diff options
Diffstat (limited to 'drivers/media/radio/radio-gemtek-pci.c')
| -rw-r--r-- | drivers/media/radio/radio-gemtek-pci.c | 416 |
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 00000000000..630cc786d0a --- /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 ); + |