Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | *************************************************************************** |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 3 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * radio-gemtek-pci.c - Gemtek PCI Radio driver |
| 5 | * (C) 2001 Vladimir Shebordaev <vshebordaev@mail.ru> |
| 6 | * |
| 7 | *************************************************************************** |
| 8 | * |
| 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. |
| 13 | * |
| 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. |
| 18 | * |
| 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, |
| 22 | * USA. |
| 23 | * |
| 24 | *************************************************************************** |
| 25 | * |
| 26 | * Gemtek Corp still silently refuses to release any specifications |
| 27 | * of their multimedia devices, so the protocol still has to be |
| 28 | * reverse engineered. |
| 29 | * |
| 30 | * The v4l code was inspired by Jonas Munsin's Gemtek serial line |
| 31 | * radio device driver. |
| 32 | * |
| 33 | * Please, let me know if this piece of code was useful :) |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 34 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | * TODO: multiple device support and portability were not tested |
| 36 | * |
| 37 | *************************************************************************** |
| 38 | */ |
| 39 | |
| 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> |
Mauro Carvalho Chehab | 5e87efa | 2006-06-05 10:26:32 -0300 | [diff] [blame] | 47 | #include <media/v4l2-common.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | #include <linux/errno.h> |
| 49 | |
| 50 | #include <asm/io.h> |
| 51 | #include <asm/uaccess.h> |
| 52 | |
| 53 | #ifndef PCI_VENDOR_ID_GEMTEK |
| 54 | #define PCI_VENDOR_ID_GEMTEK 0x5046 |
| 55 | #endif |
| 56 | |
| 57 | #ifndef PCI_DEVICE_ID_GEMTEK_PR103 |
| 58 | #define PCI_DEVICE_ID_GEMTEK_PR103 0x1001 |
| 59 | #endif |
| 60 | |
| 61 | #ifndef GEMTEK_PCI_RANGE_LOW |
| 62 | #define GEMTEK_PCI_RANGE_LOW (87*16000) |
| 63 | #endif |
| 64 | |
| 65 | #ifndef GEMTEK_PCI_RANGE_HIGH |
| 66 | #define GEMTEK_PCI_RANGE_HIGH (108*16000) |
| 67 | #endif |
| 68 | |
| 69 | #ifndef TRUE |
| 70 | #define TRUE (1) |
| 71 | #endif |
| 72 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 73 | #ifndef FALSE |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | #define FALSE (0) |
| 75 | #endif |
| 76 | |
| 77 | struct gemtek_pci_card { |
| 78 | struct video_device *videodev; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 79 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | u32 iobase; |
| 81 | u32 length; |
| 82 | u8 chiprev; |
| 83 | u16 model; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | u32 current_frequency; |
| 86 | u8 mute; |
| 87 | }; |
| 88 | |
| 89 | static const char rcsid[] = "$Id: radio-gemtek-pci.c,v 1.1 2001/07/23 08:08:16 ted Exp ted $"; |
| 90 | |
| 91 | static int nr_radio = -1; |
| 92 | |
| 93 | static inline u8 gemtek_pci_out( u16 value, u32 port ) |
| 94 | { |
| 95 | outw( value, port ); |
| 96 | |
| 97 | return (u8)value; |
| 98 | } |
| 99 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 100 | #define _b0( v ) *((u8 *)&v) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | static void __gemtek_pci_cmd( u16 value, u32 port, u8 *last_byte, int keep ) |
| 102 | { |
| 103 | register u8 byte = *last_byte; |
| 104 | |
| 105 | if ( !value ) { |
| 106 | if ( !keep ) |
| 107 | value = (u16)port; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 108 | byte &= 0xfd; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | } else |
| 110 | byte |= 2; |
| 111 | |
| 112 | _b0( value ) = byte; |
| 113 | outw( value, port ); |
| 114 | byte |= 1; |
| 115 | _b0( value ) = byte; |
| 116 | outw( value, port ); |
| 117 | byte &= 0xfe; |
| 118 | _b0( value ) = byte; |
| 119 | outw( value, port ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | *last_byte = byte; |
| 122 | } |
| 123 | |
| 124 | static inline void gemtek_pci_nil( u32 port, u8 *last_byte ) |
| 125 | { |
| 126 | __gemtek_pci_cmd( 0x00, port, last_byte, FALSE ); |
| 127 | } |
| 128 | |
| 129 | static inline void gemtek_pci_cmd( u16 cmd, u32 port, u8 *last_byte ) |
| 130 | { |
| 131 | __gemtek_pci_cmd( cmd, port, last_byte, TRUE ); |
| 132 | } |
| 133 | |
| 134 | static void gemtek_pci_setfrequency( struct gemtek_pci_card *card, unsigned long frequency ) |
| 135 | { |
| 136 | register int i; |
| 137 | register u32 value = frequency / 200 + 856; |
| 138 | register u16 mask = 0x8000; |
| 139 | u8 last_byte; |
| 140 | u32 port = card->iobase; |
| 141 | |
| 142 | last_byte = gemtek_pci_out( 0x06, port ); |
| 143 | |
| 144 | i = 0; |
| 145 | do { |
| 146 | gemtek_pci_nil( port, &last_byte ); |
| 147 | i++; |
| 148 | } while ( i < 9 ); |
| 149 | |
| 150 | i = 0; |
| 151 | do { |
| 152 | gemtek_pci_cmd( value & mask, port, &last_byte ); |
| 153 | mask >>= 1; |
| 154 | i++; |
| 155 | } while ( i < 16 ); |
| 156 | |
| 157 | outw( 0x10, port ); |
| 158 | } |
| 159 | |
| 160 | |
| 161 | static inline void gemtek_pci_mute( struct gemtek_pci_card *card ) |
| 162 | { |
| 163 | outb( 0x1f, card->iobase ); |
| 164 | card->mute = TRUE; |
| 165 | } |
| 166 | |
| 167 | static inline void gemtek_pci_unmute( struct gemtek_pci_card *card ) |
| 168 | { |
| 169 | if ( card->mute ) { |
| 170 | gemtek_pci_setfrequency( card, card->current_frequency ); |
| 171 | card->mute = FALSE; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | static inline unsigned int gemtek_pci_getsignal( struct gemtek_pci_card *card ) |
| 176 | { |
| 177 | return ( inb( card->iobase ) & 0x08 ) ? 0 : 1; |
| 178 | } |
| 179 | |
| 180 | static int gemtek_pci_do_ioctl(struct inode *inode, struct file *file, |
| 181 | unsigned int cmd, void *arg) |
| 182 | { |
| 183 | struct video_device *dev = video_devdata(file); |
| 184 | struct gemtek_pci_card *card = dev->priv; |
| 185 | |
| 186 | switch ( cmd ) { |
| 187 | case VIDIOCGCAP: |
| 188 | { |
| 189 | struct video_capability *c = arg; |
| 190 | |
| 191 | memset(c,0,sizeof(*c)); |
| 192 | c->type = VID_TYPE_TUNER; |
| 193 | c->channels = 1; |
| 194 | c->audios = 1; |
| 195 | strcpy( c->name, "Gemtek PCI Radio" ); |
| 196 | return 0; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 197 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | |
| 199 | case VIDIOCGTUNER: |
| 200 | { |
| 201 | struct video_tuner *t = arg; |
| 202 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 203 | if ( t->tuner ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | return -EINVAL; |
| 205 | |
| 206 | t->rangelow = GEMTEK_PCI_RANGE_LOW; |
| 207 | t->rangehigh = GEMTEK_PCI_RANGE_HIGH; |
| 208 | t->flags = VIDEO_TUNER_LOW; |
| 209 | t->mode = VIDEO_MODE_AUTO; |
| 210 | t->signal = 0xFFFF * gemtek_pci_getsignal( card ); |
| 211 | strcpy( t->name, "FM" ); |
| 212 | return 0; |
| 213 | } |
| 214 | |
| 215 | case VIDIOCSTUNER: |
| 216 | { |
| 217 | struct video_tuner *t = arg; |
| 218 | if ( t->tuner ) |
| 219 | return -EINVAL; |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | case VIDIOCGFREQ: |
| 224 | { |
| 225 | unsigned long *freq = arg; |
| 226 | *freq = card->current_frequency; |
| 227 | return 0; |
| 228 | } |
| 229 | case VIDIOCSFREQ: |
| 230 | { |
| 231 | unsigned long *freq = arg; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 232 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | if ( (*freq < GEMTEK_PCI_RANGE_LOW) || |
| 234 | (*freq > GEMTEK_PCI_RANGE_HIGH) ) |
| 235 | return -EINVAL; |
| 236 | |
| 237 | gemtek_pci_setfrequency( card, *freq ); |
| 238 | card->current_frequency = *freq; |
| 239 | card->mute = FALSE; |
| 240 | |
| 241 | return 0; |
| 242 | } |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 243 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | case VIDIOCGAUDIO: |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 245 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | struct video_audio *a = arg; |
| 247 | |
| 248 | memset( a, 0, sizeof( *a ) ); |
| 249 | a->flags |= VIDEO_AUDIO_MUTABLE; |
| 250 | a->volume = 1; |
| 251 | a->step = 65535; |
| 252 | strcpy( a->name, "Radio" ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 253 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | case VIDIOCSAUDIO: |
| 257 | { |
| 258 | struct video_audio *a = arg; |
| 259 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 260 | if ( a->audio ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | return -EINVAL; |
| 262 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 263 | if ( a->flags & VIDEO_AUDIO_MUTE ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | gemtek_pci_mute( card ); |
| 265 | else |
| 266 | gemtek_pci_unmute( card ); |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | default: |
| 271 | return -ENOIOCTLCMD; |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | static int gemtek_pci_ioctl(struct inode *inode, struct file *file, |
| 276 | unsigned int cmd, unsigned long arg) |
| 277 | { |
| 278 | return video_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl); |
| 279 | } |
| 280 | |
| 281 | enum { |
| 282 | GEMTEK_PR103 |
| 283 | }; |
| 284 | |
| 285 | static char *card_names[] __devinitdata = { |
| 286 | "GEMTEK_PR103" |
| 287 | }; |
| 288 | |
| 289 | static struct pci_device_id gemtek_pci_id[] = |
| 290 | { |
| 291 | { PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103, |
| 292 | PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 }, |
| 293 | { 0 } |
| 294 | }; |
| 295 | |
| 296 | MODULE_DEVICE_TABLE( pci, gemtek_pci_id ); |
| 297 | |
| 298 | static int mx = 1; |
| 299 | |
| 300 | static struct file_operations gemtek_pci_fops = { |
| 301 | .owner = THIS_MODULE, |
| 302 | .open = video_exclusive_open, |
| 303 | .release = video_exclusive_release, |
| 304 | .ioctl = gemtek_pci_ioctl, |
Arnd Bergmann | 0d0fbf8 | 2006-01-09 15:24:57 -0200 | [diff] [blame] | 305 | .compat_ioctl = v4l_compat_ioctl32, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | .llseek = no_llseek, |
| 307 | }; |
| 308 | |
| 309 | static struct video_device vdev_template = { |
| 310 | .owner = THIS_MODULE, |
| 311 | .name = "Gemtek PCI Radio", |
| 312 | .type = VID_TYPE_TUNER, |
| 313 | .hardware = VID_HARDWARE_GEMTEK, |
| 314 | .fops = &gemtek_pci_fops, |
| 315 | }; |
| 316 | |
| 317 | static int __devinit gemtek_pci_probe( struct pci_dev *pci_dev, const struct pci_device_id *pci_id ) |
| 318 | { |
| 319 | struct gemtek_pci_card *card; |
| 320 | struct video_device *devradio; |
| 321 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 322 | if ( (card = kzalloc( sizeof( struct gemtek_pci_card ), GFP_KERNEL )) == NULL ) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | printk( KERN_ERR "gemtek_pci: out of memory\n" ); |
| 324 | return -ENOMEM; |
| 325 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 327 | if ( pci_enable_device( pci_dev ) ) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | goto err_pci; |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 329 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | card->iobase = pci_resource_start( pci_dev, 0 ); |
| 331 | card->length = pci_resource_len( pci_dev, 0 ); |
| 332 | |
| 333 | if ( request_region( card->iobase, card->length, card_names[pci_id->driver_data] ) == NULL ) { |
| 334 | printk( KERN_ERR "gemtek_pci: i/o port already in use\n" ); |
| 335 | goto err_pci; |
| 336 | } |
| 337 | |
| 338 | pci_read_config_byte( pci_dev, PCI_REVISION_ID, &card->chiprev ); |
| 339 | pci_read_config_word( pci_dev, PCI_SUBSYSTEM_ID, &card->model ); |
| 340 | |
| 341 | pci_set_drvdata( pci_dev, card ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 342 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | if ( (devradio = kmalloc( sizeof( struct video_device ), GFP_KERNEL )) == NULL ) { |
| 344 | printk( KERN_ERR "gemtek_pci: out of memory\n" ); |
| 345 | goto err_video; |
| 346 | } |
| 347 | *devradio = vdev_template; |
| 348 | |
| 349 | if ( video_register_device( devradio, VFL_TYPE_RADIO , nr_radio) == -1 ) { |
| 350 | kfree( devradio ); |
| 351 | goto err_video; |
| 352 | } |
| 353 | |
| 354 | card->videodev = devradio; |
| 355 | devradio->priv = card; |
| 356 | gemtek_pci_mute( card ); |
| 357 | |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 358 | printk( KERN_INFO "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | card->chiprev, card->iobase, card->iobase + card->length - 1 ); |
| 360 | |
| 361 | return 0; |
| 362 | |
| 363 | err_video: |
| 364 | release_region( card->iobase, card->length ); |
| 365 | |
| 366 | err_pci: |
| 367 | kfree( card ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 368 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | |
| 371 | static void __devexit gemtek_pci_remove( struct pci_dev *pci_dev ) |
| 372 | { |
| 373 | struct gemtek_pci_card *card = pci_get_drvdata( pci_dev ); |
| 374 | |
| 375 | video_unregister_device( card->videodev ); |
| 376 | kfree( card->videodev ); |
| 377 | |
| 378 | release_region( card->iobase, card->length ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 379 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | if ( mx ) |
| 381 | gemtek_pci_mute( card ); |
| 382 | |
| 383 | kfree( card ); |
Mauro Carvalho Chehab | 4286c6f | 2006-04-08 16:06:16 -0300 | [diff] [blame] | 384 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | pci_set_drvdata( pci_dev, NULL ); |
| 386 | } |
| 387 | |
| 388 | static struct pci_driver gemtek_pci_driver = |
| 389 | { |
| 390 | .name = "gemtek_pci", |
| 391 | .id_table = gemtek_pci_id, |
| 392 | .probe = gemtek_pci_probe, |
| 393 | .remove = __devexit_p(gemtek_pci_remove), |
| 394 | }; |
| 395 | |
| 396 | static int __init gemtek_pci_init_module( void ) |
| 397 | { |
Richard Knutsson | 9bfab8c | 2005-11-30 00:59:34 +0100 | [diff] [blame] | 398 | return pci_register_driver( &gemtek_pci_driver ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | |
| 401 | static void __exit gemtek_pci_cleanup_module( void ) |
| 402 | { |
| 403 | return pci_unregister_driver( &gemtek_pci_driver ); |
| 404 | } |
| 405 | |
| 406 | MODULE_AUTHOR( "Vladimir Shebordaev <vshebordaev@mail.ru>" ); |
| 407 | MODULE_DESCRIPTION( "The video4linux driver for the Gemtek PCI Radio Card" ); |
| 408 | MODULE_LICENSE("GPL"); |
| 409 | |
| 410 | module_param(mx, bool, 0); |
| 411 | MODULE_PARM_DESC( mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not" ); |
| 412 | module_param(nr_radio, int, 0); |
| 413 | MODULE_PARM_DESC( nr_radio, "video4linux device number to use"); |
| 414 | |
| 415 | module_init( gemtek_pci_init_module ); |
| 416 | module_exit( gemtek_pci_cleanup_module ); |
| 417 | |