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kernel-fxtec-pro1x/drivers/media/radio/radio-gemtek-pci.c
Alexey Klimov ff1a3ebb9c V4L/DVB (11391): pci-isa radios: remove open and release functions 
Patch removes empty open and release functions in pci and isa radio
drivers, setting them to NULL. V4L module doesn't call for them due to
previous patch.

Signed-off-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-04-06 21:44:30 -03:00

475 lines
11 KiB
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/*
***************************************************************************
*
* 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)
{
mutex_lock(&card->lock);
if (card->mute) {
gemtek_pci_setfrequency(card, card->current_frequency);
card->mute = false;
}
mutex_unlock(&card->lock);
}
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);
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