04b6fa8330
facilities as well as support for the Octeon 2 family of SoCs.
XXX Note that with our antediluvian assembler, we can't support some Octeon 2
instructions and fall back to using the old ones instead.
559 lines
19 KiB
C
559 lines
19 KiB
C
/***********************license start***************
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* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
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* reserved.
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*
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of Cavium Networks nor the names of
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* its contributors may be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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* This Software, including technical data, may be subject to U.S. export control
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* laws, including the U.S. Export Administration Act and its associated
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* regulations, and may be subject to export or import regulations in other
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* countries.
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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* AND WITH ALL FAULTS AND CAVIUM NETWORKS MAKES NO PROMISES, REPRESENTATIONS OR
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* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT TO
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* THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY REPRESENTATION OR
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* DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT DEFECTS, AND CAVIUM
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* SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES OF TITLE,
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* MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR PURPOSE, LACK OF
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* VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT, QUIET POSSESSION OR
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* CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK ARISING OUT OF USE OR
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* PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
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***********************license end**************************************/
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/**
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* @file
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*
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* Functions for SGMII initialization, configuration,
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* and monitoring.
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*
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* <hr>$Revision: 52004 $<hr>
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*/
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#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
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#include <asm/octeon/cvmx.h>
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#include <asm/octeon/cvmx-config.h>
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#include <asm/octeon/cvmx-clock.h>
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#ifdef CVMX_ENABLE_PKO_FUNCTIONS
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#include <asm/octeon/cvmx-helper.h>
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#include <asm/octeon/cvmx-helper-board.h>
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#endif
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#include <asm/octeon/cvmx-pcsx-defs.h>
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#include <asm/octeon/cvmx-gmxx-defs.h>
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#include <asm/octeon/cvmx-ciu-defs.h>
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#else
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#if !defined(__FreeBSD__) || !defined(_KERNEL)
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#include "executive-config.h"
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#include "cvmx-config.h"
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#ifdef CVMX_ENABLE_PKO_FUNCTIONS
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#include "cvmx.h"
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#include "cvmx-sysinfo.h"
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#include "cvmx-mdio.h"
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#include "cvmx-helper.h"
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#include "cvmx-helper-board.h"
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#endif
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#else
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#include "cvmx.h"
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#include "cvmx-sysinfo.h"
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#include "cvmx-mdio.h"
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#include "cvmx-helper.h"
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#include "cvmx-helper-board.h"
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#endif
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#endif
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#ifdef CVMX_ENABLE_PKO_FUNCTIONS
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/**
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* @INTERNAL
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* Perform initialization required only once for an SGMII port.
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*
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* @param interface Interface to init
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* @param index Index of prot on the interface
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*
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* @return Zero on success, negative on failure
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*/
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static int __cvmx_helper_sgmii_hardware_init_one_time(int interface, int index)
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{
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const uint64_t clock_mhz = cvmx_clock_get_rate(CVMX_CLOCK_SCLK) / 1000000;
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cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
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cvmx_pcsx_linkx_timer_count_reg_t pcsx_linkx_timer_count_reg;
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cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
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/* Disable GMX */
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gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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gmxx_prtx_cfg.s.en = 0;
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
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/* Write PCS*_LINK*_TIMER_COUNT_REG[COUNT] with the appropriate
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value. 1000BASE-X specifies a 10ms interval. SGMII specifies a 1.6ms
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interval. */
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pcsx_miscx_ctl_reg.u64 = cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
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pcsx_linkx_timer_count_reg.u64 = cvmx_read_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface));
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if (pcsx_miscx_ctl_reg.s.mode)
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{
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/* 1000BASE-X */
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pcsx_linkx_timer_count_reg.s.count = (10000ull * clock_mhz) >> 10;
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}
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else
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{
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/* SGMII */
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pcsx_linkx_timer_count_reg.s.count = (1600ull * clock_mhz) >> 10;
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}
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cvmx_write_csr(CVMX_PCSX_LINKX_TIMER_COUNT_REG(index, interface), pcsx_linkx_timer_count_reg.u64);
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/* Write the advertisement register to be used as the
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tx_Config_Reg<D15:D0> of the autonegotiation.
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In 1000BASE-X mode, tx_Config_Reg<D15:D0> is PCS*_AN*_ADV_REG.
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In SGMII PHY mode, tx_Config_Reg<D15:D0> is PCS*_SGM*_AN_ADV_REG.
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In SGMII MAC mode, tx_Config_Reg<D15:D0> is the fixed value 0x4001, so
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this step can be skipped. */
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if (pcsx_miscx_ctl_reg.s.mode)
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{
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/* 1000BASE-X */
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cvmx_pcsx_anx_adv_reg_t pcsx_anx_adv_reg;
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pcsx_anx_adv_reg.u64 = cvmx_read_csr(CVMX_PCSX_ANX_ADV_REG(index, interface));
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pcsx_anx_adv_reg.s.rem_flt = 0;
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pcsx_anx_adv_reg.s.pause = 3;
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pcsx_anx_adv_reg.s.hfd = 1;
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pcsx_anx_adv_reg.s.fd = 1;
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cvmx_write_csr(CVMX_PCSX_ANX_ADV_REG(index, interface), pcsx_anx_adv_reg.u64);
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}
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else
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{
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if (pcsx_miscx_ctl_reg.s.mac_phy)
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{
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/* PHY Mode */
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cvmx_pcsx_sgmx_an_adv_reg_t pcsx_sgmx_an_adv_reg;
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pcsx_sgmx_an_adv_reg.u64 = cvmx_read_csr(CVMX_PCSX_SGMX_AN_ADV_REG(index, interface));
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pcsx_sgmx_an_adv_reg.s.link = 1;
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pcsx_sgmx_an_adv_reg.s.dup = 1;
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pcsx_sgmx_an_adv_reg.s.speed= 2;
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cvmx_write_csr(CVMX_PCSX_SGMX_AN_ADV_REG(index, interface), pcsx_sgmx_an_adv_reg.u64);
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}
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else
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{
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/* MAC Mode - Nothing to do */
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}
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}
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return 0;
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}
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/**
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* @INTERNAL
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* Initialize the SERTES link for the first time or after a loss
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* of link.
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*
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* @param interface Interface to init
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* @param index Index of prot on the interface
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*
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* @return Zero on success, negative on failure
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*/
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static int __cvmx_helper_sgmii_hardware_init_link(int interface, int index)
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{
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cvmx_pcsx_mrx_control_reg_t control_reg;
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/* Take PCS through a reset sequence.
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PCS*_MR*_CONTROL_REG[PWR_DN] should be cleared to zero.
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Write PCS*_MR*_CONTROL_REG[RESET]=1 (while not changing the value of
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the other PCS*_MR*_CONTROL_REG bits).
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Read PCS*_MR*_CONTROL_REG[RESET] until it changes value to zero. */
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control_reg.u64 = cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
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if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM)
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{
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control_reg.s.reset = 1;
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cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), control_reg.u64);
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if (CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_CONTROL_REG(index, interface), cvmx_pcsx_mrx_control_reg_t, reset, ==, 0, 10000))
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{
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cvmx_dprintf("SGMII%d: Timeout waiting for port %d to finish reset\n", interface, index);
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return -1;
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}
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}
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/* Write PCS*_MR*_CONTROL_REG[RST_AN]=1 to ensure a fresh sgmii negotiation starts. */
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control_reg.s.rst_an = 1;
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control_reg.s.an_en = 1;
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control_reg.s.pwr_dn = 0;
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cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), control_reg.u64);
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/* Wait for PCS*_MR*_STATUS_REG[AN_CPT] to be set, indicating that
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sgmii autonegotiation is complete. In MAC mode this isn't an ethernet
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link, but a link between Octeon and the PHY */
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if ((cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
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CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface), cvmx_pcsx_mrx_status_reg_t, an_cpt, ==, 1, 10000))
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{
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//cvmx_dprintf("SGMII%d: Port %d link timeout\n", interface, index);
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return -1;
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}
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return 0;
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}
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/**
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* @INTERNAL
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* Configure an SGMII link to the specified speed after the SERTES
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* link is up.
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*
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* @param interface Interface to init
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* @param index Index of prot on the interface
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* @param link_info Link state to configure
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*
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* @return Zero on success, negative on failure
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*/
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static int __cvmx_helper_sgmii_hardware_init_link_speed(int interface, int index, cvmx_helper_link_info_t link_info)
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{
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int is_enabled;
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cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
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cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
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/* Disable GMX before we make any changes. Remember the enable state */
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gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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is_enabled = gmxx_prtx_cfg.s.en;
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gmxx_prtx_cfg.s.en = 0;
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
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/* Wait for GMX to be idle */
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if (CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface), cvmx_gmxx_prtx_cfg_t, rx_idle, ==, 1, 10000) ||
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CVMX_WAIT_FOR_FIELD64(CVMX_GMXX_PRTX_CFG(index, interface), cvmx_gmxx_prtx_cfg_t, tx_idle, ==, 1, 10000))
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{
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cvmx_dprintf("SGMII%d: Timeout waiting for port %d to be idle\n", interface, index);
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return -1;
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}
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/* Read GMX CFG again to make sure the disable completed */
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gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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/* Get the misc control for PCS. We will need to set the duplication amount */
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pcsx_miscx_ctl_reg.u64 = cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
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/* Use GMXENO to force the link down if the status we get says it should be down */
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pcsx_miscx_ctl_reg.s.gmxeno = !link_info.s.link_up;
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/* Only change the duplex setting if the link is up */
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if (link_info.s.link_up)
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gmxx_prtx_cfg.s.duplex = link_info.s.full_duplex;
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/* Do speed based setting for GMX */
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switch (link_info.s.speed)
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{
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case 10:
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gmxx_prtx_cfg.s.speed = 0;
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gmxx_prtx_cfg.s.speed_msb = 1;
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gmxx_prtx_cfg.s.slottime = 0;
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pcsx_miscx_ctl_reg.s.samp_pt = 25; /* Setting from GMX-603 */
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cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
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cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
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break;
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case 100:
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gmxx_prtx_cfg.s.speed = 0;
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gmxx_prtx_cfg.s.speed_msb = 0;
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gmxx_prtx_cfg.s.slottime = 0;
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pcsx_miscx_ctl_reg.s.samp_pt = 0x5;
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cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
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cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0);
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break;
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case 1000:
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gmxx_prtx_cfg.s.speed = 1;
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gmxx_prtx_cfg.s.speed_msb = 0;
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gmxx_prtx_cfg.s.slottime = 1;
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pcsx_miscx_ctl_reg.s.samp_pt = 1;
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cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 512);
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if (gmxx_prtx_cfg.s.duplex)
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cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); // full duplex
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else
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cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 8192); // half duplex
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break;
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default:
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break;
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}
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/* Write the new misc control for PCS */
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cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), pcsx_miscx_ctl_reg.u64);
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/* Write the new GMX settings with the port still disabled */
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
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/* Read GMX CFG again to make sure the config completed */
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gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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/* Restore the enabled / disabled state */
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gmxx_prtx_cfg.s.en = is_enabled;
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
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return 0;
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}
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/**
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* @INTERNAL
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* Bring up the SGMII interface to be ready for packet I/O but
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* leave I/O disabled using the GMX override. This function
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* follows the bringup documented in 10.6.3 of the manual.
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*
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* @param interface Interface to bringup
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* @param num_ports Number of ports on the interface
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*
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* @return Zero on success, negative on failure
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*/
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static int __cvmx_helper_sgmii_hardware_init(int interface, int num_ports)
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{
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int index;
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/* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be programmed */
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if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0))
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{
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cvmx_ciu_qlm2_t ciu_qlm;
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ciu_qlm.u64 = cvmx_read_csr(CVMX_CIU_QLM2);
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ciu_qlm.s.txbypass = 1;
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ciu_qlm.s.txdeemph = 0xf;
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ciu_qlm.s.txmargin = 0xd;
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cvmx_write_csr(CVMX_CIU_QLM2, ciu_qlm.u64);
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}
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__cvmx_helper_setup_gmx(interface, num_ports);
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for (index=0; index<num_ports; index++)
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{
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int ipd_port = cvmx_helper_get_ipd_port(interface, index);
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__cvmx_helper_sgmii_hardware_init_one_time(interface, index);
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__cvmx_helper_sgmii_link_set(ipd_port, __cvmx_helper_sgmii_link_get(ipd_port));
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}
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return 0;
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}
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/**
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* @INTERNAL
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* Probe a SGMII interface and determine the number of ports
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* connected to it. The SGMII interface should still be down after
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* this call.
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*
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* @param interface Interface to probe
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*
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* @return Number of ports on the interface. Zero to disable.
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*/
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int __cvmx_helper_sgmii_probe(int interface)
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{
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cvmx_gmxx_inf_mode_t mode;
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/* Due to errata GMX-700 on CN56XXp1.x and CN52XXp1.x, the interface
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needs to be enabled before IPD otherwise per port backpressure
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may not work properly */
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mode.u64 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
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mode.s.en = 1;
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cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64);
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return 4;
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}
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/**
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* @INTERNAL
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* Bringup and enable a SGMII interface. After this call packet
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* I/O should be fully functional. This is called with IPD
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* enabled but PKO disabled.
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*
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* @param interface Interface to bring up
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*
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* @return Zero on success, negative on failure
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*/
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int __cvmx_helper_sgmii_enable(int interface)
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{
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int num_ports = cvmx_helper_ports_on_interface(interface);
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int index;
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__cvmx_helper_sgmii_hardware_init(interface, num_ports);
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for (index=0; index<num_ports; index++)
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{
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cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
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gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
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gmxx_prtx_cfg.s.en = 1;
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cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
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}
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return 0;
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}
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/**
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* @INTERNAL
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* Return the link state of an IPD/PKO port as returned by
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* auto negotiation. The result of this function may not match
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* Octeon's link config if auto negotiation has changed since
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* the last call to cvmx_helper_link_set().
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*
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* @param ipd_port IPD/PKO port to query
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*
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* @return Link state
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*/
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cvmx_helper_link_info_t __cvmx_helper_sgmii_link_get(int ipd_port)
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{
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cvmx_helper_link_info_t result;
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cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
|
|
int interface = cvmx_helper_get_interface_num(ipd_port);
|
|
int index = cvmx_helper_get_interface_index_num(ipd_port);
|
|
cvmx_pcsx_mrx_control_reg_t pcsx_mrx_control_reg;
|
|
|
|
result.u64 = 0;
|
|
|
|
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_SIM)
|
|
{
|
|
/* The simulator gives you a simulated 1Gbps full duplex link */
|
|
result.s.link_up = 1;
|
|
result.s.full_duplex = 1;
|
|
result.s.speed = 1000;
|
|
return result;
|
|
}
|
|
|
|
pcsx_mrx_control_reg.u64 = cvmx_read_csr(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 = 1000;
|
|
return result;
|
|
}
|
|
|
|
|
|
pcsx_miscx_ctl_reg.u64 = cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
|
|
if (pcsx_miscx_ctl_reg.s.mode)
|
|
{
|
|
/* 1000BASE-X */
|
|
// FIXME
|
|
}
|
|
else
|
|
{
|
|
if (pcsx_miscx_ctl_reg.s.mac_phy)
|
|
{
|
|
/* PHY Mode */
|
|
cvmx_pcsx_mrx_status_reg_t pcsx_mrx_status_reg;
|
|
cvmx_pcsx_anx_results_reg_t pcsx_anx_results_reg;
|
|
|
|
/* Don't bother continuing if the SERTES low level link is down */
|
|
pcsx_mrx_status_reg.u64 = cvmx_read_csr(CVMX_PCSX_MRX_STATUS_REG(index, interface));
|
|
if (pcsx_mrx_status_reg.s.lnk_st == 0)
|
|
{
|
|
if (__cvmx_helper_sgmii_hardware_init_link(interface, index) != 0)
|
|
return result;
|
|
}
|
|
|
|
/* Read the autoneg results */
|
|
pcsx_anx_results_reg.u64 = cvmx_read_csr(CVMX_PCSX_ANX_RESULTS_REG(index, interface));
|
|
if (pcsx_anx_results_reg.s.an_cpt)
|
|
{
|
|
/* Auto negotiation is complete. Set status accordingly */
|
|
result.s.full_duplex = pcsx_anx_results_reg.s.dup;
|
|
result.s.link_up = pcsx_anx_results_reg.s.link_ok;
|
|
switch (pcsx_anx_results_reg.s.spd)
|
|
{
|
|
case 0:
|
|
result.s.speed = 10;
|
|
break;
|
|
case 1:
|
|
result.s.speed = 100;
|
|
break;
|
|
case 2:
|
|
result.s.speed = 1000;
|
|
break;
|
|
default:
|
|
result.s.speed = 0;
|
|
result.s.link_up = 0;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Auto negotiation isn't complete. Return link down */
|
|
result.s.speed = 0;
|
|
result.s.link_up = 0;
|
|
}
|
|
}
|
|
else /* MAC Mode */
|
|
{
|
|
result = __cvmx_helper_board_link_get(ipd_port);
|
|
}
|
|
}
|
|
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_sgmii_link_set(int ipd_port, cvmx_helper_link_info_t link_info)
|
|
{
|
|
int interface = cvmx_helper_get_interface_num(ipd_port);
|
|
int index = cvmx_helper_get_interface_index_num(ipd_port);
|
|
__cvmx_helper_sgmii_hardware_init_link(interface, index);
|
|
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);
|
|
cvmx_pcsx_mrx_control_reg_t pcsx_mrx_control_reg;
|
|
cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
|
|
|
|
pcsx_mrx_control_reg.u64 = cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
|
|
pcsx_mrx_control_reg.s.loopbck1 = enable_internal;
|
|
cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), pcsx_mrx_control_reg.u64);
|
|
|
|
pcsx_miscx_ctl_reg.u64 = cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
|
|
pcsx_miscx_ctl_reg.s.loopbck2 = enable_external;
|
|
cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), pcsx_miscx_ctl_reg.u64);
|
|
|
|
__cvmx_helper_sgmii_hardware_init_link(interface, index);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* CVMX_ENABLE_PKO_FUNCTIONS */
|