zynqmp:pm: Adds new zynqmp-pm api SMC call for efuse
This patch adds new api to access zynqmp efuse memory
Signed-off-by: VNSL Durga <vnsl.durga.challa@xilinx.com>
Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Change-Id: I0971ab6549552a6f96412431388d19b822db00ab
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index 9a1f1b4..3427149 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -1591,3 +1591,29 @@
}
return ret;
}
+
+/**
+ * pm_efuse_access() - To program or read efuse bits.
+ *
+ * This function provides access to the xilskey library to program/read
+ * efuse bits.
+ *
+ * address_low: lower 32-bit Linear memory space address
+ * address_high: higher 32-bit Linear memory space address
+ *
+ * value: Returned output value
+ *
+ * @return Returns status, either success or error+reason
+ *
+ */
+enum pm_ret_status pm_efuse_access(uint32_t address_high,
+ uint32_t address_low,
+ uint32_t *value)
+{
+ uint32_t payload[PAYLOAD_ARG_CNT];
+
+ /* Send request to the PMU */
+ PM_PACK_PAYLOAD3(payload, PM_EFUSE_ACCESS, address_high, address_low);
+
+ return pm_ipi_send_sync(primary_proc, payload, value, 1);
+}
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.h b/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
index 60fc303..b3ebb27 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.h
@@ -196,5 +196,7 @@
enum pm_ret_status pm_pll_set_mode(enum pm_node_id nid, enum pm_pll_mode mode);
enum pm_ret_status pm_pll_get_mode(enum pm_node_id nid, enum pm_pll_mode *mode);
+enum pm_ret_status pm_efuse_access(uint32_t address_high,
+ uint32_t address_low, uint32_t *value);
#endif /* PM_API_SYS_H */
diff --git a/plat/xilinx/zynqmp/pm_service/pm_defs.h b/plat/xilinx/zynqmp/pm_service/pm_defs.h
index 8b28807..da87893 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_defs.h
+++ b/plat/xilinx/zynqmp/pm_service/pm_defs.h
@@ -99,6 +99,7 @@
PM_PLL_GET_MODE,
/* PM Register Access API */
PM_REGISTER_ACCESS,
+ PM_EFUSE_ACCESS,
PM_API_MAX
};
diff --git a/plat/xilinx/zynqmp/pm_service/pm_svc_main.c b/plat/xilinx/zynqmp/pm_service/pm_svc_main.c
index bf608db..5b3e737 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_svc_main.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_svc_main.c
@@ -615,6 +615,14 @@
SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
}
+ case PM_EFUSE_ACCESS:
+ {
+ uint32_t value;
+
+ ret = pm_efuse_access(pm_arg[0], pm_arg[1], &value);
+ SMC_RET1(handle, (uint64_t)ret | ((uint64_t)value) << 32);
+ }
+
default:
WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);
SMC_RET1(handle, SMC_UNK);