FreeBSD/Linux Kernel Cross Reference
sys/dev/ichiic/ig4_var.h

     /*
      * Copyright (c) 2014 The DragonFly Project.  All rights reserved.
      *
      * This code is derived from software contributed to The DragonFly Project
      * by Matthew Dillon <dillon@backplane.com> and was subsequently ported
      * to FreeBSD by Michael Gmelin <freebsd@grem.de>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     *
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. 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.
     * 3. Neither the name of The DragonFly Project 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 IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
     * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
     * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
     * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
     * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _ICHIIC_IG4_VAR_H_
    #define _ICHIIC_IG4_VAR_H_
    
    #include "bus_if.h"
    #include "device_if.h"
    #include "pci_if.h"
    #include "iicbus_if.h"
    
    enum ig4_vers {
            IG4_HASWELL,
            IG4_ATOM,
            IG4_SKYLAKE,
            IG4_APL,
            IG4_CANNONLAKE,
            IG4_TIGERLAKE,
            IG4_GEMINILAKE
    };
    
    /* Controller has additional registers */
    #define IG4_HAS_ADDREGS(vers)   ((vers) >= IG4_SKYLAKE)
    
    struct ig4_hw {
            uint32_t        ic_clock_rate;  /* MHz */
            uint32_t        sda_fall_time;  /* nsec */
            uint32_t        scl_fall_time;  /* nsec */
            uint32_t        sda_hold_time;  /* nsec */
            int             txfifo_depth;
            int             rxfifo_depth;
    };
    
    struct ig4_cfg {
            uint32_t        version;
            uint32_t        bus_speed;
            uint16_t        ss_scl_hcnt;
            uint16_t        ss_scl_lcnt;
            uint16_t        ss_sda_hold;
            uint16_t        fs_scl_hcnt;
            uint16_t        fs_scl_lcnt;
            uint16_t        fs_sda_hold;
            int             txfifo_depth;
            int             rxfifo_depth;
    };
    
    struct ig4iic_softc {
            device_t        dev;
            device_t        iicbus;
            struct resource *regs_res;
            int             regs_rid;
            struct resource *intr_res;
            int             intr_rid;
            void            *intr_handle;
            int             intr_type;
            enum ig4_vers   version;
            struct ig4_cfg  cfg;
            uint32_t        intr_mask;
            uint8_t         last_slave;
            int             platform_attached : 1;
            int             use_10bit : 1;
            int             slave_valid : 1;
            int             poll: 1;
    
            /*
            * Locking semantics:
            *
            * Functions implementing the icbus interface that interact
            * with the controller acquire an exclusive lock on call_lock
            * to prevent interleaving of calls to the interface.
            *
            * io_lock is used as condition variable to synchronize active process
            * with the interrupt handler. It should not be used for tasks other
            * than waiting for interrupt and passing parameters to and from
            * it's handler.
            */
           struct sx       call_lock;
           struct mtx      io_lock;
   };
   
   typedef struct ig4iic_softc ig4iic_softc_t;
   
   /* Attach/Detach called from ig4iic_pci_*() */
   int ig4iic_attach(ig4iic_softc_t *sc);
   int ig4iic_detach(ig4iic_softc_t *sc);
   int ig4iic_suspend(ig4iic_softc_t *sc);
   int ig4iic_resume(ig4iic_softc_t *sc);
   
   /* iicbus methods */
   extern iicbus_transfer_t ig4iic_transfer;
   extern iicbus_reset_t   ig4iic_reset;
   extern iicbus_callback_t ig4iic_callback;
   
   #endif /* _ICHIIC_IG4_VAR_H_ */

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