zynqmp: pm: Plumb get_chipid through FW interface

Use the PMUFW get_chipid call to obtain IDCODE and version register.

Cc: Michal Simek <michal.simek@xilinx.com>
Cc: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>

plat/xilinx/zynqmp/aarch64/zynqmp_common.c

@@ -77,18 +77,6 @@ unsigned int zynqmp_get_uart_clk(void)
 	return 100000000;
 }
 
-unsigned int zynqmp_get_silicon_id(void)
-{
-	uint32_t id;
-
-	id = mmio_read_32(ZYNQMP_CSU_BASEADDR + ZYNQMP_CSU_IDCODE_OFFSET);
-
-	id &= ZYNQMP_CSU_IDCODE_DEVICE_CODE_MASK | ZYNQMP_CSU_IDCODE_SVD_MASK;
-	id >>= ZYNQMP_CSU_IDCODE_SVD_SHIFT;
-
-	return id;
-}
-
 #if LOG_LEVEL >= LOG_LEVEL_NOTICE
 static const struct {
 	unsigned int id;
@@ -140,6 +128,18 @@ static const struct {
 	},
 };
 
+static unsigned int zynqmp_get_silicon_id(void)
+{
+	uint32_t id;
+
+	id = mmio_read_32(ZYNQMP_CSU_BASEADDR + ZYNQMP_CSU_IDCODE_OFFSET);
+
+	id &= ZYNQMP_CSU_IDCODE_DEVICE_CODE_MASK | ZYNQMP_CSU_IDCODE_SVD_MASK;
+	id >>= ZYNQMP_CSU_IDCODE_SVD_SHIFT;
+
+	return id;
+}
+
 static char *zynqmp_get_silicon_idcode_name(void)
 {
 	unsigned int id;

plat/xilinx/zynqmp/pm_service/pm_api_sys.c

@@ -541,3 +541,19 @@ enum pm_ret_status pm_fpga_get_status(unsigned int *value)
 	PM_PACK_PAYLOAD1(payload, PM_FPGA_GET_STATUS);
 	return pm_ipi_send_sync(primary_proc, payload, value, 1);
 }
+
+/**
+ * pm_get_chipid() - Read silicon ID registers
+ * @value       Buffer for return values. Must be large enough
+ *		to hold 8 bytes.
+ *
+ * @return      Returns silicon ID registers
+ */
+enum pm_ret_status pm_get_chipid(uint32_t *value)
+{
+	uint32_t payload[PAYLOAD_ARG_CNT];
+
+	/* Send request to the PMU */
+	PM_PACK_PAYLOAD1(payload, PM_GET_CHIPID);
+	return pm_ipi_send_sync(primary_proc, payload, value, 2);
+}

plat/xilinx/zynqmp/pm_service/pm_api_sys.h

@@ -115,4 +115,6 @@ enum pm_ret_status pm_fpga_load(uint32_t address_high,
 				uint32_t flags);
 enum pm_ret_status pm_fpga_get_status(unsigned int *value);
 
+enum pm_ret_status pm_get_chipid(uint32_t *value);
+
 #endif /* _PM_API_SYS_H_ */

plat/xilinx/zynqmp/pm_service/pm_svc_main.c

@@ -242,7 +242,13 @@ uint64_t pm_smc_handler(uint32_t smc_fid, uint64_t x1, uint64_t x2, uint64_t x3,
 	}
 
 	case PM_GET_CHIPID:
-		SMC_RET1(handle, zynqmp_get_silicon_id());
+	{
+		uint32_t result[2];
+
+		ret = pm_get_chipid(result);
+		SMC_RET2(handle, (uint64_t)ret | ((uint64_t)result[0] << 32),
+			 result[1]);
+	}
 
 	default:
 		WARN("Unimplemented PM Service Call: 0x%x\n", smc_fid);

plat/xilinx/zynqmp/zynqmp_private.h

@@ -39,7 +39,6 @@ void zynqmp_config_setup(void);
 unsigned int zynqmp_get_uart_clk(void);
 int zynqmp_is_pmu_up(void);
 unsigned int zynqmp_get_bootmode(void);
-unsigned int zynqmp_get_silicon_id(void);
 
 /* For FSBL handover */
 void fsbl_atf_handover(entry_point_info_t *bl32_image_ep_info,