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Subject[PATCH] New driver for Trust FM Radio card

This patch adds a driver for the Trust FM Radio Card.

Alan: Why are the bass and treble fields of struct video_audio
unsigned? You can have less or more bass/treble than normal so a
signed value would be more appropriate. Right now my driver uses 0 for
minimum bass/treble, 32768 for neutral and 65535 for maximum, but I
don't like this very much.

Eric

--
Eric Lammerts <eric@scintilla.utwente.nl>
--- linux/include/linux/videodev.h.orig Fri May 7 20:05:30 1999
+++ linux/include/linux/videodev.h Thu Sep 2 23:46:47 1999
@@ -278,6 +278,7 @@
#define VID_HARDWARE_TYPHOON 19
#define VID_HARDWARE_VINO 20 /* Reserved for SGI Indy Vino */
#define VID_HARDWARE_CADET 21 /* Cadet radio */
+#define VID_HARDWARE_TRUST 22 /* Trust FM Radio */

/*
* Initialiser list
--- linux/drivers/char/radio-trust.c.orig Thu Sep 2 23:46:47 1999
+++ linux/drivers/char/radio-trust.c Thu Sep 2 23:44:29 1999
@@ -0,0 +1,351 @@
+/* radio-trust.c - Trust FM Radio card driver for Linux 2.2
+ * by Eric Lammerts <eric@scintilla.utwente.nl>
+ *
+ * Based on radio-aztech.c. Original notes:
+ *
+ * Adapted to support the Video for Linux API by
+ * Russell Kroll <rkroll@exploits.org>. Based on original tuner code by:
+ *
+ * Quay Ly
+ * Donald Song
+ * Jason Lewis (jlewis@twilight.vtc.vsc.edu)
+ * Scott McGrath (smcgrath@twilight.vtc.vsc.edu)
+ * William McGrath (wmcgrath@twilight.vtc.vsc.edu)
+ *
+ * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
+ */
+
+#include <stdarg.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <asm/io.h>
+#include <asm/uaccess.h>
+#include <linux/videodev.h>
+#include <linux/config.h> /* CONFIG_RADIO_TRUST_PORT */
+
+/* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
+
+#ifndef CONFIG_RADIO_TRUST_PORT
+#define CONFIG_RADIO_TRUST_PORT -1
+#endif
+
+static int io = CONFIG_RADIO_TRUST_PORT;
+static int ioval = 0xf;
+static int users = 0;
+static __u16 curvol;
+static __u16 curbass;
+static __u16 curtreble;
+static unsigned long curfreq;
+static int curstereo;
+static int curmute;
+
+/* i2c addresses */
+#define TDA7318_ADDR 0x88
+#define TSA6060T_ADDR 0xc4
+
+#define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
+#define TR_SET_SCL outb(ioval |= 2, io)
+#define TR_CLR_SCL outb(ioval &= 0xfd, io)
+#define TR_SET_SDA outb(ioval |= 1, io)
+#define TR_CLR_SDA outb(ioval &= 0xfe, io)
+
+static void write_i2c(int n, ...)
+{
+ unsigned char val, mask;
+ va_list args;
+
+ va_start(args, n);
+
+ /* start condition */
+ TR_SET_SDA;
+ TR_SET_SCL;
+ TR_DELAY;
+ TR_CLR_SDA;
+ TR_CLR_SCL;
+ TR_DELAY;
+
+ for(; n; n--) {
+ val = va_arg(args, unsigned);
+ for(mask = 0x80; mask; mask >>= 1) {
+ if(val & mask)
+ TR_SET_SDA;
+ else
+ TR_CLR_SDA;
+ TR_SET_SCL;
+ TR_DELAY;
+ TR_CLR_SCL;
+ TR_DELAY;
+ }
+ /* acknowledge bit */
+ TR_SET_SDA;
+ TR_SET_SCL;
+ TR_DELAY;
+ TR_CLR_SCL;
+ TR_DELAY;
+ }
+
+ /* stop condition */
+ TR_CLR_SDA;
+ TR_DELAY;
+ TR_SET_SCL;
+ TR_DELAY;
+ TR_SET_SDA;
+ TR_DELAY;
+
+ va_end(args);
+}
+
+static void tr_setvol(__u16 vol)
+{
+ curvol = vol / 2048;
+ write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
+}
+
+static int basstreble2chip[15] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
+};
+
+static void tr_setbass(__u16 bass)
+{
+ curbass = bass / 4370;
+ write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
+}
+
+static void tr_settreble(__u16 treble)
+{
+ curtreble = treble / 4370;
+ write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
+}
+
+static void tr_setstereo(int stereo)
+{
+ curstereo = !!stereo;
+ ioval = (ioval & 0xfb) | (!curstereo << 2);
+ outb(ioval, io);
+}
+
+static void tr_setmute(int mute)
+{
+ curmute = !!mute;
+ ioval = (ioval & 0xf7) | (curmute << 3);
+ outb(ioval, io);
+}
+
+static int tr_getsigstr(void)
+{
+ int i, v;
+
+ for(i = 0, v = 0; i < 100; i++) v |= inb(io);
+ return (v & 1)? 0 : 0xffff;
+}
+
+static int tr_getstereo(void)
+{
+ /* don't know how to determine it, just return the setting */
+ return curstereo;
+}
+
+static void tr_setfreq(unsigned long f)
+{
+ f /= 160; /* Convert to 10 kHz units */
+ f += 1070; /* Add 10.7 MHz IF */
+
+ write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
+}
+
+static int tr_ioctl(struct video_device *dev, unsigned int cmd, void *arg)
+{
+ switch(cmd)
+ {
+ case VIDIOCGCAP:
+ {
+ struct video_capability v;
+
+ v.type=VID_TYPE_TUNER;
+ v.channels=1;
+ v.audios=1;
+
+ /* No we don't do pictures */
+ v.maxwidth=0;
+ v.maxheight=0;
+ v.minwidth=0;
+ v.minheight=0;
+
+ strcpy(v.name, "Trust FM Radio");
+
+ if(copy_to_user(arg,&v,sizeof(v)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case VIDIOCGTUNER:
+ {
+ struct video_tuner v;
+
+ if(copy_from_user(&v, arg,sizeof(v))!=0)
+ return -EFAULT;
+
+ if(v.tuner) /* Only 1 tuner */
+ return -EINVAL;
+
+ v.rangelow = 87500 * 16;
+ v.rangehigh = 108000 * 16;
+ v.flags = VIDEO_TUNER_LOW;
+ v.mode = VIDEO_MODE_AUTO;
+
+ v.signal = tr_getsigstr();
+ if(tr_getstereo())
+ v.flags |= VIDEO_TUNER_STEREO_ON;
+
+ strcpy(v.name, "FM");
+
+ if(copy_to_user(arg,&v, sizeof(v)))
+ return -EFAULT;
+
+ return 0;
+ }
+ case VIDIOCSTUNER:
+ {
+ struct video_tuner v;
+
+ if(copy_from_user(&v, arg, sizeof(v)))
+ return -EFAULT;
+ if(v.tuner != 0)
+ return -EINVAL;
+
+ return 0;
+ }
+ case VIDIOCGFREQ:
+ if(copy_to_user(arg, &curfreq, sizeof(curfreq)))
+ return -EFAULT;
+ return 0;
+
+ case VIDIOCSFREQ:
+ {
+ unsigned long f;
+
+ if(copy_from_user(&f, arg, sizeof(curfreq)))
+ return -EFAULT;
+ tr_setfreq(f);
+ return 0;
+ }
+ case VIDIOCGAUDIO:
+ {
+ struct video_audio v;
+
+ memset(&v,0, sizeof(v));
+ v.flags = VIDEO_AUDIO_MUTABLE | VIDEO_AUDIO_VOLUME |
+ VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
+ v.mode = curstereo? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
+ v.volume = curvol * 2048;
+ v.step = 2048;
+ v.bass = curbass * 4370;
+ v.treble = curtreble * 4370;
+
+ strcpy(v.name, "Trust FM Radio");
+ if(copy_to_user(arg,&v, sizeof(v)))
+ return -EFAULT;
+ return 0;
+ }
+ case VIDIOCSAUDIO:
+ {
+ struct video_audio v;
+
+ if(copy_from_user(&v, arg, sizeof(v)))
+ return -EFAULT;
+ if(v.audio)
+ return -EINVAL;
+
+ tr_setvol(v.volume);
+ tr_setbass(v.bass);
+ tr_settreble(v.treble);
+ tr_setstereo(v.mode & VIDEO_SOUND_STEREO);
+ tr_setmute(v.flags & VIDEO_AUDIO_MUTE);
+ return 0;
+ }
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+
+static int tr_open(struct video_device *dev, int flags)
+{
+ if(users)
+ return -EBUSY;
+ users++;
+ MOD_INC_USE_COUNT;
+ return 0;
+}
+
+static void tr_close(struct video_device *dev)
+{
+ users--;
+ MOD_DEC_USE_COUNT;
+}
+
+static struct video_device trust_radio=
+{
+ "Trust FM Radio",
+ VID_TYPE_TUNER,
+ VID_HARDWARE_TRUST,
+ tr_open,
+ tr_close,
+ NULL, /* Can't read (no capture ability) */
+ NULL, /* Can't write */
+ NULL, /* No poll */
+ tr_ioctl,
+ NULL,
+ NULL
+};
+
+__initfunc(int trust_init(struct video_init *v))
+{
+ if(check_region(io, 2)) {
+ printk(KERN_ERR "trust: port 0x%x already in use\n", io);
+ return -EBUSY;
+ }
+ if(video_register_device(&trust_radio, VFL_TYPE_RADIO)==-1)
+ return -EINVAL;
+
+ request_region(io, 2, "Trust FM Radio");
+
+ printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
+
+ write_i2c(2, TDA7318_ADDR, 0x80); /* speaker att. LF = 0 dB */
+ write_i2c(2, TDA7318_ADDR, 0xa0); /* speaker att. RF = 0 dB */
+ write_i2c(2, TDA7318_ADDR, 0xc0); /* speaker att. LR = 0 dB */
+ write_i2c(2, TDA7318_ADDR, 0xe0); /* speaker att. RR = 0 dB */
+ write_i2c(2, TDA7318_ADDR, 0x40); /* stereo 1 input, gain = 18.75 dB */
+
+ /* mute card - prevents noisy bootups */
+ tr_setmute(1);
+
+ return 0;
+}
+
+#ifdef MODULE
+
+MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
+MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
+MODULE_PARM(io, "i");
+MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
+
+EXPORT_NO_SYMBOLS;
+
+int init_module(void)
+{
+ if(io == -1) {
+ printk(KERN_ERR "You must set an I/O address with io=0x???\n");
+ return -EINVAL;
+ }
+ return trust_init(NULL);
+}
+
+void cleanup_module(void)
+{
+ video_unregister_device(&trust_radio);
+ release_region(io, 2);
+}
+
+#endif
--- linux/drivers/char/Makefile.orig Thu Sep 2 23:46:28 1999
+++ linux/drivers/char/Makefile Thu Sep 2 23:46:47 1999
@@ -498,6 +498,14 @@
endif
endif

+ifeq ($(CONFIG_RADIO_TRUST),y)
+L_OBJS += radio-trust.o
+else
+ ifeq ($(CONFIG_RADIO_TRUST),m)
+ M_OBJS += radio-trust.o
+ endif
+endif
+
ifeq ($(CONFIG_QIC02_TAPE),y)
L_OBJS += tpqic02.o
else
--- linux/drivers/char/Config.in.orig Thu Sep 2 23:46:28 1999
+++ linux/drivers/char/Config.in Thu Sep 2 23:46:47 1999
@@ -134,6 +134,10 @@
if [ "$CONFIG_RADIO_GEMTEK" = "y" ]; then
hex ' GemTek i/o port (0x20c, 0x30c, 0x24c or 0x34c)' CONFIG_RADIO_GEMTEK_PORT 34c
fi
+ dep_tristate 'Trust FM Radio' CONFIG_RADIO_TRUST $CONFIG_VIDEO_DEV
+ if [ "$CONFIG_RADIO_TRUST" = "y" ]; then
+ hex ' Trust FM Radio I/O port (0x350 or 0x358)' CONFIG_RADIO_TRUST_PORT 350
+ fi
if [ "$CONFIG_PCI" != "n" ]; then
dep_tristate 'BT848 Video For Linux' CONFIG_VIDEO_BT848 $CONFIG_VIDEO_DEV
fi
--- linux/drivers/char/videodev.c.orig Mon Aug 9 21:04:39 1999
+++ linux/drivers/char/videodev.c Thu Sep 2 23:46:47 1999
@@ -81,6 +81,9 @@
#ifdef CONFIG_RADIO_CADET
extern int cadet_init(struct video_init *);
#endif
+#ifdef CONFIG_RADIO_TRUST
+extern int trust_init(struct video_init *);
+#endif
#ifdef CONFIG_VIDEO_PMS
extern int init_pms_cards(struct video_init *);
#endif
@@ -134,6 +137,9 @@
#endif
#ifdef CONFIG_VIDEO_ZORAN
{"zoran", init_zoran_cards},
+#endif
+#ifdef CONFIG_RADIO_TRUST
+ {"Trust", trust_init},
#endif
{"end", NULL}
};
--- linux/Documentation/Configure.help.orig Thu Sep 2 23:46:26 1999
+++ linux/Documentation/Configure.help Thu Sep 2 23:50:59 1999
@@ -11147,6 +11147,25 @@
Enter either 0x20c, 0x30c, 0x24c or 0x34c here. The card default is
0x34c, if you haven't changed the jumper setting on the card.

+Trust FM Radio Card
+CONFIG_RADIO_TRUST
+ Choose Y here if you have this FM radio card, and then fill in the
+ port address below.
+
+ In order to control your radio card, you will need to use programs
+ that are compatible with the Video for Linux API. Information on
+ this API and pointers to "v4l" programs may be found at
+ http://roadrunner.swansea.uk.linux.org/v4l.shtml.
+
+ If you want to compile this driver as a module ( = code which can be
+ inserted in and removed from the running kernel whenever you want),
+ say M here and read Documentation/modules.txt. The module will be
+ called radio-trust.o.
+
+Trust FM Radio I/O port
+CONFIG_RADIO_TRUST_PORT
+ Enter the I/O port of your card (usually 0x350 or 0x358).
+
BT848 Video For Linux
CONFIG_VIDEO_BT848
Support for BT848 based frame grabber/overlay boards. This includes
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