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// 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)) & 0xFF;
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 & 0x0F); // ADDR
value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA
} 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 & 0x0F); // ADDR
ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA
} 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, 0x55);
zrdev_dbg(zr, "%s: registers: ", ptr->name);
for (i = 0; i <= 0x0b; 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, 0x00);
if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) {
zrdev_err(zr, "%s: attach failed, can't connect to vfe processor!\n", ptr->name);
return -ENXIO;
}
zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0);
if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) {
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 & 0x0c) {
zrdev_err(zr, "%s: attach failed, suspicious version %d found...\n", ptr->name,
ptr->version);
return -ENXIO;
}
return 0; /* looks good! */
}
/* =========================================================================
Local helper function:
simple loop for pushing the init datasets - NO USE --
========================================================================= */
#if 0
static int zr36016_pushit(struct zr36016 *ptr,
u16 startreg,
u16 len,
const char *data)
{
struct zoran *zr = videocodec_to_zoran(ptr->codec);
int i = 0;
zrdev_dbg(zr, "%s: write data block to 0x%04x (len=%d)\n",
ptr->name, startreg, len);
while (i < len) {
zr36016_writei(ptr, startreg++, data[i++]);
}
return i;
}
#endif
/* =========================================================================
Basic datasets & init:
//TODO//
========================================================================= */
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 & 0xFF);
zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8);
zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF);
zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8);
zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF);
zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8);
zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF);
/* shall we continue now, please? */
zr36016_write(ptr, ZR016_GOSTOP, 1);
}
/* =========================================================================
CODEC API FUNCTIONS
this 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, %d/%d-%dx%d (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 & 0xff) == 1) ? 0 : 1;
ptr->ydec = (((cap->decimation >> 8) & 0xff) == 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 = 0L, /* 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);
}
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