Initial CRC and SATA scrambling commit

diff --git a/src/jm_crc.c b/src/jm_crc.c
new file mode 100644 (file)
index 0000000..6a79b56
--- /dev/null
+++ b/src/jm_crc.c
@@ -0,0 +1,76 @@
+/*
+ * Implement CRC calculation as the JMB394 RAID controller expects it
+ * Copyright (C) 2010 Werner Johansson, <wj@xnk.nu>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "jm_crc.h"
+#include <arpa/inet.h> // For htonl etc.
+
+// Standard CRC-32 LUT for polynomial 0x04c11db7
+const uint32_t crcLUT[256] = { \
+    0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005, \
+    0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, \
+    0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, \
+    0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd, \
+    0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, \
+    0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, \
+    0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95, \
+    0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, \
+    0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072, \
+    0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, \
+    0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, \
+    0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, \
+    0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, \
+    0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, \
+    0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, \
+    0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a, \
+    0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, \
+    0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, \
+    0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b, \
+    0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, \
+    0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, \
+    0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3, \
+    0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, \
+    0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3, \
+    0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, \
+    0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, \
+    0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec, \
+    0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, \
+    0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, \
+    0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, \
+    0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, \
+    0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 };
+
+uint32_t JM_CRC( uint32_t* theData, uint32_t numDwords ) {
+    // Unusual initial remainder?
+    uint32_t crcRem = 0x52325032;
+
+    uint32_t i;
+
+    // One 32-bit word at a time CRC:d in NETWORK order without any reflection
+    for( i = 0; i < numDwords; i++) {
+        uint32_t dw = ntohl( theData[i] );
+        crcRem = crcLUT[ (dw&0xff)      ^ (crcRem >> 24) ] ^ (crcRem << 8);
+        crcRem = crcLUT[ ((dw>>8)&0xff) ^ (crcRem >> 24) ] ^ (crcRem << 8);
+        crcRem = crcLUT[ ((dw>>16)&0xff)^ (crcRem >> 24) ] ^ (crcRem << 8);
+        crcRem = crcLUT[ (dw>>24)       ^ (crcRem >> 24) ] ^ (crcRem << 8);
+    }
+
+    // No reflection or final xor of the result
+    return crcRem;
+}
+

diff --git a/src/jm_crc.h b/src/jm_crc.h
new file mode 100644 (file)
index 0000000..256c4e1
--- /dev/null
+++ b/src/jm_crc.h
@@ -0,0 +1,9 @@
+#ifndef JM_CRC_H
+#define JM_CRC_H
+
+#include <stdint.h>
+
+uint32_t JM_CRC(uint32_t* theData, uint32_t numDwords);
+
+#endif
+

diff --git a/src/sata_xor.c b/src/sata_xor.c
new file mode 100644 (file)
index 0000000..87fa3eb
--- /dev/null
+++ b/src/sata_xor.c
@@ -0,0 +1,47 @@
+/*
+ * Simple table-based SATA (de)scrambler
+ * Copyright (C) 2010 Werner Johansson, <wj@xnk.nu>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#include "sata_xor.h"
+
+const uint32_t SATA_XOR_scramblerdata[512/4] = { \
+    0x4467c108, 0x3d0d9104, 0x61db449c, 0x5c0063ba, 0x19c47848, 0x1f8ac89f, 0x837fa38f, 0x717acf08, \
+    0xcd1da489, 0xe132d2e7, 0xfad4ad27, 0xeb99030e, 0x505083f7, 0xbe792d11, 0xe3f1b43c, 0x9f3bd98f, \
+    0x67f3b0d9, 0x5de09087, 0x60f0f9ff, 0x2e1a5561, 0x73af5281, 0xc7ad25ee, 0x6bce6e01, 0x74498d01, \
+    0x7eed9e9c, 0xa2f33be9, 0x39a0458e, 0x6b96cd0f, 0xb4a73c90, 0xba726f5a, 0x1f586b08, 0xc62a4235, \
+    0xa251f44f, 0x896e48a1, 0xc86d36e9, 0x3aec123b, 0x372f89ad, 0x63de1aab, 0xee74ef2f, 0xd151a9c7, \
+    0x92ad63ae, 0xf198781b, 0xfabb40b6, 0x22f30722, 0xa346b795, 0x85162bca, 0xc50a4140, 0xadc761f3, \
+    0x651bfb53, 0xee55c9ac, 0xa002c173, 0x1553fe29, 0x8dad1f8f, 0xef15de77, 0xd81bf36b, 0xaae39644, \
+    0x10dc2a5a, 0x3cda967b, 0x383df28b, 0x2cf381a4, 0x54f54158, 0x739d4573, 0x2ae8fdc5, 0x5030c6be, \
+    0xa08f4f9e, 0xe94aed29, 0xca03322f, 0x7a5bd813, 0xe6589dae, 0x90227388, 0x416c430a, 0x1ac4175b, \
+    0xeff95e27, 0x23579f63, 0x7097276c, 0x7b5ba8f5, 0x370fa95d, 0xb28bffae, 0x28d9cac8, 0x46b25b8e, \
+    0x384080be, 0x2cbbeee4, 0x72c182d2, 0x4b4f115a, 0xf1b9e254, 0x3d539624, 0x50f18133, 0x71041a2e, \
+    0x66bff980, 0x226f9c69, 0xbb69d044, 0x988493ad, 0x3267af74, 0xf3658fb9, 0x85f40f4b, 0xffbab5ef, \
+    0x9e9edae1, 0x19a99632, 0xf7434fb8, 0x0f1c4cf6, 0xb667d2ce, 0x278de3e3, 0x4c98271e, 0xff5c3773, \
+    0x64ca16ab, 0x6dc0917d, 0x1af060ae, 0xf4e61243, 0xc2bae8d6, 0xcee62f9b, 0x8d6a0807, 0x31a76228, \
+    0x9b4b3de9, 0x1318195b, 0x08c1a9d2, 0x8c1262ce, 0x43e36412, 0x1c59e3bb, 0xb9cd7f57, 0xab476572, \
+    0xc161feb8, 0x25ecc208, 0x891cb98e, 0xa7d26ddf, 0x5210a736, 0xaa2d212a, 0x77d13198, 0x403ba835 };
+
+void SATA_XOR( uint32_t* theData ) {
+    uint32_t i;
+
+    for( i=0; i<(512/4); i++ ) {
+        theData[i] ^= SATA_XOR_scramblerdata[i];
+    }
+}
+

diff --git a/src/sata_xor.h b/src/sata_xor.h
new file mode 100644 (file)
index 0000000..c3a8cd1
--- /dev/null
+++ b/src/sata_xor.h
@@ -0,0 +1,9 @@
+#ifndef SATA_XOR_H
+#define SATA_XOR_H
+
+#include <stdint.h>
+
+void SATA_XOR( uint32_t* theData );
+
+#endif
+