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Diffstat (limited to 'drivers/usb/media/dsbr100.c')
-rw-r--r--drivers/usb/media/dsbr100.c429
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diff --git a/drivers/usb/media/dsbr100.c b/drivers/usb/media/dsbr100.c
deleted file mode 100644
index 25646804d5be..000000000000
--- a/drivers/usb/media/dsbr100.c
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1/* A driver for the D-Link DSB-R100 USB radio. The R100 plugs
2 into both the USB and an analog audio input, so this thing
3 only deals with initialisation and frequency setting, the
4 audio data has to be handled by a sound driver.
5
6 Major issue: I can't find out where the device reports the signal
7 strength, and indeed the windows software appearantly just looks
8 at the stereo indicator as well. So, scanning will only find
9 stereo stations. Sad, but I can't help it.
10
11 Also, the windows program sends oodles of messages over to the
12 device, and I couldn't figure out their meaning. My suspicion
13 is that they don't have any:-)
14
15 You might find some interesting stuff about this module at
16 http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
17
18 Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
19
20 This program is free software; you can redistribute it and/or modify
21 it under the terms of the GNU General Public License as published by
22 the Free Software Foundation; either version 2 of the License, or
23 (at your option) any later version.
24
25 This program is distributed in the hope that it will be useful,
26 but WITHOUT ANY WARRANTY; without even the implied warranty of
27 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 GNU General Public License for more details.
29
30 You should have received a copy of the GNU General Public License
31 along with this program; if not, write to the Free Software
32 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33
34 History:
35
36 Version 0.40:
37 Markus: Updates for 2.6.x kernels, code layout changes, name sanitizing
38
39 Version 0.30:
40 Markus: Updates for 2.5.x kernel and more ISO compliant source
41
42 Version 0.25:
43 PSL and Markus: Cleanup, radio now doesn't stop on device close
44
45 Version 0.24:
46 Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
47 right. Some minor cleanup, improved standalone compilation
48
49 Version 0.23:
50 Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
51
52 Version 0.22:
53 Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
54 thanks to Mike Cox for pointing the problem out.
55
56 Version 0.21:
57 Markus: Minor cleanup, warnings if something goes wrong, lame attempt
58 to adhere to Documentation/CodingStyle
59
60 Version 0.2:
61 Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
62 Markus: Copyright clarification
63
64 Version 0.01: Markus: initial release
65
66*/
67
68
69#include <linux/kernel.h>
70#include <linux/module.h>
71#include <linux/init.h>
72#include <linux/slab.h>
73#include <linux/input.h>
74#include <linux/videodev.h>
75#include <linux/usb.h>
76#include <linux/smp_lock.h>
77
78/*
79 * Version Information
80 */
81#define DRIVER_VERSION "v0.40"
82#define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
83#define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
84
85#define DSB100_VENDOR 0x04b4
86#define DSB100_PRODUCT 0x1002
87
88/* Commands the device appears to understand */
89#define DSB100_TUNE 1
90#define DSB100_ONOFF 2
91
92#define TB_LEN 16
93
94/* Frequency limits in MHz -- these are European values. For Japanese
95devices, that would be 76 and 91. */
96#define FREQ_MIN 87.5
97#define FREQ_MAX 108.0
98#define FREQ_MUL 16000
99
100
101static int usb_dsbr100_probe(struct usb_interface *intf,
102 const struct usb_device_id *id);
103static void usb_dsbr100_disconnect(struct usb_interface *intf);
104static int usb_dsbr100_ioctl(struct inode *inode, struct file *file,
105 unsigned int cmd, unsigned long arg);
106static int usb_dsbr100_open(struct inode *inode, struct file *file);
107static int usb_dsbr100_close(struct inode *inode, struct file *file);
108
109static int radio_nr = -1;
110module_param(radio_nr, int, 0);
111
112/* Data for one (physical) device */
113typedef struct {
114 struct usb_device *usbdev;
115 struct video_device *videodev;
116 unsigned char transfer_buffer[TB_LEN];
117 int curfreq;
118 int stereo;
119 int users;
120 int removed;
121} dsbr100_device;
122
123
124/* File system interface */
125static struct file_operations usb_dsbr100_fops = {
126 .owner = THIS_MODULE,
127 .open = usb_dsbr100_open,
128 .release = usb_dsbr100_close,
129 .ioctl = usb_dsbr100_ioctl,
130 .compat_ioctl = v4l_compat_ioctl32,
131 .llseek = no_llseek,
132};
133
134/* V4L interface */
135static struct video_device dsbr100_videodev_template=
136{
137 .owner = THIS_MODULE,
138 .name = "D-Link DSB-R 100",
139 .type = VID_TYPE_TUNER,
140 .hardware = VID_HARDWARE_AZTECH,
141 .fops = &usb_dsbr100_fops,
142 .release = video_device_release,
143};
144
145static struct usb_device_id usb_dsbr100_device_table [] = {
146 { USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
147 { } /* Terminating entry */
148};
149
150MODULE_DEVICE_TABLE (usb, usb_dsbr100_device_table);
151
152/* USB subsystem interface */
153static struct usb_driver usb_dsbr100_driver = {
154 .name = "dsbr100",
155 .probe = usb_dsbr100_probe,
156 .disconnect = usb_dsbr100_disconnect,
157 .id_table = usb_dsbr100_device_table,
158};
159
160/* Low-level device interface begins here */
161
162/* switch on radio */
163static int dsbr100_start(dsbr100_device *radio)
164{
165 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
166 USB_REQ_GET_STATUS,
167 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
168 0x00, 0xC7, radio->transfer_buffer, 8, 300)<0 ||
169 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
170 DSB100_ONOFF,
171 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
172 0x01, 0x00, radio->transfer_buffer, 8, 300)<0)
173 return -1;
174 return (radio->transfer_buffer)[0];
175}
176
177
178/* switch off radio */
179static int dsbr100_stop(dsbr100_device *radio)
180{
181 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
182 USB_REQ_GET_STATUS,
183 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
184 0x16, 0x1C, radio->transfer_buffer, 8, 300)<0 ||
185 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
186 DSB100_ONOFF,
187 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
188 0x00, 0x00, radio->transfer_buffer, 8, 300)<0)
189 return -1;
190 return (radio->transfer_buffer)[0];
191}
192
193/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
194static int dsbr100_setfreq(dsbr100_device *radio, int freq)
195{
196 freq = (freq/16*80)/1000+856;
197 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
198 DSB100_TUNE,
199 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
200 (freq>>8)&0x00ff, freq&0xff,
201 radio->transfer_buffer, 8, 300)<0 ||
202 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
203 USB_REQ_GET_STATUS,
204 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
205 0x96, 0xB7, radio->transfer_buffer, 8, 300)<0 ||
206 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
207 USB_REQ_GET_STATUS,
208 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
209 0x00, 0x24, radio->transfer_buffer, 8, 300)<0) {
210 radio->stereo = -1;
211 return -1;
212 }
213 radio->stereo = ! ((radio->transfer_buffer)[0]&0x01);
214 return (radio->transfer_buffer)[0];
215}
216
217/* return the device status. This is, in effect, just whether it
218sees a stereo signal or not. Pity. */
219static void dsbr100_getstat(dsbr100_device *radio)
220{
221 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
222 USB_REQ_GET_STATUS,
223 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
224 0x00 , 0x24, radio->transfer_buffer, 8, 300)<0)
225 radio->stereo = -1;
226 else
227 radio->stereo = ! (radio->transfer_buffer[0]&0x01);
228}
229
230
231/* USB subsystem interface begins here */
232
233/* check if the device is present and register with v4l and
234usb if it is */
235static int usb_dsbr100_probe(struct usb_interface *intf,
236 const struct usb_device_id *id)
237{
238 dsbr100_device *radio;
239
240 if (!(radio = kmalloc(sizeof(dsbr100_device), GFP_KERNEL)))
241 return -ENOMEM;
242 if (!(radio->videodev = video_device_alloc())) {
243 kfree(radio);
244 return -ENOMEM;
245 }
246 memcpy(radio->videodev, &dsbr100_videodev_template,
247 sizeof(dsbr100_videodev_template));
248 radio->removed = 0;
249 radio->users = 0;
250 radio->usbdev = interface_to_usbdev(intf);
251 radio->curfreq = FREQ_MIN*FREQ_MUL;
252 video_set_drvdata(radio->videodev, radio);
253 if (video_register_device(radio->videodev, VFL_TYPE_RADIO,
254 radio_nr)) {
255 warn("Could not register video device");
256 video_device_release(radio->videodev);
257 kfree(radio);
258 return -EIO;
259 }
260 usb_set_intfdata(intf, radio);
261 return 0;
262}
263
264/* handle unplugging of the device, release data structures
265if nothing keeps us from doing it. If something is still
266keeping us busy, the release callback of v4l will take care
267of releasing it. stv680.c does not relase its private
268data, so I don't do this here either. Checking out the
269code I'd expect I better did that, but if there's a memory
270leak here it's tiny (~50 bytes per disconnect) */
271static void usb_dsbr100_disconnect(struct usb_interface *intf)
272{
273 dsbr100_device *radio = usb_get_intfdata(intf);
274
275 usb_set_intfdata (intf, NULL);
276 if (radio) {
277 video_unregister_device(radio->videodev);
278 radio->videodev = NULL;
279 if (radio->users) {
280 kfree(radio);
281 } else {
282 radio->removed = 1;
283 }
284 }
285}
286
287
288/* Video for Linux interface */
289
290static int usb_dsbr100_do_ioctl(struct inode *inode, struct file *file,
291 unsigned int cmd, void *arg)
292{
293 dsbr100_device *radio=video_get_drvdata(video_devdata(file));
294
295 if (!radio)
296 return -EIO;
297
298 switch(cmd) {
299 case VIDIOCGCAP: {
300 struct video_capability *v = arg;
301
302 memset(v, 0, sizeof(*v));
303 v->type = VID_TYPE_TUNER;
304 v->channels = 1;
305 v->audios = 1;
306 strcpy(v->name, "D-Link R-100 USB FM Radio");
307 return 0;
308 }
309 case VIDIOCGTUNER: {
310 struct video_tuner *v = arg;
311
312 dsbr100_getstat(radio);
313 if(v->tuner) /* Only 1 tuner */
314 return -EINVAL;
315 v->rangelow = FREQ_MIN*FREQ_MUL;
316 v->rangehigh = FREQ_MAX*FREQ_MUL;
317 v->flags = VIDEO_TUNER_LOW;
318 v->mode = VIDEO_MODE_AUTO;
319 v->signal = radio->stereo*0x7000;
320 /* Don't know how to get signal strength */
321 v->flags |= VIDEO_TUNER_STEREO_ON*radio->stereo;
322 strcpy(v->name, "DSB R-100");
323 return 0;
324 }
325 case VIDIOCSTUNER: {
326 struct video_tuner *v = arg;
327
328 if(v->tuner!=0)
329 return -EINVAL;
330 /* Only 1 tuner so no setting needed ! */
331 return 0;
332 }
333 case VIDIOCGFREQ: {
334 int *freq = arg;
335
336 if (radio->curfreq==-1)
337 return -EINVAL;
338 *freq = radio->curfreq;
339 return 0;
340 }
341 case VIDIOCSFREQ: {
342 int *freq = arg;
343
344 radio->curfreq = *freq;
345 if (dsbr100_setfreq(radio, radio->curfreq)==-1)
346 warn("Set frequency failed");
347 return 0;
348 }
349 case VIDIOCGAUDIO: {
350 struct video_audio *v = arg;
351
352 memset(v, 0, sizeof(*v));
353 v->flags |= VIDEO_AUDIO_MUTABLE;
354 v->mode = VIDEO_SOUND_STEREO;
355 v->volume = 1;
356 v->step = 1;
357 strcpy(v->name, "Radio");
358 return 0;
359 }
360 case VIDIOCSAUDIO: {
361 struct video_audio *v = arg;
362
363 if (v->audio)
364 return -EINVAL;
365 if (v->flags&VIDEO_AUDIO_MUTE) {
366 if (dsbr100_stop(radio)==-1)
367 warn("Radio did not respond properly");
368 }
369 else
370 if (dsbr100_start(radio)==-1)
371 warn("Radio did not respond properly");
372 return 0;
373 }
374 default:
375 return -ENOIOCTLCMD;
376 }
377}
378
379static int usb_dsbr100_ioctl(struct inode *inode, struct file *file,
380 unsigned int cmd, unsigned long arg)
381{
382 return video_usercopy(inode, file, cmd, arg, usb_dsbr100_do_ioctl);
383}
384
385static int usb_dsbr100_open(struct inode *inode, struct file *file)
386{
387 dsbr100_device *radio=video_get_drvdata(video_devdata(file));
388
389 radio->users = 1;
390 if (dsbr100_start(radio)<0) {
391 warn("Radio did not start up properly");
392 radio->users = 0;
393 return -EIO;
394 }
395 dsbr100_setfreq(radio, radio->curfreq);
396 return 0;
397}
398
399static int usb_dsbr100_close(struct inode *inode, struct file *file)
400{
401 dsbr100_device *radio=video_get_drvdata(video_devdata(file));
402
403 if (!radio)
404 return -ENODEV;
405 radio->users = 0;
406 if (radio->removed) {
407 kfree(radio);
408 }
409 return 0;
410}
411
412static int __init dsbr100_init(void)
413{
414 int retval = usb_register(&usb_dsbr100_driver);
415 info(DRIVER_VERSION ":" DRIVER_DESC);
416 return retval;
417}
418
419static void __exit dsbr100_exit(void)
420{
421 usb_deregister(&usb_dsbr100_driver);
422}
423
424module_init (dsbr100_init);
425module_exit (dsbr100_exit);
426
427MODULE_AUTHOR( DRIVER_AUTHOR );
428MODULE_DESCRIPTION( DRIVER_DESC );
429MODULE_LICENSE("GPL");
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