2 ***************************************************************************
4 * radio-gemtek-pci.c - Gemtek PCI Radio driver
5 * (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru>
7 ***************************************************************************
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of
12 * the License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the Free
21 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
24 ***************************************************************************
26 * Gemtek Corp still silently refuses to release any specifications
27 * of their multimedia devices, so the protocol still has to be
30 * The v4l code was inspired by Jonas Munsin's Gemtek serial line
31 * radio device driver.
33 * Please, let me know if this piece of code was useful :)
35 * TODO: multiple device support and portability were not tested
37 ***************************************************************************
40 #include <linux/config.h>
41 #include <linux/types.h>
42 #include <linux/list.h>
43 #include <linux/module.h>
44 #include <linux/init.h>
45 #include <linux/pci.h>
46 #include <linux/videodev.h>
47 #include <linux/errno.h>
50 #include <asm/uaccess.h>
52 #ifndef PCI_VENDOR_ID_GEMTEK
53 #define PCI_VENDOR_ID_GEMTEK 0x5046
56 #ifndef PCI_DEVICE_ID_GEMTEK_PR103
57 #define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
60 #ifndef GEMTEK_PCI_RANGE_LOW
61 #define GEMTEK_PCI_RANGE_LOW (87*16000)
64 #ifndef GEMTEK_PCI_RANGE_HIGH
65 #define GEMTEK_PCI_RANGE_HIGH (108*16000)
76 struct gemtek_pci_card {
77 struct video_device *videodev;
84 u32 current_frequency;
88 static const char rcsid[] = "$Id: radio-gemtek-pci.c,v 1.1 2001/07/23 08:08:16 ted Exp ted $";
90 static int nr_radio = -1;
92 static inline u8 gemtek_pci_out( u16 value, u32 port )
99 #define _b0( v ) *((u8 *)&v)
100 static void __gemtek_pci_cmd( u16 value, u32 port, u8 *last_byte, int keep )
102 register u8 byte = *last_byte;
123 static inline void gemtek_pci_nil( u32 port, u8 *last_byte )
125 __gemtek_pci_cmd( 0x00, port, last_byte, FALSE );
128 static inline void gemtek_pci_cmd( u16 cmd, u32 port, u8 *last_byte )
130 __gemtek_pci_cmd( cmd, port, last_byte, TRUE );
133 static void gemtek_pci_setfrequency( struct gemtek_pci_card *card, unsigned long frequency )
136 register u32 value = frequency / 200 + 856;
137 register u16 mask = 0x8000;
139 u32 port = card->iobase;
141 last_byte = gemtek_pci_out( 0x06, port );
145 gemtek_pci_nil( port, &last_byte );
151 gemtek_pci_cmd( value & mask, port, &last_byte );
160 static inline void gemtek_pci_mute( struct gemtek_pci_card *card )
162 outb( 0x1f, card->iobase );
166 static inline void gemtek_pci_unmute( struct gemtek_pci_card *card )
169 gemtek_pci_setfrequency( card, card->current_frequency );
174 static inline unsigned int gemtek_pci_getsignal( struct gemtek_pci_card *card )
176 return ( inb( card->iobase ) & 0x08 ) ? 0 : 1;
179 static int gemtek_pci_do_ioctl(struct inode *inode, struct file *file,
180 unsigned int cmd, void *arg)
182 struct video_device *dev = video_devdata(file);
183 struct gemtek_pci_card *card = dev->priv;
188 struct video_capability *c = arg;
190 memset(c,0,sizeof(*c));
191 c->type = VID_TYPE_TUNER;
194 strcpy( c->name, "Gemtek PCI Radio" );
200 struct video_tuner *t = arg;
205 t->rangelow = GEMTEK_PCI_RANGE_LOW;
206 t->rangehigh = GEMTEK_PCI_RANGE_HIGH;
207 t->flags = VIDEO_TUNER_LOW;
208 t->mode = VIDEO_MODE_AUTO;
209 t->signal = 0xFFFF * gemtek_pci_getsignal( card );
210 strcpy( t->name, "FM" );
216 struct video_tuner *t = arg;
224 unsigned long *freq = arg;
225 *freq = card->current_frequency;
230 unsigned long *freq = arg;
232 if ( (*freq < GEMTEK_PCI_RANGE_LOW) ||
233 (*freq > GEMTEK_PCI_RANGE_HIGH) )
236 gemtek_pci_setfrequency( card, *freq );
237 card->current_frequency = *freq;
245 struct video_audio *a = arg;
247 memset( a, 0, sizeof( *a ) );
248 a->flags |= VIDEO_AUDIO_MUTABLE;
251 strcpy( a->name, "Radio" );
257 struct video_audio *a = arg;
262 if ( a->flags & VIDEO_AUDIO_MUTE )
263 gemtek_pci_mute( card );
265 gemtek_pci_unmute( card );
274 static int gemtek_pci_ioctl(struct inode *inode, struct file *file,
275 unsigned int cmd, unsigned long arg)
277 return video_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl);
284 static char *card_names[] __devinitdata = {
288 static struct pci_device_id gemtek_pci_id[] =
290 { PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
291 PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
295 MODULE_DEVICE_TABLE( pci, gemtek_pci_id );
299 static struct file_operations gemtek_pci_fops = {
300 .owner = THIS_MODULE,
301 .open = video_exclusive_open,
302 .release = video_exclusive_release,
303 .ioctl = gemtek_pci_ioctl,
304 .compat_ioctl = v4l_compat_ioctl32,
308 static struct video_device vdev_template = {
309 .owner = THIS_MODULE,
310 .name = "Gemtek PCI Radio",
311 .type = VID_TYPE_TUNER,
312 .hardware = VID_HARDWARE_GEMTEK,
313 .fops = &gemtek_pci_fops,
316 static int __devinit gemtek_pci_probe( struct pci_dev *pci_dev, const struct pci_device_id *pci_id )
318 struct gemtek_pci_card *card;
319 struct video_device *devradio;
321 if ( (card = kzalloc( sizeof( struct gemtek_pci_card ), GFP_KERNEL )) == NULL ) {
322 printk( KERN_ERR "gemtek_pci: out of memory\n" );
326 if ( pci_enable_device( pci_dev ) )
329 card->iobase = pci_resource_start( pci_dev, 0 );
330 card->length = pci_resource_len( pci_dev, 0 );
332 if ( request_region( card->iobase, card->length, card_names[pci_id->driver_data] ) == NULL ) {
333 printk( KERN_ERR "gemtek_pci: i/o port already in use\n" );
337 pci_read_config_byte( pci_dev, PCI_REVISION_ID, &card->chiprev );
338 pci_read_config_word( pci_dev, PCI_SUBSYSTEM_ID, &card->model );
340 pci_set_drvdata( pci_dev, card );
342 if ( (devradio = kmalloc( sizeof( struct video_device ), GFP_KERNEL )) == NULL ) {
343 printk( KERN_ERR "gemtek_pci: out of memory\n" );
346 *devradio = vdev_template;
348 if ( video_register_device( devradio, VFL_TYPE_RADIO , nr_radio) == -1 ) {
353 card->videodev = devradio;
354 devradio->priv = card;
355 gemtek_pci_mute( card );
357 printk( KERN_INFO "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n",
358 card->chiprev, card->iobase, card->iobase + card->length - 1 );
363 release_region( card->iobase, card->length );
370 static void __devexit gemtek_pci_remove( struct pci_dev *pci_dev )
372 struct gemtek_pci_card *card = pci_get_drvdata( pci_dev );
374 video_unregister_device( card->videodev );
375 kfree( card->videodev );
377 release_region( card->iobase, card->length );
380 gemtek_pci_mute( card );
384 pci_set_drvdata( pci_dev, NULL );
387 static struct pci_driver gemtek_pci_driver =
389 .name = "gemtek_pci",
390 .id_table = gemtek_pci_id,
391 .probe = gemtek_pci_probe,
392 .remove = __devexit_p(gemtek_pci_remove),
395 static int __init gemtek_pci_init_module( void )
397 return pci_register_driver( &gemtek_pci_driver );
400 static void __exit gemtek_pci_cleanup_module( void )
402 return pci_unregister_driver( &gemtek_pci_driver );
405 MODULE_AUTHOR( "Vladimir Shebordaev <vshebordaev@mail.ru>" );
406 MODULE_DESCRIPTION( "The video4linux driver for the Gemtek PCI Radio Card" );
407 MODULE_LICENSE("GPL");
409 module_param(mx, bool, 0);
410 MODULE_PARM_DESC( mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not" );
411 module_param(nr_radio, int, 0);
412 MODULE_PARM_DESC( nr_radio, "video4linux device number to use");
414 module_init( gemtek_pci_init_module );
415 module_exit( gemtek_pci_cleanup_module );