LXR uboot/drivers/mmc/pic32

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Support of SDHCI for Microchip PIC32 SoC.
   4 *
   5 * Copyright (C) 2015 Microchip Technology Inc.
   6 * Andrei Pistirica <andrei.pistirica@microchip.com>
   7 */
   8
   9#include <common.h>
  10#include <dm.h>
  11#include <sdhci.h>
  12#include <linux/errno.h>
  13#include <mach/pic32.h>
  14
  15DECLARE_GLOBAL_DATA_PTR;
  16
  17static int pic32_sdhci_get_cd(struct sdhci_host *host)
  18{
  19        /* PIC32 SDHCI CD errata:
  20         * - set CD_TEST and clear CD_TEST_INS bit
  21         */
  22        sdhci_writeb(host, SDHCI_CTRL_CD_TEST, SDHCI_HOST_CONTROL);
  23
  24        return 0;
  25}
  26
  27static const struct sdhci_ops pic32_sdhci_ops = {
  28        .get_cd = pic32_sdhci_get_cd,
  29};
  30
  31static int pic32_sdhci_probe(struct udevice *dev)
  32{
  33        struct sdhci_host *host = dev_get_priv(dev);
  34        const void *fdt = gd->fdt_blob;
  35        u32 f_min_max[2];
  36        fdt_addr_t addr;
  37        fdt_size_t size;
  38        int ret;
  39
  40        addr = fdtdec_get_addr_size(fdt, dev_of_offset(dev), "reg", &size);
  41        if (addr == FDT_ADDR_T_NONE)
  42                return -EINVAL;
  43
  44        host->ioaddr    = ioremap(addr, size);
  45        host->name      = dev->name;
  46        host->quirks    = SDHCI_QUIRK_NO_HISPD_BIT;
  47        host->bus_width = fdtdec_get_int(gd->fdt_blob, dev_of_offset(dev),
  48                                        "bus-width", 4);
  49        host->ops = &pic32_sdhci_ops;
  50
  51        ret = fdtdec_get_int_array(gd->fdt_blob, dev_of_offset(dev),
  52                                   "clock-freq-min-max", f_min_max, 2);
  53        if (ret) {
  54                printf("sdhci: clock-freq-min-max not found\n");
  55                return ret;
  56        }
  57
  58        host->max_clk   = f_min_max[1];
  59
  60        ret = add_sdhci(host, 0, f_min_max[0]);
  61        if (ret)
  62                return ret;
  63        host->mmc->dev = dev;
  64
  65        return 0;
  66}
  67
  68static const struct udevice_id pic32_sdhci_ids[] = {
  69        { .compatible = "microchip,pic32mzda-sdhci" },
  70        { }
  71};
  72
  73U_BOOT_DRIVER(pic32_sdhci_drv) = {
  74        .name                   = "pic32_sdhci",
  75        .id                     = UCLASS_MMC,
  76        .of_match               = pic32_sdhci_ids,
  77        .probe                  = pic32_sdhci_probe,
  78        .priv_auto_alloc_size   = sizeof(struct sdhci_host),
  79};
  80