[PATCH] media-radio: Pci probing for maestro radio

- Pci probing functions added, some functions were rewrited.

- Use PCI_DEVICE macro.

- dev_* used for printing when pci_dev available.

- some static variables changed to dynamicto allow operation with multiple
  cards.

- Deleted macros for DEVICE_IDS, they are in pci_ids.h yet.
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

drivers/media/radio/radio-maestro.c

@@ -27,11 +27,7 @@
 #include <linux/pci.h>
 #include <linux/videodev.h>
 
-#define DRIVER_VERSION	"0.04"
-
-#define PCI_VENDOR_ESS                  0x125D
-#define PCI_DEVICE_ID_ESS_ESS1968       0x1968          /* Maestro 2    */
-#define PCI_DEVICE_ID_ESS_ESS1978       0x1978          /* Maestro 2E   */
+#define DRIVER_VERSION	"0.05"
 
 #define GPIO_DATA       0x60   /* port offset from ESS_IO_BASE */
 
@@ -66,6 +62,26 @@ module_param(radio_nr, int, 0);
 
 static int radio_ioctl(struct inode *inode, struct file *file,
 		       unsigned int cmd, unsigned long arg);
+static int maestro_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
+static void maestro_remove(struct pci_dev *pdev);
+
+static struct pci_device_id maestro_r_pci_tbl[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1968),
+		.class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
+		.class_mask = 0xffff00 },
+	{ PCI_DEVICE(PCI_VENDOR_ID_ESS, PCI_DEVICE_ID_ESS_ESS1978),
+		.class = PCI_CLASS_MULTIMEDIA_AUDIO << 8,
+		.class_mask = 0xffff00 },
+	{ 0 }
+};
+MODULE_DEVICE_TABLE(pci, maestro_r_pci_tbl);
+
+static struct pci_driver maestro_r_driver = {
+	.name		= "maestro_radio",
+	.id_table	= maestro_r_pci_tbl,
+	.probe		= maestro_probe,
+	.remove		= __devexit_p(maestro_remove),
+};
 
 static struct file_operations maestro_fops = {
 	.owner		= THIS_MODULE,
@@ -85,14 +101,14 @@ static struct video_device maestro_radio=
 	.fops           = &maestro_fops,
 };
 
-static struct radio_device
+struct radio_device
 {
 	__u16	io,	/* base of Maestro card radio io (GPIO_DATA)*/
 		muted,	/* VIDEO_AUDIO_MUTE */
 		stereo,	/* VIDEO_TUNER_STEREO_ON */	
 		tuned;	/* signal strength (0 or 0xffff) */
 	struct  semaphore lock;
-} radio_unit = {0, 0, 0, 0, };
+};
 
 static __u32 radio_bits_get(struct radio_device *dev)
 {
@@ -251,40 +267,7 @@ static int radio_ioctl(struct inode *inode, struct file *file,
 	return ret;
 }
 
-static __u16 radio_install(struct pci_dev *pcidev);
-
-MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
-MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
-MODULE_LICENSE("GPL");
-
-static void __exit maestro_radio_exit(void)
-{
-	video_unregister_device(&maestro_radio);
-}
-
-static int __init maestro_radio_init(void)
-{
-	register __u16 found=0;
-	struct pci_dev *pcidev = NULL;
-	while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS, 
-						  PCI_DEVICE_ID_ESS_ESS1968,
-						  pcidev)))
-		found |= radio_install(pcidev);
-	while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS,
-						  PCI_DEVICE_ID_ESS_ESS1978, 
-						  pcidev)))
-		found |= radio_install(pcidev);
-	if(!found) {
-		printk(KERN_INFO "radio-maestro: no devices found.\n");
-		return -ENODEV;
-	}
-	return 0;
-}
-
-module_init(maestro_radio_init);
-module_exit(maestro_radio_exit);
-
-static inline __u16 radio_power_on(struct radio_device *dev)
+static __u16 __devinit radio_power_on(struct radio_device *dev)
 {
 	register __u16 io=dev->io;
 	register __u32 ofreq;
@@ -305,29 +288,93 @@ static inline __u16 radio_power_on(struct radio_device *dev)
 	return (ofreq == radio_bits_get(dev));
 }
 
-static __u16 radio_install(struct pci_dev *pcidev)
+static int __devinit maestro_probe(struct pci_dev *pdev,
+	const struct pci_device_id *ent)
 {
-	if(((pcidev->class >> 8) & 0xffff) != PCI_CLASS_MULTIMEDIA_AUDIO)
-		return 0;
+	struct radio_device *radio_unit;
+	struct video_device *maestro_radio_inst;
+	int retval;
+
+	retval = pci_enable_device(pdev);
+	if (retval) {
+		dev_err(&pdev->dev, "enabling pci device failed!\n");
+		goto err;
+	}
 
-	radio_unit.io = pcidev->resource[0].start + GPIO_DATA;
-	maestro_radio.priv = &radio_unit;
-	init_MUTEX(&radio_unit.lock);
+	retval = -ENOMEM;
 
-	if(radio_power_on(&radio_unit)) {
-		if(video_register_device(&maestro_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
-			printk("radio-maestro: can't register device!");
-			return 0;
+	radio_unit = kzalloc(sizeof(*radio_unit), GFP_KERNEL);
+	if (radio_unit == NULL) {
+		dev_err(&pdev->dev, "not enough memory\n");
+		goto err;
+	}
+
+	radio_unit->io = pci_resource_start(pdev, 0) + GPIO_DATA;
+	init_MUTEX(&radio_unit->lock);
+
+	maestro_radio_inst = video_device_alloc();
+	if (maestro_radio_inst == NULL) {
+		dev_err(&pdev->dev, "not enough memory\n");
+		goto errfr;
 	}
-		printk(KERN_INFO "radio-maestro: version "
-		       DRIVER_VERSION 
-		       " time " 
-		       __TIME__ "  "
-		       __DATE__
-		       "\n");
-		printk(KERN_INFO "radio-maestro: radio chip initialized\n");
-		return 1;
-	} else
+
+	memcpy(maestro_radio_inst, &maestro_radio, sizeof(maestro_radio));
+	video_set_drvdata(maestro_radio_inst, radio_unit);
+	pci_set_drvdata(pdev, maestro_radio_inst);
+
+	retval = video_register_device(maestro_radio_inst, VFL_TYPE_RADIO,
+		radio_nr);
+	if (retval) {
+		printk(KERN_ERR "can't register video device!\n");
+		goto errfr1;
+	}
+
+	if (!radio_power_on(radio_unit)) {
+		retval = -EIO;
+		goto errunr;
+	}
+
+	dev_info(&pdev->dev, "version " DRIVER_VERSION " time " __TIME__ "  "
+		__DATE__ "\n");
+	dev_info(&pdev->dev, "radio chip initialized\n");
+
 	return 0;
+errunr:
+	video_unregister_device(maestro_radio_inst);
+errfr1:
+	kfree(maestro_radio_inst);
+errfr:
+	kfree(radio_unit);
+err:
+	return retval;
+
+}
+
+static void __devexit maestro_remove(struct pci_dev *pdev)
+{
+	struct video_device *vdev = pci_get_drvdata(pdev);
+
+	video_unregister_device(vdev);
+}
+
+MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
+MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
+MODULE_LICENSE("GPL");
+
+static int __init maestro_radio_init(void)
+{
+	int retval = pci_register_driver(&maestro_r_driver);
+
+	if (retval)
+		printk(KERN_ERR "error during registration pci driver\n");
+
+	return retval;
 }
 
+static void __exit maestro_radio_exit(void)
+{
+	pci_unregister_driver(&maestro_r_driver);
+}
+
+module_init(maestro_radio_init);
+module_exit(maestro_radio_exit);