LXR linux/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 */
  34static 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
  58static struct dm9000_plat_data dm9000_platdata = {
  59        .flags          = DM9000_PLATF_32BITONLY,
  60};
  61
  62static 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
  73static 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 */
  82static 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
 100static struct physmap_flash_data flash_data = {
 101        .parts          = amcore_partitions,
 102        .nr_parts       = ARRAY_SIZE(amcore_partitions),
 103        .width          = 2,
 104};
 105
 106static struct resource flash_resource = {
 107        .start          = 0xffc00000,
 108        .end            = 0xffffffff,
 109        .flags          = IORESOURCE_MEM,
 110};
 111
 112static 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
 122static struct platform_device rtc_device = {
 123        .name   = "rtc-ds1307",
 124        .id     = -1,
 125};
 126
 127static struct i2c_board_info amcore_i2c_info[] __initdata = {
 128        {
 129                I2C_BOARD_INFO("ds1338", 0x68),
 130        },
 131};
 132
 133static 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
 141static 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
 156arch_initcall(init_amcore);
 157