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linux-sg2042/drivers/media/radio/radio-maxiradio.c

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/*
* 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 Sun Feb 4 22:51:27 EET 2001
* - tiding up
* - removed support for multiple devices as it didn't work anyway
*
* BUGS:
* - card unmutes if you change frequency
*
* (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
* - Conversion to V4L2 API
* - Uses video_ioctl2 for parsing and to add debug support
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/delay.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/mutex.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#define DRIVER_VERSION "0.77"
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,7,7)
static struct video_device maxiradio_radio;
#define dprintk(num, fmt, arg...) \
do { \
if (maxiradio_radio.debug >= num) \
printk(KERN_DEBUG "%s: " fmt, \
maxiradio_radio.name, ## arg); } while (0)
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,
}
};
#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 */
/* (x==fmhz*16*1000) -> bits */
#define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1)) \
/(FREQ_STEP<<2))<<2)
#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
static const struct file_operations maxiradio_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 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 mutex lock;
} radio_unit = {
.muted =1,
.freq = FREQ_LO,
};
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) {
dprintk(1, "Radio powered on\n");
outb(power, io);
} else {
dprintk(1, "Radio powered off\n");
outb(0,io);
}
}
static void set_freq(__u16 io, __u32 freq)
{
unsigned long int si;
int bl;
int data = FREQ2BITS(freq);
/* 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;
}
dprintk(1, "Radio freq set to %d.%02d MHz\n",
freq / 16000,
freq % 16000 * 100 / 16000);
turn_power(io, 1);
}
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);
}
static int vidioc_querycap (struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
strlcpy(v->card, "Maxi Radio FM2000 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)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card=dev->priv;
if (v->index > 0)
return -EINVAL;
memset(v,0,sizeof(*v));
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
v->rangelow=FREQ_LO;
v->rangehigh=FREQ_HI;
v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
v->capability=V4L2_TUNER_CAP_LOW;
if(get_stereo(card->io))
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal=0xffff*get_tune(card->io);
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_g_audio (struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
strcpy(a->name, "FM");
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 int vidioc_s_frequency (struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card=dev->priv;
if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
dprintk(1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
f->frequency / 16000,
f->frequency % 16000 * 100 / 16000,
FREQ_LO / 16000, FREQ_HI / 16000);
return -EINVAL;
}
card->freq = f->frequency;
set_freq(card->io, card->freq);
msleep(125);
return 0;
}
static int vidioc_g_frequency (struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct radio_device *card=dev->priv;
f->type = V4L2_TUNER_RADIO;
f->frequency = card->freq;
dprintk(4, "radio freq is %d.%02d MHz",
f->frequency / 16000,
f->frequency % 16000 * 100 / 16000);
return 0;
}
static int vidioc_queryctrl (struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
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 radio_device *card=dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value=card->muted;
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 radio_device *card=dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
card->muted = ctrl->value;
if(card->muted)
turn_power(card->io, 0);
else
set_freq(card->io, card->freq);
return 0;
}
return -EINVAL;
}
static struct video_device maxiradio_radio =
{
.owner = THIS_MODULE,
.name = "Maxi Radio FM2000 radio",
.type = VID_TYPE_TUNER,
.fops = &maxiradio_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 __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);
mutex_init(&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_register_driver(&maxiradio_driver);
}
static void __exit maxiradio_radio_exit(void)
{
pci_unregister_driver(&maxiradio_driver);
}
module_init(maxiradio_radio_init);
module_exit(maxiradio_radio_exit);
MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
MODULE_LICENSE("GPL");
module_param_named(debug,maxiradio_radio.debug, int, 0644);
MODULE_PARM_DESC(debug,"activates debug info");
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