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 */ 336