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 000000000000..53d399b6652b
--- /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);
+