linux-imx

/*

 *  linux/drivers/pinctrl/pinmux-xway.c

 *  based on linux/drivers/pinctrl/pinmux-pxa910.c

 *

 *  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

 *  publishhed by the Free Software Foundation.

 *

 *  Copyright (C) 2012 John Crispin <john@phrozen.org>

 *  Copyright (C) 2015 Martin Schiller <mschiller@tdt.de>

 */

​

#include <linux/err.h>

#include <linux/slab.h>

#include <linux/module.h>

#include <linux/of_platform.h>

#include <linux/of_address.h>

#include <linux/of_gpio.h>

#include <linux/ioport.h>

#include <linux/io.h>

#include <linux/device.h>

#include <linux/platform_device.h>

​

#include "pinctrl-lantiq.h"

​

#include <lantiq_soc.h>

​

/* we have up to 4 banks of 16 bit each */

#define PINS            16

#define PORT3           3

#define PORT(x)         (x / PINS)

#define PORT_PIN(x)     (x % PINS)

​

/* we have 2 mux bits that can be set for each pin */

#define MUX_ALT0    0x1

#define MUX_ALT1    0x2

​

/*

 * each bank has this offset apart from the 4th bank that is mixed into the

 * other 3 ranges

 */

#define REG_OFF         0x30

​

/* these are the offsets to our registers */

#define GPIO_BASE(p)        (REG_OFF * PORT(p))

#define GPIO_OUT(p)     GPIO_BASE(p)

#define GPIO_IN(p)      (GPIO_BASE(p) + 0x04)

#define GPIO_DIR(p)     (GPIO_BASE(p) + 0x08)

#define GPIO_ALT0(p)        (GPIO_BASE(p) + 0x0C)

#define GPIO_ALT1(p)        (GPIO_BASE(p) + 0x10)

#define GPIO_OD(p)      (GPIO_BASE(p) + 0x14)

#define GPIO_PUDSEL(p)      (GPIO_BASE(p) + 0x1c)

#define GPIO_PUDEN(p)       (GPIO_BASE(p) + 0x20)

​

/* the 4th port needs special offsets for some registers */

#define GPIO3_OD        (GPIO_BASE(0) + 0x24)

#define GPIO3_PUDSEL        (GPIO_BASE(0) + 0x28)

#define GPIO3_PUDEN     (GPIO_BASE(0) + 0x2C)

#define GPIO3_ALT1      (GPIO_BASE(PINS) + 0x24)

​

/* macros to help us access the registers */

#define gpio_getbit(m, r, p)    (!!(ltq_r32(m + r) & BIT(p)))

#define gpio_setbit(m, r, p)    ltq_w32_mask(0, BIT(p), m + r)