/***********************license start***************
* Author: Cavium Networks
*
* Contact: [email protected]
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/

/*
*
* This file contains defines for the SPI interface
*/
#ifndef __CVMX_SPI_H__
#define __CVMX_SPI_H__

#include <asm/octeon/cvmx-gmxx-defs.h>

/* CSR typedefs have been moved to cvmx-csr-*.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
*
* @interface: Interface to check
* Returns 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.
*
* @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
* @num_ports: Number of SPI ports to configure
*
* Returns 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.
*
* @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, 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
*
* @interface: SPI interface the SPI4000 is connected to
*
* Returns
*/
static inline int cvmx_spi4000_is_present(int interface)
{
return 0;
}

/**
* Initialize the SPI4000 for use
*
* @interface: SPI interface the SPI4000 is connected to
*/
static inline int cvmx_spi4000_initialize(int interface)
{
return 0;
}

/**
* Poll all the SPI4000 port and check its speed
*
* @interface: Interface the SPI4000 is on
* @port: Port to poll (0-9)
* Returns Status of the port. 0=down. All other values the port is up.
*/
static inline union cvmx_gmxx_rxx_rx_inbnd cvmx_spi4000_check_speed(
int interface,
int port)
{
union cvmx_gmxx_rxx_rx_inbnd r;
r.u64 = 0;
return r;
}

/**
* Get current SPI4 initialization callbacks
*
* @callbacks: Pointer to the callbacks structure.to fill
*
* Returns Pointer to cvmx_spi_callbacks_t structure.
*/
extern void cvmx_spi_get_callbacks(cvmx_spi_callbacks_t *callbacks);

/**
* Set new SPI4 initialization callbacks
*
* @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
*
* @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)
*/
extern int cvmx_spi_reset_cb(int interface, cvmx_spi_mode_t mode);

/**
* Callback to setup calendar and miscellaneous settings before clock
* detection
*
* @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).
* @num_ports: Number of ports to configure on SPI
*
* Returns 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
*
* @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)
*/
extern int cvmx_spi_clock_detect_cb(int interface, cvmx_spi_mode_t mode,
int timeout);

/**
* 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)
*/
extern int cvmx_spi_training_cb(int interface, cvmx_spi_mode_t mode,
int timeout);

/**
* 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)
*/
extern int cvmx_spi_calendar_sync_cb(int interface, cvmx_spi_mode_t mode,
int timeout);

/**
* 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)
*/
extern int cvmx_spi_interface_up_cb(int interface, cvmx_spi_mode_t mode);

#endif /* __CVMX_SPI_H__ */