xilinx: versal: Add SMC handler for EEMI API

Add SMC handler for EEMI API calls coming from EL1/EL2.
Signed-off-by: Tejas Patel <tejas.patel@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Change-Id: If0ef2a1f2cfc2747be6b91828371bcbec56b1e15

plat/xilinx/versal/pm_service/pm_svc_main.c

@@ -11,9 +11,15 @@
 
 #include <errno.h>
 #include <plat_private.h>
+#include <stdbool.h>
+#include <common/runtime_svc.h>
+#include "pm_api_sys.h"
 #include "pm_client.h"
 #include "pm_ipi.h"
 
+/* pm_up = true - UP, pm_up = false - DOWN */
+static bool pm_up;
+
 /**
  * pm_setup() - PM service setup
  *
@@ -36,7 +42,204 @@ int pm_setup(void)
 	if (status < 0) {
 		INFO("BL31: PM Service Init Failed, Error Code %d!\n", status);
 		ret = status;
+	} else {
+		pm_up = true;
 	}
 
 	return ret;
 }
+
+/**
+ * pm_smc_handler() - SMC handler for PM-API calls coming from EL1/EL2.
+ * @smc_fid - Function Identifier
+ * @x1 - x4 - Arguments
+ * @cookie  - Unused
+ * @handler - Pointer to caller's context structure
+ *
+ * @return  - Unused
+ *
+ * Determines that smc_fid is valid and supported PM SMC Function ID from the
+ * list of pm_api_ids, otherwise completes the request with
+ * the unknown SMC Function ID
+ *
+ * The SMC calls for PM service are forwarded from SIP Service SMC handler
+ * function with rt_svc_handle signature
+ */
+uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
+			uint64_t x4, void *cookie, void *handle, uint64_t flags)
+{
+	enum pm_ret_status ret;
+
+	uint32_t pm_arg[4];
+
+	/* Handle case where PM wasn't initialized properly */
+	if (!pm_up)
+		SMC_RET1(handle, SMC_UNK);
+
+	pm_arg[0] = (uint32_t)x1;
+	pm_arg[1] = (uint32_t)(x1 >> 32);
+	pm_arg[2] = (uint32_t)x2;
+	pm_arg[3] = (uint32_t)(x2 >> 32);
+
+	switch (smc_fid & FUNCID_NUM_MASK) {
+	/* PM API Functions */
+	case PM_SELF_SUSPEND:
+		ret = pm_self_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
+				      pm_arg[3]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_REQ_SUSPEND:
+		ret = pm_req_suspend(pm_arg[0], pm_arg[1], pm_arg[2],
+				     pm_arg[3]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_ABORT_SUSPEND:
+		ret = pm_abort_suspend(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_REQUEST_DEVICE:
+		ret = pm_request_device(pm_arg[0], pm_arg[1], pm_arg[2],
+					pm_arg[3]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_RELEASE_DEVICE:
+		ret = pm_release_device(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_SET_REQUIREMENT:
+		ret = pm_set_requirement(pm_arg[0], pm_arg[1], pm_arg[2],
+					 pm_arg[3]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_GET_API_VERSION:
+	{
+		uint32_t api_version;
+
+		ret = pm_get_api_version(&api_version);
+		SMC_RET1(handle, (uint64_t)PM_RET_SUCCESS |
+				 ((uint64_t)api_version << 32));
+	}
+
+	case PM_GET_DEVICE_STATUS:
+	{
+		uint32_t buff[3];
+
+		ret = pm_get_device_status(pm_arg[0], buff);
+		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)buff[0] << 32),
+			 (uint64_t)buff[1] | ((uint64_t)buff[2] << 32));
+	}
+
+	case PM_RESET_ASSERT:
+		ret = pm_reset_assert(pm_arg[0], pm_arg[1]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_RESET_GET_STATUS:
+	{
+		uint32_t reset_status;
+
+		ret = pm_reset_get_status(pm_arg[0], &reset_status);
+		SMC_RET1(handle, (uint64_t)ret |
+			 ((uint64_t)reset_status << 32));
+	}
+
+	case PM_PINCTRL_REQUEST:
+		ret = pm_pinctrl_request(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_PINCTRL_RELEASE:
+		ret = pm_pinctrl_release(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_PINCTRL_GET_FUNCTION:
+	{
+		uint32_t value = 0;
+
+		ret = pm_pinctrl_get_function(pm_arg[0], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+	}
+
+	case PM_PINCTRL_SET_FUNCTION:
+		ret = pm_pinctrl_set_function(pm_arg[0], pm_arg[1]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_PINCTRL_CONFIG_PARAM_GET:
+	{
+		uint32_t value;
+
+		ret = pm_pinctrl_get_pin_param(pm_arg[0], pm_arg[1], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+	}
+
+	case PM_PINCTRL_CONFIG_PARAM_SET:
+		ret = pm_pinctrl_set_pin_param(pm_arg[0], pm_arg[1], pm_arg[2]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_CLOCK_ENABLE:
+		ret = pm_clock_enable(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_CLOCK_DISABLE:
+		ret = pm_clock_disable(pm_arg[0]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_CLOCK_GETSTATE:
+	{
+		uint32_t value;
+
+		ret = pm_clock_get_state(pm_arg[0], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+	}
+
+	case PM_CLOCK_SETDIVIDER:
+		ret = pm_clock_set_divider(pm_arg[0], pm_arg[1]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_CLOCK_GETDIVIDER:
+	{
+		uint32_t value;
+
+		ret = pm_clock_get_divider(pm_arg[0], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+	}
+
+	case PM_CLOCK_SETPARENT:
+		ret = pm_clock_set_parent(pm_arg[0], pm_arg[1]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_CLOCK_GETPARENT:
+	{
+		uint32_t value;
+
+		ret = pm_clock_get_parent(pm_arg[0], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+	}
+
+	case PM_PLL_SET_PARAMETER:
+		ret = pm_pll_set_param(pm_arg[0], pm_arg[1], pm_arg[2]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_PLL_GET_PARAMETER:
+	{
+		uint32_t value;
+
+		ret = pm_pll_get_param(pm_arg[0], pm_arg[1], &value);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value << 32));
+	}
+
+	case PM_PLL_SET_MODE:
+		ret = pm_pll_set_mode(pm_arg[0], pm_arg[1]);
+		SMC_RET1(handle, (uint64_t)ret);
+
+	case PM_PLL_GET_MODE:
+	{
+		uint32_t mode;
+
+		ret = pm_pll_get_mode(pm_arg[0], &mode);
+		SMC_RET1(handle, (uint64_t)ret | ((uint64_t)mode << 32));
+	}
+
+	default:
+		WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);
+		SMC_RET1(handle, SMC_UNK);
+	}
+}

plat/xilinx/versal/pm_service/pm_svc_main.h

@@ -10,5 +10,8 @@
 #include <pm_common.h>
 
 int pm_setup(void);
+uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
+			uint64_t x4, void *cookie, void *handle,
+			uint64_t flags);
 
 #endif /* PM_SVC_MAIN_H */

plat/xilinx/versal/sip_svc_setup.c

@@ -58,6 +58,12 @@ uintptr_t sip_svc_smc_handler(uint32_t smc_fid,
 			     void *handle,
 			     u_register_t flags)
 {
+	/* Let PM SMC handler deal with PM-related requests */
+	if (is_pm_fid(smc_fid)) {
+		return pm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
+				      flags);
+	}
+
 	/* Let PM SMC handler deal with PM-related requests */
 	switch (smc_fid) {
 	case VERSAL_SIP_SVC_CALL_COUNT: