arch/arm/mach-exynos4/dev-dwmci.c

   1 /*
   2  * linux/arch/arm/mach-exynos4/dev-dwmci.c
   3  *
   4  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   5  *              http://www.samsung.com
   6  *
   7  * Platform device for Synopsys DesignWare Mobile Storage IP
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/dma-mapping.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/mmc/dw_mmc.h>
  20
  21 #include <plat/devs.h>
  22
  23 #include <mach/map.h>
  24
  25 static int exynos4_dwmci_get_bus_wd(u32 slot_id)
  26 {
  27         return 4;
  28 }
  29
  30 static int exynos4_dwmci_init(u32 slot_id, irq_handler_t handler, void *data)
  31 {
  32         return 0;
  33 }
  34
  35 static struct resource exynos4_dwmci_resource[] = {
  36         [0] = {
  37                 .start  = EXYNOS4_PA_DWMCI,
  38                 .end    = EXYNOS4_PA_DWMCI + SZ_4K - 1,
  39                 .flags  = IORESOURCE_MEM,
  40         },
  41         [1] = {
  42                 .start  = IRQ_DWMCI,
  43                 .end    = IRQ_DWMCI,
  44                 .flags  = IORESOURCE_IRQ,
  45         }
  46 };
  47
  48 static struct dw_mci_board exynos4_dwci_pdata = {
  49         .num_slots                      = 1,
  50         .quirks                         = DW_MCI_QUIRK_BROKEN_CARD_DETECTION,
  51         .bus_hz                         = 80 * 1000 * 1000,
  52         .detect_delay_ms        = 200,
  53         .init                           = exynos4_dwmci_init,
  54         .get_bus_wd                     = exynos4_dwmci_get_bus_wd,
  55 };
  56
  57 static u64 exynos4_dwmci_dmamask = DMA_BIT_MASK(32);
  58
  59 struct platform_device exynos4_device_dwmci = {
  60         .name           = "dw_mmc",
  61         .id             = -1,
  62         .num_resources  = ARRAY_SIZE(exynos4_dwmci_resource),
  63         .resource       = exynos4_dwmci_resource,
  64         .dev            = {
  65                 .dma_mask               = &exynos4_dwmci_dmamask,
  66                 .coherent_dma_mask      = DMA_BIT_MASK(32),
  67                 .platform_data  = &exynos4_dwci_pdata,
  68         },
  69 };
  70
  71 void __init exynos4_dwmci_set_platdata(struct dw_mci_board *pd)
  72 {
  73         struct dw_mci_board *npd;
  74
  75         npd = s3c_set_platdata(pd, sizeof(struct dw_mci_board),
  76                         &exynos4_device_dwmci);
  77
  78         if (!npd->init)
  79                 npd->init = exynos4_dwmci_init;
  80         if (!npd->get_bus_wd)
  81                 npd->get_bus_wd = exynos4_dwmci_get_bus_wd;
  82 }