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.Cox@linux.org>
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 <asm/io.h> /* outb, outb_p */
36 #include <asm/uaccess.h> /* copy to/from user */
37 #include <linux/videodev2.h> /* kernel radio structs */
38 #include <media/v4l2-common.h>
40 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
41 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
43 #ifndef CONFIG_RADIO_RTRACK_PORT
44 #define CONFIG_RADIO_RTRACK_PORT -1
47 static int io = CONFIG_RADIO_RTRACK_PORT;
48 static int radio_nr = -1;
49 static struct mutex lock;
55 unsigned long curfreq;
62 static void sleep_delay(long n)
64 /* Sleep nicely for 'n' uS */
65 int d=n/msecs_to_jiffies(1000);
69 msleep(jiffies_to_msecs(d));
72 static void rt_decvol(void)
74 outb(0x58, io); /* volume down + sigstr + on */
76 outb(0xd8, io); /* volume steady + sigstr + on */
79 static void rt_incvol(void)
81 outb(0x98, io); /* volume up + sigstr + on */
83 outb(0xd8, io); /* volume steady + sigstr + on */
86 static void rt_mute(struct rt_device *dev)
90 outb(0xd0, io); /* volume steady, off */
94 static int rt_setvol(struct rt_device *dev, int vol)
100 if(vol == dev->curvol) { /* requested volume = current */
101 if (dev->muted) { /* user is unmuting the card */
103 outb (0xd8, io); /* enable card */
109 if(vol == 0) { /* volume = 0 means mute the card */
110 outb(0x48, io); /* volume down but still "on" */
111 sleep_delay(2000000); /* make sure it's totally down */
112 outb(0xd0, io); /* volume steady, off */
113 dev->curvol = 0; /* track the volume state! */
119 if(vol > dev->curvol)
120 for(i = dev->curvol; i < vol; i++)
123 for(i = dev->curvol; i > vol; i--)
131 /* the 128+64 on these outb's is to keep the volume stable while tuning
132 * without them, the volume _will_ creep up with each frequency change
133 * and bit 4 (+16) is to keep the signal strength meter enabled
136 static void send_0_byte(int port, struct rt_device *dev)
138 if ((dev->curvol == 0) || (dev->muted)) {
139 outb_p(128+64+16+ 1, port); /* wr-enable + data low */
140 outb_p(128+64+16+2+1, port); /* clock */
143 outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */
144 outb_p(128+64+16+8+2+1, port); /* clock */
149 static void send_1_byte(int port, struct rt_device *dev)
151 if ((dev->curvol == 0) || (dev->muted)) {
152 outb_p(128+64+16+4 +1, port); /* wr-enable+data high */
153 outb_p(128+64+16+4+2+1, port); /* clock */
156 outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */
157 outb_p(128+64+16+8+4+2+1, port); /* clock */
163 static int rt_setfreq(struct rt_device *dev, unsigned long freq)
167 /* adapted from radio-aztech.c */
169 /* now uses VIDEO_TUNER_LOW for fine tuning */
171 freq += 171200; /* Add 10.7 MHz IF */
172 freq /= 800; /* Convert to 50 kHz units */
174 mutex_lock(&lock); /* Stop other ops interfering */
176 send_0_byte (io, dev); /* 0: LSB of frequency */
178 for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
180 send_1_byte (io, dev);
182 send_0_byte (io, dev);
184 send_0_byte (io, dev); /* 14: test bit - always 0 */
185 send_0_byte (io, dev); /* 15: test bit - always 0 */
187 send_0_byte (io, dev); /* 16: band data 0 - always 0 */
188 send_0_byte (io, dev); /* 17: band data 1 - always 0 */
189 send_0_byte (io, dev); /* 18: band data 2 - always 0 */
190 send_0_byte (io, dev); /* 19: time base - always 0 */
192 send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */
193 send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */
194 send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */
195 send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */
197 if ((dev->curvol == 0) || (dev->muted))
198 outb (0xd0, io); /* volume steady + sigstr */
200 outb (0xd8, io); /* volume steady + sigstr + on */
207 static int rt_getsigstr(struct rt_device *dev)
209 if (inb(io) & 2) /* bit set = no signal present */
211 return 1; /* signal present */
214 static struct v4l2_queryctrl radio_qctrl[] = {
216 .id = V4L2_CID_AUDIO_MUTE,
221 .type = V4L2_CTRL_TYPE_BOOLEAN,
223 .id = V4L2_CID_AUDIO_VOLUME,
228 .default_value = 0xff,
229 .type = V4L2_CTRL_TYPE_INTEGER,
233 static int vidioc_querycap(struct file *file, void *priv,
234 struct v4l2_capability *v)
236 strlcpy(v->driver, "radio-aimslab", sizeof(v->driver));
237 strlcpy(v->card, "RadioTrack", sizeof(v->card));
238 sprintf(v->bus_info, "ISA");
239 v->version = RADIO_VERSION;
240 v->capabilities = V4L2_CAP_TUNER;
244 static int vidioc_g_tuner(struct file *file, void *priv,
245 struct v4l2_tuner *v)
247 struct video_device *dev = video_devdata(file);
248 struct rt_device *rt = dev->priv;
253 strcpy(v->name, "FM");
254 v->type = V4L2_TUNER_RADIO;
255 v->rangelow = (87*16000);
256 v->rangehigh = (108*16000);
257 v->rxsubchans = V4L2_TUNER_SUB_MONO;
258 v->capability = V4L2_TUNER_CAP_LOW;
259 v->audmode = V4L2_TUNER_MODE_MONO;
260 v->signal = 0xffff*rt_getsigstr(rt);
264 static int vidioc_s_tuner(struct file *file, void *priv,
265 struct v4l2_tuner *v)
272 static int vidioc_s_frequency(struct file *file, void *priv,
273 struct v4l2_frequency *f)
275 struct video_device *dev = video_devdata(file);
276 struct rt_device *rt = dev->priv;
278 rt->curfreq = f->frequency;
279 rt_setfreq(rt, rt->curfreq);
283 static int vidioc_g_frequency(struct file *file, void *priv,
284 struct v4l2_frequency *f)
286 struct video_device *dev = video_devdata(file);
287 struct rt_device *rt = dev->priv;
289 f->type = V4L2_TUNER_RADIO;
290 f->frequency = rt->curfreq;
294 static int vidioc_queryctrl(struct file *file, void *priv,
295 struct v4l2_queryctrl *qc)
299 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
300 if (qc->id && qc->id == radio_qctrl[i].id) {
301 memcpy(qc, &(radio_qctrl[i]),
309 static int vidioc_g_ctrl(struct file *file, void *priv,
310 struct v4l2_control *ctrl)
312 struct video_device *dev = video_devdata(file);
313 struct rt_device *rt = dev->priv;
316 case V4L2_CID_AUDIO_MUTE:
317 ctrl->value = rt->muted;
319 case V4L2_CID_AUDIO_VOLUME:
320 ctrl->value = rt->curvol * 6554;
326 static int vidioc_s_ctrl(struct file *file, void *priv,
327 struct v4l2_control *ctrl)
329 struct video_device *dev = video_devdata(file);
330 struct rt_device *rt = dev->priv;
333 case V4L2_CID_AUDIO_MUTE:
337 rt_setvol(rt,rt->curvol);
339 case V4L2_CID_AUDIO_VOLUME:
340 rt_setvol(rt,ctrl->value);
346 static int vidioc_g_audio (struct file *file, void *priv,
347 struct v4l2_audio *a)
352 strcpy(a->name, "Radio");
353 a->capability = V4L2_AUDCAP_STEREO;
357 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
363 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
370 static int vidioc_s_audio(struct file *file, void *priv,
371 struct v4l2_audio *a)
378 static struct rt_device rtrack_unit;
380 static const struct file_operations rtrack_fops = {
381 .owner = THIS_MODULE,
382 .open = video_exclusive_open,
383 .release = video_exclusive_release,
384 .ioctl = video_ioctl2,
386 .compat_ioctl = v4l_compat_ioctl32,
391 static struct video_device rtrack_radio=
393 .owner = THIS_MODULE,
394 .name = "RadioTrack radio",
395 .type = VID_TYPE_TUNER,
396 .fops = &rtrack_fops,
397 .vidioc_querycap = vidioc_querycap,
398 .vidioc_g_tuner = vidioc_g_tuner,
399 .vidioc_s_tuner = vidioc_s_tuner,
400 .vidioc_g_audio = vidioc_g_audio,
401 .vidioc_s_audio = vidioc_s_audio,
402 .vidioc_g_input = vidioc_g_input,
403 .vidioc_s_input = vidioc_s_input,
404 .vidioc_g_frequency = vidioc_g_frequency,
405 .vidioc_s_frequency = vidioc_s_frequency,
406 .vidioc_queryctrl = vidioc_queryctrl,
407 .vidioc_g_ctrl = vidioc_g_ctrl,
408 .vidioc_s_ctrl = vidioc_s_ctrl,
411 static int __init rtrack_init(void)
415 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
419 if (!request_region(io, 2, "rtrack"))
421 printk(KERN_ERR "rtrack: port 0x%x already in use\n", io);
425 rtrack_radio.priv=&rtrack_unit;
427 if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1)
429 release_region(io, 2);
432 printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n");
434 /* Set up the I/O locking */
438 /* mute card - prevents noisy bootups */
440 /* this ensures that the volume is all the way down */
441 outb(0x48, io); /* volume down but still "on" */
442 sleep_delay(2000000); /* make sure it's totally down */
443 outb(0xc0, io); /* steady volume, mute card */
444 rtrack_unit.curvol = 0;
449 MODULE_AUTHOR("M.Kirkwood");
450 MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
451 MODULE_LICENSE("GPL");
453 module_param(io, int, 0);
454 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
455 module_param(radio_nr, int, 0);
457 static void __exit cleanup_rtrack_module(void)
459 video_unregister_device(&rtrack_radio);
460 release_region(io,2);
463 module_init(rtrack_init);
464 module_exit(cleanup_rtrack_module);