Add SPI flash driver

This driver is taken from u-boot and adapted to match
coreboot. It still contains some hacks and is ICH specific
at places.

Change-Id: I97dd8096f7db3b62f8f4f4e4d08bdee10d88f689
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/997
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/src/drivers/spi/spi_flash_internal.h b/src/drivers/spi/spi_flash_internal.h
new file mode 100644
index 0000000000..b895e2b4f3
--- /dev/null
+++ b/src/drivers/spi/spi_flash_internal.h
@@ -0,0 +1,81 @@
+/*
+ * SPI flash internal definitions
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ */
+
+/* Common parameters -- kind of high, but they should only occur when there
+ * is a problem (and well your system already is broken), so err on the side
+ * of caution in case we're dealing with slower SPI buses and/or processors.
+ */
+#define CONFIG_SYS_HZ 100
+#define SPI_FLASH_PROG_TIMEOUT		(2 * CONFIG_SYS_HZ)
+#define SPI_FLASH_PAGE_ERASE_TIMEOUT	(5 * CONFIG_SYS_HZ)
+#define SPI_FLASH_SECTOR_ERASE_TIMEOUT	(10 * CONFIG_SYS_HZ)
+
+/* Common commands */
+#define CMD_READ_ID			0x9f
+
+#define CMD_READ_ARRAY_SLOW		0x03
+#define CMD_READ_ARRAY_FAST		0x0b
+#define CMD_READ_ARRAY_LEGACY		0xe8
+
+#define CMD_READ_STATUS			0x05
+#define CMD_WRITE_ENABLE		0x06
+
+/* Common status */
+#define STATUS_WIP			0x01
+
+/* Send a single-byte command to the device and read the response */
+int spi_flash_cmd(struct spi_slave *spi, u8 cmd, void *response, size_t len);
+
+/*
+ * Send a multi-byte command to the device and read the response. Used
+ * for flash array reads, etc.
+ */
+int spi_flash_cmd_read(struct spi_slave *spi, const u8 *cmd,
+		size_t cmd_len, void *data, size_t data_len);
+
+int spi_flash_cmd_read_fast(struct spi_flash *flash, u32 offset,
+		size_t len, void *data);
+
+int spi_flash_cmd_read_slow(struct spi_flash *flash, u32 offset,
+		size_t len, void *data);
+
+/*
+ * Send a multi-byte command to the device followed by (optional)
+ * data. Used for programming the flash array, etc.
+ */
+int spi_flash_cmd_write(struct spi_slave *spi, const u8 *cmd, size_t cmd_len,
+		const void *data, size_t data_len);
+
+/*
+ * Same as spi_flash_cmd_read() except it also claims/releases the SPI
+ * bus. Used as common part of the ->read() operation.
+ */
+int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
+		size_t cmd_len, void *data, size_t data_len);
+
+/* Send a command to the device and wait for some bit to clear itself. */
+int spi_flash_cmd_poll_bit(struct spi_flash *flash, unsigned long timeout,
+			   u8 cmd, u8 poll_bit);
+
+/*
+ * Send the read status command to the device and wait for the wip
+ * (write-in-progress) bit to clear itself.
+ */
+int spi_flash_cmd_wait_ready(struct spi_flash *flash, unsigned long timeout);
+
+/* Erase sectors. */
+int spi_flash_cmd_erase(struct spi_flash *flash, u8 erase_cmd,
+			u32 offset, size_t len);
+
+/* Manufacturer-specific probe functions */
+struct spi_flash *spi_flash_probe_spansion(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_atmel(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_eon(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_macronix(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_sst(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_stmicro(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_flash_probe_winbond(struct spi_slave *spi, u8 *idcode);
+struct spi_flash *spi_fram_probe_ramtron(struct spi_slave *spi, u8 *idcode);