/*
   * common-board-devices.c
   *
   * Copyright (C) 2011 CompuLab, Ltd.
   * Author: Mike Rapoport <mike@compulab.co.il>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * version 2 as published by the Free Software Foundation.
   *
   * 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 St, Fifth Floor, Boston, MA
   * 02110-1301 USA
   *
   */
  
  #include <linux/gpio.h>
  #include <linux/spi/spi.h>
  #include <linux/spi/ads7846.h>
  
  #include <plat/mcspi.h>

  #include <plat/nand.h>

  
  #include "common-board-devices.h"

  #if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
  	defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)

  static struct omap2_mcspi_device_config ads7846_mcspi_config = {
  	.turbo_mode	= 0,
  	.single_channel	= 1,	/* 0: slave, 1: master */
  };
  
  static struct ads7846_platform_data ads7846_config = {
  	.x_max			= 0x0fff,
  	.y_max			= 0x0fff,
  	.x_plate_ohms		= 180,
  	.pressure_max		= 255,
  	.debounce_max		= 10,
  	.debounce_tol		= 3,
  	.debounce_rep		= 1,
  	.gpio_pendown		= -EINVAL,
  	.keep_vref_on		= 1,
  };
  
  static struct spi_board_info ads7846_spi_board_info __initdata = {
  	.modalias		= "ads7846",
  	.bus_num		= -EINVAL,
  	.chip_select		= 0,
  	.max_speed_hz		= 1500000,
  	.controller_data	= &ads7846_mcspi_config,
  	.irq			= -EINVAL,
  	.platform_data		= &ads7846_config,
  };
  
  void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
  			      struct ads7846_platform_data *board_pdata)
  {
  	struct spi_board_info *spi_bi = &ads7846_spi_board_info;
  	int err;

  	if (board_pdata && board_pdata->get_pendown_state) {
  		err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
  		if (err) {
  			pr_err("Couldn't obtain gpio for TSPenDown: %d
  ", err);
  			return;
  		}
  		gpio_export(gpio_pendown, 0);
  
  		if (gpio_debounce)
  			gpio_set_debounce(gpio_pendown, gpio_debounce);

  	}

  	ads7846_config.gpio_pendown = gpio_pendown;
  
  	spi_bi->bus_num	= bus_num;
  	spi_bi->irq	= OMAP_GPIO_IRQ(gpio_pendown);
  
  	if (board_pdata)
  		spi_bi->platform_data = board_pdata;
  
  	spi_register_board_info(&ads7846_spi_board_info, 1);
  }

  #else
  void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
  			      struct ads7846_platform_data *board_pdata)
  {
  }
  #endif
  
  #if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)

  static struct omap_nand_platform_data nand_data;

  
  void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
  				 int nr_parts)
  {
  	u8 cs = 0;
  	u8 nandcs = GPMC_CS_NUM + 1;
  
  	/* find out the chip-select on which NAND exists */
  	while (cs < GPMC_CS_NUM) {
  		u32 ret = 0;
  		ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
  
  		if ((ret & 0xC00) == 0x800) {
  			printk(KERN_INFO "Found NAND on CS%d
  ", cs);
  			if (nandcs > GPMC_CS_NUM)
  				nandcs = cs;
  		}
  		cs++;
  	}
  
  	if (nandcs > GPMC_CS_NUM) {
  		printk(KERN_INFO "NAND: Unable to find configuration "
  				 "in GPMC
   ");
  		return;
  	}
  
  	if (nandcs < GPMC_CS_NUM) {
  		nand_data.cs = nandcs;
  		nand_data.parts = parts;
  		nand_data.nr_parts = nr_parts;

  		nand_data.devsize = options;

  
  		printk(KERN_INFO "Registering NAND on CS%d
  ", nandcs);
  		if (gpmc_nand_init(&nand_data) < 0)
  			printk(KERN_ERR "Unable to register NAND device
  ");
  	}
  }
  #else
  void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
  				 int nr_parts)
  {
  }
  #endif