350 lines
8.1 KiB
C
350 lines
8.1 KiB
C
/*
|
|
* Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
|
|
* (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
|
|
*
|
|
* Based in the radio Maestro PCI driver. Actually it uses the same chip
|
|
* for radio but different pci controller.
|
|
*
|
|
* I didn't have any specs I reversed engineered the protocol from
|
|
* the windows driver (radio.dll).
|
|
*
|
|
* The card uses the TEA5757 chip that includes a search function but it
|
|
* is useless as I haven't found any way to read back the frequency. If
|
|
* anybody does please mail me.
|
|
*
|
|
* For the pdf file see:
|
|
* http://www.semiconductors.philips.com/pip/TEA5757H/V1
|
|
*
|
|
*
|
|
* CHANGES:
|
|
* 0.75b
|
|
* - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
|
|
*
|
|
* 0.75
|
|
* - tiding up
|
|
* - removed support for multiple devices as it didn't work anyway
|
|
*
|
|
* BUGS:
|
|
* - card unmutes if you change frequency
|
|
*
|
|
*/
|
|
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/io.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/semaphore.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/videodev.h>
|
|
|
|
/* version 0.75 Sun Feb 4 22:51:27 EET 2001 */
|
|
#define DRIVER_VERSION "0.75"
|
|
|
|
#ifndef PCI_VENDOR_ID_GUILLEMOT
|
|
#define PCI_VENDOR_ID_GUILLEMOT 0x5046
|
|
#endif
|
|
|
|
#ifndef PCI_DEVICE_ID_GUILLEMOT
|
|
#define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
|
|
#endif
|
|
|
|
|
|
/* TEA5757 pin mappings */
|
|
static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
|
|
|
|
static int radio_nr = -1;
|
|
module_param(radio_nr, int, 0);
|
|
|
|
|
|
#define FREQ_LO 50*16000
|
|
#define FREQ_HI 150*16000
|
|
|
|
#define FREQ_IF 171200 /* 10.7*16000 */
|
|
#define FREQ_STEP 200 /* 12.5*16 */
|
|
|
|
#define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
|
|
/(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
|
|
|
|
#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
|
|
|
|
|
|
static int radio_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg);
|
|
|
|
static struct file_operations maxiradio_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = video_exclusive_open,
|
|
.release = video_exclusive_release,
|
|
.ioctl = radio_ioctl,
|
|
.llseek = no_llseek,
|
|
};
|
|
static struct video_device maxiradio_radio =
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.name = "Maxi Radio FM2000 radio",
|
|
.type = VID_TYPE_TUNER,
|
|
.hardware = VID_HARDWARE_SF16MI,
|
|
.fops = &maxiradio_fops,
|
|
};
|
|
|
|
static struct radio_device
|
|
{
|
|
__u16 io, /* base of radio io */
|
|
muted, /* VIDEO_AUDIO_MUTE */
|
|
stereo, /* VIDEO_TUNER_STEREO_ON */
|
|
tuned; /* signal strength (0 or 0xffff) */
|
|
|
|
unsigned long freq;
|
|
|
|
struct semaphore lock;
|
|
} radio_unit = {0, 0, 0, 0, };
|
|
|
|
|
|
static void outbit(unsigned long bit, __u16 io)
|
|
{
|
|
if(bit != 0)
|
|
{
|
|
outb( power|wren|data ,io); udelay(4);
|
|
outb( power|wren|data|clk ,io); udelay(4);
|
|
outb( power|wren|data ,io); udelay(4);
|
|
}
|
|
else
|
|
{
|
|
outb( power|wren ,io); udelay(4);
|
|
outb( power|wren|clk ,io); udelay(4);
|
|
outb( power|wren ,io); udelay(4);
|
|
}
|
|
}
|
|
|
|
static void turn_power(__u16 io, int p)
|
|
{
|
|
if(p != 0) outb(power, io); else outb(0,io);
|
|
}
|
|
|
|
|
|
static void set_freq(__u16 io, __u32 data)
|
|
{
|
|
unsigned long int si;
|
|
int bl;
|
|
|
|
/* TEA5757 shift register bits (see pdf) */
|
|
|
|
outbit(0,io); // 24 search
|
|
outbit(1,io); // 23 search up/down
|
|
|
|
outbit(0,io); // 22 stereo/mono
|
|
|
|
outbit(0,io); // 21 band
|
|
outbit(0,io); // 20 band (only 00=FM works I think)
|
|
|
|
outbit(0,io); // 19 port ?
|
|
outbit(0,io); // 18 port ?
|
|
|
|
outbit(0,io); // 17 search level
|
|
outbit(0,io); // 16 search level
|
|
|
|
si = 0x8000;
|
|
for(bl = 1; bl <= 16 ; bl++) { outbit(data & si,io); si >>=1; }
|
|
|
|
outb(power,io);
|
|
}
|
|
|
|
static int get_stereo(__u16 io)
|
|
{
|
|
outb(power,io); udelay(4);
|
|
return !(inb(io) & mo_st);
|
|
}
|
|
|
|
static int get_tune(__u16 io)
|
|
{
|
|
outb(power+clk,io); udelay(4);
|
|
return !(inb(io) & mo_st);
|
|
}
|
|
|
|
|
|
inline static int radio_function(struct inode *inode, struct file *file,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct video_device *dev = video_devdata(file);
|
|
struct radio_device *card=dev->priv;
|
|
|
|
switch(cmd) {
|
|
case VIDIOCGCAP: {
|
|
struct video_capability *v = arg;
|
|
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "Maxi Radio FM2000 radio");
|
|
v->type=VID_TYPE_TUNER;
|
|
v->channels=v->audios=1;
|
|
return 0;
|
|
}
|
|
case VIDIOCGTUNER: {
|
|
struct video_tuner *v = arg;
|
|
|
|
if(v->tuner)
|
|
return -EINVAL;
|
|
|
|
card->stereo = 0xffff * get_stereo(card->io);
|
|
card->tuned = 0xffff * get_tune(card->io);
|
|
|
|
v->flags = VIDEO_TUNER_LOW | card->stereo;
|
|
v->signal = card->tuned;
|
|
|
|
strcpy(v->name, "FM");
|
|
|
|
v->rangelow = FREQ_LO;
|
|
v->rangehigh = FREQ_HI;
|
|
v->mode = VIDEO_MODE_AUTO;
|
|
|
|
return 0;
|
|
}
|
|
case VIDIOCSTUNER: {
|
|
struct video_tuner *v = arg;
|
|
if(v->tuner!=0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
case VIDIOCGFREQ: {
|
|
unsigned long *freq = arg;
|
|
|
|
*freq = card->freq;
|
|
return 0;
|
|
}
|
|
case VIDIOCSFREQ: {
|
|
unsigned long *freq = arg;
|
|
|
|
if (*freq < FREQ_LO || *freq > FREQ_HI)
|
|
return -EINVAL;
|
|
card->freq = *freq;
|
|
set_freq(card->io, FREQ2BITS(card->freq));
|
|
msleep(125);
|
|
return 0;
|
|
}
|
|
case VIDIOCGAUDIO: {
|
|
struct video_audio *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "Radio");
|
|
v->flags=VIDEO_AUDIO_MUTABLE | card->muted;
|
|
v->mode=VIDEO_SOUND_STEREO;
|
|
return 0;
|
|
}
|
|
|
|
case VIDIOCSAUDIO: {
|
|
struct video_audio *v = arg;
|
|
|
|
if(v->audio)
|
|
return -EINVAL;
|
|
card->muted = v->flags & VIDEO_AUDIO_MUTE;
|
|
if(card->muted)
|
|
turn_power(card->io, 0);
|
|
else
|
|
set_freq(card->io, FREQ2BITS(card->freq));
|
|
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;
|
|
v->teletext=VIDEO_NO_UNIT;
|
|
return 0;
|
|
}
|
|
default: return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static int radio_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct video_device *dev = video_devdata(file);
|
|
struct radio_device *card=dev->priv;
|
|
int ret;
|
|
|
|
down(&card->lock);
|
|
ret = video_usercopy(inode, file, cmd, arg, radio_function);
|
|
up(&card->lock);
|
|
return ret;
|
|
}
|
|
|
|
MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
|
|
MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
|
|
{
|
|
if(!request_region(pci_resource_start(pdev, 0),
|
|
pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
|
|
printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
|
|
goto err_out;
|
|
}
|
|
|
|
if (pci_enable_device(pdev))
|
|
goto err_out_free_region;
|
|
|
|
radio_unit.io = pci_resource_start(pdev, 0);
|
|
init_MUTEX(&radio_unit.lock);
|
|
maxiradio_radio.priv = &radio_unit;
|
|
|
|
if(video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
|
|
printk("radio-maxiradio: can't register device!");
|
|
goto err_out_free_region;
|
|
}
|
|
|
|
printk(KERN_INFO "radio-maxiradio: version "
|
|
DRIVER_VERSION
|
|
" time "
|
|
__TIME__ " "
|
|
__DATE__
|
|
"\n");
|
|
|
|
printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
|
|
radio_unit.io);
|
|
return 0;
|
|
|
|
err_out_free_region:
|
|
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
|
|
err_out:
|
|
return -ENODEV;
|
|
}
|
|
|
|
static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
|
|
{
|
|
video_unregister_device(&maxiradio_radio);
|
|
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
|
|
}
|
|
|
|
static struct pci_device_id maxiradio_pci_tbl[] = {
|
|
{ PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
|
|
PCI_ANY_ID, PCI_ANY_ID, },
|
|
{ 0,}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
|
|
|
|
static struct pci_driver maxiradio_driver = {
|
|
.name = "radio-maxiradio",
|
|
.id_table = maxiradio_pci_tbl,
|
|
.probe = maxiradio_init_one,
|
|
.remove = __devexit_p(maxiradio_remove_one),
|
|
};
|
|
|
|
static int __init maxiradio_radio_init(void)
|
|
{
|
|
return pci_module_init(&maxiradio_driver);
|
|
}
|
|
|
|
static void __exit maxiradio_radio_exit(void)
|
|
{
|
|
pci_unregister_driver(&maxiradio_driver);
|
|
}
|
|
|
|
module_init(maxiradio_radio_init);
|
|
module_exit(maxiradio_radio_exit);
|