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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>
This commit is contained in:
Simon Glass 2015-08-06 20:16:29 -06:00 committed by Pantelis Antoniou
parent 1c87ffe8d1
commit 760177dff4
1 changed files with 8 additions and 2 deletions
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10
drivers/mmc/dw_mmc.c
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@ -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);