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mmc: sdhci-pci: Fix BYT OCP setting

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Some time ago, a fix was done for the sdhci-acpi driver, refer
commit 6e1c7d6103 ("mmc: sdhci-acpi: Reduce Baytrail eMMC/SD/SDIO
hangs"). The same issue was not expected to affect the sdhci-pci driver,
but there have been reports to the contrary, so make the same hardware
setting change.

This patch applies to v5.0+ but before that backports will be required.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2019-05-06 11:38:53 +03:00 committed by Ulf Hansson
parent 3436821738
commit 0a49a619e7
2 changed files with 97 additions and 0 deletions
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1
drivers/mmc/host/Kconfig
View File

@ -92,6 +92,7 @@ config MMC_SDHCI_PCI
tristate "SDHCI support on PCI bus"
depends on MMC_SDHCI && PCI
select MMC_CQHCI
select IOSF_MBI if X86
help
This selects the PCI Secure Digital Host Controller Interface.
Most controllers found today are PCI devices.

96
drivers/mmc/host/sdhci-pci-core.c
View File

@ -31,6 +31,10 @@
#include <linux/mmc/sdhci-pci-data.h>
#include <linux/acpi.h>
#ifdef CONFIG_X86
#include <asm/iosf_mbi.h>
#endif
#include "cqhci.h"
#include "sdhci.h"
@ -451,6 +455,50 @@ static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
.probe_slot = pch_hc_probe_slot,
};
#ifdef CONFIG_X86
#define BYT_IOSF_SCCEP 0x63
#define BYT_IOSF_OCP_NETCTRL0 0x1078
#define BYT_IOSF_OCP_TIMEOUT_BASE GENMASK(10, 8)
static void byt_ocp_setting(struct pci_dev *pdev)
{
u32 val = 0;
if (pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC &&
pdev->device != PCI_DEVICE_ID_INTEL_BYT_SDIO &&
pdev->device != PCI_DEVICE_ID_INTEL_BYT_SD &&
pdev->device != PCI_DEVICE_ID_INTEL_BYT_EMMC2)
return;
if (iosf_mbi_read(BYT_IOSF_SCCEP, MBI_CR_READ, BYT_IOSF_OCP_NETCTRL0,
&val)) {
dev_err(&pdev->dev, "%s read error\n", __func__);
return;
}
if (!(val & BYT_IOSF_OCP_TIMEOUT_BASE))
return;
val &= ~BYT_IOSF_OCP_TIMEOUT_BASE;
if (iosf_mbi_write(BYT_IOSF_SCCEP, MBI_CR_WRITE, BYT_IOSF_OCP_NETCTRL0,
val)) {
dev_err(&pdev->dev, "%s write error\n", __func__);
return;
}
dev_dbg(&pdev->dev, "%s completed\n", __func__);
}
#else
static inline void byt_ocp_setting(struct pci_dev *pdev)
{
}
#endif
enum {
INTEL_DSM_FNS = 0,
INTEL_DSM_V18_SWITCH = 3,
@ -715,6 +763,8 @@ static void byt_probe_slot(struct sdhci_pci_slot *slot)
byt_read_dsm(slot);
byt_ocp_setting(slot->chip->pdev);
ops->execute_tuning = intel_execute_tuning;
ops->start_signal_voltage_switch = intel_start_signal_voltage_switch;
@ -938,7 +988,35 @@ static int byt_sd_probe_slot(struct sdhci_pci_slot *slot)
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int byt_resume(struct sdhci_pci_chip *chip)
{
byt_ocp_setting(chip->pdev);
return sdhci_pci_resume_host(chip);
}
#endif
#ifdef CONFIG_PM
static int byt_runtime_resume(struct sdhci_pci_chip *chip)
{
byt_ocp_setting(chip->pdev);
return sdhci_pci_runtime_resume_host(chip);
}
#endif
static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
#ifdef CONFIG_PM_SLEEP
.resume = byt_resume,
#endif
#ifdef CONFIG_PM
.runtime_resume = byt_runtime_resume,
#endif
.allow_runtime_pm = true,
.probe_slot = byt_emmc_probe_slot,
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
@ -972,6 +1050,12 @@ static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
};
static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
#ifdef CONFIG_PM_SLEEP
.resume = byt_resume,
#endif
#ifdef CONFIG_PM
.runtime_resume = byt_runtime_resume,
#endif
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
@ -983,6 +1067,12 @@ static const struct sdhci_pci_fixes sdhci_ni_byt_sdio = {
};
static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
#ifdef CONFIG_PM_SLEEP
.resume = byt_resume,
#endif
#ifdef CONFIG_PM
.runtime_resume = byt_runtime_resume,
#endif
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED,
.quirks2 = SDHCI_QUIRK2_HOST_OFF_CARD_ON |
@ -994,6 +1084,12 @@ static const struct sdhci_pci_fixes sdhci_intel_byt_sdio = {
};
static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
#ifdef CONFIG_PM_SLEEP
.resume = byt_resume,
#endif
#ifdef CONFIG_PM
.runtime_resume = byt_runtime_resume,
#endif
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC |
SDHCI_QUIRK_NO_LED,
.quirks2 = SDHCI_QUIRK2_CARD_ON_NEEDS_BUS_ON |