mirror of https://gitee.com/openkylin/linux.git
434 lines
9.6 KiB
C
434 lines
9.6 KiB
C
/* 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 <media/v4l2-ioctl.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;
|
|
static unsigned long in_use;
|
|
|
|
/* 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 vidioc_querycap(struct file *file, void *priv,
|
|
struct v4l2_capability *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;
|
|
}
|
|
|
|
static int vidioc_g_tuner(struct file *file, void *priv,
|
|
struct v4l2_tuner *v)
|
|
{
|
|
if (v->index > 0)
|
|
return -EINVAL;
|
|
|
|
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;
|
|
}
|
|
|
|
static int vidioc_s_tuner(struct file *file, void *priv,
|
|
struct v4l2_tuner *v)
|
|
{
|
|
if (v->index > 0)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_frequency(struct file *file, void *priv,
|
|
struct v4l2_frequency *f)
|
|
{
|
|
curfreq = f->frequency;
|
|
tr_setfreq(curfreq);
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_frequency(struct file *file, void *priv,
|
|
struct v4l2_frequency *f)
|
|
{
|
|
f->type = V4L2_TUNER_RADIO;
|
|
f->frequency = curfreq;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_queryctrl(struct file *file, void *priv,
|
|
struct v4l2_queryctrl *qc)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int vidioc_g_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int vidioc_s_ctrl(struct file *file, void *priv,
|
|
struct v4l2_control *ctrl)
|
|
{
|
|
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;
|
|
}
|
|
|
|
static int vidioc_g_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *a)
|
|
{
|
|
if (a->index > 1)
|
|
return -EINVAL;
|
|
|
|
strcpy(a->name, "Radio");
|
|
a->capability = V4L2_AUDCAP_STEREO;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_g_input(struct file *filp, void *priv, unsigned int *i)
|
|
{
|
|
*i = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_input(struct file *filp, void *priv, unsigned int i)
|
|
{
|
|
if (i != 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static int vidioc_s_audio(struct file *file, void *priv,
|
|
struct v4l2_audio *a)
|
|
{
|
|
if (a->index != 0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static int trust_exclusive_open(struct inode *inode, struct file *file)
|
|
{
|
|
return test_and_set_bit(0, &in_use) ? -EBUSY : 0;
|
|
}
|
|
|
|
static int trust_exclusive_release(struct inode *inode, struct file *file)
|
|
{
|
|
clear_bit(0, &in_use);
|
|
return 0;
|
|
}
|
|
|
|
static const struct file_operations trust_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = trust_exclusive_open,
|
|
.release = trust_exclusive_release,
|
|
.ioctl = video_ioctl2,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = v4l_compat_ioctl32,
|
|
#endif
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static const struct v4l2_ioctl_ops trust_ioctl_ops = {
|
|
.vidioc_querycap = vidioc_querycap,
|
|
.vidioc_g_tuner = vidioc_g_tuner,
|
|
.vidioc_s_tuner = vidioc_s_tuner,
|
|
.vidioc_g_frequency = vidioc_g_frequency,
|
|
.vidioc_s_frequency = vidioc_s_frequency,
|
|
.vidioc_queryctrl = vidioc_queryctrl,
|
|
.vidioc_g_ctrl = vidioc_g_ctrl,
|
|
.vidioc_s_ctrl = vidioc_s_ctrl,
|
|
.vidioc_g_audio = vidioc_g_audio,
|
|
.vidioc_s_audio = vidioc_s_audio,
|
|
.vidioc_g_input = vidioc_g_input,
|
|
.vidioc_s_input = vidioc_s_input,
|
|
};
|
|
|
|
static struct video_device trust_radio = {
|
|
.name = "Trust FM Radio",
|
|
.fops = &trust_fops,
|
|
.ioctl_ops = &trust_ioctl_ops,
|
|
.release = video_device_release_empty,
|
|
};
|
|
|
|
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) < 0) {
|
|
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);
|