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pxa2xx_keypad.c
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pxa2xx_keypad.c
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/*
* Intel PXA27X Keypad Controller emulation.
*
* Copyright (c) 2007 MontaVista Software, Inc
* Written by Armin Kuster <akuster@kama-aina.net>
* or <Akuster@mvista.com>
*
* This code is licensed under the GPLv2.
*/
#include "hw.h"
#include "pxa.h"
#include "console.h"
/*
* Keypad
*/
#define KPC 0x00 /* Keypad Interface Control register */
#define KPDK 0x08 /* Keypad Interface Direct Key register */
#define KPREC 0x10 /* Keypad Interface Rotary Encoder register */
#define KPMK 0x18 /* Keypad Interface Matrix Key register */
#define KPAS 0x20 /* Keypad Interface Automatic Scan register */
#define KPASMKP0 0x28 /* Keypad Interface Automatic Scan Multiple
Key Presser register 0 */
#define KPASMKP1 0x30 /* Keypad Interface Automatic Scan Multiple
Key Presser register 1 */
#define KPASMKP2 0x38 /* Keypad Interface Automatic Scan Multiple
Key Presser register 2 */
#define KPASMKP3 0x40 /* Keypad Interface Automatic Scan Multiple
Key Presser register 3 */
#define KPKDI 0x48 /* Keypad Interface Key Debounce Interval
register */
/* Keypad defines */
#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
#define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */
#define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */
#define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */
#define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */
#define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */
#define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */
#define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */
#define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */
#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
#define KPDK_DKP (0x1 << 31)
#define KPDK_DK7 (0x1 << 7)
#define KPDK_DK6 (0x1 << 6)
#define KPDK_DK5 (0x1 << 5)
#define KPDK_DK4 (0x1 << 4)
#define KPDK_DK3 (0x1 << 3)
#define KPDK_DK2 (0x1 << 2)
#define KPDK_DK1 (0x1 << 1)
#define KPDK_DK0 (0x1 << 0)
#define KPREC_OF1 (0x1 << 31)
#define KPREC_UF1 (0x1 << 30)
#define KPREC_OF0 (0x1 << 15)
#define KPREC_UF0 (0x1 << 14)
#define KPMK_MKP (0x1 << 31)
#define KPAS_SO (0x1 << 31)
#define KPASMKPx_SO (0x1 << 31)
#define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2)))
#define PXAKBD_MAXROW 8
#define PXAKBD_MAXCOL 8
struct PXA2xxKeyPadState {
qemu_irq irq;
struct keymap *map;
uint32_t kpc;
uint32_t kpdk;
uint32_t kprec;
uint32_t kpmk;
uint32_t kpas;
uint32_t kpasmkp0;
uint32_t kpasmkp1;
uint32_t kpasmkp2;
uint32_t kpasmkp3;
uint32_t kpkdi;
};
static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode)
{
int row, col,rel;
if(!(kp->kpc & KPC_ME)) /* skip if not enabled */
return;
if(kp->kpc & KPC_AS || kp->kpc & KPC_ASACT) {
if(kp->kpc & KPC_AS)
kp->kpc &= ~(KPC_AS);
rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */
keycode &= ~(0x80); /* strip qemu key release bit */
row = kp->map[keycode].row;
col = kp->map[keycode].column;
if(row == -1 || col == -1)
return;
switch (col) {
case 0:
case 1:
if(rel)
kp->kpasmkp0 = ~(0xffffffff);
else
kp->kpasmkp0 |= KPASMKPx_MKC(row,col);
break;
case 2:
case 3:
if(rel)
kp->kpasmkp1 = ~(0xffffffff);
else
kp->kpasmkp1 |= KPASMKPx_MKC(row,col);
break;
case 4:
case 5:
if(rel)
kp->kpasmkp2 = ~(0xffffffff);
else
kp->kpasmkp2 |= KPASMKPx_MKC(row,col);
break;
case 6:
case 7:
if(rel)
kp->kpasmkp3 = ~(0xffffffff);
else
kp->kpasmkp3 |= KPASMKPx_MKC(row,col);
break;
} /* switch */
goto out;
}
return;
out:
if(kp->kpc & KPC_MIE) {
kp->kpc |= KPC_MI;
qemu_irq_raise(kp->irq);
}
return;
}
static uint32_t pxa2xx_keypad_read(void *opaque, target_phys_addr_t offset)
{
PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
uint32_t tmp;
switch (offset) {
case KPC:
tmp = s->kpc;
if(tmp & KPC_MI)
s->kpc &= ~(KPC_MI);
if(tmp & KPC_DI)
s->kpc &= ~(KPC_DI);
qemu_irq_lower(s->irq);
return tmp;
break;
case KPDK:
return s->kpdk;
break;
case KPREC:
tmp = s->kprec;
if(tmp & KPREC_OF1)
s->kprec &= ~(KPREC_OF1);
if(tmp & KPREC_UF1)
s->kprec &= ~(KPREC_UF1);
if(tmp & KPREC_OF0)
s->kprec &= ~(KPREC_OF0);
if(tmp & KPREC_UF0)
s->kprec &= ~(KPREC_UF0);
return tmp;
break;
case KPMK:
tmp = s->kpmk;
if(tmp & KPMK_MKP)
s->kpmk &= ~(KPMK_MKP);
return tmp;
break;
case KPAS:
return s->kpas;
break;
case KPASMKP0:
return s->kpasmkp0;
break;
case KPASMKP1:
return s->kpasmkp1;
break;
case KPASMKP2:
return s->kpasmkp2;
break;
case KPASMKP3:
return s->kpasmkp3;
break;
case KPKDI:
return s->kpkdi;
break;
default:
hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
}
return 0;
}
static void pxa2xx_keypad_write(void *opaque,
target_phys_addr_t offset, uint32_t value)
{
PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
switch (offset) {
case KPC:
s->kpc = value;
break;
case KPDK:
s->kpdk = value;
break;
case KPREC:
s->kprec = value;
break;
case KPMK:
s->kpmk = value;
break;
case KPAS:
s->kpas = value;
break;
case KPASMKP0:
s->kpasmkp0 = value;
break;
case KPASMKP1:
s->kpasmkp1 = value;
break;
case KPASMKP2:
s->kpasmkp2 = value;
break;
case KPASMKP3:
s->kpasmkp3 = value;
break;
case KPKDI:
s->kpkdi = value;
break;
default:
hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
}
}
static CPUReadMemoryFunc * const pxa2xx_keypad_readfn[] = {
pxa2xx_keypad_read,
pxa2xx_keypad_read,
pxa2xx_keypad_read
};
static CPUWriteMemoryFunc * const pxa2xx_keypad_writefn[] = {
pxa2xx_keypad_write,
pxa2xx_keypad_write,
pxa2xx_keypad_write
};
static void pxa2xx_keypad_save(QEMUFile *f, void *opaque)
{
PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
qemu_put_be32s(f, &s->kpc);
qemu_put_be32s(f, &s->kpdk);
qemu_put_be32s(f, &s->kprec);
qemu_put_be32s(f, &s->kpmk);
qemu_put_be32s(f, &s->kpas);
qemu_put_be32s(f, &s->kpasmkp0);
qemu_put_be32s(f, &s->kpasmkp1);
qemu_put_be32s(f, &s->kpasmkp2);
qemu_put_be32s(f, &s->kpasmkp3);
qemu_put_be32s(f, &s->kpkdi);
}
static int pxa2xx_keypad_load(QEMUFile *f, void *opaque, int version_id)
{
PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
qemu_get_be32s(f, &s->kpc);
qemu_get_be32s(f, &s->kpdk);
qemu_get_be32s(f, &s->kprec);
qemu_get_be32s(f, &s->kpmk);
qemu_get_be32s(f, &s->kpas);
qemu_get_be32s(f, &s->kpasmkp0);
qemu_get_be32s(f, &s->kpasmkp1);
qemu_get_be32s(f, &s->kpasmkp2);
qemu_get_be32s(f, &s->kpasmkp3);
qemu_get_be32s(f, &s->kpkdi);
return 0;
}
PXA2xxKeyPadState *pxa27x_keypad_init(target_phys_addr_t base,
qemu_irq irq)
{
int iomemtype;
PXA2xxKeyPadState *s;
s = (PXA2xxKeyPadState *) qemu_mallocz(sizeof(PXA2xxKeyPadState));
s->irq = irq;
iomemtype = cpu_register_io_memory(pxa2xx_keypad_readfn,
pxa2xx_keypad_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, 0x00100000, iomemtype);
register_savevm(NULL, "pxa2xx_keypad", 0, 0,
pxa2xx_keypad_save, pxa2xx_keypad_load, s);
return s;
}
void pxa27x_register_keypad(PXA2xxKeyPadState *kp, struct keymap *map,
int size)
{
if(!map || size < 0x80) {
fprintf(stderr, "%s - No PXA keypad map defined\n", __FUNCTION__);
exit(-1);
}
kp->map = map;
qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp);
}