Thread (30 messages) 30 messages, 3 authors, 2013-12-17
STALE4585d

[PATCH 4/6] mmc: sdhci-esdhc-imx: set the correct max timeout value for uSDHC

From: Dong Aisheng <hidden>
Date: 2013-12-11 03:08:46
Also in: linux-mmc

On Wed, Dec 11, 2013 at 10:17 AM, Shawn Guo [off-list ref] wrote:
On Tue, Dec 10, 2013 at 08:56:06PM +0800, Dong Aisheng wrote:
quoted
The default sdhci driver write 0xE into timeout counter register to
set the maximum timeout. The value is not correct for uSDHC since the
max counter value for uSDHC is 0xF.
Instead of using common timeout code in sdhci, we implement esdhc_set_timeout
to handle the difference between eSDHC and uSDHC.

Signed-off-by: Dong Aisheng <redacted>
---
 drivers/mmc/host/sdhci-esdhc-imx.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 97b35e1..c24cb23 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -868,6 +868,16 @@ unsigned int esdhc_get_max_timeout(struct sdhci_host *host)
      return max_to / (esdhc_pltfm_get_max_clock(host) / 1000);
 }

+void esdhc_set_timeout(struct sdhci_host *host, struct mmc_command *cmd)
static?
Sorry, i missed it when do copy&paste.
Will update it in v2 with another same issue you pointed.

Regards
Dong Aisheng
Shawn
quoted
+{
+     struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+     struct pltfm_imx_data *imx_data = pltfm_host->priv;
+
+     /* use maximum timeout counter */
+     sdhci_writeb(host, esdhc_is_usdhc(imx_data) ? 0xF : 0xE,
+                     SDHCI_TIMEOUT_CONTROL);
+}
+
 static struct sdhci_ops sdhci_esdhc_ops = {
      .read_l = esdhc_readl_le,
      .read_w = esdhc_readw_le,
@@ -881,6 +891,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
      .platform_bus_width = esdhc_pltfm_bus_width,
      .set_uhs_signaling = esdhc_set_uhs_signaling,
      .get_max_timeout = esdhc_get_max_timeout,
+     .set_timeout = esdhc_set_timeout,
 };

 static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
--
1.7.2.rc3

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