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acrn-kernel/drivers/media/radio/radio-trust.c

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/* 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)
*
* Converted to V4L2 API by Mauro Carvalho Chehab <mchehab@infradead.org>
*/
#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/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/version.h> /* for KERNEL_VERSION MACRO */
#define RADIO_VERSION KERNEL_VERSION(0,0,2)
static struct v4l2_queryctrl radio_qctrl[] = {
{
.id = V4L2_CID_AUDIO_MUTE,
.name = "Mute",
.minimum = 0,
.maximum = 1,
.default_value = 1,
.type = V4L2_CTRL_TYPE_BOOLEAN,
},{
.id = V4L2_CID_AUDIO_VOLUME,
.name = "Volume",
.minimum = 0,
.maximum = 65535,
.step = 2048,
.default_value = 65535,
.type = V4L2_CTRL_TYPE_INTEGER,
},{
.id = V4L2_CID_AUDIO_BASS,
.name = "Bass",
.minimum = 0,
.maximum = 65535,
.step = 4370,
.default_value = 32768,
.type = V4L2_CTRL_TYPE_INTEGER,
},{
.id = V4L2_CID_AUDIO_TREBLE,
.name = "Treble",
.minimum = 0,
.maximum = 65535,
.step = 4370,
.default_value = 32768,
.type = V4L2_CTRL_TYPE_INTEGER,
},
};
/* 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 radio_nr = -1;
static int ioval = 0xf;
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_do_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, void *arg)
{
switch(cmd)
{
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *v = arg;
memset(v,0,sizeof(*v));
strlcpy(v->driver, "radio-trust", sizeof (v->driver));
strlcpy(v->card, "Trust FM Radio", sizeof (v->card));
sprintf(v->bus_info,"ISA");
v->version = RADIO_VERSION;
v->capabilities = V4L2_CAP_TUNER;
return 0;
}
case VIDIOC_G_TUNER:
{
struct v4l2_tuner *v = arg;
if (v->index > 0)
return -EINVAL;
memset(v,0,sizeof(*v));
strcpy(v->name, "FM");
v->type = V4L2_TUNER_RADIO;
v->rangelow=(87.5*16000);
v->rangehigh=(108*16000);
v->rxsubchans =V4L2_TUNER_SUB_MONO|V4L2_TUNER_SUB_STEREO;
v->capability=V4L2_TUNER_CAP_LOW;
if(tr_getstereo())
v->audmode = V4L2_TUNER_MODE_STEREO;
else
v->audmode = V4L2_TUNER_MODE_MONO;
v->signal=tr_getsigstr();
return 0;
}
case VIDIOC_S_TUNER:
{
struct v4l2_tuner *v = arg;
if (v->index > 0)
return -EINVAL;
return 0;
}
case VIDIOC_S_FREQUENCY:
{
struct v4l2_frequency *f = arg;
curfreq = f->frequency;
tr_setfreq(curfreq);
return 0;
}
case VIDIOC_G_FREQUENCY:
{
struct v4l2_frequency *f = arg;
f->type = V4L2_TUNER_RADIO;
f->frequency = curfreq;
return 0;
}
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *qc = arg;
int i;
for (i = 0; i < ARRAY_SIZE(radio_qctrl); i++) {
if (qc->id && qc->id == radio_qctrl[i].id) {
memcpy(qc, &(radio_qctrl[i]),
sizeof(*qc));
return (0);
}
}
return -EINVAL;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *ctrl= arg;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
ctrl->value=curmute;
return (0);
case V4L2_CID_AUDIO_VOLUME:
ctrl->value= curvol * 2048;
return (0);
case V4L2_CID_AUDIO_BASS:
ctrl->value= curbass * 4370;
return (0);
case V4L2_CID_AUDIO_TREBLE:
ctrl->value= curtreble * 4370;
return (0);
}
return -EINVAL;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *ctrl= arg;
switch (ctrl->id) {
case V4L2_CID_AUDIO_MUTE:
tr_setmute(ctrl->value);
return 0;
case V4L2_CID_AUDIO_VOLUME:
tr_setvol(ctrl->value);
return 0;
case V4L2_CID_AUDIO_BASS:
tr_setbass(ctrl->value);
return 0;
case V4L2_CID_AUDIO_TREBLE:
tr_settreble(ctrl->value);
return (0);
}
return -EINVAL;
}
default:
return v4l_compat_translate_ioctl(inode,file,cmd,arg,
tr_do_ioctl);
}
}
static int tr_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(inode, file, cmd, arg, tr_do_ioctl);
}
static const struct file_operations trust_fops = {
.owner = THIS_MODULE,
.open = video_exclusive_open,
.release = video_exclusive_release,
.ioctl = tr_ioctl,
.compat_ioctl = v4l_compat_ioctl32,
.llseek = no_llseek,
};
static struct video_device trust_radio=
{
.owner = THIS_MODULE,
.name = "Trust FM Radio",
.type = VID_TYPE_TUNER,
.hardware = 0,
.fops = &trust_fops,
};
static int __init trust_init(void)
{
if(io == -1) {
printk(KERN_ERR "You must set an I/O address with io=0x???\n");
return -EINVAL;
}
if(!request_region(io, 2, "Trust FM Radio")) {
printk(KERN_ERR "trust: port 0x%x already in use\n", io);
return -EBUSY;
}
if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1)
{
release_region(io, 2);
return -EINVAL;
}
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 */
tr_setvol(0x8000);
tr_setbass(0x8000);
tr_settreble(0x8000);
tr_setstereo(1);
/* mute card - prevents noisy bootups */
tr_setmute(1);
return 0;
}
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_LICENSE("GPL");
module_param(io, int, 0);
MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
module_param(radio_nr, int, 0);
static void __exit cleanup_trust_module(void)
{
video_unregister_device(&trust_radio);
release_region(io, 2);
}
module_init(trust_init);
module_exit(cleanup_trust_module);
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