Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 304 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-gemtek.c b/drivers/media/radio/radio-gemtek.c
new file mode 100644
index 000000000000..202bfe6819b8
--- /dev/null
+++ b/drivers/media/radio/radio-gemtek.c
@@ -0,0 +1,304 @@
+/* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
+ *
+ * GemTek hasn't released any specs on the card, so the protocol had to
+ * be reverse engineered with dosemu.
+ *
+ * Besides the protocol changes, this is mostly a copy of:
+ *
+ *    RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
+ * 
+ *    Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
+ *    Converted to new API by Alan Cox <Alan.Cox@linux.org>
+ *    Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
+ *
+ * TODO: Allow for more than one of these foolish entities :-)
+ *
+ */
+
+#include <linux/module.h>       /* Modules                      */
+#include <linux/init.h>         /* Initdata                     */
+#include <linux/ioport.h>       /* check_region, request_region */
+#include <linux/delay.h>        /* udelay                       */
+#include <asm/io.h>             /* outb, outb_p                 */
+#include <asm/uaccess.h>        /* copy to/from user            */
+#include <linux/videodev.h>     /* kernel radio structs         */
+#include <linux/config.h>       /* CONFIG_RADIO_GEMTEK_PORT     */
+#include <linux/spinlock.h>
+
+#ifndef CONFIG_RADIO_GEMTEK_PORT
+#define CONFIG_RADIO_GEMTEK_PORT -1
+#endif
+
+static int io = CONFIG_RADIO_GEMTEK_PORT; 
+static int radio_nr = -1;
+static spinlock_t lock;
+
+struct gemtek_device
+{
+        int port;
+        unsigned long curfreq;
+        int muted;
+};
+
+
+/* local things */
+
+/* the correct way to mute the gemtek may be to write the last written
+ * frequency || 0x10, but just writing 0x10 once seems to do it as well
+ */
+static void gemtek_mute(struct gemtek_device *dev)
+{
+        if(dev->muted)
+                return;
+        spin_lock(&lock);
+        outb(0x10, io);
+        spin_unlock(&lock);
+        dev->muted = 1;
+}
+
+static void gemtek_unmute(struct gemtek_device *dev)
+{
+        if(dev->muted == 0)
+                return;
+        spin_lock(&lock);
+        outb(0x20, io);
+        spin_unlock(&lock);
+        dev->muted = 0;
+}
+
+static void zero(void)
+{
+        outb_p(0x04, io);
+        udelay(5);
+        outb_p(0x05, io);
+        udelay(5);
+}
+
+static void one(void)
+{
+        outb_p(0x06, io);
+        udelay(5);
+        outb_p(0x07, io);
+        udelay(5);
+}
+
+static int gemtek_setfreq(struct gemtek_device *dev, unsigned long freq)
+{
+        int i;
+
+/*        freq = 78.25*((float)freq/16000.0 + 10.52); */
+
+        freq /= 16;
+        freq += 10520;
+        freq *= 7825;
+        freq /= 100000;
+
+        spin_lock(&lock);
+        
+        /* 2 start bits */
+        outb_p(0x03, io);
+        udelay(5);
+        outb_p(0x07, io);
+        udelay(5);
+
+        /* 28 frequency bits (lsb first) */
+        for (i = 0; i < 14; i++)
+                if (freq & (1 << i))
+                        one();
+                else
+                        zero();
+        /* 36 unknown bits */
+        for (i = 0; i < 11; i++)
+                zero();
+        one();
+        for (i = 0; i < 4; i++)
+                zero();
+        one();
+        zero();
+
+        /* 2 end bits */
+        outb_p(0x03, io);
+        udelay(5);
+        outb_p(0x07, io);
+        udelay(5);
+
+        spin_unlock(&lock);
+        
+        return 0;
+}
+
+static int gemtek_getsigstr(struct gemtek_device *dev)
+{
+        spin_lock(&lock);
+        inb(io);
+        udelay(5);
+        spin_unlock(&lock);
+        if (inb(io) & 8)                /* bit set = no signal present */
+                return 0;
+        return 1;               /* signal present */
+}
+
+static int gemtek_do_ioctl(struct inode *inode, struct file *file,
+                           unsigned int cmd, void *arg)
+{
+        struct video_device *dev = video_devdata(file);
+        struct gemtek_device *rt=dev->priv;
+
+        switch(cmd)
+        {
+                case VIDIOCGCAP:
+                {
+                        struct video_capability *v = arg;
+                        memset(v,0,sizeof(*v));
+                        v->type=VID_TYPE_TUNER;
+                        v->channels=1;
+                        v->audios=1;
+                        strcpy(v->name, "GemTek");
+                        return 0;
+                }
+                case VIDIOCGTUNER:
+                {
+                        struct video_tuner *v = arg;
+                        if(v->tuner)    /* Only 1 tuner */ 
+                                return -EINVAL;
+                        v->rangelow=87*16000;
+                        v->rangehigh=108*16000;
+                        v->flags=VIDEO_TUNER_LOW;
+                        v->mode=VIDEO_MODE_AUTO;
+                        v->signal=0xFFFF*gemtek_getsigstr(rt);
+                        strcpy(v->name, "FM");
+                        return 0;
+                }
+                case VIDIOCSTUNER:
+                {
+                        struct video_tuner *v = arg;
+                        if(v->tuner!=0)
+                                return -EINVAL;
+                        /* Only 1 tuner so no setting needed ! */
+                        return 0;
+                }
+                case VIDIOCGFREQ:
+                {
+                        unsigned long *freq = arg;
+                        *freq = rt->curfreq;
+                        return 0;
+                }
+                case VIDIOCSFREQ:
+                {
+                        unsigned long *freq = arg;
+                        rt->curfreq = *freq;
+                        /* needs to be called twice in order for getsigstr to work */
+                        gemtek_setfreq(rt, rt->curfreq);
+                        gemtek_setfreq(rt, rt->curfreq);
+                        return 0;
+                }
+                case VIDIOCGAUDIO:
+                {       
+                        struct video_audio *v = arg;
+                        memset(v,0, sizeof(*v));
+                        v->flags|=VIDEO_AUDIO_MUTABLE;
+                        v->volume=1;
+                        v->step=65535;
+                        strcpy(v->name, "Radio");
+                        return 0;                       
+                }
+                case VIDIOCSAUDIO:
+                {
+                        struct video_audio *v = arg;
+                        if(v->audio) 
+                                return -EINVAL;
+
+                        if(v->flags&VIDEO_AUDIO_MUTE) 
+                                gemtek_mute(rt);
+                        else
+                                gemtek_unmute(rt);
+
+                        return 0;
+                }
+                default:
+                        return -ENOIOCTLCMD;
+        }
+}
+
+static int gemtek_ioctl(struct inode *inode, struct file *file,
+                        unsigned int cmd, unsigned long arg)
+{
+        return video_usercopy(inode, file, cmd, arg, gemtek_do_ioctl);
+}
+
+static struct gemtek_device gemtek_unit;
+
+static struct file_operations gemtek_fops = {
+        .owner          = THIS_MODULE,
+        .open           = video_exclusive_open,
+        .release        = video_exclusive_release,
+        .ioctl          = gemtek_ioctl,
+        .llseek         = no_llseek,
+};
+
+static struct video_device gemtek_radio=
+{
+        .owner          = THIS_MODULE,
+        .name           = "GemTek radio",
+        .type           = VID_TYPE_TUNER,
+        .hardware       = VID_HARDWARE_GEMTEK,
+        .fops           = &gemtek_fops,
+};
+
+static int __init gemtek_init(void)
+{
+        if(io==-1)
+        {
+                printk(KERN_ERR "You must set an I/O address with io=0x20c, io=0x30c, io=0x24c or io=0x34c (io=0x020c or io=0x248 for the combined sound/radiocard)\n");
+                return -EINVAL;
+        }
+
+        if (!request_region(io, 4, "gemtek")) 
+        {
+                printk(KERN_ERR "gemtek: port 0x%x already in use\n", io);
+                return -EBUSY;
+        }
+
+        gemtek_radio.priv=&gemtek_unit;
+        
+        if(video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr)==-1)
+        {
+                release_region(io, 4);
+                return -EINVAL;
+        }
+        printk(KERN_INFO "GemTek Radio Card driver.\n");
+
+        spin_lock_init(&lock);
+
+        /* this is _maybe_ unnecessary */
+        outb(0x01, io);
+
+        /* mute card - prevents noisy bootups */
+        gemtek_unit.muted = 0;
+        gemtek_mute(&gemtek_unit);
+
+        return 0;
+}
+
+MODULE_AUTHOR("Jonas Munsin");
+MODULE_DESCRIPTION("A driver for the GemTek Radio Card");
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of the GemTek card (0x20c, 0x30c, 0x24c or 0x34c (0x20c or 0x248 have been reported to work for the combined sound/radiocard)).");
+module_param(radio_nr, int, 0);
+
+static void __exit gemtek_cleanup(void)
+{
+        video_unregister_device(&gemtek_radio);
+        release_region(io,4);
+}
+
+module_init(gemtek_init);
+module_exit(gemtek_cleanup);
+
+/*
+  Local variables:
+  compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c"
+  End:
+*/