops      = &trust_ioctl_ops,
 371 };
 372
 373 static int __init trust_init(void)
 374 {
 375         if(io == -1) {
 376                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
 377                 return -EINVAL;
 378         }
 379         if(!request_region(io, 2, "Trust FM Radio")) {
 380                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
 381                 return -EBUSY;
 382         }
 383         if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1)
 384         {
 385                 release_region(io, 2);
 386                 return -EINVAL;
 387         }
 388
 389         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
 390
 391         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
 392         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
 393         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
 394         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
 395         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
 396
 397         tr_setvol(0x8000);
 398         tr_setbass(0x8000);
 399         tr_settreble(0x8000);
 400         tr_setstereo(1);
 401
 402         /* mute card - prevents noisy bootups */
 403         tr_setmute(1);
 404
 405         return 0;
 406 }
 407
 408 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
 409 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
 410 MODULE_LICENSE("GPL");
 411
 412 module_param(io, int, 0);
 413 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
 414 module_param(radio_nr, int, 0);
 415
 416 static void __exit cleanup_trust_module(void)
 417 {
 418         video_unregister_device(&trust_radio);
 419         release_region(io, 2);
 420 }
 421
 422 module_init(trust_init);
 423 module_exit(cleanup_trust_module);