669 lines
22 KiB
C
Executable file
669 lines
22 KiB
C
Executable file
/***********************license start***************
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* Author: Cavium Networks
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*
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* Contact: support@caviumnetworks.com
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* This file is part of the OCTEON SDK
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*
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* Copyright (c) 2003-2008 Cavium Networks
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*
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* This file is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, Version 2, as
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* published by the Free Software Foundation.
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*
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* This file is distributed in the hope that it will be useful, but
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* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
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* NONINFRINGEMENT. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this file; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* or visit http://www.gnu.org/licenses/.
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*
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* This file may also be available under a different license from Cavium.
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* Contact Cavium Networks for more information
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***********************license end**************************************/
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/*
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*
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* Support library for the SPI
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*/
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#include <asm/octeon/octeon.h>
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#include <asm/octeon/cvmx-config.h>
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#include <asm/octeon/cvmx-pko.h>
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#include <asm/octeon/cvmx-spi.h>
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#include <asm/octeon/cvmx-spxx-defs.h>
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#include <asm/octeon/cvmx-stxx-defs.h>
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#include <asm/octeon/cvmx-srxx-defs.h>
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#define INVOKE_CB(function_p, args...) \
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do { \
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if (function_p) { \
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res = function_p(args); \
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if (res) \
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return res; \
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} \
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} while (0)
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#if CVMX_ENABLE_DEBUG_PRINTS
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static const char *modes[] =
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{ "UNKNOWN", "TX Halfplex", "Rx Halfplex", "Duplex" };
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#endif
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/* Default callbacks, can be overridden
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* using cvmx_spi_get_callbacks/cvmx_spi_set_callbacks
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*/
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static cvmx_spi_callbacks_t cvmx_spi_callbacks = {
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.reset_cb = cvmx_spi_reset_cb,
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.calendar_setup_cb = cvmx_spi_calendar_setup_cb,
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.clock_detect_cb = cvmx_spi_clock_detect_cb,
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.training_cb = cvmx_spi_training_cb,
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.calendar_sync_cb = cvmx_spi_calendar_sync_cb,
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.interface_up_cb = cvmx_spi_interface_up_cb
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};
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/**
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* Get current SPI4 initialization callbacks
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*
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* @callbacks: Pointer to the callbacks structure.to fill
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*
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* Returns Pointer to cvmx_spi_callbacks_t structure.
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*/
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void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks)
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{
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memcpy(callbacks, &cvmx_spi_callbacks, sizeof(cvmx_spi_callbacks));
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}
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/**
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* Set new SPI4 initialization callbacks
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*
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* @new_callbacks: Pointer to an updated callbacks structure.
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*/
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void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t *new_callbacks)
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{
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memcpy(&cvmx_spi_callbacks, new_callbacks, sizeof(cvmx_spi_callbacks));
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}
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/**
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* Initialize and start the SPI interface.
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*
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* @interface: The identifier of the packet interface to configure and
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* use as a SPI interface.
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* @mode: The operating mode for the SPI interface. The interface
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* can operate as a full duplex (both Tx and Rx data paths
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* active) or as a halfplex (either the Tx data path is
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* active or the Rx data path is active, but not both).
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* @timeout: Timeout to wait for clock synchronization in seconds
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* @num_ports: Number of SPI ports to configure
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*
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* Returns Zero on success, negative of failure.
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*/
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int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode, int timeout,
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int num_ports)
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{
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int res = -1;
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if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
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return res;
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/* Callback to perform SPI4 reset */
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INVOKE_CB(cvmx_spi_callbacks.reset_cb, interface, mode);
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/* Callback to perform calendar setup */
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INVOKE_CB(cvmx_spi_callbacks.calendar_setup_cb, interface, mode,
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num_ports);
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/* Callback to perform clock detection */
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INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
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/* Callback to perform SPI4 link training */
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INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
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/* Callback to perform calendar sync */
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INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode,
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timeout);
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/* Callback to handle interface coming up */
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INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
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return res;
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}
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/**
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* This routine restarts the SPI interface after it has lost synchronization
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* with its correspondent system.
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*
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* @interface: The identifier of the packet interface to configure and
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* use as a SPI interface.
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* @mode: The operating mode for the SPI interface. The interface
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* can operate as a full duplex (both Tx and Rx data paths
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* active) or as a halfplex (either the Tx data path is
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* active or the Rx data path is active, but not both).
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* @timeout: Timeout to wait for clock synchronization in seconds
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*
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* Returns Zero on success, negative of failure.
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*/
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int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode, int timeout)
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{
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int res = -1;
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if (!(OCTEON_IS_MODEL(OCTEON_CN38XX) || OCTEON_IS_MODEL(OCTEON_CN58XX)))
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return res;
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cvmx_dprintf("SPI%d: Restart %s\n", interface, modes[mode]);
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/* Callback to perform SPI4 reset */
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INVOKE_CB(cvmx_spi_callbacks.reset_cb, interface, mode);
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/* NOTE: Calendar setup is not performed during restart */
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/* Refer to cvmx_spi_start_interface() for the full sequence */
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/* Callback to perform clock detection */
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INVOKE_CB(cvmx_spi_callbacks.clock_detect_cb, interface, mode, timeout);
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/* Callback to perform SPI4 link training */
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INVOKE_CB(cvmx_spi_callbacks.training_cb, interface, mode, timeout);
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/* Callback to perform calendar sync */
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INVOKE_CB(cvmx_spi_callbacks.calendar_sync_cb, interface, mode,
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timeout);
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/* Callback to handle interface coming up */
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INVOKE_CB(cvmx_spi_callbacks.interface_up_cb, interface, mode);
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return res;
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}
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EXPORT_SYMBOL_GPL(cvmx_spi_restart_interface);
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/**
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* Callback to perform SPI4 reset
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*
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* @interface: The identifier of the packet interface to configure and
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* use as a SPI interface.
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* @mode: The operating mode for the SPI interface. The interface
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* can operate as a full duplex (both Tx and Rx data paths
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* active) or as a halfplex (either the Tx data path is
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* active or the Rx data path is active, but not both).
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*
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* Returns Zero on success, non-zero error code on failure (will cause
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* SPI initialization to abort)
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*/
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int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode)
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{
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union cvmx_spxx_dbg_deskew_ctl spxx_dbg_deskew_ctl;
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union cvmx_spxx_clk_ctl spxx_clk_ctl;
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union cvmx_spxx_bist_stat spxx_bist_stat;
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union cvmx_spxx_int_msk spxx_int_msk;
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union cvmx_stxx_int_msk stxx_int_msk;
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union cvmx_spxx_trn4_ctl spxx_trn4_ctl;
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int index;
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uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
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/* Disable SPI error events while we run BIST */
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spxx_int_msk.u64 = cvmx_read_csr(CVMX_SPXX_INT_MSK(interface));
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cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), 0);
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stxx_int_msk.u64 = cvmx_read_csr(CVMX_STXX_INT_MSK(interface));
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cvmx_write_csr(CVMX_STXX_INT_MSK(interface), 0);
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/* Run BIST in the SPI interface */
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cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), 0);
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cvmx_write_csr(CVMX_STXX_COM_CTL(interface), 0);
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spxx_clk_ctl.u64 = 0;
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spxx_clk_ctl.s.runbist = 1;
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cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
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__delay(10 * MS);
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spxx_bist_stat.u64 = cvmx_read_csr(CVMX_SPXX_BIST_STAT(interface));
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if (spxx_bist_stat.s.stat0)
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cvmx_dprintf
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("ERROR SPI%d: BIST failed on receive datapath FIFO\n",
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interface);
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if (spxx_bist_stat.s.stat1)
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cvmx_dprintf("ERROR SPI%d: BIST failed on RX calendar table\n",
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interface);
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if (spxx_bist_stat.s.stat2)
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cvmx_dprintf("ERROR SPI%d: BIST failed on TX calendar table\n",
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interface);
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/* Clear the calendar table after BIST to fix parity errors */
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for (index = 0; index < 32; index++) {
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union cvmx_srxx_spi4_calx srxx_spi4_calx;
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union cvmx_stxx_spi4_calx stxx_spi4_calx;
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srxx_spi4_calx.u64 = 0;
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srxx_spi4_calx.s.oddpar = 1;
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cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface),
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srxx_spi4_calx.u64);
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stxx_spi4_calx.u64 = 0;
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stxx_spi4_calx.s.oddpar = 1;
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cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface),
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stxx_spi4_calx.u64);
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}
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/* Re enable reporting of error interrupts */
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cvmx_write_csr(CVMX_SPXX_INT_REG(interface),
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cvmx_read_csr(CVMX_SPXX_INT_REG(interface)));
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cvmx_write_csr(CVMX_SPXX_INT_MSK(interface), spxx_int_msk.u64);
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cvmx_write_csr(CVMX_STXX_INT_REG(interface),
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cvmx_read_csr(CVMX_STXX_INT_REG(interface)));
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cvmx_write_csr(CVMX_STXX_INT_MSK(interface), stxx_int_msk.u64);
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/* Setup the CLKDLY right in the middle */
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spxx_clk_ctl.u64 = 0;
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spxx_clk_ctl.s.seetrn = 0;
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spxx_clk_ctl.s.clkdly = 0x10;
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spxx_clk_ctl.s.runbist = 0;
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spxx_clk_ctl.s.statdrv = 0;
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/* This should always be on the opposite edge as statdrv */
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spxx_clk_ctl.s.statrcv = 1;
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spxx_clk_ctl.s.sndtrn = 0;
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spxx_clk_ctl.s.drptrn = 0;
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spxx_clk_ctl.s.rcvtrn = 0;
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spxx_clk_ctl.s.srxdlck = 0;
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cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
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__delay(100 * MS);
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/* Reset SRX0 DLL */
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spxx_clk_ctl.s.srxdlck = 1;
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cvmx_write_csr(CVMX_SPXX_CLK_CTL(interface), spxx_clk_ctl.u64);
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/* Waiting for Inf0 Spi4 RX DLL to lock */
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__delay(100 * MS);
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/* Enable dynamic alignment */
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spxx_trn4_ctl.s.trntest = 0;
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spxx_trn4_ctl.s.jitter = 1;
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spxx_trn4_ctl.s.clr_boot = 1;
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spxx_trn4_ctl.s.set_boot = 0;
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if (OCTEON_IS_MODEL(OCTEON_CN58XX))
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spxx_trn4_ctl.s.maxdist = 3;
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else
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spxx_trn4_ctl.s.maxdist = 8;
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spxx_trn4_ctl.s.macro_en = 1;
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spxx_trn4_ctl.s.mux_en = 1;
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cvmx_write_csr(CVMX_SPXX_TRN4_CTL(interface), spxx_trn4_ctl.u64);
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spxx_dbg_deskew_ctl.u64 = 0;
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cvmx_write_csr(CVMX_SPXX_DBG_DESKEW_CTL(interface),
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spxx_dbg_deskew_ctl.u64);
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return 0;
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}
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/**
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* Callback to setup calendar and miscellaneous settings before clock detection
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*
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* @interface: The identifier of the packet interface to configure and
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* use as a SPI interface.
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* @mode: The operating mode for the SPI interface. The interface
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* can operate as a full duplex (both Tx and Rx data paths
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* active) or as a halfplex (either the Tx data path is
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* active or the Rx data path is active, but not both).
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* @num_ports: Number of ports to configure on SPI
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*
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* Returns Zero on success, non-zero error code on failure (will cause
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* SPI initialization to abort)
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*/
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int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode,
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int num_ports)
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{
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int port;
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int index;
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if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
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union cvmx_srxx_com_ctl srxx_com_ctl;
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union cvmx_srxx_spi4_stat srxx_spi4_stat;
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/* SRX0 number of Ports */
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srxx_com_ctl.u64 = 0;
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srxx_com_ctl.s.prts = num_ports - 1;
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srxx_com_ctl.s.st_en = 0;
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srxx_com_ctl.s.inf_en = 0;
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cvmx_write_csr(CVMX_SRXX_COM_CTL(interface), srxx_com_ctl.u64);
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/* SRX0 Calendar Table. This round robbins through all ports */
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port = 0;
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index = 0;
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while (port < num_ports) {
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union cvmx_srxx_spi4_calx srxx_spi4_calx;
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srxx_spi4_calx.u64 = 0;
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srxx_spi4_calx.s.prt0 = port++;
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srxx_spi4_calx.s.prt1 = port++;
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srxx_spi4_calx.s.prt2 = port++;
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srxx_spi4_calx.s.prt3 = port++;
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srxx_spi4_calx.s.oddpar =
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~(cvmx_dpop(srxx_spi4_calx.u64) & 1);
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cvmx_write_csr(CVMX_SRXX_SPI4_CALX(index, interface),
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srxx_spi4_calx.u64);
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index++;
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}
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srxx_spi4_stat.u64 = 0;
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srxx_spi4_stat.s.len = num_ports;
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srxx_spi4_stat.s.m = 1;
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cvmx_write_csr(CVMX_SRXX_SPI4_STAT(interface),
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srxx_spi4_stat.u64);
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}
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if (mode & CVMX_SPI_MODE_TX_HALFPLEX) {
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union cvmx_stxx_arb_ctl stxx_arb_ctl;
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union cvmx_gmxx_tx_spi_max gmxx_tx_spi_max;
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union cvmx_gmxx_tx_spi_thresh gmxx_tx_spi_thresh;
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union cvmx_gmxx_tx_spi_ctl gmxx_tx_spi_ctl;
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union cvmx_stxx_spi4_stat stxx_spi4_stat;
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union cvmx_stxx_spi4_dat stxx_spi4_dat;
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/* STX0 Config */
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stxx_arb_ctl.u64 = 0;
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stxx_arb_ctl.s.igntpa = 0;
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stxx_arb_ctl.s.mintrn = 0;
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cvmx_write_csr(CVMX_STXX_ARB_CTL(interface), stxx_arb_ctl.u64);
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gmxx_tx_spi_max.u64 = 0;
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gmxx_tx_spi_max.s.max1 = 8;
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gmxx_tx_spi_max.s.max2 = 4;
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gmxx_tx_spi_max.s.slice = 0;
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cvmx_write_csr(CVMX_GMXX_TX_SPI_MAX(interface),
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gmxx_tx_spi_max.u64);
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gmxx_tx_spi_thresh.u64 = 0;
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gmxx_tx_spi_thresh.s.thresh = 4;
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cvmx_write_csr(CVMX_GMXX_TX_SPI_THRESH(interface),
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gmxx_tx_spi_thresh.u64);
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gmxx_tx_spi_ctl.u64 = 0;
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gmxx_tx_spi_ctl.s.tpa_clr = 0;
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gmxx_tx_spi_ctl.s.cont_pkt = 0;
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cvmx_write_csr(CVMX_GMXX_TX_SPI_CTL(interface),
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gmxx_tx_spi_ctl.u64);
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/* STX0 Training Control */
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stxx_spi4_dat.u64 = 0;
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/*Minimum needed by dynamic alignment */
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stxx_spi4_dat.s.alpha = 32;
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stxx_spi4_dat.s.max_t = 0xFFFF; /*Minimum interval is 0x20 */
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cvmx_write_csr(CVMX_STXX_SPI4_DAT(interface),
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stxx_spi4_dat.u64);
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/* STX0 Calendar Table. This round robbins through all ports */
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port = 0;
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index = 0;
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while (port < num_ports) {
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union cvmx_stxx_spi4_calx stxx_spi4_calx;
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stxx_spi4_calx.u64 = 0;
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stxx_spi4_calx.s.prt0 = port++;
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stxx_spi4_calx.s.prt1 = port++;
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stxx_spi4_calx.s.prt2 = port++;
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stxx_spi4_calx.s.prt3 = port++;
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stxx_spi4_calx.s.oddpar =
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~(cvmx_dpop(stxx_spi4_calx.u64) & 1);
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cvmx_write_csr(CVMX_STXX_SPI4_CALX(index, interface),
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stxx_spi4_calx.u64);
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index++;
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}
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stxx_spi4_stat.u64 = 0;
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stxx_spi4_stat.s.len = num_ports;
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stxx_spi4_stat.s.m = 1;
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cvmx_write_csr(CVMX_STXX_SPI4_STAT(interface),
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stxx_spi4_stat.u64);
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}
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return 0;
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}
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/**
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|
* Callback to perform clock detection
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|
*
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|
* @interface: The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @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).
|
|
* @timeout: Timeout to wait for clock synchronization in seconds
|
|
*
|
|
* Returns 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;
|
|
union cvmx_spxx_clk_stat stat;
|
|
uint64_t timeout_time;
|
|
uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 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
|
|
*
|
|
* @interface: The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @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).
|
|
* @timeout: Timeout to wait for link to be trained (in seconds)
|
|
*
|
|
* Returns 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)
|
|
{
|
|
union cvmx_spxx_trn4_ctl spxx_trn4_ctl;
|
|
union cvmx_spxx_clk_stat stat;
|
|
uint64_t MS = cvmx_sysinfo_get()->cpu_clock_hz / 1000;
|
|
uint64_t timeout_time = cvmx_get_cycle() + 1000ull * MS * timeout;
|
|
int rx_training_needed;
|
|
|
|
/* SRX0 & STX0 Inf0 Links are configured - begin training */
|
|
union cvmx_spxx_clk_ctl 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;
|
|
/* This should always be on the opposite edge as statdrv */
|
|
spxx_clk_ctl.s.statrcv = 1;
|
|
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);
|
|
__delay(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);
|
|
__delay(1000 * MS);
|
|
/* Wait a really long time here */
|
|
timeout_time = cvmx_get_cycle() + 1000ull * MS * 600;
|
|
/*
|
|
* 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
|
|
*
|
|
* @interface: The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @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).
|
|
* @timeout: Timeout to wait for calendar data in seconds
|
|
*
|
|
* Returns 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_sysinfo_get()->cpu_clock_hz / 1000;
|
|
if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
|
|
/* SRX0 interface should be good, send calendar data */
|
|
union cvmx_srxx_com_ctl 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. */
|
|
union cvmx_spxx_clk_stat stat;
|
|
uint64_t timeout_time;
|
|
union cvmx_stxx_com_ctl 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
|
|
*
|
|
* @interface: The identifier of the packet interface to configure and
|
|
* use as a SPI interface.
|
|
* @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).
|
|
*
|
|
* Returns 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)
|
|
{
|
|
union cvmx_gmxx_rxx_frm_min gmxx_rxx_frm_min;
|
|
union cvmx_gmxx_rxx_frm_max gmxx_rxx_frm_max;
|
|
union cvmx_gmxx_rxx_jabber gmxx_rxx_jabber;
|
|
|
|
if (mode & CVMX_SPI_MODE_RX_HALFPLEX) {
|
|
union cvmx_srxx_com_ctl 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) {
|
|
union cvmx_stxx_com_ctl 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;
|
|
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;
|
|
}
|