Hi Kristoffer & David.
Following is a very naive implementation of
a fake idprom for leon.
This is only for inspiration as I hope
that it is possible to find the MAC address
somehow so we present it correct.
One advantage of using a fake idprom is that all places
that do access idprom no longer needs to be ifdeffed out.
Today floppy.h reads idprom unconditionally.
Sam
diff --git a/arch/sparc/prom/misc_32.c b/arch/sparc/prom/misc_32.c
index 4d61c54..ee5fe45 100644
--- a/arch/sparc/prom/misc_32.c
+++ b/arch/sparc/prom/misc_32.c
@@ -10,7 +10,9 @@
#include <linux/sched.h>
#include <linux/module.h>
+#include <asm/machines.h>
#include <asm/openprom.h>
+#include <asm/idprom.h>
#include <asm/oplib.h>
#include <asm/auxio.h>
#include <asm/system.h>
@@ -93,6 +95,42 @@ prom_setsync(sfunc_t funcp)
*romvec->pv_synchook = funcp;
}
+#ifdef CONFIG_SPARC_LEON
+/*
+ * leon do not have idprom support - so fake it.
+ * The machine type is hardcoded to M_LEON
+ * We do not know the ethernet address so it is all-zero.
+ */
+
+/* Calculate the IDPROM checksum (xor of the data bytes). */
+static unsigned char calc_idprom_cksum(struct idprom *idprom)
+{
+ unsigned char cksum, i, *ptr = (unsigned char *)idprom;
+
+ for (i = cksum = 0; i <= 0x0E; i++)
+ cksum ^= *ptr++;
+
+ return cksum;
+}
+
+unsigned char
+prom_get_idprom(char *idbuf, int num_bytes)
+{
+ struct idprom *idprom;
+
+ if (num_bytes < sizeof(struct idprom))
+ return 0xff;
+
+ idprom = (struct idprom *)idbuf;
+ memset(idprom, 0, sizeof(*idprom));
+ idprom->id_format = 0x01;
+ idprom->id_machtype = M_LEON | M_LEON3_SOC;
+ idprom->id_cksum = calc_idprom_cksum(idprom);
+
+ return 0x01;
+}
+
+#else
/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
* format type. 'num_bytes' is the number of bytes that your idbuf
* has space for. Returns 0xff on error.
@@ -109,7 +147,7 @@ prom_get_idprom(char *idbuf, int num_bytes)
return 0xff;
}
-
+#endif
/* Get the major prom version number. */
int
prom_version(void)
--
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