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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 | /* Miro PCM20 radio driver for Linux radio support * (c) 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl> * Thanks to Norberto Pellici for the ACI device interface specification * The API part is based on the radiotrack driver by M. Kirkwood * This driver relies on the aci mixer (drivers/sound/aci.c) * Look there for further info... */ /* Revision history: * * 1998 Ruurd Reitsma <R.A.Reitsma@wbmt.tudelft.nl> * 2000-09-05 Robert Siemer <Robert.Siemer@gmx.de> * removed unfinished volume control (maybe adding it later again) * use OSS-mixer; added stereo control */ /* What ever you think about the ACI, version 0x07 is not very well! * I cant get frequency, 'tuner status', 'tuner flags' or mute/mono * conditions... Robert */ #include <linux/module.h> #include <linux/init.h> #include <linux/videodev.h> #include "../../../sound/oss/aci.h" #include "miropcm20-rds-core.h" static int radio_nr = -1; MODULE_PARM(radio_nr, "i"); struct pcm20_device { unsigned long freq; int muted; int stereo; }; static int pcm20_mute(struct pcm20_device *dev, unsigned char mute) { dev->muted = mute; return aci_write_cmd(ACI_SET_TUNERMUTE, mute); } static int pcm20_stereo(struct pcm20_device *dev, unsigned char stereo) { dev->stereo = stereo; return aci_write_cmd(ACI_SET_TUNERMONO, !stereo); } static int pcm20_setfreq(struct pcm20_device *dev, unsigned long freq) { unsigned char freql; unsigned char freqh; dev->freq=freq; freq /= 160; if (!(aci_version==0x07 || aci_version>=0xb0)) freq /= 10; /* I don't know exactly which version * needs this hack */ freql = freq & 0xff; freqh = freq >> 8; aci_rds_cmd(RDS_RESET, 0, 0); pcm20_stereo(dev, 1); return aci_rw_cmd(ACI_WRITE_TUNE, freql, freqh); } static int pcm20_getflags(struct pcm20_device *dev, __u32 *flags, __u16 *signal) { /* okay, check for signal, stereo and rds here... */ int i; unsigned char buf; if ((i=aci_rw_cmd(ACI_READ_TUNERSTATION, -1, -1))<0) return i; #if DEBUG printk("check_sig: 0x%x\n", i); #endif if (i & 0x80) { /* no signal from tuner */ *flags=0; *signal=0; return 0; } else *signal=0xffff; if ((i=aci_rw_cmd(ACI_READ_TUNERSTEREO, -1, -1))<0) return i; if (i & 0x40) { *flags=0; } else { /* stereo */ *flags=VIDEO_TUNER_STEREO_ON; /* I cant see stereo, when forced to mono */ dev->stereo=1; } if ((i=aci_rds_cmd(RDS_STATUS, &buf, 1))<0) return i; if (buf & 1) /* RDS available */ *flags|=VIDEO_TUNER_RDS_ON; else return 0; if ((i=aci_rds_cmd(RDS_RXVALUE, &buf, 1))<0) return i; #if DEBUG printk("rds-signal: %d\n", buf); #endif if (buf > 15) { printk("miropcm20-radio: RX strengths unexpected high...\n"); buf=15; } /* refine signal */ if ((*signal=SCALE(15, 0xffff, buf))==0) *signal = 1; return 0; } static int pcm20_do_ioctl(struct inode *inode, struct file *file, unsigned int cmd, void *arg) { struct video_device *dev = video_devdata(file); struct pcm20_device *pcm20 = dev->priv; int i; switch(cmd) { case VIDIOCGCAP: { struct video_capability *v = arg; memset(v,0,sizeof(*v)); v->type=VID_TYPE_TUNER; strcpy(v->name, "Miro PCM20"); v->channels=1; v->audios=1; return 0; } case VIDIOCGTUNER: { struct video_tuner *v = arg; if(v->tuner) /* Only 1 tuner */ return -EINVAL; v->rangelow=87*16000; v->rangehigh=108*16000; pcm20_getflags(pcm20, &v->flags, &v->signal); v->flags|=VIDEO_TUNER_LOW; v->mode=VIDEO_MODE_AUTO; strcpy(v->name, "FM"); return 0; } case VIDIOCSTUNER: { struct video_tuner *v = arg; if(v->tuner!=0) return -EINVAL; /* Only 1 tuner so no setting needed ! */ return 0; } case VIDIOCGFREQ: { unsigned long *freq = arg; *freq = pcm20->freq; return 0; } case VIDIOCSFREQ: { unsigned long *freq = arg; pcm20->freq = *freq; i=pcm20_setfreq(pcm20, pcm20->freq); #if DEBUG printk("First view (setfreq): 0x%x\n", i); #endif return i; } case VIDIOCGAUDIO: { struct video_audio *v = arg; memset(v,0, sizeof(*v)); v->flags=VIDEO_AUDIO_MUTABLE; if (pcm20->muted) v->flags|=VIDEO_AUDIO_MUTE; v->mode=VIDEO_SOUND_STEREO; if (pcm20->stereo) v->mode|=VIDEO_SOUND_MONO; /* v->step=2048; */ strcpy(v->name, "Radio"); return 0; } case VIDIOCSAUDIO: { struct video_audio *v = arg; if(v->audio) return -EINVAL; pcm20_mute(pcm20, !!(v->flags&VIDEO_AUDIO_MUTE)); if(v->flags&VIDEO_SOUND_MONO) pcm20_stereo(pcm20, 0); if(v->flags&VIDEO_SOUND_STEREO) pcm20_stereo(pcm20, 1); return 0; } default: return -ENOIOCTLCMD; } } static int pcm20_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { return video_usercopy(inode, file, cmd, arg, pcm20_do_ioctl); } static struct pcm20_device pcm20_unit = { freq: 87*16000, muted: 1, stereo: 0 }; static struct file_operations pcm20_fops = { owner: THIS_MODULE, open: video_exclusive_open, release: video_exclusive_release, ioctl: pcm20_ioctl, llseek: no_llseek, }; static struct video_device pcm20_radio = { owner: THIS_MODULE, name: "Miro PCM 20 radio", type: VID_TYPE_TUNER, hardware: VID_HARDWARE_RTRACK, fops: &pcm20_fops, priv: &pcm20_unit }; static int __init pcm20_init(void) { if(video_register_device(&pcm20_radio, VFL_TYPE_RADIO, radio_nr)==-1) goto video_register_device; if(attach_aci_rds()<0) goto attach_aci_rds; printk(KERN_INFO "Miro PCM20 radio card driver.\n"); return 0; attach_aci_rds: video_unregister_device(&pcm20_radio); video_register_device: return -EINVAL; } MODULE_AUTHOR("Ruurd Reitsma"); MODULE_DESCRIPTION("A driver for the Miro PCM20 radio card."); MODULE_LICENSE("GPL"); static void __exit pcm20_cleanup(void) { unload_aci_rds(); video_unregister_device(&pcm20_radio); } module_init(pcm20_init); module_exit(pcm20_cleanup); |