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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Linus Nielsen Feltzing
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "i2c.h"
#include "debug.h"
#include "mas.h"
/* note: 'len' is number of 32-bit words, not number of bytes! */
int mas_readmem(int bank, int addr, unsigned long* dest, int len)
{
int i;
unsigned char buf[16];
i=0;
buf[i++] = MAS_DATA_WRITE;
buf[i++] = bank?0xf0:0xe0;
buf[i++] = 0x00;
buf[i++] = (len & 0xff00) >> 8;
buf[i++] = len & 0xff;
buf[i++] = (addr & 0xff00) >> 8;
buf[i++] = addr & 0xff;
/* send read command */
if (i2c_write(MAS_DEV_WRITE,buf,i))
{
return -1;
}
return mas_devread(dest, len);
}
/* note: 'len' is number of 32-bit words, not number of bytes! */
int mas_writemem(int bank, int addr, unsigned long* src, int len)
{
int i, j;
unsigned char buf[60];
unsigned char* ptr = (unsigned char*)src;
i=0;
buf[i++] = MAS_DATA_WRITE;
buf[i++] = bank;
buf[i++] = 0x00;
buf[i++] = (len & 0xff00) >> 8;
buf[i++] = len & 0xff;
buf[i++] = (addr & 0xff00) >> 8;
buf[i++] = addr & 0xff;
j = 0;
while(len--) {
buf[i++] = ptr[j*4+1];
buf[i++] = ptr[j*4+0];
buf[i++] = 0;
buf[i++] = ptr[j*4+2];
j += 4;
}
/* send write command */
if (i2c_write(MAS_DEV_WRITE,buf,i))
{
return -1;
}
return 0;
}
int mas_readreg(int reg)
{
int i;
unsigned char buf[16];
i=0;
buf[i++] = MAS_DATA_WRITE;
buf[i++] = 0xd0 | reg >> 4;
buf[i++] = (reg & 0x0f) << 4;
/* send read command */
if (i2c_write(MAS_DEV_WRITE,buf,i))
{
return -1;
}
if(mas_devread((unsigned long *)buf, 1))
{
return -2;
}
return buf[0] | buf[1] << 8 | buf[3] << 16;
}
int mas_writereg(int reg, unsigned short val)
{
int i;
unsigned char buf[16];
i=0;
buf[i++] = MAS_DATA_WRITE;
buf[i++] = 0x90 | reg >> 4;
buf[i++] = ((reg & 0x0f) << 4) | (val & 0x0f);
buf[i++] = (val >> 12) & 0xff;
buf[i++] = (val >> 4) & 0xff;
/* send write command */
if (i2c_write(MAS_DEV_WRITE,buf,i))
{
return -1;
}
return 0;
}
/* note: 'len' is number of 32-bit words, not number of bytes! */
int mas_devread(unsigned long *dest, int len)
{
unsigned char* ptr = (unsigned char*)dest;
int ret = 0;
int i;
/* handle read-back */
i2c_start();
i2c_outb(MAS_DEV_WRITE);
if (i2c_getack()) {
i2c_outb(MAS_DATA_READ);
if (i2c_getack()) {
i2c_start();
i2c_outb(MAS_DEV_READ);
if (i2c_getack()) {
for (i=0;len;i++) {
len--;
ptr[i*4+1] = i2c_inb(0);
ptr[i*4+0] = i2c_inb(0);
ptr[i*4+3] = i2c_inb(0);
if(len)
ptr[i*4+2] = i2c_inb(0);
else
ptr[i*4+2] = i2c_inb(1); /* NAK the last byte */
}
}
else
ret = -3;
}
else
ret = -2;
}
else
ret = -1;
i2c_stop();
return ret;
}
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