From: Ley Foon Tan Date: Mon, 26 Apr 2021 03:35:05 +0000 (+0800) Subject: mmc: dw_mmc: Fixes data read when receiving DTO interrupt in FIFO mode X-Git-Url: http://git.dujemihanovic.xyz/?a=commitdiff_plain;h=8cb9d3ed3a6402f984356988c581546866acf0da;p=u-boot.git mmc: dw_mmc: Fixes data read when receiving DTO interrupt in FIFO mode The data read is not working when using FIFO mode. From DesignWare databook, when a Data_Transfer_Over (DTO) interrupt is received, the software should read the remaining data from FIFO. Add DTO interrupt checking on data read path and clear interrupts before start reading from FIFO. So, it doesn't clear the next pending interrupts unintentionally after read from FIFO. Signed-off-by: Ley Foon Tan Reviewed-by: Jaehoon Chung --- diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index 7c8a312fa7..a949dad574 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -166,7 +166,9 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data) if (host->fifo_mode && size) { len = 0; if (data->flags == MMC_DATA_READ && - (mask & DWMCI_INTMSK_RXDR)) { + (mask & (DWMCI_INTMSK_RXDR | DWMCI_INTMSK_DTO))) { + dwmci_writel(host, DWMCI_RINTSTS, + DWMCI_INTMSK_RXDR | DWMCI_INTMSK_DTO); while (size) { ret = dwmci_fifo_ready(host, DWMCI_FIFO_EMPTY, @@ -182,8 +184,6 @@ static int dwmci_data_transfer(struct dwmci_host *host, struct mmc_data *data) dwmci_readl(host, DWMCI_DATA); size = size > len ? (size - len) : 0; } - dwmci_writel(host, DWMCI_RINTSTS, - DWMCI_INTMSK_RXDR); } else if (data->flags == MMC_DATA_WRITE && (mask & DWMCI_INTMSK_TXDR)) { while (size) {