1 files changed, 264 insertions, 0 deletions

diff --git a/drivers/media/radio/miropcm20-radio.c b/drivers/media/radio/miropcm20-radio.c
new file mode 100644
index 000000000000..c2ebe8754a95
--- /dev/null
+++ b/drivers/media/radio/miropcm20-radio.c
@@ -0,0 +1,264 @@
+/* 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 can't 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_param(radio_nr, int, 0);
+
+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, NULL, 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;
+        pr_debug("check_sig: 0x%x\n", i);
+        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 can't 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;
+        pr_debug("rds-signal: %d\n", buf);
+        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);
+                        pr_debug("First view (setfreq): 0x%x\n", i);
+                        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,
+};
+
+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);