1 files changed, 91 insertions, 0 deletions
diff --git a/drivers/pnp/isapnp/compat.c b/drivers/pnp/isapnp/compat.c
new file mode 100644
index 000000000000..3ff7e76b33bd
--- /dev/null
+++ b/drivers/pnp/isapnp/compat.c
@@ -0,0 +1,91 @@
+/*
+ * compat.c - A series of functions to make it easier to convert drivers that use
+ *            the old isapnp APIs. If possible use the new APIs instead.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ *
+ */
+ 
+/* TODO: see if more isapnp functions are needed here */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/string.h>
+
+static void pnp_convert_id(char *buf, unsigned short vendor, unsigned short device)
+{
+	sprintf(buf, "%c%c%c%x%x%x%x",
+			'A' + ((vendor >> 2) & 0x3f) - 1,
+			'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+			'A' + ((vendor >> 8) & 0x1f) - 1,
+			(device >> 4) & 0x0f,
+			device & 0x0f,
+			(device >> 12) & 0x0f,
+			(device >> 8) & 0x0f);
+}
+
+struct pnp_card *pnp_find_card(unsigned short vendor,
+			       unsigned short device,
+			       struct pnp_card *from)
+{
+	char id[8];
+	char any[8];
+	struct list_head *list;
+	pnp_convert_id(id, vendor, device);
+	pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
+
+	list = from ? from->global_list.next : pnp_cards.next;
+
+	while (list != &pnp_cards) {
+		struct pnp_card *card = global_to_pnp_card(list);
+		if (compare_pnp_id(card->id,id) || (memcmp(id,any,7)==0))
+			return card;
+		list = list->next;
+	}
+	return NULL;
+}
+
+struct pnp_dev *pnp_find_dev(struct pnp_card *card,
+			     unsigned short vendor,
+			     unsigned short function,
+			     struct pnp_dev *from)
+{
+	char id[8];
+	char any[8];
+	pnp_convert_id(id, vendor, function);
+	pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
+	if (card == NULL) {	/* look for a logical device from all cards */
+		struct list_head *list;
+
+		list = pnp_global.next;
+		if (from)
+			list = from->global_list.next;
+
+		while (list != &pnp_global) {
+			struct pnp_dev *dev = global_to_pnp_dev(list);
+			if (compare_pnp_id(dev->id,id) || (memcmp(id,any,7)==0))
+				return dev;
+			list = list->next;
+		}
+	} else {
+		struct list_head *list;
+
+		list = card->devices.next;
+		if (from) {
+			list = from->card_list.next;
+			if (from->card != card)	/* something is wrong */
+				return NULL;
+		}
+		while (list != &card->devices) {
+			struct pnp_dev *dev = card_to_pnp_dev(list);
+			if (compare_pnp_id(dev->id,id))
+				return dev;
+			list = list->next;
+		}
+	}
+	return NULL;
+}
+
+EXPORT_SYMBOL(pnp_find_card);
+EXPORT_SYMBOL(pnp_find_dev);