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/***********************license start***********************************
* Copyright (c) 2003-2017 Cavium Inc. (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
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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 Inc. 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 laws, including the U.S. Export Administration Act and its
* associated regulations, and may be subject to export or import
* regulations in other countries.
*
* TO THE MAXIMUM EXTENT PERMITTED BY LAW, THE SOFTWARE IS PROVIDED "AS IS"
* AND WITH ALL FAULTS AND CAVIUM INC. MAKES NO PROMISES, REPRESENTATIONS OR
* WARRANTIES, EITHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, WITH RESPECT
* TO THE SOFTWARE, INCLUDING ITS CONDITION, ITS CONFORMITY TO ANY
* REPRESENTATION OR DESCRIPTION, OR THE EXISTENCE OF ANY LATENT OR PATENT
* DEFECTS, AND CAVIUM SPECIFICALLY DISCLAIMS ALL IMPLIED (IF ANY) WARRANTIES
* OF TITLE, MERCHANTABILITY, NONINFRINGEMENT, FITNESS FOR A PARTICULAR
* PURPOSE, LACK OF VIRUSES, ACCURACY OR COMPLETENESS, QUIET ENJOYMENT,
* QUIET POSSESSION OR CORRESPONDENCE TO DESCRIPTION. THE ENTIRE RISK
* ARISING OUT OF USE OR PERFORMANCE OF THE SOFTWARE LIES WITH YOU.
***********************license end**************************************/
#include <bdk.h>
#include "libbdk-arch/bdk-csrs-gser.h"
#include "libbdk-hal/if/bdk-if.h"
#include "libbdk-hal/bdk-qlm.h"
#include "libbdk-hal/bdk-utils.h"
/* This code is an optional part of the BDK. It is only linked in
if BDK_REQUIRE() needs it */
BDK_REQUIRE_DEFINE(QLM_MARGIN);
typedef union
{
struct
{
uint64_t rx_os_mvalbbd_2 :16;
uint64_t rx_os_mvalbbd_1 :16;
uint64_t reserved_63_32 :32;
} s;
struct
{
uint64_t Qb :6;
uint64_t Q :6;
uint64_t Lb :6; // Spans the two registers
uint64_t L :6;
uint64_t qerr0 :6;
int64_t reserved_63_30 :34;
} f;
uint64_t u;
} rx_os_mvalbbd_t;
int __bdk_disable_ccpi_error_report = 0;
static int convert_to_signed_mag(int source)
{
/* Synopsis encoded sign in an unexpected way. 0=negative and 1=positive
So bit 5 should be 0 for negative numbers, 1 for positive numbers */
if (source < 0)
source = -source;
else
source |= 0x20;
return source;
}
static rx_os_mvalbbd_t get_current_settings(bdk_node_t node, int qlm, int qlm_lane)
{
rx_os_mvalbbd_t mvalbbd;
mvalbbd.u = 0;
BDK_CSR_INIT(rx_cfg_1, node, BDK_GSERX_LANEX_RX_CFG_1(qlm, qlm_lane));
if (!rx_cfg_1.s.pcs_sds_rx_os_men)
{
/* Get the current settings */
BDK_CSR_INIT(rx_os_out_1, node, BDK_GSERX_LANEX_RX_OS_OUT_1(qlm, qlm_lane));
BDK_CSR_INIT(rx_os_out_2, node, BDK_GSERX_LANEX_RX_OS_OUT_2(qlm, qlm_lane));
BDK_CSR_INIT(rx_os_out_3, node, BDK_GSERX_LANEX_RX_OS_OUT_3(qlm, qlm_lane));
int qerr0 = bdk_extracts(rx_os_out_1.u, 0, 6);
int lb = bdk_extracts(rx_os_out_2.u, 0, 6);
int l = bdk_extracts(rx_os_out_2.u, 6, 6);
int qb = bdk_extracts(rx_os_out_3.u, 0, 6);
int q = bdk_extracts(rx_os_out_3.u, 6, 6);
/* Enable the override with the current values */
mvalbbd.f.Qb = convert_to_signed_mag(qb);
mvalbbd.f.Q = convert_to_signed_mag(q);
mvalbbd.f.Lb = convert_to_signed_mag(lb);
mvalbbd.f.L = convert_to_signed_mag(l);
mvalbbd.f.qerr0 = convert_to_signed_mag(qerr0);
}
else
{
BDK_CSR_INIT(mvalbbd_1, node, BDK_GSERX_LANEX_RX_OS_MVALBBD_1(qlm, qlm_lane));
mvalbbd.s.rx_os_mvalbbd_1 = mvalbbd_1.s.pcs_sds_rx_os_mval;
BDK_CSR_INIT(mvalbbd_2, node, BDK_GSERX_LANEX_RX_OS_MVALBBD_2(qlm, qlm_lane));
mvalbbd.s.rx_os_mvalbbd_2 = mvalbbd_2.s.pcs_sds_rx_os_mval;
}
//printf("qerr0=%d, lb=%d, l=%d, qb=%d, q=%d\n",
// mvalbbd.f.qerr0, mvalbbd.f.Lb, mvalbbd.f.L, mvalbbd.f.Qb, mvalbbd.f.Q);
return mvalbbd;
}
/**
* Get the current RX margining parameter
*
* @param node Node to read margin value from
* @param qlm QLM to read from
* @param qlm_lane Lane to read
* @param margin_type
* Type of margining parameter to read
*
* @return Current margining parameter value
*/
int64_t bdk_qlm_margin_rx_get(bdk_node_t node, int qlm, int qlm_lane, bdk_qlm_margin_t margin_type)
{
rx_os_mvalbbd_t mvalbbd = get_current_settings(node, qlm, qlm_lane);
switch (margin_type)
{
case BDK_QLM_MARGIN_VERTICAL:
if (mvalbbd.f.Q & 0x20) /* Check if sign bit says positive */
return mvalbbd.f.Q & 0x1f; /* positive, strip off sign */
else
return -mvalbbd.f.Q; /* negative */
case BDK_QLM_MARGIN_HORIZONTAL:
return 0;
}
return 0;
}
/**
* Get the current RX margining parameter minimum value
*
* @param node Node to read margin value from
* @param qlm QLM to read from
* @param qlm_lane Lane to read
* @param margin_type
* Type of margining parameter to read
*
* @return Current margining parameter minimum value
*/
int64_t bdk_qlm_margin_rx_get_min(bdk_node_t node, int qlm, int qlm_lane, bdk_qlm_margin_t margin_type)
{
switch (margin_type)
{
case BDK_QLM_MARGIN_VERTICAL:
return -31;
case BDK_QLM_MARGIN_HORIZONTAL:
return 0;
}
return 0;
}
/**
* Get the current RX margining parameter maximum value
*
* @param node Node to read margin value from
* @param qlm QLM to read from
* @param qlm_lane Lane to read
* @param margin_type
* Type of margining parameter to read
*
* @return Current margining parameter maximum value
*/
int64_t bdk_qlm_margin_rx_get_max(bdk_node_t node, int qlm, int qlm_lane, bdk_qlm_margin_t margin_type)
{
switch (margin_type)
{
case BDK_QLM_MARGIN_VERTICAL:
return 31;
case BDK_QLM_MARGIN_HORIZONTAL:
return 0;
}
return 0;
}
/**
* Set the current RX margining parameter value
*
* @param node Node to set margin value on
* @param qlm QLM to set
* @param qlm_lane Lane to set
* @param margin_type
* Type of margining parameter to set
* @param value Value of margining parameter
*
* @return Zero on success, negative on failure
*/
int bdk_qlm_margin_rx_set(bdk_node_t node, int qlm, int qlm_lane, bdk_qlm_margin_t margin_type, int value)
{
rx_os_mvalbbd_t mvalbbd = get_current_settings(node, qlm, qlm_lane);
switch (margin_type)
{
case BDK_QLM_MARGIN_VERTICAL:
if (value < 0)
mvalbbd.f.Q = -value; /* Sign bit is zero, weird Synopsys */
else
mvalbbd.f.Q = value | 0x20; /* Sign bit is one, weird Synopsys */
break;
case BDK_QLM_MARGIN_HORIZONTAL:
return -1;
}
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_RX_OS_MVALBBD_1(qlm, qlm_lane),
c.s.pcs_sds_rx_os_mval = mvalbbd.s.rx_os_mvalbbd_1);
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_RX_OS_MVALBBD_2(qlm, qlm_lane),
c.s.pcs_sds_rx_os_mval = mvalbbd.s.rx_os_mvalbbd_2);
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_RX_CFG_1(qlm, qlm_lane),
c.s.pcs_sds_rx_os_men = 1);
/* Disable the DFE(s), gives a better eye measurement */
BDK_CSR_INIT(pwr_ctrl, node, BDK_GSERX_LANEX_PWR_CTRL(qlm, qlm_lane));
if (!pwr_ctrl.s.rx_lctrl_ovrrd_en)
{
BDK_CSR_WRITE(node, BDK_GSERX_LANEX_RX_LOOP_CTRL(qlm, qlm_lane), 0xF1);
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_PWR_CTRL(qlm, qlm_lane),
c.s.rx_lctrl_ovrrd_en = 1);
}
if (qlm >= 8)
__bdk_disable_ccpi_error_report = 1;
return 0;
}
/**
* Restore the supplied RX margining parameter value as if it was never set. This
* disables any overrides in the SERDES need to perform margining
*
* @param node Node to restore margin value on
* @param qlm QLM to restore
* @param qlm_lane Lane to restore
* @param margin_type
* Type of margining parameter to restore
* @param value Value of margining parameter
*
* @return Zero on success, negative on failure
*/
int bdk_qlm_margin_rx_restore(bdk_node_t node, int qlm, int qlm_lane, bdk_qlm_margin_t margin_type, int value)
{
BDK_CSR_INIT(rx_cfg_1, node, BDK_GSERX_LANEX_RX_CFG_1(qlm, qlm_lane));
/* Return if no overrides have been applied */
if (!rx_cfg_1.s.pcs_sds_rx_os_men)
return 0;
bdk_qlm_margin_rx_set(node, qlm, qlm_lane, margin_type, value);
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_RX_CFG_1(qlm, qlm_lane),
c.s.pcs_sds_rx_os_men = 0);
/* Enable the DFE(s) */
BDK_CSR_MODIFY(c, node, BDK_GSERX_LANEX_PWR_CTRL(qlm, qlm_lane),
c.s.rx_lctrl_ovrrd_en = 0);
__bdk_disable_ccpi_error_report = 0;
return 0;
}
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