?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
FRV: Use generic show_interrupts()
[cris-mirror.git] / drivers / media / radio / radio-maxiradio.c
blob5c2a9058c09fd6966d4c47c8c44b8fd681e8d9a6
1 /*
2 * Guillemot Maxi Radio FM 2000 PCI radio card driver for Linux
3 * (C) 2001 Dimitromanolakis Apostolos <apdim@grecian.net>
4 *
5 * Based in the radio Maestro PCI driver. Actually it uses the same chip
6 * for radio but different pci controller.
7 *
8 * I didn't have any specs I reversed engineered the protocol from
9 * the windows driver (radio.dll).
10 *
11 * The card uses the TEA5757 chip that includes a search function but it
12 * is useless as I haven't found any way to read back the frequency. If
13 * anybody does please mail me.
14 *
15 * For the pdf file see:
16 * http://www.nxp.com/acrobat_download2/expired_datasheets/TEA5757_5759_3.pdf
17 *
18 *
19 * CHANGES:
20 * 0.75b
21 * - better pci interface thanks to Francois Romieu <romieu@cogenit.fr>
22 *
23 * 0.75 Sun Feb 4 22:51:27 EET 2001
24 * - tiding up
25 * - removed support for multiple devices as it didn't work anyway
26 *
27 * BUGS:
28 * - card unmutes if you change frequency
29 *
30 * (c) 2006, 2007 by Mauro Carvalho Chehab <mchehab@infradead.org>:
31 * - Conversion to V4L2 API
32 * - Uses video_ioctl2 for parsing and to add debug support
33 */
34
35
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/ioport.h>
39 #include <linux/delay.h>
40 #include <linux/mutex.h>
41 #include <linux/pci.h>
42 #include <linux/videodev2.h>
43 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
44 #include <linux/io.h>
45 #include <linux/slab.h>
46 #include <media/v4l2-device.h>
47 #include <media/v4l2-ioctl.h>
48
49 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
50 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
51 MODULE_LICENSE("GPL");
52
53 static int radio_nr = -1;
54 module_param(radio_nr, int, 0);
55
56 static int debug;
57
58 module_param(debug, int, 0644);
59 MODULE_PARM_DESC(debug, "activates debug info");
60
61 #define DRIVER_VERSION "0.77"
62
63 #define RADIO_VERSION KERNEL_VERSION(0, 7, 7)
64
65 #define dprintk(dev, num, fmt, arg...) \
66 v4l2_dbg(num, debug, &dev->v4l2_dev, fmt, ## arg)
67
68 #ifndef PCI_VENDOR_ID_GUILLEMOT
69 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
70 #endif
71
72 #ifndef PCI_DEVICE_ID_GUILLEMOT
73 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
74 #endif
75
76
77 /* TEA5757 pin mappings */
78 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16;
79
80 #define FREQ_LO (87 * 16000)
81 #define FREQ_HI (108 * 16000)
82
83 #define FREQ_IF 171200 /* 10.7*16000 */
84 #define FREQ_STEP 200 /* 12.5*16 */
85
86 /* (x==fmhz*16*1000) -> bits */
87 #define FREQ2BITS(x) \
88 ((((unsigned int)(x) + FREQ_IF + (FREQ_STEP << 1)) / (FREQ_STEP << 2)) << 2)
89
90 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
91
92
93 struct maxiradio
94 {
95 struct v4l2_device v4l2_dev;
96 struct video_device vdev;
97 struct pci_dev *pdev;
98
99 u16 io; /* base of radio io */
100 u16 muted; /* VIDEO_AUDIO_MUTE */
101 u16 stereo; /* VIDEO_TUNER_STEREO_ON */
102 u16 tuned; /* signal strength (0 or 0xffff) */
103
104 unsigned long freq;
105
106 struct mutex lock;
107 };
108
109 static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
110 {
111 return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
112 }
113
114 static void outbit(unsigned long bit, u16 io)
115 {
116 int val = power | wren | (bit ? data : 0);
117
118 outb(val, io);
119 udelay(4);
120 outb(val | clk, io);
121 udelay(4);
122 outb(val, io);
123 udelay(4);
124 }
125
126 static void turn_power(struct maxiradio *dev, int p)
127 {
128 if (p != 0) {
129 dprintk(dev, 1, "Radio powered on\n");
130 outb(power, dev->io);
131 } else {
132 dprintk(dev, 1, "Radio powered off\n");
133 outb(0, dev->io);
134 }
135 }
136
137 static void set_freq(struct maxiradio *dev, u32 freq)
138 {
139 unsigned long int si;
140 int bl;
141 int io = dev->io;
142 int val = FREQ2BITS(freq);
143
144 /* TEA5757 shift register bits (see pdf) */
145
146 outbit(0, io); /* 24 search */
147 outbit(1, io); /* 23 search up/down */
148
149 outbit(0, io); /* 22 stereo/mono */
150
151 outbit(0, io); /* 21 band */
152 outbit(0, io); /* 20 band (only 00=FM works I think) */
153
154 outbit(0, io); /* 19 port ? */
155 outbit(0, io); /* 18 port ? */
156
157 outbit(0, io); /* 17 search level */
158 outbit(0, io); /* 16 search level */
159
160 si = 0x8000;
161 for (bl = 1; bl <= 16; bl++) {
162 outbit(val & si, io);
163 si >>= 1;
164 }
165
166 dprintk(dev, 1, "Radio freq set to %d.%02d MHz\n",
167 freq / 16000,
168 freq % 16000 * 100 / 16000);
169
170 turn_power(dev, 1);
171 }
172
173 static int get_stereo(u16 io)
174 {
175 outb(power,io);
176 udelay(4);
177
178 return !(inb(io) & mo_st);
179 }
180
181 static int get_tune(u16 io)
182 {
183 outb(power+clk,io);
184 udelay(4);
185
186 return !(inb(io) & mo_st);
187 }
188
189
190 static int vidioc_querycap(struct file *file, void *priv,
191 struct v4l2_capability *v)
192 {
193 struct maxiradio *dev = video_drvdata(file);
194
195 strlcpy(v->driver, "radio-maxiradio", sizeof(v->driver));
196 strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof(v->card));
197 snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(dev->pdev));
198 v->version = RADIO_VERSION;
199 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
200 return 0;
201 }
202
203 static int vidioc_g_tuner(struct file *file, void *priv,
204 struct v4l2_tuner *v)
205 {
206 struct maxiradio *dev = video_drvdata(file);
207
208 if (v->index > 0)
209 return -EINVAL;
210
211 mutex_lock(&dev->lock);
212 strlcpy(v->name, "FM", sizeof(v->name));
213 v->type = V4L2_TUNER_RADIO;
214 v->rangelow = FREQ_LO;
215 v->rangehigh = FREQ_HI;
216 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
217 v->capability = V4L2_TUNER_CAP_LOW;
218 if (get_stereo(dev->io))
219 v->audmode = V4L2_TUNER_MODE_STEREO;
220 else
221 v->audmode = V4L2_TUNER_MODE_MONO;
222 v->signal = 0xffff * get_tune(dev->io);
223 mutex_unlock(&dev->lock);
224
225 return 0;
226 }
227
228 static int vidioc_s_tuner(struct file *file, void *priv,
229 struct v4l2_tuner *v)
230 {
231 return v->index ? -EINVAL : 0;
232 }
233
234 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
235 {
236 *i = 0;
237 return 0;
238 }
239
240 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
241 {
242 return i ? -EINVAL : 0;
243 }
244
245 static int vidioc_g_audio(struct file *file, void *priv,
246 struct v4l2_audio *a)
247 {
248 a->index = 0;
249 strlcpy(a->name, "Radio", sizeof(a->name));
250 a->capability = V4L2_AUDCAP_STEREO;
251 return 0;
252 }
253
254
255 static int vidioc_s_audio(struct file *file, void *priv,
256 struct v4l2_audio *a)
257 {
258 return a->index ? -EINVAL : 0;
259 }
260
261 static int vidioc_s_frequency(struct file *file, void *priv,
262 struct v4l2_frequency *f)
263 {
264 struct maxiradio *dev = video_drvdata(file);
265
266 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
267 return -EINVAL;
268 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
269 dprintk(dev, 1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
270 f->frequency / 16000,
271 f->frequency % 16000 * 100 / 16000,
272 FREQ_LO / 16000, FREQ_HI / 16000);
273
274 return -EINVAL;
275 }
276
277 mutex_lock(&dev->lock);
278 dev->freq = f->frequency;
279 set_freq(dev, dev->freq);
280 msleep(125);
281 mutex_unlock(&dev->lock);
282
283 return 0;
284 }
285
286 static int vidioc_g_frequency(struct file *file, void *priv,
287 struct v4l2_frequency *f)
288 {
289 struct maxiradio *dev = video_drvdata(file);
290
291 if (f->tuner != 0)
292 return -EINVAL;
293 f->type = V4L2_TUNER_RADIO;
294 f->frequency = dev->freq;
295
296 dprintk(dev, 4, "radio freq is %d.%02d MHz",
297 f->frequency / 16000,
298 f->frequency % 16000 * 100 / 16000);
299
300 return 0;
301 }
302
303 static int vidioc_queryctrl(struct file *file, void *priv,
304 struct v4l2_queryctrl *qc)
305 {
306 switch (qc->id) {
307 case V4L2_CID_AUDIO_MUTE:
308 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
309 }
310 return -EINVAL;
311 }
312
313 static int vidioc_g_ctrl(struct file *file, void *priv,
314 struct v4l2_control *ctrl)
315 {
316 struct maxiradio *dev = video_drvdata(file);
317
318 switch (ctrl->id) {
319 case V4L2_CID_AUDIO_MUTE:
320 ctrl->value = dev->muted;
321 return 0;
322 }
323
324 return -EINVAL;
325 }
326
327 static int vidioc_s_ctrl(struct file *file, void *priv,
328 struct v4l2_control *ctrl)
329 {
330 struct maxiradio *dev = video_drvdata(file);
331
332 switch (ctrl->id) {
333 case V4L2_CID_AUDIO_MUTE:
334 mutex_lock(&dev->lock);
335 dev->muted = ctrl->value;
336 if (dev->muted)
337 turn_power(dev, 0);
338 else
339 set_freq(dev, dev->freq);
340 mutex_unlock(&dev->lock);
341 return 0;
342 }
343
344 return -EINVAL;
345 }
346
347 static const struct v4l2_file_operations maxiradio_fops = {
348 .owner = THIS_MODULE,
349 .unlocked_ioctl = video_ioctl2,
350 };
351
352 static const struct v4l2_ioctl_ops maxiradio_ioctl_ops = {
353 .vidioc_querycap = vidioc_querycap,
354 .vidioc_g_tuner = vidioc_g_tuner,
355 .vidioc_s_tuner = vidioc_s_tuner,
356 .vidioc_g_audio = vidioc_g_audio,
357 .vidioc_s_audio = vidioc_s_audio,
358 .vidioc_g_input = vidioc_g_input,
359 .vidioc_s_input = vidioc_s_input,
360 .vidioc_g_frequency = vidioc_g_frequency,
361 .vidioc_s_frequency = vidioc_s_frequency,
362 .vidioc_queryctrl = vidioc_queryctrl,
363 .vidioc_g_ctrl = vidioc_g_ctrl,
364 .vidioc_s_ctrl = vidioc_s_ctrl,
365 };
366
367 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
368 {
369 struct maxiradio *dev;
370 struct v4l2_device *v4l2_dev;
371 int retval = -ENOMEM;
372
373 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
374 if (dev == NULL) {
375 dev_err(&pdev->dev, "not enough memory\n");
376 return -ENOMEM;
377 }
378
379 v4l2_dev = &dev->v4l2_dev;
380 mutex_init(&dev->lock);
381 dev->pdev = pdev;
382 dev->muted = 1;
383 dev->freq = FREQ_LO;
384
385 strlcpy(v4l2_dev->name, "maxiradio", sizeof(v4l2_dev->name));
386
387 retval = v4l2_device_register(&pdev->dev, v4l2_dev);
388 if (retval < 0) {
389 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
390 goto errfr;
391 }
392
393 if (!request_region(pci_resource_start(pdev, 0),
394 pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
395 v4l2_err(v4l2_dev, "can't reserve I/O ports\n");
396 goto err_out;
397 }
398
399 if (pci_enable_device(pdev))
400 goto err_out_free_region;
401
402 dev->io = pci_resource_start(pdev, 0);
403 strlcpy(dev->vdev.name, v4l2_dev->name, sizeof(dev->vdev.name));
404 dev->vdev.v4l2_dev = v4l2_dev;
405 dev->vdev.fops = &maxiradio_fops;
406 dev->vdev.ioctl_ops = &maxiradio_ioctl_ops;
407 dev->vdev.release = video_device_release_empty;
408 video_set_drvdata(&dev->vdev, dev);
409
410 if (video_register_device(&dev->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
411 v4l2_err(v4l2_dev, "can't register device!");
412 goto err_out_free_region;
413 }
414
415 v4l2_info(v4l2_dev, "version " DRIVER_VERSION
416 " time " __TIME__ " " __DATE__ "\n");
417
418 v4l2_info(v4l2_dev, "found Guillemot MAXI Radio device (io = 0x%x)\n",
419 dev->io);
420 return 0;
421
422 err_out_free_region:
423 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
424 err_out:
425 v4l2_device_unregister(v4l2_dev);
426 errfr:
427 kfree(dev);
428 return -ENODEV;
429 }
430
431 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
432 {
433 struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
434 struct maxiradio *dev = to_maxiradio(v4l2_dev);
435
436 video_unregister_device(&dev->vdev);
437 v4l2_device_unregister(&dev->v4l2_dev);
438 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
439 }
440
441 static struct pci_device_id maxiradio_pci_tbl[] = {
442 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
443 PCI_ANY_ID, PCI_ANY_ID, },
444 { 0 }
445 };
446
447 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
448
449 static struct pci_driver maxiradio_driver = {
450 .name = "radio-maxiradio",
451 .id_table = maxiradio_pci_tbl,
452 .probe = maxiradio_init_one,
453 .remove = __devexit_p(maxiradio_remove_one),
454 };
455
456 static int __init maxiradio_radio_init(void)
457 {
458 return pci_register_driver(&maxiradio_driver);
459 }
460
461 static void __exit maxiradio_radio_exit(void)
462 {
463 pci_unregister_driver(&maxiradio_driver);
464 }
465
466 module_init(maxiradio_radio_init);
467 module_exit(maxiradio_radio_exit);
CRIS linux kernel tree