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.semiconductors.philips.com/pip/TEA5757H/V1
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 <asm/io.h>
41 #include <asm/uaccess.h>
42 #include <linux/mutex.h>
43
44 #include <linux/pci.h>
45 #include <linux/videodev2.h>
46 #include <media/v4l2-common.h>
47
48 #define DRIVER_VERSION "0.77"
49
50 #include <linux/version.h> /* for KERNEL_VERSION MACRO */
51 #define RADIO_VERSION KERNEL_VERSION(0,7,7)
52
53 static struct video_device maxiradio_radio;
54
55 #define dprintk(num, fmt, arg...) \
56 do { \
57 if (maxiradio_radio.debug >= num) \
58 printk(KERN_DEBUG "%s: " fmt, \
59 maxiradio_radio.name, ## arg); } while (0)
60
61 static struct v4l2_queryctrl radio_qctrl[] = {
62 {
63 .id = V4L2_CID_AUDIO_MUTE,
64 .name = "Mute",
65 .minimum = 0,
66 .maximum = 1,
67 .default_value = 1,
68 .type = V4L2_CTRL_TYPE_BOOLEAN,
69 }
70 };
71
72 #ifndef PCI_VENDOR_ID_GUILLEMOT
73 #define PCI_VENDOR_ID_GUILLEMOT 0x5046
74 #endif
75
76 #ifndef PCI_DEVICE_ID_GUILLEMOT
77 #define PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO 0x1001
78 #endif
79
80
81 /* TEA5757 pin mappings */
82 static const int clk = 1, data = 2, wren = 4, mo_st = 8, power = 16 ;
83
84 static int radio_nr = -1;
85 module_param(radio_nr, int, 0);
86
87
88 #define FREQ_LO 50*16000
89 #define FREQ_HI 150*16000
90
91 #define FREQ_IF 171200 /* 10.7*16000 */
92 #define FREQ_STEP 200 /* 12.5*16 */
93
94 /* (x==fmhz*16*1000) -> bits */
95 #define FREQ2BITS(x) ((( (unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1)) \
96 /(FREQ_STEP<<2))<<2)
97
98 #define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
99
100
101 static const struct file_operations maxiradio_fops = {
102 .owner = THIS_MODULE,
103 .open = video_exclusive_open,
104 .release = video_exclusive_release,
105 .ioctl = video_ioctl2,
106 .compat_ioctl = v4l_compat_ioctl32,
107 .llseek = no_llseek,
108 };
109
110 static struct radio_device
111 {
112 __u16 io, /* base of radio io */
113 muted, /* VIDEO_AUDIO_MUTE */
114 stereo, /* VIDEO_TUNER_STEREO_ON */
115 tuned; /* signal strength (0 or 0xffff) */
116
117 unsigned long freq;
118
119 struct mutex lock;
120 } radio_unit = {
121 .muted =1,
122 .freq = FREQ_LO,
123 };
124
125 static void outbit(unsigned long bit, __u16 io)
126 {
127 if (bit != 0)
128 {
129 outb( power|wren|data ,io); udelay(4);
130 outb( power|wren|data|clk ,io); udelay(4);
131 outb( power|wren|data ,io); udelay(4);
132 }
133 else
134 {
135 outb( power|wren ,io); udelay(4);
136 outb( power|wren|clk ,io); udelay(4);
137 outb( power|wren ,io); udelay(4);
138 }
139 }
140
141 static void turn_power(__u16 io, int p)
142 {
143 if (p != 0) {
144 dprintk(1, "Radio powered on\n");
145 outb(power, io);
146 } else {
147 dprintk(1, "Radio powered off\n");
148 outb(0,io);
149 }
150 }
151
152 static void set_freq(__u16 io, __u32 freq)
153 {
154 unsigned long int si;
155 int bl;
156 int data = FREQ2BITS(freq);
157
158 /* TEA5757 shift register bits (see pdf) */
159
160 outbit(0,io); // 24 search
161 outbit(1,io); // 23 search up/down
162
163 outbit(0,io); // 22 stereo/mono
164
165 outbit(0,io); // 21 band
166 outbit(0,io); // 20 band (only 00=FM works I think)
167
168 outbit(0,io); // 19 port ?
169 outbit(0,io); // 18 port ?
170
171 outbit(0,io); // 17 search level
172 outbit(0,io); // 16 search level
173
174 si = 0x8000;
175 for (bl = 1; bl <= 16 ; bl++) {
176 outbit(data & si,io);
177 si >>=1;
178 }
179
180 dprintk(1, "Radio freq set to %d.%02d MHz\n",
181 freq / 16000,
182 freq % 16000 * 100 / 16000);
183
184 turn_power(io, 1);
185 }
186
187 static int get_stereo(__u16 io)
188 {
189 outb(power,io);
190 udelay(4);
191
192 return !(inb(io) & mo_st);
193 }
194
195 static int get_tune(__u16 io)
196 {
197 outb(power+clk,io);
198 udelay(4);
199
200 return !(inb(io) & mo_st);
201 }
202
203
204 static int vidioc_querycap (struct file *file, void *priv,
205 struct v4l2_capability *v)
206 {
207 strlcpy(v->driver, "radio-maxiradio", sizeof (v->driver));
208 strlcpy(v->card, "Maxi Radio FM2000 radio", sizeof (v->card));
209 sprintf(v->bus_info,"ISA");
210 v->version = RADIO_VERSION;
211 v->capabilities = V4L2_CAP_TUNER;
212
213 return 0;
214 }
215
216 static int vidioc_g_tuner (struct file *file, void *priv,
217 struct v4l2_tuner *v)
218 {
219 struct video_device *dev = video_devdata(file);
220 struct radio_device *card=dev->priv;
221
222 if (v->index > 0)
223 return -EINVAL;
224
225 memset(v,0,sizeof(*v));
226 strcpy(v->name, "FM");
227 v->type = V4L2_TUNER_RADIO;
228
229 v->rangelow=FREQ_LO;
230 v->rangehigh=FREQ_HI;
231 v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
232 v->capability=V4L2_TUNER_CAP_LOW;
233 if(get_stereo(card->io))
234 v->audmode = V4L2_TUNER_MODE_STEREO;
235 else
236 v->audmode = V4L2_TUNER_MODE_MONO;
237 v->signal=0xffff*get_tune(card->io);
238
239 return 0;
240 }
241
242 static int vidioc_s_tuner (struct file *file, void *priv,
243 struct v4l2_tuner *v)
244 {
245 if (v->index > 0)
246 return -EINVAL;
247
248 return 0;
249 }
250
251 static int vidioc_g_audio (struct file *file, void *priv,
252 struct v4l2_audio *a)
253 {
254 if (a->index > 1)
255 return -EINVAL;
256
257 strcpy(a->name, "FM");
258 a->capability = V4L2_AUDCAP_STEREO;
259 return 0;
260 }
261
262 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
263 {
264 *i = 0;
265
266 return 0;
267 }
268
269 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
270 {
271 if (i != 0)
272 return -EINVAL;
273
274 return 0;
275 }
276
277
278 static int vidioc_s_audio (struct file *file, void *priv,
279 struct v4l2_audio *a)
280 {
281 if (a->index != 0)
282 return -EINVAL;
283
284 return 0;
285 }
286
287 static int vidioc_s_frequency (struct file *file, void *priv,
288 struct v4l2_frequency *f)
289 {
290 struct video_device *dev = video_devdata(file);
291 struct radio_device *card=dev->priv;
292
293 if (f->frequency < FREQ_LO || f->frequency > FREQ_HI) {
294 dprintk(1, "radio freq (%d.%02d MHz) out of range (%d-%d)\n",
295 f->frequency / 16000,
296 f->frequency % 16000 * 100 / 16000,
297 FREQ_LO / 16000, FREQ_HI / 16000);
298
299 return -EINVAL;
300 }
301
302 card->freq = f->frequency;
303 set_freq(card->io, card->freq);
304 msleep(125);
305
306 return 0;
307 }
308
309 static int vidioc_g_frequency (struct file *file, void *priv,
310 struct v4l2_frequency *f)
311 {
312 struct video_device *dev = video_devdata(file);
313 struct radio_device *card=dev->priv;
314
315 f->type = V4L2_TUNER_RADIO;
316 f->frequency = card->freq;
317
318 dprintk(4, "radio freq is %d.%02d MHz",
319 f->frequency / 16000,
320 f->frequency % 16000 * 100 / 16000);
321
322 return 0;
323 }
324
325 static int vidioc_queryctrl (struct file *file, void *priv,
326 struct v4l2_queryctrl *qc)
327 {
328 int i;
329
330 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
331 if (qc->id && qc->id == radio_qctrl[i].id) {
332 memcpy(qc, &(radio_qctrl[i]), sizeof(*qc));
333 return (0);
334 }
335 }
336
337 return -EINVAL;
338 }
339
340 static int vidioc_g_ctrl (struct file *file, void *priv,
341 struct v4l2_control *ctrl)
342 {
343 struct video_device *dev = video_devdata(file);
344 struct radio_device *card=dev->priv;
345
346 switch (ctrl->id) {
347 case V4L2_CID_AUDIO_MUTE:
348 ctrl->value=card->muted;
349 return (0);
350 }
351
352 return -EINVAL;
353 }
354
355 static int vidioc_s_ctrl (struct file *file, void *priv,
356 struct v4l2_control *ctrl)
357 {
358 struct video_device *dev = video_devdata(file);
359 struct radio_device *card=dev->priv;
360
361 switch (ctrl->id) {
362 case V4L2_CID_AUDIO_MUTE:
363 card->muted = ctrl->value;
364 if(card->muted)
365 turn_power(card->io, 0);
366 else
367 set_freq(card->io, card->freq);
368 return 0;
369 }
370
371 return -EINVAL;
372 }
373
374 static struct video_device maxiradio_radio =
375 {
376 .owner = THIS_MODULE,
377 .name = "Maxi Radio FM2000 radio",
378 .type = VID_TYPE_TUNER,
379 .fops = &maxiradio_fops,
380
381 .vidioc_querycap = vidioc_querycap,
382 .vidioc_g_tuner = vidioc_g_tuner,
383 .vidioc_s_tuner = vidioc_s_tuner,
384 .vidioc_g_audio = vidioc_g_audio,
385 .vidioc_s_audio = vidioc_s_audio,
386 .vidioc_g_input = vidioc_g_input,
387 .vidioc_s_input = vidioc_s_input,
388 .vidioc_g_frequency = vidioc_g_frequency,
389 .vidioc_s_frequency = vidioc_s_frequency,
390 .vidioc_queryctrl = vidioc_queryctrl,
391 .vidioc_g_ctrl = vidioc_g_ctrl,
392 .vidioc_s_ctrl = vidioc_s_ctrl,
393 };
394
395 static int __devinit maxiradio_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
396 {
397 if(!request_region(pci_resource_start(pdev, 0),
398 pci_resource_len(pdev, 0), "Maxi Radio FM 2000")) {
399 printk(KERN_ERR "radio-maxiradio: can't reserve I/O ports\n");
400 goto err_out;
401 }
402
403 if (pci_enable_device(pdev))
404 goto err_out_free_region;
405
406 radio_unit.io = pci_resource_start(pdev, 0);
407 mutex_init(&radio_unit.lock);
408 maxiradio_radio.priv = &radio_unit;
409
410 if (video_register_device(&maxiradio_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
411 printk("radio-maxiradio: can't register device!");
412 goto err_out_free_region;
413 }
414
415 printk(KERN_INFO "radio-maxiradio: version "
416 DRIVER_VERSION
417 " time "
418 __TIME__ " "
419 __DATE__
420 "\n");
421
422 printk(KERN_INFO "radio-maxiradio: found Guillemot MAXI Radio device (io = 0x%x)\n",
423 radio_unit.io);
424 return 0;
425
426 err_out_free_region:
427 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
428 err_out:
429 return -ENODEV;
430 }
431
432 static void __devexit maxiradio_remove_one(struct pci_dev *pdev)
433 {
434 video_unregister_device(&maxiradio_radio);
435 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
436 }
437
438 static struct pci_device_id maxiradio_pci_tbl[] = {
439 { PCI_VENDOR_ID_GUILLEMOT, PCI_DEVICE_ID_GUILLEMOT_MAXIRADIO,
440 PCI_ANY_ID, PCI_ANY_ID, },
441 { 0,}
442 };
443
444 MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
445
446 static struct pci_driver maxiradio_driver = {
447 .name = "radio-maxiradio",
448 .id_table = maxiradio_pci_tbl,
449 .probe = maxiradio_init_one,
450 .remove = __devexit_p(maxiradio_remove_one),
451 };
452
453 static int __init maxiradio_radio_init(void)
454 {
455 return pci_register_driver(&maxiradio_driver);
456 }
457
458 static void __exit maxiradio_radio_exit(void)
459 {
460 pci_unregister_driver(&maxiradio_driver);
461 }
462
463 module_init(maxiradio_radio_init);
464 module_exit(maxiradio_radio_exit);
465
466 MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
467 MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
468 MODULE_LICENSE("GPL");
469
470 module_param_named(debug,maxiradio_radio.debug, int, 0644);
471 MODULE_PARM_DESC(debug,"activates debug info");
472
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