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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
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*
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*
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Cavium Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
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* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
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***********************license end**************************************/
/**
* @file
*
* Functions for SGMII initialization, configuration,
* and monitoring.
*
* <hr>$Revision: 52004 $<hr>
*/
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include <asm/octeon/cvmx.h>
#include <asm/octeon/cvmx-config.h>
#include <asm/octeon/cvmx-clock.h>
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
#include <asm/octeon/cvmx-helper.h>
#include <asm/octeon/cvmx-helper-board.h>
#endif
#include <asm/octeon/cvmx-pcsx-defs.h>
#include <asm/octeon/cvmx-gmxx-defs.h>
#include <asm/octeon/cvmx-ciu-defs.h>
#else
#if !defined(__FreeBSD__) || !defined(_KERNEL)
#include "executive-config.h"
#include "cvmx-config.h"
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
#include "cvmx.h"
#include "cvmx-sysinfo.h"
#include "cvmx-mdio.h"
#include "cvmx-helper.h"
#include "cvmx-helper-board.h"
#endif
#else
#include "cvmx.h"
#include "cvmx-sysinfo.h"
#include "cvmx-mdio.h"
#include "cvmx-helper.h"
#include "cvmx-helper-board.h"
#endif
#endif
#ifdef CVMX_ENABLE_PKO_FUNCTIONS
/**
* @INTERNAL
* Perform initialization required only once for an SGMII port.
*
* @param interface 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 uint64_t clock_mhz = cvmx_clock_get_rate(CVMX_CLOCK_SCLK) / 1000000;
cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
cvmx_pcsx_linkx_timer_count_reg_t pcsx_linkx_timer_count_reg;
cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
/* Disable GMX */
gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
gmxx_prtx_cfg.s.en = 0;
cvmx_write_csr(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 = cvmx_read_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface));
pcsx_linkx_timer_count_reg.u64 = cvmx_read_csr(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;
}
cvmx_write_csr(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 */
cvmx_pcsx_anx_adv_reg_t pcsx_anx_adv_reg;
pcsx_anx_adv_reg.u64 = cvmx_read_csr(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;
cvmx_write_csr(CVMX_PCSX_ANX_ADV_REG(index, interface), pcsx_anx_adv_reg.u64);
}
else
{
if (pcsx_miscx_ctl_reg.s.mac_phy)
{
/* PHY Mode */
cvmx_pcsx_sgmx_an_adv_reg_t pcsx_sgmx_an_adv_reg;
pcsx_sgmx_an_adv_reg.u64 = cvmx_read_csr(CVMX_PCSX_SGMX_AN_ADV_REG(index, interface));
pcsx_sgmx_an_adv_reg.s.link = 1;
pcsx_sgmx_an_adv_reg.s.dup = 1;
pcsx_sgmx_an_adv_reg.s.speed= 2;
cvmx_write_csr(CVMX_PCSX_SGMX_AN_ADV_REG(index, interface), pcsx_sgmx_an_adv_reg.u64);
}
else
{
/* MAC Mode - Nothing to do */
}
}
return 0;
}
/**
* @INTERNAL
* Initialize the SERTES link for the first time or after a loss
* of link.
*
* @param interface 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)
{
cvmx_pcsx_mrx_control_reg_t control_reg;
/* 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 = cvmx_read_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface));
if (cvmx_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM)
{
control_reg.s.reset = 1;
cvmx_write_csr(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))
{
cvmx_dprintf("SGMII%d: 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. */
control_reg.s.rst_an = 1;
control_reg.s.an_en = 1;
control_reg.s.pwr_dn = 0;
cvmx_write_csr(CVMX_PCSX_MRX_CONTROL_REG(index, interface), control_reg.u64);
/* 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_sysinfo_get()->board_type != CVMX_BOARD_TYPE_SIM) &&
CVMX_WAIT_FOR_FIELD64(CVMX_PCSX_MRX_STATUS_REG(index, interface), cvmx_pcsx_mrx_status_reg_t, an_cpt, ==, 1, 10000))
{
//cvmx_dprintf("SGMII%d: 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 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;
cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
cvmx_pcsx_miscx_ctl_reg_t pcsx_miscx_ctl_reg;
/* Disable GMX before we make any changes. Remember the enable state */
gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
is_enabled = gmxx_prtx_cfg.s.en;
gmxx_prtx_cfg.s.en = 0;
cvmx_write_csr(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))
{
cvmx_dprintf("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 = cvmx_read_csr(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 = cvmx_read_csr(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;
pcsx_miscx_ctl_reg.s.samp_pt = 25; /* Setting from GMX-603 */
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
cvmx_write_csr(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;
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 64);
cvmx_write_csr(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;
cvmx_write_csr(CVMX_GMXX_TXX_SLOT(index, interface), 512);
if (gmxx_prtx_cfg.s.duplex)
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 0); // full duplex
else
cvmx_write_csr(CVMX_GMXX_TXX_BURST(index, interface), 8192); // half duplex
break;
default:
break;
}
/* Write the new misc control for PCS */
cvmx_write_csr(CVMX_PCSX_MISCX_CTL_REG(index, interface), pcsx_miscx_ctl_reg.u64);
/* Write the new GMX settings with the port still disabled */
cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmxx_prtx_cfg.u64);
/* Read GMX CFG again to make sure the config completed */
gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
/* Restore the enabled / disabled state */
gmxx_prtx_cfg.s.en = is_enabled;
cvmx_write_csr(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 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;
/* CN63XX Pass 1.0 errata G-14395 requires the QLM De-emphasis be programmed */
if (OCTEON_IS_MODEL(OCTEON_CN63XX_PASS1_0))
{
cvmx_ciu_qlm2_t ciu_qlm;
ciu_qlm.u64 = cvmx_read_csr(CVMX_CIU_QLM2);
ciu_qlm.s.txbypass = 1;
ciu_qlm.s.txdeemph = 0xf;
ciu_qlm.s.txmargin = 0xd;
cvmx_write_csr(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);
__cvmx_helper_sgmii_hardware_init_one_time(interface, index);
__cvmx_helper_sgmii_link_set(ipd_port, __cvmx_helper_sgmii_link_get(ipd_port));
}
return 0;
}
/**
* @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 interface Interface to probe
*
* @return Number of ports on the interface. Zero to disable.
*/
int __cvmx_helper_sgmii_probe(int interface)
{
cvmx_gmxx_inf_mode_t mode;
/* 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 = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
mode.s.en = 1;
cvmx_write_csr(CVMX_GMXX_INF_MODE(interface), mode.u64);
return 4;
}
/**
* @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 interface Interface to bring up
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_sgmii_enable(int interface)
{
int num_ports = cvmx_helper_ports_on_interface(interface);
int index;
__cvmx_helper_sgmii_hardware_init(interface, num_ports);
for (index=0; index<num_ports; index++)
{
cvmx_gmxx_prtx_cfg_t gmxx_prtx_cfg;
gmxx_prtx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
gmxx_prtx_cfg.s.en = 1;
cvmx_write_csr(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;
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 */