1248911Sian/*- 2248911Sian * Copyright (C) 2006 M. Warner Losh. All rights reserved. 3248911Sian * Copyright (C) 2012 Ian Lepore. All rights reserved. 4248911Sian * 5248911Sian * Redistribution and use in source and binary forms, with or without 6248911Sian * modification, are permitted provided that the following conditions 7248911Sian * are met: 8248911Sian * 1. Redistributions of source code must retain the above copyright 9248911Sian * notice, this list of conditions and the following disclaimer. 10248911Sian * 2. Redistributions in binary form must reproduce the above copyright 11248911Sian * notice, this list of conditions and the following disclaimer in the 12248911Sian * documentation and/or other materials provided with the distribution. 13248911Sian * 14248911Sian * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15248911Sian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16248911Sian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17248911Sian * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 18248911Sian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19248911Sian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20248911Sian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21248911Sian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22248911Sian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23248911Sian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24248911Sian * SUCH DAMAGE. 25248911Sian * 26248911Sian * $FreeBSD$ 27248911Sian */ 28248911Sian 29248911Sian#ifndef _ARM_AT91_GPIO_H 30248911Sian#define _ARM_AT91_GPIO_H 31248911Sian 32248911Sian#ifndef _KERNEL 33248911Sian#include <sys/types.h> 34248911Sian#endif 35248911Sian#include <sys/ioccom.h> 36248911Sian 37248911Sian/* Userland GPIO API for Atmel AT91 series SOC. 38248911Sian * 39248911Sian * Open /dev/pioN (where N is 0 for PIOA, 1 for PIOB, etc), and use ioctl(2) 40248911Sian * calls to configure the pin(s) as needed. 41248911Sian * 42248911Sian * The userland interrupt support allows you to use read(2) and/or select(2) to 43248911Sian * get notified of interrupts on PIO pins for which you enabled interrupt 44248911Sian * notifications. Each time an interrupt occurs on a given pin, that pin number 45248911Sian * is written into a buffer as a uint8_t. Thus, reading from /dev/pioN delivers 46248911Sian * info on which interrupt(s) have occurred since the last read. You can also 47248911Sian * use select() to block until an interrupt occurs (you still need to read() to 48248911Sian * consume the interrupt number bytes from the buffer.) 49248911Sian */ 50248911Sian 51248911Sianstruct at91_gpio_info 52248911Sian{ 53248911Sian uint32_t output_status; /* Current state of output pins */ 54248911Sian uint32_t input_status; /* 1->out 0->in bitmask */ 55248911Sian uint32_t highz_status; /* 1->highz 0->driven bitmask */ 56248911Sian uint32_t pullup_status; /* 1->floating 0->pullup engaged */ 57248911Sian uint32_t glitch_status; /* 0-> no glitch filter 1->gf */ 58248911Sian uint32_t enabled_status; /* 1->used for pio 0->other */ 59248911Sian uint32_t periph_status; /* 0->A periph 1->B periph */ 60248911Sian uint32_t intr_status; /* 1-> ISR enabled, 0->disabled */ 61248911Sian uint32_t extra_status[8];/* Extra status info, device depend */ 62248911Sian}; 63248911Sian 64248911Sianstruct at91_gpio_cfg 65248911Sian{ 66248911Sian uint32_t cfgmask; /* which things change */ 67248911Sian#define AT91_GPIO_CFG_INPUT 0x01 /* configure input/output pins */ 68248911Sian#define AT91_GPIO_CFG_HI_Z 0x02 /* HiZ */ 69248911Sian#define AT91_GPIO_CFG_PULLUP 0x04 /* Enable/disable pullup resistors */ 70248911Sian#define AT91_GPIO_CFG_GLITCH 0x08 /* Glitch filtering */ 71248911Sian#define AT91_GPIO_CFG_GPIO 0x10 /* Use pin for PIO or peripheral */ 72248911Sian#define AT91_GPIO_CFG_PERIPH 0x20 /* Select which peripheral to use */ 73248911Sian#define AT91_GPIO_CFG_INTR 0x40 /* Select pin for interrupts */ 74248911Sian uint32_t iomask; /* Mask of bits to change */ 75248911Sian uint32_t input; /* or output */ 76248911Sian uint32_t hi_z; /* Disable output */ 77248911Sian uint32_t pullup; /* Enable pullup resistor */ 78248911Sian uint32_t glitch; /* Glitch filtering */ 79248911Sian uint32_t gpio; /* Enabled for PIO (1) or periph (0) */ 80248911Sian uint32_t periph; /* Select periph A (0) or periph B (1) */ 81248911Sian uint32_t intr; /* Enable interrupt (1), or not (0) */ 82248911Sian}; 83248911Sian 84248911Sianstruct at91_gpio_bang 85248911Sian{ 86248911Sian uint32_t clockpin; /* clock pin MASK */ 87248911Sian uint32_t datapin; /* Data pin MASK */ 88248911Sian uint32_t bits; /* bits to clock out (all 32) */ 89248911Sian}; 90248911Sian 91248911Sianstruct at91_gpio_bang_many 92248911Sian{ 93248911Sian uint32_t clockpin; /* clock pin MASK */ 94248911Sian uint32_t datapin; /* Data pin MASK */ 95248911Sian void *bits; /* bits to clock out */ 96248911Sian uint32_t numbits; /* Number of bits to clock out */ 97248911Sian}; 98248911Sian 99248911Sian#define AT91_GPIO_SET _IOW('g', 0, uint32_t) /* Turn bits on */ 100248911Sian#define AT91_GPIO_CLR _IOW('g', 1, uint32_t) /* Turn bits off */ 101248911Sian#define AT91_GPIO_READ _IOR('g', 2, uint32_t) /* Read input bit state */ 102248911Sian#define AT91_GPIO_INFO _IOR('g', 3, struct at91_gpio_info) /* State of pio cfg */ 103248911Sian#define AT91_GPIO_CFG _IOW('g', 4, struct at91_gpio_cfg) /* Configure pio */ 104248911Sian#define AT91_GPIO_BANG _IOW('g', 5, struct at91_gpio_bang) /* bit bang 32 bits */ 105248911Sian#define AT91_GPIO_BANG_MANY _IOW('g', 6, struct at91_gpio_bang_many)/* bit bang >32 bits */ 106248911Sian 107248911Sian#endif /* _ARM_AT91_GPIO_H */ 108248911Sian 109