Commit 67cabf50 authored by Ondrej Zary's avatar Ondrej Zary Committed by Mauro Carvalho Chehab
Browse files

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: default avatarOndrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 4b830374

drivers/media/radio/Kconfig

+1 −4
Original line number Diff line number Diff line
@@ -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

drivers/media/radio/radio-sf16fmi.c

+45 −15
Original line number Diff line number Diff line
@@ -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),
@@ -320,25 +321,53 @@ 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)

	if (io < 0) {

		for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {

			io = probe_ports[i];

			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 (io < 0)

					continue;

				pnp_attached = 1;

			}

			if (!request_region(io, 2, "radio-sf16fmi")) {

		v4l2_err(v4l2_dev, "port 0x%x already in use\n", fmi->io);

				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;



	res = v4l2_device_register(NULL, v4l2_dev);

	if (res < 0) {

		release_region(fmi->io, 2);

		if (pnp_attached)

			pnp_device_detach(dev);

		v4l2_err(v4l2_dev, "Could not register v4l2_device\n");

		return res;
@@ -356,6 +385,7 @@ 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);

		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);

}