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 <linux/spinlock.h>
21
22#include <linux/version.h>      /* for KERNEL_VERSION MACRO     */
23#define RADIO_VERSION KERNEL_VERSION(0,0,2)
24
25static struct v4l2_queryctrl radio_qctrl[] = {
26	{
27		.id            = V4L2_CID_AUDIO_MUTE,
28		.name          = "Mute",
29		.minimum       = 0,
30		.maximum       = 1,
31		.default_value = 1,
32		.type          = V4L2_CTRL_TYPE_BOOLEAN,
33	},{
34		.id            = V4L2_CID_AUDIO_VOLUME,
35		.name          = "Volume",
36		.minimum       = 0,
37		.maximum       = 65535,
38		.step          = 65535,
39		.default_value = 0xff,
40		.type          = V4L2_CTRL_TYPE_INTEGER,
41	}
42};
43
44#ifndef CONFIG_RADIO_RTRACK2_PORT
45#define CONFIG_RADIO_RTRACK2_PORT -1
46#endif
47
48static int io = CONFIG_RADIO_RTRACK2_PORT;
49static int radio_nr = -1;
50static spinlock_t lock;
51
52struct rt_device
53{
54	int port;
55	unsigned long curfreq;
56	int muted;
57};
58
59
60/* local things */
61
62static void rt_mute(struct rt_device *dev)
63{
64	if(dev->muted)
65		return;
66	spin_lock(&lock);
67	outb(1, io);
68	spin_unlock(&lock);
69	dev->muted = 1;
70}
71
72static void rt_unmute(struct rt_device *dev)
73{
74	if(dev->muted == 0)
75		return;
76	spin_lock(&lock);
77	outb(0, io);
78	spin_unlock(&lock);
79	dev->muted = 0;
80}
81
82static void zero(void)
83{
84	outb_p(1, io);
85	outb_p(3, io);
86	outb_p(1, io);
87}
88
89static void one(void)
90{
91	outb_p(5, io);
92	outb_p(7, io);
93	outb_p(5, io);
94}
95
96static int rt_setfreq(struct rt_device *dev, unsigned long freq)
97{
98	int i;
99
100	freq = freq / 200 + 856;
101
102	spin_lock(&lock);
103
104	outb_p(0xc8, io);
105	outb_p(0xc9, io);
106	outb_p(0xc9, io);
107
108	for (i = 0; i < 10; i++)
109		zero ();
110
111	for (i = 14; i >= 0; i--)
112		if (freq & (1 << i))
113			one ();
114		else
115			zero ();
116
117	outb_p(0xc8, io);
118	if (!dev->muted)
119		outb_p(0, io);
120
121	spin_unlock(&lock);
122	return 0;
123}
124
125static int vidioc_querycap(struct file *file, void *priv,
126				struct v4l2_capability *v)
127{
128	strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
129	strlcpy(v->card, "RadioTrack II", sizeof(v->card));
130	sprintf(v->bus_info, "ISA");
131	v->version = RADIO_VERSION;
132	v->capabilities = V4L2_CAP_TUNER;
133	return 0;
134}
135
136static int vidioc_s_tuner(struct file *file, void *priv,
137				struct v4l2_tuner *v)
138{
139	if (v->index > 0)
140		return -EINVAL;
141
142	return 0;
143}
144
145static int rt_getsigstr(struct rt_device *dev)
146{
147	if (inb(io) & 2)	/* bit set = no signal present	*/
148		return 0;
149	return 1;		/* signal present		*/
150}
151
152static int vidioc_g_tuner(struct file *file, void *priv,
153				struct v4l2_tuner *v)
154{
155	struct video_device *dev = video_devdata(file);
156	struct rt_device *rt = dev->priv;
157
158	if (v->index > 0)
159		return -EINVAL;
160
161	strcpy(v->name, "FM");
162	v->type = V4L2_TUNER_RADIO;
163	v->rangelow = (88*16000);
164	v->rangehigh = (108*16000);
165	v->rxsubchans = V4L2_TUNER_SUB_MONO;
166	v->capability = V4L2_TUNER_CAP_LOW;
167	v->audmode = V4L2_TUNER_MODE_MONO;
168	v->signal = 0xFFFF*rt_getsigstr(rt);
169	return 0;
170}
171
172static int vidioc_s_frequency(struct file *file, void *priv,
173				struct v4l2_frequency *f)
174{
175	struct video_device *dev = video_devdata(file);
176	struct rt_device *rt = dev->priv;
177
178	rt->curfreq = f->frequency;
179	rt_setfreq(rt, rt->curfreq);
180	return 0;
181}
182
183static int vidioc_g_frequency(struct file *file, void *priv,
184				struct v4l2_frequency *f)
185{
186	struct video_device *dev = video_devdata(file);
187	struct rt_device *rt = dev->priv;
188
189	f->type = V4L2_TUNER_RADIO;
190	f->frequency = rt->curfreq;
191	return 0;
192}
193
194static int vidioc_queryctrl(struct file *file, void *priv,
195				struct v4l2_queryctrl *qc)
196{
197	int i;
198
199	for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
200		if (qc->id && qc->id == radio_qctrl[i].id) {
201			memcpy(qc, &(radio_qctrl[i]),
202						sizeof(*qc));
203			return 0;
204		}
205	}
206	return -EINVAL;
207}
208
209static int vidioc_g_ctrl(struct file *file, void *priv,
210				struct v4l2_control *ctrl)
211{
212	struct video_device *dev = video_devdata(file);
213	struct rt_device *rt = dev->priv;
214
215	switch (ctrl->id) {
216	case V4L2_CID_AUDIO_MUTE:
217		ctrl->value = rt->muted;
218		return 0;
219	case V4L2_CID_AUDIO_VOLUME:
220		if (rt->muted)
221			ctrl->value = 0;
222		else
223			ctrl->value = 65535;
224		return 0;
225	}
226	return -EINVAL;
227}
228
229static int vidioc_s_ctrl(struct file *file, void *priv,
230				struct v4l2_control *ctrl)
231{
232	struct video_device *dev = video_devdata(file);
233	struct rt_device *rt = dev->priv;
234
235	switch (ctrl->id) {
236	case V4L2_CID_AUDIO_MUTE:
237		if (ctrl->value)
238			rt_mute(rt);
239		else
240			rt_unmute(rt);
241		return 0;
242	case V4L2_CID_AUDIO_VOLUME:
243		if (ctrl->value)
244			rt_unmute(rt);
245		else
246			rt_mute(rt);
247		return 0;
248	}
249	return -EINVAL;
250}
251
252static int vidioc_g_audio(struct file *file, void *priv,
253				struct v4l2_audio *a)
254{
255	if (a->index > 1)
256		return -EINVAL;
257
258	strcpy(a->name, "Radio");
259	a->capability = V4L2_AUDCAP_STEREO;
260	return 0;
261}
262
263static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
264{
265	*i = 0;
266	return 0;
267}
268
269static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
270{
271	if (i != 0)
272		return -EINVAL;
273	return 0;
274}
275
276static int vidioc_s_audio(struct file *file, void *priv,
277				struct v4l2_audio *a)
278{
279	if (a->index != 0)
280		return -EINVAL;
281	return 0;
282}
283
284static struct rt_device rtrack2_unit;
285
286static const struct file_operations rtrack2_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,
292	.llseek         = no_llseek,
293};
294
295static struct video_device rtrack2_radio=
296{
297	.owner		= THIS_MODULE,
298	.name		= "RadioTrack II radio",
299	.type		= VID_TYPE_TUNER,
300	.hardware	= 0,
301	.fops           = &rtrack2_fops,
302	.vidioc_querycap    = vidioc_querycap,
303	.vidioc_g_tuner     = vidioc_g_tuner,
304	.vidioc_s_tuner     = vidioc_s_tuner,
305	.vidioc_g_frequency = vidioc_g_frequency,
306	.vidioc_s_frequency = vidioc_s_frequency,
307	.vidioc_queryctrl   = vidioc_queryctrl,
308	.vidioc_g_ctrl      = vidioc_g_ctrl,
309	.vidioc_s_ctrl      = vidioc_s_ctrl,
310	.vidioc_g_audio     = vidioc_g_audio,
311	.vidioc_s_audio     = vidioc_s_audio,
312	.vidioc_g_input     = vidioc_g_input,
313	.vidioc_s_input     = vidioc_s_input,
314};
315
316static int __init rtrack2_init(void)
317{
318	if(io==-1)
319	{
320		printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
321		return -EINVAL;
322	}
323	if (!request_region(io, 4, "rtrack2"))
324	{
325		printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
326		return -EBUSY;
327	}
328
329	rtrack2_radio.priv=&rtrack2_unit;
330
331	spin_lock_init(&lock);
332	if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
333	{
334		release_region(io, 4);
335		return -EINVAL;
336	}
337
338	printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
339
340	/* mute card - prevents noisy bootups */
341	outb(1, io);
342	rtrack2_unit.muted = 1;
343
344	return 0;
345}
346
347MODULE_AUTHOR("Ben Pfaff");
348MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
349MODULE_LICENSE("GPL");
350
351module_param(io, int, 0);
352MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
353module_param(radio_nr, int, 0);
354
355static void __exit rtrack2_cleanup_module(void)
356{
357	video_unregister_device(&rtrack2_radio);
358	release_region(io,4);
359}
360
361module_init(rtrack2_init);
362module_exit(rtrack2_cleanup_module);
363
364/*
365  Local variables:
366  compile-command: "mmake"
367  End:
368*/
369