1 files changed, 290 insertions, 197 deletions

diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c
index 0cfcd88468e0..143f01a4c170 100644
--- a/drivers/mtd/chips/cfi_cmdset_0001.c
+++ b/drivers/mtd/chips/cfi_cmdset_0001.c
@@ -4,9 +4,9 @@
  *
  * (C) 2000 Red Hat. GPL'd
  *
- * $Id: cfi_cmdset_0001.c,v 1.178 2005/05/19 17:05:43 nico Exp $
+ * $Id: cfi_cmdset_0001.c,v 1.185 2005/11/07 11:14:22 gleixner Exp $
+ *
  *
- * 
  * 10/10/2000	Nicolas Pitre <nico@cam.org>
  * 	- completely revamped method functions so they are aware and
  * 	  independent of the flash geometry (buswidth, interleave, etc.)
@@ -51,6 +51,7 @@
 static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
 static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
 static int cfi_intelext_write_buffers(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
+static int cfi_intelext_writev(struct mtd_info *, const struct kvec *, unsigned long, loff_t, size_t *);
 static int cfi_intelext_erase_varsize(struct mtd_info *, struct erase_info *);
 static void cfi_intelext_sync (struct mtd_info *);
 static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len);
@@ -105,6 +106,7 @@ static struct mtd_chip_driver cfi_intelext_chipdrv = {
 static void cfi_tell_features(struct cfi_pri_intelext *extp)
 {
 	int i;
+	printk("  Extended Query version %c.%c\n", extp->MajorVersion, extp->MinorVersion);
 	printk("  Feature/Command Support:      %4.4X\n", extp->FeatureSupport);
 	printk("     - Chip Erase:              %s\n", extp->FeatureSupport&1?"supported":"unsupported");
 	printk("     - Suspend Erase:           %s\n", extp->FeatureSupport&2?"supported":"unsupported");
@@ -116,36 +118,43 @@ static void cfi_tell_features(struct cfi_pri_intelext *extp)
 	printk("     - Page-mode read:          %s\n", extp->FeatureSupport&128?"supported":"unsupported");
 	printk("     - Synchronous read:        %s\n", extp->FeatureSupport&256?"supported":"unsupported");
 	printk("     - Simultaneous operations: %s\n", extp->FeatureSupport&512?"supported":"unsupported");
-	for (i=10; i<32; i++) {
-		if (extp->FeatureSupport & (1<<i)) 
+	printk("     - Extended Flash Array:    %s\n", extp->FeatureSupport&1024?"supported":"unsupported");
+	for (i=11; i<32; i++) {
+		if (extp->FeatureSupport & (1<<i))
 			printk("     - Unknown Bit %X:      supported\n", i);
 	}
-	
+
 	printk("  Supported functions after Suspend: %2.2X\n", extp->SuspendCmdSupport);
 	printk("     - Program after Erase Suspend: %s\n", extp->SuspendCmdSupport&1?"supported":"unsupported");
 	for (i=1; i<8; i++) {
 		if (extp->SuspendCmdSupport & (1<<i))
 			printk("     - Unknown Bit %X:               supported\n", i);
 	}
-	
+
 	printk("  Block Status Register Mask: %4.4X\n", extp->BlkStatusRegMask);
 	printk("     - Lock Bit Active:      %s\n", extp->BlkStatusRegMask&1?"yes":"no");
-	printk("     - Valid Bit Active:     %s\n", extp->BlkStatusRegMask&2?"yes":"no");
-	for (i=2; i<16; i++) {
+	printk("     - Lock-Down Bit Active: %s\n", extp->BlkStatusRegMask&2?"yes":"no");
+	for (i=2; i<3; i++) {
 		if (extp->BlkStatusRegMask & (1<<i))
 			printk("     - Unknown Bit %X Active: yes\n",i);
 	}
-	
-	printk("  Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+	printk("     - EFA Lock Bit:         %s\n", extp->BlkStatusRegMask&16?"yes":"no");
+	printk("     - EFA Lock-Down Bit:    %s\n", extp->BlkStatusRegMask&32?"yes":"no");
+	for (i=6; i<16; i++) {
+		if (extp->BlkStatusRegMask & (1<<i))
+			printk("     - Unknown Bit %X Active: yes\n",i);
+	}
+
+	printk("  Vcc Logic Supply Optimum Program/Erase Voltage: %d.%d V\n",
 	       extp->VccOptimal >> 4, extp->VccOptimal & 0xf);
 	if (extp->VppOptimal)
-		printk("  Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n", 
+		printk("  Vpp Programming Supply Optimum Program/Erase Voltage: %d.%d V\n",
 		       extp->VppOptimal >> 4, extp->VppOptimal & 0xf);
 }
 #endif
 
 #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
-/* Some Intel Strata Flash prior to FPO revision C has bugs in this area */ 
+/* Some Intel Strata Flash prior to FPO revision C has bugs in this area */
 static void fixup_intel_strataflash(struct mtd_info *mtd, void* param)
 {
 	struct map_info *map = mtd->priv;
@@ -176,7 +185,7 @@ static void fixup_st_m28w320ct(struct mtd_info *mtd, void* param)
 {
 	struct map_info *map = mtd->priv;
 	struct cfi_private *cfi = map->fldrv_priv;
-	
+
 	cfi->cfiq->BufWriteTimeoutTyp = 0;	/* Not supported */
 	cfi->cfiq->BufWriteTimeoutMax = 0;	/* Not supported */
 }
@@ -185,7 +194,7 @@ static void fixup_st_m28w320cb(struct mtd_info *mtd, void* param)
 {
 	struct map_info *map = mtd->priv;
 	struct cfi_private *cfi = map->fldrv_priv;
-	
+
 	/* Note this is done after the region info is endian swapped */
 	cfi->cfiq->EraseRegionInfo[1] =
 		(cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e;
@@ -207,12 +216,13 @@ static void fixup_use_write_buffers(struct mtd_info *mtd, void *param)
 	if (cfi->cfiq->BufWriteTimeoutTyp) {
 		printk(KERN_INFO "Using buffer write method\n" );
 		mtd->write = cfi_intelext_write_buffers;
+		mtd->writev = cfi_intelext_writev;
 	}
 }
 
 static struct cfi_fixup cfi_fixup_table[] = {
 #ifdef CMDSET0001_DISABLE_ERASE_SUSPEND_ON_WRITE
-	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL }, 
+	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_intel_strataflash, NULL },
 #endif
 #ifdef CMDSET0001_DISABLE_WRITE_SUSPEND
 	{ CFI_MFR_ANY, CFI_ID_ANY, fixup_no_write_suspend, NULL },
@@ -252,12 +262,21 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 	if (!extp)
 		return NULL;
 
+	if (extp->MajorVersion != '1' ||
+	    (extp->MinorVersion < '0' || extp->MinorVersion > '4')) {
+		printk(KERN_ERR "  Unknown Intel/Sharp Extended Query "
+		       "version %c.%c.\n",  extp->MajorVersion,
+		       extp->MinorVersion);
+		kfree(extp);
+		return NULL;
+	}
+
 	/* Do some byteswapping if necessary */
 	extp->FeatureSupport = le32_to_cpu(extp->FeatureSupport);
 	extp->BlkStatusRegMask = le16_to_cpu(extp->BlkStatusRegMask);
 	extp->ProtRegAddr = le16_to_cpu(extp->ProtRegAddr);
 
-	if (extp->MajorVersion == '1' && extp->MinorVersion == '3') {
+	if (extp->MajorVersion == '1' && extp->MinorVersion >= '3') {
 		unsigned int extra_size = 0;
 		int nb_parts, i;
 
@@ -266,7 +285,10 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 			      sizeof(struct cfi_intelext_otpinfo);
 
 		/* Burst Read info */
-		extra_size += 6;
+		extra_size += 2;
+		if (extp_size < sizeof(*extp) + extra_size)
+			goto need_more;
+		extra_size += extp->extra[extra_size-1];
 
 		/* Number of hardware-partitions */
 		extra_size += 1;
@@ -274,6 +296,10 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 			goto need_more;
 		nb_parts = extp->extra[extra_size - 1];
 
+		/* skip the sizeof(partregion) field in CFI 1.4 */
+		if (extp->MinorVersion >= '4')
+			extra_size += 2;
+
 		for (i = 0; i < nb_parts; i++) {
 			struct cfi_intelext_regioninfo *rinfo;
 			rinfo = (struct cfi_intelext_regioninfo *)&extp->extra[extra_size];
@@ -285,6 +311,9 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 				      * sizeof(struct cfi_intelext_blockinfo);
 		}
 
+		if (extp->MinorVersion >= '4')
+			extra_size += sizeof(struct cfi_intelext_programming_regioninfo);
+
 		if (extp_size < sizeof(*extp) + extra_size) {
 			need_more:
 			extp_size = sizeof(*extp) + extra_size;
@@ -298,7 +327,7 @@ read_pri_intelext(struct map_info *map, __u16 adr)
 			goto again;
 		}
 	}
-		
+
 	return extp;
 }
 
@@ -339,7 +368,7 @@ struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
 	mtd->reboot_notifier.notifier_call = cfi_intelext_reboot;
 
 	if (cfi->cfi_mode == CFI_MODE_CFI) {
-		/* 
+		/*
 		 * It's a real CFI chip, not one for which the probe
 		 * routine faked a CFI structure. So we read the feature
 		 * table from it.
@@ -354,14 +383,14 @@ struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
 		}
 
 		/* Install our own private info structure */
-		cfi->cmdset_priv = extp;	
+		cfi->cmdset_priv = extp;
 
 		cfi_fixup(mtd, cfi_fixup_table);
 
 #ifdef DEBUG_CFI_FEATURES
 		/* Tell the user about it in lots of lovely detail */
 		cfi_tell_features(extp);
-#endif	
+#endif
 
 		if(extp->SuspendCmdSupport & 1) {
 			printk(KERN_NOTICE "cfi_cmdset_0001: Erase suspend on write enabled\n");
@@ -379,10 +408,10 @@ struct mtd_info *cfi_cmdset_0001(struct map_info *map, int primary)
 		cfi->chips[i].buffer_write_time = 1<<cfi->cfiq->BufWriteTimeoutTyp;
 		cfi->chips[i].erase_time = 1<<cfi->cfiq->BlockEraseTimeoutTyp;
 		cfi->chips[i].ref_point_counter = 0;
-	}		
+	}
 
 	map->fldrv = &cfi_intelext_chipdrv;
-	
+
 	return cfi_intelext_setup(mtd);
 }
 
@@ -399,13 +428,13 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
 	mtd->size = devsize * cfi->numchips;
 
 	mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips;
-	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) 
+	mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info)
 			* mtd->numeraseregions, GFP_KERNEL);
-	if (!mtd->eraseregions) { 
+	if (!mtd->eraseregions) {
 		printk(KERN_ERR "Failed to allocate memory for MTD erase region info\n");
 		goto setup_err;
 	}
-	
+
 	for (i=0; i<cfi->cfiq->NumEraseRegions; i++) {
 		unsigned long ernum, ersize;
 		ersize = ((cfi->cfiq->EraseRegionInfo[i] >> 8) & ~0xff) * cfi->interleave;
@@ -429,7 +458,7 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
 	}
 
 	for (i=0; i<mtd->numeraseregions;i++){
-		printk(KERN_DEBUG "%d: offset=0x%x,size=0x%x,blocks=%d\n",
+		printk(KERN_DEBUG "erase region %d: offset=0x%x,size=0x%x,blocks=%d\n",
 		       i,mtd->eraseregions[i].offset,
 		       mtd->eraseregions[i].erasesize,
 		       mtd->eraseregions[i].numblocks);
@@ -455,8 +484,7 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd)
 
  setup_err:
 	if(mtd) {
-		if(mtd->eraseregions)
-			kfree(mtd->eraseregions);
+		kfree(mtd->eraseregions);
 		kfree(mtd);
 	}
 	kfree(cfi->cmdset_priv);
@@ -481,7 +509,7 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
 	 * arrangement at this point. This can be rearranged in the future
 	 * if someone feels motivated enough.  --nico
 	 */
-	if (extp && extp->MajorVersion == '1' && extp->MinorVersion == '3'
+	if (extp && extp->MajorVersion == '1' && extp->MinorVersion >= '3'
 	    && extp->FeatureSupport & (1 << 9)) {
 		struct cfi_private *newcfi;
 		struct flchip *chip;
@@ -493,12 +521,16 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
 		       sizeof(struct cfi_intelext_otpinfo);
 
 		/* Burst Read info */
-		offs += 6;
+		offs += extp->extra[offs+1]+2;
 
 		/* Number of partition regions */
 		numregions = extp->extra[offs];
 		offs += 1;
 
+		/* skip the sizeof(partregion) field in CFI 1.4 */
+		if (extp->MinorVersion >= '4')
+			offs += 2;
+
 		/* Number of hardware partitions */
 		numparts = 0;
 		for (i = 0; i < numregions; i++) {
@@ -510,6 +542,20 @@ static int cfi_intelext_partition_fixup(struct mtd_info *mtd,
 				  sizeof(struct cfi_intelext_blockinfo);
 		}
 
+		/* Programming Region info */
+		if (extp->MinorVersion >= '4') {
+			struct cfi_intelext_programming_regioninfo *prinfo;
+			prinfo = (struct cfi_intelext_programming_regioninfo *)&extp->extra[offs];
+			MTD_PROGREGION_SIZE(mtd) = cfi->interleave << prinfo->ProgRegShift;
+			MTD_PROGREGION_CTRLMODE_VALID(mtd) = cfi->interleave * prinfo->ControlValid;
+			MTD_PROGREGION_CTRLMODE_INVALID(mtd) = cfi->interleave * prinfo->ControlInvalid;
+			mtd->flags |= MTD_PROGRAM_REGIONS;
+			printk(KERN_DEBUG "%s: program region size/ctrl_valid/ctrl_inval = %d/%d/%d\n",
+			       map->name, MTD_PROGREGION_SIZE(mtd),
+			       MTD_PROGREGION_CTRLMODE_VALID(mtd),
+			       MTD_PROGREGION_CTRLMODE_INVALID(mtd));
+		}
+
 		/*
 		 * All functions below currently rely on all chips having
 		 * the same geometry so we'll just assume that all hardware
@@ -654,8 +700,8 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
 				break;
 
 			if (time_after(jiffies, timeo)) {
-				printk(KERN_ERR "Waiting for chip to be ready timed out. Status %lx\n", 
-				       status.x[0]);
+				printk(KERN_ERR "%s: Waiting for chip to be ready timed out. Status %lx\n",
+				       map->name, status.x[0]);
 				return -EIO;
 			}
 			spin_unlock(chip->mutex);
@@ -664,7 +710,7 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
 			/* Someone else might have been playing with it. */
 			goto retry;
 		}
-				
+
 	case FL_READY:
 	case FL_CFI_QUERY:
 	case FL_JEDEC_QUERY:
@@ -702,8 +748,8 @@ static int get_chip(struct map_info *map, struct flchip *chip, unsigned long adr
 				map_write(map, CMD(0x70), adr);
 				chip->state = FL_ERASING;
 				chip->oldstate = FL_READY;
-				printk(KERN_ERR "Chip not ready after erase "
-				       "suspended: status = 0x%lx\n", status.x[0]);
+				printk(KERN_ERR "%s: Chip not ready after erase "
+				       "suspended: status = 0x%lx\n", map->name, status.x[0]);
 				return -EIO;
 			}
 
@@ -783,14 +829,14 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad
 	switch(chip->oldstate) {
 	case FL_ERASING:
 		chip->state = chip->oldstate;
-		/* What if one interleaved chip has finished and the 
+		/* What if one interleaved chip has finished and the
 		   other hasn't? The old code would leave the finished
-		   one in READY mode. That's bad, and caused -EROFS 
+		   one in READY mode. That's bad, and caused -EROFS
 		   errors to be returned from do_erase_oneblock because
 		   that's the only bit it checked for at the time.
-		   As the state machine appears to explicitly allow 
+		   As the state machine appears to explicitly allow
 		   sending the 0x70 (Read Status) command to an erasing
-		   chip and expecting it to be ignored, that's what we 
+		   chip and expecting it to be ignored, that's what we
 		   do. */
 		map_write(map, CMD(0xd0), adr);
 		map_write(map, CMD(0x70), adr);
@@ -810,7 +856,7 @@ static void put_chip(struct map_info *map, struct flchip *chip, unsigned long ad
 		DISABLE_VPP(map);
 		break;
 	default:
-		printk(KERN_ERR "put_chip() called with oldstate %d!!\n", chip->oldstate);
+		printk(KERN_ERR "%s: put_chip() called with oldstate %d!!\n", map->name, chip->oldstate);
 	}
 	wake_up(&chip->wq);
 }
@@ -1026,8 +1072,8 @@ static int do_point_onechip (struct map_info *map, struct flchip *chip, loff_t a
 
 	adr += chip->start;
 
-	/* Ensure cmd read/writes are aligned. */ 
-	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+	/* Ensure cmd read/writes are aligned. */
+	cmd_addr = adr & ~(map_bankwidth(map)-1);
 
 	spin_lock(chip->mutex);
 
@@ -1055,7 +1101,7 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si
 
 	if (!map->virt || (from + len > mtd->size))
 		return -EINVAL;
-	
+
 	*mtdbuf = (void *)map->virt + from;
 	*retlen = 0;
 
@@ -1082,7 +1128,7 @@ static int cfi_intelext_point (struct mtd_info *mtd, loff_t from, size_t len, si
 
 		*retlen += thislen;
 		len -= thislen;
-		
+
 		ofs = 0;
 		chipnum++;
 	}
@@ -1121,7 +1167,7 @@ static void cfi_intelext_unpoint (struct mtd_info *mtd, u_char *addr, loff_t fro
 			if(chip->ref_point_counter == 0)
 				chip->state = FL_READY;
 		} else
-			printk(KERN_ERR "Warning: unpoint called on non pointed region\n"); /* Should this give an error? */
+			printk(KERN_ERR "%s: Warning: unpoint called on non pointed region\n", map->name); /* Should this give an error? */
 
 		put_chip(map, chip, chip->start);
 		spin_unlock(chip->mutex);
@@ -1140,8 +1186,8 @@ static inline int do_read_onechip(struct map_info *map, struct flchip *chip, lof
 
 	adr += chip->start;
 
-	/* Ensure cmd read/writes are aligned. */ 
-	cmd_addr = adr & ~(map_bankwidth(map)-1); 
+	/* Ensure cmd read/writes are aligned. */
+	cmd_addr = adr & ~(map_bankwidth(map)-1);
 
 	spin_lock(chip->mutex);
 	ret = get_chip(map, chip, cmd_addr, FL_READY);
@@ -1196,7 +1242,7 @@ static int cfi_intelext_read (struct mtd_info *mtd, loff_t from, size_t len, siz
 		*retlen += thislen;
 		len -= thislen;
 		buf += thislen;
-		
+
 		ofs = 0;
 		chipnum++;
 	}
@@ -1213,12 +1259,17 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
 
 	adr += chip->start;
 
-	/* Let's determine this according to the interleave only once */
+	/* Let's determine those according to the interleave only once */
 	status_OK = CMD(0x80);
 	switch (mode) {
-	case FL_WRITING:   write_cmd = CMD(0x40); break;
-	case FL_OTP_WRITE: write_cmd = CMD(0xc0); break;
-	default: return -EINVAL;
+	case FL_WRITING:
+		write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0x40) : CMD(0x41);
+		break;
+	case FL_OTP_WRITE:
+		write_cmd = CMD(0xc0);
+		break;
+	default:
+		return -EINVAL;
 	}
 
 	spin_lock(chip->mutex);
@@ -1259,12 +1310,13 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
 		status = map_read(map, adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
 			break;
-		
+
 		/* OK Still waiting */
 		if (time_after(jiffies, timeo)) {
+			map_write(map, CMD(0x70), adr);
 			chip->state = FL_STATUS;
 			xip_enable(map, chip, adr);
-			printk(KERN_ERR "waiting for chip to be ready timed out in word write\n");
+			printk(KERN_ERR "%s: word write error (status timeout)\n", map->name);
 			ret = -EIO;
 			goto out;
 		}
@@ -1276,27 +1328,39 @@ static int __xipram do_write_oneword(struct map_info *map, struct flchip *chip,
 	if (!z) {
 		chip->word_write_time--;
 		if (!chip->word_write_time)
-			chip->word_write_time++;
+			chip->word_write_time = 1;
 	}
-	if (z > 1) 
+	if (z > 1)
 		chip->word_write_time++;
 
 	/* Done and happy. */
 	chip->state = FL_STATUS;
 
-	/* check for lock bit */
-	if (map_word_bitsset(map, status, CMD(0x02))) {
-		/* clear status */
+	/* check for errors */
+	if (map_word_bitsset(map, status, CMD(0x1a))) {
+		unsigned long chipstatus = MERGESTATUS(status);
+
+		/* reset status */
 		map_write(map, CMD(0x50), adr);
-		/* put back into read status register mode */
 		map_write(map, CMD(0x70), adr);
-		ret = -EROFS;
+		xip_enable(map, chip, adr);
+
+		if (chipstatus & 0x02) {
+			ret = -EROFS;
+		} else if (chipstatus & 0x08) {
+			printk(KERN_ERR "%s: word write error (bad VPP)\n", map->name);
+			ret = -EIO;
+		} else {
+			printk(KERN_ERR "%s: word write error (status 0x%lx)\n", map->name, chipstatus);
+			ret = -EINVAL;
+		}
+
+		goto out;
 	}
 
 	xip_enable(map, chip, adr);
  out:	put_chip(map, chip, adr);
 	spin_unlock(chip->mutex);
-
 	return ret;
 }
 
@@ -1329,7 +1393,7 @@ static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t le
 
 		ret = do_write_oneword(map, &cfi->chips[chipnum],
 					       bus_ofs, datum, FL_WRITING);
-		if (ret) 
+		if (ret)
 			return ret;
 
 		len -= n;
@@ -1338,13 +1402,13 @@ static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t le
 		(*retlen) += n;
 
 		if (ofs >> cfi->chipshift) {
-			chipnum ++; 
+			chipnum ++;
 			ofs = 0;
 			if (chipnum == cfi->numchips)
 				return 0;
 		}
 	}
-	
+
 	while(len >= map_bankwidth(map)) {
 		map_word datum = map_word_load(map, buf);
 
@@ -1359,7 +1423,7 @@ static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t le
 		len -= map_bankwidth(map);
 
 		if (ofs >> cfi->chipshift) {
-			chipnum ++; 
+			chipnum ++;
 			ofs = 0;
 			if (chipnum == cfi->numchips)
 				return 0;
@@ -1374,9 +1438,9 @@ static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t le
 
 		ret = do_write_oneword(map, &cfi->chips[chipnum],
 				       ofs, datum, FL_WRITING);
-		if (ret) 
+		if (ret)
 			return ret;
-		
+
 		(*retlen) += len;
 	}
 
@@ -1384,20 +1448,24 @@ static int cfi_intelext_write_words (struct mtd_info *mtd, loff_t to , size_t le
 }
 
 
-static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip, 
-				    unsigned long adr, const u_char *buf, int len)
+static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
+				    unsigned long adr, const struct kvec **pvec,
+				    unsigned long *pvec_seek, int len)
 {
 	struct cfi_private *cfi = map->fldrv_priv;
-	map_word status, status_OK;
+	map_word status, status_OK, write_cmd, datum;
 	unsigned long cmd_adr, timeo;
-	int wbufsize, z, ret=0, bytes, words;
+	int wbufsize, z, ret=0, word_gap, words;
+	const struct kvec *vec;
+	unsigned long vec_seek;
 
 	wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
 	adr += chip->start;
 	cmd_adr = adr & ~(wbufsize-1);
-	
+
 	/* Let's determine this according to the interleave only once */
 	status_OK = CMD(0x80);
+	write_cmd = (cfi->cfiq->P_ID != 0x0200) ? CMD(0xe8) : CMD(0xe9);
 
 	spin_lock(chip->mutex);
 	ret = get_chip(map, chip, cmd_adr, FL_WRITING);
@@ -1411,7 +1479,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 	xip_disable(map, chip, cmd_adr);
 
 	/* �4.8 of the 28FxxxJ3A datasheet says "Any time SR.4 and/or SR.5 is set
-	   [...], the device will not accept any more Write to Buffer commands". 
+	   [...], the device will not accept any more Write to Buffer commands".
 	   So we must check here and reset those bits if they're set. Otherwise
 	   we're just pissing in the wind */
 	if (chip->state != FL_STATUS)
@@ -1429,7 +1497,7 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 
 	z = 0;
 	for (;;) {
-		map_write(map, CMD(0xe8), cmd_adr);
+		map_write(map, write_cmd, cmd_adr);
 
 		status = map_read(map, cmd_adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
@@ -1447,41 +1515,66 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 			map_write(map, CMD(0x50), cmd_adr);
 			map_write(map, CMD(0x70), cmd_adr);
 			xip_enable(map, chip, cmd_adr);
-			printk(KERN_ERR "Chip not ready for buffer write. status = %lx, Xstatus = %lx\n",
-			       status.x[0], Xstatus.x[0]);
+			printk(KERN_ERR "%s: Chip not ready for buffer write. status = %lx, Xstatus = %lx\n",
+			       map->name, status.x[0], Xstatus.x[0]);
 			ret = -EIO;
 			goto out;
 		}
 	}
 
+	/* Figure out the number of words to write */
+	word_gap = (-adr & (map_bankwidth(map)-1));
+	words = (len - word_gap + map_bankwidth(map) - 1) / map_bankwidth(map);
+	if (!word_gap) {
+		words--;
+	} else {
+		word_gap = map_bankwidth(map) - word_gap;
+		adr -= word_gap;
+		datum = map_word_ff(map);
+	}
+
 	/* Write length of data to come */
-	bytes = len & (map_bankwidth(map)-1);
-	words = len / map_bankwidth(map);
-	map_write(map, CMD(words - !bytes), cmd_adr );
+	map_write(map, CMD(words), cmd_adr );
 
 	/* Write data */
-	z = 0;
-	while(z < words * map_bankwidth(map)) {
-		map_word datum = map_word_load(map, buf);
-		map_write(map, datum, adr+z);
+	vec = *pvec;
+	vec_seek = *pvec_seek;
+	do {
+		int n = map_bankwidth(map) - word_gap;
+		if (n > vec->iov_len - vec_seek)
+			n = vec->iov_len - vec_seek;
+		if (n > len)
+			n = len;
 
-		z += map_bankwidth(map);
-		buf += map_bankwidth(map);
-	}
+		if (!word_gap && len < map_bankwidth(map))
+			datum = map_word_ff(map);
 
-	if (bytes) {
-		map_word datum;
+		datum = map_word_load_partial(map, datum,
+					      vec->iov_base + vec_seek,
+					      word_gap, n);
 
-		datum = map_word_ff(map);
-		datum = map_word_load_partial(map, datum, buf, 0, bytes);
-		map_write(map, datum, adr+z);
-	}
+		len -= n;
+		word_gap += n;
+		if (!len || word_gap == map_bankwidth(map)) {
+			map_write(map, datum, adr);
+			adr += map_bankwidth(map);
+			word_gap = 0;
+		}
+
+		vec_seek += n;
+		if (vec_seek == vec->iov_len) {
+			vec++;
+			vec_seek = 0;
+		}
+	} while (len);
+	*pvec = vec;
+	*pvec_seek = vec_seek;
 
 	/* GO GO GO */
 	map_write(map, CMD(0xd0), cmd_adr);
 	chip->state = FL_WRITING;
 
-	INVALIDATE_CACHE_UDELAY(map, chip, 
+	INVALIDATE_CACHE_UDELAY(map, chip,
 				cmd_adr, len,
 				chip->buffer_write_time);
 
@@ -1507,13 +1600,14 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 
 		/* OK Still waiting */
 		if (time_after(jiffies, timeo)) {
+			map_write(map, CMD(0x70), cmd_adr);
 			chip->state = FL_STATUS;
 			xip_enable(map, chip, cmd_adr);
-			printk(KERN_ERR "waiting for chip to be ready timed out in bufwrite\n");
+			printk(KERN_ERR "%s: buffer write error (status timeout)\n", map->name);
 			ret = -EIO;
 			goto out;
 		}
-		
+
 		/* Latency issues. Drop the lock, wait a while and retry */
 		z++;
 		UDELAY(map, chip, cmd_adr, 1);
@@ -1521,21 +1615,34 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 	if (!z) {
 		chip->buffer_write_time--;
 		if (!chip->buffer_write_time)
-			chip->buffer_write_time++;
+			chip->buffer_write_time = 1;
 	}
-	if (z > 1) 
+	if (z > 1)
 		chip->buffer_write_time++;
 
 	/* Done and happy. */
  	chip->state = FL_STATUS;
 
-	/* check for lock bit */
-	if (map_word_bitsset(map, status, CMD(0x02))) {
-		/* clear status */
+	/* check for errors */
+	if (map_word_bitsset(map, status, CMD(0x1a))) {
+		unsigned long chipstatus = MERGESTATUS(status);
+
+		/* reset status */
 		map_write(map, CMD(0x50), cmd_adr);
-		/* put back into read status register mode */
-		map_write(map, CMD(0x70), adr);
-		ret = -EROFS;
+		map_write(map, CMD(0x70), cmd_adr);
+		xip_enable(map, chip, cmd_adr);
+
+		if (chipstatus & 0x02) {
+			ret = -EROFS;
+		} else if (chipstatus & 0x08) {
+			printk(KERN_ERR "%s: buffer write error (bad VPP)\n", map->name);
+			ret = -EIO;
+		} else {
+			printk(KERN_ERR "%s: buffer write error (status 0x%lx)\n", map->name, chipstatus);
+			ret = -EINVAL;
+		}
+
+		goto out;
 	}
 
 	xip_enable(map, chip, cmd_adr);
@@ -1544,70 +1651,65 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
 	return ret;
 }
 
-static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to, 
-				       size_t len, size_t *retlen, const u_char *buf)
+static int cfi_intelext_writev (struct mtd_info *mtd, const struct kvec *vecs,
+				unsigned long count, loff_t to, size_t *retlen)
 {
 	struct map_info *map = mtd->priv;
 	struct cfi_private *cfi = map->fldrv_priv;
 	int wbufsize = cfi_interleave(cfi) << cfi->cfiq->MaxBufWriteSize;
 	int ret = 0;
 	int chipnum;
-	unsigned long ofs;
+	unsigned long ofs, vec_seek, i;
+	size_t len = 0;
+
+	for (i = 0; i < count; i++)
+		len += vecs[i].iov_len;
 
 	*retlen = 0;
 	if (!len)
 		return 0;
 
 	chipnum = to >> cfi->chipshift;
-	ofs = to  - (chipnum << cfi->chipshift);
-
-	/* If it's not bus-aligned, do the first word write */
-	if (ofs & (map_bankwidth(map)-1)) {
-		size_t local_len = (-ofs)&(map_bankwidth(map)-1);
-		if (local_len > len)
-			local_len = len;
-		ret = cfi_intelext_write_words(mtd, to, local_len,
-					       retlen, buf);
-		if (ret)
-			return ret;
-		ofs += local_len;
-		buf += local_len;
-		len -= local_len;
-
-		if (ofs >> cfi->chipshift) {
-			chipnum ++;
-			ofs = 0;
-			if (chipnum == cfi->numchips)
-				return 0;
-		}
-	}
+	ofs = to - (chipnum << cfi->chipshift);
+	vec_seek = 0;
 
-	while(len) {
+	do {
 		/* We must not cross write block boundaries */
 		int size = wbufsize - (ofs & (wbufsize-1));
 
 		if (size > len)
 			size = len;
-		ret = do_write_buffer(map, &cfi->chips[chipnum], 
-				      ofs, buf, size);
+		ret = do_write_buffer(map, &cfi->chips[chipnum],
+				      ofs, &vecs, &vec_seek, size);
 		if (ret)
 			return ret;
 
 		ofs += size;
-		buf += size;
 		(*retlen) += size;
 		len -= size;
 
 		if (ofs >> cfi->chipshift) {
-			chipnum ++; 
+			chipnum ++;
 			ofs = 0;
 			if (chipnum == cfi->numchips)
 				return 0;
 		}
-	}
+	} while (len);
+
 	return 0;
 }
 
+static int cfi_intelext_write_buffers (struct mtd_info *mtd, loff_t to,
+				       size_t len, size_t *retlen, const u_char *buf)
+{
+	struct kvec vec;
+
+	vec.iov_base = (void *) buf;
+	vec.iov_len = len;
+
+	return cfi_intelext_writev(mtd, &vec, 1, to, retlen);
+}
+
 static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 				      unsigned long adr, int len, void *thunk)
 {
@@ -1673,23 +1775,17 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 		status = map_read(map, adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
 			break;
-		
+
 		/* OK Still waiting */
 		if (time_after(jiffies, timeo)) {
-			map_word Xstatus;
 			map_write(map, CMD(0x70), adr);
 			chip->state = FL_STATUS;
-			Xstatus = map_read(map, adr);
-			/* Clear status bits */
-			map_write(map, CMD(0x50), adr);
-			map_write(map, CMD(0x70), adr);
 			xip_enable(map, chip, adr);
-			printk(KERN_ERR "waiting for erase at %08lx to complete timed out. status = %lx, Xstatus = %lx.\n",
-			       adr, status.x[0], Xstatus.x[0]);
+			printk(KERN_ERR "%s: block erase error: (status timeout)\n", map->name);
 			ret = -EIO;
 			goto out;
 		}
-		
+
 		/* Latency issues. Drop the lock, wait a while and retry */
 		UDELAY(map, chip, adr, 1000000/HZ);
 	}
@@ -1699,43 +1795,40 @@ static int __xipram do_erase_oneblock(struct map_info *map, struct flchip *chip,
 	chip->state = FL_STATUS;
 	status = map_read(map, adr);
 
-	/* check for lock bit */
+	/* check for errors */
 	if (map_word_bitsset(map, status, CMD(0x3a))) {
-		unsigned long chipstatus;
+		unsigned long chipstatus = MERGESTATUS(status);
 
 		/* Reset the error bits */
 		map_write(map, CMD(0x50), adr);
 		map_write(map, CMD(0x70), adr);
 		xip_enable(map, chip, adr);
 
-		chipstatus = MERGESTATUS(status);
-
 		if ((chipstatus & 0x30) == 0x30) {
-			printk(KERN_NOTICE "Chip reports improper command sequence: status 0x%lx\n", chipstatus);
-			ret = -EIO;
+			printk(KERN_ERR "%s: block erase error: (bad command sequence, status 0x%lx)\n", map->name, chipstatus);
+			ret = -EINVAL;
 		} else if (chipstatus & 0x02) {
 			/* Protection bit set */
 			ret = -EROFS;
 		} else if (chipstatus & 0x8) {
 			/* Voltage */
-			printk(KERN_WARNING "Chip reports voltage low on erase: status 0x%lx\n", chipstatus);
+			printk(KERN_ERR "%s: block erase error: (bad VPP)\n", map->name);
 			ret = -EIO;
-		} else if (chipstatus & 0x20) {
-			if (retries--) {
-				printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus);
-				timeo = jiffies + HZ;
-				put_chip(map, chip, adr);
-				spin_unlock(chip->mutex);
-				goto retry;
-			}
-			printk(KERN_DEBUG "Chip erase failed at 0x%08lx: status 0x%lx\n", adr, chipstatus);
+		} else if (chipstatus & 0x20 && retries--) {
+			printk(KERN_DEBUG "block erase failed at 0x%08lx: status 0x%lx. Retrying...\n", adr, chipstatus);
+			timeo = jiffies + HZ;
+			put_chip(map, chip, adr);
+			spin_unlock(chip->mutex);
+			goto retry;
+		} else {
+			printk(KERN_ERR "%s: block erase failed at 0x%08lx (status 0x%lx)\n", map->name, adr, chipstatus);
 			ret = -EIO;
 		}
-	} else {
-		xip_enable(map, chip, adr);
-		ret = 0;
+
+		goto out;
 	}
 
+	xip_enable(map, chip, adr);
  out:	put_chip(map, chip, adr);
 	spin_unlock(chip->mutex);
 	return ret;
@@ -1755,7 +1848,7 @@ int cfi_intelext_erase_varsize(struct mtd_info *mtd, struct erase_info *instr)
 
 	instr->state = MTD_ERASE_DONE;
 	mtd_erase_callback(instr);
-	
+
 	return 0;
 }
 
@@ -1776,7 +1869,7 @@ static void cfi_intelext_sync (struct mtd_info *mtd)
 		if (!ret) {
 			chip->oldstate = chip->state;
 			chip->state = FL_SYNCING;
-			/* No need to wake_up() on this state change - 
+			/* No need to wake_up() on this state change -
 			 * as the whole point is that nobody can do anything
 			 * with the chip now anyway.
 			 */
@@ -1790,7 +1883,7 @@ static void cfi_intelext_sync (struct mtd_info *mtd)
 		chip = &cfi->chips[i];
 
 		spin_lock(chip->mutex);
-		
+
 		if (chip->state == FL_SYNCING) {
 			chip->state = chip->oldstate;
 			chip->oldstate = FL_READY;
@@ -1847,7 +1940,7 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
 
 	ENABLE_VPP(map);
 	xip_disable(map, chip, adr);
-	
+
 	map_write(map, CMD(0x60), adr);
 	if (thunk == DO_XXLOCK_ONEBLOCK_LOCK) {
 		map_write(map, CMD(0x01), adr);
@@ -1875,25 +1968,22 @@ static int __xipram do_xxlock_oneblock(struct map_info *map, struct flchip *chip
 		status = map_read(map, adr);
 		if (map_word_andequal(map, status, status_OK, status_OK))
 			break;
-		
+
 		/* OK Still waiting */
 		if (time_after(jiffies, timeo)) {
-			map_word Xstatus;
 			map_write(map, CMD(0x70), adr);
 			chip->state = FL_STATUS;
-			Xstatus = map_read(map, adr);
 			xip_enable(map, chip, adr);
-			printk(KERN_ERR "waiting for unlock to complete timed out. status = %lx, Xstatus = %lx.\n",
-			       status.x[0], Xstatus.x[0]);
+			printk(KERN_ERR "%s: block unlock error: (status timeout)\n", map->name);
 			put_chip(map, chip, adr);
 			spin_unlock(chip->mutex);
 			return -EIO;
 		}
-		
+
 		/* Latency issues. Drop the lock, wait a while and retry */
 		UDELAY(map, chip, adr, 1);
 	}
-	
+
 	/* Done and happy. */
 	chip->state = FL_STATUS;
 	xip_enable(map, chip, adr);
@@ -1913,9 +2003,9 @@ static int cfi_intelext_lock(struct mtd_info *mtd, loff_t ofs, size_t len)
 		ofs, len, 0);
 #endif
 
-	ret = cfi_varsize_frob(mtd, do_xxlock_oneblock, 
+	ret = cfi_varsize_frob(mtd, do_xxlock_oneblock,
 		ofs, len, DO_XXLOCK_ONEBLOCK_LOCK);
-	
+
 #ifdef DEBUG_LOCK_BITS
 	printk(KERN_DEBUG "%s: lock status after, ret=%d\n",
 	       __FUNCTION__, ret);
@@ -1939,20 +2029,20 @@ static int cfi_intelext_unlock(struct mtd_info *mtd, loff_t ofs, size_t len)
 
 	ret = cfi_varsize_frob(mtd, do_xxlock_oneblock,
 					ofs, len, DO_XXLOCK_ONEBLOCK_UNLOCK);
-	
+
 #ifdef DEBUG_LOCK_BITS
 	printk(KERN_DEBUG "%s: lock status after, ret=%d\n",
 	       __FUNCTION__, ret);
-	cfi_varsize_frob(mtd, do_printlockstatus_oneblock, 
+	cfi_varsize_frob(mtd, do_printlockstatus_oneblock,
 		ofs, len, 0);
 #endif
-	
+
 	return ret;
 }
 
 #ifdef CONFIG_MTD_OTP
 
-typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip, 
+typedef int (*otp_op_t)(struct map_info *map, struct flchip *chip,
 			u_long data_offset, u_char *buf, u_int size,
 			u_long prot_offset, u_int groupno, u_int groupsize);
 
@@ -2003,7 +2093,7 @@ do_otp_write(struct map_info *map, struct flchip *chip, u_long offset,
 
 		datum = map_word_load_partial(map, datum, buf, gap, n);
 		ret = do_write_oneword(map, chip, bus_ofs, datum, FL_OTP_WRITE);
-		if (ret) 
+		if (ret)
 			return ret;
 
 		offset += n;
@@ -2196,7 +2286,7 @@ static int cfi_intelext_lock_user_prot_reg(struct mtd_info *mtd,
 				     NULL, do_otp_lock, 1);
 }
 
-static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd, 
+static int cfi_intelext_get_fact_prot_info(struct mtd_info *mtd,
 					   struct otp_info *buf, size_t len)
 {
 	size_t retlen;
@@ -2239,7 +2329,7 @@ static int cfi_intelext_suspend(struct mtd_info *mtd)
 			if (chip->oldstate == FL_READY) {
 				chip->oldstate = chip->state;
 				chip->state = FL_PM_SUSPENDED;
-				/* No need to wake_up() on this state change - 
+				/* No need to wake_up() on this state change -
 				 * as the whole point is that nobody can do anything
 				 * with the chip now anyway.
 				 */
@@ -2267,9 +2357,9 @@ static int cfi_intelext_suspend(struct mtd_info *mtd)
 	if (ret) {
 		for (i--; i >=0; i--) {
 			chip = &cfi->chips[i];
-			
+
 			spin_lock(chip->mutex);
-			
+
 			if (chip->state == FL_PM_SUSPENDED) {
 				/* No need to force it into a known state here,
 				   because we're returning failure, and it didn't
@@ -2280,8 +2370,8 @@ static int cfi_intelext_suspend(struct mtd_info *mtd)
 			}
 			spin_unlock(chip->mutex);
 		}
-	} 
-	
+	}
+
 	return ret;
 }
 
@@ -2293,11 +2383,11 @@ static void cfi_intelext_resume(struct mtd_info *mtd)
 	struct flchip *chip;
 
 	for (i=0; i<cfi->numchips; i++) {
-	
+
 		chip = &cfi->chips[i];
 
 		spin_lock(chip->mutex);
-		
+
 		/* Go to known state. Chip may have been power cycled */
 		if (chip->state == FL_PM_SUSPENDED) {
 			map_write(map, CMD(0xFF), cfi->chips[i].start);
@@ -2319,7 +2409,7 @@ static int cfi_intelext_reset(struct mtd_info *mtd)
 		struct flchip *chip = &cfi->chips[i];
 
 		/* force the completion of any ongoing operation
-		   and switch to array mode so any bootloader in 
+		   and switch to array mode so any bootloader in
 		   flash is accessible for soft reboot. */
 		spin_lock(chip->mutex);
 		ret = get_chip(map, chip, chip->start, FL_SYNCING);
@@ -2356,20 +2446,23 @@ static void cfi_intelext_destroy(struct mtd_info *mtd)
 	kfree(mtd->eraseregions);
 }
 
-static char im_name_1[]="cfi_cmdset_0001";
-static char im_name_3[]="cfi_cmdset_0003";
+static char im_name_0001[] = "cfi_cmdset_0001";
+static char im_name_0003[] = "cfi_cmdset_0003";
+static char im_name_0200[] = "cfi_cmdset_0200";
 
 static int __init cfi_intelext_init(void)
 {
-	inter_module_register(im_name_1, THIS_MODULE, &cfi_cmdset_0001);
-	inter_module_register(im_name_3, THIS_MODULE, &cfi_cmdset_0001);
+	inter_module_register(im_name_0001, THIS_MODULE, &cfi_cmdset_0001);
+	inter_module_register(im_name_0003, THIS_MODULE, &cfi_cmdset_0001);
+	inter_module_register(im_name_0200, THIS_MODULE, &cfi_cmdset_0001);
 	return 0;
 }
 
 static void __exit cfi_intelext_exit(void)
 {
-	inter_module_unregister(im_name_1);
-	inter_module_unregister(im_name_3);
+	inter_module_unregister(im_name_0001);
+	inter_module_unregister(im_name_0003);
+	inter_module_unregister(im_name_0200);
 }
 
 module_init(cfi_intelext_init);