2 * Common Flash Interface support:
3 * AMD & Fujitsu Standard Vendor Command Set (ID 0x0002)
5 * Copyright (C) 2000 Crossnet Co. <info@crossnet.co.jp>
6 * Copyright (C) 2004 Arcom Control Systems Ltd <linux@arcom.com>
7 * Copyright (C) 2005 MontaVista Software Inc. <source@mvista.com>
9 * 2_by_8 routines added by Simon Munton
11 * 4_by_16 work by Carolyn J. Smith
13 * XIP support hooks by Vitaly Wool (based on code for Intel flash
16 * Occasionally maintained by Thayne Harbaugh tharbaugh at lnxi dot com
20 * $Id: cfi_cmdset_0002.c,v 1.122 2005/11/07 11:14:22 gleixner Exp $
24 #include <linux/module.h>
25 #include <linux/types.h>
26 #include <linux/kernel.h>
27 #include <linux/sched.h>
28 #include <linux/init.h>
30 #include <asm/byteorder.h>
32 #include <linux/errno.h>
33 #include <linux/slab.h>
34 #include <linux/delay.h>
35 #include <linux/interrupt.h>
36 #include <linux/mtd/compatmac.h>
37 #include <linux/mtd/map.h>
38 #include <linux/mtd/mtd.h>
39 #include <linux/mtd/cfi.h>
40 #include <linux/mtd/xip.h>
42 #define AMD_BOOTLOC_BUG
43 #define FORCE_WORD_WRITE 0
45 #define MAX_WORD_RETRIES 3
47 #define MANUFACTURER_AMD 0x0001
48 #define MANUFACTURER_ATMEL 0x001F
49 #define MANUFACTURER_SST 0x00BF
50 #define SST49LF004B 0x0060
51 #define SST49LF040B 0x0050
52 #define SST49LF008A 0x005a
53 #define AT49BV6416 0x00d6
55 static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
56 static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
57 static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
58 static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *);
59 static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *);
60 static void cfi_amdstd_sync (struct mtd_info *);
61 static int cfi_amdstd_suspend (struct mtd_info *);
62 static void cfi_amdstd_resume (struct mtd_info *);
63 static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
65 static void cfi_amdstd_destroy(struct mtd_info *);
67 struct mtd_info *cfi_cmdset_0002(struct map_info *, int);
68 static struct mtd_info *cfi_amdstd_setup (struct mtd_info *);
70 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
71 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
74 static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
75 static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_t len);
77 static struct mtd_chip_driver cfi_amdstd_chipdrv = {
78 .probe = NULL, /* Not usable directly */
79 .destroy = cfi_amdstd_destroy,
80 .name = "cfi_cmdset_0002",
85 /* #define DEBUG_CFI_FEATURES */
88 #ifdef DEBUG_CFI_FEATURES
89 static void cfi_tell_features(struct cfi_pri_amdstd *extp)
91 const char* erase_suspend[3] = {
92 "Not supported", "Read only", "Read/write"
94 const char* top_bottom[6] = {
95 "No WP", "8x8KiB sectors at top & bottom, no WP",
96 "Bottom boot", "Top boot",
97 "Uniform, Bottom WP", "Uniform, Top WP"
100 printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1);
101 printk(" Address sensitive unlock: %s\n",
102 (extp->SiliconRevision & 1) ? "Not required" : "Required");
104 if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend))
105 printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]);
107 printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend);
109 if (extp->BlkProt == 0)
110 printk(" Block protection: Not supported\n");
112 printk(" Block protection: %d sectors per group\n", extp->BlkProt);
115 printk(" Temporary block unprotect: %s\n",
116 extp->TmpBlkUnprotect ? "Supported" : "Not supported");
117 printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot);
118 printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps);
119 printk(" Burst mode: %s\n",
120 extp->BurstMode ? "Supported" : "Not supported");
121 if (extp->PageMode == 0)
122 printk(" Page mode: Not supported\n");
124 printk(" Page mode: %d word page\n", extp->PageMode << 2);
126 printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n",
127 extp->VppMin >> 4, extp->VppMin & 0xf);
128 printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n",
129 extp->VppMax >> 4, extp->VppMax & 0xf);
131 if (extp->TopBottom < ARRAY_SIZE(top_bottom))
132 printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]);
134 printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom);
138 #ifdef AMD_BOOTLOC_BUG
139 /* Wheee. Bring me the head of someone at AMD. */
140 static void fixup_amd_bootblock(struct mtd_info *mtd, void* param)
142 struct map_info *map = mtd->priv;
143 struct cfi_private *cfi = map->fldrv_priv;
144 struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
145 __u8 major = extp->MajorVersion;
146 __u8 minor = extp->MinorVersion;
148 if (((major << 8) | minor) < 0x3131) {
149 /* CFI version 1.0 => don't trust bootloc */
150 if (cfi->id & 0x80) {
151 printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id);
152 extp->TopBottom = 3; /* top boot */
154 extp->TopBottom = 2; /* bottom boot */
160 static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
162 struct map_info *map = mtd->priv;
163 struct cfi_private *cfi = map->fldrv_priv;
164 if (cfi->cfiq->BufWriteTimeoutTyp) {
165 DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" );
166 mtd->write = cfi_amdstd_write_buffers;
170 /* Atmel chips don't use the same PRI format as AMD chips */
171 static void fixup_convert_atmel_pri(struct mtd_info *mtd, void *param)
173 struct map_info *map = mtd->priv;
174 struct cfi_private *cfi = map->fldrv_priv;
175 struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
176 struct cfi_pri_atmel atmel_pri;
178 memcpy(&atmel_pri, extp, sizeof(atmel_pri));
179 memset((char *)extp + 5, 0, sizeof(*extp) - 5);
181 if (atmel_pri.Features & 0x02)
182 extp->EraseSuspend = 2;
184 if (atmel_pri.BottomBoot)
189 /* burst write mode not supported */
190 cfi->cfiq->BufWriteTimeoutTyp = 0;
191 cfi->cfiq->BufWriteTimeoutMax = 0;
194 static void fixup_use_secsi(struct mtd_info *mtd, void *param)
196 /* Setup for chips with a secsi area */
197 mtd->read_user_prot_reg = cfi_amdstd_secsi_read;
198 mtd->read_fact_prot_reg = cfi_amdstd_secsi_read;
201 static void fixup_use_erase_chip(struct mtd_info *mtd, void *param)
203 struct map_info *map = mtd->priv;
204 struct cfi_private *cfi = map->fldrv_priv;
205 if ((cfi->cfiq->NumEraseRegions == 1) &&
206 ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) {
207 mtd->erase = cfi_amdstd_erase_chip;
213 * Some Atmel chips (e.g. the AT49BV6416) power-up with all sectors
216 static void fixup_use_atmel_lock(struct mtd_info *mtd, void *param)
218 mtd->lock = cfi_atmel_lock;
219 mtd->unlock = cfi_atmel_unlock;
220 mtd->flags |= MTD_POWERUP_LOCK;
223 static struct cfi_fixup cfi_fixup_table[] = {
224 { CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
225 #ifdef AMD_BOOTLOC_BUG
226 { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
228 { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, },
229 { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, },
230 { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, },
231 { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, },
232 { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, },
233 { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, },
234 #if !FORCE_WORD_WRITE
235 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
239 static struct cfi_fixup jedec_fixup_table[] = {
240 { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, },
241 { MANUFACTURER_SST, SST49LF040B, fixup_use_fwh_lock, NULL, },
242 { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, },
246 static struct cfi_fixup fixup_table[] = {
247 /* The CFI vendor ids and the JEDEC vendor IDs appear
248 * to be common. It is like the devices id's are as
249 * well. This table is to pick all cases where
250 * we know that is the case.
252 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL },
253 { CFI_MFR_ATMEL, AT49BV6416, fixup_use_atmel_lock, NULL },
258 struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
260 struct cfi_private *cfi = map->fldrv_priv;
261 struct mtd_info *mtd;
264 mtd = kzalloc(sizeof(*mtd), GFP_KERNEL);
266 printk(KERN_WARNING "Failed to allocate memory for MTD device\n");
270 mtd->type = MTD_NORFLASH;
272 /* Fill in the default mtd operations */
273 mtd->erase = cfi_amdstd_erase_varsize;
274 mtd->write = cfi_amdstd_write_words;
275 mtd->read = cfi_amdstd_read;
276 mtd->sync = cfi_amdstd_sync;
277 mtd->suspend = cfi_amdstd_suspend;
278 mtd->resume = cfi_amdstd_resume;
279 mtd->flags = MTD_CAP_NORFLASH;
280 mtd->name = map->name;
283 if (cfi->cfi_mode==CFI_MODE_CFI){
284 unsigned char bootloc;
286 * It's a real CFI chip, not one for which the probe
287 * routine faked a CFI structure. So we read the feature
290 __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
291 struct cfi_pri_amdstd *extp;
293 extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu");
299 if (extp->MajorVersion != '1' ||
300 (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
301 printk(KERN_ERR " Unknown Amd/Fujitsu Extended Query "
302 "version %c.%c.\n", extp->MajorVersion,
309 /* Install our own private info structure */
310 cfi->cmdset_priv = extp;
312 /* Apply cfi device specific fixups */
313 cfi_fixup(mtd, cfi_fixup_table);
315 #ifdef DEBUG_CFI_FEATURES
316 /* Tell the user about it in lots of lovely detail */
317 cfi_tell_features(extp);
320 bootloc = extp->TopBottom;
321 if ((bootloc != 2) && (bootloc != 3)) {
322 printk(KERN_WARNING "%s: CFI does not contain boot "
323 "bank location. Assuming top.\n", map->name);
327 if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) {
328 printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name);
330 for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) {
331 int j = (cfi->cfiq->NumEraseRegions-1)-i;
334 swap = cfi->cfiq->EraseRegionInfo[i];
335 cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j];
336 cfi->cfiq->EraseRegionInfo[j] = swap;
339 /* Set the default CFI lock/unlock addresses */
340 cfi->addr_unlock1 = 0x555;
341 cfi->addr_unlock2 = 0x2aa;
342 /* Modify the unlock address if we are in compatibility mode */
343 if ( /* x16 in x8 mode */
344 ((cfi->device_type == CFI_DEVICETYPE_X8) &&
345 (cfi->cfiq->InterfaceDesc ==
346 CFI_INTERFACE_X8_BY_X16_ASYNC)) ||
347 /* x32 in x16 mode */
348 ((cfi->device_type == CFI_DEVICETYPE_X16) &&
349 (cfi->cfiq->InterfaceDesc ==
350 CFI_INTERFACE_X16_BY_X32_ASYNC)))
352 cfi->addr_unlock1 = 0xaaa;
353 cfi->addr_unlock2 = 0x555;
357 else if (cfi->cfi_mode == CFI_MODE_JEDEC) {
358 /* Apply jedec specific fixups */
359 cfi_fixup(mtd, jedec_fixup_table);
361 /* Apply generic fixups */
362 cfi_fixup(mtd, fixup_table);
364 for (i=0; i< cfi->numchips; i++) {
365 cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp;
366 cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
367 cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
368 cfi->chips[i].ref_point_counter = 0;
369 init_waitqueue_head(&(cfi->chips[i].wq));
372 map->fldrv = &cfi_amdstd_chipdrv;
374 return cfi_amdstd_setup(mtd);
376 EXPORT_SYMBOL_GPL(cfi_cmdset_0002);
378 static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
380 struct map_info *map = mtd->priv;
381 struct cfi_private *cfi = map->fldrv_priv;
382 unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
383 unsigned long offset = 0;
386 printk(KERN_NOTICE "number of %s chips: %d\n",
387 (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips);
388 /* Select the correct geometry setup */
389 mtd->size = devsize * cfi->numchips;
391 mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
392 mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
393 * mtd->numeraseregions, GFP_KERNEL);
394 if (!mtd->eraseregions) {
395 printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n");
399 for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
400 unsigned long ernum, ersize;
401 ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
402 ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
404 if (mtd->erasesize < ersize) {
405 mtd->erasesize = ersize;
407 for (j=0; j<cfi->numchips; j++) {
408 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset;
409 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize;
410 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum;
412 offset += (ersize * ernum);
414 if (offset != devsize) {
416 printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize);
421 for (i=0; i<mtd->numeraseregions;i++){
422 printk("%d: offset=0x%x,size=0x%x,blocks=%d\n",
423 i,mtd->eraseregions[i].offset,
424 mtd->eraseregions[i].erasesize,
425 mtd->eraseregions[i].numblocks);
429 /* FIXME: erase-suspend-program is broken. See
430 http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */
431 printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n");
433 __module_get(THIS_MODULE);
438 kfree(mtd->eraseregions);
441 kfree(cfi->cmdset_priv);
447 * Return true if the chip is ready.
449 * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
450 * non-suspended sector) and is indicated by no toggle bits toggling.
452 * Note that anything more complicated than checking if no bits are toggling
453 * (including checking DQ5 for an error status) is tricky to get working
454 * correctly and is therefore not done (particulary with interleaved chips
455 * as each chip must be checked independantly of the others).
457 static int __xipram chip_ready(struct map_info *map, unsigned long addr)
461 d = map_read(map, addr);
462 t = map_read(map, addr);
464 return map_word_equal(map, d, t);
468 * Return true if the chip is ready and has the correct value.
470 * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
471 * non-suspended sector) and it is indicated by no bits toggling.
473 * Error are indicated by toggling bits or bits held with the wrong value,
474 * or with bits toggling.
476 * Note that anything more complicated than checking if no bits are toggling
477 * (including checking DQ5 for an error status) is tricky to get working
478 * correctly and is therefore not done (particulary with interleaved chips
479 * as each chip must be checked independantly of the others).
482 static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected)
486 oldd = map_read(map, addr);
487 curd = map_read(map, addr);
489 return map_word_equal(map, oldd, curd) &&
490 map_word_equal(map, curd, expected);
493 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
495 DECLARE_WAITQUEUE(wait, current);
496 struct cfi_private *cfi = map->fldrv_priv;
498 struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv;
501 timeo = jiffies + HZ;
503 switch (chip->state) {
507 if (chip_ready(map, adr))
510 if (time_after(jiffies, timeo)) {
511 printk(KERN_ERR "Waiting for chip to be ready timed out.\n");
512 spin_unlock(chip->mutex);
515 spin_unlock(chip->mutex);
517 spin_lock(chip->mutex);
518 /* Someone else might have been playing with it. */
528 if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */
531 if (!( mode == FL_READY
534 || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))
535 || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1)
539 /* We could check to see if we're trying to access the sector
540 * that is currently being erased. However, no user will try
541 * anything like that so we just wait for the timeout. */
544 /* It's harmless to issue the Erase-Suspend and Erase-Resume
545 * commands when the erase algorithm isn't in progress. */
546 map_write(map, CMD(0xB0), chip->in_progress_block_addr);
547 chip->oldstate = FL_ERASING;
548 chip->state = FL_ERASE_SUSPENDING;
549 chip->erase_suspended = 1;
551 if (chip_ready(map, adr))
554 if (time_after(jiffies, timeo)) {
555 /* Should have suspended the erase by now.
556 * Send an Erase-Resume command as either
557 * there was an error (so leave the erase
558 * routine to recover from it) or we trying to
559 * use the erase-in-progress sector. */
560 map_write(map, CMD(0x30), chip->in_progress_block_addr);
561 chip->state = FL_ERASING;
562 chip->oldstate = FL_READY;
563 printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__);
567 spin_unlock(chip->mutex);
569 spin_lock(chip->mutex);
570 /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
571 So we can just loop here. */
573 chip->state = FL_READY;
576 case FL_XIP_WHILE_ERASING:
577 if (mode != FL_READY && mode != FL_POINT &&
578 (!cfip || !(cfip->EraseSuspend&2)))
580 chip->oldstate = chip->state;
581 chip->state = FL_READY;
585 /* Only if there's no operation suspended... */
586 if (mode == FL_READY && chip->oldstate == FL_READY)
591 set_current_state(TASK_UNINTERRUPTIBLE);
592 add_wait_queue(&chip->wq, &wait);
593 spin_unlock(chip->mutex);
595 remove_wait_queue(&chip->wq, &wait);
596 spin_lock(chip->mutex);
602 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr)
604 struct cfi_private *cfi = map->fldrv_priv;
606 switch(chip->oldstate) {
608 chip->state = chip->oldstate;
609 map_write(map, CMD(0x30), chip->in_progress_block_addr);
610 chip->oldstate = FL_READY;
611 chip->state = FL_ERASING;
614 case FL_XIP_WHILE_ERASING:
615 chip->state = chip->oldstate;
616 chip->oldstate = FL_READY;
621 /* We should really make set_vpp() count, rather than doing this */
625 printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate);
630 #ifdef CONFIG_MTD_XIP
633 * No interrupt what so ever can be serviced while the flash isn't in array
634 * mode. This is ensured by the xip_disable() and xip_enable() functions
635 * enclosing any code path where the flash is known not to be in array mode.
636 * And within a XIP disabled code path, only functions marked with __xipram
637 * may be called and nothing else (it's a good thing to inspect generated
638 * assembly to make sure inline functions were actually inlined and that gcc
639 * didn't emit calls to its own support functions). Also configuring MTD CFI
640 * support to a single buswidth and a single interleave is also recommended.
643 static void xip_disable(struct map_info *map, struct flchip *chip,
646 /* TODO: chips with no XIP use should ignore and return */
647 (void) map_read(map, adr); /* ensure mmu mapping is up to date */
651 static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
654 struct cfi_private *cfi = map->fldrv_priv;
656 if (chip->state != FL_POINT && chip->state != FL_READY) {
657 map_write(map, CMD(0xf0), adr);
658 chip->state = FL_READY;
660 (void) map_read(map, adr);
666 * When a delay is required for the flash operation to complete, the
667 * xip_udelay() function is polling for both the given timeout and pending
668 * (but still masked) hardware interrupts. Whenever there is an interrupt
669 * pending then the flash erase operation is suspended, array mode restored
670 * and interrupts unmasked. Task scheduling might also happen at that
671 * point. The CPU eventually returns from the interrupt or the call to
672 * schedule() and the suspended flash operation is resumed for the remaining
673 * of the delay period.
675 * Warning: this function _will_ fool interrupt latency tracing tools.
678 static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
679 unsigned long adr, int usec)
681 struct cfi_private *cfi = map->fldrv_priv;
682 struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
683 map_word status, OK = CMD(0x80);
684 unsigned long suspended, start = xip_currtime();
689 if (xip_irqpending() && extp &&
690 ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) &&
691 (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) {
693 * Let's suspend the erase operation when supported.
694 * Note that we currently don't try to suspend
695 * interleaved chips if there is already another
696 * operation suspended (imagine what happens
697 * when one chip was already done with the current
698 * operation while another chip suspended it, then
699 * we resume the whole thing at once). Yes, it
702 map_write(map, CMD(0xb0), adr);
703 usec -= xip_elapsed_since(start);
704 suspended = xip_currtime();
706 if (xip_elapsed_since(suspended) > 100000) {
708 * The chip doesn't want to suspend
709 * after waiting for 100 msecs.
710 * This is a critical error but there
711 * is not much we can do here.
715 status = map_read(map, adr);
716 } while (!map_word_andequal(map, status, OK, OK));
718 /* Suspend succeeded */
719 oldstate = chip->state;
720 if (!map_word_bitsset(map, status, CMD(0x40)))
722 chip->state = FL_XIP_WHILE_ERASING;
723 chip->erase_suspended = 1;
724 map_write(map, CMD(0xf0), adr);
725 (void) map_read(map, adr);
726 asm volatile (".rep 8; nop; .endr");
728 spin_unlock(chip->mutex);
729 asm volatile (".rep 8; nop; .endr");
733 * We're back. However someone else might have
734 * decided to go write to the chip if we are in
735 * a suspended erase state. If so let's wait
738 spin_lock(chip->mutex);
739 while (chip->state != FL_XIP_WHILE_ERASING) {
740 DECLARE_WAITQUEUE(wait, current);
741 set_current_state(TASK_UNINTERRUPTIBLE);
742 add_wait_queue(&chip->wq, &wait);
743 spin_unlock(chip->mutex);
745 remove_wait_queue(&chip->wq, &wait);
746 spin_lock(chip->mutex);
748 /* Disallow XIP again */
751 /* Resume the write or erase operation */
752 map_write(map, CMD(0x30), adr);
753 chip->state = oldstate;
754 start = xip_currtime();
755 } else if (usec >= 1000000/HZ) {
757 * Try to save on CPU power when waiting delay
758 * is at least a system timer tick period.
759 * No need to be extremely accurate here.
763 status = map_read(map, adr);
764 } while (!map_word_andequal(map, status, OK, OK)
765 && xip_elapsed_since(start) < usec);
768 #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec)
771 * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while
772 * the flash is actively programming or erasing since we have to poll for
773 * the operation to complete anyway. We can't do that in a generic way with
774 * a XIP setup so do it before the actual flash operation in this case
775 * and stub it out from INVALIDATE_CACHE_UDELAY.
777 #define XIP_INVAL_CACHED_RANGE(map, from, size) \
778 INVALIDATE_CACHED_RANGE(map, from, size)
780 #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
781 UDELAY(map, chip, adr, usec)
786 * Activating this XIP support changes the way the code works a bit. For
787 * example the code to suspend the current process when concurrent access
788 * happens is never executed because xip_udelay() will always return with the
789 * same chip state as it was entered with. This is why there is no care for
790 * the presence of add_wait_queue() or schedule() calls from within a couple
791 * xip_disable()'d areas of code, like in do_erase_oneblock for example.
792 * The queueing and scheduling are always happening within xip_udelay().
794 * Similarly, get_chip() and put_chip() just happen to always be executed
795 * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state
796 * is in array mode, therefore never executing many cases therein and not
797 * causing any problem with XIP.
802 #define xip_disable(map, chip, adr)
803 #define xip_enable(map, chip, adr)
804 #define XIP_INVAL_CACHED_RANGE(x...)
806 #define UDELAY(map, chip, adr, usec) \
808 spin_unlock(chip->mutex); \
810 spin_lock(chip->mutex); \
813 #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
815 spin_unlock(chip->mutex); \
816 INVALIDATE_CACHED_RANGE(map, adr, len); \
818 spin_lock(chip->mutex); \
823 static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
825 unsigned long cmd_addr;
826 struct cfi_private *cfi = map->fldrv_priv;
831 /* Ensure cmd read/writes are aligned. */
832 cmd_addr = adr & ~(map_bankwidth(map)-1);
834 spin_lock(chip->mutex);
835 ret = get_chip(map, chip, cmd_addr, FL_READY);
837 spin_unlock(chip->mutex);
841 if (chip->state != FL_POINT && chip->state != FL_READY) {
842 map_write(map, CMD(0xf0), cmd_addr);
843 chip->state = FL_READY;
846 map_copy_from(map, buf, adr, len);
848 put_chip(map, chip, cmd_addr);
850 spin_unlock(chip->mutex);
855 static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
857 struct map_info *map = mtd->priv;
858 struct cfi_private *cfi = map->fldrv_priv;
863 /* ofs: offset within the first chip that the first read should start */
865 chipnum = (from >> cfi->chipshift);
866 ofs = from - (chipnum << cfi->chipshift);
872 unsigned long thislen;
874 if (chipnum >= cfi->numchips)
877 if ((len + ofs -1) >> cfi->chipshift)
878 thislen = (1<<cfi->chipshift) - ofs;
882 ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
897 static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
899 DECLARE_WAITQUEUE(wait, current);
900 unsigned long timeo = jiffies + HZ;
901 struct cfi_private *cfi = map->fldrv_priv;
904 spin_lock(chip->mutex);
906 if (chip->state != FL_READY){
908 printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state);
910 set_current_state(TASK_UNINTERRUPTIBLE);
911 add_wait_queue(&chip->wq, &wait);
913 spin_unlock(chip->mutex);
916 remove_wait_queue(&chip->wq, &wait);
918 if(signal_pending(current))
921 timeo = jiffies + HZ;
928 chip->state = FL_READY;
930 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
931 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
932 cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
934 map_copy_from(map, buf, adr, len);
936 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
937 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
938 cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
939 cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
942 spin_unlock(chip->mutex);
947 static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
949 struct map_info *map = mtd->priv;
950 struct cfi_private *cfi = map->fldrv_priv;
956 /* ofs: offset within the first chip that the first read should start */
958 /* 8 secsi bytes per chip */
966 unsigned long thislen;
968 if (chipnum >= cfi->numchips)
971 if ((len + ofs -1) >> 3)
972 thislen = (1<<3) - ofs;
976 ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
991 static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum)
993 struct cfi_private *cfi = map->fldrv_priv;
994 unsigned long timeo = jiffies + HZ;
996 * We use a 1ms + 1 jiffies generic timeout for writes (most devices
997 * have a max write time of a few hundreds usec). However, we should
998 * use the maximum timeout value given by the chip at probe time
999 * instead. Unfortunately, struct flchip does have a field for
1000 * maximum timeout, only for typical which can be far too short
1001 * depending of the conditions. The ' + 1' is to avoid having a
1002 * timeout of 0 jiffies if HZ is smaller than 1000.
1004 unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
1011 spin_lock(chip->mutex);
1012 ret = get_chip(map, chip, adr, FL_WRITING);
1014 spin_unlock(chip->mutex);
1018 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
1019 __func__, adr, datum.x[0] );
1022 * Check for a NOP for the case when the datum to write is already
1023 * present - it saves time and works around buggy chips that corrupt
1024 * data at other locations when 0xff is written to a location that
1025 * already contains 0xff.
1027 oldd = map_read(map, adr);
1028 if (map_word_equal(map, oldd, datum)) {
1029 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n",
1034 XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map));
1036 xip_disable(map, chip, adr);
1038 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1039 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1040 cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1041 map_write(map, datum, adr);
1042 chip->state = FL_WRITING;
1044 INVALIDATE_CACHE_UDELAY(map, chip,
1045 adr, map_bankwidth(map),
1046 chip->word_write_time);
1048 /* See comment above for timeout value. */
1049 timeo = jiffies + uWriteTimeout;
1051 if (chip->state != FL_WRITING) {
1052 /* Someone's suspended the write. Sleep */
1053 DECLARE_WAITQUEUE(wait, current);
1055 set_current_state(TASK_UNINTERRUPTIBLE);
1056 add_wait_queue(&chip->wq, &wait);
1057 spin_unlock(chip->mutex);
1059 remove_wait_queue(&chip->wq, &wait);
1060 timeo = jiffies + (HZ / 2); /* FIXME */
1061 spin_lock(chip->mutex);
1065 if (time_after(jiffies, timeo) && !chip_ready(map, adr)){
1066 xip_enable(map, chip, adr);
1067 printk(KERN_WARNING "MTD %s(): software timeout\n", __func__);
1068 xip_disable(map, chip, adr);
1072 if (chip_ready(map, adr))
1075 /* Latency issues. Drop the lock, wait a while and retry */
1076 UDELAY(map, chip, adr, 1);
1078 /* Did we succeed? */
1079 if (!chip_good(map, adr, datum)) {
1080 /* reset on all failures. */
1081 map_write( map, CMD(0xF0), chip->start );
1082 /* FIXME - should have reset delay before continuing */
1084 if (++retry_cnt <= MAX_WORD_RETRIES)
1089 xip_enable(map, chip, adr);
1091 chip->state = FL_READY;
1092 put_chip(map, chip, adr);
1093 spin_unlock(chip->mutex);
1099 static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len,
1100 size_t *retlen, const u_char *buf)
1102 struct map_info *map = mtd->priv;
1103 struct cfi_private *cfi = map->fldrv_priv;
1106 unsigned long ofs, chipstart;
1107 DECLARE_WAITQUEUE(wait, current);
1113 chipnum = to >> cfi->chipshift;
1114 ofs = to - (chipnum << cfi->chipshift);
1115 chipstart = cfi->chips[chipnum].start;
1117 /* If it's not bus-aligned, do the first byte write */
1118 if (ofs & (map_bankwidth(map)-1)) {
1119 unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1);
1120 int i = ofs - bus_ofs;
1125 spin_lock(cfi->chips[chipnum].mutex);
1127 if (cfi->chips[chipnum].state != FL_READY) {
1129 printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
1131 set_current_state(TASK_UNINTERRUPTIBLE);
1132 add_wait_queue(&cfi->chips[chipnum].wq, &wait);
1134 spin_unlock(cfi->chips[chipnum].mutex);
1137 remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
1139 if(signal_pending(current))
1145 /* Load 'tmp_buf' with old contents of flash */
1146 tmp_buf = map_read(map, bus_ofs+chipstart);
1148 spin_unlock(cfi->chips[chipnum].mutex);
1150 /* Number of bytes to copy from buffer */
1151 n = min_t(int, len, map_bankwidth(map)-i);
1153 tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n);
1155 ret = do_write_oneword(map, &cfi->chips[chipnum],
1165 if (ofs >> cfi->chipshift) {
1168 if (chipnum == cfi->numchips)
1173 /* We are now aligned, write as much as possible */
1174 while(len >= map_bankwidth(map)) {
1177 datum = map_word_load(map, buf);
1179 ret = do_write_oneword(map, &cfi->chips[chipnum],
1184 ofs += map_bankwidth(map);
1185 buf += map_bankwidth(map);
1186 (*retlen) += map_bankwidth(map);
1187 len -= map_bankwidth(map);
1189 if (ofs >> cfi->chipshift) {
1192 if (chipnum == cfi->numchips)
1194 chipstart = cfi->chips[chipnum].start;
1198 /* Write the trailing bytes if any */
1199 if (len & (map_bankwidth(map)-1)) {
1203 spin_lock(cfi->chips[chipnum].mutex);
1205 if (cfi->chips[chipnum].state != FL_READY) {
1207 printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
1209 set_current_state(TASK_UNINTERRUPTIBLE);
1210 add_wait_queue(&cfi->chips[chipnum].wq, &wait);
1212 spin_unlock(cfi->chips[chipnum].mutex);
1215 remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
1217 if(signal_pending(current))
1223 tmp_buf = map_read(map, ofs + chipstart);
1225 spin_unlock(cfi->chips[chipnum].mutex);
1227 tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len);
1229 ret = do_write_oneword(map, &cfi->chips[chipnum],
1242 * FIXME: interleaved mode not tested, and probably not supported!
1244 static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
1245 unsigned long adr, const u_char *buf,
1248 struct cfi_private *cfi = map->fldrv_priv;
1249 unsigned long timeo = jiffies + HZ;
1250 /* see comments in do_write_oneword() regarding uWriteTimeo. */
1251 unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
1253 unsigned long cmd_adr;
1260 spin_lock(chip->mutex);
1261 ret = get_chip(map, chip, adr, FL_WRITING);
1263 spin_unlock(chip->mutex);
1267 datum = map_word_load(map, buf);
1269 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
1270 __func__, adr, datum.x[0] );
1272 XIP_INVAL_CACHED_RANGE(map, adr, len);
1274 xip_disable(map, chip, cmd_adr);
1276 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1277 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1278 //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1280 /* Write Buffer Load */
1281 map_write(map, CMD(0x25), cmd_adr);
1283 chip->state = FL_WRITING_TO_BUFFER;
1285 /* Write length of data to come */
1286 words = len / map_bankwidth(map);
1287 map_write(map, CMD(words - 1), cmd_adr);
1290 while(z < words * map_bankwidth(map)) {
1291 datum = map_word_load(map, buf);
1292 map_write(map, datum, adr + z);
1294 z += map_bankwidth(map);
1295 buf += map_bankwidth(map);
1297 z -= map_bankwidth(map);
1301 /* Write Buffer Program Confirm: GO GO GO */
1302 map_write(map, CMD(0x29), cmd_adr);
1303 chip->state = FL_WRITING;
1305 INVALIDATE_CACHE_UDELAY(map, chip,
1306 adr, map_bankwidth(map),
1307 chip->word_write_time);
1309 timeo = jiffies + uWriteTimeout;
1312 if (chip->state != FL_WRITING) {
1313 /* Someone's suspended the write. Sleep */
1314 DECLARE_WAITQUEUE(wait, current);
1316 set_current_state(TASK_UNINTERRUPTIBLE);
1317 add_wait_queue(&chip->wq, &wait);
1318 spin_unlock(chip->mutex);
1320 remove_wait_queue(&chip->wq, &wait);
1321 timeo = jiffies + (HZ / 2); /* FIXME */
1322 spin_lock(chip->mutex);
1326 if (time_after(jiffies, timeo) && !chip_ready(map, adr))
1329 if (chip_ready(map, adr)) {
1330 xip_enable(map, chip, adr);
1334 /* Latency issues. Drop the lock, wait a while and retry */
1335 UDELAY(map, chip, adr, 1);
1338 /* reset on all failures. */
1339 map_write( map, CMD(0xF0), chip->start );
1340 xip_enable(map, chip, adr);
1341 /* FIXME - should have reset delay before continuing */
1343 printk(KERN_WARNING "MTD %s(): software timeout\n",
1348 chip->state = FL_READY;
1349 put_chip(map, chip, adr);
1350 spin_unlock(chip->mutex);
1356 static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
1357 size_t *retlen, const u_char *buf)
1359 struct map_info *map = mtd->priv;
1360 struct cfi_private *cfi = map->fldrv_priv;
1361 int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
1370 chipnum = to >> cfi->chipshift;
1371 ofs = to - (chipnum << cfi->chipshift);
1373 /* If it's not bus-aligned, do the first word write */
1374 if (ofs & (map_bankwidth(map)-1)) {
1375 size_t local_len = (-ofs)&(map_bankwidth(map)-1);
1376 if (local_len > len)
1378 ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
1379 local_len, retlen, buf);
1386 if (ofs >> cfi->chipshift) {
1389 if (chipnum == cfi->numchips)
1394 /* Write buffer is worth it only if more than one word to write... */
1395 while (len >= map_bankwidth(map) * 2) {
1396 /* We must not cross write block boundaries */
1397 int size = wbufsize - (ofs & (wbufsize-1));
1401 if (size % map_bankwidth(map))
1402 size -= size % map_bankwidth(map);
1404 ret = do_write_buffer(map, &cfi->chips[chipnum],
1414 if (ofs >> cfi->chipshift) {
1417 if (chipnum == cfi->numchips)
1423 size_t retlen_dregs = 0;
1425 ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
1426 len, &retlen_dregs, buf);
1428 *retlen += retlen_dregs;
1437 * Handle devices with one erase region, that only implement
1438 * the chip erase command.
1440 static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
1442 struct cfi_private *cfi = map->fldrv_priv;
1443 unsigned long timeo = jiffies + HZ;
1444 unsigned long int adr;
1445 DECLARE_WAITQUEUE(wait, current);
1448 adr = cfi->addr_unlock1;
1450 spin_lock(chip->mutex);
1451 ret = get_chip(map, chip, adr, FL_WRITING);
1453 spin_unlock(chip->mutex);
1457 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
1458 __func__, chip->start );
1460 XIP_INVAL_CACHED_RANGE(map, adr, map->size);
1462 xip_disable(map, chip, adr);
1464 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1465 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1466 cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1467 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1468 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1469 cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1471 chip->state = FL_ERASING;
1472 chip->erase_suspended = 0;
1473 chip->in_progress_block_addr = adr;
1475 INVALIDATE_CACHE_UDELAY(map, chip,
1477 chip->erase_time*500);
1479 timeo = jiffies + (HZ*20);
1482 if (chip->state != FL_ERASING) {
1483 /* Someone's suspended the erase. Sleep */
1484 set_current_state(TASK_UNINTERRUPTIBLE);
1485 add_wait_queue(&chip->wq, &wait);
1486 spin_unlock(chip->mutex);
1488 remove_wait_queue(&chip->wq, &wait);
1489 spin_lock(chip->mutex);
1492 if (chip->erase_suspended) {
1493 /* This erase was suspended and resumed.
1494 Adjust the timeout */
1495 timeo = jiffies + (HZ*20); /* FIXME */
1496 chip->erase_suspended = 0;
1499 if (chip_ready(map, adr))
1502 if (time_after(jiffies, timeo)) {
1503 printk(KERN_WARNING "MTD %s(): software timeout\n",
1508 /* Latency issues. Drop the lock, wait a while and retry */
1509 UDELAY(map, chip, adr, 1000000/HZ);
1511 /* Did we succeed? */
1512 if (!chip_good(map, adr, map_word_ff(map))) {
1513 /* reset on all failures. */
1514 map_write( map, CMD(0xF0), chip->start );
1515 /* FIXME - should have reset delay before continuing */
1520 chip->state = FL_READY;
1521 xip_enable(map, chip, adr);
1522 put_chip(map, chip, adr);
1523 spin_unlock(chip->mutex);
1529 static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk)
1531 struct cfi_private *cfi = map->fldrv_priv;
1532 unsigned long timeo = jiffies + HZ;
1533 DECLARE_WAITQUEUE(wait, current);
1538 spin_lock(chip->mutex);
1539 ret = get_chip(map, chip, adr, FL_ERASING);
1541 spin_unlock(chip->mutex);
1545 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
1548 XIP_INVAL_CACHED_RANGE(map, adr, len);
1550 xip_disable(map, chip, adr);
1552 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1553 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1554 cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1555 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1556 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1557 map_write(map, CMD(0x30), adr);
1559 chip->state = FL_ERASING;
1560 chip->erase_suspended = 0;
1561 chip->in_progress_block_addr = adr;
1563 INVALIDATE_CACHE_UDELAY(map, chip,
1565 chip->erase_time*500);
1567 timeo = jiffies + (HZ*20);
1570 if (chip->state != FL_ERASING) {
1571 /* Someone's suspended the erase. Sleep */
1572 set_current_state(TASK_UNINTERRUPTIBLE);
1573 add_wait_queue(&chip->wq, &wait);
1574 spin_unlock(chip->mutex);
1576 remove_wait_queue(&chip->wq, &wait);
1577 spin_lock(chip->mutex);
1580 if (chip->erase_suspended) {
1581 /* This erase was suspended and resumed.
1582 Adjust the timeout */
1583 timeo = jiffies + (HZ*20); /* FIXME */
1584 chip->erase_suspended = 0;
1587 if (chip_ready(map, adr)) {
1588 xip_enable(map, chip, adr);
1592 if (time_after(jiffies, timeo)) {
1593 xip_enable(map, chip, adr);
1594 printk(KERN_WARNING "MTD %s(): software timeout\n",
1599 /* Latency issues. Drop the lock, wait a while and retry */
1600 UDELAY(map, chip, adr, 1000000/HZ);
1602 /* Did we succeed? */
1603 if (!chip_good(map, adr, map_word_ff(map))) {
1604 /* reset on all failures. */
1605 map_write( map, CMD(0xF0), chip->start );
1606 /* FIXME - should have reset delay before continuing */
1611 chip->state = FL_READY;
1612 put_chip(map, chip, adr);
1613 spin_unlock(chip->mutex);
1618 static int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
1620 unsigned long ofs, len;
1626 ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL);
1630 instr->state = MTD_ERASE_DONE;
1631 mtd_erase_callback(instr);
1637 static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr)
1639 struct map_info *map = mtd->priv;
1640 struct cfi_private *cfi = map->fldrv_priv;
1643 if (instr->addr != 0)
1646 if (instr->len != mtd->size)
1649 ret = do_erase_chip(map, &cfi->chips[0]);
1653 instr->state = MTD_ERASE_DONE;
1654 mtd_erase_callback(instr);
1659 static int do_atmel_lock(struct map_info *map, struct flchip *chip,
1660 unsigned long adr, int len, void *thunk)
1662 struct cfi_private *cfi = map->fldrv_priv;
1665 spin_lock(chip->mutex);
1666 ret = get_chip(map, chip, adr + chip->start, FL_LOCKING);
1669 chip->state = FL_LOCKING;
1671 DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n",
1672 __func__, adr, len);
1674 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
1675 cfi->device_type, NULL);
1676 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
1677 cfi->device_type, NULL);
1678 cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi,
1679 cfi->device_type, NULL);
1680 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
1681 cfi->device_type, NULL);
1682 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi,
1683 cfi->device_type, NULL);
1684 map_write(map, CMD(0x40), chip->start + adr);
1686 chip->state = FL_READY;
1687 put_chip(map, chip, adr + chip->start);
1691 spin_unlock(chip->mutex);
1695 static int do_atmel_unlock(struct map_info *map, struct flchip *chip,
1696 unsigned long adr, int len, void *thunk)
1698 struct cfi_private *cfi = map->fldrv_priv;
1701 spin_lock(chip->mutex);
1702 ret = get_chip(map, chip, adr + chip->start, FL_UNLOCKING);
1705 chip->state = FL_UNLOCKING;
1707 DEBUG(MTD_DEBUG_LEVEL3, "MTD %s(): LOCK 0x%08lx len %d\n",
1708 __func__, adr, len);
1710 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi,
1711 cfi->device_type, NULL);
1712 map_write(map, CMD(0x70), adr);
1714 chip->state = FL_READY;
1715 put_chip(map, chip, adr + chip->start);
1719 spin_unlock(chip->mutex);
1723 static int cfi_atmel_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
1725 return cfi_varsize_frob(mtd, do_atmel_lock, ofs, len, NULL);
1728 static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
1730 return cfi_varsize_frob(mtd, do_atmel_unlock, ofs, len, NULL);
1734 static void cfi_amdstd_sync (struct mtd_info *mtd)
1736 struct map_info *map = mtd->priv;
1737 struct cfi_private *cfi = map->fldrv_priv;
1739 struct flchip *chip;
1741 DECLARE_WAITQUEUE(wait, current);
1743 for (i=0; !ret && i<cfi->numchips; i++) {
1744 chip = &cfi->chips[i];
1747 spin_lock(chip->mutex);
1749 switch(chip->state) {
1753 case FL_JEDEC_QUERY:
1754 chip->oldstate = chip->state;
1755 chip->state = FL_SYNCING;
1756 /* No need to wake_up() on this state change -
1757 * as the whole point is that nobody can do anything
1758 * with the chip now anyway.
1761 spin_unlock(chip->mutex);
1765 /* Not an idle state */
1766 add_wait_queue(&chip->wq, &wait);
1768 spin_unlock(chip->mutex);
1772 remove_wait_queue(&chip->wq, &wait);
1778 /* Unlock the chips again */
1780 for (i--; i >=0; i--) {
1781 chip = &cfi->chips[i];
1783 spin_lock(chip->mutex);
1785 if (chip->state == FL_SYNCING) {
1786 chip->state = chip->oldstate;
1789 spin_unlock(chip->mutex);
1794 static int cfi_amdstd_suspend(struct mtd_info *mtd)
1796 struct map_info *map = mtd->priv;
1797 struct cfi_private *cfi = map->fldrv_priv;
1799 struct flchip *chip;
1802 for (i=0; !ret && i<cfi->numchips; i++) {
1803 chip = &cfi->chips[i];
1805 spin_lock(chip->mutex);
1807 switch(chip->state) {
1811 case FL_JEDEC_QUERY:
1812 chip->oldstate = chip->state;
1813 chip->state = FL_PM_SUSPENDED;
1814 /* No need to wake_up() on this state change -
1815 * as the whole point is that nobody can do anything
1816 * with the chip now anyway.
1818 case FL_PM_SUSPENDED:
1825 spin_unlock(chip->mutex);
1828 /* Unlock the chips again */
1831 for (i--; i >=0; i--) {
1832 chip = &cfi->chips[i];
1834 spin_lock(chip->mutex);
1836 if (chip->state == FL_PM_SUSPENDED) {
1837 chip->state = chip->oldstate;
1840 spin_unlock(chip->mutex);
1848 static void cfi_amdstd_resume(struct mtd_info *mtd)
1850 struct map_info *map = mtd->priv;
1851 struct cfi_private *cfi = map->fldrv_priv;
1853 struct flchip *chip;
1855 for (i=0; i<cfi->numchips; i++) {
1857 chip = &cfi->chips[i];
1859 spin_lock(chip->mutex);
1861 if (chip->state == FL_PM_SUSPENDED) {
1862 chip->state = FL_READY;
1863 map_write(map, CMD(0xF0), chip->start);
1867 printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n");
1869 spin_unlock(chip->mutex);
1873 static void cfi_amdstd_destroy(struct mtd_info *mtd)
1875 struct map_info *map = mtd->priv;
1876 struct cfi_private *cfi = map->fldrv_priv;
1878 kfree(cfi->cmdset_priv);
1881 kfree(mtd->eraseregions);
1884 MODULE_LICENSE("GPL");
1885 MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al.");
1886 MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips");