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 <media/v4l2-ioctl.h>
89 #include <linux/usb.h>
94 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
96 #define DRIVER_VERSION "v0.41"
97 #define RADIO_VERSION KERNEL_VERSION(0,4,1)
99 static struct v4l2_queryctrl radio_qctrl[] = {
101 .id = V4L2_CID_AUDIO_MUTE,
106 .type = V4L2_CTRL_TYPE_BOOLEAN,
110 #define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
111 #define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
113 #define DSB100_VENDOR 0x04b4
114 #define DSB100_PRODUCT 0x1002
116 /* Commands the device appears to understand */
117 #define DSB100_TUNE 1
118 #define DSB100_ONOFF 2
122 /* Frequency limits in MHz -- these are European values. For Japanese
123 devices, that would be 76 and 91. */
124 #define FREQ_MIN 87.5
125 #define FREQ_MAX 108.0
126 #define FREQ_MUL 16000
129 static int usb_dsbr100_probe(struct usb_interface *intf,
130 const struct usb_device_id *id);
131 static void usb_dsbr100_disconnect(struct usb_interface *intf);
132 static int usb_dsbr100_open(struct inode *inode, struct file *file);
133 static int usb_dsbr100_close(struct inode *inode, struct file *file);
135 static int radio_nr = -1;
136 module_param(radio_nr, int, 0);
138 /* Data for one (physical) device */
139 struct dsbr100_device {
140 struct usb_device *usbdev;
141 struct video_device *videodev;
151 static struct usb_device_id usb_dsbr100_device_table [] = {
152 { USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
153 { } /* Terminating entry */
156 MODULE_DEVICE_TABLE (usb, usb_dsbr100_device_table);
158 /* USB subsystem interface */
159 static struct usb_driver usb_dsbr100_driver = {
161 .probe = usb_dsbr100_probe,
162 .disconnect = usb_dsbr100_disconnect,
163 .id_table = usb_dsbr100_device_table,
166 /* Low-level device interface begins here */
168 /* switch on radio */
169 static int dsbr100_start(struct dsbr100_device *radio)
171 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
173 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
174 0x00, 0xC7, radio->transfer_buffer, 8, 300)<0 ||
175 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
177 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
178 0x01, 0x00, radio->transfer_buffer, 8, 300)<0)
181 return (radio->transfer_buffer)[0];
185 /* switch off radio */
186 static int dsbr100_stop(struct dsbr100_device *radio)
188 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
190 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
191 0x16, 0x1C, radio->transfer_buffer, 8, 300)<0 ||
192 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
194 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
195 0x00, 0x00, radio->transfer_buffer, 8, 300)<0)
198 return (radio->transfer_buffer)[0];
201 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
202 static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
204 freq = (freq/16*80)/1000+856;
205 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
207 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
208 (freq>>8)&0x00ff, freq&0xff,
209 radio->transfer_buffer, 8, 300)<0 ||
210 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
212 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
213 0x96, 0xB7, radio->transfer_buffer, 8, 300)<0 ||
214 usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
216 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
217 0x00, 0x24, radio->transfer_buffer, 8, 300)<0) {
221 radio->stereo = ! ((radio->transfer_buffer)[0]&0x01);
222 return (radio->transfer_buffer)[0];
225 /* return the device status. This is, in effect, just whether it
226 sees a stereo signal or not. Pity. */
227 static void dsbr100_getstat(struct dsbr100_device *radio)
229 if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
231 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
232 0x00 , 0x24, radio->transfer_buffer, 8, 300)<0)
235 radio->stereo = ! (radio->transfer_buffer[0]&0x01);
239 /* USB subsystem interface begins here */
241 /* handle unplugging of the device, release data structures
242 if nothing keeps us from doing it. If something is still
243 keeping us busy, the release callback of v4l will take care
245 static void usb_dsbr100_disconnect(struct usb_interface *intf)
247 struct dsbr100_device *radio = usb_get_intfdata(intf);
249 usb_set_intfdata (intf, NULL);
251 video_unregister_device(radio->videodev);
252 radio->videodev = NULL;
254 kfree(radio->transfer_buffer);
263 static int vidioc_querycap(struct file *file, void *priv,
264 struct v4l2_capability *v)
266 strlcpy(v->driver, "dsbr100", sizeof(v->driver));
267 strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
268 sprintf(v->bus_info, "ISA");
269 v->version = RADIO_VERSION;
270 v->capabilities = V4L2_CAP_TUNER;
274 static int vidioc_g_tuner(struct file *file, void *priv,
275 struct v4l2_tuner *v)
277 struct dsbr100_device *radio = video_drvdata(file);
282 dsbr100_getstat(radio);
283 strcpy(v->name, "FM");
284 v->type = V4L2_TUNER_RADIO;
285 v->rangelow = FREQ_MIN*FREQ_MUL;
286 v->rangehigh = FREQ_MAX*FREQ_MUL;
287 v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
288 v->capability = V4L2_TUNER_CAP_LOW;
290 v->audmode = V4L2_TUNER_MODE_STEREO;
292 v->audmode = V4L2_TUNER_MODE_MONO;
293 v->signal = 0xffff; /* We can't get the signal strength */
297 static int vidioc_s_tuner(struct file *file, void *priv,
298 struct v4l2_tuner *v)
306 static int vidioc_s_frequency(struct file *file, void *priv,
307 struct v4l2_frequency *f)
309 struct dsbr100_device *radio = video_drvdata(file);
311 radio->curfreq = f->frequency;
312 if (dsbr100_setfreq(radio, radio->curfreq)==-1)
313 warn("Set frequency failed");
317 static int vidioc_g_frequency(struct file *file, void *priv,
318 struct v4l2_frequency *f)
320 struct dsbr100_device *radio = video_drvdata(file);
322 f->type = V4L2_TUNER_RADIO;
323 f->frequency = radio->curfreq;
327 static int vidioc_queryctrl(struct file *file, void *priv,
328 struct v4l2_queryctrl *qc)
332 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
333 if (qc->id && qc->id == radio_qctrl[i].id) {
334 memcpy(qc, &(radio_qctrl[i]),
342 static int vidioc_g_ctrl(struct file *file, void *priv,
343 struct v4l2_control *ctrl)
345 struct dsbr100_device *radio = video_drvdata(file);
348 case V4L2_CID_AUDIO_MUTE:
349 ctrl->value = radio->muted;
355 static int vidioc_s_ctrl(struct file *file, void *priv,
356 struct v4l2_control *ctrl)
358 struct dsbr100_device *radio = video_drvdata(file);
361 case V4L2_CID_AUDIO_MUTE:
363 if (dsbr100_stop(radio) == -1) {
364 warn("Radio did not respond properly");
368 if (dsbr100_start(radio) == -1) {
369 warn("Radio did not respond properly");
378 static int vidioc_g_audio(struct file *file, void *priv,
379 struct v4l2_audio *a)
384 strcpy(a->name, "Radio");
385 a->capability = V4L2_AUDCAP_STEREO;
389 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
395 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
402 static int vidioc_s_audio(struct file *file, void *priv,
403 struct v4l2_audio *a)
410 static int usb_dsbr100_open(struct inode *inode, struct file *file)
412 struct dsbr100_device *radio = video_drvdata(file);
418 if (dsbr100_start(radio)<0) {
419 warn("Radio did not start up properly");
424 dsbr100_setfreq(radio, radio->curfreq);
429 static int usb_dsbr100_close(struct inode *inode, struct file *file)
431 struct dsbr100_device *radio = video_drvdata(file);
436 if (radio->removed) {
437 kfree(radio->transfer_buffer);
443 /* File system interface */
444 static const struct file_operations usb_dsbr100_fops = {
445 .owner = THIS_MODULE,
446 .open = usb_dsbr100_open,
447 .release = usb_dsbr100_close,
448 .ioctl = video_ioctl2,
450 .compat_ioctl = v4l_compat_ioctl32,
455 static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops = {
456 .vidioc_querycap = vidioc_querycap,
457 .vidioc_g_tuner = vidioc_g_tuner,
458 .vidioc_s_tuner = vidioc_s_tuner,
459 .vidioc_g_frequency = vidioc_g_frequency,
460 .vidioc_s_frequency = vidioc_s_frequency,
461 .vidioc_queryctrl = vidioc_queryctrl,
462 .vidioc_g_ctrl = vidioc_g_ctrl,
463 .vidioc_s_ctrl = vidioc_s_ctrl,
464 .vidioc_g_audio = vidioc_g_audio,
465 .vidioc_s_audio = vidioc_s_audio,
466 .vidioc_g_input = vidioc_g_input,
467 .vidioc_s_input = vidioc_s_input,
471 static struct video_device dsbr100_videodev_template = {
472 .name = "D-Link DSB-R 100",
473 .fops = &usb_dsbr100_fops,
474 .ioctl_ops = &usb_dsbr100_ioctl_ops,
475 .release = video_device_release,
478 /* check if the device is present and register with v4l and
480 static int usb_dsbr100_probe(struct usb_interface *intf,
481 const struct usb_device_id *id)
483 struct dsbr100_device *radio;
485 if (!(radio = kmalloc(sizeof(struct dsbr100_device), GFP_KERNEL)))
487 if (!(radio->transfer_buffer = kmalloc(TB_LEN, GFP_KERNEL))) {
491 if (!(radio->videodev = video_device_alloc())) {
492 kfree(radio->transfer_buffer);
496 memcpy(radio->videodev, &dsbr100_videodev_template,
497 sizeof(dsbr100_videodev_template));
500 radio->usbdev = interface_to_usbdev(intf);
501 radio->curfreq = FREQ_MIN*FREQ_MUL;
502 video_set_drvdata(radio->videodev, radio);
503 if (video_register_device(radio->videodev, VFL_TYPE_RADIO, radio_nr) < 0) {
504 warn("Could not register video device");
505 video_device_release(radio->videodev);
506 kfree(radio->transfer_buffer);
510 usb_set_intfdata(intf, radio);
514 static int __init dsbr100_init(void)
516 int retval = usb_register(&usb_dsbr100_driver);
517 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
522 static void __exit dsbr100_exit(void)
524 usb_deregister(&usb_dsbr100_driver);
527 module_init (dsbr100_init);
528 module_exit (dsbr100_exit);
530 MODULE_AUTHOR( DRIVER_AUTHOR );
531 MODULE_DESCRIPTION( DRIVER_DESC );
532 MODULE_LICENSE("GPL");