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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * NAND flash simulator. | |
3 | * | |
4 | * Author: Artem B. Bityuckiy <dedekind@oktetlabs.ru>, <dedekind@infradead.org> | |
5 | * | |
61b03bd7 | 6 | * Copyright (C) 2004 Nokia Corporation |
1da177e4 LT |
7 | * |
8 | * Note: NS means "NAND Simulator". | |
9 | * Note: Input means input TO flash chip, output means output FROM chip. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2, or (at your option) any later | |
14 | * version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, but | |
17 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | |
19 | * Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA | |
1da177e4 LT |
24 | */ |
25 | ||
63fa37f0 SP |
26 | #define pr_fmt(fmt) "[nandsim]" fmt |
27 | ||
1da177e4 LT |
28 | #include <linux/init.h> |
29 | #include <linux/types.h> | |
30 | #include <linux/module.h> | |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/vmalloc.h> | |
596fd462 | 33 | #include <linux/math64.h> |
1da177e4 LT |
34 | #include <linux/slab.h> |
35 | #include <linux/errno.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/mtd/mtd.h> | |
d4092d76 | 38 | #include <linux/mtd/rawnand.h> |
fc2ff592 | 39 | #include <linux/mtd/nand_bch.h> |
1da177e4 LT |
40 | #include <linux/mtd/partitions.h> |
41 | #include <linux/delay.h> | |
2b77a0ed | 42 | #include <linux/list.h> |
514087e7 | 43 | #include <linux/random.h> |
a5cce42f | 44 | #include <linux/sched.h> |
dcbe8214 | 45 | #include <linux/sched/mm.h> |
a9fc8991 AH |
46 | #include <linux/fs.h> |
47 | #include <linux/pagemap.h> | |
5346c27c EG |
48 | #include <linux/seq_file.h> |
49 | #include <linux/debugfs.h> | |
1da177e4 LT |
50 | |
51 | /* Default simulator parameters values */ | |
52 | #if !defined(CONFIG_NANDSIM_FIRST_ID_BYTE) || \ | |
53 | !defined(CONFIG_NANDSIM_SECOND_ID_BYTE) || \ | |
54 | !defined(CONFIG_NANDSIM_THIRD_ID_BYTE) || \ | |
55 | !defined(CONFIG_NANDSIM_FOURTH_ID_BYTE) | |
56 | #define CONFIG_NANDSIM_FIRST_ID_BYTE 0x98 | |
57 | #define CONFIG_NANDSIM_SECOND_ID_BYTE 0x39 | |
58 | #define CONFIG_NANDSIM_THIRD_ID_BYTE 0xFF /* No byte */ | |
59 | #define CONFIG_NANDSIM_FOURTH_ID_BYTE 0xFF /* No byte */ | |
60 | #endif | |
61 | ||
62 | #ifndef CONFIG_NANDSIM_ACCESS_DELAY | |
63 | #define CONFIG_NANDSIM_ACCESS_DELAY 25 | |
64 | #endif | |
65 | #ifndef CONFIG_NANDSIM_PROGRAMM_DELAY | |
66 | #define CONFIG_NANDSIM_PROGRAMM_DELAY 200 | |
67 | #endif | |
68 | #ifndef CONFIG_NANDSIM_ERASE_DELAY | |
69 | #define CONFIG_NANDSIM_ERASE_DELAY 2 | |
70 | #endif | |
71 | #ifndef CONFIG_NANDSIM_OUTPUT_CYCLE | |
72 | #define CONFIG_NANDSIM_OUTPUT_CYCLE 40 | |
73 | #endif | |
74 | #ifndef CONFIG_NANDSIM_INPUT_CYCLE | |
75 | #define CONFIG_NANDSIM_INPUT_CYCLE 50 | |
76 | #endif | |
77 | #ifndef CONFIG_NANDSIM_BUS_WIDTH | |
78 | #define CONFIG_NANDSIM_BUS_WIDTH 8 | |
79 | #endif | |
80 | #ifndef CONFIG_NANDSIM_DO_DELAYS | |
81 | #define CONFIG_NANDSIM_DO_DELAYS 0 | |
82 | #endif | |
83 | #ifndef CONFIG_NANDSIM_LOG | |
84 | #define CONFIG_NANDSIM_LOG 0 | |
85 | #endif | |
86 | #ifndef CONFIG_NANDSIM_DBG | |
87 | #define CONFIG_NANDSIM_DBG 0 | |
88 | #endif | |
e99e90ae BH |
89 | #ifndef CONFIG_NANDSIM_MAX_PARTS |
90 | #define CONFIG_NANDSIM_MAX_PARTS 32 | |
91 | #endif | |
1da177e4 | 92 | |
1da177e4 LT |
93 | static uint access_delay = CONFIG_NANDSIM_ACCESS_DELAY; |
94 | static uint programm_delay = CONFIG_NANDSIM_PROGRAMM_DELAY; | |
95 | static uint erase_delay = CONFIG_NANDSIM_ERASE_DELAY; | |
96 | static uint output_cycle = CONFIG_NANDSIM_OUTPUT_CYCLE; | |
97 | static uint input_cycle = CONFIG_NANDSIM_INPUT_CYCLE; | |
98 | static uint bus_width = CONFIG_NANDSIM_BUS_WIDTH; | |
99 | static uint do_delays = CONFIG_NANDSIM_DO_DELAYS; | |
100 | static uint log = CONFIG_NANDSIM_LOG; | |
101 | static uint dbg = CONFIG_NANDSIM_DBG; | |
e99e90ae | 102 | static unsigned long parts[CONFIG_NANDSIM_MAX_PARTS]; |
2b77a0ed | 103 | static unsigned int parts_num; |
514087e7 AH |
104 | static char *badblocks = NULL; |
105 | static char *weakblocks = NULL; | |
106 | static char *weakpages = NULL; | |
107 | static unsigned int bitflips = 0; | |
108 | static char *gravepages = NULL; | |
a5ac8aeb | 109 | static unsigned int overridesize = 0; |
a9fc8991 | 110 | static char *cache_file = NULL; |
ce85b79f | 111 | static unsigned int bbt; |
fc2ff592 | 112 | static unsigned int bch; |
b00358a5 AM |
113 | static u_char id_bytes[8] = { |
114 | [0] = CONFIG_NANDSIM_FIRST_ID_BYTE, | |
115 | [1] = CONFIG_NANDSIM_SECOND_ID_BYTE, | |
116 | [2] = CONFIG_NANDSIM_THIRD_ID_BYTE, | |
117 | [3] = CONFIG_NANDSIM_FOURTH_ID_BYTE, | |
118 | [4 ... 7] = 0xFF, | |
119 | }; | |
1da177e4 | 120 | |
b00358a5 AM |
121 | module_param_array(id_bytes, byte, NULL, 0400); |
122 | module_param_named(first_id_byte, id_bytes[0], byte, 0400); | |
123 | module_param_named(second_id_byte, id_bytes[1], byte, 0400); | |
124 | module_param_named(third_id_byte, id_bytes[2], byte, 0400); | |
125 | module_param_named(fourth_id_byte, id_bytes[3], byte, 0400); | |
1da177e4 LT |
126 | module_param(access_delay, uint, 0400); |
127 | module_param(programm_delay, uint, 0400); | |
128 | module_param(erase_delay, uint, 0400); | |
129 | module_param(output_cycle, uint, 0400); | |
130 | module_param(input_cycle, uint, 0400); | |
131 | module_param(bus_width, uint, 0400); | |
132 | module_param(do_delays, uint, 0400); | |
133 | module_param(log, uint, 0400); | |
134 | module_param(dbg, uint, 0400); | |
2b77a0ed | 135 | module_param_array(parts, ulong, &parts_num, 0400); |
514087e7 AH |
136 | module_param(badblocks, charp, 0400); |
137 | module_param(weakblocks, charp, 0400); | |
138 | module_param(weakpages, charp, 0400); | |
139 | module_param(bitflips, uint, 0400); | |
140 | module_param(gravepages, charp, 0400); | |
a5ac8aeb | 141 | module_param(overridesize, uint, 0400); |
a9fc8991 | 142 | module_param(cache_file, charp, 0400); |
ce85b79f | 143 | module_param(bbt, uint, 0400); |
fc2ff592 | 144 | module_param(bch, uint, 0400); |
1da177e4 | 145 | |
b00358a5 AM |
146 | MODULE_PARM_DESC(id_bytes, "The ID bytes returned by NAND Flash 'read ID' command"); |
147 | MODULE_PARM_DESC(first_id_byte, "The first byte returned by NAND Flash 'read ID' command (manufacturer ID) (obsolete)"); | |
148 | MODULE_PARM_DESC(second_id_byte, "The second byte returned by NAND Flash 'read ID' command (chip ID) (obsolete)"); | |
149 | MODULE_PARM_DESC(third_id_byte, "The third byte returned by NAND Flash 'read ID' command (obsolete)"); | |
150 | MODULE_PARM_DESC(fourth_id_byte, "The fourth byte returned by NAND Flash 'read ID' command (obsolete)"); | |
a9fc8991 | 151 | MODULE_PARM_DESC(access_delay, "Initial page access delay (microseconds)"); |
1da177e4 LT |
152 | MODULE_PARM_DESC(programm_delay, "Page programm delay (microseconds"); |
153 | MODULE_PARM_DESC(erase_delay, "Sector erase delay (milliseconds)"); | |
6029a3a4 AY |
154 | MODULE_PARM_DESC(output_cycle, "Word output (from flash) time (nanoseconds)"); |
155 | MODULE_PARM_DESC(input_cycle, "Word input (to flash) time (nanoseconds)"); | |
1da177e4 LT |
156 | MODULE_PARM_DESC(bus_width, "Chip's bus width (8- or 16-bit)"); |
157 | MODULE_PARM_DESC(do_delays, "Simulate NAND delays using busy-waits if not zero"); | |
158 | MODULE_PARM_DESC(log, "Perform logging if not zero"); | |
159 | MODULE_PARM_DESC(dbg, "Output debug information if not zero"); | |
2b77a0ed | 160 | MODULE_PARM_DESC(parts, "Partition sizes (in erase blocks) separated by commas"); |
514087e7 AH |
161 | /* Page and erase block positions for the following parameters are independent of any partitions */ |
162 | MODULE_PARM_DESC(badblocks, "Erase blocks that are initially marked bad, separated by commas"); | |
163 | MODULE_PARM_DESC(weakblocks, "Weak erase blocks [: remaining erase cycles (defaults to 3)]" | |
164 | " separated by commas e.g. 113:2 means eb 113" | |
165 | " can be erased only twice before failing"); | |
166 | MODULE_PARM_DESC(weakpages, "Weak pages [: maximum writes (defaults to 3)]" | |
167 | " separated by commas e.g. 1401:2 means page 1401" | |
168 | " can be written only twice before failing"); | |
169 | MODULE_PARM_DESC(bitflips, "Maximum number of random bit flips per page (zero by default)"); | |
170 | MODULE_PARM_DESC(gravepages, "Pages that lose data [: maximum reads (defaults to 3)]" | |
171 | " separated by commas e.g. 1401:2 means page 1401" | |
172 | " can be read only twice before failing"); | |
a5ac8aeb AH |
173 | MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the ID bytes. " |
174 | "The size is specified in erase blocks and as the exponent of a power of two" | |
175 | " e.g. 5 means a size of 32 erase blocks"); | |
a9fc8991 | 176 | MODULE_PARM_DESC(cache_file, "File to use to cache nand pages instead of memory"); |
ce85b79f | 177 | MODULE_PARM_DESC(bbt, "0 OOB, 1 BBT with marker in OOB, 2 BBT with marker in data area"); |
fc2ff592 ID |
178 | MODULE_PARM_DESC(bch, "Enable BCH ecc and set how many bits should " |
179 | "be correctable in 512-byte blocks"); | |
1da177e4 LT |
180 | |
181 | /* The largest possible page size */ | |
75352662 | 182 | #define NS_LARGEST_PAGE_SIZE 4096 |
61b03bd7 | 183 | |
1da177e4 LT |
184 | /* Simulator's output macros (logging, debugging, warning, error) */ |
185 | #define NS_LOG(args...) \ | |
63fa37f0 | 186 | do { if (log) pr_debug(" log: " args); } while(0) |
1da177e4 | 187 | #define NS_DBG(args...) \ |
63fa37f0 | 188 | do { if (dbg) pr_debug(" debug: " args); } while(0) |
1da177e4 | 189 | #define NS_WARN(args...) \ |
63fa37f0 | 190 | do { pr_warn(" warning: " args); } while(0) |
1da177e4 | 191 | #define NS_ERR(args...) \ |
63fa37f0 | 192 | do { pr_err(" error: " args); } while(0) |
57aa6b54 | 193 | #define NS_INFO(args...) \ |
63fa37f0 | 194 | do { pr_info(" " args); } while(0) |
1da177e4 LT |
195 | |
196 | /* Busy-wait delay macros (microseconds, milliseconds) */ | |
197 | #define NS_UDELAY(us) \ | |
198 | do { if (do_delays) udelay(us); } while(0) | |
199 | #define NS_MDELAY(us) \ | |
200 | do { if (do_delays) mdelay(us); } while(0) | |
61b03bd7 | 201 | |
1da177e4 LT |
202 | /* Is the nandsim structure initialized ? */ |
203 | #define NS_IS_INITIALIZED(ns) ((ns)->geom.totsz != 0) | |
204 | ||
205 | /* Good operation completion status */ | |
206 | #define NS_STATUS_OK(ns) (NAND_STATUS_READY | (NAND_STATUS_WP * ((ns)->lines.wp == 0))) | |
207 | ||
208 | /* Operation failed completion status */ | |
61b03bd7 | 209 | #define NS_STATUS_FAILED(ns) (NAND_STATUS_FAIL | NS_STATUS_OK(ns)) |
1da177e4 LT |
210 | |
211 | /* Calculate the page offset in flash RAM image by (row, column) address */ | |
212 | #define NS_RAW_OFFSET(ns) \ | |
3b8b8fa1 | 213 | (((ns)->regs.row * (ns)->geom.pgszoob) + (ns)->regs.column) |
61b03bd7 | 214 | |
1da177e4 LT |
215 | /* Calculate the OOB offset in flash RAM image by (row, column) address */ |
216 | #define NS_RAW_OFFSET_OOB(ns) (NS_RAW_OFFSET(ns) + ns->geom.pgsz) | |
217 | ||
218 | /* After a command is input, the simulator goes to one of the following states */ | |
219 | #define STATE_CMD_READ0 0x00000001 /* read data from the beginning of page */ | |
220 | #define STATE_CMD_READ1 0x00000002 /* read data from the second half of page */ | |
4a0c50c0 | 221 | #define STATE_CMD_READSTART 0x00000003 /* read data second command (large page devices) */ |
daf05ec0 | 222 | #define STATE_CMD_PAGEPROG 0x00000004 /* start page program */ |
1da177e4 LT |
223 | #define STATE_CMD_READOOB 0x00000005 /* read OOB area */ |
224 | #define STATE_CMD_ERASE1 0x00000006 /* sector erase first command */ | |
225 | #define STATE_CMD_STATUS 0x00000007 /* read status */ | |
daf05ec0 | 226 | #define STATE_CMD_SEQIN 0x00000009 /* sequential data input */ |
1da177e4 LT |
227 | #define STATE_CMD_READID 0x0000000A /* read ID */ |
228 | #define STATE_CMD_ERASE2 0x0000000B /* sector erase second command */ | |
229 | #define STATE_CMD_RESET 0x0000000C /* reset */ | |
74216be4 AB |
230 | #define STATE_CMD_RNDOUT 0x0000000D /* random output command */ |
231 | #define STATE_CMD_RNDOUTSTART 0x0000000E /* random output start command */ | |
1da177e4 LT |
232 | #define STATE_CMD_MASK 0x0000000F /* command states mask */ |
233 | ||
8e87d782 | 234 | /* After an address is input, the simulator goes to one of these states */ |
1da177e4 LT |
235 | #define STATE_ADDR_PAGE 0x00000010 /* full (row, column) address is accepted */ |
236 | #define STATE_ADDR_SEC 0x00000020 /* sector address was accepted */ | |
74216be4 AB |
237 | #define STATE_ADDR_COLUMN 0x00000030 /* column address was accepted */ |
238 | #define STATE_ADDR_ZERO 0x00000040 /* one byte zero address was accepted */ | |
239 | #define STATE_ADDR_MASK 0x00000070 /* address states mask */ | |
1da177e4 | 240 | |
daf05ec0 | 241 | /* During data input/output the simulator is in these states */ |
1da177e4 LT |
242 | #define STATE_DATAIN 0x00000100 /* waiting for data input */ |
243 | #define STATE_DATAIN_MASK 0x00000100 /* data input states mask */ | |
244 | ||
245 | #define STATE_DATAOUT 0x00001000 /* waiting for page data output */ | |
246 | #define STATE_DATAOUT_ID 0x00002000 /* waiting for ID bytes output */ | |
247 | #define STATE_DATAOUT_STATUS 0x00003000 /* waiting for status output */ | |
1da177e4 LT |
248 | #define STATE_DATAOUT_MASK 0x00007000 /* data output states mask */ |
249 | ||
250 | /* Previous operation is done, ready to accept new requests */ | |
251 | #define STATE_READY 0x00000000 | |
252 | ||
253 | /* This state is used to mark that the next state isn't known yet */ | |
254 | #define STATE_UNKNOWN 0x10000000 | |
255 | ||
256 | /* Simulator's actions bit masks */ | |
257 | #define ACTION_CPY 0x00100000 /* copy page/OOB to the internal buffer */ | |
daf05ec0 | 258 | #define ACTION_PRGPAGE 0x00200000 /* program the internal buffer to flash */ |
1da177e4 LT |
259 | #define ACTION_SECERASE 0x00300000 /* erase sector */ |
260 | #define ACTION_ZEROOFF 0x00400000 /* don't add any offset to address */ | |
261 | #define ACTION_HALFOFF 0x00500000 /* add to address half of page */ | |
262 | #define ACTION_OOBOFF 0x00600000 /* add to address OOB offset */ | |
263 | #define ACTION_MASK 0x00700000 /* action mask */ | |
264 | ||
74216be4 | 265 | #define NS_OPER_NUM 13 /* Number of operations supported by the simulator */ |
1da177e4 LT |
266 | #define NS_OPER_STATES 6 /* Maximum number of states in operation */ |
267 | ||
268 | #define OPT_ANY 0xFFFFFFFF /* any chip supports this operation */ | |
1da177e4 LT |
269 | #define OPT_PAGE512 0x00000002 /* 512-byte page chips */ |
270 | #define OPT_PAGE2048 0x00000008 /* 2048-byte page chips */ | |
1da177e4 | 271 | #define OPT_PAGE512_8BIT 0x00000040 /* 512-byte page chips with 8-bit bus width */ |
75352662 SAS |
272 | #define OPT_PAGE4096 0x00000080 /* 4096-byte page chips */ |
273 | #define OPT_LARGEPAGE (OPT_PAGE2048 | OPT_PAGE4096) /* 2048 & 4096-byte page chips */ | |
51148f1f | 274 | #define OPT_SMALLPAGE (OPT_PAGE512) /* 512-byte page chips */ |
1da177e4 | 275 | |
daf05ec0 | 276 | /* Remove action bits from state */ |
1da177e4 | 277 | #define NS_STATE(x) ((x) & ~ACTION_MASK) |
61b03bd7 TG |
278 | |
279 | /* | |
1da177e4 | 280 | * Maximum previous states which need to be saved. Currently saving is |
daf05ec0 | 281 | * only needed for page program operation with preceded read command |
1da177e4 LT |
282 | * (which is only valid for 512-byte pages). |
283 | */ | |
284 | #define NS_MAX_PREVSTATES 1 | |
285 | ||
a9fc8991 AH |
286 | /* Maximum page cache pages needed to read or write a NAND page to the cache_file */ |
287 | #define NS_MAX_HELD_PAGES 16 | |
288 | ||
d086d436 VK |
289 | /* |
290 | * A union to represent flash memory contents and flash buffer. | |
291 | */ | |
292 | union ns_mem { | |
293 | u_char *byte; /* for byte access */ | |
294 | uint16_t *word; /* for 16-bit word access */ | |
295 | }; | |
296 | ||
61b03bd7 | 297 | /* |
1da177e4 LT |
298 | * The structure which describes all the internal simulator data. |
299 | */ | |
300 | struct nandsim { | |
74aee14c | 301 | struct nand_chip chip; |
1c14fe21 | 302 | struct nand_controller base; |
e99e90ae | 303 | struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS]; |
2b77a0ed | 304 | unsigned int nbparts; |
1da177e4 LT |
305 | |
306 | uint busw; /* flash chip bus width (8 or 16) */ | |
b00358a5 | 307 | u_char ids[8]; /* chip's ID bytes */ |
1da177e4 LT |
308 | uint32_t options; /* chip's characteristic bits */ |
309 | uint32_t state; /* current chip state */ | |
310 | uint32_t nxstate; /* next expected state */ | |
61b03bd7 | 311 | |
1da177e4 LT |
312 | uint32_t *op; /* current operation, NULL operations isn't known yet */ |
313 | uint32_t pstates[NS_MAX_PREVSTATES]; /* previous states */ | |
314 | uint16_t npstates; /* number of previous states saved */ | |
315 | uint16_t stateidx; /* current state index */ | |
316 | ||
d086d436 VK |
317 | /* The simulated NAND flash pages array */ |
318 | union ns_mem *pages; | |
1da177e4 | 319 | |
8a4c2495 AK |
320 | /* Slab allocator for nand pages */ |
321 | struct kmem_cache *nand_pages_slab; | |
322 | ||
1da177e4 | 323 | /* Internal buffer of page + OOB size bytes */ |
d086d436 | 324 | union ns_mem buf; |
1da177e4 LT |
325 | |
326 | /* NAND flash "geometry" */ | |
0bfa4df2 | 327 | struct { |
6eda7a55 | 328 | uint64_t totsz; /* total flash size, bytes */ |
1da177e4 LT |
329 | uint32_t secsz; /* flash sector (erase block) size, bytes */ |
330 | uint pgsz; /* NAND flash page size, bytes */ | |
331 | uint oobsz; /* page OOB area size, bytes */ | |
6eda7a55 | 332 | uint64_t totszoob; /* total flash size including OOB, bytes */ |
1da177e4 LT |
333 | uint pgszoob; /* page size including OOB , bytes*/ |
334 | uint secszoob; /* sector size including OOB, bytes */ | |
335 | uint pgnum; /* total number of pages */ | |
336 | uint pgsec; /* number of pages per sector */ | |
337 | uint secshift; /* bits number in sector size */ | |
338 | uint pgshift; /* bits number in page size */ | |
1da177e4 LT |
339 | uint pgaddrbytes; /* bytes per page address */ |
340 | uint secaddrbytes; /* bytes per sector address */ | |
341 | uint idbytes; /* the number ID bytes that this chip outputs */ | |
342 | } geom; | |
343 | ||
344 | /* NAND flash internal registers */ | |
0bfa4df2 | 345 | struct { |
1da177e4 LT |
346 | unsigned command; /* the command register */ |
347 | u_char status; /* the status register */ | |
348 | uint row; /* the page number */ | |
349 | uint column; /* the offset within page */ | |
350 | uint count; /* internal counter */ | |
351 | uint num; /* number of bytes which must be processed */ | |
352 | uint off; /* fixed page offset */ | |
353 | } regs; | |
354 | ||
355 | /* NAND flash lines state */ | |
0bfa4df2 | 356 | struct { |
1da177e4 LT |
357 | int ce; /* chip Enable */ |
358 | int cle; /* command Latch Enable */ | |
359 | int ale; /* address Latch Enable */ | |
360 | int wp; /* write Protect */ | |
361 | } lines; | |
a9fc8991 AH |
362 | |
363 | /* Fields needed when using a cache file */ | |
364 | struct file *cfile; /* Open file */ | |
08efe91a | 365 | unsigned long *pages_written; /* Which pages have been written */ |
a9fc8991 AH |
366 | void *file_buf; |
367 | struct page *held_pages[NS_MAX_HELD_PAGES]; | |
368 | int held_cnt; | |
1da177e4 LT |
369 | }; |
370 | ||
371 | /* | |
372 | * Operations array. To perform any operation the simulator must pass | |
373 | * through the correspondent states chain. | |
374 | */ | |
375 | static struct nandsim_operations { | |
376 | uint32_t reqopts; /* options which are required to perform the operation */ | |
377 | uint32_t states[NS_OPER_STATES]; /* operation's states */ | |
378 | } ops[NS_OPER_NUM] = { | |
379 | /* Read page + OOB from the beginning */ | |
380 | {OPT_SMALLPAGE, {STATE_CMD_READ0 | ACTION_ZEROOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
381 | STATE_DATAOUT, STATE_READY}}, | |
382 | /* Read page + OOB from the second half */ | |
383 | {OPT_PAGE512_8BIT, {STATE_CMD_READ1 | ACTION_HALFOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
384 | STATE_DATAOUT, STATE_READY}}, | |
385 | /* Read OOB */ | |
386 | {OPT_SMALLPAGE, {STATE_CMD_READOOB | ACTION_OOBOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
387 | STATE_DATAOUT, STATE_READY}}, | |
daf05ec0 | 388 | /* Program page starting from the beginning */ |
1da177e4 LT |
389 | {OPT_ANY, {STATE_CMD_SEQIN, STATE_ADDR_PAGE, STATE_DATAIN, |
390 | STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 391 | /* Program page starting from the beginning */ |
1da177e4 LT |
392 | {OPT_SMALLPAGE, {STATE_CMD_READ0, STATE_CMD_SEQIN | ACTION_ZEROOFF, STATE_ADDR_PAGE, |
393 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 394 | /* Program page starting from the second half */ |
1da177e4 LT |
395 | {OPT_PAGE512, {STATE_CMD_READ1, STATE_CMD_SEQIN | ACTION_HALFOFF, STATE_ADDR_PAGE, |
396 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 397 | /* Program OOB */ |
1da177e4 LT |
398 | {OPT_SMALLPAGE, {STATE_CMD_READOOB, STATE_CMD_SEQIN | ACTION_OOBOFF, STATE_ADDR_PAGE, |
399 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
400 | /* Erase sector */ | |
401 | {OPT_ANY, {STATE_CMD_ERASE1, STATE_ADDR_SEC, STATE_CMD_ERASE2 | ACTION_SECERASE, STATE_READY}}, | |
402 | /* Read status */ | |
403 | {OPT_ANY, {STATE_CMD_STATUS, STATE_DATAOUT_STATUS, STATE_READY}}, | |
1da177e4 LT |
404 | /* Read ID */ |
405 | {OPT_ANY, {STATE_CMD_READID, STATE_ADDR_ZERO, STATE_DATAOUT_ID, STATE_READY}}, | |
406 | /* Large page devices read page */ | |
407 | {OPT_LARGEPAGE, {STATE_CMD_READ0, STATE_ADDR_PAGE, STATE_CMD_READSTART | ACTION_CPY, | |
74216be4 AB |
408 | STATE_DATAOUT, STATE_READY}}, |
409 | /* Large page devices random page read */ | |
410 | {OPT_LARGEPAGE, {STATE_CMD_RNDOUT, STATE_ADDR_COLUMN, STATE_CMD_RNDOUTSTART | ACTION_CPY, | |
411 | STATE_DATAOUT, STATE_READY}}, | |
1da177e4 LT |
412 | }; |
413 | ||
514087e7 AH |
414 | struct weak_block { |
415 | struct list_head list; | |
416 | unsigned int erase_block_no; | |
417 | unsigned int max_erases; | |
418 | unsigned int erases_done; | |
419 | }; | |
420 | ||
421 | static LIST_HEAD(weak_blocks); | |
422 | ||
423 | struct weak_page { | |
424 | struct list_head list; | |
425 | unsigned int page_no; | |
426 | unsigned int max_writes; | |
427 | unsigned int writes_done; | |
428 | }; | |
429 | ||
430 | static LIST_HEAD(weak_pages); | |
431 | ||
432 | struct grave_page { | |
433 | struct list_head list; | |
434 | unsigned int page_no; | |
435 | unsigned int max_reads; | |
436 | unsigned int reads_done; | |
437 | }; | |
438 | ||
439 | static LIST_HEAD(grave_pages); | |
440 | ||
57aa6b54 AH |
441 | static unsigned long *erase_block_wear = NULL; |
442 | static unsigned int wear_eb_count = 0; | |
443 | static unsigned long total_wear = 0; | |
57aa6b54 | 444 | |
1da177e4 LT |
445 | /* MTD structure for NAND controller */ |
446 | static struct mtd_info *nsmtd; | |
447 | ||
c78f59d7 | 448 | static int nandsim_show(struct seq_file *m, void *private) |
5346c27c EG |
449 | { |
450 | unsigned long wmin = -1, wmax = 0, avg; | |
451 | unsigned long deciles[10], decile_max[10], tot = 0; | |
452 | unsigned int i; | |
453 | ||
454 | /* Calc wear stats */ | |
455 | for (i = 0; i < wear_eb_count; ++i) { | |
456 | unsigned long wear = erase_block_wear[i]; | |
457 | if (wear < wmin) | |
458 | wmin = wear; | |
459 | if (wear > wmax) | |
460 | wmax = wear; | |
461 | tot += wear; | |
462 | } | |
463 | ||
464 | for (i = 0; i < 9; ++i) { | |
465 | deciles[i] = 0; | |
466 | decile_max[i] = (wmax * (i + 1) + 5) / 10; | |
467 | } | |
468 | deciles[9] = 0; | |
469 | decile_max[9] = wmax; | |
470 | for (i = 0; i < wear_eb_count; ++i) { | |
471 | int d; | |
472 | unsigned long wear = erase_block_wear[i]; | |
473 | for (d = 0; d < 10; ++d) | |
474 | if (wear <= decile_max[d]) { | |
475 | deciles[d] += 1; | |
476 | break; | |
477 | } | |
478 | } | |
479 | avg = tot / wear_eb_count; | |
480 | ||
481 | /* Output wear report */ | |
482 | seq_printf(m, "Total numbers of erases: %lu\n", tot); | |
483 | seq_printf(m, "Number of erase blocks: %u\n", wear_eb_count); | |
484 | seq_printf(m, "Average number of erases: %lu\n", avg); | |
485 | seq_printf(m, "Maximum number of erases: %lu\n", wmax); | |
486 | seq_printf(m, "Minimum number of erases: %lu\n", wmin); | |
487 | for (i = 0; i < 10; ++i) { | |
488 | unsigned long from = (i ? decile_max[i - 1] + 1 : 0); | |
489 | if (from > decile_max[i]) | |
490 | continue; | |
491 | seq_printf(m, "Number of ebs with erase counts from %lu to %lu : %lu\n", | |
492 | from, | |
493 | decile_max[i], | |
494 | deciles[i]); | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
c78f59d7 | 499 | DEFINE_SHOW_ATTRIBUTE(nandsim); |
5346c27c EG |
500 | |
501 | /** | |
502 | * nandsim_debugfs_create - initialize debugfs | |
503 | * @dev: nandsim device description object | |
504 | * | |
505 | * This function creates all debugfs files for UBI device @ubi. Returns zero in | |
506 | * case of success and a negative error code in case of failure. | |
507 | */ | |
508 | static int nandsim_debugfs_create(struct nandsim *dev) | |
509 | { | |
e8e3edb9 | 510 | struct dentry *root = nsmtd->dbg.dfs_dir; |
5346c27c | 511 | struct dentry *dent; |
5346c27c | 512 | |
1530578a BB |
513 | /* |
514 | * Just skip debugfs initialization when the debugfs directory is | |
515 | * missing. | |
516 | */ | |
517 | if (IS_ERR_OR_NULL(root)) { | |
518 | if (IS_ENABLED(CONFIG_DEBUG_FS) && | |
519 | !IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER)) | |
520 | NS_WARN("CONFIG_MTD_PARTITIONED_MASTER must be enabled to expose debugfs stuff\n"); | |
5346c27c | 521 | return 0; |
1530578a | 522 | } |
5346c27c | 523 | |
e8e3edb9 | 524 | dent = debugfs_create_file("nandsim_wear_report", S_IRUSR, |
c78f59d7 | 525 | root, dev, &nandsim_fops); |
e8e3edb9 MR |
526 | if (IS_ERR_OR_NULL(dent)) { |
527 | NS_ERR("cannot create \"nandsim_wear_report\" debugfs entry\n"); | |
528 | return -1; | |
529 | } | |
5346c27c EG |
530 | |
531 | return 0; | |
5346c27c EG |
532 | } |
533 | ||
d086d436 | 534 | /* |
8a4c2495 AK |
535 | * Allocate array of page pointers, create slab allocation for an array |
536 | * and initialize the array by NULL pointers. | |
d086d436 VK |
537 | * |
538 | * RETURNS: 0 if success, -ENOMEM if memory alloc fails. | |
539 | */ | |
77784785 | 540 | static int __init alloc_device(struct nandsim *ns) |
d086d436 | 541 | { |
a9fc8991 AH |
542 | struct file *cfile; |
543 | int i, err; | |
544 | ||
545 | if (cache_file) { | |
546 | cfile = filp_open(cache_file, O_CREAT | O_RDWR | O_LARGEFILE, 0600); | |
547 | if (IS_ERR(cfile)) | |
548 | return PTR_ERR(cfile); | |
7f7f25e8 | 549 | if (!(cfile->f_mode & FMODE_CAN_READ)) { |
a9fc8991 AH |
550 | NS_ERR("alloc_device: cache file not readable\n"); |
551 | err = -EINVAL; | |
552 | goto err_close; | |
553 | } | |
7f7f25e8 | 554 | if (!(cfile->f_mode & FMODE_CAN_WRITE)) { |
a9fc8991 AH |
555 | NS_ERR("alloc_device: cache file not writeable\n"); |
556 | err = -EINVAL; | |
557 | goto err_close; | |
558 | } | |
fad953ce KC |
559 | ns->pages_written = |
560 | vzalloc(array_size(sizeof(unsigned long), | |
561 | BITS_TO_LONGS(ns->geom.pgnum))); | |
a9fc8991 AH |
562 | if (!ns->pages_written) { |
563 | NS_ERR("alloc_device: unable to allocate pages written array\n"); | |
564 | err = -ENOMEM; | |
565 | goto err_close; | |
566 | } | |
567 | ns->file_buf = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
568 | if (!ns->file_buf) { | |
569 | NS_ERR("alloc_device: unable to allocate file buf\n"); | |
570 | err = -ENOMEM; | |
571 | goto err_free; | |
572 | } | |
573 | ns->cfile = cfile; | |
a9fc8991 AH |
574 | return 0; |
575 | } | |
d086d436 | 576 | |
42bc47b3 | 577 | ns->pages = vmalloc(array_size(sizeof(union ns_mem), ns->geom.pgnum)); |
d086d436 | 578 | if (!ns->pages) { |
a9fc8991 | 579 | NS_ERR("alloc_device: unable to allocate page array\n"); |
d086d436 VK |
580 | return -ENOMEM; |
581 | } | |
582 | for (i = 0; i < ns->geom.pgnum; i++) { | |
583 | ns->pages[i].byte = NULL; | |
584 | } | |
8a4c2495 AK |
585 | ns->nand_pages_slab = kmem_cache_create("nandsim", |
586 | ns->geom.pgszoob, 0, 0, NULL); | |
587 | if (!ns->nand_pages_slab) { | |
588 | NS_ERR("cache_create: unable to create kmem_cache\n"); | |
589 | return -ENOMEM; | |
590 | } | |
d086d436 VK |
591 | |
592 | return 0; | |
a9fc8991 AH |
593 | |
594 | err_free: | |
595 | vfree(ns->pages_written); | |
596 | err_close: | |
597 | filp_close(cfile, NULL); | |
598 | return err; | |
d086d436 VK |
599 | } |
600 | ||
601 | /* | |
602 | * Free any allocated pages, and free the array of page pointers. | |
603 | */ | |
a5602146 | 604 | static void free_device(struct nandsim *ns) |
d086d436 VK |
605 | { |
606 | int i; | |
607 | ||
a9fc8991 AH |
608 | if (ns->cfile) { |
609 | kfree(ns->file_buf); | |
610 | vfree(ns->pages_written); | |
611 | filp_close(ns->cfile, NULL); | |
612 | return; | |
613 | } | |
614 | ||
d086d436 VK |
615 | if (ns->pages) { |
616 | for (i = 0; i < ns->geom.pgnum; i++) { | |
617 | if (ns->pages[i].byte) | |
8a4c2495 AK |
618 | kmem_cache_free(ns->nand_pages_slab, |
619 | ns->pages[i].byte); | |
d086d436 | 620 | } |
0791a5f8 | 621 | kmem_cache_destroy(ns->nand_pages_slab); |
d086d436 VK |
622 | vfree(ns->pages); |
623 | } | |
624 | } | |
625 | ||
77784785 | 626 | static char __init *get_partition_name(int i) |
2b77a0ed | 627 | { |
f03a5729 | 628 | return kasprintf(GFP_KERNEL, "NAND simulator partition %d", i); |
2b77a0ed AH |
629 | } |
630 | ||
1da177e4 LT |
631 | /* |
632 | * Initialize the nandsim structure. | |
633 | * | |
634 | * RETURNS: 0 if success, -ERRNO if failure. | |
635 | */ | |
77784785 | 636 | static int __init init_nandsim(struct mtd_info *mtd) |
1da177e4 | 637 | { |
862eba51 | 638 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 639 | struct nandsim *ns = nand_get_controller_data(chip); |
2b77a0ed | 640 | int i, ret = 0; |
0f07a0be DW |
641 | uint64_t remains; |
642 | uint64_t next_offset; | |
1da177e4 LT |
643 | |
644 | if (NS_IS_INITIALIZED(ns)) { | |
645 | NS_ERR("init_nandsim: nandsim is already initialized\n"); | |
646 | return -EIO; | |
647 | } | |
648 | ||
1da177e4 LT |
649 | /* Initialize the NAND flash parameters */ |
650 | ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8; | |
651 | ns->geom.totsz = mtd->size; | |
28318776 | 652 | ns->geom.pgsz = mtd->writesize; |
1da177e4 LT |
653 | ns->geom.oobsz = mtd->oobsize; |
654 | ns->geom.secsz = mtd->erasesize; | |
655 | ns->geom.pgszoob = ns->geom.pgsz + ns->geom.oobsz; | |
596fd462 | 656 | ns->geom.pgnum = div_u64(ns->geom.totsz, ns->geom.pgsz); |
6eda7a55 | 657 | ns->geom.totszoob = ns->geom.totsz + (uint64_t)ns->geom.pgnum * ns->geom.oobsz; |
1da177e4 LT |
658 | ns->geom.secshift = ffs(ns->geom.secsz) - 1; |
659 | ns->geom.pgshift = chip->page_shift; | |
1da177e4 LT |
660 | ns->geom.pgsec = ns->geom.secsz / ns->geom.pgsz; |
661 | ns->geom.secszoob = ns->geom.secsz + ns->geom.oobsz * ns->geom.pgsec; | |
662 | ns->options = 0; | |
663 | ||
51148f1f | 664 | if (ns->geom.pgsz == 512) { |
831d316b | 665 | ns->options |= OPT_PAGE512; |
1da177e4 LT |
666 | if (ns->busw == 8) |
667 | ns->options |= OPT_PAGE512_8BIT; | |
668 | } else if (ns->geom.pgsz == 2048) { | |
669 | ns->options |= OPT_PAGE2048; | |
75352662 SAS |
670 | } else if (ns->geom.pgsz == 4096) { |
671 | ns->options |= OPT_PAGE4096; | |
1da177e4 LT |
672 | } else { |
673 | NS_ERR("init_nandsim: unknown page size %u\n", ns->geom.pgsz); | |
674 | return -EIO; | |
675 | } | |
676 | ||
677 | if (ns->options & OPT_SMALLPAGE) { | |
af3deccf | 678 | if (ns->geom.totsz <= (32 << 20)) { |
1da177e4 LT |
679 | ns->geom.pgaddrbytes = 3; |
680 | ns->geom.secaddrbytes = 2; | |
681 | } else { | |
682 | ns->geom.pgaddrbytes = 4; | |
683 | ns->geom.secaddrbytes = 3; | |
684 | } | |
685 | } else { | |
686 | if (ns->geom.totsz <= (128 << 20)) { | |
4a0c50c0 | 687 | ns->geom.pgaddrbytes = 4; |
1da177e4 LT |
688 | ns->geom.secaddrbytes = 2; |
689 | } else { | |
690 | ns->geom.pgaddrbytes = 5; | |
691 | ns->geom.secaddrbytes = 3; | |
692 | } | |
693 | } | |
61b03bd7 | 694 | |
2b77a0ed AH |
695 | /* Fill the partition_info structure */ |
696 | if (parts_num > ARRAY_SIZE(ns->partitions)) { | |
697 | NS_ERR("too many partitions.\n"); | |
5891a8d1 | 698 | return -EINVAL; |
2b77a0ed AH |
699 | } |
700 | remains = ns->geom.totsz; | |
701 | next_offset = 0; | |
702 | for (i = 0; i < parts_num; ++i) { | |
0f07a0be | 703 | uint64_t part_sz = (uint64_t)parts[i] * ns->geom.secsz; |
6eda7a55 AH |
704 | |
705 | if (!part_sz || part_sz > remains) { | |
2b77a0ed | 706 | NS_ERR("bad partition size.\n"); |
5891a8d1 | 707 | return -EINVAL; |
2b77a0ed AH |
708 | } |
709 | ns->partitions[i].name = get_partition_name(i); | |
641c7925 RW |
710 | if (!ns->partitions[i].name) { |
711 | NS_ERR("unable to allocate memory.\n"); | |
5891a8d1 | 712 | return -ENOMEM; |
641c7925 | 713 | } |
2b77a0ed | 714 | ns->partitions[i].offset = next_offset; |
6eda7a55 | 715 | ns->partitions[i].size = part_sz; |
2b77a0ed AH |
716 | next_offset += ns->partitions[i].size; |
717 | remains -= ns->partitions[i].size; | |
718 | } | |
719 | ns->nbparts = parts_num; | |
720 | if (remains) { | |
721 | if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) { | |
722 | NS_ERR("too many partitions.\n"); | |
5891a8d1 | 723 | return -EINVAL; |
2b77a0ed AH |
724 | } |
725 | ns->partitions[i].name = get_partition_name(i); | |
641c7925 RW |
726 | if (!ns->partitions[i].name) { |
727 | NS_ERR("unable to allocate memory.\n"); | |
5891a8d1 | 728 | return -ENOMEM; |
641c7925 | 729 | } |
2b77a0ed AH |
730 | ns->partitions[i].offset = next_offset; |
731 | ns->partitions[i].size = remains; | |
732 | ns->nbparts += 1; | |
733 | } | |
734 | ||
1da177e4 LT |
735 | if (ns->busw == 16) |
736 | NS_WARN("16-bit flashes support wasn't tested\n"); | |
737 | ||
e4c094a5 AM |
738 | printk("flash size: %llu MiB\n", |
739 | (unsigned long long)ns->geom.totsz >> 20); | |
1da177e4 LT |
740 | printk("page size: %u bytes\n", ns->geom.pgsz); |
741 | printk("OOB area size: %u bytes\n", ns->geom.oobsz); | |
742 | printk("sector size: %u KiB\n", ns->geom.secsz >> 10); | |
743 | printk("pages number: %u\n", ns->geom.pgnum); | |
744 | printk("pages per sector: %u\n", ns->geom.pgsec); | |
745 | printk("bus width: %u\n", ns->busw); | |
746 | printk("bits in sector size: %u\n", ns->geom.secshift); | |
747 | printk("bits in page size: %u\n", ns->geom.pgshift); | |
2f3b07a7 | 748 | printk("bits in OOB size: %u\n", ffs(ns->geom.oobsz) - 1); |
e4c094a5 AM |
749 | printk("flash size with OOB: %llu KiB\n", |
750 | (unsigned long long)ns->geom.totszoob >> 10); | |
1da177e4 LT |
751 | printk("page address bytes: %u\n", ns->geom.pgaddrbytes); |
752 | printk("sector address bytes: %u\n", ns->geom.secaddrbytes); | |
753 | printk("options: %#x\n", ns->options); | |
754 | ||
2b77a0ed | 755 | if ((ret = alloc_device(ns)) != 0) |
5891a8d1 | 756 | return ret; |
1da177e4 LT |
757 | |
758 | /* Allocate / initialize the internal buffer */ | |
759 | ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
760 | if (!ns->buf.byte) { | |
761 | NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n", | |
762 | ns->geom.pgszoob); | |
5891a8d1 | 763 | return -ENOMEM; |
1da177e4 LT |
764 | } |
765 | memset(ns->buf.byte, 0xFF, ns->geom.pgszoob); | |
766 | ||
1da177e4 | 767 | return 0; |
1da177e4 LT |
768 | } |
769 | ||
770 | /* | |
771 | * Free the nandsim structure. | |
772 | */ | |
a5602146 | 773 | static void free_nandsim(struct nandsim *ns) |
1da177e4 LT |
774 | { |
775 | kfree(ns->buf.byte); | |
d086d436 | 776 | free_device(ns); |
1da177e4 LT |
777 | |
778 | return; | |
779 | } | |
780 | ||
514087e7 AH |
781 | static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) |
782 | { | |
783 | char *w; | |
784 | int zero_ok; | |
785 | unsigned int erase_block_no; | |
786 | loff_t offset; | |
787 | ||
788 | if (!badblocks) | |
789 | return 0; | |
790 | w = badblocks; | |
791 | do { | |
792 | zero_ok = (*w == '0' ? 1 : 0); | |
793 | erase_block_no = simple_strtoul(w, &w, 0); | |
794 | if (!zero_ok && !erase_block_no) { | |
795 | NS_ERR("invalid badblocks.\n"); | |
796 | return -EINVAL; | |
797 | } | |
b033e1aa | 798 | offset = (loff_t)erase_block_no * ns->geom.secsz; |
5942ddbc | 799 | if (mtd_block_markbad(mtd, offset)) { |
514087e7 AH |
800 | NS_ERR("invalid badblocks.\n"); |
801 | return -EINVAL; | |
802 | } | |
803 | if (*w == ',') | |
804 | w += 1; | |
805 | } while (*w); | |
806 | return 0; | |
807 | } | |
808 | ||
809 | static int parse_weakblocks(void) | |
810 | { | |
811 | char *w; | |
812 | int zero_ok; | |
813 | unsigned int erase_block_no; | |
814 | unsigned int max_erases; | |
815 | struct weak_block *wb; | |
816 | ||
817 | if (!weakblocks) | |
818 | return 0; | |
819 | w = weakblocks; | |
820 | do { | |
821 | zero_ok = (*w == '0' ? 1 : 0); | |
822 | erase_block_no = simple_strtoul(w, &w, 0); | |
823 | if (!zero_ok && !erase_block_no) { | |
824 | NS_ERR("invalid weakblocks.\n"); | |
825 | return -EINVAL; | |
826 | } | |
827 | max_erases = 3; | |
828 | if (*w == ':') { | |
829 | w += 1; | |
830 | max_erases = simple_strtoul(w, &w, 0); | |
831 | } | |
832 | if (*w == ',') | |
833 | w += 1; | |
834 | wb = kzalloc(sizeof(*wb), GFP_KERNEL); | |
835 | if (!wb) { | |
836 | NS_ERR("unable to allocate memory.\n"); | |
837 | return -ENOMEM; | |
838 | } | |
839 | wb->erase_block_no = erase_block_no; | |
840 | wb->max_erases = max_erases; | |
841 | list_add(&wb->list, &weak_blocks); | |
842 | } while (*w); | |
843 | return 0; | |
844 | } | |
845 | ||
846 | static int erase_error(unsigned int erase_block_no) | |
847 | { | |
848 | struct weak_block *wb; | |
849 | ||
850 | list_for_each_entry(wb, &weak_blocks, list) | |
851 | if (wb->erase_block_no == erase_block_no) { | |
852 | if (wb->erases_done >= wb->max_erases) | |
853 | return 1; | |
854 | wb->erases_done += 1; | |
855 | return 0; | |
856 | } | |
857 | return 0; | |
858 | } | |
859 | ||
860 | static int parse_weakpages(void) | |
861 | { | |
862 | char *w; | |
863 | int zero_ok; | |
864 | unsigned int page_no; | |
865 | unsigned int max_writes; | |
866 | struct weak_page *wp; | |
867 | ||
868 | if (!weakpages) | |
869 | return 0; | |
870 | w = weakpages; | |
871 | do { | |
872 | zero_ok = (*w == '0' ? 1 : 0); | |
873 | page_no = simple_strtoul(w, &w, 0); | |
874 | if (!zero_ok && !page_no) { | |
215157fb | 875 | NS_ERR("invalid weakpages.\n"); |
514087e7 AH |
876 | return -EINVAL; |
877 | } | |
878 | max_writes = 3; | |
879 | if (*w == ':') { | |
880 | w += 1; | |
881 | max_writes = simple_strtoul(w, &w, 0); | |
882 | } | |
883 | if (*w == ',') | |
884 | w += 1; | |
885 | wp = kzalloc(sizeof(*wp), GFP_KERNEL); | |
886 | if (!wp) { | |
887 | NS_ERR("unable to allocate memory.\n"); | |
888 | return -ENOMEM; | |
889 | } | |
890 | wp->page_no = page_no; | |
891 | wp->max_writes = max_writes; | |
892 | list_add(&wp->list, &weak_pages); | |
893 | } while (*w); | |
894 | return 0; | |
895 | } | |
896 | ||
897 | static int write_error(unsigned int page_no) | |
898 | { | |
899 | struct weak_page *wp; | |
900 | ||
901 | list_for_each_entry(wp, &weak_pages, list) | |
902 | if (wp->page_no == page_no) { | |
903 | if (wp->writes_done >= wp->max_writes) | |
904 | return 1; | |
905 | wp->writes_done += 1; | |
906 | return 0; | |
907 | } | |
908 | return 0; | |
909 | } | |
910 | ||
911 | static int parse_gravepages(void) | |
912 | { | |
913 | char *g; | |
914 | int zero_ok; | |
915 | unsigned int page_no; | |
916 | unsigned int max_reads; | |
917 | struct grave_page *gp; | |
918 | ||
919 | if (!gravepages) | |
920 | return 0; | |
921 | g = gravepages; | |
922 | do { | |
923 | zero_ok = (*g == '0' ? 1 : 0); | |
924 | page_no = simple_strtoul(g, &g, 0); | |
925 | if (!zero_ok && !page_no) { | |
926 | NS_ERR("invalid gravepagess.\n"); | |
927 | return -EINVAL; | |
928 | } | |
929 | max_reads = 3; | |
930 | if (*g == ':') { | |
931 | g += 1; | |
932 | max_reads = simple_strtoul(g, &g, 0); | |
933 | } | |
934 | if (*g == ',') | |
935 | g += 1; | |
936 | gp = kzalloc(sizeof(*gp), GFP_KERNEL); | |
937 | if (!gp) { | |
938 | NS_ERR("unable to allocate memory.\n"); | |
939 | return -ENOMEM; | |
940 | } | |
941 | gp->page_no = page_no; | |
942 | gp->max_reads = max_reads; | |
943 | list_add(&gp->list, &grave_pages); | |
944 | } while (*g); | |
945 | return 0; | |
946 | } | |
947 | ||
948 | static int read_error(unsigned int page_no) | |
949 | { | |
950 | struct grave_page *gp; | |
951 | ||
952 | list_for_each_entry(gp, &grave_pages, list) | |
953 | if (gp->page_no == page_no) { | |
954 | if (gp->reads_done >= gp->max_reads) | |
955 | return 1; | |
956 | gp->reads_done += 1; | |
957 | return 0; | |
958 | } | |
959 | return 0; | |
960 | } | |
961 | ||
962 | static void free_lists(void) | |
963 | { | |
964 | struct list_head *pos, *n; | |
965 | list_for_each_safe(pos, n, &weak_blocks) { | |
966 | list_del(pos); | |
967 | kfree(list_entry(pos, struct weak_block, list)); | |
968 | } | |
969 | list_for_each_safe(pos, n, &weak_pages) { | |
970 | list_del(pos); | |
971 | kfree(list_entry(pos, struct weak_page, list)); | |
972 | } | |
973 | list_for_each_safe(pos, n, &grave_pages) { | |
974 | list_del(pos); | |
975 | kfree(list_entry(pos, struct grave_page, list)); | |
976 | } | |
57aa6b54 AH |
977 | kfree(erase_block_wear); |
978 | } | |
979 | ||
980 | static int setup_wear_reporting(struct mtd_info *mtd) | |
981 | { | |
982 | size_t mem; | |
983 | ||
596fd462 | 984 | wear_eb_count = div_u64(mtd->size, mtd->erasesize); |
57aa6b54 AH |
985 | mem = wear_eb_count * sizeof(unsigned long); |
986 | if (mem / sizeof(unsigned long) != wear_eb_count) { | |
987 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
988 | return -ENOMEM; | |
989 | } | |
990 | erase_block_wear = kzalloc(mem, GFP_KERNEL); | |
991 | if (!erase_block_wear) { | |
992 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
993 | return -ENOMEM; | |
994 | } | |
995 | return 0; | |
996 | } | |
997 | ||
998 | static void update_wear(unsigned int erase_block_no) | |
999 | { | |
57aa6b54 AH |
1000 | if (!erase_block_wear) |
1001 | return; | |
1002 | total_wear += 1; | |
5346c27c EG |
1003 | /* |
1004 | * TODO: Notify this through a debugfs entry, | |
1005 | * instead of showing an error message. | |
1006 | */ | |
57aa6b54 AH |
1007 | if (total_wear == 0) |
1008 | NS_ERR("Erase counter total overflow\n"); | |
1009 | erase_block_wear[erase_block_no] += 1; | |
1010 | if (erase_block_wear[erase_block_no] == 0) | |
1011 | NS_ERR("Erase counter overflow for erase block %u\n", erase_block_no); | |
514087e7 AH |
1012 | } |
1013 | ||
1da177e4 LT |
1014 | /* |
1015 | * Returns the string representation of 'state' state. | |
1016 | */ | |
a5602146 | 1017 | static char *get_state_name(uint32_t state) |
1da177e4 LT |
1018 | { |
1019 | switch (NS_STATE(state)) { | |
1020 | case STATE_CMD_READ0: | |
1021 | return "STATE_CMD_READ0"; | |
1022 | case STATE_CMD_READ1: | |
1023 | return "STATE_CMD_READ1"; | |
1024 | case STATE_CMD_PAGEPROG: | |
1025 | return "STATE_CMD_PAGEPROG"; | |
1026 | case STATE_CMD_READOOB: | |
1027 | return "STATE_CMD_READOOB"; | |
1028 | case STATE_CMD_READSTART: | |
1029 | return "STATE_CMD_READSTART"; | |
1030 | case STATE_CMD_ERASE1: | |
1031 | return "STATE_CMD_ERASE1"; | |
1032 | case STATE_CMD_STATUS: | |
1033 | return "STATE_CMD_STATUS"; | |
1da177e4 LT |
1034 | case STATE_CMD_SEQIN: |
1035 | return "STATE_CMD_SEQIN"; | |
1036 | case STATE_CMD_READID: | |
1037 | return "STATE_CMD_READID"; | |
1038 | case STATE_CMD_ERASE2: | |
1039 | return "STATE_CMD_ERASE2"; | |
1040 | case STATE_CMD_RESET: | |
1041 | return "STATE_CMD_RESET"; | |
74216be4 AB |
1042 | case STATE_CMD_RNDOUT: |
1043 | return "STATE_CMD_RNDOUT"; | |
1044 | case STATE_CMD_RNDOUTSTART: | |
1045 | return "STATE_CMD_RNDOUTSTART"; | |
1da177e4 LT |
1046 | case STATE_ADDR_PAGE: |
1047 | return "STATE_ADDR_PAGE"; | |
1048 | case STATE_ADDR_SEC: | |
1049 | return "STATE_ADDR_SEC"; | |
1050 | case STATE_ADDR_ZERO: | |
1051 | return "STATE_ADDR_ZERO"; | |
74216be4 AB |
1052 | case STATE_ADDR_COLUMN: |
1053 | return "STATE_ADDR_COLUMN"; | |
1da177e4 LT |
1054 | case STATE_DATAIN: |
1055 | return "STATE_DATAIN"; | |
1056 | case STATE_DATAOUT: | |
1057 | return "STATE_DATAOUT"; | |
1058 | case STATE_DATAOUT_ID: | |
1059 | return "STATE_DATAOUT_ID"; | |
1060 | case STATE_DATAOUT_STATUS: | |
1061 | return "STATE_DATAOUT_STATUS"; | |
1da177e4 LT |
1062 | case STATE_READY: |
1063 | return "STATE_READY"; | |
1064 | case STATE_UNKNOWN: | |
1065 | return "STATE_UNKNOWN"; | |
1066 | } | |
1067 | ||
1068 | NS_ERR("get_state_name: unknown state, BUG\n"); | |
1069 | return NULL; | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Check if command is valid. | |
1074 | * | |
1075 | * RETURNS: 1 if wrong command, 0 if right. | |
1076 | */ | |
a5602146 | 1077 | static int check_command(int cmd) |
1da177e4 LT |
1078 | { |
1079 | switch (cmd) { | |
61b03bd7 | 1080 | |
1da177e4 | 1081 | case NAND_CMD_READ0: |
74216be4 | 1082 | case NAND_CMD_READ1: |
1da177e4 LT |
1083 | case NAND_CMD_READSTART: |
1084 | case NAND_CMD_PAGEPROG: | |
1085 | case NAND_CMD_READOOB: | |
1086 | case NAND_CMD_ERASE1: | |
1087 | case NAND_CMD_STATUS: | |
1088 | case NAND_CMD_SEQIN: | |
1089 | case NAND_CMD_READID: | |
1090 | case NAND_CMD_ERASE2: | |
1091 | case NAND_CMD_RESET: | |
74216be4 AB |
1092 | case NAND_CMD_RNDOUT: |
1093 | case NAND_CMD_RNDOUTSTART: | |
1da177e4 | 1094 | return 0; |
61b03bd7 | 1095 | |
1da177e4 LT |
1096 | default: |
1097 | return 1; | |
1098 | } | |
1099 | } | |
1100 | ||
1101 | /* | |
1102 | * Returns state after command is accepted by command number. | |
1103 | */ | |
a5602146 | 1104 | static uint32_t get_state_by_command(unsigned command) |
1da177e4 LT |
1105 | { |
1106 | switch (command) { | |
1107 | case NAND_CMD_READ0: | |
1108 | return STATE_CMD_READ0; | |
1109 | case NAND_CMD_READ1: | |
1110 | return STATE_CMD_READ1; | |
1111 | case NAND_CMD_PAGEPROG: | |
1112 | return STATE_CMD_PAGEPROG; | |
1113 | case NAND_CMD_READSTART: | |
1114 | return STATE_CMD_READSTART; | |
1115 | case NAND_CMD_READOOB: | |
1116 | return STATE_CMD_READOOB; | |
1117 | case NAND_CMD_ERASE1: | |
1118 | return STATE_CMD_ERASE1; | |
1119 | case NAND_CMD_STATUS: | |
1120 | return STATE_CMD_STATUS; | |
1da177e4 LT |
1121 | case NAND_CMD_SEQIN: |
1122 | return STATE_CMD_SEQIN; | |
1123 | case NAND_CMD_READID: | |
1124 | return STATE_CMD_READID; | |
1125 | case NAND_CMD_ERASE2: | |
1126 | return STATE_CMD_ERASE2; | |
1127 | case NAND_CMD_RESET: | |
1128 | return STATE_CMD_RESET; | |
74216be4 AB |
1129 | case NAND_CMD_RNDOUT: |
1130 | return STATE_CMD_RNDOUT; | |
1131 | case NAND_CMD_RNDOUTSTART: | |
1132 | return STATE_CMD_RNDOUTSTART; | |
1da177e4 LT |
1133 | } |
1134 | ||
1135 | NS_ERR("get_state_by_command: unknown command, BUG\n"); | |
1136 | return 0; | |
1137 | } | |
1138 | ||
1139 | /* | |
1140 | * Move an address byte to the correspondent internal register. | |
1141 | */ | |
a5602146 | 1142 | static inline void accept_addr_byte(struct nandsim *ns, u_char bt) |
1da177e4 LT |
1143 | { |
1144 | uint byte = (uint)bt; | |
61b03bd7 | 1145 | |
1da177e4 LT |
1146 | if (ns->regs.count < (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) |
1147 | ns->regs.column |= (byte << 8 * ns->regs.count); | |
1148 | else { | |
1149 | ns->regs.row |= (byte << 8 * (ns->regs.count - | |
1150 | ns->geom.pgaddrbytes + | |
1151 | ns->geom.secaddrbytes)); | |
1152 | } | |
1153 | ||
1154 | return; | |
1155 | } | |
61b03bd7 | 1156 | |
1da177e4 LT |
1157 | /* |
1158 | * Switch to STATE_READY state. | |
1159 | */ | |
a5602146 | 1160 | static inline void switch_to_ready_state(struct nandsim *ns, u_char status) |
1da177e4 LT |
1161 | { |
1162 | NS_DBG("switch_to_ready_state: switch to %s state\n", get_state_name(STATE_READY)); | |
1163 | ||
1164 | ns->state = STATE_READY; | |
1165 | ns->nxstate = STATE_UNKNOWN; | |
1166 | ns->op = NULL; | |
1167 | ns->npstates = 0; | |
1168 | ns->stateidx = 0; | |
1169 | ns->regs.num = 0; | |
1170 | ns->regs.count = 0; | |
1171 | ns->regs.off = 0; | |
1172 | ns->regs.row = 0; | |
1173 | ns->regs.column = 0; | |
1174 | ns->regs.status = status; | |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | * If the operation isn't known yet, try to find it in the global array | |
1179 | * of supported operations. | |
1180 | * | |
1181 | * Operation can be unknown because of the following. | |
daf05ec0 | 1182 | * 1. New command was accepted and this is the first call to find the |
1da177e4 | 1183 | * correspondent states chain. In this case ns->npstates = 0; |
daf05ec0 | 1184 | * 2. There are several operations which begin with the same command(s) |
1da177e4 LT |
1185 | * (for example program from the second half and read from the |
1186 | * second half operations both begin with the READ1 command). In this | |
1187 | * case the ns->pstates[] array contains previous states. | |
61b03bd7 | 1188 | * |
1da177e4 LT |
1189 | * Thus, the function tries to find operation containing the following |
1190 | * states (if the 'flag' parameter is 0): | |
1191 | * ns->pstates[0], ... ns->pstates[ns->npstates], ns->state | |
1192 | * | |
1193 | * If (one and only one) matching operation is found, it is accepted ( | |
1194 | * ns->ops, ns->state, ns->nxstate are initialized, ns->npstate is | |
1195 | * zeroed). | |
61b03bd7 | 1196 | * |
daf05ec0 | 1197 | * If there are several matches, the current state is pushed to the |
1da177e4 LT |
1198 | * ns->pstates. |
1199 | * | |
1200 | * The operation can be unknown only while commands are input to the chip. | |
1201 | * As soon as address command is accepted, the operation must be known. | |
1202 | * In such situation the function is called with 'flag' != 0, and the | |
1203 | * operation is searched using the following pattern: | |
1204 | * ns->pstates[0], ... ns->pstates[ns->npstates], <address input> | |
61b03bd7 | 1205 | * |
daf05ec0 | 1206 | * It is supposed that this pattern must either match one operation or |
1da177e4 LT |
1207 | * none. There can't be ambiguity in that case. |
1208 | * | |
daf05ec0 | 1209 | * If no matches found, the function does the following: |
1da177e4 LT |
1210 | * 1. if there are saved states present, try to ignore them and search |
1211 | * again only using the last command. If nothing was found, switch | |
1212 | * to the STATE_READY state. | |
1213 | * 2. if there are no saved states, switch to the STATE_READY state. | |
1214 | * | |
1215 | * RETURNS: -2 - no matched operations found. | |
1216 | * -1 - several matches. | |
1217 | * 0 - operation is found. | |
1218 | */ | |
a5602146 | 1219 | static int find_operation(struct nandsim *ns, uint32_t flag) |
1da177e4 LT |
1220 | { |
1221 | int opsfound = 0; | |
1222 | int i, j, idx = 0; | |
61b03bd7 | 1223 | |
1da177e4 LT |
1224 | for (i = 0; i < NS_OPER_NUM; i++) { |
1225 | ||
1226 | int found = 1; | |
61b03bd7 | 1227 | |
1da177e4 LT |
1228 | if (!(ns->options & ops[i].reqopts)) |
1229 | /* Ignore operations we can't perform */ | |
1230 | continue; | |
61b03bd7 | 1231 | |
1da177e4 LT |
1232 | if (flag) { |
1233 | if (!(ops[i].states[ns->npstates] & STATE_ADDR_MASK)) | |
1234 | continue; | |
1235 | } else { | |
1236 | if (NS_STATE(ns->state) != NS_STATE(ops[i].states[ns->npstates])) | |
1237 | continue; | |
1238 | } | |
1239 | ||
61b03bd7 | 1240 | for (j = 0; j < ns->npstates; j++) |
1da177e4 LT |
1241 | if (NS_STATE(ops[i].states[j]) != NS_STATE(ns->pstates[j]) |
1242 | && (ns->options & ops[idx].reqopts)) { | |
1243 | found = 0; | |
1244 | break; | |
1245 | } | |
1246 | ||
1247 | if (found) { | |
1248 | idx = i; | |
1249 | opsfound += 1; | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | if (opsfound == 1) { | |
1254 | /* Exact match */ | |
1255 | ns->op = &ops[idx].states[0]; | |
1256 | if (flag) { | |
61b03bd7 | 1257 | /* |
1da177e4 LT |
1258 | * In this case the find_operation function was |
1259 | * called when address has just began input. But it isn't | |
1260 | * yet fully input and the current state must | |
1261 | * not be one of STATE_ADDR_*, but the STATE_ADDR_* | |
1262 | * state must be the next state (ns->nxstate). | |
1263 | */ | |
1264 | ns->stateidx = ns->npstates - 1; | |
1265 | } else { | |
1266 | ns->stateidx = ns->npstates; | |
1267 | } | |
1268 | ns->npstates = 0; | |
1269 | ns->state = ns->op[ns->stateidx]; | |
1270 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1271 | NS_DBG("find_operation: operation found, index: %d, state: %s, nxstate %s\n", | |
1272 | idx, get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1273 | return 0; | |
1274 | } | |
61b03bd7 | 1275 | |
1da177e4 LT |
1276 | if (opsfound == 0) { |
1277 | /* Nothing was found. Try to ignore previous commands (if any) and search again */ | |
1278 | if (ns->npstates != 0) { | |
1279 | NS_DBG("find_operation: no operation found, try again with state %s\n", | |
1280 | get_state_name(ns->state)); | |
1281 | ns->npstates = 0; | |
1282 | return find_operation(ns, 0); | |
1283 | ||
1284 | } | |
1285 | NS_DBG("find_operation: no operations found\n"); | |
1286 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1287 | return -2; | |
1288 | } | |
61b03bd7 | 1289 | |
1da177e4 LT |
1290 | if (flag) { |
1291 | /* This shouldn't happen */ | |
1292 | NS_DBG("find_operation: BUG, operation must be known if address is input\n"); | |
1293 | return -2; | |
1294 | } | |
61b03bd7 | 1295 | |
1da177e4 LT |
1296 | NS_DBG("find_operation: there is still ambiguity\n"); |
1297 | ||
1298 | ns->pstates[ns->npstates++] = ns->state; | |
1299 | ||
1300 | return -1; | |
1301 | } | |
1302 | ||
a9fc8991 AH |
1303 | static void put_pages(struct nandsim *ns) |
1304 | { | |
1305 | int i; | |
1306 | ||
1307 | for (i = 0; i < ns->held_cnt; i++) | |
09cbfeaf | 1308 | put_page(ns->held_pages[i]); |
a9fc8991 AH |
1309 | } |
1310 | ||
1311 | /* Get page cache pages in advance to provide NOFS memory allocation */ | |
1312 | static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t pos) | |
1313 | { | |
1314 | pgoff_t index, start_index, end_index; | |
1315 | struct page *page; | |
1316 | struct address_space *mapping = file->f_mapping; | |
1317 | ||
09cbfeaf KS |
1318 | start_index = pos >> PAGE_SHIFT; |
1319 | end_index = (pos + count - 1) >> PAGE_SHIFT; | |
a9fc8991 AH |
1320 | if (end_index - start_index + 1 > NS_MAX_HELD_PAGES) |
1321 | return -EINVAL; | |
1322 | ns->held_cnt = 0; | |
1323 | for (index = start_index; index <= end_index; index++) { | |
1324 | page = find_get_page(mapping, index); | |
1325 | if (page == NULL) { | |
1326 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1327 | if (page == NULL) { | |
1328 | write_inode_now(mapping->host, 1); | |
1329 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1330 | } | |
1331 | if (page == NULL) { | |
1332 | put_pages(ns); | |
1333 | return -ENOMEM; | |
1334 | } | |
1335 | unlock_page(page); | |
1336 | } | |
1337 | ns->held_pages[ns->held_cnt++] = page; | |
1338 | } | |
1339 | return 0; | |
1340 | } | |
1341 | ||
7bb307e8 | 1342 | static ssize_t read_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) |
a9fc8991 | 1343 | { |
a9fc8991 | 1344 | ssize_t tx; |
dcbe8214 VB |
1345 | int err; |
1346 | unsigned int noreclaim_flag; | |
a9fc8991 | 1347 | |
7bb307e8 | 1348 | err = get_pages(ns, file, count, pos); |
a9fc8991 AH |
1349 | if (err) |
1350 | return err; | |
dcbe8214 | 1351 | noreclaim_flag = memalloc_noreclaim_save(); |
bdd1d2d3 | 1352 | tx = kernel_read(file, buf, count, &pos); |
dcbe8214 | 1353 | memalloc_noreclaim_restore(noreclaim_flag); |
a9fc8991 AH |
1354 | put_pages(ns); |
1355 | return tx; | |
1356 | } | |
1357 | ||
7bb307e8 | 1358 | static ssize_t write_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) |
a9fc8991 | 1359 | { |
a9fc8991 | 1360 | ssize_t tx; |
dcbe8214 VB |
1361 | int err; |
1362 | unsigned int noreclaim_flag; | |
a9fc8991 | 1363 | |
7bb307e8 | 1364 | err = get_pages(ns, file, count, pos); |
a9fc8991 AH |
1365 | if (err) |
1366 | return err; | |
dcbe8214 | 1367 | noreclaim_flag = memalloc_noreclaim_save(); |
e13ec939 | 1368 | tx = kernel_write(file, buf, count, &pos); |
dcbe8214 | 1369 | memalloc_noreclaim_restore(noreclaim_flag); |
a9fc8991 AH |
1370 | put_pages(ns); |
1371 | return tx; | |
1372 | } | |
1373 | ||
d086d436 VK |
1374 | /* |
1375 | * Returns a pointer to the current page. | |
1376 | */ | |
1377 | static inline union ns_mem *NS_GET_PAGE(struct nandsim *ns) | |
1378 | { | |
1379 | return &(ns->pages[ns->regs.row]); | |
1380 | } | |
1381 | ||
1382 | /* | |
1383 | * Retuns a pointer to the current byte, within the current page. | |
1384 | */ | |
1385 | static inline u_char *NS_PAGE_BYTE_OFF(struct nandsim *ns) | |
1386 | { | |
1387 | return NS_GET_PAGE(ns)->byte + ns->regs.column + ns->regs.off; | |
1388 | } | |
1389 | ||
b2b263f2 | 1390 | static int do_read_error(struct nandsim *ns, int num) |
a9fc8991 AH |
1391 | { |
1392 | unsigned int page_no = ns->regs.row; | |
1393 | ||
1394 | if (read_error(page_no)) { | |
7e45bf83 | 1395 | prandom_bytes(ns->buf.byte, num); |
a9fc8991 AH |
1396 | NS_WARN("simulating read error in page %u\n", page_no); |
1397 | return 1; | |
1398 | } | |
1399 | return 0; | |
1400 | } | |
1401 | ||
b2b263f2 | 1402 | static void do_bit_flips(struct nandsim *ns, int num) |
a9fc8991 | 1403 | { |
aca662a3 | 1404 | if (bitflips && prandom_u32() < (1 << 22)) { |
a9fc8991 AH |
1405 | int flips = 1; |
1406 | if (bitflips > 1) | |
aca662a3 | 1407 | flips = (prandom_u32() % (int) bitflips) + 1; |
a9fc8991 | 1408 | while (flips--) { |
aca662a3 | 1409 | int pos = prandom_u32() % (num * 8); |
a9fc8991 AH |
1410 | ns->buf.byte[pos / 8] ^= (1 << (pos % 8)); |
1411 | NS_WARN("read_page: flipping bit %d in page %d " | |
1412 | "reading from %d ecc: corrected=%u failed=%u\n", | |
1413 | pos, ns->regs.row, ns->regs.column + ns->regs.off, | |
1414 | nsmtd->ecc_stats.corrected, nsmtd->ecc_stats.failed); | |
1415 | } | |
1416 | } | |
1417 | } | |
1418 | ||
d086d436 VK |
1419 | /* |
1420 | * Fill the NAND buffer with data read from the specified page. | |
1421 | */ | |
1422 | static void read_page(struct nandsim *ns, int num) | |
1423 | { | |
1424 | union ns_mem *mypage; | |
1425 | ||
a9fc8991 | 1426 | if (ns->cfile) { |
08efe91a | 1427 | if (!test_bit(ns->regs.row, ns->pages_written)) { |
a9fc8991 AH |
1428 | NS_DBG("read_page: page %d not written\n", ns->regs.row); |
1429 | memset(ns->buf.byte, 0xFF, num); | |
1430 | } else { | |
1431 | loff_t pos; | |
1432 | ssize_t tx; | |
1433 | ||
1434 | NS_DBG("read_page: page %d written, reading from %d\n", | |
1435 | ns->regs.row, ns->regs.column + ns->regs.off); | |
1436 | if (do_read_error(ns, num)) | |
1437 | return; | |
6d07fcf7 | 1438 | pos = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; |
7bb307e8 | 1439 | tx = read_file(ns, ns->cfile, ns->buf.byte, num, pos); |
a9fc8991 AH |
1440 | if (tx != num) { |
1441 | NS_ERR("read_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1442 | return; | |
1443 | } | |
1444 | do_bit_flips(ns, num); | |
1445 | } | |
1446 | return; | |
1447 | } | |
1448 | ||
d086d436 VK |
1449 | mypage = NS_GET_PAGE(ns); |
1450 | if (mypage->byte == NULL) { | |
1451 | NS_DBG("read_page: page %d not allocated\n", ns->regs.row); | |
1452 | memset(ns->buf.byte, 0xFF, num); | |
1453 | } else { | |
1454 | NS_DBG("read_page: page %d allocated, reading from %d\n", | |
1455 | ns->regs.row, ns->regs.column + ns->regs.off); | |
a9fc8991 | 1456 | if (do_read_error(ns, num)) |
514087e7 | 1457 | return; |
d086d436 | 1458 | memcpy(ns->buf.byte, NS_PAGE_BYTE_OFF(ns), num); |
a9fc8991 | 1459 | do_bit_flips(ns, num); |
d086d436 VK |
1460 | } |
1461 | } | |
1462 | ||
1463 | /* | |
1464 | * Erase all pages in the specified sector. | |
1465 | */ | |
1466 | static void erase_sector(struct nandsim *ns) | |
1467 | { | |
1468 | union ns_mem *mypage; | |
1469 | int i; | |
1470 | ||
a9fc8991 AH |
1471 | if (ns->cfile) { |
1472 | for (i = 0; i < ns->geom.pgsec; i++) | |
08efe91a AM |
1473 | if (__test_and_clear_bit(ns->regs.row + i, |
1474 | ns->pages_written)) { | |
a9fc8991 | 1475 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row + i); |
a9fc8991 AH |
1476 | } |
1477 | return; | |
1478 | } | |
1479 | ||
d086d436 VK |
1480 | mypage = NS_GET_PAGE(ns); |
1481 | for (i = 0; i < ns->geom.pgsec; i++) { | |
1482 | if (mypage->byte != NULL) { | |
1483 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row+i); | |
8a4c2495 | 1484 | kmem_cache_free(ns->nand_pages_slab, mypage->byte); |
d086d436 VK |
1485 | mypage->byte = NULL; |
1486 | } | |
1487 | mypage++; | |
1488 | } | |
1489 | } | |
1490 | ||
1491 | /* | |
1492 | * Program the specified page with the contents from the NAND buffer. | |
1493 | */ | |
1494 | static int prog_page(struct nandsim *ns, int num) | |
1495 | { | |
82810b7b | 1496 | int i; |
d086d436 VK |
1497 | union ns_mem *mypage; |
1498 | u_char *pg_off; | |
1499 | ||
a9fc8991 | 1500 | if (ns->cfile) { |
7bb307e8 | 1501 | loff_t off; |
a9fc8991 AH |
1502 | ssize_t tx; |
1503 | int all; | |
1504 | ||
1505 | NS_DBG("prog_page: writing page %d\n", ns->regs.row); | |
1506 | pg_off = ns->file_buf + ns->regs.column + ns->regs.off; | |
6d07fcf7 | 1507 | off = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; |
08efe91a | 1508 | if (!test_bit(ns->regs.row, ns->pages_written)) { |
a9fc8991 AH |
1509 | all = 1; |
1510 | memset(ns->file_buf, 0xff, ns->geom.pgszoob); | |
1511 | } else { | |
1512 | all = 0; | |
7bb307e8 | 1513 | tx = read_file(ns, ns->cfile, pg_off, num, off); |
a9fc8991 AH |
1514 | if (tx != num) { |
1515 | NS_ERR("prog_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1516 | return -1; | |
1517 | } | |
1518 | } | |
1519 | for (i = 0; i < num; i++) | |
1520 | pg_off[i] &= ns->buf.byte[i]; | |
1521 | if (all) { | |
7bb307e8 AV |
1522 | loff_t pos = (loff_t)ns->regs.row * ns->geom.pgszoob; |
1523 | tx = write_file(ns, ns->cfile, ns->file_buf, ns->geom.pgszoob, pos); | |
a9fc8991 AH |
1524 | if (tx != ns->geom.pgszoob) { |
1525 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1526 | return -1; | |
1527 | } | |
08efe91a | 1528 | __set_bit(ns->regs.row, ns->pages_written); |
a9fc8991 | 1529 | } else { |
7bb307e8 | 1530 | tx = write_file(ns, ns->cfile, pg_off, num, off); |
a9fc8991 AH |
1531 | if (tx != num) { |
1532 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1533 | return -1; | |
1534 | } | |
1535 | } | |
1536 | return 0; | |
1537 | } | |
1538 | ||
d086d436 VK |
1539 | mypage = NS_GET_PAGE(ns); |
1540 | if (mypage->byte == NULL) { | |
1541 | NS_DBG("prog_page: allocating page %d\n", ns->regs.row); | |
98b830d2 AB |
1542 | /* |
1543 | * We allocate memory with GFP_NOFS because a flash FS may | |
1544 | * utilize this. If it is holding an FS lock, then gets here, | |
8a4c2495 AK |
1545 | * then kernel memory alloc runs writeback which goes to the FS |
1546 | * again and deadlocks. This was seen in practice. | |
98b830d2 | 1547 | */ |
8a4c2495 | 1548 | mypage->byte = kmem_cache_alloc(ns->nand_pages_slab, GFP_NOFS); |
d086d436 VK |
1549 | if (mypage->byte == NULL) { |
1550 | NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row); | |
1551 | return -1; | |
1552 | } | |
1553 | memset(mypage->byte, 0xFF, ns->geom.pgszoob); | |
1554 | } | |
1555 | ||
1556 | pg_off = NS_PAGE_BYTE_OFF(ns); | |
82810b7b AB |
1557 | for (i = 0; i < num; i++) |
1558 | pg_off[i] &= ns->buf.byte[i]; | |
d086d436 VK |
1559 | |
1560 | return 0; | |
1561 | } | |
1562 | ||
1da177e4 LT |
1563 | /* |
1564 | * If state has any action bit, perform this action. | |
1565 | * | |
1566 | * RETURNS: 0 if success, -1 if error. | |
1567 | */ | |
a5602146 | 1568 | static int do_state_action(struct nandsim *ns, uint32_t action) |
1da177e4 | 1569 | { |
d086d436 | 1570 | int num; |
1da177e4 | 1571 | int busdiv = ns->busw == 8 ? 1 : 2; |
514087e7 | 1572 | unsigned int erase_block_no, page_no; |
1da177e4 LT |
1573 | |
1574 | action &= ACTION_MASK; | |
61b03bd7 | 1575 | |
1da177e4 LT |
1576 | /* Check that page address input is correct */ |
1577 | if (action != ACTION_SECERASE && ns->regs.row >= ns->geom.pgnum) { | |
1578 | NS_WARN("do_state_action: wrong page number (%#x)\n", ns->regs.row); | |
1579 | return -1; | |
1580 | } | |
1581 | ||
1582 | switch (action) { | |
1583 | ||
1584 | case ACTION_CPY: | |
1585 | /* | |
1586 | * Copy page data to the internal buffer. | |
1587 | */ | |
1588 | ||
1589 | /* Column shouldn't be very large */ | |
1590 | if (ns->regs.column >= (ns->geom.pgszoob - ns->regs.off)) { | |
1591 | NS_ERR("do_state_action: column number is too large\n"); | |
1592 | break; | |
1593 | } | |
1594 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
d086d436 | 1595 | read_page(ns, num); |
1da177e4 LT |
1596 | |
1597 | NS_DBG("do_state_action: (ACTION_CPY:) copy %d bytes to int buf, raw offset %d\n", | |
1598 | num, NS_RAW_OFFSET(ns) + ns->regs.off); | |
61b03bd7 | 1599 | |
1da177e4 LT |
1600 | if (ns->regs.off == 0) |
1601 | NS_LOG("read page %d\n", ns->regs.row); | |
1602 | else if (ns->regs.off < ns->geom.pgsz) | |
1603 | NS_LOG("read page %d (second half)\n", ns->regs.row); | |
1604 | else | |
1605 | NS_LOG("read OOB of page %d\n", ns->regs.row); | |
61b03bd7 | 1606 | |
1da177e4 LT |
1607 | NS_UDELAY(access_delay); |
1608 | NS_UDELAY(input_cycle * ns->geom.pgsz / 1000 / busdiv); | |
1609 | ||
1610 | break; | |
1611 | ||
1612 | case ACTION_SECERASE: | |
1613 | /* | |
1614 | * Erase sector. | |
1615 | */ | |
61b03bd7 | 1616 | |
1da177e4 LT |
1617 | if (ns->lines.wp) { |
1618 | NS_ERR("do_state_action: device is write-protected, ignore sector erase\n"); | |
1619 | return -1; | |
1620 | } | |
61b03bd7 | 1621 | |
1da177e4 LT |
1622 | if (ns->regs.row >= ns->geom.pgnum - ns->geom.pgsec |
1623 | || (ns->regs.row & ~(ns->geom.secsz - 1))) { | |
1624 | NS_ERR("do_state_action: wrong sector address (%#x)\n", ns->regs.row); | |
1625 | return -1; | |
1626 | } | |
61b03bd7 | 1627 | |
1da177e4 LT |
1628 | ns->regs.row = (ns->regs.row << |
1629 | 8 * (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) | ns->regs.column; | |
1630 | ns->regs.column = 0; | |
61b03bd7 | 1631 | |
514087e7 AH |
1632 | erase_block_no = ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift); |
1633 | ||
1da177e4 LT |
1634 | NS_DBG("do_state_action: erase sector at address %#x, off = %d\n", |
1635 | ns->regs.row, NS_RAW_OFFSET(ns)); | |
514087e7 | 1636 | NS_LOG("erase sector %u\n", erase_block_no); |
1da177e4 | 1637 | |
d086d436 | 1638 | erase_sector(ns); |
61b03bd7 | 1639 | |
1da177e4 | 1640 | NS_MDELAY(erase_delay); |
61b03bd7 | 1641 | |
57aa6b54 AH |
1642 | if (erase_block_wear) |
1643 | update_wear(erase_block_no); | |
1644 | ||
514087e7 AH |
1645 | if (erase_error(erase_block_no)) { |
1646 | NS_WARN("simulating erase failure in erase block %u\n", erase_block_no); | |
1647 | return -1; | |
1648 | } | |
1649 | ||
1da177e4 LT |
1650 | break; |
1651 | ||
1652 | case ACTION_PRGPAGE: | |
1653 | /* | |
daf05ec0 | 1654 | * Program page - move internal buffer data to the page. |
1da177e4 LT |
1655 | */ |
1656 | ||
1657 | if (ns->lines.wp) { | |
1658 | NS_WARN("do_state_action: device is write-protected, programm\n"); | |
1659 | return -1; | |
1660 | } | |
1661 | ||
1662 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1663 | if (num != ns->regs.count) { | |
1664 | NS_ERR("do_state_action: too few bytes were input (%d instead of %d)\n", | |
1665 | ns->regs.count, num); | |
1666 | return -1; | |
1667 | } | |
1668 | ||
d086d436 VK |
1669 | if (prog_page(ns, num) == -1) |
1670 | return -1; | |
1da177e4 | 1671 | |
514087e7 AH |
1672 | page_no = ns->regs.row; |
1673 | ||
1da177e4 LT |
1674 | NS_DBG("do_state_action: copy %d bytes from int buf to (%#x, %#x), raw off = %d\n", |
1675 | num, ns->regs.row, ns->regs.column, NS_RAW_OFFSET(ns) + ns->regs.off); | |
1676 | NS_LOG("programm page %d\n", ns->regs.row); | |
61b03bd7 | 1677 | |
1da177e4 LT |
1678 | NS_UDELAY(programm_delay); |
1679 | NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv); | |
61b03bd7 | 1680 | |
514087e7 AH |
1681 | if (write_error(page_no)) { |
1682 | NS_WARN("simulating write failure in page %u\n", page_no); | |
1683 | return -1; | |
1684 | } | |
1685 | ||
1da177e4 | 1686 | break; |
61b03bd7 | 1687 | |
1da177e4 LT |
1688 | case ACTION_ZEROOFF: |
1689 | NS_DBG("do_state_action: set internal offset to 0\n"); | |
1690 | ns->regs.off = 0; | |
1691 | break; | |
1692 | ||
1693 | case ACTION_HALFOFF: | |
1694 | if (!(ns->options & OPT_PAGE512_8BIT)) { | |
1695 | NS_ERR("do_state_action: BUG! can't skip half of page for non-512" | |
1696 | "byte page size 8x chips\n"); | |
1697 | return -1; | |
1698 | } | |
1699 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz/2); | |
1700 | ns->regs.off = ns->geom.pgsz/2; | |
1701 | break; | |
1702 | ||
1703 | case ACTION_OOBOFF: | |
1704 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz); | |
1705 | ns->regs.off = ns->geom.pgsz; | |
1706 | break; | |
61b03bd7 | 1707 | |
1da177e4 LT |
1708 | default: |
1709 | NS_DBG("do_state_action: BUG! unknown action\n"); | |
1710 | } | |
1711 | ||
1712 | return 0; | |
1713 | } | |
1714 | ||
1715 | /* | |
1716 | * Switch simulator's state. | |
1717 | */ | |
a5602146 | 1718 | static void switch_state(struct nandsim *ns) |
1da177e4 LT |
1719 | { |
1720 | if (ns->op) { | |
1721 | /* | |
1722 | * The current operation have already been identified. | |
1723 | * Just follow the states chain. | |
1724 | */ | |
61b03bd7 | 1725 | |
1da177e4 LT |
1726 | ns->stateidx += 1; |
1727 | ns->state = ns->nxstate; | |
1728 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1729 | ||
1730 | NS_DBG("switch_state: operation is known, switch to the next state, " | |
1731 | "state: %s, nxstate: %s\n", | |
1732 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1733 | ||
1734 | /* See, whether we need to do some action */ | |
1735 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1736 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1737 | return; | |
1738 | } | |
61b03bd7 | 1739 | |
1da177e4 LT |
1740 | } else { |
1741 | /* | |
1742 | * We don't yet know which operation we perform. | |
1743 | * Try to identify it. | |
1744 | */ | |
1745 | ||
61b03bd7 | 1746 | /* |
1da177e4 LT |
1747 | * The only event causing the switch_state function to |
1748 | * be called with yet unknown operation is new command. | |
1749 | */ | |
1750 | ns->state = get_state_by_command(ns->regs.command); | |
1751 | ||
1752 | NS_DBG("switch_state: operation is unknown, try to find it\n"); | |
1753 | ||
1754 | if (find_operation(ns, 0) != 0) | |
1755 | return; | |
1756 | ||
1757 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1758 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1759 | return; | |
1760 | } | |
1761 | } | |
1762 | ||
1763 | /* For 16x devices column means the page offset in words */ | |
1764 | if ((ns->nxstate & STATE_ADDR_MASK) && ns->busw == 16) { | |
1765 | NS_DBG("switch_state: double the column number for 16x device\n"); | |
1766 | ns->regs.column <<= 1; | |
1767 | } | |
1768 | ||
1769 | if (NS_STATE(ns->nxstate) == STATE_READY) { | |
1770 | /* | |
1771 | * The current state is the last. Return to STATE_READY | |
1772 | */ | |
1773 | ||
1774 | u_char status = NS_STATUS_OK(ns); | |
61b03bd7 | 1775 | |
1da177e4 LT |
1776 | /* In case of data states, see if all bytes were input/output */ |
1777 | if ((ns->state & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) | |
1778 | && ns->regs.count != ns->regs.num) { | |
1779 | NS_WARN("switch_state: not all bytes were processed, %d left\n", | |
1780 | ns->regs.num - ns->regs.count); | |
1781 | status = NS_STATUS_FAILED(ns); | |
1782 | } | |
61b03bd7 | 1783 | |
1da177e4 LT |
1784 | NS_DBG("switch_state: operation complete, switch to STATE_READY state\n"); |
1785 | ||
1786 | switch_to_ready_state(ns, status); | |
1787 | ||
1788 | return; | |
1789 | } else if (ns->nxstate & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) { | |
61b03bd7 | 1790 | /* |
1da177e4 LT |
1791 | * If the next state is data input/output, switch to it now |
1792 | */ | |
61b03bd7 | 1793 | |
1da177e4 LT |
1794 | ns->state = ns->nxstate; |
1795 | ns->nxstate = ns->op[++ns->stateidx + 1]; | |
1796 | ns->regs.num = ns->regs.count = 0; | |
1797 | ||
1798 | NS_DBG("switch_state: the next state is data I/O, switch, " | |
1799 | "state: %s, nxstate: %s\n", | |
1800 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1801 | ||
1802 | /* | |
1803 | * Set the internal register to the count of bytes which | |
1804 | * are expected to be input or output | |
1805 | */ | |
1806 | switch (NS_STATE(ns->state)) { | |
1807 | case STATE_DATAIN: | |
1808 | case STATE_DATAOUT: | |
1809 | ns->regs.num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1810 | break; | |
61b03bd7 | 1811 | |
1da177e4 LT |
1812 | case STATE_DATAOUT_ID: |
1813 | ns->regs.num = ns->geom.idbytes; | |
1814 | break; | |
61b03bd7 | 1815 | |
1da177e4 | 1816 | case STATE_DATAOUT_STATUS: |
1da177e4 LT |
1817 | ns->regs.count = ns->regs.num = 0; |
1818 | break; | |
61b03bd7 | 1819 | |
1da177e4 LT |
1820 | default: |
1821 | NS_ERR("switch_state: BUG! unknown data state\n"); | |
1822 | } | |
1823 | ||
1824 | } else if (ns->nxstate & STATE_ADDR_MASK) { | |
1825 | /* | |
1826 | * If the next state is address input, set the internal | |
1827 | * register to the number of expected address bytes | |
1828 | */ | |
1829 | ||
1830 | ns->regs.count = 0; | |
61b03bd7 | 1831 | |
1da177e4 LT |
1832 | switch (NS_STATE(ns->nxstate)) { |
1833 | case STATE_ADDR_PAGE: | |
1834 | ns->regs.num = ns->geom.pgaddrbytes; | |
61b03bd7 | 1835 | |
1da177e4 LT |
1836 | break; |
1837 | case STATE_ADDR_SEC: | |
1838 | ns->regs.num = ns->geom.secaddrbytes; | |
1839 | break; | |
61b03bd7 | 1840 | |
1da177e4 LT |
1841 | case STATE_ADDR_ZERO: |
1842 | ns->regs.num = 1; | |
1843 | break; | |
1844 | ||
74216be4 AB |
1845 | case STATE_ADDR_COLUMN: |
1846 | /* Column address is always 2 bytes */ | |
1847 | ns->regs.num = ns->geom.pgaddrbytes - ns->geom.secaddrbytes; | |
1848 | break; | |
1849 | ||
1da177e4 LT |
1850 | default: |
1851 | NS_ERR("switch_state: BUG! unknown address state\n"); | |
1852 | } | |
1853 | } else { | |
61b03bd7 | 1854 | /* |
1da177e4 LT |
1855 | * Just reset internal counters. |
1856 | */ | |
1857 | ||
1858 | ns->regs.num = 0; | |
1859 | ns->regs.count = 0; | |
1860 | } | |
1861 | } | |
1862 | ||
7e534323 | 1863 | static u_char ns_nand_read_byte(struct nand_chip *chip) |
1da177e4 | 1864 | { |
c66b651c | 1865 | struct nandsim *ns = nand_get_controller_data(chip); |
1da177e4 LT |
1866 | u_char outb = 0x00; |
1867 | ||
1868 | /* Sanity and correctness checks */ | |
1869 | if (!ns->lines.ce) { | |
1870 | NS_ERR("read_byte: chip is disabled, return %#x\n", (uint)outb); | |
1871 | return outb; | |
1872 | } | |
1873 | if (ns->lines.ale || ns->lines.cle) { | |
1874 | NS_ERR("read_byte: ALE or CLE pin is high, return %#x\n", (uint)outb); | |
1875 | return outb; | |
1876 | } | |
1877 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
1878 | NS_WARN("read_byte: unexpected data output cycle, state is %s " | |
1879 | "return %#x\n", get_state_name(ns->state), (uint)outb); | |
1880 | return outb; | |
1881 | } | |
1882 | ||
1883 | /* Status register may be read as many times as it is wanted */ | |
1884 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS) { | |
1885 | NS_DBG("read_byte: return %#x status\n", ns->regs.status); | |
1886 | return ns->regs.status; | |
1887 | } | |
1888 | ||
1889 | /* Check if there is any data in the internal buffer which may be read */ | |
1890 | if (ns->regs.count == ns->regs.num) { | |
1891 | NS_WARN("read_byte: no more data to output, return %#x\n", (uint)outb); | |
1892 | return outb; | |
1893 | } | |
1894 | ||
1895 | switch (NS_STATE(ns->state)) { | |
1896 | case STATE_DATAOUT: | |
1897 | if (ns->busw == 8) { | |
1898 | outb = ns->buf.byte[ns->regs.count]; | |
1899 | ns->regs.count += 1; | |
1900 | } else { | |
1901 | outb = (u_char)cpu_to_le16(ns->buf.word[ns->regs.count >> 1]); | |
1902 | ns->regs.count += 2; | |
1903 | } | |
1904 | break; | |
1905 | case STATE_DATAOUT_ID: | |
1906 | NS_DBG("read_byte: read ID byte %d, total = %d\n", ns->regs.count, ns->regs.num); | |
1907 | outb = ns->ids[ns->regs.count]; | |
1908 | ns->regs.count += 1; | |
1909 | break; | |
1910 | default: | |
1911 | BUG(); | |
1912 | } | |
61b03bd7 | 1913 | |
1da177e4 LT |
1914 | if (ns->regs.count == ns->regs.num) { |
1915 | NS_DBG("read_byte: all bytes were read\n"); | |
1916 | ||
831d316b | 1917 | if (NS_STATE(ns->nxstate) == STATE_READY) |
1da177e4 | 1918 | switch_state(ns); |
1da177e4 | 1919 | } |
61b03bd7 | 1920 | |
1da177e4 LT |
1921 | return outb; |
1922 | } | |
1923 | ||
c0739d85 | 1924 | static void ns_nand_write_byte(struct nand_chip *chip, u_char byte) |
1da177e4 | 1925 | { |
c66b651c | 1926 | struct nandsim *ns = nand_get_controller_data(chip); |
61b03bd7 | 1927 | |
1da177e4 LT |
1928 | /* Sanity and correctness checks */ |
1929 | if (!ns->lines.ce) { | |
1930 | NS_ERR("write_byte: chip is disabled, ignore write\n"); | |
1931 | return; | |
1932 | } | |
1933 | if (ns->lines.ale && ns->lines.cle) { | |
1934 | NS_ERR("write_byte: ALE and CLE pins are high simultaneously, ignore write\n"); | |
1935 | return; | |
1936 | } | |
61b03bd7 | 1937 | |
1da177e4 LT |
1938 | if (ns->lines.cle == 1) { |
1939 | /* | |
1940 | * The byte written is a command. | |
1941 | */ | |
1942 | ||
1943 | if (byte == NAND_CMD_RESET) { | |
1944 | NS_LOG("reset chip\n"); | |
1945 | switch_to_ready_state(ns, NS_STATUS_OK(ns)); | |
1946 | return; | |
1947 | } | |
1948 | ||
74216be4 AB |
1949 | /* Check that the command byte is correct */ |
1950 | if (check_command(byte)) { | |
1951 | NS_ERR("write_byte: unknown command %#x\n", (uint)byte); | |
1952 | return; | |
1953 | } | |
1954 | ||
1da177e4 | 1955 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS |
74216be4 AB |
1956 | || NS_STATE(ns->state) == STATE_DATAOUT) { |
1957 | int row = ns->regs.row; | |
1958 | ||
1da177e4 | 1959 | switch_state(ns); |
74216be4 AB |
1960 | if (byte == NAND_CMD_RNDOUT) |
1961 | ns->regs.row = row; | |
1962 | } | |
1da177e4 LT |
1963 | |
1964 | /* Check if chip is expecting command */ | |
1965 | if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) { | |
9359ea46 AH |
1966 | /* Do not warn if only 2 id bytes are read */ |
1967 | if (!(ns->regs.command == NAND_CMD_READID && | |
1968 | NS_STATE(ns->state) == STATE_DATAOUT_ID && ns->regs.count == 2)) { | |
1969 | /* | |
1970 | * We are in situation when something else (not command) | |
1971 | * was expected but command was input. In this case ignore | |
1972 | * previous command(s)/state(s) and accept the last one. | |
1973 | */ | |
1974 | NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, " | |
1975 | "ignore previous states\n", (uint)byte, get_state_name(ns->nxstate)); | |
1976 | } | |
1da177e4 LT |
1977 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); |
1978 | } | |
61b03bd7 | 1979 | |
1da177e4 LT |
1980 | NS_DBG("command byte corresponding to %s state accepted\n", |
1981 | get_state_name(get_state_by_command(byte))); | |
1982 | ns->regs.command = byte; | |
1983 | switch_state(ns); | |
1984 | ||
1985 | } else if (ns->lines.ale == 1) { | |
1986 | /* | |
1987 | * The byte written is an address. | |
1988 | */ | |
1989 | ||
1990 | if (NS_STATE(ns->nxstate) == STATE_UNKNOWN) { | |
1991 | ||
1992 | NS_DBG("write_byte: operation isn't known yet, identify it\n"); | |
1993 | ||
1994 | if (find_operation(ns, 1) < 0) | |
1995 | return; | |
61b03bd7 | 1996 | |
1da177e4 LT |
1997 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { |
1998 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1999 | return; | |
2000 | } | |
61b03bd7 | 2001 | |
1da177e4 LT |
2002 | ns->regs.count = 0; |
2003 | switch (NS_STATE(ns->nxstate)) { | |
2004 | case STATE_ADDR_PAGE: | |
2005 | ns->regs.num = ns->geom.pgaddrbytes; | |
2006 | break; | |
2007 | case STATE_ADDR_SEC: | |
2008 | ns->regs.num = ns->geom.secaddrbytes; | |
2009 | break; | |
2010 | case STATE_ADDR_ZERO: | |
2011 | ns->regs.num = 1; | |
2012 | break; | |
2013 | default: | |
2014 | BUG(); | |
2015 | } | |
2016 | } | |
2017 | ||
2018 | /* Check that chip is expecting address */ | |
2019 | if (!(ns->nxstate & STATE_ADDR_MASK)) { | |
2020 | NS_ERR("write_byte: address (%#x) isn't expected, expected state is %s, " | |
2021 | "switch to STATE_READY\n", (uint)byte, get_state_name(ns->nxstate)); | |
2022 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2023 | return; | |
2024 | } | |
61b03bd7 | 2025 | |
1da177e4 LT |
2026 | /* Check if this is expected byte */ |
2027 | if (ns->regs.count == ns->regs.num) { | |
2028 | NS_ERR("write_byte: no more address bytes expected\n"); | |
2029 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2030 | return; | |
2031 | } | |
2032 | ||
2033 | accept_addr_byte(ns, byte); | |
2034 | ||
2035 | ns->regs.count += 1; | |
2036 | ||
2037 | NS_DBG("write_byte: address byte %#x was accepted (%d bytes input, %d expected)\n", | |
2038 | (uint)byte, ns->regs.count, ns->regs.num); | |
2039 | ||
2040 | if (ns->regs.count == ns->regs.num) { | |
2041 | NS_DBG("address (%#x, %#x) is accepted\n", ns->regs.row, ns->regs.column); | |
2042 | switch_state(ns); | |
2043 | } | |
61b03bd7 | 2044 | |
1da177e4 LT |
2045 | } else { |
2046 | /* | |
2047 | * The byte written is an input data. | |
2048 | */ | |
61b03bd7 | 2049 | |
1da177e4 LT |
2050 | /* Check that chip is expecting data input */ |
2051 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2052 | NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, " | |
2053 | "switch to %s\n", (uint)byte, | |
2054 | get_state_name(ns->state), get_state_name(STATE_READY)); | |
2055 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2056 | return; | |
2057 | } | |
2058 | ||
2059 | /* Check if this is expected byte */ | |
2060 | if (ns->regs.count == ns->regs.num) { | |
2061 | NS_WARN("write_byte: %u input bytes has already been accepted, ignore write\n", | |
2062 | ns->regs.num); | |
2063 | return; | |
2064 | } | |
2065 | ||
2066 | if (ns->busw == 8) { | |
2067 | ns->buf.byte[ns->regs.count] = byte; | |
2068 | ns->regs.count += 1; | |
2069 | } else { | |
2070 | ns->buf.word[ns->regs.count >> 1] = cpu_to_le16((uint16_t)byte); | |
2071 | ns->regs.count += 2; | |
2072 | } | |
2073 | } | |
2074 | ||
2075 | return; | |
2076 | } | |
2077 | ||
c0739d85 BB |
2078 | static void ns_nand_write_buf(struct nand_chip *chip, const u_char *buf, |
2079 | int len) | |
1da177e4 | 2080 | { |
c66b651c | 2081 | struct nandsim *ns = nand_get_controller_data(chip); |
1da177e4 LT |
2082 | |
2083 | /* Check that chip is expecting data input */ | |
2084 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2085 | NS_ERR("write_buf: data input isn't expected, state is %s, " | |
2086 | "switch to STATE_READY\n", get_state_name(ns->state)); | |
2087 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2088 | return; | |
2089 | } | |
2090 | ||
2091 | /* Check if these are expected bytes */ | |
2092 | if (ns->regs.count + len > ns->regs.num) { | |
2093 | NS_ERR("write_buf: too many input bytes\n"); | |
2094 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2095 | return; | |
2096 | } | |
2097 | ||
2098 | memcpy(ns->buf.byte + ns->regs.count, buf, len); | |
2099 | ns->regs.count += len; | |
61b03bd7 | 2100 | |
1da177e4 LT |
2101 | if (ns->regs.count == ns->regs.num) { |
2102 | NS_DBG("write_buf: %d bytes were written\n", ns->regs.count); | |
2103 | } | |
2104 | } | |
2105 | ||
7e534323 | 2106 | static void ns_nand_read_buf(struct nand_chip *chip, u_char *buf, int len) |
1da177e4 | 2107 | { |
c66b651c | 2108 | struct nandsim *ns = nand_get_controller_data(chip); |
1da177e4 LT |
2109 | |
2110 | /* Sanity and correctness checks */ | |
2111 | if (!ns->lines.ce) { | |
2112 | NS_ERR("read_buf: chip is disabled\n"); | |
2113 | return; | |
2114 | } | |
2115 | if (ns->lines.ale || ns->lines.cle) { | |
2116 | NS_ERR("read_buf: ALE or CLE pin is high\n"); | |
2117 | return; | |
2118 | } | |
2119 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
2120 | NS_WARN("read_buf: unexpected data output cycle, current state is %s\n", | |
2121 | get_state_name(ns->state)); | |
2122 | return; | |
2123 | } | |
2124 | ||
2125 | if (NS_STATE(ns->state) != STATE_DATAOUT) { | |
2126 | int i; | |
2127 | ||
2128 | for (i = 0; i < len; i++) | |
1c14fe21 | 2129 | buf[i] = ns_nand_read_byte(chip); |
1da177e4 LT |
2130 | |
2131 | return; | |
2132 | } | |
2133 | ||
2134 | /* Check if these are expected bytes */ | |
2135 | if (ns->regs.count + len > ns->regs.num) { | |
2136 | NS_ERR("read_buf: too many bytes to read\n"); | |
2137 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2138 | return; | |
2139 | } | |
2140 | ||
2141 | memcpy(buf, ns->buf.byte + ns->regs.count, len); | |
2142 | ns->regs.count += len; | |
61b03bd7 | 2143 | |
1da177e4 | 2144 | if (ns->regs.count == ns->regs.num) { |
831d316b | 2145 | if (NS_STATE(ns->nxstate) == STATE_READY) |
1da177e4 LT |
2146 | switch_state(ns); |
2147 | } | |
61b03bd7 | 2148 | |
1da177e4 LT |
2149 | return; |
2150 | } | |
2151 | ||
1c14fe21 RW |
2152 | static int ns_exec_op(struct nand_chip *chip, const struct nand_operation *op, |
2153 | bool check_only) | |
2154 | { | |
2155 | int i; | |
2156 | unsigned int op_id; | |
2157 | const struct nand_op_instr *instr = NULL; | |
2158 | struct nandsim *ns = nand_get_controller_data(chip); | |
2159 | ||
2160 | ns->lines.ce = 1; | |
2161 | ||
2162 | for (op_id = 0; op_id < op->ninstrs; op_id++) { | |
2163 | instr = &op->instrs[op_id]; | |
2164 | ns->lines.cle = 0; | |
2165 | ns->lines.ale = 0; | |
2166 | ||
2167 | switch (instr->type) { | |
2168 | case NAND_OP_CMD_INSTR: | |
2169 | ns->lines.cle = 1; | |
2170 | ns_nand_write_byte(chip, instr->ctx.cmd.opcode); | |
2171 | break; | |
2172 | case NAND_OP_ADDR_INSTR: | |
2173 | ns->lines.ale = 1; | |
2174 | for (i = 0; i < instr->ctx.addr.naddrs; i++) | |
2175 | ns_nand_write_byte(chip, instr->ctx.addr.addrs[i]); | |
2176 | break; | |
2177 | case NAND_OP_DATA_IN_INSTR: | |
2178 | ns_nand_read_buf(chip, instr->ctx.data.buf.in, instr->ctx.data.len); | |
2179 | break; | |
2180 | case NAND_OP_DATA_OUT_INSTR: | |
2181 | ns_nand_write_buf(chip, instr->ctx.data.buf.out, instr->ctx.data.len); | |
2182 | break; | |
2183 | case NAND_OP_WAITRDY_INSTR: | |
2184 | /* we are always ready */ | |
2185 | break; | |
2186 | } | |
2187 | } | |
2188 | ||
2189 | return 0; | |
2190 | } | |
2191 | ||
5cbad9e3 MR |
2192 | static int ns_attach_chip(struct nand_chip *chip) |
2193 | { | |
2194 | unsigned int eccsteps, eccbytes; | |
2195 | ||
2196 | if (!bch) | |
2197 | return 0; | |
2198 | ||
2199 | if (!mtd_nand_has_bch()) { | |
2200 | NS_ERR("BCH ECC support is disabled\n"); | |
2201 | return -EINVAL; | |
2202 | } | |
2203 | ||
2204 | /* Use 512-byte ecc blocks */ | |
2205 | eccsteps = nsmtd->writesize / 512; | |
2206 | eccbytes = ((bch * 13) + 7) / 8; | |
2207 | ||
2208 | /* Do not bother supporting small page devices */ | |
2209 | if (nsmtd->oobsize < 64 || !eccsteps) { | |
2210 | NS_ERR("BCH not available on small page devices\n"); | |
2211 | return -EINVAL; | |
2212 | } | |
2213 | ||
2214 | if (((eccbytes * eccsteps) + 2) > nsmtd->oobsize) { | |
2215 | NS_ERR("Invalid BCH value %u\n", bch); | |
2216 | return -EINVAL; | |
2217 | } | |
2218 | ||
2219 | chip->ecc.mode = NAND_ECC_SOFT; | |
2220 | chip->ecc.algo = NAND_ECC_BCH; | |
2221 | chip->ecc.size = 512; | |
2222 | chip->ecc.strength = bch; | |
2223 | chip->ecc.bytes = eccbytes; | |
2224 | ||
2225 | NS_INFO("Using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size); | |
2226 | ||
2227 | return 0; | |
2228 | } | |
2229 | ||
2230 | static const struct nand_controller_ops ns_controller_ops = { | |
2231 | .attach_chip = ns_attach_chip, | |
1c14fe21 | 2232 | .exec_op = ns_exec_op, |
5cbad9e3 MR |
2233 | }; |
2234 | ||
1da177e4 LT |
2235 | /* |
2236 | * Module initialization function | |
2237 | */ | |
2b9175c1 | 2238 | static int __init ns_init_module(void) |
1da177e4 LT |
2239 | { |
2240 | struct nand_chip *chip; | |
74aee14c | 2241 | struct nandsim *ns; |
2b77a0ed | 2242 | int retval = -ENOMEM, i; |
1da177e4 LT |
2243 | |
2244 | if (bus_width != 8 && bus_width != 16) { | |
2245 | NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width); | |
2246 | return -EINVAL; | |
2247 | } | |
61b03bd7 | 2248 | |
74aee14c RW |
2249 | ns = kzalloc(sizeof(struct nandsim), GFP_KERNEL); |
2250 | if (!ns) { | |
1da177e4 LT |
2251 | NS_ERR("unable to allocate core structures.\n"); |
2252 | return -ENOMEM; | |
2253 | } | |
74aee14c | 2254 | chip = &ns->chip; |
ed10f165 | 2255 | nsmtd = nand_to_mtd(chip); |
74aee14c | 2256 | nand_set_controller_data(chip, (void *)ns); |
1da177e4 | 2257 | |
6dfc6d25 | 2258 | chip->ecc.mode = NAND_ECC_SOFT; |
8ae6bcd1 | 2259 | chip->ecc.algo = NAND_ECC_HAMMING; |
a5ac8aeb AH |
2260 | /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */ |
2261 | /* and 'badblocks' parameters to work */ | |
51502287 | 2262 | chip->options |= NAND_SKIP_BBTSCAN; |
1da177e4 | 2263 | |
ce85b79f SAS |
2264 | switch (bbt) { |
2265 | case 2: | |
64f1da10 GS |
2266 | chip->bbt_options |= NAND_BBT_NO_OOB; |
2267 | /* fall through */ | |
ce85b79f | 2268 | case 1: |
64f1da10 GS |
2269 | chip->bbt_options |= NAND_BBT_USE_FLASH; |
2270 | /* fall through */ | |
ce85b79f SAS |
2271 | case 0: |
2272 | break; | |
2273 | default: | |
2274 | NS_ERR("bbt has to be 0..2\n"); | |
2275 | retval = -EINVAL; | |
2276 | goto error; | |
2277 | } | |
61b03bd7 | 2278 | /* |
1da177e4 | 2279 | * Perform minimum nandsim structure initialization to handle |
61b03bd7 | 2280 | * the initial ID read command correctly |
1da177e4 | 2281 | */ |
b00358a5 | 2282 | if (id_bytes[6] != 0xFF || id_bytes[7] != 0xFF) |
74aee14c | 2283 | ns->geom.idbytes = 8; |
b00358a5 | 2284 | else if (id_bytes[4] != 0xFF || id_bytes[5] != 0xFF) |
74aee14c | 2285 | ns->geom.idbytes = 6; |
b00358a5 | 2286 | else if (id_bytes[2] != 0xFF || id_bytes[3] != 0xFF) |
74aee14c | 2287 | ns->geom.idbytes = 4; |
1da177e4 | 2288 | else |
74aee14c RW |
2289 | ns->geom.idbytes = 2; |
2290 | ns->regs.status = NS_STATUS_OK(ns); | |
2291 | ns->nxstate = STATE_UNKNOWN; | |
2292 | ns->options |= OPT_PAGE512; /* temporary value */ | |
2293 | memcpy(ns->ids, id_bytes, sizeof(ns->ids)); | |
1da177e4 | 2294 | if (bus_width == 16) { |
74aee14c | 2295 | ns->busw = 16; |
1da177e4 LT |
2296 | chip->options |= NAND_BUSWIDTH_16; |
2297 | } | |
2298 | ||
552d9205 DW |
2299 | nsmtd->owner = THIS_MODULE; |
2300 | ||
514087e7 AH |
2301 | if ((retval = parse_weakblocks()) != 0) |
2302 | goto error; | |
2303 | ||
2304 | if ((retval = parse_weakpages()) != 0) | |
2305 | goto error; | |
2306 | ||
2307 | if ((retval = parse_gravepages()) != 0) | |
2308 | goto error; | |
2309 | ||
1c14fe21 RW |
2310 | nand_controller_init(&ns->base); |
2311 | ns->base.ops = &ns_controller_ops; | |
2312 | chip->controller = &ns->base; | |
2313 | ||
00ad378f | 2314 | retval = nand_scan(chip, 1); |
fc2ff592 | 2315 | if (retval) { |
5cbad9e3 | 2316 | NS_ERR("Could not scan NAND Simulator device\n"); |
1da177e4 LT |
2317 | goto error; |
2318 | } | |
2319 | ||
a5ac8aeb | 2320 | if (overridesize) { |
0f07a0be | 2321 | uint64_t new_size = (uint64_t)nsmtd->erasesize << overridesize; |
629a442c | 2322 | struct nand_memory_organization *memorg; |
6c836d51 | 2323 | u64 targetsize; |
629a442c BB |
2324 | |
2325 | memorg = nanddev_get_memorg(&chip->base); | |
2326 | ||
a5ac8aeb AH |
2327 | if (new_size >> overridesize != nsmtd->erasesize) { |
2328 | NS_ERR("overridesize is too big\n"); | |
bb0a13a1 | 2329 | retval = -EINVAL; |
a5ac8aeb AH |
2330 | goto err_exit; |
2331 | } | |
6c836d51 | 2332 | |
a5ac8aeb AH |
2333 | /* N.B. This relies on nand_scan not doing anything with the size before we change it */ |
2334 | nsmtd->size = new_size; | |
629a442c | 2335 | memorg->eraseblocks_per_lun = 1 << overridesize; |
6c836d51 | 2336 | targetsize = nanddev_target_size(&chip->base); |
6eda7a55 | 2337 | chip->chip_shift = ffs(nsmtd->erasesize) + overridesize - 1; |
6c836d51 | 2338 | chip->pagemask = (targetsize >> chip->page_shift) - 1; |
a5ac8aeb AH |
2339 | } |
2340 | ||
57aa6b54 AH |
2341 | if ((retval = setup_wear_reporting(nsmtd)) != 0) |
2342 | goto err_exit; | |
2343 | ||
2b77a0ed AH |
2344 | if ((retval = init_nandsim(nsmtd)) != 0) |
2345 | goto err_exit; | |
61b03bd7 | 2346 | |
e80eba75 | 2347 | if ((retval = nand_create_bbt(chip)) != 0) |
514087e7 AH |
2348 | goto err_exit; |
2349 | ||
74aee14c | 2350 | if ((retval = parse_badblocks(ns, nsmtd)) != 0) |
2b77a0ed | 2351 | goto err_exit; |
51502287 | 2352 | |
2b77a0ed | 2353 | /* Register NAND partitions */ |
74aee14c RW |
2354 | retval = mtd_device_register(nsmtd, &ns->partitions[0], |
2355 | ns->nbparts); | |
ee0e87b1 | 2356 | if (retval != 0) |
2b77a0ed | 2357 | goto err_exit; |
1da177e4 | 2358 | |
74aee14c | 2359 | if ((retval = nandsim_debugfs_create(ns)) != 0) |
e8e3edb9 MR |
2360 | goto err_exit; |
2361 | ||
1da177e4 LT |
2362 | return 0; |
2363 | ||
2b77a0ed | 2364 | err_exit: |
74aee14c | 2365 | free_nandsim(ns); |
59ac276f | 2366 | nand_release(chip); |
74aee14c RW |
2367 | for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i) |
2368 | kfree(ns->partitions[i].name); | |
1da177e4 | 2369 | error: |
74aee14c | 2370 | kfree(ns); |
514087e7 | 2371 | free_lists(); |
1da177e4 LT |
2372 | |
2373 | return retval; | |
2374 | } | |
2375 | ||
2376 | module_init(ns_init_module); | |
2377 | ||
2378 | /* | |
2379 | * Module clean-up function | |
2380 | */ | |
2381 | static void __exit ns_cleanup_module(void) | |
2382 | { | |
c66b651c BN |
2383 | struct nand_chip *chip = mtd_to_nand(nsmtd); |
2384 | struct nandsim *ns = nand_get_controller_data(chip); | |
2b77a0ed | 2385 | int i; |
1da177e4 LT |
2386 | |
2387 | free_nandsim(ns); /* Free nandsim private resources */ | |
59ac276f | 2388 | nand_release(chip); /* Unregister driver */ |
2b77a0ed AH |
2389 | for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i) |
2390 | kfree(ns->partitions[i].name); | |
74aee14c | 2391 | kfree(ns); /* Free other structures */ |
514087e7 | 2392 | free_lists(); |
1da177e4 LT |
2393 | } |
2394 | ||
2395 | module_exit(ns_cleanup_module); | |
2396 | ||
2397 | MODULE_LICENSE ("GPL"); | |
2398 | MODULE_AUTHOR ("Artem B. Bityuckiy"); | |
2399 | MODULE_DESCRIPTION ("The NAND flash simulator"); |