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[PATCH] mark struct file_operations const 4
[linux-2.6/kmemtrace.git] / drivers / media / radio / radio-gemtek-pci.c
blob05e5aa77025f992ecba9af5ac5a2a5697677ca16
1 /*
2 ***************************************************************************
3 *
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 :)
34 *
35 * TODO: multiple device support and portability were not tested
36 *
37 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
38 *
39 ***************************************************************************
40 */
41
42 #include <linux/types.h>
43 #include <linux/list.h>
44 #include <linux/module.h>
45 #include <linux/init.h>
46 #include <linux/pci.h>
47 #include <linux/videodev2.h>
48 #include <media/v4l2-common.h>
49 #include <linux/errno.h>
50
51 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
52 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
53
54 static struct v4l2_queryctrl radio_qctrl[] = {
55 {
56 .id = V4L2_CID_AUDIO_MUTE,
57 .name = "Mute",
58 .minimum = 0,
59 .maximum = 1,
60 .default_value = 1,
61 .type = V4L2_CTRL_TYPE_BOOLEAN,
62 },{
63 .id = V4L2_CID_AUDIO_VOLUME,
64 .name = "Volume",
65 .minimum = 0,
66 .maximum = 65535,
67 .step = 65535,
68 .default_value = 0xff,
69 .type = V4L2_CTRL_TYPE_INTEGER,
70 }
71 };
72
73 #include <asm/io.h>
74 #include <asm/uaccess.h>
75
76 #ifndef PCI_VENDOR_ID_GEMTEK
77 #define PCI_VENDOR_ID_GEMTEK 0x5046
78 #endif
79
80 #ifndef PCI_DEVICE_ID_GEMTEK_PR103
81 #define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
82 #endif
83
84 #ifndef GEMTEK_PCI_RANGE_LOW
85 #define GEMTEK_PCI_RANGE_LOW (87*16000)
86 #endif
87
88 #ifndef GEMTEK_PCI_RANGE_HIGH
89 #define GEMTEK_PCI_RANGE_HIGH (108*16000)
90 #endif
91
92 #ifndef TRUE
93 #define TRUE (1)
94 #endif
95
96 #ifndef FALSE
97 #define FALSE (0)
98 #endif
99
100 struct gemtek_pci_card {
101 struct video_device *videodev;
102
103 u32 iobase;
104 u32 length;
105 u8 chiprev;
106 u16 model;
107
108 u32 current_frequency;
109 u8 mute;
110 };
111
112 static const char rcsid[] = "$Id: radio-gemtek-pci.c,v 1.1 2001/07/23 08:08:16 ted Exp ted $";
113
114 static int nr_radio = -1;
115
116 static inline u8 gemtek_pci_out( u16 value, u32 port )
117 {
118 outw( value, port );
119
120 return (u8)value;
121 }
122
123 #define _b0( v ) *((u8 *)&v)
124 static void __gemtek_pci_cmd( u16 value, u32 port, u8 *last_byte, int keep )
125 {
126 register u8 byte = *last_byte;
127
128 if ( !value ) {
129 if ( !keep )
130 value = (u16)port;
131 byte &= 0xfd;
132 } else
133 byte |= 2;
134
135 _b0( value ) = byte;
136 outw( value, port );
137 byte |= 1;
138 _b0( value ) = byte;
139 outw( value, port );
140 byte &= 0xfe;
141 _b0( value ) = byte;
142 outw( value, port );
143
144 *last_byte = byte;
145 }
146
147 static inline void gemtek_pci_nil( u32 port, u8 *last_byte )
148 {
149 __gemtek_pci_cmd( 0x00, port, last_byte, FALSE );
150 }
151
152 static inline void gemtek_pci_cmd( u16 cmd, u32 port, u8 *last_byte )
153 {
154 __gemtek_pci_cmd( cmd, port, last_byte, TRUE );
155 }
156
157 static void gemtek_pci_setfrequency( struct gemtek_pci_card *card, unsigned long frequency )
158 {
159 register int i;
160 register u32 value = frequency / 200 + 856;
161 register u16 mask = 0x8000;
162 u8 last_byte;
163 u32 port = card->iobase;
164
165 last_byte = gemtek_pci_out( 0x06, port );
166
167 i = 0;
168 do {
169 gemtek_pci_nil( port, &last_byte );
170 i++;
171 } while ( i < 9 );
172
173 i = 0;
174 do {
175 gemtek_pci_cmd( value & mask, port, &last_byte );
176 mask >>= 1;
177 i++;
178 } while ( i < 16 );
179
180 outw( 0x10, port );
181 }
182
183
184 static inline void gemtek_pci_mute( struct gemtek_pci_card *card )
185 {
186 outb( 0x1f, card->iobase );
187 card->mute = TRUE;
188 }
189
190 static inline void gemtek_pci_unmute( struct gemtek_pci_card *card )
191 {
192 if ( card->mute ) {
193 gemtek_pci_setfrequency( card, card->current_frequency );
194 card->mute = FALSE;
195 }
196 }
197
198 static inline unsigned int gemtek_pci_getsignal( struct gemtek_pci_card *card )
199 {
200 return ( inb( card->iobase ) & 0x08 ) ? 0 : 1;
201 }
202
203 static int gemtek_pci_do_ioctl(struct inode *inode, struct file *file,
204 unsigned int cmd, void *arg)
205 {
206 struct video_device *dev = video_devdata(file);
207 struct gemtek_pci_card *card = dev->priv;
208
209 switch ( cmd ) {
210 case VIDIOC_QUERYCAP:
211 {
212 struct v4l2_capability *v = arg;
213 memset(v,0,sizeof(*v));
214 strlcpy(v->driver, "radio-gemtek-pci", sizeof (v->driver));
215 strlcpy(v->card, "GemTek PCI Radio", sizeof (v->card));
216 sprintf(v->bus_info,"ISA");
217 v->version = RADIO_VERSION;
218 v->capabilities = V4L2_CAP_TUNER;
219
220 return 0;
221 }
222 case VIDIOC_G_TUNER:
223 {
224 struct v4l2_tuner *v = arg;
225
226 if (v->index > 0)
227 return -EINVAL;
228
229 memset(v,0,sizeof(*v));
230 strcpy(v->name, "FM");
231 v->type = V4L2_TUNER_RADIO;
232
233 v->rangelow = GEMTEK_PCI_RANGE_LOW;
234 v->rangehigh = GEMTEK_PCI_RANGE_HIGH;
235 v->rxsubchans =V4L2_TUNER_SUB_MONO;
236 v->capability=V4L2_TUNER_CAP_LOW;
237 v->audmode = V4L2_TUNER_MODE_MONO;
238 v->signal=0xFFFF*gemtek_pci_getsignal( card );
239
240 return 0;
241 }
242 case VIDIOC_S_TUNER:
243 {
244 struct v4l2_tuner *v = arg;
245
246 if (v->index > 0)
247 return -EINVAL;
248
249 return 0;
250 }
251 case VIDIOC_S_FREQUENCY:
252 {
253 struct v4l2_frequency *f = arg;
254
255 if ( (f->frequency < GEMTEK_PCI_RANGE_LOW) ||
256 (f->frequency > GEMTEK_PCI_RANGE_HIGH) )
257 return -EINVAL;
258
259
260 gemtek_pci_setfrequency( card, f->frequency );
261 card->current_frequency = f->frequency;
262 card->mute = FALSE;
263 return 0;
264 }
265 case VIDIOC_QUERYCTRL:
266 {
267 struct v4l2_queryctrl *qc = arg;
268 int i;
269
270 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
271 if (qc->id && qc->id == radio_qctrl[i].id) {
272 memcpy(qc, &(radio_qctrl[i]),
273 sizeof(*qc));
274 return (0);
275 }
276 }
277 return -EINVAL;
278 }
279 case VIDIOC_G_CTRL:
280 {
281 struct v4l2_control *ctrl= arg;
282
283 switch (ctrl->id) {
284 case V4L2_CID_AUDIO_MUTE:
285 ctrl->value=card->mute;
286 return (0);
287 case V4L2_CID_AUDIO_VOLUME:
288 if (card->mute)
289 ctrl->value=0;
290 else
291 ctrl->value=65535;
292 return (0);
293 }
294 return -EINVAL;
295 }
296 case VIDIOC_S_CTRL:
297 {
298 struct v4l2_control *ctrl= arg;
299
300 switch (ctrl->id) {
301 case V4L2_CID_AUDIO_MUTE:
302 if (ctrl->value) {
303 gemtek_pci_mute(card);
304 } else {
305 gemtek_pci_unmute(card);
306 }
307 return (0);
308 case V4L2_CID_AUDIO_VOLUME:
309 if (ctrl->value) {
310 gemtek_pci_unmute(card);
311 } else {
312 gemtek_pci_mute(card);
313 }
314 return (0);
315 }
316 return -EINVAL;
317 }
318 default:
319 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
320 gemtek_pci_do_ioctl);
321 }
322 }
323
324 static int gemtek_pci_ioctl(struct inode *inode, struct file *file,
325 unsigned int cmd, unsigned long arg)
326 {
327 return video_usercopy(inode, file, cmd, arg, gemtek_pci_do_ioctl);
328 }
329
330 enum {
331 GEMTEK_PR103
332 };
333
334 static char *card_names[] __devinitdata = {
335 "GEMTEK_PR103"
336 };
337
338 static struct pci_device_id gemtek_pci_id[] =
339 {
340 { PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
341 PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
342 { 0 }
343 };
344
345 MODULE_DEVICE_TABLE( pci, gemtek_pci_id );
346
347 static int mx = 1;
348
349 static const struct file_operations gemtek_pci_fops = {
350 .owner = THIS_MODULE,
351 .open = video_exclusive_open,
352 .release = video_exclusive_release,
353 .ioctl = gemtek_pci_ioctl,
354 .compat_ioctl = v4l_compat_ioctl32,
355 .llseek = no_llseek,
356 };
357
358 static struct video_device vdev_template = {
359 .owner = THIS_MODULE,
360 .name = "Gemtek PCI Radio",
361 .type = VID_TYPE_TUNER,
362 .hardware = 0,
363 .fops = &gemtek_pci_fops,
364 };
365
366 static int __devinit gemtek_pci_probe( struct pci_dev *pci_dev, const struct pci_device_id *pci_id )
367 {
368 struct gemtek_pci_card *card;
369 struct video_device *devradio;
370
371 if ( (card = kzalloc( sizeof( struct gemtek_pci_card ), GFP_KERNEL )) == NULL ) {
372 printk( KERN_ERR "gemtek_pci: out of memory\n" );
373 return -ENOMEM;
374 }
375
376 if ( pci_enable_device( pci_dev ) )
377 goto err_pci;
378
379 card->iobase = pci_resource_start( pci_dev, 0 );
380 card->length = pci_resource_len( pci_dev, 0 );
381
382 if ( request_region( card->iobase, card->length, card_names[pci_id->driver_data] ) == NULL ) {
383 printk( KERN_ERR "gemtek_pci: i/o port already in use\n" );
384 goto err_pci;
385 }
386
387 pci_read_config_byte( pci_dev, PCI_REVISION_ID, &card->chiprev );
388 pci_read_config_word( pci_dev, PCI_SUBSYSTEM_ID, &card->model );
389
390 pci_set_drvdata( pci_dev, card );
391
392 if ( (devradio = kmalloc( sizeof( struct video_device ), GFP_KERNEL )) == NULL ) {
393 printk( KERN_ERR "gemtek_pci: out of memory\n" );
394 goto err_video;
395 }
396 *devradio = vdev_template;
397
398 if ( video_register_device( devradio, VFL_TYPE_RADIO , nr_radio) == -1 ) {
399 kfree( devradio );
400 goto err_video;
401 }
402
403 card->videodev = devradio;
404 devradio->priv = card;
405 gemtek_pci_mute( card );
406
407 printk( KERN_INFO "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n",
408 card->chiprev, card->iobase, card->iobase + card->length - 1 );
409
410 return 0;
411
412 err_video:
413 release_region( card->iobase, card->length );
414
415 err_pci:
416 kfree( card );
417 return -ENODEV;
418 }
419
420 static void __devexit gemtek_pci_remove( struct pci_dev *pci_dev )
421 {
422 struct gemtek_pci_card *card = pci_get_drvdata( pci_dev );
423
424 video_unregister_device( card->videodev );
425 kfree( card->videodev );
426
427 release_region( card->iobase, card->length );
428
429 if ( mx )
430 gemtek_pci_mute( card );
431
432 kfree( card );
433
434 pci_set_drvdata( pci_dev, NULL );
435 }
436
437 static struct pci_driver gemtek_pci_driver =
438 {
439 .name = "gemtek_pci",
440 .id_table = gemtek_pci_id,
441 .probe = gemtek_pci_probe,
442 .remove = __devexit_p(gemtek_pci_remove),
443 };
444
445 static int __init gemtek_pci_init_module( void )
446 {
447 return pci_register_driver( &gemtek_pci_driver );
448 }
449
450 static void __exit gemtek_pci_cleanup_module( void )
451 {
452 pci_unregister_driver(&gemtek_pci_driver);
453 }
454
455 MODULE_AUTHOR( "Vladimir Shebordaev <vshebordaev@mail.ru>" );
456 MODULE_DESCRIPTION( "The video4linux driver for the Gemtek PCI Radio Card" );
457 MODULE_LICENSE("GPL");
458
459 module_param(mx, bool, 0);
460 MODULE_PARM_DESC( mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not" );
461 module_param(nr_radio, int, 0);
462 MODULE_PARM_DESC( nr_radio, "video4linux device number to use");
463
464 module_init( gemtek_pci_init_module );
465 module_exit( gemtek_pci_cleanup_module );
466
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