Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild
[linux-2.6] / drivers / media / radio / miropcm20-radio.c
1 /* Miro PCM20 radio driver for Linux radio support
2  * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
3  * Thanks to Norberto Pellici for the ACI device interface specification
4  * The API part is based on the radiotrack driver by M. Kirkwood
5  * This driver relies on the aci mixer (drivers/sound/aci.c)
6  * Look there for further info...
7  */
8
9 /* Revision history:
10  *
11  *   1998        Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl>
12  *   2000-09-05  Robert Siemer <Robert.Siemer@gmx.de>
13  *        removed unfinished volume control (maybe adding it later again)
14  *        use OSS-mixer; added stereo control
15  */
16
17 /* What ever you think about the ACI, version 0x07 is not very well!
18  * I can't get frequency, 'tuner status', 'tuner flags' or mute/mono
19  * conditions...                Robert
20  */
21
22 #include <linux/module.h>
23 #include <linux/init.h>
24 #include <linux/videodev.h>
25 #include <media/v4l2-common.h>
26 #include "oss/aci.h"
27 #include "miropcm20-rds-core.h"
28
29 static int radio_nr = -1;
30 module_param(radio_nr, int, 0);
31
32 struct pcm20_device {
33         unsigned long freq;
34         int muted;
35         int stereo;
36 };
37
38
39 static int pcm20_mute(struct pcm20_device *dev, unsigned char mute)
40 {
41         dev->muted = mute;
42         return aci_write_cmd(ACI_SET_TUNERMUTE, mute);
43 }
44
45 static int pcm20_stereo(struct pcm20_device *dev, unsigned char stereo)
46 {
47         dev->stereo = stereo;
48         return aci_write_cmd(ACI_SET_TUNERMONO, !stereo);
49 }
50
51 static int pcm20_setfreq(struct pcm20_device *dev, unsigned long freq)
52 {
53         unsigned char freql;
54         unsigned char freqh;
55
56         dev->freq=freq;
57
58         freq /= 160;
59         if (!(aci_version==0x07 || aci_version>=0xb0))
60                 freq /= 10;  /* I don't know exactly which version
61                               * needs this hack */
62         freql = freq & 0xff;
63         freqh = freq >> 8;
64
65         aci_rds_cmd(RDS_RESET, NULL, 0);
66         pcm20_stereo(dev, 1);
67
68         return aci_rw_cmd(ACI_WRITE_TUNE, freql, freqh);
69 }
70
71 static int pcm20_getflags(struct pcm20_device *dev, __u32 *flags, __u16 *signal)
72 {
73         /* okay, check for signal, stereo and rds here... */
74         int i;
75         unsigned char buf;
76
77         if ((i=aci_rw_cmd(ACI_READ_TUNERSTATION, -1, -1))<0)
78                 return i;
79         pr_debug("check_sig: 0x%x\n", i);
80         if (i & 0x80) {
81                 /* no signal from tuner */
82                 *flags=0;
83                 *signal=0;
84                 return 0;
85         } else
86                 *signal=0xffff;
87
88         if ((i=aci_rw_cmd(ACI_READ_TUNERSTEREO, -1, -1))<0)
89                 return i;
90         if (i & 0x40) {
91                 *flags=0;
92         } else {
93                 /* stereo */
94                 *flags=VIDEO_TUNER_STEREO_ON;
95                 /* I can't see stereo, when forced to mono */
96                 dev->stereo=1;
97         }
98
99         if ((i=aci_rds_cmd(RDS_STATUS, &buf, 1))<0)
100                 return i;
101         if (buf & 1)
102                 /* RDS available */
103                 *flags|=VIDEO_TUNER_RDS_ON;
104         else
105                 return 0;
106
107         if ((i=aci_rds_cmd(RDS_RXVALUE, &buf, 1))<0)
108                 return i;
109         pr_debug("rds-signal: %d\n", buf);
110         if (buf > 15) {
111                 printk("miropcm20-radio: RX strengths unexpected high...\n");
112                 buf=15;
113         }
114         /* refine signal */
115         if ((*signal=SCALE(15, 0xffff, buf))==0)
116                 *signal = 1;
117
118         return 0;
119 }
120
121 static int pcm20_do_ioctl(struct inode *inode, struct file *file,
122                           unsigned int cmd, void *arg)
123 {
124         struct video_device *dev = video_devdata(file);
125         struct pcm20_device *pcm20 = dev->priv;
126         int i;
127
128         switch(cmd)
129         {
130                 case VIDIOCGCAP:
131                 {
132                         struct video_capability *v = arg;
133                         memset(v,0,sizeof(*v));
134                         v->type=VID_TYPE_TUNER;
135                         strcpy(v->name, "Miro PCM20");
136                         v->channels=1;
137                         v->audios=1;
138                         return 0;
139                 }
140                 case VIDIOCGTUNER:
141                 {
142                         struct video_tuner *v = arg;
143                         if(v->tuner)    /* Only 1 tuner */
144                                 return -EINVAL;
145                         v->rangelow=87*16000;
146                         v->rangehigh=108*16000;
147                         pcm20_getflags(pcm20, &v->flags, &v->signal);
148                         v->flags|=VIDEO_TUNER_LOW;
149                         v->mode=VIDEO_MODE_AUTO;
150                         strcpy(v->name, "FM");
151                         return 0;
152                 }
153                 case VIDIOCSTUNER:
154                 {
155                         struct video_tuner *v = arg;
156                         if(v->tuner!=0)
157                                 return -EINVAL;
158                         /* Only 1 tuner so no setting needed ! */
159                         return 0;
160                 }
161                 case VIDIOCGFREQ:
162                 {
163                         unsigned long *freq = arg;
164                         *freq = pcm20->freq;
165                         return 0;
166                 }
167                 case VIDIOCSFREQ:
168                 {
169                         unsigned long *freq = arg;
170                         pcm20->freq = *freq;
171                         i=pcm20_setfreq(pcm20, pcm20->freq);
172                         pr_debug("First view (setfreq): 0x%x\n", i);
173                         return i;
174                 }
175                 case VIDIOCGAUDIO:
176                 {
177                         struct video_audio *v = arg;
178                         memset(v,0, sizeof(*v));
179                         v->flags=VIDEO_AUDIO_MUTABLE;
180                         if (pcm20->muted)
181                                 v->flags|=VIDEO_AUDIO_MUTE;
182                         v->mode=VIDEO_SOUND_STEREO;
183                         if (pcm20->stereo)
184                                 v->mode|=VIDEO_SOUND_MONO;
185                         /* v->step=2048; */
186                         strcpy(v->name, "Radio");
187                         return 0;
188                 }
189                 case VIDIOCSAUDIO:
190                 {
191                         struct video_audio *v = arg;
192                         if(v->audio)
193                                 return -EINVAL;
194
195                         pcm20_mute(pcm20, !!(v->flags&VIDEO_AUDIO_MUTE));
196                         if(v->flags&VIDEO_SOUND_MONO)
197                                 pcm20_stereo(pcm20, 0);
198                         if(v->flags&VIDEO_SOUND_STEREO)
199                                 pcm20_stereo(pcm20, 1);
200
201                         return 0;
202                 }
203                 default:
204                         return -ENOIOCTLCMD;
205         }
206 }
207
208 static int pcm20_ioctl(struct inode *inode, struct file *file,
209                        unsigned int cmd, unsigned long arg)
210 {
211         return video_usercopy(inode, file, cmd, arg, pcm20_do_ioctl);
212 }
213
214 static struct pcm20_device pcm20_unit = {
215         .freq   = 87*16000,
216         .muted  = 1,
217 };
218
219 static struct file_operations pcm20_fops = {
220         .owner          = THIS_MODULE,
221         .open           = video_exclusive_open,
222         .release        = video_exclusive_release,
223         .ioctl          = pcm20_ioctl,
224         .compat_ioctl   = v4l_compat_ioctl32,
225         .llseek         = no_llseek,
226 };
227
228 static struct video_device pcm20_radio = {
229         .owner          = THIS_MODULE,
230         .name           = "Miro PCM 20 radio",
231         .type           = VID_TYPE_TUNER,
232         .hardware       = VID_HARDWARE_RTRACK,
233         .fops           = &pcm20_fops,
234         .priv           = &pcm20_unit
235 };
236
237 static int __init pcm20_init(void)
238 {
239         if(video_register_device(&pcm20_radio, VFL_TYPE_RADIO, radio_nr)==-1)
240                 goto video_register_device;
241
242         if(attach_aci_rds()<0)
243                 goto attach_aci_rds;
244
245         printk(KERN_INFO "Miro PCM20 radio card driver.\n");
246
247         return 0;
248
249  attach_aci_rds:
250         video_unregister_device(&pcm20_radio);
251  video_register_device:
252         return -EINVAL;
253 }
254
255 MODULE_AUTHOR("Ruurd Reitsma");
256 MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card.");
257 MODULE_LICENSE("GPL");
258
259 static void __exit pcm20_cleanup(void)
260 {
261         unload_aci_rds();
262         video_unregister_device(&pcm20_radio);
263 }
264
265 module_init(pcm20_init);
266 module_exit(pcm20_cleanup);