1 /* SF16-FMI and SF16-FMP 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 SF16-FMI/SF16-FMP
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 SF16-FMI and SF16-FMP 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 SF16-FMI or SF16-FMP 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;
51 unsigned long curfreq; /* freq in kHz */
55 static struct fmi fmi_card;
56 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 interval 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->mute ? 0x00 : 0x08; /* mute/unmute */
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)
145 struct fmi *fmi = video_drvdata(file);
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);
161 static int vidioc_s_tuner(struct file *file, void *priv,
162 struct v4l2_tuner *v)
164 return v->index ? -EINVAL : 0;
167 static int vidioc_s_frequency(struct file *file, void *priv,
168 struct v4l2_frequency *f)
170 struct fmi *fmi = video_drvdata(file);
172 if (f->tuner != 0 || f->type != V4L2_TUNER_RADIO)
174 if (f->frequency < RSF16_MINFREQ ||
175 f->frequency > RSF16_MAXFREQ)
177 /* rounding in steps of 800 to match the freq
179 fmi_setfreq(fmi, (f->frequency / 800) * 800);
183 static int vidioc_g_frequency(struct file *file, void *priv,
184 struct v4l2_frequency *f)
186 struct fmi *fmi = video_drvdata(file);
190 f->type = V4L2_TUNER_RADIO;
191 f->frequency = fmi->curfreq;
195 static int vidioc_queryctrl(struct file *file, void *priv,
196 struct v4l2_queryctrl *qc)
199 case V4L2_CID_AUDIO_MUTE:
200 return v4l2_ctrl_query_fill(qc, 0, 1, 1, 1);
205 static int vidioc_g_ctrl(struct file *file, void *priv,
206 struct v4l2_control *ctrl)
208 struct fmi *fmi = video_drvdata(file);
211 case V4L2_CID_AUDIO_MUTE:
212 ctrl->value = fmi->mute;
218 static int vidioc_s_ctrl(struct file *file, void *priv,
219 struct v4l2_control *ctrl)
221 struct fmi *fmi = video_drvdata(file);
224 case V4L2_CID_AUDIO_MUTE:
229 fmi->mute = ctrl->value;
235 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
241 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
243 return i ? -EINVAL : 0;
246 static int vidioc_g_audio(struct file *file, void *priv,
247 struct v4l2_audio *a)
250 strlcpy(a->name, "Radio", sizeof(a->name));
251 a->capability = V4L2_AUDCAP_STEREO;
255 static int vidioc_s_audio(struct file *file, void *priv,
256 struct v4l2_audio *a)
258 return a->index ? -EINVAL : 0;
261 static const struct v4l2_file_operations fmi_fops = {
262 .owner = THIS_MODULE,
263 .ioctl = video_ioctl2,
266 static 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,
281 /* ladis: this is my card. does any other types exist? */
282 static 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, },
288 MODULE_DEVICE_TABLE(isapnp, id_table);
290 static int __init isapnp_fmi_probe(void)
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);
302 if (pnp_device_attach(dev) < 0)
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);
309 if (!pnp_port_valid(dev, 0)) {
310 pnp_device_detach(dev);
314 i = pnp_port_start(dev, 0);
315 printk(KERN_INFO "radio-sf16fmi: PnP reports card at %#x\n", i);
320 static int __init fmi_init(void)
322 struct fmi *fmi = &fmi_card;
323 struct v4l2_device *v4l2_dev = &fmi->v4l2_dev;
325 int probe_ports[] = { 0, 0x284, 0x384 };
328 for (i = 0; i < ARRAY_SIZE(probe_ports); i++) {
331 io = isapnp_fmi_probe();
336 if (!request_region(io, 2, "radio-sf16fmi")) {
338 pnp_device_detach(dev);
343 ((inb(io) & 0xf9) == 0xf9 && (inb(io) & 0x4) == 0))
345 release_region(io, 2);
349 if (!request_region(io, 2, "radio-sf16fmi")) {
350 printk(KERN_ERR "radio-sf16fmi: port %#x already in use\n", io);
353 if (inb(io) == 0xff) {
354 printk(KERN_ERR "radio-sf16fmi: card not present at %#x\n", io);
355 release_region(io, 2);
360 printk(KERN_ERR "radio-sf16fmi: no cards found\n");
364 strlcpy(v4l2_dev->name, "sf16fmi", sizeof(v4l2_dev->name));
367 res = v4l2_device_register(NULL, v4l2_dev);
369 release_region(fmi->io, 2);
371 pnp_device_detach(dev);
372 v4l2_err(v4l2_dev, "Could not register v4l2_device\n");
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);
383 mutex_init(&fmi->lock);
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);
389 pnp_device_detach(dev);
393 v4l2_info(v4l2_dev, "card driver at 0x%x\n", fmi->io);
394 /* mute card - prevents noisy bootups */
399 static void __exit fmi_exit(void)
401 struct fmi *fmi = &fmi_card;
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);
410 module_init(fmi_init);
411 module_exit(fmi_exit);