FreeBSD/Linux Kernel Cross Reference
sys/mips/nlm/board_cpld.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2003-2012 Broadcom Corporation
      * 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 BROADCOM ``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 BROADCOM 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/endian.h>
    
    #include <mips/nlm/hal/mips-extns.h>
    #include <mips/nlm/hal/haldefs.h>
    #include <mips/nlm/hal/iomap.h>
    #include <mips/nlm/hal/gbu.h>
    
    #include <mips/nlm/board.h>
    
    #define CPLD_REVISION           0x0
    #define CPLD_RESET              0x1
    #define CPLD_CTRL               0x2
    #define CPLD_RSVD               0x3
    #define CPLD_PWR_CTRL           0x4
    #define CPLD_MISC               0x5
    #define CPLD_CTRL_STATUS        0x6
    #define CPLD_PWR_INTR_STATUS    0x7
    #define CPLD_DATA               0x8
    
    static __inline
    int nlm_cpld_read(uint64_t base, int reg)
    {
            uint16_t val;
    
            val = *(volatile uint16_t *)(long)(base + reg * 2);
            return le16toh(val);
    }
    
    static __inline void
    nlm_cpld_write(uint64_t base, int reg, uint16_t data)
    {
            data = htole16(data);
            *(volatile uint16_t *)(long)(base + reg * 2) = data;
    }
    
    int
    nlm_board_cpld_majorversion(uint64_t base)
    {
            return (nlm_cpld_read(base, CPLD_REVISION) >> 8);
    }
    
    int
    nlm_board_cpld_minorversion(uint64_t base)
    {
            return (nlm_cpld_read(base, CPLD_REVISION) & 0xff);
    }
    
    uint64_t nlm_board_cpld_base(int node, int chipselect)
    {
            uint64_t gbubase, cpld_phys;
    
            gbubase = nlm_get_gbu_regbase(node);
            cpld_phys = nlm_read_gbu_reg(gbubase, GBU_CS_BASEADDR(chipselect));
            return (MIPS_PHYS_TO_KSEG1(cpld_phys << 8));
    }
    
    void
    nlm_board_cpld_reset(uint64_t base)
    {
    
            nlm_cpld_write(base, CPLD_RESET, 1 << 15);
            for(;;)
                    __asm __volatile("wait");
    }
    
   /* get daughter board type */
   int
   nlm_board_cpld_dboard_type(uint64_t base, int slot)
   {
           uint16_t val;
           int shift = 0;
   
           switch (slot) {
           case 0: shift = 0; break;
           case 1: shift = 4; break;
           case 2: shift = 2; break;
           case 3: shift = 6; break;
           }
           val = nlm_cpld_read(base, CPLD_CTRL_STATUS) >> shift;
           return (val & 0x3);
   }

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