patch-2.4.4 linux/drivers/media/radio/radio-miropcm20.c

• Lines: 313
• Date: Fri Apr 13 20:26:07 2001
• Orig file: v2.4.3/linux/drivers/media/radio/radio-miropcm20.c
• Orig date: Fri Mar 2 11:12:10 2001

diff -u --recursive --new-file v2.4.3/linux/drivers/media/radio/radio-miropcm20.c linux/drivers/media/radio/radio-miropcm20.c
@@ -2,62 +2,53 @@
  * (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/lowlevel/aci.c)
+ * This driver relies on the aci mixer (drivers/sound/aci.c)
  * Look there for further info...
  */
 
-#include <linux/module.h>		/* Modules 			*/
-#include <linux/init.h>			/* Initdata			*/
-#include <asm/uaccess.h>		/* copy to/from user		*/
-#include <linux/videodev.h>		/* kernel radio structs		*/
-#include "../../sound/miroaci.h"	/* ACI Control by acimixer      */
+/* 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 <linux/devfs_fs_kernel.h>
+#include <asm/uaccess.h>
+
+char * aci_radio_name;
+
+#include "../../sound/aci.h"
 
 static int users = 0;
 
 struct pcm20_device
 {
-	int port;
-	int curvol;
-	unsigned long curfreq;
+	unsigned long freq;
 	int muted;
+	int stereo;
 };
 
 
-/* local things */
-
-
-static void pcm20_mute(struct pcm20_device *dev)
+static int pcm20_mute(struct pcm20_device *dev, unsigned char mute)
 {
-
-	dev->muted = 1;
-	aci_write_cmd(0xa3,0x01);			
-
+	dev->muted = mute;
+	return aci_write_cmd(0xa3, mute);
 }
 
-static int pcm20_setvol(struct pcm20_device *dev, int vol)
+static int pcm20_stereo(struct pcm20_device *dev, unsigned char stereo)
 {
-
-	if(vol == dev->curvol) {	/* requested volume = current */
-		if (dev->muted) {	/* user is unmuting the card  */
-			dev->muted = 0;
-			aci_write_cmd(0xa3,0x00); 	/* enable card */
-		}	
-	
-		return 0;
-	}
-
-	if(vol == 0) {			/* volume = 0 means mute the card */
-		aci_write_cmd(0x3d, 0x20);
-		aci_write_cmd(0x35, 0x20);
-		return 0;
-	}
-
-	dev->muted = 0;
-	aci_write_cmd(0x3d, 32-vol); 	/* Right Channel */
-	aci_write_cmd(0x35, 32-vol);	/* Left Channel */
-	dev->curvol = vol;
-
-	return 0;
+	dev->stereo = stereo;
+	return aci_write_cmd(0xa4, !stereo);
 }
 
 static int pcm20_setfreq(struct pcm20_device *dev, unsigned long freq)
@@ -65,28 +56,79 @@
 	unsigned char freql;
 	unsigned char freqh;
 
-	freq = (freq * 10) / 16;
-	freql = freq & 0xff;
-	freqh = freq >> 8;	
+	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_write_cmd_d(0xa7, freql, freqh);	/*  Tune to frequency	*/
+	aci_rds_cmd(RDS_RESET, 0, 0);
+	pcm20_stereo(dev, 1);
 
-	return 0;
+	return aci_rw_cmd(0xa7, freql, freqh);	/*  Tune to frequency	*/
 }
 
-int pcm20_getsigstr(struct pcm20_device *dev)
+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;
-	aci_indexed_cmd(0xf0, 0x32, &buf);
-	if ((buf & 0x80) == 0x80)	
+
+	if ((i=aci_rw_cmd(0xa9, -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(0xa8, -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;
-	return 1;		/* signal present		*/
+
+	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("rds-miropcm20: RX strengths unexpected high...\n");
+		buf=15;
+	}
+	/* refine signal */
+	if ((*signal=SCALE(15, 0xffff, buf))==0)
+		*signal = 1;
+
+	return 0;
 }
 
 static int pcm20_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
 {
 	struct pcm20_device *pcm20=dev->priv;
+	int i;
 	
 	switch(cmd)
 	{
@@ -113,11 +155,11 @@
 				return -EFAULT;
 			if(v.tuner)	/* Only 1 tuner */ 
 				return -EINVAL;
-			v.rangelow=(int)(87.5*16);
-			v.rangehigh=(int)(108.0*16);
-			v.flags=0;
+			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;
-			v.signal=0xFFFF*pcm20_getsigstr(pcm20);
 			strcpy(v.name, "FM");
 			if(copy_to_user(arg,&v, sizeof(v)))
 				return -EFAULT;
@@ -134,20 +176,28 @@
 			return 0;
 		}
 		case VIDIOCGFREQ:
-			if(copy_to_user(arg, &pcm20->curfreq, sizeof(pcm20->curfreq)))
+			if(copy_to_user(arg, &pcm20->freq, sizeof(pcm20->freq)))
 				return -EFAULT;
 			return 0;
 		case VIDIOCSFREQ:
-			if(copy_from_user(&pcm20->curfreq, arg,sizeof(pcm20->curfreq)))
+			if(copy_from_user(&pcm20->freq, arg, sizeof(pcm20->freq)))
 				return -EFAULT;
-			pcm20_setfreq(pcm20, pcm20->curfreq);
-			return 0;
+			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;
 			memset(&v,0, sizeof(v));
-			v.flags|=VIDEO_AUDIO_MUTABLE|VIDEO_AUDIO_VOLUME;
-			v.volume=pcm20->curvol * 2048;
+			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");
 			if(copy_to_user(arg,&v, sizeof(v)))
 				return -EFAULT;
@@ -157,14 +207,15 @@
 		{
 			struct video_audio v;
 			if(copy_from_user(&v, arg, sizeof(v))) 
-				return -EFAULT;	
+				return -EFAULT;
 			if(v.audio) 
 				return -EINVAL;
 
-			if(v.flags&VIDEO_AUDIO_MUTE) 
-				pcm20_mute(pcm20);
-			else
-				pcm20_setvol(pcm20,v.volume/2048);	
+			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;
 		}
@@ -186,7 +237,12 @@
 	users--;
 }
 
-static struct pcm20_device pcm20_unit;
+static struct pcm20_device pcm20_unit=
+{
+	freq:   87*16000,
+	muted:  1,
+	stereo: 0
+};
 
 static struct video_device pcm20_radio=
 {
@@ -197,24 +253,23 @@
 	open:		pcm20_open,
 	close:		pcm20_close,
 	ioctl:		pcm20_ioctl,
+	priv:		&pcm20_unit
 };
 
 static int __init pcm20_init(void)
 {
-
-	pcm20_radio.priv=&pcm20_unit;
-	
 	if(video_register_device(&pcm20_radio, VFL_TYPE_RADIO)==-1)
 		return -EINVAL;
 		
+	if(attach_aci_rds()<0) {
+		video_unregister_device(&pcm20_radio);
+		return -EINVAL;
+	}
+#if DEBUG
+	printk("v4l-name: %s\n", devfs_get_name(pcm20_radio.devfs_handle, 0));
+#endif
 	printk(KERN_INFO "Miro PCM20 radio card driver.\n");
 
- 	/* mute card - prevents noisy bootups */
-
-	/* this ensures that the volume is all the way down  */
-
-	pcm20_unit.curvol = 0;
-
 	return 0;
 }
 
@@ -225,9 +280,9 @@
 
 static void __exit pcm20_cleanup(void)
 {
+	unload_aci_rds();
 	video_unregister_device(&pcm20_radio);
 }
 
 module_init(pcm20_init);
 module_exit(pcm20_cleanup);
-