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/*
* (C) Copyright 2010 Juergen Beisert - Pengutronix
*
* 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.
*
*/
#ifndef __ASM_MACH_IOMUX_H
#define __ASM_MACH_IOMUX_H
#include <types.h>
/*
* The muxable pins on i.MX23 are organized in 4 banks. On i.MX28 there are 7
* banks. Each bank has up to 32 pins each. Furthermore for each pin some of the
* following properties can be configured:
* - drive strength: 4 mA, 8 mA, 12 mA or 16 mA
* - pull up enabled or bit keeper enabled (a pin cannot have both)
* - voltage: 1.8 V, 2.5 V (i.MX23 only) or 3.3 V (i.MX28 only)
* - function: 0..3, with 3 being the GPIO functionality
*
* So a configuration for a given pin can be described in an unsigned integer of
* length 32:
* - [ 4: 0] bank pin
* - [ 7: 5] bank
* - [ 8] 1 iff pin has a switchable pull up
* - [ 9] 1 iff pin has a switchable bit keeper
* - [ 10] 1 iff pin has switchable drive strength
* - [ 11] 1 iff pin has switchable voltage
* - [13:12] function
* - [ 14] 1 for enabled pull up
* - [ 15] 1 iff [14] is a valid pull up value
* - [ 16] 1 for enabled bit keeper
* - [ 17] 1 iff [16] is a valid bit keeper value
* - [19:18] value for drive strength i -> i * 4 mA
* - [ 20] 1 iff [19:18] is valid
* - [ 21] 0 for 1.8 V, 1 for 2.5 V resp. 3.3 V
* - [ 22] 1 iff [21] is valid
* - [ 23] 1 iff configure as GPIO out if function == 3 (i.e. GPIO)
* - [ 24] initial value iff configured as GPIO out
* - [ 25] error
*/
#define BANKPIN(p) (((p) & 31) | ERROR((p) & ~31))
#define BANK(b) ((((b) & 7) << 5) | (ERROR((b) & ~7)))
#define PE (1 << 8)
#define BK (1 << 9)
#define SE (1 << 10)
#define VE (1 << 11)
#define FUNC(f) ((((f) & 3) << 12) | (ERROR((f) & ~3)))
#define PULLUP(p) ((((p) & 1) << 14) | PEVALID | ERROR((p) & ~1))
#define PEVALID (1 << 15)
#define BITKEEPER(b) ((((b) & 1) << 16) | BKVALID | ERROR((b) & ~1))
#define BKVALID (1 << 17)
#define STRENGTH(s) ((((s) & 3) << 18) | SEVALID | ERROR((s) & ~3))
#define S4MA 0
#define S8MA 1
#define S12MA 2
#define S16MA 3
#define SEVALID (1 << 20)
#define VOLTAGE(v) ((((v) & 1) << 21) | VEVALID | ERROR((v) & ~1))
#define VE_1_8V VOLTAGE(0)
#define VEVALID (1 << 22)
#define GPIO_OUT (1 << 23)
#define GPIO_IN (0 << 23)
#define GPIO_VALUE(v) ((((v) & 1) << 24) | ERROR((v) & ~1))
#define ERROR(x) (!!(x) << 25)
#define GET_GPIO_NO(m) ((m) & 0xff)
#define GET_FUNC(m) (((m) >> 12) & 3)
#define PE_PRESENT(m) ((m) & PE)
#define GET_PULLUP(m) (((m) >> 14) & 1)
#define BK_PRESENT(m) ((m) & BK)
#define GET_BITKEEPER(m)(((m) >> 16) & 1)
#define SE_PRESENT(m) ((m) & SE)
#define GET_STRENGTH(m) (((m) >> 18) & 3)
#define VE_PRESENT(m) ((m) & VE)
#define GET_VOLTAGE(m) (((m) >> 21) & 1)
#define GET_GPIODIR(m) (!!((m) & GPIO_OUT))
#define GET_GPIOVAL(m) (!!((m) & GPIO_VALUE(1)))
#define IS_GPIO 3
#if defined CONFIG_ARCH_IMX23
/*
* The pin definition of i.MX23 are strange. Bank 0's pins 0 .. 15 are defined
* using PORTF(0, 0) .. PORTF(0, 15). Its pins 16 .. 31 however use PORTF(1, 0)
* .. PORTF(1, 15). So the PORTF macro is more ugly than necessary.
*/
# define PORTF(bank,bit) (BANK((bank) / 2) | BANKPIN((((bank) & 1) << 4) | (bit)) | ERROR((bit) & ~15) | ERROR((bank) & ~7))
# define VE_2_5V VOLTAGE(0)
# include <mach/iomux-imx23.h>
#endif
#if defined CONFIG_ARCH_IMX28
# define PORTF(bank,bit) (BANK(bank) | BANKPIN(bit))
# define VE_3_3V VOLTAGE(1)
# include <mach/iomux-imx28.h>
#endif
void imx_gpio_mode(uint32_t);
#endif /* __ASM_MACH_IOMUX_H */
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