| /* SPDX-License-Identifier: GPL-2.0-only */ |
| #ifndef _I8042_IO_H |
| #define _I8042_IO_H |
| |
| |
| /* |
| * Names. |
| */ |
| |
| #define I8042_KBD_PHYS_DESC "isa0060/serio0" |
| #define I8042_AUX_PHYS_DESC "isa0060/serio1" |
| #define I8042_MUX_PHYS_DESC "isa0060/serio%d" |
| |
| /* |
| * IRQs. |
| */ |
| |
| #if defined(__arm__) |
| /* defined in include/asm-arm/arch-xxx/irqs.h */ |
| #include <asm/irq.h> |
| #elif defined(CONFIG_PPC) |
| extern int of_i8042_kbd_irq; |
| extern int of_i8042_aux_irq; |
| # define I8042_KBD_IRQ of_i8042_kbd_irq |
| # define I8042_AUX_IRQ of_i8042_aux_irq |
| #else |
| # define I8042_KBD_IRQ 1 |
| # define I8042_AUX_IRQ 12 |
| #endif |
| |
| |
| /* |
| * Register numbers. |
| */ |
| |
| #define I8042_COMMAND_REG 0x64 |
| #define I8042_STATUS_REG 0x64 |
| #define I8042_DATA_REG 0x60 |
| |
| static inline int i8042_read_data(void) |
| { |
| return inb(I8042_DATA_REG); |
| } |
| |
| static inline int i8042_read_status(void) |
| { |
| return inb(I8042_STATUS_REG); |
| } |
| |
| static inline void i8042_write_data(int val) |
| { |
| outb(val, I8042_DATA_REG); |
| } |
| |
| static inline void i8042_write_command(int val) |
| { |
| outb(val, I8042_COMMAND_REG); |
| } |
| |
| static inline int i8042_platform_init(void) |
| { |
| /* |
| * On some platforms touching the i8042 data register region can do really |
| * bad things. Because of this the region is always reserved on such boxes. |
| */ |
| #if defined(CONFIG_PPC) |
| if (check_legacy_ioport(I8042_DATA_REG)) |
| return -ENODEV; |
| #endif |
| #if !defined(__sh__) && !defined(__alpha__) |
| if (!request_region(I8042_DATA_REG, 16, "i8042")) |
| return -EBUSY; |
| #endif |
| |
| i8042_reset = I8042_RESET_ALWAYS; |
| return 0; |
| } |
| |
| static inline void i8042_platform_exit(void) |
| { |
| #if !defined(__sh__) && !defined(__alpha__) |
| release_region(I8042_DATA_REG, 16); |
| #endif |
| } |
| |
| #endif /* _I8042_IO_H */ |
