1 /* radiotrack (radioreveal) driver for Linux radio support
3 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
4 * Converted to new API by Alan Cox <alan@lxorguk.ukuu.org.uk>
5 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
8 * 1999-02-24 Russell Kroll <rkroll@exploits.org>
9 * Fine tuning/VIDEO_TUNER_LOW
10 * Frequency range expanded to start at 87 MHz
12 * TODO: Allow for more than one of these foolish entities :-)
14 * Notes on the hardware (reverse engineered from other peoples'
15 * reverse engineering of AIMS' code :-)
17 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
19 * The signal strength query is unsurprisingly inaccurate. And it seems
20 * to indicate that (on my card, at least) the frequency setting isn't
21 * too great. (I have to tune up .025MHz from what the freq should be
22 * to get a report that the thing is tuned.)
24 * Volume control is (ugh) analogue:
25 * out(port, start_increasing_volume);
27 * out(port, stop_changing_the_volume);
31 #include <linux/module.h> /* Modules */
32 #include <linux/init.h> /* Initdata */
33 #include <linux/ioport.h> /* request_region */
34 #include <linux/delay.h> /* udelay */
35 #include <linux/videodev2.h> /* kernel radio structs */
36 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
37 #include <linux/io.h> /* outb, outb_p */
38 #include <media/v4l2-device.h>
39 #include <media/v4l2-ioctl.h>
41 MODULE_AUTHOR("M.Kirkwood");
42 MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
43 MODULE_LICENSE("GPL");
45 #ifndef CONFIG_RADIO_RTRACK_PORT
46 #define CONFIG_RADIO_RTRACK_PORT -1
49 static int io = CONFIG_RADIO_RTRACK_PORT;
50 static int radio_nr = -1;
52 module_param(io, int, 0);
53 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
54 module_param(radio_nr, int, 0);
56 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
60 struct v4l2_device v4l2_dev;
61 struct video_device vdev;
64 unsigned long curfreq;
70 static struct rtrack rtrack_card;
74 static void sleep_delay(long n)
76 /* Sleep nicely for 'n' uS */
77 int d = n / msecs_to_jiffies(1000);
81 msleep(jiffies_to_msecs(d));
84 static void rt_decvol(struct rtrack *rt)
86 outb(0x58, rt->io); /* volume down + sigstr + on */
88 outb(0xd8, rt->io); /* volume steady + sigstr + on */
91 static void rt_incvol(struct rtrack *rt)
93 outb(0x98, rt->io); /* volume up + sigstr + on */
95 outb(0xd8, rt->io); /* volume steady + sigstr + on */
98 static void rt_mute(struct rtrack *rt)
101 mutex_lock(&rt->lock);
102 outb(0xd0, rt->io); /* volume steady, off */
103 mutex_unlock(&rt->lock);
106 static int rt_setvol(struct rtrack *rt, int vol)
110 mutex_lock(&rt->lock);
112 if (vol == rt->curvol) { /* requested volume = current */
113 if (rt->muted) { /* user is unmuting the card */
115 outb(0xd8, rt->io); /* enable card */
117 mutex_unlock(&rt->lock);
121 if (vol == 0) { /* volume = 0 means mute the card */
122 outb(0x48, rt->io); /* volume down but still "on" */
123 sleep_delay(2000000); /* make sure it's totally down */
124 outb(0xd0, rt->io); /* volume steady, off */
125 rt->curvol = 0; /* track the volume state! */
126 mutex_unlock(&rt->lock);
131 if (vol > rt->curvol)
132 for (i = rt->curvol; i < vol; i++)
135 for (i = rt->curvol; i > vol; i--)
139 mutex_unlock(&rt->lock);
143 /* the 128+64 on these outb's is to keep the volume stable while tuning
144 * without them, the volume _will_ creep up with each frequency change
145 * and bit 4 (+16) is to keep the signal strength meter enabled
148 static void send_0_byte(struct rtrack *rt)
150 if (rt->curvol == 0 || rt->muted) {
151 outb_p(128+64+16+ 1, rt->io); /* wr-enable + data low */
152 outb_p(128+64+16+2+1, rt->io); /* clock */
155 outb_p(128+64+16+8+ 1, rt->io); /* on + wr-enable + data low */
156 outb_p(128+64+16+8+2+1, rt->io); /* clock */
161 static void send_1_byte(struct rtrack *rt)
163 if (rt->curvol == 0 || rt->muted) {
164 outb_p(128+64+16+4 +1, rt->io); /* wr-enable+data high */
165 outb_p(128+64+16+4+2+1, rt->io); /* clock */
168 outb_p(128+64+16+8+4 +1, rt->io); /* on+wr-enable+data high */
169 outb_p(128+64+16+8+4+2+1, rt->io); /* clock */
175 static int rt_setfreq(struct rtrack *rt, unsigned long freq)
179 mutex_lock(&rt->lock); /* Stop other ops interfering */
183 /* now uses VIDEO_TUNER_LOW for fine tuning */
185 freq += 171200; /* Add 10.7 MHz IF */
186 freq /= 800; /* Convert to 50 kHz units */
188 send_0_byte(rt); /* 0: LSB of frequency */
190 for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
196 send_0_byte(rt); /* 14: test bit - always 0 */
197 send_0_byte(rt); /* 15: test bit - always 0 */
199 send_0_byte(rt); /* 16: band data 0 - always 0 */
200 send_0_byte(rt); /* 17: band data 1 - always 0 */
201 send_0_byte(rt); /* 18: band data 2 - always 0 */
202 send_0_byte(rt); /* 19: time base - always 0 */
204 send_0_byte(rt); /* 20: spacing (0 = 25 kHz) */
205 send_1_byte(rt); /* 21: spacing (1 = 25 kHz) */
206 send_0_byte(rt); /* 22: spacing (0 = 25 kHz) */
207 send_1_byte(rt); /* 23: AM/FM (FM = 1, always) */
209 if (rt->curvol == 0 || rt->muted)
210 outb(0xd0, rt->io); /* volume steady + sigstr */
212 outb(0xd8, rt->io); /* volume steady + sigstr + on */
214 mutex_unlock(&rt->lock);
219 static int rt_getsigstr(struct rtrack *rt)
223 mutex_lock(&rt->lock);
224 if (inb(rt->io) & 2) /* bit set = no signal present */
226 mutex_unlock(&rt->lock);
230 static int vidioc_querycap(struct file *file, void *priv,
231 struct v4l2_capability *v)
233 strlcpy(v->driver, "radio-aimslab", sizeof(v->driver));
234 strlcpy(v->card, "RadioTrack", sizeof(v->card));
235 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
236 v->version = RADIO_VERSION;
237 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
241 static int vidioc_g_tuner(struct file *file, void *priv,
242 struct v4l2_tuner *v)
244 struct rtrack *rt = video_drvdata(file);
249 strlcpy(v->name, "FM", sizeof(v->name));
250 v->type = V4L2_TUNER_RADIO;
251 v->rangelow = 87 * 16000;
252 v->rangehigh = 108 * 16000;
253 v->rxsubchans = V4L2_TUNER_SUB_MONO;
254 v->capability = V4L2_TUNER_CAP_LOW;
255 v->audmode = V4L2_TUNER_MODE_MONO;
256 v->signal = 0xffff * rt_getsigstr(rt);
260 static int vidioc_s_tuner(struct file *file, void *priv,
261 struct v4l2_tuner *v)
263 return v->index ? -EINVAL : 0;
266 static int vidioc_s_frequency(struct file *file, void *priv,
267 struct v4l2_frequency *f)
269 struct rtrack *rt = video_drvdata(file);
271 rt_setfreq(rt, f->frequency);
275 static int vidioc_g_frequency(struct file *file, void *priv,
276 struct v4l2_frequency *f)
278 struct rtrack *rt = video_drvdata(file);
280 f->type = V4L2_TUNER_RADIO;
281 f->frequency = rt->curfreq;
285 static int vidioc_queryctrl(struct file *file, void *priv,
286 struct v4l2_queryctrl *qc)
289 case V4L2_CID_AUDIO_MUTE:
290 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
291 case V4L2_CID_AUDIO_VOLUME:
292 return v4l2_ctrl_query_fill(qc, 0, 0xff, 1, 0xff);
297 static int vidioc_g_ctrl(struct file *file, void *priv,
298 struct v4l2_control *ctrl)
300 struct rtrack *rt = video_drvdata(file);
303 case V4L2_CID_AUDIO_MUTE:
304 ctrl->value = rt->muted;
306 case V4L2_CID_AUDIO_VOLUME:
307 ctrl->value = rt->curvol;
313 static int vidioc_s_ctrl(struct file *file, void *priv,
314 struct v4l2_control *ctrl)
316 struct rtrack *rt = video_drvdata(file);
319 case V4L2_CID_AUDIO_MUTE:
323 rt_setvol(rt, rt->curvol);
325 case V4L2_CID_AUDIO_VOLUME:
326 rt_setvol(rt, ctrl->value);
332 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
338 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
340 return i ? -EINVAL : 0;
343 static int vidioc_g_audio(struct file *file, void *priv,
344 struct v4l2_audio *a)
347 strlcpy(a->name, "Radio", sizeof(a->name));
348 a->capability = V4L2_AUDCAP_STEREO;
352 static int vidioc_s_audio(struct file *file, void *priv,
353 struct v4l2_audio *a)
355 return a->index ? -EINVAL : 0;
358 static const struct v4l2_file_operations rtrack_fops = {
359 .owner = THIS_MODULE,
360 .ioctl = video_ioctl2,
363 static const struct v4l2_ioctl_ops rtrack_ioctl_ops = {
364 .vidioc_querycap = vidioc_querycap,
365 .vidioc_g_tuner = vidioc_g_tuner,
366 .vidioc_s_tuner = vidioc_s_tuner,
367 .vidioc_g_audio = vidioc_g_audio,
368 .vidioc_s_audio = vidioc_s_audio,
369 .vidioc_g_input = vidioc_g_input,
370 .vidioc_s_input = vidioc_s_input,
371 .vidioc_g_frequency = vidioc_g_frequency,
372 .vidioc_s_frequency = vidioc_s_frequency,
373 .vidioc_queryctrl = vidioc_queryctrl,
374 .vidioc_g_ctrl = vidioc_g_ctrl,
375 .vidioc_s_ctrl = vidioc_s_ctrl,
378 static int __init rtrack_init(void)
380 struct rtrack *rt = &rtrack_card;
381 struct v4l2_device *v4l2_dev = &rt->v4l2_dev;
384 strlcpy(v4l2_dev->name, "rtrack", sizeof(v4l2_dev->name));
388 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x20f or 0x30f\n");
392 if (!request_region(rt->io, 2, "rtrack")) {
393 v4l2_err(v4l2_dev, "port 0x%x already in use\n", rt->io);
397 res = v4l2_device_register(NULL, v4l2_dev);
399 release_region(rt->io, 2);
400 v4l2_err(v4l2_dev, "could not register v4l2_device\n");
404 strlcpy(rt->vdev.name, v4l2_dev->name, sizeof(rt->vdev.name));
405 rt->vdev.v4l2_dev = v4l2_dev;
406 rt->vdev.fops = &rtrack_fops;
407 rt->vdev.ioctl_ops = &rtrack_ioctl_ops;
408 rt->vdev.release = video_device_release_empty;
409 video_set_drvdata(&rt->vdev, rt);
411 if (video_register_device(&rt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
412 v4l2_device_unregister(&rt->v4l2_dev);
413 release_region(rt->io, 2);
416 v4l2_info(v4l2_dev, "AIMSlab RadioTrack/RadioReveal card driver.\n");
418 /* Set up the I/O locking */
420 mutex_init(&rt->lock);
422 /* mute card - prevents noisy bootups */
424 /* this ensures that the volume is all the way down */
425 outb(0x48, rt->io); /* volume down but still "on" */
426 sleep_delay(2000000); /* make sure it's totally down */
427 outb(0xc0, rt->io); /* steady volume, mute card */
432 static void __exit rtrack_exit(void)
434 struct rtrack *rt = &rtrack_card;
436 video_unregister_device(&rt->vdev);
437 v4l2_device_unregister(&rt->v4l2_dev);
438 release_region(rt->io, 2);
441 module_init(rtrack_init);
442 module_exit(rtrack_exit);