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/* SF16FMI radio driver for Linux radio support
* heavily based on rtrack driver...
* (c) 1997 M. Kirkwood
* (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
*
* Fitted to new interface by Alan Cox <alan.cox@linux.org>
* Made working and cleaned up functions <mikael.hedin@irf.se>
* Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
*
* Notes on the hardware
*
* Frequency control is done digitally -- ie out(port,encodefreq(95.8));
* No volume control - only mute/unmute - you have to use line volume
* control on SB-part of SF16FMI
*
*/
#include <linux/kernel.h> /* __setup */
#include <linux/module.h> /* Modules */
#include <linux/init.h> /* Initdata */
#include <linux/ioport.h> /* check_region, request_region */
#include <linux/delay.h> /* udelay */
#include <linux/videodev.h> /* kernel radio structs */
#include <linux/isapnp.h>
#include <asm/io.h> /* outb, outb_p */
#include <asm/uaccess.h> /* copy to/from user */
#include <asm/semaphore.h>
struct fmi_device
{
int port;
int curvol; /* 1 or 0 */
unsigned long curfreq; /* freq in kHz */
__u32 flags;
};
static int io = -1;
static int radio_nr = -1;
static int users = 0;
static struct pci_dev *dev = NULL;
static struct semaphore lock;
/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
/* It is only useful to give freq in intervall of 800 (=0.05Mhz),
* other bits will be truncated, e.g 92.7400016 -> 92.7, but
* 92.7400017 -> 92.75
*/
#define RSF16_ENCODE(x) ((x)/800+214)
#define RSF16_MINFREQ 87*16000
#define RSF16_MAXFREQ 108*16000
static void outbits(int bits, unsigned int data, int port)
{
while(bits--) {
if(data & 1) {
outb(5, port);
udelay(6);
outb(7, port);
udelay(6);
} else {
outb(1, port);
udelay(6);
outb(3, port);
udelay(6);
}
data>>=1;
}
}
static inline void fmi_mute(int port)
{
down(&lock);
outb(0x00, port);
up(&lock);
}
static inline void fmi_unmute(int port)
{
down(&lock);
outb(0x08, port);
up(&lock);
}
static inline int fmi_setfreq(struct fmi_device *dev)
{
int myport = dev->port;
unsigned long freq = dev->curfreq;
int i;
down(&lock);
outbits(16, RSF16_ENCODE(freq), myport);
outbits(8, 0xC0, myport);
for(i=0; i< 100; i++)
{
udelay(1400);
if(current->need_resched)
schedule();
}
/* If this becomes allowed use it ...
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ/7);
*/
up(&lock);
if (dev->curvol) fmi_unmute(myport);
return 0;
}
static inline int fmi_getsigstr(struct fmi_device *dev)
{
int val;
int res;
int myport = dev->port;
int i;
down(&lock);
val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
outb(val, myport);
outb(val | 0x10, myport);
for(i=0; i< 100; i++)
{
udelay(1400);
if(current->need_resched)
schedule();
}
/* If this becomes allowed use it ...
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(HZ/7);
*/
res = (int)inb(myport+1);
outb(val, myport);
up(&lock);
return (res & 2) ? 0 : 0xFFFF;
}
static int fmi_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
{
struct fmi_device *fmi=dev->priv;
switch(cmd)
{
case VIDIOCGCAP:
{
struct video_capability v;
strcpy(v.name, "SF16-FMx radio");
v.type=VID_TYPE_TUNER;
v.channels=1;
v.audios=1;
/* No we don't do pictures */
v.maxwidth=0;
v.maxheight=0;
v.minwidth=0;
v.minheight=0;
if(copy_to_user(arg,&v,sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCGTUNER:
{
struct video_tuner v;
int mult;
if(copy_from_user(&v, arg,sizeof(v))!=0)
return -EFAULT;
if(v.tuner) /* Only 1 tuner */
return -EINVAL;
strcpy(v.name, "FM");
mult = (fmi->flags & VIDEO_TUNER_LOW) ? 1 : 1000;
v.rangelow = RSF16_MINFREQ/mult;
v.rangehigh = RSF16_MAXFREQ/mult;
v.flags=fmi->flags;
v.mode=VIDEO_MODE_AUTO;
v.signal = fmi_getsigstr(fmi);
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSTUNER:
{
struct video_tuner v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.tuner!=0)
return -EINVAL;
fmi->flags = v.flags & VIDEO_TUNER_LOW;
/* Only 1 tuner so no setting needed ! */
return 0;
}
case VIDIOCGFREQ:
{
unsigned long tmp = fmi->curfreq;
if (!(fmi->flags & VIDEO_TUNER_LOW))
tmp /= 1000;
if(copy_to_user(arg, &tmp, sizeof(tmp)))
return -EFAULT;
return 0;
}
case VIDIOCSFREQ:
{
unsigned long tmp;
if(copy_from_user(&tmp, arg, sizeof(tmp)))
return -EFAULT;
if (!(fmi->flags & VIDEO_TUNER_LOW))
tmp *= 1000;
if ( tmp<RSF16_MINFREQ || tmp>RSF16_MAXFREQ )
return -EINVAL;
/*rounding in steps of 800 to match th freq
that will be used */
fmi->curfreq = (tmp/800)*800;
fmi_setfreq(fmi);
return 0;
}
case VIDIOCGAUDIO:
{
struct video_audio v;
v.audio=0;
v.volume=0;
v.bass=0;
v.treble=0;
v.flags=( (!fmi->curvol)*VIDEO_AUDIO_MUTE | VIDEO_AUDIO_MUTABLE);
strcpy(v.name, "Radio");
v.mode=VIDEO_SOUND_STEREO;
v.balance=0;
v.step=0; /* No volume, just (un)mute */
if(copy_to_user(arg,&v, sizeof(v)))
return -EFAULT;
return 0;
}
case VIDIOCSAUDIO:
{
struct video_audio v;
if(copy_from_user(&v, arg, sizeof(v)))
return -EFAULT;
if(v.audio)
return -EINVAL;
fmi->curvol= v.flags&VIDEO_AUDIO_MUTE ? 0 : 1;
fmi->curvol ?
fmi_unmute(fmi->port) : fmi_mute(fmi->port);
return 0;
}
case VIDIOCGUNIT:
{
struct video_unit v;
v.video=VIDEO_NO_UNIT;
v.vbi=VIDEO_NO_UNIT;
v.radio=dev->minor;
v.audio=0; /* How do we find out this??? */
v.teletext=VIDEO_NO_UNIT;
if(copy_to_user(arg, &v, sizeof(v)))
return -EFAULT;
return 0;
}
default:
return -ENOIOCTLCMD;
}
}
static int fmi_open(struct video_device *dev, int flags)
{
if(users)
return -EBUSY;
users++;
return 0;
}
static void fmi_close(struct video_device *dev)
{
users--;
}
static struct fmi_device fmi_unit;
static struct video_device fmi_radio=
{
owner: THIS_MODULE,
name: "SF16FMx radio",
type: VID_TYPE_TUNER,
hardware: VID_HARDWARE_SF16MI,
open: fmi_open,
close: fmi_close,
ioctl: fmi_ioctl,
};
/* ladis: this is my card. does any other types exist? */
static struct isapnp_device_id id_table[] __devinitdata = {
{ ISAPNP_ANY_ID, ISAPNP_ANY_ID,
ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
{ ISAPNP_CARD_END, },
};
MODULE_DEVICE_TABLE(isapnp, id_table);
static int isapnp_fmi_probe(void)
{
int i = 0;
while (id_table[i].card_vendor != 0 && dev == NULL) {
dev = isapnp_find_dev(NULL, id_table[i].vendor,
id_table[i].function, NULL);
i++;
}
if (!dev)
return -ENODEV;
if (dev->prepare(dev) < 0)
return -EAGAIN;
if (!(dev->resource[0].flags & IORESOURCE_IO))
return -ENODEV;
if (dev->activate(dev) < 0) {
printk ("radio-sf16fmi: ISAPnP configure failed (out of resources?)\n");
return -ENOMEM;
}
i = dev->resource[0].start;
printk ("radio-sf16fmi: ISAPnP reports card at %#x\n", i);
return i;
}
static int __init fmi_init(void)
{
if (io < 0)
io = isapnp_fmi_probe();
if (io < 0) {
printk(KERN_ERR "radio-sf16fmi: No PnP card found.");
return io;
}
if (!request_region(io, 2, "radio-sf16fmi")) {
printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
return -EBUSY;
}
fmi_unit.port = io;
fmi_unit.curvol = 0;
fmi_unit.curfreq = 0;
fmi_unit.flags = VIDEO_TUNER_LOW;
fmi_radio.priv = &fmi_unit;
init_MUTEX(&lock);
if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) {
release_region(io, 2);
return -EINVAL;
}
printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
/* mute card - prevents noisy bootups */
fmi_mute(io);
return 0;
}
MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
MODULE_DESCRIPTION("A driver for the SF16MI radio.");
MODULE_LICENSE("GPL");
MODULE_PARM(io, "i");
MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
MODULE_PARM(radio_nr, "i");
EXPORT_NO_SYMBOLS;
static void __exit fmi_cleanup_module(void)
{
video_unregister_device(&fmi_radio);
release_region(io, 2);
if (dev)
dev->deactivate(dev);
}
module_init(fmi_init);
module_exit(fmi_cleanup_module);
#ifndef MODULE
static int __init fmi_setup_io(char *str)
{
get_option(&str, &io);
return 1;
}
__setup("sf16fm=", fmi_setup_io);
#endif
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