libertas: check for old, unsupported hardware

Signed-off-by: Holger Schurig <hs4233@mail.mn-solutions.de>
Acked-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c
index 6870276259e9..9d6ca7fe9539 100644
--- a/drivers/net/wireless/libertas/if_cs.c
+++ b/drivers/net/wireless/libertas/if_cs.c
@@ -268,6 +268,12 @@ static int if_cs_poll_while_fw_download(struct if_cs_card *card, uint addr, u8 r
 #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                                       */
@@ -861,6 +867,12 @@ static int if_cs_probe(struct pcmcia_device *p_dev)
                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);