/*
 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
 *                       <armlinux@phytec.de>
 *
 * Copyright (C) 2004-2011 Freescale Semiconductor, Inc.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */
#include <common.h>
#include <asm/io.h>
#include <asm/arch/mx6.h>
#include <asm/arch/mx6_pins.h>
#include <asm/arch/iomux-v3.h>

static void *base;

/*
 * configures a single pad in the iomuxer
 */
int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
{
	u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
	u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
	u32 sel_input_ofs =
		(pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
	u32 sel_input =
		(pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
	u32 pad_ctrl_ofs =
		(pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
	u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;

	if (mux_ctrl_ofs)
		__raw_writel(mux_mode, base + mux_ctrl_ofs);

	if (sel_input_ofs)
		__raw_writel(sel_input, base + sel_input_ofs);

	if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
		__raw_writel(pad_ctrl, base + pad_ctrl_ofs);

	return 0;
}

int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
{
	iomux_v3_cfg_t *p = pad_list;
	int i;
	int ret;

	for (i = 0; i < count; i++) {
		ret = mxc_iomux_v3_setup_pad(*p);
		if (ret)
			return ret;
		p++;
	}
	return 0;
}

void mxc_iomux_set_gpr_register(int group, int start_bit, int num_bits, int value)
{
	int i = 0;
	u32 reg;
	reg = readl(base + group * 4);
	while (num_bits) {
		reg &= ~(1<<(start_bit + i));
		i++;
		num_bits--;
	}
	reg |= (value << start_bit);
	writel(reg, base + group * 4);
}

void mxc_iomux_v3_init(void *iomux_v3_base)
{
	base = iomux_v3_base;
}