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kernel/linux-rt-4.4.41/arch/mips/include/asm/octeon/cvmx-spi.h 8.93 KB
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  /***********************license start***************
   * Author: Cavium Networks
   *
   * Contact: support@caviumnetworks.com
   * 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__ */