[deliverable/linux.git] / arch / arm / mach-omap2 / common-board-devices.c

/*
 * 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,
};

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;

	err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
	if (err) {
		pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
		return;
	}

	if (gpio_debounce)
		gpio_set_debounce(gpio_pendown, gpio_debounce);

	spi_bi->bus_num	= bus_num;
	spi_bi->irq	= gpio_to_irq(gpio_pendown);

	if (board_pdata) {
		board_pdata->gpio_pendown = gpio_pendown;
		spi_bi->platform_data = board_pdata;
		if (board_pdata->get_pendown_state)
			gpio_export(gpio_pendown, 0);
	} else {
		ads7846_config.gpio_pendown = gpio_pendown;
	}

	if (!board_pdata || (board_pdata && !board_pdata->get_pendown_state))
		gpio_free(gpio_pendown);

	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\n", cs);
			if (nandcs > GPMC_CS_NUM)
				nandcs = cs;
		}
		cs++;
	}

	if (nandcs > GPMC_CS_NUM) {
		printk(KERN_INFO "NAND: Unable to find configuration "
				 "in GPMC\n ");
		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\n", nandcs);
		if (gpmc_nand_init(&nand_data) < 0)
			printk(KERN_ERR "Unable to register NAND device\n");
	}
}
#else
void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
				 int nr_parts)
{
}
#endif
Commit	Line	Data
96974a24 MR	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>
9a3f39ff	28	#include <plat/nand.h>
96974a24 MR	29
	30	#include "common-board-devices.h"
	31
9a3f39ff MR	32	#if defined(CONFIG_TOUCHSCREEN_ADS7846) \|\| \
9a3f39ff MR	33	defined(CONFIG_TOUCHSCREEN_ADS7846_MODULE)
96974a24 MR	34	static struct omap2_mcspi_device_config ads7846_mcspi_config = {
96974a24 MR	35	.turbo_mode = 0,
96974a24 MR	36	};
	37
	38	static 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
	50	static 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
	60	void __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
97ee9f01 IG	66	err = gpio_request_one(gpio_pendown, GPIOF_IN, "TSPenDown");
	67	if (err) {
	68	pr_err("Couldn't obtain gpio for TSPenDown: %d\n", err);
	69	return;
96974a24 MR	70	}
96974a24 MR	71
97ee9f01 IG	72	if (gpio_debounce)
	73	gpio_set_debounce(gpio_pendown, gpio_debounce);
	74
96974a24	75	spi_bi->bus_num = bus_num;
46a0a540	76	spi_bi->irq = gpio_to_irq(gpio_pendown);
96974a24	77
7db74d5e IY	78	if (board_pdata) {
7db74d5e IY	79	board_pdata->gpio_pendown = gpio_pendown;
96974a24	80	spi_bi->platform_data = board_pdata;
97ee9f01 IG	81	if (board_pdata->get_pendown_state)
97ee9f01 IG	82	gpio_export(gpio_pendown, 0);
7db74d5e IY	83	} else {
	84	ads7846_config.gpio_pendown = gpio_pendown;
	85	}
96974a24	86
97ee9f01 IG	87	if (!board_pdata \|\| (board_pdata && !board_pdata->get_pendown_state))
	88	gpio_free(gpio_pendown);
	89
96974a24 MR	90	spi_register_board_info(&ads7846_spi_board_info, 1);
96974a24 MR	91	}
9a3f39ff MR	92	#else
	93	void __init omap_ads7846_init(int bus_num, int gpio_pendown, int gpio_debounce,
	94	struct ads7846_platform_data *board_pdata)
	95	{
	96	}
	97	#endif
	98
	99	#if defined(CONFIG_MTD_NAND_OMAP2) \|\| defined(CONFIG_MTD_NAND_OMAP2_MODULE)
7a559c78	100	static struct omap_nand_platform_data nand_data;
9a3f39ff MR	101
	102	void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
	103	int nr_parts)
	104	{
	105	u8 cs = 0;
	106	u8 nandcs = GPMC_CS_NUM + 1;
	107
	108	/* find out the chip-select on which NAND exists */
	109	while (cs < GPMC_CS_NUM) {
	110	u32 ret = 0;
	111	ret = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
	112
	113	if ((ret & 0xC00) == 0x800) {
	114	printk(KERN_INFO "Found NAND on CS%d\n", cs);
	115	if (nandcs > GPMC_CS_NUM)
	116	nandcs = cs;
	117	}
	118	cs++;
	119	}
	120
	121	if (nandcs > GPMC_CS_NUM) {
	122	printk(KERN_INFO "NAND: Unable to find configuration "
	123	"in GPMC\n ");
	124	return;
	125	}
	126
	127	if (nandcs < GPMC_CS_NUM) {
	128	nand_data.cs = nandcs;
	129	nand_data.parts = parts;
	130	nand_data.nr_parts = nr_parts;
7a559c78	131	nand_data.devsize = options;
9a3f39ff MR	132
	133	printk(KERN_INFO "Registering NAND on CS%d\n", nandcs);
	134	if (gpmc_nand_init(&nand_data) < 0)
	135	printk(KERN_ERR "Unable to register NAND device\n");
	136	}
	137	}
	138	#else
	139	void __init omap_nand_flash_init(int options, struct mtd_partition *parts,
	140	int nr_parts)
	141	{
	142	}
	143	#endif