Title: [7940] trunk/drivers/mmc/host/bfin_sdh.c: bug[#5729]set the actual timeout clocks according to csd
- Revision
- 7940
- Author
- cliff
- Date
- 2009-12-07 04:09:55 -0500 (Mon, 07 Dec 2009)
Log Message
bug[#5729]set the actual timeout clocks according to csd
Modified Paths
Diff
Modified: trunk/drivers/mmc/host/bfin_sdh.c (7939 => 7940)
--- trunk/drivers/mmc/host/bfin_sdh.c 2009-12-07 08:07:01 UTC (rev 7939)
+++ trunk/drivers/mmc/host/bfin_sdh.c 2009-12-07 09:09:55 UTC (rev 7940)
@@ -115,6 +115,7 @@
unsigned int length;
unsigned int data_ctl;
unsigned int dma_cfg;
+ unsigned int cycle_ns, timeout;
dev_dbg(mmc_dev(host->mmc), "%s enter flags: 0x%x\n", __func__, data->flags);
host->data = ""
@@ -135,8 +136,11 @@
data_ctl |= ((ffs(data->blksz) - 1) << 4);
bfin_write_SDH_DATA_CTL(data_ctl);
-
- bfin_write_SDH_DATA_TIMER(0xFFFF);
+ /* the time of a host clock period in ns */
+ cycle_ns = 1000000000 / (get_sclk() / (2 * (host->clk_div + 1)));
+ timeout = data->timeout_ns / cycle_ns;
+ timeout += data->timeout_clks;
+ bfin_write_SDH_DATA_TIMER(timeout);
SSYNC();
if (data->flags & MMC_DATA_READ) {
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