1 // SPDX-License-Identifier: GPL-2.0+
3 * Support of SDHCI for Microchip PIC32 SoC.
5 * Copyright (C) 2015 Microchip Technology Inc.
6 * Andrei Pistirica <andrei.pistirica@microchip.com>
12 #include <linux/errno.h>
13 #include <mach/pic32.h>
15 struct pic32_sdhci_plat {
16 struct mmc_config cfg;
20 static int pic32_sdhci_probe(struct udevice *dev)
22 struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
23 struct pic32_sdhci_plat *plat = dev_get_plat(dev);
24 struct sdhci_host *host = dev_get_priv(dev);
30 ret = clk_get_by_name(dev, "base_clk", &clk);
34 clk_rate = clk_get_rate(&clk);
37 if (IS_ERR_VALUE(clk_rate))
40 host->ioaddr = dev_remap_addr(dev);
45 host->name = dev->name;
46 host->quirks = SDHCI_QUIRK_NO_HISPD_BIT;
47 host->bus_width = dev_read_u32_default(dev, "bus-width", 4);
48 host->max_clk = clk_rate;
50 host->mmc = &plat->mmc;
53 ret = sdhci_setup_cfg(&plat->cfg, host, 0, 0);
57 host->mmc->priv = host;
58 upriv->mmc = host->mmc;
60 ret = sdhci_probe(dev);
64 if (!dev_read_bool(dev, "microchip,use-sdcd")) {
65 // Use workaround 1 for erratum #15 by default
66 u8 ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
67 ctrl = (ctrl & ~SDHCI_CTRL_CD_TEST_INS) | SDHCI_CTRL_CD_TEST;
68 sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
74 static int pic32_sdhci_bind(struct udevice *dev)
76 struct pic32_sdhci_plat *plat = dev_get_plat(dev);
78 return sdhci_bind(dev, &plat->mmc, &plat->cfg);
81 static const struct udevice_id pic32_sdhci_ids[] = {
82 { .compatible = "microchip,pic32mzda-sdhci" },
86 U_BOOT_DRIVER(pic32_sdhci_drv) = {
87 .name = "pic32_sdhci",
89 .of_match = pic32_sdhci_ids,
91 .bind = pic32_sdhci_bind,
92 .probe = pic32_sdhci_probe,
93 .priv_auto = sizeof(struct sdhci_host),
94 .plat_auto = sizeof(struct pic32_sdhci_plat)