From 760177dff4662d000c7b1331ec93b2ea4fbd564e Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 6 Aug 2015 20:16:29 -0600
Subject: [PATCH] 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 <sjg@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
---
drivers/mmc/dw_mmc.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
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);
--
2.39.5