Add support for generic RDID and REMS matching of unknown chips

If a chip is not on the RDID generic vendor list nor on the REMS
specific ID list, flashrom will claim that no chip is there.

Handle these cases gracefully. flashrom will ignore generic matches if a
specific chip was found, so this will have no impact on supported chips,
but help a lot for a first quick analysis by the user or developer. The
only drawback is that unknown chips may be recognized multiple times
until they are added to flashchips.[ch].

Corresponding to flashrom svn r767.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Marc Jones <marcj303@gmail.com>

3 files changed, 38 insertions, 0 deletions

diff --git a/flashchips.c b/flashchips.c
index 65eb7f0..e97786f 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -3340,5 +3340,32 @@ struct flashchip flashchips[] = {
 		.read		= NULL,
 	},
 
+	{
+		.vendor		= "Generic",
+		.name		= "unknown SPI chip (RDID)",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= GENERIC_MANUF_ID,
+		.model_id	= GENERIC_DEVICE_ID,
+		.total_size	= 0,
+		.page_size	= 256,
+		.tested		= TEST_BAD_PREW,
+		.probe		= probe_spi_rdid,
+		.erase		= NULL,
+		.write		= NULL,
+	},
+	{
+		.vendor		= "Generic",
+		.name		= "unknown SPI chip (REMS)",
+		.bustype	= CHIP_BUSTYPE_SPI,
+		.manufacture_id	= GENERIC_MANUF_ID,
+		.model_id	= GENERIC_DEVICE_ID,
+		.total_size	= 0,
+		.page_size	= 256,
+		.tested		= TEST_BAD_PREW,
+		.probe		= probe_spi_rems,
+		.erase		= NULL,
+		.write		= NULL,
+	},
+
 	{ NULL 	}
 };
diff --git a/flashchips.h b/flashchips.h
index 81ce250..95277e6 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -34,6 +34,7 @@
  * SPI parts have 16-bit device IDs if they support RDID.
  */
 
+#define GENERIC_MANUF_ID	0xffff	/* Check if there is a vendor ID */
 #define GENERIC_DEVICE_ID	0xffff	/* Only match the vendor ID */
 
 #define ALLIANCE_ID		0x52	/* Alliance Semiconductor */
diff --git a/spi.c b/spi.c
index 48be29a..29c202c 100644
--- a/spi.c
+++ b/spi.c
@@ -281,6 +281,11 @@ static int probe_spi_rdid_generic(struct flashchip *flash, int bytes)
 	    GENERIC_DEVICE_ID == flash->model_id)
 		return 1;
 
+	/* Test if there is any vendor ID. */
+	if (GENERIC_MANUF_ID == flash->manufacture_id &&
+	    id1 != 0xff)
+		return 1;
+
 	return 0;
 }
 
@@ -340,6 +345,11 @@ int probe_spi_rems(struct flashchip *flash)
 	    GENERIC_DEVICE_ID == flash->model_id)
 		return 1;
 
+	/* Test if there is any vendor ID. */
+	if (GENERIC_MANUF_ID == flash->manufacture_id &&
+	    id1 != 0xff)
+		return 1;
+
 	return 0;
 }