1 files changed, 416 insertions, 0 deletions

diff --git a/drivers/media/radio/radio-gemtek-pci.c b/drivers/media/radio/radio-gemtek-pci.c
new file mode 100644
index 000000000000..630cc786d0a4
--- /dev/null
+++ b/drivers/media/radio/radio-gemtek-pci.c
@@ -0,0 +1,416 @@
+/*
+ ***************************************************************************
+ *     
+ *     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/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 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_do_ioctl(struct inode *inode, struct file *file,
+                               unsigned int cmd, void *arg)
+{
+        struct video_device *dev = video_devdata(file);
+        struct gemtek_pci_card *card = dev->priv;
+
+        switch ( cmd ) {
+                case VIDIOCGCAP:
+                {
+                        struct video_capability *c = arg;
+
+                        memset(c,0,sizeof(*c));
+                        c->type = VID_TYPE_TUNER;
+                        c->channels = 1;
+                        c->audios = 1;
+                        strcpy( c->name, "Gemtek PCI Radio" );
+                        return 0;
+                } 
+
+                case VIDIOCGTUNER:
+                {
+                        struct video_tuner *t = arg;
+
+                        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" );
+                        return 0;
+                }
+
+                case VIDIOCSTUNER:
+                {
+                        struct video_tuner *t = arg;
+                        if ( t->tuner )
+                                return -EINVAL;
+                        return 0;
+                }
+
+                case VIDIOCGFREQ:
+                {
+                        unsigned long *freq = arg;
+                        *freq = card->current_frequency;
+                        return 0;
+                }
+                case VIDIOCSFREQ:
+                {
+                        unsigned long *freq = arg;
+         
+                        if ( (*freq < GEMTEK_PCI_RANGE_LOW) ||
+                             (*freq > GEMTEK_PCI_RANGE_HIGH) )
+                                return -EINVAL;
+
+                        gemtek_pci_setfrequency( card, *freq );
+                        card->current_frequency = *freq;
+                        card->mute = FALSE;
+
+                        return 0;
+                }
+  
+                case VIDIOCGAUDIO:
+                {       
+                        struct video_audio *a = arg;
+
+                        memset( a, 0, sizeof( *a ) );
+                        a->flags |= VIDEO_AUDIO_MUTABLE;
+                        a->volume = 1;
+                        a->step = 65535;
+                        strcpy( a->name, "Radio" );
+                        return 0;                       
+                }
+
+                case VIDIOCSAUDIO:
+                {
+                        struct video_audio *a = arg;
+
+                        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;
+        }
+}
+
+static int gemtek_pci_ioctl(struct inode *inode, struct file *file,
+                            unsigned int cmd, unsigned long arg)
+{
+        return video_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl);
+}
+
+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 int mx = 1;
+
+static struct file_operations gemtek_pci_fops = {
+        .owner          = THIS_MODULE,
+        .open           = video_exclusive_open,
+        .release        = video_exclusive_release,
+        .ioctl          = gemtek_pci_ioctl,
+        .llseek         = no_llseek,
+};
+
+static struct video_device vdev_template = {
+        .owner         = THIS_MODULE,
+        .name          = "Gemtek PCI Radio",
+        .type          = VID_TYPE_TUNER,
+        .hardware      = VID_HARDWARE_GEMTEK,
+        .fops          = &gemtek_pci_fops,
+};
+
+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;
+        }
+        *devradio = vdev_template;
+
+        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         = __devexit_p(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_LICENSE("GPL");
+
+module_param(mx, bool, 0);
+MODULE_PARM_DESC( mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not" );
+module_param(nr_radio, int, 0);
+MODULE_PARM_DESC( nr_radio, "video4linux device number to use");
+
+module_init( gemtek_pci_init_module );
+module_exit( gemtek_pci_cleanup_module );
+