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 { | |
e99e90ae | 301 | struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS]; |
2b77a0ed | 302 | unsigned int nbparts; |
1da177e4 LT |
303 | |
304 | uint busw; /* flash chip bus width (8 or 16) */ | |
b00358a5 | 305 | u_char ids[8]; /* chip's ID bytes */ |
1da177e4 LT |
306 | uint32_t options; /* chip's characteristic bits */ |
307 | uint32_t state; /* current chip state */ | |
308 | uint32_t nxstate; /* next expected state */ | |
61b03bd7 | 309 | |
1da177e4 LT |
310 | uint32_t *op; /* current operation, NULL operations isn't known yet */ |
311 | uint32_t pstates[NS_MAX_PREVSTATES]; /* previous states */ | |
312 | uint16_t npstates; /* number of previous states saved */ | |
313 | uint16_t stateidx; /* current state index */ | |
314 | ||
d086d436 VK |
315 | /* The simulated NAND flash pages array */ |
316 | union ns_mem *pages; | |
1da177e4 | 317 | |
8a4c2495 AK |
318 | /* Slab allocator for nand pages */ |
319 | struct kmem_cache *nand_pages_slab; | |
320 | ||
1da177e4 | 321 | /* Internal buffer of page + OOB size bytes */ |
d086d436 | 322 | union ns_mem buf; |
1da177e4 LT |
323 | |
324 | /* NAND flash "geometry" */ | |
0bfa4df2 | 325 | struct { |
6eda7a55 | 326 | uint64_t totsz; /* total flash size, bytes */ |
1da177e4 LT |
327 | uint32_t secsz; /* flash sector (erase block) size, bytes */ |
328 | uint pgsz; /* NAND flash page size, bytes */ | |
329 | uint oobsz; /* page OOB area size, bytes */ | |
6eda7a55 | 330 | uint64_t totszoob; /* total flash size including OOB, bytes */ |
1da177e4 LT |
331 | uint pgszoob; /* page size including OOB , bytes*/ |
332 | uint secszoob; /* sector size including OOB, bytes */ | |
333 | uint pgnum; /* total number of pages */ | |
334 | uint pgsec; /* number of pages per sector */ | |
335 | uint secshift; /* bits number in sector size */ | |
336 | uint pgshift; /* bits number in page size */ | |
1da177e4 LT |
337 | uint pgaddrbytes; /* bytes per page address */ |
338 | uint secaddrbytes; /* bytes per sector address */ | |
339 | uint idbytes; /* the number ID bytes that this chip outputs */ | |
340 | } geom; | |
341 | ||
342 | /* NAND flash internal registers */ | |
0bfa4df2 | 343 | struct { |
1da177e4 LT |
344 | unsigned command; /* the command register */ |
345 | u_char status; /* the status register */ | |
346 | uint row; /* the page number */ | |
347 | uint column; /* the offset within page */ | |
348 | uint count; /* internal counter */ | |
349 | uint num; /* number of bytes which must be processed */ | |
350 | uint off; /* fixed page offset */ | |
351 | } regs; | |
352 | ||
353 | /* NAND flash lines state */ | |
0bfa4df2 | 354 | struct { |
1da177e4 LT |
355 | int ce; /* chip Enable */ |
356 | int cle; /* command Latch Enable */ | |
357 | int ale; /* address Latch Enable */ | |
358 | int wp; /* write Protect */ | |
359 | } lines; | |
a9fc8991 AH |
360 | |
361 | /* Fields needed when using a cache file */ | |
362 | struct file *cfile; /* Open file */ | |
08efe91a | 363 | unsigned long *pages_written; /* Which pages have been written */ |
a9fc8991 AH |
364 | void *file_buf; |
365 | struct page *held_pages[NS_MAX_HELD_PAGES]; | |
366 | int held_cnt; | |
1da177e4 LT |
367 | }; |
368 | ||
369 | /* | |
370 | * Operations array. To perform any operation the simulator must pass | |
371 | * through the correspondent states chain. | |
372 | */ | |
373 | static struct nandsim_operations { | |
374 | uint32_t reqopts; /* options which are required to perform the operation */ | |
375 | uint32_t states[NS_OPER_STATES]; /* operation's states */ | |
376 | } ops[NS_OPER_NUM] = { | |
377 | /* Read page + OOB from the beginning */ | |
378 | {OPT_SMALLPAGE, {STATE_CMD_READ0 | ACTION_ZEROOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
379 | STATE_DATAOUT, STATE_READY}}, | |
380 | /* Read page + OOB from the second half */ | |
381 | {OPT_PAGE512_8BIT, {STATE_CMD_READ1 | ACTION_HALFOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
382 | STATE_DATAOUT, STATE_READY}}, | |
383 | /* Read OOB */ | |
384 | {OPT_SMALLPAGE, {STATE_CMD_READOOB | ACTION_OOBOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
385 | STATE_DATAOUT, STATE_READY}}, | |
daf05ec0 | 386 | /* Program page starting from the beginning */ |
1da177e4 LT |
387 | {OPT_ANY, {STATE_CMD_SEQIN, STATE_ADDR_PAGE, STATE_DATAIN, |
388 | STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 389 | /* Program page starting from the beginning */ |
1da177e4 LT |
390 | {OPT_SMALLPAGE, {STATE_CMD_READ0, STATE_CMD_SEQIN | ACTION_ZEROOFF, STATE_ADDR_PAGE, |
391 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 392 | /* Program page starting from the second half */ |
1da177e4 LT |
393 | {OPT_PAGE512, {STATE_CMD_READ1, STATE_CMD_SEQIN | ACTION_HALFOFF, STATE_ADDR_PAGE, |
394 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
daf05ec0 | 395 | /* Program OOB */ |
1da177e4 LT |
396 | {OPT_SMALLPAGE, {STATE_CMD_READOOB, STATE_CMD_SEQIN | ACTION_OOBOFF, STATE_ADDR_PAGE, |
397 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
398 | /* Erase sector */ | |
399 | {OPT_ANY, {STATE_CMD_ERASE1, STATE_ADDR_SEC, STATE_CMD_ERASE2 | ACTION_SECERASE, STATE_READY}}, | |
400 | /* Read status */ | |
401 | {OPT_ANY, {STATE_CMD_STATUS, STATE_DATAOUT_STATUS, STATE_READY}}, | |
1da177e4 LT |
402 | /* Read ID */ |
403 | {OPT_ANY, {STATE_CMD_READID, STATE_ADDR_ZERO, STATE_DATAOUT_ID, STATE_READY}}, | |
404 | /* Large page devices read page */ | |
405 | {OPT_LARGEPAGE, {STATE_CMD_READ0, STATE_ADDR_PAGE, STATE_CMD_READSTART | ACTION_CPY, | |
74216be4 AB |
406 | STATE_DATAOUT, STATE_READY}}, |
407 | /* Large page devices random page read */ | |
408 | {OPT_LARGEPAGE, {STATE_CMD_RNDOUT, STATE_ADDR_COLUMN, STATE_CMD_RNDOUTSTART | ACTION_CPY, | |
409 | STATE_DATAOUT, STATE_READY}}, | |
1da177e4 LT |
410 | }; |
411 | ||
514087e7 AH |
412 | struct weak_block { |
413 | struct list_head list; | |
414 | unsigned int erase_block_no; | |
415 | unsigned int max_erases; | |
416 | unsigned int erases_done; | |
417 | }; | |
418 | ||
419 | static LIST_HEAD(weak_blocks); | |
420 | ||
421 | struct weak_page { | |
422 | struct list_head list; | |
423 | unsigned int page_no; | |
424 | unsigned int max_writes; | |
425 | unsigned int writes_done; | |
426 | }; | |
427 | ||
428 | static LIST_HEAD(weak_pages); | |
429 | ||
430 | struct grave_page { | |
431 | struct list_head list; | |
432 | unsigned int page_no; | |
433 | unsigned int max_reads; | |
434 | unsigned int reads_done; | |
435 | }; | |
436 | ||
437 | static LIST_HEAD(grave_pages); | |
438 | ||
57aa6b54 AH |
439 | static unsigned long *erase_block_wear = NULL; |
440 | static unsigned int wear_eb_count = 0; | |
441 | static unsigned long total_wear = 0; | |
57aa6b54 | 442 | |
1da177e4 LT |
443 | /* MTD structure for NAND controller */ |
444 | static struct mtd_info *nsmtd; | |
445 | ||
5346c27c EG |
446 | static int nandsim_debugfs_show(struct seq_file *m, void *private) |
447 | { | |
448 | unsigned long wmin = -1, wmax = 0, avg; | |
449 | unsigned long deciles[10], decile_max[10], tot = 0; | |
450 | unsigned int i; | |
451 | ||
452 | /* Calc wear stats */ | |
453 | for (i = 0; i < wear_eb_count; ++i) { | |
454 | unsigned long wear = erase_block_wear[i]; | |
455 | if (wear < wmin) | |
456 | wmin = wear; | |
457 | if (wear > wmax) | |
458 | wmax = wear; | |
459 | tot += wear; | |
460 | } | |
461 | ||
462 | for (i = 0; i < 9; ++i) { | |
463 | deciles[i] = 0; | |
464 | decile_max[i] = (wmax * (i + 1) + 5) / 10; | |
465 | } | |
466 | deciles[9] = 0; | |
467 | decile_max[9] = wmax; | |
468 | for (i = 0; i < wear_eb_count; ++i) { | |
469 | int d; | |
470 | unsigned long wear = erase_block_wear[i]; | |
471 | for (d = 0; d < 10; ++d) | |
472 | if (wear <= decile_max[d]) { | |
473 | deciles[d] += 1; | |
474 | break; | |
475 | } | |
476 | } | |
477 | avg = tot / wear_eb_count; | |
478 | ||
479 | /* Output wear report */ | |
480 | seq_printf(m, "Total numbers of erases: %lu\n", tot); | |
481 | seq_printf(m, "Number of erase blocks: %u\n", wear_eb_count); | |
482 | seq_printf(m, "Average number of erases: %lu\n", avg); | |
483 | seq_printf(m, "Maximum number of erases: %lu\n", wmax); | |
484 | seq_printf(m, "Minimum number of erases: %lu\n", wmin); | |
485 | for (i = 0; i < 10; ++i) { | |
486 | unsigned long from = (i ? decile_max[i - 1] + 1 : 0); | |
487 | if (from > decile_max[i]) | |
488 | continue; | |
489 | seq_printf(m, "Number of ebs with erase counts from %lu to %lu : %lu\n", | |
490 | from, | |
491 | decile_max[i], | |
492 | deciles[i]); | |
493 | } | |
494 | ||
495 | return 0; | |
496 | } | |
497 | ||
498 | static int nandsim_debugfs_open(struct inode *inode, struct file *file) | |
499 | { | |
500 | return single_open(file, nandsim_debugfs_show, inode->i_private); | |
501 | } | |
502 | ||
503 | static const struct file_operations dfs_fops = { | |
504 | .open = nandsim_debugfs_open, | |
505 | .read = seq_read, | |
506 | .llseek = seq_lseek, | |
507 | .release = single_release, | |
508 | }; | |
509 | ||
510 | /** | |
511 | * nandsim_debugfs_create - initialize debugfs | |
512 | * @dev: nandsim device description object | |
513 | * | |
514 | * This function creates all debugfs files for UBI device @ubi. Returns zero in | |
515 | * case of success and a negative error code in case of failure. | |
516 | */ | |
517 | static int nandsim_debugfs_create(struct nandsim *dev) | |
518 | { | |
e8e3edb9 | 519 | struct dentry *root = nsmtd->dbg.dfs_dir; |
5346c27c | 520 | struct dentry *dent; |
5346c27c | 521 | |
1530578a BB |
522 | /* |
523 | * Just skip debugfs initialization when the debugfs directory is | |
524 | * missing. | |
525 | */ | |
526 | if (IS_ERR_OR_NULL(root)) { | |
527 | if (IS_ENABLED(CONFIG_DEBUG_FS) && | |
528 | !IS_ENABLED(CONFIG_MTD_PARTITIONED_MASTER)) | |
529 | NS_WARN("CONFIG_MTD_PARTITIONED_MASTER must be enabled to expose debugfs stuff\n"); | |
5346c27c | 530 | return 0; |
1530578a | 531 | } |
5346c27c | 532 | |
e8e3edb9 MR |
533 | dent = debugfs_create_file("nandsim_wear_report", S_IRUSR, |
534 | root, dev, &dfs_fops); | |
535 | if (IS_ERR_OR_NULL(dent)) { | |
536 | NS_ERR("cannot create \"nandsim_wear_report\" debugfs entry\n"); | |
537 | return -1; | |
538 | } | |
5346c27c EG |
539 | |
540 | return 0; | |
5346c27c EG |
541 | } |
542 | ||
d086d436 | 543 | /* |
8a4c2495 AK |
544 | * Allocate array of page pointers, create slab allocation for an array |
545 | * and initialize the array by NULL pointers. | |
d086d436 VK |
546 | * |
547 | * RETURNS: 0 if success, -ENOMEM if memory alloc fails. | |
548 | */ | |
77784785 | 549 | static int __init alloc_device(struct nandsim *ns) |
d086d436 | 550 | { |
a9fc8991 AH |
551 | struct file *cfile; |
552 | int i, err; | |
553 | ||
554 | if (cache_file) { | |
555 | cfile = filp_open(cache_file, O_CREAT | O_RDWR | O_LARGEFILE, 0600); | |
556 | if (IS_ERR(cfile)) | |
557 | return PTR_ERR(cfile); | |
7f7f25e8 | 558 | if (!(cfile->f_mode & FMODE_CAN_READ)) { |
a9fc8991 AH |
559 | NS_ERR("alloc_device: cache file not readable\n"); |
560 | err = -EINVAL; | |
561 | goto err_close; | |
562 | } | |
7f7f25e8 | 563 | if (!(cfile->f_mode & FMODE_CAN_WRITE)) { |
a9fc8991 AH |
564 | NS_ERR("alloc_device: cache file not writeable\n"); |
565 | err = -EINVAL; | |
566 | goto err_close; | |
567 | } | |
fad953ce KC |
568 | ns->pages_written = |
569 | vzalloc(array_size(sizeof(unsigned long), | |
570 | BITS_TO_LONGS(ns->geom.pgnum))); | |
a9fc8991 AH |
571 | if (!ns->pages_written) { |
572 | NS_ERR("alloc_device: unable to allocate pages written array\n"); | |
573 | err = -ENOMEM; | |
574 | goto err_close; | |
575 | } | |
576 | ns->file_buf = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
577 | if (!ns->file_buf) { | |
578 | NS_ERR("alloc_device: unable to allocate file buf\n"); | |
579 | err = -ENOMEM; | |
580 | goto err_free; | |
581 | } | |
582 | ns->cfile = cfile; | |
a9fc8991 AH |
583 | return 0; |
584 | } | |
d086d436 | 585 | |
42bc47b3 | 586 | ns->pages = vmalloc(array_size(sizeof(union ns_mem), ns->geom.pgnum)); |
d086d436 | 587 | if (!ns->pages) { |
a9fc8991 | 588 | NS_ERR("alloc_device: unable to allocate page array\n"); |
d086d436 VK |
589 | return -ENOMEM; |
590 | } | |
591 | for (i = 0; i < ns->geom.pgnum; i++) { | |
592 | ns->pages[i].byte = NULL; | |
593 | } | |
8a4c2495 AK |
594 | ns->nand_pages_slab = kmem_cache_create("nandsim", |
595 | ns->geom.pgszoob, 0, 0, NULL); | |
596 | if (!ns->nand_pages_slab) { | |
597 | NS_ERR("cache_create: unable to create kmem_cache\n"); | |
598 | return -ENOMEM; | |
599 | } | |
d086d436 VK |
600 | |
601 | return 0; | |
a9fc8991 AH |
602 | |
603 | err_free: | |
604 | vfree(ns->pages_written); | |
605 | err_close: | |
606 | filp_close(cfile, NULL); | |
607 | return err; | |
d086d436 VK |
608 | } |
609 | ||
610 | /* | |
611 | * Free any allocated pages, and free the array of page pointers. | |
612 | */ | |
a5602146 | 613 | static void free_device(struct nandsim *ns) |
d086d436 VK |
614 | { |
615 | int i; | |
616 | ||
a9fc8991 AH |
617 | if (ns->cfile) { |
618 | kfree(ns->file_buf); | |
619 | vfree(ns->pages_written); | |
620 | filp_close(ns->cfile, NULL); | |
621 | return; | |
622 | } | |
623 | ||
d086d436 VK |
624 | if (ns->pages) { |
625 | for (i = 0; i < ns->geom.pgnum; i++) { | |
626 | if (ns->pages[i].byte) | |
8a4c2495 AK |
627 | kmem_cache_free(ns->nand_pages_slab, |
628 | ns->pages[i].byte); | |
d086d436 | 629 | } |
0791a5f8 | 630 | kmem_cache_destroy(ns->nand_pages_slab); |
d086d436 VK |
631 | vfree(ns->pages); |
632 | } | |
633 | } | |
634 | ||
77784785 | 635 | static char __init *get_partition_name(int i) |
2b77a0ed | 636 | { |
f03a5729 | 637 | return kasprintf(GFP_KERNEL, "NAND simulator partition %d", i); |
2b77a0ed AH |
638 | } |
639 | ||
1da177e4 LT |
640 | /* |
641 | * Initialize the nandsim structure. | |
642 | * | |
643 | * RETURNS: 0 if success, -ERRNO if failure. | |
644 | */ | |
77784785 | 645 | static int __init init_nandsim(struct mtd_info *mtd) |
1da177e4 | 646 | { |
862eba51 | 647 | struct nand_chip *chip = mtd_to_nand(mtd); |
d699ed25 | 648 | struct nandsim *ns = nand_get_controller_data(chip); |
2b77a0ed | 649 | int i, ret = 0; |
0f07a0be DW |
650 | uint64_t remains; |
651 | uint64_t next_offset; | |
1da177e4 LT |
652 | |
653 | if (NS_IS_INITIALIZED(ns)) { | |
654 | NS_ERR("init_nandsim: nandsim is already initialized\n"); | |
655 | return -EIO; | |
656 | } | |
657 | ||
658 | /* Force mtd to not do delays */ | |
659 | chip->chip_delay = 0; | |
660 | ||
661 | /* Initialize the NAND flash parameters */ | |
662 | ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8; | |
663 | ns->geom.totsz = mtd->size; | |
28318776 | 664 | ns->geom.pgsz = mtd->writesize; |
1da177e4 LT |
665 | ns->geom.oobsz = mtd->oobsize; |
666 | ns->geom.secsz = mtd->erasesize; | |
667 | ns->geom.pgszoob = ns->geom.pgsz + ns->geom.oobsz; | |
596fd462 | 668 | ns->geom.pgnum = div_u64(ns->geom.totsz, ns->geom.pgsz); |
6eda7a55 | 669 | ns->geom.totszoob = ns->geom.totsz + (uint64_t)ns->geom.pgnum * ns->geom.oobsz; |
1da177e4 LT |
670 | ns->geom.secshift = ffs(ns->geom.secsz) - 1; |
671 | ns->geom.pgshift = chip->page_shift; | |
1da177e4 LT |
672 | ns->geom.pgsec = ns->geom.secsz / ns->geom.pgsz; |
673 | ns->geom.secszoob = ns->geom.secsz + ns->geom.oobsz * ns->geom.pgsec; | |
674 | ns->options = 0; | |
675 | ||
51148f1f | 676 | if (ns->geom.pgsz == 512) { |
831d316b | 677 | ns->options |= OPT_PAGE512; |
1da177e4 LT |
678 | if (ns->busw == 8) |
679 | ns->options |= OPT_PAGE512_8BIT; | |
680 | } else if (ns->geom.pgsz == 2048) { | |
681 | ns->options |= OPT_PAGE2048; | |
75352662 SAS |
682 | } else if (ns->geom.pgsz == 4096) { |
683 | ns->options |= OPT_PAGE4096; | |
1da177e4 LT |
684 | } else { |
685 | NS_ERR("init_nandsim: unknown page size %u\n", ns->geom.pgsz); | |
686 | return -EIO; | |
687 | } | |
688 | ||
689 | if (ns->options & OPT_SMALLPAGE) { | |
af3deccf | 690 | if (ns->geom.totsz <= (32 << 20)) { |
1da177e4 LT |
691 | ns->geom.pgaddrbytes = 3; |
692 | ns->geom.secaddrbytes = 2; | |
693 | } else { | |
694 | ns->geom.pgaddrbytes = 4; | |
695 | ns->geom.secaddrbytes = 3; | |
696 | } | |
697 | } else { | |
698 | if (ns->geom.totsz <= (128 << 20)) { | |
4a0c50c0 | 699 | ns->geom.pgaddrbytes = 4; |
1da177e4 LT |
700 | ns->geom.secaddrbytes = 2; |
701 | } else { | |
702 | ns->geom.pgaddrbytes = 5; | |
703 | ns->geom.secaddrbytes = 3; | |
704 | } | |
705 | } | |
61b03bd7 | 706 | |
2b77a0ed AH |
707 | /* Fill the partition_info structure */ |
708 | if (parts_num > ARRAY_SIZE(ns->partitions)) { | |
709 | NS_ERR("too many partitions.\n"); | |
5891a8d1 | 710 | return -EINVAL; |
2b77a0ed AH |
711 | } |
712 | remains = ns->geom.totsz; | |
713 | next_offset = 0; | |
714 | for (i = 0; i < parts_num; ++i) { | |
0f07a0be | 715 | uint64_t part_sz = (uint64_t)parts[i] * ns->geom.secsz; |
6eda7a55 AH |
716 | |
717 | if (!part_sz || part_sz > remains) { | |
2b77a0ed | 718 | NS_ERR("bad partition size.\n"); |
5891a8d1 | 719 | return -EINVAL; |
2b77a0ed AH |
720 | } |
721 | ns->partitions[i].name = get_partition_name(i); | |
641c7925 RW |
722 | if (!ns->partitions[i].name) { |
723 | NS_ERR("unable to allocate memory.\n"); | |
5891a8d1 | 724 | return -ENOMEM; |
641c7925 | 725 | } |
2b77a0ed | 726 | ns->partitions[i].offset = next_offset; |
6eda7a55 | 727 | ns->partitions[i].size = part_sz; |
2b77a0ed AH |
728 | next_offset += ns->partitions[i].size; |
729 | remains -= ns->partitions[i].size; | |
730 | } | |
731 | ns->nbparts = parts_num; | |
732 | if (remains) { | |
733 | if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) { | |
734 | NS_ERR("too many partitions.\n"); | |
5891a8d1 | 735 | return -EINVAL; |
2b77a0ed AH |
736 | } |
737 | ns->partitions[i].name = get_partition_name(i); | |
641c7925 RW |
738 | if (!ns->partitions[i].name) { |
739 | NS_ERR("unable to allocate memory.\n"); | |
5891a8d1 | 740 | return -ENOMEM; |
641c7925 | 741 | } |
2b77a0ed AH |
742 | ns->partitions[i].offset = next_offset; |
743 | ns->partitions[i].size = remains; | |
744 | ns->nbparts += 1; | |
745 | } | |
746 | ||
1da177e4 LT |
747 | if (ns->busw == 16) |
748 | NS_WARN("16-bit flashes support wasn't tested\n"); | |
749 | ||
e4c094a5 AM |
750 | printk("flash size: %llu MiB\n", |
751 | (unsigned long long)ns->geom.totsz >> 20); | |
1da177e4 LT |
752 | printk("page size: %u bytes\n", ns->geom.pgsz); |
753 | printk("OOB area size: %u bytes\n", ns->geom.oobsz); | |
754 | printk("sector size: %u KiB\n", ns->geom.secsz >> 10); | |
755 | printk("pages number: %u\n", ns->geom.pgnum); | |
756 | printk("pages per sector: %u\n", ns->geom.pgsec); | |
757 | printk("bus width: %u\n", ns->busw); | |
758 | printk("bits in sector size: %u\n", ns->geom.secshift); | |
759 | printk("bits in page size: %u\n", ns->geom.pgshift); | |
2f3b07a7 | 760 | printk("bits in OOB size: %u\n", ffs(ns->geom.oobsz) - 1); |
e4c094a5 AM |
761 | printk("flash size with OOB: %llu KiB\n", |
762 | (unsigned long long)ns->geom.totszoob >> 10); | |
1da177e4 LT |
763 | printk("page address bytes: %u\n", ns->geom.pgaddrbytes); |
764 | printk("sector address bytes: %u\n", ns->geom.secaddrbytes); | |
765 | printk("options: %#x\n", ns->options); | |
766 | ||
2b77a0ed | 767 | if ((ret = alloc_device(ns)) != 0) |
5891a8d1 | 768 | return ret; |
1da177e4 LT |
769 | |
770 | /* Allocate / initialize the internal buffer */ | |
771 | ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
772 | if (!ns->buf.byte) { | |
773 | NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n", | |
774 | ns->geom.pgszoob); | |
5891a8d1 | 775 | return -ENOMEM; |
1da177e4 LT |
776 | } |
777 | memset(ns->buf.byte, 0xFF, ns->geom.pgszoob); | |
778 | ||
1da177e4 | 779 | return 0; |
1da177e4 LT |
780 | } |
781 | ||
782 | /* | |
783 | * Free the nandsim structure. | |
784 | */ | |
a5602146 | 785 | static void free_nandsim(struct nandsim *ns) |
1da177e4 LT |
786 | { |
787 | kfree(ns->buf.byte); | |
d086d436 | 788 | free_device(ns); |
1da177e4 LT |
789 | |
790 | return; | |
791 | } | |
792 | ||
514087e7 AH |
793 | static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) |
794 | { | |
795 | char *w; | |
796 | int zero_ok; | |
797 | unsigned int erase_block_no; | |
798 | loff_t offset; | |
799 | ||
800 | if (!badblocks) | |
801 | return 0; | |
802 | w = badblocks; | |
803 | do { | |
804 | zero_ok = (*w == '0' ? 1 : 0); | |
805 | erase_block_no = simple_strtoul(w, &w, 0); | |
806 | if (!zero_ok && !erase_block_no) { | |
807 | NS_ERR("invalid badblocks.\n"); | |
808 | return -EINVAL; | |
809 | } | |
b033e1aa | 810 | offset = (loff_t)erase_block_no * ns->geom.secsz; |
5942ddbc | 811 | if (mtd_block_markbad(mtd, offset)) { |
514087e7 AH |
812 | NS_ERR("invalid badblocks.\n"); |
813 | return -EINVAL; | |
814 | } | |
815 | if (*w == ',') | |
816 | w += 1; | |
817 | } while (*w); | |
818 | return 0; | |
819 | } | |
820 | ||
821 | static int parse_weakblocks(void) | |
822 | { | |
823 | char *w; | |
824 | int zero_ok; | |
825 | unsigned int erase_block_no; | |
826 | unsigned int max_erases; | |
827 | struct weak_block *wb; | |
828 | ||
829 | if (!weakblocks) | |
830 | return 0; | |
831 | w = weakblocks; | |
832 | do { | |
833 | zero_ok = (*w == '0' ? 1 : 0); | |
834 | erase_block_no = simple_strtoul(w, &w, 0); | |
835 | if (!zero_ok && !erase_block_no) { | |
836 | NS_ERR("invalid weakblocks.\n"); | |
837 | return -EINVAL; | |
838 | } | |
839 | max_erases = 3; | |
840 | if (*w == ':') { | |
841 | w += 1; | |
842 | max_erases = simple_strtoul(w, &w, 0); | |
843 | } | |
844 | if (*w == ',') | |
845 | w += 1; | |
846 | wb = kzalloc(sizeof(*wb), GFP_KERNEL); | |
847 | if (!wb) { | |
848 | NS_ERR("unable to allocate memory.\n"); | |
849 | return -ENOMEM; | |
850 | } | |
851 | wb->erase_block_no = erase_block_no; | |
852 | wb->max_erases = max_erases; | |
853 | list_add(&wb->list, &weak_blocks); | |
854 | } while (*w); | |
855 | return 0; | |
856 | } | |
857 | ||
858 | static int erase_error(unsigned int erase_block_no) | |
859 | { | |
860 | struct weak_block *wb; | |
861 | ||
862 | list_for_each_entry(wb, &weak_blocks, list) | |
863 | if (wb->erase_block_no == erase_block_no) { | |
864 | if (wb->erases_done >= wb->max_erases) | |
865 | return 1; | |
866 | wb->erases_done += 1; | |
867 | return 0; | |
868 | } | |
869 | return 0; | |
870 | } | |
871 | ||
872 | static int parse_weakpages(void) | |
873 | { | |
874 | char *w; | |
875 | int zero_ok; | |
876 | unsigned int page_no; | |
877 | unsigned int max_writes; | |
878 | struct weak_page *wp; | |
879 | ||
880 | if (!weakpages) | |
881 | return 0; | |
882 | w = weakpages; | |
883 | do { | |
884 | zero_ok = (*w == '0' ? 1 : 0); | |
885 | page_no = simple_strtoul(w, &w, 0); | |
886 | if (!zero_ok && !page_no) { | |
215157fb | 887 | NS_ERR("invalid weakpages.\n"); |
514087e7 AH |
888 | return -EINVAL; |
889 | } | |
890 | max_writes = 3; | |
891 | if (*w == ':') { | |
892 | w += 1; | |
893 | max_writes = simple_strtoul(w, &w, 0); | |
894 | } | |
895 | if (*w == ',') | |
896 | w += 1; | |
897 | wp = kzalloc(sizeof(*wp), GFP_KERNEL); | |
898 | if (!wp) { | |
899 | NS_ERR("unable to allocate memory.\n"); | |
900 | return -ENOMEM; | |
901 | } | |
902 | wp->page_no = page_no; | |
903 | wp->max_writes = max_writes; | |
904 | list_add(&wp->list, &weak_pages); | |
905 | } while (*w); | |
906 | return 0; | |
907 | } | |
908 | ||
909 | static int write_error(unsigned int page_no) | |
910 | { | |
911 | struct weak_page *wp; | |
912 | ||
913 | list_for_each_entry(wp, &weak_pages, list) | |
914 | if (wp->page_no == page_no) { | |
915 | if (wp->writes_done >= wp->max_writes) | |
916 | return 1; | |
917 | wp->writes_done += 1; | |
918 | return 0; | |
919 | } | |
920 | return 0; | |
921 | } | |
922 | ||
923 | static int parse_gravepages(void) | |
924 | { | |
925 | char *g; | |
926 | int zero_ok; | |
927 | unsigned int page_no; | |
928 | unsigned int max_reads; | |
929 | struct grave_page *gp; | |
930 | ||
931 | if (!gravepages) | |
932 | return 0; | |
933 | g = gravepages; | |
934 | do { | |
935 | zero_ok = (*g == '0' ? 1 : 0); | |
936 | page_no = simple_strtoul(g, &g, 0); | |
937 | if (!zero_ok && !page_no) { | |
938 | NS_ERR("invalid gravepagess.\n"); | |
939 | return -EINVAL; | |
940 | } | |
941 | max_reads = 3; | |
942 | if (*g == ':') { | |
943 | g += 1; | |
944 | max_reads = simple_strtoul(g, &g, 0); | |
945 | } | |
946 | if (*g == ',') | |
947 | g += 1; | |
948 | gp = kzalloc(sizeof(*gp), GFP_KERNEL); | |
949 | if (!gp) { | |
950 | NS_ERR("unable to allocate memory.\n"); | |
951 | return -ENOMEM; | |
952 | } | |
953 | gp->page_no = page_no; | |
954 | gp->max_reads = max_reads; | |
955 | list_add(&gp->list, &grave_pages); | |
956 | } while (*g); | |
957 | return 0; | |
958 | } | |
959 | ||
960 | static int read_error(unsigned int page_no) | |
961 | { | |
962 | struct grave_page *gp; | |
963 | ||
964 | list_for_each_entry(gp, &grave_pages, list) | |
965 | if (gp->page_no == page_no) { | |
966 | if (gp->reads_done >= gp->max_reads) | |
967 | return 1; | |
968 | gp->reads_done += 1; | |
969 | return 0; | |
970 | } | |
971 | return 0; | |
972 | } | |
973 | ||
974 | static void free_lists(void) | |
975 | { | |
976 | struct list_head *pos, *n; | |
977 | list_for_each_safe(pos, n, &weak_blocks) { | |
978 | list_del(pos); | |
979 | kfree(list_entry(pos, struct weak_block, list)); | |
980 | } | |
981 | list_for_each_safe(pos, n, &weak_pages) { | |
982 | list_del(pos); | |
983 | kfree(list_entry(pos, struct weak_page, list)); | |
984 | } | |
985 | list_for_each_safe(pos, n, &grave_pages) { | |
986 | list_del(pos); | |
987 | kfree(list_entry(pos, struct grave_page, list)); | |
988 | } | |
57aa6b54 AH |
989 | kfree(erase_block_wear); |
990 | } | |
991 | ||
992 | static int setup_wear_reporting(struct mtd_info *mtd) | |
993 | { | |
994 | size_t mem; | |
995 | ||
596fd462 | 996 | wear_eb_count = div_u64(mtd->size, mtd->erasesize); |
57aa6b54 AH |
997 | mem = wear_eb_count * sizeof(unsigned long); |
998 | if (mem / sizeof(unsigned long) != wear_eb_count) { | |
999 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
1000 | return -ENOMEM; | |
1001 | } | |
1002 | erase_block_wear = kzalloc(mem, GFP_KERNEL); | |
1003 | if (!erase_block_wear) { | |
1004 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
1005 | return -ENOMEM; | |
1006 | } | |
1007 | return 0; | |
1008 | } | |
1009 | ||
1010 | static void update_wear(unsigned int erase_block_no) | |
1011 | { | |
57aa6b54 AH |
1012 | if (!erase_block_wear) |
1013 | return; | |
1014 | total_wear += 1; | |
5346c27c EG |
1015 | /* |
1016 | * TODO: Notify this through a debugfs entry, | |
1017 | * instead of showing an error message. | |
1018 | */ | |
57aa6b54 AH |
1019 | if (total_wear == 0) |
1020 | NS_ERR("Erase counter total overflow\n"); | |
1021 | erase_block_wear[erase_block_no] += 1; | |
1022 | if (erase_block_wear[erase_block_no] == 0) | |
1023 | NS_ERR("Erase counter overflow for erase block %u\n", erase_block_no); | |
514087e7 AH |
1024 | } |
1025 | ||
1da177e4 LT |
1026 | /* |
1027 | * Returns the string representation of 'state' state. | |
1028 | */ | |
a5602146 | 1029 | static char *get_state_name(uint32_t state) |
1da177e4 LT |
1030 | { |
1031 | switch (NS_STATE(state)) { | |
1032 | case STATE_CMD_READ0: | |
1033 | return "STATE_CMD_READ0"; | |
1034 | case STATE_CMD_READ1: | |
1035 | return "STATE_CMD_READ1"; | |
1036 | case STATE_CMD_PAGEPROG: | |
1037 | return "STATE_CMD_PAGEPROG"; | |
1038 | case STATE_CMD_READOOB: | |
1039 | return "STATE_CMD_READOOB"; | |
1040 | case STATE_CMD_READSTART: | |
1041 | return "STATE_CMD_READSTART"; | |
1042 | case STATE_CMD_ERASE1: | |
1043 | return "STATE_CMD_ERASE1"; | |
1044 | case STATE_CMD_STATUS: | |
1045 | return "STATE_CMD_STATUS"; | |
1da177e4 LT |
1046 | case STATE_CMD_SEQIN: |
1047 | return "STATE_CMD_SEQIN"; | |
1048 | case STATE_CMD_READID: | |
1049 | return "STATE_CMD_READID"; | |
1050 | case STATE_CMD_ERASE2: | |
1051 | return "STATE_CMD_ERASE2"; | |
1052 | case STATE_CMD_RESET: | |
1053 | return "STATE_CMD_RESET"; | |
74216be4 AB |
1054 | case STATE_CMD_RNDOUT: |
1055 | return "STATE_CMD_RNDOUT"; | |
1056 | case STATE_CMD_RNDOUTSTART: | |
1057 | return "STATE_CMD_RNDOUTSTART"; | |
1da177e4 LT |
1058 | case STATE_ADDR_PAGE: |
1059 | return "STATE_ADDR_PAGE"; | |
1060 | case STATE_ADDR_SEC: | |
1061 | return "STATE_ADDR_SEC"; | |
1062 | case STATE_ADDR_ZERO: | |
1063 | return "STATE_ADDR_ZERO"; | |
74216be4 AB |
1064 | case STATE_ADDR_COLUMN: |
1065 | return "STATE_ADDR_COLUMN"; | |
1da177e4 LT |
1066 | case STATE_DATAIN: |
1067 | return "STATE_DATAIN"; | |
1068 | case STATE_DATAOUT: | |
1069 | return "STATE_DATAOUT"; | |
1070 | case STATE_DATAOUT_ID: | |
1071 | return "STATE_DATAOUT_ID"; | |
1072 | case STATE_DATAOUT_STATUS: | |
1073 | return "STATE_DATAOUT_STATUS"; | |
1da177e4 LT |
1074 | case STATE_READY: |
1075 | return "STATE_READY"; | |
1076 | case STATE_UNKNOWN: | |
1077 | return "STATE_UNKNOWN"; | |
1078 | } | |
1079 | ||
1080 | NS_ERR("get_state_name: unknown state, BUG\n"); | |
1081 | return NULL; | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * Check if command is valid. | |
1086 | * | |
1087 | * RETURNS: 1 if wrong command, 0 if right. | |
1088 | */ | |
a5602146 | 1089 | static int check_command(int cmd) |
1da177e4 LT |
1090 | { |
1091 | switch (cmd) { | |
61b03bd7 | 1092 | |
1da177e4 | 1093 | case NAND_CMD_READ0: |
74216be4 | 1094 | case NAND_CMD_READ1: |
1da177e4 LT |
1095 | case NAND_CMD_READSTART: |
1096 | case NAND_CMD_PAGEPROG: | |
1097 | case NAND_CMD_READOOB: | |
1098 | case NAND_CMD_ERASE1: | |
1099 | case NAND_CMD_STATUS: | |
1100 | case NAND_CMD_SEQIN: | |
1101 | case NAND_CMD_READID: | |
1102 | case NAND_CMD_ERASE2: | |
1103 | case NAND_CMD_RESET: | |
74216be4 AB |
1104 | case NAND_CMD_RNDOUT: |
1105 | case NAND_CMD_RNDOUTSTART: | |
1da177e4 | 1106 | return 0; |
61b03bd7 | 1107 | |
1da177e4 LT |
1108 | default: |
1109 | return 1; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /* | |
1114 | * Returns state after command is accepted by command number. | |
1115 | */ | |
a5602146 | 1116 | static uint32_t get_state_by_command(unsigned command) |
1da177e4 LT |
1117 | { |
1118 | switch (command) { | |
1119 | case NAND_CMD_READ0: | |
1120 | return STATE_CMD_READ0; | |
1121 | case NAND_CMD_READ1: | |
1122 | return STATE_CMD_READ1; | |
1123 | case NAND_CMD_PAGEPROG: | |
1124 | return STATE_CMD_PAGEPROG; | |
1125 | case NAND_CMD_READSTART: | |
1126 | return STATE_CMD_READSTART; | |
1127 | case NAND_CMD_READOOB: | |
1128 | return STATE_CMD_READOOB; | |
1129 | case NAND_CMD_ERASE1: | |
1130 | return STATE_CMD_ERASE1; | |
1131 | case NAND_CMD_STATUS: | |
1132 | return STATE_CMD_STATUS; | |
1da177e4 LT |
1133 | case NAND_CMD_SEQIN: |
1134 | return STATE_CMD_SEQIN; | |
1135 | case NAND_CMD_READID: | |
1136 | return STATE_CMD_READID; | |
1137 | case NAND_CMD_ERASE2: | |
1138 | return STATE_CMD_ERASE2; | |
1139 | case NAND_CMD_RESET: | |
1140 | return STATE_CMD_RESET; | |
74216be4 AB |
1141 | case NAND_CMD_RNDOUT: |
1142 | return STATE_CMD_RNDOUT; | |
1143 | case NAND_CMD_RNDOUTSTART: | |
1144 | return STATE_CMD_RNDOUTSTART; | |
1da177e4 LT |
1145 | } |
1146 | ||
1147 | NS_ERR("get_state_by_command: unknown command, BUG\n"); | |
1148 | return 0; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | * Move an address byte to the correspondent internal register. | |
1153 | */ | |
a5602146 | 1154 | static inline void accept_addr_byte(struct nandsim *ns, u_char bt) |
1da177e4 LT |
1155 | { |
1156 | uint byte = (uint)bt; | |
61b03bd7 | 1157 | |
1da177e4 LT |
1158 | if (ns->regs.count < (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) |
1159 | ns->regs.column |= (byte << 8 * ns->regs.count); | |
1160 | else { | |
1161 | ns->regs.row |= (byte << 8 * (ns->regs.count - | |
1162 | ns->geom.pgaddrbytes + | |
1163 | ns->geom.secaddrbytes)); | |
1164 | } | |
1165 | ||
1166 | return; | |
1167 | } | |
61b03bd7 | 1168 | |
1da177e4 LT |
1169 | /* |
1170 | * Switch to STATE_READY state. | |
1171 | */ | |
a5602146 | 1172 | static inline void switch_to_ready_state(struct nandsim *ns, u_char status) |
1da177e4 LT |
1173 | { |
1174 | NS_DBG("switch_to_ready_state: switch to %s state\n", get_state_name(STATE_READY)); | |
1175 | ||
1176 | ns->state = STATE_READY; | |
1177 | ns->nxstate = STATE_UNKNOWN; | |
1178 | ns->op = NULL; | |
1179 | ns->npstates = 0; | |
1180 | ns->stateidx = 0; | |
1181 | ns->regs.num = 0; | |
1182 | ns->regs.count = 0; | |
1183 | ns->regs.off = 0; | |
1184 | ns->regs.row = 0; | |
1185 | ns->regs.column = 0; | |
1186 | ns->regs.status = status; | |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | * If the operation isn't known yet, try to find it in the global array | |
1191 | * of supported operations. | |
1192 | * | |
1193 | * Operation can be unknown because of the following. | |
daf05ec0 | 1194 | * 1. New command was accepted and this is the first call to find the |
1da177e4 | 1195 | * correspondent states chain. In this case ns->npstates = 0; |
daf05ec0 | 1196 | * 2. There are several operations which begin with the same command(s) |
1da177e4 LT |
1197 | * (for example program from the second half and read from the |
1198 | * second half operations both begin with the READ1 command). In this | |
1199 | * case the ns->pstates[] array contains previous states. | |
61b03bd7 | 1200 | * |
1da177e4 LT |
1201 | * Thus, the function tries to find operation containing the following |
1202 | * states (if the 'flag' parameter is 0): | |
1203 | * ns->pstates[0], ... ns->pstates[ns->npstates], ns->state | |
1204 | * | |
1205 | * If (one and only one) matching operation is found, it is accepted ( | |
1206 | * ns->ops, ns->state, ns->nxstate are initialized, ns->npstate is | |
1207 | * zeroed). | |
61b03bd7 | 1208 | * |
daf05ec0 | 1209 | * If there are several matches, the current state is pushed to the |
1da177e4 LT |
1210 | * ns->pstates. |
1211 | * | |
1212 | * The operation can be unknown only while commands are input to the chip. | |
1213 | * As soon as address command is accepted, the operation must be known. | |
1214 | * In such situation the function is called with 'flag' != 0, and the | |
1215 | * operation is searched using the following pattern: | |
1216 | * ns->pstates[0], ... ns->pstates[ns->npstates], <address input> | |
61b03bd7 | 1217 | * |
daf05ec0 | 1218 | * It is supposed that this pattern must either match one operation or |
1da177e4 LT |
1219 | * none. There can't be ambiguity in that case. |
1220 | * | |
daf05ec0 | 1221 | * If no matches found, the function does the following: |
1da177e4 LT |
1222 | * 1. if there are saved states present, try to ignore them and search |
1223 | * again only using the last command. If nothing was found, switch | |
1224 | * to the STATE_READY state. | |
1225 | * 2. if there are no saved states, switch to the STATE_READY state. | |
1226 | * | |
1227 | * RETURNS: -2 - no matched operations found. | |
1228 | * -1 - several matches. | |
1229 | * 0 - operation is found. | |
1230 | */ | |
a5602146 | 1231 | static int find_operation(struct nandsim *ns, uint32_t flag) |
1da177e4 LT |
1232 | { |
1233 | int opsfound = 0; | |
1234 | int i, j, idx = 0; | |
61b03bd7 | 1235 | |
1da177e4 LT |
1236 | for (i = 0; i < NS_OPER_NUM; i++) { |
1237 | ||
1238 | int found = 1; | |
61b03bd7 | 1239 | |
1da177e4 LT |
1240 | if (!(ns->options & ops[i].reqopts)) |
1241 | /* Ignore operations we can't perform */ | |
1242 | continue; | |
61b03bd7 | 1243 | |
1da177e4 LT |
1244 | if (flag) { |
1245 | if (!(ops[i].states[ns->npstates] & STATE_ADDR_MASK)) | |
1246 | continue; | |
1247 | } else { | |
1248 | if (NS_STATE(ns->state) != NS_STATE(ops[i].states[ns->npstates])) | |
1249 | continue; | |
1250 | } | |
1251 | ||
61b03bd7 | 1252 | for (j = 0; j < ns->npstates; j++) |
1da177e4 LT |
1253 | if (NS_STATE(ops[i].states[j]) != NS_STATE(ns->pstates[j]) |
1254 | && (ns->options & ops[idx].reqopts)) { | |
1255 | found = 0; | |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | if (found) { | |
1260 | idx = i; | |
1261 | opsfound += 1; | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | if (opsfound == 1) { | |
1266 | /* Exact match */ | |
1267 | ns->op = &ops[idx].states[0]; | |
1268 | if (flag) { | |
61b03bd7 | 1269 | /* |
1da177e4 LT |
1270 | * In this case the find_operation function was |
1271 | * called when address has just began input. But it isn't | |
1272 | * yet fully input and the current state must | |
1273 | * not be one of STATE_ADDR_*, but the STATE_ADDR_* | |
1274 | * state must be the next state (ns->nxstate). | |
1275 | */ | |
1276 | ns->stateidx = ns->npstates - 1; | |
1277 | } else { | |
1278 | ns->stateidx = ns->npstates; | |
1279 | } | |
1280 | ns->npstates = 0; | |
1281 | ns->state = ns->op[ns->stateidx]; | |
1282 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1283 | NS_DBG("find_operation: operation found, index: %d, state: %s, nxstate %s\n", | |
1284 | idx, get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1285 | return 0; | |
1286 | } | |
61b03bd7 | 1287 | |
1da177e4 LT |
1288 | if (opsfound == 0) { |
1289 | /* Nothing was found. Try to ignore previous commands (if any) and search again */ | |
1290 | if (ns->npstates != 0) { | |
1291 | NS_DBG("find_operation: no operation found, try again with state %s\n", | |
1292 | get_state_name(ns->state)); | |
1293 | ns->npstates = 0; | |
1294 | return find_operation(ns, 0); | |
1295 | ||
1296 | } | |
1297 | NS_DBG("find_operation: no operations found\n"); | |
1298 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1299 | return -2; | |
1300 | } | |
61b03bd7 | 1301 | |
1da177e4 LT |
1302 | if (flag) { |
1303 | /* This shouldn't happen */ | |
1304 | NS_DBG("find_operation: BUG, operation must be known if address is input\n"); | |
1305 | return -2; | |
1306 | } | |
61b03bd7 | 1307 | |
1da177e4 LT |
1308 | NS_DBG("find_operation: there is still ambiguity\n"); |
1309 | ||
1310 | ns->pstates[ns->npstates++] = ns->state; | |
1311 | ||
1312 | return -1; | |
1313 | } | |
1314 | ||
a9fc8991 AH |
1315 | static void put_pages(struct nandsim *ns) |
1316 | { | |
1317 | int i; | |
1318 | ||
1319 | for (i = 0; i < ns->held_cnt; i++) | |
09cbfeaf | 1320 | put_page(ns->held_pages[i]); |
a9fc8991 AH |
1321 | } |
1322 | ||
1323 | /* Get page cache pages in advance to provide NOFS memory allocation */ | |
1324 | static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t pos) | |
1325 | { | |
1326 | pgoff_t index, start_index, end_index; | |
1327 | struct page *page; | |
1328 | struct address_space *mapping = file->f_mapping; | |
1329 | ||
09cbfeaf KS |
1330 | start_index = pos >> PAGE_SHIFT; |
1331 | end_index = (pos + count - 1) >> PAGE_SHIFT; | |
a9fc8991 AH |
1332 | if (end_index - start_index + 1 > NS_MAX_HELD_PAGES) |
1333 | return -EINVAL; | |
1334 | ns->held_cnt = 0; | |
1335 | for (index = start_index; index <= end_index; index++) { | |
1336 | page = find_get_page(mapping, index); | |
1337 | if (page == NULL) { | |
1338 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1339 | if (page == NULL) { | |
1340 | write_inode_now(mapping->host, 1); | |
1341 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1342 | } | |
1343 | if (page == NULL) { | |
1344 | put_pages(ns); | |
1345 | return -ENOMEM; | |
1346 | } | |
1347 | unlock_page(page); | |
1348 | } | |
1349 | ns->held_pages[ns->held_cnt++] = page; | |
1350 | } | |
1351 | return 0; | |
1352 | } | |
1353 | ||
7bb307e8 | 1354 | static ssize_t read_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) |
a9fc8991 | 1355 | { |
a9fc8991 | 1356 | ssize_t tx; |
dcbe8214 VB |
1357 | int err; |
1358 | unsigned int noreclaim_flag; | |
a9fc8991 | 1359 | |
7bb307e8 | 1360 | err = get_pages(ns, file, count, pos); |
a9fc8991 AH |
1361 | if (err) |
1362 | return err; | |
dcbe8214 | 1363 | noreclaim_flag = memalloc_noreclaim_save(); |
bdd1d2d3 | 1364 | tx = kernel_read(file, buf, count, &pos); |
dcbe8214 | 1365 | memalloc_noreclaim_restore(noreclaim_flag); |
a9fc8991 AH |
1366 | put_pages(ns); |
1367 | return tx; | |
1368 | } | |
1369 | ||
7bb307e8 | 1370 | static ssize_t write_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t pos) |
a9fc8991 | 1371 | { |
a9fc8991 | 1372 | ssize_t tx; |
dcbe8214 VB |
1373 | int err; |
1374 | unsigned int noreclaim_flag; | |
a9fc8991 | 1375 | |
7bb307e8 | 1376 | err = get_pages(ns, file, count, pos); |
a9fc8991 AH |
1377 | if (err) |
1378 | return err; | |
dcbe8214 | 1379 | noreclaim_flag = memalloc_noreclaim_save(); |
e13ec939 | 1380 | tx = kernel_write(file, buf, count, &pos); |
dcbe8214 | 1381 | memalloc_noreclaim_restore(noreclaim_flag); |
a9fc8991 AH |
1382 | put_pages(ns); |
1383 | return tx; | |
1384 | } | |
1385 | ||
d086d436 VK |
1386 | /* |
1387 | * Returns a pointer to the current page. | |
1388 | */ | |
1389 | static inline union ns_mem *NS_GET_PAGE(struct nandsim *ns) | |
1390 | { | |
1391 | return &(ns->pages[ns->regs.row]); | |
1392 | } | |
1393 | ||
1394 | /* | |
1395 | * Retuns a pointer to the current byte, within the current page. | |
1396 | */ | |
1397 | static inline u_char *NS_PAGE_BYTE_OFF(struct nandsim *ns) | |
1398 | { | |
1399 | return NS_GET_PAGE(ns)->byte + ns->regs.column + ns->regs.off; | |
1400 | } | |
1401 | ||
b2b263f2 | 1402 | static int do_read_error(struct nandsim *ns, int num) |
a9fc8991 AH |
1403 | { |
1404 | unsigned int page_no = ns->regs.row; | |
1405 | ||
1406 | if (read_error(page_no)) { | |
7e45bf83 | 1407 | prandom_bytes(ns->buf.byte, num); |
a9fc8991 AH |
1408 | NS_WARN("simulating read error in page %u\n", page_no); |
1409 | return 1; | |
1410 | } | |
1411 | return 0; | |
1412 | } | |
1413 | ||
b2b263f2 | 1414 | static void do_bit_flips(struct nandsim *ns, int num) |
a9fc8991 | 1415 | { |
aca662a3 | 1416 | if (bitflips && prandom_u32() < (1 << 22)) { |
a9fc8991 AH |
1417 | int flips = 1; |
1418 | if (bitflips > 1) | |
aca662a3 | 1419 | flips = (prandom_u32() % (int) bitflips) + 1; |
a9fc8991 | 1420 | while (flips--) { |
aca662a3 | 1421 | int pos = prandom_u32() % (num * 8); |
a9fc8991 AH |
1422 | ns->buf.byte[pos / 8] ^= (1 << (pos % 8)); |
1423 | NS_WARN("read_page: flipping bit %d in page %d " | |
1424 | "reading from %d ecc: corrected=%u failed=%u\n", | |
1425 | pos, ns->regs.row, ns->regs.column + ns->regs.off, | |
1426 | nsmtd->ecc_stats.corrected, nsmtd->ecc_stats.failed); | |
1427 | } | |
1428 | } | |
1429 | } | |
1430 | ||
d086d436 VK |
1431 | /* |
1432 | * Fill the NAND buffer with data read from the specified page. | |
1433 | */ | |
1434 | static void read_page(struct nandsim *ns, int num) | |
1435 | { | |
1436 | union ns_mem *mypage; | |
1437 | ||
a9fc8991 | 1438 | if (ns->cfile) { |
08efe91a | 1439 | if (!test_bit(ns->regs.row, ns->pages_written)) { |
a9fc8991 AH |
1440 | NS_DBG("read_page: page %d not written\n", ns->regs.row); |
1441 | memset(ns->buf.byte, 0xFF, num); | |
1442 | } else { | |
1443 | loff_t pos; | |
1444 | ssize_t tx; | |
1445 | ||
1446 | NS_DBG("read_page: page %d written, reading from %d\n", | |
1447 | ns->regs.row, ns->regs.column + ns->regs.off); | |
1448 | if (do_read_error(ns, num)) | |
1449 | return; | |
6d07fcf7 | 1450 | pos = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; |
7bb307e8 | 1451 | tx = read_file(ns, ns->cfile, ns->buf.byte, num, pos); |
a9fc8991 AH |
1452 | if (tx != num) { |
1453 | NS_ERR("read_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1454 | return; | |
1455 | } | |
1456 | do_bit_flips(ns, num); | |
1457 | } | |
1458 | return; | |
1459 | } | |
1460 | ||
d086d436 VK |
1461 | mypage = NS_GET_PAGE(ns); |
1462 | if (mypage->byte == NULL) { | |
1463 | NS_DBG("read_page: page %d not allocated\n", ns->regs.row); | |
1464 | memset(ns->buf.byte, 0xFF, num); | |
1465 | } else { | |
1466 | NS_DBG("read_page: page %d allocated, reading from %d\n", | |
1467 | ns->regs.row, ns->regs.column + ns->regs.off); | |
a9fc8991 | 1468 | if (do_read_error(ns, num)) |
514087e7 | 1469 | return; |
d086d436 | 1470 | memcpy(ns->buf.byte, NS_PAGE_BYTE_OFF(ns), num); |
a9fc8991 | 1471 | do_bit_flips(ns, num); |
d086d436 VK |
1472 | } |
1473 | } | |
1474 | ||
1475 | /* | |
1476 | * Erase all pages in the specified sector. | |
1477 | */ | |
1478 | static void erase_sector(struct nandsim *ns) | |
1479 | { | |
1480 | union ns_mem *mypage; | |
1481 | int i; | |
1482 | ||
a9fc8991 AH |
1483 | if (ns->cfile) { |
1484 | for (i = 0; i < ns->geom.pgsec; i++) | |
08efe91a AM |
1485 | if (__test_and_clear_bit(ns->regs.row + i, |
1486 | ns->pages_written)) { | |
a9fc8991 | 1487 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row + i); |
a9fc8991 AH |
1488 | } |
1489 | return; | |
1490 | } | |
1491 | ||
d086d436 VK |
1492 | mypage = NS_GET_PAGE(ns); |
1493 | for (i = 0; i < ns->geom.pgsec; i++) { | |
1494 | if (mypage->byte != NULL) { | |
1495 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row+i); | |
8a4c2495 | 1496 | kmem_cache_free(ns->nand_pages_slab, mypage->byte); |
d086d436 VK |
1497 | mypage->byte = NULL; |
1498 | } | |
1499 | mypage++; | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | /* | |
1504 | * Program the specified page with the contents from the NAND buffer. | |
1505 | */ | |
1506 | static int prog_page(struct nandsim *ns, int num) | |
1507 | { | |
82810b7b | 1508 | int i; |
d086d436 VK |
1509 | union ns_mem *mypage; |
1510 | u_char *pg_off; | |
1511 | ||
a9fc8991 | 1512 | if (ns->cfile) { |
7bb307e8 | 1513 | loff_t off; |
a9fc8991 AH |
1514 | ssize_t tx; |
1515 | int all; | |
1516 | ||
1517 | NS_DBG("prog_page: writing page %d\n", ns->regs.row); | |
1518 | pg_off = ns->file_buf + ns->regs.column + ns->regs.off; | |
6d07fcf7 | 1519 | off = (loff_t)NS_RAW_OFFSET(ns) + ns->regs.off; |
08efe91a | 1520 | if (!test_bit(ns->regs.row, ns->pages_written)) { |
a9fc8991 AH |
1521 | all = 1; |
1522 | memset(ns->file_buf, 0xff, ns->geom.pgszoob); | |
1523 | } else { | |
1524 | all = 0; | |
7bb307e8 | 1525 | tx = read_file(ns, ns->cfile, pg_off, num, off); |
a9fc8991 AH |
1526 | if (tx != num) { |
1527 | NS_ERR("prog_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1528 | return -1; | |
1529 | } | |
1530 | } | |
1531 | for (i = 0; i < num; i++) | |
1532 | pg_off[i] &= ns->buf.byte[i]; | |
1533 | if (all) { | |
7bb307e8 AV |
1534 | loff_t pos = (loff_t)ns->regs.row * ns->geom.pgszoob; |
1535 | tx = write_file(ns, ns->cfile, ns->file_buf, ns->geom.pgszoob, pos); | |
a9fc8991 AH |
1536 | if (tx != ns->geom.pgszoob) { |
1537 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1538 | return -1; | |
1539 | } | |
08efe91a | 1540 | __set_bit(ns->regs.row, ns->pages_written); |
a9fc8991 | 1541 | } else { |
7bb307e8 | 1542 | tx = write_file(ns, ns->cfile, pg_off, num, off); |
a9fc8991 AH |
1543 | if (tx != num) { |
1544 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1545 | return -1; | |
1546 | } | |
1547 | } | |
1548 | return 0; | |
1549 | } | |
1550 | ||
d086d436 VK |
1551 | mypage = NS_GET_PAGE(ns); |
1552 | if (mypage->byte == NULL) { | |
1553 | NS_DBG("prog_page: allocating page %d\n", ns->regs.row); | |
98b830d2 AB |
1554 | /* |
1555 | * We allocate memory with GFP_NOFS because a flash FS may | |
1556 | * utilize this. If it is holding an FS lock, then gets here, | |
8a4c2495 AK |
1557 | * then kernel memory alloc runs writeback which goes to the FS |
1558 | * again and deadlocks. This was seen in practice. | |
98b830d2 | 1559 | */ |
8a4c2495 | 1560 | mypage->byte = kmem_cache_alloc(ns->nand_pages_slab, GFP_NOFS); |
d086d436 VK |
1561 | if (mypage->byte == NULL) { |
1562 | NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row); | |
1563 | return -1; | |
1564 | } | |
1565 | memset(mypage->byte, 0xFF, ns->geom.pgszoob); | |
1566 | } | |
1567 | ||
1568 | pg_off = NS_PAGE_BYTE_OFF(ns); | |
82810b7b AB |
1569 | for (i = 0; i < num; i++) |
1570 | pg_off[i] &= ns->buf.byte[i]; | |
d086d436 VK |
1571 | |
1572 | return 0; | |
1573 | } | |
1574 | ||
1da177e4 LT |
1575 | /* |
1576 | * If state has any action bit, perform this action. | |
1577 | * | |
1578 | * RETURNS: 0 if success, -1 if error. | |
1579 | */ | |
a5602146 | 1580 | static int do_state_action(struct nandsim *ns, uint32_t action) |
1da177e4 | 1581 | { |
d086d436 | 1582 | int num; |
1da177e4 | 1583 | int busdiv = ns->busw == 8 ? 1 : 2; |
514087e7 | 1584 | unsigned int erase_block_no, page_no; |
1da177e4 LT |
1585 | |
1586 | action &= ACTION_MASK; | |
61b03bd7 | 1587 | |
1da177e4 LT |
1588 | /* Check that page address input is correct */ |
1589 | if (action != ACTION_SECERASE && ns->regs.row >= ns->geom.pgnum) { | |
1590 | NS_WARN("do_state_action: wrong page number (%#x)\n", ns->regs.row); | |
1591 | return -1; | |
1592 | } | |
1593 | ||
1594 | switch (action) { | |
1595 | ||
1596 | case ACTION_CPY: | |
1597 | /* | |
1598 | * Copy page data to the internal buffer. | |
1599 | */ | |
1600 | ||
1601 | /* Column shouldn't be very large */ | |
1602 | if (ns->regs.column >= (ns->geom.pgszoob - ns->regs.off)) { | |
1603 | NS_ERR("do_state_action: column number is too large\n"); | |
1604 | break; | |
1605 | } | |
1606 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
d086d436 | 1607 | read_page(ns, num); |
1da177e4 LT |
1608 | |
1609 | NS_DBG("do_state_action: (ACTION_CPY:) copy %d bytes to int buf, raw offset %d\n", | |
1610 | num, NS_RAW_OFFSET(ns) + ns->regs.off); | |
61b03bd7 | 1611 | |
1da177e4 LT |
1612 | if (ns->regs.off == 0) |
1613 | NS_LOG("read page %d\n", ns->regs.row); | |
1614 | else if (ns->regs.off < ns->geom.pgsz) | |
1615 | NS_LOG("read page %d (second half)\n", ns->regs.row); | |
1616 | else | |
1617 | NS_LOG("read OOB of page %d\n", ns->regs.row); | |
61b03bd7 | 1618 | |
1da177e4 LT |
1619 | NS_UDELAY(access_delay); |
1620 | NS_UDELAY(input_cycle * ns->geom.pgsz / 1000 / busdiv); | |
1621 | ||
1622 | break; | |
1623 | ||
1624 | case ACTION_SECERASE: | |
1625 | /* | |
1626 | * Erase sector. | |
1627 | */ | |
61b03bd7 | 1628 | |
1da177e4 LT |
1629 | if (ns->lines.wp) { |
1630 | NS_ERR("do_state_action: device is write-protected, ignore sector erase\n"); | |
1631 | return -1; | |
1632 | } | |
61b03bd7 | 1633 | |
1da177e4 LT |
1634 | if (ns->regs.row >= ns->geom.pgnum - ns->geom.pgsec |
1635 | || (ns->regs.row & ~(ns->geom.secsz - 1))) { | |
1636 | NS_ERR("do_state_action: wrong sector address (%#x)\n", ns->regs.row); | |
1637 | return -1; | |
1638 | } | |
61b03bd7 | 1639 | |
1da177e4 LT |
1640 | ns->regs.row = (ns->regs.row << |
1641 | 8 * (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) | ns->regs.column; | |
1642 | ns->regs.column = 0; | |
61b03bd7 | 1643 | |
514087e7 AH |
1644 | erase_block_no = ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift); |
1645 | ||
1da177e4 LT |
1646 | NS_DBG("do_state_action: erase sector at address %#x, off = %d\n", |
1647 | ns->regs.row, NS_RAW_OFFSET(ns)); | |
514087e7 | 1648 | NS_LOG("erase sector %u\n", erase_block_no); |
1da177e4 | 1649 | |
d086d436 | 1650 | erase_sector(ns); |
61b03bd7 | 1651 | |
1da177e4 | 1652 | NS_MDELAY(erase_delay); |
61b03bd7 | 1653 | |
57aa6b54 AH |
1654 | if (erase_block_wear) |
1655 | update_wear(erase_block_no); | |
1656 | ||
514087e7 AH |
1657 | if (erase_error(erase_block_no)) { |
1658 | NS_WARN("simulating erase failure in erase block %u\n", erase_block_no); | |
1659 | return -1; | |
1660 | } | |
1661 | ||
1da177e4 LT |
1662 | break; |
1663 | ||
1664 | case ACTION_PRGPAGE: | |
1665 | /* | |
daf05ec0 | 1666 | * Program page - move internal buffer data to the page. |
1da177e4 LT |
1667 | */ |
1668 | ||
1669 | if (ns->lines.wp) { | |
1670 | NS_WARN("do_state_action: device is write-protected, programm\n"); | |
1671 | return -1; | |
1672 | } | |
1673 | ||
1674 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1675 | if (num != ns->regs.count) { | |
1676 | NS_ERR("do_state_action: too few bytes were input (%d instead of %d)\n", | |
1677 | ns->regs.count, num); | |
1678 | return -1; | |
1679 | } | |
1680 | ||
d086d436 VK |
1681 | if (prog_page(ns, num) == -1) |
1682 | return -1; | |
1da177e4 | 1683 | |
514087e7 AH |
1684 | page_no = ns->regs.row; |
1685 | ||
1da177e4 LT |
1686 | NS_DBG("do_state_action: copy %d bytes from int buf to (%#x, %#x), raw off = %d\n", |
1687 | num, ns->regs.row, ns->regs.column, NS_RAW_OFFSET(ns) + ns->regs.off); | |
1688 | NS_LOG("programm page %d\n", ns->regs.row); | |
61b03bd7 | 1689 | |
1da177e4 LT |
1690 | NS_UDELAY(programm_delay); |
1691 | NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv); | |
61b03bd7 | 1692 | |
514087e7 AH |
1693 | if (write_error(page_no)) { |
1694 | NS_WARN("simulating write failure in page %u\n", page_no); | |
1695 | return -1; | |
1696 | } | |
1697 | ||
1da177e4 | 1698 | break; |
61b03bd7 | 1699 | |
1da177e4 LT |
1700 | case ACTION_ZEROOFF: |
1701 | NS_DBG("do_state_action: set internal offset to 0\n"); | |
1702 | ns->regs.off = 0; | |
1703 | break; | |
1704 | ||
1705 | case ACTION_HALFOFF: | |
1706 | if (!(ns->options & OPT_PAGE512_8BIT)) { | |
1707 | NS_ERR("do_state_action: BUG! can't skip half of page for non-512" | |
1708 | "byte page size 8x chips\n"); | |
1709 | return -1; | |
1710 | } | |
1711 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz/2); | |
1712 | ns->regs.off = ns->geom.pgsz/2; | |
1713 | break; | |
1714 | ||
1715 | case ACTION_OOBOFF: | |
1716 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz); | |
1717 | ns->regs.off = ns->geom.pgsz; | |
1718 | break; | |
61b03bd7 | 1719 | |
1da177e4 LT |
1720 | default: |
1721 | NS_DBG("do_state_action: BUG! unknown action\n"); | |
1722 | } | |
1723 | ||
1724 | return 0; | |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * Switch simulator's state. | |
1729 | */ | |
a5602146 | 1730 | static void switch_state(struct nandsim *ns) |
1da177e4 LT |
1731 | { |
1732 | if (ns->op) { | |
1733 | /* | |
1734 | * The current operation have already been identified. | |
1735 | * Just follow the states chain. | |
1736 | */ | |
61b03bd7 | 1737 | |
1da177e4 LT |
1738 | ns->stateidx += 1; |
1739 | ns->state = ns->nxstate; | |
1740 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1741 | ||
1742 | NS_DBG("switch_state: operation is known, switch to the next state, " | |
1743 | "state: %s, nxstate: %s\n", | |
1744 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1745 | ||
1746 | /* See, whether we need to do some action */ | |
1747 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1748 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1749 | return; | |
1750 | } | |
61b03bd7 | 1751 | |
1da177e4 LT |
1752 | } else { |
1753 | /* | |
1754 | * We don't yet know which operation we perform. | |
1755 | * Try to identify it. | |
1756 | */ | |
1757 | ||
61b03bd7 | 1758 | /* |
1da177e4 LT |
1759 | * The only event causing the switch_state function to |
1760 | * be called with yet unknown operation is new command. | |
1761 | */ | |
1762 | ns->state = get_state_by_command(ns->regs.command); | |
1763 | ||
1764 | NS_DBG("switch_state: operation is unknown, try to find it\n"); | |
1765 | ||
1766 | if (find_operation(ns, 0) != 0) | |
1767 | return; | |
1768 | ||
1769 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1770 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1771 | return; | |
1772 | } | |
1773 | } | |
1774 | ||
1775 | /* For 16x devices column means the page offset in words */ | |
1776 | if ((ns->nxstate & STATE_ADDR_MASK) && ns->busw == 16) { | |
1777 | NS_DBG("switch_state: double the column number for 16x device\n"); | |
1778 | ns->regs.column <<= 1; | |
1779 | } | |
1780 | ||
1781 | if (NS_STATE(ns->nxstate) == STATE_READY) { | |
1782 | /* | |
1783 | * The current state is the last. Return to STATE_READY | |
1784 | */ | |
1785 | ||
1786 | u_char status = NS_STATUS_OK(ns); | |
61b03bd7 | 1787 | |
1da177e4 LT |
1788 | /* In case of data states, see if all bytes were input/output */ |
1789 | if ((ns->state & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) | |
1790 | && ns->regs.count != ns->regs.num) { | |
1791 | NS_WARN("switch_state: not all bytes were processed, %d left\n", | |
1792 | ns->regs.num - ns->regs.count); | |
1793 | status = NS_STATUS_FAILED(ns); | |
1794 | } | |
61b03bd7 | 1795 | |
1da177e4 LT |
1796 | NS_DBG("switch_state: operation complete, switch to STATE_READY state\n"); |
1797 | ||
1798 | switch_to_ready_state(ns, status); | |
1799 | ||
1800 | return; | |
1801 | } else if (ns->nxstate & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) { | |
61b03bd7 | 1802 | /* |
1da177e4 LT |
1803 | * If the next state is data input/output, switch to it now |
1804 | */ | |
61b03bd7 | 1805 | |
1da177e4 LT |
1806 | ns->state = ns->nxstate; |
1807 | ns->nxstate = ns->op[++ns->stateidx + 1]; | |
1808 | ns->regs.num = ns->regs.count = 0; | |
1809 | ||
1810 | NS_DBG("switch_state: the next state is data I/O, switch, " | |
1811 | "state: %s, nxstate: %s\n", | |
1812 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1813 | ||
1814 | /* | |
1815 | * Set the internal register to the count of bytes which | |
1816 | * are expected to be input or output | |
1817 | */ | |
1818 | switch (NS_STATE(ns->state)) { | |
1819 | case STATE_DATAIN: | |
1820 | case STATE_DATAOUT: | |
1821 | ns->regs.num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1822 | break; | |
61b03bd7 | 1823 | |
1da177e4 LT |
1824 | case STATE_DATAOUT_ID: |
1825 | ns->regs.num = ns->geom.idbytes; | |
1826 | break; | |
61b03bd7 | 1827 | |
1da177e4 | 1828 | case STATE_DATAOUT_STATUS: |
1da177e4 LT |
1829 | ns->regs.count = ns->regs.num = 0; |
1830 | break; | |
61b03bd7 | 1831 | |
1da177e4 LT |
1832 | default: |
1833 | NS_ERR("switch_state: BUG! unknown data state\n"); | |
1834 | } | |
1835 | ||
1836 | } else if (ns->nxstate & STATE_ADDR_MASK) { | |
1837 | /* | |
1838 | * If the next state is address input, set the internal | |
1839 | * register to the number of expected address bytes | |
1840 | */ | |
1841 | ||
1842 | ns->regs.count = 0; | |
61b03bd7 | 1843 | |
1da177e4 LT |
1844 | switch (NS_STATE(ns->nxstate)) { |
1845 | case STATE_ADDR_PAGE: | |
1846 | ns->regs.num = ns->geom.pgaddrbytes; | |
61b03bd7 | 1847 | |
1da177e4 LT |
1848 | break; |
1849 | case STATE_ADDR_SEC: | |
1850 | ns->regs.num = ns->geom.secaddrbytes; | |
1851 | break; | |
61b03bd7 | 1852 | |
1da177e4 LT |
1853 | case STATE_ADDR_ZERO: |
1854 | ns->regs.num = 1; | |
1855 | break; | |
1856 | ||
74216be4 AB |
1857 | case STATE_ADDR_COLUMN: |
1858 | /* Column address is always 2 bytes */ | |
1859 | ns->regs.num = ns->geom.pgaddrbytes - ns->geom.secaddrbytes; | |
1860 | break; | |
1861 | ||
1da177e4 LT |
1862 | default: |
1863 | NS_ERR("switch_state: BUG! unknown address state\n"); | |
1864 | } | |
1865 | } else { | |
61b03bd7 | 1866 | /* |
1da177e4 LT |
1867 | * Just reset internal counters. |
1868 | */ | |
1869 | ||
1870 | ns->regs.num = 0; | |
1871 | ns->regs.count = 0; | |
1872 | } | |
1873 | } | |
1874 | ||
a5602146 | 1875 | static u_char ns_nand_read_byte(struct mtd_info *mtd) |
1da177e4 | 1876 | { |
c66b651c BN |
1877 | struct nand_chip *chip = mtd_to_nand(mtd); |
1878 | struct nandsim *ns = nand_get_controller_data(chip); | |
1da177e4 LT |
1879 | u_char outb = 0x00; |
1880 | ||
1881 | /* Sanity and correctness checks */ | |
1882 | if (!ns->lines.ce) { | |
1883 | NS_ERR("read_byte: chip is disabled, return %#x\n", (uint)outb); | |
1884 | return outb; | |
1885 | } | |
1886 | if (ns->lines.ale || ns->lines.cle) { | |
1887 | NS_ERR("read_byte: ALE or CLE pin is high, return %#x\n", (uint)outb); | |
1888 | return outb; | |
1889 | } | |
1890 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
1891 | NS_WARN("read_byte: unexpected data output cycle, state is %s " | |
1892 | "return %#x\n", get_state_name(ns->state), (uint)outb); | |
1893 | return outb; | |
1894 | } | |
1895 | ||
1896 | /* Status register may be read as many times as it is wanted */ | |
1897 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS) { | |
1898 | NS_DBG("read_byte: return %#x status\n", ns->regs.status); | |
1899 | return ns->regs.status; | |
1900 | } | |
1901 | ||
1902 | /* Check if there is any data in the internal buffer which may be read */ | |
1903 | if (ns->regs.count == ns->regs.num) { | |
1904 | NS_WARN("read_byte: no more data to output, return %#x\n", (uint)outb); | |
1905 | return outb; | |
1906 | } | |
1907 | ||
1908 | switch (NS_STATE(ns->state)) { | |
1909 | case STATE_DATAOUT: | |
1910 | if (ns->busw == 8) { | |
1911 | outb = ns->buf.byte[ns->regs.count]; | |
1912 | ns->regs.count += 1; | |
1913 | } else { | |
1914 | outb = (u_char)cpu_to_le16(ns->buf.word[ns->regs.count >> 1]); | |
1915 | ns->regs.count += 2; | |
1916 | } | |
1917 | break; | |
1918 | case STATE_DATAOUT_ID: | |
1919 | NS_DBG("read_byte: read ID byte %d, total = %d\n", ns->regs.count, ns->regs.num); | |
1920 | outb = ns->ids[ns->regs.count]; | |
1921 | ns->regs.count += 1; | |
1922 | break; | |
1923 | default: | |
1924 | BUG(); | |
1925 | } | |
61b03bd7 | 1926 | |
1da177e4 LT |
1927 | if (ns->regs.count == ns->regs.num) { |
1928 | NS_DBG("read_byte: all bytes were read\n"); | |
1929 | ||
831d316b | 1930 | if (NS_STATE(ns->nxstate) == STATE_READY) |
1da177e4 | 1931 | switch_state(ns); |
1da177e4 | 1932 | } |
61b03bd7 | 1933 | |
1da177e4 LT |
1934 | return outb; |
1935 | } | |
1936 | ||
a5602146 | 1937 | static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte) |
1da177e4 | 1938 | { |
c66b651c BN |
1939 | struct nand_chip *chip = mtd_to_nand(mtd); |
1940 | struct nandsim *ns = nand_get_controller_data(chip); | |
61b03bd7 | 1941 | |
1da177e4 LT |
1942 | /* Sanity and correctness checks */ |
1943 | if (!ns->lines.ce) { | |
1944 | NS_ERR("write_byte: chip is disabled, ignore write\n"); | |
1945 | return; | |
1946 | } | |
1947 | if (ns->lines.ale && ns->lines.cle) { | |
1948 | NS_ERR("write_byte: ALE and CLE pins are high simultaneously, ignore write\n"); | |
1949 | return; | |
1950 | } | |
61b03bd7 | 1951 | |
1da177e4 LT |
1952 | if (ns->lines.cle == 1) { |
1953 | /* | |
1954 | * The byte written is a command. | |
1955 | */ | |
1956 | ||
1957 | if (byte == NAND_CMD_RESET) { | |
1958 | NS_LOG("reset chip\n"); | |
1959 | switch_to_ready_state(ns, NS_STATUS_OK(ns)); | |
1960 | return; | |
1961 | } | |
1962 | ||
74216be4 AB |
1963 | /* Check that the command byte is correct */ |
1964 | if (check_command(byte)) { | |
1965 | NS_ERR("write_byte: unknown command %#x\n", (uint)byte); | |
1966 | return; | |
1967 | } | |
1968 | ||
1da177e4 | 1969 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS |
74216be4 AB |
1970 | || NS_STATE(ns->state) == STATE_DATAOUT) { |
1971 | int row = ns->regs.row; | |
1972 | ||
1da177e4 | 1973 | switch_state(ns); |
74216be4 AB |
1974 | if (byte == NAND_CMD_RNDOUT) |
1975 | ns->regs.row = row; | |
1976 | } | |
1da177e4 LT |
1977 | |
1978 | /* Check if chip is expecting command */ | |
1979 | if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) { | |
9359ea46 AH |
1980 | /* Do not warn if only 2 id bytes are read */ |
1981 | if (!(ns->regs.command == NAND_CMD_READID && | |
1982 | NS_STATE(ns->state) == STATE_DATAOUT_ID && ns->regs.count == 2)) { | |
1983 | /* | |
1984 | * We are in situation when something else (not command) | |
1985 | * was expected but command was input. In this case ignore | |
1986 | * previous command(s)/state(s) and accept the last one. | |
1987 | */ | |
1988 | NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, " | |
1989 | "ignore previous states\n", (uint)byte, get_state_name(ns->nxstate)); | |
1990 | } | |
1da177e4 LT |
1991 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); |
1992 | } | |
61b03bd7 | 1993 | |
1da177e4 LT |
1994 | NS_DBG("command byte corresponding to %s state accepted\n", |
1995 | get_state_name(get_state_by_command(byte))); | |
1996 | ns->regs.command = byte; | |
1997 | switch_state(ns); | |
1998 | ||
1999 | } else if (ns->lines.ale == 1) { | |
2000 | /* | |
2001 | * The byte written is an address. | |
2002 | */ | |
2003 | ||
2004 | if (NS_STATE(ns->nxstate) == STATE_UNKNOWN) { | |
2005 | ||
2006 | NS_DBG("write_byte: operation isn't known yet, identify it\n"); | |
2007 | ||
2008 | if (find_operation(ns, 1) < 0) | |
2009 | return; | |
61b03bd7 | 2010 | |
1da177e4 LT |
2011 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { |
2012 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2013 | return; | |
2014 | } | |
61b03bd7 | 2015 | |
1da177e4 LT |
2016 | ns->regs.count = 0; |
2017 | switch (NS_STATE(ns->nxstate)) { | |
2018 | case STATE_ADDR_PAGE: | |
2019 | ns->regs.num = ns->geom.pgaddrbytes; | |
2020 | break; | |
2021 | case STATE_ADDR_SEC: | |
2022 | ns->regs.num = ns->geom.secaddrbytes; | |
2023 | break; | |
2024 | case STATE_ADDR_ZERO: | |
2025 | ns->regs.num = 1; | |
2026 | break; | |
2027 | default: | |
2028 | BUG(); | |
2029 | } | |
2030 | } | |
2031 | ||
2032 | /* Check that chip is expecting address */ | |
2033 | if (!(ns->nxstate & STATE_ADDR_MASK)) { | |
2034 | NS_ERR("write_byte: address (%#x) isn't expected, expected state is %s, " | |
2035 | "switch to STATE_READY\n", (uint)byte, get_state_name(ns->nxstate)); | |
2036 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2037 | return; | |
2038 | } | |
61b03bd7 | 2039 | |
1da177e4 LT |
2040 | /* Check if this is expected byte */ |
2041 | if (ns->regs.count == ns->regs.num) { | |
2042 | NS_ERR("write_byte: no more address bytes expected\n"); | |
2043 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2044 | return; | |
2045 | } | |
2046 | ||
2047 | accept_addr_byte(ns, byte); | |
2048 | ||
2049 | ns->regs.count += 1; | |
2050 | ||
2051 | NS_DBG("write_byte: address byte %#x was accepted (%d bytes input, %d expected)\n", | |
2052 | (uint)byte, ns->regs.count, ns->regs.num); | |
2053 | ||
2054 | if (ns->regs.count == ns->regs.num) { | |
2055 | NS_DBG("address (%#x, %#x) is accepted\n", ns->regs.row, ns->regs.column); | |
2056 | switch_state(ns); | |
2057 | } | |
61b03bd7 | 2058 | |
1da177e4 LT |
2059 | } else { |
2060 | /* | |
2061 | * The byte written is an input data. | |
2062 | */ | |
61b03bd7 | 2063 | |
1da177e4 LT |
2064 | /* Check that chip is expecting data input */ |
2065 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2066 | NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, " | |
2067 | "switch to %s\n", (uint)byte, | |
2068 | get_state_name(ns->state), get_state_name(STATE_READY)); | |
2069 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2070 | return; | |
2071 | } | |
2072 | ||
2073 | /* Check if this is expected byte */ | |
2074 | if (ns->regs.count == ns->regs.num) { | |
2075 | NS_WARN("write_byte: %u input bytes has already been accepted, ignore write\n", | |
2076 | ns->regs.num); | |
2077 | return; | |
2078 | } | |
2079 | ||
2080 | if (ns->busw == 8) { | |
2081 | ns->buf.byte[ns->regs.count] = byte; | |
2082 | ns->regs.count += 1; | |
2083 | } else { | |
2084 | ns->buf.word[ns->regs.count >> 1] = cpu_to_le16((uint16_t)byte); | |
2085 | ns->regs.count += 2; | |
2086 | } | |
2087 | } | |
2088 | ||
2089 | return; | |
2090 | } | |
2091 | ||
7abd3ef9 TG |
2092 | static void ns_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int bitmask) |
2093 | { | |
c66b651c BN |
2094 | struct nand_chip *chip = mtd_to_nand(mtd); |
2095 | struct nandsim *ns = nand_get_controller_data(chip); | |
7abd3ef9 TG |
2096 | |
2097 | ns->lines.cle = bitmask & NAND_CLE ? 1 : 0; | |
2098 | ns->lines.ale = bitmask & NAND_ALE ? 1 : 0; | |
2099 | ns->lines.ce = bitmask & NAND_NCE ? 1 : 0; | |
2100 | ||
2101 | if (cmd != NAND_CMD_NONE) | |
2102 | ns_nand_write_byte(mtd, cmd); | |
2103 | } | |
2104 | ||
a5602146 | 2105 | static int ns_device_ready(struct mtd_info *mtd) |
1da177e4 LT |
2106 | { |
2107 | NS_DBG("device_ready\n"); | |
2108 | return 1; | |
2109 | } | |
2110 | ||
a5602146 | 2111 | static uint16_t ns_nand_read_word(struct mtd_info *mtd) |
1da177e4 | 2112 | { |
862eba51 | 2113 | struct nand_chip *chip = mtd_to_nand(mtd); |
1da177e4 LT |
2114 | |
2115 | NS_DBG("read_word\n"); | |
61b03bd7 | 2116 | |
1da177e4 LT |
2117 | return chip->read_byte(mtd) | (chip->read_byte(mtd) << 8); |
2118 | } | |
2119 | ||
a5602146 | 2120 | static void ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 | 2121 | { |
c66b651c BN |
2122 | struct nand_chip *chip = mtd_to_nand(mtd); |
2123 | struct nandsim *ns = nand_get_controller_data(chip); | |
1da177e4 LT |
2124 | |
2125 | /* Check that chip is expecting data input */ | |
2126 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2127 | NS_ERR("write_buf: data input isn't expected, state is %s, " | |
2128 | "switch to STATE_READY\n", get_state_name(ns->state)); | |
2129 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2130 | return; | |
2131 | } | |
2132 | ||
2133 | /* Check if these are expected bytes */ | |
2134 | if (ns->regs.count + len > ns->regs.num) { | |
2135 | NS_ERR("write_buf: too many input bytes\n"); | |
2136 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2137 | return; | |
2138 | } | |
2139 | ||
2140 | memcpy(ns->buf.byte + ns->regs.count, buf, len); | |
2141 | ns->regs.count += len; | |
61b03bd7 | 2142 | |
1da177e4 LT |
2143 | if (ns->regs.count == ns->regs.num) { |
2144 | NS_DBG("write_buf: %d bytes were written\n", ns->regs.count); | |
2145 | } | |
2146 | } | |
2147 | ||
a5602146 | 2148 | static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 2149 | { |
c66b651c BN |
2150 | struct nand_chip *chip = mtd_to_nand(mtd); |
2151 | struct nandsim *ns = nand_get_controller_data(chip); | |
1da177e4 LT |
2152 | |
2153 | /* Sanity and correctness checks */ | |
2154 | if (!ns->lines.ce) { | |
2155 | NS_ERR("read_buf: chip is disabled\n"); | |
2156 | return; | |
2157 | } | |
2158 | if (ns->lines.ale || ns->lines.cle) { | |
2159 | NS_ERR("read_buf: ALE or CLE pin is high\n"); | |
2160 | return; | |
2161 | } | |
2162 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
2163 | NS_WARN("read_buf: unexpected data output cycle, current state is %s\n", | |
2164 | get_state_name(ns->state)); | |
2165 | return; | |
2166 | } | |
2167 | ||
2168 | if (NS_STATE(ns->state) != STATE_DATAOUT) { | |
2169 | int i; | |
2170 | ||
2171 | for (i = 0; i < len; i++) | |
862eba51 | 2172 | buf[i] = mtd_to_nand(mtd)->read_byte(mtd); |
1da177e4 LT |
2173 | |
2174 | return; | |
2175 | } | |
2176 | ||
2177 | /* Check if these are expected bytes */ | |
2178 | if (ns->regs.count + len > ns->regs.num) { | |
2179 | NS_ERR("read_buf: too many bytes to read\n"); | |
2180 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2181 | return; | |
2182 | } | |
2183 | ||
2184 | memcpy(buf, ns->buf.byte + ns->regs.count, len); | |
2185 | ns->regs.count += len; | |
61b03bd7 | 2186 | |
1da177e4 | 2187 | if (ns->regs.count == ns->regs.num) { |
831d316b | 2188 | if (NS_STATE(ns->nxstate) == STATE_READY) |
1da177e4 LT |
2189 | switch_state(ns); |
2190 | } | |
61b03bd7 | 2191 | |
1da177e4 LT |
2192 | return; |
2193 | } | |
2194 | ||
1da177e4 LT |
2195 | /* |
2196 | * Module initialization function | |
2197 | */ | |
2b9175c1 | 2198 | static int __init ns_init_module(void) |
1da177e4 LT |
2199 | { |
2200 | struct nand_chip *chip; | |
2201 | struct nandsim *nand; | |
2b77a0ed | 2202 | int retval = -ENOMEM, i; |
1da177e4 LT |
2203 | |
2204 | if (bus_width != 8 && bus_width != 16) { | |
2205 | NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width); | |
2206 | return -EINVAL; | |
2207 | } | |
61b03bd7 | 2208 | |
1da177e4 | 2209 | /* Allocate and initialize mtd_info, nand_chip and nandsim structures */ |
ed10f165 BB |
2210 | chip = kzalloc(sizeof(struct nand_chip) + sizeof(struct nandsim), |
2211 | GFP_KERNEL); | |
2212 | if (!chip) { | |
1da177e4 LT |
2213 | NS_ERR("unable to allocate core structures.\n"); |
2214 | return -ENOMEM; | |
2215 | } | |
ed10f165 | 2216 | nsmtd = nand_to_mtd(chip); |
1da177e4 | 2217 | nand = (struct nandsim *)(chip + 1); |
d699ed25 | 2218 | nand_set_controller_data(chip, (void *)nand); |
1da177e4 LT |
2219 | |
2220 | /* | |
2221 | * Register simulator's callbacks. | |
2222 | */ | |
7abd3ef9 | 2223 | chip->cmd_ctrl = ns_hwcontrol; |
1da177e4 LT |
2224 | chip->read_byte = ns_nand_read_byte; |
2225 | chip->dev_ready = ns_device_ready; | |
1da177e4 LT |
2226 | chip->write_buf = ns_nand_write_buf; |
2227 | chip->read_buf = ns_nand_read_buf; | |
1da177e4 | 2228 | chip->read_word = ns_nand_read_word; |
6dfc6d25 | 2229 | chip->ecc.mode = NAND_ECC_SOFT; |
8ae6bcd1 | 2230 | chip->ecc.algo = NAND_ECC_HAMMING; |
a5ac8aeb AH |
2231 | /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */ |
2232 | /* and 'badblocks' parameters to work */ | |
51502287 | 2233 | chip->options |= NAND_SKIP_BBTSCAN; |
1da177e4 | 2234 | |
ce85b79f SAS |
2235 | switch (bbt) { |
2236 | case 2: | |
a40f7341 | 2237 | chip->bbt_options |= NAND_BBT_NO_OOB; |
ce85b79f | 2238 | case 1: |
bb9ebd4e | 2239 | chip->bbt_options |= NAND_BBT_USE_FLASH; |
ce85b79f SAS |
2240 | case 0: |
2241 | break; | |
2242 | default: | |
2243 | NS_ERR("bbt has to be 0..2\n"); | |
2244 | retval = -EINVAL; | |
2245 | goto error; | |
2246 | } | |
61b03bd7 | 2247 | /* |
1da177e4 | 2248 | * Perform minimum nandsim structure initialization to handle |
61b03bd7 | 2249 | * the initial ID read command correctly |
1da177e4 | 2250 | */ |
b00358a5 AM |
2251 | if (id_bytes[6] != 0xFF || id_bytes[7] != 0xFF) |
2252 | nand->geom.idbytes = 8; | |
2253 | else if (id_bytes[4] != 0xFF || id_bytes[5] != 0xFF) | |
2254 | nand->geom.idbytes = 6; | |
2255 | else if (id_bytes[2] != 0xFF || id_bytes[3] != 0xFF) | |
1da177e4 LT |
2256 | nand->geom.idbytes = 4; |
2257 | else | |
2258 | nand->geom.idbytes = 2; | |
2259 | nand->regs.status = NS_STATUS_OK(nand); | |
2260 | nand->nxstate = STATE_UNKNOWN; | |
51148f1f | 2261 | nand->options |= OPT_PAGE512; /* temporary value */ |
b00358a5 | 2262 | memcpy(nand->ids, id_bytes, sizeof(nand->ids)); |
1da177e4 LT |
2263 | if (bus_width == 16) { |
2264 | nand->busw = 16; | |
2265 | chip->options |= NAND_BUSWIDTH_16; | |
2266 | } | |
2267 | ||
552d9205 DW |
2268 | nsmtd->owner = THIS_MODULE; |
2269 | ||
514087e7 AH |
2270 | if ((retval = parse_weakblocks()) != 0) |
2271 | goto error; | |
2272 | ||
2273 | if ((retval = parse_weakpages()) != 0) | |
2274 | goto error; | |
2275 | ||
2276 | if ((retval = parse_gravepages()) != 0) | |
2277 | goto error; | |
2278 | ||
fc2ff592 ID |
2279 | retval = nand_scan_ident(nsmtd, 1, NULL); |
2280 | if (retval) { | |
2281 | NS_ERR("cannot scan NAND Simulator device\n"); | |
fc2ff592 ID |
2282 | goto error; |
2283 | } | |
2284 | ||
2285 | if (bch) { | |
2286 | unsigned int eccsteps, eccbytes; | |
2287 | if (!mtd_nand_has_bch()) { | |
2288 | NS_ERR("BCH ECC support is disabled\n"); | |
2289 | retval = -EINVAL; | |
2290 | goto error; | |
2291 | } | |
2292 | /* use 512-byte ecc blocks */ | |
2293 | eccsteps = nsmtd->writesize/512; | |
2294 | eccbytes = (bch*13+7)/8; | |
2295 | /* do not bother supporting small page devices */ | |
2296 | if ((nsmtd->oobsize < 64) || !eccsteps) { | |
2297 | NS_ERR("bch not available on small page devices\n"); | |
2298 | retval = -EINVAL; | |
2299 | goto error; | |
2300 | } | |
2301 | if ((eccbytes*eccsteps+2) > nsmtd->oobsize) { | |
2302 | NS_ERR("invalid bch value %u\n", bch); | |
2303 | retval = -EINVAL; | |
2304 | goto error; | |
2305 | } | |
e4225ae8 | 2306 | chip->ecc.mode = NAND_ECC_SOFT; |
8ae6bcd1 | 2307 | chip->ecc.algo = NAND_ECC_BCH; |
fc2ff592 | 2308 | chip->ecc.size = 512; |
e0377cde | 2309 | chip->ecc.strength = bch; |
fc2ff592 ID |
2310 | chip->ecc.bytes = eccbytes; |
2311 | NS_INFO("using %u-bit/%u bytes BCH ECC\n", bch, chip->ecc.size); | |
2312 | } | |
2313 | ||
2314 | retval = nand_scan_tail(nsmtd); | |
2315 | if (retval) { | |
1da177e4 | 2316 | NS_ERR("can't register NAND Simulator\n"); |
1da177e4 LT |
2317 | goto error; |
2318 | } | |
2319 | ||
a5ac8aeb | 2320 | if (overridesize) { |
0f07a0be | 2321 | uint64_t new_size = (uint64_t)nsmtd->erasesize << overridesize; |
a5ac8aeb AH |
2322 | if (new_size >> overridesize != nsmtd->erasesize) { |
2323 | NS_ERR("overridesize is too big\n"); | |
bb0a13a1 | 2324 | retval = -EINVAL; |
a5ac8aeb AH |
2325 | goto err_exit; |
2326 | } | |
2327 | /* N.B. This relies on nand_scan not doing anything with the size before we change it */ | |
2328 | nsmtd->size = new_size; | |
2329 | chip->chipsize = new_size; | |
6eda7a55 | 2330 | chip->chip_shift = ffs(nsmtd->erasesize) + overridesize - 1; |
07293b20 | 2331 | chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; |
a5ac8aeb AH |
2332 | } |
2333 | ||
57aa6b54 AH |
2334 | if ((retval = setup_wear_reporting(nsmtd)) != 0) |
2335 | goto err_exit; | |
2336 | ||
2b77a0ed AH |
2337 | if ((retval = init_nandsim(nsmtd)) != 0) |
2338 | goto err_exit; | |
61b03bd7 | 2339 | |
4fd18ae4 | 2340 | if ((retval = chip->scan_bbt(nsmtd)) != 0) |
514087e7 AH |
2341 | goto err_exit; |
2342 | ||
ce85b79f | 2343 | if ((retval = parse_badblocks(nand, nsmtd)) != 0) |
2b77a0ed | 2344 | goto err_exit; |
51502287 | 2345 | |
2b77a0ed | 2346 | /* Register NAND partitions */ |
ee0e87b1 JI |
2347 | retval = mtd_device_register(nsmtd, &nand->partitions[0], |
2348 | nand->nbparts); | |
2349 | if (retval != 0) | |
2b77a0ed | 2350 | goto err_exit; |
1da177e4 | 2351 | |
e8e3edb9 MR |
2352 | if ((retval = nandsim_debugfs_create(nand)) != 0) |
2353 | goto err_exit; | |
2354 | ||
1da177e4 LT |
2355 | return 0; |
2356 | ||
2b77a0ed AH |
2357 | err_exit: |
2358 | free_nandsim(nand); | |
2359 | nand_release(nsmtd); | |
2360 | for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i) | |
2361 | kfree(nand->partitions[i].name); | |
1da177e4 | 2362 | error: |
ed10f165 | 2363 | kfree(chip); |
514087e7 | 2364 | free_lists(); |
1da177e4 LT |
2365 | |
2366 | return retval; | |
2367 | } | |
2368 | ||
2369 | module_init(ns_init_module); | |
2370 | ||
2371 | /* | |
2372 | * Module clean-up function | |
2373 | */ | |
2374 | static void __exit ns_cleanup_module(void) | |
2375 | { | |
c66b651c BN |
2376 | struct nand_chip *chip = mtd_to_nand(nsmtd); |
2377 | struct nandsim *ns = nand_get_controller_data(chip); | |
2b77a0ed | 2378 | int i; |
1da177e4 LT |
2379 | |
2380 | free_nandsim(ns); /* Free nandsim private resources */ | |
2b77a0ed AH |
2381 | nand_release(nsmtd); /* Unregister driver */ |
2382 | for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i) | |
2383 | kfree(ns->partitions[i].name); | |
ed10f165 | 2384 | kfree(mtd_to_nand(nsmtd)); /* Free other structures */ |
514087e7 | 2385 | free_lists(); |
1da177e4 LT |
2386 | } |
2387 | ||
2388 | module_exit(ns_cleanup_module); | |
2389 | ||
2390 | MODULE_LICENSE ("GPL"); | |
2391 | MODULE_AUTHOR ("Artem B. Bityuckiy"); | |
2392 | MODULE_DESCRIPTION ("The NAND flash simulator"); |