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![Douglas Landgraf](/assets/img/avatar_default.png)
Convert dsbr100 to use video_ioctl2 Signed-off-by: Douglas Schilling Landgraf <dougsland@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
512 lines
14 KiB
C
512 lines
14 KiB
C
/* A driver for the D-Link DSB-R100 USB radio. The R100 plugs
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into both the USB and an analog audio input, so this thing
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only deals with initialisation and frequency setting, the
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audio data has to be handled by a sound driver.
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Major issue: I can't find out where the device reports the signal
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strength, and indeed the windows software appearantly just looks
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at the stereo indicator as well. So, scanning will only find
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stereo stations. Sad, but I can't help it.
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Also, the windows program sends oodles of messages over to the
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device, and I couldn't figure out their meaning. My suspicion
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is that they don't have any:-)
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You might find some interesting stuff about this module at
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http://unimut.fsk.uni-heidelberg.de/unimut/demi/dsbr
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Copyright (c) 2000 Markus Demleitner <msdemlei@cl.uni-heidelberg.de>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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History:
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Version 0.42:
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Converted dsbr100 to use video_ioctl2
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by Douglas Landgraf <dougsland@gmail.com>
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Version 0.41-ac1:
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Alan Cox: Some cleanups and fixes
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Version 0.41:
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Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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Version 0.40:
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Markus: Updates for 2.6.x kernels, code layout changes, name sanitizing
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Version 0.30:
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Markus: Updates for 2.5.x kernel and more ISO compliant source
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Version 0.25:
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PSL and Markus: Cleanup, radio now doesn't stop on device close
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Version 0.24:
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Markus: Hope I got these silly VIDEO_TUNER_LOW issues finally
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right. Some minor cleanup, improved standalone compilation
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Version 0.23:
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Markus: Sign extension bug fixed by declaring transfer_buffer unsigned
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Version 0.22:
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Markus: Some (brown bag) cleanup in what VIDIOCSTUNER returns,
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thanks to Mike Cox for pointing the problem out.
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Version 0.21:
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Markus: Minor cleanup, warnings if something goes wrong, lame attempt
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to adhere to Documentation/CodingStyle
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Version 0.2:
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Brad Hards <bradh@dynamite.com.au>: Fixes to make it work as non-module
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Markus: Copyright clarification
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Version 0.01: Markus: initial release
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-common.h>
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#include <linux/usb.h>
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/*
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* Version Information
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*/
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#define DRIVER_VERSION "v0.41"
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#define RADIO_VERSION KERNEL_VERSION(0,4,1)
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static struct v4l2_queryctrl radio_qctrl[] = {
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{
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.id = V4L2_CID_AUDIO_MUTE,
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.name = "Mute",
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.minimum = 0,
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.maximum = 1,
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.default_value = 1,
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.type = V4L2_CTRL_TYPE_BOOLEAN,
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}
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};
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#define DRIVER_AUTHOR "Markus Demleitner <msdemlei@tucana.harvard.edu>"
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#define DRIVER_DESC "D-Link DSB-R100 USB FM radio driver"
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#define DSB100_VENDOR 0x04b4
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#define DSB100_PRODUCT 0x1002
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/* Commands the device appears to understand */
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#define DSB100_TUNE 1
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#define DSB100_ONOFF 2
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#define TB_LEN 16
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/* Frequency limits in MHz -- these are European values. For Japanese
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devices, that would be 76 and 91. */
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#define FREQ_MIN 87.5
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#define FREQ_MAX 108.0
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#define FREQ_MUL 16000
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static int usb_dsbr100_probe(struct usb_interface *intf,
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const struct usb_device_id *id);
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static void usb_dsbr100_disconnect(struct usb_interface *intf);
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static int usb_dsbr100_open(struct inode *inode, struct file *file);
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static int usb_dsbr100_close(struct inode *inode, struct file *file);
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static int radio_nr = -1;
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module_param(radio_nr, int, 0);
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/* Data for one (physical) device */
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struct dsbr100_device {
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struct usb_device *usbdev;
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struct video_device *videodev;
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unsigned char transfer_buffer[TB_LEN];
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int curfreq;
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int stereo;
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int users;
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int removed;
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int muted;
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};
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static struct usb_device_id usb_dsbr100_device_table [] = {
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{ USB_DEVICE(DSB100_VENDOR, DSB100_PRODUCT) },
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE (usb, usb_dsbr100_device_table);
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/* USB subsystem interface */
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static struct usb_driver usb_dsbr100_driver = {
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.name = "dsbr100",
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.probe = usb_dsbr100_probe,
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.disconnect = usb_dsbr100_disconnect,
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.id_table = usb_dsbr100_device_table,
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};
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/* Low-level device interface begins here */
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/* switch on radio */
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static int dsbr100_start(struct dsbr100_device *radio)
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{
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if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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USB_REQ_GET_STATUS,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x00, 0xC7, radio->transfer_buffer, 8, 300)<0 ||
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usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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DSB100_ONOFF,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x01, 0x00, radio->transfer_buffer, 8, 300)<0)
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return -1;
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radio->muted=0;
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return (radio->transfer_buffer)[0];
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}
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/* switch off radio */
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static int dsbr100_stop(struct dsbr100_device *radio)
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{
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if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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USB_REQ_GET_STATUS,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x16, 0x1C, radio->transfer_buffer, 8, 300)<0 ||
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usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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DSB100_ONOFF,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x00, 0x00, radio->transfer_buffer, 8, 300)<0)
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return -1;
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radio->muted=1;
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return (radio->transfer_buffer)[0];
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}
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/* set a frequency, freq is defined by v4l's TUNER_LOW, i.e. 1/16th kHz */
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static int dsbr100_setfreq(struct dsbr100_device *radio, int freq)
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{
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freq = (freq/16*80)/1000+856;
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if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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DSB100_TUNE,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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(freq>>8)&0x00ff, freq&0xff,
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radio->transfer_buffer, 8, 300)<0 ||
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usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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USB_REQ_GET_STATUS,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x96, 0xB7, radio->transfer_buffer, 8, 300)<0 ||
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usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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USB_REQ_GET_STATUS,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x00, 0x24, radio->transfer_buffer, 8, 300)<0) {
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radio->stereo = -1;
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return -1;
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}
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radio->stereo = ! ((radio->transfer_buffer)[0]&0x01);
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return (radio->transfer_buffer)[0];
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}
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/* return the device status. This is, in effect, just whether it
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sees a stereo signal or not. Pity. */
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static void dsbr100_getstat(struct dsbr100_device *radio)
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{
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if (usb_control_msg(radio->usbdev, usb_rcvctrlpipe(radio->usbdev, 0),
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USB_REQ_GET_STATUS,
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USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
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0x00 , 0x24, radio->transfer_buffer, 8, 300)<0)
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radio->stereo = -1;
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else
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radio->stereo = ! (radio->transfer_buffer[0]&0x01);
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}
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/* USB subsystem interface begins here */
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/* handle unplugging of the device, release data structures
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if nothing keeps us from doing it. If something is still
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keeping us busy, the release callback of v4l will take care
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of releasing it. stv680.c does not relase its private
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data, so I don't do this here either. Checking out the
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code I'd expect I better did that, but if there's a memory
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leak here it's tiny (~50 bytes per disconnect) */
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static void usb_dsbr100_disconnect(struct usb_interface *intf)
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{
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struct dsbr100_device *radio = usb_get_intfdata(intf);
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usb_set_intfdata (intf, NULL);
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if (radio) {
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video_unregister_device(radio->videodev);
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radio->videodev = NULL;
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if (radio->users) {
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kfree(radio);
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} else {
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radio->removed = 1;
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}
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}
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}
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static int vidioc_querycap(struct file *file, void *priv,
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struct v4l2_capability *v)
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{
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strlcpy(v->driver, "dsbr100", sizeof(v->driver));
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strlcpy(v->card, "D-Link R-100 USB FM Radio", sizeof(v->card));
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sprintf(v->bus_info, "ISA");
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v->version = RADIO_VERSION;
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v->capabilities = V4L2_CAP_TUNER;
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return 0;
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}
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static int vidioc_g_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
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if (v->index > 0)
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return -EINVAL;
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dsbr100_getstat(radio);
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strcpy(v->name, "FM");
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v->type = V4L2_TUNER_RADIO;
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v->rangelow = FREQ_MIN*FREQ_MUL;
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v->rangehigh = FREQ_MAX*FREQ_MUL;
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v->rxsubchans = V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
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v->capability = V4L2_TUNER_CAP_LOW;
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if(radio->stereo)
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v->audmode = V4L2_TUNER_MODE_STEREO;
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else
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v->audmode = V4L2_TUNER_MODE_MONO;
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v->signal = 0xffff; /* We can't get the signal strength */
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return 0;
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}
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static int vidioc_s_tuner(struct file *file, void *priv,
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struct v4l2_tuner *v)
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{
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if (v->index > 0)
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return -EINVAL;
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return 0;
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}
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static int vidioc_s_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
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radio->curfreq = f->frequency;
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if (dsbr100_setfreq(radio, radio->curfreq)==-1)
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warn("Set frequency failed");
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return 0;
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}
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static int vidioc_g_frequency(struct file *file, void *priv,
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struct v4l2_frequency *f)
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{
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struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
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f->type = V4L2_TUNER_RADIO;
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f->frequency = radio->curfreq;
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return 0;
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}
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static int vidioc_queryctrl(struct file *file, void *priv,
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struct v4l2_queryctrl *qc)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
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if (qc->id && qc->id == radio_qctrl[i].id) {
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memcpy(qc, &(radio_qctrl[i]),
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sizeof(*qc));
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return 0;
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}
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}
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return -EINVAL;
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}
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static int vidioc_g_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value = radio->muted;
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_s_ctrl(struct file *file, void *priv,
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struct v4l2_control *ctrl)
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{
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struct dsbr100_device *radio = video_get_drvdata(video_devdata(file));
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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if (ctrl->value) {
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if (dsbr100_stop(radio)==-1)
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warn("Radio did not respond properly");
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} else {
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if (dsbr100_start(radio)==-1)
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warn("Radio did not respond properly");
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}
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return 0;
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}
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return -EINVAL;
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}
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static int vidioc_g_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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if (a->index > 1)
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return -EINVAL;
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strcpy(a->name, "Radio");
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a->capability = V4L2_AUDCAP_STEREO;
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return 0;
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}
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static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
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{
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*i = 0;
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return 0;
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}
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static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
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{
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if (i != 0)
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return -EINVAL;
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return 0;
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}
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static int vidioc_s_audio(struct file *file, void *priv,
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struct v4l2_audio *a)
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{
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if (a->index != 0)
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return -EINVAL;
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return 0;
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}
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static int usb_dsbr100_open(struct inode *inode, struct file *file)
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{
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struct dsbr100_device *radio=video_get_drvdata(video_devdata(file));
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radio->users = 1;
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radio->muted = 1;
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if (dsbr100_start(radio)<0) {
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warn("Radio did not start up properly");
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radio->users = 0;
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return -EIO;
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}
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dsbr100_setfreq(radio, radio->curfreq);
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return 0;
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}
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static int usb_dsbr100_close(struct inode *inode, struct file *file)
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{
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struct dsbr100_device *radio=video_get_drvdata(video_devdata(file));
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if (!radio)
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return -ENODEV;
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radio->users = 0;
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if (radio->removed) {
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kfree(radio);
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}
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return 0;
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}
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/* File system interface */
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static const struct file_operations usb_dsbr100_fops = {
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.owner = THIS_MODULE,
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.open = usb_dsbr100_open,
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.release = usb_dsbr100_close,
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.ioctl = video_ioctl2,
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.compat_ioctl = v4l_compat_ioctl32,
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.llseek = no_llseek,
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};
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/* V4L2 interface */
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static struct video_device dsbr100_videodev_template =
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{
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.owner = THIS_MODULE,
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.name = "D-Link DSB-R 100",
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.type = VID_TYPE_TUNER,
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.fops = &usb_dsbr100_fops,
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.release = video_device_release,
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.vidioc_querycap = vidioc_querycap,
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.vidioc_g_tuner = vidioc_g_tuner,
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.vidioc_s_tuner = vidioc_s_tuner,
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.vidioc_g_frequency = vidioc_g_frequency,
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.vidioc_s_frequency = vidioc_s_frequency,
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.vidioc_queryctrl = vidioc_queryctrl,
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.vidioc_g_ctrl = vidioc_g_ctrl,
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.vidioc_s_ctrl = vidioc_s_ctrl,
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.vidioc_g_audio = vidioc_g_audio,
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.vidioc_s_audio = vidioc_s_audio,
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.vidioc_g_input = vidioc_g_input,
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.vidioc_s_input = vidioc_s_input,
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};
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/* check if the device is present and register with v4l and
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usb if it is */
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static int usb_dsbr100_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct dsbr100_device *radio;
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if (!(radio = kmalloc(sizeof(struct dsbr100_device), GFP_KERNEL)))
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return -ENOMEM;
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if (!(radio->videodev = video_device_alloc())) {
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kfree(radio);
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return -ENOMEM;
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}
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memcpy(radio->videodev, &dsbr100_videodev_template,
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sizeof(dsbr100_videodev_template));
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radio->removed = 0;
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radio->users = 0;
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radio->usbdev = interface_to_usbdev(intf);
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radio->curfreq = FREQ_MIN*FREQ_MUL;
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video_set_drvdata(radio->videodev, radio);
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if (video_register_device(radio->videodev, VFL_TYPE_RADIO,radio_nr)) {
|
|
warn("Could not register video device");
|
|
video_device_release(radio->videodev);
|
|
kfree(radio);
|
|
return -EIO;
|
|
}
|
|
usb_set_intfdata(intf, radio);
|
|
return 0;
|
|
}
|
|
|
|
static int __init dsbr100_init(void)
|
|
{
|
|
int retval = usb_register(&usb_dsbr100_driver);
|
|
info(DRIVER_VERSION ":" DRIVER_DESC);
|
|
return retval;
|
|
}
|
|
|
|
static void __exit dsbr100_exit(void)
|
|
{
|
|
usb_deregister(&usb_dsbr100_driver);
|
|
}
|
|
|
|
module_init (dsbr100_init);
|
|
module_exit (dsbr100_exit);
|
|
|
|
MODULE_AUTHOR( DRIVER_AUTHOR );
|
|
MODULE_DESCRIPTION( DRIVER_DESC );
|
|
MODULE_LICENSE("GPL");
|