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mmc: sdhci-pci: Add CQHCI support for Intel GLK

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Add CQHCI initialization and implement CQHCI operations for Intel GLK.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Adrian Hunter 2017-11-29 15:41:06 +02:00 committed by Ulf Hansson
parent a4080225f5
commit 8ee82bda23
2 changed files with 155 additions and 1 deletions
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1
drivers/mmc/host/Kconfig
View File

@ -81,6 +81,7 @@ config MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER
config MMC_SDHCI_PCI
tristate "SDHCI support on PCI bus"
depends on MMC_SDHCI && PCI
select MMC_CQHCI
help
This selects the PCI Secure Digital Host Controller Interface.
Most controllers found today are PCI devices.

155
drivers/mmc/host/sdhci-pci-core.c
View File

@ -30,6 +30,8 @@
#include <linux/mmc/sdhci-pci-data.h>
#include <linux/acpi.h>
#include "cqhci.h"
#include "sdhci.h"
#include "sdhci-pci.h"
@ -116,6 +118,28 @@ int sdhci_pci_resume_host(struct sdhci_pci_chip *chip)
return 0;
}
static int sdhci_cqhci_suspend(struct sdhci_pci_chip *chip)
{
int ret;
ret = cqhci_suspend(chip->slots[0]->host->mmc);
if (ret)
return ret;
return sdhci_pci_suspend_host(chip);
}
static int sdhci_cqhci_resume(struct sdhci_pci_chip *chip)
{
int ret;
ret = sdhci_pci_resume_host(chip);
if (ret)
return ret;
return cqhci_resume(chip->slots[0]->host->mmc);
}
#endif
#ifdef CONFIG_PM
@ -166,8 +190,48 @@ static int sdhci_pci_runtime_resume_host(struct sdhci_pci_chip *chip)
return 0;
}
static int sdhci_cqhci_runtime_suspend(struct sdhci_pci_chip *chip)
{
int ret;
ret = cqhci_suspend(chip->slots[0]->host->mmc);
if (ret)
return ret;
return sdhci_pci_runtime_suspend_host(chip);
}
static int sdhci_cqhci_runtime_resume(struct sdhci_pci_chip *chip)
{
int ret;
ret = sdhci_pci_runtime_resume_host(chip);
if (ret)
return ret;
return cqhci_resume(chip->slots[0]->host->mmc);
}
#endif
static u32 sdhci_cqhci_irq(struct sdhci_host *host, u32 intmask)
{
int cmd_error = 0;
int data_error = 0;
if (!sdhci_cqe_irq(host, intmask, &cmd_error, &data_error))
return intmask;
cqhci_irq(host->mmc, intmask, cmd_error, data_error);
return 0;
}
static void sdhci_pci_dumpregs(struct mmc_host *mmc)
{
sdhci_dumpregs(mmc_priv(mmc));
}
/*****************************************************************************\
* *
* Hardware specific quirk handling *
@ -583,6 +647,18 @@ static const struct sdhci_ops sdhci_intel_byt_ops = {
.voltage_switch = sdhci_intel_voltage_switch,
};
static const struct sdhci_ops sdhci_intel_glk_ops = {
.set_clock = sdhci_set_clock,
.set_power = sdhci_intel_set_power,
.enable_dma = sdhci_pci_enable_dma,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.hw_reset = sdhci_pci_hw_reset,
.voltage_switch = sdhci_intel_voltage_switch,
.irq = sdhci_cqhci_irq,
};
static void byt_read_dsm(struct sdhci_pci_slot *slot)
{
struct intel_host *intel_host = sdhci_pci_priv(slot);
@ -612,15 +688,83 @@ static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)
{
int ret = byt_emmc_probe_slot(slot);
slot->host->mmc->caps2 |= MMC_CAP2_CQE;
if (slot->chip->pdev->device != PCI_DEVICE_ID_INTEL_GLK_EMMC) {
slot->host->mmc->caps2 |= MMC_CAP2_HS400_ES,
slot->host->mmc_host_ops.hs400_enhanced_strobe =
intel_hs400_enhanced_strobe;
slot->host->mmc->caps2 |= MMC_CAP2_CQE_DCMD;
}
return ret;
}
static void glk_cqe_enable(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
u32 reg;
/*
* CQE gets stuck if it sees Buffer Read Enable bit set, which can be
* the case after tuning, so ensure the buffer is drained.
*/
reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
while (reg & SDHCI_DATA_AVAILABLE) {
sdhci_readl(host, SDHCI_BUFFER);
reg = sdhci_readl(host, SDHCI_PRESENT_STATE);
}
sdhci_cqe_enable(mmc);
}
static const struct cqhci_host_ops glk_cqhci_ops = {
.enable = glk_cqe_enable,
.disable = sdhci_cqe_disable,
.dumpregs = sdhci_pci_dumpregs,
};
static int glk_emmc_add_host(struct sdhci_pci_slot *slot)
{
struct device *dev = &slot->chip->pdev->dev;
struct sdhci_host *host = slot->host;
struct cqhci_host *cq_host;
bool dma64;
int ret;
ret = sdhci_setup_host(host);
if (ret)
return ret;
cq_host = devm_kzalloc(dev, sizeof(*cq_host), GFP_KERNEL);
if (!cq_host) {
ret = -ENOMEM;
goto cleanup;
}
cq_host->mmio = host->ioaddr + 0x200;
cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
cq_host->ops = &glk_cqhci_ops;
dma64 = host->flags & SDHCI_USE_64_BIT_DMA;
if (dma64)
cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
ret = cqhci_init(cq_host, host->mmc, dma64);
if (ret)
goto cleanup;
ret = __sdhci_add_host(host);
if (ret)
goto cleanup;
return 0;
cleanup:
sdhci_cleanup_host(host);
return ret;
}
#ifdef CONFIG_ACPI
static int ni_set_max_freq(struct sdhci_pci_slot *slot)
{
@ -699,11 +843,20 @@ static const struct sdhci_pci_fixes sdhci_intel_byt_emmc = {
static const struct sdhci_pci_fixes sdhci_intel_glk_emmc = {
.allow_runtime_pm = true,
.probe_slot = glk_emmc_probe_slot,
.add_host = glk_emmc_add_host,
#ifdef CONFIG_PM_SLEEP
.suspend = sdhci_cqhci_suspend,
.resume = sdhci_cqhci_resume,
#endif
#ifdef CONFIG_PM
.runtime_suspend = sdhci_cqhci_runtime_suspend,
.runtime_resume = sdhci_cqhci_runtime_resume,
#endif
.quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 |
SDHCI_QUIRK2_STOP_WITH_TC,
.ops = &sdhci_intel_byt_ops,
.ops = &sdhci_intel_glk_ops,
.priv_size = sizeof(struct intel_host),
};