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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>
44#include <linux/io.h>
45#include <linux/slab.h>
46#include <media/v4l2-device.h>
47#include <media/v4l2-ioctl.h>
48
49MODULE_AUTHOR("Dimitromanolakis Apostolos, apdim@grecian.net");
50MODULE_DESCRIPTION("Radio driver for the Guillemot Maxi Radio FM2000 radio.");
51MODULE_LICENSE("GPL");
52
53static int radio_nr = -1;
54module_param(radio_nr, int, 0);
55
56static int debug;
57
58module_param(debug, int, 0644);
59MODULE_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
78static 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
84#define FREQ_STEP 200
85
86
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
93struct maxiradio
94{
95 struct v4l2_device v4l2_dev;
96 struct video_device vdev;
97 struct pci_dev *pdev;
98
99 u16 io;
100 u16 muted;
101 u16 stereo;
102 u16 tuned;
103
104 unsigned long freq;
105
106 struct mutex lock;
107};
108
109static inline struct maxiradio *to_maxiradio(struct v4l2_device *v4l2_dev)
110{
111 return container_of(v4l2_dev, struct maxiradio, v4l2_dev);
112}
113
114static 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
126static 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
137static 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
145
146 outbit(0, io);
147 outbit(1, io);
148
149 outbit(0, io);
150
151 outbit(0, io);
152 outbit(0, io);
153
154 outbit(0, io);
155 outbit(0, io);
156
157 outbit(0, io);
158 outbit(0, io);
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
173static int get_stereo(u16 io)
174{
175 outb(power,io);
176 udelay(4);
177
178 return !(inb(io) & mo_st);
179}
180
181static int get_tune(u16 io)
182{
183 outb(power+clk,io);
184 udelay(4);
185
186 return !(inb(io) & mo_st);
187}
188
189
190static 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
203static 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
228static int vidioc_s_tuner(struct file *file, void *priv,
229 struct v4l2_tuner *v)
230{
231 return v->index ? -EINVAL : 0;
232}
233
234static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
235{
236 *i = 0;
237 return 0;
238}
239
240static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
241{
242 return i ? -EINVAL : 0;
243}
244
245static 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
255static int vidioc_s_audio(struct file *file, void *priv,
256 struct v4l2_audio *a)
257{
258 return a->index ? -EINVAL : 0;
259}
260
261static 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
286static 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
303static 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
313static 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
327static 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
347static const struct v4l2_file_operations maxiradio_fops = {
348 .owner = THIS_MODULE,
349 .unlocked_ioctl = video_ioctl2,
350};
351
352static 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
367static 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
422err_out_free_region:
423 release_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
424err_out:
425 v4l2_device_unregister(v4l2_dev);
426errfr:
427 kfree(dev);
428 return -ENODEV;
429}
430
431static 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
441static 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
447MODULE_DEVICE_TABLE(pci, maxiradio_pci_tbl);
448
449static 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
456static int __init maxiradio_radio_init(void)
457{
458 return pci_register_driver(&maxiradio_driver);
459}
460
461static void __exit maxiradio_radio_exit(void)
462{
463 pci_unregister_driver(&maxiradio_driver);
464}
465
466module_init(maxiradio_radio_init);
467module_exit(maxiradio_radio_exit);
468
