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authorOded Gabbay <ogabbay@advaoptical.com>2013-06-27 20:00:05 +0400
committerChris Ball <cjb@laptop.org>2013-07-05 20:46:30 +0400
commit66b50a00992dca97b442e016a9b2dba892e2df61 (patch)
tree764fbe455ac9fffafd04f0778d673601ca786d16 /drivers/mmc/host/sdhci-esdhc.h
parent7c4f10ac5a940b3994be7f1801a606f8605e7a69 (diff)
downloadlinux-66b50a00992dca97b442e016a9b2dba892e2df61.tar.xz
mmc: esdhc: Add support for 8-bit bus width and non-removable card
This patch adds support of connecting an MMC media using an 8-bit bus width connection to Freescale's P2020 H/W SDHC controller. During the probe function, the generic function mmc_of_parse is called to detect whether the controller is configured with 8-bit bus width. Also, the generic function detects if the non-removable property is set in the device tree. The function esdhc_pltfm_bus_width was added because the bus width configuration is platform specific. Signed-off-by: Oded Gabbay <ogabbay@advaoptical.com> Reviewed-by: Anton Vorontsov <anton@enomsg.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc.h')
-rw-r--r--drivers/mmc/host/sdhci-esdhc.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index 6f16406c37cd..a2a06420e463 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -36,6 +36,13 @@
/* pltfm-specific */
#define ESDHC_HOST_CONTROL_LE 0x20
+/*
+ * P2020 interpretation of the SDHCI_HOST_CONTROL register
+ */
+#define ESDHC_CTRL_4BITBUS (0x1 << 1)
+#define ESDHC_CTRL_8BITBUS (0x2 << 1)
+#define ESDHC_CTRL_BUSWIDTH_MASK (0x3 << 1)
+
/* OF-specific */
#define ESDHC_DMA_SYSCTL 0x40c
#define ESDHC_DMA_SNOOP 0x00000040