1 /* SF16FMI radio driver for Linux radio support
2 * heavily based on rtrack driver...
3 * (c) 1997 M. Kirkwood
4 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
5 *
6 * Fitted to new interface by Alan Cox <alan@lxorguk.ukuu.org.uk>
7 * Made working and cleaned up functions <mikael.hedin@irf.se>
8 * Support for ISAPnP by Ladislav Michl <ladis@psi.cz>
9 *
10 * Notes on the hardware
11 *
12 * Frequency control is done digitally -- ie out(port,encodefreq(95.8));
13 * No volume control - only mute/unmute - you have to use line volume
14 * control on SB-part of SF16FMI
15 *
16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
17 */
18
19 #include <linux/version.h>
20 #include <linux/kernel.h> /* __setup */
21 #include <linux/module.h> /* Modules */
22 #include <linux/init.h> /* Initdata */
23 #include <linux/ioport.h> /* request_region */
24 #include <linux/delay.h> /* udelay */
25 #include <linux/isapnp.h>
26 #include <linux/mutex.h>
27 #include <linux/videodev2.h> /* kernel radio structs */
28 #include <linux/io.h> /* outb, outb_p */
29 #include <media/v4l2-device.h>
30 #include <media/v4l2-ioctl.h>
31
32 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
33 MODULE_DESCRIPTION("A driver for the SF16MI radio.");
34 MODULE_LICENSE("GPL");
35
36 static int io = -1;
37 static int radio_nr = -1;
38
39 module_param(io, int, 0);
40 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
41 module_param(radio_nr, int, 0);
42
43 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
44
45 struct fmi
46 {
47 struct v4l2_device v4l2_dev;
48 struct video_device vdev;
49 int io;
50 int curvol; /* 1 or 0 */
51 unsigned long curfreq; /* freq in kHz */
52 struct mutex lock;
53 };
54
55 static struct fmi fmi_card;
56 static struct pnp_dev *dev;
57
58 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
59 /* It is only useful to give freq in interval of 800 (=0.05Mhz),
60 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
61 * 92.7400017 -> 92.75
62 */
63 #define RSF16_ENCODE(x) ((x) / 800 + 214)
64 #define RSF16_MINFREQ (87 * 16000)
65 #define RSF16_MAXFREQ (108 * 16000)
66
67 static void outbits(int bits, unsigned int data, int io)
68 {
69 while (bits--) {
70 if (data & 1) {
71 outb(5, io);
72 udelay(6);
73 outb(7, io);
74 udelay(6);
75 } else {
76 outb(1, io);
77 udelay(6);
78 outb(3, io);
79 udelay(6);
80 }
81 data >>= 1;
82 }
83 }
84
85 static inline void fmi_mute(struct fmi *fmi)
86 {
87 mutex_lock(&fmi->lock);
88 outb(0x00, fmi->io);
89 mutex_unlock(&fmi->lock);
90 }
91
92 static inline void fmi_unmute(struct fmi *fmi)
93 {
94 mutex_lock(&fmi->lock);
95 outb(0x08, fmi->io);
96 mutex_unlock(&fmi->lock);
97 }
98
99 static inline int fmi_setfreq(struct fmi *fmi, unsigned long freq)
100 {
101 mutex_lock(&fmi->lock);
102 fmi->curfreq = freq;
103
104 outbits(16, RSF16_ENCODE(freq), fmi->io);
105 outbits(8, 0xC0, fmi->io);
106 msleep(143); /* was schedule_timeout(HZ/7) */
107 mutex_unlock(&fmi->lock);
108 if (fmi->curvol)
109 fmi_unmute(fmi);
110 return 0;
111 }
112
113 static inline int fmi_getsigstr(struct fmi *fmi)
114 {
115 int val;
116 int res;
117
118 mutex_lock(&fmi->lock);
119 val = fmi->curvol ? 0x08 : 0x00; /* unmute/mute */
120 outb(val, fmi->io);
121 outb(val | 0x10, fmi->io);
122 msleep(143); /* was schedule_timeout(HZ/7) */
123 res = (int)inb(fmi->io + 1);
124 outb(val, fmi->io);
125
126 mutex_unlock(&fmi->lock);
127 return (res & 2) ? 0 : 0xFFFF;
128 }
129
130 static int vidioc_querycap(struct file *file, void *priv,
131 struct v4l2_capability *v)
132 {
133 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
134 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
135 strlcpy(v->bus_info, "ISA", sizeof(v->bus_info));
136 v->version = RADIO_VERSION;
137 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
138 return 0;
139 }
140
141 static int vidioc_g_tuner(struct file *file, void *priv,
142 struct v4l2_tuner *v)
143 {
144 struct fmi *fmi = video_drvdata(file);
145
146 if (v->index > 0)
147 return -EINVAL;
148
149 strlcpy(v->name, "FM", sizeof(v->name));
150 v->type = V4L2_TUNER_RADIO;
151 v->rangelow = RSF16_MINFREQ;
152 v->rangehigh = RSF16_MAXFREQ;
153 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
154 v->capability = V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LOW;
155 v->audmode = V4L2_TUNER_MODE_STEREO;
156 v->signal = fmi_getsigstr(fmi);
157 return 0;
158 }
159
160 static int vidioc_s_tuner(struct file *file, void *priv,
161 struct v4l2_tuner *v)
162 {
163 return v->index ? -EINVAL : 0;
164 }
165
166 static int vidioc_s_frequency(struct file *file, void *priv,
167 struct v4l2_frequency *f)
168 {
169 struct fmi *fmi = video_drvdata(file);
170
171 if (f->frequency < RSF16_MINFREQ ||
172 f->frequency > RSF16_MAXFREQ)
173 return -EINVAL;
174 /* rounding in steps of 800 to match the freq
175 that will be used */
176 fmi_setfreq(fmi, (f->frequency / 800) * 800);
177 return 0;
178 }
179
180 static int vidioc_g_frequency(struct file *file, void *priv,
181 struct v4l2_frequency *f)
182 {
183 struct fmi *fmi = video_drvdata(file);
184
185 f->type = V4L2_TUNER_RADIO;
186 f->frequency = fmi->curfreq;
187 return 0;
188 }
189
190 static int vidioc_queryctrl(struct file *file, void *priv,
191 struct v4l2_queryctrl *qc)
192 {
193 switch (qc->id) {
194 case V4L2_CID_AUDIO_MUTE:
195 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
196 }
197 return -EINVAL;
198 }
199
200 static int vidioc_g_ctrl(struct file *file, void *priv,
201 struct v4l2_control *ctrl)
202 {
203 struct fmi *fmi = video_drvdata(file);
204
205 switch (ctrl->id) {
206 case V4L2_CID_AUDIO_MUTE:
207 ctrl->value = fmi->curvol;
208 return 0;
209 }
210 return -EINVAL;
211 }
212
213 static int vidioc_s_ctrl(struct file *file, void *priv,
214 struct v4l2_control *ctrl)
215 {
216 struct fmi *fmi = video_drvdata(file);
217
218 switch (ctrl->id) {
219 case V4L2_CID_AUDIO_MUTE:
220 if (ctrl->value)
221 fmi_mute(fmi);
222 else
223 fmi_unmute(fmi);
224 fmi->curvol = ctrl->value;
225 return 0;
226 }
227 return -EINVAL;
228 }
229
230 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
231 {
232 *i = 0;
233 return 0;
234 }
235
236 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
237 {
238 return i ? -EINVAL : 0;
239 }
240
241 static int vidioc_g_audio(struct file *file, void *priv,
242 struct v4l2_audio *a)
243 {
244 a->index = 0;
245 strlcpy(a->name, "Radio", sizeof(a->name));
246 a->capability = V4L2_AUDCAP_STEREO;
247 return 0;
248 }
249
250 static int vidioc_s_audio(struct file *file, void *priv,
251 struct v4l2_audio *a)
252 {
253 return a->index ? -EINVAL : 0;
254 }
255
256 static const struct v4l2_file_operations fmi_fops = {
257 .owner = THIS_MODULE,
258 .ioctl = video_ioctl2,
259 };
260
261 static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
262 .vidioc_querycap = vidioc_querycap,
263 .vidioc_g_tuner = vidioc_g_tuner,
264 .vidioc_s_tuner = vidioc_s_tuner,
265 .vidioc_g_audio = vidioc_g_audio,
266 .vidioc_s_audio = vidioc_s_audio,
267 .vidioc_g_input = vidioc_g_input,
268 .vidioc_s_input = vidioc_s_input,
269 .vidioc_g_frequency = vidioc_g_frequency,
270 .vidioc_s_frequency = vidioc_s_frequency,
271 .vidioc_queryctrl = vidioc_queryctrl,
272 .vidioc_g_ctrl = vidioc_g_ctrl,
273 .vidioc_s_ctrl = vidioc_s_ctrl,
274 };
275
276 /* ladis: this is my card. does any other types exist? */
277 static struct isapnp_device_id id_table[] __devinitdata = {
278 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
279 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
280 { ISAPNP_CARD_END, },
281 };
282
283 MODULE_DEVICE_TABLE(isapnp, id_table);
284
285 static int __init isapnp_fmi_probe(void)
286 {
287 int i = 0;
288
289 while (id_table[i].card_vendor != 0 && dev == NULL) {
290 dev = pnp_find_dev(NULL, id_table[i].vendor,
291 id_table[i].function, NULL);
292 i++;
293 }
294
295 if (!dev)
296 return -ENODEV;
297 if (pnp_device_attach(dev) < 0)
298 return -EAGAIN;
299 if (pnp_activate_dev(dev) < 0) {
300 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
301 pnp_device_detach(dev);
302 return -ENOMEM;
303 }
304 if (!pnp_port_valid(dev, 0)) {
305 pnp_device_detach(dev);
306 return -ENODEV;
307 }
308
309 i = pnp_port_start(dev, 0);
310 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
311
312 return i;
313 }
314
315 static int __init fmi_init(void)
316 {
317 struct fmi *fmi = &fmi_card;
318 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
319 int res;
320
321 if (io < 0)
322 io = isapnp_fmi_probe();
323 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
324 fmi->io = io;
325 if (fmi->io < 0) {
326 v4l2_err(v4l2_dev, "No PnP card found.\n");
327 return fmi->io;
328 }
329 if (!request_region(io, 2, "radio-sf16fmi")) {
330 v4l2_err(v4l2_dev, "port 0x%x already in use\n", fmi->io);
331 pnp_device_detach(dev);
332 return -EBUSY;
333 }
334
335 res = v4l2_device_register(NULL, v4l2_dev);
336 if (res < 0) {
337 release_region(fmi->io, 2);
338 pnp_device_detach(dev);
339 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
340 return res;
341 }
342
343 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
344 fmi->vdev.v4l2_dev = v4l2_dev;
345 fmi->vdev.fops = &fmi_fops;
346 fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
347 fmi->vdev.release = video_device_release_empty;
348 video_set_drvdata(&fmi->vdev, fmi);
349
350 mutex_init(&fmi->lock);
351
352 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
353 v4l2_device_unregister(v4l2_dev);
354 release_region(fmi->io, 2);
355 pnp_device_detach(dev);
356 return -EINVAL;
357 }
358
359 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
360 /* mute card - prevents noisy bootups */
361 fmi_mute(fmi);
362 return 0;
363 }
364
365 static void __exit fmi_exit(void)
366 {
367 struct fmi *fmi = &fmi_card;
368
369 video_unregister_device(&fmi->vdev);
370 v4l2_device_unregister(&fmi->v4l2_dev);
371 release_region(fmi->io, 2);
372 if (dev)
373 pnp_device_detach(dev);
374 }
375
376 module_init(fmi_init);
377 module_exit(fmi_exit);
378
|
This page was automatically generated by the
LXR engine.
|