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From 933e887fe2d9a0924a8e05efa6bc3b530b40976d Mon Sep 17 00:00:00 2001
From: Sergey Solomin <sergey.solomin@us.ibm.com>
Date: Tue, 6 Sep 2016 15:36:43 -0500
Subject: [PATCH 1/1] 4 byte read support 466
---
tools/i2cdump.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/tools/i2cdump.c b/tools/i2cdump.c
index a7bba72..99c79be 100644
--- a/tools/i2cdump.c
+++ b/tools/i2cdump.c
@@ -25,6 +25,7 @@
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
+#include <stdint.h>
#include <unistd.h>
#include <linux/i2c.h>
#include <linux/i2c-dev.h>
@@ -33,6 +34,8 @@
#include "util.h"
#include "../version.h"
+#define I2C_SMBUS_DWORD 7
+
static void help(void)
{
fprintf(stderr,
@@ -46,6 +49,7 @@ static void help(void)
" s (SMBus block)\n"
" i (I2C block)\n"
" c (consecutive byte)\n"
+ " d (double word)\n"
" Append p for SMBus PEC\n");
}
@@ -184,6 +188,9 @@ int main(int argc, char *argv[])
} else if (!strncmp(argv[flags+3], "c", 1)) {
size = I2C_SMBUS_BYTE;
pec = argv[flags+3][1] == 'p';
+ } else if (!strncmp(argv[flags+3], "d", 1)) {
+ size = I2C_SMBUS_DWORD;
+ pec = argv[flags+3][1] == 'p';
} else if (!strcmp(argv[flags+3], "i"))
size = I2C_SMBUS_I2C_BLOCK_DATA;
else {
@@ -285,6 +292,7 @@ int main(int argc, char *argv[])
size == I2C_SMBUS_BLOCK_DATA ? "smbus block" :
size == I2C_SMBUS_I2C_BLOCK_DATA ? "i2c block" :
size == I2C_SMBUS_BYTE ? "byte consecutive read" :
+ size == I2C_SMBUS_DWORD ? "double word" :
size == I2C_SMBUS_BYTE_DATA ? "byte" : "word");
if (pec)
fprintf(stderr, "PEC checking enabled.\n");
@@ -313,6 +321,32 @@ int main(int argc, char *argv[])
}
}
+ /* handle mode 'd' (double word read) */
+ if (size == I2C_SMBUS_DWORD) {
+ unsigned char buff[sizeof(uint32_t)];
+ struct i2c_rdwr_ioctl_data msgset;
+ struct i2c_msg msg[1];
+
+ msg[0].addr = address;
+ msg[0].flags = I2C_M_RD;
+ msg[0].len = sizeof(buff);
+ msg[0].buf = buff;
+
+ msgset.msgs = msg;
+ msgset.nmsgs = 1;
+
+ if (ioctl( file, I2C_RDWR, &msgset ) < 0) {
+ fprintf(stderr, "Error: Could not read "
+ "double word. %s\n", strerror(errno));
+ exit(1);
+ }
+ for (uint8_t n = 0; n < sizeof(buff); n++) {
+ printf ("%02x ", buff[n]);
+ }
+ printf ("\n");
+ exit(0);
+ }
+
/* See Winbond w83781d data sheet for bank details */
if (bank && size != I2C_SMBUS_BLOCK_DATA) {
res = i2c_smbus_read_byte_data(file, bankreg);
--
1.8.2.2
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