I2C master mode implemented and more decoding

[rsbs2] / bmc / ipmb.c

diff --git a/bmc/ipmb.c b/bmc/ipmb.c
new file mode 100644 (file)
index 0000000..7d272fb
--- /dev/null
+++ b/bmc/ipmb.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+
+#include "ipmb.h"
+
+uint8_t ipmb_csum(unsigned char *buf, int len)
+{
+       uint8_t csum = 0x00;
+       int i;
+
+       for(i = 0; i < len; i++) {
+               csum += buf[i];
+       }
+
+       return -csum;
+}
+
+void decode_ipmb_pkt(unsigned char *buf, int len)
+{
+       int i;
+       struct ipmb_req req;
+
+       req.rsSA = buf[0];
+       req.netFn = (buf[1]>>2)&0x3f;
+       req.rsLUN = (buf[1] & 0x03);
+       req.rqSA = buf[3];
+       req.rqSEQ = (buf[4]>>2)&0x3f;
+       req.rqLUN = (buf[4] & 0x03);
+       req.cmd = buf[5];
+       req.data = buf+6;
+       req.datalen = len - 6 - 1;
+
+       printf(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n");
+       printf("Connection Header:\n");
+       printf("\trs Slave Addr.: 0x%02x\n", req.rsSA);
+       printf("\tnetFn: 0x%02x, LUN: 0x%02x\n", req.netFn, req.rsLUN);
+       printf("\tChecksum: 0x%02x (%s)\n", buf[2],
+               (buf[2] == ipmb_csum(buf, 2)) ? "OK" : "Wrong");
+       printf("Data:\n");
+       printf("\trq Slave Addr.: 0x%02x\n", req.rqSA);
+       printf("\trqSeq: 0x%02x, rqLUN: 0x%02x\n", req.rqSEQ, req.rqLUN);
+       printf("\tcmd: 0x%02x\n", req.cmd);
+       printf("\tData: ");
+       for(i = 0; i < req.datalen; i++) {
+               printf("0x%02x ", req.data[i]);
+       }
+       printf("\n");
+       printf("\tChecksum: 0x%02x (%s)\n", buf[len-1],
+               (buf[len-1] == ipmb_csum(buf+3, len-4)) ? "OK" : "Wrong");
+       printf("<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<\n");
+
+       if ((buf[2] != ipmb_csum(buf, 2)) ||
+           (buf[len-1] == ipmb_csum(buf+3, len-4)))
+               return; /* Checksum wrong */
+
+       //i2c_send((unsigned char*)"\x28\x00",1);
+}