Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
[linux-2.6] / drivers / media / radio / radio-rtrack2.c
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  */
10
11 #include <linux/module.h>       /* Modules                      */
12 #include <linux/init.h>         /* Initdata                     */
13 #include <linux/ioport.h>       /* request_region               */
14 #include <linux/delay.h>        /* udelay                       */
15 #include <asm/io.h>             /* outb, outb_p                 */
16 #include <asm/uaccess.h>        /* copy to/from user            */
17 #include <linux/videodev.h>     /* kernel radio structs         */
18 #include <media/v4l2-common.h>
19 #include <linux/config.h>       /* CONFIG_RADIO_RTRACK2_PORT    */
20 #include <linux/spinlock.h>
21
22 #ifndef CONFIG_RADIO_RTRACK2_PORT
23 #define CONFIG_RADIO_RTRACK2_PORT -1
24 #endif
25
26 static int io = CONFIG_RADIO_RTRACK2_PORT;
27 static int radio_nr = -1;
28 static spinlock_t lock;
29
30 struct rt_device
31 {
32         int port;
33         unsigned long curfreq;
34         int muted;
35 };
36
37
38 /* local things */
39
40 static void rt_mute(struct rt_device *dev)
41 {
42         if(dev->muted)
43                 return;
44         spin_lock(&lock);
45         outb(1, io);
46         spin_unlock(&lock);
47         dev->muted = 1;
48 }
49
50 static void rt_unmute(struct rt_device *dev)
51 {
52         if(dev->muted == 0)
53                 return;
54         spin_lock(&lock);
55         outb(0, io);
56         spin_unlock(&lock);
57         dev->muted = 0;
58 }
59
60 static void zero(void)
61 {
62         outb_p(1, io);
63         outb_p(3, io);
64         outb_p(1, io);
65 }
66
67 static void one(void)
68 {
69         outb_p(5, io);
70         outb_p(7, io);
71         outb_p(5, io);
72 }
73
74 static int rt_setfreq(struct rt_device *dev, unsigned long freq)
75 {
76         int i;
77
78         freq = freq / 200 + 856;
79
80         spin_lock(&lock);
81
82         outb_p(0xc8, io);
83         outb_p(0xc9, io);
84         outb_p(0xc9, io);
85
86         for (i = 0; i < 10; i++)
87                 zero ();
88
89         for (i = 14; i >= 0; i--)
90                 if (freq & (1 << i))
91                         one ();
92                 else
93                         zero ();
94
95         outb_p(0xc8, io);
96         if (!dev->muted)
97                 outb_p(0, io);
98
99         spin_unlock(&lock);
100         return 0;
101 }
102
103 static int rt_getsigstr(struct rt_device *dev)
104 {
105         if (inb(io) & 2)        /* bit set = no signal present  */
106                 return 0;
107         return 1;               /* signal present               */
108 }
109
110 static int rt_do_ioctl(struct inode *inode, struct file *file,
111                        unsigned int cmd, void *arg)
112 {
113         struct video_device *dev = video_devdata(file);
114         struct rt_device *rt=dev->priv;
115
116         switch(cmd)
117         {
118                 case VIDIOCGCAP:
119                 {
120                         struct video_capability *v = arg;
121                         memset(v,0,sizeof(*v));
122                         v->type=VID_TYPE_TUNER;
123                         v->channels=1;
124                         v->audios=1;
125                         strcpy(v->name, "RadioTrack II");
126                         return 0;
127                 }
128                 case VIDIOCGTUNER:
129                 {
130                         struct video_tuner *v = arg;
131                         if(v->tuner)    /* Only 1 tuner */
132                                 return -EINVAL;
133                         v->rangelow=88*16000;
134                         v->rangehigh=108*16000;
135                         v->flags=VIDEO_TUNER_LOW;
136                         v->mode=VIDEO_MODE_AUTO;
137                         v->signal=0xFFFF*rt_getsigstr(rt);
138                         strcpy(v->name, "FM");
139                         return 0;
140                 }
141                 case VIDIOCSTUNER:
142                 {
143                         struct video_tuner *v = arg;
144                         if(v->tuner!=0)
145                                 return -EINVAL;
146                         /* Only 1 tuner so no setting needed ! */
147                         return 0;
148                 }
149                 case VIDIOCGFREQ:
150                 {
151                         unsigned long *freq = arg;
152                         *freq = rt->curfreq;
153                         return 0;
154                 }
155                 case VIDIOCSFREQ:
156                 {
157                         unsigned long *freq = arg;
158                         rt->curfreq = *freq;
159                         rt_setfreq(rt, rt->curfreq);
160                         return 0;
161                 }
162                 case VIDIOCGAUDIO:
163                 {
164                         struct video_audio *v = arg;
165                         memset(v,0, sizeof(*v));
166                         v->flags|=VIDEO_AUDIO_MUTABLE;
167                         v->volume=1;
168                         v->step=65535;
169                         strcpy(v->name, "Radio");
170                         return 0;
171                 }
172                 case VIDIOCSAUDIO:
173                 {
174                         struct video_audio *v = arg;
175                         if(v->audio)
176                                 return -EINVAL;
177
178                         if(v->flags&VIDEO_AUDIO_MUTE)
179                                 rt_mute(rt);
180                         else
181                                 rt_unmute(rt);
182
183                         return 0;
184                 }
185                 default:
186                         return -ENOIOCTLCMD;
187         }
188 }
189
190 static int rt_ioctl(struct inode *inode, struct file *file,
191                     unsigned int cmd, unsigned long arg)
192 {
193         return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
194 }
195
196 static struct rt_device rtrack2_unit;
197
198 static struct file_operations rtrack2_fops = {
199         .owner          = THIS_MODULE,
200         .open           = video_exclusive_open,
201         .release        = video_exclusive_release,
202         .ioctl          = rt_ioctl,
203         .compat_ioctl   = v4l_compat_ioctl32,
204         .llseek         = no_llseek,
205 };
206
207 static struct video_device rtrack2_radio=
208 {
209         .owner          = THIS_MODULE,
210         .name           = "RadioTrack II radio",
211         .type           = VID_TYPE_TUNER,
212         .hardware       = VID_HARDWARE_RTRACK2,
213         .fops           = &rtrack2_fops,
214 };
215
216 static int __init rtrack2_init(void)
217 {
218         if(io==-1)
219         {
220                 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
221                 return -EINVAL;
222         }
223         if (!request_region(io, 4, "rtrack2"))
224         {
225                 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
226                 return -EBUSY;
227         }
228
229         rtrack2_radio.priv=&rtrack2_unit;
230
231         spin_lock_init(&lock);
232         if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
233         {
234                 release_region(io, 4);
235                 return -EINVAL;
236         }
237
238         printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
239
240         /* mute card - prevents noisy bootups */
241         outb(1, io);
242         rtrack2_unit.muted = 1;
243
244         return 0;
245 }
246
247 MODULE_AUTHOR("Ben Pfaff");
248 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
249 MODULE_LICENSE("GPL");
250
251 module_param(io, int, 0);
252 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
253 module_param(radio_nr, int, 0);
254
255 static void __exit rtrack2_cleanup_module(void)
256 {
257         video_unregister_device(&rtrack2_radio);
258         release_region(io,4);
259 }
260
261 module_init(rtrack2_init);
262 module_exit(rtrack2_cleanup_module);
263
264 /*
265   Local variables:
266   compile-command: "mmake"
267   End:
268 */