V4L/DVB (8788): v4l: replace video_get_drvdata(video_devdata(filp)) with video_drvdat...
[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 rt_device *rt = video_drvdata(file);
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
173 static int vidioc_s_frequency(struct file *file, void *priv,
174                                 struct v4l2_frequency *f)
175 {
176         struct rt_device *rt = video_drvdata(file);
177
178         rt->curfreq = f->frequency;
179         rt_setfreq(rt, rt->curfreq);
180         return 0;
181 }
182
183 static int vidioc_g_frequency(struct file *file, void *priv,
184                                 struct v4l2_frequency *f)
185 {
186         struct rt_device *rt = video_drvdata(file);
187
188         f->type = V4L2_TUNER_RADIO;
189         f->frequency = rt->curfreq;
190         return 0;
191 }
192
193 static int vidioc_queryctrl(struct file *file, void *priv,
194                                 struct v4l2_queryctrl *qc)
195 {
196         int i;
197
198         for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
199                 if (qc->id && qc->id == radio_qctrl[i].id) {
200                         memcpy(qc, &(radio_qctrl[i]),
201                                                 sizeof(*qc));
202                         return 0;
203                 }
204         }
205         return -EINVAL;
206 }
207
208 static int vidioc_g_ctrl(struct file *file, void *priv,
209                                 struct v4l2_control *ctrl)
210 {
211         struct rt_device *rt = video_drvdata(file);
212
213         switch (ctrl->id) {
214         case V4L2_CID_AUDIO_MUTE:
215                 ctrl->value = rt->muted;
216                 return 0;
217         case V4L2_CID_AUDIO_VOLUME:
218                 if (rt->muted)
219                         ctrl->value = 0;
220                 else
221                         ctrl->value = 65535;
222                 return 0;
223         }
224         return -EINVAL;
225 }
226
227 static int vidioc_s_ctrl(struct file *file, void *priv,
228                                 struct v4l2_control *ctrl)
229 {
230         struct rt_device *rt = video_drvdata(file);
231
232         switch (ctrl->id) {
233         case V4L2_CID_AUDIO_MUTE:
234                 if (ctrl->value)
235                         rt_mute(rt);
236                 else
237                         rt_unmute(rt);
238                 return 0;
239         case V4L2_CID_AUDIO_VOLUME:
240                 if (ctrl->value)
241                         rt_unmute(rt);
242                 else
243                         rt_mute(rt);
244                 return 0;
245         }
246         return -EINVAL;
247 }
248
249 static int vidioc_g_audio(struct file *file, void *priv,
250                                 struct v4l2_audio *a)
251 {
252         if (a->index > 1)
253                 return -EINVAL;
254
255         strcpy(a->name, "Radio");
256         a->capability = V4L2_AUDCAP_STEREO;
257         return 0;
258 }
259
260 static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
261 {
262         *i = 0;
263         return 0;
264 }
265
266 static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
267 {
268         if (i != 0)
269                 return -EINVAL;
270         return 0;
271 }
272
273 static int vidioc_s_audio(struct file *file, void *priv,
274                                 struct v4l2_audio *a)
275 {
276         if (a->index != 0)
277                 return -EINVAL;
278         return 0;
279 }
280
281 static struct rt_device rtrack2_unit;
282
283 static int rtrack2_exclusive_open(struct inode *inode, struct file *file)
284 {
285         return test_and_set_bit(0, &rtrack2_unit.in_use) ? -EBUSY : 0;
286 }
287
288 static int rtrack2_exclusive_release(struct inode *inode, struct file *file)
289 {
290         clear_bit(0, &rtrack2_unit.in_use);
291         return 0;
292 }
293
294 static const struct file_operations rtrack2_fops = {
295         .owner          = THIS_MODULE,
296         .open           = rtrack2_exclusive_open,
297         .release        = rtrack2_exclusive_release,
298         .ioctl          = video_ioctl2,
299 #ifdef CONFIG_COMPAT
300         .compat_ioctl   = v4l_compat_ioctl32,
301 #endif
302         .llseek         = no_llseek,
303 };
304
305 static const struct v4l2_ioctl_ops rtrack2_ioctl_ops = {
306         .vidioc_querycap    = vidioc_querycap,
307         .vidioc_g_tuner     = vidioc_g_tuner,
308         .vidioc_s_tuner     = vidioc_s_tuner,
309         .vidioc_g_frequency = vidioc_g_frequency,
310         .vidioc_s_frequency = vidioc_s_frequency,
311         .vidioc_queryctrl   = vidioc_queryctrl,
312         .vidioc_g_ctrl      = vidioc_g_ctrl,
313         .vidioc_s_ctrl      = vidioc_s_ctrl,
314         .vidioc_g_audio     = vidioc_g_audio,
315         .vidioc_s_audio     = vidioc_s_audio,
316         .vidioc_g_input     = vidioc_g_input,
317         .vidioc_s_input     = vidioc_s_input,
318 };
319
320 static struct video_device rtrack2_radio = {
321         .name           = "RadioTrack II radio",
322         .fops           = &rtrack2_fops,
323         .ioctl_ops      = &rtrack2_ioctl_ops,
324         .release        = video_device_release_empty,
325 };
326
327 static int __init rtrack2_init(void)
328 {
329         if(io==-1)
330         {
331                 printk(KERN_ERR "You must set an I/O address with io=0x20c or io=0x30c\n");
332                 return -EINVAL;
333         }
334         if (!request_region(io, 4, "rtrack2"))
335         {
336                 printk(KERN_ERR "rtrack2: port 0x%x already in use\n", io);
337                 return -EBUSY;
338         }
339
340         video_set_drvdata(&rtrack2_radio, &rtrack2_unit);
341
342         spin_lock_init(&lock);
343         if (video_register_device(&rtrack2_radio, VFL_TYPE_RADIO, radio_nr) < 0) {
344                 release_region(io, 4);
345                 return -EINVAL;
346         }
347
348         printk(KERN_INFO "AIMSlab Radiotrack II card driver.\n");
349
350         /* mute card - prevents noisy bootups */
351         outb(1, io);
352         rtrack2_unit.muted = 1;
353
354         return 0;
355 }
356
357 MODULE_AUTHOR("Ben Pfaff");
358 MODULE_DESCRIPTION("A driver for the RadioTrack II radio card.");
359 MODULE_LICENSE("GPL");
360
361 module_param(io, int, 0);
362 MODULE_PARM_DESC(io, "I/O address of the RadioTrack card (0x20c or 0x30c)");
363 module_param(radio_nr, int, 0);
364
365 static void __exit rtrack2_cleanup_module(void)
366 {
367         video_unregister_device(&rtrack2_radio);
368         release_region(io,4);
369 }
370
371 module_init(rtrack2_init);
372 module_exit(rtrack2_cleanup_module);
373
374 /*
375   Local variables:
376   compile-command: "mmake"
377   End:
378 */