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/*
* Copyright (C) 2009-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*
* 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/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/bitops.h>
#include <linux/gpio.h>
#include <linux/irq.h>
#include <mach/pinctrl.h>
static struct pinctrl_chip *g_chip;
int mxs_request_pin(unsigned int pin, enum pin_fun fun, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
if (test_and_set_bit(index, &pb->bitmap))
return -EBUSY;
pb->label[index] = lab;
if (g_chip->set_type)
g_chip->set_type(pb, index, fun);
return 0;
}
EXPORT_SYMBOL(mxs_request_pin);
int mxs_set_type(unsigned int pin, enum pin_fun fun, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
if (!test_bit(index, &pb->bitmap))
return -ENOLCK;
if (lab != pb->label[index]) /* label is const string */
return -EINVAL;
if (g_chip->set_type)
g_chip->set_type(pb, index, fun);
return 0;
}
EXPORT_SYMBOL(mxs_set_type);
int mxs_set_strength(unsigned int pin, enum pad_strength cfg, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
if (!test_bit(index, &pb->bitmap))
return -ENOLCK;
if (lab != pb->label[index]) /* label is const string */
return -EINVAL;
if (g_chip->set_strength)
g_chip->set_strength(pb, index, cfg);
return 0;
}
EXPORT_SYMBOL(mxs_set_strength);
int mxs_set_voltage(unsigned int pin, enum pad_voltage cfg, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
if (!test_bit(index, &pb->bitmap))
return -ENOLCK;
if (lab != pb->label[index]) /* label is const string */
return -EINVAL;
if (g_chip->set_voltage)
g_chip->set_voltage(pb, index, cfg);
return 0;
}
EXPORT_SYMBOL(mxs_set_voltage);
int mxs_set_pullup(unsigned int pin, int en, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
if (!test_bit(index, &pb->bitmap))
return -ENOLCK;
if (lab != pb->label[index]) /* label is const string */
return -EINVAL;
if (g_chip->set_pullup)
g_chip->set_pullup(pb, index, en);
return 0;
}
EXPORT_SYMBOL(mxs_set_pullup);
void mxs_release_pin(unsigned int pin, const char *lab)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return;
pb = g_chip->banks + bank;
if (!test_bit(index, &pb->bitmap))
return;
if (lab != pb->label[index]) /* label is const string */
return;
pb->label[index] = NULL;
clear_bit(index, &pb->bitmap);
}
EXPORT_SYMBOL(mxs_release_pin);
unsigned int mxs_pin2gpio(unsigned int pin)
{
int bank, index;
struct pin_bank *pb;
if (g_chip == NULL)
return -ENODEV;
if (!g_chip->get_gpio)
return -ENODEV;
bank = g_chip->pin2id(g_chip, pin, &index);
if (bank < 0 || index < 0 || bank >= g_chip->bank_size)
return -EFAULT;
pb = g_chip->banks + bank;
return g_chip->get_gpio(pb, index);
}
int __init mxs_set_pinctrl_chip(struct pinctrl_chip *chip)
{
if (!(chip && chip->banks && chip->bank_size &&
chip->get_gpio && chip->pin2id))
return -EINVAL;
if (g_chip)
return -EEXIST;
g_chip = chip;
return 0;
};
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