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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 | ||
1da177e4 LT |
26 | #include <linux/init.h> |
27 | #include <linux/types.h> | |
28 | #include <linux/module.h> | |
29 | #include <linux/moduleparam.h> | |
30 | #include <linux/vmalloc.h> | |
fc1f397b | 31 | #include <asm/div64.h> |
1da177e4 LT |
32 | #include <linux/slab.h> |
33 | #include <linux/errno.h> | |
34 | #include <linux/string.h> | |
35 | #include <linux/mtd/mtd.h> | |
36 | #include <linux/mtd/nand.h> | |
37 | #include <linux/mtd/partitions.h> | |
38 | #include <linux/delay.h> | |
2b77a0ed | 39 | #include <linux/list.h> |
514087e7 | 40 | #include <linux/random.h> |
a5cce42f | 41 | #include <linux/sched.h> |
a9fc8991 AH |
42 | #include <linux/fs.h> |
43 | #include <linux/pagemap.h> | |
1da177e4 LT |
44 | |
45 | /* Default simulator parameters values */ | |
46 | #if !defined(CONFIG_NANDSIM_FIRST_ID_BYTE) || \ | |
47 | !defined(CONFIG_NANDSIM_SECOND_ID_BYTE) || \ | |
48 | !defined(CONFIG_NANDSIM_THIRD_ID_BYTE) || \ | |
49 | !defined(CONFIG_NANDSIM_FOURTH_ID_BYTE) | |
50 | #define CONFIG_NANDSIM_FIRST_ID_BYTE 0x98 | |
51 | #define CONFIG_NANDSIM_SECOND_ID_BYTE 0x39 | |
52 | #define CONFIG_NANDSIM_THIRD_ID_BYTE 0xFF /* No byte */ | |
53 | #define CONFIG_NANDSIM_FOURTH_ID_BYTE 0xFF /* No byte */ | |
54 | #endif | |
55 | ||
56 | #ifndef CONFIG_NANDSIM_ACCESS_DELAY | |
57 | #define CONFIG_NANDSIM_ACCESS_DELAY 25 | |
58 | #endif | |
59 | #ifndef CONFIG_NANDSIM_PROGRAMM_DELAY | |
60 | #define CONFIG_NANDSIM_PROGRAMM_DELAY 200 | |
61 | #endif | |
62 | #ifndef CONFIG_NANDSIM_ERASE_DELAY | |
63 | #define CONFIG_NANDSIM_ERASE_DELAY 2 | |
64 | #endif | |
65 | #ifndef CONFIG_NANDSIM_OUTPUT_CYCLE | |
66 | #define CONFIG_NANDSIM_OUTPUT_CYCLE 40 | |
67 | #endif | |
68 | #ifndef CONFIG_NANDSIM_INPUT_CYCLE | |
69 | #define CONFIG_NANDSIM_INPUT_CYCLE 50 | |
70 | #endif | |
71 | #ifndef CONFIG_NANDSIM_BUS_WIDTH | |
72 | #define CONFIG_NANDSIM_BUS_WIDTH 8 | |
73 | #endif | |
74 | #ifndef CONFIG_NANDSIM_DO_DELAYS | |
75 | #define CONFIG_NANDSIM_DO_DELAYS 0 | |
76 | #endif | |
77 | #ifndef CONFIG_NANDSIM_LOG | |
78 | #define CONFIG_NANDSIM_LOG 0 | |
79 | #endif | |
80 | #ifndef CONFIG_NANDSIM_DBG | |
81 | #define CONFIG_NANDSIM_DBG 0 | |
82 | #endif | |
e99e90ae BH |
83 | #ifndef CONFIG_NANDSIM_MAX_PARTS |
84 | #define CONFIG_NANDSIM_MAX_PARTS 32 | |
85 | #endif | |
1da177e4 LT |
86 | |
87 | static uint first_id_byte = CONFIG_NANDSIM_FIRST_ID_BYTE; | |
88 | static uint second_id_byte = CONFIG_NANDSIM_SECOND_ID_BYTE; | |
89 | static uint third_id_byte = CONFIG_NANDSIM_THIRD_ID_BYTE; | |
90 | static uint fourth_id_byte = CONFIG_NANDSIM_FOURTH_ID_BYTE; | |
91 | static uint access_delay = CONFIG_NANDSIM_ACCESS_DELAY; | |
92 | static uint programm_delay = CONFIG_NANDSIM_PROGRAMM_DELAY; | |
93 | static uint erase_delay = CONFIG_NANDSIM_ERASE_DELAY; | |
94 | static uint output_cycle = CONFIG_NANDSIM_OUTPUT_CYCLE; | |
95 | static uint input_cycle = CONFIG_NANDSIM_INPUT_CYCLE; | |
96 | static uint bus_width = CONFIG_NANDSIM_BUS_WIDTH; | |
97 | static uint do_delays = CONFIG_NANDSIM_DO_DELAYS; | |
98 | static uint log = CONFIG_NANDSIM_LOG; | |
99 | static uint dbg = CONFIG_NANDSIM_DBG; | |
e99e90ae | 100 | static unsigned long parts[CONFIG_NANDSIM_MAX_PARTS]; |
2b77a0ed | 101 | static unsigned int parts_num; |
514087e7 AH |
102 | static char *badblocks = NULL; |
103 | static char *weakblocks = NULL; | |
104 | static char *weakpages = NULL; | |
105 | static unsigned int bitflips = 0; | |
106 | static char *gravepages = NULL; | |
57aa6b54 | 107 | static unsigned int rptwear = 0; |
a5ac8aeb | 108 | static unsigned int overridesize = 0; |
a9fc8991 | 109 | static char *cache_file = NULL; |
ce85b79f | 110 | static unsigned int bbt; |
1da177e4 LT |
111 | |
112 | module_param(first_id_byte, uint, 0400); | |
113 | module_param(second_id_byte, uint, 0400); | |
114 | module_param(third_id_byte, uint, 0400); | |
115 | module_param(fourth_id_byte, uint, 0400); | |
116 | module_param(access_delay, uint, 0400); | |
117 | module_param(programm_delay, uint, 0400); | |
118 | module_param(erase_delay, uint, 0400); | |
119 | module_param(output_cycle, uint, 0400); | |
120 | module_param(input_cycle, uint, 0400); | |
121 | module_param(bus_width, uint, 0400); | |
122 | module_param(do_delays, uint, 0400); | |
123 | module_param(log, uint, 0400); | |
124 | module_param(dbg, uint, 0400); | |
2b77a0ed | 125 | module_param_array(parts, ulong, &parts_num, 0400); |
514087e7 AH |
126 | module_param(badblocks, charp, 0400); |
127 | module_param(weakblocks, charp, 0400); | |
128 | module_param(weakpages, charp, 0400); | |
129 | module_param(bitflips, uint, 0400); | |
130 | module_param(gravepages, charp, 0400); | |
57aa6b54 | 131 | module_param(rptwear, uint, 0400); |
a5ac8aeb | 132 | module_param(overridesize, uint, 0400); |
a9fc8991 | 133 | module_param(cache_file, charp, 0400); |
ce85b79f | 134 | module_param(bbt, uint, 0400); |
1da177e4 | 135 | |
a5ac8aeb | 136 | MODULE_PARM_DESC(first_id_byte, "The first byte returned by NAND Flash 'read ID' command (manufacturer ID)"); |
1da177e4 LT |
137 | MODULE_PARM_DESC(second_id_byte, "The second byte returned by NAND Flash 'read ID' command (chip ID)"); |
138 | MODULE_PARM_DESC(third_id_byte, "The third byte returned by NAND Flash 'read ID' command"); | |
139 | MODULE_PARM_DESC(fourth_id_byte, "The fourth byte returned by NAND Flash 'read ID' command"); | |
a9fc8991 | 140 | MODULE_PARM_DESC(access_delay, "Initial page access delay (microseconds)"); |
1da177e4 LT |
141 | MODULE_PARM_DESC(programm_delay, "Page programm delay (microseconds"); |
142 | MODULE_PARM_DESC(erase_delay, "Sector erase delay (milliseconds)"); | |
6029a3a4 AY |
143 | MODULE_PARM_DESC(output_cycle, "Word output (from flash) time (nanoseconds)"); |
144 | MODULE_PARM_DESC(input_cycle, "Word input (to flash) time (nanoseconds)"); | |
1da177e4 LT |
145 | MODULE_PARM_DESC(bus_width, "Chip's bus width (8- or 16-bit)"); |
146 | MODULE_PARM_DESC(do_delays, "Simulate NAND delays using busy-waits if not zero"); | |
147 | MODULE_PARM_DESC(log, "Perform logging if not zero"); | |
148 | MODULE_PARM_DESC(dbg, "Output debug information if not zero"); | |
2b77a0ed | 149 | MODULE_PARM_DESC(parts, "Partition sizes (in erase blocks) separated by commas"); |
514087e7 AH |
150 | /* Page and erase block positions for the following parameters are independent of any partitions */ |
151 | MODULE_PARM_DESC(badblocks, "Erase blocks that are initially marked bad, separated by commas"); | |
152 | MODULE_PARM_DESC(weakblocks, "Weak erase blocks [: remaining erase cycles (defaults to 3)]" | |
153 | " separated by commas e.g. 113:2 means eb 113" | |
154 | " can be erased only twice before failing"); | |
155 | MODULE_PARM_DESC(weakpages, "Weak pages [: maximum writes (defaults to 3)]" | |
156 | " separated by commas e.g. 1401:2 means page 1401" | |
157 | " can be written only twice before failing"); | |
158 | MODULE_PARM_DESC(bitflips, "Maximum number of random bit flips per page (zero by default)"); | |
159 | MODULE_PARM_DESC(gravepages, "Pages that lose data [: maximum reads (defaults to 3)]" | |
160 | " separated by commas e.g. 1401:2 means page 1401" | |
161 | " can be read only twice before failing"); | |
57aa6b54 | 162 | MODULE_PARM_DESC(rptwear, "Number of erases inbetween reporting wear, if not zero"); |
a5ac8aeb AH |
163 | MODULE_PARM_DESC(overridesize, "Specifies the NAND Flash size overriding the ID bytes. " |
164 | "The size is specified in erase blocks and as the exponent of a power of two" | |
165 | " e.g. 5 means a size of 32 erase blocks"); | |
a9fc8991 | 166 | MODULE_PARM_DESC(cache_file, "File to use to cache nand pages instead of memory"); |
ce85b79f | 167 | MODULE_PARM_DESC(bbt, "0 OOB, 1 BBT with marker in OOB, 2 BBT with marker in data area"); |
1da177e4 LT |
168 | |
169 | /* The largest possible page size */ | |
75352662 | 170 | #define NS_LARGEST_PAGE_SIZE 4096 |
61b03bd7 | 171 | |
1da177e4 LT |
172 | /* The prefix for simulator output */ |
173 | #define NS_OUTPUT_PREFIX "[nandsim]" | |
174 | ||
175 | /* Simulator's output macros (logging, debugging, warning, error) */ | |
176 | #define NS_LOG(args...) \ | |
177 | do { if (log) printk(KERN_DEBUG NS_OUTPUT_PREFIX " log: " args); } while(0) | |
178 | #define NS_DBG(args...) \ | |
179 | do { if (dbg) printk(KERN_DEBUG NS_OUTPUT_PREFIX " debug: " args); } while(0) | |
180 | #define NS_WARN(args...) \ | |
2b77a0ed | 181 | do { printk(KERN_WARNING NS_OUTPUT_PREFIX " warning: " args); } while(0) |
1da177e4 | 182 | #define NS_ERR(args...) \ |
2b77a0ed | 183 | do { printk(KERN_ERR NS_OUTPUT_PREFIX " error: " args); } while(0) |
57aa6b54 AH |
184 | #define NS_INFO(args...) \ |
185 | do { printk(KERN_INFO NS_OUTPUT_PREFIX " " args); } while(0) | |
1da177e4 LT |
186 | |
187 | /* Busy-wait delay macros (microseconds, milliseconds) */ | |
188 | #define NS_UDELAY(us) \ | |
189 | do { if (do_delays) udelay(us); } while(0) | |
190 | #define NS_MDELAY(us) \ | |
191 | do { if (do_delays) mdelay(us); } while(0) | |
61b03bd7 | 192 | |
1da177e4 LT |
193 | /* Is the nandsim structure initialized ? */ |
194 | #define NS_IS_INITIALIZED(ns) ((ns)->geom.totsz != 0) | |
195 | ||
196 | /* Good operation completion status */ | |
197 | #define NS_STATUS_OK(ns) (NAND_STATUS_READY | (NAND_STATUS_WP * ((ns)->lines.wp == 0))) | |
198 | ||
199 | /* Operation failed completion status */ | |
61b03bd7 | 200 | #define NS_STATUS_FAILED(ns) (NAND_STATUS_FAIL | NS_STATUS_OK(ns)) |
1da177e4 LT |
201 | |
202 | /* Calculate the page offset in flash RAM image by (row, column) address */ | |
203 | #define NS_RAW_OFFSET(ns) \ | |
204 | (((ns)->regs.row << (ns)->geom.pgshift) + ((ns)->regs.row * (ns)->geom.oobsz) + (ns)->regs.column) | |
61b03bd7 | 205 | |
1da177e4 LT |
206 | /* Calculate the OOB offset in flash RAM image by (row, column) address */ |
207 | #define NS_RAW_OFFSET_OOB(ns) (NS_RAW_OFFSET(ns) + ns->geom.pgsz) | |
208 | ||
209 | /* After a command is input, the simulator goes to one of the following states */ | |
210 | #define STATE_CMD_READ0 0x00000001 /* read data from the beginning of page */ | |
211 | #define STATE_CMD_READ1 0x00000002 /* read data from the second half of page */ | |
4a0c50c0 | 212 | #define STATE_CMD_READSTART 0x00000003 /* read data second command (large page devices) */ |
1da177e4 LT |
213 | #define STATE_CMD_PAGEPROG 0x00000004 /* start page programm */ |
214 | #define STATE_CMD_READOOB 0x00000005 /* read OOB area */ | |
215 | #define STATE_CMD_ERASE1 0x00000006 /* sector erase first command */ | |
216 | #define STATE_CMD_STATUS 0x00000007 /* read status */ | |
217 | #define STATE_CMD_STATUS_M 0x00000008 /* read multi-plane status (isn't implemented) */ | |
218 | #define STATE_CMD_SEQIN 0x00000009 /* sequential data imput */ | |
219 | #define STATE_CMD_READID 0x0000000A /* read ID */ | |
220 | #define STATE_CMD_ERASE2 0x0000000B /* sector erase second command */ | |
221 | #define STATE_CMD_RESET 0x0000000C /* reset */ | |
74216be4 AB |
222 | #define STATE_CMD_RNDOUT 0x0000000D /* random output command */ |
223 | #define STATE_CMD_RNDOUTSTART 0x0000000E /* random output start command */ | |
1da177e4 LT |
224 | #define STATE_CMD_MASK 0x0000000F /* command states mask */ |
225 | ||
8e87d782 | 226 | /* After an address is input, the simulator goes to one of these states */ |
1da177e4 LT |
227 | #define STATE_ADDR_PAGE 0x00000010 /* full (row, column) address is accepted */ |
228 | #define STATE_ADDR_SEC 0x00000020 /* sector address was accepted */ | |
74216be4 AB |
229 | #define STATE_ADDR_COLUMN 0x00000030 /* column address was accepted */ |
230 | #define STATE_ADDR_ZERO 0x00000040 /* one byte zero address was accepted */ | |
231 | #define STATE_ADDR_MASK 0x00000070 /* address states mask */ | |
1da177e4 LT |
232 | |
233 | /* Durind data input/output the simulator is in these states */ | |
234 | #define STATE_DATAIN 0x00000100 /* waiting for data input */ | |
235 | #define STATE_DATAIN_MASK 0x00000100 /* data input states mask */ | |
236 | ||
237 | #define STATE_DATAOUT 0x00001000 /* waiting for page data output */ | |
238 | #define STATE_DATAOUT_ID 0x00002000 /* waiting for ID bytes output */ | |
239 | #define STATE_DATAOUT_STATUS 0x00003000 /* waiting for status output */ | |
240 | #define STATE_DATAOUT_STATUS_M 0x00004000 /* waiting for multi-plane status output */ | |
241 | #define STATE_DATAOUT_MASK 0x00007000 /* data output states mask */ | |
242 | ||
243 | /* Previous operation is done, ready to accept new requests */ | |
244 | #define STATE_READY 0x00000000 | |
245 | ||
246 | /* This state is used to mark that the next state isn't known yet */ | |
247 | #define STATE_UNKNOWN 0x10000000 | |
248 | ||
249 | /* Simulator's actions bit masks */ | |
250 | #define ACTION_CPY 0x00100000 /* copy page/OOB to the internal buffer */ | |
251 | #define ACTION_PRGPAGE 0x00200000 /* programm the internal buffer to flash */ | |
252 | #define ACTION_SECERASE 0x00300000 /* erase sector */ | |
253 | #define ACTION_ZEROOFF 0x00400000 /* don't add any offset to address */ | |
254 | #define ACTION_HALFOFF 0x00500000 /* add to address half of page */ | |
255 | #define ACTION_OOBOFF 0x00600000 /* add to address OOB offset */ | |
256 | #define ACTION_MASK 0x00700000 /* action mask */ | |
257 | ||
74216be4 | 258 | #define NS_OPER_NUM 13 /* Number of operations supported by the simulator */ |
1da177e4 LT |
259 | #define NS_OPER_STATES 6 /* Maximum number of states in operation */ |
260 | ||
261 | #define OPT_ANY 0xFFFFFFFF /* any chip supports this operation */ | |
262 | #define OPT_PAGE256 0x00000001 /* 256-byte page chips */ | |
263 | #define OPT_PAGE512 0x00000002 /* 512-byte page chips */ | |
264 | #define OPT_PAGE2048 0x00000008 /* 2048-byte page chips */ | |
265 | #define OPT_SMARTMEDIA 0x00000010 /* SmartMedia technology chips */ | |
266 | #define OPT_AUTOINCR 0x00000020 /* page number auto inctimentation is possible */ | |
267 | #define OPT_PAGE512_8BIT 0x00000040 /* 512-byte page chips with 8-bit bus width */ | |
75352662 SAS |
268 | #define OPT_PAGE4096 0x00000080 /* 4096-byte page chips */ |
269 | #define OPT_LARGEPAGE (OPT_PAGE2048 | OPT_PAGE4096) /* 2048 & 4096-byte page chips */ | |
1da177e4 LT |
270 | #define OPT_SMALLPAGE (OPT_PAGE256 | OPT_PAGE512) /* 256 and 512-byte page chips */ |
271 | ||
272 | /* Remove action bits ftom state */ | |
273 | #define NS_STATE(x) ((x) & ~ACTION_MASK) | |
61b03bd7 TG |
274 | |
275 | /* | |
1da177e4 LT |
276 | * Maximum previous states which need to be saved. Currently saving is |
277 | * only needed for page programm operation with preceeded read command | |
278 | * (which is only valid for 512-byte pages). | |
279 | */ | |
280 | #define NS_MAX_PREVSTATES 1 | |
281 | ||
a9fc8991 AH |
282 | /* Maximum page cache pages needed to read or write a NAND page to the cache_file */ |
283 | #define NS_MAX_HELD_PAGES 16 | |
284 | ||
d086d436 VK |
285 | /* |
286 | * A union to represent flash memory contents and flash buffer. | |
287 | */ | |
288 | union ns_mem { | |
289 | u_char *byte; /* for byte access */ | |
290 | uint16_t *word; /* for 16-bit word access */ | |
291 | }; | |
292 | ||
61b03bd7 | 293 | /* |
1da177e4 LT |
294 | * The structure which describes all the internal simulator data. |
295 | */ | |
296 | struct nandsim { | |
e99e90ae | 297 | struct mtd_partition partitions[CONFIG_NANDSIM_MAX_PARTS]; |
2b77a0ed | 298 | unsigned int nbparts; |
1da177e4 LT |
299 | |
300 | uint busw; /* flash chip bus width (8 or 16) */ | |
301 | u_char ids[4]; /* chip's ID bytes */ | |
302 | uint32_t options; /* chip's characteristic bits */ | |
303 | uint32_t state; /* current chip state */ | |
304 | uint32_t nxstate; /* next expected state */ | |
61b03bd7 | 305 | |
1da177e4 LT |
306 | uint32_t *op; /* current operation, NULL operations isn't known yet */ |
307 | uint32_t pstates[NS_MAX_PREVSTATES]; /* previous states */ | |
308 | uint16_t npstates; /* number of previous states saved */ | |
309 | uint16_t stateidx; /* current state index */ | |
310 | ||
d086d436 VK |
311 | /* The simulated NAND flash pages array */ |
312 | union ns_mem *pages; | |
1da177e4 | 313 | |
8a4c2495 AK |
314 | /* Slab allocator for nand pages */ |
315 | struct kmem_cache *nand_pages_slab; | |
316 | ||
1da177e4 | 317 | /* Internal buffer of page + OOB size bytes */ |
d086d436 | 318 | union ns_mem buf; |
1da177e4 LT |
319 | |
320 | /* NAND flash "geometry" */ | |
0bfa4df2 | 321 | struct { |
6eda7a55 | 322 | uint64_t totsz; /* total flash size, bytes */ |
1da177e4 LT |
323 | uint32_t secsz; /* flash sector (erase block) size, bytes */ |
324 | uint pgsz; /* NAND flash page size, bytes */ | |
325 | uint oobsz; /* page OOB area size, bytes */ | |
6eda7a55 | 326 | uint64_t totszoob; /* total flash size including OOB, bytes */ |
1da177e4 LT |
327 | uint pgszoob; /* page size including OOB , bytes*/ |
328 | uint secszoob; /* sector size including OOB, bytes */ | |
329 | uint pgnum; /* total number of pages */ | |
330 | uint pgsec; /* number of pages per sector */ | |
331 | uint secshift; /* bits number in sector size */ | |
332 | uint pgshift; /* bits number in page size */ | |
333 | uint oobshift; /* bits number in OOB size */ | |
334 | uint pgaddrbytes; /* bytes per page address */ | |
335 | uint secaddrbytes; /* bytes per sector address */ | |
336 | uint idbytes; /* the number ID bytes that this chip outputs */ | |
337 | } geom; | |
338 | ||
339 | /* NAND flash internal registers */ | |
0bfa4df2 | 340 | struct { |
1da177e4 LT |
341 | unsigned command; /* the command register */ |
342 | u_char status; /* the status register */ | |
343 | uint row; /* the page number */ | |
344 | uint column; /* the offset within page */ | |
345 | uint count; /* internal counter */ | |
346 | uint num; /* number of bytes which must be processed */ | |
347 | uint off; /* fixed page offset */ | |
348 | } regs; | |
349 | ||
350 | /* NAND flash lines state */ | |
0bfa4df2 | 351 | struct { |
1da177e4 LT |
352 | int ce; /* chip Enable */ |
353 | int cle; /* command Latch Enable */ | |
354 | int ale; /* address Latch Enable */ | |
355 | int wp; /* write Protect */ | |
356 | } lines; | |
a9fc8991 AH |
357 | |
358 | /* Fields needed when using a cache file */ | |
359 | struct file *cfile; /* Open file */ | |
360 | unsigned char *pages_written; /* Which pages have been written */ | |
361 | void *file_buf; | |
362 | struct page *held_pages[NS_MAX_HELD_PAGES]; | |
363 | int held_cnt; | |
1da177e4 LT |
364 | }; |
365 | ||
366 | /* | |
367 | * Operations array. To perform any operation the simulator must pass | |
368 | * through the correspondent states chain. | |
369 | */ | |
370 | static struct nandsim_operations { | |
371 | uint32_t reqopts; /* options which are required to perform the operation */ | |
372 | uint32_t states[NS_OPER_STATES]; /* operation's states */ | |
373 | } ops[NS_OPER_NUM] = { | |
374 | /* Read page + OOB from the beginning */ | |
375 | {OPT_SMALLPAGE, {STATE_CMD_READ0 | ACTION_ZEROOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
376 | STATE_DATAOUT, STATE_READY}}, | |
377 | /* Read page + OOB from the second half */ | |
378 | {OPT_PAGE512_8BIT, {STATE_CMD_READ1 | ACTION_HALFOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
379 | STATE_DATAOUT, STATE_READY}}, | |
380 | /* Read OOB */ | |
381 | {OPT_SMALLPAGE, {STATE_CMD_READOOB | ACTION_OOBOFF, STATE_ADDR_PAGE | ACTION_CPY, | |
382 | STATE_DATAOUT, STATE_READY}}, | |
383 | /* Programm page starting from the beginning */ | |
384 | {OPT_ANY, {STATE_CMD_SEQIN, STATE_ADDR_PAGE, STATE_DATAIN, | |
385 | STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
386 | /* Programm page starting from the beginning */ | |
387 | {OPT_SMALLPAGE, {STATE_CMD_READ0, STATE_CMD_SEQIN | ACTION_ZEROOFF, STATE_ADDR_PAGE, | |
388 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
389 | /* Programm page starting from the second half */ | |
390 | {OPT_PAGE512, {STATE_CMD_READ1, STATE_CMD_SEQIN | ACTION_HALFOFF, STATE_ADDR_PAGE, | |
391 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
392 | /* Programm OOB */ | |
393 | {OPT_SMALLPAGE, {STATE_CMD_READOOB, STATE_CMD_SEQIN | ACTION_OOBOFF, STATE_ADDR_PAGE, | |
394 | STATE_DATAIN, STATE_CMD_PAGEPROG | ACTION_PRGPAGE, STATE_READY}}, | |
395 | /* Erase sector */ | |
396 | {OPT_ANY, {STATE_CMD_ERASE1, STATE_ADDR_SEC, STATE_CMD_ERASE2 | ACTION_SECERASE, STATE_READY}}, | |
397 | /* Read status */ | |
398 | {OPT_ANY, {STATE_CMD_STATUS, STATE_DATAOUT_STATUS, STATE_READY}}, | |
399 | /* Read multi-plane status */ | |
400 | {OPT_SMARTMEDIA, {STATE_CMD_STATUS_M, STATE_DATAOUT_STATUS_M, STATE_READY}}, | |
401 | /* Read ID */ | |
402 | {OPT_ANY, {STATE_CMD_READID, STATE_ADDR_ZERO, STATE_DATAOUT_ID, STATE_READY}}, | |
403 | /* Large page devices read page */ | |
404 | {OPT_LARGEPAGE, {STATE_CMD_READ0, STATE_ADDR_PAGE, STATE_CMD_READSTART | ACTION_CPY, | |
74216be4 AB |
405 | STATE_DATAOUT, STATE_READY}}, |
406 | /* Large page devices random page read */ | |
407 | {OPT_LARGEPAGE, {STATE_CMD_RNDOUT, STATE_ADDR_COLUMN, STATE_CMD_RNDOUTSTART | ACTION_CPY, | |
408 | STATE_DATAOUT, STATE_READY}}, | |
1da177e4 LT |
409 | }; |
410 | ||
514087e7 AH |
411 | struct weak_block { |
412 | struct list_head list; | |
413 | unsigned int erase_block_no; | |
414 | unsigned int max_erases; | |
415 | unsigned int erases_done; | |
416 | }; | |
417 | ||
418 | static LIST_HEAD(weak_blocks); | |
419 | ||
420 | struct weak_page { | |
421 | struct list_head list; | |
422 | unsigned int page_no; | |
423 | unsigned int max_writes; | |
424 | unsigned int writes_done; | |
425 | }; | |
426 | ||
427 | static LIST_HEAD(weak_pages); | |
428 | ||
429 | struct grave_page { | |
430 | struct list_head list; | |
431 | unsigned int page_no; | |
432 | unsigned int max_reads; | |
433 | unsigned int reads_done; | |
434 | }; | |
435 | ||
436 | static LIST_HEAD(grave_pages); | |
437 | ||
57aa6b54 AH |
438 | static unsigned long *erase_block_wear = NULL; |
439 | static unsigned int wear_eb_count = 0; | |
440 | static unsigned long total_wear = 0; | |
441 | static unsigned int rptwear_cnt = 0; | |
442 | ||
1da177e4 LT |
443 | /* MTD structure for NAND controller */ |
444 | static struct mtd_info *nsmtd; | |
445 | ||
446 | static u_char ns_verify_buf[NS_LARGEST_PAGE_SIZE]; | |
447 | ||
d086d436 | 448 | /* |
8a4c2495 AK |
449 | * Allocate array of page pointers, create slab allocation for an array |
450 | * and initialize the array by NULL pointers. | |
d086d436 VK |
451 | * |
452 | * RETURNS: 0 if success, -ENOMEM if memory alloc fails. | |
453 | */ | |
a5602146 | 454 | static int alloc_device(struct nandsim *ns) |
d086d436 | 455 | { |
a9fc8991 AH |
456 | struct file *cfile; |
457 | int i, err; | |
458 | ||
459 | if (cache_file) { | |
460 | cfile = filp_open(cache_file, O_CREAT | O_RDWR | O_LARGEFILE, 0600); | |
461 | if (IS_ERR(cfile)) | |
462 | return PTR_ERR(cfile); | |
463 | if (!cfile->f_op || (!cfile->f_op->read && !cfile->f_op->aio_read)) { | |
464 | NS_ERR("alloc_device: cache file not readable\n"); | |
465 | err = -EINVAL; | |
466 | goto err_close; | |
467 | } | |
468 | if (!cfile->f_op->write && !cfile->f_op->aio_write) { | |
469 | NS_ERR("alloc_device: cache file not writeable\n"); | |
470 | err = -EINVAL; | |
471 | goto err_close; | |
472 | } | |
473 | ns->pages_written = vmalloc(ns->geom.pgnum); | |
474 | if (!ns->pages_written) { | |
475 | NS_ERR("alloc_device: unable to allocate pages written array\n"); | |
476 | err = -ENOMEM; | |
477 | goto err_close; | |
478 | } | |
479 | ns->file_buf = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
480 | if (!ns->file_buf) { | |
481 | NS_ERR("alloc_device: unable to allocate file buf\n"); | |
482 | err = -ENOMEM; | |
483 | goto err_free; | |
484 | } | |
485 | ns->cfile = cfile; | |
486 | memset(ns->pages_written, 0, ns->geom.pgnum); | |
487 | return 0; | |
488 | } | |
d086d436 VK |
489 | |
490 | ns->pages = vmalloc(ns->geom.pgnum * sizeof(union ns_mem)); | |
491 | if (!ns->pages) { | |
a9fc8991 | 492 | NS_ERR("alloc_device: unable to allocate page array\n"); |
d086d436 VK |
493 | return -ENOMEM; |
494 | } | |
495 | for (i = 0; i < ns->geom.pgnum; i++) { | |
496 | ns->pages[i].byte = NULL; | |
497 | } | |
8a4c2495 AK |
498 | ns->nand_pages_slab = kmem_cache_create("nandsim", |
499 | ns->geom.pgszoob, 0, 0, NULL); | |
500 | if (!ns->nand_pages_slab) { | |
501 | NS_ERR("cache_create: unable to create kmem_cache\n"); | |
502 | return -ENOMEM; | |
503 | } | |
d086d436 VK |
504 | |
505 | return 0; | |
a9fc8991 AH |
506 | |
507 | err_free: | |
508 | vfree(ns->pages_written); | |
509 | err_close: | |
510 | filp_close(cfile, NULL); | |
511 | return err; | |
d086d436 VK |
512 | } |
513 | ||
514 | /* | |
515 | * Free any allocated pages, and free the array of page pointers. | |
516 | */ | |
a5602146 | 517 | static void free_device(struct nandsim *ns) |
d086d436 VK |
518 | { |
519 | int i; | |
520 | ||
a9fc8991 AH |
521 | if (ns->cfile) { |
522 | kfree(ns->file_buf); | |
523 | vfree(ns->pages_written); | |
524 | filp_close(ns->cfile, NULL); | |
525 | return; | |
526 | } | |
527 | ||
d086d436 VK |
528 | if (ns->pages) { |
529 | for (i = 0; i < ns->geom.pgnum; i++) { | |
530 | if (ns->pages[i].byte) | |
8a4c2495 AK |
531 | kmem_cache_free(ns->nand_pages_slab, |
532 | ns->pages[i].byte); | |
d086d436 | 533 | } |
8a4c2495 | 534 | kmem_cache_destroy(ns->nand_pages_slab); |
d086d436 VK |
535 | vfree(ns->pages); |
536 | } | |
537 | } | |
538 | ||
2b77a0ed AH |
539 | static char *get_partition_name(int i) |
540 | { | |
541 | char buf[64]; | |
542 | sprintf(buf, "NAND simulator partition %d", i); | |
543 | return kstrdup(buf, GFP_KERNEL); | |
544 | } | |
545 | ||
0f07a0be | 546 | static uint64_t divide(uint64_t n, uint32_t d) |
6eda7a55 AH |
547 | { |
548 | do_div(n, d); | |
549 | return n; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | /* |
553 | * Initialize the nandsim structure. | |
554 | * | |
555 | * RETURNS: 0 if success, -ERRNO if failure. | |
556 | */ | |
a5602146 | 557 | static int init_nandsim(struct mtd_info *mtd) |
1da177e4 | 558 | { |
7b8516b7 KV |
559 | struct nand_chip *chip = mtd->priv; |
560 | struct nandsim *ns = chip->priv; | |
2b77a0ed | 561 | int i, ret = 0; |
0f07a0be DW |
562 | uint64_t remains; |
563 | uint64_t next_offset; | |
1da177e4 LT |
564 | |
565 | if (NS_IS_INITIALIZED(ns)) { | |
566 | NS_ERR("init_nandsim: nandsim is already initialized\n"); | |
567 | return -EIO; | |
568 | } | |
569 | ||
570 | /* Force mtd to not do delays */ | |
571 | chip->chip_delay = 0; | |
572 | ||
573 | /* Initialize the NAND flash parameters */ | |
574 | ns->busw = chip->options & NAND_BUSWIDTH_16 ? 16 : 8; | |
575 | ns->geom.totsz = mtd->size; | |
28318776 | 576 | ns->geom.pgsz = mtd->writesize; |
1da177e4 LT |
577 | ns->geom.oobsz = mtd->oobsize; |
578 | ns->geom.secsz = mtd->erasesize; | |
579 | ns->geom.pgszoob = ns->geom.pgsz + ns->geom.oobsz; | |
6eda7a55 AH |
580 | ns->geom.pgnum = divide(ns->geom.totsz, ns->geom.pgsz); |
581 | ns->geom.totszoob = ns->geom.totsz + (uint64_t)ns->geom.pgnum * ns->geom.oobsz; | |
1da177e4 LT |
582 | ns->geom.secshift = ffs(ns->geom.secsz) - 1; |
583 | ns->geom.pgshift = chip->page_shift; | |
584 | ns->geom.oobshift = ffs(ns->geom.oobsz) - 1; | |
585 | ns->geom.pgsec = ns->geom.secsz / ns->geom.pgsz; | |
586 | ns->geom.secszoob = ns->geom.secsz + ns->geom.oobsz * ns->geom.pgsec; | |
587 | ns->options = 0; | |
588 | ||
589 | if (ns->geom.pgsz == 256) { | |
590 | ns->options |= OPT_PAGE256; | |
591 | } | |
592 | else if (ns->geom.pgsz == 512) { | |
593 | ns->options |= (OPT_PAGE512 | OPT_AUTOINCR); | |
594 | if (ns->busw == 8) | |
595 | ns->options |= OPT_PAGE512_8BIT; | |
596 | } else if (ns->geom.pgsz == 2048) { | |
597 | ns->options |= OPT_PAGE2048; | |
75352662 SAS |
598 | } else if (ns->geom.pgsz == 4096) { |
599 | ns->options |= OPT_PAGE4096; | |
1da177e4 LT |
600 | } else { |
601 | NS_ERR("init_nandsim: unknown page size %u\n", ns->geom.pgsz); | |
602 | return -EIO; | |
603 | } | |
604 | ||
605 | if (ns->options & OPT_SMALLPAGE) { | |
af3deccf | 606 | if (ns->geom.totsz <= (32 << 20)) { |
1da177e4 LT |
607 | ns->geom.pgaddrbytes = 3; |
608 | ns->geom.secaddrbytes = 2; | |
609 | } else { | |
610 | ns->geom.pgaddrbytes = 4; | |
611 | ns->geom.secaddrbytes = 3; | |
612 | } | |
613 | } else { | |
614 | if (ns->geom.totsz <= (128 << 20)) { | |
4a0c50c0 | 615 | ns->geom.pgaddrbytes = 4; |
1da177e4 LT |
616 | ns->geom.secaddrbytes = 2; |
617 | } else { | |
618 | ns->geom.pgaddrbytes = 5; | |
619 | ns->geom.secaddrbytes = 3; | |
620 | } | |
621 | } | |
61b03bd7 | 622 | |
2b77a0ed AH |
623 | /* Fill the partition_info structure */ |
624 | if (parts_num > ARRAY_SIZE(ns->partitions)) { | |
625 | NS_ERR("too many partitions.\n"); | |
626 | ret = -EINVAL; | |
627 | goto error; | |
628 | } | |
629 | remains = ns->geom.totsz; | |
630 | next_offset = 0; | |
631 | for (i = 0; i < parts_num; ++i) { | |
0f07a0be | 632 | uint64_t part_sz = (uint64_t)parts[i] * ns->geom.secsz; |
6eda7a55 AH |
633 | |
634 | if (!part_sz || part_sz > remains) { | |
2b77a0ed AH |
635 | NS_ERR("bad partition size.\n"); |
636 | ret = -EINVAL; | |
637 | goto error; | |
638 | } | |
639 | ns->partitions[i].name = get_partition_name(i); | |
640 | ns->partitions[i].offset = next_offset; | |
6eda7a55 | 641 | ns->partitions[i].size = part_sz; |
2b77a0ed AH |
642 | next_offset += ns->partitions[i].size; |
643 | remains -= ns->partitions[i].size; | |
644 | } | |
645 | ns->nbparts = parts_num; | |
646 | if (remains) { | |
647 | if (parts_num + 1 > ARRAY_SIZE(ns->partitions)) { | |
648 | NS_ERR("too many partitions.\n"); | |
649 | ret = -EINVAL; | |
650 | goto error; | |
651 | } | |
652 | ns->partitions[i].name = get_partition_name(i); | |
653 | ns->partitions[i].offset = next_offset; | |
654 | ns->partitions[i].size = remains; | |
655 | ns->nbparts += 1; | |
656 | } | |
657 | ||
1da177e4 LT |
658 | /* Detect how many ID bytes the NAND chip outputs */ |
659 | for (i = 0; nand_flash_ids[i].name != NULL; i++) { | |
660 | if (second_id_byte != nand_flash_ids[i].id) | |
661 | continue; | |
662 | if (!(nand_flash_ids[i].options & NAND_NO_AUTOINCR)) | |
663 | ns->options |= OPT_AUTOINCR; | |
664 | } | |
665 | ||
666 | if (ns->busw == 16) | |
667 | NS_WARN("16-bit flashes support wasn't tested\n"); | |
668 | ||
e4c094a5 AM |
669 | printk("flash size: %llu MiB\n", |
670 | (unsigned long long)ns->geom.totsz >> 20); | |
1da177e4 LT |
671 | printk("page size: %u bytes\n", ns->geom.pgsz); |
672 | printk("OOB area size: %u bytes\n", ns->geom.oobsz); | |
673 | printk("sector size: %u KiB\n", ns->geom.secsz >> 10); | |
674 | printk("pages number: %u\n", ns->geom.pgnum); | |
675 | printk("pages per sector: %u\n", ns->geom.pgsec); | |
676 | printk("bus width: %u\n", ns->busw); | |
677 | printk("bits in sector size: %u\n", ns->geom.secshift); | |
678 | printk("bits in page size: %u\n", ns->geom.pgshift); | |
e4c094a5 AM |
679 | printk("bits in OOB size: %u\n", ns->geom.oobshift); |
680 | printk("flash size with OOB: %llu KiB\n", | |
681 | (unsigned long long)ns->geom.totszoob >> 10); | |
1da177e4 LT |
682 | printk("page address bytes: %u\n", ns->geom.pgaddrbytes); |
683 | printk("sector address bytes: %u\n", ns->geom.secaddrbytes); | |
684 | printk("options: %#x\n", ns->options); | |
685 | ||
2b77a0ed | 686 | if ((ret = alloc_device(ns)) != 0) |
d086d436 | 687 | goto error; |
1da177e4 LT |
688 | |
689 | /* Allocate / initialize the internal buffer */ | |
690 | ns->buf.byte = kmalloc(ns->geom.pgszoob, GFP_KERNEL); | |
691 | if (!ns->buf.byte) { | |
692 | NS_ERR("init_nandsim: unable to allocate %u bytes for the internal buffer\n", | |
693 | ns->geom.pgszoob); | |
2b77a0ed | 694 | ret = -ENOMEM; |
1da177e4 LT |
695 | goto error; |
696 | } | |
697 | memset(ns->buf.byte, 0xFF, ns->geom.pgszoob); | |
698 | ||
1da177e4 LT |
699 | return 0; |
700 | ||
701 | error: | |
d086d436 | 702 | free_device(ns); |
1da177e4 | 703 | |
2b77a0ed | 704 | return ret; |
1da177e4 LT |
705 | } |
706 | ||
707 | /* | |
708 | * Free the nandsim structure. | |
709 | */ | |
a5602146 | 710 | static void free_nandsim(struct nandsim *ns) |
1da177e4 LT |
711 | { |
712 | kfree(ns->buf.byte); | |
d086d436 | 713 | free_device(ns); |
1da177e4 LT |
714 | |
715 | return; | |
716 | } | |
717 | ||
514087e7 AH |
718 | static int parse_badblocks(struct nandsim *ns, struct mtd_info *mtd) |
719 | { | |
720 | char *w; | |
721 | int zero_ok; | |
722 | unsigned int erase_block_no; | |
723 | loff_t offset; | |
724 | ||
725 | if (!badblocks) | |
726 | return 0; | |
727 | w = badblocks; | |
728 | do { | |
729 | zero_ok = (*w == '0' ? 1 : 0); | |
730 | erase_block_no = simple_strtoul(w, &w, 0); | |
731 | if (!zero_ok && !erase_block_no) { | |
732 | NS_ERR("invalid badblocks.\n"); | |
733 | return -EINVAL; | |
734 | } | |
735 | offset = erase_block_no * ns->geom.secsz; | |
736 | if (mtd->block_markbad(mtd, offset)) { | |
737 | NS_ERR("invalid badblocks.\n"); | |
738 | return -EINVAL; | |
739 | } | |
740 | if (*w == ',') | |
741 | w += 1; | |
742 | } while (*w); | |
743 | return 0; | |
744 | } | |
745 | ||
746 | static int parse_weakblocks(void) | |
747 | { | |
748 | char *w; | |
749 | int zero_ok; | |
750 | unsigned int erase_block_no; | |
751 | unsigned int max_erases; | |
752 | struct weak_block *wb; | |
753 | ||
754 | if (!weakblocks) | |
755 | return 0; | |
756 | w = weakblocks; | |
757 | do { | |
758 | zero_ok = (*w == '0' ? 1 : 0); | |
759 | erase_block_no = simple_strtoul(w, &w, 0); | |
760 | if (!zero_ok && !erase_block_no) { | |
761 | NS_ERR("invalid weakblocks.\n"); | |
762 | return -EINVAL; | |
763 | } | |
764 | max_erases = 3; | |
765 | if (*w == ':') { | |
766 | w += 1; | |
767 | max_erases = simple_strtoul(w, &w, 0); | |
768 | } | |
769 | if (*w == ',') | |
770 | w += 1; | |
771 | wb = kzalloc(sizeof(*wb), GFP_KERNEL); | |
772 | if (!wb) { | |
773 | NS_ERR("unable to allocate memory.\n"); | |
774 | return -ENOMEM; | |
775 | } | |
776 | wb->erase_block_no = erase_block_no; | |
777 | wb->max_erases = max_erases; | |
778 | list_add(&wb->list, &weak_blocks); | |
779 | } while (*w); | |
780 | return 0; | |
781 | } | |
782 | ||
783 | static int erase_error(unsigned int erase_block_no) | |
784 | { | |
785 | struct weak_block *wb; | |
786 | ||
787 | list_for_each_entry(wb, &weak_blocks, list) | |
788 | if (wb->erase_block_no == erase_block_no) { | |
789 | if (wb->erases_done >= wb->max_erases) | |
790 | return 1; | |
791 | wb->erases_done += 1; | |
792 | return 0; | |
793 | } | |
794 | return 0; | |
795 | } | |
796 | ||
797 | static int parse_weakpages(void) | |
798 | { | |
799 | char *w; | |
800 | int zero_ok; | |
801 | unsigned int page_no; | |
802 | unsigned int max_writes; | |
803 | struct weak_page *wp; | |
804 | ||
805 | if (!weakpages) | |
806 | return 0; | |
807 | w = weakpages; | |
808 | do { | |
809 | zero_ok = (*w == '0' ? 1 : 0); | |
810 | page_no = simple_strtoul(w, &w, 0); | |
811 | if (!zero_ok && !page_no) { | |
812 | NS_ERR("invalid weakpagess.\n"); | |
813 | return -EINVAL; | |
814 | } | |
815 | max_writes = 3; | |
816 | if (*w == ':') { | |
817 | w += 1; | |
818 | max_writes = simple_strtoul(w, &w, 0); | |
819 | } | |
820 | if (*w == ',') | |
821 | w += 1; | |
822 | wp = kzalloc(sizeof(*wp), GFP_KERNEL); | |
823 | if (!wp) { | |
824 | NS_ERR("unable to allocate memory.\n"); | |
825 | return -ENOMEM; | |
826 | } | |
827 | wp->page_no = page_no; | |
828 | wp->max_writes = max_writes; | |
829 | list_add(&wp->list, &weak_pages); | |
830 | } while (*w); | |
831 | return 0; | |
832 | } | |
833 | ||
834 | static int write_error(unsigned int page_no) | |
835 | { | |
836 | struct weak_page *wp; | |
837 | ||
838 | list_for_each_entry(wp, &weak_pages, list) | |
839 | if (wp->page_no == page_no) { | |
840 | if (wp->writes_done >= wp->max_writes) | |
841 | return 1; | |
842 | wp->writes_done += 1; | |
843 | return 0; | |
844 | } | |
845 | return 0; | |
846 | } | |
847 | ||
848 | static int parse_gravepages(void) | |
849 | { | |
850 | char *g; | |
851 | int zero_ok; | |
852 | unsigned int page_no; | |
853 | unsigned int max_reads; | |
854 | struct grave_page *gp; | |
855 | ||
856 | if (!gravepages) | |
857 | return 0; | |
858 | g = gravepages; | |
859 | do { | |
860 | zero_ok = (*g == '0' ? 1 : 0); | |
861 | page_no = simple_strtoul(g, &g, 0); | |
862 | if (!zero_ok && !page_no) { | |
863 | NS_ERR("invalid gravepagess.\n"); | |
864 | return -EINVAL; | |
865 | } | |
866 | max_reads = 3; | |
867 | if (*g == ':') { | |
868 | g += 1; | |
869 | max_reads = simple_strtoul(g, &g, 0); | |
870 | } | |
871 | if (*g == ',') | |
872 | g += 1; | |
873 | gp = kzalloc(sizeof(*gp), GFP_KERNEL); | |
874 | if (!gp) { | |
875 | NS_ERR("unable to allocate memory.\n"); | |
876 | return -ENOMEM; | |
877 | } | |
878 | gp->page_no = page_no; | |
879 | gp->max_reads = max_reads; | |
880 | list_add(&gp->list, &grave_pages); | |
881 | } while (*g); | |
882 | return 0; | |
883 | } | |
884 | ||
885 | static int read_error(unsigned int page_no) | |
886 | { | |
887 | struct grave_page *gp; | |
888 | ||
889 | list_for_each_entry(gp, &grave_pages, list) | |
890 | if (gp->page_no == page_no) { | |
891 | if (gp->reads_done >= gp->max_reads) | |
892 | return 1; | |
893 | gp->reads_done += 1; | |
894 | return 0; | |
895 | } | |
896 | return 0; | |
897 | } | |
898 | ||
899 | static void free_lists(void) | |
900 | { | |
901 | struct list_head *pos, *n; | |
902 | list_for_each_safe(pos, n, &weak_blocks) { | |
903 | list_del(pos); | |
904 | kfree(list_entry(pos, struct weak_block, list)); | |
905 | } | |
906 | list_for_each_safe(pos, n, &weak_pages) { | |
907 | list_del(pos); | |
908 | kfree(list_entry(pos, struct weak_page, list)); | |
909 | } | |
910 | list_for_each_safe(pos, n, &grave_pages) { | |
911 | list_del(pos); | |
912 | kfree(list_entry(pos, struct grave_page, list)); | |
913 | } | |
57aa6b54 AH |
914 | kfree(erase_block_wear); |
915 | } | |
916 | ||
917 | static int setup_wear_reporting(struct mtd_info *mtd) | |
918 | { | |
919 | size_t mem; | |
920 | ||
921 | if (!rptwear) | |
922 | return 0; | |
6eda7a55 | 923 | wear_eb_count = divide(mtd->size, mtd->erasesize); |
57aa6b54 AH |
924 | mem = wear_eb_count * sizeof(unsigned long); |
925 | if (mem / sizeof(unsigned long) != wear_eb_count) { | |
926 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
927 | return -ENOMEM; | |
928 | } | |
929 | erase_block_wear = kzalloc(mem, GFP_KERNEL); | |
930 | if (!erase_block_wear) { | |
931 | NS_ERR("Too many erase blocks for wear reporting\n"); | |
932 | return -ENOMEM; | |
933 | } | |
934 | return 0; | |
935 | } | |
936 | ||
937 | static void update_wear(unsigned int erase_block_no) | |
938 | { | |
939 | unsigned long wmin = -1, wmax = 0, avg; | |
940 | unsigned long deciles[10], decile_max[10], tot = 0; | |
941 | unsigned int i; | |
942 | ||
943 | if (!erase_block_wear) | |
944 | return; | |
945 | total_wear += 1; | |
946 | if (total_wear == 0) | |
947 | NS_ERR("Erase counter total overflow\n"); | |
948 | erase_block_wear[erase_block_no] += 1; | |
949 | if (erase_block_wear[erase_block_no] == 0) | |
950 | NS_ERR("Erase counter overflow for erase block %u\n", erase_block_no); | |
951 | rptwear_cnt += 1; | |
952 | if (rptwear_cnt < rptwear) | |
953 | return; | |
954 | rptwear_cnt = 0; | |
955 | /* Calc wear stats */ | |
956 | for (i = 0; i < wear_eb_count; ++i) { | |
957 | unsigned long wear = erase_block_wear[i]; | |
958 | if (wear < wmin) | |
959 | wmin = wear; | |
960 | if (wear > wmax) | |
961 | wmax = wear; | |
962 | tot += wear; | |
963 | } | |
964 | for (i = 0; i < 9; ++i) { | |
965 | deciles[i] = 0; | |
966 | decile_max[i] = (wmax * (i + 1) + 5) / 10; | |
967 | } | |
968 | deciles[9] = 0; | |
969 | decile_max[9] = wmax; | |
970 | for (i = 0; i < wear_eb_count; ++i) { | |
971 | int d; | |
972 | unsigned long wear = erase_block_wear[i]; | |
973 | for (d = 0; d < 10; ++d) | |
974 | if (wear <= decile_max[d]) { | |
975 | deciles[d] += 1; | |
976 | break; | |
977 | } | |
978 | } | |
979 | avg = tot / wear_eb_count; | |
980 | /* Output wear report */ | |
981 | NS_INFO("*** Wear Report ***\n"); | |
982 | NS_INFO("Total numbers of erases: %lu\n", tot); | |
983 | NS_INFO("Number of erase blocks: %u\n", wear_eb_count); | |
984 | NS_INFO("Average number of erases: %lu\n", avg); | |
985 | NS_INFO("Maximum number of erases: %lu\n", wmax); | |
986 | NS_INFO("Minimum number of erases: %lu\n", wmin); | |
987 | for (i = 0; i < 10; ++i) { | |
988 | unsigned long from = (i ? decile_max[i - 1] + 1 : 0); | |
989 | if (from > decile_max[i]) | |
990 | continue; | |
991 | NS_INFO("Number of ebs with erase counts from %lu to %lu : %lu\n", | |
992 | from, | |
993 | decile_max[i], | |
994 | deciles[i]); | |
995 | } | |
996 | NS_INFO("*** End of Wear Report ***\n"); | |
514087e7 AH |
997 | } |
998 | ||
1da177e4 LT |
999 | /* |
1000 | * Returns the string representation of 'state' state. | |
1001 | */ | |
a5602146 | 1002 | static char *get_state_name(uint32_t state) |
1da177e4 LT |
1003 | { |
1004 | switch (NS_STATE(state)) { | |
1005 | case STATE_CMD_READ0: | |
1006 | return "STATE_CMD_READ0"; | |
1007 | case STATE_CMD_READ1: | |
1008 | return "STATE_CMD_READ1"; | |
1009 | case STATE_CMD_PAGEPROG: | |
1010 | return "STATE_CMD_PAGEPROG"; | |
1011 | case STATE_CMD_READOOB: | |
1012 | return "STATE_CMD_READOOB"; | |
1013 | case STATE_CMD_READSTART: | |
1014 | return "STATE_CMD_READSTART"; | |
1015 | case STATE_CMD_ERASE1: | |
1016 | return "STATE_CMD_ERASE1"; | |
1017 | case STATE_CMD_STATUS: | |
1018 | return "STATE_CMD_STATUS"; | |
1019 | case STATE_CMD_STATUS_M: | |
1020 | return "STATE_CMD_STATUS_M"; | |
1021 | case STATE_CMD_SEQIN: | |
1022 | return "STATE_CMD_SEQIN"; | |
1023 | case STATE_CMD_READID: | |
1024 | return "STATE_CMD_READID"; | |
1025 | case STATE_CMD_ERASE2: | |
1026 | return "STATE_CMD_ERASE2"; | |
1027 | case STATE_CMD_RESET: | |
1028 | return "STATE_CMD_RESET"; | |
74216be4 AB |
1029 | case STATE_CMD_RNDOUT: |
1030 | return "STATE_CMD_RNDOUT"; | |
1031 | case STATE_CMD_RNDOUTSTART: | |
1032 | return "STATE_CMD_RNDOUTSTART"; | |
1da177e4 LT |
1033 | case STATE_ADDR_PAGE: |
1034 | return "STATE_ADDR_PAGE"; | |
1035 | case STATE_ADDR_SEC: | |
1036 | return "STATE_ADDR_SEC"; | |
1037 | case STATE_ADDR_ZERO: | |
1038 | return "STATE_ADDR_ZERO"; | |
74216be4 AB |
1039 | case STATE_ADDR_COLUMN: |
1040 | return "STATE_ADDR_COLUMN"; | |
1da177e4 LT |
1041 | case STATE_DATAIN: |
1042 | return "STATE_DATAIN"; | |
1043 | case STATE_DATAOUT: | |
1044 | return "STATE_DATAOUT"; | |
1045 | case STATE_DATAOUT_ID: | |
1046 | return "STATE_DATAOUT_ID"; | |
1047 | case STATE_DATAOUT_STATUS: | |
1048 | return "STATE_DATAOUT_STATUS"; | |
1049 | case STATE_DATAOUT_STATUS_M: | |
1050 | return "STATE_DATAOUT_STATUS_M"; | |
1051 | case STATE_READY: | |
1052 | return "STATE_READY"; | |
1053 | case STATE_UNKNOWN: | |
1054 | return "STATE_UNKNOWN"; | |
1055 | } | |
1056 | ||
1057 | NS_ERR("get_state_name: unknown state, BUG\n"); | |
1058 | return NULL; | |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * Check if command is valid. | |
1063 | * | |
1064 | * RETURNS: 1 if wrong command, 0 if right. | |
1065 | */ | |
a5602146 | 1066 | static int check_command(int cmd) |
1da177e4 LT |
1067 | { |
1068 | switch (cmd) { | |
61b03bd7 | 1069 | |
1da177e4 | 1070 | case NAND_CMD_READ0: |
74216be4 | 1071 | case NAND_CMD_READ1: |
1da177e4 LT |
1072 | case NAND_CMD_READSTART: |
1073 | case NAND_CMD_PAGEPROG: | |
1074 | case NAND_CMD_READOOB: | |
1075 | case NAND_CMD_ERASE1: | |
1076 | case NAND_CMD_STATUS: | |
1077 | case NAND_CMD_SEQIN: | |
1078 | case NAND_CMD_READID: | |
1079 | case NAND_CMD_ERASE2: | |
1080 | case NAND_CMD_RESET: | |
74216be4 AB |
1081 | case NAND_CMD_RNDOUT: |
1082 | case NAND_CMD_RNDOUTSTART: | |
1da177e4 | 1083 | return 0; |
61b03bd7 | 1084 | |
1da177e4 LT |
1085 | case NAND_CMD_STATUS_MULTI: |
1086 | default: | |
1087 | return 1; | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | * Returns state after command is accepted by command number. | |
1093 | */ | |
a5602146 | 1094 | static uint32_t get_state_by_command(unsigned command) |
1da177e4 LT |
1095 | { |
1096 | switch (command) { | |
1097 | case NAND_CMD_READ0: | |
1098 | return STATE_CMD_READ0; | |
1099 | case NAND_CMD_READ1: | |
1100 | return STATE_CMD_READ1; | |
1101 | case NAND_CMD_PAGEPROG: | |
1102 | return STATE_CMD_PAGEPROG; | |
1103 | case NAND_CMD_READSTART: | |
1104 | return STATE_CMD_READSTART; | |
1105 | case NAND_CMD_READOOB: | |
1106 | return STATE_CMD_READOOB; | |
1107 | case NAND_CMD_ERASE1: | |
1108 | return STATE_CMD_ERASE1; | |
1109 | case NAND_CMD_STATUS: | |
1110 | return STATE_CMD_STATUS; | |
1111 | case NAND_CMD_STATUS_MULTI: | |
1112 | return STATE_CMD_STATUS_M; | |
1113 | case NAND_CMD_SEQIN: | |
1114 | return STATE_CMD_SEQIN; | |
1115 | case NAND_CMD_READID: | |
1116 | return STATE_CMD_READID; | |
1117 | case NAND_CMD_ERASE2: | |
1118 | return STATE_CMD_ERASE2; | |
1119 | case NAND_CMD_RESET: | |
1120 | return STATE_CMD_RESET; | |
74216be4 AB |
1121 | case NAND_CMD_RNDOUT: |
1122 | return STATE_CMD_RNDOUT; | |
1123 | case NAND_CMD_RNDOUTSTART: | |
1124 | return STATE_CMD_RNDOUTSTART; | |
1da177e4 LT |
1125 | } |
1126 | ||
1127 | NS_ERR("get_state_by_command: unknown command, BUG\n"); | |
1128 | return 0; | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | * Move an address byte to the correspondent internal register. | |
1133 | */ | |
a5602146 | 1134 | static inline void accept_addr_byte(struct nandsim *ns, u_char bt) |
1da177e4 LT |
1135 | { |
1136 | uint byte = (uint)bt; | |
61b03bd7 | 1137 | |
1da177e4 LT |
1138 | if (ns->regs.count < (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) |
1139 | ns->regs.column |= (byte << 8 * ns->regs.count); | |
1140 | else { | |
1141 | ns->regs.row |= (byte << 8 * (ns->regs.count - | |
1142 | ns->geom.pgaddrbytes + | |
1143 | ns->geom.secaddrbytes)); | |
1144 | } | |
1145 | ||
1146 | return; | |
1147 | } | |
61b03bd7 | 1148 | |
1da177e4 LT |
1149 | /* |
1150 | * Switch to STATE_READY state. | |
1151 | */ | |
a5602146 | 1152 | static inline void switch_to_ready_state(struct nandsim *ns, u_char status) |
1da177e4 LT |
1153 | { |
1154 | NS_DBG("switch_to_ready_state: switch to %s state\n", get_state_name(STATE_READY)); | |
1155 | ||
1156 | ns->state = STATE_READY; | |
1157 | ns->nxstate = STATE_UNKNOWN; | |
1158 | ns->op = NULL; | |
1159 | ns->npstates = 0; | |
1160 | ns->stateidx = 0; | |
1161 | ns->regs.num = 0; | |
1162 | ns->regs.count = 0; | |
1163 | ns->regs.off = 0; | |
1164 | ns->regs.row = 0; | |
1165 | ns->regs.column = 0; | |
1166 | ns->regs.status = status; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * If the operation isn't known yet, try to find it in the global array | |
1171 | * of supported operations. | |
1172 | * | |
1173 | * Operation can be unknown because of the following. | |
1174 | * 1. New command was accepted and this is the firs call to find the | |
1175 | * correspondent states chain. In this case ns->npstates = 0; | |
1176 | * 2. There is several operations which begin with the same command(s) | |
1177 | * (for example program from the second half and read from the | |
1178 | * second half operations both begin with the READ1 command). In this | |
1179 | * case the ns->pstates[] array contains previous states. | |
61b03bd7 | 1180 | * |
1da177e4 LT |
1181 | * Thus, the function tries to find operation containing the following |
1182 | * states (if the 'flag' parameter is 0): | |
1183 | * ns->pstates[0], ... ns->pstates[ns->npstates], ns->state | |
1184 | * | |
1185 | * If (one and only one) matching operation is found, it is accepted ( | |
1186 | * ns->ops, ns->state, ns->nxstate are initialized, ns->npstate is | |
1187 | * zeroed). | |
61b03bd7 | 1188 | * |
1da177e4 LT |
1189 | * If there are several maches, the current state is pushed to the |
1190 | * ns->pstates. | |
1191 | * | |
1192 | * The operation can be unknown only while commands are input to the chip. | |
1193 | * As soon as address command is accepted, the operation must be known. | |
1194 | * In such situation the function is called with 'flag' != 0, and the | |
1195 | * operation is searched using the following pattern: | |
1196 | * ns->pstates[0], ... ns->pstates[ns->npstates], <address input> | |
61b03bd7 | 1197 | * |
1da177e4 LT |
1198 | * It is supposed that this pattern must either match one operation on |
1199 | * none. There can't be ambiguity in that case. | |
1200 | * | |
1201 | * If no matches found, the functions does the following: | |
1202 | * 1. if there are saved states present, try to ignore them and search | |
1203 | * again only using the last command. If nothing was found, switch | |
1204 | * to the STATE_READY state. | |
1205 | * 2. if there are no saved states, switch to the STATE_READY state. | |
1206 | * | |
1207 | * RETURNS: -2 - no matched operations found. | |
1208 | * -1 - several matches. | |
1209 | * 0 - operation is found. | |
1210 | */ | |
a5602146 | 1211 | static int find_operation(struct nandsim *ns, uint32_t flag) |
1da177e4 LT |
1212 | { |
1213 | int opsfound = 0; | |
1214 | int i, j, idx = 0; | |
61b03bd7 | 1215 | |
1da177e4 LT |
1216 | for (i = 0; i < NS_OPER_NUM; i++) { |
1217 | ||
1218 | int found = 1; | |
61b03bd7 | 1219 | |
1da177e4 LT |
1220 | if (!(ns->options & ops[i].reqopts)) |
1221 | /* Ignore operations we can't perform */ | |
1222 | continue; | |
61b03bd7 | 1223 | |
1da177e4 LT |
1224 | if (flag) { |
1225 | if (!(ops[i].states[ns->npstates] & STATE_ADDR_MASK)) | |
1226 | continue; | |
1227 | } else { | |
1228 | if (NS_STATE(ns->state) != NS_STATE(ops[i].states[ns->npstates])) | |
1229 | continue; | |
1230 | } | |
1231 | ||
61b03bd7 | 1232 | for (j = 0; j < ns->npstates; j++) |
1da177e4 LT |
1233 | if (NS_STATE(ops[i].states[j]) != NS_STATE(ns->pstates[j]) |
1234 | && (ns->options & ops[idx].reqopts)) { | |
1235 | found = 0; | |
1236 | break; | |
1237 | } | |
1238 | ||
1239 | if (found) { | |
1240 | idx = i; | |
1241 | opsfound += 1; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (opsfound == 1) { | |
1246 | /* Exact match */ | |
1247 | ns->op = &ops[idx].states[0]; | |
1248 | if (flag) { | |
61b03bd7 | 1249 | /* |
1da177e4 LT |
1250 | * In this case the find_operation function was |
1251 | * called when address has just began input. But it isn't | |
1252 | * yet fully input and the current state must | |
1253 | * not be one of STATE_ADDR_*, but the STATE_ADDR_* | |
1254 | * state must be the next state (ns->nxstate). | |
1255 | */ | |
1256 | ns->stateidx = ns->npstates - 1; | |
1257 | } else { | |
1258 | ns->stateidx = ns->npstates; | |
1259 | } | |
1260 | ns->npstates = 0; | |
1261 | ns->state = ns->op[ns->stateidx]; | |
1262 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1263 | NS_DBG("find_operation: operation found, index: %d, state: %s, nxstate %s\n", | |
1264 | idx, get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1265 | return 0; | |
1266 | } | |
61b03bd7 | 1267 | |
1da177e4 LT |
1268 | if (opsfound == 0) { |
1269 | /* Nothing was found. Try to ignore previous commands (if any) and search again */ | |
1270 | if (ns->npstates != 0) { | |
1271 | NS_DBG("find_operation: no operation found, try again with state %s\n", | |
1272 | get_state_name(ns->state)); | |
1273 | ns->npstates = 0; | |
1274 | return find_operation(ns, 0); | |
1275 | ||
1276 | } | |
1277 | NS_DBG("find_operation: no operations found\n"); | |
1278 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1279 | return -2; | |
1280 | } | |
61b03bd7 | 1281 | |
1da177e4 LT |
1282 | if (flag) { |
1283 | /* This shouldn't happen */ | |
1284 | NS_DBG("find_operation: BUG, operation must be known if address is input\n"); | |
1285 | return -2; | |
1286 | } | |
61b03bd7 | 1287 | |
1da177e4 LT |
1288 | NS_DBG("find_operation: there is still ambiguity\n"); |
1289 | ||
1290 | ns->pstates[ns->npstates++] = ns->state; | |
1291 | ||
1292 | return -1; | |
1293 | } | |
1294 | ||
a9fc8991 AH |
1295 | static void put_pages(struct nandsim *ns) |
1296 | { | |
1297 | int i; | |
1298 | ||
1299 | for (i = 0; i < ns->held_cnt; i++) | |
1300 | page_cache_release(ns->held_pages[i]); | |
1301 | } | |
1302 | ||
1303 | /* Get page cache pages in advance to provide NOFS memory allocation */ | |
1304 | static int get_pages(struct nandsim *ns, struct file *file, size_t count, loff_t pos) | |
1305 | { | |
1306 | pgoff_t index, start_index, end_index; | |
1307 | struct page *page; | |
1308 | struct address_space *mapping = file->f_mapping; | |
1309 | ||
1310 | start_index = pos >> PAGE_CACHE_SHIFT; | |
1311 | end_index = (pos + count - 1) >> PAGE_CACHE_SHIFT; | |
1312 | if (end_index - start_index + 1 > NS_MAX_HELD_PAGES) | |
1313 | return -EINVAL; | |
1314 | ns->held_cnt = 0; | |
1315 | for (index = start_index; index <= end_index; index++) { | |
1316 | page = find_get_page(mapping, index); | |
1317 | if (page == NULL) { | |
1318 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1319 | if (page == NULL) { | |
1320 | write_inode_now(mapping->host, 1); | |
1321 | page = find_or_create_page(mapping, index, GFP_NOFS); | |
1322 | } | |
1323 | if (page == NULL) { | |
1324 | put_pages(ns); | |
1325 | return -ENOMEM; | |
1326 | } | |
1327 | unlock_page(page); | |
1328 | } | |
1329 | ns->held_pages[ns->held_cnt++] = page; | |
1330 | } | |
1331 | return 0; | |
1332 | } | |
1333 | ||
1334 | static int set_memalloc(void) | |
1335 | { | |
1336 | if (current->flags & PF_MEMALLOC) | |
1337 | return 0; | |
1338 | current->flags |= PF_MEMALLOC; | |
1339 | return 1; | |
1340 | } | |
1341 | ||
1342 | static void clear_memalloc(int memalloc) | |
1343 | { | |
1344 | if (memalloc) | |
1345 | current->flags &= ~PF_MEMALLOC; | |
1346 | } | |
1347 | ||
1348 | static ssize_t read_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t *pos) | |
1349 | { | |
1350 | mm_segment_t old_fs; | |
1351 | ssize_t tx; | |
1352 | int err, memalloc; | |
1353 | ||
1354 | err = get_pages(ns, file, count, *pos); | |
1355 | if (err) | |
1356 | return err; | |
1357 | old_fs = get_fs(); | |
1358 | set_fs(get_ds()); | |
1359 | memalloc = set_memalloc(); | |
1360 | tx = vfs_read(file, (char __user *)buf, count, pos); | |
1361 | clear_memalloc(memalloc); | |
1362 | set_fs(old_fs); | |
1363 | put_pages(ns); | |
1364 | return tx; | |
1365 | } | |
1366 | ||
1367 | static ssize_t write_file(struct nandsim *ns, struct file *file, void *buf, size_t count, loff_t *pos) | |
1368 | { | |
1369 | mm_segment_t old_fs; | |
1370 | ssize_t tx; | |
1371 | int err, memalloc; | |
1372 | ||
1373 | err = get_pages(ns, file, count, *pos); | |
1374 | if (err) | |
1375 | return err; | |
1376 | old_fs = get_fs(); | |
1377 | set_fs(get_ds()); | |
1378 | memalloc = set_memalloc(); | |
1379 | tx = vfs_write(file, (char __user *)buf, count, pos); | |
1380 | clear_memalloc(memalloc); | |
1381 | set_fs(old_fs); | |
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 | ||
a9fc8991 AH |
1402 | int do_read_error(struct nandsim *ns, int num) |
1403 | { | |
1404 | unsigned int page_no = ns->regs.row; | |
1405 | ||
1406 | if (read_error(page_no)) { | |
1407 | int i; | |
1408 | memset(ns->buf.byte, 0xFF, num); | |
1409 | for (i = 0; i < num; ++i) | |
1410 | ns->buf.byte[i] = random32(); | |
1411 | NS_WARN("simulating read error in page %u\n", page_no); | |
1412 | return 1; | |
1413 | } | |
1414 | return 0; | |
1415 | } | |
1416 | ||
1417 | void do_bit_flips(struct nandsim *ns, int num) | |
1418 | { | |
1419 | if (bitflips && random32() < (1 << 22)) { | |
1420 | int flips = 1; | |
1421 | if (bitflips > 1) | |
1422 | flips = (random32() % (int) bitflips) + 1; | |
1423 | while (flips--) { | |
1424 | int pos = random32() % (num * 8); | |
1425 | ns->buf.byte[pos / 8] ^= (1 << (pos % 8)); | |
1426 | NS_WARN("read_page: flipping bit %d in page %d " | |
1427 | "reading from %d ecc: corrected=%u failed=%u\n", | |
1428 | pos, ns->regs.row, ns->regs.column + ns->regs.off, | |
1429 | nsmtd->ecc_stats.corrected, nsmtd->ecc_stats.failed); | |
1430 | } | |
1431 | } | |
1432 | } | |
1433 | ||
d086d436 VK |
1434 | /* |
1435 | * Fill the NAND buffer with data read from the specified page. | |
1436 | */ | |
1437 | static void read_page(struct nandsim *ns, int num) | |
1438 | { | |
1439 | union ns_mem *mypage; | |
1440 | ||
a9fc8991 AH |
1441 | if (ns->cfile) { |
1442 | if (!ns->pages_written[ns->regs.row]) { | |
1443 | NS_DBG("read_page: page %d not written\n", ns->regs.row); | |
1444 | memset(ns->buf.byte, 0xFF, num); | |
1445 | } else { | |
1446 | loff_t pos; | |
1447 | ssize_t tx; | |
1448 | ||
1449 | NS_DBG("read_page: page %d written, reading from %d\n", | |
1450 | ns->regs.row, ns->regs.column + ns->regs.off); | |
1451 | if (do_read_error(ns, num)) | |
1452 | return; | |
1453 | pos = (loff_t)ns->regs.row * ns->geom.pgszoob + ns->regs.column + ns->regs.off; | |
1454 | tx = read_file(ns, ns->cfile, ns->buf.byte, num, &pos); | |
1455 | if (tx != num) { | |
1456 | NS_ERR("read_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1457 | return; | |
1458 | } | |
1459 | do_bit_flips(ns, num); | |
1460 | } | |
1461 | return; | |
1462 | } | |
1463 | ||
d086d436 VK |
1464 | mypage = NS_GET_PAGE(ns); |
1465 | if (mypage->byte == NULL) { | |
1466 | NS_DBG("read_page: page %d not allocated\n", ns->regs.row); | |
1467 | memset(ns->buf.byte, 0xFF, num); | |
1468 | } else { | |
1469 | NS_DBG("read_page: page %d allocated, reading from %d\n", | |
1470 | ns->regs.row, ns->regs.column + ns->regs.off); | |
a9fc8991 | 1471 | if (do_read_error(ns, num)) |
514087e7 | 1472 | return; |
d086d436 | 1473 | memcpy(ns->buf.byte, NS_PAGE_BYTE_OFF(ns), num); |
a9fc8991 | 1474 | do_bit_flips(ns, num); |
d086d436 VK |
1475 | } |
1476 | } | |
1477 | ||
1478 | /* | |
1479 | * Erase all pages in the specified sector. | |
1480 | */ | |
1481 | static void erase_sector(struct nandsim *ns) | |
1482 | { | |
1483 | union ns_mem *mypage; | |
1484 | int i; | |
1485 | ||
a9fc8991 AH |
1486 | if (ns->cfile) { |
1487 | for (i = 0; i < ns->geom.pgsec; i++) | |
1488 | if (ns->pages_written[ns->regs.row + i]) { | |
1489 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row + i); | |
1490 | ns->pages_written[ns->regs.row + i] = 0; | |
1491 | } | |
1492 | return; | |
1493 | } | |
1494 | ||
d086d436 VK |
1495 | mypage = NS_GET_PAGE(ns); |
1496 | for (i = 0; i < ns->geom.pgsec; i++) { | |
1497 | if (mypage->byte != NULL) { | |
1498 | NS_DBG("erase_sector: freeing page %d\n", ns->regs.row+i); | |
8a4c2495 | 1499 | kmem_cache_free(ns->nand_pages_slab, mypage->byte); |
d086d436 VK |
1500 | mypage->byte = NULL; |
1501 | } | |
1502 | mypage++; | |
1503 | } | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * Program the specified page with the contents from the NAND buffer. | |
1508 | */ | |
1509 | static int prog_page(struct nandsim *ns, int num) | |
1510 | { | |
82810b7b | 1511 | int i; |
d086d436 VK |
1512 | union ns_mem *mypage; |
1513 | u_char *pg_off; | |
1514 | ||
a9fc8991 AH |
1515 | if (ns->cfile) { |
1516 | loff_t off, pos; | |
1517 | ssize_t tx; | |
1518 | int all; | |
1519 | ||
1520 | NS_DBG("prog_page: writing page %d\n", ns->regs.row); | |
1521 | pg_off = ns->file_buf + ns->regs.column + ns->regs.off; | |
1522 | off = (loff_t)ns->regs.row * ns->geom.pgszoob + ns->regs.column + ns->regs.off; | |
1523 | if (!ns->pages_written[ns->regs.row]) { | |
1524 | all = 1; | |
1525 | memset(ns->file_buf, 0xff, ns->geom.pgszoob); | |
1526 | } else { | |
1527 | all = 0; | |
1528 | pos = off; | |
1529 | tx = read_file(ns, ns->cfile, pg_off, num, &pos); | |
1530 | if (tx != num) { | |
1531 | NS_ERR("prog_page: read error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1532 | return -1; | |
1533 | } | |
1534 | } | |
1535 | for (i = 0; i < num; i++) | |
1536 | pg_off[i] &= ns->buf.byte[i]; | |
1537 | if (all) { | |
1538 | pos = (loff_t)ns->regs.row * ns->geom.pgszoob; | |
1539 | tx = write_file(ns, ns->cfile, ns->file_buf, ns->geom.pgszoob, &pos); | |
1540 | if (tx != ns->geom.pgszoob) { | |
1541 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1542 | return -1; | |
1543 | } | |
1544 | ns->pages_written[ns->regs.row] = 1; | |
1545 | } else { | |
1546 | pos = off; | |
1547 | tx = write_file(ns, ns->cfile, pg_off, num, &pos); | |
1548 | if (tx != num) { | |
1549 | NS_ERR("prog_page: write error for page %d ret %ld\n", ns->regs.row, (long)tx); | |
1550 | return -1; | |
1551 | } | |
1552 | } | |
1553 | return 0; | |
1554 | } | |
1555 | ||
d086d436 VK |
1556 | mypage = NS_GET_PAGE(ns); |
1557 | if (mypage->byte == NULL) { | |
1558 | NS_DBG("prog_page: allocating page %d\n", ns->regs.row); | |
98b830d2 AB |
1559 | /* |
1560 | * We allocate memory with GFP_NOFS because a flash FS may | |
1561 | * utilize this. If it is holding an FS lock, then gets here, | |
8a4c2495 AK |
1562 | * then kernel memory alloc runs writeback which goes to the FS |
1563 | * again and deadlocks. This was seen in practice. | |
98b830d2 | 1564 | */ |
8a4c2495 | 1565 | mypage->byte = kmem_cache_alloc(ns->nand_pages_slab, GFP_NOFS); |
d086d436 VK |
1566 | if (mypage->byte == NULL) { |
1567 | NS_ERR("prog_page: error allocating memory for page %d\n", ns->regs.row); | |
1568 | return -1; | |
1569 | } | |
1570 | memset(mypage->byte, 0xFF, ns->geom.pgszoob); | |
1571 | } | |
1572 | ||
1573 | pg_off = NS_PAGE_BYTE_OFF(ns); | |
82810b7b AB |
1574 | for (i = 0; i < num; i++) |
1575 | pg_off[i] &= ns->buf.byte[i]; | |
d086d436 VK |
1576 | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1da177e4 LT |
1580 | /* |
1581 | * If state has any action bit, perform this action. | |
1582 | * | |
1583 | * RETURNS: 0 if success, -1 if error. | |
1584 | */ | |
a5602146 | 1585 | static int do_state_action(struct nandsim *ns, uint32_t action) |
1da177e4 | 1586 | { |
d086d436 | 1587 | int num; |
1da177e4 | 1588 | int busdiv = ns->busw == 8 ? 1 : 2; |
514087e7 | 1589 | unsigned int erase_block_no, page_no; |
1da177e4 LT |
1590 | |
1591 | action &= ACTION_MASK; | |
61b03bd7 | 1592 | |
1da177e4 LT |
1593 | /* Check that page address input is correct */ |
1594 | if (action != ACTION_SECERASE && ns->regs.row >= ns->geom.pgnum) { | |
1595 | NS_WARN("do_state_action: wrong page number (%#x)\n", ns->regs.row); | |
1596 | return -1; | |
1597 | } | |
1598 | ||
1599 | switch (action) { | |
1600 | ||
1601 | case ACTION_CPY: | |
1602 | /* | |
1603 | * Copy page data to the internal buffer. | |
1604 | */ | |
1605 | ||
1606 | /* Column shouldn't be very large */ | |
1607 | if (ns->regs.column >= (ns->geom.pgszoob - ns->regs.off)) { | |
1608 | NS_ERR("do_state_action: column number is too large\n"); | |
1609 | break; | |
1610 | } | |
1611 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
d086d436 | 1612 | read_page(ns, num); |
1da177e4 LT |
1613 | |
1614 | NS_DBG("do_state_action: (ACTION_CPY:) copy %d bytes to int buf, raw offset %d\n", | |
1615 | num, NS_RAW_OFFSET(ns) + ns->regs.off); | |
61b03bd7 | 1616 | |
1da177e4 LT |
1617 | if (ns->regs.off == 0) |
1618 | NS_LOG("read page %d\n", ns->regs.row); | |
1619 | else if (ns->regs.off < ns->geom.pgsz) | |
1620 | NS_LOG("read page %d (second half)\n", ns->regs.row); | |
1621 | else | |
1622 | NS_LOG("read OOB of page %d\n", ns->regs.row); | |
61b03bd7 | 1623 | |
1da177e4 LT |
1624 | NS_UDELAY(access_delay); |
1625 | NS_UDELAY(input_cycle * ns->geom.pgsz / 1000 / busdiv); | |
1626 | ||
1627 | break; | |
1628 | ||
1629 | case ACTION_SECERASE: | |
1630 | /* | |
1631 | * Erase sector. | |
1632 | */ | |
61b03bd7 | 1633 | |
1da177e4 LT |
1634 | if (ns->lines.wp) { |
1635 | NS_ERR("do_state_action: device is write-protected, ignore sector erase\n"); | |
1636 | return -1; | |
1637 | } | |
61b03bd7 | 1638 | |
1da177e4 LT |
1639 | if (ns->regs.row >= ns->geom.pgnum - ns->geom.pgsec |
1640 | || (ns->regs.row & ~(ns->geom.secsz - 1))) { | |
1641 | NS_ERR("do_state_action: wrong sector address (%#x)\n", ns->regs.row); | |
1642 | return -1; | |
1643 | } | |
61b03bd7 | 1644 | |
1da177e4 LT |
1645 | ns->regs.row = (ns->regs.row << |
1646 | 8 * (ns->geom.pgaddrbytes - ns->geom.secaddrbytes)) | ns->regs.column; | |
1647 | ns->regs.column = 0; | |
61b03bd7 | 1648 | |
514087e7 AH |
1649 | erase_block_no = ns->regs.row >> (ns->geom.secshift - ns->geom.pgshift); |
1650 | ||
1da177e4 LT |
1651 | NS_DBG("do_state_action: erase sector at address %#x, off = %d\n", |
1652 | ns->regs.row, NS_RAW_OFFSET(ns)); | |
514087e7 | 1653 | NS_LOG("erase sector %u\n", erase_block_no); |
1da177e4 | 1654 | |
d086d436 | 1655 | erase_sector(ns); |
61b03bd7 | 1656 | |
1da177e4 | 1657 | NS_MDELAY(erase_delay); |
61b03bd7 | 1658 | |
57aa6b54 AH |
1659 | if (erase_block_wear) |
1660 | update_wear(erase_block_no); | |
1661 | ||
514087e7 AH |
1662 | if (erase_error(erase_block_no)) { |
1663 | NS_WARN("simulating erase failure in erase block %u\n", erase_block_no); | |
1664 | return -1; | |
1665 | } | |
1666 | ||
1da177e4 LT |
1667 | break; |
1668 | ||
1669 | case ACTION_PRGPAGE: | |
1670 | /* | |
1671 | * Programm page - move internal buffer data to the page. | |
1672 | */ | |
1673 | ||
1674 | if (ns->lines.wp) { | |
1675 | NS_WARN("do_state_action: device is write-protected, programm\n"); | |
1676 | return -1; | |
1677 | } | |
1678 | ||
1679 | num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1680 | if (num != ns->regs.count) { | |
1681 | NS_ERR("do_state_action: too few bytes were input (%d instead of %d)\n", | |
1682 | ns->regs.count, num); | |
1683 | return -1; | |
1684 | } | |
1685 | ||
d086d436 VK |
1686 | if (prog_page(ns, num) == -1) |
1687 | return -1; | |
1da177e4 | 1688 | |
514087e7 AH |
1689 | page_no = ns->regs.row; |
1690 | ||
1da177e4 LT |
1691 | NS_DBG("do_state_action: copy %d bytes from int buf to (%#x, %#x), raw off = %d\n", |
1692 | num, ns->regs.row, ns->regs.column, NS_RAW_OFFSET(ns) + ns->regs.off); | |
1693 | NS_LOG("programm page %d\n", ns->regs.row); | |
61b03bd7 | 1694 | |
1da177e4 LT |
1695 | NS_UDELAY(programm_delay); |
1696 | NS_UDELAY(output_cycle * ns->geom.pgsz / 1000 / busdiv); | |
61b03bd7 | 1697 | |
514087e7 AH |
1698 | if (write_error(page_no)) { |
1699 | NS_WARN("simulating write failure in page %u\n", page_no); | |
1700 | return -1; | |
1701 | } | |
1702 | ||
1da177e4 | 1703 | break; |
61b03bd7 | 1704 | |
1da177e4 LT |
1705 | case ACTION_ZEROOFF: |
1706 | NS_DBG("do_state_action: set internal offset to 0\n"); | |
1707 | ns->regs.off = 0; | |
1708 | break; | |
1709 | ||
1710 | case ACTION_HALFOFF: | |
1711 | if (!(ns->options & OPT_PAGE512_8BIT)) { | |
1712 | NS_ERR("do_state_action: BUG! can't skip half of page for non-512" | |
1713 | "byte page size 8x chips\n"); | |
1714 | return -1; | |
1715 | } | |
1716 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz/2); | |
1717 | ns->regs.off = ns->geom.pgsz/2; | |
1718 | break; | |
1719 | ||
1720 | case ACTION_OOBOFF: | |
1721 | NS_DBG("do_state_action: set internal offset to %d\n", ns->geom.pgsz); | |
1722 | ns->regs.off = ns->geom.pgsz; | |
1723 | break; | |
61b03bd7 | 1724 | |
1da177e4 LT |
1725 | default: |
1726 | NS_DBG("do_state_action: BUG! unknown action\n"); | |
1727 | } | |
1728 | ||
1729 | return 0; | |
1730 | } | |
1731 | ||
1732 | /* | |
1733 | * Switch simulator's state. | |
1734 | */ | |
a5602146 | 1735 | static void switch_state(struct nandsim *ns) |
1da177e4 LT |
1736 | { |
1737 | if (ns->op) { | |
1738 | /* | |
1739 | * The current operation have already been identified. | |
1740 | * Just follow the states chain. | |
1741 | */ | |
61b03bd7 | 1742 | |
1da177e4 LT |
1743 | ns->stateidx += 1; |
1744 | ns->state = ns->nxstate; | |
1745 | ns->nxstate = ns->op[ns->stateidx + 1]; | |
1746 | ||
1747 | NS_DBG("switch_state: operation is known, switch to the next state, " | |
1748 | "state: %s, nxstate: %s\n", | |
1749 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1750 | ||
1751 | /* See, whether we need to do some action */ | |
1752 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1753 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1754 | return; | |
1755 | } | |
61b03bd7 | 1756 | |
1da177e4 LT |
1757 | } else { |
1758 | /* | |
1759 | * We don't yet know which operation we perform. | |
1760 | * Try to identify it. | |
1761 | */ | |
1762 | ||
61b03bd7 | 1763 | /* |
1da177e4 LT |
1764 | * The only event causing the switch_state function to |
1765 | * be called with yet unknown operation is new command. | |
1766 | */ | |
1767 | ns->state = get_state_by_command(ns->regs.command); | |
1768 | ||
1769 | NS_DBG("switch_state: operation is unknown, try to find it\n"); | |
1770 | ||
1771 | if (find_operation(ns, 0) != 0) | |
1772 | return; | |
1773 | ||
1774 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { | |
1775 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
1776 | return; | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | /* For 16x devices column means the page offset in words */ | |
1781 | if ((ns->nxstate & STATE_ADDR_MASK) && ns->busw == 16) { | |
1782 | NS_DBG("switch_state: double the column number for 16x device\n"); | |
1783 | ns->regs.column <<= 1; | |
1784 | } | |
1785 | ||
1786 | if (NS_STATE(ns->nxstate) == STATE_READY) { | |
1787 | /* | |
1788 | * The current state is the last. Return to STATE_READY | |
1789 | */ | |
1790 | ||
1791 | u_char status = NS_STATUS_OK(ns); | |
61b03bd7 | 1792 | |
1da177e4 LT |
1793 | /* In case of data states, see if all bytes were input/output */ |
1794 | if ((ns->state & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) | |
1795 | && ns->regs.count != ns->regs.num) { | |
1796 | NS_WARN("switch_state: not all bytes were processed, %d left\n", | |
1797 | ns->regs.num - ns->regs.count); | |
1798 | status = NS_STATUS_FAILED(ns); | |
1799 | } | |
61b03bd7 | 1800 | |
1da177e4 LT |
1801 | NS_DBG("switch_state: operation complete, switch to STATE_READY state\n"); |
1802 | ||
1803 | switch_to_ready_state(ns, status); | |
1804 | ||
1805 | return; | |
1806 | } else if (ns->nxstate & (STATE_DATAIN_MASK | STATE_DATAOUT_MASK)) { | |
61b03bd7 | 1807 | /* |
1da177e4 LT |
1808 | * If the next state is data input/output, switch to it now |
1809 | */ | |
61b03bd7 | 1810 | |
1da177e4 LT |
1811 | ns->state = ns->nxstate; |
1812 | ns->nxstate = ns->op[++ns->stateidx + 1]; | |
1813 | ns->regs.num = ns->regs.count = 0; | |
1814 | ||
1815 | NS_DBG("switch_state: the next state is data I/O, switch, " | |
1816 | "state: %s, nxstate: %s\n", | |
1817 | get_state_name(ns->state), get_state_name(ns->nxstate)); | |
1818 | ||
1819 | /* | |
1820 | * Set the internal register to the count of bytes which | |
1821 | * are expected to be input or output | |
1822 | */ | |
1823 | switch (NS_STATE(ns->state)) { | |
1824 | case STATE_DATAIN: | |
1825 | case STATE_DATAOUT: | |
1826 | ns->regs.num = ns->geom.pgszoob - ns->regs.off - ns->regs.column; | |
1827 | break; | |
61b03bd7 | 1828 | |
1da177e4 LT |
1829 | case STATE_DATAOUT_ID: |
1830 | ns->regs.num = ns->geom.idbytes; | |
1831 | break; | |
61b03bd7 | 1832 | |
1da177e4 LT |
1833 | case STATE_DATAOUT_STATUS: |
1834 | case STATE_DATAOUT_STATUS_M: | |
1835 | ns->regs.count = ns->regs.num = 0; | |
1836 | break; | |
61b03bd7 | 1837 | |
1da177e4 LT |
1838 | default: |
1839 | NS_ERR("switch_state: BUG! unknown data state\n"); | |
1840 | } | |
1841 | ||
1842 | } else if (ns->nxstate & STATE_ADDR_MASK) { | |
1843 | /* | |
1844 | * If the next state is address input, set the internal | |
1845 | * register to the number of expected address bytes | |
1846 | */ | |
1847 | ||
1848 | ns->regs.count = 0; | |
61b03bd7 | 1849 | |
1da177e4 LT |
1850 | switch (NS_STATE(ns->nxstate)) { |
1851 | case STATE_ADDR_PAGE: | |
1852 | ns->regs.num = ns->geom.pgaddrbytes; | |
61b03bd7 | 1853 | |
1da177e4 LT |
1854 | break; |
1855 | case STATE_ADDR_SEC: | |
1856 | ns->regs.num = ns->geom.secaddrbytes; | |
1857 | break; | |
61b03bd7 | 1858 | |
1da177e4 LT |
1859 | case STATE_ADDR_ZERO: |
1860 | ns->regs.num = 1; | |
1861 | break; | |
1862 | ||
74216be4 AB |
1863 | case STATE_ADDR_COLUMN: |
1864 | /* Column address is always 2 bytes */ | |
1865 | ns->regs.num = ns->geom.pgaddrbytes - ns->geom.secaddrbytes; | |
1866 | break; | |
1867 | ||
1da177e4 LT |
1868 | default: |
1869 | NS_ERR("switch_state: BUG! unknown address state\n"); | |
1870 | } | |
1871 | } else { | |
61b03bd7 | 1872 | /* |
1da177e4 LT |
1873 | * Just reset internal counters. |
1874 | */ | |
1875 | ||
1876 | ns->regs.num = 0; | |
1877 | ns->regs.count = 0; | |
1878 | } | |
1879 | } | |
1880 | ||
a5602146 | 1881 | static u_char ns_nand_read_byte(struct mtd_info *mtd) |
1da177e4 | 1882 | { |
7b8516b7 | 1883 | struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; |
1da177e4 LT |
1884 | u_char outb = 0x00; |
1885 | ||
1886 | /* Sanity and correctness checks */ | |
1887 | if (!ns->lines.ce) { | |
1888 | NS_ERR("read_byte: chip is disabled, return %#x\n", (uint)outb); | |
1889 | return outb; | |
1890 | } | |
1891 | if (ns->lines.ale || ns->lines.cle) { | |
1892 | NS_ERR("read_byte: ALE or CLE pin is high, return %#x\n", (uint)outb); | |
1893 | return outb; | |
1894 | } | |
1895 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
1896 | NS_WARN("read_byte: unexpected data output cycle, state is %s " | |
1897 | "return %#x\n", get_state_name(ns->state), (uint)outb); | |
1898 | return outb; | |
1899 | } | |
1900 | ||
1901 | /* Status register may be read as many times as it is wanted */ | |
1902 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS) { | |
1903 | NS_DBG("read_byte: return %#x status\n", ns->regs.status); | |
1904 | return ns->regs.status; | |
1905 | } | |
1906 | ||
1907 | /* Check if there is any data in the internal buffer which may be read */ | |
1908 | if (ns->regs.count == ns->regs.num) { | |
1909 | NS_WARN("read_byte: no more data to output, return %#x\n", (uint)outb); | |
1910 | return outb; | |
1911 | } | |
1912 | ||
1913 | switch (NS_STATE(ns->state)) { | |
1914 | case STATE_DATAOUT: | |
1915 | if (ns->busw == 8) { | |
1916 | outb = ns->buf.byte[ns->regs.count]; | |
1917 | ns->regs.count += 1; | |
1918 | } else { | |
1919 | outb = (u_char)cpu_to_le16(ns->buf.word[ns->regs.count >> 1]); | |
1920 | ns->regs.count += 2; | |
1921 | } | |
1922 | break; | |
1923 | case STATE_DATAOUT_ID: | |
1924 | NS_DBG("read_byte: read ID byte %d, total = %d\n", ns->regs.count, ns->regs.num); | |
1925 | outb = ns->ids[ns->regs.count]; | |
1926 | ns->regs.count += 1; | |
1927 | break; | |
1928 | default: | |
1929 | BUG(); | |
1930 | } | |
61b03bd7 | 1931 | |
1da177e4 LT |
1932 | if (ns->regs.count == ns->regs.num) { |
1933 | NS_DBG("read_byte: all bytes were read\n"); | |
1934 | ||
1935 | /* | |
1936 | * The OPT_AUTOINCR allows to read next conseqitive pages without | |
1937 | * new read operation cycle. | |
1938 | */ | |
1939 | if ((ns->options & OPT_AUTOINCR) && NS_STATE(ns->state) == STATE_DATAOUT) { | |
1940 | ns->regs.count = 0; | |
1941 | if (ns->regs.row + 1 < ns->geom.pgnum) | |
1942 | ns->regs.row += 1; | |
1943 | NS_DBG("read_byte: switch to the next page (%#x)\n", ns->regs.row); | |
1944 | do_state_action(ns, ACTION_CPY); | |
1945 | } | |
1946 | else if (NS_STATE(ns->nxstate) == STATE_READY) | |
1947 | switch_state(ns); | |
61b03bd7 | 1948 | |
1da177e4 | 1949 | } |
61b03bd7 | 1950 | |
1da177e4 LT |
1951 | return outb; |
1952 | } | |
1953 | ||
a5602146 | 1954 | static void ns_nand_write_byte(struct mtd_info *mtd, u_char byte) |
1da177e4 | 1955 | { |
7b8516b7 | 1956 | struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; |
61b03bd7 | 1957 | |
1da177e4 LT |
1958 | /* Sanity and correctness checks */ |
1959 | if (!ns->lines.ce) { | |
1960 | NS_ERR("write_byte: chip is disabled, ignore write\n"); | |
1961 | return; | |
1962 | } | |
1963 | if (ns->lines.ale && ns->lines.cle) { | |
1964 | NS_ERR("write_byte: ALE and CLE pins are high simultaneously, ignore write\n"); | |
1965 | return; | |
1966 | } | |
61b03bd7 | 1967 | |
1da177e4 LT |
1968 | if (ns->lines.cle == 1) { |
1969 | /* | |
1970 | * The byte written is a command. | |
1971 | */ | |
1972 | ||
1973 | if (byte == NAND_CMD_RESET) { | |
1974 | NS_LOG("reset chip\n"); | |
1975 | switch_to_ready_state(ns, NS_STATUS_OK(ns)); | |
1976 | return; | |
1977 | } | |
1978 | ||
74216be4 AB |
1979 | /* Check that the command byte is correct */ |
1980 | if (check_command(byte)) { | |
1981 | NS_ERR("write_byte: unknown command %#x\n", (uint)byte); | |
1982 | return; | |
1983 | } | |
1984 | ||
1da177e4 LT |
1985 | if (NS_STATE(ns->state) == STATE_DATAOUT_STATUS |
1986 | || NS_STATE(ns->state) == STATE_DATAOUT_STATUS_M | |
74216be4 AB |
1987 | || NS_STATE(ns->state) == STATE_DATAOUT) { |
1988 | int row = ns->regs.row; | |
1989 | ||
1da177e4 | 1990 | switch_state(ns); |
74216be4 AB |
1991 | if (byte == NAND_CMD_RNDOUT) |
1992 | ns->regs.row = row; | |
1993 | } | |
1da177e4 LT |
1994 | |
1995 | /* Check if chip is expecting command */ | |
1996 | if (NS_STATE(ns->nxstate) != STATE_UNKNOWN && !(ns->nxstate & STATE_CMD_MASK)) { | |
9359ea46 AH |
1997 | /* Do not warn if only 2 id bytes are read */ |
1998 | if (!(ns->regs.command == NAND_CMD_READID && | |
1999 | NS_STATE(ns->state) == STATE_DATAOUT_ID && ns->regs.count == 2)) { | |
2000 | /* | |
2001 | * We are in situation when something else (not command) | |
2002 | * was expected but command was input. In this case ignore | |
2003 | * previous command(s)/state(s) and accept the last one. | |
2004 | */ | |
2005 | NS_WARN("write_byte: command (%#x) wasn't expected, expected state is %s, " | |
2006 | "ignore previous states\n", (uint)byte, get_state_name(ns->nxstate)); | |
2007 | } | |
1da177e4 LT |
2008 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); |
2009 | } | |
61b03bd7 | 2010 | |
1da177e4 LT |
2011 | NS_DBG("command byte corresponding to %s state accepted\n", |
2012 | get_state_name(get_state_by_command(byte))); | |
2013 | ns->regs.command = byte; | |
2014 | switch_state(ns); | |
2015 | ||
2016 | } else if (ns->lines.ale == 1) { | |
2017 | /* | |
2018 | * The byte written is an address. | |
2019 | */ | |
2020 | ||
2021 | if (NS_STATE(ns->nxstate) == STATE_UNKNOWN) { | |
2022 | ||
2023 | NS_DBG("write_byte: operation isn't known yet, identify it\n"); | |
2024 | ||
2025 | if (find_operation(ns, 1) < 0) | |
2026 | return; | |
61b03bd7 | 2027 | |
1da177e4 LT |
2028 | if ((ns->state & ACTION_MASK) && do_state_action(ns, ns->state) < 0) { |
2029 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2030 | return; | |
2031 | } | |
61b03bd7 | 2032 | |
1da177e4 LT |
2033 | ns->regs.count = 0; |
2034 | switch (NS_STATE(ns->nxstate)) { | |
2035 | case STATE_ADDR_PAGE: | |
2036 | ns->regs.num = ns->geom.pgaddrbytes; | |
2037 | break; | |
2038 | case STATE_ADDR_SEC: | |
2039 | ns->regs.num = ns->geom.secaddrbytes; | |
2040 | break; | |
2041 | case STATE_ADDR_ZERO: | |
2042 | ns->regs.num = 1; | |
2043 | break; | |
2044 | default: | |
2045 | BUG(); | |
2046 | } | |
2047 | } | |
2048 | ||
2049 | /* Check that chip is expecting address */ | |
2050 | if (!(ns->nxstate & STATE_ADDR_MASK)) { | |
2051 | NS_ERR("write_byte: address (%#x) isn't expected, expected state is %s, " | |
2052 | "switch to STATE_READY\n", (uint)byte, get_state_name(ns->nxstate)); | |
2053 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2054 | return; | |
2055 | } | |
61b03bd7 | 2056 | |
1da177e4 LT |
2057 | /* Check if this is expected byte */ |
2058 | if (ns->regs.count == ns->regs.num) { | |
2059 | NS_ERR("write_byte: no more address bytes expected\n"); | |
2060 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2061 | return; | |
2062 | } | |
2063 | ||
2064 | accept_addr_byte(ns, byte); | |
2065 | ||
2066 | ns->regs.count += 1; | |
2067 | ||
2068 | NS_DBG("write_byte: address byte %#x was accepted (%d bytes input, %d expected)\n", | |
2069 | (uint)byte, ns->regs.count, ns->regs.num); | |
2070 | ||
2071 | if (ns->regs.count == ns->regs.num) { | |
2072 | NS_DBG("address (%#x, %#x) is accepted\n", ns->regs.row, ns->regs.column); | |
2073 | switch_state(ns); | |
2074 | } | |
61b03bd7 | 2075 | |
1da177e4 LT |
2076 | } else { |
2077 | /* | |
2078 | * The byte written is an input data. | |
2079 | */ | |
61b03bd7 | 2080 | |
1da177e4 LT |
2081 | /* Check that chip is expecting data input */ |
2082 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2083 | NS_ERR("write_byte: data input (%#x) isn't expected, state is %s, " | |
2084 | "switch to %s\n", (uint)byte, | |
2085 | get_state_name(ns->state), get_state_name(STATE_READY)); | |
2086 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2087 | return; | |
2088 | } | |
2089 | ||
2090 | /* Check if this is expected byte */ | |
2091 | if (ns->regs.count == ns->regs.num) { | |
2092 | NS_WARN("write_byte: %u input bytes has already been accepted, ignore write\n", | |
2093 | ns->regs.num); | |
2094 | return; | |
2095 | } | |
2096 | ||
2097 | if (ns->busw == 8) { | |
2098 | ns->buf.byte[ns->regs.count] = byte; | |
2099 | ns->regs.count += 1; | |
2100 | } else { | |
2101 | ns->buf.word[ns->regs.count >> 1] = cpu_to_le16((uint16_t)byte); | |
2102 | ns->regs.count += 2; | |
2103 | } | |
2104 | } | |
2105 | ||
2106 | return; | |
2107 | } | |
2108 | ||
7abd3ef9 TG |
2109 | static void ns_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int bitmask) |
2110 | { | |
2111 | struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; | |
2112 | ||
2113 | ns->lines.cle = bitmask & NAND_CLE ? 1 : 0; | |
2114 | ns->lines.ale = bitmask & NAND_ALE ? 1 : 0; | |
2115 | ns->lines.ce = bitmask & NAND_NCE ? 1 : 0; | |
2116 | ||
2117 | if (cmd != NAND_CMD_NONE) | |
2118 | ns_nand_write_byte(mtd, cmd); | |
2119 | } | |
2120 | ||
a5602146 | 2121 | static int ns_device_ready(struct mtd_info *mtd) |
1da177e4 LT |
2122 | { |
2123 | NS_DBG("device_ready\n"); | |
2124 | return 1; | |
2125 | } | |
2126 | ||
a5602146 | 2127 | static uint16_t ns_nand_read_word(struct mtd_info *mtd) |
1da177e4 LT |
2128 | { |
2129 | struct nand_chip *chip = (struct nand_chip *)mtd->priv; | |
2130 | ||
2131 | NS_DBG("read_word\n"); | |
61b03bd7 | 2132 | |
1da177e4 LT |
2133 | return chip->read_byte(mtd) | (chip->read_byte(mtd) << 8); |
2134 | } | |
2135 | ||
a5602146 | 2136 | static void ns_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 | 2137 | { |
7b8516b7 | 2138 | struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; |
1da177e4 LT |
2139 | |
2140 | /* Check that chip is expecting data input */ | |
2141 | if (!(ns->state & STATE_DATAIN_MASK)) { | |
2142 | NS_ERR("write_buf: data input isn't expected, state is %s, " | |
2143 | "switch to STATE_READY\n", get_state_name(ns->state)); | |
2144 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2145 | return; | |
2146 | } | |
2147 | ||
2148 | /* Check if these are expected bytes */ | |
2149 | if (ns->regs.count + len > ns->regs.num) { | |
2150 | NS_ERR("write_buf: too many input bytes\n"); | |
2151 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2152 | return; | |
2153 | } | |
2154 | ||
2155 | memcpy(ns->buf.byte + ns->regs.count, buf, len); | |
2156 | ns->regs.count += len; | |
61b03bd7 | 2157 | |
1da177e4 LT |
2158 | if (ns->regs.count == ns->regs.num) { |
2159 | NS_DBG("write_buf: %d bytes were written\n", ns->regs.count); | |
2160 | } | |
2161 | } | |
2162 | ||
a5602146 | 2163 | static void ns_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) |
1da177e4 | 2164 | { |
7b8516b7 | 2165 | struct nandsim *ns = ((struct nand_chip *)mtd->priv)->priv; |
1da177e4 LT |
2166 | |
2167 | /* Sanity and correctness checks */ | |
2168 | if (!ns->lines.ce) { | |
2169 | NS_ERR("read_buf: chip is disabled\n"); | |
2170 | return; | |
2171 | } | |
2172 | if (ns->lines.ale || ns->lines.cle) { | |
2173 | NS_ERR("read_buf: ALE or CLE pin is high\n"); | |
2174 | return; | |
2175 | } | |
2176 | if (!(ns->state & STATE_DATAOUT_MASK)) { | |
2177 | NS_WARN("read_buf: unexpected data output cycle, current state is %s\n", | |
2178 | get_state_name(ns->state)); | |
2179 | return; | |
2180 | } | |
2181 | ||
2182 | if (NS_STATE(ns->state) != STATE_DATAOUT) { | |
2183 | int i; | |
2184 | ||
2185 | for (i = 0; i < len; i++) | |
2186 | buf[i] = ((struct nand_chip *)mtd->priv)->read_byte(mtd); | |
2187 | ||
2188 | return; | |
2189 | } | |
2190 | ||
2191 | /* Check if these are expected bytes */ | |
2192 | if (ns->regs.count + len > ns->regs.num) { | |
2193 | NS_ERR("read_buf: too many bytes to read\n"); | |
2194 | switch_to_ready_state(ns, NS_STATUS_FAILED(ns)); | |
2195 | return; | |
2196 | } | |
2197 | ||
2198 | memcpy(buf, ns->buf.byte + ns->regs.count, len); | |
2199 | ns->regs.count += len; | |
61b03bd7 | 2200 | |
1da177e4 LT |
2201 | if (ns->regs.count == ns->regs.num) { |
2202 | if ((ns->options & OPT_AUTOINCR) && NS_STATE(ns->state) == STATE_DATAOUT) { | |
2203 | ns->regs.count = 0; | |
2204 | if (ns->regs.row + 1 < ns->geom.pgnum) | |
2205 | ns->regs.row += 1; | |
2206 | NS_DBG("read_buf: switch to the next page (%#x)\n", ns->regs.row); | |
2207 | do_state_action(ns, ACTION_CPY); | |
2208 | } | |
2209 | else if (NS_STATE(ns->nxstate) == STATE_READY) | |
2210 | switch_state(ns); | |
2211 | } | |
61b03bd7 | 2212 | |
1da177e4 LT |
2213 | return; |
2214 | } | |
2215 | ||
a5602146 | 2216 | static int ns_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len) |
1da177e4 LT |
2217 | { |
2218 | ns_nand_read_buf(mtd, (u_char *)&ns_verify_buf[0], len); | |
2219 | ||
2220 | if (!memcmp(buf, &ns_verify_buf[0], len)) { | |
2221 | NS_DBG("verify_buf: the buffer is OK\n"); | |
2222 | return 0; | |
2223 | } else { | |
2224 | NS_DBG("verify_buf: the buffer is wrong\n"); | |
2225 | return -EFAULT; | |
2226 | } | |
2227 | } | |
2228 | ||
1da177e4 LT |
2229 | /* |
2230 | * Module initialization function | |
2231 | */ | |
2b9175c1 | 2232 | static int __init ns_init_module(void) |
1da177e4 LT |
2233 | { |
2234 | struct nand_chip *chip; | |
2235 | struct nandsim *nand; | |
2b77a0ed | 2236 | int retval = -ENOMEM, i; |
1da177e4 LT |
2237 | |
2238 | if (bus_width != 8 && bus_width != 16) { | |
2239 | NS_ERR("wrong bus width (%d), use only 8 or 16\n", bus_width); | |
2240 | return -EINVAL; | |
2241 | } | |
61b03bd7 | 2242 | |
1da177e4 | 2243 | /* Allocate and initialize mtd_info, nand_chip and nandsim structures */ |
95b93a0c | 2244 | nsmtd = kzalloc(sizeof(struct mtd_info) + sizeof(struct nand_chip) |
1da177e4 LT |
2245 | + sizeof(struct nandsim), GFP_KERNEL); |
2246 | if (!nsmtd) { | |
2247 | NS_ERR("unable to allocate core structures.\n"); | |
2248 | return -ENOMEM; | |
2249 | } | |
1da177e4 LT |
2250 | chip = (struct nand_chip *)(nsmtd + 1); |
2251 | nsmtd->priv = (void *)chip; | |
2252 | nand = (struct nandsim *)(chip + 1); | |
61b03bd7 | 2253 | chip->priv = (void *)nand; |
1da177e4 LT |
2254 | |
2255 | /* | |
2256 | * Register simulator's callbacks. | |
2257 | */ | |
7abd3ef9 | 2258 | chip->cmd_ctrl = ns_hwcontrol; |
1da177e4 LT |
2259 | chip->read_byte = ns_nand_read_byte; |
2260 | chip->dev_ready = ns_device_ready; | |
1da177e4 LT |
2261 | chip->write_buf = ns_nand_write_buf; |
2262 | chip->read_buf = ns_nand_read_buf; | |
2263 | chip->verify_buf = ns_nand_verify_buf; | |
1da177e4 | 2264 | chip->read_word = ns_nand_read_word; |
6dfc6d25 | 2265 | chip->ecc.mode = NAND_ECC_SOFT; |
a5ac8aeb AH |
2266 | /* The NAND_SKIP_BBTSCAN option is necessary for 'overridesize' */ |
2267 | /* and 'badblocks' parameters to work */ | |
51502287 | 2268 | chip->options |= NAND_SKIP_BBTSCAN; |
1da177e4 | 2269 | |
ce85b79f SAS |
2270 | switch (bbt) { |
2271 | case 2: | |
2272 | chip->options |= NAND_USE_FLASH_BBT_NO_OOB; | |
2273 | case 1: | |
2274 | chip->options |= NAND_USE_FLASH_BBT; | |
2275 | case 0: | |
2276 | break; | |
2277 | default: | |
2278 | NS_ERR("bbt has to be 0..2\n"); | |
2279 | retval = -EINVAL; | |
2280 | goto error; | |
2281 | } | |
61b03bd7 | 2282 | /* |
1da177e4 | 2283 | * Perform minimum nandsim structure initialization to handle |
61b03bd7 | 2284 | * the initial ID read command correctly |
1da177e4 LT |
2285 | */ |
2286 | if (third_id_byte != 0xFF || fourth_id_byte != 0xFF) | |
2287 | nand->geom.idbytes = 4; | |
2288 | else | |
2289 | nand->geom.idbytes = 2; | |
2290 | nand->regs.status = NS_STATUS_OK(nand); | |
2291 | nand->nxstate = STATE_UNKNOWN; | |
2292 | nand->options |= OPT_PAGE256; /* temporary value */ | |
2293 | nand->ids[0] = first_id_byte; | |
2294 | nand->ids[1] = second_id_byte; | |
2295 | nand->ids[2] = third_id_byte; | |
2296 | nand->ids[3] = fourth_id_byte; | |
2297 | if (bus_width == 16) { | |
2298 | nand->busw = 16; | |
2299 | chip->options |= NAND_BUSWIDTH_16; | |
2300 | } | |
2301 | ||
552d9205 DW |
2302 | nsmtd->owner = THIS_MODULE; |
2303 | ||
514087e7 AH |
2304 | if ((retval = parse_weakblocks()) != 0) |
2305 | goto error; | |
2306 | ||
2307 | if ((retval = parse_weakpages()) != 0) | |
2308 | goto error; | |
2309 | ||
2310 | if ((retval = parse_gravepages()) != 0) | |
2311 | goto error; | |
2312 | ||
1da177e4 LT |
2313 | if ((retval = nand_scan(nsmtd, 1)) != 0) { |
2314 | NS_ERR("can't register NAND Simulator\n"); | |
2315 | if (retval > 0) | |
2316 | retval = -ENXIO; | |
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"); | |
2324 | goto err_exit; | |
2325 | } | |
2326 | /* N.B. This relies on nand_scan not doing anything with the size before we change it */ | |
2327 | nsmtd->size = new_size; | |
2328 | chip->chipsize = new_size; | |
6eda7a55 | 2329 | chip->chip_shift = ffs(nsmtd->erasesize) + overridesize - 1; |
07293b20 | 2330 | chip->pagemask = (chip->chipsize >> chip->page_shift) - 1; |
a5ac8aeb AH |
2331 | } |
2332 | ||
57aa6b54 AH |
2333 | if ((retval = setup_wear_reporting(nsmtd)) != 0) |
2334 | goto err_exit; | |
2335 | ||
2b77a0ed AH |
2336 | if ((retval = init_nandsim(nsmtd)) != 0) |
2337 | goto err_exit; | |
61b03bd7 | 2338 | |
ce85b79f | 2339 | if ((retval = nand_default_bbt(nsmtd)) != 0) |
514087e7 AH |
2340 | goto err_exit; |
2341 | ||
ce85b79f | 2342 | if ((retval = parse_badblocks(nand, nsmtd)) != 0) |
2b77a0ed | 2343 | goto err_exit; |
51502287 | 2344 | |
2b77a0ed AH |
2345 | /* Register NAND partitions */ |
2346 | if ((retval = add_mtd_partitions(nsmtd, &nand->partitions[0], nand->nbparts)) != 0) | |
2347 | goto err_exit; | |
1da177e4 LT |
2348 | |
2349 | return 0; | |
2350 | ||
2b77a0ed AH |
2351 | err_exit: |
2352 | free_nandsim(nand); | |
2353 | nand_release(nsmtd); | |
2354 | for (i = 0;i < ARRAY_SIZE(nand->partitions); ++i) | |
2355 | kfree(nand->partitions[i].name); | |
1da177e4 LT |
2356 | error: |
2357 | kfree(nsmtd); | |
514087e7 | 2358 | free_lists(); |
1da177e4 LT |
2359 | |
2360 | return retval; | |
2361 | } | |
2362 | ||
2363 | module_init(ns_init_module); | |
2364 | ||
2365 | /* | |
2366 | * Module clean-up function | |
2367 | */ | |
2368 | static void __exit ns_cleanup_module(void) | |
2369 | { | |
7b8516b7 | 2370 | struct nandsim *ns = ((struct nand_chip *)nsmtd->priv)->priv; |
2b77a0ed | 2371 | int i; |
1da177e4 LT |
2372 | |
2373 | free_nandsim(ns); /* Free nandsim private resources */ | |
2b77a0ed AH |
2374 | nand_release(nsmtd); /* Unregister driver */ |
2375 | for (i = 0;i < ARRAY_SIZE(ns->partitions); ++i) | |
2376 | kfree(ns->partitions[i].name); | |
1da177e4 | 2377 | kfree(nsmtd); /* Free other structures */ |
514087e7 | 2378 | free_lists(); |
1da177e4 LT |
2379 | } |
2380 | ||
2381 | module_exit(ns_cleanup_module); | |
2382 | ||
2383 | MODULE_LICENSE ("GPL"); | |
2384 | MODULE_AUTHOR ("Artem B. Bityuckiy"); | |
2385 | MODULE_DESCRIPTION ("The NAND flash simulator"); |