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, 620 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-cadet.c b/drivers/media/radio/radio-cadet.c
new file mode 100644
index 00000000000..53d399b6652
--- /dev/null
+++ b/drivers/media/radio/radio-cadet.c
@@ -0,0 +1,620 @@
+/* radio-cadet.c - A video4linux driver for the ADS Cadet AM/FM Radio Card
+ *
+ * by Fred Gleason <fredg@wava.com>
+ * Version 0.3.3
+ *
+ * (Loosely) based on code for the Aztech radio card by
+ *
+ * Russell Kroll    (rkroll@exploits.org)
+ * Quay Ly
+ * Donald Song
+ * Jason Lewis      (jlewis@twilight.vtc.vsc.edu) 
+ * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
+ * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
+ *
+ * History:
+ * 2000-04-29	Russell Kroll <rkroll@exploits.org>
+ *		Added ISAPnP detection for Linux 2.3/2.4
+ *
+ * 2001-01-10	Russell Kroll <rkroll@exploits.org>
+ *		Removed dead CONFIG_RADIO_CADET_PORT code
+ *		PnP detection on load is now default (no args necessary)
+ *
+ * 2002-01-17	Adam Belay <ambx1@neo.rr.com>
+ *		Updated to latest pnp code
+ *
+ * 2003-01-31	Alan Cox <alan@redhat.com>
+ *		Cleaned up locking, delay code, general odds and ends
+ */
+
+#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/param.h>
+#include <linux/pnp.h>
+
+#define RDS_BUFFER 256
+
+static int io=-1;		/* default to isapnp activation */
+static int radio_nr = -1;
+static int users=0;
+static int curtuner=0;
+static int tunestat=0;
+static int sigstrength=0;
+static wait_queue_head_t read_queue;
+static struct timer_list readtimer;
+static __u8 rdsin=0,rdsout=0,rdsstat=0;
+static unsigned char rdsbuf[RDS_BUFFER];
+static spinlock_t cadet_io_lock;
+
+static int cadet_probe(void);
+
+/*
+ * Signal Strength Threshold Values
+ * The V4L API spec does not define any particular unit for the signal 
+ * strength value.  These values are in microvolts of RF at the tuner's input.
+ */
+static __u16 sigtable[2][4]={{5,10,30,150},{28,40,63,1000}};
+
+static int cadet_getrds(void)
+{
+        int rdsstat=0;
+
+	spin_lock(&cadet_io_lock);
+        outb(3,io);                 /* Select Decoder Control/Status */
+	outb(inb(io+1)&0x7f,io+1);  /* Reset RDS detection */
+	spin_unlock(&cadet_io_lock);
+	
+	msleep(100);
+
+	spin_lock(&cadet_io_lock);	
+        outb(3,io);                 /* Select Decoder Control/Status */
+	if((inb(io+1)&0x80)!=0) {
+	        rdsstat|=VIDEO_TUNER_RDS_ON;
+	}
+	if((inb(io+1)&0x10)!=0) {
+	        rdsstat|=VIDEO_TUNER_MBS_ON;
+	}
+	spin_unlock(&cadet_io_lock);
+	return rdsstat;
+}
+
+static int cadet_getstereo(void)
+{
+	int ret = 0;
+        if(curtuner != 0)	/* Only FM has stereo capability! */
+	        return 0;
+
+	spin_lock(&cadet_io_lock);
+        outb(7,io);          /* Select tuner control */
+	if( (inb(io+1) & 0x40) == 0)
+        	ret = 1;
+        spin_unlock(&cadet_io_lock);
+        return ret;
+}
+
+static unsigned cadet_gettune(void)
+{
+        int curvol,i;
+	unsigned fifo=0;
+
+        /*
+         * Prepare for read
+         */
+
+	spin_lock(&cadet_io_lock);
+	
+        outb(7,io);       /* Select tuner control */
+        curvol=inb(io+1); /* Save current volume/mute setting */
+        outb(0x00,io+1);  /* Ensure WRITE-ENABLE is LOW */
+	tunestat=0xffff;
+
+        /*
+         * Read the shift register
+         */
+        for(i=0;i<25;i++) {
+                fifo=(fifo<<1)|((inb(io+1)>>7)&0x01);
+                if(i<24) {
+                        outb(0x01,io+1);
+			tunestat&=inb(io+1);
+                        outb(0x00,io+1);
+                }
+        }
+
+        /*
+         * Restore volume/mute setting
+         */
+        outb(curvol,io+1);
+	spin_unlock(&cadet_io_lock);
+
+	return fifo;
+}
+
+static unsigned cadet_getfreq(void)
+{
+        int i;
+        unsigned freq=0,test,fifo=0;
+
+	/*
+	 * Read current tuning
+	 */
+	fifo=cadet_gettune();
+
+        /*
+         * Convert to actual frequency
+         */
+	if(curtuner==0) {    /* FM */
+	        test=12500;
+                for(i=0;i<14;i++) {
+                        if((fifo&0x01)!=0) {
+                                freq+=test;
+                        }
+                        test=test<<1;
+                        fifo=fifo>>1;
+                }
+                freq-=10700000;           /* IF frequency is 10.7 MHz */
+                freq=(freq*16)/1000000;   /* Make it 1/16 MHz */
+	}
+	if(curtuner==1) {    /* AM */
+	        freq=((fifo&0x7fff)-2010)*16;
+	}
+
+        return freq;
+}
+
+static void cadet_settune(unsigned fifo)
+{
+        int i;
+	unsigned test;  
+
+	spin_lock(&cadet_io_lock);
+	
+	outb(7,io);                /* Select tuner control */
+	/*
+	 * Write the shift register
+	 */
+	test=0;
+	test=(fifo>>23)&0x02;      /* Align data for SDO */
+	test|=0x1c;                /* SDM=1, SWE=1, SEN=1, SCK=0 */
+	outb(7,io);                /* Select tuner control */
+	outb(test,io+1);           /* Initialize for write */
+	for(i=0;i<25;i++) {
+   	        test|=0x01;              /* Toggle SCK High */
+		outb(test,io+1);
+		test&=0xfe;              /* Toggle SCK Low */
+		outb(test,io+1);
+		fifo=fifo<<1;            /* Prepare the next bit */
+		test=0x1c|((fifo>>23)&0x02);
+		outb(test,io+1);
+	}
+	spin_unlock(&cadet_io_lock);
+}
+
+static void cadet_setfreq(unsigned freq)
+{
+        unsigned fifo;
+        int i,j,test;
+        int curvol;
+
+        /* 
+         * Formulate a fifo command
+         */
+	fifo=0;
+	if(curtuner==0) {    /* FM */
+        	test=102400;
+                freq=(freq*1000)/16;       /* Make it kHz */
+                freq+=10700;               /* IF is 10700 kHz */
+                for(i=0;i<14;i++) {
+                        fifo=fifo<<1;
+                        if(freq>=test) {
+                                fifo|=0x01;
+                                freq-=test;
+                        }
+                        test=test>>1;
+                }
+	}
+	if(curtuner==1) {    /* AM */
+                fifo=(freq/16)+2010;            /* Make it kHz */
+		fifo|=0x100000;            /* Select AM Band */
+	}
+
+        /*
+         * Save current volume/mute setting
+         */
+
+	spin_lock(&cadet_io_lock);
+	outb(7,io);                /* Select tuner control */
+        curvol=inb(io+1); 
+        spin_unlock(&cadet_io_lock);
+
+	/*
+	 * Tune the card
+	 */
+	for(j=3;j>-1;j--) {
+	        cadet_settune(fifo|(j<<16));
+	        
+	        spin_lock(&cadet_io_lock);
+		outb(7,io);         /* Select tuner control */
+		outb(curvol,io+1);
+		spin_unlock(&cadet_io_lock);
+		
+		msleep(100);
+
+		cadet_gettune();
+		if((tunestat & 0x40) == 0) {   /* Tuned */
+		        sigstrength=sigtable[curtuner][j];
+			return;
+		}
+	}
+	sigstrength=0;
+}
+
+
+static int cadet_getvol(void)
+{
+	int ret = 0;
+	
+	spin_lock(&cadet_io_lock);
+	
+        outb(7,io);                /* Select tuner control */
+        if((inb(io + 1) & 0x20) != 0)
+        	ret = 0xffff;
+        
+        spin_unlock(&cadet_io_lock);
+        return ret;
+}
+
+
+static void cadet_setvol(int vol)
+{
+	spin_lock(&cadet_io_lock);
+        outb(7,io);                /* Select tuner control */
+        if(vol>0)
+                outb(0x20,io+1);
+        else
+                outb(0x00,io+1);
+	spin_unlock(&cadet_io_lock);
+}  
+
+static void cadet_handler(unsigned long data)
+{
+	/*
+	 * Service the RDS fifo
+	 */
+
+	if(spin_trylock(&cadet_io_lock))
+	{
+	        outb(0x3,io);       /* Select RDS Decoder Control */
+		if((inb(io+1)&0x20)!=0) {
+		        printk(KERN_CRIT "cadet: RDS fifo overflow\n");
+		}
+		outb(0x80,io);      /* Select RDS fifo */
+		while((inb(io)&0x80)!=0) {
+		        rdsbuf[rdsin]=inb(io+1);
+			if(rdsin==rdsout)
+			        printk(KERN_WARNING "cadet: RDS buffer overflow\n");
+			else
+				rdsin++;
+		}
+		spin_unlock(&cadet_io_lock);
+	}
+
+	/*
+	 * Service pending read
+	 */
+	if( rdsin!=rdsout)
+	        wake_up_interruptible(&read_queue);
+
+	/* 
+	 * Clean up and exit
+	 */
+	init_timer(&readtimer);
+	readtimer.function=cadet_handler;
+	readtimer.data=(unsigned long)0;
+	readtimer.expires=jiffies+(HZ/20);
+	add_timer(&readtimer);
+}
+
+
+
+static ssize_t cadet_read(struct file *file, char __user *data,
+			  size_t count, loff_t *ppos)
+{
+        int i=0;
+	unsigned char readbuf[RDS_BUFFER];
+
+        if(rdsstat==0) {
+		spin_lock(&cadet_io_lock);
+	        rdsstat=1;
+		outb(0x80,io);        /* Select RDS fifo */
+		spin_unlock(&cadet_io_lock);
+		init_timer(&readtimer);
+		readtimer.function=cadet_handler;
+		readtimer.data=(unsigned long)0;
+		readtimer.expires=jiffies+(HZ/20);
+		add_timer(&readtimer);
+	}
+	if(rdsin==rdsout) {
+  	        if (file->f_flags & O_NONBLOCK)
+		        return -EWOULDBLOCK;
+	        interruptible_sleep_on(&read_queue);
+	}		
+	while( i<count && rdsin!=rdsout)
+	        readbuf[i++]=rdsbuf[rdsout++];
+
+	if (copy_to_user(data,readbuf,i))
+	        return -EFAULT;
+	return i;
+}
+
+
+
+static int cadet_do_ioctl(struct inode *inode, struct file *file,
+			  unsigned int cmd, void *arg)
+{
+	switch(cmd)
+	{
+		case VIDIOCGCAP:
+		{
+			struct video_capability *v = arg;
+			memset(v,0,sizeof(*v));
+			v->type=VID_TYPE_TUNER;
+			v->channels=2;
+			v->audios=1;
+			strcpy(v->name, "ADS Cadet");
+			return 0;
+		}
+		case VIDIOCGTUNER:
+		{
+			struct video_tuner *v = arg;
+			if((v->tuner<0)||(v->tuner>1)) {
+				return -EINVAL;
+			}
+			switch(v->tuner) {
+			        case 0:
+			        strcpy(v->name,"FM");
+			        v->rangelow=1400;     /* 87.5 MHz */
+			        v->rangehigh=1728;    /* 108.0 MHz */
+			        v->flags=0;
+			        v->mode=0;
+			        v->mode|=VIDEO_MODE_AUTO;
+			        v->signal=sigstrength;
+			        if(cadet_getstereo()==1) {
+				        v->flags|=VIDEO_TUNER_STEREO_ON;
+			        }
+				v->flags|=cadet_getrds();
+			        break;
+			        case 1:
+			        strcpy(v->name,"AM");
+			        v->rangelow=8320;      /* 520 kHz */
+			        v->rangehigh=26400;    /* 1650 kHz */
+			        v->flags=0;
+			        v->flags|=VIDEO_TUNER_LOW;
+			        v->mode=0;
+			        v->mode|=VIDEO_MODE_AUTO;
+			        v->signal=sigstrength;
+			        break;
+			}
+			return 0;
+		}
+		case VIDIOCSTUNER:
+		{
+			struct video_tuner *v = arg;
+			if((v->tuner<0)||(v->tuner>1)) {
+				return -EINVAL;
+			}
+			curtuner=v->tuner;	
+			return 0;
+		}
+		case VIDIOCGFREQ:
+		{
+		        unsigned long *freq = arg;
+			*freq = cadet_getfreq();
+			return 0;
+		}
+		case VIDIOCSFREQ:
+		{
+		        unsigned long *freq = arg;
+			if((curtuner==0)&&((*freq<1400)||(*freq>1728))) {
+			        return -EINVAL;
+			}
+			if((curtuner==1)&&((*freq<8320)||(*freq>26400))) {
+			        return -EINVAL;
+			}
+			cadet_setfreq(*freq);
+			return 0;
+		}
+		case VIDIOCGAUDIO:
+		{	
+			struct video_audio *v = arg;
+			memset(v,0, sizeof(*v));
+			v->flags=VIDEO_AUDIO_MUTABLE|VIDEO_AUDIO_VOLUME;
+			if(cadet_getstereo()==0) {
+			        v->mode=VIDEO_SOUND_MONO;
+			} else {
+				v->mode=VIDEO_SOUND_STEREO;
+			}
+			v->volume=cadet_getvol();
+			v->step=0xffff;
+			strcpy(v->name, "Radio");
+			return 0;			
+		}
+		case VIDIOCSAUDIO:
+		{
+			struct video_audio *v = arg;
+			if(v->audio) 
+				return -EINVAL;
+			cadet_setvol(v->volume);
+			if(v->flags&VIDEO_AUDIO_MUTE) 
+				cadet_setvol(0);
+			else
+				cadet_setvol(0xffff);
+			return 0;
+		}
+		default:
+			return -ENOIOCTLCMD;
+	}
+}
+
+static int cadet_ioctl(struct inode *inode, struct file *file,
+		       unsigned int cmd, unsigned long arg)
+{
+	return video_usercopy(inode, file, cmd, arg, cadet_do_ioctl);
+}
+
+static int cadet_open(struct inode *inode, struct file *file)
+{
+	if(users)
+		return -EBUSY;
+	users++;
+	init_waitqueue_head(&read_queue);
+	return 0;
+}
+
+static int cadet_release(struct inode *inode, struct file *file)
+{
+	del_timer_sync(&readtimer);
+	rdsstat=0;
+	users--;
+	return 0;
+}
+
+
+static struct file_operations cadet_fops = {
+	.owner		= THIS_MODULE,
+	.open		= cadet_open,
+	.release       	= cadet_release,
+	.read		= cadet_read,
+	.ioctl		= cadet_ioctl,
+	.llseek         = no_llseek,
+};
+
+static struct video_device cadet_radio=
+{
+	.owner		= THIS_MODULE,
+	.name		= "Cadet radio",
+	.type		= VID_TYPE_TUNER,
+	.hardware	= VID_HARDWARE_CADET,
+	.fops           = &cadet_fops,
+};
+
+static struct pnp_device_id cadet_pnp_devices[] = {
+	/* ADS Cadet AM/FM Radio Card */
+	{.id = "MSM0c24", .driver_data = 0},
+	{.id = ""}
+};
+
+MODULE_DEVICE_TABLE(pnp, cadet_pnp_devices);
+
+static int cadet_pnp_probe(struct pnp_dev * dev, const struct pnp_device_id *dev_id)
+{
+	if (!dev)
+		return -ENODEV;
+	/* only support one device */
+	if (io > 0)
+		return -EBUSY;
+
+	if (!pnp_port_valid(dev, 0)) {
+		return -ENODEV;
+	}
+
+	io = pnp_port_start(dev, 0);
+
+	printk ("radio-cadet: PnP reports device at %#x\n", io);
+
+	return io;
+}
+
+static struct pnp_driver cadet_pnp_driver = {
+	.name		= "radio-cadet",
+	.id_table	= cadet_pnp_devices,
+	.probe		= cadet_pnp_probe,
+	.remove		= NULL,
+};
+
+static int cadet_probe(void)
+{
+        static int iovals[8]={0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e};
+	int i;
+
+	for(i=0;i<8;i++) {
+	        io=iovals[i];
+	        if(request_region(io,2, "cadet-probe")>=0) {
+		        cadet_setfreq(1410);
+			if(cadet_getfreq()==1410) {
+				release_region(io, 2);
+			        return io;
+			}
+			release_region(io, 2);
+		}
+	}
+	return -1;
+}
+
+/* 
+ * io should only be set if the user has used something like
+ * isapnp (the userspace program) to initialize this card for us
+ */
+
+static int __init cadet_init(void)
+{
+	spin_lock_init(&cadet_io_lock);
+	
+	/*
+	 *	If a probe was requested then probe ISAPnP first (safest)
+	 */
+	if (io < 0)
+		pnp_register_driver(&cadet_pnp_driver);
+	/*
+	 *	If that fails then probe unsafely if probe is requested
+	 */
+	if(io < 0)
+		io = cadet_probe ();
+
+	/*
+	 *	Else we bail out
+	 */
+	 
+        if(io < 0) {
+#ifdef MODULE        
+		printk(KERN_ERR "You must set an I/O address with io=0x???\n");
+#endif
+	        goto fail;
+	}
+	if (!request_region(io,2,"cadet"))
+		goto fail;
+	if(video_register_device(&cadet_radio,VFL_TYPE_RADIO,radio_nr)==-1) {
+		release_region(io,2);
+		goto fail;
+	}
+	printk(KERN_INFO "ADS Cadet Radio Card at 0x%x\n",io);
+	return 0;
+fail:
+	pnp_unregister_driver(&cadet_pnp_driver);
+	return -1;
+}
+
+
+
+MODULE_AUTHOR("Fred Gleason, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
+MODULE_DESCRIPTION("A driver for the ADS Cadet AM/FM/RDS radio card.");
+MODULE_LICENSE("GPL");
+
+module_param(io, int, 0);
+MODULE_PARM_DESC(io, "I/O address of Cadet card (0x330,0x332,0x334,0x336,0x338,0x33a,0x33c,0x33e)");
+module_param(radio_nr, int, 0);
+
+static void __exit cadet_cleanup_module(void)
+{
+	video_unregister_device(&cadet_radio);
+	release_region(io,2);
+	pnp_unregister_driver(&cadet_pnp_driver);
+}
+
+module_init(cadet_init);
+module_exit(cadet_cleanup_module);
+