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 #ifdef SDMA_IS_MERGED
  16 #include <mach/sdma.h>
  17 #else
  18 struct sdma_platform_data {
  19         int sdma_version;
  20         char *cpu_name;
  21         int to_version;
  22 };
  23 #endif
  24
  25 struct imx_imx_sdma_data {
  26         resource_size_t iobase;
  27         resource_size_t irq;
  28         struct sdma_platform_data pdata;
  29 };
  30
  31 #define imx_imx_sdma_data_entry_single(soc, _sdma_version, _cpu_name, _to_version)\
  32         {                                                               \
  33                 .iobase = soc ## _SDMA ## _BASE_ADDR,                   \
  34                 .irq = soc ## _INT_SDMA,                                \
  35                 .pdata = {                                              \
  36                         .sdma_version = _sdma_version,                  \
  37                         .cpu_name = _cpu_name,                          \
  38                         .to_version = _to_version,                      \
  39                 },                                                      \
  40         }
  41
  42 #ifdef CONFIG_ARCH_MX25
  43 const struct imx_imx_sdma_data imx25_imx_sdma_data __initconst =
  44         imx_imx_sdma_data_entry_single(MX25, 1, "imx25", 0);
  45 #endif /* ifdef CONFIG_ARCH_MX25 */
  46
  47 #ifdef CONFIG_ARCH_MX31
  48 struct imx_imx_sdma_data imx31_imx_sdma_data __initdata =
  49         imx_imx_sdma_data_entry_single(MX31, 1, "imx31", 0);
  50 #endif /* ifdef CONFIG_ARCH_MX31 */
  51
  52 #ifdef CONFIG_ARCH_MX35
  53 struct imx_imx_sdma_data imx35_imx_sdma_data __initdata =
  54         imx_imx_sdma_data_entry_single(MX35, 2, "imx35", 0);
  55 #endif /* ifdef CONFIG_ARCH_MX35 */
  56
  57 #ifdef CONFIG_ARCH_MX51
  58 const struct imx_imx_sdma_data imx51_imx_sdma_data __initconst =
  59         imx_imx_sdma_data_entry_single(MX51, 2, "imx51", 0);
  60 #endif /* ifdef CONFIG_ARCH_MX51 */
  61
  62 static struct platform_device __init __maybe_unused *imx_add_imx_sdma(
  63                 const struct imx_imx_sdma_data *data)
  64 {
  65         struct resource res[] = {
  66                 {
  67                         .start = data->iobase,
  68                         .end = data->iobase + SZ_4K - 1,
  69                         .flags = IORESOURCE_MEM,
  70                 }, {
  71                         .start = data->irq,
  72                         .end = data->irq,
  73                         .flags = IORESOURCE_IRQ,
  74                 },
  75         };
  76
  77         return imx_add_platform_device("imx-sdma", -1,
  78                         res, ARRAY_SIZE(res),
  79                         &data->pdata, sizeof(data->pdata));
  80 }
  81
  82 static struct platform_device __init __maybe_unused *imx_add_imx_dma(void)
  83 {
  84         return imx_add_platform_device("imx-dma", -1, NULL, 0, NULL, 0);
  85 }
  86
  87 static int __init imxXX_add_imx_dma(void)
  88 {
  89         struct platform_device *ret;
  90
  91 #if defined(CONFIG_SOC_IMX21) || defined(CONFIG_SOC_IMX27)
  92         if (cpu_is_mx21() || cpu_is_mx27())
  93                 ret = imx_add_imx_dma();
  94         else
  95 #endif
  96
  97 #if defined(CONFIG_ARCH_MX25)
  98         if (cpu_is_mx25())
  99                 ret = imx_add_imx_sdma(&imx25_imx_sdma_data);
 100         else
 101 #endif
 102
 103 #if defined(CONFIG_ARCH_MX31)
 104         if (cpu_is_mx31()) {
 105                 imx31_imx_sdma_data.pdata.to_version = mx31_revision() >> 4;
 106                 ret = imx_add_imx_sdma(&imx31_imx_sdma_data);
 107         } else
 108 #endif
 109
 110 #if defined(CONFIG_ARCH_MX35)
 111         if (cpu_is_mx35()) {
 112                 imx35_imx_sdma_data.pdata.to_version = mx35_revision() >> 4;
 113                 ret = imx_add_imx_sdma(&imx35_imx_sdma_data);
 114         } else
 115 #endif
 116
 117 #if defined(CONFIG_ARCH_MX51)
 118         if (cpu_is_mx51())
 119                 ret = imx_add_imx_sdma(&imx51_imx_sdma_data);
 120         else
 121 #endif
 122                 ret = ERR_PTR(-ENODEV);
 123
 124         if (IS_ERR(ret))
 125                 return PTR_ERR(ret);
 126
 127         return 0;
 128 }
 129 arch_initcall(imxXX_add_imx_dma);