+ * CRC of the string "123456789" is 0x21cf02
+ */
+
+static const u32 crc24_table[1024] =
+{
+ 0x00000000, 0x00fb4c86, 0x000dd58a, 0x00f6990c,
+ 0x00e1e693, 0x001aaa15, 0x00ec3319, 0x00177f9f,
+ 0x003981a1, 0x00c2cd27, 0x0034542b, 0x00cf18ad,
+ 0x00d86732, 0x00232bb4, 0x00d5b2b8, 0x002efe3e,
+ 0x00894ec5, 0x00720243, 0x00849b4f, 0x007fd7c9,
+ 0x0068a856, 0x0093e4d0, 0x00657ddc, 0x009e315a,
+ 0x00b0cf64, 0x004b83e2, 0x00bd1aee, 0x00465668,
+ 0x005129f7, 0x00aa6571, 0x005cfc7d, 0x00a7b0fb,
+ 0x00e9d10c, 0x00129d8a, 0x00e40486, 0x001f4800,
+ 0x0008379f, 0x00f37b19, 0x0005e215, 0x00feae93,
+ 0x00d050ad, 0x002b1c2b, 0x00dd8527, 0x0026c9a1,
+ 0x0031b63e, 0x00cafab8, 0x003c63b4, 0x00c72f32,
+ 0x00609fc9, 0x009bd34f, 0x006d4a43, 0x009606c5,
+ 0x0081795a, 0x007a35dc, 0x008cacd0, 0x0077e056,
+ 0x00591e68, 0x00a252ee, 0x0054cbe2, 0x00af8764,
+ 0x00b8f8fb, 0x0043b47d, 0x00b52d71, 0x004e61f7,
+ 0x00d2a319, 0x0029ef9f, 0x00df7693, 0x00243a15,
+ 0x0033458a, 0x00c8090c, 0x003e9000, 0x00c5dc86,
+ 0x00eb22b8, 0x00106e3e, 0x00e6f732, 0x001dbbb4,
+ 0x000ac42b, 0x00f188ad, 0x000711a1, 0x00fc5d27,
+ 0x005beddc, 0x00a0a15a, 0x00563856, 0x00ad74d0,
+ 0x00ba0b4f, 0x004147c9, 0x00b7dec5, 0x004c9243,
+ 0x00626c7d, 0x009920fb, 0x006fb9f7, 0x0094f571,
+ 0x00838aee, 0x0078c668, 0x008e5f64, 0x007513e2,
+ 0x003b7215, 0x00c03e93, 0x0036a79f, 0x00cdeb19,
+ 0x00da9486, 0x0021d800, 0x00d7410c, 0x002c0d8a,
+ 0x0002f3b4, 0x00f9bf32, 0x000f263e, 0x00f46ab8,
+ 0x00e31527, 0x001859a1, 0x00eec0ad, 0x00158c2b,
+ 0x00b23cd0, 0x00497056, 0x00bfe95a, 0x0044a5dc,
+ 0x0053da43, 0x00a896c5, 0x005e0fc9, 0x00a5434f,
+ 0x008bbd71, 0x0070f1f7, 0x008668fb, 0x007d247d,
+ 0x006a5be2, 0x00911764, 0x00678e68, 0x009cc2ee,
+ 0x00a44733, 0x005f0bb5, 0x00a992b9, 0x0052de3f,
+ 0x0045a1a0, 0x00beed26, 0x0048742a, 0x00b338ac,
+ 0x009dc692, 0x00668a14, 0x00901318, 0x006b5f9e,
+ 0x007c2001, 0x00876c87, 0x0071f58b, 0x008ab90d,
+ 0x002d09f6, 0x00d64570, 0x0020dc7c, 0x00db90fa,
+ 0x00ccef65, 0x0037a3e3, 0x00c13aef, 0x003a7669,
+ 0x00148857, 0x00efc4d1, 0x00195ddd, 0x00e2115b,
+ 0x00f56ec4, 0x000e2242, 0x00f8bb4e, 0x0003f7c8,
+ 0x004d963f, 0x00b6dab9, 0x004043b5, 0x00bb0f33,
+ 0x00ac70ac, 0x00573c2a, 0x00a1a526, 0x005ae9a0,
+ 0x0074179e, 0x008f5b18, 0x0079c214, 0x00828e92,
+ 0x0095f10d, 0x006ebd8b, 0x00982487, 0x00636801,
+ 0x00c4d8fa, 0x003f947c, 0x00c90d70, 0x003241f6,
+ 0x00253e69, 0x00de72ef, 0x0028ebe3, 0x00d3a765,
+ 0x00fd595b, 0x000615dd, 0x00f08cd1, 0x000bc057,
+ 0x001cbfc8, 0x00e7f34e, 0x00116a42, 0x00ea26c4,
+ 0x0076e42a, 0x008da8ac, 0x007b31a0, 0x00807d26,
+ 0x009702b9, 0x006c4e3f, 0x009ad733, 0x00619bb5,
+ 0x004f658b, 0x00b4290d, 0x0042b001, 0x00b9fc87,
+ 0x00ae8318, 0x0055cf9e, 0x00a35692, 0x00581a14,
+ 0x00ffaaef, 0x0004e669, 0x00f27f65, 0x000933e3,
+ 0x001e4c7c, 0x00e500fa, 0x001399f6, 0x00e8d570,
+ 0x00c62b4e, 0x003d67c8, 0x00cbfec4, 0x0030b242,
+ 0x0027cddd, 0x00dc815b, 0x002a1857, 0x00d154d1,
+ 0x009f3526, 0x006479a0, 0x0092e0ac, 0x0069ac2a,
+ 0x007ed3b5, 0x00859f33, 0x0073063f, 0x00884ab9,
+ 0x00a6b487, 0x005df801, 0x00ab610d, 0x00502d8b,
+ 0x00475214, 0x00bc1e92, 0x004a879e, 0x00b1cb18,
+ 0x00167be3, 0x00ed3765, 0x001bae69, 0x00e0e2ef,
+ 0x00f79d70, 0x000cd1f6, 0x00fa48fa, 0x0001047c,
+ 0x002ffa42, 0x00d4b6c4, 0x00222fc8, 0x00d9634e,
+ 0x00ce1cd1, 0x00355057, 0x00c3c95b, 0x003885dd,
+ 0x00000000, 0x00488f66, 0x00901ecd, 0x00d891ab,
+ 0x00db711c, 0x0093fe7a, 0x004b6fd1, 0x0003e0b7,
+ 0x00b6e338, 0x00fe6c5e, 0x0026fdf5, 0x006e7293,
+ 0x006d9224, 0x00251d42, 0x00fd8ce9, 0x00b5038f,
+ 0x006cc771, 0x00244817, 0x00fcd9bc, 0x00b456da,
+ 0x00b7b66d, 0x00ff390b, 0x0027a8a0, 0x006f27c6,
+ 0x00da2449, 0x0092ab2f, 0x004a3a84, 0x0002b5e2,
+ 0x00015555, 0x0049da33, 0x00914b98, 0x00d9c4fe,
+ 0x00d88ee3, 0x00900185, 0x0048902e, 0x00001f48,
+ 0x0003ffff, 0x004b7099, 0x0093e132, 0x00db6e54,
+ 0x006e6ddb, 0x0026e2bd, 0x00fe7316, 0x00b6fc70,
+ 0x00b51cc7, 0x00fd93a1, 0x0025020a, 0x006d8d6c,
+ 0x00b44992, 0x00fcc6f4, 0x0024575f, 0x006cd839,
+ 0x006f388e, 0x0027b7e8, 0x00ff2643, 0x00b7a925,
+ 0x0002aaaa, 0x004a25cc, 0x0092b467, 0x00da3b01,
+ 0x00d9dbb6, 0x009154d0, 0x0049c57b, 0x00014a1d,
+ 0x004b5141, 0x0003de27, 0x00db4f8c, 0x0093c0ea,
+ 0x0090205d, 0x00d8af3b, 0x00003e90, 0x0048b1f6,
+ 0x00fdb279, 0x00b53d1f, 0x006dacb4, 0x002523d2,
+ 0x0026c365, 0x006e4c03, 0x00b6dda8, 0x00fe52ce,
+ 0x00279630, 0x006f1956, 0x00b788fd, 0x00ff079b,
+ 0x00fce72c, 0x00b4684a, 0x006cf9e1, 0x00247687,
+ 0x00917508, 0x00d9fa6e, 0x00016bc5, 0x0049e4a3,
+ 0x004a0414, 0x00028b72, 0x00da1ad9, 0x009295bf,
+ 0x0093dfa2, 0x00db50c4, 0x0003c16f, 0x004b4e09,
+ 0x0048aebe, 0x000021d8, 0x00d8b073, 0x00903f15,
+ 0x00253c9a, 0x006db3fc, 0x00b52257, 0x00fdad31,
+ 0x00fe4d86, 0x00b6c2e0, 0x006e534b, 0x0026dc2d,
+ 0x00ff18d3, 0x00b797b5, 0x006f061e, 0x00278978,
+ 0x002469cf, 0x006ce6a9, 0x00b47702, 0x00fcf864,
+ 0x0049fbeb, 0x0001748d, 0x00d9e526, 0x00916a40,
+ 0x00928af7, 0x00da0591, 0x0002943a, 0x004a1b5c,
+ 0x0096a282, 0x00de2de4, 0x0006bc4f, 0x004e3329,
+ 0x004dd39e, 0x00055cf8, 0x00ddcd53, 0x00954235,
+ 0x002041ba, 0x0068cedc, 0x00b05f77, 0x00f8d011,
+ 0x00fb30a6, 0x00b3bfc0, 0x006b2e6b, 0x0023a10d,
+ 0x00fa65f3, 0x00b2ea95, 0x006a7b3e, 0x0022f458,
+ 0x002114ef, 0x00699b89, 0x00b10a22, 0x00f98544,
+ 0x004c86cb, 0x000409ad, 0x00dc9806, 0x00941760,
+ 0x0097f7d7, 0x00df78b1, 0x0007e91a, 0x004f667c,
+ 0x004e2c61, 0x0006a307, 0x00de32ac, 0x0096bdca,
+ 0x00955d7d, 0x00ddd21b, 0x000543b0, 0x004dccd6,
+ 0x00f8cf59, 0x00b0403f, 0x0068d194, 0x00205ef2,
+ 0x0023be45, 0x006b3123, 0x00b3a088, 0x00fb2fee,
+ 0x0022eb10, 0x006a6476, 0x00b2f5dd, 0x00fa7abb,
+ 0x00f99a0c, 0x00b1156a, 0x006984c1, 0x00210ba7,
+ 0x00940828, 0x00dc874e, 0x000416e5, 0x004c9983,
+ 0x004f7934, 0x0007f652, 0x00df67f9, 0x0097e89f,
+ 0x00ddf3c3, 0x00957ca5, 0x004ded0e, 0x00056268,
+ 0x000682df, 0x004e0db9, 0x00969c12, 0x00de1374,
+ 0x006b10fb, 0x00239f9d, 0x00fb0e36, 0x00b38150,
+ 0x00b061e7, 0x00f8ee81, 0x00207f2a, 0x0068f04c,
+ 0x00b134b2, 0x00f9bbd4, 0x00212a7f, 0x0069a519,
+ 0x006a45ae, 0x0022cac8, 0x00fa5b63, 0x00b2d405,
+ 0x0007d78a, 0x004f58ec, 0x0097c947, 0x00df4621,
+ 0x00dca696, 0x009429f0, 0x004cb85b, 0x0004373d,
+ 0x00057d20, 0x004df246, 0x009563ed, 0x00ddec8b,
+ 0x00de0c3c, 0x0096835a, 0x004e12f1, 0x00069d97,
+ 0x00b39e18, 0x00fb117e, 0x002380d5, 0x006b0fb3,
+ 0x0068ef04, 0x00206062, 0x00f8f1c9, 0x00b07eaf,
+ 0x0069ba51, 0x00213537, 0x00f9a49c, 0x00b12bfa,
+ 0x00b2cb4d, 0x00fa442b, 0x0022d580, 0x006a5ae6,
+ 0x00df5969, 0x0097d60f, 0x004f47a4, 0x0007c8c2,
+ 0x00042875, 0x004ca713, 0x009436b8, 0x00dcb9de,
+ 0x00000000, 0x00d70983, 0x00555f80, 0x00825603,
+ 0x0051f286, 0x0086fb05, 0x0004ad06, 0x00d3a485,
+ 0x0059a88b, 0x008ea108, 0x000cf70b, 0x00dbfe88,
+ 0x00085a0d, 0x00df538e, 0x005d058d, 0x008a0c0e,
+ 0x00491c91, 0x009e1512, 0x001c4311, 0x00cb4a92,
+ 0x0018ee17, 0x00cfe794, 0x004db197, 0x009ab814,
+ 0x0010b41a, 0x00c7bd99, 0x0045eb9a, 0x0092e219,
+ 0x0041469c, 0x00964f1f, 0x0014191c, 0x00c3109f,
+ 0x006974a4, 0x00be7d27, 0x003c2b24, 0x00eb22a7,
+ 0x00388622, 0x00ef8fa1, 0x006dd9a2, 0x00bad021,
+ 0x0030dc2f, 0x00e7d5ac, 0x006583af, 0x00b28a2c,
+ 0x00612ea9, 0x00b6272a, 0x00347129, 0x00e378aa,
+ 0x00206835, 0x00f761b6, 0x007537b5, 0x00a23e36,
+ 0x00719ab3, 0x00a69330, 0x0024c533, 0x00f3ccb0,
+ 0x0079c0be, 0x00aec93d, 0x002c9f3e, 0x00fb96bd,
+ 0x00283238, 0x00ff3bbb, 0x007d6db8, 0x00aa643b,
+ 0x0029a4ce, 0x00fead4d, 0x007cfb4e, 0x00abf2cd,
+ 0x00785648, 0x00af5fcb, 0x002d09c8, 0x00fa004b,
+ 0x00700c45, 0x00a705c6, 0x002553c5, 0x00f25a46,
+ 0x0021fec3, 0x00f6f740, 0x0074a143, 0x00a3a8c0,
+ 0x0060b85f, 0x00b7b1dc, 0x0035e7df, 0x00e2ee5c,
+ 0x00314ad9, 0x00e6435a, 0x00641559, 0x00b31cda,
+ 0x003910d4, 0x00ee1957, 0x006c4f54, 0x00bb46d7,
+ 0x0068e252, 0x00bfebd1, 0x003dbdd2, 0x00eab451,
+ 0x0040d06a, 0x0097d9e9, 0x00158fea, 0x00c28669,
+ 0x001122ec, 0x00c62b6f, 0x00447d6c, 0x009374ef,
+ 0x001978e1, 0x00ce7162, 0x004c2761, 0x009b2ee2,
+ 0x00488a67, 0x009f83e4, 0x001dd5e7, 0x00cadc64,
+ 0x0009ccfb, 0x00dec578, 0x005c937b, 0x008b9af8,
+ 0x00583e7d, 0x008f37fe, 0x000d61fd, 0x00da687e,
+ 0x00506470, 0x00876df3, 0x00053bf0, 0x00d23273,
+ 0x000196f6, 0x00d69f75, 0x0054c976, 0x0083c0f5,
+ 0x00a9041b, 0x007e0d98, 0x00fc5b9b, 0x002b5218,
+ 0x00f8f69d, 0x002fff1e, 0x00ada91d, 0x007aa09e,
+ 0x00f0ac90, 0x0027a513, 0x00a5f310, 0x0072fa93,
+ 0x00a15e16, 0x00765795, 0x00f40196, 0x00230815,
+ 0x00e0188a, 0x00371109, 0x00b5470a, 0x00624e89,
+ 0x00b1ea0c, 0x0066e38f, 0x00e4b58c, 0x0033bc0f,
+ 0x00b9b001, 0x006eb982, 0x00ecef81, 0x003be602,
+ 0x00e84287, 0x003f4b04, 0x00bd1d07, 0x006a1484,
+ 0x00c070bf, 0x0017793c, 0x00952f3f, 0x004226bc,
+ 0x00918239, 0x00468bba, 0x00c4ddb9, 0x0013d43a,
+ 0x0099d834, 0x004ed1b7, 0x00cc87b4, 0x001b8e37,
+ 0x00c82ab2, 0x001f2331, 0x009d7532, 0x004a7cb1,
+ 0x00896c2e, 0x005e65ad, 0x00dc33ae, 0x000b3a2d,
+ 0x00d89ea8, 0x000f972b, 0x008dc128, 0x005ac8ab,
+ 0x00d0c4a5, 0x0007cd26, 0x00859b25, 0x005292a6,
+ 0x00813623, 0x00563fa0, 0x00d469a3, 0x00036020,
+ 0x0080a0d5, 0x0057a956, 0x00d5ff55, 0x0002f6d6,
+ 0x00d15253, 0x00065bd0, 0x00840dd3, 0x00530450,
+ 0x00d9085e, 0x000e01dd, 0x008c57de, 0x005b5e5d,
+ 0x0088fad8, 0x005ff35b, 0x00dda558, 0x000aacdb,
+ 0x00c9bc44, 0x001eb5c7, 0x009ce3c4, 0x004bea47,
+ 0x00984ec2, 0x004f4741, 0x00cd1142, 0x001a18c1,
+ 0x009014cf, 0x00471d4c, 0x00c54b4f, 0x001242cc,
+ 0x00c1e649, 0x0016efca, 0x0094b9c9, 0x0043b04a,
+ 0x00e9d471, 0x003eddf2, 0x00bc8bf1, 0x006b8272,
+ 0x00b826f7, 0x006f2f74, 0x00ed7977, 0x003a70f4,
+ 0x00b07cfa, 0x00677579, 0x00e5237a, 0x00322af9,
+ 0x00e18e7c, 0x003687ff, 0x00b4d1fc, 0x0063d87f,
+ 0x00a0c8e0, 0x0077c163, 0x00f59760, 0x00229ee3,
+ 0x00f13a66, 0x002633e5, 0x00a465e6, 0x00736c65,
+ 0x00f9606b, 0x002e69e8, 0x00ac3feb, 0x007b3668,
+ 0x00a892ed, 0x007f9b6e, 0x00fdcd6d, 0x002ac4ee,
+ 0x00000000, 0x00520936, 0x00a4126c, 0x00f61b5a,
+ 0x004825d8, 0x001a2cee, 0x00ec37b4, 0x00be3e82,
+ 0x006b0636, 0x00390f00, 0x00cf145a, 0x009d1d6c,
+ 0x002323ee, 0x00712ad8, 0x00873182, 0x00d538b4,
+ 0x00d60c6c, 0x0084055a, 0x00721e00, 0x00201736,
+ 0x009e29b4, 0x00cc2082, 0x003a3bd8, 0x006832ee,
+ 0x00bd0a5a, 0x00ef036c, 0x00191836, 0x004b1100,
+ 0x00f52f82, 0x00a726b4, 0x00513dee, 0x000334d8,
+ 0x00ac19d8, 0x00fe10ee, 0x00080bb4, 0x005a0282,
+ 0x00e43c00, 0x00b63536, 0x00402e6c, 0x0012275a,
+ 0x00c71fee, 0x009516d8, 0x00630d82, 0x003104b4,
+ 0x008f3a36, 0x00dd3300, 0x002b285a, 0x0079216c,
+ 0x007a15b4, 0x00281c82, 0x00de07d8, 0x008c0eee,
+ 0x0032306c, 0x0060395a, 0x00962200, 0x00c42b36,
+ 0x00111382, 0x00431ab4, 0x00b501ee, 0x00e708d8,
+ 0x0059365a, 0x000b3f6c, 0x00fd2436, 0x00af2d00,
+ 0x00a37f36, 0x00f17600, 0x00076d5a, 0x0055646c,
+ 0x00eb5aee, 0x00b953d8, 0x004f4882, 0x001d41b4,
+ 0x00c87900, 0x009a7036, 0x006c6b6c, 0x003e625a,
+ 0x00805cd8, 0x00d255ee, 0x00244eb4, 0x00764782,
+ 0x0075735a, 0x00277a6c, 0x00d16136, 0x00836800,
+ 0x003d5682, 0x006f5fb4, 0x009944ee, 0x00cb4dd8,
+ 0x001e756c, 0x004c7c5a, 0x00ba6700, 0x00e86e36,
+ 0x005650b4, 0x00045982, 0x00f242d8, 0x00a04bee,
+ 0x000f66ee, 0x005d6fd8, 0x00ab7482, 0x00f97db4,
+ 0x00474336, 0x00154a00, 0x00e3515a, 0x00b1586c,
+ 0x006460d8, 0x003669ee, 0x00c072b4, 0x00927b82,
+ 0x002c4500, 0x007e4c36, 0x0088576c, 0x00da5e5a,
+ 0x00d96a82, 0x008b63b4, 0x007d78ee, 0x002f71d8,
+ 0x00914f5a, 0x00c3466c, 0x00355d36, 0x00675400,
+ 0x00b26cb4, 0x00e06582, 0x00167ed8, 0x004477ee,
+ 0x00fa496c, 0x00a8405a, 0x005e5b00, 0x000c5236,
+ 0x0046ff6c, 0x0014f65a, 0x00e2ed00, 0x00b0e436,
+ 0x000edab4, 0x005cd382, 0x00aac8d8, 0x00f8c1ee,
+ 0x002df95a, 0x007ff06c, 0x0089eb36, 0x00dbe200,
+ 0x0065dc82, 0x0037d5b4, 0x00c1ceee, 0x0093c7d8,
+ 0x0090f300, 0x00c2fa36, 0x0034e16c, 0x0066e85a,
+ 0x00d8d6d8, 0x008adfee, 0x007cc4b4, 0x002ecd82,
+ 0x00fbf536, 0x00a9fc00, 0x005fe75a, 0x000dee6c,
+ 0x00b3d0ee, 0x00e1d9d8, 0x0017c282, 0x0045cbb4,
+ 0x00eae6b4, 0x00b8ef82, 0x004ef4d8, 0x001cfdee,
+ 0x00a2c36c, 0x00f0ca5a, 0x0006d100, 0x0054d836,
+ 0x0081e082, 0x00d3e9b4, 0x0025f2ee, 0x0077fbd8,
+ 0x00c9c55a, 0x009bcc6c, 0x006dd736, 0x003fde00,
+ 0x003cead8, 0x006ee3ee, 0x0098f8b4, 0x00caf182,
+ 0x0074cf00, 0x0026c636, 0x00d0dd6c, 0x0082d45a,
+ 0x0057ecee, 0x0005e5d8, 0x00f3fe82, 0x00a1f7b4,
+ 0x001fc936, 0x004dc000, 0x00bbdb5a, 0x00e9d26c,
+ 0x00e5805a, 0x00b7896c, 0x00419236, 0x00139b00,
+ 0x00ada582, 0x00ffacb4, 0x0009b7ee, 0x005bbed8,
+ 0x008e866c, 0x00dc8f5a, 0x002a9400, 0x00789d36,
+ 0x00c6a3b4, 0x0094aa82, 0x0062b1d8, 0x0030b8ee,
+ 0x00338c36, 0x00618500, 0x00979e5a, 0x00c5976c,
+ 0x007ba9ee, 0x0029a0d8, 0x00dfbb82, 0x008db2b4,
+ 0x00588a00, 0x000a8336, 0x00fc986c, 0x00ae915a,
+ 0x0010afd8, 0x0042a6ee, 0x00b4bdb4, 0x00e6b482,
+ 0x00499982, 0x001b90b4, 0x00ed8bee, 0x00bf82d8,
+ 0x0001bc5a, 0x0053b56c, 0x00a5ae36, 0x00f7a700,
+ 0x00229fb4, 0x00709682, 0x00868dd8, 0x00d484ee,
+ 0x006aba6c, 0x0038b35a, 0x00cea800, 0x009ca136,
+ 0x009f95ee, 0x00cd9cd8, 0x003b8782, 0x00698eb4,
+ 0x00d7b036, 0x0085b900, 0x0073a25a, 0x0021ab6c,
+ 0x00f493d8, 0x00a69aee, 0x005081b4, 0x00028882,
+ 0x00bcb600, 0x00eebf36, 0x0018a46c, 0x004aad5a
+};
+
+static inline
+u32 crc24_init (void)
+{
+ return 0xce04b7;
+}
+
+static inline
+u32 crc24_next (u32 crc, byte data)
+{
+ return (crc >> 8) ^ crc24_table[(crc & 0xff) ^ data];
+}
+
+/*
+ * Process 4 bytes in one go