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bab7614d EM |
1 | #ifndef _MATRIX_KEYPAD_H |
2 | #define _MATRIX_KEYPAD_H | |
3 | ||
4 | #include <linux/types.h> | |
5 | #include <linux/input.h> | |
6 | ||
7 | #define MATRIX_MAX_ROWS 16 | |
8 | #define MATRIX_MAX_COLS 16 | |
9 | ||
10 | #define KEY(row, col, val) ((((row) & (MATRIX_MAX_ROWS - 1)) << 24) |\ | |
11 | (((col) & (MATRIX_MAX_COLS - 1)) << 16) |\ | |
12 | (val & 0xffff)) | |
13 | ||
14 | #define KEY_ROW(k) (((k) >> 24) & 0xff) | |
15 | #define KEY_COL(k) (((k) >> 16) & 0xff) | |
16 | #define KEY_VAL(k) ((k) & 0xffff) | |
17 | ||
d82f1c35 EM |
18 | #define MATRIX_SCAN_CODE(row, col, row_shift) (((row) << (row_shift)) + (col)) |
19 | ||
bab7614d EM |
20 | /** |
21 | * struct matrix_keymap_data - keymap for matrix keyboards | |
22 | * @keymap: pointer to array of uint32 values encoded with KEY() macro | |
23 | * representing keymap | |
24 | * @keymap_size: number of entries (initialized) in this keymap | |
bab7614d EM |
25 | * |
26 | * This structure is supposed to be used by platform code to supply | |
27 | * keymaps to drivers that implement matrix-like keypads/keyboards. | |
28 | */ | |
29 | struct matrix_keymap_data { | |
30 | const uint32_t *keymap; | |
31 | unsigned int keymap_size; | |
bab7614d EM |
32 | }; |
33 | ||
34 | /** | |
35 | * struct matrix_keypad_platform_data - platform-dependent keypad data | |
36 | * @keymap_data: pointer to &matrix_keymap_data | |
d82f1c35 EM |
37 | * @row_gpios: pointer to array of gpio numbers representing rows |
38 | * @col_gpios: pointer to array of gpio numbers reporesenting colums | |
bab7614d EM |
39 | * @num_row_gpios: actual number of row gpios used by device |
40 | * @num_col_gpios: actual number of col gpios used by device | |
41 | * @col_scan_delay_us: delay, measured in microseconds, that is | |
42 | * needed before we can keypad after activating column gpio | |
43 | * @debounce_ms: debounce interval in milliseconds | |
d69249f4 DT |
44 | * @active_low: gpio polarity |
45 | * @wakeup: controls whether the device should be set up as wakeup | |
46 | * source | |
9d32c305 | 47 | * @no_autorepeat: disable key autorepeat |
bab7614d EM |
48 | * |
49 | * This structure represents platform-specific data that use used by | |
50 | * matrix_keypad driver to perform proper initialization. | |
51 | */ | |
52 | struct matrix_keypad_platform_data { | |
53 | const struct matrix_keymap_data *keymap_data; | |
54 | ||
d82f1c35 EM |
55 | const unsigned int *row_gpios; |
56 | const unsigned int *col_gpios; | |
57 | ||
bab7614d EM |
58 | unsigned int num_row_gpios; |
59 | unsigned int num_col_gpios; | |
60 | ||
61 | unsigned int col_scan_delay_us; | |
62 | ||
63 | /* key debounce interval in milli-second */ | |
64 | unsigned int debounce_ms; | |
65 | ||
66 | bool active_low; | |
67 | bool wakeup; | |
9d32c305 | 68 | bool no_autorepeat; |
bab7614d EM |
69 | }; |
70 | ||
77a53fd2 DT |
71 | /** |
72 | * matrix_keypad_build_keymap - convert platform keymap into matrix keymap | |
73 | * @keymap_data: keymap supplied by the platform code | |
74 | * @row_shift: number of bits to shift row value by to advance to the next | |
75 | * line in the keymap | |
76 | * @keymap: expanded version of keymap that is suitable for use by | |
77 | * matrix keyboad driver | |
78 | * @keybit: pointer to bitmap of keys supported by input device | |
79 | * | |
80 | * This function converts platform keymap (encoded with KEY() macro) into | |
81 | * an array of keycodes that is suitable for using in a standard matrix | |
82 | * keyboard driver that uses row and col as indices. | |
83 | */ | |
84 | static inline void | |
85 | matrix_keypad_build_keymap(const struct matrix_keymap_data *keymap_data, | |
86 | unsigned int row_shift, | |
87 | unsigned short *keymap, unsigned long *keybit) | |
88 | { | |
89 | int i; | |
90 | ||
91 | for (i = 0; i < keymap_data->keymap_size; i++) { | |
92 | unsigned int key = keymap_data->keymap[i]; | |
93 | unsigned int row = KEY_ROW(key); | |
94 | unsigned int col = KEY_COL(key); | |
95 | unsigned short code = KEY_VAL(key); | |
96 | ||
97 | keymap[MATRIX_SCAN_CODE(row, col, row_shift)] = code; | |
98 | __set_bit(code, keybit); | |
99 | } | |
100 | __clear_bit(KEY_RESERVED, keybit); | |
101 | } | |
102 | ||
bab7614d | 103 | #endif /* _MATRIX_KEYPAD_H */ |