arch/arm/plat-mxc/devices/platform-imx-dma.c

   1 /*
   2  * Copyright (C) 2010 Pengutronix
   3  * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under
   6  * the terms of the GNU General Public License version 2 as published by the
   7  * Free Software Foundation.
   8  */
   9 #include <linux/compiler.h>
  10 #include <linux/err.h>
  11 #include <linux/init.h>
  12
  13 #include <mach/hardware.h>
  14 #include <mach/devices-common.h>
  15 #include <mach/sdma.h>
  16
  17 struct imx_imx_sdma_data {
  18         resource_size_t iobase;
  19         resource_size_t irq;
  20         struct sdma_platform_data pdata;
  21 };
  22
  23 #define imx_imx_sdma_data_entry_single(soc, _sdma_version, _cpu_name, _to_version)\
  24         {                                                               \
  25                 .iobase = soc ## _SDMA ## _BASE_ADDR,                   \
  26                 .irq = soc ## _INT_SDMA,                                \
  27                 .pdata = {                                              \
  28                         .sdma_version = _sdma_version,                  \
  29                         .cpu_name = _cpu_name,                          \
  30                         .to_version = _to_version,                      \
  31                 },                                                      \
  32         }
  33
  34 #ifdef CONFIG_ARCH_MX25
  35 const struct imx_imx_sdma_data imx25_imx_sdma_data __initconst =
  36         imx_imx_sdma_data_entry_single(MX25, 1, "imx25", 0);
  37 #endif /* ifdef CONFIG_ARCH_MX25 */
  38
  39 #ifdef CONFIG_ARCH_MX31
  40 struct imx_imx_sdma_data imx31_imx_sdma_data __initdata =
  41         imx_imx_sdma_data_entry_single(MX31, 1, "imx31", 0);
  42 #endif /* ifdef CONFIG_ARCH_MX31 */
  43
  44 #ifdef CONFIG_ARCH_MX35
  45 struct imx_imx_sdma_data imx35_imx_sdma_data __initdata =
  46         imx_imx_sdma_data_entry_single(MX35, 2, "imx35", 0);
  47 #endif /* ifdef CONFIG_ARCH_MX35 */
  48
  49 #ifdef CONFIG_ARCH_MX51
  50 const struct imx_imx_sdma_data imx51_imx_sdma_data __initconst =
  51         imx_imx_sdma_data_entry_single(MX51, 2, "imx51", 0);
  52 #endif /* ifdef CONFIG_ARCH_MX51 */
  53
  54 static struct platform_device __init __maybe_unused *imx_add_imx_sdma(
  55                 const struct imx_imx_sdma_data *data)
  56 {
  57         struct resource res[] = {
  58                 {
  59                         .start = data->iobase,
  60                         .end = data->iobase + SZ_4K - 1,
  61                         .flags = IORESOURCE_MEM,
  62                 }, {
  63                         .start = data->irq,
  64                         .end = data->irq,
  65                         .flags = IORESOURCE_IRQ,
  66                 },
  67         };
  68
  69         return imx_add_platform_device("imx-sdma", -1,
  70                         res, ARRAY_SIZE(res),
  71                         &data->pdata, sizeof(data->pdata));
  72 }
  73
  74 static struct platform_device __init __maybe_unused *imx_add_imx_dma(void)
  75 {
  76         return imx_add_platform_device("imx-dma", -1, NULL, 0, NULL, 0);
  77 }
  78
  79 static int __init imxXX_add_imx_dma(void)
  80 {
  81         struct platform_device *ret;
  82
  83 #if defined(CONFIG_SOC_IMX21) || defined(CONFIG_SOC_IMX27)
  84         if (cpu_is_mx21() || cpu_is_mx27())
  85                 ret = imx_add_imx_dma();
  86         else
  87 #endif
  88
  89 #if defined(CONFIG_ARCH_MX25)
  90         if (cpu_is_mx25())
  91                 ret = imx_add_imx_sdma(&imx25_imx_sdma_data);
  92         else
  93 #endif
  94
  95 #if defined(CONFIG_ARCH_MX31)
  96         if (cpu_is_mx31()) {
  97                 imx31_imx_sdma_data.pdata.to_version = mx31_revision() >> 4;
  98                 ret = imx_add_imx_sdma(&imx31_imx_sdma_data);
  99         } else
 100 #endif
 101
 102 #if defined(CONFIG_ARCH_MX35)
 103         if (cpu_is_mx35()) {
 104                 imx35_imx_sdma_data.pdata.to_version = mx35_revision() >> 4;
 105                 ret = imx_add_imx_sdma(&imx35_imx_sdma_data);
 106         } else
 107 #endif
 108
 109 #if defined(CONFIG_ARCH_MX51)
 110         if (cpu_is_mx51())
 111                 ret = imx_add_imx_sdma(&imx51_imx_sdma_data);
 112         else
 113 #endif
 114                 ret = ERR_PTR(-ENODEV);
 115
 116         if (IS_ERR(ret))
 117                 return PTR_ERR(ret);
 118
 119         return 0;
 120 }
 121 arch_initcall(imxXX_add_imx_dma);