1 /* SF16FMI radio driver for Linux radio support
2 * heavily based on rtrack driver...
4 * (c) 1998 Petr Vandrovec, vandrove@vc.cvut.cz
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>
10 * Notes on the hardware
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
16 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
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>
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");
37 static int radio_nr = -1;
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);
43 #define RADIO_VERSION KERNEL_VERSION(0, 0, 2)
47 struct v4l2_device v4l2_dev;
48 struct video_device vdev;
50 int curvol; /* 1 or 0 */
51 unsigned long curfreq; /* freq in kHz */
56 static struct fmi fmi_card;
57 static struct pnp_dev *dev;
59 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
60 /* It is only useful to give freq in intervall of 800 (=0.05Mhz),
61 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
64 #define RSF16_ENCODE(x) ((x) / 800 + 214)
65 #define RSF16_MINFREQ (87 * 16000)
66 #define RSF16_MAXFREQ (108 * 16000)
68 static void outbits(int bits, unsigned int data, int io)
86 static inline void fmi_mute(struct fmi *fmi)
88 mutex_lock(&fmi->lock);
90 mutex_unlock(&fmi->lock);
93 static inline void fmi_unmute(struct fmi *fmi)
95 mutex_lock(&fmi->lock);
97 mutex_unlock(&fmi->lock);
100 static inline int fmi_setfreq(struct fmi *fmi, unsigned long freq)
102 mutex_lock(&fmi->lock);
105 outbits(16, RSF16_ENCODE(freq), fmi->io);
106 outbits(8, 0xC0, fmi->io);
107 msleep(143); /* was schedule_timeout(HZ/7) */
108 mutex_unlock(&fmi->lock);
114 static inline int fmi_getsigstr(struct fmi *fmi)
119 mutex_lock(&fmi->lock);
120 val = fmi->curvol ? 0x08 : 0x00; /* unmute/mute */
122 outb(val | 0x10, fmi->io);
123 msleep(143); /* was schedule_timeout(HZ/7) */
124 res = (int)inb(fmi->io + 1);
127 mutex_unlock(&fmi->lock);
128 return (res & 2) ? 0 : 0xFFFF;
131 static int vidioc_querycap(struct file *file, void *priv,
132 struct v4l2_capability *v)
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;
142 static int vidioc_g_tuner(struct file *file, void *priv,
143 struct v4l2_tuner *v)
146 struct fmi *fmi = video_drvdata(file);
151 strlcpy(v->name, "FM", sizeof(v->name));
152 v->type = V4L2_TUNER_RADIO;
153 mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
154 v->rangelow = RSF16_MINFREQ / mult;
155 v->rangehigh = RSF16_MAXFREQ / mult;
156 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_SUB_STEREO;
157 v->capability = fmi->flags & V4L2_TUNER_CAP_LOW;
158 v->audmode = V4L2_TUNER_MODE_STEREO;
159 v->signal = fmi_getsigstr(fmi);
163 static int vidioc_s_tuner(struct file *file, void *priv,
164 struct v4l2_tuner *v)
166 return v->index ? -EINVAL : 0;
169 static int vidioc_s_frequency(struct file *file, void *priv,
170 struct v4l2_frequency *f)
172 struct fmi *fmi = video_drvdata(file);
174 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
175 f->frequency *= 1000;
176 if (f->frequency < RSF16_MINFREQ ||
177 f->frequency > RSF16_MAXFREQ)
179 /* rounding in steps of 800 to match the freq
181 fmi_setfreq(fmi, (f->frequency / 800) * 800);
185 static int vidioc_g_frequency(struct file *file, void *priv,
186 struct v4l2_frequency *f)
188 struct fmi *fmi = video_drvdata(file);
190 f->type = V4L2_TUNER_RADIO;
191 f->frequency = fmi->curfreq;
192 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
193 f->frequency /= 1000;
197 static int vidioc_queryctrl(struct file *file, void *priv,
198 struct v4l2_queryctrl *qc)
201 case V4L2_CID_AUDIO_MUTE:
202 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
207 static int vidioc_g_ctrl(struct file *file, void *priv,
208 struct v4l2_control *ctrl)
210 struct fmi *fmi = video_drvdata(file);
213 case V4L2_CID_AUDIO_MUTE:
214 ctrl->value = fmi->curvol;
220 static int vidioc_s_ctrl(struct file *file, void *priv,
221 struct v4l2_control *ctrl)
223 struct fmi *fmi = video_drvdata(file);
226 case V4L2_CID_AUDIO_MUTE:
231 fmi->curvol = ctrl->value;
237 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
243 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
245 return i ? -EINVAL : 0;
248 static int vidioc_g_audio(struct file *file, void *priv,
249 struct v4l2_audio *a)
252 strlcpy(a->name, "Radio", sizeof(a->name));
253 a->capability = V4L2_AUDCAP_STEREO;
257 static int vidioc_s_audio(struct file *file, void *priv,
258 struct v4l2_audio *a)
260 return a->index ? -EINVAL : 0;
263 static const struct v4l2_file_operations fmi_fops = {
264 .owner = THIS_MODULE,
265 .ioctl = video_ioctl2,
268 static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
269 .vidioc_querycap = vidioc_querycap,
270 .vidioc_g_tuner = vidioc_g_tuner,
271 .vidioc_s_tuner = vidioc_s_tuner,
272 .vidioc_g_audio = vidioc_g_audio,
273 .vidioc_s_audio = vidioc_s_audio,
274 .vidioc_g_input = vidioc_g_input,
275 .vidioc_s_input = vidioc_s_input,
276 .vidioc_g_frequency = vidioc_g_frequency,
277 .vidioc_s_frequency = vidioc_s_frequency,
278 .vidioc_queryctrl = vidioc_queryctrl,
279 .vidioc_g_ctrl = vidioc_g_ctrl,
280 .vidioc_s_ctrl = vidioc_s_ctrl,
283 /* ladis: this is my card. does any other types exist? */
284 static struct isapnp_device_id id_table[] __devinitdata = {
285 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
286 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
287 { ISAPNP_CARD_END, },
290 MODULE_DEVICE_TABLE(isapnp, id_table);
292 static int __init isapnp_fmi_probe(void)
296 while (id_table[i].card_vendor != 0 && dev == NULL) {
297 dev = pnp_find_dev(NULL, id_table[i].vendor,
298 id_table[i].function, NULL);
304 if (pnp_device_attach(dev) < 0)
306 if (pnp_activate_dev(dev) < 0) {
307 printk(KERN_ERR "radio-sf16fmi: PnP configure failed (out of resources?)\n");
308 pnp_device_detach(dev);
311 if (!pnp_port_valid(dev, 0)) {
312 pnp_device_detach(dev);
316 i = pnp_port_start(dev, 0);
317 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
322 static int __init fmi_init(void)
324 struct fmi *fmi = &fmi_card;
325 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
329 io = isapnp_fmi_probe();
330 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
333 v4l2_err(v4l2_dev, "No PnP card found.\n");
336 if (!request_region(io, 2, "radio-sf16fmi")) {
337 v4l2_err(v4l2_dev, "port 0x%x already in use\n", fmi->io);
338 pnp_device_detach(dev);
342 res = v4l2_device_register(NULL, v4l2_dev);
344 release_region(fmi->io, 2);
345 pnp_device_detach(dev);
346 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
350 fmi->flags = V4L2_TUNER_CAP_LOW;
351 strlcpy(fmi->vdev.name, v4l2_dev->name, sizeof(fmi->vdev.name));
352 fmi->vdev.v4l2_dev = v4l2_dev;
353 fmi->vdev.fops = &fmi_fops;
354 fmi->vdev.ioctl_ops = &fmi_ioctl_ops;
355 fmi->vdev.release = video_device_release_empty;
356 video_set_drvdata(&fmi->vdev, fmi);
358 mutex_init(&fmi->lock);
360 if (video_register_device(&fmi->vdev, VFL_TYPE_RADIO, radio_nr) < 0) {
361 v4l2_device_unregister(v4l2_dev);
362 release_region(fmi->io, 2);
363 pnp_device_detach(dev);
367 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
368 /* mute card - prevents noisy bootups */
373 static void __exit fmi_exit(void)
375 struct fmi *fmi = &fmi_card;
377 video_unregister_device(&fmi->vdev);
378 v4l2_device_unregister(&fmi->v4l2_dev);
379 release_region(fmi->io, 2);
381 pnp_device_detach(dev);
384 module_init(fmi_init);
385 module_exit(fmi_exit);