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authorThomas Gleixner <tglx@linutronix.de>2005-11-07 06:15:37 -0500
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-07 08:25:38 -0500
commit03ead8427d65f6986a8bf5fd3f29a879348780ad (patch)
treea70bff642d66eb3dbafd31e017f0f9783ffca6c2 /lib/reed_solomon/reed_solomon.c
parent182ec4eee397543101a6db8906ed88727d3f7e53 (diff)
[LIB] reed_solomon: Clean up trailing white spaces
Diffstat (limited to 'lib/reed_solomon/reed_solomon.c')
-rw-r--r--lib/reed_solomon/reed_solomon.c64
1 files changed, 32 insertions, 32 deletions
diff --git a/lib/reed_solomon/reed_solomon.c b/lib/reed_solomon/reed_solomon.c
index 6604e3b1940..f5fef948a41 100644
--- a/lib/reed_solomon/reed_solomon.c
+++ b/lib/reed_solomon/reed_solomon.c
@@ -1,22 +1,22 @@
1/* 1/*
2 * lib/reed_solomon/rslib.c 2 * lib/reed_solomon/rslib.c
3 * 3 *
4 * Overview: 4 * Overview:
5 * Generic Reed Solomon encoder / decoder library 5 * Generic Reed Solomon encoder / decoder library
6 * 6 *
7 * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de) 7 * Copyright (C) 2004 Thomas Gleixner (tglx@linutronix.de)
8 * 8 *
9 * Reed Solomon code lifted from reed solomon library written by Phil Karn 9 * Reed Solomon code lifted from reed solomon library written by Phil Karn
10 * Copyright 2002 Phil Karn, KA9Q 10 * Copyright 2002 Phil Karn, KA9Q
11 * 11 *
12 * $Id: rslib.c,v 1.5 2004/10/22 15:41:47 gleixner Exp $ 12 * $Id: rslib.c,v 1.7 2005/11/07 11:14:59 gleixner Exp $
13 * 13 *
14 * This program is free software; you can redistribute it and/or modify 14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as 15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation. 16 * published by the Free Software Foundation.
17 * 17 *
18 * Description: 18 * Description:
19 * 19 *
20 * The generic Reed Solomon library provides runtime configurable 20 * The generic Reed Solomon library provides runtime configurable
21 * encoding / decoding of RS codes. 21 * encoding / decoding of RS codes.
22 * Each user must call init_rs to get a pointer to a rs_control 22 * Each user must call init_rs to get a pointer to a rs_control
@@ -25,11 +25,11 @@
25 * If a structure is generated then the polynomial arrays for 25 * If a structure is generated then the polynomial arrays for
26 * fast encoding / decoding are built. This can take some time so 26 * fast encoding / decoding are built. This can take some time so
27 * make sure not to call this function from a time critical path. 27 * make sure not to call this function from a time critical path.
28 * Usually a module / driver should initialize the necessary 28 * Usually a module / driver should initialize the necessary
29 * rs_control structure on module / driver init and release it 29 * rs_control structure on module / driver init and release it
30 * on exit. 30 * on exit.
31 * The encoding puts the calculated syndrome into a given syndrome 31 * The encoding puts the calculated syndrome into a given syndrome
32 * buffer. 32 * buffer.
33 * The decoding is a two step process. The first step calculates 33 * The decoding is a two step process. The first step calculates
34 * the syndrome over the received (data + syndrome) and calls the 34 * the syndrome over the received (data + syndrome) and calls the
35 * second stage, which does the decoding / error correction itself. 35 * second stage, which does the decoding / error correction itself.
@@ -51,7 +51,7 @@ static LIST_HEAD (rslist);
51/* Protection for the list */ 51/* Protection for the list */
52static DECLARE_MUTEX(rslistlock); 52static DECLARE_MUTEX(rslistlock);
53 53
54/** 54/**
55 * rs_init - Initialize a Reed-Solomon codec 55 * rs_init - Initialize a Reed-Solomon codec
56 * 56 *
57 * @symsize: symbol size, bits (1-8) 57 * @symsize: symbol size, bits (1-8)
@@ -63,7 +63,7 @@ static DECLARE_MUTEX(rslistlock);
63 * Allocate a control structure and the polynom arrays for faster 63 * Allocate a control structure and the polynom arrays for faster
64 * en/decoding. Fill the arrays according to the given parameters 64 * en/decoding. Fill the arrays according to the given parameters
65 */ 65 */
66static struct rs_control *rs_init(int symsize, int gfpoly, int fcr, 66static struct rs_control *rs_init(int symsize, int gfpoly, int fcr,
67 int prim, int nroots) 67 int prim, int nroots)
68{ 68{
69 struct rs_control *rs; 69 struct rs_control *rs;
@@ -124,15 +124,15 @@ static struct rs_control *rs_init(int symsize, int gfpoly, int fcr,
124 /* Multiply rs->genpoly[] by @**(root + x) */ 124 /* Multiply rs->genpoly[] by @**(root + x) */
125 for (j = i; j > 0; j--) { 125 for (j = i; j > 0; j--) {
126 if (rs->genpoly[j] != 0) { 126 if (rs->genpoly[j] != 0) {
127 rs->genpoly[j] = rs->genpoly[j -1] ^ 127 rs->genpoly[j] = rs->genpoly[j -1] ^
128 rs->alpha_to[rs_modnn(rs, 128 rs->alpha_to[rs_modnn(rs,
129 rs->index_of[rs->genpoly[j]] + root)]; 129 rs->index_of[rs->genpoly[j]] + root)];
130 } else 130 } else
131 rs->genpoly[j] = rs->genpoly[j - 1]; 131 rs->genpoly[j] = rs->genpoly[j - 1];
132 } 132 }
133 /* rs->genpoly[0] can never be zero */ 133 /* rs->genpoly[0] can never be zero */
134 rs->genpoly[0] = 134 rs->genpoly[0] =
135 rs->alpha_to[rs_modnn(rs, 135 rs->alpha_to[rs_modnn(rs,
136 rs->index_of[rs->genpoly[0]] + root)]; 136 rs->index_of[rs->genpoly[0]] + root)];
137 } 137 }
138 /* convert rs->genpoly[] to index form for quicker encoding */ 138 /* convert rs->genpoly[] to index form for quicker encoding */
@@ -153,7 +153,7 @@ errrs:
153} 153}
154 154
155 155
156/** 156/**
157 * free_rs - Free the rs control structure, if its not longer used 157 * free_rs - Free the rs control structure, if its not longer used
158 * 158 *
159 * @rs: the control structure which is not longer used by the 159 * @rs: the control structure which is not longer used by the
@@ -173,19 +173,19 @@ void free_rs(struct rs_control *rs)
173 up(&rslistlock); 173 up(&rslistlock);
174} 174}
175 175
176/** 176/**
177 * init_rs - Find a matching or allocate a new rs control structure 177 * init_rs - Find a matching or allocate a new rs control structure
178 * 178 *
179 * @symsize: the symbol size (number of bits) 179 * @symsize: the symbol size (number of bits)
180 * @gfpoly: the extended Galois field generator polynomial coefficients, 180 * @gfpoly: the extended Galois field generator polynomial coefficients,
181 * with the 0th coefficient in the low order bit. The polynomial 181 * with the 0th coefficient in the low order bit. The polynomial
182 * must be primitive; 182 * must be primitive;
183 * @fcr: the first consecutive root of the rs code generator polynomial 183 * @fcr: the first consecutive root of the rs code generator polynomial
184 * in index form 184 * in index form
185 * @prim: primitive element to generate polynomial roots 185 * @prim: primitive element to generate polynomial roots
186 * @nroots: RS code generator polynomial degree (number of roots) 186 * @nroots: RS code generator polynomial degree (number of roots)
187 */ 187 */
188struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim, 188struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
189 int nroots) 189 int nroots)
190{ 190{
191 struct list_head *tmp; 191 struct list_head *tmp;
@@ -198,9 +198,9 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
198 return NULL; 198 return NULL;
199 if (prim <= 0 || prim >= (1<<symsize)) 199 if (prim <= 0 || prim >= (1<<symsize))
200 return NULL; 200 return NULL;
201 if (nroots < 0 || nroots >= (1<<symsize) || nroots > 8) 201 if (nroots < 0 || nroots >= (1<<symsize))
202 return NULL; 202 return NULL;
203 203
204 down(&rslistlock); 204 down(&rslistlock);
205 205
206 /* Walk through the list and look for a matching entry */ 206 /* Walk through the list and look for a matching entry */
@@ -211,9 +211,9 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
211 if (gfpoly != rs->gfpoly) 211 if (gfpoly != rs->gfpoly)
212 continue; 212 continue;
213 if (fcr != rs->fcr) 213 if (fcr != rs->fcr)
214 continue; 214 continue;
215 if (prim != rs->prim) 215 if (prim != rs->prim)
216 continue; 216 continue;
217 if (nroots != rs->nroots) 217 if (nroots != rs->nroots)
218 continue; 218 continue;
219 /* We have a matching one already */ 219 /* We have a matching one already */
@@ -227,18 +227,18 @@ struct rs_control *init_rs(int symsize, int gfpoly, int fcr, int prim,
227 rs->users = 1; 227 rs->users = 1;
228 list_add(&rs->list, &rslist); 228 list_add(&rs->list, &rslist);
229 } 229 }
230out: 230out:
231 up(&rslistlock); 231 up(&rslistlock);
232 return rs; 232 return rs;
233} 233}
234 234
235#ifdef CONFIG_REED_SOLOMON_ENC8 235#ifdef CONFIG_REED_SOLOMON_ENC8
236/** 236/**
237 * encode_rs8 - Calculate the parity for data values (8bit data width) 237 * encode_rs8 - Calculate the parity for data values (8bit data width)
238 * 238 *
239 * @rs: the rs control structure 239 * @rs: the rs control structure
240 * @data: data field of a given type 240 * @data: data field of a given type
241 * @len: data length 241 * @len: data length
242 * @par: parity data, must be initialized by caller (usually all 0) 242 * @par: parity data, must be initialized by caller (usually all 0)
243 * @invmsk: invert data mask (will be xored on data) 243 * @invmsk: invert data mask (will be xored on data)
244 * 244 *
@@ -246,7 +246,7 @@ out:
246 * symbol size > 8. The calling code must take care of encoding of the 246 * symbol size > 8. The calling code must take care of encoding of the
247 * syndrome result for storage itself. 247 * syndrome result for storage itself.
248 */ 248 */
249int encode_rs8(struct rs_control *rs, uint8_t *data, int len, uint16_t *par, 249int encode_rs8(struct rs_control *rs, uint8_t *data, int len, uint16_t *par,
250 uint16_t invmsk) 250 uint16_t invmsk)
251{ 251{
252#include "encode_rs.c" 252#include "encode_rs.c"
@@ -255,7 +255,7 @@ EXPORT_SYMBOL_GPL(encode_rs8);
255#endif 255#endif
256 256
257#ifdef CONFIG_REED_SOLOMON_DEC8 257#ifdef CONFIG_REED_SOLOMON_DEC8
258/** 258/**
259 * decode_rs8 - Decode codeword (8bit data width) 259 * decode_rs8 - Decode codeword (8bit data width)
260 * 260 *
261 * @rs: the rs control structure 261 * @rs: the rs control structure
@@ -273,7 +273,7 @@ EXPORT_SYMBOL_GPL(encode_rs8);
273 * syndrome result and the received parity before calling this code. 273 * syndrome result and the received parity before calling this code.
274 */ 274 */
275int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len, 275int decode_rs8(struct rs_control *rs, uint8_t *data, uint16_t *par, int len,
276 uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, 276 uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk,
277 uint16_t *corr) 277 uint16_t *corr)
278{ 278{
279#include "decode_rs.c" 279#include "decode_rs.c"
@@ -287,13 +287,13 @@ EXPORT_SYMBOL_GPL(decode_rs8);
287 * 287 *
288 * @rs: the rs control structure 288 * @rs: the rs control structure
289 * @data: data field of a given type 289 * @data: data field of a given type
290 * @len: data length 290 * @len: data length
291 * @par: parity data, must be initialized by caller (usually all 0) 291 * @par: parity data, must be initialized by caller (usually all 0)
292 * @invmsk: invert data mask (will be xored on data, not on parity!) 292 * @invmsk: invert data mask (will be xored on data, not on parity!)
293 * 293 *
294 * Each field in the data array contains up to symbol size bits of valid data. 294 * Each field in the data array contains up to symbol size bits of valid data.
295 */ 295 */
296int encode_rs16(struct rs_control *rs, uint16_t *data, int len, uint16_t *par, 296int encode_rs16(struct rs_control *rs, uint16_t *data, int len, uint16_t *par,
297 uint16_t invmsk) 297 uint16_t invmsk)
298{ 298{
299#include "encode_rs.c" 299#include "encode_rs.c"
@@ -302,7 +302,7 @@ EXPORT_SYMBOL_GPL(encode_rs16);
302#endif 302#endif
303 303
304#ifdef CONFIG_REED_SOLOMON_DEC16 304#ifdef CONFIG_REED_SOLOMON_DEC16
305/** 305/**
306 * decode_rs16 - Decode codeword (16bit data width) 306 * decode_rs16 - Decode codeword (16bit data width)
307 * 307 *
308 * @rs: the rs control structure 308 * @rs: the rs control structure
@@ -312,13 +312,13 @@ EXPORT_SYMBOL_GPL(encode_rs16);
312 * @s: syndrome data field (if NULL, syndrome is calculated) 312 * @s: syndrome data field (if NULL, syndrome is calculated)
313 * @no_eras: number of erasures 313 * @no_eras: number of erasures
314 * @eras_pos: position of erasures, can be NULL 314 * @eras_pos: position of erasures, can be NULL
315 * @invmsk: invert data mask (will be xored on data, not on parity!) 315 * @invmsk: invert data mask (will be xored on data, not on parity!)
316 * @corr: buffer to store correction bitmask on eras_pos 316 * @corr: buffer to store correction bitmask on eras_pos
317 * 317 *
318 * Each field in the data array contains up to symbol size bits of valid data. 318 * Each field in the data array contains up to symbol size bits of valid data.
319 */ 319 */
320int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len, 320int decode_rs16(struct rs_control *rs, uint16_t *data, uint16_t *par, int len,
321 uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk, 321 uint16_t *s, int no_eras, int *eras_pos, uint16_t invmsk,
322 uint16_t *corr) 322 uint16_t *corr)
323{ 323{
324#include "decode_rs.c" 324#include "decode_rs.c"