mips: octeon: Add misc cvmx-helper header files
Import misc cvmx-helper header files from 2013 U-Boot. They will be used
by the later added drivers to support PCIe and networking on the MIPS
Octeon II / III platforms.
Signed-off-by: Aaron Williams <awilliams@marvell.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/mips/mach-octeon/include/mach/cvmx-helper-rgmii.h b/arch/mips/mach-octeon/include/mach/cvmx-helper-rgmii.h
new file mode 100644
index 0000000..2a206a8
--- /dev/null
+++ b/arch/mips/mach-octeon/include/mach/cvmx-helper-rgmii.h
@@ -0,0 +1,99 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020 Marvell International Ltd.
+ *
+ * Functions for RGMII/GMII/MII initialization, configuration,
+ * and monitoring.
+ */
+
+#ifndef __CVMX_HELPER_RGMII_H__
+#define __CVMX_HELPER_RGMII_H__
+
+/**
+ * @INTERNAL
+ * Probe RGMII ports and determine the number present
+ *
+ * @param xiface Interface to probe
+ *
+ * @return Number of RGMII/GMII/MII ports (0-4).
+ */
+int __cvmx_helper_rgmii_probe(int xiface);
+
+/**
+ * Put an RGMII interface in loopback mode. Internal packets sent
+ * out will be received back again on the same port. Externally
+ * received packets will echo back out.
+ *
+ * @param port IPD port number to loop.
+ */
+void cvmx_helper_rgmii_internal_loopback(int port);
+
+/**
+ * @INTERNAL
+ * Configure all of the ASX, GMX, and PKO regsiters required
+ * to get RGMII to function on the supplied interface.
+ *
+ * @param xiface PKO Interface to configure (0 or 1)
+ *
+ * @return Zero on success
+ */
+int __cvmx_helper_rgmii_enable(int xiface);
+
+/**
+ * @INTERNAL
+ * Return the link state of an IPD/PKO port as returned by
+ * auto negotiation. The result of this function may not match
+ * Octeon's link config if auto negotiation has changed since
+ * the last call to cvmx_helper_link_set().
+ *
+ * @param ipd_port IPD/PKO port to query
+ *
+ * @return Link state
+ */
+cvmx_helper_link_info_t __cvmx_helper_gmii_link_get(int ipd_port);
+
+/**
+ * @INTERNAL
+ * Return the link state of an IPD/PKO port as returned by
+ * auto negotiation. The result of this function may not match
+ * Octeon's link config if auto negotiation has changed since
+ * the last call to cvmx_helper_link_set().
+ *
+ * @param ipd_port IPD/PKO port to query
+ *
+ * @return Link state
+ */
+cvmx_helper_link_info_t __cvmx_helper_rgmii_link_get(int ipd_port);
+
+/**
+ * @INTERNAL
+ * Configure an IPD/PKO port for the specified link state. This
+ * function does not influence auto negotiation at the PHY level.
+ * The passed link state must always match the link state returned
+ * by cvmx_helper_link_get(). It is normally best to use
+ * cvmx_helper_link_autoconf() instead.
+ *
+ * @param ipd_port IPD/PKO port to configure
+ * @param link_info The new link state
+ *
+ * @return Zero on success, negative on failure
+ */
+int __cvmx_helper_rgmii_link_set(int ipd_port, cvmx_helper_link_info_t link_info);
+
+/**
+ * @INTERNAL
+ * Configure a port for internal and/or external loopback. Internal loopback
+ * causes packets sent by the port to be received by Octeon. External loopback
+ * causes packets received from the wire to sent out again.
+ *
+ * @param ipd_port IPD/PKO port to loopback.
+ * @param enable_internal
+ * Non zero if you want internal loopback
+ * @param enable_external
+ * Non zero if you want external loopback
+ *
+ * @return Zero on success, negative on failure.
+ */
+int __cvmx_helper_rgmii_configure_loopback(int ipd_port, int enable_internal, int enable_external);
+
+#endif