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/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 <linux/isapnp.h>
28 #include <asm/io.h> /* outb, outb_p */
29 #include <asm/uaccess.h> /* copy to/from user */
30 #include <linux/mutex.h>
32 #define RADIO_VERSION KERNEL_VERSION(0,0,2)
34 static struct v4l2_queryctrl radio_qctrl[] = {
36 .id = V4L2_CID_AUDIO_MUTE,
41 .type = V4L2_CTRL_TYPE_BOOLEAN,
48 int curvol; /* 1 or 0 */
49 unsigned long curfreq; /* freq in kHz */
54 static int radio_nr = -1;
55 static struct pnp_dev *dev = NULL;
56 static struct mutex lock;
58 /* freq is in 1/16 kHz to internal number, hw precision is 50 kHz */
59 /* It is only useful to give freq in intervall of 800 (=0.05Mhz),
60 * other bits will be truncated, e.g 92.7400016 -> 92.7, but
63 #define RSF16_ENCODE(x) ((x)/800+214)
64 #define RSF16_MINFREQ 87*16000
65 #define RSF16_MAXFREQ 108*16000
67 static void outbits(int bits, unsigned int data, int port)
85 static inline void fmi_mute(int port)
92 static inline void fmi_unmute(int port)
99 static inline int fmi_setfreq(struct fmi_device *dev)
101 int myport = dev->port;
102 unsigned long freq = dev->curfreq;
106 outbits(16, RSF16_ENCODE(freq), myport);
107 outbits(8, 0xC0, myport);
108 msleep(143); /* was schedule_timeout(HZ/7) */
110 if (dev->curvol) fmi_unmute(myport);
114 static inline int fmi_getsigstr(struct fmi_device *dev)
118 int myport = dev->port;
122 val = dev->curvol ? 0x08 : 0x00; /* unmute/mute */
124 outb(val | 0x10, myport);
125 msleep(143); /* was schedule_timeout(HZ/7) */
126 res = (int)inb(myport+1);
130 return (res & 2) ? 0 : 0xFFFF;
133 static int vidioc_querycap(struct file *file, void *priv,
134 struct v4l2_capability *v)
136 strlcpy(v->driver, "radio-sf16fmi", sizeof(v->driver));
137 strlcpy(v->card, "SF16-FMx radio", sizeof(v->card));
138 sprintf(v->bus_info, "ISA");
139 v->version = RADIO_VERSION;
140 v->capabilities = V4L2_CAP_TUNER;
144 static int vidioc_g_tuner(struct file *file, void *priv,
145 struct v4l2_tuner *v)
148 struct video_device *dev = video_devdata(file);
149 struct fmi_device *fmi = dev->priv;
154 strcpy(v->name, "FM");
155 v->type = V4L2_TUNER_RADIO;
156 mult = (fmi->flags & V4L2_TUNER_CAP_LOW) ? 1 : 1000;
157 v->rangelow = RSF16_MINFREQ/mult;
158 v->rangehigh = RSF16_MAXFREQ/mult;
159 v->rxsubchans = V4L2_TUNER_SUB_MONO | V4L2_TUNER_MODE_STEREO;
160 v->capability = fmi->flags&V4L2_TUNER_CAP_LOW;
161 v->audmode = V4L2_TUNER_MODE_STEREO;
162 v->signal = fmi_getsigstr(fmi);
166 static int vidioc_s_tuner(struct file *file, void *priv,
167 struct v4l2_tuner *v)
174 static int vidioc_s_frequency(struct file *file, void *priv,
175 struct v4l2_frequency *f)
177 struct video_device *dev = video_devdata(file);
178 struct fmi_device *fmi = dev->priv;
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 video_device *dev = video_devdata(file);
196 struct fmi_device *fmi = dev->priv;
198 f->type = V4L2_TUNER_RADIO;
199 f->frequency = fmi->curfreq;
200 if (!(fmi->flags & V4L2_TUNER_CAP_LOW))
201 f->frequency /= 1000;
205 static int vidioc_queryctrl(struct file *file, void *priv,
206 struct v4l2_queryctrl *qc)
210 for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
211 if (qc->id && qc->id == radio_qctrl[i].id) {
212 memcpy(qc, &(radio_qctrl[i]),
220 static int vidioc_g_ctrl(struct file *file, void *priv,
221 struct v4l2_control *ctrl)
223 struct video_device *dev = video_devdata(file);
224 struct fmi_device *fmi = dev->priv;
227 case V4L2_CID_AUDIO_MUTE:
228 ctrl->value = fmi->curvol;
234 static int vidioc_s_ctrl(struct file *file, void *priv,
235 struct v4l2_control *ctrl)
237 struct video_device *dev = video_devdata(file);
238 struct fmi_device *fmi = dev->priv;
241 case V4L2_CID_AUDIO_MUTE:
245 fmi_unmute(fmi->port);
246 fmi->curvol = ctrl->value;
252 static int vidioc_g_audio(struct file *file, void *priv,
253 struct v4l2_audio *a)
258 strcpy(a->name, "Radio");
259 a->capability = V4L2_AUDCAP_STEREO;
263 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
269 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
276 static int vidioc_s_audio(struct file *file, void *priv,
277 struct v4l2_audio *a)
284 static struct fmi_device fmi_unit;
286 static const struct file_operations fmi_fops = {
287 .owner = THIS_MODULE,
288 .open = video_exclusive_open,
289 .release = video_exclusive_release,
290 .ioctl = video_ioctl2,
291 .compat_ioctl = v4l_compat_ioctl32,
295 static struct video_device fmi_radio=
297 .owner = THIS_MODULE,
298 .name = "SF16FMx radio",
299 .type = VID_TYPE_TUNER,
301 .vidioc_querycap = vidioc_querycap,
302 .vidioc_g_tuner = vidioc_g_tuner,
303 .vidioc_s_tuner = vidioc_s_tuner,
304 .vidioc_g_audio = vidioc_g_audio,
305 .vidioc_s_audio = vidioc_s_audio,
306 .vidioc_g_input = vidioc_g_input,
307 .vidioc_s_input = vidioc_s_input,
308 .vidioc_g_frequency = vidioc_g_frequency,
309 .vidioc_s_frequency = vidioc_s_frequency,
310 .vidioc_queryctrl = vidioc_queryctrl,
311 .vidioc_g_ctrl = vidioc_g_ctrl,
312 .vidioc_s_ctrl = vidioc_s_ctrl,
315 /* ladis: this is my card. does any other types exist? */
316 static struct isapnp_device_id id_table[] __devinitdata = {
317 { ISAPNP_ANY_ID, ISAPNP_ANY_ID,
318 ISAPNP_VENDOR('M','F','R'), ISAPNP_FUNCTION(0xad10), 0},
319 { ISAPNP_CARD_END, },
322 MODULE_DEVICE_TABLE(isapnp, id_table);
324 static int __init isapnp_fmi_probe(void)
328 while (id_table[i].card_vendor != 0 && dev == NULL) {
329 dev = pnp_find_dev(NULL, id_table[i].vendor,
330 id_table[i].function, NULL);
336 if (pnp_device_attach(dev) < 0)
338 if (pnp_activate_dev(dev) < 0) {
339 printk ("radio-sf16fmi: PnP configure failed (out of resources?)\n");
340 pnp_device_detach(dev);
343 if (!pnp_port_valid(dev, 0)) {
344 pnp_device_detach(dev);
348 i = pnp_port_start(dev, 0);
349 printk ("radio-sf16fmi: PnP reports card at %#x\n", i);
354 static int __init fmi_init(void)
357 io = isapnp_fmi_probe();
359 printk(KERN_ERR "radio-sf16fmi: No PnP card found.\n");
362 if (!request_region(io, 2, "radio-sf16fmi")) {
363 printk(KERN_ERR "radio-sf16fmi: port 0x%x already in use\n", io);
364 pnp_device_detach(dev);
370 fmi_unit.curfreq = 0;
371 fmi_unit.flags = V4L2_TUNER_CAP_LOW;
372 fmi_radio.priv = &fmi_unit;
376 if (video_register_device(&fmi_radio, VFL_TYPE_RADIO, radio_nr) == -1) {
377 release_region(io, 2);
381 printk(KERN_INFO "SF16FMx radio card driver at 0x%x\n", io);
382 /* mute card - prevents noisy bootups */
387 MODULE_AUTHOR("Petr Vandrovec, vandrove@vc.cvut.cz and M. Kirkwood");
388 MODULE_DESCRIPTION("A driver for the SF16MI radio.");
389 MODULE_LICENSE("GPL");
391 module_param(io, int, 0);
392 MODULE_PARM_DESC(io, "I/O address of the SF16MI card (0x284 or 0x384)");
393 module_param(radio_nr, int, 0);
395 static void __exit fmi_cleanup_module(void)
397 video_unregister_device(&fmi_radio);
398 release_region(io, 2);
400 pnp_device_detach(dev);
403 module_init(fmi_init);
404 module_exit(fmi_cleanup_module);