WSL2-Linux-Kernel/drivers/media/radio/radio-gemtek-pci.c

474 строки
11 KiB
C

/*
***************************************************************************
*
* radio-gemtek-pci.c - Gemtek PCI Radio driver
* (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru>
*
***************************************************************************
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
***************************************************************************
*
* Gemtek Corp still silently refuses to release any specifications
* of their multimedia devices, so the protocol still has to be
* reverse engineered.
*
* The v4l code was inspired by Jonas Munsin's Gemtek serial line
* radio device driver.
*
* Please, let me know if this piece of code was useful :)
*
* TODO: multiple device support and portability were not tested
*
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
*
***************************************************************************
*/
#include <linux/types.h>
#include <linux/list.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/videodev2.h>
#include <linux/errno.h>
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#include <linux/io.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ioctl.h>
MODULE_AUTHOR("Vladimir Shebordaev <vshebordaev@mail.ru>");
MODULE_DESCRIPTION("The video4linux driver for the Gemtek PCI Radio Card");
MODULE_LICENSE("GPL");
static int nr_radio = -1;
static int mx = 1;
module_param(mx, bool, 0);
MODULE_PARM_DESC(mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not");
module_param(nr_radio, int, 0);
MODULE_PARM_DESC(nr_radio, "video4linux device number to use");
#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
#ifndef PCI_VENDOR_ID_GEMTEK
#define PCI_VENDOR_ID_GEMTEK 0x5046
#endif
#ifndef PCI_DEVICE_ID_GEMTEK_PR103
#define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
#endif
#ifndef GEMTEK_PCI_RANGE_LOW
#define GEMTEK_PCI_RANGE_LOW (87*16000)
#endif
#ifndef GEMTEK_PCI_RANGE_HIGH
#define GEMTEK_PCI_RANGE_HIGH (108*16000)
#endif
struct gemtek_pci {
struct v4l2_device v4l2_dev;
struct video_device vdev;
struct mutex lock;
struct pci_dev *pdev;
u32 iobase;
u32 length;
u32 current_frequency;
u8 mute;
};
static inline struct gemtek_pci *to_gemtek_pci(struct v4l2_device *v4l2_dev)
{
return container_of(v4l2_dev, struct gemtek_pci, v4l2_dev);
}
static inline u8 gemtek_pci_out(u16 value, u32 port)
{
outw(value, port);
return (u8)value;
}
#define _b0(v) (*((u8 *)&v))
static void __gemtek_pci_cmd(u16 value, u32 port, u8 *last_byte, int keep)
{
u8 byte = *last_byte;
if (!value) {
if (!keep)
value = (u16)port;
byte &= 0xfd;
} else
byte |= 2;
_b0(value) = byte;
outw(value, port);
byte |= 1;
_b0(value) = byte;
outw(value, port);
byte &= 0xfe;
_b0(value) = byte;
outw(value, port);
*last_byte = byte;
}
static inline void gemtek_pci_nil(u32 port, u8 *last_byte)
{
__gemtek_pci_cmd(0x00, port, last_byte, false);
}
static inline void gemtek_pci_cmd(u16 cmd, u32 port, u8 *last_byte)
{
__gemtek_pci_cmd(cmd, port, last_byte, true);
}
static void gemtek_pci_setfrequency(struct gemtek_pci *card, unsigned long frequency)
{
int i;
u32 value = frequency / 200 + 856;
u16 mask = 0x8000;
u8 last_byte;
u32 port = card->iobase;
mutex_lock(&card->lock);
card->current_frequency = frequency;
last_byte = gemtek_pci_out(0x06, port);
i = 0;
do {
gemtek_pci_nil(port, &last_byte);
i++;
} while (i < 9);
i = 0;
do {
gemtek_pci_cmd(value & mask, port, &last_byte);
mask >>= 1;
i++;
} while (i < 16);
outw(0x10, port);
mutex_unlock(&card->lock);
}
static void gemtek_pci_mute(struct gemtek_pci *card)
{
mutex_lock(&card->lock);
outb(0x1f, card->iobase);
card->mute = true;
mutex_unlock(&card->lock);
}
static void gemtek_pci_unmute(struct gemtek_pci *card)
{
if (card->mute) {
gemtek_pci_setfrequency(card, card->current_frequency);
card->mute = false;
}
}
static int gemtek_pci_getsignal(struct gemtek_pci *card)
{
int sig;
mutex_lock(&card->lock);
sig = (inb(card->iobase) & 0x08) ? 0 : 1;
mutex_unlock(&card->lock);
return sig;
}
static int vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
struct gemtek_pci *card = video_drvdata(file);
strlcpy(v->driver, "radio-gemtek-pci", sizeof(v->driver));
strlcpy(v->card, "GemTek PCI Radio", sizeof(v->card));
snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(card->pdev));
v->version = RADIO_VERSION;
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 gemtek_pci *card = video_drvdata(file);
if (v->index > 0)
return -EINVAL;
strlcpy(v->name, "FM", sizeof(v->name));
v->type = V4L2_TUNER_RADIO;
v->rangelow = GEMTEK_PCI_RANGE_LOW;
v->rangehigh = GEMTEK_PCI_RANGE_HIGH;
v->rxsubchans = V4L2_TUNER_SUB_MONO;
v->capability = V4L2_TUNER_CAP_LOW;
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal = 0xffff * gemtek_pci_getsignal(card);
return 0;
}
static int vidioc_s_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
return v->index ? -EINVAL : 0;
}
static int vidioc_s_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct gemtek_pci *card = video_drvdata(file);
if (f->frequency < GEMTEK_PCI_RANGE_LOW ||
f->frequency > GEMTEK_PCI_RANGE_HIGH)
return -EINVAL;
gemtek_pci_setfrequency(card, f->frequency);
card->mute = false;
return 0;
}
static int vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct gemtek_pci *card = video_drvdata(file);
f->type = V4L2_TUNER_RADIO;
f->frequency = card->current_frequency;
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);
case V4L2_CID_AUDIO_VOLUME:
return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
}
return -EINVAL;
}
static int vidioc_g_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct gemtek_pci *card = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value = card->mute;
return 0;
case V4L2_CID_AUDIO_VOLUME:
if (card->mute)
ctrl->value = 0;
else
ctrl->value = 65535;
return 0;
}
return -EINVAL;
}
static int vidioc_s_ctrl(struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct gemtek_pci *card = video_drvdata(file);
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value)
gemtek_pci_mute(card);
else
gemtek_pci_unmute(card);
return 0;
case V4L2_CID_AUDIO_VOLUME:
if (ctrl->value)
gemtek_pci_unmute(card);
else
gemtek_pci_mute(card);
return 0;
}
return -EINVAL;
}
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;
}
enum {
GEMTEK_PR103
};
static char *card_names[] __devinitdata = {
"GEMTEK_PR103"
};
static struct pci_device_id gemtek_pci_id[] =
{
{ PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
{ 0 }
};
MODULE_DEVICE_TABLE(pci, gemtek_pci_id);
static const struct v4l2_file_operations gemtek_pci_fops = {
.owner = THIS_MODULE,
.ioctl = video_ioctl2,
};
static const struct v4l2_ioctl_ops gemtek_pci_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 gemtek_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
{
struct gemtek_pci *card;
struct v4l2_device *v4l2_dev;
int res;
card = kzalloc(sizeof(struct gemtek_pci), GFP_KERNEL);
if (card == NULL) {
dev_err(&pdev->dev, "out of memory\n");
return -ENOMEM;
}
v4l2_dev = &card->v4l2_dev;
mutex_init(&card->lock);
card->pdev = pdev;
strlcpy(v4l2_dev->name, "gemtek_pci", sizeof(v4l2_dev->name));
res = v4l2_device_register(&pdev->dev, v4l2_dev);
if (res < 0) {
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
kfree(card);
return res;
}
if (pci_enable_device(pdev))
goto err_pci;
card->iobase = pci_resource_start(pdev, 0);
card->length = pci_resource_len(pdev, 0);
if (request_region(card->iobase, card->length, card_names[pci_id->driver_data]) == NULL) {
v4l2_err(v4l2_dev, "i/o port already in use\n");
goto err_pci;
}
strlcpy(card->vdev.name, v4l2_dev->name, sizeof(card->vdev.name));
card->vdev.v4l2_dev = v4l2_dev;
card->vdev.fops = &gemtek_pci_fops;
card->vdev.ioctl_ops = &gemtek_pci_ioctl_ops;
card->vdev.release = video_device_release_empty;
video_set_drvdata(&card->vdev, card);
if (video_register_device(&card->vdev, VFL_TYPE_RADIO, nr_radio) < 0)
goto err_video;
gemtek_pci_mute(card);
v4l2_info(v4l2_dev, "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n",
pdev->revision, card->iobase, card->iobase + card->length - 1);
return 0;
err_video:
release_region(card->iobase, card->length);
err_pci:
v4l2_device_unregister(v4l2_dev);
kfree(card);
return -ENODEV;
}
static void __devexit gemtek_pci_remove(struct pci_dev *pdev)
{
struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
struct gemtek_pci *card = to_gemtek_pci(v4l2_dev);
video_unregister_device(&card->vdev);
v4l2_device_unregister(v4l2_dev);
release_region(card->iobase, card->length);
if (mx)
gemtek_pci_mute(card);
kfree(card);
}
static struct pci_driver gemtek_pci_driver = {
.name = "gemtek_pci",
.id_table = gemtek_pci_id,
.probe = gemtek_pci_probe,
.remove = __devexit_p(gemtek_pci_remove),
};
static int __init gemtek_pci_init(void)
{
return pci_register_driver(&gemtek_pci_driver);
}
static void __exit gemtek_pci_exit(void)
{
pci_unregister_driver(&gemtek_pci_driver);
}
module_init(gemtek_pci_init);
module_exit(gemtek_pci_exit);