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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 | /* radio-aztech.c - Aztech radio card driver for Linux 2.2
*
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
* Adapted to support the Video for Linux API by
* Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
*
* Quay Ly
* Donald Song
* Jason Lewis (jlewis@twilight.vtc.vsc.edu)
* Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
* William McGrath (wmcgrath@twilight.vtc.vsc.edu)
*
* The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
* along with more information on the card itself.
*
* History:
* 1999-02-24 Russell Kroll <rkroll@exploits.org>
* Fine tuning/VIDEO_TUNER_LOW
* Range expanded to 87-108 MHz (from 87.9-107.8)
*
* Notable changes from the original source:
* - includes stripped down to the essentials
* - for loops used as delays replaced with udelay()
* - #defines removed, changed to static values
* - tuning structure changed - no more character arrays, other changes
*/
#include <linux/module.h> /* Modules */
#include <linux/init.h> /* Initdata */
#include <linux/ioport.h> /* request_region */
#include <linux/delay.h> /* udelay */
#include <asm/io.h> /* outb, outb_p */
#include <asm/uaccess.h> /* copy to/from user */
#include <linux/videodev2.h> /* kernel radio structs */
#include <media/v4l2-common.h>
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
static struct v4l2_queryctrl radio_qctrl[] = {
{
.id = V4L2_CID_AUDIO_MUTE,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.default_value = 1,
.type = V4L2_CTRL_TYPE_BOOLEAN,
},{
.id = V4L2_CID_AUDIO_VOLUME,
.name = "Volume",
.minimum = 0,
.maximum = 0xff,
.step = 1,
.default_value = 0xff,
.type = V4L2_CTRL_TYPE_INTEGER,
}
};
/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
#ifndef CONFIG_RADIO_AZTECH_PORT
#define CONFIG_RADIO_AZTECH_PORT -1
#endif
static int io = CONFIG_RADIO_AZTECH_PORT;
static int radio_nr = -1;
static int radio_wait_time = 1000;
static struct mutex lock;
struct az_device
{
int curvol;
unsigned long curfreq;
int stereo;
};
static int volconvert(int level)
{
level>>=14; /* Map 16bits down to 2 bit */
level&=3;
/* convert to card-friendly values */
switch (level)
{
case 0:
return 0;
case 1:
return 1;
case 2:
return 4;
case 3:
return 5;
}
return 0; /* Quieten gcc */
}
static void send_0_byte (struct az_device *dev)
{
udelay(radio_wait_time);
outb_p(2+volconvert(dev->curvol), io);
outb_p(64+2+volconvert(dev->curvol), io);
}
static void send_1_byte (struct az_device *dev)
{
udelay (radio_wait_time);
outb_p(128+2+volconvert(dev->curvol), io);
outb_p(128+64+2+volconvert(dev->curvol), io);
}
static int az_setvol(struct az_device *dev, int vol)
{
mutex_lock(&lock);
outb (volconvert(vol), io);
mutex_unlock(&lock);
return 0;
}
/* thanks to Michael Dwyer for giving me a dose of clues in
* the signal strength department..
*
* This card has a stereo bit - bit 0 set = mono, not set = stereo
* It also has a "signal" bit - bit 1 set = bad signal, not set = good
*
*/
static int az_getsigstr(struct az_device *dev)
{
if (inb(io) & 2) /* bit set = no signal present */
return 0;
return 1; /* signal present */
}
static int az_getstereo(struct az_device *dev)
{
if (inb(io) & 1) /* bit set = mono */
return 0;
return 1; /* stereo */
}
static int az_setfreq(struct az_device *dev, unsigned long frequency)
{
int i;
frequency += 171200; /* Add 10.7 MHz IF */
frequency /= 800; /* Convert to 50 kHz units */
mutex_lock(&lock);
send_0_byte (dev); /* 0: LSB of frequency */
for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
if (frequency & (1 << i))
send_1_byte (dev);
else
send_0_byte (dev);
send_0_byte (dev); /* 14: test bit - always 0 */
send_0_byte (dev); /* 15: test bit - always 0 */
send_0_byte (dev); /* 16: band data 0 - always 0 */
if (dev->stereo) /* 17: stereo (1 to enable) */
send_1_byte (dev);
else
send_0_byte (dev);
send_1_byte (dev); /* 18: band data 1 - unknown */
send_0_byte (dev); /* 19: time base - always 0 */
send_0_byte (dev); /* 20: spacing (0 = 25 kHz) */
send_1_byte (dev); /* 21: spacing (1 = 25 kHz) */
send_0_byte (dev); /* 22: spacing (0 = 25 kHz) */
send_1_byte (dev); /* 23: AM/FM (FM = 1, always) */
/* latch frequency */
udelay (radio_wait_time);
outb_p(128+64+volconvert(dev->curvol), io);
mutex_unlock(&lock);
return 0;
}
static int vidioc_querycap (struct file *file, void *priv,
struct v4l2_capability *v)
{
strlcpy(v->driver, "radio-aztech", sizeof (v->driver));
strlcpy(v->card, "Aztech Radio", sizeof (v->card));
sprintf(v->bus_info,"ISA");
v->version = RADIO_VERSION;
v->capabilities = V4L2_CAP_TUNER;
return 0;
}
static int vidioc_g_tuner (struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct video_device *dev = video_devdata(file);
struct az_device *az = dev->priv;
if (v->index > 0)
return -EINVAL;
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
v->rangelow=(87*16000);
v->rangehigh=(108*16000);
v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
v->capability=V4L2_TUNER_CAP_LOW;
if(az_getstereo(az))
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal=0xFFFF*az_getsigstr(az);
return 0;
}
static int vidioc_s_tuner (struct file *file, void *priv,
struct v4l2_tuner *v)
{
if (v->index > 0)
return -EINVAL;
return 0;
}
static int vidioc_g_audio (struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index > 1)
return -EINVAL;
strcpy(a->name, "Radio");
a->capability = V4L2_AUDCAP_STEREO;
return 0;
}
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
{
*i = 0;
return 0;
}
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
{
if (i != 0)
return -EINVAL;
return 0;
}
static int vidioc_s_audio (struct file *file, void *priv,
struct v4l2_audio *a)
{
if (a->index != 0)
return -EINVAL;
return 0;
}
static int vidioc_s_frequency (struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct az_device *az = dev->priv;
az->curfreq = f->frequency;
az_setfreq(az, az->curfreq);
return 0;
}
static int vidioc_g_frequency (struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct video_device *dev = video_devdata(file);
struct az_device *az = dev->priv;
f->type = V4L2_TUNER_RADIO;
f->frequency = az->curfreq;
return 0;
}
static int vidioc_queryctrl (struct file *file, void *priv,
struct v4l2_queryctrl *qc)
{
int i;
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
if (qc->id && qc->id == radio_qctrl[i].id) {
memcpy(qc, &(radio_qctrl[i]),
sizeof(*qc));
return (0);
}
}
return -EINVAL;
}
static int vidioc_g_ctrl (struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct az_device *az = dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (az->curvol==0)
ctrl->value=1;
else
ctrl->value=0;
return (0);
case V4L2_CID_AUDIO_VOLUME:
ctrl->value=az->curvol * 6554;
return (0);
}
return -EINVAL;
}
static int vidioc_s_ctrl (struct file *file, void *priv,
struct v4l2_control *ctrl)
{
struct video_device *dev = video_devdata(file);
struct az_device *az = dev->priv;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
if (ctrl->value) {
az_setvol(az,0);
} else {
az_setvol(az,az->curvol);
}
return (0);
case V4L2_CID_AUDIO_VOLUME:
az_setvol(az,ctrl->value);
return (0);
}
return -EINVAL;
}
static struct az_device aztech_unit;
static const struct file_operations aztech_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = video_ioctl2,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device aztech_radio=
{
.owner = THIS_MODULE,
.name = "Aztech radio",
.type = VID_TYPE_TUNER,
.hardware = 0,
.fops = &aztech_fops,
.vidioc_querycap = vidioc_querycap,
.vidioc_g_tuner = vidioc_g_tuner,
.vidioc_s_tuner = vidioc_s_tuner,
.vidioc_g_audio = vidioc_g_audio,
.vidioc_s_audio = vidioc_s_audio,
.vidioc_g_input = vidioc_g_input,
.vidioc_s_input = vidioc_s_input,
.vidioc_g_frequency = vidioc_g_frequency,
.vidioc_s_frequency = vidioc_s_frequency,
.vidioc_queryctrl = vidioc_queryctrl,
.vidioc_g_ctrl = vidioc_g_ctrl,
.vidioc_s_ctrl = vidioc_s_ctrl,
};
module_param_named(debug,aztech_radio.debug, int, 0644);
MODULE_PARM_DESC(debug,"activates debug info");
static int __init aztech_init(void)
{
if(io==-1)
{
printk(KERN_ERR "You must set an I/O address with io=0x???\n");
return -EINVAL;
}
if (!request_region(io, 2, "aztech"))
{
printk(KERN_ERR "aztech: port 0x%x already in use\n", io);
return -EBUSY;
}
mutex_init(&lock);
aztech_radio.priv=&aztech_unit;
if(video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr)==-1)
{
release_region(io,2);
return -EINVAL;
}
printk(KERN_INFO "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
/* mute card - prevents noisy bootups */
outb (0, io);
return 0;
}
MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
MODULE_DESCRIPTION("A driver for the Aztech radio card.");
MODULE_LICENSE("GPL");
module_param(io, int, 0);
module_param(radio_nr, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");
static void __exit aztech_cleanup(void)
{
video_unregister_device(&aztech_radio);
release_region(io,2);
}
module_init(aztech_init);
module_exit(aztech_cleanup);
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