![Ingo Molnar](/assets/img/avatar_default.png)
Semaphore to mutex conversion. The conversion was generated via scripts, and the result was validated automatically via a script as well. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
436 lines
9.7 KiB
C
436 lines
9.7 KiB
C
/* SF16FMR2 radio driver for Linux radio support
|
|
* heavily based on fmi driver...
|
|
* (c) 2000-2002 Ziglio Frediano, freddy77@angelfire.com
|
|
*
|
|
* 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
|
|
*
|
|
* For read stereo/mono you must wait 0.1 sec after set frequency and
|
|
* card unmuted so I set frequency on unmute
|
|
* Signal handling seem to work only on autoscanning (not implemented)
|
|
*/
|
|
|
|
#include <linux/module.h> /* Modules */
|
|
#include <linux/init.h> /* Initdata */
|
|
#include <linux/ioport.h> /* 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/mutex.h>
|
|
|
|
static struct mutex lock;
|
|
|
|
#undef DEBUG
|
|
//#define DEBUG 1
|
|
|
|
#ifdef DEBUG
|
|
# define debug_print(s) printk s
|
|
#else
|
|
# define debug_print(s)
|
|
#endif
|
|
|
|
/* this should be static vars for module size */
|
|
struct fmr2_device
|
|
{
|
|
int port;
|
|
int curvol; /* 0-65535, if not volume 0 or 65535 */
|
|
int mute;
|
|
int stereo; /* card is producing stereo audio */
|
|
unsigned long curfreq; /* freq in kHz */
|
|
int card_type;
|
|
__u32 flags;
|
|
};
|
|
|
|
static int io = 0x384;
|
|
static int radio_nr = -1;
|
|
|
|
/* hw precision is 12.5 kHz
|
|
* It is only useful to give freq in intervall of 200 (=0.0125Mhz),
|
|
* other bits will be truncated
|
|
*/
|
|
#define RSF16_ENCODE(x) ((x)/200+856)
|
|
#define RSF16_MINFREQ 87*16000
|
|
#define RSF16_MAXFREQ 108*16000
|
|
|
|
static inline void wait(int n,int port)
|
|
{
|
|
for (;n;--n) inb(port);
|
|
}
|
|
|
|
static void outbits(int bits, unsigned int data, int nWait, int port)
|
|
{
|
|
int bit;
|
|
for(;--bits>=0;) {
|
|
bit = (data>>bits) & 1;
|
|
outb(bit,port);
|
|
wait(nWait,port);
|
|
outb(bit|2,port);
|
|
wait(nWait,port);
|
|
outb(bit,port);
|
|
wait(nWait,port);
|
|
}
|
|
}
|
|
|
|
static inline void fmr2_mute(int port)
|
|
{
|
|
outb(0x00, port);
|
|
wait(4,port);
|
|
}
|
|
|
|
static inline void fmr2_unmute(int port)
|
|
{
|
|
outb(0x04, port);
|
|
wait(4,port);
|
|
}
|
|
|
|
static inline int fmr2_stereo_mode(int port)
|
|
{
|
|
int n = inb(port);
|
|
outb(6,port);
|
|
inb(port);
|
|
n = ((n>>3)&1)^1;
|
|
debug_print((KERN_DEBUG "stereo: %d\n", n));
|
|
return n;
|
|
}
|
|
|
|
static int fmr2_product_info(struct fmr2_device *dev)
|
|
{
|
|
int n = inb(dev->port);
|
|
n &= 0xC1;
|
|
if (n == 0)
|
|
{
|
|
/* this should support volume set */
|
|
dev->card_type = 12;
|
|
return 0;
|
|
}
|
|
/* not volume (mine is 11) */
|
|
dev->card_type = (n==128)?11:0;
|
|
return n;
|
|
}
|
|
|
|
static inline int fmr2_getsigstr(struct fmr2_device *dev)
|
|
{
|
|
/* !!! work only if scanning freq */
|
|
int port = dev->port, res = 0xffff;
|
|
outb(5,port);
|
|
wait(4,port);
|
|
if (!(inb(port)&1)) res = 0;
|
|
debug_print((KERN_DEBUG "signal: %d\n", res));
|
|
return res;
|
|
}
|
|
|
|
/* set frequency and unmute card */
|
|
static int fmr2_setfreq(struct fmr2_device *dev)
|
|
{
|
|
int port = dev->port;
|
|
unsigned long freq = dev->curfreq;
|
|
|
|
fmr2_mute(port);
|
|
|
|
/* 0x42 for mono output
|
|
* 0x102 forward scanning
|
|
* 0x182 scansione avanti
|
|
*/
|
|
outbits(9,0x2,3,port);
|
|
outbits(16,RSF16_ENCODE(freq),2,port);
|
|
|
|
fmr2_unmute(port);
|
|
|
|
/* wait 0.11 sec */
|
|
msleep(110);
|
|
|
|
/* NOTE if mute this stop radio
|
|
you must set freq on unmute */
|
|
dev->stereo = fmr2_stereo_mode(port);
|
|
return 0;
|
|
}
|
|
|
|
/* !!! not tested, in my card this does't work !!! */
|
|
static int fmr2_setvolume(struct fmr2_device *dev)
|
|
{
|
|
int i,a,n, port = dev->port;
|
|
|
|
if (dev->card_type != 11) return 1;
|
|
|
|
switch( (dev->curvol+(1<<11)) >> 12 )
|
|
{
|
|
case 0: case 1: n = 0x21; break;
|
|
case 2: n = 0x84; break;
|
|
case 3: n = 0x90; break;
|
|
case 4: n = 0x104; break;
|
|
case 5: n = 0x110; break;
|
|
case 6: n = 0x204; break;
|
|
case 7: n = 0x210; break;
|
|
case 8: n = 0x402; break;
|
|
case 9: n = 0x404; break;
|
|
default:
|
|
case 10: n = 0x408; break;
|
|
case 11: n = 0x410; break;
|
|
case 12: n = 0x801; break;
|
|
case 13: n = 0x802; break;
|
|
case 14: n = 0x804; break;
|
|
case 15: n = 0x808; break;
|
|
case 16: n = 0x810; break;
|
|
}
|
|
for(i=12;--i>=0;)
|
|
{
|
|
a = ((n >> i) & 1) << 6; /* if (a=0) a= 0; else a= 0x40; */
|
|
outb(a|4, port);
|
|
wait(4,port);
|
|
outb(a|0x24, port);
|
|
wait(4,port);
|
|
outb(a|4, port);
|
|
wait(4,port);
|
|
}
|
|
for(i=6;--i>=0;)
|
|
{
|
|
a = ((0x18 >> i) & 1) << 6;
|
|
outb(a|4, port);
|
|
wait(4,port);
|
|
outb(a|0x24, port);
|
|
wait(4,port);
|
|
outb(a|4, port);
|
|
wait(4,port);
|
|
}
|
|
wait(4,port);
|
|
outb(0x14, port);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fmr2_do_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct video_device *dev = video_devdata(file);
|
|
struct fmr2_device *fmr2 = dev->priv;
|
|
debug_print((KERN_DEBUG "freq %ld flags %d vol %d mute %d "
|
|
"stereo %d type %d\n",
|
|
fmr2->curfreq, fmr2->flags, fmr2->curvol, fmr2->mute,
|
|
fmr2->stereo, fmr2->card_type));
|
|
|
|
switch(cmd)
|
|
{
|
|
case VIDIOCGCAP:
|
|
{
|
|
struct video_capability *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "SF16-FMR2 radio");
|
|
v->type=VID_TYPE_TUNER;
|
|
v->channels=1;
|
|
v->audios=1;
|
|
return 0;
|
|
}
|
|
case VIDIOCGTUNER:
|
|
{
|
|
struct video_tuner *v = arg;
|
|
int mult;
|
|
|
|
if(v->tuner) /* Only 1 tuner */
|
|
return -EINVAL;
|
|
strcpy(v->name, "FM");
|
|
mult = (fmr2->flags & VIDEO_TUNER_LOW) ? 1 : 1000;
|
|
v->rangelow = RSF16_MINFREQ/mult;
|
|
v->rangehigh = RSF16_MAXFREQ/mult;
|
|
v->flags = fmr2->flags | VIDEO_AUDIO_MUTABLE;
|
|
if (fmr2->mute)
|
|
v->flags |= VIDEO_AUDIO_MUTE;
|
|
v->mode=VIDEO_MODE_AUTO;
|
|
mutex_lock(&lock);
|
|
v->signal = fmr2_getsigstr(fmr2);
|
|
mutex_unlock(&lock);
|
|
return 0;
|
|
}
|
|
case VIDIOCSTUNER:
|
|
{
|
|
struct video_tuner *v = arg;
|
|
if (v->tuner!=0)
|
|
return -EINVAL;
|
|
fmr2->flags = v->flags & VIDEO_TUNER_LOW;
|
|
return 0;
|
|
}
|
|
case VIDIOCGFREQ:
|
|
{
|
|
unsigned long *freq = arg;
|
|
*freq = fmr2->curfreq;
|
|
if (!(fmr2->flags & VIDEO_TUNER_LOW))
|
|
*freq /= 1000;
|
|
return 0;
|
|
}
|
|
case VIDIOCSFREQ:
|
|
{
|
|
unsigned long *freq = arg;
|
|
if (!(fmr2->flags & VIDEO_TUNER_LOW))
|
|
*freq *= 1000;
|
|
if ( *freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ )
|
|
return -EINVAL;
|
|
/* rounding in steps of 200 to match th freq
|
|
* that will be used
|
|
*/
|
|
fmr2->curfreq = (*freq/200)*200;
|
|
|
|
/* set card freq (if not muted) */
|
|
if (fmr2->curvol && !fmr2->mute)
|
|
{
|
|
mutex_lock(&lock);
|
|
fmr2_setfreq(fmr2);
|
|
mutex_unlock(&lock);
|
|
}
|
|
return 0;
|
|
}
|
|
case VIDIOCGAUDIO:
|
|
{
|
|
struct video_audio *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
/* !!! do not return VIDEO_AUDIO_MUTE */
|
|
v->flags = VIDEO_AUDIO_MUTABLE;
|
|
strcpy(v->name, "Radio");
|
|
/* get current stereo mode */
|
|
v->mode = fmr2->stereo ? VIDEO_SOUND_STEREO: VIDEO_SOUND_MONO;
|
|
/* volume supported ? */
|
|
if (fmr2->card_type == 11)
|
|
{
|
|
v->flags |= VIDEO_AUDIO_VOLUME;
|
|
v->step = 1 << 12;
|
|
v->volume = fmr2->curvol;
|
|
}
|
|
debug_print((KERN_DEBUG "Get flags %d vol %d\n", v->flags, v->volume));
|
|
return 0;
|
|
}
|
|
case VIDIOCSAUDIO:
|
|
{
|
|
struct video_audio *v = arg;
|
|
if(v->audio)
|
|
return -EINVAL;
|
|
debug_print((KERN_DEBUG "Set flags %d vol %d\n", v->flags, v->volume));
|
|
/* set volume */
|
|
if (v->flags & VIDEO_AUDIO_VOLUME)
|
|
fmr2->curvol = v->volume; /* !!! set with precision */
|
|
if (fmr2->card_type != 11) fmr2->curvol = 65535;
|
|
fmr2->mute = 0;
|
|
if (v->flags & VIDEO_AUDIO_MUTE)
|
|
fmr2->mute = 1;
|
|
#ifdef DEBUG
|
|
if (fmr2->curvol && !fmr2->mute)
|
|
printk(KERN_DEBUG "unmute\n");
|
|
else
|
|
printk(KERN_DEBUG "mute\n");
|
|
#endif
|
|
mutex_lock(&lock);
|
|
if (fmr2->curvol && !fmr2->mute)
|
|
{
|
|
fmr2_setvolume(fmr2);
|
|
fmr2_setfreq(fmr2);
|
|
}
|
|
else fmr2_mute(fmr2->port);
|
|
mutex_unlock(&lock);
|
|
return 0;
|
|
}
|
|
case VIDIOCGUNIT:
|
|
{
|
|
struct video_unit *v = arg;
|
|
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;
|
|
return 0;
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static int fmr2_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
return video_usercopy(inode, file, cmd, arg, fmr2_do_ioctl);
|
|
}
|
|
|
|
static struct fmr2_device fmr2_unit;
|
|
|
|
static struct file_operations fmr2_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = video_exclusive_open,
|
|
.release = video_exclusive_release,
|
|
.ioctl = fmr2_ioctl,
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static struct video_device fmr2_radio=
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.name = "SF16FMR2 radio",
|
|
. type = VID_TYPE_TUNER,
|
|
.hardware = VID_HARDWARE_SF16FMR2,
|
|
.fops = &fmr2_fops,
|
|
};
|
|
|
|
static int __init fmr2_init(void)
|
|
{
|
|
fmr2_unit.port = io;
|
|
fmr2_unit.curvol = 0;
|
|
fmr2_unit.mute = 0;
|
|
fmr2_unit.curfreq = 0;
|
|
fmr2_unit.stereo = 1;
|
|
fmr2_unit.flags = VIDEO_TUNER_LOW;
|
|
fmr2_unit.card_type = 0;
|
|
fmr2_radio.priv = &fmr2_unit;
|
|
|
|
mutex_init(&lock);
|
|
|
|
if (request_region(io, 2, "sf16fmr2"))
|
|
{
|
|
printk(KERN_ERR "fmr2: port 0x%x already in use\n", io);
|
|
return -EBUSY;
|
|
}
|
|
|
|
if(video_register_device(&fmr2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
|
|
{
|
|
release_region(io, 2);
|
|
return -EINVAL;
|
|
}
|
|
|
|
printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
|
|
debug_print((KERN_DEBUG "Mute %d Low %d\n",VIDEO_AUDIO_MUTE,VIDEO_TUNER_LOW));
|
|
/* mute card - prevents noisy bootups */
|
|
mutex_lock(&lock);
|
|
fmr2_mute(io);
|
|
fmr2_product_info(&fmr2_unit);
|
|
mutex_unlock(&lock);
|
|
debug_print((KERN_DEBUG "card_type %d\n", fmr2_unit.card_type));
|
|
return 0;
|
|
}
|
|
|
|
MODULE_AUTHOR("Ziglio Frediano, freddy77@angelfire.com");
|
|
MODULE_DESCRIPTION("A driver for the SF16FMR2 radio.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_param(io, int, 0);
|
|
MODULE_PARM_DESC(io, "I/O address of the SF16FMR2 card (should be 0x384, if do not work try 0x284)");
|
|
module_param(radio_nr, int, 0);
|
|
|
|
static void __exit fmr2_cleanup_module(void)
|
|
{
|
|
video_unregister_device(&fmr2_radio);
|
|
release_region(io,2);
|
|
}
|
|
|
|
module_init(fmr2_init);
|
|
module_exit(fmr2_cleanup_module);
|
|
|
|
#ifndef MODULE
|
|
|
|
static int __init fmr2_setup_io(char *str)
|
|
{
|
|
get_option(&str, &io);
|
|
return 1;
|
|
}
|
|
|
|
__setup("sf16fmr2=", fmr2_setup_io);
|
|
|
|
#endif
|