162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0-only */ 262306a36Sopenharmony_ci#ifndef _I8042_IO_H 362306a36Sopenharmony_ci#define _I8042_IO_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci 662306a36Sopenharmony_ci/* 762306a36Sopenharmony_ci * Names. 862306a36Sopenharmony_ci */ 962306a36Sopenharmony_ci 1062306a36Sopenharmony_ci#define I8042_KBD_PHYS_DESC "isa0060/serio0" 1162306a36Sopenharmony_ci#define I8042_AUX_PHYS_DESC "isa0060/serio1" 1262306a36Sopenharmony_ci#define I8042_MUX_PHYS_DESC "isa0060/serio%d" 1362306a36Sopenharmony_ci 1462306a36Sopenharmony_ci/* 1562306a36Sopenharmony_ci * IRQs. 1662306a36Sopenharmony_ci */ 1762306a36Sopenharmony_ci 1862306a36Sopenharmony_ci#ifdef __alpha__ 1962306a36Sopenharmony_ci# define I8042_KBD_IRQ 1 2062306a36Sopenharmony_ci# define I8042_AUX_IRQ (RTC_PORT(0) == 0x170 ? 9 : 12) /* Jensen is special */ 2162306a36Sopenharmony_ci#elif defined(__arm__) 2262306a36Sopenharmony_ci/* defined in include/asm-arm/arch-xxx/irqs.h */ 2362306a36Sopenharmony_ci#include <asm/irq.h> 2462306a36Sopenharmony_ci#elif defined(CONFIG_PPC) 2562306a36Sopenharmony_ciextern int of_i8042_kbd_irq; 2662306a36Sopenharmony_ciextern int of_i8042_aux_irq; 2762306a36Sopenharmony_ci# define I8042_KBD_IRQ of_i8042_kbd_irq 2862306a36Sopenharmony_ci# define I8042_AUX_IRQ of_i8042_aux_irq 2962306a36Sopenharmony_ci#else 3062306a36Sopenharmony_ci# define I8042_KBD_IRQ 1 3162306a36Sopenharmony_ci# define I8042_AUX_IRQ 12 3262306a36Sopenharmony_ci#endif 3362306a36Sopenharmony_ci 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ci/* 3662306a36Sopenharmony_ci * Register numbers. 3762306a36Sopenharmony_ci */ 3862306a36Sopenharmony_ci 3962306a36Sopenharmony_ci#define I8042_COMMAND_REG 0x64 4062306a36Sopenharmony_ci#define I8042_STATUS_REG 0x64 4162306a36Sopenharmony_ci#define I8042_DATA_REG 0x60 4262306a36Sopenharmony_ci 4362306a36Sopenharmony_cistatic inline int i8042_read_data(void) 4462306a36Sopenharmony_ci{ 4562306a36Sopenharmony_ci return inb(I8042_DATA_REG); 4662306a36Sopenharmony_ci} 4762306a36Sopenharmony_ci 4862306a36Sopenharmony_cistatic inline int i8042_read_status(void) 4962306a36Sopenharmony_ci{ 5062306a36Sopenharmony_ci return inb(I8042_STATUS_REG); 5162306a36Sopenharmony_ci} 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_cistatic inline void i8042_write_data(int val) 5462306a36Sopenharmony_ci{ 5562306a36Sopenharmony_ci outb(val, I8042_DATA_REG); 5662306a36Sopenharmony_ci} 5762306a36Sopenharmony_ci 5862306a36Sopenharmony_cistatic inline void i8042_write_command(int val) 5962306a36Sopenharmony_ci{ 6062306a36Sopenharmony_ci outb(val, I8042_COMMAND_REG); 6162306a36Sopenharmony_ci} 6262306a36Sopenharmony_ci 6362306a36Sopenharmony_cistatic inline int i8042_platform_init(void) 6462306a36Sopenharmony_ci{ 6562306a36Sopenharmony_ci/* 6662306a36Sopenharmony_ci * On some platforms touching the i8042 data register region can do really 6762306a36Sopenharmony_ci * bad things. Because of this the region is always reserved on such boxes. 6862306a36Sopenharmony_ci */ 6962306a36Sopenharmony_ci#if defined(CONFIG_PPC) 7062306a36Sopenharmony_ci if (check_legacy_ioport(I8042_DATA_REG)) 7162306a36Sopenharmony_ci return -ENODEV; 7262306a36Sopenharmony_ci#endif 7362306a36Sopenharmony_ci#if !defined(__sh__) && !defined(__alpha__) 7462306a36Sopenharmony_ci if (!request_region(I8042_DATA_REG, 16, "i8042")) 7562306a36Sopenharmony_ci return -EBUSY; 7662306a36Sopenharmony_ci#endif 7762306a36Sopenharmony_ci 7862306a36Sopenharmony_ci i8042_reset = I8042_RESET_ALWAYS; 7962306a36Sopenharmony_ci return 0; 8062306a36Sopenharmony_ci} 8162306a36Sopenharmony_ci 8262306a36Sopenharmony_cistatic inline void i8042_platform_exit(void) 8362306a36Sopenharmony_ci{ 8462306a36Sopenharmony_ci#if !defined(__sh__) && !defined(__alpha__) 8562306a36Sopenharmony_ci release_region(I8042_DATA_REG, 16); 8662306a36Sopenharmony_ci#endif 8762306a36Sopenharmony_ci} 8862306a36Sopenharmony_ci 8962306a36Sopenharmony_ci#endif /* _I8042_IO_H */ 90