mirror of https://gitee.com/openkylin/linux.git
333 lines
8.6 KiB
C
333 lines
8.6 KiB
C
/* Maestro PCI sound card radio driver for Linux support
|
|
* (c) 2000 A. Tlalka, atlka@pg.gda.pl
|
|
* Notes on the hardware
|
|
*
|
|
* + Frequency control is done digitally
|
|
* + No volume control - only mute/unmute - you have to use Aux line volume
|
|
* control on Maestro card to set the volume
|
|
* + Radio status (tuned/not_tuned and stereo/mono) is valid some time after
|
|
* frequency setting (>100ms) and only when the radio is unmuted.
|
|
* version 0.02
|
|
* + io port is automatically detected - only the first radio is used
|
|
* version 0.03
|
|
* + thread access locking additions
|
|
* version 0.04
|
|
* + code improvements
|
|
* + VIDEO_TUNER_LOW is permanent
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/sched.h>
|
|
#include <asm/io.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/semaphore.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/videodev.h>
|
|
|
|
#define DRIVER_VERSION "0.04"
|
|
|
|
#define PCI_VENDOR_ESS 0x125D
|
|
#define PCI_DEVICE_ID_ESS_ESS1968 0x1968 /* Maestro 2 */
|
|
#define PCI_DEVICE_ID_ESS_ESS1978 0x1978 /* Maestro 2E */
|
|
|
|
#define GPIO_DATA 0x60 /* port offset from ESS_IO_BASE */
|
|
|
|
#define IO_MASK 4 /* mask register offset from GPIO_DATA
|
|
bits 1=unmask write to given bit */
|
|
#define IO_DIR 8 /* direction register offset from GPIO_DATA
|
|
bits 0/1=read/write direction */
|
|
|
|
#define GPIO6 0x0040 /* mask bits for GPIO lines */
|
|
#define GPIO7 0x0080
|
|
#define GPIO8 0x0100
|
|
#define GPIO9 0x0200
|
|
|
|
#define STR_DATA GPIO6 /* radio TEA5757 pins and GPIO bits */
|
|
#define STR_CLK GPIO7
|
|
#define STR_WREN GPIO8
|
|
#define STR_MOST GPIO9
|
|
|
|
#define FREQ_LO 50*16000
|
|
#define FREQ_HI 150*16000
|
|
|
|
#define FREQ_IF 171200 /* 10.7*16000 */
|
|
#define FREQ_STEP 200 /* 12.5*16 */
|
|
|
|
#define FREQ2BITS(x) ((((unsigned int)(x)+FREQ_IF+(FREQ_STEP<<1))\
|
|
/(FREQ_STEP<<2))<<2) /* (x==fmhz*16*1000) -> bits */
|
|
|
|
#define BITS2FREQ(x) ((x) * FREQ_STEP - FREQ_IF)
|
|
|
|
static int radio_nr = -1;
|
|
module_param(radio_nr, int, 0);
|
|
|
|
static int radio_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg);
|
|
|
|
static struct file_operations maestro_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = video_exclusive_open,
|
|
.release = video_exclusive_release,
|
|
.ioctl = radio_ioctl,
|
|
.llseek = no_llseek,
|
|
};
|
|
|
|
static struct video_device maestro_radio=
|
|
{
|
|
.owner = THIS_MODULE,
|
|
.name = "Maestro radio",
|
|
.type = VID_TYPE_TUNER,
|
|
.hardware = VID_HARDWARE_SF16MI,
|
|
.fops = &maestro_fops,
|
|
};
|
|
|
|
static struct radio_device
|
|
{
|
|
__u16 io, /* base of Maestro card radio io (GPIO_DATA)*/
|
|
muted, /* VIDEO_AUDIO_MUTE */
|
|
stereo, /* VIDEO_TUNER_STEREO_ON */
|
|
tuned; /* signal strength (0 or 0xffff) */
|
|
struct semaphore lock;
|
|
} radio_unit = {0, 0, 0, 0, };
|
|
|
|
static __u32 radio_bits_get(struct radio_device *dev)
|
|
{
|
|
register __u16 io=dev->io, l, rdata;
|
|
register __u32 data=0;
|
|
__u16 omask;
|
|
omask = inw(io + IO_MASK);
|
|
outw(~(STR_CLK | STR_WREN), io + IO_MASK);
|
|
outw(0, io);
|
|
udelay(16);
|
|
|
|
for (l=24;l--;) {
|
|
outw(STR_CLK, io); /* HI state */
|
|
udelay(2);
|
|
if(!l)
|
|
dev->tuned = inw(io) & STR_MOST ? 0 : 0xffff;
|
|
outw(0, io); /* LO state */
|
|
udelay(2);
|
|
data <<= 1; /* shift data */
|
|
rdata = inw(io);
|
|
if(!l)
|
|
dev->stereo = rdata & STR_MOST ?
|
|
0 : VIDEO_TUNER_STEREO_ON;
|
|
else
|
|
if(rdata & STR_DATA)
|
|
data++;
|
|
udelay(2);
|
|
}
|
|
if(dev->muted)
|
|
outw(STR_WREN, io);
|
|
udelay(4);
|
|
outw(omask, io + IO_MASK);
|
|
return data & 0x3ffe;
|
|
}
|
|
|
|
static void radio_bits_set(struct radio_device *dev, __u32 data)
|
|
{
|
|
register __u16 io=dev->io, l, bits;
|
|
__u16 omask, odir;
|
|
omask = inw(io + IO_MASK);
|
|
odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
|
|
outw(odir | STR_DATA, io + IO_DIR);
|
|
outw(~(STR_DATA | STR_CLK | STR_WREN), io + IO_MASK);
|
|
udelay(16);
|
|
for (l=25;l;l--) {
|
|
bits = ((data >> 18) & STR_DATA) | STR_WREN ;
|
|
data <<= 1; /* shift data */
|
|
outw(bits, io); /* start strobe */
|
|
udelay(2);
|
|
outw(bits | STR_CLK, io); /* HI level */
|
|
udelay(2);
|
|
outw(bits, io); /* LO level */
|
|
udelay(4);
|
|
}
|
|
if(!dev->muted)
|
|
outw(0, io);
|
|
udelay(4);
|
|
outw(omask, io + IO_MASK);
|
|
outw(odir, io + IO_DIR);
|
|
msleep(125);
|
|
}
|
|
|
|
static inline int radio_function(struct inode *inode, struct file *file,
|
|
unsigned int cmd, void *arg)
|
|
{
|
|
struct video_device *dev = video_devdata(file);
|
|
struct radio_device *card=dev->priv;
|
|
|
|
switch(cmd) {
|
|
case VIDIOCGCAP: {
|
|
struct video_capability *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "Maestro radio");
|
|
v->type=VID_TYPE_TUNER;
|
|
v->channels=v->audios=1;
|
|
return 0;
|
|
}
|
|
case VIDIOCGTUNER: {
|
|
struct video_tuner *v = arg;
|
|
if(v->tuner)
|
|
return -EINVAL;
|
|
(void)radio_bits_get(card);
|
|
v->flags = VIDEO_TUNER_LOW | card->stereo;
|
|
v->signal = card->tuned;
|
|
strcpy(v->name, "FM");
|
|
v->rangelow = FREQ_LO;
|
|
v->rangehigh = FREQ_HI;
|
|
v->mode = VIDEO_MODE_AUTO;
|
|
return 0;
|
|
}
|
|
case VIDIOCSTUNER: {
|
|
struct video_tuner *v = arg;
|
|
if(v->tuner!=0)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
case VIDIOCGFREQ: {
|
|
unsigned long *freq = arg;
|
|
*freq = BITS2FREQ(radio_bits_get(card));
|
|
return 0;
|
|
}
|
|
case VIDIOCSFREQ: {
|
|
unsigned long *freq = arg;
|
|
if (*freq<FREQ_LO || *freq>FREQ_HI )
|
|
return -EINVAL;
|
|
radio_bits_set(card, FREQ2BITS(*freq));
|
|
return 0;
|
|
}
|
|
case VIDIOCGAUDIO: {
|
|
struct video_audio *v = arg;
|
|
memset(v,0,sizeof(*v));
|
|
strcpy(v->name, "Radio");
|
|
v->flags=VIDEO_AUDIO_MUTABLE | card->muted;
|
|
v->mode=VIDEO_SOUND_STEREO;
|
|
return 0;
|
|
}
|
|
case VIDIOCSAUDIO: {
|
|
struct video_audio *v = arg;
|
|
if(v->audio)
|
|
return -EINVAL;
|
|
{
|
|
register __u16 io=card->io;
|
|
register __u16 omask = inw(io + IO_MASK);
|
|
outw(~STR_WREN, io + IO_MASK);
|
|
outw((card->muted = v->flags & VIDEO_AUDIO_MUTE)
|
|
? STR_WREN : 0, io);
|
|
udelay(4);
|
|
outw(omask, io + IO_MASK);
|
|
msleep(125);
|
|
return 0;
|
|
}
|
|
}
|
|
case VIDIOCGUNIT: {
|
|
struct video_unit *v = arg;
|
|
v->video=VIDEO_NO_UNIT;
|
|
v->vbi=VIDEO_NO_UNIT;
|
|
v->radio=dev->minor;
|
|
v->audio=0;
|
|
v->teletext=VIDEO_NO_UNIT;
|
|
return 0;
|
|
}
|
|
default: return -ENOIOCTLCMD;
|
|
}
|
|
}
|
|
|
|
static int radio_ioctl(struct inode *inode, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct video_device *dev = video_devdata(file);
|
|
struct radio_device *card=dev->priv;
|
|
int ret;
|
|
|
|
down(&card->lock);
|
|
ret = video_usercopy(inode, file, cmd, arg, radio_function);
|
|
up(&card->lock);
|
|
return ret;
|
|
}
|
|
|
|
static __u16 radio_install(struct pci_dev *pcidev);
|
|
|
|
MODULE_AUTHOR("Adam Tlalka, atlka@pg.gda.pl");
|
|
MODULE_DESCRIPTION("Radio driver for the Maestro PCI sound card radio.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
static void __exit maestro_radio_exit(void)
|
|
{
|
|
video_unregister_device(&maestro_radio);
|
|
}
|
|
|
|
static int __init maestro_radio_init(void)
|
|
{
|
|
register __u16 found=0;
|
|
struct pci_dev *pcidev = NULL;
|
|
while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS,
|
|
PCI_DEVICE_ID_ESS_ESS1968,
|
|
pcidev)))
|
|
found |= radio_install(pcidev);
|
|
while(!found && (pcidev = pci_find_device(PCI_VENDOR_ESS,
|
|
PCI_DEVICE_ID_ESS_ESS1978,
|
|
pcidev)))
|
|
found |= radio_install(pcidev);
|
|
if(!found) {
|
|
printk(KERN_INFO "radio-maestro: no devices found.\n");
|
|
return -ENODEV;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
module_init(maestro_radio_init);
|
|
module_exit(maestro_radio_exit);
|
|
|
|
static inline __u16 radio_power_on(struct radio_device *dev)
|
|
{
|
|
register __u16 io=dev->io;
|
|
register __u32 ofreq;
|
|
__u16 omask, odir;
|
|
omask = inw(io + IO_MASK);
|
|
odir = (inw(io + IO_DIR) & ~STR_DATA) | (STR_CLK | STR_WREN);
|
|
outw(odir & ~STR_WREN, io + IO_DIR);
|
|
dev->muted = inw(io) & STR_WREN ? 0 : VIDEO_AUDIO_MUTE;
|
|
outw(odir, io + IO_DIR);
|
|
outw(~(STR_WREN | STR_CLK), io + IO_MASK);
|
|
outw(dev->muted ? 0 : STR_WREN, io);
|
|
udelay(16);
|
|
outw(omask, io + IO_MASK);
|
|
ofreq = radio_bits_get(dev);
|
|
if((ofreq<FREQ2BITS(FREQ_LO)) || (ofreq>FREQ2BITS(FREQ_HI)))
|
|
ofreq = FREQ2BITS(FREQ_LO);
|
|
radio_bits_set(dev, ofreq);
|
|
return (ofreq == radio_bits_get(dev));
|
|
}
|
|
|
|
static __u16 radio_install(struct pci_dev *pcidev)
|
|
{
|
|
if(((pcidev->class >> 8) & 0xffff) != PCI_CLASS_MULTIMEDIA_AUDIO)
|
|
return 0;
|
|
|
|
radio_unit.io = pcidev->resource[0].start + GPIO_DATA;
|
|
maestro_radio.priv = &radio_unit;
|
|
init_MUTEX(&radio_unit.lock);
|
|
|
|
if(radio_power_on(&radio_unit)) {
|
|
if(video_register_device(&maestro_radio, VFL_TYPE_RADIO, radio_nr)==-1) {
|
|
printk("radio-maestro: can't register device!");
|
|
return 0;
|
|
}
|
|
printk(KERN_INFO "radio-maestro: version "
|
|
DRIVER_VERSION
|
|
" time "
|
|
__TIME__ " "
|
|
__DATE__
|
|
"\n");
|
|
printk(KERN_INFO "radio-maestro: radio chip initialized\n");
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|
|
|