1 /* A driver for the D-Link DSB-R100 USB radio and Gemtek USB Radio 21.
2 The device plugs 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 Converted to v4l2_device.
40 Add suspend/resume functions, fix unplug of device,
41 a lot of cleanups and fixes by Alexey Klimov <klimov.linux@gmail.com>
44 Oliver Neukum: avoided DMA coherency issue
47 Converted dsbr100 to use video_ioctl2
48 by Douglas Landgraf <dougsland@gmail.com>
51 Alan Cox: Some cleanups and fixes
54 Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
57 Markus: Updates for 2.6.x kernels, code layout changes, name sanitizing
60 Markus: Updates for 2.5.x kernel and more ISO compliant source
63 PSL and Markus: Cleanup, radio now doesn't stop on device close
66 Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
67 right. Some minor cleanup, improved standalone compilation
70 Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
73 Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
74 thanks to Mike Cox for pointing the problem out.
77 Markus: Minor cleanup, warnings if something goes wrong, lame attempt
78 to adhere to Documentation/CodingStyle
81 Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
82 Markus: Copyright clarification
84 Version 0.01: Markus: initial release
88 #include <linux/kernel.h>
89 #include <linux/module.h>
90 #include <linux/init.h>
91 #include <linux/slab.h>
92 #include <linux/input.h>
93 #include <linux/videodev2.h>
94 #include <media/v4l2-device.h>
95 #include <media/v4l2-ioctl.h>
96 #include <linux/usb.h>
101 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
103 #define DRIVER_VERSION "v0.45"
104 #define RADIO_VERSION KERNEL_VERSION(0, 4, 5)
106 #define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
107 #define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
109 #define DSB100_VENDOR 0x04b4
110 #define DSB100_PRODUCT 0x1002
112 /* Commands the device appears to understand */
113 #define DSB100_TUNE 1
114 #define DSB100_ONOFF 2
118 /* Frequency limits in MHz -- these are European values. For Japanese
119 devices, that would be 76 and 91. */
120 #define FREQ_MIN 87.5
121 #define FREQ_MAX 108.0
122 #define FREQ_MUL 16000
124 #define videodev_to_radio(d) container_of(d, struct dsbr100_device, videodev)
126 static int usb_dsbr100_probe(struct usb_interface
*intf
,
127 const struct usb_device_id
*id
);
128 static void usb_dsbr100_disconnect(struct usb_interface
*intf
);
129 static int usb_dsbr100_open(struct file
*file
);
130 static int usb_dsbr100_close(struct file
*file
);
131 static int usb_dsbr100_suspend(struct usb_interface
*intf
,
132 pm_message_t message
);
133 static int usb_dsbr100_resume(struct usb_interface
*intf
);
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
;
142 struct v4l2_device v4l2_dev
;
145 struct mutex lock
; /* buffer locking */
153 static struct usb_device_id usb_dsbr100_device_table
[] = {
154 { USB_DEVICE(DSB100_VENDOR
, DSB100_PRODUCT
) },
155 { } /* Terminating entry */
158 MODULE_DEVICE_TABLE (usb
, usb_dsbr100_device_table
);
160 /* USB subsystem interface */
161 static struct usb_driver usb_dsbr100_driver
= {
163 .probe
= usb_dsbr100_probe
,
164 .disconnect
= usb_dsbr100_disconnect
,
165 .id_table
= usb_dsbr100_device_table
,
166 .suspend
= usb_dsbr100_suspend
,
167 .resume
= usb_dsbr100_resume
,
168 .reset_resume
= usb_dsbr100_resume
,
169 .supports_autosuspend
= 0,
172 /* Low-level device interface begins here */
174 /* switch on radio */
175 static int dsbr100_start(struct dsbr100_device
*radio
)
180 mutex_lock(&radio
->lock
);
182 retval
= usb_control_msg(radio
->usbdev
,
183 usb_rcvctrlpipe(radio
->usbdev
, 0),
185 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
186 0x00, 0xC7, radio
->transfer_buffer
, 8, 300);
189 request
= USB_REQ_GET_STATUS
;
190 goto usb_control_msg_failed
;
193 retval
= usb_control_msg(radio
->usbdev
,
194 usb_rcvctrlpipe(radio
->usbdev
, 0),
196 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
197 0x01, 0x00, radio
->transfer_buffer
, 8, 300);
200 request
= DSB100_ONOFF
;
201 goto usb_control_msg_failed
;
205 mutex_unlock(&radio
->lock
);
206 return (radio
->transfer_buffer
)[0];
208 usb_control_msg_failed
:
209 mutex_unlock(&radio
->lock
);
210 dev_err(&radio
->usbdev
->dev
,
211 "%s - usb_control_msg returned %i, request %i\n",
212 __func__
, retval
, request
);
217 /* switch off radio */
218 static int dsbr100_stop(struct dsbr100_device
*radio
)
223 mutex_lock(&radio
->lock
);
225 retval
= usb_control_msg(radio
->usbdev
,
226 usb_rcvctrlpipe(radio
->usbdev
, 0),
228 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
229 0x16, 0x1C, radio
->transfer_buffer
, 8, 300);
232 request
= USB_REQ_GET_STATUS
;
233 goto usb_control_msg_failed
;
236 retval
= usb_control_msg(radio
->usbdev
,
237 usb_rcvctrlpipe(radio
->usbdev
, 0),
239 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
240 0x00, 0x00, radio
->transfer_buffer
, 8, 300);
243 request
= DSB100_ONOFF
;
244 goto usb_control_msg_failed
;
248 mutex_unlock(&radio
->lock
);
249 return (radio
->transfer_buffer
)[0];
251 usb_control_msg_failed
:
252 mutex_unlock(&radio
->lock
);
253 dev_err(&radio
->usbdev
->dev
,
254 "%s - usb_control_msg returned %i, request %i\n",
255 __func__
, retval
, request
);
260 /* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
261 static int dsbr100_setfreq(struct dsbr100_device
*radio
, int freq
)
266 freq
= (freq
/ 16 * 80) / 1000 + 856;
267 mutex_lock(&radio
->lock
);
269 retval
= usb_control_msg(radio
->usbdev
,
270 usb_rcvctrlpipe(radio
->usbdev
, 0),
272 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
273 (freq
>> 8) & 0x00ff, freq
& 0xff,
274 radio
->transfer_buffer
, 8, 300);
277 request
= DSB100_TUNE
;
278 goto usb_control_msg_failed
;
281 retval
= usb_control_msg(radio
->usbdev
,
282 usb_rcvctrlpipe(radio
->usbdev
, 0),
284 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
285 0x96, 0xB7, radio
->transfer_buffer
, 8, 300);
288 request
= USB_REQ_GET_STATUS
;
289 goto usb_control_msg_failed
;
292 retval
= usb_control_msg(radio
->usbdev
,
293 usb_rcvctrlpipe(radio
->usbdev
, 0),
295 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
296 0x00, 0x24, radio
->transfer_buffer
, 8, 300);
299 request
= USB_REQ_GET_STATUS
;
300 goto usb_control_msg_failed
;
303 radio
->stereo
= !((radio
->transfer_buffer
)[0] & 0x01);
304 mutex_unlock(&radio
->lock
);
305 return (radio
->transfer_buffer
)[0];
307 usb_control_msg_failed
:
309 mutex_unlock(&radio
->lock
);
310 dev_err(&radio
->usbdev
->dev
,
311 "%s - usb_control_msg returned %i, request %i\n",
312 __func__
, retval
, request
);
316 /* return the device status. This is, in effect, just whether it
317 sees a stereo signal or not. Pity. */
318 static void dsbr100_getstat(struct dsbr100_device
*radio
)
322 mutex_lock(&radio
->lock
);
324 retval
= usb_control_msg(radio
->usbdev
,
325 usb_rcvctrlpipe(radio
->usbdev
, 0),
327 USB_TYPE_VENDOR
| USB_RECIP_DEVICE
| USB_DIR_IN
,
328 0x00 , 0x24, radio
->transfer_buffer
, 8, 300);
332 dev_err(&radio
->usbdev
->dev
,
333 "%s - usb_control_msg returned %i, request %i\n",
334 __func__
, retval
, USB_REQ_GET_STATUS
);
336 radio
->stereo
= !(radio
->transfer_buffer
[0] & 0x01);
339 mutex_unlock(&radio
->lock
);
342 /* USB subsystem interface begins here */
345 * Handle unplugging of the device.
346 * We call video_unregister_device in any case.
347 * The last function called in this procedure is
348 * usb_dsbr100_video_device_release
350 static void usb_dsbr100_disconnect(struct usb_interface
*intf
)
352 struct dsbr100_device
*radio
= usb_get_intfdata(intf
);
354 usb_set_intfdata (intf
, NULL
);
356 mutex_lock(&radio
->lock
);
358 mutex_unlock(&radio
->lock
);
360 video_unregister_device(&radio
->videodev
);
361 v4l2_device_disconnect(&radio
->v4l2_dev
);
365 static int vidioc_querycap(struct file
*file
, void *priv
,
366 struct v4l2_capability
*v
)
368 struct dsbr100_device
*radio
= video_drvdata(file
);
370 strlcpy(v
->driver
, "dsbr100", sizeof(v
->driver
));
371 strlcpy(v
->card
, "D-Link R-100 USB FM Radio", sizeof(v
->card
));
372 usb_make_path(radio
->usbdev
, v
->bus_info
, sizeof(v
->bus_info
));
373 v
->version
= RADIO_VERSION
;
374 v
->capabilities
= V4L2_CAP_TUNER
;
378 static int vidioc_g_tuner(struct file
*file
, void *priv
,
379 struct v4l2_tuner
*v
)
381 struct dsbr100_device
*radio
= video_drvdata(file
);
390 dsbr100_getstat(radio
);
391 strcpy(v
->name
, "FM");
392 v
->type
= V4L2_TUNER_RADIO
;
393 v
->rangelow
= FREQ_MIN
* FREQ_MUL
;
394 v
->rangehigh
= FREQ_MAX
* FREQ_MUL
;
395 v
->rxsubchans
= V4L2_TUNER_SUB_MONO
| V4L2_TUNER_SUB_STEREO
;
396 v
->capability
= V4L2_TUNER_CAP_LOW
;
398 v
->audmode
= V4L2_TUNER_MODE_STEREO
;
400 v
->audmode
= V4L2_TUNER_MODE_MONO
;
401 v
->signal
= 0xffff; /* We can't get the signal strength */
405 static int vidioc_s_tuner(struct file
*file
, void *priv
,
406 struct v4l2_tuner
*v
)
408 struct dsbr100_device
*radio
= video_drvdata(file
);
420 static int vidioc_s_frequency(struct file
*file
, void *priv
,
421 struct v4l2_frequency
*f
)
423 struct dsbr100_device
*radio
= video_drvdata(file
);
430 mutex_lock(&radio
->lock
);
431 radio
->curfreq
= f
->frequency
;
432 mutex_unlock(&radio
->lock
);
434 retval
= dsbr100_setfreq(radio
, radio
->curfreq
);
436 dev_warn(&radio
->usbdev
->dev
, "Set frequency failed\n");
440 static int vidioc_g_frequency(struct file
*file
, void *priv
,
441 struct v4l2_frequency
*f
)
443 struct dsbr100_device
*radio
= video_drvdata(file
);
449 f
->type
= V4L2_TUNER_RADIO
;
450 f
->frequency
= radio
->curfreq
;
454 static int vidioc_queryctrl(struct file
*file
, void *priv
,
455 struct v4l2_queryctrl
*qc
)
458 case V4L2_CID_AUDIO_MUTE
:
459 return v4l2_ctrl_query_fill(qc
, 0, 1, 1, 1);
465 static int vidioc_g_ctrl(struct file
*file
, void *priv
,
466 struct v4l2_control
*ctrl
)
468 struct dsbr100_device
*radio
= video_drvdata(file
);
475 case V4L2_CID_AUDIO_MUTE
:
476 ctrl
->value
= radio
->muted
;
482 static int vidioc_s_ctrl(struct file
*file
, void *priv
,
483 struct v4l2_control
*ctrl
)
485 struct dsbr100_device
*radio
= video_drvdata(file
);
493 case V4L2_CID_AUDIO_MUTE
:
495 retval
= dsbr100_stop(radio
);
497 dev_warn(&radio
->usbdev
->dev
,
498 "Radio did not respond properly\n");
502 retval
= dsbr100_start(radio
);
504 dev_warn(&radio
->usbdev
->dev
,
505 "Radio did not respond properly\n");
514 static int vidioc_g_audio(struct file
*file
, void *priv
,
515 struct v4l2_audio
*a
)
520 strcpy(a
->name
, "Radio");
521 a
->capability
= V4L2_AUDCAP_STEREO
;
525 static int vidioc_g_input(struct file
*filp
, void *priv
, unsigned int *i
)
531 static int vidioc_s_input(struct file
*filp
, void *priv
, unsigned int i
)
538 static int vidioc_s_audio(struct file
*file
, void *priv
,
539 struct v4l2_audio
*a
)
546 static int usb_dsbr100_open(struct file
*file
)
548 struct dsbr100_device
*radio
= video_drvdata(file
);
555 retval
= dsbr100_start(radio
);
557 dev_warn(&radio
->usbdev
->dev
,
558 "Radio did not start up properly\n");
564 retval
= dsbr100_setfreq(radio
, radio
->curfreq
);
566 dev_warn(&radio
->usbdev
->dev
,
567 "set frequency failed\n");
573 static int usb_dsbr100_close(struct file
*file
)
575 struct dsbr100_device
*radio
= video_drvdata(file
);
581 mutex_lock(&radio
->lock
);
583 mutex_unlock(&radio
->lock
);
585 if (!radio
->removed
) {
586 retval
= dsbr100_stop(radio
);
588 dev_warn(&radio
->usbdev
->dev
,
589 "dsbr100_stop failed\n");
596 /* Suspend device - stop device. */
597 static int usb_dsbr100_suspend(struct usb_interface
*intf
, pm_message_t message
)
599 struct dsbr100_device
*radio
= usb_get_intfdata(intf
);
602 retval
= dsbr100_stop(radio
);
604 dev_warn(&intf
->dev
, "dsbr100_stop failed\n");
606 dev_info(&intf
->dev
, "going into suspend..\n");
611 /* Resume device - start device. */
612 static int usb_dsbr100_resume(struct usb_interface
*intf
)
614 struct dsbr100_device
*radio
= usb_get_intfdata(intf
);
617 retval
= dsbr100_start(radio
);
619 dev_warn(&intf
->dev
, "dsbr100_start failed\n");
621 dev_info(&intf
->dev
, "coming out of suspend..\n");
626 /* free data structures */
627 static void usb_dsbr100_video_device_release(struct video_device
*videodev
)
629 struct dsbr100_device
*radio
= videodev_to_radio(videodev
);
631 v4l2_device_unregister(&radio
->v4l2_dev
);
632 kfree(radio
->transfer_buffer
);
636 /* File system interface */
637 static const struct v4l2_file_operations usb_dsbr100_fops
= {
638 .owner
= THIS_MODULE
,
639 .open
= usb_dsbr100_open
,
640 .release
= usb_dsbr100_close
,
641 .ioctl
= video_ioctl2
,
644 static const struct v4l2_ioctl_ops usb_dsbr100_ioctl_ops
= {
645 .vidioc_querycap
= vidioc_querycap
,
646 .vidioc_g_tuner
= vidioc_g_tuner
,
647 .vidioc_s_tuner
= vidioc_s_tuner
,
648 .vidioc_g_frequency
= vidioc_g_frequency
,
649 .vidioc_s_frequency
= vidioc_s_frequency
,
650 .vidioc_queryctrl
= vidioc_queryctrl
,
651 .vidioc_g_ctrl
= vidioc_g_ctrl
,
652 .vidioc_s_ctrl
= vidioc_s_ctrl
,
653 .vidioc_g_audio
= vidioc_g_audio
,
654 .vidioc_s_audio
= vidioc_s_audio
,
655 .vidioc_g_input
= vidioc_g_input
,
656 .vidioc_s_input
= vidioc_s_input
,
659 /* check if the device is present and register with v4l and usb if it is */
660 static int usb_dsbr100_probe(struct usb_interface
*intf
,
661 const struct usb_device_id
*id
)
663 struct dsbr100_device
*radio
;
664 struct v4l2_device
*v4l2_dev
;
667 radio
= kzalloc(sizeof(struct dsbr100_device
), GFP_KERNEL
);
672 radio
->transfer_buffer
= kmalloc(TB_LEN
, GFP_KERNEL
);
674 if (!(radio
->transfer_buffer
)) {
679 v4l2_dev
= &radio
->v4l2_dev
;
681 retval
= v4l2_device_register(&intf
->dev
, v4l2_dev
);
683 v4l2_err(v4l2_dev
, "couldn't register v4l2_device\n");
684 kfree(radio
->transfer_buffer
);
689 strlcpy(radio
->videodev
.name
, v4l2_dev
->name
, sizeof(radio
->videodev
.name
));
690 radio
->videodev
.v4l2_dev
= v4l2_dev
;
691 radio
->videodev
.fops
= &usb_dsbr100_fops
;
692 radio
->videodev
.ioctl_ops
= &usb_dsbr100_ioctl_ops
;
693 radio
->videodev
.release
= usb_dsbr100_video_device_release
;
695 mutex_init(&radio
->lock
);
699 radio
->usbdev
= interface_to_usbdev(intf
);
700 radio
->curfreq
= FREQ_MIN
* FREQ_MUL
;
702 video_set_drvdata(&radio
->videodev
, radio
);
704 retval
= video_register_device(&radio
->videodev
, VFL_TYPE_RADIO
, radio_nr
);
706 v4l2_err(v4l2_dev
, "couldn't register video device\n");
707 v4l2_device_unregister(v4l2_dev
);
708 kfree(radio
->transfer_buffer
);
712 usb_set_intfdata(intf
, radio
);
716 static int __init
dsbr100_init(void)
718 int retval
= usb_register(&usb_dsbr100_driver
);
719 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
724 static void __exit
dsbr100_exit(void)
726 usb_deregister(&usb_dsbr100_driver
);
729 module_init (dsbr100_init
);
730 module_exit (dsbr100_exit
);
732 MODULE_AUTHOR( DRIVER_AUTHOR
);
733 MODULE_DESCRIPTION( DRIVER_DESC
);
734 MODULE_LICENSE("GPL");