| /* |
| *************************************************************************** |
| * |
| * 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 <media/v4l2-common.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, |
| .compat_ioctl = v4l_compat_ioctl32, |
| .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 = kzalloc( sizeof( struct gemtek_pci_card ), GFP_KERNEL )) == NULL ) { |
| printk( KERN_ERR "gemtek_pci: out of memory\n" ); |
| return -ENOMEM; |
| } |
| |
| 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_register_driver( &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 ); |
| |