1#ifndef _I8042_IO_H 2#define _I8042_IO_H 3 4/* 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 as published by 7 * the Free Software Foundation. 8 */ 9 10/* 11 * Names. 12 */ 13 14#define I8042_KBD_PHYS_DESC "isa0060/serio0" 15#define I8042_AUX_PHYS_DESC "isa0060/serio1" 16#define I8042_MUX_PHYS_DESC "isa0060/serio%d" 17 18/* 19 * IRQs. 20 */ 21 22#ifdef __alpha__ 23# define I8042_KBD_IRQ 1 24# define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ 25#elif defined(__arm__) 26/* defined in include/asm-arm/arch-xxx/irqs.h */ 27#include <asm/irq.h> 28#elif defined(CONFIG_SH_CAYMAN) 29#include <asm/irq.h> 30#elif defined(CONFIG_PPC) 31extern int of_i8042_kbd_irq; 32extern int of_i8042_aux_irq; 33# define I8042_KBD_IRQ of_i8042_kbd_irq 34# define I8042_AUX_IRQ of_i8042_aux_irq 35#else 36# define I8042_KBD_IRQ 1 37# define I8042_AUX_IRQ 12 38#endif 39 40 41/* 42 * Register numbers. 43 */ 44 45#define I8042_COMMAND_REG 0x64 46#define I8042_STATUS_REG 0x64 47#define I8042_DATA_REG 0x60 48 49static inline int i8042_read_data(void) 50{ 51 return inb(I8042_DATA_REG); 52} 53 54static inline int i8042_read_status(void) 55{ 56 return inb(I8042_STATUS_REG); 57} 58 59static inline void i8042_write_data(int val) 60{ 61 outb(val, I8042_DATA_REG); 62} 63 64static inline void i8042_write_command(int val) 65{ 66 outb(val, I8042_COMMAND_REG); 67} 68 69static inline int i8042_platform_init(void) 70{ 71/* 72 * On some platforms touching the i8042 data register region can do really 73 * bad things. Because of this the region is always reserved on such boxes. 74 */ 75#if defined(CONFIG_PPC) 76 if (check_legacy_ioport(I8042_DATA_REG)) 77 return -ENODEV; 78#endif 79#if !defined(__sh__) && !defined(__alpha__) 80 if (!request_region(I8042_DATA_REG, 16, "i8042")) 81 return -EBUSY; 82#endif 83 84 i8042_reset = 1; 85 return 0; 86} 87 88static inline void i8042_platform_exit(void) 89{ 90#if !defined(__sh__) && !defined(__alpha__) 91 release_region(I8042_DATA_REG, 16); 92#endif 93} 94 95#endif /* _I8042_IO_H */ 96