85129b4bd4
code. Also remove an unnecessary CVMX_ENABLE_DEBUG_PRINTS conditional around what is already a cvmx_dprintf.
671 lines
25 KiB
C
671 lines
25 KiB
C
/***********************license start***************
|
|
* Copyright (c) 2003-2010 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**************************************/
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/**
|
|
* @file
|
|
*
|
|
* Support library for the SPI
|
|
*
|
|
* <hr>$Revision: 70030 $<hr>
|
|
*/
|
|
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
|
|
#include <linux/module.h>
|
|
#include <asm/octeon/cvmx.h>
|
|
#include <asm/octeon/cvmx-config.h>
|
|
#include <asm/octeon/cvmx-spxx-defs.h>
|
|
#include <asm/octeon/cvmx-stxx-defs.h>
|
|
#include <asm/octeon/cvmx-srxx-defs.h>
|
|
#include <asm/octeon/cvmx-pko.h>
|
|
#include <asm/octeon/cvmx-spi.h>
|
|
#include <asm/octeon/cvmx-clock.h>
|
|
#else
|
|
#include "cvmx.h"
|
|
#if !defined(__FreeBSD__) || !defined(_KERNEL)
|
|
#include "cvmx-config.h"
|
|
#endif
|
|
#include "cvmx-sysinfo.h"
|
|
#include "cvmx-pko.h"
|
|
#include "cvmx-spi.h"
|
|
#include "cvmx-clock.h"
|
|
#endif
|
|
|
|
|
|
#define INVOKE_CB(function_p, args...) \
|
|
do { \
|
|
if (function_p) { \
|
|
res = function_p(args); \
|
|
if (res) \
|
|
return res; \
|
|
} \
|
|
} while (0)
|
|
|
|
#if CVMX_ENABLE_DEBUG_PRINTS
|
|
static const char *modes[] = {"UNKNOWN", "TX Halfplex", "Rx Halfplex", "Duplex"};
|
|
#endif
|
|
|
|
/* Default callbacks, can be overridden
|
|
* using cvmx_spi_get_callbacks/cvmx_spi_set_callbacks
|
|
*/
|
|
static cvmx_spi_callbacks_t cvmx_spi_callbacks = {
|
|
.reset_cb = cvmx_spi_reset_cb,
|
|
.calendar_setup_cb = cvmx_spi_calendar_setup_cb,
|
|
.clock_detect_cb = cvmx_spi_clock_detect_cb,
|
|
.training_cb = cvmx_spi_training_cb,
|
|
.calendar_sync_cb = cvmx_spi_calendar_sync_cb,
|
|
.interface_up_cb = cvmx_spi_interface_up_cb
|
|
};
|
|
|
|
/**
|
|
* Get current SPI4 initialization callbacks
|
|
*
|
|
* @param callbacks Pointer to the callbacks structure.to fill
|
|
*
|
|
* @return Pointer to cvmx_spi_callbacks_t structure.
|
|
*/
|
|
void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t * callbacks)
|
|
{
|
|
memcpy(callbacks, &cvmx_spi_callbacks, sizeof(cvmx_spi_callbacks));
|
|
}
|
|
|
|
/**
|
|
* Set new SPI4 initialization callbacks
|
|
*
|
|
* @param new_callbacks Pointer to an updated callbacks structure.
|
|
*/
|
|
void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t * new_callbacks)
|
|
{
|
|
memcpy(&cvmx_spi_callbacks, new_callbacks, sizeof(cvmx_spi_callbacks));
|
|
}
|
|
|
|
/**
|
|
* Initialize and start the SPI interface.
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param timeout Timeout to wait for clock synchronization in seconds
|
|
* @param num_ports Number of SPI ports to configure
|
|
*
|
|
* @return Zero on success, negative of failure.
|
|
*/
|
|
int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode, int timeout, int num_ports)
|
|
{
|
|
int res = -1;
|
|
|
|
if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
|
|
return res;
|
|
|
|
// Callback to perform SPI4 reset
|
|
INVOKE_CB( cvmx_spi_callbacks.reset_cb, interface, mode);
|
|
|
|
// Callback to perform calendar setup
|
|
INVOKE_CB(cvmx_spi_callbacks.calendar_setup_cb, interface, mode, num_ports);
|
|
|
|
// Callback to perform clock detection
|
|
INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
|
|
|
|
// Callback to perform SPI4 link training
|
|
INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
|
|
|
|
// Callback to perform calendar sync
|
|
INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode, timeout);
|
|
|
|
// Callback to handle interface coming up
|
|
INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* This routine restarts the SPI interface after it has lost synchronization
|
|
* with its correspondent system.
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param timeout Timeout to wait for clock synchronization in seconds
|
|
* @return Zero on success, negative of failure.
|
|
*/
|
|
int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode, int timeout)
|
|
{
|
|
int res = -1;
|
|
|
|
|
|
if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
|
|
return res;
|
|
|
|
cvmx_dprintf ("SPI%d: Restart %s\n", interface, modes[mode]);
|
|
|
|
// Callback to perform SPI4 reset
|
|
INVOKE_CB(cvmx_spi_callbacks.reset_cb, interface,mode);
|
|
|
|
// NOTE: Calendar setup is not performed during restart
|
|
// Refer to cvmx_spi_start_interface() for the full sequence
|
|
|
|
// Callback to perform clock detection
|
|
INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
|
|
|
|
// Callback to perform SPI4 link training
|
|
INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
|
|
|
|
// Callback to perform calendar sync
|
|
INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode, timeout);
|
|
|
|
// Callback to handle interface coming up
|
|
INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
|
|
|
|
return res;
|
|
}
|
|
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
|
|
EXPORT_SYMBOL(cvmx_spi_restart_interface);
|
|
#endif
|
|
|
|
/**
|
|
* Callback to perform SPI4 reset
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode)
|
|
{
|
|
cvmx_spxx_dbg_deskew_ctl_t spxx_dbg_deskew_ctl;
|
|
cvmx_spxx_clk_ctl_t spxx_clk_ctl;
|
|
cvmx_spxx_bist_stat_t spxx_bist_stat;
|
|
cvmx_spxx_int_msk_t spxx_int_msk;
|
|
cvmx_stxx_int_msk_t stxx_int_msk;
|
|
cvmx_spxx_trn4_ctl_t spxx_trn4_ctl;
|
|
int index;
|
|
uint64_t MS = cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000;
|
|
|
|
/* Disable SPI error events while we run BIST */
|
|
spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
|
|
cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
|
|
stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
|
|
cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
|
|
|
|
/* Run BIST in the SPI interface */
|
|
cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), 0);
|
|
cvmx_write_csr(CVMX_STXX_COM_CTL(interface), 0);
|
|
spxx_clk_ctl.u64 = 0;
|
|
spxx_clk_ctl.s.runbist = 1;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
|
|
cvmx_wait (10 * MS);
|
|
spxx_bist_stat.u64 = cvmx_read_csr(CVMX_SPXX_BIST_STAT(interface));
|
|
if (spxx_bist_stat.s.stat0)
|
|
cvmx_dprintf("ERROR SPI%d: BIST failed on receive datapath FIFO\n", interface);
|
|
if (spxx_bist_stat.s.stat1)
|
|
cvmx_dprintf("ERROR SPI%d: BIST failed on RX calendar table\n", interface);
|
|
if (spxx_bist_stat.s.stat2)
|
|
cvmx_dprintf("ERROR SPI%d: BIST failed on TX calendar table\n", interface);
|
|
|
|
/* Clear the calendar table after BIST to fix parity errors */
|
|
for (index=0; index<32; index++)
|
|
{
|
|
cvmx_srxx_spi4_calx_t srxx_spi4_calx;
|
|
cvmx_stxx_spi4_calx_t stxx_spi4_calx;
|
|
|
|
srxx_spi4_calx.u64 = 0;
|
|
srxx_spi4_calx.s.oddpar = 1;
|
|
cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface), srxx_spi4_calx.u64);
|
|
|
|
stxx_spi4_calx.u64 = 0;
|
|
stxx_spi4_calx.s.oddpar = 1;
|
|
cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface), stxx_spi4_calx.u64);
|
|
}
|
|
|
|
/* Re enable reporting of error interrupts */
|
|
cvmx_write_csr(CVMX_SPXX_INT_REG(interface), cvmx_read_csr(CVMX_SPXX_INT_REG(interface)));
|
|
cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
|
|
cvmx_write_csr(CVMX_STXX_INT_REG(interface), cvmx_read_csr(CVMX_STXX_INT_REG(interface)));
|
|
cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
|
|
|
|
// Setup the CLKDLY right in the middle
|
|
spxx_clk_ctl.u64 = 0;
|
|
spxx_clk_ctl.s.seetrn = 0;
|
|
spxx_clk_ctl.s.clkdly = 0x10;
|
|
spxx_clk_ctl.s.runbist = 0;
|
|
spxx_clk_ctl.s.statdrv = 0;
|
|
spxx_clk_ctl.s.statrcv = 1; /* This should always be on the opposite edge as statdrv */
|
|
spxx_clk_ctl.s.sndtrn = 0;
|
|
spxx_clk_ctl.s.drptrn = 0;
|
|
spxx_clk_ctl.s.rcvtrn = 0;
|
|
spxx_clk_ctl.s.srxdlck = 0;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
|
|
cvmx_wait (100 * MS);
|
|
|
|
// Reset SRX0 DLL
|
|
spxx_clk_ctl.s.srxdlck = 1;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
|
|
|
|
// Waiting for Inf0 Spi4 RX DLL to lock
|
|
cvmx_wait (100 * MS);
|
|
|
|
// Enable dynamic alignment
|
|
spxx_trn4_ctl.s.trntest = 0;
|
|
spxx_trn4_ctl.s.jitter = 1;
|
|
spxx_trn4_ctl.s.clr_boot = 1;
|
|
spxx_trn4_ctl.s.set_boot = 0;
|
|
if (OCTEON_IS_MODEL(OCTEON_CN58XX))
|
|
spxx_trn4_ctl.s.maxdist = 3;
|
|
else
|
|
spxx_trn4_ctl.s.maxdist = 8;
|
|
spxx_trn4_ctl.s.macro_en = 1;
|
|
spxx_trn4_ctl.s.mux_en = 1;
|
|
cvmx_write_csr (CVMX_SPXX_TRN4_CTL(interface), spxx_trn4_ctl.u64);
|
|
|
|
spxx_dbg_deskew_ctl.u64 = 0;
|
|
cvmx_write_csr (CVMX_SPXX_DBG_DESKEW_CTL(interface), spxx_dbg_deskew_ctl.u64);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Callback to setup calendar and miscellaneous settings before clock detection
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param num_ports Number of ports to configure on SPI
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode, int num_ports)
|
|
{
|
|
int port;
|
|
int index;
|
|
if (mode & CVMX_SPI_MODE_RX_HALFPLEX)
|
|
{
|
|
cvmx_srxx_com_ctl_t srxx_com_ctl;
|
|
cvmx_srxx_spi4_stat_t srxx_spi4_stat;
|
|
|
|
// SRX0 number of Ports
|
|
srxx_com_ctl.u64 = 0;
|
|
srxx_com_ctl.s.prts = num_ports - 1;
|
|
srxx_com_ctl.s.st_en = 0;
|
|
srxx_com_ctl.s.inf_en = 0;
|
|
cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
|
|
|
|
// SRX0 Calendar Table. This round robbins through all ports
|
|
port = 0;
|
|
index = 0;
|
|
while (port < num_ports)
|
|
{
|
|
cvmx_srxx_spi4_calx_t srxx_spi4_calx;
|
|
srxx_spi4_calx.u64 = 0;
|
|
srxx_spi4_calx.s.prt0 = port++;
|
|
srxx_spi4_calx.s.prt1 = port++;
|
|
srxx_spi4_calx.s.prt2 = port++;
|
|
srxx_spi4_calx.s.prt3 = port++;
|
|
srxx_spi4_calx.s.oddpar = ~(cvmx_dpop(srxx_spi4_calx.u64) & 1);
|
|
cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface), srxx_spi4_calx.u64);
|
|
index++;
|
|
}
|
|
srxx_spi4_stat.u64 = 0;
|
|
srxx_spi4_stat.s.len = num_ports;
|
|
srxx_spi4_stat.s.m = 1;
|
|
cvmx_write_csr(CVMX_SRXX_SPI4_STAT(interface), srxx_spi4_stat.u64);
|
|
}
|
|
|
|
if (mode & CVMX_SPI_MODE_TX_HALFPLEX)
|
|
{
|
|
cvmx_stxx_arb_ctl_t stxx_arb_ctl;
|
|
cvmx_gmxx_tx_spi_max_t gmxx_tx_spi_max;
|
|
cvmx_gmxx_tx_spi_thresh_t gmxx_tx_spi_thresh;
|
|
cvmx_gmxx_tx_spi_ctl_t gmxx_tx_spi_ctl;
|
|
cvmx_stxx_spi4_stat_t stxx_spi4_stat;
|
|
cvmx_stxx_spi4_dat_t stxx_spi4_dat;
|
|
|
|
// STX0 Config
|
|
stxx_arb_ctl.u64 = 0;
|
|
stxx_arb_ctl.s.igntpa = 0;
|
|
stxx_arb_ctl.s.mintrn = 0;
|
|
cvmx_write_csr(CVMX_STXX_ARB_CTL(interface), stxx_arb_ctl.u64);
|
|
|
|
gmxx_tx_spi_max.u64 = 0;
|
|
gmxx_tx_spi_max.s.max1 = 8;
|
|
gmxx_tx_spi_max.s.max2 = 4;
|
|
gmxx_tx_spi_max.s.slice = 0;
|
|
cvmx_write_csr(CVMX_GMXX_TX_SPI_MAX(interface), gmxx_tx_spi_max.u64);
|
|
|
|
gmxx_tx_spi_thresh.u64 = 0;
|
|
gmxx_tx_spi_thresh.s.thresh = 4;
|
|
cvmx_write_csr(CVMX_GMXX_TX_SPI_THRESH(interface), gmxx_tx_spi_thresh.u64);
|
|
|
|
gmxx_tx_spi_ctl.u64 = 0;
|
|
gmxx_tx_spi_ctl.s.tpa_clr = 0;
|
|
gmxx_tx_spi_ctl.s.cont_pkt = 0;
|
|
cvmx_write_csr(CVMX_GMXX_TX_SPI_CTL(interface), gmxx_tx_spi_ctl.u64);
|
|
|
|
// STX0 Training Control
|
|
stxx_spi4_dat.u64 = 0;
|
|
stxx_spi4_dat.s.alpha = 32; /*Minimum needed by dynamic alignment*/
|
|
stxx_spi4_dat.s.max_t = 0xFFFF; /*Minimum interval is 0x20*/
|
|
cvmx_write_csr(CVMX_STXX_SPI4_DAT(interface), stxx_spi4_dat.u64);
|
|
|
|
// STX0 Calendar Table. This round robbins through all ports
|
|
port = 0;
|
|
index = 0;
|
|
while (port < num_ports)
|
|
{
|
|
cvmx_stxx_spi4_calx_t stxx_spi4_calx;
|
|
stxx_spi4_calx.u64 = 0;
|
|
stxx_spi4_calx.s.prt0 = port++;
|
|
stxx_spi4_calx.s.prt1 = port++;
|
|
stxx_spi4_calx.s.prt2 = port++;
|
|
stxx_spi4_calx.s.prt3 = port++;
|
|
stxx_spi4_calx.s.oddpar = ~(cvmx_dpop(stxx_spi4_calx.u64) & 1);
|
|
cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface), stxx_spi4_calx.u64);
|
|
index++;
|
|
}
|
|
stxx_spi4_stat.u64 = 0;
|
|
stxx_spi4_stat.s.len = num_ports;
|
|
stxx_spi4_stat.s.m = 1;
|
|
cvmx_write_csr(CVMX_STXX_SPI4_STAT(interface), stxx_spi4_stat.u64);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Callback to perform clock detection
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param timeout Timeout to wait for clock synchronization in seconds
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode, int timeout)
|
|
{
|
|
int clock_transitions;
|
|
cvmx_spxx_clk_stat_t stat;
|
|
uint64_t timeout_time;
|
|
uint64_t MS = cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000;
|
|
|
|
/* Regardless of operating mode, both Tx and Rx clocks must be present
|
|
for the SPI interface to operate. */
|
|
cvmx_dprintf ("SPI%d: Waiting to see TsClk...\n", interface);
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
|
|
/* Require 100 clock transitions in order to avoid any noise in the
|
|
beginning */
|
|
clock_transitions = 100;
|
|
do
|
|
{
|
|
stat.u64 = cvmx_read_csr(CVMX_SPXX_CLK_STAT(interface));
|
|
if (stat.s.s4clk0 && stat.s.s4clk1 && clock_transitions)
|
|
{
|
|
/* We've seen a clock transition, so decrement the number we still
|
|
need */
|
|
clock_transitions--;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
|
|
stat.s.s4clk0 = 0;
|
|
stat.s.s4clk1 = 0;
|
|
}
|
|
if (cvmx_get_cycle() > timeout_time)
|
|
{
|
|
cvmx_dprintf ("SPI%d: Timeout\n", interface);
|
|
return -1;
|
|
}
|
|
} while (stat.s.s4clk0 == 0 || stat.s.s4clk1 == 0);
|
|
|
|
cvmx_dprintf ("SPI%d: Waiting to see RsClk...\n", interface);
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
|
|
/* Require 100 clock transitions in order to avoid any noise in the
|
|
beginning */
|
|
clock_transitions = 100;
|
|
do
|
|
{
|
|
stat.u64 = cvmx_read_csr (CVMX_SPXX_CLK_STAT(interface));
|
|
if (stat.s.d4clk0 && stat.s.d4clk1 && clock_transitions)
|
|
{
|
|
/* We've seen a clock transition, so decrement the number we still
|
|
need */
|
|
clock_transitions--;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
|
|
stat.s.d4clk0 = 0;
|
|
stat.s.d4clk1 = 0;
|
|
}
|
|
if (cvmx_get_cycle() > timeout_time)
|
|
{
|
|
cvmx_dprintf ("SPI%d: Timeout\n", interface);
|
|
return -1;
|
|
}
|
|
} while (stat.s.d4clk0 == 0 || stat.s.d4clk1 == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Callback to perform link training
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param timeout Timeout to wait for link to be trained (in seconds)
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode, int timeout)
|
|
{
|
|
cvmx_spxx_trn4_ctl_t spxx_trn4_ctl;
|
|
cvmx_spxx_clk_stat_t stat;
|
|
uint64_t MS = cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000;
|
|
uint64_t timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
|
|
int rx_training_needed;
|
|
|
|
// SRX0 & STX0 Inf0 Links are configured - begin training
|
|
cvmx_spxx_clk_ctl_t spxx_clk_ctl;
|
|
spxx_clk_ctl.u64 = 0;
|
|
spxx_clk_ctl.s.seetrn = 0;
|
|
spxx_clk_ctl.s.clkdly = 0x10;
|
|
spxx_clk_ctl.s.runbist = 0;
|
|
spxx_clk_ctl.s.statdrv = 0;
|
|
spxx_clk_ctl.s.statrcv = 1; /* This should always be on the opposite edge as statdrv */
|
|
spxx_clk_ctl.s.sndtrn = 1;
|
|
spxx_clk_ctl.s.drptrn = 1;
|
|
spxx_clk_ctl.s.rcvtrn = 1;
|
|
spxx_clk_ctl.s.srxdlck = 1;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
|
|
cvmx_wait (1000 * MS);
|
|
|
|
// SRX0 clear the boot bit
|
|
spxx_trn4_ctl.u64 = cvmx_read_csr(CVMX_SPXX_TRN4_CTL(interface));
|
|
spxx_trn4_ctl.s.clr_boot = 1;
|
|
cvmx_write_csr (CVMX_SPXX_TRN4_CTL(interface), spxx_trn4_ctl.u64);
|
|
|
|
// Wait for the training sequence to complete
|
|
cvmx_dprintf ("SPI%d: Waiting for training\n", interface);
|
|
cvmx_wait (1000 * MS);
|
|
#if !defined(OCTEON_VENDOR_LANNER)
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * 600; /* Wait a really long time here */
|
|
#else
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * 10;
|
|
#endif
|
|
/* The HRM says we must wait for 34 + 16 * MAXDIST training sequences.
|
|
We'll be pessimistic and wait for a lot more */
|
|
rx_training_needed = 500;
|
|
do {
|
|
stat.u64 = cvmx_read_csr (CVMX_SPXX_CLK_STAT(interface));
|
|
if (stat.s.srxtrn && rx_training_needed)
|
|
{
|
|
rx_training_needed--;
|
|
cvmx_write_csr(CVMX_SPXX_CLK_STAT(interface), stat.u64);
|
|
stat.s.srxtrn = 0;
|
|
}
|
|
if (cvmx_get_cycle() > timeout_time)
|
|
{
|
|
cvmx_dprintf ("SPI%d: Timeout\n", interface);
|
|
return -1;
|
|
}
|
|
} while (stat.s.srxtrn == 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Callback to perform calendar data synchronization
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @param timeout Timeout to wait for calendar data in seconds
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode, int timeout)
|
|
{
|
|
uint64_t MS = cvmx_clock_get_rate(CVMX_CLOCK_CORE) / 1000;
|
|
if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
|
|
// SRX0 interface should be good, send calendar data
|
|
cvmx_srxx_com_ctl_t srxx_com_ctl;
|
|
cvmx_dprintf ("SPI%d: Rx is synchronized, start sending calendar data\n", interface);
|
|
srxx_com_ctl.u64 = cvmx_read_csr(CVMX_SRXX_COM_CTL(interface));
|
|
srxx_com_ctl.s.inf_en = 1;
|
|
srxx_com_ctl.s.st_en = 1;
|
|
cvmx_write_csr (CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
|
|
}
|
|
|
|
if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
|
|
// STX0 has achieved sync
|
|
// The corespondant board should be sending calendar data
|
|
// Enable the STX0 STAT receiver.
|
|
cvmx_spxx_clk_stat_t stat;
|
|
uint64_t timeout_time;
|
|
cvmx_stxx_com_ctl_t stxx_com_ctl;
|
|
stxx_com_ctl.u64 = 0;
|
|
stxx_com_ctl.s.st_en = 1;
|
|
cvmx_write_csr (CVMX_STXX_COM_CTL(interface), stxx_com_ctl.u64);
|
|
|
|
// Waiting for calendar sync on STX0 STAT
|
|
cvmx_dprintf ("SPI%d: Waiting to sync on STX[%d] STAT\n", interface, interface);
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
|
|
// SPX0_CLK_STAT - SPX0_CLK_STAT[STXCAL] should be 1 (bit10)
|
|
do {
|
|
stat.u64 = cvmx_read_csr (CVMX_SPXX_CLK_STAT (interface));
|
|
if (cvmx_get_cycle() > timeout_time)
|
|
{
|
|
cvmx_dprintf ("SPI%d: Timeout\n", interface);
|
|
return -1;
|
|
}
|
|
} while (stat.s.stxcal == 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Callback to handle interface up
|
|
*
|
|
* @param interface The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @param mode The operating mode for the SPI interface. The interface
|
|
* can operate as a full duplex (both Tx and Rx data paths
|
|
* active) or as a halfplex (either the Tx data path is
|
|
* active or the Rx data path is active, but not both).
|
|
* @return Zero on success, non-zero error code on failure (will cause SPI initialization to abort)
|
|
*/
|
|
int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode)
|
|
{
|
|
cvmx_gmxx_rxx_frm_min_t gmxx_rxx_frm_min;
|
|
cvmx_gmxx_rxx_frm_max_t gmxx_rxx_frm_max;
|
|
cvmx_gmxx_rxx_jabber_t gmxx_rxx_jabber;
|
|
|
|
if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
|
|
cvmx_srxx_com_ctl_t srxx_com_ctl;
|
|
srxx_com_ctl.u64 = cvmx_read_csr(CVMX_SRXX_COM_CTL(interface));
|
|
srxx_com_ctl.s.inf_en = 1;
|
|
cvmx_write_csr (CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
|
|
cvmx_dprintf ("SPI%d: Rx is now up\n", interface);
|
|
}
|
|
|
|
if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
|
|
cvmx_stxx_com_ctl_t stxx_com_ctl;
|
|
stxx_com_ctl.u64 = cvmx_read_csr(CVMX_STXX_COM_CTL(interface));
|
|
stxx_com_ctl.s.inf_en = 1;
|
|
cvmx_write_csr (CVMX_STXX_COM_CTL(interface), stxx_com_ctl.u64);
|
|
cvmx_dprintf ("SPI%d: Tx is now up\n", interface);
|
|
}
|
|
|
|
gmxx_rxx_frm_min.u64 = 0;
|
|
gmxx_rxx_frm_min.s.len = 64;
|
|
#ifdef OCTEON_VENDOR_RADISYS
|
|
/*
|
|
* Incoming packets on the RSYS4GBE have the FCS stripped.
|
|
*/
|
|
if (cvmx_sysinfo_get()->board_type == CVMX_BOARD_TYPE_CUST_RADISYS_RSYS4GBE)
|
|
gmxx_rxx_frm_min.s.len -= 4;
|
|
#endif
|
|
cvmx_write_csr(CVMX_GMXX_RXX_FRM_MIN(0,interface), gmxx_rxx_frm_min.u64);
|
|
gmxx_rxx_frm_max.u64 = 0;
|
|
gmxx_rxx_frm_max.s.len = 64*1024 - 4;
|
|
cvmx_write_csr(CVMX_GMXX_RXX_FRM_MAX(0,interface), gmxx_rxx_frm_max.u64);
|
|
gmxx_rxx_jabber.u64 = 0;
|
|
gmxx_rxx_jabber.s.cnt = 64*1024 - 4;
|
|
cvmx_write_csr(CVMX_GMXX_RXX_JABBER(0,interface), gmxx_rxx_jabber.u64);
|
|
|
|
return 0;
|
|
}
|
|
|