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authorUlf Hansson <ulf.hansson@linaro.org>2017-01-25 14:04:17 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2017-02-13 15:20:44 +0300
commit20f921bb01140207983e9fc3af4bb60f1f9fc0d5 (patch)
tree4de17917f0655132b7f70c59cf6edcd4c2b483ce /include/linux/mmc
parent4e74b6b3c6e9adfe6a8fdebfc56a6416a996d905 (diff)
downloadlinux-20f921bb01140207983e9fc3af4bb60f1f9fc0d5.tar.xz
mmc: core: Invent MMC_CAP_3_3V_DDR
According the JEDEC specification an eMMC card supporting 1.8V vccq in DDR mode should also be capable of 3.3V. However, it's been reported that some mmc hosts supports 3.3V, but not 1.8V. Currently the mmc core implements an error handling when the host fails to set 1.8V for vccq, by falling back to 3.3V. Unfortunate, this seems to be insufficient for some mmc hosts. To enable these to use eMMC DDR mode let's invent a new mmc cap, MMC_CAP_3_3V_DDR, which tells whether they support the eMMC 3.3V DDR mode. In case MMC_CAP_3_3V_DDR is set, but not MMC_CAP_1_8V_DDR, let's change to remain on the 3.3V, as it's the default voltage level for vccq, set by the earlier power up sequence. As this change introduces MMC_CAP_3_3V_DDR, let's take the opportunity to do some re-formatting of the related defines in the header file. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com> Tested-by: Jan Glauber <jglauber@cavium.com> Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Diffstat (limited to 'include/linux/mmc')
-rw-r--r--include/linux/mmc/host.h21
1 files changed, 10 insertions, 11 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 97699d55b2ae..83f1c4a9f03b 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -259,17 +259,16 @@ struct mmc_host {
#define MMC_CAP_NONREMOVABLE (1 << 8) /* Nonremovable e.g. eMMC */
#define MMC_CAP_WAIT_WHILE_BUSY (1 << 9) /* Waits while card is busy */
#define MMC_CAP_ERASE (1 << 10) /* Allow erase/trim commands */
-#define MMC_CAP_1_8V_DDR (1 << 11) /* can support */
- /* DDR mode at 1.8V */
-#define MMC_CAP_1_2V_DDR (1 << 12) /* can support */
- /* DDR mode at 1.2V */
-#define MMC_CAP_POWER_OFF_CARD (1 << 13) /* Can power off after boot */
-#define MMC_CAP_BUS_WIDTH_TEST (1 << 14) /* CMD14/CMD19 bus width ok */
-#define MMC_CAP_UHS_SDR12 (1 << 15) /* Host supports UHS SDR12 mode */
-#define MMC_CAP_UHS_SDR25 (1 << 16) /* Host supports UHS SDR25 mode */
-#define MMC_CAP_UHS_SDR50 (1 << 17) /* Host supports UHS SDR50 mode */
-#define MMC_CAP_UHS_SDR104 (1 << 18) /* Host supports UHS SDR104 mode */
-#define MMC_CAP_UHS_DDR50 (1 << 19) /* Host supports UHS DDR50 mode */
+#define MMC_CAP_3_3V_DDR (1 << 11) /* Host supports eMMC DDR 3.3V */
+#define MMC_CAP_1_8V_DDR (1 << 12) /* Host supports eMMC DDR 1.8V */
+#define MMC_CAP_1_2V_DDR (1 << 13) /* Host supports eMMC DDR 1.2V */
+#define MMC_CAP_POWER_OFF_CARD (1 << 14) /* Can power off after boot */
+#define MMC_CAP_BUS_WIDTH_TEST (1 << 15) /* CMD14/CMD19 bus width ok */
+#define MMC_CAP_UHS_SDR12 (1 << 16) /* Host supports UHS SDR12 mode */
+#define MMC_CAP_UHS_SDR25 (1 << 17) /* Host supports UHS SDR25 mode */
+#define MMC_CAP_UHS_SDR50 (1 << 18) /* Host supports UHS SDR50 mode */
+#define MMC_CAP_UHS_SDR104 (1 << 19) /* Host supports UHS SDR104 mode */
+#define MMC_CAP_UHS_DDR50 (1 << 20) /* Host supports UHS DDR50 mode */
#define MMC_CAP_DRIVER_TYPE_A (1 << 23) /* Host supports Driver Type A */
#define MMC_CAP_DRIVER_TYPE_C (1 << 24) /* Host supports Driver Type C */
#define MMC_CAP_DRIVER_TYPE_D (1 << 25) /* Host supports Driver Type D */