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authorOndrej Zary <linux@rainbow-software.org>2009-12-10 17:12:32 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2009-12-16 00:18:40 -0200
commit67cabf503cd0ad7473cf1856f9c9bb6320098be6 (patch)
tree5b1205db2d1dc6327c3953cdea16cdc5efd30b4d /drivers
parent4b8303747474033d6d73828607eafab77c620d96 (diff)
V4L/DVB (13609): radio-sf16fmi: add autoprobing
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/radio/Kconfig5
-rw-r--r--drivers/media/radio/radio-sf16fmi.c60
2 files changed, 46 insertions, 19 deletions
diff --git a/drivers/media/radio/Kconfig b/drivers/media/radio/Kconfig
index 0fe93f2b48b..3f40f375981 100644
--- a/drivers/media/radio/Kconfig
+++ b/drivers/media/radio/Kconfig
@@ -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
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c
index e9ecfe11cda..985359d18aa 100644
--- a/drivers/media/radio/radio-sf16fmi.c
+++ b/drivers/media/radio/radio-sf16fmi.c
@@ -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);
}