Prepare RFID compilation in firmware mode

- switch from linked lists to static arrays 
- remove all non-handle dynamic allocations (at the expense of stack)
- declare all proto/reader/asic/layer2 structures as const
- wrap all handle allocations in macros that expand to references to 
  static structures in case of firmware mode
- update copyright notices
- add skeleton code for openpcd-inside-firmware driver
- update TODO with remaining TODO for firmware mode


git-svn-id: https://svn.gnumonks.org/trunk/librfid@1903 e0336214-984f-0b4b-a45f-81c69e1f0ede

1 files changed, 11 insertions, 15 deletions

diff --git a/src/rfid_layer2.c b/src/rfid_layer2.c
index a6ee43f..ff6d2b0 100644
--- a/src/rfid_layer2.c
+++ b/src/rfid_layer2.c
@@ -24,19 +24,24 @@
 #include <librfid/rfid.h>
 #include <librfid/rfid_layer2.h>
 
-static struct rfid_layer2 *rfid_layer2_list;
+static const struct rfid_layer2 *rfid_layer2s[] = {
+	[RFID_LAYER2_ISO14443A]	= &rfid_layer2_iso14443a,
+	[RFID_LAYER2_ISO14443B]	= &rfid_layer2_iso14443b,
+	[RFID_LAYER2_ISO15693]	= &rfid_layer2_iso15693,
+};
 
 struct rfid_layer2_handle *
 rfid_layer2_init(struct rfid_reader_handle *rh, unsigned int id)
 {
 	struct rfid_layer2 *p;
 
-	for (p = rfid_layer2_list; p; p = p->next)
-		if (p->id == id)
-			return p->fn.init(rh);
+	if (id >= ARRAY_SIZE(rfid_layer2s)) {
+		DEBUGP("unable to find matching layer2 protocol\n");
+		return NULL;
+	}
 
-	DEBUGP("unable to find matching layer2 protocol\n");
-	return NULL;
+	p = rfid_layer2s[id];
+	return p->fn.init(rh);
 }
 
 int
@@ -80,15 +85,6 @@ rfid_layer2_close(struct rfid_layer2_handle *ph)
 }
 
 int
-rfid_layer2_register(struct rfid_layer2 *p)
-{
-	p->next = rfid_layer2_list;
-	rfid_layer2_list = p;
-
-	return 0;
-}
-
-int
 rfid_layer2_getopt(struct rfid_layer2_handle *ph, int optname,
 		   void *optval, unsigned int *optlen)
 {