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
18 #include <linux/kernel.h> /* __setup */
19 #include <linux/module.h> /* Modules */
20 #include <linux/init.h> /* Initdata */
21 #include <linux/ioport.h> /* check_region, request_region */
22 #include <linux/delay.h> /* udelay */
23 #include <linux/videodev.h> /* kernel radio structs */
24 #include <linux/isapnp.h>
25 #include <asm/io.h> /* outb, outb_p */
26 #include <asm/uaccess.h> /* copy to/from user */
27 #include <asm/semaphore.h>
32 int curvol; /* 1 or 0 */
33 unsigned long curfreq; /* freq in kHz */
38 static int radio_nr = -1;
39 static struct pnp_dev *dev = NULL;
40 static struct semaphore lock;
42 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
43 /* It is only useful to give freq in intervall of 800 (=0.05Mhz),
44 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
47 #define RSF16_ENCODE(x) ((x)/800+214)
48 #define RSF16_MINFREQ 87*16000
49 #define RSF16_MAXFREQ 108*16000
51 static void outbits(int bits, unsigned int data, int port)
69 static inline void fmi_mute(int port)
76 static inline void fmi_unmute(int port)
83 static inline int fmi_setfreq(struct fmi_device *dev)
85 int myport = dev->port;
86 unsigned long freq = dev->curfreq;
90 outbits(16, RSF16_ENCODE(freq), myport);
91 outbits(8, 0xC0, myport);
92 current->state = TASK_UNINTERRUPTIBLE;
93 schedule_timeout(HZ/7);
95 if (dev->curvol) fmi_unmute(myport);
99 static inline int fmi_getsigstr(struct fmi_device *dev)
103 int myport = dev->port;
107 val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
109 outb(val | 0x10, myport);
110 set_current_state(TASK_UNINTERRUPTIBLE);
111 schedule_timeout(HZ/7);
112 res = (int)inb(myport+1);
116 return (res & 2) ? 0 : 0xFFFF;
119 static int fmi_do_ioctl(struct inode *inode, struct file *file,
120 unsigned int cmd, void *arg)
122 struct video_device *dev = video_devdata(file);
123 struct fmi_device *fmi=dev->priv;
129 struct video_capability *v = arg;
130 memset(v,0,sizeof(*v));
131 strcpy(v->name, "SF16-FMx radio");
132 v->type=VID_TYPE_TUNER;
139 struct video_tuner *v = arg;
142 if(v->tuner) /* Only 1 tuner */
144 strcpy(v->name, "FM");
145 mult = (fmi->flags & VIDEO_TUNER_LOW) ? 1 : 1000;
146 v->rangelow = RSF16_MINFREQ/mult;
147 v->rangehigh = RSF16_MAXFREQ/mult;
149 v->mode=VIDEO_MODE_AUTO;
150 v->signal = fmi_getsigstr(fmi);
155 struct video_tuner *v = arg;
158 fmi->flags = v->flags & VIDEO_TUNER_LOW;
159 /* Only 1 tuner so no setting needed ! */
164 unsigned long *freq = arg;
165 *freq = fmi->curfreq;
166 if (!(fmi->flags & VIDEO_TUNER_LOW))
172 unsigned long *freq = arg;
173 if (!(fmi->flags & VIDEO_TUNER_LOW))
175 if (*freq < RSF16_MINFREQ || *freq > RSF16_MAXFREQ )
177 /*rounding in steps of 800 to match th freq
179 fmi->curfreq = (*freq/800)*800;
185 struct video_audio *v = arg;
186 memset(v,0,sizeof(*v));
187 v->flags=( (!fmi->curvol)*VIDEO_AUDIO_MUTE | VIDEO_AUDIO_MUTABLE);
188 strcpy(v->name, "Radio");
189 v->mode=VIDEO_SOUND_STEREO;
194 struct video_audio *v = arg;
197 fmi->curvol= v->flags&VIDEO_AUDIO_MUTE ? 0 : 1;
199 fmi_unmute(fmi->port) : fmi_mute(fmi->port);
204 struct video_unit *v = arg;
205 v->video=VIDEO_NO_UNIT;
206 v->vbi=VIDEO_NO_UNIT;
208 v->audio=0; /* How do we find out this??? */
209 v->teletext=VIDEO_NO_UNIT;
217 static int fmi_ioctl(struct inode *inode, struct file *file,
218 unsigned int cmd, unsigned long arg)
220 return video_usercopy(inode, file, cmd, arg, fmi_do_ioctl);
223 static struct fmi_device fmi_unit;
225 static struct file_operations fmi_fops = {
226 .owner = THIS_MODULE,
227 .open = video_exclusive_open,
228 .release = video_exclusive_release,
233 static struct video_device fmi_radio=
235 .owner = THIS_MODULE,
236 .name = "SF16FMx radio",
237 .type = VID_TYPE_TUNER,
238 .hardware = VID_HARDWARE_SF16MI,
242 /* ladis: this is my card. does any other types exist? */
243 static struct isapnp_device_id id_table[] __devinitdata = {
244 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
245 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
246 { ISAPNP_CARD_END, },
249 MODULE_DEVICE_TABLE(isapnp, id_table);
251 static int isapnp_fmi_probe(void)
255 while (id_table[i].card_vendor != 0 && dev == NULL) {
256 dev = pnp_find_dev(NULL, id_table[i].vendor,
257 id_table[i].function, NULL);
263 if (pnp_device_attach(dev) < 0)
265 if (pnp_activate_dev(dev) < 0) {
266 printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
267 pnp_device_detach(dev);
270 if (!pnp_port_valid(dev, 0)) {
271 pnp_device_detach(dev);
275 i = pnp_port_start(dev, 0);
276 printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
281 static int __init fmi_init(void)
284 io = isapnp_fmi_probe();
286 printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
289 if (!request_region(io, 2, "radio-sf16fmi")) {
290 printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
296 fmi_unit.curfreq = 0;
297 fmi_unit.flags = VIDEO_TUNER_LOW;
298 fmi_radio.priv = &fmi_unit;
302 if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) {
303 release_region(io, 2);
307 printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
308 /* mute card - prevents noisy bootups */
313 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
314 MODULE_DESCRIPTION("A driver for the SF16MI radio.");
315 MODULE_LICENSE("GPL");
317 MODULE_PARM(io, "i");
318 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
319 MODULE_PARM(radio_nr, "i");
321 static void __exit fmi_cleanup_module(void)
323 video_unregister_device(&fmi_radio);
324 release_region(io, 2);
326 pnp_device_detach(dev);
329 module_init(fmi_init);
330 module_exit(fmi_cleanup_module);
333 static int __init fmi_setup_io(char *str)
335 get_option(&str, &io);
339 __setup("sf16fm=", fmi_setup_io);