/* 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)
*
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
*/
#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/videodev2.h> /* kernel radio structs */
#include <media/v4l2-common.h>
#include <linux/mutex.h>
static struct mutex lock;
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
static struct v4l2_queryctrl radio_qctrl[] = {
{
.id = V4L2_CID_AUDIO_MUTE,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.default_value = 1,
.type = V4L2_CTRL_TYPE_BOOLEAN,
},{
.id = V4L2_CID_AUDIO_VOLUME,
.name = "Volume",
.minimum = 0,
.maximum = 65535,
.step = 1<<12,
.default_value = 0xff,
.type = V4L2_CTRL_TYPE_INTEGER,
}
};
#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 vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-sf16fmr2", sizeof(v->driver));
strlcpy(v->card, "SF16-FMR2 radio", sizeof(v->card));
sprintf(v->bus_info, "ISA");
v->version = RADIO_VERSION;
v->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
int mult;
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
if (v->index > 0)
return -EINVAL;
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
mult = (fmr2->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
v->rangelow = RSF16_MINFREQ/mult;
v->rangehigh = RSF16_MAXFREQ/mult;
v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
v->capability = fmr2->flags&V4L2_TUNER_CAP_LOW;
v->audmode = fmr2->stereo ? V4L2_TUNER_MODE_STEREO:
V4L2_TUNER_MODE_MONO;
mutex_lock(&lock);
v->signal = fmr2_getsigstr(fmr2);
mutex_unlock(&lock);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
if (v->index > 0)
return -EINVAL;
return 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
f->frequency *= 1000;
if (f->frequency < RSF16_MINFREQ ||
f->frequency > RSF16_MAXFREQ )
return -EINVAL;
/*rounding in steps of 200 to match th freq
that will be used */
fmr2->curfreq = (f->frequency/200)*200;
/* set card freq (if not muted) */
if (fmr2->curvol && !fmr2->mute) {
mutex_lock(&lock);
fmr2_setfreq(fmr2);
mutex_unlock(&lock);
}
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
f->type = V4L2_TUNER_RADIO;
f->frequency = fmr2->curfreq;
if (!(fmr2->flags & V4L2_TUNER_CAP_LOW))
f->frequency /= 1000;
return 0;
}
static int vidioc_queryctrl(struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
if ((fmr2->card_type != 11)
&& V4L2_CID_AUDIO_VOLUME)
radio_qctrl[i].step = 65535;
if (qc->id && qc->id == radio_qctrl[i].id) {
memcpy(qc, &(radio_qctrl[i]),
sizeof(*qc));
return 0;
}
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = fmr2->mute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
ctrl->value = fmr2->curvol;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct fmr2_device *fmr2 = dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
fmr2->mute = ctrl->value;
if (fmr2->card_type != 11) {
if (!fmr2->mute)
fmr2->curvol = 65535;
else
fmr2->curvol = 0;
}
break;
case V4L2_CID_AUDIO_VOLUME:
fmr2->curvol = ctrl->value;
if (fmr2->card_type != 11) {
if (fmr2->curvol) {
fmr2->curvol = 65535;
fmr2->mute = 0;
} else {
fmr2->curvol = 0;
fmr2->mute = 1;
}
}
break;
default:
return -EINVAL;
}
#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;
}
static int vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
strcpy(a->name, "Radio");
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index != 0)
return -EINVAL;
return 0;
}
static struct fmr2_device fmr2_unit;
static const struct file_operations fmr2_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = video_ioctl2,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device fmr2_radio=
{
.owner = THIS_MODULE,
.name = "SF16FMR2 radio",
. type = VID_TYPE_TUNER,
.fops = &fmr2_fops,
.vidioc_querycap = vidioc_querycap,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
};
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 = V4L2_TUNER_CAP_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) < 0) {
release_region(io, 2);
return -EINVAL;
}
printk(KERN_INFO "SF16FMR2 radio card driver at 0x%x.\n", io);
/* 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
