1 /* GemTek radio card driver for Linux (C) 1998 Jonas Munsin <jmunsin@iki.fi>
3 * GemTek hasn't released any specs on the card, so the protocol had to
4 * be reverse engineered with dosemu.
6 * Besides the protocol changes, this is mostly a copy of:
8 * RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
10 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
11 * Converted to new API by Alan Cox <Alan.Cox@linux.org>
12 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
14 * TODO: Allow for more than one of these foolish entities :-)
16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
19 #include <linux/module.h> /* Modules */
20 #include <linux/init.h> /* Initdata */
21 #include <linux/ioport.h> /* request_region */
22 #include <linux/delay.h> /* udelay */
23 #include <asm/io.h> /* outb, outb_p */
24 #include <asm/uaccess.h> /* copy to/from user */
25 #include <linux/videodev2.h> /* kernel radio structs */
26 #include <media/v4l2-common.h>
27 #include <linux/spinlock.h>
29 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
30 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
32 static struct v4l2_queryctrl radio_qctrl[] = {
34 .id = V4L2_CID_AUDIO_MUTE,
39 .type = V4L2_CTRL_TYPE_BOOLEAN,
41 .id = V4L2_CID_AUDIO_VOLUME,
46 .default_value = 0xff,
47 .type = V4L2_CTRL_TYPE_INTEGER,
51 #ifndef CONFIG_RADIO_GEMTEK_PORT
52 #define CONFIG_RADIO_GEMTEK_PORT -1
55 static int io = CONFIG_RADIO_GEMTEK_PORT;
56 static int radio_nr = -1;
57 static spinlock_t lock;
62 unsigned long curfreq;
69 /* the correct way to mute the gemtek may be to write the last written
70 * frequency || 0x10, but just writing 0x10 once seems to do it as well
72 static void gemtek_mute(struct gemtek_device *dev)
82 static void gemtek_unmute(struct gemtek_device *dev)
92 static void zero(void)
100 static void one(void)
108 static int gemtek_setfreq(struct gemtek_device *dev, unsigned long freq)
112 /* freq = 78.25*((float)freq/16000.0 + 10.52); */
127 /* 28 frequency bits (lsb first) */
128 for (i = 0; i < 14; i++)
133 /* 36 unknown bits */
134 for (i = 0; i < 11; i++)
137 for (i = 0; i < 4; i++)
153 static int gemtek_getsigstr(struct gemtek_device *dev)
159 if (inb(io) & 8) /* bit set = no signal present */
161 return 1; /* signal present */
164 static int vidioc_querycap(struct file *file, void *priv,
165 struct v4l2_capability *v)
167 strlcpy(v->driver, "radio-gemtek", sizeof(v->driver));
168 strlcpy(v->card, "GemTek", sizeof(v->card));
169 sprintf(v->bus_info, "ISA");
170 v->version = RADIO_VERSION;
171 v->capabilities = V4L2_CAP_TUNER;
175 static int vidioc_g_tuner(struct file *file, void *priv,
176 struct v4l2_tuner *v)
178 struct video_device *dev = video_devdata(file);
179 struct gemtek_device *rt = dev->priv;
184 strcpy(v->name, "FM");
185 v->type = V4L2_TUNER_RADIO;
186 v->rangelow = (87*16000);
187 v->rangehigh = (108*16000);
188 v->rxsubchans = V4L2_TUNER_SUB_MONO;
189 v->capability = V4L2_TUNER_CAP_LOW;
190 v->audmode = V4L2_TUNER_MODE_MONO;
191 v->signal = 0xffff*gemtek_getsigstr(rt);
195 static int vidioc_s_tuner(struct file *file, void *priv,
196 struct v4l2_tuner *v)
203 static int vidioc_s_frequency(struct file *file, void *priv,
204 struct v4l2_frequency *f)
206 struct video_device *dev = video_devdata(file);
207 struct gemtek_device *rt = dev->priv;
209 rt->curfreq = f->frequency;
210 /* needs to be called twice in order for getsigstr to work */
211 gemtek_setfreq(rt, rt->curfreq);
212 gemtek_setfreq(rt, rt->curfreq);
216 static int vidioc_g_frequency(struct file *file, void *priv,
217 struct v4l2_frequency *f)
219 struct video_device *dev = video_devdata(file);
220 struct gemtek_device *rt = dev->priv;
222 f->type = V4L2_TUNER_RADIO;
223 f->frequency = rt->curfreq;
227 static int vidioc_queryctrl(struct file *file, void *priv,
228 struct v4l2_queryctrl *qc)
232 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
233 if (qc->id && qc->id == radio_qctrl[i].id) {
234 memcpy(qc, &(radio_qctrl[i]),
242 static int vidioc_g_ctrl(struct file *file, void *priv,
243 struct v4l2_control *ctrl)
245 struct video_device *dev = video_devdata(file);
246 struct gemtek_device *rt = dev->priv;
249 case V4L2_CID_AUDIO_MUTE:
250 ctrl->value = rt->muted;
252 case V4L2_CID_AUDIO_VOLUME:
262 static int vidioc_s_ctrl(struct file *file, void *priv,
263 struct v4l2_control *ctrl)
265 struct video_device *dev = video_devdata(file);
266 struct gemtek_device *rt = dev->priv;
269 case V4L2_CID_AUDIO_MUTE:
275 case V4L2_CID_AUDIO_VOLUME:
285 static int vidioc_g_audio (struct file *file, void *priv,
286 struct v4l2_audio *a)
291 strcpy(a->name, "Radio");
292 a->capability = V4L2_AUDCAP_STEREO;
296 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
302 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
309 static int vidioc_s_audio(struct file *file, void *priv,
310 struct v4l2_audio *a)
317 static struct gemtek_device gemtek_unit;
319 static const struct file_operations gemtek_fops = {
320 .owner = THIS_MODULE,
321 .open = video_exclusive_open,
322 .release = video_exclusive_release,
323 .ioctl = video_ioctl2,
324 .compat_ioctl = v4l_compat_ioctl32,
328 static struct video_device gemtek_radio=
330 .owner = THIS_MODULE,
331 .name = "GemTek radio",
332 .type = VID_TYPE_TUNER,
334 .fops = &gemtek_fops,
335 .vidioc_querycap = vidioc_querycap,
336 .vidioc_g_tuner = vidioc_g_tuner,
337 .vidioc_s_tuner = vidioc_s_tuner,
338 .vidioc_g_audio = vidioc_g_audio,
339 .vidioc_s_audio = vidioc_s_audio,
340 .vidioc_g_input = vidioc_g_input,
341 .vidioc_s_input = vidioc_s_input,
342 .vidioc_g_frequency = vidioc_g_frequency,
343 .vidioc_s_frequency = vidioc_s_frequency,
344 .vidioc_queryctrl = vidioc_queryctrl,
345 .vidioc_g_ctrl = vidioc_g_ctrl,
346 .vidioc_s_ctrl = vidioc_s_ctrl,
349 static int __init gemtek_init(void)
353 printk(KERN_ERR "You must set an I/O address with io=0x20c, io=0x30c, io=0x24c or io=0x34c (io=0x020c or io=0x248 for the combined sound/radiocard)\n");
357 if (!request_region(io, 4, "gemtek"))
359 printk(KERN_ERR "gemtek: port 0x%x already in use\n", io);
363 gemtek_radio.priv=&gemtek_unit;
365 if(video_register_device(&gemtek_radio, VFL_TYPE_RADIO, radio_nr)==-1)
367 release_region(io, 4);
370 printk(KERN_INFO "GemTek Radio Card driver.\n");
372 spin_lock_init(&lock);
374 /* this is _maybe_ unnecessary */
377 /* mute card - prevents noisy bootups */
378 gemtek_unit.muted = 0;
379 gemtek_mute(&gemtek_unit);
384 MODULE_AUTHOR("Jonas Munsin");
385 MODULE_DESCRIPTION("A driver for the GemTek Radio Card");
386 MODULE_LICENSE("GPL");
388 module_param(io, int, 0);
389 MODULE_PARM_DESC(io, "I/O address of the GemTek card (0x20c, 0x30c, 0x24c or 0x34c (0x20c or 0x248 have been reported to work for the combined sound/radiocard)).");
390 module_param(radio_nr, int, 0);
392 static void __exit gemtek_cleanup(void)
394 video_unregister_device(&gemtek_radio);
395 release_region(io,4);
398 module_init(gemtek_init);
399 module_exit(gemtek_cleanup);
403 compile-command: "gcc -c -DMODVERSIONS -D__KERNEL__ -DMODULE -O6 -Wall -Wstrict-prototypes -I /home/blp/tmp/linux-2.1.111-rtrack/include radio-rtrack2.c"