[U-Boot] [PATCH v2] arm: socfpga: stratix10: Add generic FPGA reconfig mailbox API for S10

[chee.hong.ang at intel.com <chee.hong.ang@intel.com>]

From: "Ang, Chee Hong" <chee.hong.ang@intel.com>

Add a generic mailbox API for FPGA reconfig status which can be
called by others. This new function accepts 2 different mailbox
commands: CONFIG_STATUS or RECONFIG_STATUS.

Signed-off-by: Ang, Chee Hong <chee.hong.ang@intel.com>
---
 arch/arm/mach-socfpga/include/mach/mailbox_s10.h |  3 +-
 arch/arm/mach-socfpga/mailbox_s10.c              | 48 ++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-socfpga/include/mach/mailbox_s10.h b/arch/arm/mach-socfpga/include/mach/mailbox_s10.h
index 81a609d..660df35 100644
--- a/arch/arm/mach-socfpga/include/mach/mailbox_s10.h
+++ b/arch/arm/mach-socfpga/include/mach/mailbox_s10.h
@@ -140,5 +140,6 @@ int mbox_qspi_open(void);
 #endif
 
 int mbox_reset_cold(void);
-
+int mbox_get_fpga_config_status(u32 cmd);
+int mbox_get_fpga_config_status_psci(u32 cmd);
 #endif /* _MAILBOX_S10_H_ */
diff --git a/arch/arm/mach-socfpga/mailbox_s10.c b/arch/arm/mach-socfpga/mailbox_s10.c
index 0d906c3..3c33223 100644
--- a/arch/arm/mach-socfpga/mailbox_s10.c
+++ b/arch/arm/mach-socfpga/mailbox_s10.c
@@ -342,6 +342,54 @@ int mbox_reset_cold(void)
 	return 0;
 }
 
+/* Accepted commands: CONFIG_STATUS or RECONFIG_STATUS */
+static __always_inline int mbox_get_fpga_config_status_common(u32 cmd)
+{
+	u32 reconfig_status_resp_len;
+	u32 reconfig_status_resp[RECONFIG_STATUS_RESPONSE_LEN];
+	int ret;
+
+	reconfig_status_resp_len = RECONFIG_STATUS_RESPONSE_LEN;
+	ret = mbox_send_cmd_common(MBOX_ID_UBOOT, cmd,
+				   MBOX_CMD_DIRECT, 0, NULL, 0,
+				   &reconfig_status_resp_len,
+				   reconfig_status_resp);
+
+	if (ret)
+		return ret;
+
+	/* Check for any error */
+	ret = reconfig_status_resp[RECONFIG_STATUS_STATE];
+	if (ret && ret != MBOX_CFGSTAT_STATE_CONFIG)
+		return ret;
+
+	/* Make sure nStatus is not 0 */
+	ret = reconfig_status_resp[RECONFIG_STATUS_PIN_STATUS];
+	if (!(ret & RCF_PIN_STATUS_NSTATUS))
+		return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
+
+	ret = reconfig_status_resp[RECONFIG_STATUS_SOFTFUNC_STATUS];
+	if (ret & RCF_SOFTFUNC_STATUS_SEU_ERROR)
+		return MBOX_CFGSTAT_STATE_ERROR_HARDWARE;
+
+	if ((ret & RCF_SOFTFUNC_STATUS_CONF_DONE) &&
+	    (ret & RCF_SOFTFUNC_STATUS_INIT_DONE) &&
+	    !reconfig_status_resp[RECONFIG_STATUS_STATE])
+		return 0;	/* configuration success */
+
+	return MBOX_CFGSTAT_STATE_CONFIG;
+}
+
+int mbox_get_fpga_config_status(u32 cmd)
+{
+	return mbox_get_fpga_config_status_common(cmd);
+}
+
+int __secure mbox_get_fpga_config_status_psci(u32 cmd)
+{
+	return mbox_get_fpga_config_status_common(cmd);
+}
+
 int mbox_send_cmd(u8 id, u32 cmd, u8 is_indirect, u32 len, u32 *arg,
 		  u8 urgent, u32 *resp_buf_len, u32 *resp_buf)
 {
-- 
2.7.4