[PATCH v2 21/52] mips: octeon: Add cvmx-helper-sgmii.c
Stefan Roese
sr at denx.de
Thu Apr 7 09:11:23 CEST 2022
From: Aaron Williams <awilliams at marvell.com>
Import cvmx-helper-sgmii.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-sgmii.c | 781 ++++++++++++++++++++++
1 file changed, 781 insertions(+)
create mode 100644 arch/mips/mach-octeon/cvmx-helper-sgmii.c
diff --git a/arch/mips/mach-octeon/cvmx-helper-sgmii.c b/arch/mips/mach-octeon/cvmx-helper-sgmii.c
new file mode 100644
index 000000000000..b789ad5d1913
--- /dev/null
+++ b/arch/mips/mach-octeon/cvmx-helper-sgmii.c
@@ -0,0 +1,781 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018-2022 Marvell International Ltd.
+ *
+ * Functions for SGMII 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-pki-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>
+
+/**
+ * @INTERNAL
+ * Perform initialization required only once for an SGMII port.
+ *
+ * @param interface to init
+ * @param index Index of prot on the interface
+ *
+ * @return Zero on success, negative on failure
+ */
+static int __cvmx_helper_sgmii_hardware_init_one_time(int interface, int index)
+{
+ const u64 clock_mhz = 1200; /* todo: fixme */
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+ union cvmx_pcsx_linkx_timer_count_reg pcsx_linkx_timer_count_reg;
+ union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return 0;
+
+ /* Disable GMX */
+ gmxx_prtx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+ gmxx_prtx_cfg.s.en = 0;
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
+
+ /*
+ * Write PCS*_LINK*_TIMER_COUNT_REG[COUNT] with the
+ * appropriate value. 1000BASE-X specifies a 10ms
+ * interval. SGMII specifies a 1.6ms interval.
+ */
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+ /* Adjust the MAC mode if requested by device tree */
+ pcsx_miscx_ctl_reg.s.mac_phy =
+ cvmx_helper_get_mac_phy_mode(interface, index);
+ pcsx_miscx_ctl_reg.s.mode =
+ cvmx_helper_get_1000x_mode(interface, index);
+ csr_wr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
+ pcsx_miscx_ctl_reg.u64);
+
+ pcsx_linkx_timer_count_reg.u64 =
+ csr_rd(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface));
+ if (pcsx_miscx_ctl_reg.s.mode)
+ /* 1000BASE-X */
+ pcsx_linkx_timer_count_reg.s.count =
+ (10000ull * clock_mhz) >> 10;
+ else
+ /* SGMII */
+ pcsx_linkx_timer_count_reg.s.count =
+ (1600ull * clock_mhz) >> 10;
+
+ csr_wr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface),
+ pcsx_linkx_timer_count_reg.u64);
+
+ /*
+ * Write the advertisement register to be used as the
+ * tx_Config_Reg<D15:D0> of the autonegotiation. In
+ * 1000BASE-X mode, tx_Config_Reg<D15:D0> is PCS*_AN*_ADV_REG.
+ * In SGMII PHY mode, tx_Config_Reg<D15:D0> is
+ * PCS*_SGM*_AN_ADV_REG. In SGMII MAC mode,
+ * tx_Config_Reg<D15:D0> is the fixed value 0x4001, so this
+ * step can be skipped.
+ */
+ if (pcsx_miscx_ctl_reg.s.mode) {
+ /* 1000BASE-X */
+ union cvmx_pcsx_anx_adv_reg pcsx_anx_adv_reg;
+
+ pcsx_anx_adv_reg.u64 =
+ csr_rd(CVMX_PCSX_ANX_ADV_REG(index, interface));
+ pcsx_anx_adv_reg.s.rem_flt = 0;
+ pcsx_anx_adv_reg.s.pause = 3;
+ pcsx_anx_adv_reg.s.hfd = 1;
+ pcsx_anx_adv_reg.s.fd = 1;
+ csr_wr(CVMX_PCSX_ANX_ADV_REG(index, interface),
+ pcsx_anx_adv_reg.u64);
+ } else {
+ if (pcsx_miscx_ctl_reg.s.mac_phy) {
+ /* PHY Mode */
+ union cvmx_pcsx_sgmx_an_adv_reg pcsx_sgmx_an_adv_reg;
+
+ pcsx_sgmx_an_adv_reg.u64 = csr_rd(
+ CVMX_PCSX_SGMX_AN_ADV_REG(index, interface));
+ pcsx_sgmx_an_adv_reg.s.dup = 1;
+ pcsx_sgmx_an_adv_reg.s.speed = 2;
+ csr_wr(CVMX_PCSX_SGMX_AN_ADV_REG(index, interface),
+ pcsx_sgmx_an_adv_reg.u64);
+ } else {
+ /* MAC Mode - Nothing to do */
+ }
+ }
+ return 0;
+}
+
+static int __cvmx_helper_need_g15618(void)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CN63XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN66XX_PASS1_X) ||
+ OCTEON_IS_MODEL(OCTEON_CN68XX))
+ return 1;
+ else
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Initialize the SERTES link for the first time or after a loss
+ * of link.
+ *
+ * @param interface to init
+ * @param index Index of prot on the interface
+ *
+ * @return Zero on success, negative on failure
+ */
+static int __cvmx_helper_sgmii_hardware_init_link(int interface, int index)
+{
+ union cvmx_pcsx_mrx_control_reg control_reg;
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+ bool phy_mode;
+ bool an_disable; /** Disable autonegotiation */
+ bool mode_1000x; /** 1000Base-X mode */
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return 0;
+
+ /*
+ * Take PCS through a reset sequence.
+ * PCS*_MR*_CONTROL_REG[PWR_DN] should be cleared to zero.
+ * Write PCS*_MR*_CONTROL_REG[RESET]=1 (while not changing the
+ * value of the other PCS*_MR*_CONTROL_REG bits). Read
+ * PCS*_MR*_CONTROL_REG[RESET] until it changes value to
+ * zero.
+ */
+ control_reg.u64 = csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+
+ /*
+ * Errata G-15618 requires disabling PCS soft reset in CN63XX
+ * pass upto 2.1.
+ */
+ if (!__cvmx_helper_need_g15618()) {
+ control_reg.s.reset = 1;
+ csr_wr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
+ control_reg.u64);
+ if (CVMX_WAIT_FOR_FIELD64(
+ CVMX_PCSX_MRX_CONTROL_REG(index, interface),
+ cvmx_pcsx_mrx_control_reg_t, reset, ==, 0, 10000)) {
+ debug("SGMII%x: Timeout waiting for port %d to finish reset\n",
+ interface, index);
+ return -1;
+ }
+ }
+
+ /*
+ * Write PCS*_MR*_CONTROL_REG[RST_AN]=1 to ensure a fresh
+ * sgmii negotiation starts.
+ */
+ phy_mode = cvmx_helper_get_mac_phy_mode(interface, index);
+ an_disable = (phy_mode ||
+ !cvmx_helper_get_port_autonegotiation(interface, index));
+
+ control_reg.s.an_en = !an_disable;
+
+ /* Force a PCS reset by powering down the PCS interface
+ * This is needed to deal with broken Qualcomm/Atheros PHYs and switches
+ * which never recover if PCS is not power cycled. The alternative
+ * is to power cycle or hardware reset the Qualcomm devices whenever
+ * SGMII is initialized.
+ *
+ * This is needed for the QCA8033 PHYs as well as the QCA833X switches
+ * to work. The QCA8337 switch has additional SGMII problems and is
+ * best avoided if at all possible. Failure to power cycle PCS prevents
+ * any traffic from flowing between Octeon and Qualcomm devices if there
+ * is a warm reset. Even a software reset to the Qualcomm device will
+ * not work.
+ *
+ * Note that this problem has been reported between Qualcomm and other
+ * vendor's processors as well so this problem is not unique to
+ * Qualcomm and Octeon.
+ *
+ * Power cycling PCS doesn't hurt anything with non-Qualcomm devices
+ * other than adding a 25ms delay during initialization.
+ */
+ control_reg.s.pwr_dn = 1;
+ csr_wr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), control_reg.u64);
+ csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+
+ /* 25ms should be enough, 10ms is too short */
+ mdelay(25);
+
+ control_reg.s.pwr_dn = 0;
+ csr_wr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), control_reg.u64);
+
+ /* The Cortina PHY runs in 1000base-X mode */
+ mode_1000x = cvmx_helper_get_1000x_mode(interface, index);
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+ pcsx_miscx_ctl_reg.s.mode = mode_1000x;
+ pcsx_miscx_ctl_reg.s.mac_phy = phy_mode;
+ csr_wr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
+ pcsx_miscx_ctl_reg.u64);
+ if (an_disable)
+ /* In PHY mode we can't query the link status so we just
+ * assume that the link is up.
+ */
+ return 0;
+
+ /*
+ * Wait for PCS*_MR*_STATUS_REG[AN_CPT] to be set, indicating
+ * that sgmii autonegotiation is complete. In MAC mode this
+ * isn't an ethernet link, but a link between Octeon and the
+ * PHY.
+ */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface),
+ union cvmx_pcsx_mrx_status_reg, an_cpt, ==, 1,
+ 10000)) {
+ debug("SGMII%x: Port %d link timeout\n", interface, index);
+ return -1;
+ }
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Configure an SGMII link to the specified speed after the SERTES
+ * link is up.
+ *
+ * @param interface to init
+ * @param index Index of prot on the interface
+ * @param link_info Link state to configure
+ *
+ * @return Zero on success, negative on failure
+ */
+static int
+__cvmx_helper_sgmii_hardware_init_link_speed(int interface, int index,
+ cvmx_helper_link_info_t link_info)
+{
+ int is_enabled;
+ union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return 0;
+
+ /* Disable GMX before we make any changes. Remember the enable state */
+ gmxx_prtx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+ is_enabled = gmxx_prtx_cfg.s.en;
+ gmxx_prtx_cfg.s.en = 0;
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
+
+ /* Wait for GMX to be idle */
+ if (CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface),
+ cvmx_gmxx_prtx_cfg_t, rx_idle, ==, 1,
+ 10000) ||
+ CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface),
+ cvmx_gmxx_prtx_cfg_t, tx_idle, ==, 1,
+ 10000)) {
+ debug("SGMII%d: Timeout waiting for port %d to be idle\n",
+ interface, index);
+ return -1;
+ }
+
+ /* Read GMX CFG again to make sure the disable completed */
+ gmxx_prtx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+
+ /*
+ * Get the misc control for PCS. We will need to set the
+ * duplication amount.
+ */
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+
+ /*
+ * Use GMXENO to force the link down if the status we get says
+ * it should be down.
+ */
+ pcsx_miscx_ctl_reg.s.gmxeno = !link_info.s.link_up;
+
+ /* Only change the duplex setting if the link is up */
+ if (link_info.s.link_up)
+ gmxx_prtx_cfg.s.duplex = link_info.s.full_duplex;
+
+ /* Do speed based setting for GMX */
+ switch (link_info.s.speed) {
+ case 10:
+ gmxx_prtx_cfg.s.speed = 0;
+ gmxx_prtx_cfg.s.speed_msb = 1;
+ gmxx_prtx_cfg.s.slottime = 0;
+ /* Setting from GMX-603 */
+ pcsx_miscx_ctl_reg.s.samp_pt = 25;
+ csr_wr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
+ csr_wr(CVMX_GMXX_TXX_BURST(index, interface), 0);
+ break;
+ case 100:
+ gmxx_prtx_cfg.s.speed = 0;
+ gmxx_prtx_cfg.s.speed_msb = 0;
+ gmxx_prtx_cfg.s.slottime = 0;
+ pcsx_miscx_ctl_reg.s.samp_pt = 0x5;
+ csr_wr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
+ csr_wr(CVMX_GMXX_TXX_BURST(index, interface), 0);
+ break;
+ case 1000:
+ gmxx_prtx_cfg.s.speed = 1;
+ gmxx_prtx_cfg.s.speed_msb = 0;
+ gmxx_prtx_cfg.s.slottime = 1;
+ pcsx_miscx_ctl_reg.s.samp_pt = 1;
+ csr_wr(CVMX_GMXX_TXX_SLOT(index, interface), 512);
+ if (gmxx_prtx_cfg.s.duplex)
+ /* full duplex */
+ csr_wr(CVMX_GMXX_TXX_BURST(index, interface), 0);
+ else
+ /* half duplex */
+ csr_wr(CVMX_GMXX_TXX_BURST(index, interface), 8192);
+ break;
+ default:
+ break;
+ }
+
+ /* Write the new misc control for PCS */
+ csr_wr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
+ pcsx_miscx_ctl_reg.u64);
+
+ /* Write the new GMX settings with the port still disabled */
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
+
+ /* Read GMX CFG again to make sure the config completed */
+ gmxx_prtx_cfg.u64 = csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+
+ /* Restore the enabled / disabled state */
+ gmxx_prtx_cfg.s.en = is_enabled;
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
+
+ return 0;
+}
+
+/**
+ * @INTERNAL
+ * Bring up the SGMII interface to be ready for packet I/O but
+ * leave I/O disabled using the GMX override. This function
+ * follows the bringup documented in 10.6.3 of the manual.
+ *
+ * @param interface to bringup
+ * @param num_ports Number of ports on the interface
+ *
+ * @return Zero on success, negative on failure
+ */
+static int __cvmx_helper_sgmii_hardware_init(int interface, int num_ports)
+{
+ int index;
+ int do_link_set = 1;
+
+ /*
+ * 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 = 0xf;
+ ciu_qlm.s.txmargin = 0xd;
+ 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 == 4) {
+ union cvmx_ciu_qlm2 ciu_qlm;
+
+ ciu_qlm.u64 = csr_rd(CVMX_CIU_QLM2);
+ ciu_qlm.s.txbypass = 1;
+ ciu_qlm.s.txdeemph = 0x0;
+ ciu_qlm.s.txmargin = 0xf;
+ csr_wr(CVMX_CIU_QLM2, ciu_qlm.u64);
+ }
+ }
+
+ __cvmx_helper_setup_gmx(interface, num_ports);
+
+ for (index = 0; index < num_ports; index++) {
+ int ipd_port = cvmx_helper_get_ipd_port(interface, index);
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ continue;
+ __cvmx_helper_sgmii_hardware_init_one_time(interface, index);
+ if (do_link_set)
+ __cvmx_helper_sgmii_link_set(ipd_port,
+ __cvmx_helper_sgmii_link_get(ipd_port));
+ }
+
+ return 0;
+}
+
+int __cvmx_helper_sgmii_enumerate(int xiface)
+{
+ if (OCTEON_IS_MODEL(OCTEON_CNF71XX))
+ return 2;
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ struct cvmx_xiface xi =
+ cvmx_helper_xiface_to_node_interface(xiface);
+ enum cvmx_qlm_mode qlm_mode =
+ cvmx_qlm_get_dlm_mode(0, xi.interface);
+
+ if (qlm_mode == CVMX_QLM_MODE_SGMII)
+ return 1;
+ else if (qlm_mode == CVMX_QLM_MODE_QSGMII)
+ return 4;
+ return 0;
+ }
+ return 4;
+}
+
+/**
+ * @INTERNAL
+ * Probe a SGMII interface and determine the number of ports
+ * connected to it. The SGMII 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_sgmii_probe(int xiface)
+{
+ struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);
+ int interface = xi.interface;
+ union cvmx_gmxx_inf_mode mode;
+ int ports;
+
+ /*
+ * Check if QLM is configured correct for SGMII, verify the
+ * speed as well as mode.
+ */
+ if (OCTEON_IS_OCTEON2()) {
+ int qlm = cvmx_qlm_interface(xiface);
+
+ if (cvmx_qlm_get_mode(qlm) != CVMX_QLM_MODE_SGMII)
+ return 0;
+ }
+
+ /* Do not enable the interface if is not in SGMII mode */
+ ports = __cvmx_helper_sgmii_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);
+
+ return ports;
+}
+
+/**
+ * @INTERNAL
+ * Bringup and enable a SGMII 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_sgmii_enable(int xiface)
+{
+ int num_ports = cvmx_helper_ports_on_interface(xiface);
+ struct cvmx_xiface xi = cvmx_helper_xiface_to_node_interface(xiface);
+ int interface = xi.interface;
+ int index;
+
+ /* Setup PKND and BPID */
+ if (octeon_has_feature(OCTEON_FEATURE_PKND)) {
+ for (index = 0; index < num_ports; index++) {
+ union cvmx_gmxx_bpid_msk bpid_msk;
+ union cvmx_gmxx_bpid_mapx bpid_map;
+ union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ continue;
+ /* Setup PKIND */
+ gmxx_prtx_cfg.u64 =
+ csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+ gmxx_prtx_cfg.s.pknd =
+ cvmx_helper_get_pknd(interface, index);
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface),
+ gmxx_prtx_cfg.u64);
+
+ /* Setup BPID */
+ bpid_map.u64 =
+ csr_rd(CVMX_GMXX_BPID_MAPX(index, interface));
+ bpid_map.s.val = 1;
+ bpid_map.s.bpid =
+ cvmx_helper_get_bpid(interface, index);
+ csr_wr(CVMX_GMXX_BPID_MAPX(index, interface),
+ bpid_map.u64);
+
+ bpid_msk.u64 = csr_rd(CVMX_GMXX_BPID_MSK(interface));
+ bpid_msk.s.msk_or |= (1 << index);
+ bpid_msk.s.msk_and &= ~(1 << index);
+ csr_wr(CVMX_GMXX_BPID_MSK(interface), bpid_msk.u64);
+ }
+ }
+
+ __cvmx_helper_sgmii_hardware_init(interface, num_ports);
+
+ /* CN68XX adds the padding and FCS in PKO, not GMX */
+ if (OCTEON_IS_MODEL(OCTEON_CN68XX)) {
+ union cvmx_gmxx_txx_append gmxx_txx_append_cfg;
+
+ for (index = 0; index < num_ports; index++) {
+ if (!cvmx_helper_is_port_valid(interface, index))
+ continue;
+ gmxx_txx_append_cfg.u64 =
+ csr_rd(CVMX_GMXX_TXX_APPEND(index, interface));
+ gmxx_txx_append_cfg.s.fcs = 0;
+ gmxx_txx_append_cfg.s.pad = 0;
+ csr_wr(CVMX_GMXX_TXX_APPEND(index, interface),
+ gmxx_txx_append_cfg.u64);
+ }
+ }
+
+ /* Enable running disparity check for QSGMII interface */
+ if (OCTEON_IS_MODEL(OCTEON_CN70XX) && num_ports > 1) {
+ union cvmx_gmxx_qsgmii_ctl qsgmii_ctl;
+
+ qsgmii_ctl.u64 = 0;
+ qsgmii_ctl.s.disparity = 1;
+ csr_wr(CVMX_GMXX_QSGMII_CTL(interface), qsgmii_ctl.u64);
+ }
+
+ for (index = 0; index < num_ports; index++) {
+ union cvmx_gmxx_txx_append append_cfg;
+ union cvmx_gmxx_txx_sgmii_ctl sgmii_ctl;
+ union cvmx_gmxx_prtx_cfg gmxx_prtx_cfg;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ continue;
+ /*
+ * Clear the align bit if preamble is set to attain
+ * maximum tx rate.
+ */
+ append_cfg.u64 = csr_rd(CVMX_GMXX_TXX_APPEND(index, interface));
+ sgmii_ctl.u64 =
+ csr_rd(CVMX_GMXX_TXX_SGMII_CTL(index, interface));
+ sgmii_ctl.s.align = append_cfg.s.preamble ? 0 : 1;
+ csr_wr(CVMX_GMXX_TXX_SGMII_CTL(index, interface),
+ sgmii_ctl.u64);
+
+ gmxx_prtx_cfg.u64 =
+ csr_rd(CVMX_GMXX_PRTX_CFG(index, interface));
+ gmxx_prtx_cfg.s.en = 1;
+ csr_wr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
+ }
+ 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_sgmii_link_get(int ipd_port)
+{
+ cvmx_helper_link_info_t result;
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ int index = cvmx_helper_get_interface_index_num(ipd_port);
+ union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg;
+ int speed = 1000;
+ int qlm;
+
+ result.u64 = 0;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return result;
+
+ if (OCTEON_IS_MODEL(OCTEON_CN66XX)) {
+ union cvmx_gmxx_inf_mode inf_mode;
+
+ inf_mode.u64 = csr_rd(CVMX_GMXX_INF_MODE(interface));
+ if (inf_mode.s.rate & (1 << index))
+ speed = 2500;
+ else
+ speed = 1000;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN6XXX)) {
+ qlm = cvmx_qlm_interface(interface);
+ speed = cvmx_qlm_get_gbaud_mhz(qlm) * 8 / 10;
+ } else if (OCTEON_IS_MODEL(OCTEON_CNF71XX)) {
+ speed = cvmx_qlm_get_gbaud_mhz(0) * 8 / 10;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN70XX)) {
+ speed = cvmx_qlm_get_gbaud_mhz(0) * 8 / 10;
+ if (cvmx_qlm_get_dlm_mode(0, interface) == CVMX_QLM_MODE_SGMII)
+ speed >>= 1;
+ else
+ speed >>= 2;
+ }
+
+ pcsx_mrx_control_reg.u64 =
+ csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+ if (pcsx_mrx_control_reg.s.loopbck1) {
+ /* Force 1Gbps full duplex link for internal loopback */
+ result.s.link_up = 1;
+ result.s.full_duplex = 1;
+ result.s.speed = speed;
+ return result;
+ }
+
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+ if (pcsx_miscx_ctl_reg.s.mac_phy ||
+ cvmx_helper_get_port_force_link_up(interface, index)) {
+ /* PHY Mode */
+ /* Note that this also works for 1000base-X mode */
+
+ result.s.speed = speed;
+ result.s.full_duplex = 1;
+ result.s.link_up = 1;
+ return result;
+ }
+
+ /* MAC Mode */
+ return __cvmx_helper_board_link_get(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_sgmii_link_set(int ipd_port,
+ cvmx_helper_link_info_t link_info)
+{
+ union cvmx_pcsx_mrx_control_reg control_reg;
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ int index = cvmx_helper_get_interface_index_num(ipd_port);
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return 0;
+
+ /* For some devices, i.e. the Qualcomm QCA8337 switch we need to power
+ * down the PCS interface when the link goes down and power it back
+ * up when the link returns.
+ */
+ if (link_info.s.link_up || !__cvmx_helper_need_g15618()) {
+ __cvmx_helper_sgmii_hardware_init_link(interface, index);
+ } else {
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+
+ /* Disable autonegotiation when MAC mode is enabled or
+ * autonegotiation is disabled.
+ */
+ control_reg.u64 =
+ csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+ if (pcsx_miscx_ctl_reg.s.mac_phy == 0 ||
+ !cvmx_helper_get_port_autonegotiation(interface, index)) {
+ control_reg.s.an_en = 0;
+ control_reg.s.spdmsb = 1;
+ control_reg.s.spdlsb = 0;
+ control_reg.s.dup = 1;
+ }
+ csr_wr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
+ control_reg.u64);
+ csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+ /*
+ * Use GMXENO to force the link down it will get
+ * reenabled later...
+ */
+ pcsx_miscx_ctl_reg.s.gmxeno = 1;
+ csr_wr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
+ pcsx_miscx_ctl_reg.u64);
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+ return 0;
+ }
+ return __cvmx_helper_sgmii_hardware_init_link_speed(interface, index,
+ 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_sgmii_configure_loopback(int ipd_port, int enable_internal,
+ int enable_external)
+{
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ int index = cvmx_helper_get_interface_index_num(ipd_port);
+ union cvmx_pcsx_mrx_control_reg pcsx_mrx_control_reg;
+ union cvmx_pcsx_miscx_ctl_reg pcsx_miscx_ctl_reg;
+
+ if (!cvmx_helper_is_port_valid(interface, index))
+ return 0;
+
+ pcsx_mrx_control_reg.u64 =
+ csr_rd(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
+ pcsx_mrx_control_reg.s.loopbck1 = enable_internal;
+ csr_wr(CVMX_PCSX_MRX_CONTROL_REG(index, interface),
+ pcsx_mrx_control_reg.u64);
+
+ pcsx_miscx_ctl_reg.u64 =
+ csr_rd(CVMX_PCSX_MISCX_CTL_REG(index, interface));
+ pcsx_miscx_ctl_reg.s.loopbck2 = enable_external;
+ csr_wr(CVMX_PCSX_MISCX_CTL_REG(index, interface),
+ pcsx_miscx_ctl_reg.u64);
+
+ __cvmx_helper_sgmii_hardware_init_link(interface, index);
+ return 0;
+}
--
2.35.1
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