FreeBSD/Linux Kernel Cross Reference
sys/dev/scc/scc_bfe.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2004-2006 Marcel Moolenaar
      * All rights reserved.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _DEV_SCC_BFE_H_
    #define _DEV_SCC_BFE_H_
    
    #include <sys/serial.h>
    
    /*
     * Bus access structure. This structure holds the minimum information needed
     * to access the SCC. The rclk field, although not important to actually
     * access the SCC, is important for baudrate programming, delay loops and
     * other timing related computations.
     */
    struct scc_bas {
            bus_space_tag_t bst;
            bus_space_handle_t bsh;
            u_int           range;
            u_int           rclk;
            u_int           regshft;
    };
    
    #define scc_regofs(bas, reg)            ((reg) << (bas)->regshft)
    
    #define scc_getreg(bas, reg)            \
            bus_space_read_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg))
    #define scc_setreg(bas, reg, value)     \
            bus_space_write_1((bas)->bst, (bas)->bsh, scc_regofs(bas, reg), value)
    
    #define scc_barrier(bas)                \
            bus_space_barrier((bas)->bst, (bas)->bsh, 0, (bas)->range,      \
                BUS_SPACE_BARRIER_READ|BUS_SPACE_BARRIER_WRITE)
    
    /*
     * SCC mode (child) and channel control structures.
     */
    
    #define SCC_NMODES      3
    #define SCC_ISRCCNT     5
    
    struct scc_chan;
    
    struct scc_mode {
            struct scc_chan *m_chan;
            device_t        m_dev;
    
            u_int           m_mode;
            int             m_attached:1;
            int             m_fastintr:1;
            int             m_hasintr:1;
            int             m_probed:1;
            int             m_sysdev:1;
    
            driver_filter_t *ih;
            serdev_intr_t   *ih_src[SCC_ISRCCNT];
            void            *ih_arg;
    };
    
    struct scc_chan {
            struct resource ch_rres;
            struct resource_list ch_rlist;
    
            struct resource *ch_ires;       /* Interrupt resource. */
            void            *ch_icookie;
            int             ch_irid;
    
            struct scc_mode ch_mode[SCC_NMODES];
    
            u_int           ch_nr;
            int             ch_enabled:1;
            int             ch_sysdev:1;
    
           uint32_t        ch_ipend;
           uint32_t        ch_hwsig;
   };
   
   /*
    * SCC class & instance (=softc)
    */
   struct scc_class {
           KOBJ_CLASS_FIELDS;
           u_int           cl_channels;    /* Number of independent channels. */
           u_int           cl_class;       /* SCC bus class ID. */
           u_int           cl_modes;       /* Supported modes (bitset). */
           int             cl_range;
   };
   
   extern struct scc_class scc_quicc_class;
   extern struct scc_class scc_z8530_escc_class;
   extern struct scc_class scc_z8530_legacy_class;
   
   struct scc_softc {
           KOBJ_FIELDS;
           struct scc_class *sc_class;
           struct scc_bas  sc_bas;
           device_t        sc_dev;
   
           struct mtx      sc_hwmtx;       /* Spinlock protecting hardware. */
   
           struct resource *sc_rres;       /* Register resource. */
           int             sc_rrid;
           int             sc_rtype;       /* SYS_RES_{IOPORT|MEMORY}. */
   
           struct scc_chan *sc_chan;
   
           int             sc_fastintr:1;
           int             sc_leaving:1;
           int             sc_polled:1;
   
           uint32_t        sc_hwsig;       /* Signal state. Used by HW driver. */
   };
   
   extern const char scc_driver_name[];
   
   int scc_bfe_attach(device_t dev, u_int ipc);
   int scc_bfe_detach(device_t dev);
   int scc_bfe_probe(device_t dev, u_int regshft, u_int rclk, u_int rid);
   
   struct resource *scc_bus_alloc_resource(device_t, device_t, int, int *,
       rman_res_t, rman_res_t, rman_res_t, u_int);
   int scc_bus_get_resource(device_t, device_t, int, int, rman_res_t *, rman_res_t *);
   int scc_bus_read_ivar(device_t, device_t, int, uintptr_t *);
   int scc_bus_release_resource(device_t, device_t, int, int, struct resource *);
   int scc_bus_setup_intr(device_t, device_t, struct resource *, int,
       driver_filter_t *, void (*)(void *), void *, void **);
   int scc_bus_teardown_intr(device_t, device_t, struct resource *, void *);
   
   #endif /* _DEV_SCC_BFE_H_ */

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