openwrt-packages/cgminer/patches/0001-add-icarus.c-base-on-bitforce.c.patch

From 340b923e42d32bd5173fe6b285923635a6fcc67f Mon Sep 17 00:00:00 2001
From: Xiangfu <xiangfu@openmobilefree.net>
Date: Mon, 13 Feb 2012 16:04:34 +0800
Subject: [PATCH 1/7] add icarus.c, base on bitforce.c

---
 icarus.c |  307 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 307 insertions(+), 0 deletions(-)
 create mode 100644 icarus.c

diff --git a/icarus.c b/icarus.c
new file mode 100644
index 0000000..56b8d8a
--- /dev/null
+++ b/icarus.c
@@ -0,0 +1,307 @@
+/*
+ * Copyright 2012 Luke Dashjr
+ * Copyright 2012 Xiangfu <xiangfu@openmobilefree.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.  See COPYING for more details.
+ */
+
+/*
+ * Those code should be works fine with V2 and V3 bitstream of Icarus.
+ * Operation:
+ *   No detection implement.
+ *   Input: 64B = 32B midstate + 20B fill bytes + last 12 bytes of block head.
+ *   Return: send back 32bits immediately when Icarus found a valid nonce.
+ *           no query protocol implemented here, if no data send back in ~11.3
+ *           seconds (full cover time on 32bit nonce range by 380MH/s speed)
+ *           just send another work.
+ * Notice:
+ *   1. Icarus will start calculate when you push a work to them, even they
+ *      are busy.
+ *   2. The 2 FPGAs on Icarus will distribute the job, one will calculate the
+ *      0 ~ 7FFFFFFF, another one will cover the 80000000 ~ FFFFFFFF.
+ *   3. It's possible for 2 FPGAs both find valid nonce in the meantime, the 2
+ *      valid nonce will all be send back.
+ *   4. Icarus will stop work when: a valid nonce has been found or 32 bits
+ *      nonce range is completely calculated.
+ */
+
+#include <limits.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <unistd.h>
+#ifndef WIN32
+  #include <termios.h>
+  #include <sys/stat.h>
+  #include <fcntl.h>
+  #ifndef O_CLOEXEC
+    #define O_CLOEXEC 0
+  #endif
+#else
+  #include <windows.h>
+  #include <io.h>
+#endif
+
+#include "elist.h"
+#include "miner.h"
+
+#define ICARUS_READ_FAULT_COUNT	(8)
+
+int icarus_read_count;
+struct device_api icarus_api;
+
+static void rev(unsigned char *s, size_t l)
+{
+	size_t i, j;
+	unsigned char t;
+
+	for (i = 0, j = l - 1; i < j; i++, j--) {
+		t = s[i];
+		s[i] = s[j];
+		s[j] = t;
+	}
+}
+
+static int icarus_open(const char *devpath)
+{
+#ifndef WIN32
+	struct termios my_termios;
+
+	int serialfd = open(devpath, O_RDWR | O_CLOEXEC | O_NOCTTY);
+
+	if (serialfd == -1)
+		return -1;
+
+	tcgetattr(serialfd, &my_termios);
+	my_termios.c_cflag = B115200;
+	my_termios.c_cflag |= CS8;
+	my_termios.c_cflag |= CREAD;
+	my_termios.c_cflag |= CLOCAL;
+	my_termios.c_cflag &= ~(CSIZE | PARENB);
+
+	my_termios.c_iflag &= ~(IGNBRK | BRKINT | PARMRK |
+				ISTRIP | INLCR | IGNCR | ICRNL | IXON);
+	my_termios.c_oflag &= ~OPOST;
+	my_termios.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
+	my_termios.c_cc[VTIME] = 10; /* block 1 second */
+	my_termios.c_cc[VMIN] = 0;
+	tcsetattr(serialfd, TCSANOW, &my_termios);
+
+	tcflush(serialfd, TCOFLUSH);
+	tcflush(serialfd, TCIFLUSH);
+
+	return serialfd;
+#else
+	HANDLE hSerial = CreateFile(devpath, GENERIC_READ | GENERIC_WRITE, 0,
+				    NULL, OPEN_EXISTING, 0, NULL);
+	if (unlikely(hSerial == INVALID_HANDLE_VALUE))
+		return -1;
+	/* TODO: Needs setup read block time. just like VTIME = 10 */
+	return _open_osfhandle((LONG)hSerial, 0);
+#endif
+}
+
+static void icarus_gets(char *buf, size_t bufLen, int fd)
+{
+	ssize_t ret = 0;
+
+	icarus_read_count = 0;
+
+	while (bufLen) {
+		ret = read(fd, buf, 1);
+		if (ret == 1) {
+			bufLen--;
+			buf++;
+			continue;
+		}
+
+		icarus_read_count++;
+		if (icarus_read_count == ICARUS_READ_FAULT_COUNT) {
+			applog(LOG_WARNING,
+			       "Icarus Read: No data in %d seconds",
+			       ICARUS_READ_FAULT_COUNT);
+			break;
+		}
+	}
+}
+
+static void icarus_write(int fd, const void *buf, size_t bufLen)
+{
+	ssize_t ret;
+
+	ret = write(fd, buf, bufLen);
+	if (unlikely(ret != bufLen))
+		quit(1, "Icarus: Send data failed!");
+}
+
+#define icarus_close(fd) close(fd)
+
+static bool icarus_detect_one(const char *devpath)
+{
+	int fd;
+	static int i = 0;
+
+	const unsigned char golden_ob[] =
+		"2db907f9cb4eb938ded904f4832c4331"
+		"0380e3aeb54364057e7fec5157bfc533"
+		"00000000000000000000000080000000"
+		"00000000a58e091ac342724e7c3dc346";
+	const unsigned char golden_nonce[] = "063c5e01";
+
+	char ob_bin[64], nonce_bin[4];
+	char *nonce_hex;
+
+	if (total_devices == MAX_DEVICES)
+		return false;
+
+	fd = icarus_open(devpath);
+	if (unlikely(fd == -1)) {
+		applog(LOG_ERR, "Icarus Detect: Failed to open %s", devpath);
+		return false;
+	}
+
+	hex2bin(ob_bin, golden_ob, sizeof(ob_bin));
+	icarus_write(fd, ob_bin, sizeof(ob_bin));
+
+	memset(nonce_bin, 0, sizeof(nonce_bin));
+	icarus_gets(nonce_bin, sizeof(nonce_bin), fd);
+
+	icarus_close(fd);
+
+	nonce_hex = bin2hex(nonce_bin, sizeof(nonce_bin));
+	if (nonce_hex) {
+		if (strncmp(nonce_hex, golden_nonce, 8)) {
+			applog(LOG_ERR, 
+			       "Icarus Detect: "
+			       "Test failed at %s : get %s, should: %s",
+			       devpath, nonce_hex, golden_nonce);
+			free(nonce_hex);
+			return false;
+		}
+		free(nonce_hex);
+	} else
+		return false;
+
+	/* We have a real Icarus! */
+	struct cgpu_info *icarus;
+	icarus = calloc(1, sizeof(*icarus));
+	devices[total_devices++] = icarus;
+	icarus->api = &icarus_api;
+	icarus->device_id = i++;
+	icarus->device_path = strdup(devpath);
+	icarus->threads = 1;
+
+	return true;
+}
+
+static void icarus_detect()
+{
+	struct string_elist *iter, *tmp;
+
+	list_for_each_entry_safe(iter, tmp, &scan_devices, list) {
+		if (icarus_detect_one(iter->string))
+			string_elist_del(iter);
+	}
+}
+
+static bool icarus_thread_prepare(struct thr_info *thr)
+{
+	struct cgpu_info *icarus = thr->cgpu;
+
+	struct timeval now;
+
+	int fd = icarus_open(icarus->device_path);
+	if (unlikely(-1 == fd)) {
+		applog(LOG_ERR, "Failed to open Icarus on %s",
+		       icarus->device_path);
+		return false;
+	}
+
+	icarus->device_fd = fd;
+
+	applog(LOG_INFO, "Opened Icarus on %s", icarus->device_path);
+	gettimeofday(&now, NULL);
+	get_datestamp(icarus->init, &now);
+
+	return true;
+}
+
+static uint64_t icarus_scanhash(struct thr_info *thr, struct work *work,
+				uint64_t max_nonce)
+{
+	struct cgpu_info *icarus;
+	int fd;
+
+	unsigned char ob_bin[64], nonce_bin[4];
+	unsigned char *ob_hex, *nonce_hex;
+	uint32_t nonce;
+	uint32_t hash_count;
+	time_t t;
+
+	icarus = thr->cgpu;
+	fd = icarus->device_fd;
+
+	memset(ob_bin, 0, sizeof(ob_bin));
+	memcpy(ob_bin, work->midstate, 32);
+	memcpy(ob_bin + 52, work->data + 64, 12);
+	rev(ob_bin, 32);
+	rev(ob_bin + 52, 12);
+#ifndef WIN32
+	tcflush(fd, TCOFLUSH);
+#endif
+	icarus_write(fd, ob_bin, sizeof(ob_bin));
+
+	ob_hex = bin2hex(ob_bin, sizeof(ob_bin));
+	if (ob_hex) {
+		t = time(NULL);
+		applog(LOG_DEBUG, "Icarus send : %s", ob_hex);
+		free(ob_hex);
+	}
+
+	/* Icarus will return 8 bytes nonces or nothing */
+	memset(nonce_bin, 0, sizeof(nonce_bin));
+	icarus_gets(nonce_bin, sizeof(nonce_bin), fd);
+
+	nonce_hex = bin2hex(nonce_bin, sizeof(nonce_bin));
+	if (nonce_hex) {
+		t = time(NULL) - t;
+		applog(LOG_DEBUG, "Icarus return (elapse %d seconds): %s",
+		       t, nonce_hex);
+		free(nonce_hex);
+	}
+
+	memcpy((char *)&nonce, nonce_bin, sizeof(nonce_bin));
+
+        if (nonce == 0 && icarus_read_count == ICARUS_READ_FAULT_COUNT)
+                return 0xffffffff;
+
+#ifndef __BIG_ENDIAN__
+	nonce = swab32(nonce);
+#endif
+	work->blk.nonce = 0xffffffff;
+	submit_nonce(thr, work, nonce);
+
+	hash_count = (nonce & 0x7fffffff);
+        if (hash_count == 0)
+		hash_count = 2;
+        else {
+                if (hash_count++ == 0x7fffffff)
+                        hash_count = 0xffffffff;
+                else
+                        hash_count <<= 1;
+        }
+
+        return hash_count;
+}
+
+struct device_api icarus_api = {
+	.name = "Icarus",
+	.api_detect = icarus_detect,
+	.thread_prepare = icarus_thread_prepare,
+	.scanhash = icarus_scanhash,
+};
-- 
1.7.5.4