diff options
Diffstat (limited to 'drivers/mmc/pci_mmc.c')
| -rw-r--r-- | drivers/mmc/pci_mmc.c | 78 |
1 files changed, 77 insertions, 1 deletions
diff --git a/drivers/mmc/pci_mmc.c b/drivers/mmc/pci_mmc.c index 404264a697..0c45e1b893 100644 --- a/drivers/mmc/pci_mmc.c +++ b/drivers/mmc/pci_mmc.c @@ -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[] = { |