Merge ../linus
[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  * 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
25 static 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
48 static int io = CONFIG_RADIO_RTRACK2_PORT;
49 static int radio_nr = -1;
50 static spinlock_t lock;
51
52 struct rt_device
53 {
54         int port;
55         unsigned long curfreq;
56         int muted;
57 };
58
59
60 /* local things */
61
62 static 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
72 static 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
82 static void zero(void)
83 {
84         outb_p(1, io);
85         outb_p(3, io);
86         outb_p(1, io);
87 }
88
89 static void one(void)
90 {
91         outb_p(5, io);
92         outb_p(7, io);
93         outb_p(5, io);
94 }
95
96 static 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
125 static int rt_getsigstr(struct rt_device *dev)
126 {
127         if (inb(io) & 2)        /* bit set = no signal present  */
128                 return 0;
129         return 1;               /* signal present               */
130 }
131
132 static int rt_do_ioctl(struct inode *inode, struct file *file,
133                        unsigned int cmd, void *arg)
134 {
135         struct video_device *dev = video_devdata(file);
136         struct rt_device *rt=dev->priv;
137
138         switch(cmd)
139         {
140                 case VIDIOC_QUERYCAP:
141                 {
142                         struct v4l2_capability *v = arg;
143                         memset(v,0,sizeof(*v));
144                         strlcpy(v->driver, "radio-rtrack2", sizeof (v->driver));
145                         strlcpy(v->card, "RadioTrack II", sizeof (v->card));
146                         sprintf(v->bus_info,"ISA");
147                         v->version = RADIO_VERSION;
148                         v->capabilities = V4L2_CAP_TUNER;
149
150                         return 0;
151                 }
152                 case VIDIOC_G_TUNER:
153                 {
154                         struct v4l2_tuner *v = arg;
155
156                         if (v->index > 0)
157                                 return -EINVAL;
158
159                         memset(v,0,sizeof(*v));
160                         strcpy(v->name, "FM");
161                         v->type = V4L2_TUNER_RADIO;
162
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
170                         return 0;
171                 }
172                 case VIDIOC_S_TUNER:
173                 {
174                         struct v4l2_tuner *v = arg;
175
176                         if (v->index > 0)
177                                 return -EINVAL;
178
179                         return 0;
180                 }
181                 case VIDIOC_S_FREQUENCY:
182                 {
183                         struct v4l2_frequency *f = arg;
184
185                         rt->curfreq = f->frequency;
186                         rt_setfreq(rt, rt->curfreq);
187                         return 0;
188                 }
189                 case VIDIOC_G_FREQUENCY:
190                 {
191                         struct v4l2_frequency *f = arg;
192
193                         f->type = V4L2_TUNER_RADIO;
194                         f->frequency = rt->curfreq;
195
196                         return 0;
197                 }
198                 case VIDIOC_QUERYCTRL:
199                 {
200                         struct v4l2_queryctrl *qc = arg;
201                         int i;
202
203                         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
204                                 if (qc->id && qc->id == radio_qctrl[i].id) {
205                                         memcpy(qc, &(radio_qctrl[i]),
206                                                                 sizeof(*qc));
207                                         return (0);
208                                 }
209                         }
210                         return -EINVAL;
211                 }
212                 case VIDIOC_G_CTRL:
213                 {
214                         struct v4l2_control *ctrl= arg;
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                 case VIDIOC_S_CTRL:
230                 {
231                         struct v4l2_control *ctrl= arg;
232
233                         switch (ctrl->id) {
234                                 case V4L2_CID_AUDIO_MUTE:
235                                         if (ctrl->value) {
236                                                 rt_mute(rt);
237                                         } else {
238                                                 rt_unmute(rt);
239                                         }
240                                         return (0);
241                                 case V4L2_CID_AUDIO_VOLUME:
242                                         if (ctrl->value) {
243                                                 rt_unmute(rt);
244                                         } else {
245                                                 rt_mute(rt);
246                                         }
247                                         return (0);
248                         }
249                         return -EINVAL;
250                 }
251                 default:
252                         return v4l_compat_translate_ioctl(inode,file,cmd,arg,
253                                                           rt_do_ioctl);
254         }
255 }
256
257 static int rt_ioctl(struct inode *inode, struct file *file,
258                     unsigned int cmd, unsigned long arg)
259 {
260         return video_usercopy(inode, file, cmd, arg, rt_do_ioctl);
261 }
262
263 static struct rt_device rtrack2_unit;
264
265 static struct file_operations rtrack2_fops = {
266         .owner          = THIS_MODULE,
267         .open           = video_exclusive_open,
268         .release        = video_exclusive_release,
269         .ioctl          = rt_ioctl,
270         .compat_ioctl   = v4l_compat_ioctl32,
271         .llseek         = no_llseek,
272 };
273
274 static struct video_device rtrack2_radio=
275 {
276         .owner          = THIS_MODULE,
277         .name           = "RadioTrack II radio",
278         .type           = VID_TYPE_TUNER,
279         .hardware       = 0,
280         .fops           = &rtrack2_fops,
281 };
282
283 static int __init rtrack2_init(void)
284 {
285         if(io==-1)
286         {
287                 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
288                 return -EINVAL;
289         }
290         if (!request_region(io, 4, "rtrack2"))
291         {
292                 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
293                 return -EBUSY;
294         }
295
296         rtrack2_radio.priv=&rtrack2_unit;
297
298         spin_lock_init(&lock);
299         if(video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr)==-1)
300         {
301                 release_region(io, 4);
302                 return -EINVAL;
303         }
304
305         printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
306
307         /* mute card - prevents noisy bootups */
308         outb(1, io);
309         rtrack2_unit.muted = 1;
310
311         return 0;
312 }
313
314 MODULE_AUTHOR("Ben Pfaff");
315 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
316 MODULE_LICENSE("GPL");
317
318 module_param(io, int, 0);
319 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
320 module_param(radio_nr, int, 0);
321
322 static void __exit rtrack2_cleanup_module(void)
323 {
324         video_unregister_device(&rtrack2_radio);
325         release_region(io,4);
326 }
327
328 module_init(rtrack2_init);
329 module_exit(rtrack2_cleanup_module);
330
331 /*
332   Local variables:
333   compile-command: "mmake"
334   End:
335 */