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>

1 files changed, 22 insertions, 0 deletions

diff --git a/spi25.c b/spi25.c
index c9a4664..911dc4e 100644
--- a/spi25.c
+++ b/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;