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