1/* SPDX-License-Identifier: GPL-2.0-only */ 2#ifndef _I8042_IO_H 3#define _I8042_IO_H 4 5 6/* 7 * Names. 8 */ 9 10#define I8042_KBD_PHYS_DESC "isa0060/serio0" 11#define I8042_AUX_PHYS_DESC "isa0060/serio1" 12#define I8042_MUX_PHYS_DESC "isa0060/serio%d" 13 14/* 15 * IRQs. 16 */ 17 18#if defined(__arm__) 19/* defined in include/asm-arm/arch-xxx/irqs.h */ 20#include <asm/irq.h> 21#elif defined(CONFIG_PPC) 22extern int of_i8042_kbd_irq; 23extern int of_i8042_aux_irq; 24# define I8042_KBD_IRQ of_i8042_kbd_irq 25# define I8042_AUX_IRQ of_i8042_aux_irq 26#else 27# define I8042_KBD_IRQ 1 28# define I8042_AUX_IRQ 12 29#endif 30 31 32/* 33 * Register numbers. 34 */ 35 36#define I8042_COMMAND_REG 0x64 37#define I8042_STATUS_REG 0x64 38#define I8042_DATA_REG 0x60 39 40static inline int i8042_read_data(void) 41{ 42 return inb(I8042_DATA_REG); 43} 44 45static inline int i8042_read_status(void) 46{ 47 return inb(I8042_STATUS_REG); 48} 49 50static inline void i8042_write_data(int val) 51{ 52 outb(val, I8042_DATA_REG); 53} 54 55static inline void i8042_write_command(int val) 56{ 57 outb(val, I8042_COMMAND_REG); 58} 59 60static inline int i8042_platform_init(void) 61{ 62/* 63 * On some platforms touching the i8042 data register region can do really 64 * bad things. Because of this the region is always reserved on such boxes. 65 */ 66#if defined(CONFIG_PPC) 67 if (check_legacy_ioport(I8042_DATA_REG)) 68 return -ENODEV; 69#endif 70#if !defined(__sh__) && !defined(__alpha__) 71 if (!request_region(I8042_DATA_REG, 16, "i8042")) 72 return -EBUSY; 73#endif 74 75 i8042_reset = I8042_RESET_ALWAYS; 76 return 0; 77} 78 79static inline void i8042_platform_exit(void) 80{ 81#if !defined(__sh__) && !defined(__alpha__) 82 release_region(I8042_DATA_REG, 16); 83#endif 84} 85 86#endif /* _I8042_IO_H */ 87