From 760177dff4662d000c7b1331ec93b2ea4fbd564e Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 6 Aug 2015 20:16:29 -0600 Subject: dw_mmc: Calculate dwmmc FIFO threshold size if not provided We can calculate this. Add code to do this if it is not provided. panto: prefix changed to dw_mmc to make things easier to grep Signed-off-by: Simon Glass Acked-by: Jaehoon Chung --- drivers/mmc/dw_mmc.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/mmc') diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c index d34e4ee9dd..77b87e0365 100644 --- a/drivers/mmc/dw_mmc.c +++ b/drivers/mmc/dw_mmc.c @@ -373,9 +373,15 @@ static int dwmci_init(struct mmc *mmc) dwmci_writel(host, DWMCI_IDINTEN, 0); dwmci_writel(host, DWMCI_BMOD, 1); - if (host->fifoth_val) { - dwmci_writel(host, DWMCI_FIFOTH, host->fifoth_val); + if (!host->fifoth_val) { + uint32_t fifo_size; + + fifo_size = dwmci_readl(host, DWMCI_FIFOTH); + fifo_size = ((fifo_size & RX_WMARK_MASK) >> RX_WMARK_SHIFT) + 1; + host->fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_size / 2 - 1) | + TX_WMARK(fifo_size / 2); } + dwmci_writel(host, DWMCI_FIFOTH, host->fifoth_val); dwmci_writel(host, DWMCI_CLKENA, 0); dwmci_writel(host, DWMCI_CLKSRC, 0); -- cgit v1.2.1