From aeaf94f4e83826fe56f38fc670973a60a5010ef1 Mon Sep 17 00:00:00 2001
From: Paul Selkirk <paul@psgd.org>
Date: Wed, 8 Apr 2015 16:01:31 -0400
Subject: Unify and refactor eim and i2c software.

Unify memory maps.
Move tc_init, tc_next, tc_wait_* into tc_[eim|i2c].c.
Move eim_setup into tc_eim.c, move i2c_open into tc_i2c.c.
---
 i2c/sw/hash_i2c.c | 63 +++++++------------------------------------------------
 1 file changed, 8 insertions(+), 55 deletions(-)

(limited to 'i2c/sw/hash_i2c.c')

diff --git a/i2c/sw/hash_i2c.c b/i2c/sw/hash_i2c.c
index 04006d3..3a9f0cf 100644
--- a/i2c/sw/hash_i2c.c
+++ b/i2c/sw/hash_i2c.c
@@ -49,7 +49,7 @@
 #include "cryptech_memory_map.h"
 
 char *usage =
-"Usage: %s [-d] [-v] [-q] [-i I2C_device] [-a I2C_addr] [algorithm [file]]\n"
+"Usage: %s [-d] [-v] [-q] [algorithm [file]]\n"
 "algorithms: sha-1, sha-256, sha-512/224, sha-512/256, sha-384, sha-512\n";
 
 int debug = 0;
@@ -96,53 +96,21 @@ struct ctrl *find_algo(char *algo)
     return NULL;
 }
 
-/* ---------------- test-case low-level code ---------------- */
-
-int tc_init(off_t offset, int mode)
-{
-    uint8_t buf[4] = { 0, 0, 0, CTRL_INIT_CMD + mode };
-
-    return tc_write(offset, buf, 4);
-}
-
-int tc_next(off_t offset, int mode)
-{
-    uint8_t buf[4] = { 0, 0, 0, CTRL_NEXT_CMD + mode };
-
-    return tc_write(offset, buf, 4);
-}
-
-int tc_wait_ready(off_t offset)
-{
-    int limit = 10;
-    return tc_wait(offset, STATUS_READY_BIT, &limit);
-}
-
-int tc_wait_valid(off_t offset)
-{
-    int limit = 10;
-    return tc_wait(offset, STATUS_VALID_BIT, &limit);
-}
-
 /* ---------------- hash ---------------- */
 
 int transmit(off_t offset, uint8_t *block, int blen, int mode, int first)
 {
-    off_t base = offset & ~(0xff);
+    off_t base = offset & ~(0x1ff);
+    uint8_t ctrl_cmd[4] = { 0 };
 
     if (tc_write(offset, block, blen) != 0)
         return 1;
 
-    if (first) {
-        if (tc_init(base + ADDR_CTRL, mode) != 0)
-            return 1;
-    }
-    else {
-        if (tc_next(base + ADDR_CTRL, mode) != 0)
-            return 1;
-    }
+    ctrl_cmd[3] = (first ? CTRL_INIT_CMD : CTRL_NEXT_CMD) | mode;
 
-    return tc_wait_ready(base + ADDR_STATUS);
+    return
+	tc_write(base + ADDR_CTRL, ctrl_cmd, 4) ||
+	tc_wait_ready(base + ADDR_STATUS);
 }
 
 int pad_transmit(off_t offset, uint8_t *block, uint8_t flen, uint8_t blen,
@@ -257,15 +225,13 @@ out:
 
 int main(int argc, char *argv[])
 {
-    char *dev = I2C_dev;
-    int addr = I2C_addr;
     int i, opt;
     char *algo = "sha-1";
     char *file = "-";
     uint8_t digest[512/8];
     int dlen;
 
-    while ((opt = getopt(argc, argv, "h?dvqi:a:")) != -1) {
+    while ((opt = getopt(argc, argv, "h?dvq")) != -1) {
         switch (opt) {
         case 'h':
         case '?':
@@ -280,16 +246,6 @@ int main(int argc, char *argv[])
         case 'q':
             quiet = 1;
             break;
-        case 'i':
-            dev = optarg;
-            break;
-        case 'a':
-            addr = (int)strtol(optarg, NULL, 0);
-            if ((addr < 0x03) || (addr > 0x77)) {
-                fprintf(stderr, "addr must be between 0x03 and 0x77\n");
-                return EXIT_FAILURE;
-            }
-            break;
         default:
             fprintf(stderr, usage, argv[0]);
             return EXIT_FAILURE;
@@ -314,9 +270,6 @@ int main(int argc, char *argv[])
             printf("reading from stdin\n");
     }
 
-    if (i2c_open(dev, addr) != 0)
-        return EXIT_FAILURE;
-
     dlen = hash(algo, file, digest);
     if (dlen < 0)
         return EXIT_FAILURE;
-- 
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