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>
diff --git a/drivers/media/radio/radio-sf16fmi.c b/drivers/media/radio/radio-sf16fmi.c
index e9ecfe1..985359d 100644
--- a/drivers/media/radio/radio-sf16fmi.c
+++ b/drivers/media/radio/radio-sf16fmi.c
@@ -54,6 +54,7 @@
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 @@
{
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)
- io = isapnp_fmi_probe();
+ 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;
+ }
+
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 @@
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 @@
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);
}