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jornada680_kbd.c
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1 /*
2  * drivers/input/keyboard/jornada680_kbd.c
3  *
4  * HP Jornada 620/660/680/690 scan keyboard platform driver
5  * Copyright (C) 2007 Kristoffer Ericson <[email protected]>
6  *
7  * Based on hp680_keyb.c
8  * Copyright (C) 2006 Paul Mundt
9  * Copyright (C) 2005 Andriy Skulysh
10  * Split from drivers/input/keyboard/hp600_keyb.c
11  * Copyright (C) 2000 Yaegashi Takeshi (hp6xx kbd scan routine and translation table)
12  * Copyright (C) 2000 Niibe Yutaka (HP620 Keyb translation table)
13  *
14  * This program is free software; you can redistribute it and/or modify it
15  * under the terms of the GNU General Public License version 2 as
16  * published by the Free Software Foundation.
17  */
18 
19 #include <linux/init.h>
20 #include <linux/input.h>
21 #include <linux/input-polldev.h>
22 #include <linux/interrupt.h>
23 #include <linux/jiffies.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/slab.h>
28 
29 #include <asm/delay.h>
30 #include <asm/io.h>
31 
32 #define PCCR 0xa4000104
33 #define PDCR 0xa4000106
34 #define PECR 0xa4000108
35 #define PFCR 0xa400010a
36 #define PCDR 0xa4000124
37 #define PDDR 0xa4000126
38 #define PEDR 0xa4000128
39 #define PFDR 0xa400012a
40 #define PGDR 0xa400012c
41 #define PHDR 0xa400012e
42 #define PJDR 0xa4000130
43 #define PKDR 0xa4000132
44 #define PLDR 0xa4000134
45 
46 static const unsigned short jornada_scancodes[] = {
47 /* PTD1 */ KEY_CAPSLOCK, KEY_MACRO, KEY_LEFTCTRL, 0, KEY_ESC, KEY_KP5, 0, 0, /* 1 -> 8 */
48  KEY_F1, KEY_F2, KEY_F3, KEY_F8, KEY_F7, KEY_F6, KEY_F4, KEY_F5, /* 9 -> 16 */
49 /* PTD5 */ KEY_SLASH, KEY_APOSTROPHE, KEY_ENTER, 0, KEY_Z, 0, 0, 0, /* 17 -> 24 */
50  KEY_X, KEY_C, KEY_V, KEY_DOT, KEY_COMMA, KEY_M, KEY_B, KEY_N, /* 25 -> 32 */
51 /* PTD7 */ KEY_KP2, KEY_KP6, KEY_KP3, 0, 0, 0, 0, 0, /* 33 -> 40 */
52  KEY_F10, KEY_RO, KEY_F9, KEY_KP4, KEY_NUMLOCK, KEY_SCROLLLOCK, KEY_LEFTALT, KEY_HANJA, /* 41 -> 48 */
53 /* PTE0 */ KEY_KATAKANA, KEY_KP0, KEY_GRAVE, 0, KEY_FINANCE, 0, 0, 0, /* 49 -> 56 */
54  KEY_KPMINUS, KEY_HIRAGANA, KEY_SPACE, KEY_KPDOT, KEY_VOLUMEUP, 249, 0, 0, /* 57 -> 64 */
55 /* PTE1 */ KEY_SEMICOLON, KEY_RIGHTBRACE, KEY_BACKSLASH, 0, KEY_A, 0, 0, 0, /* 65 -> 72 */
56  KEY_S, KEY_D, KEY_F, KEY_L, KEY_K, KEY_J, KEY_G, KEY_H, /* 73 -> 80 */
57 /* PTE3 */ KEY_KP8, KEY_LEFTMETA, KEY_RIGHTSHIFT, 0, KEY_TAB, 0, 0, 0, /* 81 -> 88 */
58  0, KEY_LEFTSHIFT, KEY_KP7, KEY_KP9, KEY_KP1, KEY_F11, KEY_KPPLUS, KEY_KPASTERISK, /* 89 -> 96 */
59 /* PTE6 */ KEY_P, KEY_LEFTBRACE, KEY_BACKSPACE, 0, KEY_Q, 0, 0, 0, /* 97 -> 104 */
60  KEY_W, KEY_E, KEY_R, KEY_O, KEY_I, KEY_U, KEY_T, KEY_Y, /* 105 -> 112 */
61 /* PTE7 */ KEY_0, KEY_MINUS, KEY_EQUAL, 0, KEY_1, 0, 0, 0, /* 113 -> 120 */
62  KEY_2, KEY_3, KEY_4, KEY_9, KEY_8, KEY_7, KEY_5, KEY_6, /* 121 -> 128 */
63 /* **** */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
64  0, 0, 0, 0, 0
65 };
66 
67 #define JORNADA_SCAN_SIZE 18
68 
69 struct jornadakbd {
70  struct input_polled_dev *poll_dev;
71  unsigned short keymap[ARRAY_SIZE(jornada_scancodes)];
72  unsigned char length;
73  unsigned char old_scan[JORNADA_SCAN_SIZE];
74  unsigned char new_scan[JORNADA_SCAN_SIZE];
75 };
76 
77 static void jornada_parse_kbd(struct jornadakbd *jornadakbd)
78 {
79  struct input_dev *input_dev = jornadakbd->poll_dev->input;
80  unsigned short *keymap = jornadakbd->keymap;
81  unsigned int sync_me = 0;
82  unsigned int i, j;
83 
84  for (i = 0; i < JORNADA_SCAN_SIZE; i++) {
85  unsigned char new = jornadakbd->new_scan[i];
86  unsigned char old = jornadakbd->old_scan[i];
87  unsigned int xor = new ^ old;
88 
89  if (xor == 0)
90  continue;
91 
92  for (j = 0; j < 8; j++) {
93  unsigned int bit = 1 << j;
94  if (xor & bit) {
95  unsigned int scancode = (i << 3) + j;
96  input_event(input_dev,
97  EV_MSC, MSC_SCAN, scancode);
98  input_report_key(input_dev,
99  keymap[scancode],
100  !(new & bit));
101  sync_me = 1;
102  }
103  }
104  }
105 
106  if (sync_me)
107  input_sync(input_dev);
108 }
109 
110 static void jornada_scan_keyb(unsigned char *s)
111 {
112  int i;
113  unsigned short ec_static, dc_static; /* = UINT16_t */
114  unsigned char matrix_switch[] = {
115  0xfd, 0xff, /* PTD1 PD(1) */
116  0xdf, 0xff, /* PTD5 PD(5) */
117  0x7f, 0xff, /* PTD7 PD(7) */
118  0xff, 0xfe, /* PTE0 PE(0) */
119  0xff, 0xfd, /* PTE1 PE(1) */
120  0xff, 0xf7, /* PTE3 PE(3) */
121  0xff, 0xbf, /* PTE6 PE(6) */
122  0xff, 0x7f, /* PTE7 PE(7) */
123  }, *t = matrix_switch;
124  /* PD(x) :
125  1. 0xcc0c & (1~(1 << (2*(x)+1)))))
126  2. (0xf0cf & 0xfffff) */
127  /* PE(x) :
128  1. 0xcc0c & 0xffff
129  2. 0xf0cf & (1~(1 << (2*(x)+1))))) */
130  unsigned short matrix_PDE[] = {
131  0xcc04, 0xf0cf, /* PD(1) */
132  0xc40c, 0xf0cf, /* PD(5) */
133  0x4c0c, 0xf0cf, /* PD(7) */
134  0xcc0c, 0xf0cd, /* PE(0) */
135  0xcc0c, 0xf0c7, /* PE(1) */
136  0xcc0c, 0xf04f, /* PE(3) */
137  0xcc0c, 0xd0cf, /* PE(6) */
138  0xcc0c, 0x70cf, /* PE(7) */
139  }, *y = matrix_PDE;
140 
141  /* Save these control reg bits */
142  dc_static = (__raw_readw(PDCR) & (~0xcc0c));
143  ec_static = (__raw_readw(PECR) & (~0xf0cf));
144 
145  for (i = 0; i < 8; i++) {
146  /* disable output for all but the one we want to scan */
147  __raw_writew((dc_static | *y++), PDCR);
148  __raw_writew((ec_static | *y++), PECR);
149  udelay(5);
150 
151  /* Get scanline row */
152  __raw_writeb(*t++, PDDR);
153  __raw_writeb(*t++, PEDR);
154  udelay(50);
155 
156  /* Read data */
157  *s++ = __raw_readb(PCDR);
158  *s++ = __raw_readb(PFDR);
159  }
160  /* Scan no lines */
161  __raw_writeb(0xff, PDDR);
162  __raw_writeb(0xff, PEDR);
163 
164  /* Enable all scanlines */
165  __raw_writew((dc_static | (0x5555 & 0xcc0c)),PDCR);
166  __raw_writew((ec_static | (0x5555 & 0xf0cf)),PECR);
167 
168  /* Ignore extra keys and events */
169  *s++ = __raw_readb(PGDR);
170  *s++ = __raw_readb(PHDR);
171 }
172 
173 static void jornadakbd680_poll(struct input_polled_dev *dev)
174 {
175  struct jornadakbd *jornadakbd = dev->private;
176 
177  jornada_scan_keyb(jornadakbd->new_scan);
178  jornada_parse_kbd(jornadakbd);
179  memcpy(jornadakbd->old_scan, jornadakbd->new_scan, JORNADA_SCAN_SIZE);
180 }
181 
182 static int __devinit jornada680kbd_probe(struct platform_device *pdev)
183 {
184  struct jornadakbd *jornadakbd;
185  struct input_polled_dev *poll_dev;
186  struct input_dev *input_dev;
187  int i, error;
188 
189  jornadakbd = kzalloc(sizeof(struct jornadakbd), GFP_KERNEL);
190  if (!jornadakbd)
191  return -ENOMEM;
192 
193  poll_dev = input_allocate_polled_device();
194  if (!poll_dev) {
195  error = -ENOMEM;
196  goto failed;
197  }
198 
199  platform_set_drvdata(pdev, jornadakbd);
200 
201  jornadakbd->poll_dev = poll_dev;
202 
203  memcpy(jornadakbd->keymap, jornada_scancodes,
204  sizeof(jornadakbd->keymap));
205 
206  poll_dev->private = jornadakbd;
207  poll_dev->poll = jornadakbd680_poll;
208  poll_dev->poll_interval = 50; /* msec */
209 
210  input_dev = poll_dev->input;
211  input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
212  input_dev->name = "HP Jornada 680 keyboard";
213  input_dev->phys = "jornadakbd/input0";
214  input_dev->keycode = jornadakbd->keymap;
215  input_dev->keycodesize = sizeof(unsigned short);
216  input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
217  input_dev->dev.parent = &pdev->dev;
218  input_dev->id.bustype = BUS_HOST;
219 
220  for (i = 0; i < 128; i++)
221  if (jornadakbd->keymap[i])
222  __set_bit(jornadakbd->keymap[i], input_dev->keybit);
223  __clear_bit(KEY_RESERVED, input_dev->keybit);
224 
225  input_set_capability(input_dev, EV_MSC, MSC_SCAN);
226 
227  error = input_register_polled_device(jornadakbd->poll_dev);
228  if (error)
229  goto failed;
230 
231  return 0;
232 
233  failed:
234  printk(KERN_ERR "Jornadakbd: failed to register driver, error: %d\n",
235  error);
236  platform_set_drvdata(pdev, NULL);
237  input_free_polled_device(poll_dev);
238  kfree(jornadakbd);
239  return error;
240 
241 }
242 
243 static int __devexit jornada680kbd_remove(struct platform_device *pdev)
244 {
245  struct jornadakbd *jornadakbd = platform_get_drvdata(pdev);
246 
247  platform_set_drvdata(pdev, NULL);
248  input_unregister_polled_device(jornadakbd->poll_dev);
249  input_free_polled_device(jornadakbd->poll_dev);
250  kfree(jornadakbd);
251 
252  return 0;
253 }
254 
255 static struct platform_driver jornada680kbd_driver = {
256  .driver = {
257  .name = "jornada680_kbd",
258  .owner = THIS_MODULE,
259  },
260  .probe = jornada680kbd_probe,
261  .remove = __devexit_p(jornada680kbd_remove),
262 };
263 module_platform_driver(jornada680kbd_driver);
264 
265 MODULE_AUTHOR("Kristoffer Ericson <[email protected]>");
266 MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
267 MODULE_LICENSE("GPL v2");
268 MODULE_ALIAS("platform:jornada680_kbd");
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