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/videodev2.h> /* kernel radio structs */
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-ioctl.h>
28 #include <linux/isapnp.h>
29 #include <asm/io.h> /* outb, outb_p */
30 #include <asm/uaccess.h> /* copy to/from user */
31 #include <linux/mutex.h>
33 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
35 static struct v4l2_queryctrl radio_qctrl[] = {
37 .id = V4L2_CID_AUDIO_MUTE,
42 .type = V4L2_CTRL_TYPE_BOOLEAN,
50 int curvol; /* 1 or 0 */
51 unsigned long curfreq; /* freq in kHz */
56 static int radio_nr = -1;
57 static struct pnp_dev *dev = NULL;
58 static struct mutex lock;
60 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
61 /* It is only useful to give freq in intervall of 800 (=0.05Mhz),
62 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
65 #define RSF16_ENCODE(x) ((x)/800+214)
66 #define RSF16_MINFREQ 87*16000
67 #define RSF16_MAXFREQ 108*16000
69 static void outbits(int bits, unsigned int data, int port)
87 static inline void fmi_mute(int port)
94 static inline void fmi_unmute(int port)
101 static inline int fmi_setfreq(struct fmi_device *dev)
103 int myport = dev->port;
104 unsigned long freq = dev->curfreq;
108 outbits(16, RSF16_ENCODE(freq), myport);
109 outbits(8, 0xC0, myport);
110 msleep(143); /* was schedule_timeout(HZ/7) */
112 if (dev->curvol) fmi_unmute(myport);
116 static inline int fmi_getsigstr(struct fmi_device *dev)
120 int myport = dev->port;
124 val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
126 outb(val | 0x10, myport);
127 msleep(143); /* was schedule_timeout(HZ/7) */
128 res = (int)inb(myport+1);
132 return (res & 2) ? 0 : 0xFFFF;
135 static int vidioc_querycap(struct file *file, void *priv,
136 struct v4l2_capability *v)
138 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
139 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
140 sprintf(v->bus_info, "ISA");
141 v->version = RADIO_VERSION;
142 v->capabilities = V4L2_CAP_TUNER;
146 static int vidioc_g_tuner(struct file *file, void *priv,
147 struct v4l2_tuner *v)
150 struct fmi_device *fmi = video_drvdata(file);
155 strcpy(v->name, "FM");
156 v->type = V4L2_TUNER_RADIO;
157 mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
158 v->rangelow = RSF16_MINFREQ/mult;
159 v->rangehigh = RSF16_MAXFREQ/mult;
160 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
161 v->capability = fmi->flags&V4L2_TUNER_CAP_LOW;
162 v->audmode = V4L2_TUNER_MODE_STEREO;
163 v->signal = fmi_getsigstr(fmi);
167 static int vidioc_s_tuner(struct file *file, void *priv,
168 struct v4l2_tuner *v)
175 static int vidioc_s_frequency(struct file *file, void *priv,
176 struct v4l2_frequency *f)
178 struct fmi_device *fmi = video_drvdata(file);
180 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
181 f->frequency *= 1000;
182 if (f->frequency < RSF16_MINFREQ ||
183 f->frequency > RSF16_MAXFREQ )
185 /*rounding in steps of 800 to match th freq
187 fmi->curfreq = (f->frequency/800)*800;
192 static int vidioc_g_frequency(struct file *file, void *priv,
193 struct v4l2_frequency *f)
195 struct fmi_device *fmi = video_drvdata(file);
197 f->type = V4L2_TUNER_RADIO;
198 f->frequency = fmi->curfreq;
199 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
200 f->frequency /= 1000;
204 static int vidioc_queryctrl(struct file *file, void *priv,
205 struct v4l2_queryctrl *qc)
209 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
210 if (qc->id && qc->id == radio_qctrl[i].id) {
211 memcpy(qc, &(radio_qctrl[i]),
219 static int vidioc_g_ctrl(struct file *file, void *priv,
220 struct v4l2_control *ctrl)
222 struct fmi_device *fmi = video_drvdata(file);
225 case V4L2_CID_AUDIO_MUTE:
226 ctrl->value = fmi->curvol;
232 static int vidioc_s_ctrl(struct file *file, void *priv,
233 struct v4l2_control *ctrl)
235 struct fmi_device *fmi = video_drvdata(file);
238 case V4L2_CID_AUDIO_MUTE:
242 fmi_unmute(fmi->port);
243 fmi->curvol = ctrl->value;
249 static int vidioc_g_audio(struct file *file, void *priv,
250 struct v4l2_audio *a)
255 strcpy(a->name, "Radio");
256 a->capability = V4L2_AUDCAP_STEREO;
260 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
266 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
273 static int vidioc_s_audio(struct file *file, void *priv,
274 struct v4l2_audio *a)
281 static struct fmi_device fmi_unit;
283 static int fmi_exclusive_open(struct file *file)
285 return test_and_set_bit(0, &fmi_unit.in_use) ? -EBUSY : 0;
288 static int fmi_exclusive_release(struct file *file)
290 clear_bit(0, &fmi_unit.in_use);
294 static const struct v4l2_file_operations fmi_fops = {
295 .owner = THIS_MODULE,
296 .open = fmi_exclusive_open,
297 .release = fmi_exclusive_release,
298 .ioctl = video_ioctl2,
301 static const struct v4l2_ioctl_ops fmi_ioctl_ops = {
302 .vidioc_querycap = vidioc_querycap,
303 .vidioc_g_tuner = vidioc_g_tuner,
304 .vidioc_s_tuner = vidioc_s_tuner,
305 .vidioc_g_audio = vidioc_g_audio,
306 .vidioc_s_audio = vidioc_s_audio,
307 .vidioc_g_input = vidioc_g_input,
308 .vidioc_s_input = vidioc_s_input,
309 .vidioc_g_frequency = vidioc_g_frequency,
310 .vidioc_s_frequency = vidioc_s_frequency,
311 .vidioc_queryctrl = vidioc_queryctrl,
312 .vidioc_g_ctrl = vidioc_g_ctrl,
313 .vidioc_s_ctrl = vidioc_s_ctrl,
316 static struct video_device fmi_radio = {
317 .name = "SF16FMx radio",
319 .ioctl_ops = &fmi_ioctl_ops,
320 .release = video_device_release_empty,
323 /* ladis: this is my card. does any other types exist? */
324 static struct isapnp_device_id id_table[] __devinitdata = {
325 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
326 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
327 { ISAPNP_CARD_END, },
330 MODULE_DEVICE_TABLE(isapnp, id_table);
332 static int __init isapnp_fmi_probe(void)
336 while (id_table[i].card_vendor != 0 && dev == NULL) {
337 dev = pnp_find_dev(NULL, id_table[i].vendor,
338 id_table[i].function, NULL);
344 if (pnp_device_attach(dev) < 0)
346 if (pnp_activate_dev(dev) < 0) {
347 printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
348 pnp_device_detach(dev);
351 if (!pnp_port_valid(dev, 0)) {
352 pnp_device_detach(dev);
356 i = pnp_port_start(dev, 0);
357 printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
362 static int __init fmi_init(void)
365 io = isapnp_fmi_probe();
367 printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
370 if (!request_region(io, 2, "radio-sf16fmi")) {
371 printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
372 pnp_device_detach(dev);
378 fmi_unit.curfreq = 0;
379 fmi_unit.flags = V4L2_TUNER_CAP_LOW;
380 video_set_drvdata(&fmi_radio, &fmi_unit);
384 if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
385 release_region(io, 2);
389 printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
390 /* mute card - prevents noisy bootups */
395 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
396 MODULE_DESCRIPTION("A driver for the SF16MI radio.");
397 MODULE_LICENSE("GPL");
399 module_param(io, int, 0);
400 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
401 module_param(radio_nr, int, 0);
403 static void __exit fmi_cleanup_module(void)
405 video_unregister_device(&fmi_radio);
406 release_region(io, 2);
408 pnp_device_detach(dev);
411 module_init(fmi_init);
412 module_exit(fmi_cleanup_module);