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1 | /* Terratec ActiveRadio ISA Standalone card driver for Linux radio support | |
2 | * (c) 1999 R. Offermanns (rolf@offermanns.de) | |
3 | * based on the aimslab radio driver from M. Kirkwood | |
4 | * many thanks to Michael Becker and Friedhelm Birth (from TerraTec) | |
5 | * | |
6 | * | |
7 | * History: | |
8 | * 1999-05-21 First preview release | |
9 | * | |
10 | * Notes on the hardware: | |
11 | * There are two "main" chips on the card: | |
12 | * - Philips OM5610 (http://www-us.semiconductors.philips.com/acrobat/datasheets/OM5610_2.pdf) | |
13 | * - Philips SAA6588 (http://www-us.semiconductors.philips.com/acrobat/datasheets/SAA6588_1.pdf) | |
14 | * (you can get the datasheet at the above links) | |
15 | * | |
16 | * Frequency control is done digitally -- ie out(port,encodefreq(95.8)); | |
17 | * Volume Control is done digitally | |
18 | * | |
19 | * there is a I2C controlled RDS decoder (SAA6588) onboard, which i would like to support someday | |
20 | * (as soon i have understand how to get started :) | |
21 | * If you can help me out with that, please contact me!! | |
22 | * | |
23 | * | |
24 | * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org> | |
25 | */ | |
26 | ||
27 | #include <linux/module.h> /* Modules */ | |
28 | #include <linux/init.h> /* Initdata */ | |
29 | #include <linux/ioport.h> /* request_region */ | |
30 | #include <linux/delay.h> /* udelay */ | |
31 | #include <asm/io.h> /* outb, outb_p */ | |
32 | #include <asm/uaccess.h> /* copy to/from user */ | |
33 | #include <linux/videodev2.h> /* kernel radio structs */ | |
34 | #include <media/v4l2-common.h> | |
35 | #include <media/v4l2-ioctl.h> | |
36 | #include <linux/spinlock.h> | |
37 | ||
38 | #include <linux/version.h> /* for KERNEL_VERSION MACRO */ | |
39 | #define RADIO_VERSION KERNEL_VERSION(0,0,2) | |
40 | ||
41 | static struct v4l2_queryctrl radio_qctrl[] = { | |
42 | { | |
43 | .id = V4L2_CID_AUDIO_MUTE, | |
44 | .name = "Mute", | |
45 | .minimum = 0, | |
46 | .maximum = 1, | |
47 | .default_value = 1, | |
48 | .type = V4L2_CTRL_TYPE_BOOLEAN, | |
49 | },{ | |
50 | .id = V4L2_CID_AUDIO_VOLUME, | |
51 | .name = "Volume", | |
52 | .minimum = 0, | |
53 | .maximum = 0xff, | |
54 | .step = 1, | |
55 | .default_value = 0xff, | |
56 | .type = V4L2_CTRL_TYPE_INTEGER, | |
57 | } | |
58 | }; | |
59 | ||
60 | #ifndef CONFIG_RADIO_TERRATEC_PORT | |
61 | #define CONFIG_RADIO_TERRATEC_PORT 0x590 | |
62 | #endif | |
63 | ||
64 | /**************** this ones are for the terratec *******************/ | |
65 | #define BASEPORT 0x590 | |
66 | #define VOLPORT 0x591 | |
67 | #define WRT_DIS 0x00 | |
68 | #define CLK_OFF 0x00 | |
69 | #define IIC_DATA 0x01 | |
70 | #define IIC_CLK 0x02 | |
71 | #define DATA 0x04 | |
72 | #define CLK_ON 0x08 | |
73 | #define WRT_EN 0x10 | |
74 | /*******************************************************************/ | |
75 | ||
76 | static int io = CONFIG_RADIO_TERRATEC_PORT; | |
77 | static int radio_nr = -1; | |
78 | static spinlock_t lock; | |
79 | ||
80 | struct tt_device | |
81 | { | |
82 | unsigned long in_use; | |
83 | int port; | |
84 | int curvol; | |
85 | unsigned long curfreq; | |
86 | int muted; | |
87 | }; | |
88 | ||
89 | ||
90 | /* local things */ | |
91 | ||
92 | static void cardWriteVol(int volume) | |
93 | { | |
94 | int i; | |
95 | volume = volume+(volume * 32); // change both channels | |
96 | spin_lock(&lock); | |
97 | for (i=0;i<8;i++) | |
98 | { | |
99 | if (volume & (0x80>>i)) | |
100 | outb(0x80, VOLPORT); | |
101 | else outb(0x00, VOLPORT); | |
102 | } | |
103 | spin_unlock(&lock); | |
104 | } | |
105 | ||
106 | ||
107 | ||
108 | static void tt_mute(struct tt_device *dev) | |
109 | { | |
110 | dev->muted = 1; | |
111 | cardWriteVol(0); | |
112 | } | |
113 | ||
114 | static int tt_setvol(struct tt_device *dev, int vol) | |
115 | { | |
116 | ||
117 | // printk(KERN_ERR "setvol called, vol = %d\n", vol); | |
118 | ||
119 | if(vol == dev->curvol) { /* requested volume = current */ | |
120 | if (dev->muted) { /* user is unmuting the card */ | |
121 | dev->muted = 0; | |
122 | cardWriteVol(vol); /* enable card */ | |
123 | } | |
124 | ||
125 | return 0; | |
126 | } | |
127 | ||
128 | if(vol == 0) { /* volume = 0 means mute the card */ | |
129 | cardWriteVol(0); /* "turn off card" by setting vol to 0 */ | |
130 | dev->curvol = vol; /* track the volume state! */ | |
131 | return 0; | |
132 | } | |
133 | ||
134 | dev->muted = 0; | |
135 | ||
136 | cardWriteVol(vol); | |
137 | ||
138 | dev->curvol = vol; | |
139 | ||
140 | return 0; | |
141 | ||
142 | } | |
143 | ||
144 | ||
145 | /* this is the worst part in this driver */ | |
146 | /* many more or less strange things are going on here, but hey, it works :) */ | |
147 | ||
148 | static int tt_setfreq(struct tt_device *dev, unsigned long freq1) | |
149 | { | |
150 | int freq; | |
151 | int i; | |
152 | int p; | |
153 | int temp; | |
154 | long rest; | |
155 | ||
156 | unsigned char buffer[25]; /* we have to bit shift 25 registers */ | |
157 | freq = freq1/160; /* convert the freq. to a nice to handle value */ | |
158 | for(i=24;i>-1;i--) | |
159 | buffer[i]=0; | |
160 | ||
161 | rest = freq*10+10700; /* i once had understood what is going on here */ | |
162 | /* maybe some wise guy (friedhelm?) can comment this stuff */ | |
163 | i=13; | |
164 | p=10; | |
165 | temp=102400; | |
166 | while (rest!=0) | |
167 | { | |
168 | if (rest%temp == rest) | |
169 | buffer[i] = 0; | |
170 | else | |
171 | { | |
172 | buffer[i] = 1; | |
173 | rest = rest-temp; | |
174 | } | |
175 | i--; | |
176 | p--; | |
177 | temp = temp/2; | |
178 | } | |
179 | ||
180 | spin_lock(&lock); | |
181 | ||
182 | for (i=24;i>-1;i--) /* bit shift the values to the radiocard */ | |
183 | { | |
184 | if (buffer[i]==1) | |
185 | { | |
186 | outb(WRT_EN|DATA, BASEPORT); | |
187 | outb(WRT_EN|DATA|CLK_ON , BASEPORT); | |
188 | outb(WRT_EN|DATA, BASEPORT); | |
189 | } | |
190 | else | |
191 | { | |
192 | outb(WRT_EN|0x00, BASEPORT); | |
193 | outb(WRT_EN|0x00|CLK_ON , BASEPORT); | |
194 | } | |
195 | } | |
196 | outb(0x00, BASEPORT); | |
197 | ||
198 | spin_unlock(&lock); | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
203 | static int tt_getsigstr(struct tt_device *dev) /* TODO */ | |
204 | { | |
205 | if (inb(io) & 2) /* bit set = no signal present */ | |
206 | return 0; | |
207 | return 1; /* signal present */ | |
208 | } | |
209 | ||
210 | static int vidioc_querycap(struct file *file, void *priv, | |
211 | struct v4l2_capability *v) | |
212 | { | |
213 | strlcpy(v->driver, "radio-terratec", sizeof(v->driver)); | |
214 | strlcpy(v->card, "ActiveRadio", sizeof(v->card)); | |
215 | sprintf(v->bus_info, "ISA"); | |
216 | v->version = RADIO_VERSION; | |
217 | v->capabilities = V4L2_CAP_TUNER; | |
218 | return 0; | |
219 | } | |
220 | ||
221 | static int vidioc_g_tuner(struct file *file, void *priv, | |
222 | struct v4l2_tuner *v) | |
223 | { | |
224 | struct video_device *dev = video_devdata(file); | |
225 | struct tt_device *tt = dev->priv; | |
226 | ||
227 | if (v->index > 0) | |
228 | return -EINVAL; | |
229 | ||
230 | strcpy(v->name, "FM"); | |
231 | v->type = V4L2_TUNER_RADIO; | |
232 | v->rangelow = (87*16000); | |
233 | v->rangehigh = (108*16000); | |
234 | v->rxsubchans = V4L2_TUNER_SUB_MONO; | |
235 | v->capability = V4L2_TUNER_CAP_LOW; | |
236 | v->audmode = V4L2_TUNER_MODE_MONO; | |
237 | v->signal = 0xFFFF*tt_getsigstr(tt); | |
238 | return 0; | |
239 | } | |
240 | ||
241 | static int vidioc_s_tuner(struct file *file, void *priv, | |
242 | struct v4l2_tuner *v) | |
243 | { | |
244 | if (v->index > 0) | |
245 | return -EINVAL; | |
246 | return 0; | |
247 | } | |
248 | ||
249 | static int vidioc_s_frequency(struct file *file, void *priv, | |
250 | struct v4l2_frequency *f) | |
251 | { | |
252 | struct video_device *dev = video_devdata(file); | |
253 | struct tt_device *tt = dev->priv; | |
254 | ||
255 | tt->curfreq = f->frequency; | |
256 | tt_setfreq(tt, tt->curfreq); | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static int vidioc_g_frequency(struct file *file, void *priv, | |
261 | struct v4l2_frequency *f) | |
262 | { | |
263 | struct video_device *dev = video_devdata(file); | |
264 | struct tt_device *tt = dev->priv; | |
265 | ||
266 | f->type = V4L2_TUNER_RADIO; | |
267 | f->frequency = tt->curfreq; | |
268 | return 0; | |
269 | } | |
270 | ||
271 | static int vidioc_queryctrl(struct file *file, void *priv, | |
272 | struct v4l2_queryctrl *qc) | |
273 | { | |
274 | int i; | |
275 | ||
276 | for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) { | |
277 | if (qc->id && qc->id == radio_qctrl[i].id) { | |
278 | memcpy(qc, &(radio_qctrl[i]), | |
279 | sizeof(*qc)); | |
280 | return 0; | |
281 | } | |
282 | } | |
283 | return -EINVAL; | |
284 | } | |
285 | ||
286 | static int vidioc_g_ctrl(struct file *file, void *priv, | |
287 | struct v4l2_control *ctrl) | |
288 | { | |
289 | struct video_device *dev = video_devdata(file); | |
290 | struct tt_device *tt = dev->priv; | |
291 | ||
292 | switch (ctrl->id) { | |
293 | case V4L2_CID_AUDIO_MUTE: | |
294 | if (tt->muted) | |
295 | ctrl->value = 1; | |
296 | else | |
297 | ctrl->value = 0; | |
298 | return 0; | |
299 | case V4L2_CID_AUDIO_VOLUME: | |
300 | ctrl->value = tt->curvol * 6554; | |
301 | return 0; | |
302 | } | |
303 | return -EINVAL; | |
304 | } | |
305 | ||
306 | static int vidioc_s_ctrl(struct file *file, void *priv, | |
307 | struct v4l2_control *ctrl) | |
308 | { | |
309 | struct video_device *dev = video_devdata(file); | |
310 | struct tt_device *tt = dev->priv; | |
311 | ||
312 | switch (ctrl->id) { | |
313 | case V4L2_CID_AUDIO_MUTE: | |
314 | if (ctrl->value) | |
315 | tt_mute(tt); | |
316 | else | |
317 | tt_setvol(tt,tt->curvol); | |
318 | return 0; | |
319 | case V4L2_CID_AUDIO_VOLUME: | |
320 | tt_setvol(tt,ctrl->value); | |
321 | return 0; | |
322 | } | |
323 | return -EINVAL; | |
324 | } | |
325 | ||
326 | static int vidioc_g_audio(struct file *file, void *priv, | |
327 | struct v4l2_audio *a) | |
328 | { | |
329 | if (a->index > 1) | |
330 | return -EINVAL; | |
331 | ||
332 | strcpy(a->name, "Radio"); | |
333 | a->capability = V4L2_AUDCAP_STEREO; | |
334 | return 0; | |
335 | } | |
336 | ||
337 | static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i) | |
338 | { | |
339 | *i = 0; | |
340 | return 0; | |
341 | } | |
342 | ||
343 | static int vidioc_s_input(struct file *filp, void *priv, unsigned int i) | |
344 | { | |
345 | if (i != 0) | |
346 | return -EINVAL; | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int vidioc_s_audio(struct file *file, void *priv, | |
351 | struct v4l2_audio *a) | |
352 | { | |
353 | if (a->index != 0) | |
354 | return -EINVAL; | |
355 | return 0; | |
356 | } | |
357 | ||
358 | static struct tt_device terratec_unit; | |
359 | ||
360 | static int terratec_exclusive_open(struct inode *inode, struct file *file) | |
361 | { | |
362 | return test_and_set_bit(0, &terratec_unit.in_use) ? -EBUSY : 0; | |
363 | } | |
364 | ||
365 | static int terratec_exclusive_release(struct inode *inode, struct file *file) | |
366 | { | |
367 | clear_bit(0, &terratec_unit.in_use); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | static const struct file_operations terratec_fops = { | |
372 | .owner = THIS_MODULE, | |
373 | .open = terratec_exclusive_open, | |
374 | .release = terratec_exclusive_release, | |
375 | .ioctl = video_ioctl2, | |
376 | #ifdef CONFIG_COMPAT | |
377 | .compat_ioctl = v4l_compat_ioctl32, | |
378 | #endif | |
379 | .llseek = no_llseek, | |
380 | }; | |
381 | ||
382 | static const struct v4l2_ioctl_ops terratec_ioctl_ops = { | |
383 | .vidioc_querycap = vidioc_querycap, | |
384 | .vidioc_g_tuner = vidioc_g_tuner, | |
385 | .vidioc_s_tuner = vidioc_s_tuner, | |
386 | .vidioc_g_frequency = vidioc_g_frequency, | |
387 | .vidioc_s_frequency = vidioc_s_frequency, | |
388 | .vidioc_queryctrl = vidioc_queryctrl, | |
389 | .vidioc_g_ctrl = vidioc_g_ctrl, | |
390 | .vidioc_s_ctrl = vidioc_s_ctrl, | |
391 | .vidioc_g_audio = vidioc_g_audio, | |
392 | .vidioc_s_audio = vidioc_s_audio, | |
393 | .vidioc_g_input = vidioc_g_input, | |
394 | .vidioc_s_input = vidioc_s_input, | |
395 | }; | |
396 | ||
397 | static struct video_device terratec_radio = { | |
398 | .name = "TerraTec ActiveRadio", | |
399 | .fops = &terratec_fops, | |
400 | .ioctl_ops = &terratec_ioctl_ops, | |
401 | }; | |
402 | ||
403 | static int __init terratec_init(void) | |
404 | { | |
405 | if(io==-1) | |
406 | { | |
407 | printk(KERN_ERR "You must set an I/O address with io=0x???\n"); | |
408 | return -EINVAL; | |
409 | } | |
410 | if (!request_region(io, 2, "terratec")) | |
411 | { | |
412 | printk(KERN_ERR "TerraTec: port 0x%x already in use\n", io); | |
413 | return -EBUSY; | |
414 | } | |
415 | ||
416 | terratec_radio.priv=&terratec_unit; | |
417 | ||
418 | spin_lock_init(&lock); | |
419 | ||
420 | if (video_register_device(&terratec_radio, VFL_TYPE_RADIO, radio_nr) < 0) { | |
421 | release_region(io,2); | |
422 | return -EINVAL; | |
423 | } | |
424 | ||
425 | printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver.\n"); | |
426 | ||
427 | /* mute card - prevents noisy bootups */ | |
428 | ||
429 | /* this ensures that the volume is all the way down */ | |
430 | cardWriteVol(0); | |
431 | terratec_unit.curvol = 0; | |
432 | ||
433 | return 0; | |
434 | } | |
435 | ||
436 | MODULE_AUTHOR("R.OFFERMANNS & others"); | |
437 | MODULE_DESCRIPTION("A driver for the TerraTec ActiveRadio Standalone radio card."); | |
438 | MODULE_LICENSE("GPL"); | |
439 | module_param(io, int, 0); | |
440 | MODULE_PARM_DESC(io, "I/O address of the TerraTec ActiveRadio card (0x590 or 0x591)"); | |
441 | module_param(radio_nr, int, 0); | |
442 | ||
443 | static void __exit terratec_cleanup_module(void) | |
444 | { | |
445 | video_unregister_device(&terratec_radio); | |
446 | release_region(io,2); | |
447 | printk(KERN_INFO "TERRATEC ActivRadio Standalone card driver unloaded.\n"); | |
448 | } | |
449 | ||
450 | module_init(terratec_init); | |
451 | module_exit(terratec_cleanup_module); | |
452 |