Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wirel...

[safe/jmp/linux-2.6] / drivers / net / wireless / libertas / if_sdio.c

diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 7d1a3c6..cd464a2 100644 (file)
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -35,6 +35,8 @@
 #include <linux/mmc/card.h>
 #include <linux/mmc/sdio_func.h>
 #include <linux/mmc/sdio_ids.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/host.h>
 
 #include "host.h"
 #include "decl.h"
@@ -943,6 +945,7 @@ static int if_sdio_probe(struct sdio_func *func,
        int ret, i;
        unsigned int model;
        struct if_sdio_packet *packet;
+       struct mmc_host *host = func->card->host;
 
        lbs_deb_enter(LBS_DEB_SDIO);
 
@@ -1023,6 +1026,25 @@ static int if_sdio_probe(struct sdio_func *func,
        if (ret)
                goto disable;
 
+       /* For 1-bit transfers to the 8686 model, we need to enable the
+        * interrupt flag in the CCCR register. Set the MMC_QUIRK_LENIENT_FN0
+        * bit to allow access to non-vendor registers. */
+       if ((card->model == IF_SDIO_MODEL_8686) &&
+           (host->caps & MMC_CAP_SDIO_IRQ) &&
+           (host->ios.bus_width == MMC_BUS_WIDTH_1)) {
+               u8 reg;
+
+               func->card->quirks |= MMC_QUIRK_LENIENT_FN0;
+               reg = sdio_f0_readb(func, SDIO_CCCR_IF, &ret);
+               if (ret)
+                       goto release_int;
+
+               reg |= SDIO_BUS_ECSI;
+               sdio_f0_writeb(func, reg, SDIO_CCCR_IF, &ret);
+               if (ret)
+                       goto release_int;
+       }
+
        card->ioport = sdio_readb(func, IF_SDIO_IOPORT, &ret);
        if (ret)
                goto release_int;