radio-rtrack2.c revision 0ea6bc8d43c9ee3c5384bea184eab020927a5b2c 
1/* RadioTrack II driver for Linux radio support (C) 1998 Ben Pfaff
2 *
3 * Based on RadioTrack I/RadioReveal (C) 1997 M. Kirkwood
4 * Converted to new API by Alan Cox <Alan.Cox@linux.org>
5 * Various bugfixes and enhancements by Russell Kroll <rkroll@exploits.org>
6 *
7 * TODO: Allow for more than one of these foolish entities :-)
8 *
9 * Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
10 */
11
12#include <linux/module.h>	/* Modules 			*/
13#include <linux/init.h>		/* Initdata			*/
14#include <linux/ioport.h>	/* request_region		*/
15#include <linux/delay.h>	/* udelay			*/
16#include <asm/io.h>		/* outb, outb_p			*/
17#include <asm/uaccess.h>	/* copy to/from user		*/
18#include <linux/videodev2.h>	/* kernel radio structs		*/
19#include <media/v4l2-common.h>
20#include <media/v4l2-ioctl.h>
21#include <linux/spinlock.h>
22
23#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
24#define RADIO_VERSION KERNEL_VERSION(0,0,2)
25
26static struct v4l2_queryctrl radio_qctrl[] = {
27	{
28		.id            = V4L2_CID_AUDIO_MUTE,
29		.name          = "Mute",
30		.minimum       = 0,
31		.maximum       = 1,
32		.default_value = 1,
33		.type          = V4L2_CTRL_TYPE_BOOLEAN,
34	},{
35		.id            = V4L2_CID_AUDIO_VOLUME,
36		.name          = "Volume",
37		.minimum       = 0,
38		.maximum       = 65535,
39		.step          = 65535,
40		.default_value = 0xff,
41		.type          = V4L2_CTRL_TYPE_INTEGER,
42	}
43};
44
45#ifndef CONFIG_RADIO_RTRACK2_PORT
46#define CONFIG_RADIO_RTRACK2_PORT -1
47#endif
48
49static int io = CONFIG_RADIO_RTRACK2_PORT;
50static int radio_nr = -1;
51static spinlock_t lock;
52
53struct rt_device
54{
55	int port;
56	unsigned long curfreq;
57	int muted;
58};
59
60
61/* local things */
62
63static void rt_mute(struct rt_device *dev)
64{
65	if(dev->muted)
66		return;
67	spin_lock(&lock);
68	outb(1, io);
69	spin_unlock(&lock);
70	dev->muted = 1;
71}
72
73static void rt_unmute(struct rt_device *dev)
74{
75	if(dev->muted == 0)
76		return;
77	spin_lock(&lock);
78	outb(0, io);
79	spin_unlock(&lock);
80	dev->muted = 0;
81}
82
83static void zero(void)
84{
85	outb_p(1, io);
86	outb_p(3, io);
87	outb_p(1, io);
88}
89
90static void one(void)
91{
92	outb_p(5, io);
93	outb_p(7, io);
94	outb_p(5, io);
95}
96
97static int rt_setfreq(struct rt_device *dev, unsigned long freq)
98{
99	int i;
100
101	freq = freq / 200 + 856;
102
103	spin_lock(&lock);
104
105	outb_p(0xc8, io);
106	outb_p(0xc9, io);
107	outb_p(0xc9, io);
108
109	for (i = 0; i < 10; i++)
110		zero ();
111
112	for (i = 14; i >= 0; i--)
113		if (freq & (1 << i))
114			one ();
115		else
116			zero ();
117
118	outb_p(0xc8, io);
119	if (!dev->muted)
120		outb_p(0, io);
121
122	spin_unlock(&lock);
123	return 0;
124}
125
126static int vidioc_querycap(struct file *file, void *priv,
127				struct v4l2_capability *v)
128{
129	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
130	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
131	sprintf(v->bus_info, "ISA");
132	v->version = RADIO_VERSION;
133	v->capabilities = V4L2_CAP_TUNER;
134	return 0;
135}
136
137static int vidioc_s_tuner(struct file *file, void *priv,
138				struct v4l2_tuner *v)
139{
140	if (v->index > 0)
141		return -EINVAL;
142
143	return 0;
144}
145
146static int rt_getsigstr(struct rt_device *dev)
147{
148	if (inb(io) & 2)	/* bit set = no signal present	*/
149		return 0;
150	return 1;		/* signal present		*/
151}
152
153static int vidioc_g_tuner(struct file *file, void *priv,
154				struct v4l2_tuner *v)
155{
156	struct video_device *dev = video_devdata(file);
157	struct rt_device *rt = dev->priv;
158
159	if (v->index > 0)
160		return -EINVAL;
161
162	strcpy(v->name, "FM");
163	v->type = V4L2_TUNER_RADIO;
164	v->rangelow = (88*16000);
165	v->rangehigh = (108*16000);
166	v->rxsubchans = V4L2_TUNER_SUB_MONO;
167	v->capability = V4L2_TUNER_CAP_LOW;
168	v->audmode = V4L2_TUNER_MODE_MONO;
169	v->signal = 0xFFFF*rt_getsigstr(rt);
170	return 0;
171}
172
173static int vidioc_s_frequency(struct file *file, void *priv,
174				struct v4l2_frequency *f)
175{
176	struct video_device *dev = video_devdata(file);
177	struct rt_device *rt = dev->priv;
178
179	rt->curfreq = f->frequency;
180	rt_setfreq(rt, rt->curfreq);
181	return 0;
182}
183
184static int vidioc_g_frequency(struct file *file, void *priv,
185				struct v4l2_frequency *f)
186{
187	struct video_device *dev = video_devdata(file);
188	struct rt_device *rt = dev->priv;
189
190	f->type = V4L2_TUNER_RADIO;
191	f->frequency = rt->curfreq;
192	return 0;
193}
194
195static int vidioc_queryctrl(struct file *file, void *priv,
196				struct v4l2_queryctrl *qc)
197{
198	int i;
199
200	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
201		if (qc->id && qc->id == radio_qctrl[i].id) {
202			memcpy(qc, &(radio_qctrl[i]),
203						sizeof(*qc));
204			return 0;
205		}
206	}
207	return -EINVAL;
208}
209
210static int vidioc_g_ctrl(struct file *file, void *priv,
211				struct v4l2_control *ctrl)
212{
213	struct video_device *dev = video_devdata(file);
214	struct rt_device *rt = dev->priv;
215
216	switch (ctrl->id) {
217	case V4L2_CID_AUDIO_MUTE:
218		ctrl->value = rt->muted;
219		return 0;
220	case V4L2_CID_AUDIO_VOLUME:
221		if (rt->muted)
222			ctrl->value = 0;
223		else
224			ctrl->value = 65535;
225		return 0;
226	}
227	return -EINVAL;
228}
229
230static int vidioc_s_ctrl(struct file *file, void *priv,
231				struct v4l2_control *ctrl)
232{
233	struct video_device *dev = video_devdata(file);
234	struct rt_device *rt = dev->priv;
235
236	switch (ctrl->id) {
237	case V4L2_CID_AUDIO_MUTE:
238		if (ctrl->value)
239			rt_mute(rt);
240		else
241			rt_unmute(rt);
242		return 0;
243	case V4L2_CID_AUDIO_VOLUME:
244		if (ctrl->value)
245			rt_unmute(rt);
246		else
247			rt_mute(rt);
248		return 0;
249	}
250	return -EINVAL;
251}
252
253static int vidioc_g_audio(struct file *file, void *priv,
254				struct v4l2_audio *a)
255{
256	if (a->index > 1)
257		return -EINVAL;
258
259	strcpy(a->name, "Radio");
260	a->capability = V4L2_AUDCAP_STEREO;
261	return 0;
262}
263
264static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
265{
266	*i = 0;
267	return 0;
268}
269
270static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
271{
272	if (i != 0)
273		return -EINVAL;
274	return 0;
275}
276
277static int vidioc_s_audio(struct file *file, void *priv,
278				struct v4l2_audio *a)
279{
280	if (a->index != 0)
281		return -EINVAL;
282	return 0;
283}
284
285static struct rt_device rtrack2_unit;
286
287static const struct file_operations rtrack2_fops = {
288	.owner		= THIS_MODULE,
289	.open           = video_exclusive_open,
290	.release        = video_exclusive_release,
291	.ioctl		= video_ioctl2,
292#ifdef CONFIG_COMPAT
293	.compat_ioctl	= v4l_compat_ioctl32,
294#endif
295	.llseek         = no_llseek,
296};
297
298static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
299	.vidioc_querycap    = vidioc_querycap,
300	.vidioc_g_tuner     = vidioc_g_tuner,
301	.vidioc_s_tuner     = vidioc_s_tuner,
302	.vidioc_g_frequency = vidioc_g_frequency,
303	.vidioc_s_frequency = vidioc_s_frequency,
304	.vidioc_queryctrl   = vidioc_queryctrl,
305	.vidioc_g_ctrl      = vidioc_g_ctrl,
306	.vidioc_s_ctrl      = vidioc_s_ctrl,
307	.vidioc_g_audio     = vidioc_g_audio,
308	.vidioc_s_audio     = vidioc_s_audio,
309	.vidioc_g_input     = vidioc_g_input,
310	.vidioc_s_input     = vidioc_s_input,
311};
312
313static struct video_device rtrack2_radio = {
314	.name		= "RadioTrack II radio",
315	.fops           = &rtrack2_fops,
316	.ioctl_ops 	= &rtrack2_ioctl_ops,
317};
318
319static int __init rtrack2_init(void)
320{
321	if(io==-1)
322	{
323		printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
324		return -EINVAL;
325	}
326	if (!request_region(io, 4, "rtrack2"))
327	{
328		printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
329		return -EBUSY;
330	}
331
332	rtrack2_radio.priv=&rtrack2_unit;
333
334	spin_lock_init(&lock);
335	if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
336	{
337		release_region(io, 4);
338		return -EINVAL;
339	}
340
341	printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
342
343	/* mute card - prevents noisy bootups */
344	outb(1, io);
345	rtrack2_unit.muted = 1;
346
347	return 0;
348}
349
350MODULE_AUTHOR("Ben Pfaff");
351MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
352MODULE_LICENSE("GPL");
353
354module_param(io, int, 0);
355MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
356module_param(radio_nr, int, 0);
357
358static void __exit rtrack2_cleanup_module(void)
359{
360	video_unregister_device(&rtrack2_radio);
361	release_region(io,4);
362}
363
364module_init(rtrack2_init);
365module_exit(rtrack2_cleanup_module);
366
367/*
368  Local variables:
369  compile-command: "mmake"
370  End:
371*/
372