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@lxorguk.ukuu.org.uk> 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 <linux/videodev2.h> /* kernel radio structs */ 17 #include <linux/mutex.h> 18 #include <linux/io.h> /* outb, outb_p */ 19 #include <media/v4l2-device.h> 20 #include <media/v4l2-ioctl.h> 21 22 MODULE_AUTHOR("Ben Pfaff"); 23 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); 24 MODULE_LICENSE("GPL"); 25 MODULE_VERSION("0.0.3"); 26 27 #ifndef CONFIG_RADIO_RTRACK2_PORT 28 #define CONFIG_RADIO_RTRACK2_PORT -1 29 #endif 30 31 static int io = CONFIG_RADIO_RTRACK2_PORT; 32 static int radio_nr = -1; 33 34 module_param(io, int, 0); 35 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)"); 36 module_param(radio_nr, int, 0); 37 38 struct rtrack2 39 { 40 struct v4l2_device v4l2_dev; 41 struct video_device vdev; 42 int io; 43 unsigned long curfreq; 44 int muted; 45 struct mutex lock; 46 }; 47 48 static struct rtrack2 rtrack2_card; 49 50 51 /* local things */ 52 53 static void rt_mute(struct rtrack2 *dev) 54 { 55 if (dev->muted) 56 return; 57 mutex_lock(&dev->lock); 58 outb(1, dev->io); 59 mutex_unlock(&dev->lock); 60 dev->muted = 1; 61 } 62 63 static void rt_unmute(struct rtrack2 *dev) 64 { 65 if(dev->muted == 0) 66 return; 67 mutex_lock(&dev->lock); 68 outb(0, dev->io); 69 mutex_unlock(&dev->lock); 70 dev->muted = 0; 71 } 72 73 static void zero(struct rtrack2 *dev) 74 { 75 outb_p(1, dev->io); 76 outb_p(3, dev->io); 77 outb_p(1, dev->io); 78 } 79 80 static void one(struct rtrack2 *dev) 81 { 82 outb_p(5, dev->io); 83 outb_p(7, dev->io); 84 outb_p(5, dev->io); 85 } 86 87 static int rt_setfreq(struct rtrack2 *dev, unsigned long freq) 88 { 89 int i; 90 91 mutex_lock(&dev->lock); 92 dev->curfreq = freq; 93 freq = freq / 200 + 856; 94 95 outb_p(0xc8, dev->io); 96 outb_p(0xc9, dev->io); 97 outb_p(0xc9, dev->io); 98 99 for (i = 0; i < 10; i++) 100 zero(dev); 101 102 for (i = 14; i >= 0; i--) 103 if (freq & (1 << i)) 104 one(dev); 105 else 106 zero(dev); 107 108 outb_p(0xc8, dev->io); 109 if (!dev->muted) 110 outb_p(0, dev->io); 111 112 mutex_unlock(&dev->lock); 113 return 0; 114 } 115 116 static int vidioc_querycap(struct file *file, void *priv, 117 struct v4l2_capability *v) 118 { 119 strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver)); 120 strlcpy(v->card, "RadioTrack II", sizeof(v->card)); 121 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 122 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 123 return 0; 124 } 125 126 static int vidioc_s_tuner(struct file *file, void *priv, 127 struct v4l2_tuner *v) 128 { 129 return v->index ? -EINVAL : 0; 130 } 131 132 static int rt_getsigstr(struct rtrack2 *dev) 133 { 134 int sig = 1; 135 136 mutex_lock(&dev->lock); 137 if (inb(dev->io) & 2) /* bit set = no signal present */ 138 sig = 0; 139 mutex_unlock(&dev->lock); 140 return sig; 141 } 142 143 static int vidioc_g_tuner(struct file *file, void *priv, 144 struct v4l2_tuner *v) 145 { 146 struct rtrack2 *rt = video_drvdata(file); 147 148 if (v->index > 0) 149 return -EINVAL; 150 151 strlcpy(v->name, "FM", sizeof(v->name)); 152 v->type = V4L2_TUNER_RADIO; 153 v->rangelow = 88 * 16000; 154 v->rangehigh = 108 * 16000; 155 v->rxsubchans = V4L2_TUNER_SUB_MONO; 156 v->capability = V4L2_TUNER_CAP_LOW; 157 v->audmode = V4L2_TUNER_MODE_MONO; 158 v->signal = 0xFFFF * rt_getsigstr(rt); 159 return 0; 160 } 161 162 static int vidioc_s_frequency(struct file *file, void *priv, 163 struct v4l2_frequency *f) 164 { 165 struct rtrack2 *rt = video_drvdata(file); 166 167 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 168 return -EINVAL; 169 rt_setfreq(rt, f->frequency); 170 return 0; 171 } 172 173 static int vidioc_g_frequency(struct file *file, void *priv, 174 struct v4l2_frequency *f) 175 { 176 struct rtrack2 *rt = video_drvdata(file); 177 178 if (f->tuner != 0) 179 return -EINVAL; 180 f->type = V4L2_TUNER_RADIO; 181 f->frequency = rt->curfreq; 182 return 0; 183 } 184 185 static int vidioc_queryctrl(struct file *file, void *priv, 186 struct v4l2_queryctrl *qc) 187 { 188 switch (qc->id) { 189 case V4L2_CID_AUDIO_MUTE: 190 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 191 case V4L2_CID_AUDIO_VOLUME: 192 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535); 193 } 194 return -EINVAL; 195 } 196 197 static int vidioc_g_ctrl(struct file *file, void *priv, 198 struct v4l2_control *ctrl) 199 { 200 struct rtrack2 *rt = video_drvdata(file); 201 202 switch (ctrl->id) { 203 case V4L2_CID_AUDIO_MUTE: 204 ctrl->value = rt->muted; 205 return 0; 206 case V4L2_CID_AUDIO_VOLUME: 207 if (rt->muted) 208 ctrl->value = 0; 209 else 210 ctrl->value = 65535; 211 return 0; 212 } 213 return -EINVAL; 214 } 215 216 static int vidioc_s_ctrl(struct file *file, void *priv, 217 struct v4l2_control *ctrl) 218 { 219 struct rtrack2 *rt = video_drvdata(file); 220 221 switch (ctrl->id) { 222 case V4L2_CID_AUDIO_MUTE: 223 if (ctrl->value) 224 rt_mute(rt); 225 else 226 rt_unmute(rt); 227 return 0; 228 case V4L2_CID_AUDIO_VOLUME: 229 if (ctrl->value) 230 rt_unmute(rt); 231 else 232 rt_mute(rt); 233 return 0; 234 } 235 return -EINVAL; 236 } 237 238 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 239 { 240 *i = 0; 241 return 0; 242 } 243 244 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 245 { 246 return i ? -EINVAL : 0; 247 } 248 249 static int vidioc_g_audio(struct file *file, void *priv, 250 struct v4l2_audio *a) 251 { 252 a->index = 0; 253 strlcpy(a->name, "Radio", sizeof(a->name)); 254 a->capability = V4L2_AUDCAP_STEREO; 255 return 0; 256 } 257 258 static int vidioc_s_audio(struct file *file, void *priv, 259 struct v4l2_audio *a) 260 { 261 return a->index ? -EINVAL : 0; 262 } 263 264 static const struct v4l2_file_operations rtrack2_fops = { 265 .owner = THIS_MODULE, 266 .unlocked_ioctl = video_ioctl2, 267 }; 268 269 static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = { 270 .vidioc_querycap = vidioc_querycap, 271 .vidioc_g_tuner = vidioc_g_tuner, 272 .vidioc_s_tuner = vidioc_s_tuner, 273 .vidioc_g_frequency = vidioc_g_frequency, 274 .vidioc_s_frequency = vidioc_s_frequency, 275 .vidioc_queryctrl = vidioc_queryctrl, 276 .vidioc_g_ctrl = vidioc_g_ctrl, 277 .vidioc_s_ctrl = vidioc_s_ctrl, 278 .vidioc_g_audio = vidioc_g_audio, 279 .vidioc_s_audio = vidioc_s_audio, 280 .vidioc_g_input = vidioc_g_input, 281 .vidioc_s_input = vidioc_s_input, 282 }; 283 284 static int __init rtrack2_init(void) 285 { 286 struct rtrack2 *dev = &rtrack2_card; 287 struct v4l2_device *v4l2_dev = &dev->v4l2_dev; 288 int res; 289 290 strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name)); 291 dev->io = io; 292 if (dev->io == -1) { 293 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n"); 294 return -EINVAL; 295 } 296 if (!request_region(dev->io, 4, "rtrack2")) { 297 v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io); 298 return -EBUSY; 299 } 300 301 res = v4l2_device_register(NULL, v4l2_dev); 302 if (res < 0) { 303 release_region(dev->io, 4); 304 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 305 return res; 306 } 307 308 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); 309 dev->vdev.v4l2_dev = v4l2_dev; 310 dev->vdev.fops = &rtrack2_fops; 311 dev->vdev.ioctl_ops = &rtrack2_ioctl_ops; 312 dev->vdev.release = video_device_release_empty; 313 video_set_drvdata(&dev->vdev, dev); 314 315 /* mute card - prevents noisy bootups */ 316 outb(1, dev->io); 317 dev->muted = 1; 318 319 mutex_init(&dev->lock); 320 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 321 v4l2_device_unregister(v4l2_dev); 322 release_region(dev->io, 4); 323 return -EINVAL; 324 } 325 326 v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n"); 327 328 return 0; 329 } 330 331 static void __exit rtrack2_exit(void) 332 { 333 struct rtrack2 *dev = &rtrack2_card; 334 335 video_unregister_device(&dev->vdev); 336 v4l2_device_unregister(&dev->v4l2_dev); 337 release_region(dev->io, 4); 338 } 339 340 module_init(rtrack2_init); 341 module_exit(rtrack2_exit); 342