drivers/mmc/pic32_sdhci.c

   1 /*
   2  * Support of SDHCI for Microchip PIC32 SoC.
   3  *
   4  * Copyright (C) 2015 Microchip Technology Inc.
   5  * Andrei Pistirica <andrei.pistirica@microchip.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <dm.h>
  11 #include <common.h>
  12 #include <sdhci.h>
  13 #include <asm/errno.h>
  14 #include <mach/pic32.h>
  15
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 static int pic32_sdhci_probe(struct udevice *dev)
  19 {
  20         struct sdhci_host *host = dev_get_priv(dev);
  21         const void *fdt = gd->fdt_blob;
  22         u32 f_min_max[2];
  23         fdt_addr_t addr;
  24         fdt_size_t size;
  25         int ret;
  26
  27         addr = fdtdec_get_addr_size(fdt, dev->of_offset, "reg", &size);
  28         if (addr == FDT_ADDR_T_NONE)
  29                 return -EINVAL;
  30
  31         host->ioaddr    = ioremap(addr, size);
  32         host->name      = dev->name;
  33         host->quirks    = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_NO_CD;
  34         host->bus_width = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
  35                                         "bus-width", 4);
  36
  37         ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset,
  38                                    "clock-freq-min-max", f_min_max, 2);
  39         if (ret) {
  40                 printf("sdhci: clock-freq-min-max not found\n");
  41                 return ret;
  42         }
  43
  44         return add_sdhci(host, f_min_max[1], f_min_max[0]);
  45 }
  46
  47 static const struct udevice_id pic32_sdhci_ids[] = {
  48         { .compatible = "microchip,pic32mzda-sdhci" },
  49         { }
  50 };
  51
  52 U_BOOT_DRIVER(pic32_sdhci_drv) = {
  53         .name                   = "pic32_sdhci",
  54         .id                     = UCLASS_MMC,
  55         .of_match               = pic32_sdhci_ids,
  56         .probe                  = pic32_sdhci_probe,
  57         .priv_auto_alloc_size   = sizeof(struct sdhci_host),
  58 };