[PATCH 3/4] libertas: check for old, unsupported hardware

[Holger Schurig]

Signed-off-by: Holger Schurig <hs4233 at mail.mn-solutions.de>

--- linux.orig/drivers/net/wireless/libertas/if_cs.c
+++ linux/drivers/net/wireless/libertas/if_cs.c
@@ -268,6 +268,12 @@
 #define IF_CS_SCRATCH_BOOT_OK		0x00
 #define IF_CS_SCRATCH_HELPER_OK		0x5a
 
+/*
+ * Used to detect ancient chips:
+ */
+#define IF_CS_PRODUCT_ID		0x0000001C
+#define IF_CS_CF8385_B1_REV		0x12
+
 
 /********************************************************************/
 /* I/O and interrupt handling                                       */
@@ -864,6 +871,12 @@
 	       p_dev->irq.AssignedIRQ, p_dev->io.BasePort1,
 	       p_dev->io.BasePort1 + p_dev->io.NumPorts1 - 1);
 
+	/* Check if we have a current silicon */
+	if (if_cs_read8(card, IF_CS_PRODUCT_ID) < IF_CS_CF8385_B1_REV) {
+		lbs_pr_err("old chips like 8385 rev B1 aren't supported\n");
+		ret = -ENODEV;
+		goto out2;
+	}
 
 	/* Load the firmware early, before calling into libertas.ko */
 	ret = if_cs_prog_helper(card);