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	.single_channel	= 1,	/* 0: slave, 1: master */
 37};
 38
 39static struct ads7846_platform_data ads7846_config = {
 40	.x_max			= 0x0fff,
 41	.y_max			= 0x0fff,
 42	.x_plate_ohms		= 180,
 43	.pressure_max		= 255,
 44	.debounce_max		= 10,
 45	.debounce_tol		= 3,
 46	.debounce_rep		= 1,
 47	.gpio_pendown		= -EINVAL,
 48	.keep_vref_on		= 1,
 49};
 50
 51static struct spi_board_info ads7846_spi_board_info __initdata = {
 52	.modalias		= "ads7846",
 53	.bus_num		= -EINVAL,
 54	.chip_select		= 0,
 55	.max_speed_hz		= 1500000,
 56	.controller_data	= &ads7846_mcspi_config,
 57	.irq			= -EINVAL,
 58	.platform_data		= &ads7846_config,
 59};
 60
 61void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 62			      struct ads7846_platform_data *board_pdata)
 63{
 64	struct spi_board_info *spi_bi = &ads7846_spi_board_info;
 65	int err;
 66
 67	if (board_pdata && board_pdata->get_pendown_state) {
 68		err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
 69		if (err) {
 70			pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
 71			return;
 72		}
 73		gpio_export(gpio_pendown, 0);
 74
 75		if (gpio_debounce)
 76			gpio_set_debounce(gpio_pendown, gpio_debounce);
 77	}
 78
 79	ads7846_config.gpio_pendown = gpio_pendown;
 80
 81	spi_bi->bus_num	= bus_num;
 82	spi_bi->irq	= OMAP_GPIO_IRQ(gpio_pendown);
 83
 84	if (board_pdata)
 85		spi_bi->platform_data = board_pdata;
 86
 87	spi_register_board_info(&ads7846_spi_board_info, 1);
 88}
 89#else
 90void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
 91			      struct ads7846_platform_data *board_pdata)
 92{
 93}
 94#endif
 95
 96#if defined(CONFIG_MTD_NAND_OMAP2) || defined(CONFIG_MTD_NAND_OMAP2_MODULE)
 97static struct omap_nand_platform_data nand_data;
 98
 99void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
100				 int nr_parts)
101{
102	u8 cs = 0;
103	u8 nandcs = GPMC_CS_NUM + 1;
104
105	/* find out the chip-select on which NAND exists */
106	while (cs < GPMC_CS_NUM) {
107		u32 ret = 0;
108		ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
109
110		if ((ret & 0xC00) == 0x800) {
111			printk(KERN_INFO "Found NAND on CS%d\n", cs);
112			if (nandcs > GPMC_CS_NUM)
113				nandcs = cs;
114		}
115		cs++;
116	}
117
118	if (nandcs > GPMC_CS_NUM) {
119		printk(KERN_INFO "NAND: Unable to find configuration "
120				 "in GPMC\n ");
121		return;
122	}
123
124	if (nandcs < GPMC_CS_NUM) {
125		nand_data.cs = nandcs;
126		nand_data.parts = parts;
127		nand_data.nr_parts = nr_parts;
128		nand_data.devsize = options;
129
130		printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
131		if (gpmc_nand_init(&nand_data) < 0)
132			printk(KERN_ERR "Unable to register NAND device\n");
133	}
134}
135#else
136void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
137				 int nr_parts)
138{
139}
140#endif