arch/m68k/coldfire/amcore.c

   1 /*
   2  * amcore.c -- Support for Sysam AMCORE open board
   3  *
   4  * (C) Copyright 2016, Angelo Dureghello <angelo@sysam.it>
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file COPYING in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/device.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/dm9000.h>
  14 #include <linux/irq.h>
  15 #include <linux/interrupt.h>
  16 #include <linux/mtd/mtd.h>
  17 #include <linux/mtd/map.h>
  18 #include <linux/mtd/partitions.h>
  19 #include <linux/mtd/physmap.h>
  20 #include <linux/i2c.h>
  21
  22 #include <asm/coldfire.h>
  23 #include <asm/mcfsim.h>
  24 #include <asm/io.h>
  25
  26 #if IS_ENABLED(CONFIG_DM9000)
  27
  28 #define DM9000_IRQ      25
  29 #define DM9000_ADDR     0x30000000
  30
  31 /*
  32  * DEVICES and related device RESOURCES
  33  */
  34 static struct resource dm9000_resources[] = {
  35         /* physical address of the address register (CMD [A2] to 0)*/
  36         [0] = {
  37                 .start  = DM9000_ADDR,
  38                 .end    = DM9000_ADDR,
  39                 .flags  = IORESOURCE_MEM,
  40         },
  41         /*
  42          * physical address of the data register (CMD [A2] to 1),
  43          * driver wants a range >=4 to assume a 32bit data bus
  44          */
  45         [1] = {
  46                 .start  = DM9000_ADDR + 4,
  47                 .end    = DM9000_ADDR + 7,
  48                 .flags  = IORESOURCE_MEM,
  49         },
  50         /* IRQ line the device's interrupt pin is connected to */
  51         [2] = {
  52                 .start  = DM9000_IRQ,
  53                 .end    = DM9000_IRQ,
  54                 .flags  = IORESOURCE_IRQ,
  55         },
  56 };
  57
  58 static struct dm9000_plat_data dm9000_platdata = {
  59         .flags          = DM9000_PLATF_32BITONLY,
  60 };
  61
  62 static struct platform_device dm9000_device = {
  63         .name           = "dm9000",
  64         .id             = 0,
  65         .num_resources  = ARRAY_SIZE(dm9000_resources),
  66         .resource       = dm9000_resources,
  67         .dev = {
  68                 .platform_data = &dm9000_platdata,
  69         }
  70 };
  71 #endif
  72
  73 static void __init dm9000_pre_init(void)
  74 {
  75         /* Set the dm9000 interrupt to be auto-vectored */
  76         mcf_autovector(DM9000_IRQ);
  77 }
  78
  79 /*
  80  * Partitioning of parallel NOR flash (39VF3201B)
  81  */
  82 static struct mtd_partition amcore_partitions[] = {
  83         {
  84                 .name   = "U-Boot (128K)",
  85                 .size   = 0x20000,
  86                 .offset = 0x0
  87         },
  88         {
  89                 .name   = "Kernel+ROMfs (2994K)",
  90                 .size   = 0x2E0000,
  91                 .offset = MTDPART_OFS_APPEND
  92         },
  93         {
  94                 .name   = "Flash Free Space (1024K)",
  95                 .size   = MTDPART_SIZ_FULL,
  96                 .offset = MTDPART_OFS_APPEND
  97         }
  98 };
  99
 100 static struct physmap_flash_data flash_data = {
 101         .parts          = amcore_partitions,
 102         .nr_parts       = ARRAY_SIZE(amcore_partitions),
 103         .width          = 2,
 104 };
 105
 106 static struct resource flash_resource = {
 107         .start          = 0xffc00000,
 108         .end            = 0xffffffff,
 109         .flags          = IORESOURCE_MEM,
 110 };
 111
 112 static struct platform_device flash_device = {
 113         .name           = "physmap-flash",
 114         .id             = -1,
 115         .resource       = &flash_resource,
 116         .num_resources  = 1,
 117         .dev            = {
 118                 .platform_data  = &flash_data,
 119         },
 120 };
 121
 122 static struct platform_device rtc_device = {
 123         .name   = "rtc-ds1307",
 124         .id     = -1,
 125 };
 126
 127 static struct i2c_board_info amcore_i2c_info[] __initdata = {
 128         {
 129                 I2C_BOARD_INFO("ds1338", 0x68),
 130         },
 131 };
 132
 133 static struct platform_device *amcore_devices[] __initdata = {
 134 #if IS_ENABLED(CONFIG_DM9000)
 135         &dm9000_device,
 136 #endif
 137         &flash_device,
 138         &rtc_device,
 139 };
 140
 141 static int __init init_amcore(void)
 142 {
 143 #if IS_ENABLED(CONFIG_DM9000)
 144         dm9000_pre_init();
 145 #endif
 146
 147         /* Add i2c RTC Dallas chip supprt */
 148         i2c_register_board_info(0, amcore_i2c_info,
 149                                 ARRAY_SIZE(amcore_i2c_info));
 150
 151         platform_add_devices(amcore_devices, ARRAY_SIZE(amcore_devices));
 152
 153         return 0;
 154 }
 155
 156 arch_initcall(init_amcore);