[media] tea575x-tuner: update to latest V4L2 framework requirements

The tea575x-tuner module has been updated to use the latest V4L2 framework
functionality. This also required changes in the drivers that rely on it.

The tea575x changes are:

- The drivers must provide a v4l2_device struct to the tea module.
- The radio_nr module parameter must be part of the actual radio driver,
  and not of the tea module.
- Changed the frequency range to the normal 76-108 MHz range instead of
  50-150.
- Add hardware frequency seek support.
- Fix broken rxsubchans/audmode handling.
- The application can now select between stereo and mono.
- Support polling for control events.
- Add V4L2 priority handling.

And radio-sf16fmr2.c now uses the isa bus kernel framework.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Thanks-to: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 54 insertions, 7 deletions

diff --git a/drivers/media/radio/radio-sf16fmr2.c b/drivers/media/radio/radio-sf16fmr2.c
index 7ab9afadf29b..b18be64b2556 100644
--- a/drivers/media/radio/radio-sf16fmr2.c
+++ b/drivers/media/radio/radio-sf16fmr2.c
@@ -9,16 +9,23 @@
 #include <linux/delay.h>
 #include <linux/module.h>       /* Modules                      */
 #include <linux/init.h>         /* Initdata                     */
+#include <linux/slab.h>
 #include <linux/ioport.h>       /* request_region               */
 #include <linux/io.h>           /* outb, outb_p                 */
+#include <linux/isa.h>
 #include <sound/tea575x-tuner.h>
 
 MODULE_AUTHOR("Ondrej Zary");
 MODULE_DESCRIPTION("MediaForte SF16-FMR2 FM radio card driver");
 MODULE_LICENSE("GPL");
 
+static int radio_nr = -1;
+module_param(radio_nr, int, 0444);
+MODULE_PARM_DESC(radio_nr, "Radio device number");
+
 struct fmr2 {
         int io;
+        struct v4l2_device v4l2_dev;
         struct snd_tea575x tea;
         struct v4l2_ctrl *volume;
         struct v4l2_ctrl *balance;
@@ -26,7 +33,6 @@ struct fmr2 {
 
 /* the port is hardwired so no need to support multiple cards */
 #define FMR2_PORT       0x384
-static struct fmr2 fmr2_card;
 
 /* TEA575x tuner pins */
 #define STR_DATA        (1 << 0)
@@ -180,26 +186,46 @@ static int fmr2_tea_ext_init(struct snd_tea575x *tea)
         return 0;
 }
 
-static int __init fmr2_init(void)
+static int __init fmr2_probe(struct device *pdev, unsigned int dev)
 {
-        struct fmr2 *fmr2 = &fmr2_card;
+        struct fmr2 *fmr2;
+        int err;
+
+        fmr2 = kzalloc(sizeof(*fmr2), GFP_KERNEL);
+        if (fmr2 == NULL)
+                return -ENOMEM;
 
+        strlcpy(fmr2->v4l2_dev.name, dev_name(pdev),
+                        sizeof(fmr2->v4l2_dev.name));
         fmr2->io = FMR2_PORT;
 
-        if (!request_region(fmr2->io, 2, "SF16-FMR2")) {
+        if (!request_region(fmr2->io, 2, fmr2->v4l2_dev.name)) {
                 printk(KERN_ERR "radio-sf16fmr2: I/O port 0x%x already in use\n", fmr2->io);
+                kfree(fmr2);
                 return -EBUSY;
         }
 
+        dev_set_drvdata(pdev, fmr2);
+        err = v4l2_device_register(pdev, &fmr2->v4l2_dev);
+        if (err < 0) {
+                v4l2_err(&fmr2->v4l2_dev, "Could not register v4l2_device\n");
+                release_region(fmr2->io, 2);
+                kfree(fmr2);
+                return err;
+        }
+        fmr2->tea.v4l2_dev = &fmr2->v4l2_dev;
         fmr2->tea.private_data = fmr2;
+        fmr2->tea.radio_nr = radio_nr;
         fmr2->tea.ops = &fmr2_tea_ops;
         fmr2->tea.ext_init = fmr2_tea_ext_init;
         strlcpy(fmr2->tea.card, "SF16-FMR2", sizeof(fmr2->tea.card));
-        strcpy(fmr2->tea.bus_info, "ISA");
+        snprintf(fmr2->tea.bus_info, sizeof(fmr2->tea.bus_info), "ISA:%s",
+                        fmr2->v4l2_dev.name);
 
         if (snd_tea575x_init(&fmr2->tea)) {
                 printk(KERN_ERR "radio-sf16fmr2: Unable to detect TEA575x tuner\n");
                 release_region(fmr2->io, 2);
+                kfree(fmr2);
                 return -ENODEV;
         }
 
@@ -207,12 +233,33 @@ static int __init fmr2_init(void)
         return 0;
 }
 
-static void __exit fmr2_exit(void)
+static int __exit fmr2_remove(struct device *pdev, unsigned int dev)
 {
-        struct fmr2 *fmr2 = &fmr2_card;
+        struct fmr2 *fmr2 = dev_get_drvdata(pdev);
 
         snd_tea575x_exit(&fmr2->tea);
         release_region(fmr2->io, 2);
+        v4l2_device_unregister(&fmr2->v4l2_dev);
+        kfree(fmr2);
+        return 0;
+}
+
+struct isa_driver fmr2_driver = {
+        .probe          = fmr2_probe,
+        .remove         = fmr2_remove,
+        .driver         = {
+                .name   = "radio-sf16fmr2",
+        },
+};
+
+static int __init fmr2_init(void)
+{
+        return isa_register_driver(&fmr2_driver, 1);
+}
+
+static void __exit fmr2_exit(void)
+{
+        isa_unregister_driver(&fmr2_driver);
 }
 
 module_init(fmr2_init);