/*
   * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
   * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
   * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
   *                       <armlinux@phytec.de>
   *
   * 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 <linux/errno.h>
  #include <linux/init.h>
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/string.h>
  #include <linux/gpio.h>
  
  #include <mach/hardware.h>
  #include <asm/mach/map.h>
  #include <mach/iomux-v3.h>

  static void __iomem *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;
  }
  EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);

  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;

  }
  EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);

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