patch-2.4.8 linux/drivers/media/radio/radio-gemtek-pci.c

• Lines: 452
• Date: Sun Aug 5 13:15:05 2001
• Orig file: v2.4.7/linux/drivers/media/radio/radio-gemtek-pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.7/linux/drivers/media/radio/radio-gemtek-pci.c linux/drivers/media/radio/radio-gemtek-pci.c
@@ -0,0 +1,451 @@
+/*
+ ***************************************************************************
+ *     
+ *     radio-gemtek-pci.c - Gemtek PCI Radio driver
+ *     (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru>
+ *
+ ***************************************************************************
+ *
+ *     This program is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of
+ *     the License, or (at your option) any later version.
+ *
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public
+ *     License along with this program; if not, write to the Free
+ *     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
+ *     USA.
+ *
+ ***************************************************************************
+ *
+ *     Gemtek Corp still silently refuses to release any specifications
+ *     of their multimedia devices, so the protocol still has to be
+ *     reverse engineered.
+ *
+ *     The v4l code was inspired by Jonas Munsin's  Gemtek serial line
+ *     radio device driver.
+ *
+ *     Please, let me know if this piece of code was useful :)
+ * 
+ *     TODO: multiple device support and portability were not tested
+ *
+ ***************************************************************************
+ */
+
+#include <linux/version.h>
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <linux/videodev.h>
+#include <linux/errno.h>
+
+#include <asm/io.h>
+#include <asm/uaccess.h>
+
+#ifndef PCI_VENDOR_ID_GEMTEK
+#define PCI_VENDOR_ID_GEMTEK 0x5046
+#endif
+
+#ifndef PCI_DEVICE_ID_GEMTEK_PR103
+#define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
+#endif
+
+#ifndef GEMTEK_PCI_RANGE_LOW
+#define GEMTEK_PCI_RANGE_LOW (87*16000)
+#endif
+
+#ifndef GEMTEK_PCI_RANGE_HIGH
+#define GEMTEK_PCI_RANGE_HIGH (108*16000)
+#endif
+
+#ifndef TRUE
+#define TRUE (1)
+#endif
+
+#ifndef FALSE 
+#define FALSE (0)
+#endif
+
+struct gemtek_pci_card {
+	struct video_device *videodev;
+	
+	u32 iobase;
+	u32 length;
+	u8  chiprev;
+	u16 model;
+	
+	u32 current_frequency;
+	u8  mute;
+};
+
+static const char rcsid[] = "$Id: radio-gemtek-pci.c,v 1.1 2001/07/23 08:08:16 ted Exp ted $";
+
+static int nr_radio = -1;
+
+static int gemtek_pci_open( struct video_device *dev, int flags)
+{
+	struct gemtek_pci_card *card =  dev->priv;
+
+/* Paranoid check */
+	if ( !card )
+		return -ENODEV;
+
+	return 0;
+}
+
+static void gemtek_pci_close( struct video_device *dev )
+{
+/*
+ *  The module usage is managed by 'videodev'
+ */
+}
+
+static inline u8 gemtek_pci_out( u16 value, u32 port )
+{
+	outw( value, port );
+
+	return (u8)value;
+}
+
+#define _b0( v ) *((u8 *)&v)  
+static void __gemtek_pci_cmd( u16 value, u32 port, u8 *last_byte, int keep )
+{
+	register u8 byte = *last_byte;
+
+	if ( !value ) {
+		if ( !keep )
+			value = (u16)port;
+		byte &= 0xfd;	
+	} else
+		byte |= 2;
+
+	_b0( value ) = byte;
+	outw( value, port );
+	byte |= 1;
+	_b0( value ) = byte;
+	outw( value, port );
+	byte &= 0xfe;
+	_b0( value ) = byte;
+	outw( value, port );
+	
+	*last_byte = byte;
+}
+
+static inline void gemtek_pci_nil( u32 port, u8 *last_byte )
+{
+	__gemtek_pci_cmd( 0x00, port, last_byte, FALSE );
+}
+
+static inline void gemtek_pci_cmd( u16 cmd, u32 port, u8 *last_byte )
+{
+	__gemtek_pci_cmd( cmd, port, last_byte, TRUE );
+}
+
+static void gemtek_pci_setfrequency( struct gemtek_pci_card *card, unsigned long frequency )
+{
+	register int i;
+	register u32 value = frequency / 200 + 856;
+	register u16 mask = 0x8000;
+	u8 last_byte;
+	u32 port = card->iobase;
+
+	last_byte = gemtek_pci_out( 0x06, port );
+
+	i = 0;
+	do {
+		gemtek_pci_nil( port, &last_byte );
+		i++;
+	} while ( i < 9 );
+
+	i = 0;
+	do {
+		gemtek_pci_cmd( value & mask, port, &last_byte );
+		mask >>= 1;
+		i++;
+	} while ( i < 16 );
+
+	outw( 0x10, port );
+}
+
+
+static inline void gemtek_pci_mute( struct gemtek_pci_card *card )
+{
+	outb( 0x1f, card->iobase );
+	card->mute = TRUE;
+}
+
+static inline void gemtek_pci_unmute( struct gemtek_pci_card *card )
+{
+	if ( card->mute ) {
+		gemtek_pci_setfrequency( card, card->current_frequency );
+		card->mute = FALSE;
+	}
+}
+
+static inline unsigned int gemtek_pci_getsignal( struct gemtek_pci_card *card )
+{
+	return ( inb( card->iobase ) & 0x08 ) ? 0 : 1;
+}
+
+static int gemtek_pci_ioctl( struct video_device *dev, unsigned int cmd, void *arg)
+{
+	struct gemtek_pci_card *card = dev->priv;
+
+	switch ( cmd ) {
+		case VIDIOCGCAP:
+		{
+			struct video_capability c;
+
+			c.type = VID_TYPE_TUNER;
+			c.channels = 1;
+			c.audios = 1;
+			c.maxwidth = 0;
+			c.maxheight = 0;
+			c.minwidth = 0;
+			c.minheight = 0;
+			strcpy( c.name, "Gemtek PCI Radio" );
+			if ( copy_to_user( arg, &c, sizeof( c ) ) )
+				return -EFAULT;
+
+			return 0;
+		} 
+
+		case VIDIOCGTUNER:
+		{
+			struct video_tuner t;
+
+			if ( copy_from_user( &t, arg, sizeof( struct video_tuner ) ) )
+				return -EFAULT;
+
+			if ( t.tuner ) 
+				return -EINVAL;
+
+			t.rangelow = GEMTEK_PCI_RANGE_LOW;
+			t.rangehigh = GEMTEK_PCI_RANGE_HIGH;
+			t.flags = VIDEO_TUNER_LOW;
+			t.mode = VIDEO_MODE_AUTO;
+			t.signal = 0xFFFF * gemtek_pci_getsignal( card );
+			strcpy( t.name, "FM" );
+
+			if ( copy_to_user( arg, &t, sizeof( struct video_tuner ) ) )
+				return -EFAULT;
+
+			return 0;
+		}
+
+		case VIDIOCSTUNER:
+		{
+			struct video_tuner t;
+
+			if ( copy_from_user( &t, arg, sizeof( struct video_tuner ) ) )
+				return -EFAULT;
+
+			if ( t.tuner )
+				return -EINVAL;
+
+			return 0;
+		}
+
+		case VIDIOCGFREQ:
+			return put_user( card->current_frequency, (u32 *)arg );
+
+		case VIDIOCSFREQ:
+		{
+			u32 frequency;
+	 
+			if ( get_user( frequency, (u32 *)arg ) )
+				return -EFAULT;
+
+			if ( (frequency < GEMTEK_PCI_RANGE_LOW) || (frequency > GEMTEK_PCI_RANGE_HIGH) )
+				return -EINVAL;
+
+			gemtek_pci_setfrequency( card, frequency );
+			card->current_frequency = frequency;
+			card->mute = FALSE;
+
+			return 0;
+		}
+  
+		case VIDIOCGAUDIO:
+		{	
+			struct video_audio a;
+
+			memset( &a, 0, sizeof( a ) );
+			a.flags |= VIDEO_AUDIO_MUTABLE;
+			a.volume = 1;
+			a.step = 65535;
+			strcpy( a.name, "Radio" );
+
+			if ( copy_to_user( arg, &a, sizeof( struct video_audio ) ) )
+				return -EFAULT;
+
+			return 0;			
+		}
+
+		case VIDIOCSAUDIO:
+		{
+			struct video_audio a;
+
+			if ( copy_from_user( &a, arg, sizeof( struct video_audio ) ) ) 
+				return -EFAULT;	
+
+			if ( a.audio ) 
+				return -EINVAL;
+
+			if ( a.flags & VIDEO_AUDIO_MUTE ) 
+				gemtek_pci_mute( card );
+
+			else
+				gemtek_pci_unmute( card );
+
+			return 0;
+		}
+
+		default:
+			return -ENOIOCTLCMD;
+	}
+}
+
+enum {
+	GEMTEK_PR103
+};
+
+static char *card_names[] __devinitdata = {
+	"GEMTEK_PR103"
+};
+
+static struct pci_device_id gemtek_pci_id[] =
+{
+	{ PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
+	  PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
+	{ 0 }
+};
+
+MODULE_DEVICE_TABLE( pci, gemtek_pci_id );
+
+static u8 mx = 1;
+
+static char gemtek_pci_videodev_name[] = "Gemtek PCI Radio";
+
+static inline void gemtek_pci_init_struct( struct video_device *dev )
+{
+	memset( dev, 0, sizeof( struct video_device ) );
+	dev->owner = THIS_MODULE;
+	strcpy( dev->name , gemtek_pci_videodev_name );
+	dev->type = VID_TYPE_TUNER;
+	dev->hardware = VID_HARDWARE_GEMTEK;
+	dev->open = gemtek_pci_open;
+	dev->close = gemtek_pci_close;
+	dev->ioctl = gemtek_pci_ioctl;
+}
+
+static int __devinit gemtek_pci_probe( struct pci_dev *pci_dev, const struct pci_device_id *pci_id )
+{
+	struct gemtek_pci_card *card;
+	struct video_device *devradio;
+
+	if ( (card = kmalloc( sizeof( struct gemtek_pci_card ), GFP_KERNEL )) == NULL ) {
+		printk( KERN_ERR "gemtek_pci: out of memory\n" );
+		return -ENOMEM;
+	}
+	memset( card, 0, sizeof( struct gemtek_pci_card ) );
+
+	if ( pci_enable_device( pci_dev ) ) 
+		goto err_pci;
+	
+	card->iobase = pci_resource_start( pci_dev, 0 );
+	card->length = pci_resource_len( pci_dev, 0 );
+
+	if ( request_region( card->iobase, card->length, card_names[pci_id->driver_data] ) == NULL ) {
+		printk( KERN_ERR "gemtek_pci: i/o port already in use\n" );
+		goto err_pci;
+	}
+
+	pci_read_config_byte( pci_dev, PCI_REVISION_ID, &card->chiprev );
+	pci_read_config_word( pci_dev, PCI_SUBSYSTEM_ID, &card->model );
+
+	pci_set_drvdata( pci_dev, card );
+ 
+	if ( (devradio = kmalloc( sizeof( struct video_device ), GFP_KERNEL )) == NULL ) {
+		printk( KERN_ERR "gemtek_pci: out of memory\n" );
+		goto err_video;
+	}
+	gemtek_pci_init_struct( devradio );
+
+	if ( video_register_device( devradio, VFL_TYPE_RADIO , nr_radio) == -1 ) {
+		kfree( devradio );
+		goto err_video;
+	}
+
+	card->videodev = devradio;
+	devradio->priv = card;
+	gemtek_pci_mute( card );
+
+	printk( KERN_INFO "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n", 
+		card->chiprev, card->iobase, card->iobase + card->length - 1 );
+
+	return 0;
+
+err_video:
+	release_region( card->iobase, card->length );
+
+err_pci:
+	kfree( card );
+	return -ENODEV;        
+}
+
+static void __devexit gemtek_pci_remove( struct pci_dev *pci_dev )
+{
+	struct gemtek_pci_card *card = pci_get_drvdata( pci_dev );
+
+	video_unregister_device( card->videodev );
+	kfree( card->videodev );
+
+	release_region( card->iobase, card->length );
+	
+	if ( mx )
+		gemtek_pci_mute( card );
+
+	kfree( card );
+	
+	pci_set_drvdata( pci_dev, NULL );
+}
+
+static struct pci_driver gemtek_pci_driver =
+{
+    name:	"gemtek_pci",
+id_table:	gemtek_pci_id,
+   probe:	gemtek_pci_probe,
+  remove:	gemtek_pci_remove
+};
+
+static int __init gemtek_pci_init_module( void )
+{
+	return pci_module_init( &gemtek_pci_driver );
+}
+
+static void __exit gemtek_pci_cleanup_module( void )
+{
+	return pci_unregister_driver( &gemtek_pci_driver );
+}
+
+MODULE_AUTHOR( "Vladimir Shebordaev <vshebordaev@mail.ru>" );
+MODULE_DESCRIPTION( "The video4linux driver for the Gemtek PCI Radio Card" );
+MODULE_PARM( mx, "b" );
+MODULE_PARM_DESC( mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not" );
+MODULE_PARM( nr_radio, "i");
+MODULE_PARM_DESC( nr_radio, "video4linux device number to use");
+
+EXPORT_NO_SYMBOLS;
+
+module_init( gemtek_pci_init_module );
+module_exit( gemtek_pci_cleanup_module );
+