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 <media/v4l2-ioctl.h> 21 #include <linux/spinlock.h> 22 23 #include <linux/version.h> /* for KERNEL_VERSION MACRO */ 24 #define RADIO_VERSION KERNEL_VERSION(0,0,2) 25 26 static struct v4l2_queryctrl radio_qctrl[] = { 27 { 28 .id = V4L2_CID_AUDIO_MUTE, 29 .name = "Mute", 30 .minimum = 0, 31 .maximum = 1, 32 .default_value = 1, 33 .type = V4L2_CTRL_TYPE_BOOLEAN, 34 },{ 35 .id = V4L2_CID_AUDIO_VOLUME, 36 .name = "Volume", 37 .minimum = 0, 38 .maximum = 65535, 39 .step = 65535, 40 .default_value = 0xff, 41 .type = V4L2_CTRL_TYPE_INTEGER, 42 } 43 }; 44 45 #ifndef CONFIG_RADIO_RTRACK2_PORT 46 #define CONFIG_RADIO_RTRACK2_PORT -1 47 #endif 48 49 static int io = CONFIG_RADIO_RTRACK2_PORT; 50 static int radio_nr = -1; 51 static spinlock_t lock; 52 53 struct rt_device 54 { 55 int port; 56 unsigned long curfreq; 57 int muted; 58 }; 59 60 61 /* local things */ 62 63 static void rt_mute(struct rt_device *dev) 64 { 65 if(dev->muted) 66 return; 67 spin_lock(&lock); 68 outb(1, io); 69 spin_unlock(&lock); 70 dev->muted = 1; 71 } 72 73 static void rt_unmute(struct rt_device *dev) 74 { 75 if(dev->muted == 0) 76 return; 77 spin_lock(&lock); 78 outb(0, io); 79 spin_unlock(&lock); 80 dev->muted = 0; 81 } 82 83 static void zero(void) 84 { 85 outb_p(1, io); 86 outb_p(3, io); 87 outb_p(1, io); 88 } 89 90 static void one(void) 91 { 92 outb_p(5, io); 93 outb_p(7, io); 94 outb_p(5, io); 95 } 96 97 static int rt_setfreq(struct rt_device *dev, unsigned long freq) 98 { 99 int i; 100 101 freq = freq / 200 + 856; 102 103 spin_lock(&lock); 104 105 outb_p(0xc8, io); 106 outb_p(0xc9, io); 107 outb_p(0xc9, io); 108 109 for (i = 0; i < 10; i++) 110 zero (); 111 112 for (i = 14; i >= 0; i--) 113 if (freq & (1 << i)) 114 one (); 115 else 116 zero (); 117 118 outb_p(0xc8, io); 119 if (!dev->muted) 120 outb_p(0, io); 121 122 spin_unlock(&lock); 123 return 0; 124 } 125 126 static int vidioc_querycap(struct file *file, void *priv, 127 struct v4l2_capability *v) 128 { 129 strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver)); 130 strlcpy(v->card, "RadioTrack II", sizeof(v->card)); 131 sprintf(v->bus_info, "ISA"); 132 v->version = RADIO_VERSION; 133 v->capabilities = V4L2_CAP_TUNER; 134 return 0; 135 } 136 137 static int vidioc_s_tuner(struct file *file, void *priv, 138 struct v4l2_tuner *v) 139 { 140 if (v->index > 0) 141 return -EINVAL; 142 143 return 0; 144 } 145 146 static int rt_getsigstr(struct rt_device *dev) 147 { 148 if (inb(io) & 2) /* bit set = no signal present */ 149 return 0; 150 return 1; /* signal present */ 151 } 152 153 static int vidioc_g_tuner(struct file *file, void *priv, 154 struct v4l2_tuner *v) 155 { 156 struct video_device *dev = video_devdata(file); 157 struct rt_device *rt = dev->priv; 158 159 if (v->index > 0) 160 return -EINVAL; 161 162 strcpy(v->name, "FM"); 163 v->type = V4L2_TUNER_RADIO; 164 v->rangelow = (88*16000); 165 v->rangehigh = (108*16000); 166 v->rxsubchans = V4L2_TUNER_SUB_MONO; 167 v->capability = V4L2_TUNER_CAP_LOW; 168 v->audmode = V4L2_TUNER_MODE_MONO; 169 v->signal = 0xFFFF*rt_getsigstr(rt); 170 return 0; 171 } 172 173 static int vidioc_s_frequency(struct file *file, void *priv, 174 struct v4l2_frequency *f) 175 { 176 struct video_device *dev = video_devdata(file); 177 struct rt_device *rt = dev->priv; 178 179 rt->curfreq = f->frequency; 180 rt_setfreq(rt, rt->curfreq); 181 return 0; 182 } 183 184 static int vidioc_g_frequency(struct file *file, void *priv, 185 struct v4l2_frequency *f) 186 { 187 struct video_device *dev = video_devdata(file); 188 struct rt_device *rt = dev->priv; 189 190 f->type = V4L2_TUNER_RADIO; 191 f->frequency = rt->curfreq; 192 return 0; 193 } 194 195 static int vidioc_queryctrl(struct file *file, void *priv, 196 struct v4l2_queryctrl *qc) 197 { 198 int i; 199 200 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { 201 if (qc->id && qc->id == radio_qctrl[i].id) { 202 memcpy(qc, &(radio_qctrl[i]), 203 sizeof(*qc)); 204 return 0; 205 } 206 } 207 return -EINVAL; 208 } 209 210 static int vidioc_g_ctrl(struct file *file, void *priv, 211 struct v4l2_control *ctrl) 212 { 213 struct video_device *dev = video_devdata(file); 214 struct rt_device *rt = dev->priv; 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 } 229 230 static int vidioc_s_ctrl(struct file *file, void *priv, 231 struct v4l2_control *ctrl) 232 { 233 struct video_device *dev = video_devdata(file); 234 struct rt_device *rt = dev->priv; 235 236 switch (ctrl->id) { 237 case V4L2_CID_AUDIO_MUTE: 238 if (ctrl->value) 239 rt_mute(rt); 240 else 241 rt_unmute(rt); 242 return 0; 243 case V4L2_CID_AUDIO_VOLUME: 244 if (ctrl->value) 245 rt_unmute(rt); 246 else 247 rt_mute(rt); 248 return 0; 249 } 250 return -EINVAL; 251 } 252 253 static int vidioc_g_audio(struct file *file, void *priv, 254 struct v4l2_audio *a) 255 { 256 if (a->index > 1) 257 return -EINVAL; 258 259 strcpy(a->name, "Radio"); 260 a->capability = V4L2_AUDCAP_STEREO; 261 return 0; 262 } 263 264 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 265 { 266 *i = 0; 267 return 0; 268 } 269 270 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 271 { 272 if (i != 0) 273 return -EINVAL; 274 return 0; 275 } 276 277 static int vidioc_s_audio(struct file *file, void *priv, 278 struct v4l2_audio *a) 279 { 280 if (a->index != 0) 281 return -EINVAL; 282 return 0; 283 } 284 285 static struct rt_device rtrack2_unit; 286 287 static const struct file_operations rtrack2_fops = { 288 .owner = THIS_MODULE, 289 .open = video_exclusive_open, 290 .release = video_exclusive_release, 291 .ioctl = video_ioctl2, 292 #ifdef CONFIG_COMPAT 293 .compat_ioctl = v4l_compat_ioctl32, 294 #endif 295 .llseek = no_llseek, 296 }; 297 298 static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = { 299 .vidioc_querycap = vidioc_querycap, 300 .vidioc_g_tuner = vidioc_g_tuner, 301 .vidioc_s_tuner = vidioc_s_tuner, 302 .vidioc_g_frequency = vidioc_g_frequency, 303 .vidioc_s_frequency = vidioc_s_frequency, 304 .vidioc_queryctrl = vidioc_queryctrl, 305 .vidioc_g_ctrl = vidioc_g_ctrl, 306 .vidioc_s_ctrl = vidioc_s_ctrl, 307 .vidioc_g_audio = vidioc_g_audio, 308 .vidioc_s_audio = vidioc_s_audio, 309 .vidioc_g_input = vidioc_g_input, 310 .vidioc_s_input = vidioc_s_input, 311 }; 312 313 static struct video_device rtrack2_radio = { 314 .name = "RadioTrack II radio", 315 .fops = &rtrack2_fops, 316 .ioctl_ops = &rtrack2_ioctl_ops, 317 }; 318 319 static int __init rtrack2_init(void) 320 { 321 if(io==-1) 322 { 323 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n"); 324 return -EINVAL; 325 } 326 if (!request_region(io, 4, "rtrack2")) 327 { 328 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io); 329 return -EBUSY; 330 } 331 332 rtrack2_radio.priv=&rtrack2_unit; 333 334 spin_lock_init(&lock); 335 if (video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr) < 0) { 336 release_region(io, 4); 337 return -EINVAL; 338 } 339 340 printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n"); 341 342 /* mute card - prevents noisy bootups */ 343 outb(1, io); 344 rtrack2_unit.muted = 1; 345 346 return 0; 347 } 348 349 MODULE_AUTHOR("Ben Pfaff"); 350 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); 351 MODULE_LICENSE("GPL"); 352 353 module_param(io, int, 0); 354 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); 355 module_param(radio_nr, int, 0); 356 357 static void __exit rtrack2_cleanup_module(void) 358 { 359 video_unregister_device(&rtrack2_radio); 360 release_region(io,4); 361 } 362 363 module_init(rtrack2_init); 364 module_exit(rtrack2_cleanup_module); 365 366 /* 367 Local variables: 368 compile-command: "mmake" 369 End: 370 */ 371