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27#include <linux/module.h>
28#include <linux/init.h>
29#include <linux/ioport.h>
30#include <linux/videodev2.h>
31#include <linux/mutex.h>
32#include <linux/version.h>
33#include <linux/io.h>
34#include <media/v4l2-device.h>
35#include <media/v4l2-ioctl.h>
36
37MODULE_AUTHOR("R.OFFERMANNS & others");
38MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card.");
39MODULE_LICENSE("GPL");
40
41#ifndef CONFIG_RADIO_TERRATEC_PORT
42#define CONFIG_RADIO_TERRATEC_PORT 0x590
43#endif
44
45static int io = CONFIG_RADIO_TERRATEC_PORT;
46static int radio_nr = -1;
47
48module_param(io, int, 0);
49MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)");
50module_param(radio_nr, int, 0);
51
52#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
53
54static struct v4l2_queryctrl radio_qctrl[] = {
55 {
56 .id = V4L2_CID_AUDIO_MUTE,
57 .name = "Mute",
58 .minimum = 0,
59 .maximum = 1,
60 .default_value = 1,
61 .type = V4L2_CTRL_TYPE_BOOLEAN,
62 },{
63 .id = V4L2_CID_AUDIO_VOLUME,
64 .name = "Volume",
65 .minimum = 0,
66 .maximum = 0xff,
67 .step = 1,
68 .default_value = 0xff,
69 .type = V4L2_CTRL_TYPE_INTEGER,
70 }
71};
72
73#define WRT_DIS 0x00
74#define CLK_OFF 0x00
75#define IIC_DATA 0x01
76#define IIC_CLK 0x02
77#define DATA 0x04
78#define CLK_ON 0x08
79#define WRT_EN 0x10
80
81struct terratec
82{
83 struct v4l2_device v4l2_dev;
84 struct video_device vdev;
85 int io;
86 int curvol;
87 unsigned long curfreq;
88 int muted;
89 struct mutex lock;
90};
91
92static struct terratec terratec_card;
93
94
95
96static void tt_write_vol(struct terratec *tt, int volume)
97{
98 int i;
99
100 volume = volume + (volume * 32);
101 mutex_lock(&tt->lock);
102 for (i = 0; i < 8; i++) {
103 if (volume & (0x80 >> i))
104 outb(0x80, tt->io + 1);
105 else
106 outb(0x00, tt->io + 1);
107 }
108 mutex_unlock(&tt->lock);
109}
110
111
112
113static void tt_mute(struct terratec *tt)
114{
115 tt->muted = 1;
116 tt_write_vol(tt, 0);
117}
118
119static int tt_setvol(struct terratec *tt, int vol)
120{
121 if (vol == tt->curvol) {
122 if (tt->muted) {
123 tt->muted = 0;
124 tt_write_vol(tt, vol);
125 }
126 return 0;
127 }
128
129 if (vol == 0) {
130 tt_write_vol(tt, 0);
131 tt->curvol = vol;
132 return 0;
133 }
134
135 tt->muted = 0;
136 tt_write_vol(tt, vol);
137 tt->curvol = vol;
138 return 0;
139}
140
141
142
143
144
145static int tt_setfreq(struct terratec *tt, unsigned long freq1)
146{
147 int freq;
148 int i;
149 int p;
150 int temp;
151 long rest;
152 unsigned char buffer[25];
153
154 mutex_lock(&tt->lock);
155
156 tt->curfreq = freq1;
157
158 freq = freq1 / 160;
159 memset(buffer, 0, sizeof(buffer));
160
161 rest = freq * 10 + 10700;
162
163 i = 13;
164 p = 10;
165 temp = 102400;
166 while (rest != 0) {
167 if (rest % temp == rest)
168 buffer[i] = 0;
169 else {
170 buffer[i] = 1;
171 rest = rest - temp;
172 }
173 i--;
174 p--;
175 temp = temp / 2;
176 }
177
178 for (i = 24; i > -1; i--) {
179 if (buffer[i] == 1) {
180 outb(WRT_EN | DATA, tt->io);
181 outb(WRT_EN | DATA | CLK_ON, tt->io);
182 outb(WRT_EN | DATA, tt->io);
183 } else {
184 outb(WRT_EN | 0x00, tt->io);
185 outb(WRT_EN | 0x00 | CLK_ON, tt->io);
186 }
187 }
188 outb(0x00, tt->io);
189
190 mutex_unlock(&tt->lock);
191
192 return 0;
193}
194
195static int tt_getsigstr(struct terratec *tt)
196{
197 if (inb(tt->io) & 2)
198 return 0;
199 return 1;
200}
201
202static int vidioc_querycap(struct file *file, void *priv,
203 struct v4l2_capability *v)
204{
205 strlcpy(v->driver, "radio-terratec", sizeof(v->driver));
206 strlcpy(v->card, "ActiveRadio", sizeof(v->card));
207 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
208 v->version = RADIO_VERSION;
209 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
210 return 0;
211}
212
213static int vidioc_g_tuner(struct file *file, void *priv,
214 struct v4l2_tuner *v)
215{
216 struct terratec *tt = video_drvdata(file);
217
218 if (v->index > 0)
219 return -EINVAL;
220
221 strlcpy(v->name, "FM", sizeof(v->name));
222 v->type = V4L2_TUNER_RADIO;
223 v->rangelow = 87 * 16000;
224 v->rangehigh = 108 * 16000;
225 v->rxsubchans = V4L2_TUNER_SUB_MONO;
226 v->capability = V4L2_TUNER_CAP_LOW;
227 v->audmode = V4L2_TUNER_MODE_MONO;
228 v->signal = 0xFFFF * tt_getsigstr(tt);
229 return 0;
230}
231
232static int vidioc_s_tuner(struct file *file, void *priv,
233 struct v4l2_tuner *v)
234{
235 return v->index ? -EINVAL : 0;
236}
237
238static int vidioc_s_frequency(struct file *file, void *priv,
239 struct v4l2_frequency *f)
240{
241 struct terratec *tt = video_drvdata(file);
242
243 tt_setfreq(tt, f->frequency);
244 return 0;
245}
246
247static int vidioc_g_frequency(struct file *file, void *priv,
248 struct v4l2_frequency *f)
249{
250 struct terratec *tt = video_drvdata(file);
251
252 f->type = V4L2_TUNER_RADIO;
253 f->frequency = tt->curfreq;
254 return 0;
255}
256
257static int vidioc_queryctrl(struct file *file, void *priv,
258 struct v4l2_queryctrl *qc)
259{
260 int i;
261
262 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
263 if (qc->id && qc->id == radio_qctrl[i].id) {
264 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
265 return 0;
266 }
267 }
268 return -EINVAL;
269}
270
271static int vidioc_g_ctrl(struct file *file, void *priv,
272 struct v4l2_control *ctrl)
273{
274 struct terratec *tt = video_drvdata(file);
275
276 switch (ctrl->id) {
277 case V4L2_CID_AUDIO_MUTE:
278 if (tt->muted)
279 ctrl->value = 1;
280 else
281 ctrl->value = 0;
282 return 0;
283 case V4L2_CID_AUDIO_VOLUME:
284 ctrl->value = tt->curvol * 6554;
285 return 0;
286 }
287 return -EINVAL;
288}
289
290static int vidioc_s_ctrl(struct file *file, void *priv,
291 struct v4l2_control *ctrl)
292{
293 struct terratec *tt = video_drvdata(file);
294
295 switch (ctrl->id) {
296 case V4L2_CID_AUDIO_MUTE:
297 if (ctrl->value)
298 tt_mute(tt);
299 else
300 tt_setvol(tt,tt->curvol);
301 return 0;
302 case V4L2_CID_AUDIO_VOLUME:
303 tt_setvol(tt,ctrl->value);
304 return 0;
305 }
306 return -EINVAL;
307}
308
309static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
310{
311 *i = 0;
312 return 0;
313}
314
315static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
316{
317 return i ? -EINVAL : 0;
318}
319
320static int vidioc_g_audio(struct file *file, void *priv,
321 struct v4l2_audio *a)
322{
323 a->index = 0;
324 strlcpy(a->name, "Radio", sizeof(a->name));
325 a->capability = V4L2_AUDCAP_STEREO;
326 return 0;
327}
328
329static int vidioc_s_audio(struct file *file, void *priv,
330 struct v4l2_audio *a)
331{
332 return a->index ? -EINVAL : 0;
333}
334
335static const struct v4l2_file_operations terratec_fops = {
336 .owner = THIS_MODULE,
337 .ioctl = video_ioctl2,
338};
339
340static const struct v4l2_ioctl_ops terratec_ioctl_ops = {
341 .vidioc_querycap = vidioc_querycap,
342 .vidioc_g_tuner = vidioc_g_tuner,
343 .vidioc_s_tuner = vidioc_s_tuner,
344 .vidioc_g_frequency = vidioc_g_frequency,
345 .vidioc_s_frequency = vidioc_s_frequency,
346 .vidioc_queryctrl = vidioc_queryctrl,
347 .vidioc_g_ctrl = vidioc_g_ctrl,
348 .vidioc_s_ctrl = vidioc_s_ctrl,
349 .vidioc_g_audio = vidioc_g_audio,
350 .vidioc_s_audio = vidioc_s_audio,
351 .vidioc_g_input = vidioc_g_input,
352 .vidioc_s_input = vidioc_s_input,
353};
354
355static int __init terratec_init(void)
356{
357 struct terratec *tt = &terratec_card;
358 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
359 int res;
360
361 strlcpy(v4l2_dev->name, "terratec", sizeof(v4l2_dev->name));
362 tt->io = io;
363 if (tt->io == -1) {
364 v4l2_err(v4l2_dev, "you must set an I/O address with io=0x590 or 0x591\n");
365 return -EINVAL;
366 }
367 if (!request_region(tt->io, 2, "terratec")) {
368 v4l2_err(v4l2_dev, "port 0x%x already in use\n", io);
369 return -EBUSY;
370 }
371
372 res = v4l2_device_register(NULL, v4l2_dev);
373 if (res < 0) {
374 release_region(tt->io, 2);
375 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
376 return res;
377 }
378
379 strlcpy(tt->vdev.name, v4l2_dev->name, sizeof(tt->vdev.name));
380 tt->vdev.v4l2_dev = v4l2_dev;
381 tt->vdev.fops = &terratec_fops;
382 tt->vdev.ioctl_ops = &terratec_ioctl_ops;
383 tt->vdev.release = video_device_release_empty;
384 video_set_drvdata(&tt->vdev, tt);
385
386 mutex_init(&tt->lock);
387
388 if (video_register_device(&tt->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
389 v4l2_device_unregister(&tt->v4l2_dev);
390 release_region(tt->io, 2);
391 return -EINVAL;
392 }
393
394 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver.\n");
395
396
397 tt_write_vol(tt, 0);
398 return 0;
399}
400
401static void __exit terratec_exit(void)
402{
403 struct terratec *tt = &terratec_card;
404 struct v4l2_device *v4l2_dev = &tt->v4l2_dev;
405
406 video_unregister_device(&tt->vdev);
407 v4l2_device_unregister(&tt->v4l2_dev);
408 release_region(tt->io, 2);
409 v4l2_info(v4l2_dev, "TERRATEC ActivRadio Standalone card driver unloaded.\n");
410}
411
412module_init(terratec_init);
413module_exit(terratec_exit);
414
415
