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-rw-r--r--drivers/mtd/onenand/Kconfig38
-rw-r--r--drivers/mtd/onenand/Makefile11
-rw-r--r--drivers/mtd/onenand/generic.c147
-rw-r--r--drivers/mtd/onenand/onenand_base.c1588
-rw-r--r--drivers/mtd/onenand/onenand_bbt.c246
5 files changed, 2030 insertions, 0 deletions
diff --git a/drivers/mtd/onenand/Kconfig b/drivers/mtd/onenand/Kconfig
new file mode 100644
index 000000000000..126ff6bf63d5
--- /dev/null
+++ b/drivers/mtd/onenand/Kconfig
@@ -0,0 +1,38 @@
1#
2# linux/drivers/mtd/onenand/Kconfig
3#
4
5menu "OneNAND Flash Device Drivers"
6 depends on MTD != n
7
8config MTD_ONENAND
9 tristate "OneNAND Device Support"
10 depends on MTD
11 help
12 This enables support for accessing all type of OneNAND flash
13 devices. For further information see
14 <http://www.samsung.com/Products/Semiconductor/Flash/OneNAND_TM/index.htm>.
15
16config MTD_ONENAND_VERIFY_WRITE
17 bool "Verify OneNAND page writes"
18 depends on MTD_ONENAND
19 help
20 This adds an extra check when data is written to the flash. The
21 OneNAND flash device internally checks only bits transitioning
22 from 1 to 0. There is a rare possibility that even though the
23 device thinks the write was successful, a bit could have been
24 flipped accidentaly due to device wear or something else.
25
26config MTD_ONENAND_GENERIC
27 tristate "OneNAND Flash device via platform device driver"
28 depends on MTD_ONENAND && ARM
29 help
30 Support for OneNAND flash via platform device driver.
31
32config MTD_ONENAND_SYNC_READ
33 bool "OneNAND Sync. Burst Read Support"
34 depends on ARCH_OMAP
35 help
36 This enables support for Sync. Burst Read.
37
38endmenu
diff --git a/drivers/mtd/onenand/Makefile b/drivers/mtd/onenand/Makefile
new file mode 100644
index 000000000000..269cfe467345
--- /dev/null
+++ b/drivers/mtd/onenand/Makefile
@@ -0,0 +1,11 @@
1#
2# Makefile for the OneNAND MTD
3#
4
5# Core functionality.
6obj-$(CONFIG_MTD_ONENAND) += onenand.o
7
8# Board specific.
9obj-$(CONFIG_MTD_ONENAND_GENERIC) += generic.o
10
11onenand-objs = onenand_base.o onenand_bbt.o
diff --git a/drivers/mtd/onenand/generic.c b/drivers/mtd/onenand/generic.c
new file mode 100644
index 000000000000..48cce431f89f
--- /dev/null
+++ b/drivers/mtd/onenand/generic.c
@@ -0,0 +1,147 @@
1/*
2 * linux/drivers/mtd/onenand/generic.c
3 *
4 * Copyright (c) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * Overview:
12 * This is a device driver for the OneNAND flash for generic boards.
13 */
14
15#include <linux/device.h>
16#include <linux/module.h>
17#include <linux/init.h>
18#include <linux/mtd/mtd.h>
19#include <linux/mtd/onenand.h>
20#include <linux/mtd/partitions.h>
21
22#include <asm/io.h>
23#include <asm/mach/flash.h>
24
25#define DRIVER_NAME "onenand"
26
27
28#ifdef CONFIG_MTD_PARTITIONS
29static const char *part_probes[] = { "cmdlinepart", NULL, };
30#endif
31
32struct onenand_info {
33 struct mtd_info mtd;
34 struct mtd_partition *parts;
35 struct onenand_chip onenand;
36};
37
38static int __devinit generic_onenand_probe(struct device *dev)
39{
40 struct onenand_info *info;
41 struct platform_device *pdev = to_platform_device(dev);
42 struct onenand_platform_data *pdata = pdev->dev.platform_data;
43 struct resource *res = pdev->resource;
44 unsigned long size = res->end - res->start + 1;
45 int err;
46
47 info = kmalloc(sizeof(struct onenand_info), GFP_KERNEL);
48 if (!info)
49 return -ENOMEM;
50
51 memset(info, 0, sizeof(struct onenand_info));
52
53 if (!request_mem_region(res->start, size, dev->driver->name)) {
54 err = -EBUSY;
55 goto out_free_info;
56 }
57
58 info->onenand.base = ioremap(res->start, size);
59 if (!info->onenand.base) {
60 err = -ENOMEM;
61 goto out_release_mem_region;
62 }
63
64 info->onenand.mmcontrol = pdata->mmcontrol;
65
66 info->mtd.name = pdev->dev.bus_id;
67 info->mtd.priv = &info->onenand;
68 info->mtd.owner = THIS_MODULE;
69
70 if (onenand_scan(&info->mtd, 1)) {
71 err = -ENXIO;
72 goto out_iounmap;
73 }
74
75#ifdef CONFIG_MTD_PARTITIONS
76 err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
77 if (err > 0)
78 add_mtd_partitions(&info->mtd, info->parts, err);
79 else if (err < 0 && pdata->parts)
80 add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
81 else
82#endif
83 err = add_mtd_device(&info->mtd);
84
85 dev_set_drvdata(&pdev->dev, info);
86
87 return 0;
88
89out_iounmap:
90 iounmap(info->onenand.base);
91out_release_mem_region:
92 release_mem_region(res->start, size);
93out_free_info:
94 kfree(info);
95
96 return err;
97}
98
99static int __devexit generic_onenand_remove(struct device *dev)
100{
101 struct platform_device *pdev = to_platform_device(dev);
102 struct onenand_info *info = dev_get_drvdata(&pdev->dev);
103 struct resource *res = pdev->resource;
104 unsigned long size = res->end - res->start + 1;
105
106 dev_set_drvdata(&pdev->dev, NULL);
107
108 if (info) {
109 if (info->parts)
110 del_mtd_partitions(&info->mtd);
111 else
112 del_mtd_device(&info->mtd);
113
114 onenand_release(&info->mtd);
115 release_mem_region(res->start, size);
116 iounmap(info->onenand.base);
117 kfree(info);
118 }
119
120 return 0;
121}
122
123static struct device_driver generic_onenand_driver = {
124 .name = DRIVER_NAME,
125 .bus = &platform_bus_type,
126 .probe = generic_onenand_probe,
127 .remove = __devexit_p(generic_onenand_remove),
128};
129
130MODULE_ALIAS(DRIVER_NAME);
131
132static int __init generic_onenand_init(void)
133{
134 return driver_register(&generic_onenand_driver);
135}
136
137static void __exit generic_onenand_exit(void)
138{
139 driver_unregister(&generic_onenand_driver);
140}
141
142module_init(generic_onenand_init);
143module_exit(generic_onenand_exit);
144
145MODULE_LICENSE("GPL");
146MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
147MODULE_DESCRIPTION("Glue layer for OneNAND flash on generic boards");
diff --git a/drivers/mtd/onenand/onenand_base.c b/drivers/mtd/onenand/onenand_base.c
new file mode 100644
index 000000000000..cc38fa0d45c6
--- /dev/null
+++ b/drivers/mtd/onenand/onenand_base.c
@@ -0,0 +1,1588 @@
1/*
2 * linux/drivers/mtd/onenand/onenand_base.c
3 *
4 * Copyright (C) 2005 Samsung Electronics
5 * Kyungmin Park <kyungmin.park@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/init.h>
15#include <linux/mtd/mtd.h>
16#include <linux/mtd/onenand.h>
17#include <linux/mtd/partitions.h>
18
19#include <asm/io.h>
20
21/**
22 * onenand_oob_64 - oob info for large (2KB) page
23 */
24static struct nand_oobinfo onenand_oob_64 = {
25 .useecc = MTD_NANDECC_AUTOPLACE,
26 .eccbytes = 20,
27 .eccpos = {
28 8, 9, 10, 11, 12,
29 24, 25, 26, 27, 28,
30 40, 41, 42, 43, 44,
31 56, 57, 58, 59, 60,
32 },
33 .oobfree = {
34 {2, 3}, {14, 2}, {18, 3}, {30, 2},
35 {24, 3}, {46, 2}, {40, 3}, {62, 2} }
36};
37
38/**
39 * onenand_oob_32 - oob info for middle (1KB) page
40 */
41static struct nand_oobinfo onenand_oob_32 = {
42 .useecc = MTD_NANDECC_AUTOPLACE,
43 .eccbytes = 10,
44 .eccpos = {
45 8, 9, 10, 11, 12,
46 24, 25, 26, 27, 28,
47 },
48 .oobfree = { {2, 3}, {14, 2}, {18, 3}, {30, 2} }
49};
50
51static const unsigned char ffchars[] = {
52 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
53 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 16 */
54 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
55 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 32 */
56 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
57 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 48 */
58 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
59 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, /* 64 */
60};
61
62/**
63 * onenand_readw - [OneNAND Interface] Read OneNAND register
64 * @param addr address to read
65 *
66 * Read OneNAND register
67 */
68static unsigned short onenand_readw(void __iomem *addr)
69{
70 return readw(addr);
71}
72
73/**
74 * onenand_writew - [OneNAND Interface] Write OneNAND register with value
75 * @param value value to write
76 * @param addr address to write
77 *
78 * Write OneNAND register with value
79 */
80static void onenand_writew(unsigned short value, void __iomem *addr)
81{
82 writew(value, addr);
83}
84
85/**
86 * onenand_block_address - [DEFAULT] Get block address
87 * @param this onenand chip data structure
88 * @param block the block
89 * @return translated block address if DDP, otherwise same
90 *
91 * Setup Start Address 1 Register (F100h)
92 */
93static int onenand_block_address(struct onenand_chip *this, int block)
94{
95 if (this->device_id & ONENAND_DEVICE_IS_DDP) {
96 /* Device Flash Core select, NAND Flash Block Address */
97 int dfs = 0;
98
99 if (block & this->density_mask)
100 dfs = 1;
101
102 return (dfs << ONENAND_DDP_SHIFT) |
103 (block & (this->density_mask - 1));
104 }
105
106 return block;
107}
108
109/**
110 * onenand_bufferram_address - [DEFAULT] Get bufferram address
111 * @param this onenand chip data structure
112 * @param block the block
113 * @return set DBS value if DDP, otherwise 0
114 *
115 * Setup Start Address 2 Register (F101h) for DDP
116 */
117static int onenand_bufferram_address(struct onenand_chip *this, int block)
118{
119 if (this->device_id & ONENAND_DEVICE_IS_DDP) {
120 /* Device BufferRAM Select */
121 int dbs = 0;
122
123 if (block & this->density_mask)
124 dbs = 1;
125
126 return (dbs << ONENAND_DDP_SHIFT);
127 }
128
129 return 0;
130}
131
132/**
133 * onenand_page_address - [DEFAULT] Get page address
134 * @param page the page address
135 * @param sector the sector address
136 * @return combined page and sector address
137 *
138 * Setup Start Address 8 Register (F107h)
139 */
140static int onenand_page_address(int page, int sector)
141{
142 /* Flash Page Address, Flash Sector Address */
143 int fpa, fsa;
144
145 fpa = page & ONENAND_FPA_MASK;
146 fsa = sector & ONENAND_FSA_MASK;
147
148 return ((fpa << ONENAND_FPA_SHIFT) | fsa);
149}
150
151/**
152 * onenand_buffer_address - [DEFAULT] Get buffer address
153 * @param dataram1 DataRAM index
154 * @param sectors the sector address
155 * @param count the number of sectors
156 * @return the start buffer value
157 *
158 * Setup Start Buffer Register (F200h)
159 */
160static int onenand_buffer_address(int dataram1, int sectors, int count)
161{
162 int bsa, bsc;
163
164 /* BufferRAM Sector Address */
165 bsa = sectors & ONENAND_BSA_MASK;
166
167 if (dataram1)
168 bsa |= ONENAND_BSA_DATARAM1; /* DataRAM1 */
169 else
170 bsa |= ONENAND_BSA_DATARAM0; /* DataRAM0 */
171
172 /* BufferRAM Sector Count */
173 bsc = count & ONENAND_BSC_MASK;
174
175 return ((bsa << ONENAND_BSA_SHIFT) | bsc);
176}
177
178/**
179 * onenand_command - [DEFAULT] Send command to OneNAND device
180 * @param mtd MTD device structure
181 * @param cmd the command to be sent
182 * @param addr offset to read from or write to
183 * @param len number of bytes to read or write
184 *
185 * Send command to OneNAND device. This function is used for middle/large page
186 * devices (1KB/2KB Bytes per page)
187 */
188static int onenand_command(struct mtd_info *mtd, int cmd, loff_t addr, size_t len)
189{
190 struct onenand_chip *this = mtd->priv;
191 int value, readcmd = 0;
192 int block, page;
193 /* Now we use page size operation */
194 int sectors = 4, count = 4;
195
196 /* Address translation */
197 switch (cmd) {
198 case ONENAND_CMD_UNLOCK:
199 case ONENAND_CMD_LOCK:
200 case ONENAND_CMD_LOCK_TIGHT:
201 block = -1;
202 page = -1;
203 break;
204
205 case ONENAND_CMD_ERASE:
206 case ONENAND_CMD_BUFFERRAM:
207 block = (int) (addr >> this->erase_shift);
208 page = -1;
209 break;
210
211 default:
212 block = (int) (addr >> this->erase_shift);
213 page = (int) (addr >> this->page_shift);
214 page &= this->page_mask;
215 break;
216 }
217
218 /* NOTE: The setting order of the registers is very important! */
219 if (cmd == ONENAND_CMD_BUFFERRAM) {
220 /* Select DataRAM for DDP */
221 value = onenand_bufferram_address(this, block);
222 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
223
224 /* Switch to the next data buffer */
225 ONENAND_SET_NEXT_BUFFERRAM(this);
226
227 return 0;
228 }
229
230 if (block != -1) {
231 /* Write 'DFS, FBA' of Flash */
232 value = onenand_block_address(this, block);
233 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
234 }
235
236 if (page != -1) {
237 int dataram;
238
239 switch (cmd) {
240 case ONENAND_CMD_READ:
241 case ONENAND_CMD_READOOB:
242 dataram = ONENAND_SET_NEXT_BUFFERRAM(this);
243 readcmd = 1;
244 break;
245
246 default:
247 dataram = ONENAND_CURRENT_BUFFERRAM(this);
248 break;
249 }
250
251 /* Write 'FPA, FSA' of Flash */
252 value = onenand_page_address(page, sectors);
253 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS8);
254
255 /* Write 'BSA, BSC' of DataRAM */
256 value = onenand_buffer_address(dataram, sectors, count);
257 this->write_word(value, this->base + ONENAND_REG_START_BUFFER);
258
259 if (readcmd) {
260 /* Select DataRAM for DDP */
261 value = onenand_bufferram_address(this, block);
262 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS2);
263 }
264 }
265
266 /* Interrupt clear */
267 this->write_word(ONENAND_INT_CLEAR, this->base + ONENAND_REG_INTERRUPT);
268
269 /* Write command */
270 this->write_word(cmd, this->base + ONENAND_REG_COMMAND);
271
272 return 0;
273}
274
275/**
276 * onenand_wait - [DEFAULT] wait until the command is done
277 * @param mtd MTD device structure
278 * @param state state to select the max. timeout value
279 *
280 * Wait for command done. This applies to all OneNAND command
281 * Read can take up to 30us, erase up to 2ms and program up to 350us
282 * according to general OneNAND specs
283 */
284static int onenand_wait(struct mtd_info *mtd, int state)
285{
286 struct onenand_chip * this = mtd->priv;
287 unsigned long timeout;
288 unsigned int flags = ONENAND_INT_MASTER;
289 unsigned int interrupt = 0;
290 unsigned int ctrl, ecc;
291
292 /* The 20 msec is enough */
293 timeout = jiffies + msecs_to_jiffies(20);
294 while (time_before(jiffies, timeout)) {
295 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
296
297 if (interrupt & flags)
298 break;
299
300 if (state != FL_READING)
301 cond_resched();
302 }
303 /* To get correct interrupt status in timeout case */
304 interrupt = this->read_word(this->base + ONENAND_REG_INTERRUPT);
305
306 ctrl = this->read_word(this->base + ONENAND_REG_CTRL_STATUS);
307
308 if (ctrl & ONENAND_CTRL_ERROR) {
309 /* It maybe occur at initial bad block */
310 DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: controller error = 0x%04x\n", ctrl);
311 /* Clear other interrupt bits for preventing ECC error */
312 interrupt &= ONENAND_INT_MASTER;
313 }
314
315 if (ctrl & ONENAND_CTRL_LOCK) {
316 DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: it's locked error = 0x%04x\n", ctrl);
317 return -EACCES;
318 }
319
320 if (interrupt & ONENAND_INT_READ) {
321 ecc = this->read_word(this->base + ONENAND_REG_ECC_STATUS);
322 if (ecc & ONENAND_ECC_2BIT_ALL) {
323 DEBUG(MTD_DEBUG_LEVEL0, "onenand_wait: ECC error = 0x%04x\n", ecc);
324 return -EBADMSG;
325 }
326 }
327
328 return 0;
329}
330
331/**
332 * onenand_bufferram_offset - [DEFAULT] BufferRAM offset
333 * @param mtd MTD data structure
334 * @param area BufferRAM area
335 * @return offset given area
336 *
337 * Return BufferRAM offset given area
338 */
339static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area)
340{
341 struct onenand_chip *this = mtd->priv;
342
343 if (ONENAND_CURRENT_BUFFERRAM(this)) {
344 if (area == ONENAND_DATARAM)
345 return mtd->oobblock;
346 if (area == ONENAND_SPARERAM)
347 return mtd->oobsize;
348 }
349
350 return 0;
351}
352
353/**
354 * onenand_read_bufferram - [OneNAND Interface] Read the bufferram area
355 * @param mtd MTD data structure
356 * @param area BufferRAM area
357 * @param buffer the databuffer to put/get data
358 * @param offset offset to read from or write to
359 * @param count number of bytes to read/write
360 *
361 * Read the BufferRAM area
362 */
363static int onenand_read_bufferram(struct mtd_info *mtd, int area,
364 unsigned char *buffer, int offset, size_t count)
365{
366 struct onenand_chip *this = mtd->priv;
367 void __iomem *bufferram;
368
369 bufferram = this->base + area;
370
371 bufferram += onenand_bufferram_offset(mtd, area);
372
373 memcpy(buffer, bufferram + offset, count);
374
375 return 0;
376}
377
378/**
379 * onenand_sync_read_bufferram - [OneNAND Interface] Read the bufferram area with Sync. Burst mode
380 * @param mtd MTD data structure
381 * @param area BufferRAM area
382 * @param buffer the databuffer to put/get data
383 * @param offset offset to read from or write to
384 * @param count number of bytes to read/write
385 *
386 * Read the BufferRAM area with Sync. Burst Mode
387 */
388static int onenand_sync_read_bufferram(struct mtd_info *mtd, int area,
389 unsigned char *buffer, int offset, size_t count)
390{
391 struct onenand_chip *this = mtd->priv;
392 void __iomem *bufferram;
393
394 bufferram = this->base + area;
395
396 bufferram += onenand_bufferram_offset(mtd, area);
397
398 this->mmcontrol(mtd, ONENAND_SYS_CFG1_SYNC_READ);
399
400 memcpy(buffer, bufferram + offset, count);
401
402 this->mmcontrol(mtd, 0);
403
404 return 0;
405}
406
407/**
408 * onenand_write_bufferram - [OneNAND Interface] Write the bufferram area
409 * @param mtd MTD data structure
410 * @param area BufferRAM area
411 * @param buffer the databuffer to put/get data
412 * @param offset offset to read from or write to
413 * @param count number of bytes to read/write
414 *
415 * Write the BufferRAM area
416 */
417static int onenand_write_bufferram(struct mtd_info *mtd, int area,
418 const unsigned char *buffer, int offset, size_t count)
419{
420 struct onenand_chip *this = mtd->priv;
421 void __iomem *bufferram;
422
423 bufferram = this->base + area;
424
425 bufferram += onenand_bufferram_offset(mtd, area);
426
427 memcpy(bufferram + offset, buffer, count);
428
429 return 0;
430}
431
432/**
433 * onenand_check_bufferram - [GENERIC] Check BufferRAM information
434 * @param mtd MTD data structure
435 * @param addr address to check
436 * @return 1 if there are valid data, otherwise 0
437 *
438 * Check bufferram if there is data we required
439 */
440static int onenand_check_bufferram(struct mtd_info *mtd, loff_t addr)
441{
442 struct onenand_chip *this = mtd->priv;
443 int block, page;
444 int i;
445
446 block = (int) (addr >> this->erase_shift);
447 page = (int) (addr >> this->page_shift);
448 page &= this->page_mask;
449
450 i = ONENAND_CURRENT_BUFFERRAM(this);
451
452 /* Is there valid data? */
453 if (this->bufferram[i].block == block &&
454 this->bufferram[i].page == page &&
455 this->bufferram[i].valid)
456 return 1;
457
458 return 0;
459}
460
461/**
462 * onenand_update_bufferram - [GENERIC] Update BufferRAM information
463 * @param mtd MTD data structure
464 * @param addr address to update
465 * @param valid valid flag
466 *
467 * Update BufferRAM information
468 */
469static int onenand_update_bufferram(struct mtd_info *mtd, loff_t addr,
470 int valid)
471{
472 struct onenand_chip *this = mtd->priv;
473 int block, page;
474 int i;
475
476 block = (int) (addr >> this->erase_shift);
477 page = (int) (addr >> this->page_shift);
478 page &= this->page_mask;
479
480 /* Invalidate BufferRAM */
481 for (i = 0; i < MAX_BUFFERRAM; i++) {
482 if (this->bufferram[i].block == block &&
483 this->bufferram[i].page == page)
484 this->bufferram[i].valid = 0;
485 }
486
487 /* Update BufferRAM */
488 i = ONENAND_CURRENT_BUFFERRAM(this);
489 this->bufferram[i].block = block;
490 this->bufferram[i].page = page;
491 this->bufferram[i].valid = valid;
492
493 return 0;
494}
495
496/**
497 * onenand_get_device - [GENERIC] Get chip for selected access
498 * @param mtd MTD device structure
499 * @param new_state the state which is requested
500 *
501 * Get the device and lock it for exclusive access
502 */
503static int onenand_get_device(struct mtd_info *mtd, int new_state)
504{
505 struct onenand_chip *this = mtd->priv;
506 DECLARE_WAITQUEUE(wait, current);
507
508 /*
509 * Grab the lock and see if the device is available
510 */
511 while (1) {
512 spin_lock(&this->chip_lock);
513 if (this->state == FL_READY) {
514 this->state = new_state;
515 spin_unlock(&this->chip_lock);
516 break;
517 }
518 if (new_state == FL_PM_SUSPENDED) {
519 spin_unlock(&this->chip_lock);
520 return (this->state == FL_PM_SUSPENDED) ? 0 : -EAGAIN;
521 }
522 set_current_state(TASK_UNINTERRUPTIBLE);
523 add_wait_queue(&this->wq, &wait);
524 spin_unlock(&this->chip_lock);
525 schedule();
526 remove_wait_queue(&this->wq, &wait);
527 }
528
529 return 0;
530}
531
532/**
533 * onenand_release_device - [GENERIC] release chip
534 * @param mtd MTD device structure
535 *
536 * Deselect, release chip lock and wake up anyone waiting on the device
537 */
538static void onenand_release_device(struct mtd_info *mtd)
539{
540 struct onenand_chip *this = mtd->priv;
541
542 /* Release the chip */
543 spin_lock(&this->chip_lock);
544 this->state = FL_READY;
545 wake_up(&this->wq);
546 spin_unlock(&this->chip_lock);
547}
548
549/**
550 * onenand_read_ecc - [MTD Interface] Read data with ECC
551 * @param mtd MTD device structure
552 * @param from offset to read from
553 * @param len number of bytes to read
554 * @param retlen pointer to variable to store the number of read bytes
555 * @param buf the databuffer to put data
556 * @param oob_buf filesystem supplied oob data buffer
557 * @param oobsel oob selection structure
558 *
559 * OneNAND read with ECC
560 */
561static int onenand_read_ecc(struct mtd_info *mtd, loff_t from, size_t len,
562 size_t *retlen, u_char *buf,
563 u_char *oob_buf, struct nand_oobinfo *oobsel)
564{
565 struct onenand_chip *this = mtd->priv;
566 int read = 0, column;
567 int thislen;
568 int ret = 0;
569
570 DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_ecc: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
571
572 /* Do not allow reads past end of device */
573 if ((from + len) > mtd->size) {
574 DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_ecc: Attempt read beyond end of device\n");
575 *retlen = 0;
576 return -EINVAL;
577 }
578
579 /* Grab the lock and see if the device is available */
580 onenand_get_device(mtd, FL_READING);
581
582 /* TODO handling oob */
583
584 while (read < len) {
585 thislen = min_t(int, mtd->oobblock, len - read);
586
587 column = from & (mtd->oobblock - 1);
588 if (column + thislen > mtd->oobblock)
589 thislen = mtd->oobblock - column;
590
591 if (!onenand_check_bufferram(mtd, from)) {
592 this->command(mtd, ONENAND_CMD_READ, from, mtd->oobblock);
593
594 ret = this->wait(mtd, FL_READING);
595 /* First copy data and check return value for ECC handling */
596 onenand_update_bufferram(mtd, from, 1);
597 }
598
599 this->read_bufferram(mtd, ONENAND_DATARAM, buf, column, thislen);
600
601 read += thislen;
602
603 if (read == len)
604 break;
605
606 if (ret) {
607 DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_ecc: read failed = %d\n", ret);
608 goto out;
609 }
610
611 from += thislen;
612 buf += thislen;
613 }
614
615out:
616 /* Deselect and wake up anyone waiting on the device */
617 onenand_release_device(mtd);
618
619 /*
620 * Return success, if no ECC failures, else -EBADMSG
621 * fs driver will take care of that, because
622 * retlen == desired len and result == -EBADMSG
623 */
624 *retlen = read;
625 return ret;
626}
627
628/**
629 * onenand_read - [MTD Interface] MTD compability function for onenand_read_ecc
630 * @param mtd MTD device structure
631 * @param from offset to read from
632 * @param len number of bytes to read
633 * @param retlen pointer to variable to store the number of read bytes
634 * @param buf the databuffer to put data
635 *
636 * This function simply calls onenand_read_ecc with oob buffer and oobsel = NULL
637*/
638static int onenand_read(struct mtd_info *mtd, loff_t from, size_t len,
639 size_t *retlen, u_char *buf)
640{
641 return onenand_read_ecc(mtd, from, len, retlen, buf, NULL, NULL);
642}
643
644/**
645 * onenand_read_oob - [MTD Interface] OneNAND read out-of-band
646 * @param mtd MTD device structure
647 * @param from offset to read from
648 * @param len number of bytes to read
649 * @param retlen pointer to variable to store the number of read bytes
650 * @param buf the databuffer to put data
651 *
652 * OneNAND read out-of-band data from the spare area
653 */
654static int onenand_read_oob(struct mtd_info *mtd, loff_t from, size_t len,
655 size_t *retlen, u_char *buf)
656{
657 struct onenand_chip *this = mtd->priv;
658 int read = 0, thislen, column;
659 int ret = 0;
660
661 DEBUG(MTD_DEBUG_LEVEL3, "onenand_read_oob: from = 0x%08x, len = %i\n", (unsigned int) from, (int) len);
662
663 /* Initialize return length value */
664 *retlen = 0;
665
666 /* Do not allow reads past end of device */
667 if (unlikely((from + len) > mtd->size)) {
668 DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: Attempt read beyond end of device\n");
669 return -EINVAL;
670 }
671
672 /* Grab the lock and see if the device is available */
673 onenand_get_device(mtd, FL_READING);
674
675 column = from & (mtd->oobsize - 1);
676
677 while (read < len) {
678 thislen = mtd->oobsize - column;
679 thislen = min_t(int, thislen, len);
680
681 this->command(mtd, ONENAND_CMD_READOOB, from, mtd->oobsize);
682
683 onenand_update_bufferram(mtd, from, 0);
684
685 ret = this->wait(mtd, FL_READING);
686 /* First copy data and check return value for ECC handling */
687
688 this->read_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
689
690 read += thislen;
691
692 if (read == len)
693 break;
694
695 if (ret) {
696 DEBUG(MTD_DEBUG_LEVEL0, "onenand_read_oob: read failed = %d\n", ret);
697 goto out;
698 }
699
700 buf += thislen;
701
702 /* Read more? */
703 if (read < len) {
704 /* Page size */
705 from += mtd->oobblock;
706 column = 0;
707 }
708 }
709
710out:
711 /* Deselect and wake up anyone waiting on the device */
712 onenand_release_device(mtd);
713
714 *retlen = read;
715 return ret;
716}
717
718#ifdef CONFIG_MTD_ONENAND_VERIFY_WRITE
719/**
720 * onenand_verify_page - [GENERIC] verify the chip contents after a write
721 * @param mtd MTD device structure
722 * @param buf the databuffer to verify
723 *
724 * Check DataRAM area directly
725 */
726static int onenand_verify_page(struct mtd_info *mtd, u_char *buf, loff_t addr)
727{
728 struct onenand_chip *this = mtd->priv;
729 void __iomem *dataram0, *dataram1;
730 int ret = 0;
731
732 this->command(mtd, ONENAND_CMD_READ, addr, mtd->oobblock);
733
734 ret = this->wait(mtd, FL_READING);
735 if (ret)
736 return ret;
737
738 onenand_update_bufferram(mtd, addr, 1);
739
740 /* Check, if the two dataram areas are same */
741 dataram0 = this->base + ONENAND_DATARAM;
742 dataram1 = dataram0 + mtd->oobblock;
743
744 if (memcmp(dataram0, dataram1, mtd->oobblock))
745 return -EBADMSG;
746
747 return 0;
748}
749#else
750#define onenand_verify_page(...) (0)
751#endif
752
753#define NOTALIGNED(x) ((x & (mtd->oobblock - 1)) != 0)
754
755/**
756 * onenand_write_ecc - [MTD Interface] OneNAND write with ECC
757 * @param mtd MTD device structure
758 * @param to offset to write to
759 * @param len number of bytes to write
760 * @param retlen pointer to variable to store the number of written bytes
761 * @param buf the data to write
762 * @param eccbuf filesystem supplied oob data buffer
763 * @param oobsel oob selection structure
764 *
765 * OneNAND write with ECC
766 */
767static int onenand_write_ecc(struct mtd_info *mtd, loff_t to, size_t len,
768 size_t *retlen, const u_char *buf,
769 u_char *eccbuf, struct nand_oobinfo *oobsel)
770{
771 struct onenand_chip *this = mtd->priv;
772 int written = 0;
773 int ret = 0;
774
775 DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_ecc: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
776
777 /* Initialize retlen, in case of early exit */
778 *retlen = 0;
779
780 /* Do not allow writes past end of device */
781 if (unlikely((to + len) > mtd->size)) {
782 DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: Attempt write to past end of device\n");
783 return -EINVAL;
784 }
785
786 /* Reject writes, which are not page aligned */
787 if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(len))) {
788 DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: Attempt to write not page aligned data\n");
789 return -EINVAL;
790 }
791
792 /* Grab the lock and see if the device is available */
793 onenand_get_device(mtd, FL_WRITING);
794
795 /* Loop until all data write */
796 while (written < len) {
797 int thislen = min_t(int, mtd->oobblock, len - written);
798
799 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
800
801 this->write_bufferram(mtd, ONENAND_DATARAM, buf, 0, thislen);
802 this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
803
804 this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
805
806 onenand_update_bufferram(mtd, to, 1);
807
808 ret = this->wait(mtd, FL_WRITING);
809 if (ret) {
810 DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: write filaed %d\n", ret);
811 goto out;
812 }
813
814 written += thislen;
815
816 /* Only check verify write turn on */
817 ret = onenand_verify_page(mtd, (u_char *) buf, to);
818 if (ret) {
819 DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_ecc: verify failed %d\n", ret);
820 goto out;
821 }
822
823 if (written == len)
824 break;
825
826 to += thislen;
827 buf += thislen;
828 }
829
830out:
831 /* Deselect and wake up anyone waiting on the device */
832 onenand_release_device(mtd);
833
834 *retlen = written;
835
836 return ret;
837}
838
839/**
840 * onenand_write - [MTD Interface] compability function for onenand_write_ecc
841 * @param mtd MTD device structure
842 * @param to offset to write to
843 * @param len number of bytes to write
844 * @param retlen pointer to variable to store the number of written bytes
845 * @param buf the data to write
846 *
847 * This function simply calls onenand_write_ecc
848 * with oob buffer and oobsel = NULL
849 */
850static int onenand_write(struct mtd_info *mtd, loff_t to, size_t len,
851 size_t *retlen, const u_char *buf)
852{
853 return onenand_write_ecc(mtd, to, len, retlen, buf, NULL, NULL);
854}
855
856/**
857 * onenand_write_oob - [MTD Interface] OneNAND write out-of-band
858 * @param mtd MTD device structure
859 * @param to offset to write to
860 * @param len number of bytes to write
861 * @param retlen pointer to variable to store the number of written bytes
862 * @param buf the data to write
863 *
864 * OneNAND write out-of-band
865 */
866static int onenand_write_oob(struct mtd_info *mtd, loff_t to, size_t len,
867 size_t *retlen, const u_char *buf)
868{
869 struct onenand_chip *this = mtd->priv;
870 int column, status;
871 int written = 0;
872
873 DEBUG(MTD_DEBUG_LEVEL3, "onenand_write_oob: to = 0x%08x, len = %i\n", (unsigned int) to, (int) len);
874
875 /* Initialize retlen, in case of early exit */
876 *retlen = 0;
877
878 /* Do not allow writes past end of device */
879 if (unlikely((to + len) > mtd->size)) {
880 DEBUG(MTD_DEBUG_LEVEL0, "onenand_write_oob: Attempt write to past end of device\n");
881 return -EINVAL;
882 }
883
884 /* Grab the lock and see if the device is available */
885 onenand_get_device(mtd, FL_WRITING);
886
887 /* Loop until all data write */
888 while (written < len) {
889 int thislen = min_t(int, mtd->oobsize, len - written);
890
891 column = to & (mtd->oobsize - 1);
892
893 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobsize);
894
895 this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
896 this->write_bufferram(mtd, ONENAND_SPARERAM, buf, column, thislen);
897
898 this->command(mtd, ONENAND_CMD_PROGOOB, to, mtd->oobsize);
899
900 onenand_update_bufferram(mtd, to, 0);
901
902 status = this->wait(mtd, FL_WRITING);
903 if (status)
904 goto out;
905
906 written += thislen;
907
908 if (written == len)
909 break;
910
911 to += thislen;
912 buf += thislen;
913 }
914
915out:
916 /* Deselect and wake up anyone waiting on the device */
917 onenand_release_device(mtd);
918
919 *retlen = written;
920
921 return 0;
922}
923
924/**
925 * onenand_writev_ecc - [MTD Interface] write with iovec with ecc
926 * @param mtd MTD device structure
927 * @param vecs the iovectors to write
928 * @param count number of vectors
929 * @param to offset to write to
930 * @param retlen pointer to variable to store the number of written bytes
931 * @param eccbuf filesystem supplied oob data buffer
932 * @param oobsel oob selection structure
933 *
934 * OneNAND write with iovec with ecc
935 */
936static int onenand_writev_ecc(struct mtd_info *mtd, const struct kvec *vecs,
937 unsigned long count, loff_t to, size_t *retlen,
938 u_char *eccbuf, struct nand_oobinfo *oobsel)
939{
940 struct onenand_chip *this = mtd->priv;
941 unsigned char buffer[MAX_ONENAND_PAGESIZE], *pbuf;
942 size_t total_len, len;
943 int i, written = 0;
944 int ret = 0;
945
946 /* Preset written len for early exit */
947 *retlen = 0;
948
949 /* Calculate total length of data */
950 total_len = 0;
951 for (i = 0; i < count; i++)
952 total_len += vecs[i].iov_len;
953
954 DEBUG(MTD_DEBUG_LEVEL3, "onenand_writev_ecc: to = 0x%08x, len = %i, count = %ld\n", (unsigned int) to, (unsigned int) total_len, count);
955
956 /* Do not allow write past end of the device */
957 if (unlikely((to + total_len) > mtd->size)) {
958 DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempted write past end of device\n");
959 return -EINVAL;
960 }
961
962 /* Reject writes, which are not page aligned */
963 if (unlikely(NOTALIGNED(to)) || unlikely(NOTALIGNED(total_len))) {
964 DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: Attempt to write not page aligned data\n");
965 return -EINVAL;
966 }
967
968 /* Grab the lock and see if the device is available */
969 onenand_get_device(mtd, FL_WRITING);
970
971 /* TODO handling oob */
972
973 /* Loop until all keve's data has been written */
974 len = 0;
975 while (count) {
976 pbuf = buffer;
977 /*
978 * If the given tuple is >= pagesize then
979 * write it out from the iov
980 */
981 if ((vecs->iov_len - len) >= mtd->oobblock) {
982 pbuf = vecs->iov_base + len;
983
984 len += mtd->oobblock;
985
986 /* Check, if we have to switch to the next tuple */
987 if (len >= (int) vecs->iov_len) {
988 vecs++;
989 len = 0;
990 count--;
991 }
992 } else {
993 int cnt = 0, thislen;
994 while (cnt < mtd->oobblock) {
995 thislen = min_t(int, mtd->oobblock - cnt, vecs->iov_len - len);
996 memcpy(buffer + cnt, vecs->iov_base + len, thislen);
997 cnt += thislen;
998 len += thislen;
999
1000 /* Check, if we have to switch to the next tuple */
1001 if (len >= (int) vecs->iov_len) {
1002 vecs++;
1003 len = 0;
1004 count--;
1005 }
1006 }
1007 }
1008
1009 this->command(mtd, ONENAND_CMD_BUFFERRAM, to, mtd->oobblock);
1010
1011 this->write_bufferram(mtd, ONENAND_DATARAM, pbuf, 0, mtd->oobblock);
1012 this->write_bufferram(mtd, ONENAND_SPARERAM, ffchars, 0, mtd->oobsize);
1013
1014 this->command(mtd, ONENAND_CMD_PROG, to, mtd->oobblock);
1015
1016 onenand_update_bufferram(mtd, to, 1);
1017
1018 ret = this->wait(mtd, FL_WRITING);
1019 if (ret) {
1020 DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: write failed %d\n", ret);
1021 goto out;
1022 }
1023
1024
1025 /* Only check verify write turn on */
1026 ret = onenand_verify_page(mtd, (u_char *) pbuf, to);
1027 if (ret) {
1028 DEBUG(MTD_DEBUG_LEVEL0, "onenand_writev_ecc: verify failed %d\n", ret);
1029 goto out;
1030 }
1031
1032 written += mtd->oobblock;
1033
1034 to += mtd->oobblock;
1035 }
1036
1037out:
1038 /* Deselect and wakt up anyone waiting on the device */
1039 onenand_release_device(mtd);
1040
1041 *retlen = written;
1042
1043 return 0;
1044}
1045
1046/**
1047 * onenand_writev - [MTD Interface] compabilty function for onenand_writev_ecc
1048 * @param mtd MTD device structure
1049 * @param vecs the iovectors to write
1050 * @param count number of vectors
1051 * @param to offset to write to
1052 * @param retlen pointer to variable to store the number of written bytes
1053 *
1054 * OneNAND write with kvec. This just calls the ecc function
1055 */
1056static int onenand_writev(struct mtd_info *mtd, const struct kvec *vecs,
1057 unsigned long count, loff_t to, size_t *retlen)
1058{
1059 return onenand_writev_ecc(mtd, vecs, count, to, retlen, NULL, NULL);
1060}
1061
1062/**
1063 * onenand_block_checkbad - [GENERIC] Check if a block is marked bad
1064 * @param mtd MTD device structure
1065 * @param ofs offset from device start
1066 * @param getchip 0, if the chip is already selected
1067 * @param allowbbt 1, if its allowed to access the bbt area
1068 *
1069 * Check, if the block is bad. Either by reading the bad block table or
1070 * calling of the scan function.
1071 */
1072static int onenand_block_checkbad(struct mtd_info *mtd, loff_t ofs, int getchip, int allowbbt)
1073{
1074 struct onenand_chip *this = mtd->priv;
1075 struct bbm_info *bbm = this->bbm;
1076
1077 /* Return info from the table */
1078 return bbm->isbad_bbt(mtd, ofs, allowbbt);
1079}
1080
1081/**
1082 * onenand_erase - [MTD Interface] erase block(s)
1083 * @param mtd MTD device structure
1084 * @param instr erase instruction
1085 *
1086 * Erase one ore more blocks
1087 */
1088static int onenand_erase(struct mtd_info *mtd, struct erase_info *instr)
1089{
1090 struct onenand_chip *this = mtd->priv;
1091 unsigned int block_size;
1092 loff_t addr;
1093 int len;
1094 int ret = 0;
1095
1096 DEBUG(MTD_DEBUG_LEVEL3, "onenand_erase: start = 0x%08x, len = %i\n", (unsigned int) instr->addr, (unsigned int) instr->len);
1097
1098 block_size = (1 << this->erase_shift);
1099
1100 /* Start address must align on block boundary */
1101 if (unlikely(instr->addr & (block_size - 1))) {
1102 DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Unaligned address\n");
1103 return -EINVAL;
1104 }
1105
1106 /* Length must align on block boundary */
1107 if (unlikely(instr->len & (block_size - 1))) {
1108 DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Length not block aligned\n");
1109 return -EINVAL;
1110 }
1111
1112 /* Do not allow erase past end of device */
1113 if (unlikely((instr->len + instr->addr) > mtd->size)) {
1114 DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Erase past end of device\n");
1115 return -EINVAL;
1116 }
1117
1118 instr->fail_addr = 0xffffffff;
1119
1120 /* Grab the lock and see if the device is available */
1121 onenand_get_device(mtd, FL_ERASING);
1122
1123 /* Loop throught the pages */
1124 len = instr->len;
1125 addr = instr->addr;
1126
1127 instr->state = MTD_ERASING;
1128
1129 while (len) {
1130
1131 /* Check if we have a bad block, we do not erase bad blocks */
1132 if (onenand_block_checkbad(mtd, addr, 0, 0)) {
1133 printk (KERN_WARNING "onenand_erase: attempt to erase a bad block at addr 0x%08x\n", (unsigned int) addr);
1134 instr->state = MTD_ERASE_FAILED;
1135 goto erase_exit;
1136 }
1137
1138 this->command(mtd, ONENAND_CMD_ERASE, addr, block_size);
1139
1140 ret = this->wait(mtd, FL_ERASING);
1141 /* Check, if it is write protected */
1142 if (ret) {
1143 if (ret == -EPERM)
1144 DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Device is write protected!!!\n");
1145 else
1146 DEBUG(MTD_DEBUG_LEVEL0, "onenand_erase: Failed erase, block %d\n", (unsigned) (addr >> this->erase_shift));
1147 instr->state = MTD_ERASE_FAILED;
1148 instr->fail_addr = addr;
1149 goto erase_exit;
1150 }
1151
1152 len -= block_size;
1153 addr += block_size;
1154 }
1155
1156 instr->state = MTD_ERASE_DONE;
1157
1158erase_exit:
1159
1160 ret = instr->state == MTD_ERASE_DONE ? 0 : -EIO;
1161 /* Do call back function */
1162 if (!ret)
1163 mtd_erase_callback(instr);
1164
1165 /* Deselect and wake up anyone waiting on the device */
1166 onenand_release_device(mtd);
1167
1168 return ret;
1169}
1170
1171/**
1172 * onenand_sync - [MTD Interface] sync
1173 * @param mtd MTD device structure
1174 *
1175 * Sync is actually a wait for chip ready function
1176 */
1177static void onenand_sync(struct mtd_info *mtd)
1178{
1179 DEBUG(MTD_DEBUG_LEVEL3, "onenand_sync: called\n");
1180
1181 /* Grab the lock and see if the device is available */
1182 onenand_get_device(mtd, FL_SYNCING);
1183
1184 /* Release it and go back */
1185 onenand_release_device(mtd);
1186}
1187
1188
1189/**
1190 * onenand_block_isbad - [MTD Interface] Check whether the block at the given offset is bad
1191 * @param mtd MTD device structure
1192 * @param ofs offset relative to mtd start
1193 *
1194 * Check whether the block is bad
1195 */
1196static int onenand_block_isbad(struct mtd_info *mtd, loff_t ofs)
1197{
1198 /* Check for invalid offset */
1199 if (ofs > mtd->size)
1200 return -EINVAL;
1201
1202 return onenand_block_checkbad(mtd, ofs, 1, 0);
1203}
1204
1205/**
1206 * onenand_default_block_markbad - [DEFAULT] mark a block bad
1207 * @param mtd MTD device structure
1208 * @param ofs offset from device start
1209 *
1210 * This is the default implementation, which can be overridden by
1211 * a hardware specific driver.
1212 */
1213static int onenand_default_block_markbad(struct mtd_info *mtd, loff_t ofs)
1214{
1215 struct onenand_chip *this = mtd->priv;
1216 struct bbm_info *bbm = this->bbm;
1217 u_char buf[2] = {0, 0};
1218 size_t retlen;
1219 int block;
1220
1221 /* Get block number */
1222 block = ((int) ofs) >> bbm->bbt_erase_shift;
1223 if (bbm->bbt)
1224 bbm->bbt[block >> 2] |= 0x01 << ((block & 0x03) << 1);
1225
1226 /* We write two bytes, so we dont have to mess with 16 bit access */
1227 ofs += mtd->oobsize + (bbm->badblockpos & ~0x01);
1228 return mtd->write_oob(mtd, ofs , 2, &retlen, buf);
1229}
1230
1231/**
1232 * onenand_block_markbad - [MTD Interface] Mark the block at the given offset as bad
1233 * @param mtd MTD device structure
1234 * @param ofs offset relative to mtd start
1235 *
1236 * Mark the block as bad
1237 */
1238static int onenand_block_markbad(struct mtd_info *mtd, loff_t ofs)
1239{
1240 struct onenand_chip *this = mtd->priv;
1241 int ret;
1242
1243 ret = onenand_block_isbad(mtd, ofs);
1244 if (ret) {
1245 /* If it was bad already, return success and do nothing */
1246 if (ret > 0)
1247 return 0;
1248 return ret;
1249 }
1250
1251 return this->block_markbad(mtd, ofs);
1252}
1253
1254/**
1255 * onenand_unlock - [MTD Interface] Unlock block(s)
1256 * @param mtd MTD device structure
1257 * @param ofs offset relative to mtd start
1258 * @param len number of bytes to unlock
1259 *
1260 * Unlock one or more blocks
1261 */
1262static int onenand_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
1263{
1264 struct onenand_chip *this = mtd->priv;
1265 int start, end, block, value, status;
1266
1267 start = ofs >> this->erase_shift;
1268 end = len >> this->erase_shift;
1269
1270 /* Continuous lock scheme */
1271 if (this->options & ONENAND_CONT_LOCK) {
1272 /* Set start block address */
1273 this->write_word(start, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1274 /* Set end block address */
1275 this->write_word(end - 1, this->base + ONENAND_REG_END_BLOCK_ADDRESS);
1276 /* Write unlock command */
1277 this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
1278
1279 /* There's no return value */
1280 this->wait(mtd, FL_UNLOCKING);
1281
1282 /* Sanity check */
1283 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1284 & ONENAND_CTRL_ONGO)
1285 continue;
1286
1287 /* Check lock status */
1288 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1289 if (!(status & ONENAND_WP_US))
1290 printk(KERN_ERR "wp status = 0x%x\n", status);
1291
1292 return 0;
1293 }
1294
1295 /* Block lock scheme */
1296 for (block = start; block < end; block++) {
1297 /* Set start block address */
1298 this->write_word(block, this->base + ONENAND_REG_START_BLOCK_ADDRESS);
1299 /* Write unlock command */
1300 this->command(mtd, ONENAND_CMD_UNLOCK, 0, 0);
1301
1302 /* There's no return value */
1303 this->wait(mtd, FL_UNLOCKING);
1304
1305 /* Sanity check */
1306 while (this->read_word(this->base + ONENAND_REG_CTRL_STATUS)
1307 & ONENAND_CTRL_ONGO)
1308 continue;
1309
1310 /* Set block address for read block status */
1311 value = onenand_block_address(this, block);
1312 this->write_word(value, this->base + ONENAND_REG_START_ADDRESS1);
1313
1314 /* Check lock status */
1315 status = this->read_word(this->base + ONENAND_REG_WP_STATUS);
1316 if (!(status & ONENAND_WP_US))
1317 printk(KERN_ERR "block = %d, wp status = 0x%x\n", block, status);
1318 }
1319
1320 return 0;
1321}
1322
1323/**
1324 * onenand_print_device_info - Print device ID
1325 * @param device device ID
1326 *
1327 * Print device ID
1328 */
1329static void onenand_print_device_info(int device)
1330{
1331 int vcc, demuxed, ddp, density;
1332
1333 vcc = device & ONENAND_DEVICE_VCC_MASK;
1334 demuxed = device & ONENAND_DEVICE_IS_DEMUX;
1335 ddp = device & ONENAND_DEVICE_IS_DDP;
1336 density = device >> ONENAND_DEVICE_DENSITY_SHIFT;
1337 printk(KERN_INFO "%sOneNAND%s %dMB %sV 16-bit (0x%02x)\n",
1338 demuxed ? "" : "Muxed ",
1339 ddp ? "(DDP)" : "",
1340 (16 << density),
1341 vcc ? "2.65/3.3" : "1.8",
1342 device);
1343}
1344
1345static const struct onenand_manufacturers onenand_manuf_ids[] = {
1346 {ONENAND_MFR_SAMSUNG, "Samsung"},
1347 {ONENAND_MFR_UNKNOWN, "Unknown"}
1348};
1349
1350/**
1351 * onenand_check_maf - Check manufacturer ID
1352 * @param manuf manufacturer ID
1353 *
1354 * Check manufacturer ID
1355 */
1356static int onenand_check_maf(int manuf)
1357{
1358 int i;
1359
1360 for (i = 0; onenand_manuf_ids[i].id; i++) {
1361 if (manuf == onenand_manuf_ids[i].id)
1362 break;
1363 }
1364
1365 printk(KERN_DEBUG "OneNAND Manufacturer: %s (0x%0x)\n",
1366 onenand_manuf_ids[i].name, manuf);
1367
1368 return (i != ONENAND_MFR_UNKNOWN);
1369}
1370
1371/**
1372 * onenand_probe - [OneNAND Interface] Probe the OneNAND device
1373 * @param mtd MTD device structure
1374 *
1375 * OneNAND detection method:
1376 * Compare the the values from command with ones from register
1377 */
1378static int onenand_probe(struct mtd_info *mtd)
1379{
1380 struct onenand_chip *this = mtd->priv;
1381 int bram_maf_id, bram_dev_id, maf_id, dev_id;
1382 int version_id;
1383 int density;
1384
1385 /* Send the command for reading device ID from BootRAM */
1386 this->write_word(ONENAND_CMD_READID, this->base + ONENAND_BOOTRAM);
1387
1388 /* Read manufacturer and device IDs from BootRAM */
1389 bram_maf_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x0);
1390 bram_dev_id = this->read_word(this->base + ONENAND_BOOTRAM + 0x2);
1391
1392 /* Check manufacturer ID */
1393 if (onenand_check_maf(bram_maf_id))
1394 return -ENXIO;
1395
1396 /* Reset OneNAND to read default register values */
1397 this->write_word(ONENAND_CMD_RESET, this->base + ONENAND_BOOTRAM);
1398
1399 /* Read manufacturer and device IDs from Register */
1400 maf_id = this->read_word(this->base + ONENAND_REG_MANUFACTURER_ID);
1401 dev_id = this->read_word(this->base + ONENAND_REG_DEVICE_ID);
1402
1403 /* Check OneNAND device */
1404 if (maf_id != bram_maf_id || dev_id != bram_dev_id)
1405 return -ENXIO;
1406
1407 /* Flash device information */
1408 onenand_print_device_info(dev_id);
1409 this->device_id = dev_id;
1410
1411 density = dev_id >> ONENAND_DEVICE_DENSITY_SHIFT;
1412 this->chipsize = (16 << density) << 20;
1413 /* Set density mask. it is used for DDP */
1414 this->density_mask = (1 << (density + 6));
1415
1416 /* OneNAND page size & block size */
1417 /* The data buffer size is equal to page size */
1418 mtd->oobblock = this->read_word(this->base + ONENAND_REG_DATA_BUFFER_SIZE);
1419 mtd->oobsize = mtd->oobblock >> 5;
1420 /* Pagers per block is always 64 in OneNAND */
1421 mtd->erasesize = mtd->oobblock << 6;
1422
1423 this->erase_shift = ffs(mtd->erasesize) - 1;
1424 this->page_shift = ffs(mtd->oobblock) - 1;
1425 this->ppb_shift = (this->erase_shift - this->page_shift);
1426 this->page_mask = (mtd->erasesize / mtd->oobblock) - 1;
1427
1428 /* REVIST: Multichip handling */
1429
1430 mtd->size = this->chipsize;
1431
1432 /* Version ID */
1433 version_id = this->read_word(this->base + ONENAND_REG_VERSION_ID);
1434 printk(KERN_DEBUG "OneNAND version = 0x%04x\n", version_id);
1435
1436 /* Lock scheme */
1437 if (density <= ONENAND_DEVICE_DENSITY_512Mb &&
1438 !(version_id >> ONENAND_VERSION_PROCESS_SHIFT)) {
1439 printk(KERN_INFO "Lock scheme is Continues Lock\n");
1440 this->options |= ONENAND_CONT_LOCK;
1441 }
1442
1443 return 0;
1444}
1445
1446/**
1447 * onenand_suspend - [MTD Interface] Suspend the OneNAND flash
1448 * @param mtd MTD device structure
1449 */
1450static int onenand_suspend(struct mtd_info *mtd)
1451{
1452 return onenand_get_device(mtd, FL_PM_SUSPENDED);
1453}
1454
1455/**
1456 * onenand_resume - [MTD Interface] Resume the OneNAND flash
1457 * @param mtd MTD device structure
1458 */
1459static void onenand_resume(struct mtd_info *mtd)
1460{
1461 struct onenand_chip *this = mtd->priv;
1462
1463 if (this->state == FL_PM_SUSPENDED)
1464 onenand_release_device(mtd);
1465 else
1466 printk(KERN_ERR "resume() called for the chip which is not"
1467 "in suspended state\n");
1468}
1469
1470
1471/**
1472 * onenand_scan - [OneNAND Interface] Scan for the OneNAND device
1473 * @param mtd MTD device structure
1474 * @param maxchips Number of chips to scan for
1475 *
1476 * This fills out all the not initialized function pointers
1477 * with the defaults.
1478 * The flash ID is read and the mtd/chip structures are
1479 * filled with the appropriate values.
1480 */
1481int onenand_scan(struct mtd_info *mtd, int maxchips)
1482{
1483 struct onenand_chip *this = mtd->priv;
1484
1485 if (!this->read_word)
1486 this->read_word = onenand_readw;
1487 if (!this->write_word)
1488 this->write_word = onenand_writew;
1489
1490 if (!this->command)
1491 this->command = onenand_command;
1492 if (!this->wait)
1493 this->wait = onenand_wait;
1494
1495 if (!this->read_bufferram)
1496 this->read_bufferram = onenand_read_bufferram;
1497 if (!this->write_bufferram)
1498 this->write_bufferram = onenand_write_bufferram;
1499
1500 if (!this->block_markbad)
1501 this->block_markbad = onenand_default_block_markbad;
1502 if (!this->scan_bbt)
1503 this->scan_bbt = onenand_default_bbt;
1504
1505 if (onenand_probe(mtd))
1506 return -ENXIO;
1507
1508 /* Set Sync. Burst Read after probing */
1509 if (this->mmcontrol) {
1510 printk(KERN_INFO "OneNAND Sync. Burst Read support\n");
1511 this->read_bufferram = onenand_sync_read_bufferram;
1512 }
1513
1514 this->state = FL_READY;
1515 init_waitqueue_head(&this->wq);
1516 spin_lock_init(&this->chip_lock);
1517
1518 switch (mtd->oobsize) {
1519 case 64:
1520 this->autooob = &onenand_oob_64;
1521 break;
1522
1523 case 32:
1524 this->autooob = &onenand_oob_32;
1525 break;
1526
1527 default:
1528 printk(KERN_WARNING "No OOB scheme defined for oobsize %d\n",
1529 mtd->oobsize);
1530 /* To prevent kernel oops */
1531 this->autooob = &onenand_oob_32;
1532 break;
1533 }
1534
1535 memcpy(&mtd->oobinfo, this->autooob, sizeof(mtd->oobinfo));
1536
1537 /* Fill in remaining MTD driver data */
1538 mtd->type = MTD_NANDFLASH;
1539 mtd->flags = MTD_CAP_NANDFLASH | MTD_ECC;
1540 mtd->ecctype = MTD_ECC_SW;
1541 mtd->erase = onenand_erase;
1542 mtd->point = NULL;
1543 mtd->unpoint = NULL;
1544 mtd->read = onenand_read;
1545 mtd->write = onenand_write;
1546 mtd->read_ecc = onenand_read_ecc;
1547 mtd->write_ecc = onenand_write_ecc;
1548 mtd->read_oob = onenand_read_oob;
1549 mtd->write_oob = onenand_write_oob;
1550 mtd->readv = NULL;
1551 mtd->readv_ecc = NULL;
1552 mtd->writev = onenand_writev;
1553 mtd->writev_ecc = onenand_writev_ecc;
1554 mtd->sync = onenand_sync;
1555 mtd->lock = NULL;
1556 mtd->unlock = onenand_unlock;
1557 mtd->suspend = onenand_suspend;
1558 mtd->resume = onenand_resume;
1559 mtd->block_isbad = onenand_block_isbad;
1560 mtd->block_markbad = onenand_block_markbad;
1561 mtd->owner = THIS_MODULE;
1562
1563 /* Unlock whole block */
1564 mtd->unlock(mtd, 0x0, this->chipsize);
1565
1566 return this->scan_bbt(mtd);
1567}
1568
1569/**
1570 * onenand_release - [OneNAND Interface] Free resources held by the OneNAND device
1571 * @param mtd MTD device structure
1572 */
1573void onenand_release(struct mtd_info *mtd)
1574{
1575#ifdef CONFIG_MTD_PARTITIONS
1576 /* Deregister partitions */
1577 del_mtd_partitions (mtd);
1578#endif
1579 /* Deregister the device */
1580 del_mtd_device (mtd);
1581}
1582
1583EXPORT_SYMBOL_GPL(onenand_scan);
1584EXPORT_SYMBOL_GPL(onenand_release);
1585
1586MODULE_LICENSE("GPL");
1587MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>");
1588MODULE_DESCRIPTION("Generic OneNAND flash driver code");
diff --git a/drivers/mtd/onenand/onenand_bbt.c b/drivers/mtd/onenand/onenand_bbt.c
new file mode 100644
index 000000000000..f40190f499e1
--- /dev/null
+++ b/drivers/mtd/onenand/onenand_bbt.c
@@ -0,0 +1,246 @@
1/*
2 * linux/drivers/mtd/onenand/onenand_bbt.c
3 *
4 * Bad Block Table support for the OneNAND driver
5 *
6 * Copyright(c) 2005 Samsung Electronics
7 * Kyungmin Park <kyungmin.park@samsung.com>
8 *
9 * Derived from nand_bbt.c
10 *
11 * TODO:
12 * Split BBT core and chip specific BBT.
13 */
14
15#include <linux/slab.h>
16#include <linux/mtd/mtd.h>
17#include <linux/mtd/onenand.h>
18#include <linux/mtd/compatmac.h>
19
20/**
21 * check_short_pattern - [GENERIC] check if a pattern is in the buffer
22 * @param buf the buffer to search
23 * @param len the length of buffer to search
24 * @param paglen the pagelength
25 * @param td search pattern descriptor
26 *
27 * Check for a pattern at the given place. Used to search bad block
28 * tables and good / bad block identifiers. Same as check_pattern, but
29 * no optional empty check and the pattern is expected to start
30 * at offset 0.
31 *
32 */
33static int check_short_pattern(uint8_t *buf, int len, int paglen, struct nand_bbt_descr *td)
34{
35 int i;
36 uint8_t *p = buf;
37
38 /* Compare the pattern */
39 for (i = 0; i < td->len; i++) {
40 if (p[i] != td->pattern[i])
41 return -1;
42 }
43 return 0;
44}
45
46/**
47 * create_bbt - [GENERIC] Create a bad block table by scanning the device
48 * @param mtd MTD device structure
49 * @param buf temporary buffer
50 * @param bd descriptor for the good/bad block search pattern
51 * @param chip create the table for a specific chip, -1 read all chips.
52 * Applies only if NAND_BBT_PERCHIP option is set
53 *
54 * Create a bad block table by scanning the device
55 * for the given good/bad block identify pattern
56 */
57static int create_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *bd, int chip)
58{
59 struct onenand_chip *this = mtd->priv;
60 struct bbm_info *bbm = this->bbm;
61 int i, j, numblocks, len, scanlen;
62 int startblock;
63 loff_t from;
64 size_t readlen, ooblen;
65
66 printk(KERN_INFO "Scanning device for bad blocks\n");
67
68 len = 1;
69
70 /* We need only read few bytes from the OOB area */
71 scanlen = ooblen = 0;
72 readlen = bd->len;
73
74 /* chip == -1 case only */
75 /* Note that numblocks is 2 * (real numblocks) here;
76 * see i += 2 below as it makses shifting and masking less painful
77 */
78 numblocks = mtd->size >> (bbm->bbt_erase_shift - 1);
79 startblock = 0;
80 from = 0;
81
82 for (i = startblock; i < numblocks; ) {
83 int ret;
84
85 for (j = 0; j < len; j++) {
86 size_t retlen;
87
88 /* No need to read pages fully,
89 * just read required OOB bytes */
90 ret = mtd->read_oob(mtd, from + j * mtd->oobblock + bd->offs,
91 readlen, &retlen, &buf[0]);
92
93 if (ret)
94 return ret;
95
96 if (check_short_pattern(&buf[j * scanlen], scanlen, mtd->oobblock, bd)) {
97 bbm->bbt[i >> 3] |= 0x03 << (i & 0x6);
98 printk(KERN_WARNING "Bad eraseblock %d at 0x%08x\n",
99 i >> 1, (unsigned int) from);
100 break;
101 }
102 }
103 i += 2;
104 from += (1 << bbm->bbt_erase_shift);
105 }
106
107 return 0;
108}
109
110
111/**
112 * onenand_memory_bbt - [GENERIC] create a memory based bad block table
113 * @param mtd MTD device structure
114 * @param bd descriptor for the good/bad block search pattern
115 *
116 * The function creates a memory based bbt by scanning the device
117 * for manufacturer / software marked good / bad blocks
118 */
119static inline int onenand_memory_bbt (struct mtd_info *mtd, struct nand_bbt_descr *bd)
120{
121 unsigned char data_buf[MAX_ONENAND_PAGESIZE];
122
123 bd->options &= ~NAND_BBT_SCANEMPTY;
124 return create_bbt(mtd, data_buf, bd, -1);
125}
126
127/**
128 * onenand_isbad_bbt - [OneNAND Interface] Check if a block is bad
129 * @param mtd MTD device structure
130 * @param offs offset in the device
131 * @param allowbbt allow access to bad block table region
132 */
133static int onenand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
134{
135 struct onenand_chip *this = mtd->priv;
136 struct bbm_info *bbm = this->bbm;
137 int block;
138 uint8_t res;
139
140 /* Get block number * 2 */
141 block = (int) (offs >> (bbm->bbt_erase_shift - 1));
142 res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;
143
144 DEBUG(MTD_DEBUG_LEVEL2, "onenand_isbad_bbt: bbt info for offs 0x%08x: (block %d) 0x%02x\n",
145 (unsigned int) offs, block >> 1, res);
146
147 switch ((int) res) {
148 case 0x00: return 0;
149 case 0x01: return 1;
150 case 0x02: return allowbbt ? 0 : 1;
151 }
152
153 return 1;
154}
155
156/**
157 * onenand_scan_bbt - [OneNAND Interface] scan, find, read and maybe create bad block table(s)
158 * @param mtd MTD device structure
159 * @param bd descriptor for the good/bad block search pattern
160 *
161 * The function checks, if a bad block table(s) is/are already
162 * available. If not it scans the device for manufacturer
163 * marked good / bad blocks and writes the bad block table(s) to
164 * the selected place.
165 *
166 * The bad block table memory is allocated here. It must be freed
167 * by calling the onenand_free_bbt function.
168 *
169 */
170int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
171{
172 struct onenand_chip *this = mtd->priv;
173 struct bbm_info *bbm = this->bbm;
174 int len, ret = 0;
175
176 len = mtd->size >> (this->erase_shift + 2);
177 /* Allocate memory (2bit per block) */
178 bbm->bbt = kmalloc(len, GFP_KERNEL);
179 if (!bbm->bbt) {
180 printk(KERN_ERR "onenand_scan_bbt: Out of memory\n");
181 return -ENOMEM;
182 }
183 /* Clear the memory bad block table */
184 memset(bbm->bbt, 0x00, len);
185
186 /* Set the bad block position */
187 bbm->badblockpos = ONENAND_BADBLOCK_POS;
188
189 /* Set erase shift */
190 bbm->bbt_erase_shift = this->erase_shift;
191
192 if (!bbm->isbad_bbt)
193 bbm->isbad_bbt = onenand_isbad_bbt;
194
195 /* Scan the device to build a memory based bad block table */
196 if ((ret = onenand_memory_bbt(mtd, bd))) {
197 printk(KERN_ERR "onenand_scan_bbt: Can't scan flash and build the RAM-based BBT\n");
198 kfree(bbm->bbt);
199 bbm->bbt = NULL;
200 }
201
202 return ret;
203}
204
205/*
206 * Define some generic bad / good block scan pattern which are used
207 * while scanning a device for factory marked good / bad blocks.
208 */
209static uint8_t scan_ff_pattern[] = { 0xff, 0xff };
210
211static struct nand_bbt_descr largepage_memorybased = {
212 .options = 0,
213 .offs = 0,
214 .len = 2,
215 .pattern = scan_ff_pattern,
216};
217
218/**
219 * onenand_default_bbt - [OneNAND Interface] Select a default bad block table for the device
220 * @param mtd MTD device structure
221 *
222 * This function selects the default bad block table
223 * support for the device and calls the onenand_scan_bbt function
224 */
225int onenand_default_bbt(struct mtd_info *mtd)
226{
227 struct onenand_chip *this = mtd->priv;
228 struct bbm_info *bbm;
229
230 this->bbm = kmalloc(sizeof(struct bbm_info), GFP_KERNEL);
231 if (!this->bbm)
232 return -ENOMEM;
233
234 bbm = this->bbm;
235
236 memset(bbm, 0, sizeof(struct bbm_info));
237
238 /* 1KB page has same configuration as 2KB page */
239 if (!bbm->badblock_pattern)
240 bbm->badblock_pattern = &largepage_memorybased;
241
242 return onenand_scan_bbt(mtd, bbm->badblock_pattern);
243}
244
245EXPORT_SYMBOL(onenand_scan_bbt);
246EXPORT_SYMBOL(onenand_default_bbt);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 02:17:44 -0500