/*
 * pcm051 - phyCORE-AM335x Board Initalization Code
 *
 * Copyright (C) 2012 Teresa Gámez, Phytec Messtechnik GmbH
 *
 * Based on arch/arm/boards/omap/board-beagle.c
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

#include <bootsource.h>
#include <common.h>
#include <nand.h>
#include <init.h>
#include <io.h>
#include <net.h>
#include <sizes.h>
#include <envfs.h>
#include <asm/armlinux.h>
#include <generated/mach-types.h>
#include <linux/phy.h>
#include <mach/am33xx-generic.h>
#include <mach/am33xx-silicon.h>
#include <mach/am33xx-devices.h>
#include <mach/bbu.h>
#include <i2c/i2c.h>

#define SOBJB_EE_MAGIC		0x50b0d0ee

static int sysmocom_odu_eth_init(void)
{
	struct i2c_adapter *adapter;
	struct i2c_client client;
	uint32_t magic;
	char mac[6];
	int ret, ix;

	adapter = i2c_get_adapter(0);
	if (!adapter) {
		pr_err("[ODU] Failed to obtain I2C adapter 0 reference\n");
		return -4;
	}
	client.addr = 0x50;
	client.adapter = adapter;

	ret = i2c_read_reg(&client, 0, (uint8_t *)&magic, sizeof(magic));
	if (ret != sizeof(magic)) {
		pr_err("[ODU] Reading %d instead of %u\n", ret, sizeof(magic));
		return -1;
	}

	if (magic != SOBJB_EE_MAGIC) {
		pr_err("[ODU] Wrong magic (0x%08x != 0x%08x\n", magic, SOBJB_EE_MAGIC);
		return -2;
	}

	for (ix = 0; ix < 2; ix++) {
		int mac_offset;

		/* offsetof(sob_odu_eeprom, mac_eth0) = 24 */
		mac_offset = 24 + (sizeof(mac) * ix);
		ret = i2c_read_reg(&client, mac_offset, mac, sizeof(mac));
		if (ret != sizeof(mac)) {
			pr_err("[ODU] Failed to read MAC address\n");
			return -3;
		} else {
			pr_err("[ODU] Registering EEPROM MAC address\n");
			eth_register_ethaddr(ix, mac);
		}
	}

	return 0;
}

static int pcm051_coredevice_init(void)
{
	if (!of_machine_is_compatible("phytec,pcm051"))
		return 0;

	return 0;
}
coredevice_initcall(pcm051_coredevice_init);

static struct omap_barebox_part pcm051_barebox_part = {
	.nand_offset = SZ_512K,
	.nand_size = SZ_512K,
	.nor_offset = SZ_128K,
	.nor_size = SZ_512K,
};

static char *xloadslots[] = {
	"/dev/nand0.xload.bb",
	"/dev/nand0.xload_backup1.bb",
	"/dev/nand0.xload_backup2.bb",
	"/dev/nand0.xload_backup3.bb"
};

static int pcm051_devices_init(void)
{
	if (!of_machine_is_compatible("phytec,pcm051"))
		return 0;

	/* First try to retrieve MAC address from SOB-ODU (>= v3) EEPROM */
	if (sysmocom_odu_eth_init() < 0)
		am33xx_register_ethaddr(0, 0);

	switch (bootsource_get()) {
	case BOOTSOURCE_SPI:
		of_device_enable_path("/chosen/environment-spi");
		break;
	case BOOTSOURCE_MMC:
		omap_set_bootmmc_devname("mmc0");
		break;
	default:
		of_device_enable_path("/chosen/environment-nand");
		break;
	}

	omap_set_barebox_part(&pcm051_barebox_part);
	armlinux_set_architecture(MACH_TYPE_PCM051);
	defaultenv_append_directory(defaultenv_phycore_am335x);

	am33xx_bbu_spi_nor_mlo_register_handler("MLO.spi", "/dev/m25p0.xload");
	am33xx_bbu_nand_xloadslots_register_handler("MLO.nand",
		xloadslots, ARRAY_SIZE(xloadslots));

	return 0;
}
device_initcall(pcm051_devices_init);