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/***********************license start***************
* Copyright (c) 2003-2010 Cavium Networks (support@cavium.com). All rights
* reserved.
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* 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 Networks nor the names of
* its contributors may be used to endorse or promote products
* derived from this software without specific prior written
* permission.
* This Software, including technical data, may be subject to U.S. export control
* 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 NETWORKS 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
*
* This file contains defines for the SPI interface
* <hr>$Revision: 49448 $<hr>
*
*
*/
#ifndef __CVMX_SPI_H__
#define __CVMX_SPI_H__
#ifdef CVMX_BUILD_FOR_LINUX_KERNEL
#include "cvmx-gmxx-defs.h"
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* CSR typedefs have been moved to cvmx-spi-defs.h */
typedef enum
{
CVMX_SPI_MODE_UNKNOWN = 0,
CVMX_SPI_MODE_TX_HALFPLEX = 1,
CVMX_SPI_MODE_RX_HALFPLEX = 2,
CVMX_SPI_MODE_DUPLEX = 3
} cvmx_spi_mode_t;
/** Callbacks structure to customize SPI4 initialization sequence */
typedef struct
{
/** Called to reset SPI4 DLL */
int (*reset_cb)(int interface, cvmx_spi_mode_t mode);
/** Called to setup calendar */
int (*calendar_setup_cb)(int interface, cvmx_spi_mode_t mode, int num_ports);
/** Called for Tx and Rx clock detection */
int (*clock_detect_cb)(int interface, cvmx_spi_mode_t mode, int timeout);
/** Called to perform link training */
int (*training_cb)(int interface, cvmx_spi_mode_t mode, int timeout);
/** Called for calendar data synchronization */
int (*calendar_sync_cb)(int interface, cvmx_spi_mode_t mode, int timeout);
/** Called when interface is up */
int (*interface_up_cb)(int interface, cvmx_spi_mode_t mode);
} cvmx_spi_callbacks_t;
/**
* Return true if the supplied interface is configured for SPI
*
* @param interface Interface to check
* @return True if interface is SPI
*/
static inline int cvmx_spi_is_spi_interface(int interface)
{
uint64_t gmxState = cvmx_read_csr(CVMX_GMXX_INF_MODE(interface));
return ((gmxState & 0x2) && (gmxState & 0x1));
}
/**
* 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.
*/
extern int cvmx_spi_start_interface(int interface, cvmx_spi_mode_t mode, int timeout, int num_ports);
/**
* This routine restarts the SPI interface after it has lost synchronization
* with its corespondant 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.
*/
extern int cvmx_spi_restart_interface(int interface, cvmx_spi_mode_t mode, int timeout);
/**
* Return non-zero if the SPI interface has a SPI4000 attached
*
* @param interface SPI interface the SPI4000 is connected to
*
* @return
*/
extern int cvmx_spi4000_is_present(int interface);
/**
* Initialize the SPI4000 for use
*
* @param interface SPI interface the SPI4000 is connected to
*/
extern int cvmx_spi4000_initialize(int interface);
/**
* Poll all the SPI4000 port and check its speed
*
* @param interface Interface the SPI4000 is on
* @param port Port to poll (0-9)
* @return Status of the port. 0=down. All other values the port is up.
*/
extern cvmx_gmxx_rxx_rx_inbnd_t cvmx_spi4000_check_speed(int interface, int port);
/**
* Get current SPI4 initialization callbacks
*
* @param callbacks Pointer to the callbacks structure.to fill
*
* @return Pointer to cvmx_spi_callbacks_t structure.
*/
extern void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t * callbacks);
/**
* Set new SPI4 initialization callbacks
*
* @param new_callbacks Pointer to an updated callbacks structure.
*/
extern void cvmx_spi_set_callbacks(cvmx_spi_callbacks_t * new_callbacks);
/**
* 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)
*/
extern int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode);
/**
* 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)
*/
extern int cvmx_spi_calendar_setup_cb(int interface, cvmx_spi_mode_t mode, int num_ports);
/**
* 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)
*/
extern int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode, int timeout);
/**
* 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)
*/
extern int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode, int timeout);
/**
* 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)
*/
extern int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode, int timeout);
/**
* 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)
*/
extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* __CVMX_SPI_H__ */
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