mfd: intel-m10-bmc: Add support for MAX10 BMC Secure Updates

Add macros and definitions required by the MAX10 BMC
Secure Update driver.

Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

include/linux/mfd/intel-m10-bmc.h

@@ -16,6 +16,9 @@
 #define M10BMC_FLASH_END		0x1fffffff
 #define M10BMC_MEM_END			M10BMC_FLASH_END
 
+#define M10BMC_STAGING_BASE		0x18000000
+#define M10BMC_STAGING_SIZE		0x3800000
+
 /* Register offset of system registers */
 #define NIOS2_FW_VERSION		0x0
 #define M10BMC_MAC_LOW			0x10
@@ -33,6 +36,88 @@
 #define M10BMC_VER_PCB_INFO_MSK		GENMASK(31, 24)
 #define M10BMC_VER_LEGACY_INVALID	0xffffffff
 
+/* Secure update doorbell register, in system register region */
+#define M10BMC_DOORBELL			0x400
+
+/* Authorization Result register, in system register region */
+#define M10BMC_AUTH_RESULT		0x404
+
+/* Doorbell register fields */
+#define DRBL_RSU_REQUEST		BIT(0)
+#define DRBL_RSU_PROGRESS		GENMASK(7, 4)
+#define DRBL_HOST_STATUS		GENMASK(11, 8)
+#define DRBL_RSU_STATUS			GENMASK(23, 16)
+#define DRBL_PKVL_EEPROM_LOAD_SEC	BIT(24)
+#define DRBL_PKVL1_POLL_EN		BIT(25)
+#define DRBL_PKVL2_POLL_EN		BIT(26)
+#define DRBL_CONFIG_SEL			BIT(28)
+#define DRBL_REBOOT_REQ			BIT(29)
+#define DRBL_REBOOT_DISABLED		BIT(30)
+
+/* Progress states */
+#define RSU_PROG_IDLE			0x0
+#define RSU_PROG_PREPARE		0x1
+#define RSU_PROG_READY			0x3
+#define RSU_PROG_AUTHENTICATING		0x4
+#define RSU_PROG_COPYING		0x5
+#define RSU_PROG_UPDATE_CANCEL		0x6
+#define RSU_PROG_PROGRAM_KEY_HASH	0x7
+#define RSU_PROG_RSU_DONE		0x8
+#define RSU_PROG_PKVL_PROM_DONE		0x9
+
+/* Device and error states */
+#define RSU_STAT_NORMAL			0x0
+#define RSU_STAT_TIMEOUT		0x1
+#define RSU_STAT_AUTH_FAIL		0x2
+#define RSU_STAT_COPY_FAIL		0x3
+#define RSU_STAT_FATAL			0x4
+#define RSU_STAT_PKVL_REJECT		0x5
+#define RSU_STAT_NON_INC		0x6
+#define RSU_STAT_ERASE_FAIL		0x7
+#define RSU_STAT_WEAROUT		0x8
+#define RSU_STAT_NIOS_OK		0x80
+#define RSU_STAT_USER_OK		0x81
+#define RSU_STAT_FACTORY_OK		0x82
+#define RSU_STAT_USER_FAIL		0x83
+#define RSU_STAT_FACTORY_FAIL		0x84
+#define RSU_STAT_NIOS_FLASH_ERR		0x85
+#define RSU_STAT_FPGA_FLASH_ERR		0x86
+
+#define HOST_STATUS_IDLE		0x0
+#define HOST_STATUS_WRITE_DONE		0x1
+#define HOST_STATUS_ABORT_RSU		0x2
+
+#define rsu_prog(doorbell)	FIELD_GET(DRBL_RSU_PROGRESS, doorbell)
+#define rsu_stat(doorbell)	FIELD_GET(DRBL_RSU_STATUS, doorbell)
+
+/* interval 100ms and timeout 5s */
+#define NIOS_HANDSHAKE_INTERVAL_US	(100 * 1000)
+#define NIOS_HANDSHAKE_TIMEOUT_US	(5 * 1000 * 1000)
+
+/* RSU PREP Timeout (2 minutes) to erase flash staging area */
+#define RSU_PREP_INTERVAL_MS		100
+#define RSU_PREP_TIMEOUT_MS		(2 * 60 * 1000)
+
+/* RSU Complete Timeout (40 minutes) for full flash update */
+#define RSU_COMPLETE_INTERVAL_MS	1000
+#define RSU_COMPLETE_TIMEOUT_MS		(40 * 60 * 1000)
+
+/* Addresses for security related data in FLASH */
+#define BMC_REH_ADDR	0x17ffc004
+#define BMC_PROG_ADDR	0x17ffc000
+#define BMC_PROG_MAGIC	0x5746
+
+#define SR_REH_ADDR	0x17ffd004
+#define SR_PROG_ADDR	0x17ffd000
+#define SR_PROG_MAGIC	0x5253
+
+#define PR_REH_ADDR	0x17ffe004
+#define PR_PROG_ADDR	0x17ffe000
+#define PR_PROG_MAGIC	0x5250
+
+/* Address of 4KB inverted bit vector containing staging area FLASH count */
+#define STAGING_FLASH_COUNT	0x17ffb000
+
 /**
  * struct intel_m10bmc - Intel MAX 10 BMC parent driver data structure
  * @dev: this device