drivers/scmi-msg: support for reset domain protocol
Adds SCMI reset domain protocol support in the SCMI message drivers
as defined in SCMI specification v2.0 [1]. Not all the messages
defined in the specification are supported.
scmi_msg_get_rd_handler() sanitizes the message_id value
against any speculative use of reset domain ID as a index since by
SCMI specification, IDs are indices.
This implementation is based on the OP-TEE project implementation [2]
itself based on the SCP-firmware implementation [3] of the SCMI
protocol server side.
Link: [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
Link: [2] https://github.com/OP-TEE/optee_os/commit/56a1f10ed99d683ee3a8af29b6147a59a99ef3e0
Link: [3] https://github.com/ARM-software/SCP-firmware.git
Change-Id: If7cf13de40a815dedb40dcd5af8b6bb6725d9078
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/include/drivers/st/scmi-msg.h b/include/drivers/st/scmi-msg.h
index 48fac16..8f7a788 100644
--- a/include/drivers/st/scmi-msg.h
+++ b/include/drivers/st/scmi-msg.h
@@ -141,4 +141,41 @@
int32_t plat_scmi_clock_set_state(unsigned int agent_id, unsigned int scmi_id,
bool enable_not_disable);
+/* Handlers for SCMI Reset Domain protocol services */
+
+/*
+ * Return number of reset domains for the agent
+ * @agent_id: SCMI agent ID
+ * Return number of reset domains
+ */
+size_t plat_scmi_rstd_count(unsigned int agent_id);
+
+/*
+ * Get reset domain string ID (aka name)
+ * @agent_id: SCMI agent ID
+ * @scmi_id: SCMI reset domain ID
+ * Return pointer to name or NULL
+ */
+const char *plat_scmi_rstd_get_name(unsigned int agent_id, unsigned int scmi_id);
+
+/*
+ * Perform a reset cycle on a target reset domain
+ * @agent_id: SCMI agent ID
+ * @scmi_id: SCMI reset domain ID
+ * @state: Target reset state (see SCMI specification, 0 means context loss)
+ * Return a compliant SCMI error code
+ */
+int32_t plat_scmi_rstd_autonomous(unsigned int agent_id, unsigned int scmi_id,
+ unsigned int state);
+
+/*
+ * Assert or deassert target reset domain
+ * @agent_id: SCMI agent ID
+ * @scmi_id: SCMI reset domain ID
+ * @assert_not_deassert: Assert domain if true, otherwise deassert domain
+ * Return a compliant SCMI error code
+ */
+int32_t plat_scmi_rstd_set_state(unsigned int agent_id, unsigned int scmi_id,
+ bool assert_not_deassert);
+
#endif /* SCMI_MSG_H */