Rev 538 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 519 | mauro | 1 | /* |
| 538 | mauro | 2 | * Input driver keyboard module |
| 519 | mauro | 3 | */ |
| 4 | |||
| 5 | /* |
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| 6 | * This program is free software; you can redistribute it and/or modify |
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| 7 | * it under the terms of the GNU General Public License as published by |
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| 8 | * the Free Software Foundation; either version 2 of the License, or |
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| 9 | * (at your option) any later version. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include <linuxcomp.h> |
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| 22 | |||
| 23 | #include <linux/slab.h> |
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| 24 | #include <linux/module.h> |
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| 25 | #include <linux/input.h> |
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| 26 | #include <linux/init.h> |
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| 27 | #include <linux/device.h> |
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| 28 | |||
| 29 | #include <linux/kbd_kern.h> |
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| 30 | #include <linux/kbd_diacr.h> |
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| 31 | |||
| 32 | //#define DEBUG_KBD |
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| 33 | |||
| 34 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>"); |
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| 538 | mauro | 35 | MODULE_DESCRIPTION("Input driver keyboard module"); |
| 519 | mauro | 36 | MODULE_LICENSE("GPL"); |
| 37 | |||
| 522 | mauro | 38 | extern void shark_kbd_exec(void); |
| 519 | mauro | 39 | |
| 40 | /* Buffer Ssize */ |
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| 41 | #define KEYB_BUFFERSIZE 256 |
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| 42 | |||
| 43 | /* Buffer Mask ( i=(i+1)&MASK is better than i=(i+1)%SIZE ) */ |
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| 44 | #define KEYB_BUFFERMASK 0xff |
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| 45 | |||
| 46 | /* Circular Buffer */ |
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| 47 | static struct keyb_event { |
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| 48 | unsigned int keycode; |
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| 49 | int down; |
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| 50 | } kbuffer[KEYB_BUFFERSIZE]; |
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| 51 | |||
| 52 | /* |
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| 53 | * Buffer Pointers |
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| 54 | * data is inserted to khead |
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| 55 | * data is kept from ktail+1 |
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| 56 | * (khead point to ktail+1 when buffer is empty) |
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| 57 | */ |
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| 58 | static unsigned ktail, khead; |
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| 59 | |||
| 60 | static char kbd_name[] = "kbd"; |
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| 61 | static struct input_handler kbd_handler; |
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| 62 | |||
| 63 | static unsigned char ledstate = 0xff; /* undefined */ |
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| 64 | |||
| 65 | /* |
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| 66 | * Start / Stop Keyboard |
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| 67 | */ |
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| 68 | int kbd_enable(void) |
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| 69 | { |
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| 70 | struct list_head *node; |
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| 71 | |||
| 72 | list_for_each(node,&kbd_handler.h_list) { |
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| 73 | struct input_handle *handle = to_handle_h(node); |
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| 74 | struct input_dev *dev = handle->dev; |
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| 75 | |||
| 76 | if (test_bit(EV_REP, dev->evbit)) { |
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| 77 | input_event(dev, EV_PWR, 1, 0); |
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| 78 | } |
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| 79 | } |
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| 547 | mauro | 80 | |
| 519 | mauro | 81 | return 0; |
| 82 | } |
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| 83 | |||
| 84 | int kbd_disable(void) |
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| 85 | { |
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| 86 | struct list_head *node; |
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| 87 | |||
| 88 | list_for_each(node,&kbd_handler.h_list) { |
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| 89 | struct input_handle *handle = to_handle_h(node); |
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| 90 | struct input_dev *dev = handle->dev; |
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| 91 | |||
| 92 | if (test_bit(EV_REP, dev->evbit)) { |
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| 93 | input_event(dev, EV_PWR, 0, 0); |
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| 94 | } |
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| 95 | } |
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| 547 | mauro | 96 | |
| 519 | mauro | 97 | return 0; |
| 98 | } |
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| 99 | |||
| 100 | /* |
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| 101 | * Get data from the keyboard (primary port) |
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| 102 | * |
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| 103 | * it's follow the port_receive() semantic |
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| 104 | */ |
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| 105 | int kbd_get(unsigned int *data, BYTE access) |
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| 106 | { |
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| 107 | if ( ((ktail+1) & KEYB_BUFFERMASK) == ((khead) & KEYB_BUFFERMASK) ) |
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| 108 | return -1; |
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| 109 | |||
| 110 | ktail = (ktail+1) & KEYB_BUFFERMASK; |
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| 111 | *data = kbuffer[ktail].keycode; |
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| 112 | |||
| 113 | return kbuffer[ktail].down; |
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| 114 | } |
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| 115 | |||
| 116 | /* |
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| 117 | * Making beeps and bells. |
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| 118 | */ |
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| 119 | static void kbd_nosound(unsigned long ignored) |
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| 120 | { |
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| 121 | struct list_head * node; |
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| 122 | |||
| 123 | list_for_each(node,&kbd_handler.h_list) { |
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| 124 | struct input_handle *handle = to_handle_h(node); |
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| 125 | if (test_bit(EV_SND, handle->dev->evbit)) { |
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| 126 | if (test_bit(SND_TONE, handle->dev->sndbit)) |
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| 127 | input_event(handle->dev, EV_SND, SND_TONE, 0); |
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| 128 | if (test_bit(SND_BELL, handle->dev->sndbit)) |
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| 129 | input_event(handle->dev, EV_SND, SND_BELL, 0); |
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| 130 | } |
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| 131 | } |
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| 132 | } |
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| 133 | |||
| 134 | static struct timer_list kd_mksound_timer = |
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| 135 | TIMER_INITIALIZER(kbd_nosound, 0, 0); |
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| 136 | |||
| 137 | void kbd_mksound(unsigned int hz, unsigned int ticks) |
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| 138 | { |
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| 139 | struct list_head * node; |
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| 140 | |||
| 141 | del_timer(&kd_mksound_timer); |
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| 142 | |||
| 143 | if (hz) { |
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| 144 | list_for_each_prev(node,&kbd_handler.h_list) { |
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| 145 | struct input_handle *handle = to_handle_h(node); |
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| 146 | if (test_bit(EV_SND, handle->dev->evbit)) { |
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| 147 | if (test_bit(SND_TONE, handle->dev->sndbit)) { |
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| 148 | input_event(handle->dev, EV_SND, SND_TONE, hz); |
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| 149 | break; |
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| 150 | } |
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| 151 | if (test_bit(SND_BELL, handle->dev->sndbit)) { |
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| 152 | input_event(handle->dev, EV_SND, SND_BELL, 1); |
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| 153 | break; |
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| 154 | } |
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| 155 | } |
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| 156 | } |
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| 157 | if (ticks) |
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| 158 | mod_timer(&kd_mksound_timer, jiffies26 + ticks); |
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| 159 | } else |
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| 160 | kbd_nosound(0); |
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| 161 | } |
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| 162 | |||
| 163 | /* |
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| 164 | * Setting the keyboard rate. |
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| 165 | */ |
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| 166 | |||
| 167 | //int kbd_rate(struct kbd_repeat *rep) |
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| 168 | int kbd_rate(unsigned int *delay, unsigned int *period) |
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| 169 | { |
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| 170 | struct list_head *node; |
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| 171 | unsigned int d = 0; |
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| 172 | unsigned int p = 0; |
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| 173 | |||
| 174 | list_for_each(node,&kbd_handler.h_list) { |
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| 175 | struct input_handle *handle = to_handle_h(node); |
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| 176 | struct input_dev *dev = handle->dev; |
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| 177 | |||
| 178 | if (test_bit(EV_REP, dev->evbit)) { |
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| 179 | if (*delay > 0) |
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| 180 | input_event(dev, EV_REP, REP_DELAY, *delay); |
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| 181 | if (*period > 0) |
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| 182 | input_event(dev, EV_REP, REP_PERIOD, *period); |
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| 183 | d = dev->rep[REP_DELAY]; |
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| 184 | p = dev->rep[REP_PERIOD]; |
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| 185 | } |
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| 186 | } |
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| 187 | *delay = d; |
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| 188 | *period = p; |
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| 189 | return 0; |
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| 190 | } |
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| 191 | |||
| 192 | /* |
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| 193 | * This allows a keyboard to pick the LED state. |
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| 194 | */ |
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| 195 | void kbd_refresh_leds(void) |
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| 196 | { |
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| 197 | struct list_head * node; |
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| 198 | unsigned char leds = ledstate; |
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| 199 | |||
| 200 | list_for_each(node,&kbd_handler.h_list) { |
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| 201 | struct input_handle * handle = to_handle_h(node); |
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| 202 | input_event(handle->dev, EV_LED, LED_SCROLLL, !!(leds & 0x01)); |
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| 203 | input_event(handle->dev, EV_LED, LED_NUML, !!(leds & 0x02)); |
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| 204 | input_event(handle->dev, EV_LED, LED_CAPSL, !!(leds & 0x04)); |
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| 205 | input_sync(handle->dev); |
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| 206 | } |
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| 207 | } |
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| 208 | |||
| 209 | void kbd_setleds(unsigned int led) |
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| 210 | { |
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| 211 | ledstate = led; |
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| 212 | kbd_refresh_leds(); |
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| 213 | } |
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| 214 | |||
| 215 | static void kbd_event(struct input_handle *handle, unsigned int type, unsigned int keycode, int down) |
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| 216 | { |
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| 217 | if (type != EV_KEY) |
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| 218 | return; |
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| 219 | |||
| 220 | #ifdef DEBUG_KBD |
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| 221 | printk(KERN_DEBUG "keyboard.c: Event. Dev: %s, Type: %d, Code: %d, Value: %d\n", handle->dev->phys, type, keycode, down); |
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| 222 | #endif |
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| 223 | |||
| 224 | if (ktail != khead) { |
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| 225 | kbuffer[khead].keycode = keycode; |
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| 226 | kbuffer[khead].down = down; |
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| 227 | khead = (khead+1) & KEYB_BUFFERMASK; |
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| 228 | } |
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| 229 | |||
| 522 | mauro | 230 | shark_kbd_exec(); |
| 519 | mauro | 231 | } |
| 232 | |||
| 233 | static struct input_handle *kbd_connect(struct input_handler *handler, struct input_dev *dev, struct input_device_id *id) |
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| 234 | { |
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| 235 | struct input_handle *handle; |
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| 236 | int i; |
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| 237 | |||
| 238 | for (i = KEY_RESERVED; i < BTN_MISC; i++) |
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| 239 | if (test_bit(i, dev->keybit)) break; |
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| 240 | |||
| 241 | if ((i == BTN_MISC) && !test_bit(EV_SND, dev->evbit)) |
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| 242 | return NULL; |
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| 243 | |||
| 244 | if (!(handle = kmalloc(sizeof(struct input_handle), GFP_KERNEL))) |
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| 245 | return NULL; |
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| 246 | memset(handle, 0, sizeof(struct input_handle)); |
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| 247 | |||
| 248 | handle->dev = dev; |
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| 249 | handle->handler = handler; |
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| 250 | handle->name = kbd_name; |
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| 251 | |||
| 252 | input_open_device(handle); |
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| 253 | #ifdef DEBUG_KBD |
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| 254 | printk(KERN_DEBUG "keyboard.c: Connected device: \"%s\", %s\n", dev->name, dev->phys); |
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| 255 | #endif |
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| 256 | return handle; |
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| 257 | } |
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| 258 | |||
| 259 | static void kbd_disconnect(struct input_handle *handle) |
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| 260 | { |
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| 261 | #ifdef DEBUG_KBD |
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| 262 | printk(KERN_DEBUG "keyboard.c: Disconnected device: %s\n", handle->dev->phys); |
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| 263 | #endif |
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| 264 | |||
| 265 | input_close_device(handle); |
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| 266 | |||
| 267 | kfree(handle); |
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| 268 | } |
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| 269 | |||
| 270 | static struct input_device_id kbd_ids[] = { |
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| 271 | { |
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| 272 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT, |
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| 273 | .evbit = { BIT(EV_KEY) }, |
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| 274 | }, |
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| 275 | |||
| 276 | { |
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| 277 | .flags = INPUT_DEVICE_ID_MATCH_EVBIT, |
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| 278 | .evbit = { BIT(EV_SND) }, |
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| 279 | }, |
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| 280 | |||
| 281 | { }, /* Terminating entry */ |
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| 282 | }; |
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| 283 | |||
| 284 | MODULE_DEVICE_TABLE(input, kbd_ids); |
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| 285 | |||
| 286 | static struct input_handler kbd_handler = { |
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| 287 | .event = kbd_event, |
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| 288 | .connect = kbd_connect, |
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| 289 | .disconnect = kbd_disconnect, |
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| 290 | .name = "kbd", |
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| 291 | .id_table = kbd_ids, |
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| 292 | }; |
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| 293 | |||
| 294 | int __init kbd_init(void) |
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| 295 | { |
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| 296 | /* Initialize Buffer Variables */ |
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| 297 | khead=1; |
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| 298 | ktail=0; |
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| 299 | |||
| 300 | input_register_handler(&kbd_handler); |
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| 301 | |||
| 302 | return 0; |
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| 303 | } |
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| 304 | |||
| 305 | void __exit kbd_exit(void) |
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| 306 | { |
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| 307 | input_unregister_handler(&kbd_handler); |
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| 308 | } |
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| 309 | |||
| 310 | module_init(kbd_init); |
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| 311 | module_exit(kbd_exit); |