/* *************************************************************************** * * radio-gemtek-pci.c - Gemtek PCI Radio driver * (C) 2001 Vladimir Shebordaev * *************************************************************************** * * 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 #include #include #include #include #include #include #include #include #include #include #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 1.1.1.1 2003/06/23 22:18:27 jharrell Exp $"; 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: __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 " ); MODULE_DESCRIPTION( "The video4linux driver for the Gemtek PCI Radio Card" ); MODULE_LICENSE("GPL"); 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 );