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-rw-r--r--src/tc_i2c.c331
1 files changed, 0 insertions, 331 deletions
diff --git a/src/tc_i2c.c b/src/tc_i2c.c
deleted file mode 100644
index 613d1c6..0000000
--- a/src/tc_i2c.c
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * tc_i2c.c
- * --------
- * This module contains common code to talk to the FPGA over the I2C bus.
- *
- * Author: Paul Selkirk
- * Copyright (c) 2014-2015, NORDUnet A/S All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * - Neither the name of the NORDUnet nor the names of its contributors may
- * be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
- * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
- * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
- * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
- * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <sys/ioctl.h>
-#include <stdint.h>
-
-#include "tc_i2c.h"
-
-extern int debug;
-
-/* ---------------- I2C low-level code ---------------- */
-
-static int i2cfd = -1;
-
-static void dump(char *label, const uint8_t *buf, size_t len)
-{
- if (debug) {
- int i;
- printf("%s [", label);
- for (i = 0; i < len; ++i)
- printf(" %02x", buf[i]);
- printf(" ]\n");
- }
-}
-
-static void i2c_close(void)
-{
- close(i2cfd);
-}
-
-static int i2c_open(void)
-{
- if (i2cfd >= 0)
- return 0;
-
- i2cfd = open(I2C_dev, O_RDWR);
- if (i2cfd < 0) {
- fprintf(stderr, "Unable to open %s: ", I2C_dev);
- perror("");
- i2cfd = 0;
- return 1;
- }
-
- if (ioctl(i2cfd, I2C_SLAVE, I2C_addr) < 0) {
- fprintf(stderr, "Unable to set I2C slave device 0x%02x: ", I2C_addr);
- perror("");
- return 1;
- }
-
- if (atexit(i2c_close) != 0) {
- fprintf(stderr, "Unable to set I2C atexit handler.");
- return 1;
- }
-
- return 0;
-}
-
-static int i2c_write(const uint8_t *buf, size_t len)
-{
- if (i2c_open() != 0)
- return 1;
-
- dump("write ", buf, len);
-
- if (write(i2cfd, buf, len) != len) {
- perror("i2c write failed");
- return 1;
- }
-
- return 0;
-}
-
-static int i2c_read(uint8_t *b)
-{
- if (i2c_open() != 0)
- return 1;
-
- /* read() on the i2c device only returns one byte at a time,
- * and tc_get_resp() needs to parse the response one byte at a time
- */
- if (read(i2cfd, b, 1) != 1) {
- perror("i2c read failed");
- return 1;
- }
-
- return 0;
-}
-
-/* ---------------- test-case low-level code ---------------- */
-
-/* coretest command codes */
-#define SOC 0x55
-#define EOC 0xaa
-#define READ_CMD 0x10
-#define WRITE_CMD 0x11
-#define RESET_CMD 0x01
-
-/* coretest response codes */
-#define SOR 0xaa
-#define EOR 0x55
-#define READ_OK 0x7f
-#define WRITE_OK 0x7e
-#define RESET_OK 0x7d
-#define UNKNOWN 0xfe
-#define ERROR 0xfd
-
-static int tc_send_write_cmd(off_t offset, const uint8_t *data)
-{
- uint8_t buf[9] = { SOC, WRITE_CMD, (offset >> 8) & 0xff, offset & 0xff,
- data[0], data[1], data[2], data[3], EOC };
-
- return i2c_write(buf, sizeof(buf));
-}
-
-static int tc_send_read_cmd(off_t offset)
-{
- uint8_t buf[5] = { SOC, READ_CMD, (offset >> 8) & 0xff, offset & 0xff, EOC };
-
- return i2c_write(buf, sizeof(buf));
-}
-
-static int tc_get_resp(uint8_t *buf, size_t len)
-{
- int i;
-
- for (i = 0; i < len; ++i) {
- if (i2c_read(&buf[i]) != 0)
- return 1;
- if ((i == 0) && (buf[i] != SOR)) {
- /* we've gotten out of sync, and there's probably nothing we can do */
- fprintf(stderr, "response byte 0: expected 0x%02x (SOR), got 0x%02x\n",
- SOR, buf[0]);
- return 1;
- }
- else if (i == 1) { /* response code */
- switch (buf[i]) {
- case READ_OK:
- len = 9;
- break;
- case WRITE_OK:
- len = 5;
- break;
- case RESET_OK:
- len = 3;
- break;
- case ERROR:
- case UNKNOWN:
- len = 4;
- break;
- default:
- /* we've gotten out of sync, and there's probably nothing we can do */
- fprintf(stderr, "unknown response code 0x%02x\n", buf[i]);
- return 1;
- }
- }
- }
-
- dump("read ", buf, len);
-
- return 0;
-}
-
-static int tc_compare(uint8_t *buf, const uint8_t *expected, size_t len)
-{
- int i;
-
- /* start at byte 1 because SOR has already been tested */
- for (i = 1; i < len; ++i) {
- if (buf[i] != expected[i]) {
- fprintf(stderr, "response byte %d: expected 0x%02x, got 0x%02x\n",
- i, expected[i], buf[i]);
- return 1;
- }
- }
-
- return 0;
-}
-
-static int tc_get_write_resp(off_t offset)
-{
- uint8_t buf[5];
- uint8_t expected[5] = { SOR, WRITE_OK, (offset >> 8) & 0xff, offset & 0xff, EOR };
-
- return
- tc_get_resp(buf, sizeof(buf)) ||
- tc_compare(buf, expected, sizeof(expected));
-}
-
-static int tc_get_read_resp(off_t offset, uint8_t *data)
-{
- uint8_t buf[9];
- uint8_t expected[4] = { SOR, READ_OK, (offset >> 8) & 0xff, offset & 0xff };
-
- if ((tc_get_resp(buf, sizeof(buf)) != 0) ||
- (tc_compare(buf, expected, 4) != 0) || buf[8] != EOR)
- return 1;
-
- data[0] = buf[4];
- data[1] = buf[5];
- data[2] = buf[6];
- data[3] = buf[7];
-
- return 0;
-}
-
-static int tc_get_read_resp_expected(off_t offset, const uint8_t *data)
-{
- uint8_t buf[9];
- uint8_t expected[9] = { SOR, READ_OK, (offset >> 8) & 0xff, offset & 0xff,
- data[0], data[1], data[2], data[3], EOR };
-
- dump("expect", expected, 9);
-
- return (tc_get_resp(buf, sizeof(buf)) ||
- tc_compare(buf, expected, sizeof(buf)));
-}
-
-int tc_write(off_t offset, const uint8_t *buf, size_t len)
-{
- for (; len > 0; offset++, buf += 4, len -= 4) {
- if (tc_send_write_cmd(offset, buf) ||
- tc_get_write_resp(offset))
- return 1;
- }
-
- return 0;
-}
-
-int tc_read(off_t offset, uint8_t *buf, size_t len)
-{
- for (; len > 0; offset++, buf += 4, len -= 4) {
- if (tc_send_read_cmd(offset) ||
- tc_get_read_resp(offset, buf))
- return 1;
- }
-
- return 0;
-}
-
-int tc_expected(off_t offset, const uint8_t *buf, size_t len)
-{
- for (; len > 0; offset++, buf += 4, len -= 4) {
- if (tc_send_read_cmd(offset) ||
- tc_get_read_resp_expected(offset, buf))
- return 1;
- }
-
- return 0;
-}
-
-int tc_init(off_t offset)
-{
- uint8_t buf[4] = { 0, 0, 0, CTRL_INIT_CMD };
-
- return tc_write(offset, buf, 4);
-}
-
-int tc_next(off_t offset)
-{
- uint8_t buf[4] = { 0, 0, 0, CTRL_NEXT_CMD };
-
- return tc_write(offset, buf, 4);
-}
-
-int tc_wait(off_t offset, uint8_t status, int *count)
-{
- uint8_t buf[4];
- int i;
-
- for (i = 1; ; ++i) {
- if (count && (*count > 0) && (i >= *count)) {
- fprintf(stderr, "tc_wait timed out\n");
- return 1;
- }
- if (tc_read(offset, buf, 4) != 0)
- return -1;
- if (buf[3] & status) {
- if (count)
- *count = i;
- return 0;
- }
- }
-}
-
-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);
-}
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