diff --git a/chipdrivers.h b/chipdrivers.h
index e7261e0..496aa7e 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -38,6 +38,7 @@
 int spi_chip_erase_d8(struct flashchip *flash);
 int spi_block_erase_20(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
 int spi_block_erase_52(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
+int spi_block_erase_d7(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
 int spi_block_erase_d8(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
 int spi_block_erase_60(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
 int spi_block_erase_c7(struct flashchip *flash, unsigned int addr, unsigned int blocklen);
diff --git a/flashchips.c b/flashchips.c
index 933682d..465950b 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -2959,7 +2959,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_d8,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 2} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -2975,7 +2988,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_d8,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -2986,12 +3012,25 @@
 		.bustype	= CHIP_BUSTYPE_SPI,
 		.manufacture_id	= ST_ID,
 		.model_id	= ST_M25PE40,
-		.total_size	= 256,
+		.total_size	= 512,
 		.page_size	= 256,
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_d8,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3007,7 +3046,20 @@
 		.tested		= TEST_OK_PREW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_d8,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 256} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 16} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3023,7 +3075,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_d8,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3039,7 +3104,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {32 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3055,7 +3133,26 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3071,7 +3168,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3087,7 +3197,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3103,7 +3226,26 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 256} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {4 * 1024, 256} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 16} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3119,7 +3261,20 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16} },
+				.block_erase = spi_block_erase_d7,
+			}, {
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3194,10 +3349,23 @@
 		.model_id	= PMC_39F010,
 		.total_size	= 128,
 		.page_size	= 4096,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* Datasheet has no timing info specified */
-		.erase		= erase_chip_jedec,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32} },
+				.block_erase = erase_sector_jedec,
+			}, {
+				.eraseblocks = { {64 * 1024, 2} },
+				.block_erase = erase_block_jedec,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_49f002,
 		.read		= read_memmapped,
 	},
@@ -3211,10 +3379,23 @@
 		.total_size	= 256,
 		.page_size	= 16 * 1024,
 		.feature_bits	= FEATURE_REGISTERMAP,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* routine is wrapper to probe_jedec (pm49fl00x.c) */
-		.erase		= erase_49fl00x,
+		.erase		= NULL, /* Was: erase_49fl00x */
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 64} },
+				.block_erase = erase_sector_jedec,
+			}, {
+				.eraseblocks = { {16 * 1024, 16} },
+				.block_erase = erase_block_jedec,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_49fl00x,
 		.read		= read_memmapped,
 	},
@@ -3228,10 +3409,23 @@
 		.total_size	= 512,
 		.page_size	= 64 * 1024,
 		.feature_bits	= FEATURE_REGISTERMAP,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_jedec,
 		.probe_timing	= TIMING_ZERO,	/* routine is wrapper to probe_jedec (pm49fl00x.c) */
-		.erase		= erase_49fl00x,
+		.erase		= NULL, /* Was: erase_49fl00x */
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 128} },
+				.block_erase = erase_sector_jedec,
+			}, {
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = erase_block_jedec,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = erase_chip_block_jedec,
+			}
+		},
 		.write		= write_49fl00x,
 		.read		= read_memmapped,
 	},
@@ -3247,7 +3441,17 @@
 		.tested		= TEST_UNTESTED,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			},	{
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
@@ -3317,10 +3521,20 @@
 		.model_id	= SPANSION_S25FL016A,
 		.total_size	= 2048,
 		.page_size	= 256,
-		.tested		= TEST_OK_PREW,
+		.tested		= TEST_OK_PRW,
 		.probe		= probe_spi_rdid,
 		.probe_timing	= TIMING_ZERO,
-		.erase		= spi_chip_erase_c7,
+		.erase		= NULL,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 32} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
 		.write		= spi_chip_write_256,
 		.read		= spi_chip_read,
 	},
diff --git a/spi.c b/spi.c
index 952952f..685c917 100644
--- a/spi.c
+++ b/spi.c
@@ -701,6 +701,48 @@
 	return 0;
 }
 
+/* Block size is usually
+ * 4k for PMC
+ */
+int spi_block_erase_d7(struct flashchip *flash, unsigned int addr, unsigned int blocklen)
+{
+	int result;
+	struct spi_command cmds[] = {
+	{
+		.writecnt	= JEDEC_WREN_OUTSIZE,
+		.writearr	= (const unsigned char[]){ JEDEC_WREN },
+		.readcnt	= 0,
+		.readarr	= NULL,
+	}, {
+		.writecnt	= JEDEC_BE_D7_OUTSIZE,
+		.writearr	= (const unsigned char[]){ JEDEC_BE_D7, (addr >> 16) & 0xff, (addr >> 8) & 0xff, (addr & 0xff) },
+		.readcnt	= 0,
+		.readarr	= NULL,
+	}, {
+		.writecnt	= 0,
+		.writearr	= NULL,
+		.readcnt	= 0,
+		.readarr	= NULL,
+	}};
+
+	result = spi_send_multicommand(cmds);
+	if (result) {
+		fprintf(stderr, "%s failed during command execution at address 0x%x\n",
+			__func__, addr);
+		return result;
+	}
+	/* Wait until the Write-In-Progress bit is cleared.
+	 * This usually takes 100-4000 ms, so wait in 100 ms steps.
+	 */
+	while (spi_read_status_register() & JEDEC_RDSR_BIT_WIP)
+		programmer_delay(100 * 1000);
+	if (check_erased_range(flash, addr, blocklen)) {
+		fprintf(stderr, "ERASE FAILED!\n");
+		return -1;
+	}
+	return 0;
+}
+
 int spi_chip_erase_d8(struct flashchip *flash)
 {
 	int i, rc = 0;
diff --git a/spi.h b/spi.h
index 2fa7dcd..1b49d59 100644
--- a/spi.h
+++ b/spi.h
@@ -74,6 +74,11 @@
 #define JEDEC_BE_D8_OUTSIZE	0x04
 #define JEDEC_BE_D8_INSIZE	0x00
 
+/* Block Erase 0xd7 is supported by PMC chips. */
+#define JEDEC_BE_D7		0xd7
+#define JEDEC_BE_D7_OUTSIZE	0x04
+#define JEDEC_BE_D7_INSIZE	0x00
+
 /* Sector Erase 0x20 is supported by Macronix/SST chips. */
 #define JEDEC_SE		0x20
 #define JEDEC_SE_OUTSIZE	0x04