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
jornada_parse_kbd(struct jornadakbd * jornadakbd)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(input_dev,
93 EV_MSC, MSC_SCAN, scancode);
94 input_report_key(input_dev,
95 keymap[scancode],
96 !(new & bit));
97 sync_me = 1;
98 }
99 }
100 }
101
102 if (sync_me)
103 input_sync(input_dev);
104 }
105
jornada_scan_keyb(unsigned char * s)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((dc_static | *y++), PDCR);
144 __raw_writew((ec_static | *y++), PECR);
145 udelay(5);
146
147 /* Get scanline row */
148 __raw_writeb(*t++, PDDR);
149 __raw_writeb(*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(0xff, PDDR);
158 __raw_writeb(0xff, PEDR);
159
160 /* Enable all scanlines */
161 __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
162 __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);
163
164 /* Ignore extra keys and events */
165 *s++ = __raw_readb(PGDR);
166 *s++ = __raw_readb(PHDR);
167 }
168
jornadakbd680_poll(struct input_dev * input)169 static void jornadakbd680_poll(struct input_dev *input)
170 {
171 struct jornadakbd *jornadakbd = input_get_drvdata(input);
172
173 jornada_scan_keyb(jornadakbd->new_scan);
174 jornada_parse_kbd(jornadakbd);
175 memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
176 }
177
jornada680kbd_probe(struct platform_device * pdev)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(&pdev->dev, 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(input_dev, 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(input_dev, EV_MSC, MSC_SCAN);
215
216 error = input_setup_polling(input_dev, 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(input_dev, 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