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dba7ee419d
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>
146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2015, Google, Inc
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* Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
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*/
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#include <common.h>
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#include <dm.h>
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#include <errno.h>
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#include <log.h>
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#include <malloc.h>
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#include <mapmem.h>
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#include <sdhci.h>
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#include <acpi/acpigen.h>
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#include <acpi/acpi_device.h>
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#include <acpi/acpi_dp.h>
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#include <asm-generic/gpio.h>
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#include <dm/acpi.h>
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struct pci_mmc_plat {
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struct mmc_config cfg;
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struct mmc mmc;
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};
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struct pci_mmc_priv {
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struct sdhci_host host;
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void *base;
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struct gpio_desc cd_gpio;
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};
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static int pci_mmc_probe(struct udevice *dev)
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{
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struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
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struct pci_mmc_plat *plat = dev_get_platdata(dev);
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struct pci_mmc_priv *priv = dev_get_priv(dev);
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struct sdhci_host *host = &priv->host;
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int ret;
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host->ioaddr = (void *)dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0,
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PCI_REGION_MEM);
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host->name = dev->name;
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host->mmc = &plat->mmc;
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host->mmc->dev = dev;
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ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
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if (ret)
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return ret;
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host->mmc->priv = &priv->host;
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upriv->mmc = host->mmc;
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return sdhci_probe(dev);
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}
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static int pci_mmc_ofdata_to_platdata(struct udevice *dev)
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{
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struct pci_mmc_priv *priv = dev_get_priv(dev);
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gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
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return 0;
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}
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static int pci_mmc_bind(struct udevice *dev)
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{
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struct pci_mmc_plat *plat = dev_get_platdata(dev);
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return sdhci_bind(dev, &plat->mmc, &plat->cfg);
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}
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static int pci_mmc_acpi_fill_ssdt(const struct udevice *dev,
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struct acpi_ctx *ctx)
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{
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struct pci_mmc_priv *priv = dev_get_priv(dev);
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char path[ACPI_PATH_MAX];
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struct acpi_gpio gpio;
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struct acpi_dp *dp;
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int ret;
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if (!dev_of_valid(dev))
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return 0;
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ret = gpio_get_acpi(&priv->cd_gpio, &gpio);
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if (ret)
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return log_msg_ret("gpio", ret);
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gpio.type = ACPI_GPIO_TYPE_INTERRUPT;
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gpio.pull = ACPI_GPIO_PULL_NONE;
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gpio.irq.mode = ACPI_IRQ_EDGE_TRIGGERED;
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gpio.irq.polarity = ACPI_IRQ_ACTIVE_BOTH;
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gpio.irq.shared = ACPI_IRQ_SHARED;
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gpio.irq.wake = ACPI_IRQ_WAKE;
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gpio.interrupt_debounce_timeout = 10000; /* 100ms */
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/* Use device path as the Scope for the SSDT */
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ret = acpi_device_path(dev, path, sizeof(path));
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if (ret)
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return log_msg_ret("path", ret);
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acpigen_write_scope(ctx, path);
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acpigen_write_name(ctx, "_CRS");
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/* Write GpioInt() as default (if set) or custom from devicetree */
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acpigen_write_resourcetemplate_header(ctx);
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acpi_device_write_gpio(ctx, &gpio);
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acpigen_write_resourcetemplate_footer(ctx);
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/* Bind the cd-gpio name to the GpioInt() resource */
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dp = acpi_dp_new_table("_DSD");
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if (!dp)
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return -ENOMEM;
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acpi_dp_add_gpio(dp, "cd-gpio", path, 0, 0, 1);
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ret = acpi_dp_write(ctx, dp);
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if (ret)
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return log_msg_ret("cd", ret);
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acpigen_pop_len(ctx);
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return 0;
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}
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struct acpi_ops pci_mmc_acpi_ops = {
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.fill_ssdt = pci_mmc_acpi_fill_ssdt,
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};
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static const struct udevice_id pci_mmc_match[] = {
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{ .compatible = "intel,apl-sd" },
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{ }
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};
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U_BOOT_DRIVER(pci_mmc) = {
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.name = "pci_mmc",
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.id = UCLASS_MMC,
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.of_match = pci_mmc_match,
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.bind = pci_mmc_bind,
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.ofdata_to_platdata = pci_mmc_ofdata_to_platdata,
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.probe = pci_mmc_probe,
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.ops = &sdhci_ops,
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.priv_auto_alloc_size = sizeof(struct pci_mmc_priv),
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.platdata_auto_alloc_size = sizeof(struct pci_mmc_plat),
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ACPI_OPS_PTR(&pci_mmc_acpi_ops)
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};
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static struct pci_device_id mmc_supported[] = {
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{ PCI_DEVICE_CLASS(PCI_CLASS_SYSTEM_SDHCI << 8, 0xffff00) },
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{},
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};
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U_BOOT_PCI_DEVICE(pci_mmc, mmc_supported);
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