hw/pxa2xx_keypad.c

   1 /*
   2  * Intel PXA27X Keypad Controller emulation.
   3  *
   4  * Copyright (c) 2007 MontaVista Software, Inc
   5  * Written by Armin Kuster <akuster@kama-aina.net>
   6  *              or  <Akuster@mvista.com>
   7  *
   8  * This code is licensed under the GPLv2.
   9  */
  10
  11 #include "hw.h"
  12 #include "pxa.h"
  13 #include "console.h"
  14
  15 /*
  16  * Keypad
  17  */
  18 #define KPC         0x00    /* Keypad Interface Control register */
  19 #define KPDK        0x08    /* Keypad Interface Direct Key register */
  20 #define KPREC       0x10    /* Keypad Interface Rotary Encoder register */
  21 #define KPMK        0x18    /* Keypad Interface Matrix Key register */
  22 #define KPAS        0x20    /* Keypad Interface Automatic Scan register */
  23 #define KPASMKP0    0x28    /* Keypad Interface Automatic Scan Multiple
  24                                 Key Presser register 0 */
  25 #define KPASMKP1    0x30    /* Keypad Interface Automatic Scan Multiple
  26                                 Key Presser register 1 */
  27 #define KPASMKP2    0x38    /* Keypad Interface Automatic Scan Multiple
  28                                 Key Presser register 2 */
  29 #define KPASMKP3    0x40    /* Keypad Interface Automatic Scan Multiple
  30                                 Key Presser register 3 */
  31 #define KPKDI       0x48    /* Keypad Interface Key Debounce Interval
  32                                 register */
  33
  34 /* Keypad defines */
  35 #define KPC_AS          (0x1 << 30)  /* Automatic Scan bit */
  36 #define KPC_ASACT       (0x1 << 29)  /* Automatic Scan on Activity */
  37 #define KPC_MI          (0x1 << 22)  /* Matrix interrupt bit */
  38 #define KPC_IMKP        (0x1 << 21)  /* Ignore Multiple Key Press */
  39 #define KPC_MS7         (0x1 << 20)  /* Matrix scan line 7 */
  40 #define KPC_MS6         (0x1 << 19)  /* Matrix scan line 6 */
  41 #define KPC_MS5         (0x1 << 18)  /* Matrix scan line 5 */
  42 #define KPC_MS4         (0x1 << 17)  /* Matrix scan line 4 */
  43 #define KPC_MS3         (0x1 << 16)  /* Matrix scan line 3 */
  44 #define KPC_MS2         (0x1 << 15)  /* Matrix scan line 2 */
  45 #define KPC_MS1         (0x1 << 14)  /* Matrix scan line 1 */
  46 #define KPC_MS0         (0x1 << 13)  /* Matrix scan line 0 */
  47 #define KPC_ME          (0x1 << 12)  /* Matrix Keypad Enable */
  48 #define KPC_MIE         (0x1 << 11)  /* Matrix Interrupt Enable */
  49 #define KPC_DK_DEB_SEL  (0x1 <<  9)  /* Direct Keypad Debounce Select */
  50 #define KPC_DI          (0x1 <<  5)  /* Direct key interrupt bit */
  51 #define KPC_RE_ZERO_DEB (0x1 <<  4)  /* Rotary Encoder Zero Debounce */
  52 #define KPC_REE1        (0x1 <<  3)  /* Rotary Encoder1 Enable */
  53 #define KPC_REE0        (0x1 <<  2)  /* Rotary Encoder0 Enable */
  54 #define KPC_DE          (0x1 <<  1)  /* Direct Keypad Enable */
  55 #define KPC_DIE         (0x1 <<  0)  /* Direct Keypad interrupt Enable */
  56
  57 #define KPDK_DKP        (0x1 << 31)
  58 #define KPDK_DK7        (0x1 <<  7)
  59 #define KPDK_DK6        (0x1 <<  6)
  60 #define KPDK_DK5        (0x1 <<  5)
  61 #define KPDK_DK4        (0x1 <<  4)
  62 #define KPDK_DK3        (0x1 <<  3)
  63 #define KPDK_DK2        (0x1 <<  2)
  64 #define KPDK_DK1        (0x1 <<  1)
  65 #define KPDK_DK0        (0x1 <<  0)
  66
  67 #define KPREC_OF1       (0x1 << 31)
  68 #define KPREC_UF1       (0x1 << 30)
  69 #define KPREC_OF0       (0x1 << 15)
  70 #define KPREC_UF0       (0x1 << 14)
  71
  72 #define KPMK_MKP        (0x1 << 31)
  73 #define KPAS_SO         (0x1 << 31)
  74 #define KPASMKPx_SO     (0x1 << 31)
  75
  76
  77 #define KPASMKPx_MKC(row, col)  (1 << (row + 16 * (col % 2)))
  78
  79 #define PXAKBD_MAXROW   8
  80 #define PXAKBD_MAXCOL   8
  81
  82 struct PXA2xxKeyPadState {
  83     qemu_irq    irq;
  84     struct  keymap *map;
  85
  86     uint32_t    kpc;
  87     uint32_t    kpdk;
  88     uint32_t    kprec;
  89     uint32_t    kpmk;
  90     uint32_t    kpas;
  91     uint32_t    kpasmkp0;
  92     uint32_t    kpasmkp1;
  93     uint32_t    kpasmkp2;
  94     uint32_t    kpasmkp3;
  95     uint32_t    kpkdi;
  96 };
  97
  98 static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode)
  99 {
 100     int row, col,rel;
 101
 102     if(!(kp->kpc & KPC_ME)) /* skip if not enabled */
 103         return;
 104
 105     if(kp->kpc & KPC_AS || kp->kpc & KPC_ASACT) {
 106         if(kp->kpc & KPC_AS)
 107             kp->kpc &= ~(KPC_AS);
 108
 109         rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */
 110         keycode &= ~(0x80); /* strip qemu key release bit */
 111         row = kp->map[keycode].row;
 112         col = kp->map[keycode].column;
 113         if(row == -1 || col == -1)
 114             return;
 115         switch (col) {
 116         case 0:
 117         case 1:
 118             if(rel)
 119                 kp->kpasmkp0 = ~(0xffffffff);
 120             else
 121                 kp->kpasmkp0 |= KPASMKPx_MKC(row,col);
 122             break;
 123         case 2:
 124         case 3:
 125             if(rel)
 126                 kp->kpasmkp1 = ~(0xffffffff);
 127             else
 128                 kp->kpasmkp1 |= KPASMKPx_MKC(row,col);
 129             break;
 130         case 4:
 131         case 5:
 132             if(rel)
 133                 kp->kpasmkp2 = ~(0xffffffff);
 134             else
 135                 kp->kpasmkp2 |= KPASMKPx_MKC(row,col);
 136             break;
 137         case 6:
 138         case 7:
 139             if(rel)
 140                 kp->kpasmkp3 = ~(0xffffffff);
 141             else
 142                 kp->kpasmkp3 |= KPASMKPx_MKC(row,col);
 143             break;
 144         } /* switch */
 145         goto out;
 146     }
 147     return;
 148
 149 out:
 150     if(kp->kpc & KPC_MIE) {
 151         kp->kpc |= KPC_MI;
 152         qemu_irq_raise(kp->irq);
 153     }
 154     return;
 155 }
 156
 157 static uint32_t pxa2xx_keypad_read(void *opaque, target_phys_addr_t offset)
 158 {
 159     PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
 160     uint32_t tmp;
 161
 162     switch (offset) {
 163     case KPC:
 164         tmp = s->kpc;
 165         if(tmp & KPC_MI)
 166             s->kpc &= ~(KPC_MI);
 167         if(tmp & KPC_DI)
 168             s->kpc &= ~(KPC_DI);
 169         qemu_irq_lower(s->irq);
 170         return tmp;
 171         break;
 172     case KPDK:
 173         return s->kpdk;
 174         break;
 175     case KPREC:
 176         tmp = s->kprec;
 177         if(tmp & KPREC_OF1)
 178             s->kprec &= ~(KPREC_OF1);
 179         if(tmp & KPREC_UF1)
 180             s->kprec &= ~(KPREC_UF1);
 181         if(tmp & KPREC_OF0)
 182             s->kprec &= ~(KPREC_OF0);
 183         if(tmp & KPREC_UF0)
 184             s->kprec &= ~(KPREC_UF0);
 185         return tmp;
 186         break;
 187     case KPMK:
 188         tmp = s->kpmk;
 189         if(tmp & KPMK_MKP)
 190             s->kpmk &= ~(KPMK_MKP);
 191         return tmp;
 192         break;
 193     case KPAS:
 194         return s->kpas;
 195         break;
 196     case KPASMKP0:
 197         return s->kpasmkp0;
 198         break;
 199     case KPASMKP1:
 200         return s->kpasmkp1;
 201         break;
 202     case KPASMKP2:
 203         return s->kpasmkp2;
 204         break;
 205     case KPASMKP3:
 206         return s->kpasmkp3;
 207         break;
 208     case KPKDI:
 209         return s->kpkdi;
 210         break;
 211     default:
 212         hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
 213     }
 214
 215     return 0;
 216 }
 217
 218 static void pxa2xx_keypad_write(void *opaque,
 219                 target_phys_addr_t offset, uint32_t value)
 220 {
 221     PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
 222
 223     switch (offset) {
 224     case KPC:
 225         s->kpc = value;
 226         break;
 227     case KPDK:
 228         s->kpdk = value;
 229         break;
 230     case KPREC:
 231         s->kprec = value;
 232         break;
 233     case KPMK:
 234         s->kpmk = value;
 235         break;
 236     case KPAS:
 237         s->kpas = value;
 238         break;
 239     case KPASMKP0:
 240         s->kpasmkp0 = value;
 241         break;
 242     case KPASMKP1:
 243         s->kpasmkp1 = value;
 244         break;
 245     case KPASMKP2:
 246         s->kpasmkp2 = value;
 247         break;
 248     case KPASMKP3:
 249         s->kpasmkp3 = value;
 250         break;
 251     case KPKDI:
 252         s->kpkdi = value;
 253         break;
 254
 255     default:
 256         hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
 257     }
 258 }
 259
 260 static CPUReadMemoryFunc *pxa2xx_keypad_readfn[] = {
 261     pxa2xx_keypad_read,
 262     pxa2xx_keypad_read,
 263     pxa2xx_keypad_read
 264 };
 265
 266 static CPUWriteMemoryFunc *pxa2xx_keypad_writefn[] = {
 267     pxa2xx_keypad_write,
 268     pxa2xx_keypad_write,
 269     pxa2xx_keypad_write
 270 };
 271
 272 static void pxa2xx_keypad_save(QEMUFile *f, void *opaque)
 273 {
 274     PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
 275
 276     qemu_put_be32s(f, &s->kpc);
 277     qemu_put_be32s(f, &s->kpdk);
 278     qemu_put_be32s(f, &s->kprec);
 279     qemu_put_be32s(f, &s->kpmk);
 280     qemu_put_be32s(f, &s->kpas);
 281     qemu_put_be32s(f, &s->kpasmkp0);
 282     qemu_put_be32s(f, &s->kpasmkp1);
 283     qemu_put_be32s(f, &s->kpasmkp2);
 284     qemu_put_be32s(f, &s->kpasmkp3);
 285     qemu_put_be32s(f, &s->kpkdi);
 286
 287 }
 288
 289 static int pxa2xx_keypad_load(QEMUFile *f, void *opaque, int version_id)
 290 {
 291     PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
 292
 293     qemu_get_be32s(f, &s->kpc);
 294     qemu_get_be32s(f, &s->kpdk);
 295     qemu_get_be32s(f, &s->kprec);
 296     qemu_get_be32s(f, &s->kpmk);
 297     qemu_get_be32s(f, &s->kpas);
 298     qemu_get_be32s(f, &s->kpasmkp0);
 299     qemu_get_be32s(f, &s->kpasmkp1);
 300     qemu_get_be32s(f, &s->kpasmkp2);
 301     qemu_get_be32s(f, &s->kpasmkp3);
 302     qemu_get_be32s(f, &s->kpkdi);
 303
 304     return 0;
 305 }
 306
 307 PXA2xxKeyPadState *pxa27x_keypad_init(target_phys_addr_t base,
 308         qemu_irq irq)
 309 {
 310     int iomemtype;
 311     PXA2xxKeyPadState *s;
 312
 313     s = (PXA2xxKeyPadState *) qemu_mallocz(sizeof(PXA2xxKeyPadState));
 314     s->irq = irq;
 315
 316     iomemtype = cpu_register_io_memory(0, pxa2xx_keypad_readfn,
 317                     pxa2xx_keypad_writefn, s);
 318     cpu_register_physical_memory(base, 0x00100000, iomemtype);
 319
 320     register_savevm("pxa2xx_keypad", 0, 0,
 321                     pxa2xx_keypad_save, pxa2xx_keypad_load, s);
 322
 323     return s;
 324 }
 325
 326 void pxa27x_register_keypad(PXA2xxKeyPadState *kp, struct keymap *map,
 327         int size)
 328 {
 329     if(!map || size < 0x80) {
 330         fprintf(stderr, "%s - No PXA keypad map defined\n", __FUNCTION__);
 331         exit(-1);
 332     }
 333
 334     kp->map = map;
 335     qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp);
 336 }