533 lines
14 KiB
C
533 lines
14 KiB
C
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/*
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* Zoran ZR36016 basic configuration functions
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*
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* Copyright (C) 2001 Wolfgang Scherr <scherr@net4you.at>
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*
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* $Id: zr36016.c,v 1.1.2.14 2003/08/20 19:46:55 rbultje Exp $
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*
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* ------------------------------------------------------------------------
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* ------------------------------------------------------------------------
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*/
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#define ZR016_VERSION "v0.7"
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#include <linux/version.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/delay.h>
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#include <linux/types.h>
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#include <linux/wait.h>
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/* includes for structures and defines regarding video
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#include<linux/videodev.h> */
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/* I/O commands, error codes */
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#include<asm/io.h>
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//#include<errno.h>
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/* v4l API */
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#include<linux/videodev.h>
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/* headerfile of this module */
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#include"zr36016.h"
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/* codec io API */
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#include"videocodec.h"
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/* it doesn't make sense to have more than 20 or so,
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just to prevent some unwanted loops */
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#define MAX_CODECS 20
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/* amount of chips attached via this driver */
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static int zr36016_codecs = 0;
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/* debugging is available via module parameter */
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static int debug = 0;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0-4)");
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#define dprintk(num, format, args...) \
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do { \
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if (debug >= num) \
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printk(format, ##args); \
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} while (0)
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/* =========================================================================
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Local hardware I/O functions:
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read/write via codec layer (registers are located in the master device)
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========================================================================= */
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/* read and write functions */
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static u8
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zr36016_read (struct zr36016 *ptr,
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u16 reg)
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{
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u8 value = 0;
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// just in case something is wrong...
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if (ptr->codec->master_data->readreg)
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value =
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(ptr->codec->master_data->
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readreg(ptr->codec, reg)) & 0xFF;
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else
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dprintk(1,
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KERN_ERR "%s: invalid I/O setup, nothing read!\n",
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ptr->name);
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dprintk(4, "%s: reading from 0x%04x: %02x\n", ptr->name, reg,
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value);
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return value;
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}
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static void
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zr36016_write (struct zr36016 *ptr,
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u16 reg,
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u8 value)
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{
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dprintk(4, "%s: writing 0x%02x to 0x%04x\n", ptr->name, value,
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reg);
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// just in case something is wrong...
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if (ptr->codec->master_data->writereg) {
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ptr->codec->master_data->writereg(ptr->codec, reg, value);
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} else
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dprintk(1,
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KERN_ERR
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"%s: invalid I/O setup, nothing written!\n",
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ptr->name);
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}
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/* indirect read and write functions */
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/* the 016 supports auto-addr-increment, but
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* writing it all time cost not much and is safer... */
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static u8
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zr36016_readi (struct zr36016 *ptr,
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u16 reg)
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{
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u8 value = 0;
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// just in case something is wrong...
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if ((ptr->codec->master_data->writereg) &&
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(ptr->codec->master_data->readreg)) {
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ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
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value = (ptr->codec->master_data->readreg(ptr->codec, ZR016_IDATA)) & 0xFF; // DATA
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} else
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dprintk(1,
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KERN_ERR
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"%s: invalid I/O setup, nothing read (i)!\n",
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ptr->name);
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dprintk(4, "%s: reading indirect from 0x%04x: %02x\n", ptr->name,
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reg, value);
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return value;
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}
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static void
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zr36016_writei (struct zr36016 *ptr,
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u16 reg,
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u8 value)
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{
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dprintk(4, "%s: writing indirect 0x%02x to 0x%04x\n", ptr->name,
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value, reg);
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// just in case something is wrong...
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if (ptr->codec->master_data->writereg) {
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ptr->codec->master_data->writereg(ptr->codec, ZR016_IADDR, reg & 0x0F); // ADDR
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ptr->codec->master_data->writereg(ptr->codec, ZR016_IDATA, value & 0x0FF); // DATA
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} else
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dprintk(1,
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KERN_ERR
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"%s: invalid I/O setup, nothing written (i)!\n",
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ptr->name);
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}
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/* =========================================================================
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Local helper function:
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version read
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========================================================================= */
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/* version kept in datastructure */
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static u8
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zr36016_read_version (struct zr36016 *ptr)
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{
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ptr->version = zr36016_read(ptr, 0) >> 4;
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return ptr->version;
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}
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/* =========================================================================
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Local helper function:
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basic test of "connectivity", writes/reads to/from PAX-Lo register
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========================================================================= */
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static int
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zr36016_basic_test (struct zr36016 *ptr)
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{
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if (debug) {
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int i;
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zr36016_writei(ptr, ZR016I_PAX_LO, 0x55);
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dprintk(1, KERN_INFO "%s: registers: ", ptr->name);
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for (i = 0; i <= 0x0b; i++)
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dprintk(1, "%02x ", zr36016_readi(ptr, i));
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dprintk(1, "\n");
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}
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// for testing just write 0, then the default value to a register and read
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// it back in both cases
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zr36016_writei(ptr, ZR016I_PAX_LO, 0x00);
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if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0) {
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dprintk(1,
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KERN_ERR
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"%s: attach failed, can't connect to vfe processor!\n",
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ptr->name);
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return -ENXIO;
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}
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zr36016_writei(ptr, ZR016I_PAX_LO, 0x0d0);
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if (zr36016_readi(ptr, ZR016I_PAX_LO) != 0x0d0) {
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dprintk(1,
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KERN_ERR
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"%s: attach failed, can't connect to vfe processor!\n",
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ptr->name);
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return -ENXIO;
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}
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// we allow version numbers from 0-3, should be enough, though
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zr36016_read_version(ptr);
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if (ptr->version & 0x0c) {
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dprintk(1,
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KERN_ERR
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"%s: attach failed, suspicious version %d found...\n",
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ptr->name, ptr->version);
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return -ENXIO;
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}
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return 0; /* looks good! */
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}
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/* =========================================================================
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Local helper function:
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simple loop for pushing the init datasets - NO USE --
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========================================================================= */
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#if 0
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static int zr36016_pushit (struct zr36016 *ptr,
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u16 startreg,
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u16 len,
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const char *data)
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{
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int i=0;
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dprintk(4, "%s: write data block to 0x%04x (len=%d)\n",
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ptr->name, startreg,len);
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while (i<len) {
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zr36016_writei(ptr, startreg++, data[i++]);
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}
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return i;
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}
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#endif
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/* =========================================================================
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Basic datasets & init:
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//TODO//
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========================================================================= */
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// needed offset values PAL NTSC SECAM
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static const int zr016_xoff[] = { 20, 20, 20 };
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static const int zr016_yoff[] = { 8, 9, 7 };
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static void
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zr36016_init (struct zr36016 *ptr)
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{
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// stop any processing
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zr36016_write(ptr, ZR016_GOSTOP, 0);
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// mode setup (yuv422 in and out, compression/expansuon due to mode)
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zr36016_write(ptr, ZR016_MODE,
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ZR016_YUV422 | ZR016_YUV422_YUV422 |
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(ptr->mode == CODEC_DO_COMPRESSION ?
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ZR016_COMPRESSION : ZR016_EXPANSION));
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// misc setup
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zr36016_writei(ptr, ZR016I_SETUP1,
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(ptr->xdec ? (ZR016_HRFL | ZR016_HORZ) : 0) |
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(ptr->ydec ? ZR016_VERT : 0) | ZR016_CNTI);
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zr36016_writei(ptr, ZR016I_SETUP2, ZR016_CCIR);
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// Window setup
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// (no extra offset for now, norm defines offset, default width height)
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zr36016_writei(ptr, ZR016I_PAX_HI, ptr->width >> 8);
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zr36016_writei(ptr, ZR016I_PAX_LO, ptr->width & 0xFF);
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zr36016_writei(ptr, ZR016I_PAY_HI, ptr->height >> 8);
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zr36016_writei(ptr, ZR016I_PAY_LO, ptr->height & 0xFF);
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zr36016_writei(ptr, ZR016I_NAX_HI, ptr->xoff >> 8);
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zr36016_writei(ptr, ZR016I_NAX_LO, ptr->xoff & 0xFF);
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zr36016_writei(ptr, ZR016I_NAY_HI, ptr->yoff >> 8);
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zr36016_writei(ptr, ZR016I_NAY_LO, ptr->yoff & 0xFF);
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/* shall we continue now, please? */
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zr36016_write(ptr, ZR016_GOSTOP, 1);
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}
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/* =========================================================================
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CODEC API FUNCTIONS
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this functions are accessed by the master via the API structure
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========================================================================= */
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/* set compression/expansion mode and launches codec -
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this should be the last call from the master before starting processing */
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static int
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zr36016_set_mode (struct videocodec *codec,
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int mode)
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{
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struct zr36016 *ptr = (struct zr36016 *) codec->data;
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dprintk(2, "%s: set_mode %d call\n", ptr->name, mode);
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if ((mode != CODEC_DO_EXPANSION) && (mode != CODEC_DO_COMPRESSION))
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return -EINVAL;
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ptr->mode = mode;
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zr36016_init(ptr);
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return 0;
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}
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/* set picture size */
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static int
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zr36016_set_video (struct videocodec *codec,
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struct tvnorm *norm,
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struct vfe_settings *cap,
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struct vfe_polarity *pol)
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{
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struct zr36016 *ptr = (struct zr36016 *) codec->data;
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dprintk(2, "%s: set_video %d.%d, %d/%d-%dx%d (0x%x) call\n",
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ptr->name, norm->HStart, norm->VStart,
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cap->x, cap->y, cap->width, cap->height,
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cap->decimation);
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/* if () return -EINVAL;
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* trust the master driver that it knows what it does - so
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* we allow invalid startx/y for now ... */
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ptr->width = cap->width;
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ptr->height = cap->height;
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/* (Ronald) This is ugly. zoran_device.c, line 387
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* already mentions what happens if HStart is even
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* (blue faces, etc., cr/cb inversed). There's probably
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* some good reason why HStart is 0 instead of 1, so I'm
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* leaving it to this for now, but really... This can be
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* done a lot simpler */
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ptr->xoff = (norm->HStart ? norm->HStart : 1) + cap->x;
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/* Something to note here (I don't understand it), setting
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* VStart too high will cause the codec to 'not work'. I
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* really don't get it. values of 16 (VStart) already break
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* it here. Just '0' seems to work. More testing needed! */
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ptr->yoff = norm->VStart + cap->y;
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/* (Ronald) dzjeeh, can't this thing do hor_decimation = 4? */
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ptr->xdec = ((cap->decimation & 0xff) == 1) ? 0 : 1;
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ptr->ydec = (((cap->decimation >> 8) & 0xff) == 1) ? 0 : 1;
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return 0;
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}
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/* additional control functions */
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static int
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zr36016_control (struct videocodec *codec,
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int type,
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int size,
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void *data)
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{
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struct zr36016 *ptr = (struct zr36016 *) codec->data;
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int *ival = (int *) data;
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dprintk(2, "%s: control %d call with %d byte\n", ptr->name, type,
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size);
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switch (type) {
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case CODEC_G_STATUS: /* get last status - we don't know it ... */
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if (size != sizeof(int))
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|
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;
|
||
|
|
|
||
|
|
if (ptr) {
|
||
|
|
/* do wee need some codec deinit here, too ???? */
|
||
|
|
|
||
|
|
dprintk(1, "%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;
|
||
|
|
int res;
|
||
|
|
|
||
|
|
dprintk(2, "zr36016: initializing VFE subsystem #%d.\n",
|
||
|
|
zr36016_codecs);
|
||
|
|
|
||
|
|
if (zr36016_codecs == MAX_CODECS) {
|
||
|
|
dprintk(1,
|
||
|
|
KERN_ERR "zr36016: Can't attach more codecs!\n");
|
||
|
|
return -ENOSPC;
|
||
|
|
}
|
||
|
|
//mem structure init
|
||
|
|
codec->data = ptr = kmalloc(sizeof(struct zr36016), GFP_KERNEL);
|
||
|
|
if (NULL == ptr) {
|
||
|
|
dprintk(1, KERN_ERR "zr36016: Can't get enough memory!\n");
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
memset(ptr, 0, sizeof(struct zr36016));
|
||
|
|
|
||
|
|
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);
|
||
|
|
|
||
|
|
dprintk(1, KERN_INFO "%s: codec v%d attached and running\n",
|
||
|
|
ptr->name, ptr->version);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct videocodec zr36016_codec = {
|
||
|
|
.owner = THIS_MODULE,
|
||
|
|
.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
|
||
|
|
========================================================================= */
|
||
|
|
|
||
|
|
static int __init
|
||
|
|
zr36016_init_module (void)
|
||
|
|
{
|
||
|
|
//dprintk(1, "ZR36016 driver %s\n",ZR016_VERSION);
|
||
|
|
zr36016_codecs = 0;
|
||
|
|
return videocodec_register(&zr36016_codec);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void __exit
|
||
|
|
zr36016_cleanup_module (void)
|
||
|
|
{
|
||
|
|
if (zr36016_codecs) {
|
||
|
|
dprintk(1,
|
||
|
|
"zr36016: something's wrong - %d codecs left somehow.\n",
|
||
|
|
zr36016_codecs);
|
||
|
|
}
|
||
|
|
videocodec_unregister(&zr36016_codec);
|
||
|
|
}
|
||
|
|
|
||
|
|
module_init(zr36016_init_module);
|
||
|
|
module_exit(zr36016_cleanup_module);
|
||
|
|
|
||
|
|
MODULE_AUTHOR("Wolfgang Scherr <scherr@net4you.at>");
|
||
|
|
MODULE_DESCRIPTION("Driver module for ZR36016 video frontends "
|
||
|
|
ZR016_VERSION);
|
||
|
|
MODULE_LICENSE("GPL");
|