The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/arm/versatile/pl050.c

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    1 /*
    2  * Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
    3  * All rights reserved.
    4  *
    5  * Based on dev/usb/input/ukbd.c  
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   26  * SUCH DAMAGE.
   27  */
   28 
   29 #include <sys/cdefs.h>
   30 __FBSDID("$FreeBSD: releng/10.0/sys/arm/versatile/pl050.c 244197 2012-12-13 23:19:13Z gonzo $");
   31 
   32 #include <sys/param.h>
   33 #include <sys/systm.h>
   34 #include <sys/bus.h>
   35 #include <sys/kernel.h>
   36 #include <sys/module.h>
   37 #include <sys/malloc.h>
   38 #include <sys/rman.h>
   39 #include <sys/proc.h>
   40 #include <sys/sched.h>
   41 #include <sys/kdb.h>
   42 
   43 #include <machine/bus.h>
   44 #include <machine/cpu.h>
   45 #include <machine/frame.h>
   46 #include <machine/intr.h>
   47 
   48 #include <dev/fdt/fdt_common.h>
   49 #include <dev/ofw/openfirm.h>
   50 #include <dev/ofw/ofw_bus.h>
   51 #include <dev/ofw/ofw_bus_subr.h>
   52 
   53 #include <sys/ioccom.h>
   54 #include <sys/filio.h>
   55 #include <sys/tty.h>
   56 #include <sys/kbio.h>
   57 
   58 #include <dev/kbd/kbdreg.h>
   59 
   60 #include <machine/bus.h>
   61 #include <machine/fdt.h>
   62 
   63 #include <dev/kbd/kbdtables.h>
   64 
   65 #define KMI_LOCK()      mtx_lock(&Giant)
   66 #define KMI_UNLOCK()    mtx_unlock(&Giant)
   67 
   68 #ifdef  INVARIANTS
   69 /*
   70  * Assert that the lock is held in all contexts
   71  * where the code can be executed.
   72  */
   73 #define KMI_LOCK_ASSERT()       mtx_assert(&Giant, MA_OWNED)
   74 /*
   75  * Assert that the lock is held in the contexts
   76  * where it really has to be so.
   77  */
   78 #define KMI_CTX_LOCK_ASSERT()                           \
   79         do {                                            \
   80                 if (!kdb_active && panicstr == NULL)    \
   81                         mtx_assert(&Giant, MA_OWNED);   \
   82         } while (0)
   83 #else
   84 #define KMI_LOCK_ASSERT()       (void)0
   85 #define KMI_CTX_LOCK_ASSERT()   (void)0
   86 #endif
   87 
   88 #define KMICR           0x00
   89 #define         KMICR_TYPE_NONPS2       (1 << 5)
   90 #define         KMICR_RXINTREN          (1 << 4)
   91 #define         KMICR_TXINTREN          (1 << 3)
   92 #define         KMICR_EN                (1 << 2)
   93 #define         KMICR_FKMID             (1 << 1)
   94 #define         KMICR_FKMIC             (1 << 0)
   95 #define KMISTAT         0x04
   96 #define         KMISTAT_TXEMPTY         (1 << 6)
   97 #define         KMISTAT_TXBUSY          (1 << 5)
   98 #define         KMISTAT_RXFULL          (1 << 4)
   99 #define         KMISTAT_RXBUSY          (1 << 3)
  100 #define         KMISTAT_RXPARITY        (1 << 2)
  101 #define         KMISTAT_KMIC            (1 << 1)
  102 #define         KMISTAT_KMID            (1 << 0)
  103 #define KMIDATA         0x08
  104 #define KMICLKDIV       0x0C
  105 #define KMIIR           0x10
  106 #define         KMIIR_TXINTR            (1 << 1)
  107 #define         KMIIR_RXINTR            (1 << 0)
  108 
  109 #define KMI_DRIVER_NAME          "kmi"
  110 #define KMI_NFKEY        (sizeof(fkey_tab)/sizeof(fkey_tab[0])) /* units */
  111 
  112 struct kmi_softc {
  113         keyboard_t sc_kbd;
  114         keymap_t sc_keymap;
  115         accentmap_t sc_accmap;
  116         fkeytab_t sc_fkeymap[KMI_NFKEY];
  117 
  118         struct resource*        sc_mem_res;
  119         struct resource*        sc_irq_res;
  120         void*                   sc_intr_hl;
  121 
  122         int                     sc_mode;                /* input mode (K_XLATE,K_RAW,K_CODE) */
  123         int                     sc_state;               /* shift/lock key state */
  124         int                     sc_accents;             /* accent key index (> 0) */
  125         uint32_t                sc_flags;               /* flags */
  126 #define KMI_FLAG_COMPOSE        0x00000001
  127 #define KMI_FLAG_POLLING        0x00000002
  128 
  129         struct                  thread *sc_poll_thread;
  130 };
  131 
  132 /* Read/Write macros for Timer used as timecounter */
  133 #define pl050_kmi_read_4(sc, reg)               \
  134         bus_read_4((sc)->sc_mem_res, (reg))
  135 
  136 #define pl050_kmi_write_4(sc, reg, val) \
  137         bus_write_4((sc)->sc_mem_res, (reg), (val))
  138 
  139 /* prototypes */
  140 static void     kmi_set_leds(struct kmi_softc *, uint8_t);
  141 static int      kmi_set_typematic(keyboard_t *, int);
  142 static uint32_t kmi_read_char(keyboard_t *, int);
  143 static void     kmi_clear_state(keyboard_t *);
  144 static int      kmi_ioctl(keyboard_t *, u_long, caddr_t);
  145 static int      kmi_enable(keyboard_t *);
  146 static int      kmi_disable(keyboard_t *);
  147 
  148 /* early keyboard probe, not supported */
  149 static int
  150 kmi_configure(int flags)
  151 {
  152         return (0);
  153 }
  154 
  155 /* detect a keyboard, not used */
  156 static int
  157 kmi_probe(int unit, void *arg, int flags)
  158 {
  159         return (ENXIO);
  160 }
  161 
  162 /* reset and initialize the device, not used */
  163 static int
  164 kmi_init(int unit, keyboard_t **kbdp, void *arg, int flags)
  165 {
  166         return (ENXIO);
  167 }
  168 
  169 /* test the interface to the device, not used */
  170 static int
  171 kmi_test_if(keyboard_t *kbd)
  172 {
  173         return (0);
  174 }
  175 
  176 /* finish using this keyboard, not used */
  177 static int
  178 kmi_term(keyboard_t *kbd)
  179 {
  180         return (ENXIO);
  181 }
  182 
  183 /* keyboard interrupt routine, not used */
  184 static int
  185 kmi_intr(keyboard_t *kbd, void *arg)
  186 {
  187 
  188         return (0);
  189 }
  190 
  191 /* lock the access to the keyboard, not used */
  192 static int
  193 kmi_lock(keyboard_t *kbd, int lock)
  194 {
  195         return (1);
  196 }
  197 
  198 /*
  199  * Enable the access to the device; until this function is called,
  200  * the client cannot read from the keyboard.
  201  */
  202 static int
  203 kmi_enable(keyboard_t *kbd)
  204 {
  205 
  206         KMI_LOCK();
  207         KBD_ACTIVATE(kbd);
  208         KMI_UNLOCK();
  209 
  210         return (0);
  211 }
  212 
  213 /* disallow the access to the device */
  214 static int
  215 kmi_disable(keyboard_t *kbd)
  216 {
  217 
  218         KMI_LOCK();
  219         KBD_DEACTIVATE(kbd);
  220         KMI_UNLOCK();
  221 
  222         return (0);
  223 }
  224 
  225 /* check if data is waiting */
  226 static int
  227 kmi_check(keyboard_t *kbd)
  228 {
  229         struct kmi_softc *sc = kbd->kb_data;
  230         uint32_t reg;
  231 
  232         KMI_CTX_LOCK_ASSERT();
  233 
  234         if (!KBD_IS_ACTIVE(kbd))
  235                 return (0);
  236 
  237         reg = pl050_kmi_read_4(sc, KMIIR);
  238         return (reg & KMIIR_RXINTR);
  239 }
  240 
  241 /* check if char is waiting */
  242 static int
  243 kmi_check_char_locked(keyboard_t *kbd)
  244 {
  245         KMI_CTX_LOCK_ASSERT();
  246 
  247         if (!KBD_IS_ACTIVE(kbd))
  248                 return (0);
  249 
  250         return (kmi_check(kbd));
  251 }
  252 
  253 static int
  254 kmi_check_char(keyboard_t *kbd)
  255 {
  256         int result;
  257 
  258         KMI_LOCK();
  259         result = kmi_check_char_locked(kbd);
  260         KMI_UNLOCK();
  261 
  262         return (result);
  263 }
  264 
  265 /* read one byte from the keyboard if it's allowed */
  266 /* Currently unused. */
  267 static int
  268 kmi_read(keyboard_t *kbd, int wait)
  269 {
  270         KMI_CTX_LOCK_ASSERT();
  271 
  272         if (!KBD_IS_ACTIVE(kbd))
  273                 return (-1);
  274 
  275         ++(kbd->kb_count);
  276         printf("Implement ME: %s\n", __func__);
  277         return (0);
  278 }
  279 
  280 /* read char from the keyboard */
  281 static uint32_t
  282 kmi_read_char_locked(keyboard_t *kbd, int wait)
  283 {
  284         struct kmi_softc *sc = kbd->kb_data;
  285         uint32_t reg, data;
  286 
  287         KMI_CTX_LOCK_ASSERT();
  288 
  289         if (!KBD_IS_ACTIVE(kbd))
  290                 return (NOKEY);
  291 
  292         reg = pl050_kmi_read_4(sc, KMIIR);
  293         if (reg & KMIIR_RXINTR) {
  294                 data = pl050_kmi_read_4(sc, KMIDATA);
  295                 return (data);
  296         }
  297 
  298         ++kbd->kb_count;
  299         return (NOKEY);
  300 }
  301 
  302 /* Currently wait is always false. */
  303 static uint32_t
  304 kmi_read_char(keyboard_t *kbd, int wait)
  305 {
  306         uint32_t keycode;
  307 
  308         KMI_LOCK();
  309         keycode = kmi_read_char_locked(kbd, wait);
  310         KMI_UNLOCK();
  311 
  312         return (keycode);
  313 }
  314 
  315 /* some useful control functions */
  316 static int
  317 kmi_ioctl_locked(keyboard_t *kbd, u_long cmd, caddr_t arg)
  318 {
  319         struct kmi_softc *sc = kbd->kb_data;
  320         int i;
  321 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
  322     defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
  323         int ival;
  324 
  325 #endif
  326 
  327         KMI_LOCK_ASSERT();
  328 
  329         switch (cmd) {
  330         case KDGKBMODE:         /* get keyboard mode */
  331                 *(int *)arg = sc->sc_mode;
  332                 break;
  333 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
  334     defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
  335         case _IO('K', 7):
  336                 ival = IOCPARM_IVAL(arg);
  337                 arg = (caddr_t)&ival;
  338                 /* FALLTHROUGH */
  339 #endif
  340         case KDSKBMODE:         /* set keyboard mode */
  341                 switch (*(int *)arg) {
  342                 case K_XLATE:
  343                         if (sc->sc_mode != K_XLATE) {
  344                                 /* make lock key state and LED state match */
  345                                 sc->sc_state &= ~LOCK_MASK;
  346                                 sc->sc_state |= KBD_LED_VAL(kbd);
  347                         }
  348                         /* FALLTHROUGH */
  349                 case K_RAW:
  350                 case K_CODE:
  351                         if (sc->sc_mode != *(int *)arg) {
  352                                 if ((sc->sc_flags & KMI_FLAG_POLLING) == 0)
  353                                         kmi_clear_state(kbd);
  354                                 sc->sc_mode = *(int *)arg;
  355                         }
  356                         break;
  357                 default:
  358                         return (EINVAL);
  359                 }
  360                 break;
  361 
  362         case KDGETLED:                  /* get keyboard LED */
  363                 *(int *)arg = KBD_LED_VAL(kbd);
  364                 break;
  365 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
  366     defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
  367         case _IO('K', 66):
  368                 ival = IOCPARM_IVAL(arg);
  369                 arg = (caddr_t)&ival;
  370                 /* FALLTHROUGH */
  371 #endif
  372         case KDSETLED:                  /* set keyboard LED */
  373                 /* NOTE: lock key state in "sc_state" won't be changed */
  374                 if (*(int *)arg & ~LOCK_MASK)
  375                         return (EINVAL);
  376 
  377                 i = *(int *)arg;
  378 
  379                 /* replace CAPS LED with ALTGR LED for ALTGR keyboards */
  380                 if (sc->sc_mode == K_XLATE &&
  381                     kbd->kb_keymap->n_keys > ALTGR_OFFSET) {
  382                         if (i & ALKED)
  383                                 i |= CLKED;
  384                         else
  385                                 i &= ~CLKED;
  386                 }
  387                 if (KBD_HAS_DEVICE(kbd))
  388                         kmi_set_leds(sc, i);
  389 
  390                 KBD_LED_VAL(kbd) = *(int *)arg;
  391                 break;
  392         case KDGKBSTATE:                /* get lock key state */
  393                 *(int *)arg = sc->sc_state & LOCK_MASK;
  394                 break;
  395 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
  396     defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
  397         case _IO('K', 20):
  398                 ival = IOCPARM_IVAL(arg);
  399                 arg = (caddr_t)&ival;
  400                 /* FALLTHROUGH */
  401 #endif
  402         case KDSKBSTATE:                /* set lock key state */
  403                 if (*(int *)arg & ~LOCK_MASK) {
  404                         return (EINVAL);
  405                 }
  406                 sc->sc_state &= ~LOCK_MASK;
  407                 sc->sc_state |= *(int *)arg;
  408 
  409                 /* set LEDs and quit */
  410                 return (kmi_ioctl(kbd, KDSETLED, arg));
  411 
  412         case KDSETREPEAT:               /* set keyboard repeat rate (new
  413                                          * interface) */
  414                 if (!KBD_HAS_DEVICE(kbd)) {
  415                         return (0);
  416                 }
  417                 if (((int *)arg)[1] < 0) {
  418                         return (EINVAL);
  419                 }
  420                 if (((int *)arg)[0] < 0) {
  421                         return (EINVAL);
  422                 }
  423                 if (((int *)arg)[0] < 200)      /* fastest possible value */
  424                         kbd->kb_delay1 = 200;
  425                 else
  426                         kbd->kb_delay1 = ((int *)arg)[0];
  427                 kbd->kb_delay2 = ((int *)arg)[1];
  428                 return (0);
  429 
  430 #if defined(COMPAT_FREEBSD6) || defined(COMPAT_FREEBSD5) || \
  431     defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
  432         case _IO('K', 67):
  433                 ival = IOCPARM_IVAL(arg);
  434                 arg = (caddr_t)&ival;
  435                 /* FALLTHROUGH */
  436 #endif
  437         case KDSETRAD:                  /* set keyboard repeat rate (old
  438                                          * interface) */
  439                 return (kmi_set_typematic(kbd, *(int *)arg));
  440 
  441         case PIO_KEYMAP:                /* set keyboard translation table */
  442         case OPIO_KEYMAP:               /* set keyboard translation table
  443                                          * (compat) */
  444         case PIO_KEYMAPENT:             /* set keyboard translation table
  445                                          * entry */
  446         case PIO_DEADKEYMAP:            /* set accent key translation table */
  447                 sc->sc_accents = 0;
  448                 /* FALLTHROUGH */
  449         default:
  450                 return (genkbd_commonioctl(kbd, cmd, arg));
  451         }
  452 
  453         return (0);
  454 }
  455 
  456 static int
  457 kmi_ioctl(keyboard_t *kbd, u_long cmd, caddr_t arg)
  458 {
  459         int result;
  460 
  461         /*
  462          * XXX KDGKBSTATE, KDSKBSTATE and KDSETLED can be called from any
  463          * context where printf(9) can be called, which among other things
  464          * includes interrupt filters and threads with any kinds of locks
  465          * already held.  For this reason it would be dangerous to acquire
  466          * the Giant here unconditionally.  On the other hand we have to
  467          * have it to handle the ioctl.
  468          * So we make our best effort to auto-detect whether we can grab
  469          * the Giant or not.  Blame syscons(4) for this.
  470          */
  471         switch (cmd) {
  472         case KDGKBSTATE:
  473         case KDSKBSTATE:
  474         case KDSETLED:
  475                 if (!mtx_owned(&Giant) && !SCHEDULER_STOPPED())
  476                         return (EDEADLK);       /* best I could come up with */
  477                 /* FALLTHROUGH */
  478         default:
  479                 KMI_LOCK();
  480                 result = kmi_ioctl_locked(kbd, cmd, arg);
  481                 KMI_UNLOCK();
  482                 return (result);
  483         }
  484 }
  485 
  486 
  487 /* clear the internal state of the keyboard */
  488 static void
  489 kmi_clear_state(keyboard_t *kbd)
  490 {
  491         struct kmi_softc *sc = kbd->kb_data;
  492 
  493         KMI_CTX_LOCK_ASSERT();
  494 
  495         sc->sc_flags &= ~(KMI_FLAG_COMPOSE | KMI_FLAG_POLLING);
  496         sc->sc_state &= LOCK_MASK;      /* preserve locking key state */
  497         sc->sc_accents = 0;
  498 }
  499 
  500 /* save the internal state, not used */
  501 static int
  502 kmi_get_state(keyboard_t *kbd, void *buf, size_t len)
  503 {
  504         return (len == 0) ? 1 : -1;
  505 }
  506 
  507 /* set the internal state, not used */
  508 static int
  509 kmi_set_state(keyboard_t *kbd, void *buf, size_t len)
  510 {
  511         return (EINVAL);
  512 }
  513 
  514 static int
  515 kmi_poll(keyboard_t *kbd, int on)
  516 {
  517         struct kmi_softc *sc = kbd->kb_data;
  518 
  519         KMI_LOCK();
  520         if (on) {
  521                 sc->sc_flags |= KMI_FLAG_POLLING;
  522                 sc->sc_poll_thread = curthread;
  523         } else {
  524                 sc->sc_flags &= ~KMI_FLAG_POLLING;
  525         }
  526         KMI_UNLOCK();
  527 
  528         return (0);
  529 }
  530 
  531 /* local functions */
  532 
  533 static void
  534 kmi_set_leds(struct kmi_softc *sc, uint8_t leds)
  535 {
  536 
  537         KMI_LOCK_ASSERT();
  538 
  539         /* start transfer, if not already started */
  540         printf("Implement me: %s\n", __func__);
  541 }
  542 
  543 static int
  544 kmi_set_typematic(keyboard_t *kbd, int code)
  545 {
  546         static const int delays[] = {250, 500, 750, 1000};
  547         static const int rates[] = {34, 38, 42, 46, 50, 55, 59, 63,
  548                 68, 76, 84, 92, 100, 110, 118, 126,
  549                 136, 152, 168, 184, 200, 220, 236, 252,
  550         272, 304, 336, 368, 400, 440, 472, 504};
  551 
  552         if (code & ~0x7f) {
  553                 return (EINVAL);
  554         }
  555         kbd->kb_delay1 = delays[(code >> 5) & 3];
  556         kbd->kb_delay2 = rates[code & 0x1f];
  557         return (0);
  558 }
  559 
  560 static keyboard_switch_t kmisw = {
  561         .probe = &kmi_probe,
  562         .init = &kmi_init,
  563         .term = &kmi_term,
  564         .intr = &kmi_intr,
  565         .test_if = &kmi_test_if,
  566         .enable = &kmi_enable,
  567         .disable = &kmi_disable,
  568         .read = &kmi_read,
  569         .check = &kmi_check,
  570         .read_char = &kmi_read_char,
  571         .check_char = &kmi_check_char,
  572         .ioctl = &kmi_ioctl,
  573         .lock = &kmi_lock,
  574         .clear_state = &kmi_clear_state,
  575         .get_state = &kmi_get_state,
  576         .set_state = &kmi_set_state,
  577         .get_fkeystr = &genkbd_get_fkeystr,
  578         .poll = &kmi_poll,
  579         .diag = &genkbd_diag,
  580 };
  581 
  582 KEYBOARD_DRIVER(kmi, kmisw, kmi_configure);
  583 
  584 static void
  585 pl050_kmi_intr(void *arg)
  586 {
  587         struct kmi_softc *sc = arg;
  588         uint32_t c;
  589 
  590         KMI_CTX_LOCK_ASSERT();
  591 
  592         if ((sc->sc_flags & KMI_FLAG_POLLING) != 0)
  593                 return;
  594 
  595         if (KBD_IS_ACTIVE(&sc->sc_kbd) &&
  596             KBD_IS_BUSY(&sc->sc_kbd)) {
  597                 /* let the callback function process the input */
  598                 (sc->sc_kbd.kb_callback.kc_func) (&sc->sc_kbd, KBDIO_KEYINPUT,
  599                     sc->sc_kbd.kb_callback.kc_arg);
  600         } else {
  601                 /* read and discard the input, no one is waiting for it */
  602                 do {
  603                         c = kmi_read_char_locked(&sc->sc_kbd, 0);
  604                 } while (c != NOKEY);
  605         }
  606 
  607 }
  608 
  609 static int
  610 pl050_kmi_probe(device_t dev)
  611 {
  612 
  613         if (ofw_bus_is_compatible(dev, "arm,pl050")) {
  614                 device_set_desc(dev, "PL050 Keyboard/Mouse Interface");
  615                 return (BUS_PROBE_DEFAULT);
  616         }
  617 
  618         return (ENXIO);
  619 }
  620 
  621 static int
  622 pl050_kmi_attach(device_t dev)
  623 {
  624         struct kmi_softc *sc = device_get_softc(dev);
  625         keyboard_t *kbd;
  626         int rid;
  627         int i;
  628 
  629         kbd = &sc->sc_kbd;
  630         rid = 0;
  631 
  632         sc->sc_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
  633         if (sc->sc_mem_res == NULL) {
  634                 device_printf(dev, "could not allocate memory resource\n");
  635                 return (ENXIO);
  636         }
  637 
  638         /* Request the IRQ resources */
  639         sc->sc_irq_res =  bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
  640         if (sc->sc_irq_res == NULL) {
  641                 device_printf(dev, "Error: could not allocate irq resources\n");
  642                 return (ENXIO);
  643         }
  644 
  645         /* Setup and enable the timer */
  646         if (bus_setup_intr(dev, sc->sc_irq_res, INTR_TYPE_CLK,
  647                         NULL, pl050_kmi_intr, sc,
  648                         &sc->sc_intr_hl) != 0) {
  649                 bus_release_resource(dev, SYS_RES_IRQ, rid,
  650                         sc->sc_irq_res);
  651                 device_printf(dev, "Unable to setup the clock irq handler.\n");
  652                 return (ENXIO);
  653         }
  654 
  655         /* TODO: clock & divisor */
  656 
  657         pl050_kmi_write_4(sc, KMICR, KMICR_EN | KMICR_RXINTREN);
  658 
  659         kbd_init_struct(kbd, KMI_DRIVER_NAME, KB_OTHER, 
  660                         device_get_unit(dev), 0, 0, 0);
  661         kbd->kb_data = (void *)sc;
  662 
  663         sc->sc_keymap = key_map;
  664         sc->sc_accmap = accent_map;
  665         for (i = 0; i < KMI_NFKEY; i++) {
  666                 sc->sc_fkeymap[i] = fkey_tab[i];
  667         }
  668 
  669         kbd_set_maps(kbd, &sc->sc_keymap, &sc->sc_accmap,
  670             sc->sc_fkeymap, KMI_NFKEY);
  671 
  672         KBD_FOUND_DEVICE(kbd);
  673         kmi_clear_state(kbd);
  674         KBD_PROBE_DONE(kbd);
  675 
  676         KBD_INIT_DONE(kbd);
  677 
  678         if (kbd_register(kbd) < 0) {
  679                 goto detach;
  680         }
  681         KBD_CONFIG_DONE(kbd);
  682 
  683 #ifdef KBD_INSTALL_CDEV
  684         if (kbd_attach(kbd)) {
  685                 goto detach;
  686         }
  687 #endif
  688 
  689         if (bootverbose) {
  690                 genkbd_diag(kbd, bootverbose);
  691         }
  692         return (0);
  693 
  694 detach:
  695         return (ENXIO);
  696 
  697 }
  698 
  699 static device_method_t pl050_kmi_methods[] = {
  700         DEVMETHOD(device_probe,         pl050_kmi_probe),
  701         DEVMETHOD(device_attach,        pl050_kmi_attach),
  702         { 0, 0 }
  703 };
  704 
  705 static driver_t pl050_kmi_driver = {
  706         "kmi",
  707         pl050_kmi_methods,
  708         sizeof(struct kmi_softc),
  709 };
  710 
  711 static devclass_t pl050_kmi_devclass;
  712 
  713 DRIVER_MODULE(pl050_kmi, simplebus, pl050_kmi_driver, pl050_kmi_devclass, 0, 0);

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