- 根目录:
- drivers
- media
- radio
- radio-maxiradio.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.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf
*
*
* 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 <linux/mutex.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
#define DRIVER_VERSION "0.7.8"
MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRIVER_VERSION);
static int radio_nr = -1;
module_param(radio_nr, int, 0);
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "activates debug info");
#define dprintk(dev, num, fmt, arg...) \
v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)
#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;
#define FREQ_LO (87 * 16000)
#define FREQ_HI (108 * 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)
struct maxiradio
{
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct pci_dev *pdev;
u16 io; /* base of radio io */
u16 muted; /* VIDEO_AUDIO_MUTE */
u16 stereo; /* VIDEO_TUNER_STEREO_ON */
u16 tuned; /* signal strength (0 or 0xffff) */
unsigned long freq;
struct mutex lock;
};
static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
}
static void outbit(unsigned long bit, u16 io)
{
int val = power | wren | (bit ? data : 0);
outb(val, io);
udelay(4);
outb(val | clk, io);
udelay(4);
outb(val, io);
udelay(4);
}
static void turn_power(struct maxiradio *dev, int p)
{
if (p != 0) {
dprintk(dev, 1, "Radio powered on\n");
outb(power, dev->io);
} else {
dprintk(dev, 1, "Radio powered off\n");
outb(0, dev->io);
}
}
static void set_freq(struct maxiradio *dev, u32 freq)
{
unsigned long int si;
int bl;
int io = dev->io;
int val = 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(val & si, io);
si >>= 1;
}
dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
freq / 16000,
freq % 16000 * 100 / 16000);
turn_power(dev, 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)
{
struct maxiradio *dev = video_drvdata(file);
strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
return 0;
}
static int vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct maxiradio *dev = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
mutex_lock(&dev->lock);
strlcpy(v->name, "FM", sizeof(v->name));
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(dev->io))
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = 0xffff * get_tune(dev->io);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
return v->index ? -EINVAL : 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)
{
return i ? -EINVAL : 0;
}
static int vidioc_g_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
a->index = 0;
strlcpy(a->name, "Radio", sizeof(a->name));
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_s_audio(struct file *file, void *priv,
struct v4l2_audio *a)
{
return a->index ? -EINVAL : 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct maxiradio *dev = video_drvdata(file);
if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
return -EINVAL;
if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
dprintk(dev, 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;
}
mutex_lock(&dev->lock);
dev->freq = f->frequency;
set_freq(dev, dev->freq);
msleep(125);
mutex_unlock(&dev->lock);
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct maxiradio *dev = video_drvdata(file);
if (f->tuner != 0)
return -EINVAL;
f->type = V4L2_TUNER_RADIO;
f->frequency = dev->freq;
dprintk(dev, 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)
{
switch (qc->id) {
case V4L2_CID_AUDIO_MUTE:
return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct maxiradio *dev = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = dev->muted;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct maxiradio *dev = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
mutex_lock(&dev->lock);
dev->muted = ctrl->value;
if (dev->muted)
turn_power(dev, 0);
else
set_freq(dev, dev->freq);
mutex_unlock(&dev->lock);
return 0;
}
return -EINVAL;
}
static const struct v4l2_file_operations maxiradio_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = {
.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)
{
struct maxiradio *dev;
struct v4l2_device *v4l2_dev;
int retval = -ENOMEM;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
dev_err(&pdev->dev, "not enough memory\n");
return -ENOMEM;
}
v4l2_dev = &dev->v4l2_dev;
mutex_init(&dev->lock);
dev->pdev = pdev;
dev->muted = 1;
dev->freq = FREQ_LO;
strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));
retval = v4l2_device_register(&pdev->dev, v4l2_dev);
if (retval < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
goto errfr;
}
if (!request_region(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
goto err_out;
}
if (pci_enable_device(pdev))
goto err_out_free_region;
dev->io = pci_resource_start(pdev, 0);
strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
dev->vdev.v4l2_dev = v4l2_dev;
dev->vdev.fops = &maxiradio_fops;
dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
dev->vdev.release = video_device_release_empty;
video_set_drvdata(&dev->vdev, dev);
if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
v4l2_err(v4l2_dev, "can't register device!");
goto err_out_free_region;
}
v4l2_info(v4l2_dev, "version " DRIVER_VERSION "\n");
v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
dev->io);
return 0;
err_out_free_region:
release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
err_out:
v4l2_device_unregister(v4l2_dev);
errfr:
kfree(dev);
return -ENODEV;
}
static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
struct maxiradio *dev = to_maxiradio(v4l2_dev);
video_unregister_device(&dev->vdev);
v4l2_device_unregister(&dev->v4l2_dev);
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);