The patch titled
omap_hsmmc: set a large data timeout for commands with busy signal
has been removed from the -mm tree. Its filename was
omap_hsmmc-set-a-large-data-timeout-for-commands-with-busy-signal.patch
This patch was dropped because an updated version will be merged
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: omap_hsmmc: set a large data timeout for commands with busy signal
From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Commands like SWITCH (CMD6) send a response and then signal busy while the
operation is completed. These commands are expected to always succeed
(otherwise the response would have indicated an error).
Set an arbitrarily large data timeout value (100ms) for these commands to
ensure that premature timeouts do not occur.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Matt Fleming <matt@xxxxxxxxxxxxxxxxx>
Cc: Ian Molton <ian@xxxxxxxxxxxxxx>
Cc: "Roberto A. Foglietta" <roberto.foglietta@xxxxxxxxx>
Cc: Jarkko Lavinen <jarkko.lavinen@xxxxxxxxx>
Cc: Denis Karpov <ext-denis.2.karpov@xxxxxxxxx>
Cc: Pierre Ossman <pierre@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)
diff -puN drivers/mmc/host/omap_hsmmc.c~omap_hsmmc-set-a-large-data-timeout-for-commands-with-busy-signal drivers/mmc/host/omap_hsmmc.c
--- a/drivers/mmc/host/omap_hsmmc.c~omap_hsmmc-set-a-large-data-timeout-for-commands-with-busy-signal
+++ a/drivers/mmc/host/omap_hsmmc.c
@@ -989,7 +989,8 @@ static int omap_hsmmc_start_dma_transfer
}
static void set_data_timeout(struct omap_hsmmc_host *host,
- struct mmc_request *req)
+ unsigned int timeout_ns,
+ unsigned int timeout_clks)
{
unsigned int timeout, cycle_ns;
uint32_t reg, clkd, dto = 0;
@@ -1000,8 +1001,8 @@ static void set_data_timeout(struct omap
clkd = 1;
cycle_ns = 1000000000 / (clk_get_rate(host->fclk) / clkd);
- timeout = req->data->timeout_ns / cycle_ns;
- timeout += req->data->timeout_clks;
+ timeout = timeout_ns / cycle_ns;
+ timeout += timeout_clks;
if (timeout) {
while ((timeout & 0x80000000) == 0) {
dto += 1;
@@ -1035,12 +1036,18 @@ omap_hsmmc_prepare_data(struct omap_hsmm
if (req->data == NULL) {
OMAP_HSMMC_WRITE(host->base, BLK, 0);
+ /*
+ * Set an arbitrary 100ms data timeout for commands with
+ * busy signal.
+ */
+ if (req->cmd->flags & MMC_RSP_BUSY)
+ set_data_timeout(host, 100000000U, 0);
return 0;
}
OMAP_HSMMC_WRITE(host->base, BLK, (req->data->blksz)
| (req->data->blocks << 16));
- set_data_timeout(host, req);
+ set_data_timeout(host, req->data->timeout_ns, req->data->timeout_clks);
if (host->use_dma) {
ret = omap_hsmmc_start_dma_transfer(host, req);
_
Patches currently in -mm which might be from adrian.hunter@xxxxxxxxx are
linux-next.patch
mmc-register-mmci-omap-hs-using-platform_driver_probe.patch
omap_hsmmc-set-a-large-data-timeout-for-commands-with-busy-signal.patch
arm-omap-rx51-set-mmc-capabilities-and-power-saving-flag.patch
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