1 /* radio-aztech.c - Aztech radio card driver for Linux 2.2
3 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
4 * Adapted to support the Video for Linux API by
5 * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
9 * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
10 * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
11 * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
13 * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
14 * along with more information on the card itself.
17 * 1999-02-24 Russell Kroll <rkroll@exploits.org>
18 * Fine tuning/VIDEO_TUNER_LOW
19 * Range expanded to 87-108 MHz (from 87.9-107.8)
21 * Notable changes from the original source:
22 * - includes stripped down to the essentials
23 * - for loops used as delays replaced with udelay()
24 * - #defines removed, changed to static values
25 * - tuning structure changed - no more character arrays, other changes
28 #include <linux/module.h> /* Modules */
29 #include <linux/init.h> /* Initdata */
30 #include <linux/ioport.h> /* request_region */
31 #include <linux/delay.h> /* udelay */
32 #include <asm/io.h> /* outb, outb_p */
33 #include <asm/uaccess.h> /* copy to/from user */
34 #include <linux/videodev2.h> /* kernel radio structs */
35 #include <media/v4l2-common.h>
36 #include <media/v4l2-ioctl.h>
38 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
39 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
41 static struct v4l2_queryctrl radio_qctrl[] = {
43 .id = V4L2_CID_AUDIO_MUTE,
48 .type = V4L2_CTRL_TYPE_BOOLEAN,
50 .id = V4L2_CID_AUDIO_VOLUME,
55 .default_value = 0xff,
56 .type = V4L2_CTRL_TYPE_INTEGER,
60 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
62 #ifndef CONFIG_RADIO_AZTECH_PORT
63 #define CONFIG_RADIO_AZTECH_PORT -1
66 static int io = CONFIG_RADIO_AZTECH_PORT;
67 static int radio_nr = -1;
68 static int radio_wait_time = 1000;
69 static struct mutex lock;
75 unsigned long curfreq;
79 static int volconvert(int level)
81 level>>=14; /* Map 16bits down to 2 bit */
84 /* convert to card-friendly values */
96 return 0; /* Quieten gcc */
99 static void send_0_byte (struct az_device *dev)
101 udelay(radio_wait_time);
102 outb_p(2+volconvert(dev->curvol), io);
103 outb_p(64+2+volconvert(dev->curvol), io);
106 static void send_1_byte (struct az_device *dev)
108 udelay (radio_wait_time);
109 outb_p(128+2+volconvert(dev->curvol), io);
110 outb_p(128+64+2+volconvert(dev->curvol), io);
113 static int az_setvol(struct az_device *dev, int vol)
116 outb (volconvert(vol), io);
121 /* thanks to Michael Dwyer for giving me a dose of clues in
122 * the signal strength department..
124 * This card has a stereo bit - bit 0 set = mono, not set = stereo
125 * It also has a "signal" bit - bit 1 set = bad signal, not set = good
129 static int az_getsigstr(struct az_device *dev)
131 if (inb(io) & 2) /* bit set = no signal present */
133 return 1; /* signal present */
136 static int az_getstereo(struct az_device *dev)
138 if (inb(io) & 1) /* bit set = mono */
140 return 1; /* stereo */
143 static int az_setfreq(struct az_device *dev, unsigned long frequency)
147 frequency += 171200; /* Add 10.7 MHz IF */
148 frequency /= 800; /* Convert to 50 kHz units */
152 send_0_byte (dev); /* 0: LSB of frequency */
154 for (i = 0; i < 13; i++) /* : frequency bits (1-13) */
155 if (frequency & (1 << i))
160 send_0_byte (dev); /* 14: test bit - always 0 */
161 send_0_byte (dev); /* 15: test bit - always 0 */
162 send_0_byte (dev); /* 16: band data 0 - always 0 */
163 if (dev->stereo) /* 17: stereo (1 to enable) */
168 send_1_byte (dev); /* 18: band data 1 - unknown */
169 send_0_byte (dev); /* 19: time base - always 0 */
170 send_0_byte (dev); /* 20: spacing (0 = 25 kHz) */
171 send_1_byte (dev); /* 21: spacing (1 = 25 kHz) */
172 send_0_byte (dev); /* 22: spacing (0 = 25 kHz) */
173 send_1_byte (dev); /* 23: AM/FM (FM = 1, always) */
175 /* latch frequency */
177 udelay (radio_wait_time);
178 outb_p(128+64+volconvert(dev->curvol), io);
185 static int vidioc_querycap (struct file *file, void *priv,
186 struct v4l2_capability *v)
188 strlcpy(v->driver, "radio-aztech", sizeof (v->driver));
189 strlcpy(v->card, "Aztech Radio", sizeof (v->card));
190 sprintf(v->bus_info,"ISA");
191 v->version = RADIO_VERSION;
192 v->capabilities = V4L2_CAP_TUNER;
196 static int vidioc_g_tuner (struct file *file, void *priv,
197 struct v4l2_tuner *v)
199 struct az_device *az = video_drvdata(file);
204 strcpy(v->name, "FM");
205 v->type = V4L2_TUNER_RADIO;
207 v->rangelow=(87*16000);
208 v->rangehigh=(108*16000);
209 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
210 v->capability=V4L2_TUNER_CAP_LOW;
212 v->audmode = V4L2_TUNER_MODE_STEREO;
214 v->audmode = V4L2_TUNER_MODE_MONO;
215 v->signal=0xFFFF*az_getsigstr(az);
221 static int vidioc_s_tuner (struct file *file, void *priv,
222 struct v4l2_tuner *v)
230 static int vidioc_g_audio (struct file *file, void *priv,
231 struct v4l2_audio *a)
236 strcpy(a->name, "Radio");
237 a->capability = V4L2_AUDCAP_STEREO;
241 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
247 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
255 static int vidioc_s_audio (struct file *file, void *priv,
256 struct v4l2_audio *a)
264 static int vidioc_s_frequency (struct file *file, void *priv,
265 struct v4l2_frequency *f)
267 struct az_device *az = video_drvdata(file);
269 az->curfreq = f->frequency;
270 az_setfreq(az, az->curfreq);
274 static int vidioc_g_frequency (struct file *file, void *priv,
275 struct v4l2_frequency *f)
277 struct az_device *az = video_drvdata(file);
279 f->type = V4L2_TUNER_RADIO;
280 f->frequency = az->curfreq;
285 static int vidioc_queryctrl (struct file *file, void *priv,
286 struct v4l2_queryctrl *qc)
290 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
291 if (qc->id && qc->id == radio_qctrl[i].id) {
292 memcpy(qc, &(radio_qctrl[i]),
300 static int vidioc_g_ctrl (struct file *file, void *priv,
301 struct v4l2_control *ctrl)
303 struct az_device *az = video_drvdata(file);
306 case V4L2_CID_AUDIO_MUTE:
312 case V4L2_CID_AUDIO_VOLUME:
313 ctrl->value=az->curvol * 6554;
319 static int vidioc_s_ctrl (struct file *file, void *priv,
320 struct v4l2_control *ctrl)
322 struct az_device *az = video_drvdata(file);
325 case V4L2_CID_AUDIO_MUTE:
329 az_setvol(az,az->curvol);
332 case V4L2_CID_AUDIO_VOLUME:
333 az_setvol(az,ctrl->value);
339 static struct az_device aztech_unit;
341 static int aztech_exclusive_open(struct file *file)
343 return test_and_set_bit(0, &aztech_unit.in_use) ? -EBUSY : 0;
346 static int aztech_exclusive_release(struct file *file)
348 clear_bit(0, &aztech_unit.in_use);
352 static const struct v4l2_file_operations aztech_fops = {
353 .owner = THIS_MODULE,
354 .open = aztech_exclusive_open,
355 .release = aztech_exclusive_release,
356 .ioctl = video_ioctl2,
359 static const struct v4l2_ioctl_ops aztech_ioctl_ops = {
360 .vidioc_querycap = vidioc_querycap,
361 .vidioc_g_tuner = vidioc_g_tuner,
362 .vidioc_s_tuner = vidioc_s_tuner,
363 .vidioc_g_audio = vidioc_g_audio,
364 .vidioc_s_audio = vidioc_s_audio,
365 .vidioc_g_input = vidioc_g_input,
366 .vidioc_s_input = vidioc_s_input,
367 .vidioc_g_frequency = vidioc_g_frequency,
368 .vidioc_s_frequency = vidioc_s_frequency,
369 .vidioc_queryctrl = vidioc_queryctrl,
370 .vidioc_g_ctrl = vidioc_g_ctrl,
371 .vidioc_s_ctrl = vidioc_s_ctrl,
374 static struct video_device aztech_radio = {
375 .name = "Aztech radio",
376 .fops = &aztech_fops,
377 .ioctl_ops = &aztech_ioctl_ops,
378 .release = video_device_release_empty,
381 module_param_named(debug,aztech_radio.debug, int, 0644);
382 MODULE_PARM_DESC(debug,"activates debug info");
384 static int __init aztech_init(void)
388 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
392 if (!request_region(io, 2, "aztech"))
394 printk(KERN_ERR "aztech: port 0x%x already in use\n", io);
399 video_set_drvdata(&aztech_radio, &aztech_unit);
401 if (video_register_device(&aztech_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
402 release_region(io,2);
406 printk(KERN_INFO "Aztech radio card driver v1.00/19990224 rkroll@exploits.org\n");
407 /* mute card - prevents noisy bootups */
412 MODULE_AUTHOR("Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
413 MODULE_DESCRIPTION("A driver for the Aztech radio card.");
414 MODULE_LICENSE("GPL");
416 module_param(io, int, 0);
417 module_param(radio_nr, int, 0);
418 MODULE_PARM_DESC(io, "I/O address of the Aztech card (0x350 or 0x358)");
420 static void __exit aztech_cleanup(void)
422 video_unregister_device(&aztech_radio);
423 release_region(io,2);
426 module_init(aztech_init);
427 module_exit(aztech_cleanup);