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>
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@ -218,10 +218,7 @@ config RADIO_SF16FMI
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tristate "SF16-FMI/SF16-FMP Radio"
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depends on ISA && VIDEO_V4L2
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---help---
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Choose Y here if you have one of these FM radio cards. If you
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compile the driver into the kernel and your card is not PnP one, you
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have to add "sf16fm=<io>" to the kernel command line (I/O address is
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0x284 or 0x384).
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Choose Y here if you have one of these FM radio cards.
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In order to control your radio card, you will need to use programs
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that are compatible with the Video For Linux API. Information on
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@ -54,6 +54,7 @@ struct fmi
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static struct fmi fmi_card;
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static struct pnp_dev *dev;
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bool pnp_attached;
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/* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
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/* It is only useful to give freq in interval of 800 (=0.05Mhz),
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@ -320,26 +321,54 @@ static int __init fmi_init(void)
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{
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struct fmi *fmi = &fmi_card;
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struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
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int res;
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int res, i;
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int probe_ports[] = { 0, 0x284, 0x384 };
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if (io < 0) {
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for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
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io = probe_ports[i];
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if (io == 0) {
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io = isapnp_fmi_probe();
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if (io < 0)
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continue;
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pnp_attached = 1;
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}
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if (!request_region(io, 2, "radio-sf16fmi")) {
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if (pnp_attached)
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pnp_device_detach(dev);
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io = -1;
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continue;
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}
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if (pnp_attached ||
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((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
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break;
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release_region(io, 2);
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io = -1;
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}
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} else {
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if (!request_region(io, 2, "radio-sf16fmi")) {
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printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
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return -EBUSY;
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}
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if (inb(io) == 0xff) {
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printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
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release_region(io, 2);
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return -ENODEV;
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}
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}
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if (io < 0) {
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printk(KERN_ERR "radio-sf16fmi: no cards found\n");
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return -ENODEV;
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}
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if (io < 0)
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io = isapnp_fmi_probe();
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strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
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fmi->io = io;
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if (fmi->io < 0) {
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v4l2_err(v4l2_dev, "No PnP card found.\n");
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return fmi->io;
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}
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if (!request_region(io, 2, "radio-sf16fmi")) {
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v4l2_err(v4l2_dev, "port 0x%x already in use\n", fmi->io);
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pnp_device_detach(dev);
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return -EBUSY;
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}
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res = v4l2_device_register(NULL, v4l2_dev);
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if (res < 0) {
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release_region(fmi->io, 2);
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pnp_device_detach(dev);
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if (pnp_attached)
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pnp_device_detach(dev);
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v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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return res;
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}
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@ -356,7 +385,8 @@ static int __init fmi_init(void)
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if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
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v4l2_device_unregister(v4l2_dev);
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release_region(fmi->io, 2);
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pnp_device_detach(dev);
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if (pnp_attached)
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pnp_device_detach(dev);
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return -EINVAL;
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}
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@ -373,7 +403,7 @@ static void __exit fmi_exit(void)
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video_unregister_device(&fmi->vdev);
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v4l2_device_unregister(&fmi->v4l2_dev);
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release_region(fmi->io, 2);
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if (dev)
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if (dev && pnp_attached)
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pnp_device_detach(dev);
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}
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