[PATCH v2 23/52] mips: octeon: Add cvmx-helper-xaui.c
Stefan Roese
sr at denx.de
Thu Apr 7 09:11:25 CEST 2022
From: Aaron Williams <awilliams at marvell.com>
Import cvmx-helper-xaui.c from 2013 U-Boot. It will be used by the later
added drivers to support networking on the MIPS Octeon II / III
platforms.
Signed-off-by: Aaron Williams <awilliams at marvell.com>
Signed-off-by: Stefan Roese <sr at denx.de>
---
arch/mips/mach-octeon/cvmx-helper-xaui.c | 518 +++++++++++++++++++++++
1 file changed, 518 insertions(+)
create mode 100644 arch/mips/mach-octeon/cvmx-helper-xaui.c
diff --git a/arch/mips/mach-octeon/cvmx-helper-xaui.c b/arch/mips/mach-octeon/cvmx-helper-xaui.c
new file mode 100644
index 000000000000..2eb3b7d9c462
--- /dev/null
+++ b/arch/mips/mach-octeon/cvmx-helper-xaui.c
@@ -0,0 +1,518 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018-2022 Marvell International Ltd.
+ *
+ * Functions for XAUI initialization, configuration,
+ * and monitoring.
+ */
+
+#include <time.h>
+#include <log.h>
+#include <linux/delay.h>
+
+#include <mach/cvmx-regs.h>
+#include <mach/cvmx-csr.h>
+#include <mach/cvmx-bootmem.h>
+#include <mach/octeon-model.h>
+#include <mach/cvmx-fuse.h>
+#include <mach/octeon-feature.h>
+#include <mach/cvmx-qlm.h>
+#include <mach/octeon_qlm.h>
+#include <mach/cvmx-pcie.h>
+#include <mach/cvmx-coremask.h>
+
+#include <mach/cvmx-agl-defs.h>
+#include <mach/cvmx-bgxx-defs.h>
+#include <mach/cvmx-ciu-defs.h>
+#include <mach/cvmx-gmxx-defs.h>
+#include <mach/cvmx-ipd-defs.h>
+#include <mach/cvmx-pcsx-defs.h>
+#include <mach/cvmx-pcsxx-defs.h>
+#include <mach/cvmx-pki-defs.h>
+#include <mach/cvmx-pko-defs.h>
+#include <mach/cvmx-xcv-defs.h>
+
+#include <mach/cvmx-helper.h>
+#include <mach/cvmx-helper-board.h>
+#include <mach/cvmx-helper-cfg.h>
+
+int __cvmx_helper_xaui_enumerate(int xiface)
+{
+ struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);
+ int interface = xi.interface;
+ union cvmx_gmxx_hg2_control gmx_hg2_control;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ enum cvmx_qlm_mode qlm_mode =
+ cvmx_qlm_get_dlm_mode(0, interface);
+
+ if (qlm_mode == CVMX_QLM_MODE_RXAUI)
+ return 1;
+ return 0;
+ }
+ /* If HiGig2 is enabled return 16 ports, otherwise return 1 port */
+ gmx_hg2_control.u64 = csr_rd(CVMX_GMXX_HG2_CONTROL(interface));
+ if (gmx_hg2_control.s.hg2tx_en)
+ return 16;
+ else
+ return 1;
+}
+
+/**
+ * @INTERNAL
+ * Probe a XAUI interface and determine the number of ports
+ * connected to it. The XAUI interface should still be down
+ * after this call.
+ *
+ * @param xiface Interface to probe
+ *
+ * @return Number of ports on the interface. Zero to disable.
+ */
+int __cvmx_helper_xaui_probe(int xiface)
+{
+ int i, ports;
+ struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);
+ int interface = xi.interface;
+ union cvmx_gmxx_inf_mode mode;
+
+ /*
+ * CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis
+ * be programmed.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0)) {
+ union cvmx_ciu_qlm2 ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM2);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 0x5;
+ ciu_qlm.s.txmargin = 0x1a;
+ csr_wr(CVMX_CIU_QLM2, ciu_qlm.u64);
+ }
+
+ /*
+ * CN63XX Pass 2.x errata G-15273 requires the QLM De-emphasis
+ * be programmed when using a 156.25Mhz ref clock.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS2_X)) {
+ /* Read the QLM speed pins */
+ union cvmx_mio_rst_boot mio_rst_boot;
+
+ mio_rst_boot.u64 = csr_rd(CVMX_MIO_RST_BOOT);
+
+ if (mio_rst_boot.cn63xx.qlm2_spd == 0xb) {
+ union cvmx_ciu_qlm2 ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM2);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 0xa;
+ ciu_qlm.s.txmargin = 0x1f;
+ csr_wr(CVMX_CIU_QLM2, ciu_qlm.u64);
+ }
+ }
+
+ /*
+ * Check if QLM is configured correct for XAUI/RXAUI, verify
+ * the speed as well as mode.
+ */
+ if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
+ int qlm = cvmx_qlm_interface(xiface);
+ enum cvmx_qlm_mode mode = cvmx_qlm_get_mode(qlm);
+
+ if (mode != CVMX_QLM_MODE_XAUI && mode != CVMX_QLM_MODE_RXAUI)
+ return 0;
+ }
+
+ ports = __cvmx_helper_xaui_enumerate(xiface);
+
+ if (ports <= 0)
+ return 0;
+
+ /*
+ * Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the
+ * interface needs to be enabled before IPD otherwise per port
+ * backpressure may not work properly.
+ */
+ mode.u64 = csr_rd(CVMX_GMXX_INF_MODE(interface));
+ mode.s.en = 1;
+ csr_wr(CVMX_GMXX_INF_MODE(interface), mode.u64);
+
+ if (!OCTEON_IS_MODEL(OCTEON_CN68XX) &&
+ !OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ /*
+ * Setup PKO to support 16 ports for HiGig2 virtual
+ * ports. We're pointing all of the PKO packet ports
+ * for this interface to the XAUI. This allows us to
+ * use HiGig2 backpressure per port.
+ */
+ for (i = 0; i < 16; i++) {
+ union cvmx_pko_mem_port_ptrs pko_mem_port_ptrs;
+
+ pko_mem_port_ptrs.u64 = 0;
+ /*
+ * We set each PKO port to have equal priority
+ * in a round robin fashion.
+ */
+ pko_mem_port_ptrs.s.static_p = 0;
+ pko_mem_port_ptrs.s.qos_mask = 0xff;
+ /* All PKO ports map to the same XAUI hardware port */
+ pko_mem_port_ptrs.s.eid = interface * 4;
+ pko_mem_port_ptrs.s.pid = interface * 16 + i;
+ pko_mem_port_ptrs.s.bp_port = interface * 16 + i;
+ csr_wr(CVMX_PKO_MEM_PORT_PTRS, pko_mem_port_ptrs.u64);
+ }
+ }
+
+ return ports;
+}
+
+/**
+ * @INTERNAL
+ * Bringup XAUI interface. After this call packet I/O should be
+ * fully functional.
+ *
+ * @param interface to bring up
+ *
+ * @return Zero on success, negative on failure
+ */
+int __cvmx_helper_xaui_link_init(int interface)
+{
+ union cvmx_gmxx_prtx_cfg gmx_cfg;
+ union cvmx_pcsxx_control1_reg xaui_ctl;
+ union cvmx_pcsxx_misc_ctl_reg misc_ctl;
+ union cvmx_gmxx_tx_xaui_ctl tx_ctl;
+
+ /* (1) Interface has already been enabled. */
+
+ /* (2) Disable GMX. */
+ misc_ctl.u64 = csr_rd(CVMX_PCSXX_MISC_CTL_REG(interface));
+ misc_ctl.s.gmxeno = 1;
+ csr_wr(CVMX_PCSXX_MISC_CTL_REG(interface), misc_ctl.u64);
+
+ /* (3) Disable GMX and PCSX interrupts. */
+ csr_wr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0);
+ csr_wr(CVMX_GMXX_TX_INT_EN(interface), 0x0);
+ csr_wr(CVMX_PCSXX_INT_EN_REG(interface), 0x0);
+
+ /* (4) Bring up the PCSX and GMX reconciliation layer. */
+ /* (4)a Set polarity and lane swapping. */
+ /* (4)b */
+ tx_ctl.u64 = csr_rd(CVMX_GMXX_TX_XAUI_CTL(interface));
+ /* Enable better IFG packing and improves performance */
+ tx_ctl.s.dic_en = 1;
+ tx_ctl.s.uni_en = 0;
+ csr_wr(CVMX_GMXX_TX_XAUI_CTL(interface), tx_ctl.u64);
+
+ /* (4)c Aply reset sequence */
+ xaui_ctl.u64 = csr_rd(CVMX_PCSXX_CONTROL1_REG(interface));
+ xaui_ctl.s.lo_pwr = 0;
+
+ /*
+ * Errata G-15618 requires disabling PCS soft reset in some
+ * OCTEON II models.
+ */
+ if (!OCTEON_IS_MODEL(OCTEON_CN63XX) &&
+ !OCTEON_IS_MODEL(OCTEON_CN66XX_PASS1_X) &&
+ !OCTEON_IS_MODEL(OCTEON_CN68XX))
+ xaui_ctl.s.reset = 1;
+ csr_wr(CVMX_PCSXX_CONTROL1_REG(interface), xaui_ctl.u64);
+
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX_PASS2_X) && interface != 1) {
+ /*
+ * Note that GMX 1 was skipped as GMX0 is on the same
+ * QLM and will always be done first
+ *
+ * Workaround for Errata (G-16467).
+ */
+ int qlm = interface;
+#ifdef CVMX_QLM_DUMP_STATE
+ debug("%s:%d: XAUI%d: Applying workaround for Errata G-16467\n",
+ __func__, __LINE__, qlm);
+ cvmx_qlm_display_registers(qlm);
+ debug("\n");
+#endif
+ /*
+ * This workaround only applies to QLMs running XAUI
+ * at 6.25Ghz
+ */
+ if ((cvmx_qlm_get_gbaud_mhz(qlm) == 6250) &&
+ (cvmx_qlm_jtag_get(qlm, 0, "clkf_byp") != 20)) {
+ /* Wait 100us for links to stabalize */
+ udelay(100);
+ cvmx_qlm_jtag_set(qlm, -1, "clkf_byp", 20);
+ /* Allow the QLM to exit reset */
+ cvmx_qlm_jtag_set(qlm, -1, "cfg_rst_n_clr", 0);
+ /* Wait 100us for links to stabalize */
+ udelay(100);
+ /* Allow TX on QLM */
+ cvmx_qlm_jtag_set(qlm, -1, "cfg_tx_idle_set", 0);
+ }
+#ifdef CVMX_QLM_DUMP_STATE
+ debug("%s:%d: XAUI%d: Done applying workaround for Errata G-16467\n",
+ __func__, __LINE__, qlm);
+ cvmx_qlm_display_registers(qlm);
+ debug("\n\n");
+#endif
+ }
+
+ /* Wait for PCS to come out of reset */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSXX_CONTROL1_REG(interface),
+ cvmx_pcsxx_control1_reg_t, reset, ==, 0,
+ 10000))
+ return -1;
+ /* Wait for PCS to be aligned */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSXX_10GBX_STATUS_REG(interface),
+ cvmx_pcsxx_10gbx_status_reg_t, alignd, ==, 1,
+ 10000))
+ return -1;
+ /* Wait for RX to be ready */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_RX_XAUI_CTL(interface),
+ cvmx_gmxx_rx_xaui_ctl_t, status, ==, 0,
+ 10000))
+ return -1;
+
+ /* (6) Configure GMX */
+
+ /* Wait for GMX RX to be idle */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(0, interface),
+ cvmx_gmxx_prtx_cfg_t, rx_idle, ==, 1, 10000))
+ return -1;
+ /* Wait for GMX TX to be idle */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(0, interface),
+ cvmx_gmxx_prtx_cfg_t, tx_idle, ==, 1, 10000))
+ return -1;
+
+ /* GMX configure */
+ gmx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(0, interface));
+ gmx_cfg.s.speed = 1;
+ gmx_cfg.s.speed_msb = 0;
+ gmx_cfg.s.slottime = 1;
+ csr_wr(CVMX_GMXX_TX_PRTS(interface), 1);
+ csr_wr(CVMX_GMXX_TXX_SLOT(0, interface), 512);
+ csr_wr(CVMX_GMXX_TXX_BURST(0, interface), 8192);
+ csr_wr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64);
+
+ /* Wait for receive link */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSXX_STATUS1_REG(interface),
+ cvmx_pcsxx_status1_reg_t, rcv_lnk, ==, 1,
+ 10000))
+ return -1;
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSXX_STATUS2_REG(interface),
+ cvmx_pcsxx_status2_reg_t, xmtflt, ==, 0,
+ 10000))
+ return -1;
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSXX_STATUS2_REG(interface),
+ cvmx_pcsxx_status2_reg_t, rcvflt, ==, 0,
+ 10000))
+ return -1;
+
+ /* (8) Enable packet reception */
+ misc_ctl.s.gmxeno = 0;
+ csr_wr(CVMX_PCSXX_MISC_CTL_REG(interface), misc_ctl.u64);
+
+ /* Clear all error interrupts before enabling the interface. */
+ csr_wr(CVMX_GMXX_RXX_INT_REG(0, interface), ~0x0ull);
+ csr_wr(CVMX_GMXX_TX_INT_REG(interface), ~0x0ull);
+ csr_wr(CVMX_PCSXX_INT_REG(interface), ~0x0ull);
+
+ /* Enable GMX */
+ gmx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(0, interface));
+ gmx_cfg.s.en = 1;
+ csr_wr(CVMX_GMXX_PRTX_CFG(0, interface), gmx_cfg.u64);
+
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Bringup and enable a XAUI interface. After this call packet
+ * I/O should be fully functional. This is called with IPD
+ * enabled but PKO disabled.
+ *
+ * @param xiface Interface to bring up
+ *
+ * @return Zero on success, negative on failure
+ */
+int __cvmx_helper_xaui_enable(int xiface)
+{
+ struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);
+ int interface = xi.interface;
+
+ __cvmx_helper_setup_gmx(interface, 1);
+
+ /* Setup PKND and BPID */
+ if (octeon_has_feature(OCTEON_FEATURE_PKND)) {
+ union cvmx_gmxx_bpid_msk bpid_msk;
+ union cvmx_gmxx_bpid_mapx bpid_map;
+ union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
+ union cvmx_gmxx_txx_append gmxx_txx_append_cfg;
+
+ /* Setup PKIND */
+ gmxx_prtx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(0, interface));
+ gmxx_prtx_cfg.s.pknd = cvmx_helper_get_pknd(interface, 0);
+ csr_wr(CVMX_GMXX_PRTX_CFG(0, interface), gmxx_prtx_cfg.u64);
+
+ /* Setup BPID */
+ bpid_map.u64 = csr_rd(CVMX_GMXX_BPID_MAPX(0, interface));
+ bpid_map.s.val = 1;
+ bpid_map.s.bpid = cvmx_helper_get_bpid(interface, 0);
+ csr_wr(CVMX_GMXX_BPID_MAPX(0, interface), bpid_map.u64);
+
+ bpid_msk.u64 = csr_rd(CVMX_GMXX_BPID_MSK(interface));
+ bpid_msk.s.msk_or |= 1;
+ bpid_msk.s.msk_and &= ~1;
+ csr_wr(CVMX_GMXX_BPID_MSK(interface), bpid_msk.u64);
+
+ /* CN68XX adds the padding and FCS in PKO, not GMX */
+ gmxx_txx_append_cfg.u64 =
+ csr_rd(CVMX_GMXX_TXX_APPEND(0, interface));
+ gmxx_txx_append_cfg.s.fcs = 0;
+ gmxx_txx_append_cfg.s.pad = 0;
+ csr_wr(CVMX_GMXX_TXX_APPEND(0, interface),
+ gmxx_txx_append_cfg.u64);
+ }
+
+ /* 70XX eval boards use Marvel phy, set disparity accordingly. */
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ union cvmx_gmxx_rxaui_ctl rxaui_ctl;
+
+ rxaui_ctl.u64 = csr_rd(CVMX_GMXX_RXAUI_CTL(interface));
+ rxaui_ctl.s.disparity = 1;
+ csr_wr(CVMX_GMXX_RXAUI_CTL(interface), rxaui_ctl.u64);
+ }
+
+ __cvmx_helper_xaui_link_init(interface);
+
+ return 0;
+}
+
+/**
+ * @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_xaui_link_get(int ipd_port)
+{
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl;
+ union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl;
+ union cvmx_pcsxx_status1_reg pcsxx_status1_reg;
+ cvmx_helper_link_info_t result;
+
+ gmxx_tx_xaui_ctl.u64 = csr_rd(CVMX_GMXX_TX_XAUI_CTL(interface));
+ gmxx_rx_xaui_ctl.u64 = csr_rd(CVMX_GMXX_RX_XAUI_CTL(interface));
+ pcsxx_status1_reg.u64 = csr_rd(CVMX_PCSXX_STATUS1_REG(interface));
+ result.u64 = 0;
+
+ /* Only return a link if both RX and TX are happy */
+ if (gmxx_tx_xaui_ctl.s.ls == 0 && gmxx_rx_xaui_ctl.s.status == 0 &&
+ pcsxx_status1_reg.s.rcv_lnk == 1) {
+ union cvmx_pcsxx_misc_ctl_reg misc_ctl;
+
+ result.s.link_up = 1;
+ result.s.full_duplex = 1;
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
+ union cvmx_mio_qlmx_cfg qlm_cfg;
+ int lanes;
+ int qlm = (interface == 1) ? 0 : interface;
+
+ qlm_cfg.u64 = csr_rd(CVMX_MIO_QLMX_CFG(qlm));
+ result.s.speed = cvmx_qlm_get_gbaud_mhz(qlm) * 8 / 10;
+ lanes = (qlm_cfg.s.qlm_cfg == 7) ? 2 : 4;
+ result.s.speed *= lanes;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
+ int qlm = cvmx_qlm_interface(interface);
+
+ result.s.speed = cvmx_qlm_get_gbaud_mhz(qlm) * 8 / 10;
+ result.s.speed *= 4;
+ } else {
+ result.s.speed = 10000;
+ }
+ misc_ctl.u64 = csr_rd(CVMX_PCSXX_MISC_CTL_REG(interface));
+ if (misc_ctl.s.gmxeno)
+ __cvmx_helper_xaui_link_init(interface);
+ } else {
+ /* Disable GMX and PCSX interrupts. */
+ csr_wr(CVMX_GMXX_RXX_INT_EN(0, interface), 0x0);
+ csr_wr(CVMX_GMXX_TX_INT_EN(interface), 0x0);
+ csr_wr(CVMX_PCSXX_INT_EN_REG(interface), 0x0);
+ }
+ return result;
+}
+
+/**
+ * @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_xaui_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
+{
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ union cvmx_gmxx_tx_xaui_ctl gmxx_tx_xaui_ctl;
+ union cvmx_gmxx_rx_xaui_ctl gmxx_rx_xaui_ctl;
+
+ gmxx_tx_xaui_ctl.u64 = csr_rd(CVMX_GMXX_TX_XAUI_CTL(interface));
+ gmxx_rx_xaui_ctl.u64 = csr_rd(CVMX_GMXX_RX_XAUI_CTL(interface));
+
+ /* If the link shouldn't be up, then just return */
+ if (!link_info.s.link_up)
+ return 0;
+
+ /* Do nothing if both RX and TX are happy */
+ if (gmxx_tx_xaui_ctl.s.ls == 0 && gmxx_rx_xaui_ctl.s.status == 0)
+ return 0;
+
+ /* Bring the link up */
+ return __cvmx_helper_xaui_link_init(interface);
+}
+
+/**
+ * @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.
+ */
+extern int __cvmx_helper_xaui_configure_loopback(int ipd_port,
+ int enable_internal,
+ int enable_external)
+{
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ union cvmx_pcsxx_control1_reg pcsxx_control1_reg;
+ union cvmx_gmxx_xaui_ext_loopback gmxx_xaui_ext_loopback;
+
+ /* Set the internal loop */
+ pcsxx_control1_reg.u64 = csr_rd(CVMX_PCSXX_CONTROL1_REG(interface));
+ pcsxx_control1_reg.s.loopbck1 = enable_internal;
+ csr_wr(CVMX_PCSXX_CONTROL1_REG(interface), pcsxx_control1_reg.u64);
+
+ /* Set the external loop */
+ gmxx_xaui_ext_loopback.u64 =
+ csr_rd(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface));
+ gmxx_xaui_ext_loopback.s.en = enable_external;
+ csr_wr(CVMX_GMXX_XAUI_EXT_LOOPBACK(interface),
+ gmxx_xaui_ext_loopback.u64);
+
+ /* Take the link through a reset */
+ return __cvmx_helper_xaui_link_init(interface);
+}
--
2.35.1
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