Index: flashrom.c
===================================================================
--- flashrom.c	(revision 1575)
+++ flashrom.c	(working copy)
@@ -687,6 +687,22 @@
 				break;
 		}
 		break;
+	case write_gran_264bytes:
+		for (j = 0; j < len / 264; j++) {
+			limit = min (264, len - j * 264);
+			/* Are 'have' and 'want' identical? */
+			if (!memcmp(have + j * 264, want + j * 264, limit))
+				continue;
+			/* have needs to be in erased state. */
+			for (i = 0; i < limit; i++)
+				if (have[j * 264 + i] != 0xff) {
+					result = 1;
+					break;
+				}
+			if (result)
+				break;
+		}
+		break;
 	default:
 		msg_cerr("%s: Unsupported granularity! Please report a bug at "
 			 "flashrom@flashrom.org\n", __func__);
@@ -733,6 +749,9 @@
 	case write_gran_256bytes:
 		stride = 256;
 		break;
+	case write_gran_264bytes:
+		stride = 264;
+		break;
 	default:
 		msg_cerr("%s: Unsupported granularity! Please report a bug at "
 			 "flashrom@flashrom.org\n", __func__);
@@ -1240,7 +1259,12 @@
 {
 	unsigned int starthere = 0, lenhere = 0;
 	int ret = 0, skip = 1, writecount = 0;
-	enum write_granularity gran = write_gran_256bytes; /* FIXME */
+	enum write_granularity gran = write_gran_256bytes; 
+	
+	if(flash->page_size == 264 || flash->page_size == 528) {
+		// FIXME - this is wrong for 528-byte blocks
+		gran =  write_gran_264bytes; 
+	}
 
 	/* curcontents and newcontents are opaque to walk_eraseregions, and
 	 * need to be adjusted here to keep the impression of proper abstraction
Index: Makefile
===================================================================
--- Makefile	(revision 1575)
+++ Makefile	(working copy)
@@ -285,7 +285,7 @@
 CHIP_OBJS = jedec.o stm50flw0x0x.o w39.o w29ee011.o \
 	sst28sf040.o m29f400bt.o 82802ab.o pm49fl00x.o \
 	sst49lfxxxc.o sst_fwhub.o flashchips.o spi.o spi25.o \
-	a25.o at25.o opaque.o sfdp.o en29lv640b.o
+	a25.o at25.o opaque.o sfdp.o en29lv640b.o at45db.o
 
 ###############################################################################
 # Library code.
Index: flashchips.c
===================================================================
--- flashchips.c	(revision 1575)
+++ flashchips.c	(working copy)
@@ -2095,14 +2095,35 @@
 		.bustype	= BUS_SPI,
 		.manufacture_id	= ATMEL_ID,
 		.model_id	= ATMEL_AT45DB011D,
-		.total_size	= 128 /* Size can only be determined from status register */,
-		.page_size	= 256 /* Size can only be determined from status register */,
+		.total_size	= 128 /* or 132, determined from status register */,
+		.page_size	= 256 /* or 264, determined from status register */,
 		/* does not support EWSR nor WREN and has no writable status register bits whatsoever */
-		.tested		= TEST_BAD_READ,
-		.probe		= probe_spi_rdid,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at45db,
 		.probe_timing	= TIMING_ZERO,
-		.write		= NULL,
-		.read		= NULL,
+		.block_erasers	=
+		{
+			/*{
+				.eraseblocks = { {256, 512} },
+				.block_erase = ????, //spi_erase_at45db_page,
+			}, {
+			{
+				.eraseblocks = { {8 * 256, 512/8} },
+				.block_erase = ????, //spi_erase_at45db_block,
+			},*/ {
+				.eraseblocks = {
+					{8 * 256, 1},
+					{120 * 256, 1},
+					{128 * 256, 3},
+				},
+				.block_erase = erase_at45db_sector
+			}/*, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = ????, //spi_block_erase_c7,
+			}*/
+		},
+		.write		= spi_write_at45db,
+		.read		= read_at45db,
 		.voltage	= {2700, 3600},
 	},
 
@@ -2113,13 +2134,13 @@
 		.manufacture_id	= ATMEL_ID,
 		.model_id	= ATMEL_AT45DB021D,
 		.total_size	= 256 /* Size can only be determined from status register */,
-		.page_size	= 256 /* Size can only be determined from status register */,
+		.page_size	= 256 /* or 264, determined from status register */,
 		/* does not support EWSR nor WREN and has no writable status register bits whatsoever */
-		.tested		= TEST_BAD_READ,
-		.probe		= probe_spi_rdid,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at45db,
 		.probe_timing	= TIMING_ZERO,
 		.write		= NULL,
-		.read		= NULL,
+		.read		= read_at45db,
 		.voltage	= {2700, 3600},
 	},
 
@@ -2130,13 +2151,13 @@
 		.manufacture_id	= ATMEL_ID,
 		.model_id	= ATMEL_AT45DB041D,
 		.total_size	= 512 /* Size can only be determined from status register */,
-		.page_size	= 256 /* Size can only be determined from status register */,
+		.page_size	= 256 /* or 264, determined from status register */,
 		/* does not support EWSR nor WREN and has no writable status register bits whatsoever */
-		.tested		= TEST_BAD_READ,
-		.probe		= probe_spi_rdid,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at45db,
 		.probe_timing	= TIMING_ZERO,
 		.write		= NULL,
-		.read		= NULL,
+		.read		= read_at45db,
 		.voltage	= {2500, 3600}, /* 2.5-3.6V & 2.7-3.6V models available */
 	},
 
@@ -2147,13 +2168,13 @@
 		.manufacture_id	= ATMEL_ID,
 		.model_id	= ATMEL_AT45DB081D,
 		.total_size	= 1024 /* Size can only be determined from status register */,
-		.page_size	= 256 /* Size can only be determined from status register */,
+		.page_size	= 256 /* or 264, determined from status register */,
 		/* does not support EWSR nor WREN and has no writable status register bits whatsoever */
-		.tested		= TEST_BAD_READ,
-		.probe		= probe_spi_rdid,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at45db,
 		.probe_timing	= TIMING_ZERO,
 		.write		= NULL,
-		.read		= NULL,
+		.read		= read_at45db,
 		.voltage	= {2700, 3600}, /* 2.5-3.6V & 2.7-3.6V models available */
 	},
 
@@ -2164,13 +2185,13 @@
 		.manufacture_id	= ATMEL_ID,
 		.model_id	= ATMEL_AT45DB161D,
 		.total_size	= 2048 /* Size can only be determined from status register */,
-		.page_size	= 512 /* Size can only be determined from status register */,
+		.page_size	= 512 /* or 528, determined from status register */,
 		/* does not support EWSR nor WREN and has no writable status register bits whatsoever */
-		.tested		= TEST_BAD_READ,
-		.probe		= probe_spi_rdid,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at45db,
 		.probe_timing	= TIMING_ZERO,
 		.write		= NULL,
-		.read		= NULL,
+		.read		= read_at45db,
 		.voltage	= {2700, 3600}, /* 2.5-3.6V & 2.7-3.6V models available */
 	},
 
Index: chipdrivers.h
===================================================================
--- chipdrivers.h	(revision 1575)
+++ chipdrivers.h	(working copy)
@@ -87,6 +87,15 @@
 int spi_disable_blockprotect_at25fs010(struct flashctx *flash);
 int spi_disable_blockprotect_at25fs040(struct flashctx *flash);
 
+/* at45db.c */
+int probe_spi_at45db(struct flashctx *flash);
+int read_at45db(struct flashctx *flash, uint8_t *buf, unsigned int start,
+	        unsigned int len);
+int erase_at45db_sector(struct flashctx *flash, unsigned int addr,
+			unsigned int blocklen);
+int spi_write_at45db(struct flashctx *flash, uint8_t *buf,
+		     unsigned int start, unsigned int len);
+
 /* 82802ab.c */
 uint8_t wait_82802ab(struct flashctx *flash);
 int probe_82802ab(struct flashctx *flash);
Index: flash.h
===================================================================
--- flash.h	(revision 1575)
+++ flash.h	(working copy)
@@ -227,6 +227,7 @@
 	write_gran_1bit,
 	write_gran_1byte,
 	write_gran_256bytes,
+	write_gran_264bytes,
 };
 extern int verbose_screen;
 extern int verbose_logfile;