projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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> | |
| 105eabfd | 28 | #elif defined(CONFIG_SH_CAYMAN) |
| 1da177e4 | 29 | #include <asm/irq.h> |
| 540c6c39 MW |
30 | #elif defined(CONFIG_PPC) |
| 31 | extern int of_i8042_kbd_irq; | |
| 32 | extern int of_i8042_aux_irq; | |
| 33 | # define I8042_KBD_IRQ of_i8042_kbd_irq | |
| 34 | # define I8042_AUX_IRQ of_i8042_aux_irq | |
| 1da177e4 LT |
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 | ||
| 49 | static inline int i8042_read_data(void) | |
| 50 | { | |
| 51 | return inb(I8042_DATA_REG); | |
| 52 | } | |
| 53 | ||
| 54 | static inline int i8042_read_status(void) | |
| 55 | { | |
| 56 | return inb(I8042_STATUS_REG); | |
| 57 | } | |
| 58 | ||
| 59 | static inline void i8042_write_data(int val) | |
| 60 | { | |
| 61 | outb(val, I8042_DATA_REG); | |
| 62 | } | |
| 63 | ||
| 64 | static inline void i8042_write_command(int val) | |
| 65 | { | |
| 66 | outb(val, I8042_COMMAND_REG); | |
| 67 | } | |
| 68 | ||
| 69 | static 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 | */ | |
| 68e1ee62 | 75 | #if defined(CONFIG_PPC) |
| 1da177e4 | 76 | if (check_legacy_ioport(I8042_DATA_REG)) |
| 30cbc222 OH |
77 | return -ENODEV; |
| 78 | #endif | |
| 197a1e96 | 79 | #if !defined(__sh__) && !defined(__alpha__) |
| 1da177e4 | 80 | if (!request_region(I8042_DATA_REG, 16, "i8042")) |
| 8d5987a6 | 81 | return -EBUSY; |
| 1da177e4 | 82 | #endif |
| 30cbc222 OH |
83 | |
| 84 | i8042_reset = 1; | |
| 1da177e4 LT |
85 | return 0; |
| 86 | } | |
| 87 | ||
| 88 | static inline void i8042_platform_exit(void) | |
| 89 | { | |
| 30cbc222 | 90 | #if !defined(__sh__) && !defined(__alpha__) |
| 1da177e4 LT |
91 | release_region(I8042_DATA_REG, 16); |
| 92 | #endif | |
| 93 | } | |
| 94 | ||
| 95 | #endif /* _I8042_IO_H */ |