336 lines
6.6 KiB
C
336 lines
6.6 KiB
C
/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
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*
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* Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
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* Converted to new API by Alan Cox <Alan.Cox@linux.org>
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* Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
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*
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* TODO: Allow for more than one of these foolish entities :-)
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*
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* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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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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#include <linux/ioport.h> /* request_region */
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#include <linux/delay.h> /* udelay */
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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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#include <linux/videodev2.h> /* kernel radio structs */
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#include <media/v4l2-common.h>
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#include <linux/spinlock.h>
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#include <linux/version.h> /* for KERNEL_VERSION MACRO */
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#define RADIO_VERSION KERNEL_VERSION(0,0,2)
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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 = 65535,
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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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#ifndef CONFIG_RADIO_RTRACK2_PORT
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#define CONFIG_RADIO_RTRACK2_PORT -1
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#endif
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static int io = CONFIG_RADIO_RTRACK2_PORT;
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static int radio_nr = -1;
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static spinlock_t lock;
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struct rt_device
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{
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int port;
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unsigned long curfreq;
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int muted;
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};
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/* local things */
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static void rt_mute(struct rt_device *dev)
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{
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if(dev->muted)
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return;
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spin_lock(&lock);
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outb(1, io);
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spin_unlock(&lock);
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dev->muted = 1;
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}
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static void rt_unmute(struct rt_device *dev)
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{
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if(dev->muted == 0)
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return;
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spin_lock(&lock);
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outb(0, io);
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spin_unlock(&lock);
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dev->muted = 0;
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}
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static void zero(void)
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{
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outb_p(1, io);
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outb_p(3, io);
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outb_p(1, io);
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}
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static void one(void)
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{
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outb_p(5, io);
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outb_p(7, io);
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outb_p(5, io);
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}
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static int rt_setfreq(struct rt_device *dev, unsigned long freq)
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{
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int i;
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freq = freq / 200 + 856;
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spin_lock(&lock);
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outb_p(0xc8, io);
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outb_p(0xc9, io);
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outb_p(0xc9, io);
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for (i = 0; i < 10; i++)
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zero ();
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for (i = 14; i >= 0; i--)
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if (freq & (1 << i))
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one ();
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else
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zero ();
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outb_p(0xc8, io);
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if (!dev->muted)
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outb_p(0, io);
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spin_unlock(&lock);
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return 0;
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}
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static int rt_getsigstr(struct rt_device *dev)
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{
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if (inb(io) & 2) /* bit set = no signal present */
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return 0;
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return 1; /* signal present */
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}
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static int rt_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 rt_device *rt=dev->priv;
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switch(cmd)
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{
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case VIDIOC_QUERYCAP:
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{
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struct v4l2_capability *v = arg;
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memset(v,0,sizeof(*v));
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strlcpy(v->driver, "radio-rtrack2", sizeof (v->driver));
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strlcpy(v->card, "RadioTrack II", 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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case VIDIOC_G_TUNER:
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{
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struct v4l2_tuner *v = arg;
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if (v->index > 0)
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return -EINVAL;
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memset(v,0,sizeof(*v));
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strcpy(v->name, "FM");
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v->type = V4L2_TUNER_RADIO;
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v->rangelow=(88*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*rt_getsigstr(rt);
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return 0;
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}
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case VIDIOC_S_TUNER:
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{
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struct v4l2_tuner *v = arg;
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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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case VIDIOC_S_FREQUENCY:
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{
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struct v4l2_frequency *f = arg;
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rt->curfreq = f->frequency;
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rt_setfreq(rt, rt->curfreq);
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return 0;
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}
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case VIDIOC_G_FREQUENCY:
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{
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struct v4l2_frequency *f = arg;
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f->type = V4L2_TUNER_RADIO;
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f->frequency = rt->curfreq;
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return 0;
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}
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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=rt->muted;
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return (0);
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case V4L2_CID_AUDIO_VOLUME:
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if (rt->muted)
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ctrl->value=0;
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else
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ctrl->value=65535;
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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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rt_mute(rt);
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} else {
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rt_unmute(rt);
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}
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return (0);
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case V4L2_CID_AUDIO_VOLUME:
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if (ctrl->value) {
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rt_unmute(rt);
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} else {
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rt_mute(rt);
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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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default:
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return v4l_compat_translate_ioctl(inode,file,cmd,arg,
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rt_do_ioctl);
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}
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}
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static int rt_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, rt_do_ioctl);
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}
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static struct rt_device rtrack2_unit;
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static const struct file_operations rtrack2_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 = rt_ioctl,
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.compat_ioctl = v4l_compat_ioctl32,
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.llseek = no_llseek,
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};
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static struct video_device rtrack2_radio=
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{
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.owner = THIS_MODULE,
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.name = "RadioTrack II radio",
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.type = VID_TYPE_TUNER,
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.hardware = 0,
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.fops = &rtrack2_fops,
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};
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static int __init rtrack2_init(void)
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{
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if(io==-1)
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{
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printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
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return -EINVAL;
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}
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if (!request_region(io, 4, "rtrack2"))
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{
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printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
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return -EBUSY;
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}
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rtrack2_radio.priv=&rtrack2_unit;
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spin_lock_init(&lock);
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if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
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{
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release_region(io, 4);
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return -EINVAL;
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}
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printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
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/* mute card - prevents noisy bootups */
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outb(1, io);
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rtrack2_unit.muted = 1;
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return 0;
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}
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MODULE_AUTHOR("Ben Pfaff");
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MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
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MODULE_LICENSE("GPL");
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module_param(io, int, 0);
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MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
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module_param(radio_nr, int, 0);
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static void __exit rtrack2_cleanup_module(void)
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{
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video_unregister_device(&rtrack2_radio);
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release_region(io,4);
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}
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module_init(rtrack2_init);
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module_exit(rtrack2_cleanup_module);
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/*
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Local variables:
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compile-command: "mmake"
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End:
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*/
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