270 lines
8.9 KiB
C
270 lines
8.9 KiB
C
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/***********************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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* This file contains defines for the SPI interface
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*/
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#ifndef __CVMX_SPI_H__
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#define __CVMX_SPI_H__
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#include <asm/octeon/cvmx-gmxx-defs.h>
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/* CSR typedefs have been moved to cvmx-csr-*.h */
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typedef enum {
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CVMX_SPI_MODE_UNKNOWN = 0,
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CVMX_SPI_MODE_TX_HALFPLEX = 1,
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CVMX_SPI_MODE_RX_HALFPLEX = 2,
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CVMX_SPI_MODE_DUPLEX = 3
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} cvmx_spi_mode_t;
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/** Callbacks structure to customize SPI4 initialization sequence */
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typedef struct {
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/** Called to reset SPI4 DLL */
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int (*reset_cb) (int interface, cvmx_spi_mode_t mode);
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/** Called to setup calendar */
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int (*calendar_setup_cb) (int interface, cvmx_spi_mode_t mode,
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int num_ports);
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/** Called for Tx and Rx clock detection */
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int (*clock_detect_cb) (int interface, cvmx_spi_mode_t mode,
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int timeout);
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/** Called to perform link training */
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int (*training_cb) (int interface, cvmx_spi_mode_t mode, int timeout);
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/** Called for calendar data synchronization */
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int (*calendar_sync_cb) (int interface, cvmx_spi_mode_t mode,
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int timeout);
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/** Called when interface is up */
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int (*interface_up_cb) (int interface, cvmx_spi_mode_t mode);
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} cvmx_spi_callbacks_t;
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/**
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* Return true if the supplied interface is configured for SPI
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*
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* @interface: Interface to check
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* Returns True if interface is SPI
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*/
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static inline int cvmx_spi_is_spi_interface(int interface)
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{
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uint64_t gmxState = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
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return (gmxState & 0x2) && (gmxState & 0x1);
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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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extern int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode,
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int timeout, int num_ports);
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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 corespondant 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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* Returns Zero on success, negative of failure.
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*/
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extern int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode,
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int timeout);
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/**
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* Return non-zero if the SPI interface has a SPI4000 attached
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*
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* @interface: SPI interface the SPI4000 is connected to
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*
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* Returns
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*/
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static inline int cvmx_spi4000_is_present(int interface)
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{
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return 0;
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}
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/**
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* Initialize the SPI4000 for use
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*
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* @interface: SPI interface the SPI4000 is connected to
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*/
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static inline int cvmx_spi4000_initialize(int interface)
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{
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return 0;
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}
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/**
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* Poll all the SPI4000 port and check its speed
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*
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* @interface: Interface the SPI4000 is on
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* @port: Port to poll (0-9)
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* Returns Status of the port. 0=down. All other values the port is up.
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*/
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static inline union cvmx_gmxx_rxx_rx_inbnd cvmx_spi4000_check_speed(
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int interface,
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int port)
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{
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union cvmx_gmxx_rxx_rx_inbnd r;
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r.u64 = 0;
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return r;
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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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extern void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks);
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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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extern void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t *new_callbacks);
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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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extern int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode);
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/**
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* Callback to setup calendar and miscellaneous settings before clock
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* 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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extern 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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* Callback to perform 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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* @timeout: Timeout to wait for clock synchronization in seconds
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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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extern int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode,
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int timeout);
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/**
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* Callback to perform link training
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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 link to be trained (in seconds)
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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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extern int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode,
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int timeout);
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/**
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* Callback to perform calendar data synchronization
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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 calendar data in seconds
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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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extern int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode,
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int timeout);
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/**
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* Callback to handle interface up
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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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extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode);
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#endif /* __CVMX_SPI_H__ */
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