Implement exp_check_for_ready

Change-Id: I800eb12f166b1af90ce0153e109630cc90c8b8e8 Original-Change-Id: I11e80e70c411ec0f5a1891e078b669f176658c34 Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/61972 Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com> Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com> Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com> Reviewed-by: Louis Stermole <stermole@us.ibm.com> Reviewed-by: RYAN P. KING <rpking@us.ibm.com> Reviewed-by: ANDRE A. MARIN <aamarin@us.ibm.com> Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com> Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/71232 Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com> Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com> Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com> Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
open-power · Feb 12, 2019 · 01826b8 · 01826b8
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diff --git a/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_check_for_ready.C b/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_check_for_ready.C
@@ -22,3 +22,60 @@
 /* permissions and limitations under the License.                         */
 /*                                                                        */
 /* IBM_PROLOG_END_TAG                                                     */
+
+///
+/// @file exp_check_for_ready.C
+/// @brief FW polls I2C slave interface to determine when it is ready
+///
+// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
+// *HWP HWP Backup: Stephen Glancy <sglancy@us.ibm.com>
+// *HWP Team: Memory
+// *HWP Level: 2
+// *HWP Consumed by: FSP:HB
+
+#include <fapi2.H>
+#include <exp_check_for_ready.H>
+#include <lib/i2c/exp_i2c.H>
+#include <generic/memory/lib/utils/poll.H>
+
+extern "C"
+{
+///
+/// @brief Checks if the explorer I2C is ready to receive commands
+/// @param[in] i_target the controller
+/// @return FAPI2_RC_SUCCESS iff ok
+///
+    fapi2::ReturnCode exp_check_for_ready(const fapi2::Target<fapi2::TARGET_TYPE_OCMB_CHIP>& i_target)
+    {
+        // Using default parameters
+        mss::poll_parameters l_poll_params;
+
+        // From MSCC explorer firmware arch spec
+        // 4.1.5: After power-up, the Explorer Chip will respond with NACK to all incoming I2C requests
+        // from the HOST until the I2C slave interface is ready to receive commands.
+        FAPI_ASSERT( mss::poll(i_target, l_poll_params, [i_target]()->bool
+        {
+            return mss::exp::i2c::is_ready(i_target) == fapi2::FAPI2_RC_SUCCESS;
+        }),
+        fapi2::MSS_EXP_I2C_POLLING_TIMEOUT().
+        set_TARGET(i_target),
+        "Failed to see an ACK from I2C -- polling timeout on %s",
+        mss::c_str(i_target) );
+
+        // We send the EXP_FW_STATUS command as a sanity check to see if it returns SUCCESS
+        FAPI_ASSERT( mss::poll(i_target, l_poll_params, [i_target]()->bool
+        {
+            return mss::exp::i2c::fw_status(i_target) == fapi2::FAPI2_RC_SUCCESS;
+        }),
+        fapi2::MSS_EXP_STATUS_POLLING_TIMEOUT().
+        set_TARGET(i_target),
+        "Failled to see a successful return code -- polling timeout on %s",
+        mss::c_str(i_target) );
+
+        return fapi2::FAPI2_RC_SUCCESS;
+
+    fapi_try_exit:
+        return fapi2::current_err;
+    }
+
+}// extern C
diff --git a/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_check_for_ready.H b/src/import/chips/ocmb/explorer/procedures/hwp/memory/exp_check_for_ready.H
@@ -22,3 +22,34 @@
 /* permissions and limitations under the License.                         */
 /*                                                                        */
 /* IBM_PROLOG_END_TAG                                                     */
+
+///
+/// @file exp_check_for_ready.H
+/// @brief FW polls I2C slave interface to determine when it is ready
+///
+// *HWP HWP Owner: Andre Marin <aamarin@us.ibm.com>
+// *HWP HWP Backup: Stephen Glancy <sglancy@us.ibm.com>
+// *HWP Team: Memory
+// *HWP Level: 2
+// *HWP Consumed by: FSP:HB
+
+#ifndef __MSS_EXP_CHECK_FOR_READY__
+#define __MSS_EXP_CHECK_FOR_READY__
+
+#include <fapi2.H>
+
+// Required for Cronus
+typedef fapi2::ReturnCode (*exp_check_for_ready_FP_t) (const fapi2::Target<fapi2::TARGET_TYPE_OCMB_CHIP>&);
+
+extern "C"
+{
+
+///
+/// @brief Checks if the explorer I2C is ready to receive commands
+/// @param[in] i_target the controller
+/// @return FAPI2_RC_SUCCESS iff ok
+///
+    fapi2::ReturnCode exp_check_for_ready(const fapi2::Target<fapi2::TARGET_TYPE_OCMB_CHIP>& i_target);
+
+}// extern C
+#endif