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/**************************************************************************
*
* Copyright (c) 2013 Alcatel-Lucent
*
* Alcatel Lucent licenses this file to You under the Apache License,
* Version 2.0 (the "License"); you may not use this file except in
* compliance with the License. A copy of the License is contained the
* file LICENSE at the top level of this repository.
* You may also obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
**************************************************************************
*
* i2c.c:
*
* This file contains all of the generic code to support a target
* with one or more I-Squared-C interface masters.
* It assumes that somewhere in target-specific space there are three
* i2c interface functions: i2cRead(), i2cWrite() and i2cCtrl().
*
* Original author: Ed Sutter (ed.sutter@alcatel-lucent.com)
*
*/
#include "config.h"
#include "cli.h"
#include "i2c.h"
#include "genlib.h"
#include "stddefs.h"
int i2cVerbose;
char *I2cHelp[] = {
"I-Squared-C Interface Access",
"[options] {init | show | read addr len | write addr data}",
#if INCLUDE_VERBOSEHELP
"Options:",
" -b burst",
" -i{##} interface",
" -w{data} pre-write data as part of read (uses repeated start)",
" -v verbose",
#endif
0,
};
int
I2cCmd(int argc, char *argv[])
{
char *next;
uchar buf[256];
int i, wtot, opt, interface, len, rslt, addr, burst, ret, rwctrl;
rslt = 0;
wtot = 0;
burst = 0;
rwctrl = 0;
interface = 0;
i2cVerbose = 0;
ret = CMD_SUCCESS;
while ((opt=getopt(argc,argv,"bi:vw:")) != -1) {
switch(opt) {
case 'i':
interface = atoi(optarg);
break;
case 'b':
burst = 1; /* Do multiple accesses within one START/STOP */
break;
case 'w': /* Pre-write in a read */
burst = 1;
rwctrl = REPEATED_START;
for(wtot=1;wtot<sizeof(buf);wtot++) {
buf[wtot] = (uchar)strtol(optarg,&next,0);
if (*next == ',')
optarg = next+1;
else
break;
}
buf[0] = wtot;
break;
case 'v':
i2cVerbose = 1;
break;
default:
return(CMD_FAILURE);
}
}
if (argc < (optind+1))
return(CMD_PARAM_ERROR);
if (strcmp(argv[optind],"read") == 0) {
if (argc != (optind+3))
return(CMD_PARAM_ERROR);
addr = strtol(argv[optind+1],0,0);
len = strtol(argv[optind+2],0,0);
if (len > sizeof(buf))
len = sizeof(buf);
if (burst) {
addr |= rwctrl;
rslt = i2cRead(interface,addr,buf,len);
}
else {
for(i=0;i<len;i++) {
rslt = i2cRead(interface,addr,buf+i,1);
if (rslt < 0)
break;
}
}
if (rslt < 0) {
printf("i2cRead = %d\n",rslt);
ret = CMD_FAILURE;
}
else
printMem(buf,len,1);
}
else if (strcmp(argv[optind],"write") == 0) {
if (rwctrl == REPEATED_START) {
printf("-w applies to read only\n");
return(CMD_FAILURE);
}
if (argc < (optind+3))
return(CMD_PARAM_ERROR);
addr = strtol(argv[optind+1],0,0);
for(len=0,i=optind+2;i<argc;i++,len++)
buf[len] = (uchar)strtol(argv[i],0,0);
if (burst) {
rslt = i2cWrite(interface,addr,buf,len);
}
else {
for(i=0;i<len;i++) {
rslt = i2cWrite(interface,addr,buf+i,1);
if (rslt < 0)
break;
}
}
if (rslt < 0) {
printf("i2cWrite = %d\n",rslt);
ret = CMD_FAILURE;
}
}
else if (strcmp(argv[optind],"init") == 0) {
i2cCtrl(interface,I2CCTRL_INIT,0,0);
}
else if (strcmp(argv[optind],"show") == 0) {
i2cCtrl(interface,I2CCTRL_SHOW,0,0);
}
else
return(CMD_PARAM_ERROR);
i2cVerbose = 0;
return(ret);
}
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