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42#include <linux/types.h>
43#include <linux/list.h>
44#include <linux/module.h>
45#include <linux/init.h>
46#include <linux/pci.h>
47#include <linux/videodev2.h>
48#include <linux/errno.h>
49#include <linux/version.h>
50#include <linux/io.h>
51#include <linux/slab.h>
52#include <media/v4l2-device.h>
53#include <media/v4l2-ioctl.h>
54
55MODULE_AUTHOR("Vladimir Shebordaev <vshebordaev@mail.ru>");
56MODULE_DESCRIPTION("The video4linux driver for the Gemtek PCI Radio Card");
57MODULE_LICENSE("GPL");
58
59static int nr_radio = -1;
60static int mx = 1;
61
62module_param(mx, bool, 0);
63MODULE_PARM_DESC(mx, "single digit: 1 - turn off the turner upon module exit (default), 0 - do not");
64module_param(nr_radio, int, 0);
65MODULE_PARM_DESC(nr_radio, "video4linux device number to use");
66
67#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
68
69#ifndef PCI_VENDOR_ID_GEMTEK
70#define PCI_VENDOR_ID_GEMTEK 0x5046
71#endif
72
73#ifndef PCI_DEVICE_ID_GEMTEK_PR103
74#define PCI_DEVICE_ID_GEMTEK_PR103 0x1001
75#endif
76
77#ifndef GEMTEK_PCI_RANGE_LOW
78#define GEMTEK_PCI_RANGE_LOW (87*16000)
79#endif
80
81#ifndef GEMTEK_PCI_RANGE_HIGH
82#define GEMTEK_PCI_RANGE_HIGH (108*16000)
83#endif
84
85struct gemtek_pci {
86 struct v4l2_device v4l2_dev;
87 struct video_device vdev;
88 struct mutex lock;
89 struct pci_dev *pdev;
90
91 u32 iobase;
92 u32 length;
93
94 u32 current_frequency;
95 u8 mute;
96};
97
98static inline struct gemtek_pci *to_gemtek_pci(struct v4l2_device *v4l2_dev)
99{
100 return container_of(v4l2_dev, struct gemtek_pci, v4l2_dev);
101}
102
103static inline u8 gemtek_pci_out(u16 value, u32 port)
104{
105 outw(value, port);
106
107 return (u8)value;
108}
109
110#define _b0(v) (*((u8 *)&v))
111
112static void __gemtek_pci_cmd(u16 value, u32 port, u8 *last_byte, int keep)
113{
114 u8 byte = *last_byte;
115
116 if (!value) {
117 if (!keep)
118 value = (u16)port;
119 byte &= 0xfd;
120 } else
121 byte |= 2;
122
123 _b0(value) = byte;
124 outw(value, port);
125 byte |= 1;
126 _b0(value) = byte;
127 outw(value, port);
128 byte &= 0xfe;
129 _b0(value) = byte;
130 outw(value, port);
131
132 *last_byte = byte;
133}
134
135static inline void gemtek_pci_nil(u32 port, u8 *last_byte)
136{
137 __gemtek_pci_cmd(0x00, port, last_byte, false);
138}
139
140static inline void gemtek_pci_cmd(u16 cmd, u32 port, u8 *last_byte)
141{
142 __gemtek_pci_cmd(cmd, port, last_byte, true);
143}
144
145static void gemtek_pci_setfrequency(struct gemtek_pci *card, unsigned long frequency)
146{
147 int i;
148 u32 value = frequency / 200 + 856;
149 u16 mask = 0x8000;
150 u8 last_byte;
151 u32 port = card->iobase;
152
153 mutex_lock(&card->lock);
154 card->current_frequency = frequency;
155 last_byte = gemtek_pci_out(0x06, port);
156
157 i = 0;
158 do {
159 gemtek_pci_nil(port, &last_byte);
160 i++;
161 } while (i < 9);
162
163 i = 0;
164 do {
165 gemtek_pci_cmd(value & mask, port, &last_byte);
166 mask >>= 1;
167 i++;
168 } while (i < 16);
169
170 outw(0x10, port);
171 mutex_unlock(&card->lock);
172}
173
174
175static void gemtek_pci_mute(struct gemtek_pci *card)
176{
177 mutex_lock(&card->lock);
178 outb(0x1f, card->iobase);
179 card->mute = true;
180 mutex_unlock(&card->lock);
181}
182
183static void gemtek_pci_unmute(struct gemtek_pci *card)
184{
185 if (card->mute) {
186 gemtek_pci_setfrequency(card, card->current_frequency);
187 card->mute = false;
188 }
189}
190
191static int gemtek_pci_getsignal(struct gemtek_pci *card)
192{
193 int sig;
194
195 mutex_lock(&card->lock);
196 sig = (inb(card->iobase) & 0x08) ? 0 : 1;
197 mutex_unlock(&card->lock);
198 return sig;
199}
200
201static int vidioc_querycap(struct file *file, void *priv,
202 struct v4l2_capability *v)
203{
204 struct gemtek_pci *card = video_drvdata(file);
205
206 strlcpy(v->driver, "radio-gemtek-pci", sizeof(v->driver));
207 strlcpy(v->card, "GemTek PCI Radio", sizeof(v->card));
208 snprintf(v->bus_info, sizeof(v->bus_info), "PCI:%s", pci_name(card->pdev));
209 v->version = RADIO_VERSION;
210 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
211 return 0;
212}
213
214static int vidioc_g_tuner(struct file *file, void *priv,
215 struct v4l2_tuner *v)
216{
217 struct gemtek_pci *card = video_drvdata(file);
218
219 if (v->index > 0)
220 return -EINVAL;
221
222 strlcpy(v->name, "FM", sizeof(v->name));
223 v->type = V4L2_TUNER_RADIO;
224 v->rangelow = GEMTEK_PCI_RANGE_LOW;
225 v->rangehigh = GEMTEK_PCI_RANGE_HIGH;
226 v->rxsubchans = V4L2_TUNER_SUB_MONO;
227 v->capability = V4L2_TUNER_CAP_LOW;
228 v->audmode = V4L2_TUNER_MODE_MONO;
229 v->signal = 0xffff * gemtek_pci_getsignal(card);
230 return 0;
231}
232
233static int vidioc_s_tuner(struct file *file, void *priv,
234 struct v4l2_tuner *v)
235{
236 return v->index ? -EINVAL : 0;
237}
238
239static int vidioc_s_frequency(struct file *file, void *priv,
240 struct v4l2_frequency *f)
241{
242 struct gemtek_pci *card = video_drvdata(file);
243
244 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
245 return -EINVAL;
246 if (f->frequency < GEMTEK_PCI_RANGE_LOW ||
247 f->frequency > GEMTEK_PCI_RANGE_HIGH)
248 return -EINVAL;
249 gemtek_pci_setfrequency(card, f->frequency);
250 card->mute = false;
251 return 0;
252}
253
254static int vidioc_g_frequency(struct file *file, void *priv,
255 struct v4l2_frequency *f)
256{
257 struct gemtek_pci *card = video_drvdata(file);
258
259 if (f->tuner != 0)
260 return -EINVAL;
261 f->type = V4L2_TUNER_RADIO;
262 f->frequency = card->current_frequency;
263 return 0;
264}
265
266static int vidioc_queryctrl(struct file *file, void *priv,
267 struct v4l2_queryctrl *qc)
268{
269 switch (qc->id) {
270 case V4L2_CID_AUDIO_MUTE:
271 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
272 case V4L2_CID_AUDIO_VOLUME:
273 return v4l2_ctrl_query_fill(qc, 0, 65535, 65535, 65535);
274 }
275 return -EINVAL;
276}
277
278static int vidioc_g_ctrl(struct file *file, void *priv,
279 struct v4l2_control *ctrl)
280{
281 struct gemtek_pci *card = video_drvdata(file);
282
283 switch (ctrl->id) {
284 case V4L2_CID_AUDIO_MUTE:
285 ctrl->value = card->mute;
286 return 0;
287 case V4L2_CID_AUDIO_VOLUME:
288 if (card->mute)
289 ctrl->value = 0;
290 else
291 ctrl->value = 65535;
292 return 0;
293 }
294 return -EINVAL;
295}
296
297static int vidioc_s_ctrl(struct file *file, void *priv,
298 struct v4l2_control *ctrl)
299{
300 struct gemtek_pci *card = video_drvdata(file);
301
302 switch (ctrl->id) {
303 case V4L2_CID_AUDIO_MUTE:
304 if (ctrl->value)
305 gemtek_pci_mute(card);
306 else
307 gemtek_pci_unmute(card);
308 return 0;
309 case V4L2_CID_AUDIO_VOLUME:
310 if (ctrl->value)
311 gemtek_pci_unmute(card);
312 else
313 gemtek_pci_mute(card);
314 return 0;
315 }
316 return -EINVAL;
317}
318
319static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
320{
321 *i = 0;
322 return 0;
323}
324
325static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
326{
327 return i ? -EINVAL : 0;
328}
329
330static int vidioc_g_audio(struct file *file, void *priv,
331 struct v4l2_audio *a)
332{
333 a->index = 0;
334 strlcpy(a->name, "Radio", sizeof(a->name));
335 a->capability = V4L2_AUDCAP_STEREO;
336 return 0;
337}
338
339static int vidioc_s_audio(struct file *file, void *priv,
340 struct v4l2_audio *a)
341{
342 return a->index ? -EINVAL : 0;
343}
344
345enum {
346 GEMTEK_PR103
347};
348
349static char *card_names[] __devinitdata = {
350 "GEMTEK_PR103"
351};
352
353static struct pci_device_id gemtek_pci_id[] =
354{
355 { PCI_VENDOR_ID_GEMTEK, PCI_DEVICE_ID_GEMTEK_PR103,
356 PCI_ANY_ID, PCI_ANY_ID, 0, 0, GEMTEK_PR103 },
357 { 0 }
358};
359
360MODULE_DEVICE_TABLE(pci, gemtek_pci_id);
361
362static const struct v4l2_file_operations gemtek_pci_fops = {
363 .owner = THIS_MODULE,
364 .ioctl = video_ioctl2,
365};
366
367static const struct v4l2_ioctl_ops gemtek_pci_ioctl_ops = {
368 .vidioc_querycap = vidioc_querycap,
369 .vidioc_g_tuner = vidioc_g_tuner,
370 .vidioc_s_tuner = vidioc_s_tuner,
371 .vidioc_g_audio = vidioc_g_audio,
372 .vidioc_s_audio = vidioc_s_audio,
373 .vidioc_g_input = vidioc_g_input,
374 .vidioc_s_input = vidioc_s_input,
375 .vidioc_g_frequency = vidioc_g_frequency,
376 .vidioc_s_frequency = vidioc_s_frequency,
377 .vidioc_queryctrl = vidioc_queryctrl,
378 .vidioc_g_ctrl = vidioc_g_ctrl,
379 .vidioc_s_ctrl = vidioc_s_ctrl,
380};
381
382static int __devinit gemtek_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pci_id)
383{
384 struct gemtek_pci *card;
385 struct v4l2_device *v4l2_dev;
386 int res;
387
388 card = kzalloc(sizeof(struct gemtek_pci), GFP_KERNEL);
389 if (card == NULL) {
390 dev_err(&pdev->dev, "out of memory\n");
391 return -ENOMEM;
392 }
393
394 v4l2_dev = &card->v4l2_dev;
395 mutex_init(&card->lock);
396 card->pdev = pdev;
397
398 strlcpy(v4l2_dev->name, "gemtek_pci", sizeof(v4l2_dev->name));
399
400 res = v4l2_device_register(&pdev->dev, v4l2_dev);
401 if (res < 0) {
402 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
403 kfree(card);
404 return res;
405 }
406
407 if (pci_enable_device(pdev))
408 goto err_pci;
409
410 card->iobase = pci_resource_start(pdev, 0);
411 card->length = pci_resource_len(pdev, 0);
412
413 if (request_region(card->iobase, card->length, card_names[pci_id->driver_data]) == NULL) {
414 v4l2_err(v4l2_dev, "i/o port already in use\n");
415 goto err_pci;
416 }
417
418 strlcpy(card->vdev.name, v4l2_dev->name, sizeof(card->vdev.name));
419 card->vdev.v4l2_dev = v4l2_dev;
420 card->vdev.fops = &gemtek_pci_fops;
421 card->vdev.ioctl_ops = &gemtek_pci_ioctl_ops;
422 card->vdev.release = video_device_release_empty;
423 video_set_drvdata(&card->vdev, card);
424
425 if (video_register_device(&card->vdev, VFL_TYPE_RADIO, nr_radio) < 0)
426 goto err_video;
427
428 gemtek_pci_mute(card);
429
430 v4l2_info(v4l2_dev, "Gemtek PCI Radio (rev. %d) found at 0x%04x-0x%04x.\n",
431 pdev->revision, card->iobase, card->iobase + card->length - 1);
432
433 return 0;
434
435err_video:
436 release_region(card->iobase, card->length);
437
438err_pci:
439 v4l2_device_unregister(v4l2_dev);
440 kfree(card);
441 return -ENODEV;
442}
443
444static void __devexit gemtek_pci_remove(struct pci_dev *pdev)
445{
446 struct v4l2_device *v4l2_dev = dev_get_drvdata(&pdev->dev);
447 struct gemtek_pci *card = to_gemtek_pci(v4l2_dev);
448
449 video_unregister_device(&card->vdev);
450 v4l2_device_unregister(v4l2_dev);
451
452 release_region(card->iobase, card->length);
453
454 if (mx)
455 gemtek_pci_mute(card);
456
457 kfree(card);
458}
459
460static struct pci_driver gemtek_pci_driver = {
461 .name = "gemtek_pci",
462 .id_table = gemtek_pci_id,
463 .probe = gemtek_pci_probe,
464 .remove = __devexit_p(gemtek_pci_remove),
465};
466
467static int __init gemtek_pci_init(void)
468{
469 return pci_register_driver(&gemtek_pci_driver);
470}
471
472static void __exit gemtek_pci_exit(void)
473{
474 pci_unregister_driver(&gemtek_pci_driver);
475}
476
477module_init(gemtek_pci_init);
478module_exit(gemtek_pci_exit);
479
