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.
---
 eim/sw/hash_eim.c | 55 ++++++++++---------------------------------------------
 1 file changed, 10 insertions(+), 45 deletions(-)

(limited to 'eim/sw/hash_eim.c')

diff --git a/eim/sw/hash_eim.c b/eim/sw/hash_eim.c
index 8ea761b..e698129 100644
--- a/eim/sw/hash_eim.c
+++ b/eim/sw/hash_eim.c
@@ -101,55 +101,25 @@ 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)
-{
-    return tc_wait(offset, STATUS_READY_BIT, NULL);
-}
-
-int tc_wait_valid(off_t offset)
-{
-    return tc_wait(offset, STATUS_VALID_BIT, NULL);
-}
-
 /* ---------------- hash ---------------- */
 
-int transmit(off_t offset, uint8_t *block, int blen, int mode, int first)
+static 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,
-                 uint8_t mode, long long tlen, int first)
+static int pad_transmit(off_t offset, uint8_t *block, uint8_t flen, uint8_t blen,
+			uint8_t mode, long long tlen, int first)
 {
     assert(flen < blen);
 
@@ -173,7 +143,7 @@ int pad_transmit(off_t offset, uint8_t *block, uint8_t flen, uint8_t blen,
 }
 
 /* return number of digest bytes read */
-int hash(char *algo, char *file, uint8_t *digest)
+static int hash(char *algo, char *file, uint8_t *digest)
 {
     uint8_t block[SHA512_BLOCK_LEN];
     struct ctrl *ctrl;
@@ -305,11 +275,6 @@ int main(int argc, char *argv[])
             printf("reading from stdin\n");
     }
 
-    if (eim_setup() != 0) {
-        fprintf(stderr, "EIM setup failed\n");
-        return EXIT_FAILURE;
-    }
-
     dlen = hash(algo, file, digest);
     if (dlen < 0)
         return EXIT_FAILURE;
-- 
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