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/version.h> /* for KERNEL_VERSION MACRO */ 19 #include <linux/io.h> /* outb, outb_p */ 20 #include <media/v4l2-device.h> 21 #include <media/v4l2-ioctl.h> 22 23 MODULE_AUTHOR("Ben Pfaff"); 24 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card."); 25 MODULE_LICENSE("GPL"); 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 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2) 39 40 struct rtrack2 41 { 42 struct v4l2_device v4l2_dev; 43 struct video_device vdev; 44 int io; 45 unsigned long curfreq; 46 int muted; 47 struct mutex lock; 48 }; 49 50 static struct rtrack2 rtrack2_card; 51 52 53 /* local things */ 54 55 static void rt_mute(struct rtrack2 *dev) 56 { 57 if (dev->muted) 58 return; 59 mutex_lock(&dev->lock); 60 outb(1, dev->io); 61 mutex_unlock(&dev->lock); 62 dev->muted = 1; 63 } 64 65 static void rt_unmute(struct rtrack2 *dev) 66 { 67 if(dev->muted == 0) 68 return; 69 mutex_lock(&dev->lock); 70 outb(0, dev->io); 71 mutex_unlock(&dev->lock); 72 dev->muted = 0; 73 } 74 75 static void zero(struct rtrack2 *dev) 76 { 77 outb_p(1, dev->io); 78 outb_p(3, dev->io); 79 outb_p(1, dev->io); 80 } 81 82 static void one(struct rtrack2 *dev) 83 { 84 outb_p(5, dev->io); 85 outb_p(7, dev->io); 86 outb_p(5, dev->io); 87 } 88 89 static int rt_setfreq(struct rtrack2 *dev, unsigned long freq) 90 { 91 int i; 92 93 mutex_lock(&dev->lock); 94 dev->curfreq = freq; 95 freq = freq / 200 + 856; 96 97 outb_p(0xc8, dev->io); 98 outb_p(0xc9, dev->io); 99 outb_p(0xc9, dev->io); 100 101 for (i = 0; i < 10; i++) 102 zero(dev); 103 104 for (i = 14; i >= 0; i--) 105 if (freq & (1 << i)) 106 one(dev); 107 else 108 zero(dev); 109 110 outb_p(0xc8, dev->io); 111 if (!dev->muted) 112 outb_p(0, dev->io); 113 114 mutex_unlock(&dev->lock); 115 return 0; 116 } 117 118 static int vidioc_querycap(struct file *file, void *priv, 119 struct v4l2_capability *v) 120 { 121 strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver)); 122 strlcpy(v->card, "RadioTrack II", sizeof(v->card)); 123 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info)); 124 v->version = RADIO_VERSION; 125 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO; 126 return 0; 127 } 128 129 static int vidioc_s_tuner(struct file *file, void *priv, 130 struct v4l2_tuner *v) 131 { 132 return v->index ? -EINVAL : 0; 133 } 134 135 static int rt_getsigstr(struct rtrack2 *dev) 136 { 137 int sig = 1; 138 139 mutex_lock(&dev->lock); 140 if (inb(dev->io) & 2) /* bit set = no signal present */ 141 sig = 0; 142 mutex_unlock(&dev->lock); 143 return sig; 144 } 145 146 static int vidioc_g_tuner(struct file *file, void *priv, 147 struct v4l2_tuner *v) 148 { 149 struct rtrack2 *rt = video_drvdata(file); 150 151 if (v->index > 0) 152 return -EINVAL; 153 154 strlcpy(v->name, "FM", sizeof(v->name)); 155 v->type = V4L2_TUNER_RADIO; 156 v->rangelow = 88 * 16000; 157 v->rangehigh = 108 * 16000; 158 v->rxsubchans = V4L2_TUNER_SUB_MONO; 159 v->capability = V4L2_TUNER_CAP_LOW; 160 v->audmode = V4L2_TUNER_MODE_MONO; 161 v->signal = 0xFFFF * rt_getsigstr(rt); 162 return 0; 163 } 164 165 static int vidioc_s_frequency(struct file *file, void *priv, 166 struct v4l2_frequency *f) 167 { 168 struct rtrack2 *rt = video_drvdata(file); 169 170 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO) 171 return -EINVAL; 172 rt_setfreq(rt, f->frequency); 173 return 0; 174 } 175 176 static int vidioc_g_frequency(struct file *file, void *priv, 177 struct v4l2_frequency *f) 178 { 179 struct rtrack2 *rt = video_drvdata(file); 180 181 if (f->tuner != 0) 182 return -EINVAL; 183 f->type = V4L2_TUNER_RADIO; 184 f->frequency = rt->curfreq; 185 return 0; 186 } 187 188 static int vidioc_queryctrl(struct file *file, void *priv, 189 struct v4l2_queryctrl *qc) 190 { 191 switch (qc->id) { 192 case V4L2_CID_AUDIO_MUTE: 193 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1); 194 case V4L2_CID_AUDIO_VOLUME: 195 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535); 196 } 197 return -EINVAL; 198 } 199 200 static int vidioc_g_ctrl(struct file *file, void *priv, 201 struct v4l2_control *ctrl) 202 { 203 struct rtrack2 *rt = video_drvdata(file); 204 205 switch (ctrl->id) { 206 case V4L2_CID_AUDIO_MUTE: 207 ctrl->value = rt->muted; 208 return 0; 209 case V4L2_CID_AUDIO_VOLUME: 210 if (rt->muted) 211 ctrl->value = 0; 212 else 213 ctrl->value = 65535; 214 return 0; 215 } 216 return -EINVAL; 217 } 218 219 static int vidioc_s_ctrl(struct file *file, void *priv, 220 struct v4l2_control *ctrl) 221 { 222 struct rtrack2 *rt = video_drvdata(file); 223 224 switch (ctrl->id) { 225 case V4L2_CID_AUDIO_MUTE: 226 if (ctrl->value) 227 rt_mute(rt); 228 else 229 rt_unmute(rt); 230 return 0; 231 case V4L2_CID_AUDIO_VOLUME: 232 if (ctrl->value) 233 rt_unmute(rt); 234 else 235 rt_mute(rt); 236 return 0; 237 } 238 return -EINVAL; 239 } 240 241 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) 242 { 243 *i = 0; 244 return 0; 245 } 246 247 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) 248 { 249 return i ? -EINVAL : 0; 250 } 251 252 static int vidioc_g_audio(struct file *file, void *priv, 253 struct v4l2_audio *a) 254 { 255 a->index = 0; 256 strlcpy(a->name, "Radio", sizeof(a->name)); 257 a->capability = V4L2_AUDCAP_STEREO; 258 return 0; 259 } 260 261 static int vidioc_s_audio(struct file *file, void *priv, 262 struct v4l2_audio *a) 263 { 264 return a->index ? -EINVAL : 0; 265 } 266 267 static const struct v4l2_file_operations rtrack2_fops = { 268 .owner = THIS_MODULE, 269 .unlocked_ioctl = video_ioctl2, 270 }; 271 272 static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = { 273 .vidioc_querycap = vidioc_querycap, 274 .vidioc_g_tuner = vidioc_g_tuner, 275 .vidioc_s_tuner = vidioc_s_tuner, 276 .vidioc_g_frequency = vidioc_g_frequency, 277 .vidioc_s_frequency = vidioc_s_frequency, 278 .vidioc_queryctrl = vidioc_queryctrl, 279 .vidioc_g_ctrl = vidioc_g_ctrl, 280 .vidioc_s_ctrl = vidioc_s_ctrl, 281 .vidioc_g_audio = vidioc_g_audio, 282 .vidioc_s_audio = vidioc_s_audio, 283 .vidioc_g_input = vidioc_g_input, 284 .vidioc_s_input = vidioc_s_input, 285 }; 286 287 static int __init rtrack2_init(void) 288 { 289 struct rtrack2 *dev = &rtrack2_card; 290 struct v4l2_device *v4l2_dev = &dev->v4l2_dev; 291 int res; 292 293 strlcpy(v4l2_dev->name, "rtrack2", sizeof(v4l2_dev->name)); 294 dev->io = io; 295 if (dev->io == -1) { 296 v4l2_err(v4l2_dev, "You must set an I/O address with io=0x20c or io=0x30c\n"); 297 return -EINVAL; 298 } 299 if (!request_region(dev->io, 4, "rtrack2")) { 300 v4l2_err(v4l2_dev, "port 0x%x already in use\n", dev->io); 301 return -EBUSY; 302 } 303 304 res = v4l2_device_register(NULL, v4l2_dev); 305 if (res < 0) { 306 release_region(dev->io, 4); 307 v4l2_err(v4l2_dev, "Could not register v4l2_device\n"); 308 return res; 309 } 310 311 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name)); 312 dev->vdev.v4l2_dev = v4l2_dev; 313 dev->vdev.fops = &rtrack2_fops; 314 dev->vdev.ioctl_ops = &rtrack2_ioctl_ops; 315 dev->vdev.release = video_device_release_empty; 316 video_set_drvdata(&dev->vdev, dev); 317 318 /* mute card - prevents noisy bootups */ 319 outb(1, dev->io); 320 dev->muted = 1; 321 322 mutex_init(&dev->lock); 323 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) { 324 v4l2_device_unregister(v4l2_dev); 325 release_region(dev->io, 4); 326 return -EINVAL; 327 } 328 329 v4l2_info(v4l2_dev, "AIMSlab Radiotrack II card driver.\n"); 330 331 return 0; 332 } 333 334 static void __exit rtrack2_exit(void) 335 { 336 struct rtrack2 *dev = &rtrack2_card; 337 338 video_unregister_device(&dev->vdev); 339 v4l2_device_unregister(&dev->v4l2_dev); 340 release_region(dev->io, 4); 341 } 342 343 module_init(rtrack2_init); 344 module_exit(rtrack2_exit); 345