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