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authorDaniel Mack <daniel@caiaq.de>2010-04-06 10:52:44 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-02 10:21:25 -0700
commitf4b01c2be53befd8374d1569e1ae10bf9648025a (patch)
treea4d7b26de8c8bcb4f251f2fdd875eea865d6b5c5
parent1e2894c496bbb024c457d2240559631f12efd019 (diff)
libertas/sdio: 8686: set ECSI bit for 1-bit transfers
commit 8a64c0f6b7ec7f758c4ef445e49f479e27fa2236 upstream. When operating in 1-bit mode, SDAT1 is used as dedicated interrupt line. However, the 8686 will only drive this line when the ECSI bit is set in the CCCR_IF register. Thanks to Alagu Sankar for pointing me in the right direction. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Alagu Sankar <alagusankar@embwise.com> Cc: Volker Ernst <volker.ernst@txtr.com> Cc: Dan Williams <dcbw@redhat.com> Cc: John W. Linville <linville@tuxdriver.com> Cc: Holger Schurig <hs4233@mail.mn-solutions.de> Cc: Bing Zhao <bzhao@marvell.com> Cc: libertas-dev@lists.infradead.org Cc: linux-wireless@vger.kernel.org Cc: linux-mmc@vger.kernel.org Acked-by: Dan Williams <dcbw@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/net/wireless/libertas/if_sdio.c22
-rw-r--r--include/linux/mmc/sdio.h2
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 485a8d406525..f876d0251c92 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -34,6 +34,8 @@
#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"
@@ -883,6 +885,7 @@ 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);
@@ -963,6 +966,25 @@ 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;
diff --git a/include/linux/mmc/sdio.h b/include/linux/mmc/sdio.h
index 47ba464f5170..118f0295a575 100644
--- a/include/linux/mmc/sdio.h
+++ b/include/linux/mmc/sdio.h
@@ -94,6 +94,8 @@
#define SDIO_BUS_WIDTH_1BIT 0x00
#define SDIO_BUS_WIDTH_4BIT 0x02
+#define SDIO_BUS_ECSI 0x20 /* Enable continuous SPI interrupt */
+#define SDIO_BUS_SCSI 0x40 /* Support continuous SPI interrupt */
#define SDIO_BUS_CD_DISABLE 0x80 /* disable pull-up on DAT3 (pin 1) */