4234f7ed0fc36920cdc16b0476a3aaf06aa0358c
[linux-2.6.git] / 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 <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
26 static 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
49 static int io = CONFIG_RADIO_RTRACK2_PORT;
50 static int radio_nr = -1;
51 static spinlock_t lock;
52
53 struct rt_device
54 {
55         unsigned long in_use;
56         int port;
57         unsigned long curfreq;
58         int muted;
59 };
60
61
62 /* local things */
63
64 static void rt_mute(struct rt_device *dev)
65 {
66         if(dev->muted)
67                 return;
68         spin_lock(&lock);
69         outb(1, io);
70         spin_unlock(&lock);
71         dev->muted = 1;
72 }
73
74 static void rt_unmute(struct rt_device *dev)
75 {
76         if(dev->muted == 0)
77                 return;
78         spin_lock(&lock);
79         outb(0, io);
80         spin_unlock(&lock);
81         dev->muted = 0;
82 }
83
84 static void zero(void)
85 {
86         outb_p(1, io);
87         outb_p(3, io);
88         outb_p(1, io);
89 }
90
91 static void one(void)
92 {
93         outb_p(5, io);
94         outb_p(7, io);
95         outb_p(5, io);
96 }
97
98 static int rt_setfreq(struct rt_device *dev, unsigned long freq)
99 {
100         int i;
101
102         freq = freq / 200 + 856;
103
104         spin_lock(&lock);
105
106         outb_p(0xc8, io);
107         outb_p(0xc9, io);
108         outb_p(0xc9, io);
109
110         for (i = 0; i < 10; i++)
111                 zero ();
112
113         for (i = 14; i >= 0; i--)
114                 if (freq & (1 << i))
115                         one ();
116                 else
117                         zero ();
118
119         outb_p(0xc8, io);
120         if (!dev->muted)
121                 outb_p(0, io);
122
123         spin_unlock(&lock);
124         return 0;
125 }
126
127 static int vidioc_querycap(struct file *file, void *priv,
128                                 struct v4l2_capability *v)
129 {
130         strlcpy(v->driver, "radio-rtrack2", sizeof(v->driver));
131         strlcpy(v->card, "RadioTrack II", sizeof(v->card));
132         sprintf(v->bus_info, "ISA");
133         v->version = RADIO_VERSION;
134         v->capabilities = V4L2_CAP_TUNER;
135         return 0;
136 }
137
138 static int vidioc_s_tuner(struct file *file, void *priv,
139                                 struct v4l2_tuner *v)
140 {
141         if (v->index > 0)
142                 return -EINVAL;
143
144         return 0;
145 }
146
147 static int rt_getsigstr(struct rt_device *dev)
148 {
149         if (inb(io) & 2)        /* bit set = no signal present  */
150                 return 0;
151         return 1;               /* signal present               */
152 }
153
154 static int vidioc_g_tuner(struct file *file, void *priv,
155                                 struct v4l2_tuner *v)
156 {
157         struct video_device *dev = video_devdata(file);
158         struct rt_device *rt = video_get_drvdata(dev);
159
160         if (v->index > 0)
161                 return -EINVAL;
162
163         strcpy(v->name, "FM");
164         v->type = V4L2_TUNER_RADIO;
165         v->rangelow = (88*16000);
166         v->rangehigh = (108*16000);
167         v->rxsubchans = V4L2_TUNER_SUB_MONO;
168         v->capability = V4L2_TUNER_CAP_LOW;
169         v->audmode = V4L2_TUNER_MODE_MONO;
170         v->signal = 0xFFFF*rt_getsigstr(rt);
171         return 0;
172 }
173
174 static int vidioc_s_frequency(struct file *file, void *priv,
175                                 struct v4l2_frequency *f)
176 {
177         struct video_device *dev = video_devdata(file);
178         struct rt_device *rt = video_get_drvdata(dev);
179
180         rt->curfreq = f->frequency;
181         rt_setfreq(rt, rt->curfreq);
182         return 0;
183 }
184
185 static int vidioc_g_frequency(struct file *file, void *priv,
186                                 struct v4l2_frequency *f)
187 {
188         struct video_device *dev = video_devdata(file);
189         struct rt_device *rt = video_get_drvdata(dev);
190
191         f->type = V4L2_TUNER_RADIO;
192         f->frequency = rt->curfreq;
193         return 0;
194 }
195
196 static int vidioc_queryctrl(struct file *file, void *priv,
197                                 struct v4l2_queryctrl *qc)
198 {
199         int i;
200
201         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
202                 if (qc->id && qc->id == radio_qctrl[i].id) {
203                         memcpy(qc, &(radio_qctrl[i]),
204                                                 sizeof(*qc));
205                         return 0;
206                 }
207         }
208         return -EINVAL;
209 }
210
211 static int vidioc_g_ctrl(struct file *file, void *priv,
212                                 struct v4l2_control *ctrl)
213 {
214         struct video_device *dev = video_devdata(file);
215         struct rt_device *rt = video_get_drvdata(dev);
216
217         switch (ctrl->id) {
218         case V4L2_CID_AUDIO_MUTE:
219                 ctrl->value = rt->muted;
220                 return 0;
221         case V4L2_CID_AUDIO_VOLUME:
222                 if (rt->muted)
223                         ctrl->value = 0;
224                 else
225                         ctrl->value = 65535;
226                 return 0;
227         }
228         return -EINVAL;
229 }
230
231 static int vidioc_s_ctrl(struct file *file, void *priv,
232                                 struct v4l2_control *ctrl)
233 {
234         struct video_device *dev = video_devdata(file);
235         struct rt_device *rt = video_get_drvdata(dev);
236
237         switch (ctrl->id) {
238         case V4L2_CID_AUDIO_MUTE:
239                 if (ctrl->value)
240                         rt_mute(rt);
241                 else
242                         rt_unmute(rt);
243                 return 0;
244         case V4L2_CID_AUDIO_VOLUME:
245                 if (ctrl->value)
246                         rt_unmute(rt);
247                 else
248                         rt_mute(rt);
249                 return 0;
250         }
251         return -EINVAL;
252 }
253
254 static int vidioc_g_audio(struct file *file, void *priv,
255                                 struct v4l2_audio *a)
256 {
257         if (a->index > 1)
258                 return -EINVAL;
259
260         strcpy(a->name, "Radio");
261         a->capability = V4L2_AUDCAP_STEREO;
262         return 0;
263 }
264
265 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
266 {
267         *i = 0;
268         return 0;
269 }
270
271 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
272 {
273         if (i != 0)
274                 return -EINVAL;
275         return 0;
276 }
277
278 static int vidioc_s_audio(struct file *file, void *priv,
279                                 struct v4l2_audio *a)
280 {
281         if (a->index != 0)
282                 return -EINVAL;
283         return 0;
284 }
285
286 static struct rt_device rtrack2_unit;
287
288 static int rtrack2_exclusive_open(struct inode *inode, struct file *file)
289 {
290         return test_and_set_bit(0, &rtrack2_unit.in_use) ? -EBUSY : 0;
291 }
292
293 static int rtrack2_exclusive_release(struct inode *inode, struct file *file)
294 {
295         clear_bit(0, &rtrack2_unit.in_use);
296         return 0;
297 }
298
299 static const struct file_operations rtrack2_fops = {
300         .owner          = THIS_MODULE,
301         .open           = rtrack2_exclusive_open,
302         .release        = rtrack2_exclusive_release,
303         .ioctl          = video_ioctl2,
304 #ifdef CONFIG_COMPAT
305         .compat_ioctl   = v4l_compat_ioctl32,
306 #endif
307         .llseek         = no_llseek,
308 };
309
310 static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
311         .vidioc_querycap    = vidioc_querycap,
312         .vidioc_g_tuner     = vidioc_g_tuner,
313         .vidioc_s_tuner     = vidioc_s_tuner,
314         .vidioc_g_frequency = vidioc_g_frequency,
315         .vidioc_s_frequency = vidioc_s_frequency,
316         .vidioc_queryctrl   = vidioc_queryctrl,
317         .vidioc_g_ctrl      = vidioc_g_ctrl,
318         .vidioc_s_ctrl      = vidioc_s_ctrl,
319         .vidioc_g_audio     = vidioc_g_audio,
320         .vidioc_s_audio     = vidioc_s_audio,
321         .vidioc_g_input     = vidioc_g_input,
322         .vidioc_s_input     = vidioc_s_input,
323 };
324
325 static struct video_device rtrack2_radio = {
326         .name           = "RadioTrack II radio",
327         .fops           = &rtrack2_fops,
328         .ioctl_ops      = &rtrack2_ioctl_ops,
329         .release        = video_device_release_empty,
330 };
331
332 static int __init rtrack2_init(void)
333 {
334         if(io==-1)
335         {
336                 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
337                 return -EINVAL;
338         }
339         if (!request_region(io, 4, "rtrack2"))
340         {
341                 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
342                 return -EBUSY;
343         }
344
345         video_set_drvdata(&rtrack2_radio, &rtrack2_unit);
346
347         spin_lock_init(&lock);
348         if (video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
349                 release_region(io, 4);
350                 return -EINVAL;
351         }
352
353         printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
354
355         /* mute card - prevents noisy bootups */
356         outb(1, io);
357         rtrack2_unit.muted = 1;
358
359         return 0;
360 }
361
362 MODULE_AUTHOR("Ben Pfaff");
363 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
364 MODULE_LICENSE("GPL");
365
366 module_param(io, int, 0);
367 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
368 module_param(radio_nr, int, 0);
369
370 static void __exit rtrack2_cleanup_module(void)
371 {
372         video_unregister_device(&rtrack2_radio);
373         release_region(io,4);
374 }
375
376 module_init(rtrack2_init);
377 module_exit(rtrack2_cleanup_module);
378
379 /*
380   Local variables:
381   compile-command: "mmake"
382   End:
383 */