/*
 * amcore.c -- Support for Sysam AMCORE open board
 *
 * (C) Copyright 2016, Angelo Dureghello <angelo@sysam.it>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/dm9000.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/mtd/physmap.h>
#include <linux/i2c.h>

#include <asm/coldfire.h>
#include <asm/mcfsim.h>
#include <asm/io.h>

#if IS_ENABLED(CONFIG_DM9000)

#define DM9000_IRQ      25
#define DM9000_ADDR     0x30000000

/*
 * DEVICES and related device RESOURCES
 */
static struct resource dm9000_resources[] = {
        /* physical address of the address register (CMD [A2] to 0)*/
        [0] = {
                .start  = DM9000_ADDR,
                .end    = DM9000_ADDR,
                .flags  = IORESOURCE_MEM,
        },
        /*
         * physical address of the data register (CMD [A2] to 1),
         * driver wants a range >=4 to assume a 32bit data bus
         */
        [1] = {
                .start  = DM9000_ADDR + 4,
                .end    = DM9000_ADDR + 7,
                .flags  = IORESOURCE_MEM,
        },
        /* IRQ line the device's interrupt pin is connected to */
        [2] = {
                .start  = DM9000_IRQ,
                .end    = DM9000_IRQ,
                .flags  = IORESOURCE_IRQ,
        },
};

static struct dm9000_plat_data dm9000_platdata = {
        .flags          = DM9000_PLATF_32BITONLY,
};

static struct platform_device dm9000_device = {
        .name           = "dm9000",
        .id             = 0,
        .num_resources  = ARRAY_SIZE(dm9000_resources),
        .resource       = dm9000_resources,
        .dev = {
                .platform_data = &dm9000_platdata,
        }
};
#endif

static void __init dm9000_pre_init(void)
{
        /* Set the dm9000 interrupt to be auto-vectored */
        mcf_autovector(DM9000_IRQ);
}

/*
 * Partitioning of parallel NOR flash (39VF3201B)
 */
static struct mtd_partition amcore_partitions[] = {
        {
                .name   = "U-Boot (128K)",
                .size   = 0x20000,
                .offset = 0x0
        },
        {
                .name   = "Kernel+ROMfs (2994K)",
                .size   = 0x2E0000,
                .offset = MTDPART_OFS_APPEND
        },
        {
                .name   = "Flash Free Space (1024K)",
                .size   = MTDPART_SIZ_FULL,
                .offset = MTDPART_OFS_APPEND
        }
};

static struct physmap_flash_data flash_data = {
        .parts          = amcore_partitions,
        .nr_parts       = ARRAY_SIZE(amcore_partitions),
        .width          = 2,
};

static struct resource flash_resource = {
        .start          = 0xffc00000,
        .end            = 0xffffffff,
        .flags          = IORESOURCE_MEM,
};

static struct platform_device flash_device = {
        .name           = "physmap-flash",
        .id             = -1,
        .resource       = &flash_resource,
        .num_resources  = 1,
        .dev            = {
                .platform_data  = &flash_data,
        },
};

static struct platform_device rtc_device = {
        .name   = "rtc-ds1307",
        .id     = -1,
};

static struct i2c_board_info amcore_i2c_info[] __initdata = {
        {
                I2C_BOARD_INFO("ds1338", 0x68),
        },
};

static struct platform_device *amcore_devices[] __initdata = {
#if IS_ENABLED(CONFIG_DM9000)
        &dm9000_device,
#endif
        &flash_device,
        &rtc_device,
};

static int __init init_amcore(void)
{
#if IS_ENABLED(CONFIG_DM9000)
        dm9000_pre_init();
#endif

        /* Add i2c RTC Dallas chip supprt */
        i2c_register_board_info(0, amcore_i2c_info,
                                ARRAY_SIZE(amcore_i2c_info));

        platform_add_devices(amcore_devices, ARRAY_SIZE(amcore_devices));

        return 0;
}

arch_initcall(init_amcore);