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authorRussell King2014-04-25 12:59:31 +0100
committerChris Ball2014-05-22 08:33:25 -0400
commitd975f121011a58223c7936ab483c3374a83236c3 (patch)
tree24bc60cfe13146495c16108d40b12f878a805849 /drivers/mmc
parent96d7b78cfc2fd6b1539704e2d33239dbaa097cc4 (diff)
mmc: sdhci: cache timing information locally
Rather than reading back the timing information from the registers, cache it locally. This allows implementations to translate the UHS timing by overriding the set_uhs_signaling() method as required without also having to emulate the SDHCI_HOST_CONTROL2 register. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Markus Pargmann <mpa@pengutronix.de> Tested-by: Stephen Warren <swarren@nvidia.com> [Ulf Hansson] Resolved conflict Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0073aae0adcb..956799c75df2 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1083,24 +1083,23 @@ static void sdhci_finish_command(struct sdhci_host *host)
static u16 sdhci_get_preset_value(struct sdhci_host *host)
{
- u16 ctrl, preset = 0;
+ u16 preset = 0;
- ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
-
- switch (ctrl & SDHCI_CTRL_UHS_MASK) {
- case SDHCI_CTRL_UHS_SDR12:
+ switch (host->timing) {
+ case MMC_TIMING_UHS_SDR12:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR12);
break;
- case SDHCI_CTRL_UHS_SDR25:
+ case MMC_TIMING_UHS_SDR25:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR25);
break;
- case SDHCI_CTRL_UHS_SDR50:
+ case MMC_TIMING_UHS_SDR50:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR50);
break;
- case SDHCI_CTRL_UHS_SDR104:
+ case MMC_TIMING_UHS_SDR104:
+ case MMC_TIMING_MMC_HS200:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_SDR104);
break;
- case SDHCI_CTRL_UHS_DDR50:
+ case MMC_TIMING_UHS_DDR50:
preset = sdhci_readw(host, SDHCI_PRESET_FOR_DDR50);
break;
default:
@@ -1538,6 +1537,7 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
host->ops->set_uhs_signaling(host, ios->timing);
+ host->timing = ios->timing;
if (!(host->quirks2 & SDHCI_QUIRK2_PRESET_VALUE_BROKEN) &&
((ios->timing == MMC_TIMING_UHS_SDR12) ||
@@ -1842,12 +1842,13 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
* If the Host Controller supports the HS200 mode then the
* tuning function has to be executed.
*/
- if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR50) &&
+ if (host->timing == MMC_TIMING_UHS_SDR50 &&
(host->flags & SDHCI_SDR50_NEEDS_TUNING ||
host->flags & SDHCI_SDR104_NEEDS_TUNING))
requires_tuning_nonuhs = true;
- if (((ctrl & SDHCI_CTRL_UHS_MASK) == SDHCI_CTRL_UHS_SDR104) ||
+ if (host->timing == MMC_TIMING_MMC_HS200 ||
+ host->timing == MMC_TIMING_UHS_SDR104 ||
requires_tuning_nonuhs)
ctrl |= SDHCI_CTRL_EXEC_TUNING;
else {