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>

diff --git a/drivers/net/wireless/libertas/if_cs.c b/drivers/net/wireless/libertas/if_cs.c
index 6870276..9d6ca7f 100644 (file)
--- 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);