shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-09 04:10:18 +09:00
Code Issues Packages Projects Releases Wiki Activity

mmc: rk_sdmmc: disable controller int before enter deepsleep

Browse Source 
Generally when machine enter deepsleep, with no cirrcumstance,
host can interact with slavery devices. So disbale our int generater
ourself. By occasionly, we find reset controller will trigger an
unexpected SEB int. It exists a race condition for reset and IO timing
before switched to gpio and confuse state machine.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Tested-and-Reviewed-by: Xiao yao <xiaoyao@rock-chips.com>
This commit is contained in:
Shawn Lin
2015-05-22 14:56:11 +08:00
parent 4bb5de4aae
commit 7fe20f9744
1 changed files with 19 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/mmc/host/rk_sdmmc.c
View File

@@ -4226,16 +4226,18 @@ int dw_mci_suspend(struct dw_mci *host)
{
int present = dw_mci_get_cd(host->mmc);
if((host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SDIO) &&
(get_wifi_chip_type() == WIFI_ESP8089 || get_wifi_chip_type() > WIFI_AP6XXX_SERIES))
if((host->mmc->restrict_caps &
RESTRICT_CARD_TYPE_SDIO) &&
(get_wifi_chip_type() == WIFI_ESP8089 ||
get_wifi_chip_type() > WIFI_AP6XXX_SERIES))
return 0;
if(host->vmmc)
regulator_disable(host->vmmc);
if(host->vmmc)
regulator_disable(host->vmmc);
/*only for sdmmc controller*/
if (host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SD) {
disable_irq(host->irq);
/* Only for sdmmc controller */
if (host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SD) {
disable_irq(host->irq);
if (present) {
if (pinctrl_select_state(host->pinctrl, host->pins_idle) < 0)
MMC_DBG_ERR_FUNC(host->mmc,
@@ -4243,10 +4245,6 @@ int dw_mci_suspend(struct dw_mci *host)
mmc_hostname(host->mmc));
}
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, 0x00);
mci_writel(host, CTRL, 0x00);
/* Soc rk3126/3036 already in gpio_cd mode */
if (!soc_is_rk3126() && !soc_is_rk3126b() && !soc_is_rk3036()) {
dw_mci_of_get_cd_gpio(host->dev, 0, host->mmc);
@@ -4254,6 +4252,10 @@ int dw_mci_suspend(struct dw_mci *host)
}
}
mci_writel(host, RINTSTS, 0xFFFFFFFF);
mci_writel(host, INTMASK, 0x00);
mci_writel(host, CTRL, 0x00);
if (host->rst_ops &&
host->rst_ops->pre_suspend)
host->rst_ops->pre_suspend(host);
@@ -4353,12 +4355,15 @@ int dw_mci_resume(struct dw_mci *host)
mci_writel(host, TMOUT, 0xFFFFFFFF);
mci_writel(host, RINTSTS, 0xFFFFFFFF);
regs = SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | SDMMC_INT_TXDR | SDMMC_INT_RXDR | SDMMC_INT_VSI |
DW_MCI_ERROR_FLAGS;
regs = SDMMC_INT_CMD_DONE | SDMMC_INT_DATA_OVER | SDMMC_INT_TXDR |
SDMMC_INT_RXDR | SDMMC_INT_VSI | DW_MCI_ERROR_FLAGS;
if(!(host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SDIO))
regs |= SDMMC_INT_CD;
regs |= SDMMC_INT_CD;
mci_writel(host, INTMASK, regs);
mci_writel(host, CTRL, SDMMC_CTRL_INT_ENABLE);
/*only for sdmmc controller*/
if((host->mmc->restrict_caps & RESTRICT_CARD_TYPE_SD)){
enable_irq(host->irq);