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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Support of SDHCI for Microchip PIC32 SoC.
- *
- * Copyright (C) 2015 Microchip Technology Inc.
- * Andrei Pistirica <andrei.pistirica@microchip.com>
- */
- #include <dm.h>
- #include <sdhci.h>
- #include <clk.h>
- #include <linux/errno.h>
- #include <mach/pic32.h>
- struct pic32_sdhci_plat {
- struct mmc_config cfg;
- struct mmc mmc;
- };
- static int pic32_sdhci_probe(struct udevice *dev)
- {
- struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
- struct pic32_sdhci_plat *plat = dev_get_plat(dev);
- struct sdhci_host *host = dev_get_priv(dev);
- struct clk clk;
- ulong clk_rate;
- int ret;
- ret = clk_get_by_name(dev, "base_clk", &clk);
- if (ret)
- return ret;
- clk_rate = clk_get_rate(&clk);
- clk_free(&clk);
- if (IS_ERR_VALUE(clk_rate))
- return clk_rate;
- host->ioaddr = dev_remap_addr(dev);
- if (!host->ioaddr)
- return -EINVAL;
- host->name = dev->name;
- host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
- host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
- host->max_clk = clk_rate;
- host->mmc = &plat->mmc;
- host->mmc->dev = dev;
- ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
- if (ret)
- return ret;
- host->mmc->priv = host;
- upriv->mmc = host->mmc;
- ret = sdhci_probe(dev);
- if (ret)
- return ret;
- if (!dev_read_bool(dev, "microchip,use-sdcd")) {
- // Use workaround 1 for erratum #15 by default
- u8 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
- ctrl = (ctrl & ~SDHCI_CTRL_CD_TEST_INS) | SDHCI_CTRL_CD_TEST;
- sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
- }
- return 0;
- }
- static int pic32_sdhci_bind(struct udevice *dev)
- {
- struct pic32_sdhci_plat *plat = dev_get_plat(dev);
- return sdhci_bind(dev, &plat->mmc, &plat->cfg);
- }
- static const struct udevice_id pic32_sdhci_ids[] = {
- { .compatible = "microchip,pic32mzda-sdhci" },
- { }
- };
- U_BOOT_DRIVER(pic32_sdhci_drv) = {
- .name = "pic32_sdhci",
- .id = UCLASS_MMC,
- .of_match = pic32_sdhci_ids,
- .ops = &sdhci_ops,
- .bind = pic32_sdhci_bind,
- .probe = pic32_sdhci_probe,
- .priv_auto = sizeof(struct sdhci_host),
- .plat_auto = sizeof(struct pic32_sdhci_plat)
- };
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