pcmcia: CompactFlash driver for PA Semi Electra boards
[pv_ops_mirror.git] / drivers / media / radio / radio-aimslab.c
blobf0a67e93d7fd0765a38baece496b3eadc18b2b3a
1 /* radiotrack (radioreveal) driver for Linux radio support
2 * (c) 1997 M. Kirkwood
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>
7 * History:
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);
26 * wait(a_wee_while);
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>
39 #include <asm/semaphore.h> /* Lock for the I/O */
41 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
42 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
44 #ifndef CONFIG_RADIO_RTRACK_PORT
45 #define CONFIG_RADIO_RTRACK_PORT -1
46 #endif
48 static int io = CONFIG_RADIO_RTRACK_PORT;
49 static int radio_nr = -1;
50 static struct mutex lock;
52 struct rt_device
54 int port;
55 int curvol;
56 unsigned long curfreq;
57 int muted;
61 /* local things */
63 static void sleep_delay(long n)
65 /* Sleep nicely for 'n' uS */
66 int d=n/msecs_to_jiffies(1000);
67 if(!d)
68 udelay(n);
69 else
70 msleep(jiffies_to_msecs(d));
73 static void rt_decvol(void)
75 outb(0x58, io); /* volume down + sigstr + on */
76 sleep_delay(100000);
77 outb(0xd8, io); /* volume steady + sigstr + on */
80 static void rt_incvol(void)
82 outb(0x98, io); /* volume up + sigstr + on */
83 sleep_delay(100000);
84 outb(0xd8, io); /* volume steady + sigstr + on */
87 static void rt_mute(struct rt_device *dev)
89 dev->muted = 1;
90 mutex_lock(&lock);
91 outb(0xd0, io); /* volume steady, off */
92 mutex_unlock(&lock);
95 static int rt_setvol(struct rt_device *dev, int vol)
97 int i;
99 mutex_lock(&lock);
101 if(vol == dev->curvol) { /* requested volume = current */
102 if (dev->muted) { /* user is unmuting the card */
103 dev->muted = 0;
104 outb (0xd8, io); /* enable card */
106 mutex_unlock(&lock);
107 return 0;
110 if(vol == 0) { /* volume = 0 means mute the card */
111 outb(0x48, io); /* volume down but still "on" */
112 sleep_delay(2000000); /* make sure it's totally down */
113 outb(0xd0, io); /* volume steady, off */
114 dev->curvol = 0; /* track the volume state! */
115 mutex_unlock(&lock);
116 return 0;
119 dev->muted = 0;
120 if(vol > dev->curvol)
121 for(i = dev->curvol; i < vol; i++)
122 rt_incvol();
123 else
124 for(i = dev->curvol; i > vol; i--)
125 rt_decvol();
127 dev->curvol = vol;
128 mutex_unlock(&lock);
129 return 0;
132 /* the 128+64 on these outb's is to keep the volume stable while tuning
133 * without them, the volume _will_ creep up with each frequency change
134 * and bit 4 (+16) is to keep the signal strength meter enabled
137 static void send_0_byte(int port, struct rt_device *dev)
139 if ((dev->curvol == 0) || (dev->muted)) {
140 outb_p(128+64+16+ 1, port); /* wr-enable + data low */
141 outb_p(128+64+16+2+1, port); /* clock */
143 else {
144 outb_p(128+64+16+8+ 1, port); /* on + wr-enable + data low */
145 outb_p(128+64+16+8+2+1, port); /* clock */
147 sleep_delay(1000);
150 static void send_1_byte(int port, struct rt_device *dev)
152 if ((dev->curvol == 0) || (dev->muted)) {
153 outb_p(128+64+16+4 +1, port); /* wr-enable+data high */
154 outb_p(128+64+16+4+2+1, port); /* clock */
156 else {
157 outb_p(128+64+16+8+4 +1, port); /* on+wr-enable+data high */
158 outb_p(128+64+16+8+4+2+1, port); /* clock */
161 sleep_delay(1000);
164 static int rt_setfreq(struct rt_device *dev, unsigned long freq)
166 int i;
168 /* adapted from radio-aztech.c */
170 /* now uses VIDEO_TUNER_LOW for fine tuning */
172 freq += 171200; /* Add 10.7 MHz IF */
173 freq /= 800; /* Convert to 50 kHz units */
175 mutex_lock(&lock); /* Stop other ops interfering */
177 send_0_byte (io, dev); /* 0: LSB of frequency */
179 for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
180 if (freq & (1 << i))
181 send_1_byte (io, dev);
182 else
183 send_0_byte (io, dev);
185 send_0_byte (io, dev); /* 14: test bit - always 0 */
186 send_0_byte (io, dev); /* 15: test bit - always 0 */
188 send_0_byte (io, dev); /* 16: band data 0 - always 0 */
189 send_0_byte (io, dev); /* 17: band data 1 - always 0 */
190 send_0_byte (io, dev); /* 18: band data 2 - always 0 */
191 send_0_byte (io, dev); /* 19: time base - always 0 */
193 send_0_byte (io, dev); /* 20: spacing (0 = 25 kHz) */
194 send_1_byte (io, dev); /* 21: spacing (1 = 25 kHz) */
195 send_0_byte (io, dev); /* 22: spacing (0 = 25 kHz) */
196 send_1_byte (io, dev); /* 23: AM/FM (FM = 1, always) */
198 if ((dev->curvol == 0) || (dev->muted))
199 outb (0xd0, io); /* volume steady + sigstr */
200 else
201 outb (0xd8, io); /* volume steady + sigstr + on */
203 mutex_unlock(&lock);
205 return 0;
208 static int rt_getsigstr(struct rt_device *dev)
210 if (inb(io) & 2) /* bit set = no signal present */
211 return 0;
212 return 1; /* signal present */
215 static struct v4l2_queryctrl radio_qctrl[] = {
217 .id = V4L2_CID_AUDIO_MUTE,
218 .name = "Mute",
219 .minimum = 0,
220 .maximum = 1,
221 .default_value = 1,
222 .type = V4L2_CTRL_TYPE_BOOLEAN,
224 .id = V4L2_CID_AUDIO_VOLUME,
225 .name = "Volume",
226 .minimum = 0,
227 .maximum = 0xff,
228 .step = 1,
229 .default_value = 0xff,
230 .type = V4L2_CTRL_TYPE_INTEGER,
234 static int vidioc_querycap(struct file *file, void *priv,
235 struct v4l2_capability *v)
237 strlcpy(v->driver, "radio-aimslab", sizeof(v->driver));
238 strlcpy(v->card, "RadioTrack", sizeof(v->card));
239 sprintf(v->bus_info, "ISA");
240 v->version = RADIO_VERSION;
241 v->capabilities = V4L2_CAP_TUNER;
242 return 0;
245 static int vidioc_g_tuner(struct file *file, void *priv,
246 struct v4l2_tuner *v)
248 struct video_device *dev = video_devdata(file);
249 struct rt_device *rt = dev->priv;
251 if (v->index > 0)
252 return -EINVAL;
254 strcpy(v->name, "FM");
255 v->type = V4L2_TUNER_RADIO;
256 v->rangelow = (87*16000);
257 v->rangehigh = (108*16000);
258 v->rxsubchans = V4L2_TUNER_SUB_MONO;
259 v->capability = V4L2_TUNER_CAP_LOW;
260 v->audmode = V4L2_TUNER_MODE_MONO;
261 v->signal = 0xffff*rt_getsigstr(rt);
262 return 0;
265 static int vidioc_s_tuner(struct file *file, void *priv,
266 struct v4l2_tuner *v)
268 if (v->index > 0)
269 return -EINVAL;
270 return 0;
273 static int vidioc_s_frequency(struct file *file, void *priv,
274 struct v4l2_frequency *f)
276 struct video_device *dev = video_devdata(file);
277 struct rt_device *rt = dev->priv;
279 rt->curfreq = f->frequency;
280 rt_setfreq(rt, rt->curfreq);
281 return 0;
284 static int vidioc_g_frequency(struct file *file, void *priv,
285 struct v4l2_frequency *f)
287 struct video_device *dev = video_devdata(file);
288 struct rt_device *rt = dev->priv;
290 f->type = V4L2_TUNER_RADIO;
291 f->frequency = rt->curfreq;
292 return 0;
295 static int vidioc_queryctrl(struct file *file, void *priv,
296 struct v4l2_queryctrl *qc)
298 int i;
300 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
301 if (qc->id && qc->id == radio_qctrl[i].id) {
302 memcpy(qc, &(radio_qctrl[i]),
303 sizeof(*qc));
304 return 0;
307 return -EINVAL;
310 static int vidioc_g_ctrl(struct file *file, void *priv,
311 struct v4l2_control *ctrl)
313 struct video_device *dev = video_devdata(file);
314 struct rt_device *rt = dev->priv;
316 switch (ctrl->id) {
317 case V4L2_CID_AUDIO_MUTE:
318 ctrl->value = rt->muted;
319 return 0;
320 case V4L2_CID_AUDIO_VOLUME:
321 ctrl->value = rt->curvol * 6554;
322 return 0;
324 return -EINVAL;
327 static int vidioc_s_ctrl(struct file *file, void *priv,
328 struct v4l2_control *ctrl)
330 struct video_device *dev = video_devdata(file);
331 struct rt_device *rt = dev->priv;
333 switch (ctrl->id) {
334 case V4L2_CID_AUDIO_MUTE:
335 if (ctrl->value)
336 rt_mute(rt);
337 else
338 rt_setvol(rt,rt->curvol);
339 return 0;
340 case V4L2_CID_AUDIO_VOLUME:
341 rt_setvol(rt,ctrl->value);
342 return 0;
344 return -EINVAL;
347 static int vidioc_g_audio (struct file *file, void *priv,
348 struct v4l2_audio *a)
350 if (a->index > 1)
351 return -EINVAL;
353 strcpy(a->name, "Radio");
354 a->capability = V4L2_AUDCAP_STEREO;
355 return 0;
358 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
360 *i = 0;
361 return 0;
364 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
366 if (i != 0)
367 return -EINVAL;
368 return 0;
371 static int vidioc_s_audio(struct file *file, void *priv,
372 struct v4l2_audio *a)
374 if (a->index != 0)
375 return -EINVAL;
376 return 0;
379 static struct rt_device rtrack_unit;
381 static const struct file_operations rtrack_fops = {
382 .owner = THIS_MODULE,
383 .open = video_exclusive_open,
384 .release = video_exclusive_release,
385 .ioctl = video_ioctl2,
386 .compat_ioctl = v4l_compat_ioctl32,
387 .llseek = no_llseek,
390 static struct video_device rtrack_radio=
392 .owner = THIS_MODULE,
393 .name = "RadioTrack radio",
394 .type = VID_TYPE_TUNER,
395 .fops = &rtrack_fops,
396 .vidioc_querycap = vidioc_querycap,
397 .vidioc_g_tuner = vidioc_g_tuner,
398 .vidioc_s_tuner = vidioc_s_tuner,
399 .vidioc_g_audio = vidioc_g_audio,
400 .vidioc_s_audio = vidioc_s_audio,
401 .vidioc_g_input = vidioc_g_input,
402 .vidioc_s_input = vidioc_s_input,
403 .vidioc_g_frequency = vidioc_g_frequency,
404 .vidioc_s_frequency = vidioc_s_frequency,
405 .vidioc_queryctrl = vidioc_queryctrl,
406 .vidioc_g_ctrl = vidioc_g_ctrl,
407 .vidioc_s_ctrl = vidioc_s_ctrl,
410 static int __init rtrack_init(void)
412 if(io==-1)
414 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
415 return -EINVAL;
418 if (!request_region(io, 2, "rtrack"))
420 printk(KERN_ERR "rtrack: port 0x%x already in use\n", io);
421 return -EBUSY;
424 rtrack_radio.priv=&rtrack_unit;
426 if(video_register_device(&rtrack_radio, VFL_TYPE_RADIO, radio_nr)==-1)
428 release_region(io, 2);
429 return -EINVAL;
431 printk(KERN_INFO "AIMSlab RadioTrack/RadioReveal card driver.\n");
433 /* Set up the I/O locking */
435 mutex_init(&lock);
437 /* mute card - prevents noisy bootups */
439 /* this ensures that the volume is all the way down */
440 outb(0x48, io); /* volume down but still "on" */
441 sleep_delay(2000000); /* make sure it's totally down */
442 outb(0xc0, io); /* steady volume, mute card */
443 rtrack_unit.curvol = 0;
445 return 0;
448 MODULE_AUTHOR("M.Kirkwood");
449 MODULE_DESCRIPTION("A driver for the RadioTrack/RadioReveal radio card.");
450 MODULE_LICENSE("GPL");
452 module_param(io, int, 0);
453 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20f or 0x30f)");
454 module_param(radio_nr, int, 0);
456 static void __exit cleanup_rtrack_module(void)
458 video_unregister_device(&rtrack_radio);
459 release_region(io,2);
462 module_init(rtrack_init);
463 module_exit(cleanup_rtrack_module);