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| 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) |
| 22 | extern int of_i8042_kbd_irq; |
| 23 | extern 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 | |
| 40 | static inline int i8042_read_data(void) |
| 41 | { |
| 42 | return inb(I8042_DATA_REG); |
| 43 | } |
| 44 | |
| 45 | static inline int i8042_read_status(void) |
| 46 | { |
| 47 | return inb(I8042_STATUS_REG); |
| 48 | } |
| 49 | |
| 50 | static inline void i8042_write_data(int val) |
| 51 | { |
| 52 | outb(val, I8042_DATA_REG); |
| 53 | } |
| 54 | |
| 55 | static inline void i8042_write_command(int val) |
| 56 | { |
| 57 | outb(val, I8042_COMMAND_REG); |
| 58 | } |
| 59 | |
| 60 | static 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 | |
| 79 | static 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 |
Warning: This file is not a C or C++ file. It does not have highlighting.