// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Zoran ZR36016 basic configuration functions
*
* Copyright ( C ) 2001 Wolfgang Scherr < scherr @ net4you . at >
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
/* headerfile of this module */
#include "zr36016.h"
/* codec io API */
#include "videocodec.h"
/*
* it doesn ' t make sense to have more than 20 or so ,
* just to prevent some unwanted loops
*/
#define MAX_CODECS 20
/* amount of chips attached via this driver */
static int zr36016_codecs;
/*
* Local hardware I / O functions : read / write via codec layer
* ( registers are located in the master device )
*/
/* read and write functions */
static u8 zr36016_read(struct zr36016 *ptr, u16 reg)
{
u8 value = 0 ;
struct zoran *zr = videocodec_to_zoran(ptr->codec);
/* just in case something is wrong... */
if (ptr->codec->master_data->readreg)
value = (ptr->codec->master_data->readreg(ptr->codec, reg)) & 0 xFF;
else
zrdev_err(zr, "%s: invalid I/O setup, nothing read!\n" , ptr->name);
zrdev_dbg(zr, "%s: reading from 0x%04x: %02x\n" , ptr->name, reg, value);
return value;
}
static void zr36016_write(struct zr36016 *ptr, u16 reg, u8 value)
{
struct zoran *zr = videocodec_to_zoran(ptr->codec);
zrdev_dbg(zr, "%s: writing 0x%02x to 0x%04x\n" , ptr->name, value, reg);
// just in case something is wrong...
if (ptr->codec->master_data->writereg)
ptr->codec->master_data->writereg(ptr->codec, reg, value);
else
zrdev_err(zr, "%s: invalid I/O setup, nothing written!\n" , ptr->name);
}
/*
* indirect read and write functions
*
* the 016 supports auto - addr - increment , but
* writing it all time cost not much and is safer . . .
*/
static u8 zr36016_readi(struct zr36016 *ptr, u16 reg)
{
u8 value = 0 ;
struct zoran *zr = videocodec_to_zoran(ptr->codec);
/* just in case something is wrong... */
if ((ptr->codec->master_data->writereg) && (ptr->codec->master_data->readreg)) {
ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0 x0F);
value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0 xFF;
} else {
zrdev_err(zr, "%s: invalid I/O setup, nothing read (i)!\n" , ptr->name);
}
zrdev_dbg(zr, "%s: reading indirect from 0x%04x: %02x\n" ,
ptr->name, reg, value);
return value;
}
static void zr36016_writei(struct zr36016 *ptr, u16 reg, u8 value)
{
struct zoran *zr = videocodec_to_zoran(ptr->codec);
zrdev_dbg(zr, "%s: writing indirect 0x%02x to 0x%04x\n" , ptr->name,
value, reg);
/* just in case something is wrong... */
if (ptr->codec->master_data->writereg) {
ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0 x0F);
ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0 x0FF);
} else {
zrdev_err(zr, "%s: invalid I/O setup, nothing written (i)!\n" , ptr->name);
}
}
/* Local helper function: version read */
/* version kept in datastructure */
static u8 zr36016_read_version(struct zr36016 *ptr)
{
ptr->version = zr36016_read(ptr, 0 ) >> 4 ;
return ptr->version;
}
/*
* Local helper function : basic test of " connectivity " , writes / reads
* to / from PAX - Lo register
*/
static int zr36016_basic_test(struct zr36016 *ptr)
{
struct zoran *zr = videocodec_to_zoran(ptr->codec);
if (*KERN_INFO <= CONSOLE_LOGLEVEL_DEFAULT) {
int i;
zr36016_writei(ptr, ZR016I_PAX_LO, 0 x55);
zrdev_dbg(zr, "%s: registers: " , ptr->name);
for (i = 0 ; i <= 0 x0b; i++)
zrdev_dbg(zr, "%02x " , zr36016_readi(ptr, i));
zrdev_dbg(zr, "\n" );
}
// for testing just write 0, then the default value to a register and read
// it back in both cases
zr36016_writei(ptr, ZR016I_PAX_LO, 0 x00);
if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0 x0) {
zrdev_err(zr, "%s: attach failed, can't connect to vfe processor!\n" , ptr->name);
return -ENXIO;
}
zr36016_writei(ptr, ZR016I_PAX_LO, 0 x0d0);
if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0 x0d0) {
zrdev_err(zr, "%s: attach failed, can't connect to vfe processor!\n" , ptr->name);
return -ENXIO;
}
// we allow version numbers from 0-3, should be enough, though
zr36016_read_version(ptr);
if (ptr->version & 0 x0c) {
zrdev_err(zr, "%s: attach failed, suspicious version %d found...\n" , ptr->name,
ptr->version);
return -ENXIO;
}
return 0 ; /* looks good! */
}
/* Basic datasets & init */
static void zr36016_init(struct zr36016 *ptr)
{
// stop any processing
zr36016_write(ptr, ZR016_GOSTOP, 0 );
// mode setup (yuv422 in and out, compression/expansuon due to mode)
zr36016_write(ptr, ZR016_MODE,
ZR016_YUV422 | ZR016_YUV422_YUV422 |
(ptr->mode == CODEC_DO_COMPRESSION ?
ZR016_COMPRESSION : ZR016_EXPANSION));
// misc setup
zr36016_writei(ptr, ZR016I_SETUP1,
(ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0 ) |
(ptr->ydec ? ZR016_VERT : 0 ) | ZR016_CNTI);
zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR);
// Window setup
// (no extra offset for now, norm defines offset, default width height)
zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8 );
zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0 xFF);
zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8 );
zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0 xFF);
zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8 );
zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0 xFF);
zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8 );
zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0 xFF);
/* shall we continue now, please? */
zr36016_write(ptr, ZR016_GOSTOP, 1 );
}
/*
* CODEC API FUNCTIONS
*
* These functions are accessed by the master via the API structure
*/
/*
* set compression / expansion mode and launches codec -
* this should be the last call from the master before starting processing
*/
static int zr36016_set_mode(struct videocodec *codec, int mode)
{
struct zr36016 *ptr = (struct zr36016 *)codec->data;
struct zoran *zr = videocodec_to_zoran(codec);
zrdev_dbg(zr, "%s: set_mode %d call\n" , ptr->name, mode);
if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION))
return -EINVAL;
ptr->mode = mode;
zr36016_init(ptr);
return 0 ;
}
/* set picture size */
static int zr36016_set_video(struct videocodec *codec, const struct tvnorm *norm,
struct vfe_settings *cap, struct vfe_polarity *pol)
{
struct zr36016 *ptr = (struct zr36016 *)codec->data;
struct zoran *zr = videocodec_to_zoran(codec);
zrdev_dbg(zr, "%s: set_video %d.%d, (%u,%u)/%ux%u (0x%x) call\n" ,
ptr->name, norm->h_start, norm->v_start,
cap->x, cap->y, cap->width, cap->height,
cap->decimation);
/*
* if ( ) return - EINVAL ;
* trust the master driver that it knows what it does - so
* we allow invalid startx / y for now . . .
*/
ptr->width = cap->width;
ptr->height = cap->height;
/*
* ( Ronald ) This is ugly . zoran_device . c , line 387
* already mentions what happens if h_start is even
* ( blue faces , etc . , cr / cb inversed ) . There ' s probably
* some good reason why h_start is 0 instead of 1 , so I ' m
* leaving it to this for now , but really . . . This can be
* done a lot simpler
*/
ptr->xoff = (norm->h_start ? norm->h_start : 1 ) + cap->x;
/*
* Something to note here ( I don ' t understand it ) , setting
* v_start too high will cause the codec to ' not work ' . I
* really don ' t get it . values of 16 ( v_start ) already break
* it here . Just ' 0 ' seems to work . More testing needed !
*/
ptr->yoff = norm->v_start + cap->y;
/* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */
ptr->xdec = ((cap->decimation & 0 xff) == 1 ) ? 0 : 1 ;
ptr->ydec = (((cap->decimation >> 8 ) & 0 xff) == 1 ) ? 0 : 1 ;
return 0 ;
}
/* additional control functions */
static int zr36016_control(struct videocodec *codec, int type, int size, void *data)
{
struct zr36016 *ptr = (struct zr36016 *)codec->data;
struct zoran *zr = videocodec_to_zoran(codec);
int *ival = (int *)data;
zrdev_dbg(zr, "%s: control %d call with %d byte\n" ,
ptr->name, type, size);
switch (type) {
case CODEC_G_STATUS: /* get last status - we don't know it ... */
if (size != sizeof (int ))
return -EFAULT;
*ival = 0 ;
break ;
case CODEC_G_CODEC_MODE:
if (size != sizeof (int ))
return -EFAULT;
*ival = 0 ;
break ;
case CODEC_S_CODEC_MODE:
if (size != sizeof (int ))
return -EFAULT;
if (*ival != 0 )
return -EINVAL;
/* not needed, do nothing */
return 0 ;
case CODEC_G_VFE:
case CODEC_S_VFE:
return 0 ;
case CODEC_S_MMAP:
/* not available, give an error */
return -ENXIO;
default :
return -EINVAL;
}
return size;
}
/*
* Exit and unregister function :
*
* Deinitializes Zoran ' s JPEG processor
*/
static int zr36016_unset(struct videocodec *codec)
{
struct zr36016 *ptr = codec->data;
struct zoran *zr = videocodec_to_zoran(codec);
if (ptr) {
/* do wee need some codec deinit here, too ???? */
zrdev_dbg(zr, "%s: finished codec #%d\n" , ptr->name, ptr->num);
kfree(ptr);
codec->data = NULL;
zr36016_codecs--;
return 0 ;
}
return -EFAULT;
}
/*
* Setup and registry function :
*
* Initializes Zoran ' s JPEG processor
*
* Also sets pixel size , average code size , mode ( compr . / decompr . )
* ( the given size is determined by the processor with the video interface )
*/
static int zr36016_setup(struct videocodec *codec)
{
struct zr36016 *ptr;
struct zoran *zr = videocodec_to_zoran(codec);
int res;
zrdev_dbg(zr, "zr36016: initializing VFE subsystem #%d.\n" , zr36016_codecs);
if (zr36016_codecs == MAX_CODECS) {
zrdev_err(zr, "zr36016: Can't attach more codecs!\n" );
return -ENOSPC;
}
//mem structure init
ptr = kzalloc(sizeof (*ptr), GFP_KERNEL);
codec->data = ptr;
if (!ptr)
return -ENOMEM;
snprintf(ptr->name, sizeof (ptr->name), "zr36016[%d]" , zr36016_codecs);
ptr->num = zr36016_codecs++;
ptr->codec = codec;
//testing
res = zr36016_basic_test(ptr);
if (res < 0 ) {
zr36016_unset(codec);
return res;
}
//final setup
ptr->mode = CODEC_DO_COMPRESSION;
ptr->width = 768 ;
ptr->height = 288 ;
ptr->xdec = 1 ;
ptr->ydec = 0 ;
zr36016_init(ptr);
zrdev_dbg(zr, "%s: codec v%d attached and running\n" ,
ptr->name, ptr->version);
return 0 ;
}
static const struct videocodec zr36016_codec = {
.name = "zr36016" ,
.magic = 0 L, /* magic not used */
.flags =
CODEC_FLAG_HARDWARE | CODEC_FLAG_VFE | CODEC_FLAG_ENCODER |
CODEC_FLAG_DECODER,
.type = CODEC_TYPE_ZR36016,
.setup = zr36016_setup, /* functionality */
.unset = zr36016_unset,
.set_mode = zr36016_set_mode,
.set_video = zr36016_set_video,
.control = zr36016_control,
/* others are not used */
};
/* HOOK IN DRIVER AS KERNEL MODULE */
int zr36016_init_module(void )
{
zr36016_codecs = 0 ;
return videocodec_register(&zr36016_codec);
}
void zr36016_cleanup_module(void )
{
if (zr36016_codecs) {
pr_debug("zr36016: something's wrong - %d codecs left somehow.\n" ,
zr36016_codecs);
}
videocodec_unregister(&zr36016_codec);
}
Messung V0.5 in Prozent C=96 H=96 G=95
¤ Dauer der Verarbeitung: 0.9 Sekunden
¤
*© Formatika GbR, Deutschland