/*
 * Critical Link MityOMAP-L138 SoM
 *
 * Copyright (C) 2010 Critical Link LLC - http://www.criticallink.com
 *
 * This file is licensed under the terms of the GNU General Public License
 * version 2. This program is licensed "as is" without any warranty of
 * any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/console.h>
#include <linux/platform_device.h>
#include <linux/mtd/partitions.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
#include <linux/i2c/at24.h>
#include <linux/etherdevice.h>
#include <linux/spi/spi.h>
#include <linux/spi/flash.h>

#include <asm/io.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <mach/common.h>
#include <mach/cp_intc.h>
#include <mach/da8xx.h>
#include <linux/platform_data/mtd-davinci.h>
#include <mach/mux.h>
#include <linux/platform_data/spi-davinci.h>

#define MITYOMAPL138_PHY_ID		""

#define FACTORY_CONFIG_MAGIC	0x012C0138
#define FACTORY_CONFIG_VERSION	0x00010001

/* Data Held in On-Board I2C device */
struct factory_config {
	u32	magic;
	u32	version;
	u8	mac[6];
	u32	fpga_type;
	u32	spare;
	u32	serialnumber;
	char	partnum[32];
};

static struct factory_config factory_config;

struct part_no_info {
	const char	*part_no;	/* part number string of interest */
	int		max_freq;	/* khz */
};

static struct part_no_info mityomapl138_pn_info[] = {
	{
		.part_no	= "L138-C",
		.max_freq	= 300000,
	},
	{
		.part_no	= "L138-D",
		.max_freq	= 375000,
	},
	{
		.part_no	= "L138-F",
		.max_freq	= 456000,
	},
	{
		.part_no	= "1808-C",
		.max_freq	= 300000,
	},
	{
		.part_no	= "1808-D",
		.max_freq	= 375000,
	},
	{
		.part_no	= "1808-F",
		.max_freq	= 456000,
	},
	{
		.part_no	= "1810-D",
		.max_freq	= 375000,
	},
};

#ifdef CONFIG_CPU_FREQ
static void mityomapl138_cpufreq_init(const char *partnum)
{
	int i, ret;

	for (i = 0; partnum && i < ARRAY_SIZE(mityomapl138_pn_info); i++) {
		/*
		 * the part number has additional characters beyond what is
		 * stored in the table.  This information is not needed for
		 * determining the speed grade, and would require several
		 * more table entries.  Only check the first N characters
		 * for a match.
		 */
		if (!strncmp(partnum, mityomapl138_pn_info[i].part_no,
			     strlen(mityomapl138_pn_info[i].part_no))) {
			da850_max_speed = mityomapl138_pn_info[i].max_freq;
			break;
		}
	}

	ret = da850_register_cpufreq("pll0_sysclk3");
	if (ret)
		pr_warning("cpufreq registration failed: %d\n", ret);
}
#else
static void mityomapl138_cpufreq_init(const char *partnum) { }
#endif

static void read_factory_config(struct memory_accessor *a, void *context)
{
	int ret;
	const char *partnum = NULL;
	struct davinci_soc_info *soc_info = &davinci_soc_info;

	ret = a->read(a, (char *)&factory_config, 0, sizeof(factory_config));
	if (ret != sizeof(struct factory_config)) {
		pr_warning("MityOMAPL138: Read Factory Config Failed: %d\n",
				ret);
		goto bad_config;
	}

	if (factory_config.magic != FACTORY_CONFIG_MAGIC) {
		pr_warning("MityOMAPL138: Factory Config Magic Wrong (%X)\n",
				factory_config.magic);
		goto bad_config;
	}

	if (factory_config.version != FACTORY_CONFIG_VERSION) {
		pr_warning("MityOMAPL138: Factory Config Version Wrong (%X)\n",
				factory_config.version);
		goto bad_config;
	}

	pr_info("MityOMAPL138: Found MAC = %pM\n", factory_config.mac);
	if (is_valid_ether_addr(factory_config.mac))
		memcpy(soc_info->emac_pdata->mac_addr,
			factory_config.mac, ETH_ALEN);
	else
		pr_warning("MityOMAPL138: Invalid MAC found "
				"in factory config block\n");

	partnum = factory_config.partnum;
	pr_info("MityOMAPL138: Part Number = %s\n", partnum);

bad_config:
	/* default maximum speed is valid for all platforms */
	mityomapl138_cpufreq_init(partnum);
}

static struct at24_platform_data mityomapl138_fd_chip = {
	.byte_len	= 256,
	.page_size	= 8,
	.flags		= AT24_FLAG_READONLY | AT24_FLAG_IRUGO,
	.setup		= read_factory_config,
	.context	= NULL,
};

static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
	.bus_freq	= 100,	/* kHz */
	.bus_delay	= 0,	/* usec */
};

/* TPS65023 voltage regulator support */
/* 1.2V Core */
static struct regulator_consumer_supply tps65023_dcdc1_consumers[] = {
	{
		.supply = "cvdd",
	},
};

/* 1.8V */
static struct regulator_consumer_supply tps65023_dcdc2_consumers[] = {
	{
		.supply = "usb0_vdda18",
	},
	{
		.supply = "usb1_vdda18",
	},
	{
		.supply = "ddr_dvdd18",
	},
	{
		.supply = "sata_vddr",
	},
};

/* 1.2V */
static struct regulator_consumer_supply tps65023_dcdc3_consumers[] = {
	{
		.supply = "sata_vdd",
	},
	{
		.supply = "usb_cvdd",
	},
	{
		.supply = "pll0_vdda",
	},
	{
		.supply = "pll1_vdda",
	},
};

/* 1.8V Aux LDO, not used */
static struct regulator_consumer_supply tps65023_ldo1_consumers[] = {