drivers/input/keyboard/spitzkbd.c

   1 /*
   2  *  Keyboard driver for Sharp Spitz, Borzoi and Akita (SL-Cxx00 series)
   3  *
   4  *  Copyright (c) 2005 Richard Purdie
   5  *
   6  *  Based on corgikbd.c
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/delay.h>
  15 #include <linux/device.h>
  16 #include <linux/init.h>
  17 #include <linux/input.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/jiffies.h>
  20 #include <linux/module.h>
  21 #include <linux/slab.h>
  22 #include <asm/irq.h>
  23
  24 #include <asm/arch/spitz.h>
  25 #include <asm/arch/hardware.h>
  26 #include <asm/arch/pxa-regs.h>
  27
  28 #define KB_ROWS                 7
  29 #define KB_COLS                 11
  30 #define KB_ROWMASK(r)           (1 << (r))
  31 #define SCANCODE(r,c)           (((r)<<4) + (c) + 1)
  32 #define NR_SCANCODES            ((KB_ROWS<<4) + 1)
  33
  34 #define HINGE_SCAN_INTERVAL     (150) /* ms */
  35
  36 #define SPITZ_KEY_CALENDER      KEY_F1
  37 #define SPITZ_KEY_ADDRESS       KEY_F2
  38 #define SPITZ_KEY_FN            KEY_F3
  39 #define SPITZ_KEY_CANCEL        KEY_F4
  40 #define SPITZ_KEY_EXOK          KEY_F5
  41 #define SPITZ_KEY_EXCANCEL      KEY_F6
  42 #define SPITZ_KEY_EXJOGDOWN     KEY_F7
  43 #define SPITZ_KEY_EXJOGUP       KEY_F8
  44 #define SPITZ_KEY_JAP1          KEY_LEFTALT
  45 #define SPITZ_KEY_JAP2          KEY_RIGHTCTRL
  46 #define SPITZ_KEY_SYNC          KEY_F9
  47 #define SPITZ_KEY_MAIL          KEY_F10
  48 #define SPITZ_KEY_OK            KEY_F11
  49 #define SPITZ_KEY_MENU          KEY_F12
  50
  51 static unsigned char spitzkbd_keycode[NR_SCANCODES] = {
  52         0,                                                                                                                /* 0 */
  53         KEY_LEFTCTRL, KEY_1, KEY_3, KEY_5, KEY_6, KEY_7, KEY_9, KEY_0, KEY_BACKSPACE, SPITZ_KEY_EXOK, SPITZ_KEY_EXCANCEL, 0, 0, 0, 0, 0,  /* 1-16 */
  54         0, KEY_2, KEY_4, KEY_R, KEY_Y, KEY_8, KEY_I, KEY_O, KEY_P, SPITZ_KEY_EXJOGDOWN, SPITZ_KEY_EXJOGUP, 0, 0, 0, 0, 0, /* 17-32 */
  55         KEY_TAB, KEY_Q, KEY_E, KEY_T, KEY_G, KEY_U, KEY_J, KEY_K, 0, 0, 0, 0, 0, 0, 0, 0,                                 /* 33-48 */
  56         SPITZ_KEY_CALENDER, KEY_W, KEY_S, KEY_F, KEY_V, KEY_H, KEY_M, KEY_L, 0, 0, KEY_RIGHTSHIFT, 0, 0, 0, 0, 0,         /* 49-64 */
  57         SPITZ_KEY_ADDRESS, KEY_A, KEY_D, KEY_C, KEY_B, KEY_N, KEY_DOT, 0, KEY_ENTER, KEY_LEFTSHIFT, 0, 0, 0, 0, 0, 0,     /* 65-80 */
  58         SPITZ_KEY_MAIL, KEY_Z, KEY_X, KEY_MINUS, KEY_SPACE, KEY_COMMA, 0, KEY_UP, 0, 0, SPITZ_KEY_FN, 0, 0, 0, 0, 0,      /* 81-96 */
  59         KEY_SYSRQ, SPITZ_KEY_JAP1, SPITZ_KEY_JAP2, SPITZ_KEY_CANCEL, SPITZ_KEY_OK, SPITZ_KEY_MENU, KEY_LEFT, KEY_DOWN, KEY_RIGHT, 0, 0, 0, 0, 0, 0, 0  /* 97-112 */
  60 };
  61
  62 static int spitz_strobes[] = {
  63         SPITZ_GPIO_KEY_STROBE0,
  64         SPITZ_GPIO_KEY_STROBE1,
  65         SPITZ_GPIO_KEY_STROBE2,
  66         SPITZ_GPIO_KEY_STROBE3,
  67         SPITZ_GPIO_KEY_STROBE4,
  68         SPITZ_GPIO_KEY_STROBE5,
  69         SPITZ_GPIO_KEY_STROBE6,
  70         SPITZ_GPIO_KEY_STROBE7,
  71         SPITZ_GPIO_KEY_STROBE8,
  72         SPITZ_GPIO_KEY_STROBE9,
  73         SPITZ_GPIO_KEY_STROBE10,
  74 };
  75
  76 static int spitz_senses[] = {
  77         SPITZ_GPIO_KEY_SENSE0,
  78         SPITZ_GPIO_KEY_SENSE1,
  79         SPITZ_GPIO_KEY_SENSE2,
  80         SPITZ_GPIO_KEY_SENSE3,
  81         SPITZ_GPIO_KEY_SENSE4,
  82         SPITZ_GPIO_KEY_SENSE5,
  83         SPITZ_GPIO_KEY_SENSE6,
  84 };
  85
  86 struct spitzkbd {
  87         unsigned char keycode[ARRAY_SIZE(spitzkbd_keycode)];
  88         struct input_dev input;
  89         char phys[32];
  90
  91         spinlock_t lock;
  92         struct timer_list timer;
  93         struct timer_list htimer;
  94
  95         unsigned int suspended;
  96         unsigned long suspend_jiffies;
  97 };
  98
  99 #define KB_DISCHARGE_DELAY      10
 100 #define KB_ACTIVATE_DELAY       10
 101
 102 /* Helper functions for reading the keyboard matrix
 103  * Note: We should really be using pxa_gpio_mode to alter GPDR but it
 104  *       requires a function call per GPIO bit which is excessive
 105  *       when we need to access 11 bits at once, multiple times.
 106  * These functions must be called within local_irq_save()/local_irq_restore()
 107  * or similar.
 108  */
 109 static inline void spitzkbd_discharge_all(void)
 110 {
 111         /* STROBE All HiZ */
 112         GPCR0  =  SPITZ_GPIO_G0_STROBE_BIT;
 113         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 114         GPCR1  =  SPITZ_GPIO_G1_STROBE_BIT;
 115         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 116         GPCR2  =  SPITZ_GPIO_G2_STROBE_BIT;
 117         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 118         GPCR3  =  SPITZ_GPIO_G3_STROBE_BIT;
 119         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 120 }
 121
 122 static inline void spitzkbd_activate_all(void)
 123 {
 124         /* STROBE ALL -> High */
 125         GPSR0  =  SPITZ_GPIO_G0_STROBE_BIT;
 126         GPDR0 |=  SPITZ_GPIO_G0_STROBE_BIT;
 127         GPSR1  =  SPITZ_GPIO_G1_STROBE_BIT;
 128         GPDR1 |=  SPITZ_GPIO_G1_STROBE_BIT;
 129         GPSR2  =  SPITZ_GPIO_G2_STROBE_BIT;
 130         GPDR2 |=  SPITZ_GPIO_G2_STROBE_BIT;
 131         GPSR3  =  SPITZ_GPIO_G3_STROBE_BIT;
 132         GPDR3 |=  SPITZ_GPIO_G3_STROBE_BIT;
 133
 134         udelay(KB_DISCHARGE_DELAY);
 135
 136         /* Clear any interrupts we may have triggered when altering the GPIO lines */
 137         GEDR0 = SPITZ_GPIO_G0_SENSE_BIT;
 138         GEDR1 = SPITZ_GPIO_G1_SENSE_BIT;
 139         GEDR2 = SPITZ_GPIO_G2_SENSE_BIT;
 140         GEDR3 = SPITZ_GPIO_G3_SENSE_BIT;
 141 }
 142
 143 static inline void spitzkbd_activate_col(int col)
 144 {
 145         int gpio = spitz_strobes[col];
 146         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 147         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 148         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 149         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 150         GPSR(gpio) = GPIO_bit(gpio);
 151         GPDR(gpio) |= GPIO_bit(gpio);
 152 }
 153
 154 static inline void spitzkbd_reset_col(int col)
 155 {
 156         int gpio = spitz_strobes[col];
 157         GPDR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
 158         GPDR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
 159         GPDR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
 160         GPDR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
 161         GPCR(gpio) = GPIO_bit(gpio);
 162         GPDR(gpio) |= GPIO_bit(gpio);
 163 }
 164
 165 static inline int spitzkbd_get_row_status(int col)
 166 {
 167         return ((GPLR0 >> 12) & 0x01) | ((GPLR0 >> 16) & 0x02)
 168                 | ((GPLR2 >> 25) & 0x04) | ((GPLR1 << 1) & 0x08)
 169                 | ((GPLR1 >> 0) & 0x10) | ((GPLR1 >> 1) & 0x60);
 170 }
 171
 172 /*
 173  * The spitz keyboard only generates interrupts when a key is pressed.
 174  * When a key is pressed, we enable a timer which then scans the
 175  * keyboard to detect when the key is released.
 176  */
 177
 178 /* Scan the hardware keyboard and push any changes up through the input layer */
 179 static void spitzkbd_scankeyboard(struct spitzkbd *spitzkbd_data, struct pt_regs *regs)
 180 {
 181         unsigned int row, col, rowd;
 182         unsigned long flags;
 183         unsigned int num_pressed, pwrkey = ((GPLR(SPITZ_GPIO_ON_KEY) & GPIO_bit(SPITZ_GPIO_ON_KEY)) != 0);
 184
 185         if (spitzkbd_data->suspended)
 186                 return;
 187
 188         spin_lock_irqsave(&spitzkbd_data->lock, flags);
 189
 190         if (regs)
 191                 input_regs(&spitzkbd_data->input, regs);
 192
 193         num_pressed = 0;
 194         for (col = 0; col < KB_COLS; col++) {
 195                 /*
 196                  * Discharge the output driver capacitatance
 197                  * in the keyboard matrix. (Yes it is significant..)
 198                  */
 199
 200                 spitzkbd_discharge_all();
 201                 udelay(KB_DISCHARGE_DELAY);
 202
 203                 spitzkbd_activate_col(col);
 204                 udelay(KB_ACTIVATE_DELAY);
 205
 206                 rowd = spitzkbd_get_row_status(col);
 207                 for (row = 0; row < KB_ROWS; row++) {
 208                         unsigned int scancode, pressed;
 209
 210                         scancode = SCANCODE(row, col);
 211                         pressed = rowd & KB_ROWMASK(row);
 212
 213                         input_report_key(&spitzkbd_data->input, spitzkbd_data->keycode[scancode], pressed);
 214
 215                         if (pressed)
 216                                 num_pressed++;
 217                 }
 218                 spitzkbd_reset_col(col);
 219         }
 220
 221         spitzkbd_activate_all();
 222
 223         input_report_key(&spitzkbd_data->input, SPITZ_KEY_SYNC, (GPLR(SPITZ_GPIO_SYNC) & GPIO_bit(SPITZ_GPIO_SYNC)) != 0 );
 224         input_report_key(&spitzkbd_data->input, KEY_SUSPEND, pwrkey);
 225
 226         if (pwrkey && time_after(jiffies, spitzkbd_data->suspend_jiffies + msecs_to_jiffies(1000))) {
 227                 input_event(&spitzkbd_data->input, EV_PWR, KEY_SUSPEND, 1);
 228                 spitzkbd_data->suspend_jiffies = jiffies;
 229         }
 230
 231         input_sync(&spitzkbd_data->input);
 232
 233         /* if any keys are pressed, enable the timer */
 234         if (num_pressed)
 235                 mod_timer(&spitzkbd_data->timer, jiffies + msecs_to_jiffies(100));
 236
 237         spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
 238 }
 239
 240 /*
 241  * spitz keyboard interrupt handler.
 242  */
 243 static irqreturn_t spitzkbd_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 244 {
 245         struct spitzkbd *spitzkbd_data = dev_id;
 246
 247         if (!timer_pending(&spitzkbd_data->timer)) {
 248                 /** wait chattering delay **/
 249                 udelay(20);
 250                 spitzkbd_scankeyboard(spitzkbd_data, regs);
 251         }
 252
 253         return IRQ_HANDLED;
 254 }
 255
 256 /*
 257  * spitz timer checking for released keys
 258  */
 259 static void spitzkbd_timer_callback(unsigned long data)
 260 {
 261         struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
 262         spitzkbd_scankeyboard(spitzkbd_data, NULL);
 263 }
 264
 265 /*
 266  * The hinge switches generate an interrupt.
 267  * We debounce the switches and pass them to the input system.
 268  */
 269
 270 static irqreturn_t spitzkbd_hinge_isr(int irq, void *dev_id, struct pt_regs *regs)
 271 {
 272         struct spitzkbd *spitzkbd_data = dev_id;
 273
 274         if (!timer_pending(&spitzkbd_data->htimer))
 275                 mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 276
 277         return IRQ_HANDLED;
 278 }
 279
 280 #define HINGE_STABLE_COUNT 2
 281 static int sharpsl_hinge_state;
 282 static int hinge_count;
 283
 284 static void spitzkbd_hinge_timer(unsigned long data)
 285 {
 286         struct spitzkbd *spitzkbd_data = (struct spitzkbd *) data;
 287         unsigned long state;
 288         unsigned long flags;
 289
 290         state = GPLR(SPITZ_GPIO_SWA) & (GPIO_bit(SPITZ_GPIO_SWA)|GPIO_bit(SPITZ_GPIO_SWB));
 291         if (state != sharpsl_hinge_state) {
 292                 hinge_count = 0;
 293                 sharpsl_hinge_state = state;
 294         } else if (hinge_count < HINGE_STABLE_COUNT) {
 295                 hinge_count++;
 296         }
 297
 298         if (hinge_count >= HINGE_STABLE_COUNT) {
 299                 spin_lock_irqsave(&spitzkbd_data->lock, flags);
 300
 301                 input_report_switch(&spitzkbd_data->input, SW_0, ((GPLR(SPITZ_GPIO_SWA) & GPIO_bit(SPITZ_GPIO_SWA)) != 0));
 302                 input_report_switch(&spitzkbd_data->input, SW_1, ((GPLR(SPITZ_GPIO_SWB) & GPIO_bit(SPITZ_GPIO_SWB)) != 0));
 303                 input_sync(&spitzkbd_data->input);
 304
 305                 spin_unlock_irqrestore(&spitzkbd_data->lock, flags);
 306         } else {
 307                 mod_timer(&spitzkbd_data->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 308         }
 309 }
 310
 311 #ifdef CONFIG_PM
 312 static int spitzkbd_suspend(struct device *dev, pm_message_t state, uint32_t level)
 313 {
 314         if (level == SUSPEND_POWER_DOWN) {
 315                 int i;
 316                 struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
 317                 spitzkbd->suspended = 1;
 318
 319                 /* Set Strobe lines as inputs - *except* strobe line 0 leave this
 320                    enabled so we can detect a power button press for resume */
 321                 for (i = 1; i < SPITZ_KEY_STROBE_NUM; i++)
 322                         pxa_gpio_mode(spitz_strobes[i] | GPIO_IN);
 323         }
 324         return 0;
 325 }
 326
 327 static int spitzkbd_resume(struct device *dev, uint32_t level)
 328 {
 329         if (level == RESUME_POWER_ON) {
 330                 int i;
 331                 struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
 332
 333                 for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
 334                         pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
 335
 336                 /* Upon resume, ignore the suspend key for a short while */
 337                 spitzkbd->suspend_jiffies = jiffies;
 338                 spitzkbd->suspended = 0;
 339         }
 340         return 0;
 341 }
 342 #else
 343 #define spitzkbd_suspend        NULL
 344 #define spitzkbd_resume         NULL
 345 #endif
 346
 347 static int __init spitzkbd_probe(struct device *dev)
 348 {
 349         int i;
 350         struct spitzkbd *spitzkbd;
 351
 352         spitzkbd = kzalloc(sizeof(struct spitzkbd), GFP_KERNEL);
 353         if (!spitzkbd)
 354                 return -ENOMEM;
 355
 356         dev_set_drvdata(dev,spitzkbd);
 357         strcpy(spitzkbd->phys, "spitzkbd/input0");
 358
 359         spin_lock_init(&spitzkbd->lock);
 360
 361         /* Init Keyboard rescan timer */
 362         init_timer(&spitzkbd->timer);
 363         spitzkbd->timer.function = spitzkbd_timer_callback;
 364         spitzkbd->timer.data = (unsigned long) spitzkbd;
 365
 366         /* Init Hinge Timer */
 367         init_timer(&spitzkbd->htimer);
 368         spitzkbd->htimer.function = spitzkbd_hinge_timer;
 369         spitzkbd->htimer.data = (unsigned long) spitzkbd;
 370
 371         spitzkbd->suspend_jiffies=jiffies;
 372
 373         init_input_dev(&spitzkbd->input);
 374         spitzkbd->input.private = spitzkbd;
 375         spitzkbd->input.name = "Spitz Keyboard";
 376         spitzkbd->input.dev = dev;
 377         spitzkbd->input.phys = spitzkbd->phys;
 378         spitzkbd->input.id.bustype = BUS_HOST;
 379         spitzkbd->input.id.vendor = 0x0001;
 380         spitzkbd->input.id.product = 0x0001;
 381         spitzkbd->input.id.version = 0x0100;
 382         spitzkbd->input.evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_PWR) | BIT(EV_SW);
 383         spitzkbd->input.keycode = spitzkbd->keycode;
 384         spitzkbd->input.keycodesize = sizeof(unsigned char);
 385         spitzkbd->input.keycodemax = ARRAY_SIZE(spitzkbd_keycode);
 386
 387         memcpy(spitzkbd->keycode, spitzkbd_keycode, sizeof(spitzkbd->keycode));
 388         for (i = 0; i < ARRAY_SIZE(spitzkbd_keycode); i++)
 389                 set_bit(spitzkbd->keycode[i], spitzkbd->input.keybit);
 390         clear_bit(0, spitzkbd->input.keybit);
 391         set_bit(SW_0, spitzkbd->input.swbit);
 392         set_bit(SW_1, spitzkbd->input.swbit);
 393
 394         input_register_device(&spitzkbd->input);
 395         mod_timer(&spitzkbd->htimer, jiffies + msecs_to_jiffies(HINGE_SCAN_INTERVAL));
 396
 397         /* Setup sense interrupts - RisingEdge Detect, sense lines as inputs */
 398         for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++) {
 399                 pxa_gpio_mode(spitz_senses[i] | GPIO_IN);
 400                 if (request_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd_interrupt,
 401                                                 SA_INTERRUPT, "Spitzkbd Sense", spitzkbd))
 402                         printk(KERN_WARNING "spitzkbd: Can't get Sense IRQ: %d!\n", i);
 403                 else
 404                         set_irq_type(IRQ_GPIO(spitz_senses[i]),IRQT_RISING);
 405         }
 406
 407         /* Set Strobe lines as outputs - set high */
 408         for (i = 0; i < SPITZ_KEY_STROBE_NUM; i++)
 409                 pxa_gpio_mode(spitz_strobes[i] | GPIO_OUT | GPIO_DFLT_HIGH);
 410
 411         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
 412         pxa_gpio_mode(SPITZ_GPIO_ON_KEY | GPIO_IN);
 413         pxa_gpio_mode(SPITZ_GPIO_SWA | GPIO_IN);
 414         pxa_gpio_mode(SPITZ_GPIO_SWB | GPIO_IN);
 415
 416         request_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd Sync", spitzkbd);
 417         request_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd_interrupt, SA_INTERRUPT, "Spitzkbd PwrOn", spitzkbd);
 418         request_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWA", spitzkbd);
 419         request_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd_hinge_isr, SA_INTERRUPT, "Spitzkbd SWB", spitzkbd);
 420
 421         set_irq_type(SPITZ_IRQ_GPIO_SYNC, IRQT_BOTHEDGE);
 422         set_irq_type(SPITZ_IRQ_GPIO_ON_KEY, IRQT_BOTHEDGE);
 423         set_irq_type(SPITZ_IRQ_GPIO_SWA, IRQT_BOTHEDGE);
 424         set_irq_type(SPITZ_IRQ_GPIO_SWB, IRQT_BOTHEDGE);
 425
 426         printk(KERN_INFO "input: Spitz Keyboard Registered\n");
 427
 428         return 0;
 429 }
 430
 431 static int spitzkbd_remove(struct device *dev)
 432 {
 433         int i;
 434         struct spitzkbd *spitzkbd = dev_get_drvdata(dev);
 435
 436         for (i = 0; i < SPITZ_KEY_SENSE_NUM; i++)
 437                 free_irq(IRQ_GPIO(spitz_senses[i]), spitzkbd);
 438
 439         free_irq(SPITZ_IRQ_GPIO_SYNC, spitzkbd);
 440         free_irq(SPITZ_IRQ_GPIO_ON_KEY, spitzkbd);
 441         free_irq(SPITZ_IRQ_GPIO_SWA, spitzkbd);
 442         free_irq(SPITZ_IRQ_GPIO_SWB, spitzkbd);
 443
 444         del_timer_sync(&spitzkbd->htimer);
 445         del_timer_sync(&spitzkbd->timer);
 446
 447         input_unregister_device(&spitzkbd->input);
 448
 449         kfree(spitzkbd);
 450
 451         return 0;
 452 }
 453
 454 static struct device_driver spitzkbd_driver = {
 455         .name           = "spitz-keyboard",
 456         .bus            = &platform_bus_type,
 457         .probe          = spitzkbd_probe,
 458         .remove         = spitzkbd_remove,
 459         .suspend        = spitzkbd_suspend,
 460         .resume         = spitzkbd_resume,
 461 };
 462
 463 static int __devinit spitzkbd_init(void)
 464 {
 465         return driver_register(&spitzkbd_driver);
 466 }
 467
 468 static void __exit spitzkbd_exit(void)
 469 {
 470         driver_unregister(&spitzkbd_driver);
 471 }
 472
 473 module_init(spitzkbd_init);
 474 module_exit(spitzkbd_exit);
 475
 476 MODULE_AUTHOR("Richard Purdie <rpurdie@rpsys.net>");
 477 MODULE_DESCRIPTION("Spitz Keyboard Driver");
 478 MODULE_LICENSE("GPLv2");