The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (c) 2003-2012 Broadcom Corporation
    3  * All Rights Reserved
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in
   13  *    the documentation and/or other materials provided with the
   14  *    distribution.
   15  * 
   16  * THIS SOFTWARE IS PROVIDED BY BROADCOM ``AS IS'' AND ANY EXPRESS OR
   17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
   23  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   24  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
   25  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
   26  * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/10.0/sys/mips/nlm/board_cpld.c 255368 2013-09-07 18:26:16Z jchandra $");
   31 #include <sys/param.h>
   32 #include <sys/systm.h>
   33 #include <sys/endian.h>
   34 
   35 #include <mips/nlm/hal/mips-extns.h>
   36 #include <mips/nlm/hal/haldefs.h>
   37 #include <mips/nlm/hal/iomap.h>
   38 #include <mips/nlm/hal/gbu.h>
   39 
   40 #include <mips/nlm/board.h>
   41 
   42 #define CPLD_REVISION           0x0
   43 #define CPLD_RESET              0x1
   44 #define CPLD_CTRL               0x2
   45 #define CPLD_RSVD               0x3
   46 #define CPLD_PWR_CTRL           0x4
   47 #define CPLD_MISC               0x5
   48 #define CPLD_CTRL_STATUS        0x6
   49 #define CPLD_PWR_INTR_STATUS    0x7
   50 #define CPLD_DATA               0x8
   51 
   52 static __inline
   53 int nlm_cpld_read(uint64_t base, int reg)
   54 {
   55         uint16_t val;
   56 
   57         val = *(volatile uint16_t *)(long)(base + reg * 2);
   58         return le16toh(val);
   59 }
   60 
   61 static __inline void
   62 nlm_cpld_write(uint64_t base, int reg, uint16_t data)
   63 {
   64         data = htole16(data);
   65         *(volatile uint16_t *)(long)(base + reg * 2) = data;
   66 }
   67 
   68 int
   69 nlm_board_cpld_majorversion(uint64_t base)
   70 {
   71         return (nlm_cpld_read(base, CPLD_REVISION) >> 8);
   72 }
   73 
   74 int
   75 nlm_board_cpld_minorversion(uint64_t base)
   76 {
   77         return (nlm_cpld_read(base, CPLD_REVISION) & 0xff);
   78 }
   79 
   80 uint64_t nlm_board_cpld_base(int node, int chipselect)
   81 {
   82         uint64_t gbubase, cpld_phys;
   83 
   84         gbubase = nlm_get_gbu_regbase(node);
   85         cpld_phys = nlm_read_gbu_reg(gbubase, GBU_CS_BASEADDR(chipselect));
   86         return (MIPS_PHYS_TO_KSEG1(cpld_phys << 8));
   87 }
   88 
   89 void
   90 nlm_board_cpld_reset(uint64_t base)
   91 {
   92 
   93         nlm_cpld_write(base, CPLD_RESET, 1 << 15);
   94         for(;;)
   95                 __asm __volatile("wait");
   96 }
   97 
   98 /* get daughter board type */
   99 int
  100 nlm_board_cpld_dboard_type(uint64_t base, int slot)
  101 {
  102         uint16_t val;
  103         int shift = 0;
  104 
  105         switch (slot) {
  106         case 0: shift = 0; break;
  107         case 1: shift = 4; break;
  108         case 2: shift = 2; break;
  109         case 3: shift = 6; break;
  110         }
  111         val = nlm_cpld_read(base, CPLD_CTRL_STATUS) >> shift;
  112         return (val & 0x3);
  113 }

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