drivers/isdn/sc/shmem.c

   1 /* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
   2  *
   3  * Copyright (C) 1996  SpellCaster Telecommunications Inc.
   4  *
   5  * Card functions implementing ISDN4Linux functionality
   6  *
   7  * This software may be used and distributed according to the terms
   8  * of the GNU General Public License, incorporated herein by reference.
   9  *
  10  * For more information, please contact gpl-info@spellcast.com or write:
  11  *
  12  *     SpellCaster Telecommunications Inc.
  13  *     5621 Finch Avenue East, Unit #3
  14  *     Scarborough, Ontario  Canada
  15  *     M1B 2T9
  16  *     +1 (416) 297-8565
  17  *     +1 (416) 297-6433 Facsimile
  18  */
  19
  20 #include "includes.h"           /* This must be first */
  21 #include "hardware.h"
  22 #include "card.h"
  23
  24 /*
  25  *
  26  */
  27 void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
  28 {
  29         unsigned long flags;
  30         unsigned char ch;
  31
  32         if(!IS_VALID_CARD(card)) {
  33                 pr_debug("Invalid param: %d is not a valid card id\n", card);
  34                 return;
  35         }
  36
  37         if(n > SRAM_PAGESIZE) {
  38                 return;
  39         }
  40
  41         /*
  42          * determine the page to load from the address
  43          */
  44         ch = (unsigned long) dest / SRAM_PAGESIZE;
  45         pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
  46         /*
  47          * Block interrupts and load the page
  48          */
  49         spin_lock_irqsave(&sc_adapter[card]->lock, flags);
  50
  51         outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
  52                 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
  53         memcpy_toio(sc_adapter[card]->rambase +
  54                 ((unsigned long) dest % 0x4000), src, n);
  55         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
  56         pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
  57                 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
  58         pr_debug("%s: copying %d bytes from %#lx to %#lx\n",
  59                 sc_adapter[card]->devicename, n,
  60                 (unsigned long) src,
  61                 sc_adapter[card]->rambase + ((unsigned long) dest %0x4000));
  62 }
  63
  64 /*
  65  * Reverse of above
  66  */
  67 void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
  68 {
  69         unsigned long flags;
  70         unsigned char ch;
  71
  72         if(!IS_VALID_CARD(card)) {
  73                 pr_debug("Invalid param: %d is not a valid card id\n", card);
  74                 return;
  75         }
  76
  77         if(n > SRAM_PAGESIZE) {
  78                 return;
  79         }
  80
  81         /*
  82          * determine the page to load from the address
  83          */
  84         ch = (unsigned long) src / SRAM_PAGESIZE;
  85         pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename,ch);
  86
  87
  88         /*
  89          * Block interrupts and load the page
  90          */
  91         spin_lock_irqsave(&sc_adapter[card]->lock, flags);
  92
  93         outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
  94                 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
  95         memcpy_fromio(dest,(void *)(sc_adapter[card]->rambase +
  96                 ((unsigned long) src % 0x4000)), n);
  97         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
  98         pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
  99                 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
 100 /*      pr_debug("%s: copying %d bytes from %#x to %#x\n",
 101                 sc_adapter[card]->devicename, n,
 102                 sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
 103 }
 104
 105 #if 0
 106 void memset_shmem(int card, void *dest, int c, size_t n)
 107 {
 108         unsigned long flags;
 109         unsigned char ch;
 110
 111         if(!IS_VALID_CARD(card)) {
 112                 pr_debug("Invalid param: %d is not a valid card id\n", card);
 113                 return;
 114         }
 115
 116         if(n > SRAM_PAGESIZE) {
 117                 return;
 118         }
 119
 120         /*
 121          * determine the page to load from the address
 122          */
 123         ch = (unsigned long) dest / SRAM_PAGESIZE;
 124         pr_debug("%s: loaded page %d\n",sc_adapter[card]->devicename,ch);
 125
 126         /*
 127          * Block interrupts and load the page
 128          */
 129         spin_lock_irqsave(&sc_adapter[card]->lock, flags);
 130
 131         outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
 132                 sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
 133         memset_io(sc_adapter[card]->rambase +
 134                 ((unsigned long) dest % 0x4000), c, n);
 135         pr_debug("%s: set page to %#x\n",sc_adapter[card]->devicename,
 136                 ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE)>>14)|0x80);
 137         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
 138 }
 139 #endif  /*  0  */