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 1.118 2005/07/04 22:34:29 gleixner Exp $
24 #include <linux/config.h>
25 #include <linux/module.h>
26 #include <linux/types.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/init.h>
31 #include <asm/byteorder.h>
33 #include <linux/errno.h>
34 #include <linux/slab.h>
35 #include <linux/delay.h>
36 #include <linux/interrupt.h>
37 #include <linux/mtd/compatmac.h>
38 #include <linux/mtd/map.h>
39 #include <linux/mtd/mtd.h>
40 #include <linux/mtd/cfi.h>
41 #include <linux/mtd/xip.h>
43 #define AMD_BOOTLOC_BUG
44 #define FORCE_WORD_WRITE 0
46 #define MAX_WORD_RETRIES 3
48 #define MANUFACTURER_AMD 0x0001
49 #define MANUFACTURER_SST 0x00BF
50 #define SST49LF004B 0x0060
51 #define SST49LF008A 0x005a
53 static int cfi_amdstd_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
54 static int cfi_amdstd_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
55 static int cfi_amdstd_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
56 static int cfi_amdstd_erase_chip(struct mtd_info *, struct erase_info *);
57 static int cfi_amdstd_erase_varsize(struct mtd_info *, struct erase_info *);
58 static void cfi_amdstd_sync (struct mtd_info *);
59 static int cfi_amdstd_suspend (struct mtd_info *);
60 static void cfi_amdstd_resume (struct mtd_info *);
61 static int cfi_amdstd_secsi_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
63 static void cfi_amdstd_destroy(struct mtd_info *);
65 struct mtd_info *cfi_cmdset_0002(struct map_info *, int);
66 static struct mtd_info *cfi_amdstd_setup (struct mtd_info *);
68 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode);
69 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr);
72 static struct mtd_chip_driver cfi_amdstd_chipdrv = {
73 .probe = NULL, /* Not usable directly */
74 .destroy = cfi_amdstd_destroy,
75 .name = "cfi_cmdset_0002",
80 /* #define DEBUG_CFI_FEATURES */
83 #ifdef DEBUG_CFI_FEATURES
84 static void cfi_tell_features(struct cfi_pri_amdstd *extp)
86 const char* erase_suspend[3] = {
87 "Not supported", "Read only", "Read/write"
89 const char* top_bottom[6] = {
90 "No WP", "8x8KiB sectors at top & bottom, no WP",
91 "Bottom boot", "Top boot",
92 "Uniform, Bottom WP", "Uniform, Top WP"
95 printk(" Silicon revision: %d\n", extp->SiliconRevision >> 1);
96 printk(" Address sensitive unlock: %s\n",
97 (extp->SiliconRevision & 1) ? "Not required" : "Required");
99 if (extp->EraseSuspend < ARRAY_SIZE(erase_suspend))
100 printk(" Erase Suspend: %s\n", erase_suspend[extp->EraseSuspend]);
102 printk(" Erase Suspend: Unknown value %d\n", extp->EraseSuspend);
104 if (extp->BlkProt == 0)
105 printk(" Block protection: Not supported\n");
107 printk(" Block protection: %d sectors per group\n", extp->BlkProt);
110 printk(" Temporary block unprotect: %s\n",
111 extp->TmpBlkUnprotect ? "Supported" : "Not supported");
112 printk(" Block protect/unprotect scheme: %d\n", extp->BlkProtUnprot);
113 printk(" Number of simultaneous operations: %d\n", extp->SimultaneousOps);
114 printk(" Burst mode: %s\n",
115 extp->BurstMode ? "Supported" : "Not supported");
116 if (extp->PageMode == 0)
117 printk(" Page mode: Not supported\n");
119 printk(" Page mode: %d word page\n", extp->PageMode << 2);
121 printk(" Vpp Supply Minimum Program/Erase Voltage: %d.%d V\n",
122 extp->VppMin >> 4, extp->VppMin & 0xf);
123 printk(" Vpp Supply Maximum Program/Erase Voltage: %d.%d V\n",
124 extp->VppMax >> 4, extp->VppMax & 0xf);
126 if (extp->TopBottom < ARRAY_SIZE(top_bottom))
127 printk(" Top/Bottom Boot Block: %s\n", top_bottom[extp->TopBottom]);
129 printk(" Top/Bottom Boot Block: Unknown value %d\n", extp->TopBottom);
133 #ifdef AMD_BOOTLOC_BUG
134 /* Wheee. Bring me the head of someone at AMD. */
135 static void fixup_amd_bootblock(struct mtd_info *mtd, void* param)
137 struct map_info *map = mtd->priv;
138 struct cfi_private *cfi = map->fldrv_priv;
139 struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
140 __u8 major = extp->MajorVersion;
141 __u8 minor = extp->MinorVersion;
143 if (((major << 8) | minor) < 0x3131) {
144 /* CFI version 1.0 => don't trust bootloc */
145 if (cfi->id & 0x80) {
146 printk(KERN_WARNING "%s: JEDEC Device ID is 0x%02X. Assuming broken CFI table.\n", map->name, cfi->id);
147 extp->TopBottom = 3; /* top boot */
149 extp->TopBottom = 2; /* bottom boot */
155 static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
157 struct map_info *map = mtd->priv;
158 struct cfi_private *cfi = map->fldrv_priv;
159 if (cfi->cfiq->BufWriteTimeoutTyp) {
160 DEBUG(MTD_DEBUG_LEVEL1, "Using buffer write method\n" );
161 mtd->write = cfi_amdstd_write_buffers;
165 static void fixup_use_secsi(struct mtd_info *mtd, void *param)
167 /* Setup for chips with a secsi area */
168 mtd->read_user_prot_reg = cfi_amdstd_secsi_read;
169 mtd->read_fact_prot_reg = cfi_amdstd_secsi_read;
172 static void fixup_use_erase_chip(struct mtd_info *mtd, void *param)
174 struct map_info *map = mtd->priv;
175 struct cfi_private *cfi = map->fldrv_priv;
176 if ((cfi->cfiq->NumEraseRegions == 1) &&
177 ((cfi->cfiq->EraseRegionInfo[0] & 0xffff) == 0)) {
178 mtd->erase = cfi_amdstd_erase_chip;
183 static struct cfi_fixup cfi_fixup_table[] = {
184 #ifdef AMD_BOOTLOC_BUG
185 { CFI_MFR_AMD, CFI_ID_ANY, fixup_amd_bootblock, NULL },
187 { CFI_MFR_AMD, 0x0050, fixup_use_secsi, NULL, },
188 { CFI_MFR_AMD, 0x0053, fixup_use_secsi, NULL, },
189 { CFI_MFR_AMD, 0x0055, fixup_use_secsi, NULL, },
190 { CFI_MFR_AMD, 0x0056, fixup_use_secsi, NULL, },
191 { CFI_MFR_AMD, 0x005C, fixup_use_secsi, NULL, },
192 { CFI_MFR_AMD, 0x005F, fixup_use_secsi, NULL, },
193 #if !FORCE_WORD_WRITE
194 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
198 static struct cfi_fixup jedec_fixup_table[] = {
199 { MANUFACTURER_SST, SST49LF004B, fixup_use_fwh_lock, NULL, },
200 { MANUFACTURER_SST, SST49LF008A, fixup_use_fwh_lock, NULL, },
204 static struct cfi_fixup fixup_table[] = {
205 /* The CFI vendor ids and the JEDEC vendor IDs appear
206 * to be common. It is like the devices id's are as
207 * well. This table is to pick all cases where
208 * we know that is the case.
210 { CFI_MFR_ANY, CFI_ID_ANY, fixup_use_erase_chip, NULL },
215 struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
217 struct cfi_private *cfi = map->fldrv_priv;
218 struct mtd_info *mtd;
221 mtd = kmalloc(sizeof(*mtd), GFP_KERNEL);
223 printk(KERN_WARNING "Failed to allocate memory for MTD device\n");
226 memset(mtd, 0, sizeof(*mtd));
228 mtd->type = MTD_NORFLASH;
230 /* Fill in the default mtd operations */
231 mtd->erase = cfi_amdstd_erase_varsize;
232 mtd->write = cfi_amdstd_write_words;
233 mtd->read = cfi_amdstd_read;
234 mtd->sync = cfi_amdstd_sync;
235 mtd->suspend = cfi_amdstd_suspend;
236 mtd->resume = cfi_amdstd_resume;
237 mtd->flags = MTD_CAP_NORFLASH;
238 mtd->name = map->name;
240 if (cfi->cfi_mode==CFI_MODE_CFI){
241 unsigned char bootloc;
243 * It's a real CFI chip, not one for which the probe
244 * routine faked a CFI structure. So we read the feature
247 __u16 adr = primary?cfi->cfiq->P_ADR:cfi->cfiq->A_ADR;
248 struct cfi_pri_amdstd *extp;
250 extp = (struct cfi_pri_amdstd*)cfi_read_pri(map, adr, sizeof(*extp), "Amd/Fujitsu");
256 /* Install our own private info structure */
257 cfi->cmdset_priv = extp;
259 /* Apply cfi device specific fixups */
260 cfi_fixup(mtd, cfi_fixup_table);
262 #ifdef DEBUG_CFI_FEATURES
263 /* Tell the user about it in lots of lovely detail */
264 cfi_tell_features(extp);
267 bootloc = extp->TopBottom;
268 if ((bootloc != 2) && (bootloc != 3)) {
269 printk(KERN_WARNING "%s: CFI does not contain boot "
270 "bank location. Assuming top.\n", map->name);
274 if (bootloc == 3 && cfi->cfiq->NumEraseRegions > 1) {
275 printk(KERN_WARNING "%s: Swapping erase regions for broken CFI table.\n", map->name);
277 for (i=0; i<cfi->cfiq->NumEraseRegions / 2; i++) {
278 int j = (cfi->cfiq->NumEraseRegions-1)-i;
281 swap = cfi->cfiq->EraseRegionInfo[i];
282 cfi->cfiq->EraseRegionInfo[i] = cfi->cfiq->EraseRegionInfo[j];
283 cfi->cfiq->EraseRegionInfo[j] = swap;
286 /* Set the default CFI lock/unlock addresses */
287 cfi->addr_unlock1 = 0x555;
288 cfi->addr_unlock2 = 0x2aa;
289 /* Modify the unlock address if we are in compatibility mode */
290 if ( /* x16 in x8 mode */
291 ((cfi->device_type == CFI_DEVICETYPE_X8) &&
292 (cfi->cfiq->InterfaceDesc == 2)) ||
293 /* x32 in x16 mode */
294 ((cfi->device_type == CFI_DEVICETYPE_X16) &&
295 (cfi->cfiq->InterfaceDesc == 4)))
297 cfi->addr_unlock1 = 0xaaa;
298 cfi->addr_unlock2 = 0x555;
302 else if (cfi->cfi_mode == CFI_MODE_JEDEC) {
303 /* Apply jedec specific fixups */
304 cfi_fixup(mtd, jedec_fixup_table);
306 /* Apply generic fixups */
307 cfi_fixup(mtd, fixup_table);
309 for (i=0; i< cfi->numchips; i++) {
310 cfi->chips[i].word_write_time = 1<<cfi->cfiq->WordWriteTimeoutTyp;
311 cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
312 cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
315 map->fldrv = &cfi_amdstd_chipdrv;
317 return cfi_amdstd_setup(mtd);
321 static struct mtd_info *cfi_amdstd_setup(struct mtd_info *mtd)
323 struct map_info *map = mtd->priv;
324 struct cfi_private *cfi = map->fldrv_priv;
325 unsigned long devsize = (1<<cfi->cfiq->DevSize) * cfi->interleave;
326 unsigned long offset = 0;
329 printk(KERN_NOTICE "number of %s chips: %d\n",
330 (cfi->cfi_mode == CFI_MODE_CFI)?"CFI":"JEDEC",cfi->numchips);
331 /* Select the correct geometry setup */
332 mtd->size = devsize * cfi->numchips;
334 mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
335 mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
336 * mtd->numeraseregions, GFP_KERNEL);
337 if (!mtd->eraseregions) {
338 printk(KERN_WARNING "Failed to allocate memory for MTD erase region info\n");
342 for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
343 unsigned long ernum, ersize;
344 ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
345 ernum = (cfi->cfiq->EraseRegionInfo[i] & 0xffff) + 1;
347 if (mtd->erasesize < ersize) {
348 mtd->erasesize = ersize;
350 for (j=0; j<cfi->numchips; j++) {
351 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].offset = (j*devsize)+offset;
352 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize;
353 mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum;
355 offset += (ersize * ernum);
357 if (offset != devsize) {
359 printk(KERN_WARNING "Sum of regions (%lx) != total size of set of interleaved chips (%lx)\n", offset, devsize);
364 for (i=0; i<mtd->numeraseregions;i++){
365 printk("%d: offset=0x%x,size=0x%x,blocks=%d\n",
366 i,mtd->eraseregions[i].offset,
367 mtd->eraseregions[i].erasesize,
368 mtd->eraseregions[i].numblocks);
372 /* FIXME: erase-suspend-program is broken. See
373 http://lists.infradead.org/pipermail/linux-mtd/2003-December/009001.html */
374 printk(KERN_NOTICE "cfi_cmdset_0002: Disabling erase-suspend-program due to code brokenness.\n");
376 __module_get(THIS_MODULE);
381 if(mtd->eraseregions)
382 kfree(mtd->eraseregions);
385 kfree(cfi->cmdset_priv);
391 * Return true if the chip is ready.
393 * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
394 * non-suspended sector) and is indicated by no toggle bits toggling.
396 * Note that anything more complicated than checking if no bits are toggling
397 * (including checking DQ5 for an error status) is tricky to get working
398 * correctly and is therefore not done (particulary with interleaved chips
399 * as each chip must be checked independantly of the others).
401 static int __xipram chip_ready(struct map_info *map, unsigned long addr)
405 d = map_read(map, addr);
406 t = map_read(map, addr);
408 return map_word_equal(map, d, t);
412 * Return true if the chip is ready and has the correct value.
414 * Ready is one of: read mode, query mode, erase-suspend-read mode (in any
415 * non-suspended sector) and it is indicated by no bits toggling.
417 * Error are indicated by toggling bits or bits held with the wrong value,
418 * or with bits toggling.
420 * Note that anything more complicated than checking if no bits are toggling
421 * (including checking DQ5 for an error status) is tricky to get working
422 * correctly and is therefore not done (particulary with interleaved chips
423 * as each chip must be checked independantly of the others).
426 static int __xipram chip_good(struct map_info *map, unsigned long addr, map_word expected)
430 oldd = map_read(map, addr);
431 curd = map_read(map, addr);
433 return map_word_equal(map, oldd, curd) &&
434 map_word_equal(map, curd, expected);
437 static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr, int mode)
439 DECLARE_WAITQUEUE(wait, current);
440 struct cfi_private *cfi = map->fldrv_priv;
442 struct cfi_pri_amdstd *cfip = (struct cfi_pri_amdstd *)cfi->cmdset_priv;
445 timeo = jiffies + HZ;
447 switch (chip->state) {
451 if (chip_ready(map, adr))
454 if (time_after(jiffies, timeo)) {
455 printk(KERN_ERR "Waiting for chip to be ready timed out.\n");
456 spin_unlock(chip->mutex);
459 spin_unlock(chip->mutex);
461 spin_lock(chip->mutex);
462 /* Someone else might have been playing with it. */
472 if (mode == FL_WRITING) /* FIXME: Erase-suspend-program appears broken. */
475 if (!(mode == FL_READY || mode == FL_POINT
477 || (mode == FL_WRITING && (cfip->EraseSuspend & 0x2))
478 || (mode == FL_WRITING && (cfip->EraseSuspend & 0x1))))
481 /* We could check to see if we're trying to access the sector
482 * that is currently being erased. However, no user will try
483 * anything like that so we just wait for the timeout. */
486 /* It's harmless to issue the Erase-Suspend and Erase-Resume
487 * commands when the erase algorithm isn't in progress. */
488 map_write(map, CMD(0xB0), chip->in_progress_block_addr);
489 chip->oldstate = FL_ERASING;
490 chip->state = FL_ERASE_SUSPENDING;
491 chip->erase_suspended = 1;
493 if (chip_ready(map, adr))
496 if (time_after(jiffies, timeo)) {
497 /* Should have suspended the erase by now.
498 * Send an Erase-Resume command as either
499 * there was an error (so leave the erase
500 * routine to recover from it) or we trying to
501 * use the erase-in-progress sector. */
502 map_write(map, CMD(0x30), chip->in_progress_block_addr);
503 chip->state = FL_ERASING;
504 chip->oldstate = FL_READY;
505 printk(KERN_ERR "MTD %s(): chip not ready after erase suspend\n", __func__);
509 spin_unlock(chip->mutex);
511 spin_lock(chip->mutex);
512 /* Nobody will touch it while it's in state FL_ERASE_SUSPENDING.
513 So we can just loop here. */
515 chip->state = FL_READY;
518 case FL_XIP_WHILE_ERASING:
519 if (mode != FL_READY && mode != FL_POINT &&
520 (!cfip || !(cfip->EraseSuspend&2)))
522 chip->oldstate = chip->state;
523 chip->state = FL_READY;
527 /* Only if there's no operation suspended... */
528 if (mode == FL_READY && chip->oldstate == FL_READY)
533 set_current_state(TASK_UNINTERRUPTIBLE);
534 add_wait_queue(&chip->wq, &wait);
535 spin_unlock(chip->mutex);
537 remove_wait_queue(&chip->wq, &wait);
538 spin_lock(chip->mutex);
544 static void put_chip(struct map_info *map, struct flchip *chip, unsigned long adr)
546 struct cfi_private *cfi = map->fldrv_priv;
548 switch(chip->oldstate) {
550 chip->state = chip->oldstate;
551 map_write(map, CMD(0x30), chip->in_progress_block_addr);
552 chip->oldstate = FL_READY;
553 chip->state = FL_ERASING;
556 case FL_XIP_WHILE_ERASING:
557 chip->state = chip->oldstate;
558 chip->oldstate = FL_READY;
563 /* We should really make set_vpp() count, rather than doing this */
567 printk(KERN_ERR "MTD: put_chip() called with oldstate %d!!\n", chip->oldstate);
572 #ifdef CONFIG_MTD_XIP
575 * No interrupt what so ever can be serviced while the flash isn't in array
576 * mode. This is ensured by the xip_disable() and xip_enable() functions
577 * enclosing any code path where the flash is known not to be in array mode.
578 * And within a XIP disabled code path, only functions marked with __xipram
579 * may be called and nothing else (it's a good thing to inspect generated
580 * assembly to make sure inline functions were actually inlined and that gcc
581 * didn't emit calls to its own support functions). Also configuring MTD CFI
582 * support to a single buswidth and a single interleave is also recommended.
585 static void xip_disable(struct map_info *map, struct flchip *chip,
588 /* TODO: chips with no XIP use should ignore and return */
589 (void) map_read(map, adr); /* ensure mmu mapping is up to date */
593 static void __xipram xip_enable(struct map_info *map, struct flchip *chip,
596 struct cfi_private *cfi = map->fldrv_priv;
598 if (chip->state != FL_POINT && chip->state != FL_READY) {
599 map_write(map, CMD(0xf0), adr);
600 chip->state = FL_READY;
602 (void) map_read(map, adr);
608 * When a delay is required for the flash operation to complete, the
609 * xip_udelay() function is polling for both the given timeout and pending
610 * (but still masked) hardware interrupts. Whenever there is an interrupt
611 * pending then the flash erase operation is suspended, array mode restored
612 * and interrupts unmasked. Task scheduling might also happen at that
613 * point. The CPU eventually returns from the interrupt or the call to
614 * schedule() and the suspended flash operation is resumed for the remaining
615 * of the delay period.
617 * Warning: this function _will_ fool interrupt latency tracing tools.
620 static void __xipram xip_udelay(struct map_info *map, struct flchip *chip,
621 unsigned long adr, int usec)
623 struct cfi_private *cfi = map->fldrv_priv;
624 struct cfi_pri_amdstd *extp = cfi->cmdset_priv;
625 map_word status, OK = CMD(0x80);
626 unsigned long suspended, start = xip_currtime();
631 if (xip_irqpending() && extp &&
632 ((chip->state == FL_ERASING && (extp->EraseSuspend & 2))) &&
633 (cfi_interleave_is_1(cfi) || chip->oldstate == FL_READY)) {
635 * Let's suspend the erase operation when supported.
636 * Note that we currently don't try to suspend
637 * interleaved chips if there is already another
638 * operation suspended (imagine what happens
639 * when one chip was already done with the current
640 * operation while another chip suspended it, then
641 * we resume the whole thing at once). Yes, it
644 map_write(map, CMD(0xb0), adr);
645 usec -= xip_elapsed_since(start);
646 suspended = xip_currtime();
648 if (xip_elapsed_since(suspended) > 100000) {
650 * The chip doesn't want to suspend
651 * after waiting for 100 msecs.
652 * This is a critical error but there
653 * is not much we can do here.
657 status = map_read(map, adr);
658 } while (!map_word_andequal(map, status, OK, OK));
660 /* Suspend succeeded */
661 oldstate = chip->state;
662 if (!map_word_bitsset(map, status, CMD(0x40)))
664 chip->state = FL_XIP_WHILE_ERASING;
665 chip->erase_suspended = 1;
666 map_write(map, CMD(0xf0), adr);
667 (void) map_read(map, adr);
668 asm volatile (".rep 8; nop; .endr");
670 spin_unlock(chip->mutex);
671 asm volatile (".rep 8; nop; .endr");
675 * We're back. However someone else might have
676 * decided to go write to the chip if we are in
677 * a suspended erase state. If so let's wait
680 spin_lock(chip->mutex);
681 while (chip->state != FL_XIP_WHILE_ERASING) {
682 DECLARE_WAITQUEUE(wait, current);
683 set_current_state(TASK_UNINTERRUPTIBLE);
684 add_wait_queue(&chip->wq, &wait);
685 spin_unlock(chip->mutex);
687 remove_wait_queue(&chip->wq, &wait);
688 spin_lock(chip->mutex);
690 /* Disallow XIP again */
693 /* Resume the write or erase operation */
694 map_write(map, CMD(0x30), adr);
695 chip->state = oldstate;
696 start = xip_currtime();
697 } else if (usec >= 1000000/HZ) {
699 * Try to save on CPU power when waiting delay
700 * is at least a system timer tick period.
701 * No need to be extremely accurate here.
705 status = map_read(map, adr);
706 } while (!map_word_andequal(map, status, OK, OK)
707 && xip_elapsed_since(start) < usec);
710 #define UDELAY(map, chip, adr, usec) xip_udelay(map, chip, adr, usec)
713 * The INVALIDATE_CACHED_RANGE() macro is normally used in parallel while
714 * the flash is actively programming or erasing since we have to poll for
715 * the operation to complete anyway. We can't do that in a generic way with
716 * a XIP setup so do it before the actual flash operation in this case
717 * and stub it out from INVALIDATE_CACHE_UDELAY.
719 #define XIP_INVAL_CACHED_RANGE(map, from, size) \
720 INVALIDATE_CACHED_RANGE(map, from, size)
722 #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
723 UDELAY(map, chip, adr, usec)
728 * Activating this XIP support changes the way the code works a bit. For
729 * example the code to suspend the current process when concurrent access
730 * happens is never executed because xip_udelay() will always return with the
731 * same chip state as it was entered with. This is why there is no care for
732 * the presence of add_wait_queue() or schedule() calls from within a couple
733 * xip_disable()'d areas of code, like in do_erase_oneblock for example.
734 * The queueing and scheduling are always happening within xip_udelay().
736 * Similarly, get_chip() and put_chip() just happen to always be executed
737 * with chip->state set to FL_READY (or FL_XIP_WHILE_*) where flash state
738 * is in array mode, therefore never executing many cases therein and not
739 * causing any problem with XIP.
744 #define xip_disable(map, chip, adr)
745 #define xip_enable(map, chip, adr)
746 #define XIP_INVAL_CACHED_RANGE(x...)
748 #define UDELAY(map, chip, adr, usec) \
750 spin_unlock(chip->mutex); \
752 spin_lock(chip->mutex); \
755 #define INVALIDATE_CACHE_UDELAY(map, chip, adr, len, usec) \
757 spin_unlock(chip->mutex); \
758 INVALIDATE_CACHED_RANGE(map, adr, len); \
760 spin_lock(chip->mutex); \
765 static inline int do_read_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
767 unsigned long cmd_addr;
768 struct cfi_private *cfi = map->fldrv_priv;
773 /* Ensure cmd read/writes are aligned. */
774 cmd_addr = adr & ~(map_bankwidth(map)-1);
776 spin_lock(chip->mutex);
777 ret = get_chip(map, chip, cmd_addr, FL_READY);
779 spin_unlock(chip->mutex);
783 if (chip->state != FL_POINT && chip->state != FL_READY) {
784 map_write(map, CMD(0xf0), cmd_addr);
785 chip->state = FL_READY;
788 map_copy_from(map, buf, adr, len);
790 put_chip(map, chip, cmd_addr);
792 spin_unlock(chip->mutex);
797 static int cfi_amdstd_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
799 struct map_info *map = mtd->priv;
800 struct cfi_private *cfi = map->fldrv_priv;
805 /* ofs: offset within the first chip that the first read should start */
807 chipnum = (from >> cfi->chipshift);
808 ofs = from - (chipnum << cfi->chipshift);
814 unsigned long thislen;
816 if (chipnum >= cfi->numchips)
819 if ((len + ofs -1) >> cfi->chipshift)
820 thislen = (1<<cfi->chipshift) - ofs;
824 ret = do_read_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
839 static inline int do_read_secsi_onechip(struct map_info *map, struct flchip *chip, loff_t adr, size_t len, u_char *buf)
841 DECLARE_WAITQUEUE(wait, current);
842 unsigned long timeo = jiffies + HZ;
843 struct cfi_private *cfi = map->fldrv_priv;
846 spin_lock(chip->mutex);
848 if (chip->state != FL_READY){
850 printk(KERN_DEBUG "Waiting for chip to read, status = %d\n", chip->state);
852 set_current_state(TASK_UNINTERRUPTIBLE);
853 add_wait_queue(&chip->wq, &wait);
855 spin_unlock(chip->mutex);
858 remove_wait_queue(&chip->wq, &wait);
860 if(signal_pending(current))
863 timeo = jiffies + HZ;
870 chip->state = FL_READY;
872 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
873 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
874 cfi_send_gen_cmd(0x88, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
876 map_copy_from(map, buf, adr, len);
878 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
879 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
880 cfi_send_gen_cmd(0x90, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
881 cfi_send_gen_cmd(0x00, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
884 spin_unlock(chip->mutex);
889 static int cfi_amdstd_secsi_read (struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen, u_char *buf)
891 struct map_info *map = mtd->priv;
892 struct cfi_private *cfi = map->fldrv_priv;
898 /* ofs: offset within the first chip that the first read should start */
900 /* 8 secsi bytes per chip */
908 unsigned long thislen;
910 if (chipnum >= cfi->numchips)
913 if ((len + ofs -1) >> 3)
914 thislen = (1<<3) - ofs;
918 ret = do_read_secsi_onechip(map, &cfi->chips[chipnum], ofs, thislen, buf);
933 static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip, unsigned long adr, map_word datum)
935 struct cfi_private *cfi = map->fldrv_priv;
936 unsigned long timeo = jiffies + HZ;
938 * We use a 1ms + 1 jiffies generic timeout for writes (most devices
939 * have a max write time of a few hundreds usec). However, we should
940 * use the maximum timeout value given by the chip at probe time
941 * instead. Unfortunately, struct flchip does have a field for
942 * maximum timeout, only for typical which can be far too short
943 * depending of the conditions. The ' + 1' is to avoid having a
944 * timeout of 0 jiffies if HZ is smaller than 1000.
946 unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
953 spin_lock(chip->mutex);
954 ret = get_chip(map, chip, adr, FL_WRITING);
956 spin_unlock(chip->mutex);
960 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
961 __func__, adr, datum.x[0] );
964 * Check for a NOP for the case when the datum to write is already
965 * present - it saves time and works around buggy chips that corrupt
966 * data at other locations when 0xff is written to a location that
967 * already contains 0xff.
969 oldd = map_read(map, adr);
970 if (map_word_equal(map, oldd, datum)) {
971 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): NOP\n",
976 XIP_INVAL_CACHED_RANGE(map, adr, map_bankwidth(map));
978 xip_disable(map, chip, adr);
980 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
981 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
982 cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
983 map_write(map, datum, adr);
984 chip->state = FL_WRITING;
986 INVALIDATE_CACHE_UDELAY(map, chip,
987 adr, map_bankwidth(map),
988 chip->word_write_time);
990 /* See comment above for timeout value. */
991 timeo = jiffies + uWriteTimeout;
993 if (chip->state != FL_WRITING) {
994 /* Someone's suspended the write. Sleep */
995 DECLARE_WAITQUEUE(wait, current);
997 set_current_state(TASK_UNINTERRUPTIBLE);
998 add_wait_queue(&chip->wq, &wait);
999 spin_unlock(chip->mutex);
1001 remove_wait_queue(&chip->wq, &wait);
1002 timeo = jiffies + (HZ / 2); /* FIXME */
1003 spin_lock(chip->mutex);
1007 if (chip_ready(map, adr))
1010 if (time_after(jiffies, timeo)) {
1011 xip_enable(map, chip, adr);
1012 printk(KERN_WARNING "MTD %s(): software timeout\n", __func__);
1013 xip_disable(map, chip, adr);
1017 /* Latency issues. Drop the lock, wait a while and retry */
1018 UDELAY(map, chip, adr, 1);
1020 /* Did we succeed? */
1021 if (!chip_good(map, adr, datum)) {
1022 /* reset on all failures. */
1023 map_write( map, CMD(0xF0), chip->start );
1024 /* FIXME - should have reset delay before continuing */
1026 if (++retry_cnt <= MAX_WORD_RETRIES)
1031 xip_enable(map, chip, adr);
1033 chip->state = FL_READY;
1034 put_chip(map, chip, adr);
1035 spin_unlock(chip->mutex);
1041 static int cfi_amdstd_write_words(struct mtd_info *mtd, loff_t to, size_t len,
1042 size_t *retlen, const u_char *buf)
1044 struct map_info *map = mtd->priv;
1045 struct cfi_private *cfi = map->fldrv_priv;
1048 unsigned long ofs, chipstart;
1049 DECLARE_WAITQUEUE(wait, current);
1055 chipnum = to >> cfi->chipshift;
1056 ofs = to - (chipnum << cfi->chipshift);
1057 chipstart = cfi->chips[chipnum].start;
1059 /* If it's not bus-aligned, do the first byte write */
1060 if (ofs & (map_bankwidth(map)-1)) {
1061 unsigned long bus_ofs = ofs & ~(map_bankwidth(map)-1);
1062 int i = ofs - bus_ofs;
1067 spin_lock(cfi->chips[chipnum].mutex);
1069 if (cfi->chips[chipnum].state != FL_READY) {
1071 printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
1073 set_current_state(TASK_UNINTERRUPTIBLE);
1074 add_wait_queue(&cfi->chips[chipnum].wq, &wait);
1076 spin_unlock(cfi->chips[chipnum].mutex);
1079 remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
1081 if(signal_pending(current))
1087 /* Load 'tmp_buf' with old contents of flash */
1088 tmp_buf = map_read(map, bus_ofs+chipstart);
1090 spin_unlock(cfi->chips[chipnum].mutex);
1092 /* Number of bytes to copy from buffer */
1093 n = min_t(int, len, map_bankwidth(map)-i);
1095 tmp_buf = map_word_load_partial(map, tmp_buf, buf, i, n);
1097 ret = do_write_oneword(map, &cfi->chips[chipnum],
1107 if (ofs >> cfi->chipshift) {
1110 if (chipnum == cfi->numchips)
1115 /* We are now aligned, write as much as possible */
1116 while(len >= map_bankwidth(map)) {
1119 datum = map_word_load(map, buf);
1121 ret = do_write_oneword(map, &cfi->chips[chipnum],
1126 ofs += map_bankwidth(map);
1127 buf += map_bankwidth(map);
1128 (*retlen) += map_bankwidth(map);
1129 len -= map_bankwidth(map);
1131 if (ofs >> cfi->chipshift) {
1134 if (chipnum == cfi->numchips)
1136 chipstart = cfi->chips[chipnum].start;
1140 /* Write the trailing bytes if any */
1141 if (len & (map_bankwidth(map)-1)) {
1145 spin_lock(cfi->chips[chipnum].mutex);
1147 if (cfi->chips[chipnum].state != FL_READY) {
1149 printk(KERN_DEBUG "Waiting for chip to write, status = %d\n", cfi->chips[chipnum].state);
1151 set_current_state(TASK_UNINTERRUPTIBLE);
1152 add_wait_queue(&cfi->chips[chipnum].wq, &wait);
1154 spin_unlock(cfi->chips[chipnum].mutex);
1157 remove_wait_queue(&cfi->chips[chipnum].wq, &wait);
1159 if(signal_pending(current))
1165 tmp_buf = map_read(map, ofs + chipstart);
1167 spin_unlock(cfi->chips[chipnum].mutex);
1169 tmp_buf = map_word_load_partial(map, tmp_buf, buf, 0, len);
1171 ret = do_write_oneword(map, &cfi->chips[chipnum],
1184 * FIXME: interleaved mode not tested, and probably not supported!
1186 static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
1187 unsigned long adr, const u_char *buf,
1190 struct cfi_private *cfi = map->fldrv_priv;
1191 unsigned long timeo = jiffies + HZ;
1192 /* see comments in do_write_oneword() regarding uWriteTimeo. */
1193 unsigned long uWriteTimeout = ( HZ / 1000 ) + 1;
1195 unsigned long cmd_adr;
1202 spin_lock(chip->mutex);
1203 ret = get_chip(map, chip, adr, FL_WRITING);
1205 spin_unlock(chip->mutex);
1209 datum = map_word_load(map, buf);
1211 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): WRITE 0x%.8lx(0x%.8lx)\n",
1212 __func__, adr, datum.x[0] );
1214 XIP_INVAL_CACHED_RANGE(map, adr, len);
1216 xip_disable(map, chip, cmd_adr);
1218 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1219 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1220 //cfi_send_gen_cmd(0xA0, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1222 /* Write Buffer Load */
1223 map_write(map, CMD(0x25), cmd_adr);
1225 chip->state = FL_WRITING_TO_BUFFER;
1227 /* Write length of data to come */
1228 words = len / map_bankwidth(map);
1229 map_write(map, CMD(words - 1), cmd_adr);
1232 while(z < words * map_bankwidth(map)) {
1233 datum = map_word_load(map, buf);
1234 map_write(map, datum, adr + z);
1236 z += map_bankwidth(map);
1237 buf += map_bankwidth(map);
1239 z -= map_bankwidth(map);
1243 /* Write Buffer Program Confirm: GO GO GO */
1244 map_write(map, CMD(0x29), cmd_adr);
1245 chip->state = FL_WRITING;
1247 INVALIDATE_CACHE_UDELAY(map, chip,
1248 adr, map_bankwidth(map),
1249 chip->word_write_time);
1251 timeo = jiffies + uWriteTimeout;
1254 if (chip->state != FL_WRITING) {
1255 /* Someone's suspended the write. Sleep */
1256 DECLARE_WAITQUEUE(wait, current);
1258 set_current_state(TASK_UNINTERRUPTIBLE);
1259 add_wait_queue(&chip->wq, &wait);
1260 spin_unlock(chip->mutex);
1262 remove_wait_queue(&chip->wq, &wait);
1263 timeo = jiffies + (HZ / 2); /* FIXME */
1264 spin_lock(chip->mutex);
1268 if (chip_ready(map, adr)) {
1269 xip_enable(map, chip, adr);
1273 if( time_after(jiffies, timeo))
1276 /* Latency issues. Drop the lock, wait a while and retry */
1277 UDELAY(map, chip, adr, 1);
1280 /* reset on all failures. */
1281 map_write( map, CMD(0xF0), chip->start );
1282 xip_enable(map, chip, adr);
1283 /* FIXME - should have reset delay before continuing */
1285 printk(KERN_WARNING "MTD %s(): software timeout\n",
1290 chip->state = FL_READY;
1291 put_chip(map, chip, adr);
1292 spin_unlock(chip->mutex);
1298 static int cfi_amdstd_write_buffers(struct mtd_info *mtd, loff_t to, size_t len,
1299 size_t *retlen, const u_char *buf)
1301 struct map_info *map = mtd->priv;
1302 struct cfi_private *cfi = map->fldrv_priv;
1303 int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
1312 chipnum = to >> cfi->chipshift;
1313 ofs = to - (chipnum << cfi->chipshift);
1315 /* If it's not bus-aligned, do the first word write */
1316 if (ofs & (map_bankwidth(map)-1)) {
1317 size_t local_len = (-ofs)&(map_bankwidth(map)-1);
1318 if (local_len > len)
1320 ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
1321 local_len, retlen, buf);
1328 if (ofs >> cfi->chipshift) {
1331 if (chipnum == cfi->numchips)
1336 /* Write buffer is worth it only if more than one word to write... */
1337 while (len >= map_bankwidth(map) * 2) {
1338 /* We must not cross write block boundaries */
1339 int size = wbufsize - (ofs & (wbufsize-1));
1343 if (size % map_bankwidth(map))
1344 size -= size % map_bankwidth(map);
1346 ret = do_write_buffer(map, &cfi->chips[chipnum],
1356 if (ofs >> cfi->chipshift) {
1359 if (chipnum == cfi->numchips)
1365 size_t retlen_dregs = 0;
1367 ret = cfi_amdstd_write_words(mtd, ofs + (chipnum<<cfi->chipshift),
1368 len, &retlen_dregs, buf);
1370 *retlen += retlen_dregs;
1379 * Handle devices with one erase region, that only implement
1380 * the chip erase command.
1382 static int __xipram do_erase_chip(struct map_info *map, struct flchip *chip)
1384 struct cfi_private *cfi = map->fldrv_priv;
1385 unsigned long timeo = jiffies + HZ;
1386 unsigned long int adr;
1387 DECLARE_WAITQUEUE(wait, current);
1390 adr = cfi->addr_unlock1;
1392 spin_lock(chip->mutex);
1393 ret = get_chip(map, chip, adr, FL_WRITING);
1395 spin_unlock(chip->mutex);
1399 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
1400 __func__, chip->start );
1402 XIP_INVAL_CACHED_RANGE(map, adr, map->size);
1404 xip_disable(map, chip, adr);
1406 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1407 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1408 cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1409 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1410 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1411 cfi_send_gen_cmd(0x10, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1413 chip->state = FL_ERASING;
1414 chip->erase_suspended = 0;
1415 chip->in_progress_block_addr = adr;
1417 INVALIDATE_CACHE_UDELAY(map, chip,
1419 chip->erase_time*500);
1421 timeo = jiffies + (HZ*20);
1424 if (chip->state != FL_ERASING) {
1425 /* Someone's suspended the erase. Sleep */
1426 set_current_state(TASK_UNINTERRUPTIBLE);
1427 add_wait_queue(&chip->wq, &wait);
1428 spin_unlock(chip->mutex);
1430 remove_wait_queue(&chip->wq, &wait);
1431 spin_lock(chip->mutex);
1434 if (chip->erase_suspended) {
1435 /* This erase was suspended and resumed.
1436 Adjust the timeout */
1437 timeo = jiffies + (HZ*20); /* FIXME */
1438 chip->erase_suspended = 0;
1441 if (chip_ready(map, adr))
1444 if (time_after(jiffies, timeo)) {
1445 printk(KERN_WARNING "MTD %s(): software timeout\n",
1450 /* Latency issues. Drop the lock, wait a while and retry */
1451 UDELAY(map, chip, adr, 1000000/HZ);
1453 /* Did we succeed? */
1454 if (!chip_good(map, adr, map_word_ff(map))) {
1455 /* reset on all failures. */
1456 map_write( map, CMD(0xF0), chip->start );
1457 /* FIXME - should have reset delay before continuing */
1462 chip->state = FL_READY;
1463 xip_enable(map, chip, adr);
1464 put_chip(map, chip, adr);
1465 spin_unlock(chip->mutex);
1471 static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip, unsigned long adr, int len, void *thunk)
1473 struct cfi_private *cfi = map->fldrv_priv;
1474 unsigned long timeo = jiffies + HZ;
1475 DECLARE_WAITQUEUE(wait, current);
1480 spin_lock(chip->mutex);
1481 ret = get_chip(map, chip, adr, FL_ERASING);
1483 spin_unlock(chip->mutex);
1487 DEBUG( MTD_DEBUG_LEVEL3, "MTD %s(): ERASE 0x%.8lx\n",
1490 XIP_INVAL_CACHED_RANGE(map, adr, len);
1492 xip_disable(map, chip, adr);
1494 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1495 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1496 cfi_send_gen_cmd(0x80, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1497 cfi_send_gen_cmd(0xAA, cfi->addr_unlock1, chip->start, map, cfi, cfi->device_type, NULL);
1498 cfi_send_gen_cmd(0x55, cfi->addr_unlock2, chip->start, map, cfi, cfi->device_type, NULL);
1499 map_write(map, CMD(0x30), adr);
1501 chip->state = FL_ERASING;
1502 chip->erase_suspended = 0;
1503 chip->in_progress_block_addr = adr;
1505 INVALIDATE_CACHE_UDELAY(map, chip,
1507 chip->erase_time*500);
1509 timeo = jiffies + (HZ*20);
1512 if (chip->state != FL_ERASING) {
1513 /* Someone's suspended the erase. Sleep */
1514 set_current_state(TASK_UNINTERRUPTIBLE);
1515 add_wait_queue(&chip->wq, &wait);
1516 spin_unlock(chip->mutex);
1518 remove_wait_queue(&chip->wq, &wait);
1519 spin_lock(chip->mutex);
1522 if (chip->erase_suspended) {
1523 /* This erase was suspended and resumed.
1524 Adjust the timeout */
1525 timeo = jiffies + (HZ*20); /* FIXME */
1526 chip->erase_suspended = 0;
1529 if (chip_ready(map, adr)) {
1530 xip_enable(map, chip, adr);
1534 if (time_after(jiffies, timeo)) {
1535 xip_enable(map, chip, adr);
1536 printk(KERN_WARNING "MTD %s(): software timeout\n",
1541 /* Latency issues. Drop the lock, wait a while and retry */
1542 UDELAY(map, chip, adr, 1000000/HZ);
1544 /* Did we succeed? */
1545 if (!chip_good(map, adr, map_word_ff(map))) {
1546 /* reset on all failures. */
1547 map_write( map, CMD(0xF0), chip->start );
1548 /* FIXME - should have reset delay before continuing */
1553 chip->state = FL_READY;
1554 put_chip(map, chip, adr);
1555 spin_unlock(chip->mutex);
1560 int cfi_amdstd_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
1562 unsigned long ofs, len;
1568 ret = cfi_varsize_frob(mtd, do_erase_oneblock, ofs, len, NULL);
1572 instr->state = MTD_ERASE_DONE;
1573 mtd_erase_callback(instr);
1579 static int cfi_amdstd_erase_chip(struct mtd_info *mtd, struct erase_info *instr)
1581 struct map_info *map = mtd->priv;
1582 struct cfi_private *cfi = map->fldrv_priv;
1585 if (instr->addr != 0)
1588 if (instr->len != mtd->size)
1591 ret = do_erase_chip(map, &cfi->chips[0]);
1595 instr->state = MTD_ERASE_DONE;
1596 mtd_erase_callback(instr);
1602 static void cfi_amdstd_sync (struct mtd_info *mtd)
1604 struct map_info *map = mtd->priv;
1605 struct cfi_private *cfi = map->fldrv_priv;
1607 struct flchip *chip;
1609 DECLARE_WAITQUEUE(wait, current);
1611 for (i=0; !ret && i<cfi->numchips; i++) {
1612 chip = &cfi->chips[i];
1615 spin_lock(chip->mutex);
1617 switch(chip->state) {
1621 case FL_JEDEC_QUERY:
1622 chip->oldstate = chip->state;
1623 chip->state = FL_SYNCING;
1624 /* No need to wake_up() on this state change -
1625 * as the whole point is that nobody can do anything
1626 * with the chip now anyway.
1629 spin_unlock(chip->mutex);
1633 /* Not an idle state */
1634 add_wait_queue(&chip->wq, &wait);
1636 spin_unlock(chip->mutex);
1640 remove_wait_queue(&chip->wq, &wait);
1646 /* Unlock the chips again */
1648 for (i--; i >=0; i--) {
1649 chip = &cfi->chips[i];
1651 spin_lock(chip->mutex);
1653 if (chip->state == FL_SYNCING) {
1654 chip->state = chip->oldstate;
1657 spin_unlock(chip->mutex);
1662 static int cfi_amdstd_suspend(struct mtd_info *mtd)
1664 struct map_info *map = mtd->priv;
1665 struct cfi_private *cfi = map->fldrv_priv;
1667 struct flchip *chip;
1670 for (i=0; !ret && i<cfi->numchips; i++) {
1671 chip = &cfi->chips[i];
1673 spin_lock(chip->mutex);
1675 switch(chip->state) {
1679 case FL_JEDEC_QUERY:
1680 chip->oldstate = chip->state;
1681 chip->state = FL_PM_SUSPENDED;
1682 /* No need to wake_up() on this state change -
1683 * as the whole point is that nobody can do anything
1684 * with the chip now anyway.
1686 case FL_PM_SUSPENDED:
1693 spin_unlock(chip->mutex);
1696 /* Unlock the chips again */
1699 for (i--; i >=0; i--) {
1700 chip = &cfi->chips[i];
1702 spin_lock(chip->mutex);
1704 if (chip->state == FL_PM_SUSPENDED) {
1705 chip->state = chip->oldstate;
1708 spin_unlock(chip->mutex);
1716 static void cfi_amdstd_resume(struct mtd_info *mtd)
1718 struct map_info *map = mtd->priv;
1719 struct cfi_private *cfi = map->fldrv_priv;
1721 struct flchip *chip;
1723 for (i=0; i<cfi->numchips; i++) {
1725 chip = &cfi->chips[i];
1727 spin_lock(chip->mutex);
1729 if (chip->state == FL_PM_SUSPENDED) {
1730 chip->state = FL_READY;
1731 map_write(map, CMD(0xF0), chip->start);
1735 printk(KERN_ERR "Argh. Chip not in PM_SUSPENDED state upon resume()\n");
1737 spin_unlock(chip->mutex);
1741 static void cfi_amdstd_destroy(struct mtd_info *mtd)
1743 struct map_info *map = mtd->priv;
1744 struct cfi_private *cfi = map->fldrv_priv;
1745 kfree(cfi->cmdset_priv);
1748 kfree(mtd->eraseregions);
1751 static char im_name[]="cfi_cmdset_0002";
1754 static int __init cfi_amdstd_init(void)
1756 inter_module_register(im_name, THIS_MODULE, &cfi_cmdset_0002);
1761 static void __exit cfi_amdstd_exit(void)
1763 inter_module_unregister(im_name);
1767 module_init(cfi_amdstd_init);
1768 module_exit(cfi_amdstd_exit);
1770 MODULE_LICENSE("GPL");
1771 MODULE_AUTHOR("Crossnet Co. <info@crossnet.co.jp> et al.");
1772 MODULE_DESCRIPTION("MTD chip driver for AMD/Fujitsu flash chips");