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mmc: sdhci_am654: Add Support for Command Queuing Engine to J721E

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Add Support for CQHCI (Command Queuing Host Controller Interface)
for each of the host controllers present in TI's J721E devices.
Add cqhci_ops and a .irq() callback to handle cqhci specific interrupts.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Faiz Abbas 2019-11-18 13:06:09 +05:30 committed by Ulf Hansson
parent f3d7c2292d
commit f545702b74
2 changed files with 71 additions and 1 deletions
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1
drivers/mmc/host/Kconfig
View File

@ -1022,6 +1022,7 @@ config MMC_SDHCI_AM654
tristate "Support for the SDHCI Controller in TI's AM654 SOCs"
depends on MMC_SDHCI_PLTFM && OF && REGMAP_MMIO
select MMC_SDHCI_IO_ACCESSORS
select MMC_CQHCI
help
This selects the Secure Digital Host Controller Interface (SDHCI)
support present in TI's AM654 SOCs. The controller supports

71
drivers/mmc/host/sdhci_am654.c
View File

@ -12,6 +12,7 @@
#include <linux/property.h>
#include <linux/regmap.h>
#include "cqhci.h"
#include "sdhci-pltfm.h"
/* CTL_CFG Registers */
@ -68,6 +69,9 @@
#define CLOCK_TOO_SLOW_HZ 400000
/* Command Queue Host Controller Interface Base address */
#define SDHCI_AM654_CQE_BASE_ADDR 0x200
static struct regmap_config sdhci_am654_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
@ -259,6 +263,19 @@ static const struct sdhci_am654_driver_data sdhci_am654_drvdata = {
.flags = IOMUX_PRESENT | FREQSEL_2_BIT | STRBSEL_4_BIT | DLL_PRESENT,
};
static u32 sdhci_am654_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 struct sdhci_ops sdhci_j721e_8bit_ops = {
.get_max_clock = sdhci_pltfm_clk_get_max_clock,
.get_timeout_clock = sdhci_pltfm_clk_get_max_clock,
@ -267,6 +284,7 @@ static struct sdhci_ops sdhci_j721e_8bit_ops = {
.set_power = sdhci_am654_set_power,
.set_clock = sdhci_am654_set_clock,
.write_b = sdhci_am654_write_b,
.irq = sdhci_am654_cqhci_irq,
.reset = sdhci_reset,
};
@ -290,6 +308,7 @@ static struct sdhci_ops sdhci_j721e_4bit_ops = {
.set_power = sdhci_am654_set_power,
.set_clock = sdhci_j721e_4bit_set_clock,
.write_b = sdhci_am654_write_b,
.irq = sdhci_am654_cqhci_irq,
.reset = sdhci_reset,
};
@ -304,6 +323,40 @@ static const struct sdhci_am654_driver_data sdhci_j721e_4bit_drvdata = {
.pdata = &sdhci_j721e_4bit_pdata,
.flags = IOMUX_PRESENT,
};
static void sdhci_am654_dumpregs(struct mmc_host *mmc)
{
sdhci_dumpregs(mmc_priv(mmc));
}
static const struct cqhci_host_ops sdhci_am654_cqhci_ops = {
.enable = sdhci_cqe_enable,
.disable = sdhci_cqe_disable,
.dumpregs = sdhci_am654_dumpregs,
};
static int sdhci_am654_cqe_add_host(struct sdhci_host *host)
{
struct cqhci_host *cq_host;
int ret;
cq_host = devm_kzalloc(host->mmc->parent, sizeof(struct cqhci_host),
GFP_KERNEL);
if (!cq_host)
return -ENOMEM;
cq_host->mmio = host->ioaddr + SDHCI_AM654_CQE_BASE_ADDR;
cq_host->quirks |= CQHCI_QUIRK_SHORT_TXFR_DESC_SZ;
cq_host->caps |= CQHCI_TASK_DESC_SZ_128;
cq_host->ops = &sdhci_am654_cqhci_ops;
host->mmc->caps2 |= MMC_CAP2_CQE;
ret = cqhci_init(cq_host, host->mmc, 1);
return ret;
}
static int sdhci_am654_init(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@ -344,7 +397,23 @@ static int sdhci_am654_init(struct sdhci_host *host)
regmap_update_bits(sdhci_am654->base, CTL_CFG_2, SLOTTYPE_MASK,
ctl_cfg_2);
return sdhci_add_host(host);
ret = sdhci_setup_host(host);
if (ret)
return ret;
ret = sdhci_am654_cqe_add_host(host);
if (ret)
goto err_cleanup_host;
ret = __sdhci_add_host(host);
if (ret)
goto err_cleanup_host;
return 0;
err_cleanup_host:
sdhci_cleanup_host(host);
return ret;
}
static int sdhci_am654_get_of_property(struct platform_device *pdev,