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-rw-r--r--arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c451
1 files changed, 451 insertions, 0 deletions
diff --git a/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c b/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c
new file mode 100644
index 000000000..c4b58598a
--- /dev/null
+++ b/arch/mips/cavium-octeon/executive/cvmx-helper-rgmii.c
@@ -0,0 +1,451 @@
+/***********************license start***************
+ * Author: Cavium Networks
+ *
+ * Contact: support@caviumnetworks.com
+ * This file is part of the OCTEON SDK
+ *
+ * Copyright (C) 2003-2018 Cavium, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, Version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
+ * NONINFRINGEMENT. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this file; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * or visit http://www.gnu.org/licenses/.
+ *
+ * This file may also be available under a different license from Cavium.
+ * Contact Cavium Networks for more information
+ ***********************license end**************************************/
+
+/*
+ * Functions for RGMII/GMII/MII initialization, configuration,
+ * and monitoring.
+ */
+#include <asm/octeon/octeon.h>
+
+#include <asm/octeon/cvmx-config.h>
+
+#include <asm/octeon/cvmx-pko.h>
+#include <asm/octeon/cvmx-helper.h>
+#include <asm/octeon/cvmx-helper-board.h>
+
+#include <asm/octeon/cvmx-npi-defs.h>
+#include <asm/octeon/cvmx-gmxx-defs.h>
+#include <asm/octeon/cvmx-asxx-defs.h>
+#include <asm/octeon/cvmx-dbg-defs.h>
+
+/**
+ * Probe RGMII ports and determine the number present
+ *
+ * @interface: Interface to probe
+ *
+ * Returns Number of RGMII/GMII/MII ports (0-4).
+ */
+int __cvmx_helper_rgmii_probe(int interface)
+{
+ int num_ports = 0;
+ union cvmx_gmxx_inf_mode mode;
+ mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
+
+ if (mode.s.type) {
+ if (OCTEON_IS_MODEL(OCTEON_CN38XX)
+ || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
+ cvmx_dprintf("ERROR: RGMII initialize called in "
+ "SPI interface\n");
+ } else if (OCTEON_IS_MODEL(OCTEON_CN31XX)
+ || OCTEON_IS_MODEL(OCTEON_CN30XX)
+ || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ /*
+ * On these chips "type" says we're in
+ * GMII/MII mode. This limits us to 2 ports
+ */
+ num_ports = 2;
+ } else {
+ cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n",
+ __func__);
+ }
+ } else {
+ if (OCTEON_IS_MODEL(OCTEON_CN38XX)
+ || OCTEON_IS_MODEL(OCTEON_CN58XX)) {
+ num_ports = 4;
+ } else if (OCTEON_IS_MODEL(OCTEON_CN31XX)
+ || OCTEON_IS_MODEL(OCTEON_CN30XX)
+ || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ num_ports = 3;
+ } else {
+ cvmx_dprintf("ERROR: Unsupported Octeon model in %s\n",
+ __func__);
+ }
+ }
+ return num_ports;
+}
+
+/**
+ * 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.
+ *
+ * @port: IPD port number to loop.
+ */
+void cvmx_helper_rgmii_internal_loopback(int port)
+{
+ int interface = (port >> 4) & 1;
+ int index = port & 0xf;
+ uint64_t tmp;
+
+ union cvmx_gmxx_prtx_cfg gmx_cfg;
+ gmx_cfg.u64 = 0;
+ gmx_cfg.s.duplex = 1;
+ gmx_cfg.s.slottime = 1;
+ gmx_cfg.s.speed = 1;
+ cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
+ cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
+ cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
+ tmp = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
+ cvmx_write_csr(CVMX_ASXX_PRT_LOOP(interface), (1 << index) | tmp);
+ tmp = cvmx_read_csr(CVMX_ASXX_TX_PRT_EN(interface));
+ cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), (1 << index) | tmp);
+ tmp = cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface));
+ cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), (1 << index) | tmp);
+ gmx_cfg.s.en = 1;
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
+}
+
+/**
+ * Workaround ASX setup errata with CN38XX pass1
+ *
+ * @interface: Interface to setup
+ * @port: Port to setup (0..3)
+ * @cpu_clock_hz:
+ * Chip frequency in Hertz
+ *
+ * Returns Zero on success, negative on failure
+ */
+static int __cvmx_helper_errata_asx_pass1(int interface, int port,
+ int cpu_clock_hz)
+{
+ /* Set hi water mark as per errata GMX-4 */
+ if (cpu_clock_hz >= 325000000 && cpu_clock_hz < 375000000)
+ cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 12);
+ else if (cpu_clock_hz >= 375000000 && cpu_clock_hz < 437000000)
+ cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 11);
+ else if (cpu_clock_hz >= 437000000 && cpu_clock_hz < 550000000)
+ cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 10);
+ else if (cpu_clock_hz >= 550000000 && cpu_clock_hz < 687000000)
+ cvmx_write_csr(CVMX_ASXX_TX_HI_WATERX(port, interface), 9);
+ else
+ cvmx_dprintf("Illegal clock frequency (%d). "
+ "CVMX_ASXX_TX_HI_WATERX not set\n", cpu_clock_hz);
+ return 0;
+}
+
+/**
+ * Configure all of the ASX, GMX, and PKO registers required
+ * to get RGMII to function on the supplied interface.
+ *
+ * @interface: PKO Interface to configure (0 or 1)
+ *
+ * Returns Zero on success
+ */
+int __cvmx_helper_rgmii_enable(int interface)
+{
+ int num_ports = cvmx_helper_ports_on_interface(interface);
+ int port;
+ struct cvmx_sysinfo *sys_info_ptr = cvmx_sysinfo_get();
+ union cvmx_gmxx_inf_mode mode;
+ union cvmx_asxx_tx_prt_en asx_tx;
+ union cvmx_asxx_rx_prt_en asx_rx;
+
+ mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
+
+ if (mode.s.en == 0)
+ return -1;
+ if ((OCTEON_IS_MODEL(OCTEON_CN38XX) ||
+ OCTEON_IS_MODEL(OCTEON_CN58XX)) && mode.s.type == 1)
+ /* Ignore SPI interfaces */
+ return -1;
+
+ /* Configure the ASX registers needed to use the RGMII ports */
+ asx_tx.u64 = 0;
+ asx_tx.s.prt_en = cvmx_build_mask(num_ports);
+ cvmx_write_csr(CVMX_ASXX_TX_PRT_EN(interface), asx_tx.u64);
+
+ asx_rx.u64 = 0;
+ asx_rx.s.prt_en = cvmx_build_mask(num_ports);
+ cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface), asx_rx.u64);
+
+ /* Configure the GMX registers needed to use the RGMII ports */
+ for (port = 0; port < num_ports; port++) {
+ /* Setting of CVMX_GMXX_TXX_THRESH has been moved to
+ __cvmx_helper_setup_gmx() */
+
+ if (cvmx_octeon_is_pass1())
+ __cvmx_helper_errata_asx_pass1(interface, port,
+ sys_info_ptr->
+ cpu_clock_hz);
+ else {
+ /*
+ * Configure more flexible RGMII preamble
+ * checking. Pass 1 doesn't support this
+ * feature.
+ */
+ union cvmx_gmxx_rxx_frm_ctl frm_ctl;
+ frm_ctl.u64 =
+ cvmx_read_csr(CVMX_GMXX_RXX_FRM_CTL
+ (port, interface));
+ /* New field, so must be compile time */
+ frm_ctl.s.pre_free = 1;
+ cvmx_write_csr(CVMX_GMXX_RXX_FRM_CTL(port, interface),
+ frm_ctl.u64);
+ }
+
+ /*
+ * Each pause frame transmitted will ask for about 10M
+ * bit times before resume. If buffer space comes
+ * available before that time has expired, an XON
+ * pause frame (0 time) will be transmitted to restart
+ * the flow.
+ */
+ cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_TIME(port, interface),
+ 20000);
+ cvmx_write_csr(CVMX_GMXX_TXX_PAUSE_PKT_INTERVAL
+ (port, interface), 19000);
+
+ if (OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface),
+ 16);
+ cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface),
+ 16);
+ } else {
+ cvmx_write_csr(CVMX_ASXX_TX_CLK_SETX(port, interface),
+ 24);
+ cvmx_write_csr(CVMX_ASXX_RX_CLK_SETX(port, interface),
+ 24);
+ }
+ }
+
+ __cvmx_helper_setup_gmx(interface, num_ports);
+
+ /* enable the ports now */
+ for (port = 0; port < num_ports; port++) {
+ union cvmx_gmxx_prtx_cfg gmx_cfg;
+
+ gmx_cfg.u64 =
+ cvmx_read_csr(CVMX_GMXX_PRTX_CFG(port, interface));
+ gmx_cfg.s.en = 1;
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(port, interface),
+ gmx_cfg.u64);
+ }
+ __cvmx_interrupt_asxx_enable(interface);
+ __cvmx_interrupt_gmxx_enable(interface);
+
+ return 0;
+}
+
+/**
+ * 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().
+ *
+ * @ipd_port: IPD/PKO port to query
+ *
+ * Returns Link state
+ */
+union cvmx_helper_link_info __cvmx_helper_rgmii_link_get(int ipd_port)
+{
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ int index = cvmx_helper_get_interface_index_num(ipd_port);
+ union cvmx_asxx_prt_loop asxx_prt_loop;
+
+ asxx_prt_loop.u64 = cvmx_read_csr(CVMX_ASXX_PRT_LOOP(interface));
+ if (asxx_prt_loop.s.int_loop & (1 << index)) {
+ /* Force 1Gbps full duplex on internal loopback */
+ union cvmx_helper_link_info result;
+ result.u64 = 0;
+ result.s.full_duplex = 1;
+ result.s.link_up = 1;
+ result.s.speed = 1000;
+ return result;
+ } else
+ return __cvmx_helper_board_link_get(ipd_port);
+}
+
+/**
+ * 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().
+ *
+ * @ipd_port: IPD/PKO port to configure
+ * @link_info: The new link state
+ *
+ * Returns Zero on success, negative on failure
+ */
+int __cvmx_helper_rgmii_link_set(int ipd_port,
+ union cvmx_helper_link_info link_info)
+{
+ int result = 0;
+ int interface = cvmx_helper_get_interface_num(ipd_port);
+ int index = cvmx_helper_get_interface_index_num(ipd_port);
+ union cvmx_gmxx_prtx_cfg original_gmx_cfg;
+ union cvmx_gmxx_prtx_cfg new_gmx_cfg;
+ union cvmx_pko_mem_queue_qos pko_mem_queue_qos;
+ union cvmx_pko_mem_queue_qos pko_mem_queue_qos_save[16];
+ union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp;
+ union cvmx_gmxx_tx_ovr_bp gmx_tx_ovr_bp_save;
+ int i;
+
+ /* Ignore speed sets in the simulator */
+ if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
+ return 0;
+
+ /* Read the current settings so we know the current enable state */
+ original_gmx_cfg.u64 =
+ cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
+ new_gmx_cfg = original_gmx_cfg;
+
+ /* Disable the lowest level RX */
+ cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface),
+ cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) &
+ ~(1 << index));
+
+ memset(pko_mem_queue_qos_save, 0, sizeof(pko_mem_queue_qos_save));
+ /* Disable all queues so that TX should become idle */
+ for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) {
+ int queue = cvmx_pko_get_base_queue(ipd_port) + i;
+ cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue);
+ pko_mem_queue_qos.u64 = cvmx_read_csr(CVMX_PKO_MEM_QUEUE_QOS);
+ pko_mem_queue_qos.s.pid = ipd_port;
+ pko_mem_queue_qos.s.qid = queue;
+ pko_mem_queue_qos_save[i] = pko_mem_queue_qos;
+ pko_mem_queue_qos.s.qos_mask = 0;
+ cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS, pko_mem_queue_qos.u64);
+ }
+
+ /* Disable backpressure */
+ gmx_tx_ovr_bp.u64 = cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface));
+ gmx_tx_ovr_bp_save = gmx_tx_ovr_bp;
+ gmx_tx_ovr_bp.s.bp &= ~(1 << index);
+ gmx_tx_ovr_bp.s.en |= 1 << index;
+ cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp.u64);
+ cvmx_read_csr(CVMX_GMXX_TX_OVR_BP(interface));
+
+ /*
+ * Poll the GMX state machine waiting for it to become
+ * idle. Preferably we should only change speed when it is
+ * idle. If it doesn't become idle we will still do the speed
+ * change, but there is a slight chance that GMX will
+ * lockup.
+ */
+ cvmx_write_csr(CVMX_NPI_DBG_SELECT,
+ interface * 0x800 + index * 0x100 + 0x880);
+ CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 7,
+ ==, 0, 10000);
+ CVMX_WAIT_FOR_FIELD64(CVMX_DBG_DATA, union cvmx_dbg_data, data & 0xf,
+ ==, 0, 10000);
+
+ /* Disable the port before we make any changes */
+ new_gmx_cfg.s.en = 0;
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
+ cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
+
+ /* Set full/half duplex */
+ if (cvmx_octeon_is_pass1())
+ /* Half duplex is broken for 38XX Pass 1 */
+ new_gmx_cfg.s.duplex = 1;
+ else if (!link_info.s.link_up)
+ /* Force full duplex on down links */
+ new_gmx_cfg.s.duplex = 1;
+ else
+ new_gmx_cfg.s.duplex = link_info.s.full_duplex;
+
+ /* Set the link speed. Anything unknown is set to 1Gbps */
+ if (link_info.s.speed == 10) {
+ new_gmx_cfg.s.slottime = 0;
+ new_gmx_cfg.s.speed = 0;
+ } else if (link_info.s.speed == 100) {
+ new_gmx_cfg.s.slottime = 0;
+ new_gmx_cfg.s.speed = 0;
+ } else {
+ new_gmx_cfg.s.slottime = 1;
+ new_gmx_cfg.s.speed = 1;
+ }
+
+ /* Adjust the clocks */
+ if (link_info.s.speed == 10) {
+ cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 50);
+ cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40);
+ cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
+ } else if (link_info.s.speed == 100) {
+ cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 5);
+ cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x40);
+ cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
+ } else {
+ cvmx_write_csr(CVMX_GMXX_TXX_CLK(index, interface), 1);
+ cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 0x200);
+ cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0x2000);
+ }
+
+ if (OCTEON_IS_MODEL(OCTEON_CN30XX) || OCTEON_IS_MODEL(OCTEON_CN50XX)) {
+ if ((link_info.s.speed == 10) || (link_info.s.speed == 100)) {
+ union cvmx_gmxx_inf_mode mode;
+ mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
+
+ /*
+ * Port .en .type .p0mii Configuration
+ * ---- --- ----- ------ -----------------------------------------
+ * X 0 X X All links are disabled.
+ * 0 1 X 0 Port 0 is RGMII
+ * 0 1 X 1 Port 0 is MII
+ * 1 1 0 X Ports 1 and 2 are configured as RGMII ports.
+ * 1 1 1 X Port 1: GMII/MII; Port 2: disabled. GMII or
+ * MII port is selected by GMX_PRT1_CFG[SPEED].
+ */
+
+ /* In MII mode, CLK_CNT = 1. */
+ if (((index == 0) && (mode.s.p0mii == 1))
+ || ((index != 0) && (mode.s.type == 1))) {
+ cvmx_write_csr(CVMX_GMXX_TXX_CLK
+ (index, interface), 1);
+ }
+ }
+ }
+
+ /* Do a read to make sure all setup stuff is complete */
+ cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
+
+ /* Save the new GMX setting without enabling the port */
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
+
+ /* Enable the lowest level RX */
+ cvmx_write_csr(CVMX_ASXX_RX_PRT_EN(interface),
+ cvmx_read_csr(CVMX_ASXX_RX_PRT_EN(interface)) | (1 <<
+ index));
+
+ /* Re-enable the TX path */
+ for (i = 0; i < cvmx_pko_get_num_queues(ipd_port); i++) {
+ int queue = cvmx_pko_get_base_queue(ipd_port) + i;
+ cvmx_write_csr(CVMX_PKO_REG_READ_IDX, queue);
+ cvmx_write_csr(CVMX_PKO_MEM_QUEUE_QOS,
+ pko_mem_queue_qos_save[i].u64);
+ }
+
+ /* Restore backpressure */
+ cvmx_write_csr(CVMX_GMXX_TX_OVR_BP(interface), gmx_tx_ovr_bp_save.u64);
+
+ /* Restore the GMX enable state. Port config is complete */
+ new_gmx_cfg.s.en = original_gmx_cfg.s.en;
+ cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), new_gmx_cfg.u64);
+
+ return result;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 08:39:18 +0000