From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ludovic Barre Subject: [PATCH V2 5/5] mmc: mmci: add busy detect for stm32 sdmmc variant Date: Fri, 26 Apr 2019 09:46:38 +0200 Message-ID: <1556264798-18540-6-git-send-email-ludovic.Barre@st.com> References: <1556264798-18540-1-git-send-email-ludovic.Barre@st.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1556264798-18540-1-git-send-email-ludovic.Barre@st.com> Sender: linux-kernel-owner@vger.kernel.org To: Ulf Hansson , Rob Herring Cc: srinivas.kandagatla@linaro.org, Maxime Coquelin , Alexandre Torgue , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-mmc@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, Ludovic Barre List-Id: devicetree@vger.kernel.org From: Ludovic Barre This patch enables busy detection for stm32 sdmmc which requires to set data timer to define the busy timeout. sdmmc has 2 flags: -busyd0: inverted value of d0 line. -busyd0end which indicates only end of busy following a cmd response. Only one interrupt on busyd0end. Signed-off-by: Ludovic Barre --- drivers/mmc/host/mmci.c | 4 ++++ drivers/mmc/host/mmci.h | 1 + 2 files changed, 5 insertions(+) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 8dcb980..02a3cdd 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -264,6 +264,10 @@ static struct variant_data variant_stm32_sdmmc = { .datalength_bits = 25, .datactrl_blocksz = 14, .stm32_idmabsize_mask = GENMASK(12, 5), + .busy_detect = true, + .busy_timeout = true, + .busy_detect_flag = MCI_STM32_BUSYD0, + .busy_detect_mask = MCI_STM32_BUSYD0ENDMASK, .init = sdmmc_variant_init, }; diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index b43a958..ac19de8 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -167,6 +167,7 @@ #define MCI_ST_CARDBUSY (1 << 24) /* Extended status bits for the STM32 variants */ #define MCI_STM32_BUSYD0 BIT(20) +#define MCI_STM32_BUSYD0END BIT(21) #define MMCICLEAR 0x038 #define MCI_CMDCRCFAILCLR (1 << 0) -- 2.7.4