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authorUlf Hansson <ulf.hansson@linaro.org>2020-03-10 14:49:43 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2020-03-11 18:10:36 +0300
commit1292e3efb149ee21d8d33d725eeed4e6b1ade963 (patch)
treee375eda7693fba3c2b0fecf600114413573e9fea /include
parent31e43f31890ca6e909b27dcb539252b46aa465da (diff)
downloadlinux-1292e3efb149ee21d8d33d725eeed4e6b1ade963.tar.xz
mmc: core: Allow host controllers to require R1B for CMD6
It has turned out that some host controllers can't use R1B for CMD6 and other commands that have R1B associated with them. Therefore invent a new host cap, MMC_CAP_NEED_RSP_BUSY to let them specify this. In __mmc_switch(), let's check the flag and use it to prevent R1B responses from being converted into R1. Note that, this also means that the host are on its own, when it comes to manage the busy timeout. Suggested-by: Sowjanya Komatineni <skomatineni@nvidia.com> Cc: <stable@vger.kernel.org> Tested-by: Anders Roxell <anders.roxell@linaro.org> Tested-by: Sowjanya Komatineni <skomatineni@nvidia.com> Tested-by: Faiz Abbas <faiz_abbas@ti.com> Tested-By: Peter Geis <pgwipeout@gmail.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/mmc/host.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index ba703384bea0..4c5eb3aa8e72 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -333,6 +333,7 @@ struct mmc_host {
MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 | \
MMC_CAP_UHS_DDR50)
#define MMC_CAP_SYNC_RUNTIME_PM (1 << 21) /* Synced runtime PM suspends. */
+#define MMC_CAP_NEED_RSP_BUSY (1 << 22) /* Commands with R1B can't use R1. */
#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 */