drivers/mmc/exynos_dw_mmc.c

   1 /*
   2  * (C) Copyright 2012 SAMSUNG Electronics
   3  * Jaehoon Chung <jh80.chung@samsung.com>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,  MA 02111-1307 USA
  18  *
  19  */
  20
  21 #include <common.h>
  22 #include <malloc.h>
  23 #include <dwmmc.h>
  24 #include <asm/arch/dwmmc.h>
  25 #include <asm/arch/clk.h>
  26
  27 static char *EXYNOS_NAME = "EXYNOS DWMMC";
  28
  29 static void exynos_dwmci_clksel(struct dwmci_host *host)
  30 {
  31         u32 val;
  32         val = DWMCI_SET_SAMPLE_CLK(DWMCI_SHIFT_0) |
  33                 DWMCI_SET_DRV_CLK(DWMCI_SHIFT_0) | DWMCI_SET_DIV_RATIO(0);
  34
  35         dwmci_writel(host, DWMCI_CLKSEL, val);
  36 }
  37
  38 int exynos_dwmci_init(u32 regbase, int bus_width, int index)
  39 {
  40         struct dwmci_host *host = NULL;
  41         host = malloc(sizeof(struct dwmci_host));
  42         if (!host) {
  43                 printf("dwmci_host malloc fail!\n");
  44                 return 1;
  45         }
  46
  47         host->name = EXYNOS_NAME;
  48         host->ioaddr = (void *)regbase;
  49         host->buswidth = bus_width;
  50         host->clksel = exynos_dwmci_clksel;
  51         host->dev_index = index;
  52
  53         add_dwmci(host, 52000000, 400000);
  54
  55         return 0;
  56 }
  57