drivers/media/radio/radio-rtrack2.c

   1 /* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
   2  *
   3  * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
   4  * Converted to new API by Alan Cox <Alan.Cox@linux.org>
   5  * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
   6  *
   7  * TODO: Allow for more than one of these foolish entities :-)
   8  *
   9  * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
  10  */
  11
  12 #include <linux/module.h>       /* Modules                      */
  13 #include <linux/init.h>         /* Initdata                     */
  14 #include <linux/ioport.h>       /* request_region               */
  15 #include <linux/delay.h>        /* udelay                       */
  16 #include <asm/io.h>             /* outb, outb_p                 */
  17 #include <asm/uaccess.h>        /* copy to/from user            */
  18 #include <linux/videodev2.h>    /* kernel radio structs         */
  19 #include <media/v4l2-common.h>
  20 #include <linux/spinlock.h>
  21
  22 #include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
  23 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
  24
  25 static struct v4l2_queryctrl radio_qctrl[] = {
  26         {
  27                 .id            = V4L2_CID_AUDIO_MUTE,
  28                 .name          = "Mute",
  29                 .minimum       = 0,
  30                 .maximum       = 1,
  31                 .default_value = 1,
  32                 .type          = V4L2_CTRL_TYPE_BOOLEAN,
  33         },{
  34                 .id            = V4L2_CID_AUDIO_VOLUME,
  35                 .name          = "Volume",
  36                 .minimum       = 0,
  37                 .maximum       = 65535,
  38                 .step          = 65535,
  39                 .default_value = 0xff,
  40                 .type          = V4L2_CTRL_TYPE_INTEGER,
  41         }
  42 };
  43
  44 #ifndef CONFIG_RADIO_RTRACK2_PORT
  45 #define CONFIG_RADIO_RTRACK2_PORT -1
  46 #endif
  47
  48 static int io = CONFIG_RADIO_RTRACK2_PORT;
  49 static int radio_nr = -1;
  50 static spinlock_t lock;
  51
  52 struct rt_device
  53 {
  54         int port;
  55         unsigned long curfreq;
  56         int muted;
  57 };
  58
  59
  60 /* local things */
  61
  62 static void rt_mute(struct rt_device *dev)
  63 {
  64         if(dev->muted)
  65                 return;
  66         spin_lock(&lock);
  67         outb(1, io);
  68         spin_unlock(&lock);
  69         dev->muted = 1;
  70 }
  71
  72 static void rt_unmute(struct rt_device *dev)
  73 {
  74         if(dev->muted == 0)
  75                 return;
  76         spin_lock(&lock);
  77         outb(0, io);
  78         spin_unlock(&lock);
  79         dev->muted = 0;
  80 }
  81
  82 static void zero(void)
  83 {
  84         outb_p(1, io);
  85         outb_p(3, io);
  86         outb_p(1, io);
  87 }
  88
  89 static void one(void)
  90 {
  91         outb_p(5, io);
  92         outb_p(7, io);
  93         outb_p(5, io);
  94 }
  95
  96 static int rt_setfreq(struct rt_device *dev, unsigned long freq)
  97 {
  98         int i;
  99
 100         freq = freq / 200 + 856;
 101
 102         spin_lock(&lock);
 103
 104         outb_p(0xc8, io);
 105         outb_p(0xc9, io);
 106         outb_p(0xc9, io);
 107
 108         for (i = 0; i < 10; i++)
 109                 zero ();
 110
 111         for (i = 14; i >= 0; i--)
 112                 if (freq & (1 << i))
 113                         one ();
 114                 else
 115                         zero ();
 116
 117         outb_p(0xc8, io);
 118         if (!dev->muted)
 119                 outb_p(0, io);
 120
 121         spin_unlock(&lock);
 122         return 0;
 123 }
 124
 125 static int rt_getsigstr(struct rt_device *dev)
 126 {
 127         if (inb(io) & 2)        /* bit set = no signal present  */
 128                 return 0;
 129         return 1;               /* signal present               */
 130 }
 131
 132 static int rt_do_ioctl(struct inode *inode, struct file *file,
 133                        unsigned int cmd, void *arg)
 134 {
 135         struct video_device *dev = video_devdata(file);
 136         struct rt_device *rt=dev->priv;
 137
 138         switch(cmd)
 139         {
 140                 case VIDIOC_QUERYCAP:
 141                 {
 142                         struct v4l2_capability *v = arg;
 143                         memset(v,0,sizeof(*v));
 144                         strlcpy(v->driver, "radio-rtrack2", sizeof (v->driver));
 145                         strlcpy(v->card, "RadioTrack II", sizeof (v->card));
 146                         sprintf(v->bus_info,"ISA");
 147                         v->version = RADIO_VERSION;
 148                         v->capabilities = V4L2_CAP_TUNER;
 149
 150                         return 0;
 151                 }
 152                 case VIDIOC_G_TUNER:
 153                 {
 154                         struct v4l2_tuner *v = arg;
 155
 156                         if (v->index > 0)
 157                                 return -EINVAL;
 158
 159                         memset(v,0,sizeof(*v));
 160                         strcpy(v->name, "FM");
 161                         v->type = V4L2_TUNER_RADIO;
 162
 163                         v->rangelow=(88*16000);
 164                         v->rangehigh=(108*16000);
 165                         v->rxsubchans =V4L2_TUNER_SUB_MONO;
 166                         v->capability=V4L2_TUNER_CAP_LOW;
 167                         v->audmode = V4L2_TUNER_MODE_MONO;
 168                         v->signal=0xFFFF*rt_getsigstr(rt);
 169
 170                         return 0;
 171                 }
 172                 case VIDIOC_S_TUNER:
 173                 {
 174                         struct v4l2_tuner *v = arg;
 175
 176                         if (v->index > 0)
 177                                 return -EINVAL;
 178
 179                         return 0;
 180                 }
 181                 case VIDIOC_S_FREQUENCY:
 182                 {
 183                         struct v4l2_frequency *f = arg;
 184
 185                         rt->curfreq = f->frequency;
 186                         rt_setfreq(rt, rt->curfreq);
 187                         return 0;
 188                 }
 189                 case VIDIOC_G_FREQUENCY:
 190                 {
 191                         struct v4l2_frequency *f = arg;
 192
 193                         f->type = V4L2_TUNER_RADIO;
 194                         f->frequency = rt->curfreq;
 195
 196                         return 0;
 197                 }
 198                 case VIDIOC_QUERYCTRL:
 199                 {
 200                         struct v4l2_queryctrl *qc = arg;
 201                         int i;
 202
 203                         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
 204                                 if (qc->id && qc->id == radio_qctrl[i].id) {
 205                                         memcpy(qc, &(radio_qctrl[i]),
 206                                                                 sizeof(*qc));
 207                                         return (0);
 208                                 }
 209                         }
 210                         return -EINVAL;
 211                 }
 212                 case VIDIOC_G_CTRL:
 213                 {
 214                         struct v4l2_control *ctrl= arg;
 215
 216                         switch (ctrl->id) {
 217                                 case V4L2_CID_AUDIO_MUTE:
 218                                         ctrl->value=rt->muted;
 219                                         return (0);
 220                                 case V4L2_CID_AUDIO_VOLUME:
 221                                         if (rt->muted)
 222                                                 ctrl->value=0;
 223                                         else
 224                                                 ctrl->value=65535;
 225                                         return (0);
 226                         }
 227                         return -EINVAL;
 228                 }
 229                 case VIDIOC_S_CTRL:
 230                 {
 231                         struct v4l2_control *ctrl= arg;
 232
 233                         switch (ctrl->id) {
 234                                 case V4L2_CID_AUDIO_MUTE:
 235                                         if (ctrl->value) {
 236                                                 rt_mute(rt);
 237                                         } else {
 238                                                 rt_unmute(rt);
 239                                         }
 240                                         return (0);
 241                                 case V4L2_CID_AUDIO_VOLUME:
 242                                         if (ctrl->value) {
 243                                                 rt_unmute(rt);
 244                                         } else {
 245                                                 rt_mute(rt);
 246                                         }
 247                                         return (0);
 248                         }
 249                         return -EINVAL;
 250                 }
 251                 default:
 252                         return v4l_compat_translate_ioctl(inode,file,cmd,arg,
 253                                                           rt_do_ioctl);
 254         }
 255 }
 256
 257 static int rt_ioctl(struct inode *inode, struct file *file,
 258                     unsigned int cmd, unsigned long arg)
 259 {
 260         return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
 261 }
 262
 263 static struct rt_device rtrack2_unit;
 264
 265 static const struct file_operations rtrack2_fops = {
 266         .owner          = THIS_MODULE,
 267         .open           = video_exclusive_open,
 268         .release        = video_exclusive_release,
 269         .ioctl          = rt_ioctl,
 270         .compat_ioctl   = v4l_compat_ioctl32,
 271         .llseek         = no_llseek,
 272 };
 273
 274 static struct video_device rtrack2_radio=
 275 {
 276         .owner          = THIS_MODULE,
 277         .name           = "RadioTrack II radio",
 278         .type           = VID_TYPE_TUNER,
 279         .hardware       = 0,
 280         .fops           = &rtrack2_fops,
 281 };
 282
 283 static int __init rtrack2_init(void)
 284 {
 285         if(io==-1)
 286         {
 287                 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
 288                 return -EINVAL;
 289         }
 290         if (!request_region(io, 4, "rtrack2"))
 291         {
 292                 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
 293                 return -EBUSY;
 294         }
 295
 296         rtrack2_radio.priv=&rtrack2_unit;
 297
 298         spin_lock_init(&lock);
 299         if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
 300         {
 301                 release_region(io, 4);
 302                 return -EINVAL;
 303         }
 304
 305         printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
 306
 307         /* mute card - prevents noisy bootups */
 308         outb(1, io);
 309         rtrack2_unit.muted = 1;
 310
 311         return 0;
 312 }
 313
 314 MODULE_AUTHOR("Ben Pfaff");
 315 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
 316 MODULE_LICENSE("GPL");
 317
 318 module_param(io, int, 0);
 319 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
 320 module_param(radio_nr, int, 0);
 321
 322 static void __exit rtrack2_cleanup_module(void)
 323 {
 324         video_unregister_device(&rtrack2_radio);
 325         release_region(io,4);
 326 }
 327
 328 module_init(rtrack2_init);
 329 module_exit(rtrack2_cleanup_module);
 330
 331 /*
 332   Local variables:
 333   compile-command: "mmake"
 334   End:
 335 */