1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * drivers/input/keyboard/jornada680_kbd.c |
4 | * |
5 | * HP Jornada 620/660/680/690 scan keyboard platform driver |
6 | * Copyright (C) 2007 Kristoffer Ericson <Kristoffer.Ericson@gmail.com> |
7 | * |
8 | * Based on hp680_keyb.c |
9 | * Copyright (C) 2006 Paul Mundt |
10 | * Copyright (C) 2005 Andriy Skulysh |
11 | * Split from drivers/input/keyboard/hp600_keyb.c |
12 | * Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table) |
13 | * Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table) |
14 | */ |
15 | |
16 | #include <linux/device.h> |
17 | #include <linux/input.h> |
18 | #include <linux/interrupt.h> |
19 | #include <linux/jiffies.h> |
20 | #include <linux/kernel.h> |
21 | #include <linux/module.h> |
22 | #include <linux/platform_device.h> |
23 | #include <linux/slab.h> |
24 | |
25 | #include <asm/delay.h> |
26 | #include <asm/io.h> |
27 | |
28 | #define PCCR 0xa4000104 |
29 | #define PDCR 0xa4000106 |
30 | #define PECR 0xa4000108 |
31 | #define PFCR 0xa400010a |
32 | #define PCDR 0xa4000124 |
33 | #define PDDR 0xa4000126 |
34 | #define PEDR 0xa4000128 |
35 | #define PFDR 0xa400012a |
36 | #define PGDR 0xa400012c |
37 | #define PHDR 0xa400012e |
38 | #define PJDR 0xa4000130 |
39 | #define PKDR 0xa4000132 |
40 | #define PLDR 0xa4000134 |
41 | |
42 | static const unsigned short jornada_scancodes[] = { |
43 | /* PTD1 */ KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0, /* 1 -> 8 */ |
44 | KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5, /* 9 -> 16 */ |
45 | /* PTD5 */ KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0, /* 17 -> 24 */ |
46 | KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N, /* 25 -> 32 */ |
47 | /* PTD7 */ KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0, /* 33 -> 40 */ |
48 | KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA, /* 41 -> 48 */ |
49 | /* PTE0 */ KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0, /* 49 -> 56 */ |
50 | KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0, /* 57 -> 64 */ |
51 | /* PTE1 */ KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0, /* 65 -> 72 */ |
52 | KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H, /* 73 -> 80 */ |
53 | /* PTE3 */ KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0, /* 81 -> 88 */ |
54 | 0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK, /* 89 -> 96 */ |
55 | /* PTE6 */ KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0, /* 97 -> 104 */ |
56 | KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y, /* 105 -> 112 */ |
57 | /* PTE7 */ KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0, /* 113 -> 120 */ |
58 | KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6, /* 121 -> 128 */ |
59 | /* **** */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
60 | 0, 0, 0, 0, 0 |
61 | }; |
62 | |
63 | #define JORNADA_SCAN_SIZE 18 |
64 | |
65 | struct jornadakbd { |
66 | struct input_dev *input; |
67 | unsigned short keymap[ARRAY_SIZE(jornada_scancodes)]; |
68 | unsigned char length; |
69 | unsigned char old_scan[JORNADA_SCAN_SIZE]; |
70 | unsigned char new_scan[JORNADA_SCAN_SIZE]; |
71 | }; |
72 | |
73 | static void jornada_parse_kbd(struct jornadakbd *jornadakbd) |
74 | { |
75 | struct input_dev *input_dev = jornadakbd->input; |
76 | unsigned short *keymap = jornadakbd->keymap; |
77 | unsigned int sync_me = 0; |
78 | unsigned int i, j; |
79 | |
80 | for (i = 0; i < JORNADA_SCAN_SIZE; i++) { |
81 | unsigned char new = jornadakbd->new_scan[i]; |
82 | unsigned char old = jornadakbd->old_scan[i]; |
83 | unsigned int xor = new ^ old; |
84 | |
85 | if (xor == 0) |
86 | continue; |
87 | |
88 | for (j = 0; j < 8; j++) { |
89 | unsigned int bit = 1 << j; |
90 | if (xor & bit) { |
91 | unsigned int scancode = (i << 3) + j; |
92 | input_event(dev: input_dev, |
93 | EV_MSC, MSC_SCAN, value: scancode); |
94 | input_report_key(dev: input_dev, |
95 | code: keymap[scancode], |
96 | value: !(new & bit)); |
97 | sync_me = 1; |
98 | } |
99 | } |
100 | } |
101 | |
102 | if (sync_me) |
103 | input_sync(dev: input_dev); |
104 | } |
105 | |
106 | static void jornada_scan_keyb(unsigned char *s) |
107 | { |
108 | int i; |
109 | unsigned short ec_static, dc_static; /* = UINT16_t */ |
110 | unsigned char matrix_switch[] = { |
111 | 0xfd, 0xff, /* PTD1 PD(1) */ |
112 | 0xdf, 0xff, /* PTD5 PD(5) */ |
113 | 0x7f, 0xff, /* PTD7 PD(7) */ |
114 | 0xff, 0xfe, /* PTE0 PE(0) */ |
115 | 0xff, 0xfd, /* PTE1 PE(1) */ |
116 | 0xff, 0xf7, /* PTE3 PE(3) */ |
117 | 0xff, 0xbf, /* PTE6 PE(6) */ |
118 | 0xff, 0x7f, /* PTE7 PE(7) */ |
119 | }, *t = matrix_switch; |
120 | /* PD(x) : |
121 | 1. 0xcc0c & (1~(1 << (2*(x)+1))))) |
122 | 2. (0xf0cf & 0xfffff) */ |
123 | /* PE(x) : |
124 | 1. 0xcc0c & 0xffff |
125 | 2. 0xf0cf & (1~(1 << (2*(x)+1))))) */ |
126 | unsigned short matrix_PDE[] = { |
127 | 0xcc04, 0xf0cf, /* PD(1) */ |
128 | 0xc40c, 0xf0cf, /* PD(5) */ |
129 | 0x4c0c, 0xf0cf, /* PD(7) */ |
130 | 0xcc0c, 0xf0cd, /* PE(0) */ |
131 | 0xcc0c, 0xf0c7, /* PE(1) */ |
132 | 0xcc0c, 0xf04f, /* PE(3) */ |
133 | 0xcc0c, 0xd0cf, /* PE(6) */ |
134 | 0xcc0c, 0x70cf, /* PE(7) */ |
135 | }, *y = matrix_PDE; |
136 | |
137 | /* Save these control reg bits */ |
138 | dc_static = (__raw_readw(PDCR) & (~0xcc0c)); |
139 | ec_static = (__raw_readw(PECR) & (~0xf0cf)); |
140 | |
141 | for (i = 0; i < 8; i++) { |
142 | /* disable output for all but the one we want to scan */ |
143 | __raw_writew(val: (dc_static | *y++), PDCR); |
144 | __raw_writew(val: (ec_static | *y++), PECR); |
145 | udelay(5); |
146 | |
147 | /* Get scanline row */ |
148 | __raw_writeb(val: *t++, PDDR); |
149 | __raw_writeb(val: *t++, PEDR); |
150 | udelay(50); |
151 | |
152 | /* Read data */ |
153 | *s++ = __raw_readb(PCDR); |
154 | *s++ = __raw_readb(PFDR); |
155 | } |
156 | /* Scan no lines */ |
157 | __raw_writeb(val: 0xff, PDDR); |
158 | __raw_writeb(val: 0xff, PEDR); |
159 | |
160 | /* Enable all scanlines */ |
161 | __raw_writew(val: (dc_static | (0x5555 & 0xcc0c)),PDCR); |
162 | __raw_writew(val: (ec_static | (0x5555 & 0xf0cf)),PECR); |
163 | |
164 | /* Ignore extra keys and events */ |
165 | *s++ = __raw_readb(PGDR); |
166 | *s++ = __raw_readb(PHDR); |
167 | } |
168 | |
169 | static void jornadakbd680_poll(struct input_dev *input) |
170 | { |
171 | struct jornadakbd *jornadakbd = input_get_drvdata(dev: input); |
172 | |
173 | jornada_scan_keyb(s: jornadakbd->new_scan); |
174 | jornada_parse_kbd(jornadakbd); |
175 | memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE); |
176 | } |
177 | |
178 | static int jornada680kbd_probe(struct platform_device *pdev) |
179 | { |
180 | struct jornadakbd *jornadakbd; |
181 | struct input_dev *input_dev; |
182 | int i, error; |
183 | |
184 | jornadakbd = devm_kzalloc(dev: &pdev->dev, size: sizeof(struct jornadakbd), |
185 | GFP_KERNEL); |
186 | if (!jornadakbd) |
187 | return -ENOMEM; |
188 | |
189 | input_dev = devm_input_allocate_device(&pdev->dev); |
190 | if (!input_dev) { |
191 | dev_err(&pdev->dev, "failed to allocate input device\n" ); |
192 | return -ENOMEM; |
193 | } |
194 | |
195 | jornadakbd->input = input_dev; |
196 | |
197 | memcpy(jornadakbd->keymap, jornada_scancodes, |
198 | sizeof(jornadakbd->keymap)); |
199 | |
200 | input_set_drvdata(dev: input_dev, data: jornadakbd); |
201 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP); |
202 | input_dev->name = "HP Jornada 680 keyboard" ; |
203 | input_dev->phys = "jornadakbd/input0" ; |
204 | input_dev->keycode = jornadakbd->keymap; |
205 | input_dev->keycodesize = sizeof(unsigned short); |
206 | input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes); |
207 | input_dev->id.bustype = BUS_HOST; |
208 | |
209 | for (i = 0; i < 128; i++) |
210 | if (jornadakbd->keymap[i]) |
211 | __set_bit(jornadakbd->keymap[i], input_dev->keybit); |
212 | __clear_bit(KEY_RESERVED, input_dev->keybit); |
213 | |
214 | input_set_capability(dev: input_dev, EV_MSC, MSC_SCAN); |
215 | |
216 | error = input_setup_polling(dev: input_dev, poll_fn: jornadakbd680_poll); |
217 | if (error) { |
218 | dev_err(&pdev->dev, "failed to set up polling\n" ); |
219 | return error; |
220 | } |
221 | |
222 | input_set_poll_interval(dev: input_dev, interval: 50 /* msec */); |
223 | |
224 | error = input_register_device(input_dev); |
225 | if (error) { |
226 | dev_err(&pdev->dev, "failed to register input device\n" ); |
227 | return error; |
228 | } |
229 | |
230 | return 0; |
231 | } |
232 | |
233 | static struct platform_driver jornada680kbd_driver = { |
234 | .driver = { |
235 | .name = "jornada680_kbd" , |
236 | }, |
237 | .probe = jornada680kbd_probe, |
238 | }; |
239 | module_platform_driver(jornada680kbd_driver); |
240 | |
241 | MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>" ); |
242 | MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver" ); |
243 | MODULE_LICENSE("GPL v2" ); |
244 | MODULE_ALIAS("platform:jornada680_kbd" ); |
245 | |