1aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov/* 2aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * Basic memory-mapped GPIO controllers. 3aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * 4aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * Copyright 2008 MontaVista Software, Inc. 5aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * Copyright 2008,2010 Anton Vorontsov <cbouatmailru@gmail.com> 6aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * 7aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * This program is free software; you can redistribute it and/or modify it 8aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * under the terms of the GNU General Public License as published by the 9aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * Free Software Foundation; either version 2 of the License, or (at your 10aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov * option) any later version. 11aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov */ 12aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov 13aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov#ifndef __BASIC_MMIO_GPIO_H 14aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov#define __BASIC_MMIO_GPIO_H 15aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov 16280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles#include <linux/gpio.h> 17280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles#include <linux/types.h> 18280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles#include <linux/compiler.h> 19e5ea3f12d41d96edf4ad9374db2b1725e457acecJamie Iles#include <linux/spinlock_types.h> 20280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 21aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsovstruct bgpio_pdata { 22781f6d710d4482eab05cfaad50060a0ea8c0e4e0Pawel Moll const char *label; 23aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov int base; 24924e7a9fc6da124588e27c611841d07047c157b4Jamie Iles int ngpio; 25aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov}; 26aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov 27280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Ilesstruct device; 28280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 29280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Ilesstruct bgpio_chip { 30280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles struct gpio_chip gc; 31280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 32280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles unsigned long (*read_reg)(void __iomem *reg); 33280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles void (*write_reg)(void __iomem *reg, unsigned long data); 34280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 35280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles void __iomem *reg_dat; 36280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles void __iomem *reg_set; 37280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles void __iomem *reg_clr; 38280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles void __iomem *reg_dir; 39280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 40280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles /* Number of bits (GPIOs): <register width> * 8. */ 41280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles int bits; 42280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 43280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles /* 44280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles * Some GPIO controllers work with the big-endian bits notation, 45280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles * e.g. in a 8-bits register, GPIO7 is the least significant bit. 46280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles */ 47280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles unsigned long (*pin2mask)(struct bgpio_chip *bgc, unsigned int pin); 48280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 49280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles /* 50280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles * Used to lock bgpio_chip->data. Also, this is needed to keep 51280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles * shadowed and real data registers writes together. 52280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles */ 53280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles spinlock_t lock; 54280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 55280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles /* Shadowed data register to clear/set bits safely. */ 56280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles unsigned long data; 57280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 58280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles /* Shadowed direction registers to clear/set direction safely. */ 59280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles unsigned long dir; 60280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles}; 61280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 62280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Ilesstatic inline struct bgpio_chip *to_bgpio_chip(struct gpio_chip *gc) 63280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles{ 64280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles return container_of(gc, struct bgpio_chip, gc); 65280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles} 66280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 674f5b04800a224aadb6cffcbbc3d3fa26e2367c7fRussell Kingint bgpio_remove(struct bgpio_chip *bgc); 684f5b04800a224aadb6cffcbbc3d3fa26e2367c7fRussell Kingint bgpio_init(struct bgpio_chip *bgc, struct device *dev, 694f5b04800a224aadb6cffcbbc3d3fa26e2367c7fRussell King unsigned long sz, void __iomem *dat, void __iomem *set, 704f5b04800a224aadb6cffcbbc3d3fa26e2367c7fRussell King void __iomem *clr, void __iomem *dirout, void __iomem *dirin, 713e11f7b840b4671213c66817294ad7dd0b572756Shawn Guo unsigned long flags); 723e11f7b840b4671213c66817294ad7dd0b572756Shawn Guo 733e11f7b840b4671213c66817294ad7dd0b572756Shawn Guo#define BGPIOF_BIG_ENDIAN BIT(0) 743e11f7b840b4671213c66817294ad7dd0b572756Shawn Guo#define BGPIOF_UNREADABLE_REG_SET BIT(1) /* reg_set is unreadable */ 753e11f7b840b4671213c66817294ad7dd0b572756Shawn Guo#define BGPIOF_UNREADABLE_REG_DIR BIT(2) /* reg_dir is unreadable */ 762b78f1e1389aef263071b9edf41c0980b092e601Andreas Larsson#define BGPIOF_BIG_ENDIAN_BYTE_ORDER BIT(3) 77280df6b3c3ad777a91f1011cd98d50df891bfef8Jamie Iles 78aeec56e331c6d2750de02ef34b305338305ca690Anton Vorontsov#endif /* __BASIC_MMIO_GPIO_H */ 79