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Linux/drivers/input/keyboard/jornada680_kbd.c

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

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