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         unsigned long dest_rem = ((unsigned long) dest) % 0x4000;
  32
  33         if (!IS_VALID_CARD(card)) {
  34                 pr_debug("Invalid param: %d is not a valid card id\n", card);
  35                 return;
  36         }
  37
  38         if (n > SRAM_PAGESIZE)
  39                 return;
  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((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
  54         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
  55         pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
  56                  ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
  57         pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
  58                  sc_adapter[card]->devicename, n,
  59                  (unsigned long) src,
  60                  sc_adapter[card]->rambase + ((unsigned long) dest % 0x4000));
  61 }
  62
  63 /*
  64  * Reverse of above
  65  */
  66 void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
  67 {
  68         unsigned long flags;
  69         unsigned char ch;
  70
  71         if (!IS_VALID_CARD(card)) {
  72                 pr_debug("Invalid param: %d is not a valid card id\n", card);
  73                 return;
  74         }
  75
  76         if (n > SRAM_PAGESIZE) {
  77                 return;
  78         }
  79
  80         /*
  81          * determine the page to load from the address
  82          */
  83         ch = (unsigned long) src / SRAM_PAGESIZE;
  84         pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
  85
  86
  87         /*
  88          * Block interrupts and load the page
  89          */
  90         spin_lock_irqsave(&sc_adapter[card]->lock, flags);
  91
  92         outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
  93              sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
  94         memcpy_fromio(dest, (void *)(sc_adapter[card]->rambase +
  95                                      ((unsigned long) src % 0x4000)), n);
  96         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
  97         pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
  98                  ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
  99 /*      pr_debug("%s: copying %d bytes from %#x to %#x\n",
 100         sc_adapter[card]->devicename, n,
 101         sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
 102 }
 103
 104 #if 0
 105 void memset_shmem(int card, void *dest, int c, size_t n)
 106 {
 107         unsigned long flags;
 108         unsigned char ch;
 109
 110         if (!IS_VALID_CARD(card)) {
 111                 pr_debug("Invalid param: %d is not a valid card id\n", card);
 112                 return;
 113         }
 114
 115         if (n > SRAM_PAGESIZE) {
 116                 return;
 117         }
 118
 119         /*
 120          * determine the page to load from the address
 121          */
 122         ch = (unsigned long) dest / SRAM_PAGESIZE;
 123         pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
 124
 125         /*
 126          * Block interrupts and load the page
 127          */
 128         spin_lock_irqsave(&sc_adapter[card]->lock, flags);
 129
 130         outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
 131              sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
 132         memset_io(sc_adapter[card]->rambase +
 133                   ((unsigned long) dest % 0x4000), c, n);
 134         pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
 135                  ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
 136         spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
 137 }
 138 #endif  /*  0  */