| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | #ifndef _LINUX_I8042_H |
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| 3 | #define _LINUX_I8042_H |
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| 4 | |
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| 5 | |
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| 6 | #include <linux/errno.h> |
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| 7 | #include <linux/types.h> |
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| 8 | |
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| 9 | /* |
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| 10 | * Standard commands. |
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| 11 | */ |
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| 12 | |
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| 13 | #define I8042_CMD_CTL_RCTR 0x0120 |
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| 14 | #define I8042_CMD_CTL_WCTR 0x1060 |
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| 15 | #define I8042_CMD_CTL_TEST 0x01aa |
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| 16 | |
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| 17 | #define I8042_CMD_KBD_DISABLE 0x00ad |
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| 18 | #define I8042_CMD_KBD_ENABLE 0x00ae |
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| 19 | #define I8042_CMD_KBD_TEST 0x01ab |
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| 20 | #define I8042_CMD_KBD_LOOP 0x11d2 |
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| 21 | |
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| 22 | #define I8042_CMD_AUX_DISABLE 0x00a7 |
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| 23 | #define I8042_CMD_AUX_ENABLE 0x00a8 |
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| 24 | #define I8042_CMD_AUX_TEST 0x01a9 |
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| 25 | #define I8042_CMD_AUX_SEND 0x10d4 |
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| 26 | #define I8042_CMD_AUX_LOOP 0x11d3 |
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| 27 | |
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| 28 | #define I8042_CMD_MUX_PFX 0x0090 |
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| 29 | #define I8042_CMD_MUX_SEND 0x1090 |
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| 30 | |
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| 31 | /* |
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| 32 | * Status register bits. |
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| 33 | */ |
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| 34 | |
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| 35 | #define I8042_STR_PARITY 0x80 |
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| 36 | #define I8042_STR_TIMEOUT 0x40 |
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| 37 | #define I8042_STR_AUXDATA 0x20 |
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| 38 | #define I8042_STR_KEYLOCK 0x10 |
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| 39 | #define I8042_STR_CMDDAT 0x08 |
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| 40 | #define I8042_STR_MUXERR 0x04 |
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| 41 | #define I8042_STR_IBF 0x02 |
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| 42 | #define I8042_STR_OBF 0x01 |
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| 43 | |
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| 44 | /* |
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| 45 | * Control register bits. |
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| 46 | */ |
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| 47 | |
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| 48 | #define I8042_CTR_KBDINT 0x01 |
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| 49 | #define I8042_CTR_AUXINT 0x02 |
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| 50 | #define I8042_CTR_IGNKEYLOCK 0x08 |
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| 51 | #define I8042_CTR_KBDDIS 0x10 |
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| 52 | #define I8042_CTR_AUXDIS 0x20 |
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| 53 | #define I8042_CTR_XLATE 0x40 |
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| 54 | |
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| 55 | struct serio; |
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| 56 | |
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| 57 | /** |
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| 58 | * typedef i8042_filter_t - i8042 filter callback |
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| 59 | * @data: Data received by the i8042 controller |
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| 60 | * @str: Status register of the i8042 controller |
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| 61 | * @serio: Serio of the i8042 controller |
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| 62 | * @context: Context pointer associated with this callback |
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| 63 | * |
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| 64 | * This represents a i8042 filter callback which can be used with i8042_install_filter() |
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| 65 | * and i8042_remove_filter() to filter the i8042 input for platform-specific key codes. |
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| 66 | * |
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| 67 | * Context: Interrupt context. |
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| 68 | * Returns: true if the data should be filtered out, false if otherwise. |
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| 69 | */ |
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| 70 | typedef bool (*i8042_filter_t)(unsigned char data, unsigned char str, struct serio *serio, |
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| 71 | void *context); |
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| 72 | |
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| 73 | #if defined(CONFIG_SERIO_I8042) || defined(CONFIG_SERIO_I8042_MODULE) |
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| 74 | |
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| 75 | void i8042_lock_chip(void); |
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| 76 | void i8042_unlock_chip(void); |
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| 77 | int i8042_command(unsigned char *param, int command); |
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| 78 | int i8042_install_filter(i8042_filter_t filter, void *context); |
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| 79 | int i8042_remove_filter(i8042_filter_t filter); |
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| 80 | |
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| 81 | #else |
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| 82 | |
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| 83 | static inline void i8042_lock_chip(void) |
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| 84 | { |
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| 85 | } |
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| 86 | |
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| 87 | static inline void i8042_unlock_chip(void) |
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| 88 | { |
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| 89 | } |
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| 90 | |
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| 91 | static inline int i8042_command(unsigned char *param, int command) |
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| 92 | { |
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| 93 | return -ENODEV; |
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| 94 | } |
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| 95 | |
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| 96 | static inline int i8042_install_filter(i8042_filter_t filter, void *context) |
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| 97 | { |
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| 98 | return -ENODEV; |
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| 99 | } |
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| 100 | |
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| 101 | static inline int i8042_remove_filter(i8042_filter_t filter) |
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| 102 | { |
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| 103 | return -ENODEV; |
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| 104 | } |
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| 105 | |
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| 106 | #endif |
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| 107 | |
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| 108 | #endif |
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| 109 | |
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