diff options
| author | Aisheng Dong | 2014-08-27 09:26:29 +0200 |
|---|---|---|
| committer | Ulf Hansson | 2014-09-09 13:59:21 +0200 |
| commit | b45e668af4439bfc52ed92af44b6400661ba7ec8 (patch) | |
| tree | c84dd728d94f8ae0bef7f1f3997c04c5b8e905ce /drivers/mmc | |
| parent | mmc: sdhci-esdhc-imx: fix incorrect max timeout cout for uSDHC (diff) | |
| download | kernel-qcow2-linux-b45e668af4439bfc52ed92af44b6400661ba7ec8.tar.gz kernel-qcow2-linux-b45e668af4439bfc52ed92af44b6400661ba7ec8.tar.xz kernel-qcow2-linux-b45e668af4439bfc52ed92af44b6400661ba7ec8.zip | |
mmc: sdhci: add platform set_timeout hook
Currently the common code assume 0xE is the maximum timeout counter
value and use it to write into the timeout counter register.
However, it's fairly possible that some other SoCs may have different
max timeout register value. That means 0xE may be incorrect and
becomes meaningless.
It's also possible that other platforms has different timeout
calculation algorithm. To be flexible, this patch provides a .set_timeout
hook for those platforms to set the timeout on their way if they need.
Reviewed-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Dong Aisheng <b29396@freescale.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 19 | ||||
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 2 |
2 files changed, 16 insertions, 5 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 2ba9c4b8508d..ff0e1c55d958 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -707,19 +707,28 @@ static void sdhci_set_transfer_irqs(struct sdhci_host *host) sdhci_writel(host, host->ier, SDHCI_SIGNAL_ENABLE); } -static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) +static void sdhci_set_timeout(struct sdhci_host *host, struct mmc_command *cmd) { u8 count; + + if (host->ops->set_timeout) { + host->ops->set_timeout(host, cmd); + } else { + count = sdhci_calc_timeout(host, cmd); + sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); + } +} + +static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_command *cmd) +{ u8 ctrl; struct mmc_data *data = cmd->data; int ret; WARN_ON(host->data); - if (data || (cmd->flags & MMC_RSP_BUSY)) { - count = sdhci_calc_timeout(host, cmd); - sdhci_writeb(host, count, SDHCI_TIMEOUT_CONTROL); - } + if (data || (cmd->flags & MMC_RSP_BUSY)) + sdhci_set_timeout(host, cmd); if (!data) return; diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index b13050968946..9828ff83d84c 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -282,6 +282,8 @@ struct sdhci_ops { unsigned int (*get_min_clock)(struct sdhci_host *host); unsigned int (*get_timeout_clock)(struct sdhci_host *host); unsigned int (*get_max_timeout_count)(struct sdhci_host *host); + void (*set_timeout)(struct sdhci_host *host, + struct mmc_command *cmd); void (*set_bus_width)(struct sdhci_host *host, int width); void (*platform_send_init_74_clocks)(struct sdhci_host *host, u8 power_mode); |