2 * Handles the M-Systems DiskOnChip G3 chip
4 * Copyright (C) 2011 Robert Jarzmik
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/mtd/mtd.h>
28 * Flash memory areas :
29 * - 0x0000 .. 0x07ff : IPL
30 * - 0x0800 .. 0x0fff : Data area
31 * - 0x1000 .. 0x17ff : Registers
32 * - 0x1800 .. 0x1fff : Unknown
34 #define DOC_IOSPACE_IPL 0x0000
35 #define DOC_IOSPACE_DATA 0x0800
36 #define DOC_IOSPACE_SIZE 0x2000
39 * DOC G3 layout and adressing scheme
40 * A page address for the block "b", plane "P" and page "p":
41 * address = [bbbb bPpp pppp]
44 #define DOC_ADDR_PAGE_MASK 0x3f
45 #define DOC_ADDR_BLOCK_SHIFT 6
46 #define DOC_LAYOUT_NBPLANES 2
47 #define DOC_LAYOUT_PAGES_PER_BLOCK 64
48 #define DOC_LAYOUT_PAGE_SIZE 512
49 #define DOC_LAYOUT_OOB_SIZE 16
50 #define DOC_LAYOUT_WEAR_SIZE 8
51 #define DOC_LAYOUT_PAGE_OOB_SIZE \
52 (DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_SIZE)
53 #define DOC_LAYOUT_WEAR_OFFSET (DOC_LAYOUT_PAGE_OOB_SIZE * 2)
54 #define DOC_LAYOUT_BLOCK_SIZE \
55 (DOC_LAYOUT_PAGES_PER_BLOCK * DOC_LAYOUT_PAGE_SIZE)
58 * ECC related constants
60 #define DOC_ECC_BCH_M 14
61 #define DOC_ECC_BCH_T 4
62 #define DOC_ECC_BCH_PRIMPOLY 0x4443
63 #define DOC_ECC_BCH_SIZE 7
64 #define DOC_ECC_BCH_COVERED_BYTES \
65 (DOC_LAYOUT_PAGE_SIZE + DOC_LAYOUT_OOB_PAGEINFO_SZ + \
66 DOC_LAYOUT_OOB_HAMMING_SZ)
67 #define DOC_ECC_BCH_TOTAL_BYTES \
68 (DOC_ECC_BCH_COVERED_BYTES + DOC_LAYOUT_OOB_BCH_SZ)
73 #define DOC_LAYOUT_BLOCK_BBT 0
74 #define DOC_LAYOUT_BLOCK_OTP 0
75 #define DOC_LAYOUT_BLOCK_FIRST_DATA 6
77 #define DOC_LAYOUT_PAGE_BBT 4
80 * Extra page OOB (16 bytes wide) layout
82 #define DOC_LAYOUT_OOB_PAGEINFO_OFS 0
83 #define DOC_LAYOUT_OOB_HAMMING_OFS 7
84 #define DOC_LAYOUT_OOB_BCH_OFS 8
85 #define DOC_LAYOUT_OOB_UNUSED_OFS 15
86 #define DOC_LAYOUT_OOB_PAGEINFO_SZ 7
87 #define DOC_LAYOUT_OOB_HAMMING_SZ 1
88 #define DOC_LAYOUT_OOB_BCH_SZ 7
89 #define DOC_LAYOUT_OOB_UNUSED_SZ 1
92 #define DOC_CHIPID_G3 0x200
93 #define DOC_ERASE_MARK 0xaa
94 #define DOC_MAX_NBFLOORS 4
98 #define DOC_CHIPID 0x1000
99 #define DOC_TEST 0x1004
100 #define DOC_BUSLOCK 0x1006
101 #define DOC_ENDIANCONTROL 0x1008
102 #define DOC_DEVICESELECT 0x100a
103 #define DOC_ASICMODE 0x100c
104 #define DOC_CONFIGURATION 0x100e
105 #define DOC_INTERRUPTCONTROL 0x1010
106 #define DOC_READADDRESS 0x101a
107 #define DOC_DATAEND 0x101e
108 #define DOC_INTERRUPTSTATUS 0x1020
110 #define DOC_FLASHSEQUENCE 0x1032
111 #define DOC_FLASHCOMMAND 0x1034
112 #define DOC_FLASHADDRESS 0x1036
113 #define DOC_FLASHCONTROL 0x1038
114 #define DOC_NOP 0x103e
116 #define DOC_ECCCONF0 0x1040
117 #define DOC_ECCCONF1 0x1042
118 #define DOC_ECCPRESET 0x1044
119 #define DOC_HAMMINGPARITY 0x1046
120 #define DOC_BCH_HW_ECC(idx) (0x1048 + idx)
122 #define DOC_PROTECTION 0x1056
123 #define DOC_DPS0_KEY 0x105c
124 #define DOC_DPS1_KEY 0x105e
125 #define DOC_DPS0_ADDRLOW 0x1060
126 #define DOC_DPS0_ADDRHIGH 0x1062
127 #define DOC_DPS1_ADDRLOW 0x1064
128 #define DOC_DPS1_ADDRHIGH 0x1066
129 #define DOC_DPS0_STATUS 0x106c
130 #define DOC_DPS1_STATUS 0x106e
132 #define DOC_ASICMODECONFIRM 0x1072
133 #define DOC_CHIPID_INV 0x1074
134 #define DOC_POWERMODE 0x107c
138 * A sequence is preset before one or more commands are input to the chip.
140 #define DOC_SEQ_RESET 0x00
141 #define DOC_SEQ_PAGE_SIZE_532 0x03
142 #define DOC_SEQ_SET_FASTMODE 0x05
143 #define DOC_SEQ_SET_RELIABLEMODE 0x09
144 #define DOC_SEQ_READ 0x12
145 #define DOC_SEQ_SET_PLANE1 0x0e
146 #define DOC_SEQ_SET_PLANE2 0x10
147 #define DOC_SEQ_PAGE_SETUP 0x1d
148 #define DOC_SEQ_ERASE 0x27
149 #define DOC_SEQ_PLANES_STATUS 0x31
154 #define DOC_CMD_READ_PLANE1 0x00
155 #define DOC_CMD_SET_ADDR_READ 0x05
156 #define DOC_CMD_READ_ALL_PLANES 0x30
157 #define DOC_CMD_READ_PLANE2 0x50
158 #define DOC_CMD_READ_FLASH 0xe0
159 #define DOC_CMD_PAGE_SIZE_532 0x3c
161 #define DOC_CMD_PROG_BLOCK_ADDR 0x60
162 #define DOC_CMD_PROG_CYCLE1 0x80
163 #define DOC_CMD_PROG_CYCLE2 0x10
164 #define DOC_CMD_PROG_CYCLE3 0x11
165 #define DOC_CMD_ERASECYCLE2 0xd0
166 #define DOC_CMD_READ_STATUS 0x70
167 #define DOC_CMD_PLANES_STATUS 0x71
169 #define DOC_CMD_RELIABLE_MODE 0x22
170 #define DOC_CMD_FAST_MODE 0xa2
172 #define DOC_CMD_RESET 0xff
175 * Flash register : DOC_FLASHCONTROL
177 #define DOC_CTRL_VIOLATION 0x20
178 #define DOC_CTRL_CE 0x10
179 #define DOC_CTRL_UNKNOWN_BITS 0x08
180 #define DOC_CTRL_PROTECTION_ERROR 0x04
181 #define DOC_CTRL_SEQUENCE_ERROR 0x02
182 #define DOC_CTRL_FLASHREADY 0x01
185 * Flash register : DOC_ASICMODE
187 #define DOC_ASICMODE_RESET 0x00
188 #define DOC_ASICMODE_NORMAL 0x01
189 #define DOC_ASICMODE_POWERDOWN 0x02
190 #define DOC_ASICMODE_MDWREN 0x04
191 #define DOC_ASICMODE_BDETCT_RESET 0x08
192 #define DOC_ASICMODE_RSTIN_RESET 0x10
193 #define DOC_ASICMODE_RAM_WE 0x20
196 * Flash register : DOC_ECCCONF0
198 #define DOC_ECCCONF0_WRITE_MODE 0x0000
199 #define DOC_ECCCONF0_READ_MODE 0x8000
200 #define DOC_ECCCONF0_AUTO_ECC_ENABLE 0x4000
201 #define DOC_ECCCONF0_HAMMING_ENABLE 0x1000
202 #define DOC_ECCCONF0_BCH_ENABLE 0x0800
203 #define DOC_ECCCONF0_DATA_BYTES_MASK 0x07ff
206 * Flash register : DOC_ECCCONF1
208 #define DOC_ECCCONF1_BCH_SYNDROM_ERR 0x80
209 #define DOC_ECCCONF1_UNKOWN1 0x40
210 #define DOC_ECCCONF1_PAGE_IS_WRITTEN 0x20
211 #define DOC_ECCCONF1_UNKOWN3 0x10
212 #define DOC_ECCCONF1_HAMMING_BITS_MASK 0x0f
215 * Flash register : DOC_PROTECTION
217 #define DOC_PROTECT_FOUNDRY_OTP_LOCK 0x01
218 #define DOC_PROTECT_CUSTOMER_OTP_LOCK 0x02
219 #define DOC_PROTECT_LOCK_INPUT 0x04
220 #define DOC_PROTECT_STICKY_LOCK 0x08
221 #define DOC_PROTECT_PROTECTION_ENABLED 0x10
222 #define DOC_PROTECT_IPL_DOWNLOAD_LOCK 0x20
223 #define DOC_PROTECT_PROTECTION_ERROR 0x80
226 * Flash register : DOC_DPS0_STATUS and DOC_DPS1_STATUS
228 #define DOC_DPS_OTP_PROTECTED 0x01
229 #define DOC_DPS_READ_PROTECTED 0x02
230 #define DOC_DPS_WRITE_PROTECTED 0x04
231 #define DOC_DPS_HW_LOCK_ENABLED 0x08
232 #define DOC_DPS_KEY_OK 0x80
235 * Flash register : DOC_CONFIGURATION
237 #define DOC_CONF_IF_CFG 0x80
238 #define DOC_CONF_MAX_ID_MASK 0x30
239 #define DOC_CONF_VCCQ_3V 0x01
242 * Flash register : DOC_READADDRESS
244 #define DOC_READADDR_INC 0x8000
245 #define DOC_READADDR_ONE_BYTE 0x4000
246 #define DOC_READADDR_ADDR_MASK 0x1fff
249 * Flash register : DOC_POWERMODE
251 #define DOC_POWERDOWN_READY 0x80
254 * Status of erase and write operation
256 #define DOC_PLANES_STATUS_FAIL 0x01
257 #define DOC_PLANES_STATUS_PLANE0_KO 0x02
258 #define DOC_PLANES_STATUS_PLANE1_KO 0x04
263 * Each floor of docg3 has 2 protection areas: DPS0 and DPS1. These areas span
264 * across block boundaries, and define whether these blocks can be read or
266 * The definition is dynamically stored in page 0 of blocks (2,3) for DPS0, and
267 * page 0 of blocks (4,5) for DPS1.
269 #define DOC_LAYOUT_DPS_KEY_LENGTH 8
272 * struct docg3_cascade - Cascade of 1 to 4 docg3 chips
273 * @floors: floors (ie. one physical docg3 chip is one floor)
274 * @base: IO space to access all chips in the cascade
275 * @bch: the BCH correcting control structure
276 * @lock: lock to protect docg3 IO space from concurrent accesses
278 struct docg3_cascade {
279 struct mtd_info *floors[DOC_MAX_NBFLOORS];
281 struct bch_control *bch;
286 * struct docg3 - DiskOnChip driver private data
287 * @dev: the device currently under control
288 * @cascade: the cascade this device belongs to
289 * @device_id: number of the cascaded DoCG3 device (0, 1, 2 or 3)
290 * @if_cfg: if true, reads are on 16bits, else reads are on 8bits
292 * @reliable: if 0, docg3 in normal mode, if 1 docg3 in fast mode, if 2 in
294 * Fast mode implies more errors than normal mode.
295 * Reliable mode implies that page 2*n and 2*n+1 are clones.
296 * @bbt: bad block table cache
297 * @oob_write_ofs: offset of the MTD where this OOB should belong (ie. in next
299 * @oob_autoecc: if 1, use only bytes 0-7, 15, and fill the others with HW ECC
300 * if 0, use all the 16 bytes.
301 * @oob_write_buf: prepared OOB for next page_write
305 struct docg3_cascade *cascade;
306 unsigned int device_id:4;
307 unsigned int if_cfg:1;
308 unsigned int reliable:2;
311 loff_t oob_write_ofs;
313 u8 oob_write_buf[DOC_LAYOUT_OOB_SIZE];
316 #define doc_err(fmt, arg...) dev_err(docg3->dev, (fmt), ## arg)
317 #define doc_info(fmt, arg...) dev_info(docg3->dev, (fmt), ## arg)
318 #define doc_dbg(fmt, arg...) dev_dbg(docg3->dev, (fmt), ## arg)
319 #define doc_vdbg(fmt, arg...) dev_vdbg(docg3->dev, (fmt), ## arg)
321 #define DEBUGFS_RO_ATTR(name, show_fct) \
322 static int name##_open(struct inode *inode, struct file *file) \
323 { return single_open(file, show_fct, inode->i_private); } \
324 static const struct file_operations name##_fops = { \
325 .owner = THIS_MODULE, \
326 .open = name##_open, \
327 .llseek = seq_lseek, \
329 .release = single_release \
337 #define TRACE_SYSTEM docg3
339 #if !defined(_MTD_DOCG3_TRACE) || defined(TRACE_HEADER_MULTI_READ)
340 #define _MTD_DOCG3_TRACE
342 #include <linux/tracepoint.h>
344 TRACE_EVENT(docg3_io,
345 TP_PROTO(int op, int width, u16 reg, int val),
346 TP_ARGS(op, width, reg, val),
349 __field(unsigned char, width)
354 __entry->width = width;
356 __entry->val = val;),
357 TP_printk("docg3: %s%02d reg=%04x, val=%04x",
358 __entry->op ? "write" : "read", __entry->width,
359 __entry->reg, __entry->val)
363 /* This part must be outside protection */
364 #undef TRACE_INCLUDE_PATH
365 #undef TRACE_INCLUDE_FILE
366 #define TRACE_INCLUDE_PATH .
367 #define TRACE_INCLUDE_FILE docg3
368 #include <trace/define_trace.h>