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-rw-r--r--kernel/drivers/isdn/sc/shmem.c138
1 files changed, 138 insertions, 0 deletions
diff --git a/kernel/drivers/isdn/sc/shmem.c b/kernel/drivers/isdn/sc/shmem.c
new file mode 100644
index 000000000..d24506ceb
--- /dev/null
+++ b/kernel/drivers/isdn/sc/shmem.c
@@ -0,0 +1,138 @@
+/* $Id: shmem.c,v 1.2.10.1 2001/09/23 22:24:59 kai Exp $
+ *
+ * Copyright (C) 1996 SpellCaster Telecommunications Inc.
+ *
+ * Card functions implementing ISDN4Linux functionality
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * For more information, please contact gpl-info@spellcast.com or write:
+ *
+ * SpellCaster Telecommunications Inc.
+ * 5621 Finch Avenue East, Unit #3
+ * Scarborough, Ontario Canada
+ * M1B 2T9
+ * +1 (416) 297-8565
+ * +1 (416) 297-6433 Facsimile
+ */
+
+#include "includes.h" /* This must be first */
+#include "hardware.h"
+#include "card.h"
+
+/*
+ *
+ */
+void memcpy_toshmem(int card, void *dest, const void *src, size_t n)
+{
+ unsigned long flags;
+ unsigned char ch;
+ unsigned long dest_rem = ((unsigned long) dest) % 0x4000;
+
+ if (!IS_VALID_CARD(card)) {
+ pr_debug("Invalid param: %d is not a valid card id\n", card);
+ return;
+ }
+
+ if (n > SRAM_PAGESIZE)
+ return;
+
+ /*
+ * determine the page to load from the address
+ */
+ ch = (unsigned long) dest / SRAM_PAGESIZE;
+ pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
+ /*
+ * Block interrupts and load the page
+ */
+ spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+ outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+ sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+ memcpy_toio((void __iomem *)(sc_adapter[card]->rambase + dest_rem), src, n);
+ spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+ pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
+ ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
+ pr_debug("%s: copying %zu bytes from %#lx to %#lx\n",
+ sc_adapter[card]->devicename, n,
+ (unsigned long) src,
+ sc_adapter[card]->rambase + ((unsigned long) dest % 0x4000));
+}
+
+/*
+ * Reverse of above
+ */
+void memcpy_fromshmem(int card, void *dest, const void *src, size_t n)
+{
+ unsigned long flags;
+ unsigned char ch;
+
+ if (!IS_VALID_CARD(card)) {
+ pr_debug("Invalid param: %d is not a valid card id\n", card);
+ return;
+ }
+
+ if (n > SRAM_PAGESIZE) {
+ return;
+ }
+
+ /*
+ * determine the page to load from the address
+ */
+ ch = (unsigned long) src / SRAM_PAGESIZE;
+ pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
+
+
+ /*
+ * Block interrupts and load the page
+ */
+ spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+ outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+ sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+ memcpy_fromio(dest, (void *)(sc_adapter[card]->rambase +
+ ((unsigned long) src % 0x4000)), n);
+ spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+ pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
+ ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
+/* pr_debug("%s: copying %d bytes from %#x to %#x\n",
+ sc_adapter[card]->devicename, n,
+ sc_adapter[card]->rambase + ((unsigned long) src %0x4000), (unsigned long) dest); */
+}
+
+#if 0
+void memset_shmem(int card, void *dest, int c, size_t n)
+{
+ unsigned long flags;
+ unsigned char ch;
+
+ if (!IS_VALID_CARD(card)) {
+ pr_debug("Invalid param: %d is not a valid card id\n", card);
+ return;
+ }
+
+ if (n > SRAM_PAGESIZE) {
+ return;
+ }
+
+ /*
+ * determine the page to load from the address
+ */
+ ch = (unsigned long) dest / SRAM_PAGESIZE;
+ pr_debug("%s: loaded page %d\n", sc_adapter[card]->devicename, ch);
+
+ /*
+ * Block interrupts and load the page
+ */
+ spin_lock_irqsave(&sc_adapter[card]->lock, flags);
+
+ outb(((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80,
+ sc_adapter[card]->ioport[sc_adapter[card]->shmem_pgport]);
+ memset_io(sc_adapter[card]->rambase +
+ ((unsigned long) dest % 0x4000), c, n);
+ pr_debug("%s: set page to %#x\n", sc_adapter[card]->devicename,
+ ((sc_adapter[card]->shmem_magic + ch * SRAM_PAGESIZE) >> 14) | 0x80);
+ spin_unlock_irqrestore(&sc_adapter[card]->lock, flags);
+}
+#endif /* 0 */