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.
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.
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:-)
15 You might find some interesting stuff about this module at
16 http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
18 Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
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.
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.
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
37 Oliver Neukum: avoided DMA coherency issue
40 Converted dsbr100 to use video_ioctl2
41 by Douglas Landgraf <dougsland@gmail.com>
44 Alan Cox: Some cleanups and fixes
47 Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
50 Markus: Updates for 2.6.x kernels, code layout changes, name sanitizing
53 Markus: Updates for 2.5.x kernel and more ISO compliant source
56 PSL and Markus: Cleanup, radio now doesn't stop on device close
59 Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
60 right. Some minor cleanup, improved standalone compilation
63 Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
66 Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
67 thanks to Mike Cox for pointing the problem out.
70 Markus: Minor cleanup, warnings if something goes wrong, lame attempt
71 to adhere to Documentation/CodingStyle
74 Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
75 Markus: Copyright clarification
77 Version 0.01: Markus: initial release
81 #include <linux/kernel.h>
82 #include <linux/module.h>
83 #include <linux/init.h>
84 #include <linux/slab.h>
85 #include <linux/input.h>
86 #include <linux/videodev2.h>
87 #include <media/v4l2-common.h>
88 #include <linux/usb.h>
93 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
95 #define DRIVER_VERSION "v0.41"
96 #define RADIO_VERSION KERNEL_VERSION(0,4,1)
98 static struct v4l2_queryctrl radio_qctrl[] = {
100 .id = V4L2_CID_AUDIO_MUTE,
105 .type = V4L2_CTRL_TYPE_BOOLEAN,
109 #define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
110 #define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
112 #define DSB100_VENDOR 0x04b4
113 #define DSB100_PRODUCT 0x1002
115 /* Commands the device appears to understand */
116 #define DSB100_TUNE 1
117 #define DSB100_ONOFF 2
121 /* Frequency limits in MHz -- these are European values. For Japanese
122 devices, that would be 76 and 91. */
123 #define FREQ_MIN 87.5
124 #define FREQ_MAX 108.0
125 #define FREQ_MUL 16000
128 static int usb_dsbr100_probe(struct usb_interface *intf,
129 const struct usb_device_id *id);
130 static void usb_dsbr100_disconnect(struct usb_interface *intf);
131 static int usb_dsbr100_open(struct inode *inode, struct file *file);
132 static int usb_dsbr100_close(struct inode *inode, struct file *file);
134 static int radio_nr = -1;
135 module_param(radio_nr, int, 0);
137 /* Data for one (physical) device */
138 struct dsbr100_device {
139 struct usb_device *usbdev;
140 struct video_device *videodev;
150 static struct usb_device_id usb_dsbr100_device_table [] = {
151 { USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
152 { } /* Terminating entry */
155 MODULE_DEVICE_TABLE (usb, usb_dsbr100_device_table);
157 /* USB subsystem interface */
158 static struct usb_driver usb_dsbr100_driver = {
160 .probe = usb_dsbr100_probe,
161 .disconnect = usb_dsbr100_disconnect,
162 .id_table = usb_dsbr100_device_table,
165 /* Low-level device interface begins here */
167 /* switch on radio */
168 static int dsbr100_start(struct dsbr100_device *radio)
170 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
172 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
173 0x00, 0xC7, radio->transfer_buffer, 8, 300)<0 ||
174 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
176 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
177 0x01, 0x00, radio->transfer_buffer, 8, 300)<0)
180 return (radio->transfer_buffer)[0];
184 /* switch off radio */
185 static int dsbr100_stop(struct dsbr100_device *radio)
187 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
189 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
190 0x16, 0x1C, radio->transfer_buffer, 8, 300)<0 ||
191 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
193 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
194 0x00, 0x00, radio->transfer_buffer, 8, 300)<0)
197 return (radio->transfer_buffer)[0];
200 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
201 static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
203 freq = (freq/16*80)/1000+856;
204 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
206 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
207 (freq>>8)&0x00ff, freq&0xff,
208 radio->transfer_buffer, 8, 300)<0 ||
209 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
211 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
212 0x96, 0xB7, radio->transfer_buffer, 8, 300)<0 ||
213 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
215 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
216 0x00, 0x24, radio->transfer_buffer, 8, 300)<0) {
220 radio->stereo = ! ((radio->transfer_buffer)[0]&0x01);
221 return (radio->transfer_buffer)[0];
224 /* return the device status. This is, in effect, just whether it
225 sees a stereo signal or not. Pity. */
226 static void dsbr100_getstat(struct dsbr100_device *radio)
228 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
230 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
231 0x00 , 0x24, radio->transfer_buffer, 8, 300)<0)
234 radio->stereo = ! (radio->transfer_buffer[0]&0x01);
238 /* USB subsystem interface begins here */
240 /* handle unplugging of the device, release data structures
241 if nothing keeps us from doing it. If something is still
242 keeping us busy, the release callback of v4l will take care
244 static void usb_dsbr100_disconnect(struct usb_interface *intf)
246 struct dsbr100_device *radio = usb_get_intfdata(intf);
248 usb_set_intfdata (intf, NULL);
250 video_unregister_device(radio->videodev);
251 radio->videodev = NULL;
253 kfree(radio->transfer_buffer);
262 static int vidioc_querycap(struct file *file, void *priv,
263 struct v4l2_capability *v)
265 strlcpy(v->driver, "dsbr100", sizeof(v->driver));
266 strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
267 sprintf(v->bus_info, "ISA");
268 v->version = RADIO_VERSION;
269 v->capabilities = V4L2_CAP_TUNER;
273 static int vidioc_g_tuner(struct file *file, void *priv,
274 struct v4l2_tuner *v)
276 struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
281 dsbr100_getstat(radio);
282 strcpy(v->name, "FM");
283 v->type = V4L2_TUNER_RADIO;
284 v->rangelow = FREQ_MIN*FREQ_MUL;
285 v->rangehigh = FREQ_MAX*FREQ_MUL;
286 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
287 v->capability = V4L2_TUNER_CAP_LOW;
289 v->audmode = V4L2_TUNER_MODE_STEREO;
291 v->audmode = V4L2_TUNER_MODE_MONO;
292 v->signal = 0xffff; /* We can't get the signal strength */
296 static int vidioc_s_tuner(struct file *file, void *priv,
297 struct v4l2_tuner *v)
305 static int vidioc_s_frequency(struct file *file, void *priv,
306 struct v4l2_frequency *f)
308 struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
310 radio->curfreq = f->frequency;
311 if (dsbr100_setfreq(radio, radio->curfreq)==-1)
312 warn("Set frequency failed");
316 static int vidioc_g_frequency(struct file *file, void *priv,
317 struct v4l2_frequency *f)
319 struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
321 f->type = V4L2_TUNER_RADIO;
322 f->frequency = radio->curfreq;
326 static int vidioc_queryctrl(struct file *file, void *priv,
327 struct v4l2_queryctrl *qc)
331 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
332 if (qc->id && qc->id == radio_qctrl[i].id) {
333 memcpy(qc, &(radio_qctrl[i]),
341 static int vidioc_g_ctrl(struct file *file, void *priv,
342 struct v4l2_control *ctrl)
344 struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
347 case V4L2_CID_AUDIO_MUTE:
348 ctrl->value = radio->muted;
354 static int vidioc_s_ctrl(struct file *file, void *priv,
355 struct v4l2_control *ctrl)
357 struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
360 case V4L2_CID_AUDIO_MUTE:
362 if (dsbr100_stop(radio)==-1)
363 warn("Radio did not respond properly");
365 if (dsbr100_start(radio)==-1)
366 warn("Radio did not respond properly");
373 static int vidioc_g_audio(struct file *file, void *priv,
374 struct v4l2_audio *a)
379 strcpy(a->name, "Radio");
380 a->capability = V4L2_AUDCAP_STEREO;
384 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
390 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
397 static int vidioc_s_audio(struct file *file, void *priv,
398 struct v4l2_audio *a)
405 static int usb_dsbr100_open(struct inode *inode, struct file *file)
407 struct dsbr100_device *radio=video_get_drvdata(video_devdata(file));
412 if (dsbr100_start(radio)<0) {
413 warn("Radio did not start up properly");
417 dsbr100_setfreq(radio, radio->curfreq);
421 static int usb_dsbr100_close(struct inode *inode, struct file *file)
423 struct dsbr100_device *radio=video_get_drvdata(video_devdata(file));
428 if (radio->removed) {
429 kfree(radio->transfer_buffer);
435 /* File system interface */
436 static const struct file_operations usb_dsbr100_fops = {
437 .owner = THIS_MODULE,
438 .open = usb_dsbr100_open,
439 .release = usb_dsbr100_close,
440 .ioctl = video_ioctl2,
442 .compat_ioctl = v4l_compat_ioctl32,
448 static struct video_device dsbr100_videodev_template =
450 .owner = THIS_MODULE,
451 .name = "D-Link DSB-R 100",
452 .type = VID_TYPE_TUNER,
453 .fops = &usb_dsbr100_fops,
454 .release = video_device_release,
455 .vidioc_querycap = vidioc_querycap,
456 .vidioc_g_tuner = vidioc_g_tuner,
457 .vidioc_s_tuner = vidioc_s_tuner,
458 .vidioc_g_frequency = vidioc_g_frequency,
459 .vidioc_s_frequency = vidioc_s_frequency,
460 .vidioc_queryctrl = vidioc_queryctrl,
461 .vidioc_g_ctrl = vidioc_g_ctrl,
462 .vidioc_s_ctrl = vidioc_s_ctrl,
463 .vidioc_g_audio = vidioc_g_audio,
464 .vidioc_s_audio = vidioc_s_audio,
465 .vidioc_g_input = vidioc_g_input,
466 .vidioc_s_input = vidioc_s_input,
469 /* check if the device is present and register with v4l and
471 static int usb_dsbr100_probe(struct usb_interface *intf,
472 const struct usb_device_id *id)
474 struct dsbr100_device *radio;
476 if (!(radio = kmalloc(sizeof(struct dsbr100_device), GFP_KERNEL)))
478 if (!(radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL))) {
482 if (!(radio->videodev = video_device_alloc())) {
483 kfree(radio->transfer_buffer);
487 memcpy(radio->videodev, &dsbr100_videodev_template,
488 sizeof(dsbr100_videodev_template));
491 radio->usbdev = interface_to_usbdev(intf);
492 radio->curfreq = FREQ_MIN*FREQ_MUL;
493 video_set_drvdata(radio->videodev, radio);
494 if (video_register_device(radio->videodev, VFL_TYPE_RADIO,radio_nr)) {
495 warn("Could not register video device");
496 video_device_release(radio->videodev);
497 kfree(radio->transfer_buffer);
501 usb_set_intfdata(intf, radio);
505 static int __init dsbr100_init(void)
507 int retval = usb_register(&usb_dsbr100_driver);
508 info(DRIVER_VERSION ":" DRIVER_DESC);
512 static void __exit dsbr100_exit(void)
514 usb_deregister(&usb_dsbr100_driver);
517 module_init (dsbr100_init);
518 module_exit (dsbr100_exit);
520 MODULE_AUTHOR( DRIVER_AUTHOR );
521 MODULE_DESCRIPTION( DRIVER_DESC );
522 MODULE_LICENSE("GPL");