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linux/drivers/media/radio/radio-maestro.c
Jesper Juhl 77933d7276 [PATCH] clean up inline static vs static inline 
`gcc -W' likes to complain if the static keyword is not at the beginning of
the declaration.  This patch fixes all remaining occurrences of "inline
static" up with "static inline" in the entire kernel tree (140 occurrences in
47 files).

While making this change I came across a few lines with trailing whitespace
that I also fixed up, I have also added or removed a blank line or two here
and there, but there are no functional changes in the patch.

Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-07-27 16:26:20 -07:00

333 lines
8.6 KiB
C
Raw Blame History

/* 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;
}
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