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.cox@linux.org>
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/kernel.h> /* __setup */
20 #include <linux/module.h> /* Modules */
21 #include <linux/init.h> /* Initdata */
22 #include <linux/ioport.h> /* request_region */
23 #include <linux/delay.h> /* udelay */
24 #include <linux/videodev2.h> /* kernel radio structs */
25 #include <media/v4l2-common.h>
26 #include <linux/isapnp.h>
27 #include <asm/io.h> /* outb, outb_p */
28 #include <asm/uaccess.h> /* copy to/from user */
29 #include <linux/mutex.h>
31 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
33 static struct v4l2_queryctrl radio_qctrl[] = {
35 .id = V4L2_CID_AUDIO_MUTE,
40 .type = V4L2_CTRL_TYPE_BOOLEAN,
47 int curvol; /* 1 or 0 */
48 unsigned long curfreq; /* freq in kHz */
53 static int radio_nr = -1;
54 static struct pnp_dev *dev = NULL;
55 static struct mutex lock;
57 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
58 /* It is only useful to give freq in intervall of 800 (=0.05Mhz),
59 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
62 #define RSF16_ENCODE(x) ((x)/800+214)
63 #define RSF16_MINFREQ 87*16000
64 #define RSF16_MAXFREQ 108*16000
66 static void outbits(int bits, unsigned int data, int port)
84 static inline void fmi_mute(int port)
91 static inline void fmi_unmute(int port)
98 static inline int fmi_setfreq(struct fmi_device *dev)
100 int myport = dev->port;
101 unsigned long freq = dev->curfreq;
105 outbits(16, RSF16_ENCODE(freq), myport);
106 outbits(8, 0xC0, myport);
107 msleep(143); /* was schedule_timeout(HZ/7) */
109 if (dev->curvol) fmi_unmute(myport);
113 static inline int fmi_getsigstr(struct fmi_device *dev)
117 int myport = dev->port;
121 val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
123 outb(val | 0x10, myport);
124 msleep(143); /* was schedule_timeout(HZ/7) */
125 res = (int)inb(myport+1);
129 return (res & 2) ? 0 : 0xFFFF;
132 static int fmi_do_ioctl(struct inode *inode, struct file *file,
133 unsigned int cmd, void *arg)
135 struct video_device *dev = video_devdata(file);
136 struct fmi_device *fmi=dev->priv;
140 case VIDIOC_QUERYCAP:
142 struct v4l2_capability *v = arg;
143 memset(v,0,sizeof(*v));
144 strlcpy(v->driver, "radio-sf16fmi", sizeof (v->driver));
145 strlcpy(v->card, "SF16-FMx radio", sizeof (v->card));
146 sprintf(v->bus_info,"ISA");
147 v->version = RADIO_VERSION;
148 v->capabilities = V4L2_CAP_TUNER;
154 struct v4l2_tuner *v = arg;
160 memset(v,0,sizeof(*v));
161 strcpy(v->name, "FM");
162 v->type = V4L2_TUNER_RADIO;
164 mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
165 v->rangelow = RSF16_MINFREQ/mult;
166 v->rangehigh = RSF16_MAXFREQ/mult;
167 v->rxsubchans =V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
168 v->capability=fmi->flags&V4L2_TUNER_CAP_LOW;
169 v->audmode = V4L2_TUNER_MODE_STEREO;
170 v->signal = fmi_getsigstr(fmi);
176 struct v4l2_tuner *v = arg;
183 case VIDIOC_S_FREQUENCY:
185 struct v4l2_frequency *f = arg;
187 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
188 f->frequency *= 1000;
189 if (f->frequency < RSF16_MINFREQ ||
190 f->frequency > RSF16_MAXFREQ )
192 /*rounding in steps of 800 to match th freq
194 fmi->curfreq = (f->frequency/800)*800;
199 case VIDIOC_G_FREQUENCY:
201 struct v4l2_frequency *f = arg;
203 f->type = V4L2_TUNER_RADIO;
204 f->frequency = fmi->curfreq;
205 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
206 f->frequency /= 1000;
210 case VIDIOC_QUERYCTRL:
212 struct v4l2_queryctrl *qc = arg;
215 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
216 if (qc->id && qc->id == radio_qctrl[i].id) {
217 memcpy(qc, &(radio_qctrl[i]),
226 struct v4l2_control *ctrl= arg;
229 case V4L2_CID_AUDIO_MUTE:
230 ctrl->value=fmi->curvol;
237 struct v4l2_control *ctrl= arg;
240 case V4L2_CID_AUDIO_MUTE:
245 fmi_unmute(fmi->port);
247 fmi->curvol=ctrl->value;
254 return v4l_compat_translate_ioctl(inode,file,cmd,arg,
259 static int fmi_ioctl(struct inode *inode, struct file *file,
260 unsigned int cmd, unsigned long arg)
262 return video_usercopy(inode, file, cmd, arg, fmi_do_ioctl);
265 static struct fmi_device fmi_unit;
267 static struct file_operations fmi_fops = {
268 .owner = THIS_MODULE,
269 .open = video_exclusive_open,
270 .release = video_exclusive_release,
272 .compat_ioctl = v4l_compat_ioctl32,
276 static struct video_device fmi_radio=
278 .owner = THIS_MODULE,
279 .name = "SF16FMx radio",
280 .type = VID_TYPE_TUNER,
285 /* ladis: this is my card. does any other types exist? */
286 static struct isapnp_device_id id_table[] __devinitdata = {
287 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
288 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
289 { ISAPNP_CARD_END, },
292 MODULE_DEVICE_TABLE(isapnp, id_table);
294 static int isapnp_fmi_probe(void)
298 while (id_table[i].card_vendor != 0 && dev == NULL) {
299 dev = pnp_find_dev(NULL, id_table[i].vendor,
300 id_table[i].function, NULL);
306 if (pnp_device_attach(dev) < 0)
308 if (pnp_activate_dev(dev) < 0) {
309 printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
310 pnp_device_detach(dev);
313 if (!pnp_port_valid(dev, 0)) {
314 pnp_device_detach(dev);
318 i = pnp_port_start(dev, 0);
319 printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
324 static int __init fmi_init(void)
327 io = isapnp_fmi_probe();
329 printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
332 if (!request_region(io, 2, "radio-sf16fmi")) {
333 printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
339 fmi_unit.curfreq = 0;
340 fmi_unit.flags = V4L2_TUNER_CAP_LOW;
341 fmi_radio.priv = &fmi_unit;
345 if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) {
346 release_region(io, 2);
350 printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
351 /* mute card - prevents noisy bootups */
356 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
357 MODULE_DESCRIPTION("A driver for the SF16MI radio.");
358 MODULE_LICENSE("GPL");
360 module_param(io, int, 0);
361 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
362 module_param(radio_nr, int, 0);
364 static void __exit fmi_cleanup_module(void)
366 video_unregister_device(&fmi_radio);
367 release_region(io, 2);
369 pnp_device_detach(dev);
372 module_init(fmi_init);
373 module_exit(fmi_cleanup_module);