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acpi: mmc: Generate ACPI info for the PCI SD Card 

Write required information into the SSDT to describe the SD card
card-detect pin. Since the required GPIO properties are not present in
the device-tree binding, set them manually for now.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-07-07 21:32:12 -06:00 committed by Bin Meng
parent d7d631df2d
commit dba7ee419d
2 changed files with 79 additions and 1 deletions
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2
configs/sandbox_defconfig
View File

@ -149,7 +149,9 @@ CONFIG_P2SB=y
CONFIG_PWRSEQ=y
CONFIG_SPL_PWRSEQ=y
CONFIG_I2C_EEPROM=y
CONFIG_MMC_PCI=y
CONFIG_MMC_SANDBOX=y
CONFIG_MMC_SDHCI=y
CONFIG_MTD=y
CONFIG_SPI_FLASH_SANDBOX=y
CONFIG_SPI_FLASH_ATMEL=y

78
drivers/mmc/pci_mmc.c
View File

@ -7,10 +7,15 @@
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <malloc.h>
#include <mapmem.h>
#include <sdhci.h>
#include <asm/pci.h>
#include <acpi/acpigen.h>
#include <acpi/acpi_device.h>
#include <acpi/acpi_dp.h>
#include <asm-generic/gpio.h>
#include <dm/acpi.h>
struct pci_mmc_plat {
struct mmc_config cfg;
@ -20,6 +25,7 @@ struct pci_mmc_plat {
struct pci_mmc_priv {
struct sdhci_host host;
void *base;
struct gpio_desc cd_gpio;
};
static int pci_mmc_probe(struct udevice *dev)
@ -44,6 +50,15 @@ static int pci_mmc_probe(struct udevice *dev)
return sdhci_probe(dev);
}
static int pci_mmc_ofdata_to_platdata(struct udevice *dev)
{
struct pci_mmc_priv *priv = dev_get_priv(dev);
gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
return 0;
}
static int pci_mmc_bind(struct udevice *dev)
{
struct pci_mmc_plat *plat = dev_get_platdata(dev);
@ -51,14 +66,75 @@ static int pci_mmc_bind(struct udevice *dev)
return sdhci_bind(dev, &plat->mmc, &plat->cfg);
}
static int pci_mmc_acpi_fill_ssdt(const struct udevice *dev,
struct acpi_ctx *ctx)
{
struct pci_mmc_priv *priv = dev_get_priv(dev);
char path[ACPI_PATH_MAX];
struct acpi_gpio gpio;
struct acpi_dp *dp;
int ret;
if (!dev_of_valid(dev))
return 0;
ret = gpio_get_acpi(&priv->cd_gpio, &gpio);
if (ret)
return log_msg_ret("gpio", ret);
gpio.type = ACPI_GPIO_TYPE_INTERRUPT;
gpio.pull = ACPI_GPIO_PULL_NONE;
gpio.irq.mode = ACPI_IRQ_EDGE_TRIGGERED;
gpio.irq.polarity = ACPI_IRQ_ACTIVE_BOTH;
gpio.irq.shared = ACPI_IRQ_SHARED;
gpio.irq.wake = ACPI_IRQ_WAKE;
gpio.interrupt_debounce_timeout = 10000; /* 100ms */
/* Use device path as the Scope for the SSDT */
ret = acpi_device_path(dev, path, sizeof(path));
if (ret)
return log_msg_ret("path", ret);
acpigen_write_scope(ctx, path);
acpigen_write_name(ctx, "_CRS");
/* Write GpioInt() as default (if set) or custom from devicetree */
acpigen_write_resourcetemplate_header(ctx);
acpi_device_write_gpio(ctx, &gpio);
acpigen_write_resourcetemplate_footer(ctx);
/* Bind the cd-gpio name to the GpioInt() resource */
dp = acpi_dp_new_table("_DSD");
if (!dp)
return -ENOMEM;
acpi_dp_add_gpio(dp, "cd-gpio", path, 0, 0, 1);
ret = acpi_dp_write(ctx, dp);
if (ret)
return log_msg_ret("cd", ret);
acpigen_pop_len(ctx);
return 0;
}
struct acpi_ops pci_mmc_acpi_ops = {
.fill_ssdt = pci_mmc_acpi_fill_ssdt,
};
static const struct udevice_id pci_mmc_match[] = {
{ .compatible = "intel,apl-sd" },
{ }
};
U_BOOT_DRIVER(pci_mmc) = {
.name = "pci_mmc",
.id = UCLASS_MMC,
.of_match = pci_mmc_match,
.bind = pci_mmc_bind,
.ofdata_to_platdata = pci_mmc_ofdata_to_platdata,
.probe = pci_mmc_probe,
.ops = &sdhci_ops,
.priv_auto_alloc_size = sizeof(struct pci_mmc_priv),
.platdata_auto_alloc_size = sizeof(struct pci_mmc_plat),
ACPI_OPS_PTR(&pci_mmc_acpi_ops)
};
static struct pci_device_id mmc_supported[] = {