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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/device.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 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 = devm_kzalloc(&pdev->dev, sizeof(struct jornadakbd),
190                                   GFP_KERNEL);
191         if (!jornadakbd)
192                 return -ENOMEM;
193 
194         poll_dev = devm_input_allocate_polled_device(&pdev->dev);
195         if (!poll_dev) {
196                 dev_err(&pdev->dev, "failed to allocate polled input device\n");
197                 return -ENOMEM;
198         }
199 
200         platform_set_drvdata(pdev, jornadakbd);
201 
202         jornadakbd->poll_dev = poll_dev;
203 
204         memcpy(jornadakbd->keymap, jornada_scancodes,
205                 sizeof(jornadakbd->keymap));
206 
207         poll_dev->private = jornadakbd;
208         poll_dev->poll = jornadakbd680_poll;
209         poll_dev->poll_interval = 50; /* msec */
210 
211         input_dev = poll_dev->input;
212         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP);
213         input_dev->name = "HP Jornada 680 keyboard";
214         input_dev->phys = "jornadakbd/input0";
215         input_dev->keycode = jornadakbd->keymap;
216         input_dev->keycodesize = sizeof(unsigned short);
217         input_dev->keycodemax = ARRAY_SIZE(jornada_scancodes);
218         input_dev->dev.parent = &pdev->dev;
219         input_dev->id.bustype = BUS_HOST;
220 
221         for (i = 0; i < 128; i++)
222                 if (jornadakbd->keymap[i])
223                         __set_bit(jornadakbd->keymap[i], input_dev->keybit);
224         __clear_bit(KEY_RESERVED, input_dev->keybit);
225 
226         input_set_capability(input_dev, EV_MSC, MSC_SCAN);
227 
228         error = input_register_polled_device(jornadakbd->poll_dev);
229         if (error) {
230                 dev_err(&pdev->dev, "failed to register polled input device\n");
231                 return error;
232         }
233 
234         return 0;
235 }
236 
237 static struct platform_driver jornada680kbd_driver = {
238         .driver = {
239                 .name   = "jornada680_kbd",
240                 .owner  = THIS_MODULE,
241         },
242         .probe  = jornada680kbd_probe,
243 };
244 module_platform_driver(jornada680kbd_driver);
245 
246 MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
247 MODULE_DESCRIPTION("HP Jornada 620/660/680/690 Keyboard Driver");
248 MODULE_LICENSE("GPL v2");
249 MODULE_ALIAS("platform:jornada680_kbd");
250 

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