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19#include <linux/version.h>
20#include <linux/kernel.h>
21#include <linux/module.h>
22#include <linux/init.h>
23#include <linux/ioport.h>
24#include <linux/delay.h>
25#include <linux/isapnp.h>
26#include <linux/mutex.h>
27#include <linux/videodev2.h>
28#include <linux/io.h>
29#include <media/v4l2-device.h>
30#include <media/v4l2-ioctl.h>
31
32MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
33MODULE_DESCRIPTION("A driver for the SF16-FMI and SF16-FMP radio.");
34MODULE_LICENSE("GPL");
35
36static int io = -1;
37static int radio_nr = -1;
38
39module_param(io, int, 0);
40MODULE_PARM_DESC(io, "I/O address of the SF16-FMI or SF16-FMP card (0x284 or 0x384)");
41module_param(radio_nr, int, 0);
42
43#define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
44
45struct fmi
46{
47 struct v4l2_device v4l2_dev;
48 struct video_device vdev;
49 int io;
50 bool mute;
51 unsigned long curfreq;
52 struct mutex lock;
53};
54
55static struct fmi fmi_card;
56static struct pnp_dev *dev;
57bool pnp_attached;
58
59
60
61
62
63
64#define RSF16_ENCODE(x) ((x) / 800 + 214)
65#define RSF16_MINFREQ (87 * 16000)
66#define RSF16_MAXFREQ (108 * 16000)
67
68static void outbits(int bits, unsigned int data, int io)
69{
70 while (bits--) {
71 if (data & 1) {
72 outb(5, io);
73 udelay(6);
74 outb(7, io);
75 udelay(6);
76 } else {
77 outb(1, io);
78 udelay(6);
79 outb(3, io);
80 udelay(6);
81 }
82 data >>= 1;
83 }
84}
85
86static inline void fmi_mute(struct fmi *fmi)
87{
88 mutex_lock(&fmi->lock);
89 outb(0x00, fmi->io);
90 mutex_unlock(&fmi->lock);
91}
92
93static inline void fmi_unmute(struct fmi *fmi)
94{
95 mutex_lock(&fmi->lock);
96 outb(0x08, fmi->io);
97 mutex_unlock(&fmi->lock);
98}
99
100static inline int fmi_setfreq(struct fmi *fmi, unsigned long freq)
101{
102 mutex_lock(&fmi->lock);
103 fmi->curfreq = freq;
104
105 outbits(16, RSF16_ENCODE(freq), fmi->io);
106 outbits(8, 0xC0, fmi->io);
107 msleep(143);
108 mutex_unlock(&fmi->lock);
109 if (!fmi->mute)
110 fmi_unmute(fmi);
111 return 0;
112}
113
114static inline int fmi_getsigstr(struct fmi *fmi)
115{
116 int val;
117 int res;
118
119 mutex_lock(&fmi->lock);
120 val = fmi->mute ? 0x00 : 0x08;
121 outb(val, fmi->io);
122 outb(val | 0x10, fmi->io);
123 msleep(143);
124 res = (int)inb(fmi->io + 1);
125 outb(val, fmi->io);
126
127 mutex_unlock(&fmi->lock);
128 return (res & 2) ? 0 : 0xFFFF;
129}
130
131static int vidioc_querycap(struct file *file, void *priv,
132 struct v4l2_capability *v)
133{
134 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
135 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
136 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
137 v->version = RADIO_VERSION;
138 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
139 return 0;
140}
141
142static int vidioc_g_tuner(struct file *file, void *priv,
143 struct v4l2_tuner *v)
144{
145 struct fmi *fmi = video_drvdata(file);
146
147 if (v->index > 0)
148 return -EINVAL;
149
150 strlcpy(v->name, "FM", sizeof(v->name));
151 v->type = V4L2_TUNER_RADIO;
152 v->rangelow = RSF16_MINFREQ;
153 v->rangehigh = RSF16_MAXFREQ;
154 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
155 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
156 v->audmode = V4L2_TUNER_MODE_STEREO;
157 v->signal = fmi_getsigstr(fmi);
158 return 0;
159}
160
161static int vidioc_s_tuner(struct file *file, void *priv,
162 struct v4l2_tuner *v)
163{
164 return v->index ? -EINVAL : 0;
165}
166
167static int vidioc_s_frequency(struct file *file, void *priv,
168 struct v4l2_frequency *f)
169{
170 struct fmi *fmi = video_drvdata(file);
171
172 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
173 return -EINVAL;
174 if (f->frequency < RSF16_MINFREQ ||
175 f->frequency > RSF16_MAXFREQ)
176 return -EINVAL;
177
178
179 fmi_setfreq(fmi, (f->frequency / 800) * 800);
180 return 0;
181}
182
183static int vidioc_g_frequency(struct file *file, void *priv,
184 struct v4l2_frequency *f)
185{
186 struct fmi *fmi = video_drvdata(file);
187
188 if (f->tuner != 0)
189 return -EINVAL;
190 f->type = V4L2_TUNER_RADIO;
191 f->frequency = fmi->curfreq;
192 return 0;
193}
194
195static int vidioc_queryctrl(struct file *file, void *priv,
196 struct v4l2_queryctrl *qc)
197{
198 switch (qc->id) {
199 case V4L2_CID_AUDIO_MUTE:
200 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
201 }
202 return -EINVAL;
203}
204
205static int vidioc_g_ctrl(struct file *file, void *priv,
206 struct v4l2_control *ctrl)
207{
208 struct fmi *fmi = video_drvdata(file);
209
210 switch (ctrl->id) {
211 case V4L2_CID_AUDIO_MUTE:
212 ctrl->value = fmi->mute;
213 return 0;
214 }
215 return -EINVAL;
216}
217
218static int vidioc_s_ctrl(struct file *file, void *priv,
219 struct v4l2_control *ctrl)
220{
221 struct fmi *fmi = video_drvdata(file);
222
223 switch (ctrl->id) {
224 case V4L2_CID_AUDIO_MUTE:
225 if (ctrl->value)
226 fmi_mute(fmi);
227 else
228 fmi_unmute(fmi);
229 fmi->mute = ctrl->value;
230 return 0;
231 }
232 return -EINVAL;
233}
234
235static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
236{
237 *i = 0;
238 return 0;
239}
240
241static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
242{
243 return i ? -EINVAL : 0;
244}
245
246static int vidioc_g_audio(struct file *file, void *priv,
247 struct v4l2_audio *a)
248{
249 a->index = 0;
250 strlcpy(a->name, "Radio", sizeof(a->name));
251 a->capability = V4L2_AUDCAP_STEREO;
252 return 0;
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 const struct v4l2_file_operations fmi_fops = {
262 .owner = THIS_MODULE,
263 .ioctl = video_ioctl2,
264};
265
266static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
267 .vidioc_querycap = vidioc_querycap,
268 .vidioc_g_tuner = vidioc_g_tuner,
269 .vidioc_s_tuner = vidioc_s_tuner,
270 .vidioc_g_audio = vidioc_g_audio,
271 .vidioc_s_audio = vidioc_s_audio,
272 .vidioc_g_input = vidioc_g_input,
273 .vidioc_s_input = vidioc_s_input,
274 .vidioc_g_frequency = vidioc_g_frequency,
275 .vidioc_s_frequency = vidioc_s_frequency,
276 .vidioc_queryctrl = vidioc_queryctrl,
277 .vidioc_g_ctrl = vidioc_g_ctrl,
278 .vidioc_s_ctrl = vidioc_s_ctrl,
279};
280
281
282static struct isapnp_device_id id_table[] __devinitdata = {
283 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
284 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
285 { ISAPNP_CARD_END, },
286};
287
288MODULE_DEVICE_TABLE(isapnp, id_table);
289
290static int __init isapnp_fmi_probe(void)
291{
292 int i = 0;
293
294 while (id_table[i].card_vendor != 0 && dev == NULL) {
295 dev = pnp_find_dev(NULL, id_table[i].vendor,
296 id_table[i].function, NULL);
297 i++;
298 }
299
300 if (!dev)
301 return -ENODEV;
302 if (pnp_device_attach(dev) < 0)
303 return -EAGAIN;
304 if (pnp_activate_dev(dev) < 0) {
305 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
306 pnp_device_detach(dev);
307 return -ENOMEM;
308 }
309 if (!pnp_port_valid(dev, 0)) {
310 pnp_device_detach(dev);
311 return -ENODEV;
312 }
313
314 i = pnp_port_start(dev, 0);
315 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
316
317 return i;
318}
319
320static int __init fmi_init(void)
321{
322 struct fmi *fmi = &fmi_card;
323 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
324 int res, i;
325 int probe_ports[] = { 0, 0x284, 0x384 };
326
327 if (io < 0) {
328 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
329 io = probe_ports[i];
330 if (io == 0) {
331 io = isapnp_fmi_probe();
332 if (io < 0)
333 continue;
334 pnp_attached = 1;
335 }
336 if (!request_region(io, 2, "radio-sf16fmi")) {
337 if (pnp_attached)
338 pnp_device_detach(dev);
339 io = -1;
340 continue;
341 }
342 if (pnp_attached ||
343 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
344 break;
345 release_region(io, 2);
346 io = -1;
347 }
348 } else {
349 if (!request_region(io, 2, "radio-sf16fmi")) {
350 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
351 return -EBUSY;
352 }
353 if (inb(io) == 0xff) {
354 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
355 release_region(io, 2);
356 return -ENODEV;
357 }
358 }
359 if (io < 0) {
360 printk(KERN_ERR "radio-sf16fmi: no cards found\n");
361 return -ENODEV;
362 }
363
364 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
365 fmi->io = io;
366
367 res = v4l2_device_register(NULL, v4l2_dev);
368 if (res < 0) {
369 release_region(fmi->io, 2);
370 if (pnp_attached)
371 pnp_device_detach(dev);
372 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
373 return res;
374 }
375
376 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
377 fmi->vdev.v4l2_dev = v4l2_dev;
378 fmi->vdev.fops = &fmi_fops;
379 fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
380 fmi->vdev.release = video_device_release_empty;
381 video_set_drvdata(&fmi->vdev, fmi);
382
383 mutex_init(&fmi->lock);
384
385 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
386 v4l2_device_unregister(v4l2_dev);
387 release_region(fmi->io, 2);
388 if (pnp_attached)
389 pnp_device_detach(dev);
390 return -EINVAL;
391 }
392
393 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
394
395 fmi_mute(fmi);
396 return 0;
397}
398
399static void __exit fmi_exit(void)
400{
401 struct fmi *fmi = &fmi_card;
402
403 video_unregister_device(&fmi->vdev);
404 v4l2_device_unregister(&fmi->v4l2_dev);
405 release_region(fmi->io, 2);
406 if (dev && pnp_attached)
407 pnp_device_detach(dev);
408}
409
410module_init(fmi_init);
411module_exit(fmi_exit);
412
