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mmc: sdhci-of-arasan: Add CQHCI support for arasan,sdhci-5.1

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Add CQHCI initialization and implement CQHCI operations for Arasan
SDHCI variant host, namely arasan,sdhci-5.1, which is used by Rockchip
RK3399 platform.

Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Shawn Lin 2018-01-16 11:43:51 +08:00 committed by Ulf Hansson
parent 7ad43a1498
commit 84362d79f4
2 changed files with 132 additions and 6 deletions
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1
drivers/mmc/host/Kconfig
View File

@ -133,6 +133,7 @@ config MMC_SDHCI_OF_ARASAN
depends on MMC_SDHCI_PLTFM
depends on OF
depends on COMMON_CLK
select MMC_CQHCI
help
This selects the Arasan Secure Digital Host Controller Interface
(SDHCI). This hardware is found e.g. in Xilinx' Zynq SoC.

137
drivers/mmc/host/sdhci-of-arasan.c
View File

@ -25,11 +25,13 @@
#include <linux/of_device.h>
#include <linux/phy/phy.h>
#include <linux/regmap.h>
#include "sdhci-pltfm.h"
#include <linux/of.h>
#define SDHCI_ARASAN_VENDOR_REGISTER 0x78
#include "cqhci.h"
#include "sdhci-pltfm.h"
#define SDHCI_ARASAN_VENDOR_REGISTER 0x78
#define SDHCI_ARASAN_CQE_BASE_ADDR 0x200
#define VENDOR_ENHANCED_STROBE BIT(0)
#define PHY_CLK_TOO_SLOW_HZ 400000
@ -90,6 +92,7 @@ struct sdhci_arasan_data {
struct phy *phy;
bool is_phy_on;
bool has_cqe;
struct clk_hw sdcardclk_hw;
struct clk *sdcardclk;
@ -290,6 +293,62 @@ static const struct sdhci_pltfm_data sdhci_arasan_pdata = {
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
};
static u32 sdhci_arasan_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_arasan_dumpregs(struct mmc_host *mmc)
{
sdhci_dumpregs(mmc_priv(mmc));
}
static void sdhci_arasan_cqe_enable(struct mmc_host *mmc)
{
struct sdhci_host *host = mmc_priv(mmc);
u32 reg;
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 sdhci_arasan_cqhci_ops = {
.enable = sdhci_arasan_cqe_enable,
.disable = sdhci_cqe_disable,
.dumpregs = sdhci_arasan_dumpregs,
};
static const struct sdhci_ops sdhci_arasan_cqe_ops = {
.set_clock = sdhci_arasan_set_clock,
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_arasan_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
.set_power = sdhci_arasan_set_power,
.irq = sdhci_arasan_cqhci_irq,
};
static const struct sdhci_pltfm_data sdhci_arasan_cqe_pdata = {
.ops = &sdhci_arasan_cqe_ops,
.quirks = SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN |
SDHCI_QUIRK2_CLOCK_DIV_ZERO_BROKEN,
};
#ifdef CONFIG_PM_SLEEP
/**
* sdhci_arasan_suspend - Suspend method for the driver
@ -309,6 +368,12 @@ static int sdhci_arasan_suspend(struct device *dev)
if (host->tuning_mode != SDHCI_TUNING_MODE_3)
mmc_retune_needed(host->mmc);
if (sdhci_arasan->has_cqe) {
ret = cqhci_suspend(host->mmc);
if (ret)
return ret;
}
ret = sdhci_suspend_host(host);
if (ret)
return ret;
@ -365,7 +430,16 @@ static int sdhci_arasan_resume(struct device *dev)
sdhci_arasan->is_phy_on = true;
}
return sdhci_resume_host(host);
ret = sdhci_resume_host(host);
if (ret) {
dev_err(dev, "Cannot resume host.\n");
return ret;
}
if (sdhci_arasan->has_cqe)
return cqhci_resume(host->mmc);
return 0;
}
#endif /* ! CONFIG_PM_SLEEP */
@ -568,6 +642,49 @@ static void sdhci_arasan_unregister_sdclk(struct device *dev)
of_clk_del_provider(dev->of_node);
}
static int sdhci_arasan_add_host(struct sdhci_arasan_data *sdhci_arasan)
{
struct sdhci_host *host = sdhci_arasan->host;
struct cqhci_host *cq_host;
bool dma64;
int ret;
if (!sdhci_arasan->has_cqe)
return sdhci_add_host(host);
ret = sdhci_setup_host(host);
if (ret)
return ret;
cq_host = devm_kzalloc(host->mmc->parent,
sizeof(*cq_host), GFP_KERNEL);
if (!cq_host) {
ret = -ENOMEM;
goto cleanup;
}
cq_host->mmio = host->ioaddr + SDHCI_ARASAN_CQE_BASE_ADDR;
cq_host->ops = &sdhci_arasan_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;
}
static int sdhci_arasan_probe(struct platform_device *pdev)
{
int ret;
@ -578,9 +695,15 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_arasan_data *sdhci_arasan;
struct device_node *np = pdev->dev.of_node;
const struct sdhci_pltfm_data *pdata;
if (of_device_is_compatible(pdev->dev.of_node, "arasan,sdhci-5.1"))
pdata = &sdhci_arasan_cqe_pdata;
else
pdata = &sdhci_arasan_pdata;
host = sdhci_pltfm_init(pdev, pdata, sizeof(*sdhci_arasan));
host = sdhci_pltfm_init(pdev, &sdhci_arasan_pdata,
sizeof(*sdhci_arasan));
if (IS_ERR(host))
return PTR_ERR(host);
@ -675,9 +798,11 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
sdhci_arasan_hs400_enhanced_strobe;
host->mmc_host_ops.start_signal_voltage_switch =
sdhci_arasan_voltage_switch;
sdhci_arasan->has_cqe = true;
host->mmc->caps2 |= MMC_CAP2_CQE | MMC_CAP2_CQE_DCMD;
}
ret = sdhci_add_host(host);
ret = sdhci_arasan_add_host(sdhci_arasan);
if (ret)
goto err_add_host;