2005-04-16 16:20:36 -06:00
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/* Typhoon Radio Card driver for radio support
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* (c) 1999 Dr. Henrik Seidel <Henrik.Seidel@gmx.de>
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*
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* Card manufacturer:
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* http://194.18.155.92/idc/prod2.idc?nr=50753&lang=e
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*
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* Notes on the hardware
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*
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* This card has two output sockets, one for speakers and one for line.
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* The speaker output has volume control, but only in four discrete
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* steps. The line output has neither volume control nor mute.
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*
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* The card has auto-stereo according to its manual, although it all
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* sounds mono to me (even with the Win/DOS drivers). Maybe it's my
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* antenna - I really don't know for sure.
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*
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* Frequency control is done digitally.
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*
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* Volume control is done digitally, but there are only four different
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* possible values. So you should better always turn the volume up and
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* use line control. I got the best results by connecting line output
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* to the sound card microphone input. For such a configuration the
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* volume control has no effect, since volume control only influences
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* the speaker output.
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*
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* There is no explicit mute/unmute. So I set the radio frequency to a
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* value where I do expect just noise and turn the speaker volume down.
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* The frequency change is necessary since the card never seems to be
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* completely silent.
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2006-08-08 06:10:04 -06:00
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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2005-04-16 16:20:36 -06:00
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*/
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#include <linux/module.h> /* Modules */
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#include <linux/init.h> /* Initdata */
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2005-09-13 02:25:15 -06:00
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#include <linux/ioport.h> /* request_region */
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2005-04-16 16:20:36 -06:00
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#include <linux/proc_fs.h> /* radio card status report */
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#include <asm/io.h> /* outb, outb_p */
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#include <asm/uaccess.h> /* copy to/from user */
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2006-08-08 06:10:04 -06:00
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#include <linux/videodev2.h> /* kernel radio structs */
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2006-06-05 07:26:32 -06:00
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#include <media/v4l2-common.h>
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2005-04-16 16:20:36 -06:00
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2006-08-08 06:10:04 -06:00
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#define RADIO_VERSION KERNEL_VERSION(0,1,1)
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#define BANNER "Typhoon Radio Card driver v0.1.1\n"
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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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.id = V4L2_CID_AUDIO_VOLUME,
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.name = "Volume",
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.minimum = 0,
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.maximum = 65535,
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.step = 1<<14,
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.default_value = 0xff,
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.type = V4L2_CTRL_TYPE_INTEGER,
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}
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};
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2005-04-16 16:20:36 -06:00
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#ifndef CONFIG_RADIO_TYPHOON_PORT
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#define CONFIG_RADIO_TYPHOON_PORT -1
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#endif
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#ifndef CONFIG_RADIO_TYPHOON_MUTEFREQ
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#define CONFIG_RADIO_TYPHOON_MUTEFREQ 0
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#endif
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#ifndef CONFIG_PROC_FS
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#undef CONFIG_RADIO_TYPHOON_PROC_FS
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#endif
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struct typhoon_device {
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int users;
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int iobase;
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int curvol;
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int muted;
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unsigned long curfreq;
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unsigned long mutefreq;
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2006-02-07 01:49:14 -07:00
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struct mutex lock;
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2005-04-16 16:20:36 -06:00
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};
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static void typhoon_setvol_generic(struct typhoon_device *dev, int vol);
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static int typhoon_setfreq_generic(struct typhoon_device *dev,
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unsigned long frequency);
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static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency);
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static void typhoon_mute(struct typhoon_device *dev);
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static void typhoon_unmute(struct typhoon_device *dev);
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static int typhoon_setvol(struct typhoon_device *dev, int vol);
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static int typhoon_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg);
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#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
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static int typhoon_get_info(char *buf, char **start, off_t offset, int len);
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#endif
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static void typhoon_setvol_generic(struct typhoon_device *dev, int vol)
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{
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2006-02-07 01:49:14 -07:00
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mutex_lock(&dev->lock);
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2005-04-16 16:20:36 -06:00
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vol >>= 14; /* Map 16 bit to 2 bit */
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vol &= 3;
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outb_p(vol / 2, dev->iobase); /* Set the volume, high bit. */
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outb_p(vol % 2, dev->iobase + 2); /* Set the volume, low bit. */
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2006-02-07 01:49:14 -07:00
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mutex_unlock(&dev->lock);
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2005-04-16 16:20:36 -06:00
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}
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static int typhoon_setfreq_generic(struct typhoon_device *dev,
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unsigned long frequency)
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{
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unsigned long outval;
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unsigned long x;
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/*
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* The frequency transfer curve is not linear. The best fit I could
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* get is
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*
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* outval = -155 + exp((f + 15.55) * 0.057))
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*
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* where frequency f is in MHz. Since we don't have exp in the kernel,
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* I approximate this function by a third order polynomial.
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*
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*/
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2006-02-07 01:49:14 -07:00
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mutex_lock(&dev->lock);
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2005-04-16 16:20:36 -06:00
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x = frequency / 160;
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outval = (x * x + 2500) / 5000;
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outval = (outval * x + 5000) / 10000;
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outval -= (10 * x * x + 10433) / 20866;
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outval += 4 * x - 11505;
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outb_p((outval >> 8) & 0x01, dev->iobase + 4);
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outb_p(outval >> 9, dev->iobase + 6);
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outb_p(outval & 0xff, dev->iobase + 8);
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2006-02-07 01:49:14 -07:00
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mutex_unlock(&dev->lock);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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static int typhoon_setfreq(struct typhoon_device *dev, unsigned long frequency)
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{
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typhoon_setfreq_generic(dev, frequency);
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dev->curfreq = frequency;
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return 0;
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}
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static void typhoon_mute(struct typhoon_device *dev)
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{
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if (dev->muted == 1)
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return;
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typhoon_setvol_generic(dev, 0);
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typhoon_setfreq_generic(dev, dev->mutefreq);
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dev->muted = 1;
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}
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static void typhoon_unmute(struct typhoon_device *dev)
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{
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if (dev->muted == 0)
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return;
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typhoon_setfreq_generic(dev, dev->curfreq);
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typhoon_setvol_generic(dev, dev->curvol);
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dev->muted = 0;
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}
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static int typhoon_setvol(struct typhoon_device *dev, int vol)
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{
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if (dev->muted && vol != 0) { /* user is unmuting the card */
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dev->curvol = vol;
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typhoon_unmute(dev);
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return 0;
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}
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if (vol == dev->curvol) /* requested volume == current */
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return 0;
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if (vol == 0) { /* volume == 0 means mute the card */
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typhoon_mute(dev);
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dev->curvol = vol;
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return 0;
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}
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typhoon_setvol_generic(dev, vol);
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dev->curvol = vol;
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return 0;
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}
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static int typhoon_do_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, void *arg)
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{
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struct video_device *dev = video_devdata(file);
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struct typhoon_device *typhoon = dev->priv;
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switch (cmd) {
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2006-08-08 06:10:04 -06:00
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case VIDIOC_QUERYCAP:
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2005-04-16 16:20:36 -06:00
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{
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2006-08-08 06:10:04 -06:00
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struct v4l2_capability *v = arg;
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2005-04-16 16:20:36 -06:00
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memset(v,0,sizeof(*v));
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2006-08-08 06:10:04 -06:00
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strlcpy(v->driver, "radio-typhoon", sizeof (v->driver));
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strlcpy(v->card, "Typhoon 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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2005-04-16 16:20:36 -06:00
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return 0;
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}
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2006-08-08 06:10:04 -06:00
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case VIDIOC_G_TUNER:
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2005-04-16 16:20:36 -06:00
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{
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2006-08-08 06:10:04 -06:00
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struct v4l2_tuner *v = arg;
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if (v->index > 0)
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2005-04-16 16:20:36 -06:00
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return -EINVAL;
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2006-08-08 06:10:04 -06:00
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memset(v,0,sizeof(*v));
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2005-04-16 16:20:36 -06:00
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strcpy(v->name, "FM");
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2006-08-08 06:10:04 -06:00
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v->type = V4L2_TUNER_RADIO;
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v->rangelow=(87.5*16000);
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v->rangehigh=(108*16000);
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v->rxsubchans =V4L2_TUNER_SUB_MONO;
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v->capability=V4L2_TUNER_CAP_LOW;
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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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2005-04-16 16:20:36 -06:00
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return 0;
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}
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2006-08-08 06:10:04 -06:00
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case VIDIOC_S_TUNER:
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2005-04-16 16:20:36 -06:00
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{
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2006-08-08 06:10:04 -06:00
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struct v4l2_tuner *v = arg;
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if (v->index > 0)
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2005-04-16 16:20:36 -06:00
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return -EINVAL;
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2006-08-08 06:10:04 -06:00
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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2006-08-08 06:10:04 -06:00
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case VIDIOC_S_FREQUENCY:
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2005-04-16 16:20:36 -06:00
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{
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2006-08-08 06:10:04 -06:00
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struct v4l2_frequency *f = arg;
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typhoon->curfreq = f->frequency;
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typhoon_setfreq(typhoon, typhoon->curfreq);
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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2006-08-08 06:10:04 -06:00
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case VIDIOC_G_FREQUENCY:
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2005-04-16 16:20:36 -06:00
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{
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2006-08-08 06:10:04 -06:00
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struct v4l2_frequency *f = arg;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = typhoon->curfreq;
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2005-04-16 16:20:36 -06:00
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return 0;
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}
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2006-08-08 06:10:04 -06:00
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case VIDIOC_QUERYCTRL:
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{
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struct v4l2_queryctrl *qc = arg;
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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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case VIDIOC_G_CTRL:
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{
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struct v4l2_control *ctrl= arg;
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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ctrl->value=typhoon->muted;
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return (0);
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case V4L2_CID_AUDIO_VOLUME:
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ctrl->value=typhoon->curvol;
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return (0);
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}
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return -EINVAL;
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}
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case VIDIOC_S_CTRL:
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{
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struct v4l2_control *ctrl= arg;
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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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typhoon_mute(typhoon);
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} else {
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typhoon_unmute(typhoon);
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}
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return (0);
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case V4L2_CID_AUDIO_VOLUME:
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typhoon_setvol(typhoon, ctrl->value);
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return (0);
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}
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return -EINVAL;
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}
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default:
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return v4l_compat_translate_ioctl(inode,file,cmd,arg,
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typhon_do_ioctl);
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2005-04-16 16:20:36 -06:00
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}
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}
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static int typhoon_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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{
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return video_usercopy(inode, file, cmd, arg, typhoon_do_ioctl);
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}
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static struct typhoon_device typhoon_unit =
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{
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.iobase = CONFIG_RADIO_TYPHOON_PORT,
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.curfreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
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.mutefreq = CONFIG_RADIO_TYPHOON_MUTEFREQ,
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};
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static struct file_operations typhoon_fops = {
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.owner = THIS_MODULE,
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.open = video_exclusive_open,
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.release = video_exclusive_release,
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.ioctl = typhoon_ioctl,
|
2006-01-09 10:24:57 -07:00
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.compat_ioctl = v4l_compat_ioctl32,
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2005-04-16 16:20:36 -06:00
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.llseek = no_llseek,
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};
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static struct video_device typhoon_radio =
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{
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.owner = THIS_MODULE,
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.name = "Typhoon Radio",
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.type = VID_TYPE_TUNER,
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2006-08-08 06:10:04 -06:00
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.hardware = 0,
|
2005-04-16 16:20:36 -06:00
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.fops = &typhoon_fops,
|
|
|
|
};
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|
|
|
|
|
|
|
#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
|
|
|
|
|
|
|
|
static int typhoon_get_info(char *buf, char **start, off_t offset, int len)
|
|
|
|
{
|
|
|
|
char *out = buf;
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
#define MODULEPROCSTRING "Driver loaded as a module"
|
|
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|
#else
|
|
|
|
#define MODULEPROCSTRING "Driver compiled into kernel"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* output must be kept under PAGE_SIZE */
|
|
|
|
out += sprintf(out, BANNER);
|
|
|
|
out += sprintf(out, "Load type: " MODULEPROCSTRING "\n\n");
|
|
|
|
out += sprintf(out, "frequency = %lu kHz\n",
|
|
|
|
typhoon_unit.curfreq >> 4);
|
|
|
|
out += sprintf(out, "volume = %d\n", typhoon_unit.curvol);
|
|
|
|
out += sprintf(out, "mute = %s\n", typhoon_unit.muted ?
|
|
|
|
"on" : "off");
|
|
|
|
out += sprintf(out, "iobase = 0x%x\n", typhoon_unit.iobase);
|
|
|
|
out += sprintf(out, "mute frequency = %lu kHz\n",
|
|
|
|
typhoon_unit.mutefreq >> 4);
|
|
|
|
return out - buf;
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* CONFIG_RADIO_TYPHOON_PROC_FS */
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Dr. Henrik Seidel");
|
|
|
|
MODULE_DESCRIPTION("A driver for the Typhoon radio card (a.k.a. EcoRadio).");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
|
|
static int io = -1;
|
|
|
|
static int radio_nr = -1;
|
|
|
|
|
|
|
|
module_param(io, int, 0);
|
|
|
|
MODULE_PARM_DESC(io, "I/O address of the Typhoon card (0x316 or 0x336)");
|
|
|
|
module_param(radio_nr, int, 0);
|
|
|
|
|
|
|
|
#ifdef MODULE
|
|
|
|
static unsigned long mutefreq = 0;
|
|
|
|
module_param(mutefreq, ulong, 0);
|
|
|
|
MODULE_PARM_DESC(mutefreq, "Frequency used when muting the card (in kHz)");
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static int __init typhoon_init(void)
|
|
|
|
{
|
|
|
|
#ifdef MODULE
|
|
|
|
if (io == -1) {
|
|
|
|
printk(KERN_ERR "radio-typhoon: You must set an I/O address with io=0x316 or io=0x336\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
typhoon_unit.iobase = io;
|
|
|
|
|
|
|
|
if (mutefreq < 87000 || mutefreq > 108500) {
|
|
|
|
printk(KERN_ERR "radio-typhoon: You must set a frequency (in kHz) used when muting the card,\n");
|
|
|
|
printk(KERN_ERR "radio-typhoon: e.g. with \"mutefreq=87500\" (87000 <= mutefreq <= 108500)\n");
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
typhoon_unit.mutefreq = mutefreq;
|
|
|
|
#endif /* MODULE */
|
|
|
|
|
|
|
|
printk(KERN_INFO BANNER);
|
2006-02-07 01:49:14 -07:00
|
|
|
mutex_init(&typhoon_unit.lock);
|
2005-04-16 16:20:36 -06:00
|
|
|
io = typhoon_unit.iobase;
|
|
|
|
if (!request_region(io, 8, "typhoon")) {
|
|
|
|
printk(KERN_ERR "radio-typhoon: port 0x%x already in use\n",
|
|
|
|
typhoon_unit.iobase);
|
|
|
|
return -EBUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
typhoon_radio.priv = &typhoon_unit;
|
|
|
|
if (video_register_device(&typhoon_radio, VFL_TYPE_RADIO, radio_nr) == -1)
|
|
|
|
{
|
|
|
|
release_region(io, 8);
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
printk(KERN_INFO "radio-typhoon: port 0x%x.\n", typhoon_unit.iobase);
|
|
|
|
printk(KERN_INFO "radio-typhoon: mute frequency is %lu kHz.\n",
|
|
|
|
typhoon_unit.mutefreq);
|
|
|
|
typhoon_unit.mutefreq <<= 4;
|
|
|
|
|
|
|
|
/* mute card - prevents noisy bootups */
|
|
|
|
typhoon_mute(&typhoon_unit);
|
|
|
|
|
|
|
|
#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
|
|
|
|
if (!create_proc_info_entry("driver/radio-typhoon", 0, NULL,
|
2006-04-08 13:06:16 -06:00
|
|
|
typhoon_get_info))
|
2006-06-19 21:30:57 -06:00
|
|
|
printk(KERN_ERR "radio-typhoon: registering /proc/driver/radio-typhoon failed\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
#endif
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit typhoon_cleanup_module(void)
|
|
|
|
{
|
|
|
|
|
|
|
|
#ifdef CONFIG_RADIO_TYPHOON_PROC_FS
|
|
|
|
remove_proc_entry("driver/radio-typhoon", NULL);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
video_unregister_device(&typhoon_radio);
|
|
|
|
release_region(io, 8);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(typhoon_init);
|
|
|
|
module_exit(typhoon_cleanup_module);
|
|
|
|
|