SPI: Add API for programmer-specific flashing.

Change-Id: I7a2f5b9ae74458b5ed6271b1c27842c61546dcd2
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/4712
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/drivers/spi/spi_flash.c b/src/drivers/spi/spi_flash.c
index d1a9504..ada4f3a 100644
--- a/src/drivers/spi/spi_flash.c
+++ b/src/drivers/spi/spi_flash.c
@@ -267,6 +267,13 @@
 		goto err_claim_bus;
 	}
 
+	if (spi->force_programmer_specific && spi->programmer_specific_probe) {
+		flash = spi->programmer_specific_probe (spi);
+		if (!flash)
+			goto err_read_id;
+		goto flash_detected;
+	}
+
 	/* Read the ID codes */
 	ret = spi_flash_cmd(spi, CMD_READ_ID, idcode, sizeof(idcode));
 	if (ret)
@@ -295,11 +302,19 @@
 				break;
 		}
 
+	if (!flash && spi->programmer_specific_probe) {
+#if CONFIG_SMM_TSEG && defined(__SMM__)
+		/* Need to relocate this function */
+		tseg_relocate((void **)&spi->programmer_specific_probe);
+#endif
+		flash = spi->programmer_specific_probe (spi);
+	}
 	if (!flash) {
 		printk(BIOS_WARNING, "SF: Unsupported manufacturer %02x\n", *idp);
 		goto err_manufacturer_probe;
 	}
 
+flash_detected:
 #if CONFIG_SMM_TSEG && defined(__SMM__)
 	/* Ensure flash handlers are valid for TSEG */
 	tseg_relocate((void **)&flash->read);