Add support for Atmel's AT25F series of SPI flash chips

This adds support for the following chips:
 - AT25F512, AT25F512A, AT25F512B
 - AT25F1024, AT25F1024A
 - AT25F2048
 - AT25F4096

Besides the definitions of the the chips in flashchips.c this includes
- a dedicated probing method (probe_spi_at25f)
- pretty printing methods (spi_prettyprint_status_register_at25f*), and
- unlocking methods (spi_disable_blockprotect_at25f*)

Corresponding to flashrom svn r1637.

Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>

chipdrivers.h

@@ -38,6 +38,7 @@ int probe_spi_rdid4(struct flashctx *flash);
 int probe_spi_rems(struct flashctx *flash);
 int probe_spi_res1(struct flashctx *flash);
 int probe_spi_res2(struct flashctx *flash);
+int probe_spi_at25f(struct flashctx *flash);
 int spi_write_enable(struct flashctx *flash);
 int spi_write_disable(struct flashctx *flash);
 int spi_block_erase_20(struct flashctx *flash, unsigned int addr, unsigned int blocklen);
@@ -68,13 +69,19 @@ int spi_disable_blockprotect(struct flashctx *flash);
 int spi_prettyprint_status_register_amic_a25l032(struct flashctx *flash);
 int spi_prettyprint_status_register_at25df(struct flashctx *flash);
 int spi_prettyprint_status_register_at25df_sec(struct flashctx *flash);
+int spi_prettyprint_status_register_at25f(struct flashctx *flash);
+int spi_prettyprint_status_register_at25f512a(struct flashctx *flash);
 int spi_prettyprint_status_register_at25f512b(struct flashctx *flash);
+int spi_prettyprint_status_register_at25f4096(struct flashctx *flash);
 int spi_prettyprint_status_register_at25fs010(struct flashctx *flash);
 int spi_prettyprint_status_register_at25fs040(struct flashctx *flash);
 int spi_prettyprint_status_register_at26df081a(struct flashctx *flash);
 int spi_disable_blockprotect_at25df(struct flashctx *flash);
 int spi_disable_blockprotect_at25df_sec(struct flashctx *flash);
+int spi_disable_blockprotect_at25f(struct flashctx *flash);
+int spi_disable_blockprotect_at25f512a(struct flashctx *flash);
 int spi_disable_blockprotect_at25f512b(struct flashctx *flash);
+int spi_disable_blockprotect_at25f4096(struct flashctx *flash);
 int spi_disable_blockprotect_at25fs010(struct flashctx *flash);
 int spi_disable_blockprotect_at25fs040(struct flashctx *flash);
 int spi_prettyprint_status_register_s33(struct flashctx *flash);

flashchips.c

@@ -1665,6 +1665,65 @@ const struct flashchip flashchips[] = {
 		.voltage	= {2700, 3600},
 	},
 
+	{
+		.vendor		= "Atmel",
+		.name		= "AT25F512",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= ATMEL_ID,
+		.model_id	= ATMEL_AT25F512,
+		.total_size	= 64,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at25f,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_62,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_at25f,
+		.unlock		= spi_disable_blockprotect_at25f,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "Atmel",
+		.name		= "AT25F512A",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= ATMEL_ID,
+		.model_id	= ATMEL_AT25F512A,
+		.total_size	= 64,
+		.page_size	= 128,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at25f,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {32 * 1024, 2} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_62,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_at25f512a,
+		/* FIXME: It is not correct to use this one, because the BP1 bit is N/A. */
+		.unlock		= spi_disable_blockprotect_at25f512a,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
 	{
 		.vendor		= "Atmel",
 		.name		= "AT25F512B",
@@ -1707,6 +1766,95 @@ const struct flashchip flashchips[] = {
 		.voltage	= {2700, 3600},
 	},
 
+	{
+		.vendor		= "Atmel",
+		/* The A suffix indicates 33MHz instead of 20MHz clock rate.
+		 * All other properties seem to be the same.*/
+		.name		= "AT25F1024(A)",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= ATMEL_ID,
+		.model_id	= ATMEL_AT25F1024,
+		.total_size	= 128,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_at25f,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {32 * 1024, 4} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {128 * 1024, 1} },
+				.block_erase = spi_block_erase_62,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_at25f,
+		.unlock		= spi_disable_blockprotect_at25f,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "Atmel",
+		.name		= "AT25F2048",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= ATMEL_ID,
+		.model_id	= ATMEL_AT25F2048,
+		.total_size	= 256,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at25f,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 4} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {256 * 1024, 1} },
+				.block_erase = spi_block_erase_62,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_at25f,
+		.unlock		= spi_disable_blockprotect_at25f,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "Atmel",
+		.name		= "AT25F4096",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= ATMEL_ID,
+		.model_id	= ATMEL_AT25F4096,
+		.total_size	= 512,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_at25f,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {64 * 1024, 8} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {512 * 1024, 1} },
+				.block_erase = spi_block_erase_62,
+			}
+		},
+		.printlock	= spi_prettyprint_status_register_at25f4096,
+		.unlock		= spi_disable_blockprotect_at25f4096,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+	},
+
 	{
 		.vendor		= "Atmel",
 		.name		= "AT25FS010",

flashchips.h

@@ -137,13 +137,12 @@
 #define ATMEL_AT25DF321A	0x4701
 #define ATMEL_AT25DF641		0x4800
 #define ATMEL_AT25DQ161		0x8600
-#define ATMEL_AT25F512		/* No device ID found in datasheet. Vendor ID
+#define ATMEL_AT25F512		0x65	/* guessed, no device ID in datasheet. Needs AT25F_RDID */
-				 * can be read with AT25F512A_RDID */
+#define ATMEL_AT25F512A		0x65	/* Needs AT25F_RDID */
-#define ATMEL_AT25F512A		0x65 /* Needs AT25F512A_RDID */
 #define ATMEL_AT25F512B		0x6500
-#define ATMEL_AT25F1024		/* No device ID found in datasheet. Vendor ID
+#define ATMEL_AT25F1024		0x60	/* Needs AT25F_RDID */
-				 * can be read with AT25F512A_RDID */
+#define ATMEL_AT25F2048		0x63	/* Needs AT25F_RDID */
-#define ATMEL_AT25F1024A		0x60 /* Needs AT25F512A_RDID */
+#define ATMEL_AT25F4096		0x64	/* Needs AT25F_RDID */
 #define ATMEL_AT25FS010		0x6601
 #define ATMEL_AT25FS040		0x6604
 #define ATMEL_AT26DF041		0x4400

spi.h

@@ -30,10 +30,10 @@
 /* INSIZE may be 0x04 for some chips*/
 #define JEDEC_RDID_INSIZE	0x03
 
-/* AT25F512A has bit 3 as don't care bit in commands */
+/* Some Atmel AT25F* models have bit 3 as don't care bit in commands */
-#define AT25F512A_RDID		0x15	/* 0x15 or 0x1d */
+#define AT25F_RDID		0x15	/* 0x15 or 0x1d */
-#define AT25F512A_RDID_OUTSIZE	0x01
+#define AT25F_RDID_OUTSIZE	0x01
-#define AT25F512A_RDID_INSIZE	0x02
+#define AT25F_RDID_INSIZE	0x02
 
 /* Read Electronic Manufacturer Signature */
 #define JEDEC_REMS		0x90

spi25.c

@@ -279,6 +279,28 @@ int probe_spi_res2(struct flashctx *flash)
 	return 1;
 }
 
+/* Only used for some Atmel chips. */
+int probe_spi_at25f(struct flashctx *flash)
+{
+	static const unsigned char cmd[AT25F_RDID_OUTSIZE] = { AT25F_RDID };
+	unsigned char readarr[AT25F_RDID_INSIZE];
+	uint32_t id1;
+	uint32_t id2;
+
+	if (spi_send_command(flash, sizeof(cmd), sizeof(readarr), cmd, readarr))
+		return 0;
+
+	id1 = readarr[0];
+	id2 = readarr[1];
+
+	msg_cdbg("%s: id1 0x%02x, id2 0x%02x\n", __func__, id1, id2);
+
+	if (id1 == flash->chip->manufacture_id && id2 == flash->chip->model_id)
+		return 1;
+
+	return 0;
+}
+
 int spi_chip_erase_60(struct flashctx *flash)
 {
 	int result;

spi25_statusreg.c

@@ -378,6 +378,40 @@ int spi_prettyprint_status_register_at25df_sec(struct flashctx *flash)
 	return spi_prettyprint_status_register_at25df(flash);
 }
 
+/* used for AT25F512, AT25F1024(A), AT25F2048 */
+int spi_prettyprint_status_register_at25f(struct flashctx *flash)
+{
+	uint8_t status;
+
+	status = spi_read_status_register(flash);
+	spi_prettyprint_status_register_hex(status);
+
+	spi_prettyprint_status_register_atmel_at25_wpen(status);
+	spi_prettyprint_status_register_bit(status, 6);
+	spi_prettyprint_status_register_bit(status, 5);
+	spi_prettyprint_status_register_bit(status, 4);
+	spi_prettyprint_status_register_bp(status, 1);
+	spi_prettyprint_status_register_welwip(status);
+	return 0;
+}
+
+int spi_prettyprint_status_register_at25f512a(struct flashctx *flash)
+{
+	uint8_t status;
+
+	status = spi_read_status_register(flash);
+	spi_prettyprint_status_register_hex(status);
+
+	spi_prettyprint_status_register_atmel_at25_wpen(status);
+	spi_prettyprint_status_register_bit(status, 6);
+	spi_prettyprint_status_register_bit(status, 5);
+	spi_prettyprint_status_register_bit(status, 4);
+	spi_prettyprint_status_register_bit(status, 3);
+	spi_prettyprint_status_register_bp(status, 0);
+	spi_prettyprint_status_register_welwip(status);
+	return 0;
+}
+
 int spi_prettyprint_status_register_at25f512b(struct flashctx *flash)
 {
 	uint8_t status = spi_read_status_register(flash);
@@ -392,6 +426,21 @@ int spi_prettyprint_status_register_at25f512b(struct flashctx *flash)
 	return 0;
 }
 
+int spi_prettyprint_status_register_at25f4096(struct flashctx *flash)
+{
+	uint8_t status;
+
+	status = spi_read_status_register(flash);
+	spi_prettyprint_status_register_hex(status);
+
+	spi_prettyprint_status_register_atmel_at25_wpen(status);
+	spi_prettyprint_status_register_bit(status, 6);
+	spi_prettyprint_status_register_bit(status, 5);
+	spi_prettyprint_status_register_bp(status, 2);
+	spi_prettyprint_status_register_welwip(status);
+	return 0;
+}
+
 int spi_prettyprint_status_register_at25fs010(struct flashctx *flash)
 {
 	uint8_t status = spi_read_status_register(flash);
@@ -450,6 +499,16 @@ int spi_disable_blockprotect_at25df_sec(struct flashctx *flash)
 	return spi_disable_blockprotect_at25df(flash);
 }
 
+int spi_disable_blockprotect_at25f(struct flashctx *flash)
+{
+	return spi_disable_blockprotect_generic(flash, 0x0C, 1 << 7, 0);
+}
+
+int spi_disable_blockprotect_at25f512a(struct flashctx *flash)
+{
+	return spi_disable_blockprotect_generic(flash, 0x04, 1 << 7, 0);
+}
+
 int spi_disable_blockprotect_at25f512b(struct flashctx *flash)
 {
 	/* spi_disable_blockprotect_at25df is not really the right way to do
@@ -458,6 +517,11 @@ int spi_disable_blockprotect_at25f512b(struct flashctx *flash)
 	return spi_disable_blockprotect_at25df(flash);
 }
 
+int spi_disable_blockprotect_at25f4096(struct flashctx *flash)
+{
+	return spi_disable_blockprotect_generic(flash, 0x1C, 1 << 7, 0);
+}
+
 int spi_disable_blockprotect_at25fs010(struct flashctx *flash)
 {
 	return spi_disable_blockprotect_generic(flash, 0x6C, 1 << 7, 0);