[PATCH v3 18/21] arm: socfpga: Bridge reset invokes SMC service calls in EL2

[chee.hong.ang at intel.com]

From: Chee Hong Ang <chee.hong.ang at intel.com>

In EL3, do_bridge_reset() directly send mailbox commands to SDM to
query the FPGA configuration status. If running in non-secure
mode (EL2), it invokes SMC service calls to ATF (EL3) to perform the
query.

Signed-off-by: Chee Hong Ang <chee.hong.ang at intel.com>
---
 arch/arm/mach-socfpga/misc_s10.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-socfpga/misc_s10.c b/arch/arm/mach-socfpga/misc_s10.c
index 393b486..d93aaf5 100644
--- a/arch/arm/mach-socfpga/misc_s10.c
+++ b/arch/arm/mach-socfpga/misc_s10.c
@@ -17,6 +17,7 @@
 #include <asm/arch/misc.h>
 #include <asm/pl310.h>
 #include <linux/libfdt.h>
+#include <linux/intel-smc.h>
 #include <asm/arch/mailbox_s10.h>
 #include <asm/arch/secure_reg_helper.h>
 
@@ -154,11 +155,24 @@ void do_bridge_reset(int enable, unsigned int mask)
 {
 	/* Check FPGA status before bridge enable */
 	if (enable) {
+#if !defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_ATF)
+		u64 arg = 1;
+
+		/* Send MBOX_RECONFIG_STATUS to SDM */
+		int ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_ISDONE, NULL, 0,
+				 NULL, 0);
+
+		if (ret && ret != INTEL_SIP_SMC_FPGA_CONFIG_STATUS_BUSY) {
+			/* Send MBOX_CONFIG_STATUS to SDM */
+			ret = invoke_smc(INTEL_SIP_SMC_FPGA_CONFIG_ISDONE,
+					 &arg, 1, NULL, 0);
+		}
+#else
 		int ret = mbox_get_fpga_config_status(MBOX_RECONFIG_STATUS);
 
 		if (ret && ret != MBOX_CFGSTAT_STATE_CONFIG)
 			ret = mbox_get_fpga_config_status(MBOX_CONFIG_STATUS);
-
+#endif
 		if (ret)
 			return;
 	}
-- 
2.7.4