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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 | /* A driver for the D-Link DSB-R100 USB radio. The R100 plugs
into both the USB and an analog audio input, so this thing
only deals with initialisation and frequency setting, the
audio data has to be handled by a sound driver.
Major issue: I can't find out where the device reports the signal
strength, and indeed the windows software appearantly just looks
at the stereo indicator as well. So, scanning will only find
stereo stations. Sad, but I can't help it.
Also, the windows program sends oodles of messages over to the
device, and I couldn't figure out their meaning. My suspicion
is that they don't have any:-)
You might find some interesting stuff about this module at
http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
Copyright (c) 2000 Markus Demleitner <msdemlei@tucana.harvard.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
History:
Version 0.24:
Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
right. Some minor cleanup, improved standalone compilation
Version 0.23:
Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
Version 0.22:
Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
thanks to Mike Cox for pointing the problem out.
Version 0.21:
Markus: Minor cleanup, warnings if something goes wrong, lame attempt
to adhere to Documentation/CodingStyle
Version 0.2:
Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
Markus: Copyright clarification
Version 0.01: Markus: initial release
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/malloc.h>
#include <linux/input.h>
#include <linux/videodev.h>
#include <linux/usb.h>
#define DSB100_VENDOR 0x04b4
#define DSB100_PRODUCT 0x1002
#define TB_LEN 16
static void *usb_dsbr100_probe(struct usb_device *dev, unsigned int ifnum);
static void usb_dsbr100_disconnect(struct usb_device *dev, void *ptr);
static int usb_dsbr100_ioctl(struct video_device *dev, unsigned int cmd,
void *arg);
static int usb_dsbr100_open(struct video_device *dev, int flags);
static void usb_dsbr100_close(struct video_device *dev);
typedef struct
{ struct urb readurb,writeurb;
struct usb_device *dev;
unsigned char transfer_buffer[TB_LEN];
int curfreq;
int stereo;
int ifnum;
} usb_dsbr100;
static struct video_device usb_dsbr100_radio=
{
"D-Link DSB R-100 USB radio",
VID_TYPE_TUNER,
VID_HARDWARE_AZTECH,
usb_dsbr100_open,
usb_dsbr100_close,
NULL, /* Can't read (no capture ability) */
NULL, /* Can't write */
NULL, /* No poll */
usb_dsbr100_ioctl,
NULL,
NULL
};
static int users = 0;
static struct usb_driver usb_dsbr100_driver = {
name: "dsbr100",
probe: usb_dsbr100_probe,
disconnect: usb_dsbr100_disconnect,
driver_list: {NULL,NULL},
fops: NULL,
minor: 0
};
static int dsbr100_start(usb_dsbr100 *radio)
{
if (usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x00, 0xC0, 0x00, 0xC7, radio->transfer_buffer, 8, 300)<0 ||
usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x02, 0xC0, 0x01, 0x00, radio->transfer_buffer, 8, 300)<0)
return -1;
return (radio->transfer_buffer)[0];
}
static int dsbr100_stop(usb_dsbr100 *radio)
{
if (usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x00, 0xC0, 0x16, 0x1C, radio->transfer_buffer, 8, 300)<0 ||
usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x02, 0xC0, 0x00, 0x00, radio->transfer_buffer, 8, 300)<0)
return -1;
return (radio->transfer_buffer)[0];
}
static int dsbr100_setfreq(usb_dsbr100 *radio, int freq)
{
freq = (freq/16*80)/1000+856;
if (usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x01, 0xC0, (freq>>8)&0x00ff, freq&0xff,
radio->transfer_buffer, 8, 300)<0 ||
usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x00, 0xC0, 0x96, 0xB7, radio->transfer_buffer, 8, 300)<0 ||
usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x00, 0xC0, 0x00, 0x24, radio->transfer_buffer, 8, 300)<0) {
radio->stereo = -1;
return -1;
}
radio->stereo = ! ((radio->transfer_buffer)[0]&0x01);
return (radio->transfer_buffer)[0];
}
static void dsbr100_getstat(usb_dsbr100 *radio)
{
if (usb_control_msg(radio->dev, usb_rcvctrlpipe(radio->dev, 0),
0x00, 0xC0, 0x00 , 0x24, radio->transfer_buffer, 8, 300)<0)
radio->stereo = -1;
else
radio->stereo = ! (radio->transfer_buffer[0]&0x01);
}
static void *usb_dsbr100_probe(struct usb_device *dev, unsigned int ifnum)
{
usb_dsbr100 *radio;
if (dev->descriptor.idVendor!=DSB100_VENDOR ||
dev->descriptor.idProduct!=DSB100_PRODUCT)
return NULL;
if (!(radio = kmalloc(sizeof(usb_dsbr100),GFP_KERNEL)))
return NULL;
usb_dsbr100_radio.priv = radio;
radio->dev = dev;
radio->ifnum = ifnum;
radio->curfreq = 1454000;
return (void*)radio;
}
static void usb_dsbr100_disconnect(struct usb_device *dev, void *ptr)
{
usb_dsbr100 *radio=ptr;
if (users)
return;
kfree(radio);
usb_dsbr100_radio.priv = NULL;
}
static int usb_dsbr100_ioctl(struct video_device *dev, unsigned int cmd,
void *arg)
{
usb_dsbr100 *radio=dev->priv;
if (!radio)
return -EINVAL;
switch(cmd)
{
case VIDIOCGCAP: {
struct video_capability v;
v.type=VID_TYPE_TUNER;
v.channels=1;
v.audios=1;
/* No we don't do pictures */
v.maxwidth=0;
v.maxheight=0;
v.minwidth=0;
v.minheight=0;
strcpy(v.name, "D-Link R-100 USB Radio");
if(copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCGTUNER: {
struct video_tuner v;
dsbr100_getstat(radio);
if(copy_from_user(&v, arg,sizeof(v))!=0)
return -EFAULT;
if(v.tuner) /* Only 1 tuner */
return -EINVAL;
v.rangelow = 87*16000;
v.rangehigh = 108*16000;
v.flags = VIDEO_TUNER_LOW;
v.mode = VIDEO_MODE_AUTO;
v.signal = radio->stereo*0x7000;
/* Don't know how to get signal strength */
v.flags |= VIDEO_TUNER_STEREO_ON*radio->stereo;
strcpy(v.name, "DSB R-100");
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSTUNER: {
struct video_tuner v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.tuner!=0)
return -EINVAL;
/* Only 1 tuner so no setting needed ! */
return 0;
}
case VIDIOCGFREQ:
if (radio->curfreq==-1)
return -EINVAL;
if(copy_to_user(arg, &(radio->curfreq),
sizeof(radio->curfreq)))
return -EFAULT;
return 0;
case VIDIOCSFREQ:
if(copy_from_user(&(radio->curfreq), arg,
sizeof(radio->curfreq)))
return -EFAULT;
if (dsbr100_setfreq(radio, radio->curfreq)==-1)
warn("set frequency failed");
return 0;
case VIDIOCGAUDIO: {
struct video_audio v;
memset(&v,0, sizeof(v));
v.flags|=VIDEO_AUDIO_MUTABLE;
v.mode=VIDEO_SOUND_STEREO;
v.volume=1;
v.step=1;
strcpy(v.name, "Radio");
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSAUDIO: {
struct video_audio v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.audio)
return -EINVAL;
if(v.flags&VIDEO_AUDIO_MUTE) {
if (dsbr100_stop(radio)==-1)
warn("radio did not respond properly");
}
else
if (dsbr100_start(radio)==-1)
warn("radio did not respond properly");
return 0;
}
default:
return -ENOIOCTLCMD;
}
}
static int usb_dsbr100_open(struct video_device *dev, int flags)
{
usb_dsbr100 *radio=dev->priv;
if (! radio) {
warn("radio not initialised");
return -EAGAIN;
}
if(users)
{
warn("radio in use");
return -EBUSY;
}
users++;
MOD_INC_USE_COUNT;
if (dsbr100_start(radio)<0)
warn("radio did not start up properly");
dsbr100_setfreq(radio,radio->curfreq);
return 0;
}
static void usb_dsbr100_close(struct video_device *dev)
{
usb_dsbr100 *radio=dev->priv;
if (!radio)
return;
users--;
dsbr100_stop(radio);
MOD_DEC_USE_COUNT;
}
static int __init dsbr100_init(void)
{
usb_dsbr100_radio.priv = NULL;
usb_register(&usb_dsbr100_driver);
if (video_register_device(&usb_dsbr100_radio,VFL_TYPE_RADIO)==-1) {
warn("couldn't register video device");
return -EINVAL;
}
return 0;
}
static void __exit dsbr100_exit(void)
{
usb_dsbr100 *radio=usb_dsbr100_radio.priv;
if (radio)
dsbr100_stop(radio);
video_unregister_device(&usb_dsbr100_radio);
usb_deregister(&usb_dsbr100_driver);
}
module_init (dsbr100_init);
module_exit (dsbr100_exit);
MODULE_AUTHOR("Markus Demleitner <msdemlei@tucana.harvard.edu>");
MODULE_DESCRIPTION("D-Link DSB-R100 USB radio driver");
/*
vi: ts=8
Sigh. Of course, I am one of the ts=2 heretics, but Linus' wish is
my command.
*/
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