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V4L/DVB (13609): radio-sf16fmi: add autoprobing

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Add automatic probing of ports 0x284 and 0x384 to radio-sf16fmi if no card is
found using PnP.

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Douglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Ondrej Zary 2009-12-10 17:12:32 -03:00 committed by Mauro Carvalho Chehab
parent 4b83037474
commit 67cabf503c
2 changed files with 46 additions and 19 deletions
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5
drivers/media/radio/Kconfig
View File

@ -218,10 +218,7 @@ config RADIO_SF16FMI
tristate "SF16-FMI/SF16-FMP Radio"
depends on ISA && VIDEO_V4L2
---help---
Choose Y here if you have one of these FM radio cards. If you
compile the driver into the kernel and your card is not PnP one, you
have to add "sf16fm=<io>" to the kernel command line (I/O address is
0x284 or 0x384).
Choose Y here if you have one of these FM radio cards.
In order to control your radio card, you will need to use programs
that are compatible with the Video For Linux API. Information on

60
drivers/media/radio/radio-sf16fmi.c
View File

@ -54,6 +54,7 @@ struct fmi
static struct fmi fmi_card;
static struct pnp_dev *dev;
bool pnp_attached;
/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
/* It is only useful to give freq in interval of 800 (=0.05Mhz),
@ -320,26 +321,54 @@ static int __init fmi_init(void)
{
struct fmi *fmi = &fmi_card;
struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
int res;
int res, i;
int probe_ports[] = { 0, 0x284, 0x384 };
if (io < 0) {
for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
io = probe_ports[i];
if (io == 0) {
io = isapnp_fmi_probe();
if (io < 0)
continue;
pnp_attached = 1;
}
if (!request_region(io, 2, "radio-sf16fmi")) {
if (pnp_attached)
pnp_device_detach(dev);
io = -1;
continue;
}
if (pnp_attached ||
((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
break;
release_region(io, 2);
io = -1;
}
} else {
if (!request_region(io, 2, "radio-sf16fmi")) {
printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
return -EBUSY;
}
if (inb(io) == 0xff) {
printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
release_region(io, 2);
return -ENODEV;
}
}
if (io < 0) {
printk(KERN_ERR "radio-sf16fmi: no cards found\n");
return -ENODEV;
}
if (io < 0)
io = isapnp_fmi_probe();
strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
fmi->io = io;
if (fmi->io < 0) {
v4l2_err(v4l2_dev, "No PnP card found.\n");
return fmi->io;
}
if (!request_region(io, 2, "radio-sf16fmi")) {
v4l2_err(v4l2_dev, "port 0x%x already in use\n", fmi->io);
pnp_device_detach(dev);
return -EBUSY;
}
res = v4l2_device_register(NULL, v4l2_dev);
if (res < 0) {
release_region(fmi->io, 2);
pnp_device_detach(dev);
if (pnp_attached)
pnp_device_detach(dev);
v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
return res;
}
@ -356,7 +385,8 @@ static int __init fmi_init(void)
if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
v4l2_device_unregister(v4l2_dev);
release_region(fmi->io, 2);
pnp_device_detach(dev);
if (pnp_attached)
pnp_device_detach(dev);
return -EINVAL;
}
@ -373,7 +403,7 @@ static void __exit fmi_exit(void)
video_unregister_device(&fmi->vdev);
v4l2_device_unregister(&fmi->v4l2_dev);
release_region(fmi->io, 2);
if (dev)
if (dev && pnp_attached)
pnp_device_detach(dev);
}