1/*
  2 * common-board-devices.c
  3 *
  4 * Copyright (C) 2011 CompuLab, Ltd.
  5 * Author: Mike Rapoport <mike@compulab.co.il>
  6 *
  7 * This program is free software; you can redistribute it and/or
  8 * modify it under the terms of the GNU General Public License
  9 * version 2 as published by the Free Software Foundation.
 10 *
 11 * This program is distributed in the hope that it will be useful, but
 12 * WITHOUT ANY WARRANTY; without even the implied warranty of
 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 14 * General Public License for more details.
 15 *
 16 * You should have received a copy of the GNU General Public License
 17 * along with this program; if not, write to the Free Software
 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 19 * 02110-1301 USA
 20 *
 21 */
 22
 23#include <linux/gpio.h>
 24#include <linux/spi/spi.h>
 25#include <linux/spi/ads7846.h>
 26
 27#include <plat/mcspi.h>
 28#include <plat/nand.h>
 29
 30#include "common-board-devices.h"
 31
 32#if defined(CONFIG_TOUCHSCREEN_ADS7846) || \
 33	defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
 34static struct omap2_mcspi_device_config ads7846_mcspi_config = {
 35	.turbo_mode	= 0,
 36};
 37
 38static struct ads7846_platform_data ads7846_config = {
 39	.x_max			= 0x0fff,
 40	.y_max			= 0x0fff,
 41	.x_plate_ohms		= 180,
 42	.pressure_max		= 255,
 43	.debounce_max		= 10,
 44	.debounce_tol		= 3,
 45	.debounce_rep		= 1,
 46	.gpio_pendown		= -EINVAL,
 47	.keep_vref_on		= 1,
 48};
 49
 50static struct spi_board_info ads7846_spi_board_info __initdata = {
 51	.modalias		= "ads7846",
 52	.bus_num		= -EINVAL,
 53	.chip_select		= 0,
 54	.max_speed_hz		= 1500000,
 55	.controller_data	= &ads7846_mcspi_config,
 56	.irq			= -EINVAL,
 57	.platform_data		= &ads7846_config,
 58};
 59
 60void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 61			      struct ads7846_platform_data *board_pdata)
 62{
 63	struct spi_board_info *spi_bi = &ads7846_spi_board_info;
 64	int err;
 65
 66	if (board_pdata && board_pdata->get_pendown_state) {
 67		err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
 68		if (err) {
 69			pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
 70			return;
 71		}
 72		gpio_export(gpio_pendown, 0);
 73
 74		if (gpio_debounce)
 75			gpio_set_debounce(gpio_pendown, gpio_debounce);
 76	}
 77
 78	spi_bi->bus_num	= bus_num;
 79	spi_bi->irq	= gpio_to_irq(gpio_pendown);
 80
 81	if (board_pdata) {
 82		board_pdata->gpio_pendown = gpio_pendown;
 83		spi_bi->platform_data = board_pdata;
 84	} else {
 85		ads7846_config.gpio_pendown = gpio_pendown;
 86	}
 87
 88	spi_register_board_info(&ads7846_spi_board_info, 1);
 89}
 90#else
 91void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 92			      struct ads7846_platform_data *board_pdata)
 93{
 94}
 95#endif
 96
 97#if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
 98static struct omap_nand_platform_data nand_data;
 99
100void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
101				 int nr_parts)
102{
103	u8 cs = 0;
104	u8 nandcs = GPMC_CS_NUM + 1;
105
106	/* find out the chip-select on which NAND exists */
107	while (cs < GPMC_CS_NUM) {
108		u32 ret = 0;
109		ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
110
111		if ((ret & 0xC00) == 0x800) {
112			printk(KERN_INFO "Found NAND on CS%d\n", cs);
113			if (nandcs > GPMC_CS_NUM)
114				nandcs = cs;
115		}
116		cs++;
117	}
118
119	if (nandcs > GPMC_CS_NUM) {
120		printk(KERN_INFO "NAND: Unable to find configuration "
121				 "in GPMC\n ");
122		return;
123	}
124
125	if (nandcs < GPMC_CS_NUM) {
126		nand_data.cs = nandcs;
127		nand_data.parts = parts;
128		nand_data.nr_parts = nr_parts;
129		nand_data.devsize = options;
130
131		printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
132		if (gpmc_nand_init(&nand_data) < 0)
133			printk(KERN_ERR "Unable to register NAND device\n");
134	}
135}
136#else
137void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
138				 int nr_parts)
139{
140}
141#endif