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Linux/drivers/input/keyboard/amikbd.c

  1 /*
  2  *  Copyright (c) 2000-2001 Vojtech Pavlik
  3  *
  4  *  Based on the work of:
  5  *      Hamish Macdonald
  6  */
  7 
  8 /*
  9  * Amiga keyboard driver for Linux/m68k
 10  */
 11 
 12 /*
 13  * This program is free software; you can redistribute it and/or modify
 14  * it under the terms of the GNU General Public License as published by
 15  * the Free Software Foundation; either version 2 of the License, or
 16  * (at your option) any later version.
 17  *
 18  * This program is distributed in the hope that it will be useful,
 19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 21  * GNU General Public License for more details.
 22  *
 23  * You should have received a copy of the GNU General Public License
 24  * along with this program; if not, write to the Free Software
 25  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 26  *
 27  * Should you need to contact me, the author, you can do so either by
 28  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 29  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 30  */
 31 
 32 #include <linux/module.h>
 33 #include <linux/init.h>
 34 #include <linux/input.h>
 35 #include <linux/delay.h>
 36 #include <linux/interrupt.h>
 37 #include <linux/keyboard.h>
 38 #include <linux/platform_device.h>
 39 
 40 #include <asm/amigaints.h>
 41 #include <asm/amigahw.h>
 42 #include <asm/irq.h>
 43 
 44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 45 MODULE_DESCRIPTION("Amiga keyboard driver");
 46 MODULE_LICENSE("GPL");
 47 
 48 #ifdef CONFIG_HW_CONSOLE
 49 static unsigned char amikbd_keycode[0x78] __initdata = {
 50         [0]      = KEY_GRAVE,
 51         [1]      = KEY_1,
 52         [2]      = KEY_2,
 53         [3]      = KEY_3,
 54         [4]      = KEY_4,
 55         [5]      = KEY_5,
 56         [6]      = KEY_6,
 57         [7]      = KEY_7,
 58         [8]      = KEY_8,
 59         [9]      = KEY_9,
 60         [10]     = KEY_0,
 61         [11]     = KEY_MINUS,
 62         [12]     = KEY_EQUAL,
 63         [13]     = KEY_BACKSLASH,
 64         [15]     = KEY_KP0,
 65         [16]     = KEY_Q,
 66         [17]     = KEY_W,
 67         [18]     = KEY_E,
 68         [19]     = KEY_R,
 69         [20]     = KEY_T,
 70         [21]     = KEY_Y,
 71         [22]     = KEY_U,
 72         [23]     = KEY_I,
 73         [24]     = KEY_O,
 74         [25]     = KEY_P,
 75         [26]     = KEY_LEFTBRACE,
 76         [27]     = KEY_RIGHTBRACE,
 77         [29]     = KEY_KP1,
 78         [30]     = KEY_KP2,
 79         [31]     = KEY_KP3,
 80         [32]     = KEY_A,
 81         [33]     = KEY_S,
 82         [34]     = KEY_D,
 83         [35]     = KEY_F,
 84         [36]     = KEY_G,
 85         [37]     = KEY_H,
 86         [38]     = KEY_J,
 87         [39]     = KEY_K,
 88         [40]     = KEY_L,
 89         [41]     = KEY_SEMICOLON,
 90         [42]     = KEY_APOSTROPHE,
 91         [43]     = KEY_BACKSLASH,
 92         [45]     = KEY_KP4,
 93         [46]     = KEY_KP5,
 94         [47]     = KEY_KP6,
 95         [48]     = KEY_102ND,
 96         [49]     = KEY_Z,
 97         [50]     = KEY_X,
 98         [51]     = KEY_C,
 99         [52]     = KEY_V,
100         [53]     = KEY_B,
101         [54]     = KEY_N,
102         [55]     = KEY_M,
103         [56]     = KEY_COMMA,
104         [57]     = KEY_DOT,
105         [58]     = KEY_SLASH,
106         [60]     = KEY_KPDOT,
107         [61]     = KEY_KP7,
108         [62]     = KEY_KP8,
109         [63]     = KEY_KP9,
110         [64]     = KEY_SPACE,
111         [65]     = KEY_BACKSPACE,
112         [66]     = KEY_TAB,
113         [67]     = KEY_KPENTER,
114         [68]     = KEY_ENTER,
115         [69]     = KEY_ESC,
116         [70]     = KEY_DELETE,
117         [74]     = KEY_KPMINUS,
118         [76]     = KEY_UP,
119         [77]     = KEY_DOWN,
120         [78]     = KEY_RIGHT,
121         [79]     = KEY_LEFT,
122         [80]     = KEY_F1,
123         [81]     = KEY_F2,
124         [82]     = KEY_F3,
125         [83]     = KEY_F4,
126         [84]     = KEY_F5,
127         [85]     = KEY_F6,
128         [86]     = KEY_F7,
129         [87]     = KEY_F8,
130         [88]     = KEY_F9,
131         [89]     = KEY_F10,
132         [90]     = KEY_KPLEFTPAREN,
133         [91]     = KEY_KPRIGHTPAREN,
134         [92]     = KEY_KPSLASH,
135         [93]     = KEY_KPASTERISK,
136         [94]     = KEY_KPPLUS,
137         [95]     = KEY_HELP,
138         [96]     = KEY_LEFTSHIFT,
139         [97]     = KEY_RIGHTSHIFT,
140         [98]     = KEY_CAPSLOCK,
141         [99]     = KEY_LEFTCTRL,
142         [100]    = KEY_LEFTALT,
143         [101]    = KEY_RIGHTALT,
144         [102]    = KEY_LEFTMETA,
145         [103]    = KEY_RIGHTMETA
146 };
147 
148 static void __init amikbd_init_console_keymaps(void)
149 {
150         /* We can spare 512 bytes on stack for temp_map in init path. */
151         unsigned short temp_map[NR_KEYS];
152         int i, j;
153 
154         for (i = 0; i < MAX_NR_KEYMAPS; i++) {
155                 if (!key_maps[i])
156                         continue;
157                 memset(temp_map, 0, sizeof(temp_map));
158                 for (j = 0; j < 0x78; j++) {
159                         if (!amikbd_keycode[j])
160                                 continue;
161                         temp_map[j] = key_maps[i][amikbd_keycode[j]];
162                 }
163                 for (j = 0; j < NR_KEYS; j++) {
164                         if (!temp_map[j])
165                                 temp_map[j] = 0xf200;
166                 }
167                 memcpy(key_maps[i], temp_map, sizeof(temp_map));
168         }
169 }
170 #else /* !CONFIG_HW_CONSOLE */
171 static inline void amikbd_init_console_keymaps(void) {}
172 #endif /* !CONFIG_HW_CONSOLE */
173 
174 static const char *amikbd_messages[8] = {
175         [0] = KERN_ALERT "amikbd: Ctrl-Amiga-Amiga reset warning!!\n",
176         [1] = KERN_WARNING "amikbd: keyboard lost sync\n",
177         [2] = KERN_WARNING "amikbd: keyboard buffer overflow\n",
178         [3] = KERN_WARNING "amikbd: keyboard controller failure\n",
179         [4] = KERN_ERR "amikbd: keyboard selftest failure\n",
180         [5] = KERN_INFO "amikbd: initiate power-up key stream\n",
181         [6] = KERN_INFO "amikbd: terminate power-up key stream\n",
182         [7] = KERN_WARNING "amikbd: keyboard interrupt\n"
183 };
184 
185 static irqreturn_t amikbd_interrupt(int irq, void *data)
186 {
187         struct input_dev *dev = data;
188         unsigned char scancode, down;
189 
190         scancode = ~ciaa.sdr;           /* get and invert scancode (keyboard is active low) */
191         ciaa.cra |= 0x40;               /* switch SP pin to output for handshake */
192         udelay(85);                     /* wait until 85 us have expired */
193         ciaa.cra &= ~0x40;              /* switch CIA serial port to input mode */
194 
195         down = !(scancode & 1);         /* lowest bit is release bit */
196         scancode >>= 1;
197 
198         if (scancode < 0x78) {          /* scancodes < 0x78 are keys */
199                 if (scancode == 98) {   /* CapsLock is a toggle switch key on Amiga */
200                         input_report_key(dev, scancode, 1);
201                         input_report_key(dev, scancode, 0);
202                 } else {
203                         input_report_key(dev, scancode, down);
204                 }
205 
206                 input_sync(dev);
207         } else                          /* scancodes >= 0x78 are error codes */
208                 printk(amikbd_messages[scancode - 0x78]);
209 
210         return IRQ_HANDLED;
211 }
212 
213 static int __init amikbd_probe(struct platform_device *pdev)
214 {
215         struct input_dev *dev;
216         int i, err;
217 
218         dev = input_allocate_device();
219         if (!dev) {
220                 dev_err(&pdev->dev, "Not enough memory for input device\n");
221                 return -ENOMEM;
222         }
223 
224         dev->name = pdev->name;
225         dev->phys = "amikbd/input0";
226         dev->id.bustype = BUS_AMIGA;
227         dev->id.vendor = 0x0001;
228         dev->id.product = 0x0001;
229         dev->id.version = 0x0100;
230         dev->dev.parent = &pdev->dev;
231 
232         dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP);
233 
234         for (i = 0; i < 0x78; i++)
235                 set_bit(i, dev->keybit);
236 
237         amikbd_init_console_keymaps();
238 
239         ciaa.cra &= ~0x41;       /* serial data in, turn off TA */
240         err = request_irq(IRQ_AMIGA_CIAA_SP, amikbd_interrupt, 0, "amikbd",
241                           dev);
242         if (err)
243                 goto fail2;
244 
245         err = input_register_device(dev);
246         if (err)
247                 goto fail3;
248 
249         platform_set_drvdata(pdev, dev);
250 
251         return 0;
252 
253  fail3: free_irq(IRQ_AMIGA_CIAA_SP, dev);
254  fail2: input_free_device(dev);
255         return err;
256 }
257 
258 static int __exit amikbd_remove(struct platform_device *pdev)
259 {
260         struct input_dev *dev = platform_get_drvdata(pdev);
261 
262         free_irq(IRQ_AMIGA_CIAA_SP, dev);
263         input_unregister_device(dev);
264         return 0;
265 }
266 
267 static struct platform_driver amikbd_driver = {
268         .remove = __exit_p(amikbd_remove),
269         .driver   = {
270                 .name   = "amiga-keyboard",
271         },
272 };
273 
274 module_platform_driver_probe(amikbd_driver, amikbd_probe);
275 
276 MODULE_ALIAS("platform:amiga-keyboard");
277 

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