flashchips: Add SST26VF016B(A), SST26VF032B(A), SST26VF064B(A)

This patch seems to have originally been from
https://patchwork.coreboot.org/patch/4126/ . The most recent version
seems to be in OpenEmbedded (commit 503a572) which added support for
16Mbit and 32Mbit variants.

The OpenEmbedded patch also makes changes to linux_spi.c to add some
debug prints which are omitted in this version.

From the original commit message:
Differences between SST26 and SST25:
1. The WREN instruction must be executed prior to WRSR [Section 5.31].
   There is no EWSR.
2. Block protection bits are no longer in the status register. There
   is a dedicated 144-bit register [Table 5-6].  The device is
   write-protected by default. A Global Block-Protection Unlock
   command unlocks the entire memory [Section 4.1].

Change-Id: Ib019bed8ce955049703eb3376c32a83ef607c219
Signed-off-by: Wei Hu <wei@aristanetworks.com>
Signed-off-by: David Hendricks <david.hendricks@gmail.com>
Signed-off-by: Stefan Tauner <stefan.tauner@student.tuwien.ac.at>
Reviewed-on: https://review.coreboot.org/25962
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

4 files changed, 130 insertions, 0 deletions

diff --git a/chipdrivers.h b/chipdrivers.h
index 85c64b2b..134ed265 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -102,6 +102,7 @@ int spi_disable_blockprotect_bp2_ep_srwd(struct flashctx *flash);
 int spi_prettyprint_status_register_sst25(struct flashctx *flash);
 int spi_prettyprint_status_register_sst25vf016(struct flashctx *flash);
 int spi_prettyprint_status_register_sst25vf040b(struct flashctx *flash);
+int spi_disable_blockprotect_sst26_global_unprotect(struct flashctx *flash);
 
 /* sfdp.c */
 int probe_spi_sfdp(struct flashctx *flash);
diff --git a/flashchips.c b/flashchips.c
index 22621fa9..3c045331 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -12918,6 +12918,120 @@ const struct flashchip flashchips[] = {
 
 	{
 		.vendor		= "SST",
+		.name		= "SST26VF016B(A)",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST26VF016B,
+		.total_size	= 2048,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 512} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = {
+					{8 * 1024, 4},
+					{32 * 1024, 1},
+					{64 * 1024, 30},
+					{32 * 1024, 1},
+					{8 * 1024, 4},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {2 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_plain, /* TODO: improve */
+		.unlock		= spi_disable_blockprotect_sst26_global_unprotect,
+		.write		= spi_chip_write_256, /* Multi I/O supported */
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2700, 3600},
+	},
+	{
+		.vendor		= "SST",
+		.name		= "SST26VF032B(A)",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST26VF032B,
+		.total_size	= 4096,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 1024} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = {
+					{8 * 1024, 4},
+					{32 * 1024, 1},
+					{64 * 1024, 62},
+					{32 * 1024, 1},
+					{8 * 1024, 4},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {4 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_plain, /* TODO: improve */
+		.unlock		= spi_disable_blockprotect_sst26_global_unprotect,
+		.write		= spi_chip_write_256, /* Multi I/O supported */
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2700, 3600},
+	},
+
+
+	{
+		.vendor		= "SST",
+		.name		= "SST26VF064B(A)",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= SST_ID,
+		.model_id	= SST_SST26VF064B,
+		.total_size	= 8192,
+		.page_size	= 256,
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 2048} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = {
+					{8 * 1024, 4},
+					{32 * 1024, 1},
+					{64 * 1024, 126},
+					{32 * 1024, 1},
+					{8 * 1024, 4},
+				},
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {8 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_plain, /* TODO: improve */
+		.unlock		= spi_disable_blockprotect_sst26_global_unprotect,
+		.write		= spi_chip_write_256, /* Multi I/O supported */
+		.read		= spi_chip_read, /* Fast read (0x0B) and multi I/O supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "SST",
 		.name		= "SST25WF512",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= SST_ID,
diff --git a/flashchips.h b/flashchips.h
index 6eeb28f4..348f2fd7 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -699,6 +699,8 @@
 #define SST_SST25VF064C		0x254B
 #define SST_SST26VF016		0x2601
 #define SST_SST26VF032		0x2602
+#define SST_SST26VF016B		0x2641
+#define SST_SST26VF032B		0x2642
 #define SST_SST26VF064B		0x2643
 #define SST_SST27SF512		0xA4
 #define SST_SST27SF010		0xA5
diff --git a/spi25_statusreg.c b/spi25_statusreg.c
index 67d676c7..a5fb3b8b 100644
--- a/spi25_statusreg.c
+++ b/spi25_statusreg.c
@@ -195,6 +195,19 @@ int spi_disable_blockprotect(struct flashctx *flash)
 	return spi_disable_blockprotect_generic(flash, 0x3C, 0, 0, 0xFF);
 }
 
+int spi_disable_blockprotect_sst26_global_unprotect(struct flashctx *flash)
+{
+	int result = spi_write_enable(flash);
+	if (result)
+		return result;
+
+	static const unsigned char cmd[] = { 0x98 }; /* ULBPR */
+	result = spi_send_command(flash, sizeof(cmd), 0, cmd, NULL);
+	if (result)
+		msg_cerr("ULBPR failed\n");
+	return result;
+}
+
 /* A common block protection disable that tries to unset the status register bits masked by 0x0C (BP0-1) and
  * protected/locked by bit #7. Useful when bits 4-5 may be non-0). */
 int spi_disable_blockprotect_bp1_srwd(struct flashctx *flash)