drivers/mmc/zynq_sdhci.c

   1 /*
   2  * (C) Copyright 2013 Inc.
   3  *
   4  * Xilinx Zynq SD Host Controller Interface
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <fdtdec.h>
  11 #include <libfdt.h>
  12 #include <malloc.h>
  13 #include <sdhci.h>
  14 #include <asm/arch/sys_proto.h>
  15
  16 int zynq_sdhci_init(phys_addr_t regbase)
  17 {
  18         struct sdhci_host *host = NULL;
  19
  20         host = (struct sdhci_host *)malloc(sizeof(struct sdhci_host));
  21         if (!host) {
  22                 printf("zynq_sdhci_init: sdhci_host malloc fail\n");
  23                 return 1;
  24         }
  25
  26         host->name = "zynq_sdhci";
  27         host->ioaddr = (void *)regbase;
  28         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
  29                        SDHCI_QUIRK_BROKEN_R1B;
  30         host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
  31
  32         add_sdhci(host, CONFIG_ZYNQ_SDHCI_MAX_FREQ, 52000000 >> 9);
  33         return 0;
  34 }
  35
  36 #if CONFIG_IS_ENABLED(OF_CONTROL)
  37 int zynq_sdhci_of_init(const void *blob)
  38 {
  39         int offset = 0;
  40         u32 ret = 0;
  41         phys_addr_t reg;
  42
  43         debug("ZYNQ SDHCI: Initialization\n");
  44
  45         do {
  46                 offset = fdt_node_offset_by_compatible(blob, offset,
  47                                         "arasan,sdhci-8.9a");
  48                 if (offset != -1) {
  49                         reg = fdtdec_get_addr(blob, offset, "reg");
  50                         if (reg != FDT_ADDR_T_NONE) {
  51                                 ret |= zynq_sdhci_init(reg);
  52                         } else {
  53                                 debug("ZYNQ SDHCI: Can't get base address\n");
  54                                 return -1;
  55                         }
  56                 }
  57         } while (offset != -1);
  58
  59         return ret;
  60 }
  61 #endif