336 lines
9.6 KiB
C
336 lines
9.6 KiB
C
/*
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* Intel PXA27X Keypad Controller emulation.
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*
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* Copyright (c) 2007 MontaVista Software, Inc
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* Written by Armin Kuster <akuster@kama-aina.net>
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* or <Akuster@mvista.com>
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*
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* This code is licensed under the GPLv2.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "hw/hw.h"
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#include "hw/arm/pxa.h"
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#include "ui/console.h"
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/*
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* Keypad
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*/
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#define KPC 0x00 /* Keypad Interface Control register */
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#define KPDK 0x08 /* Keypad Interface Direct Key register */
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#define KPREC 0x10 /* Keypad Interface Rotary Encoder register */
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#define KPMK 0x18 /* Keypad Interface Matrix Key register */
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#define KPAS 0x20 /* Keypad Interface Automatic Scan register */
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#define KPASMKP0 0x28 /* Keypad Interface Automatic Scan Multiple
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Key Presser register 0 */
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#define KPASMKP1 0x30 /* Keypad Interface Automatic Scan Multiple
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Key Presser register 1 */
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#define KPASMKP2 0x38 /* Keypad Interface Automatic Scan Multiple
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Key Presser register 2 */
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#define KPASMKP3 0x40 /* Keypad Interface Automatic Scan Multiple
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Key Presser register 3 */
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#define KPKDI 0x48 /* Keypad Interface Key Debounce Interval
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register */
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/* Keypad defines */
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#define KPC_AS (0x1 << 30) /* Automatic Scan bit */
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#define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
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#define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
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#define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
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#define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */
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#define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */
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#define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */
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#define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */
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#define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */
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#define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */
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#define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */
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#define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */
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#define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
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#define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
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#define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
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#define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
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#define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
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#define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
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#define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
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#define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
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#define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
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#define KPDK_DKP (0x1 << 31)
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#define KPDK_DK7 (0x1 << 7)
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#define KPDK_DK6 (0x1 << 6)
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#define KPDK_DK5 (0x1 << 5)
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#define KPDK_DK4 (0x1 << 4)
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#define KPDK_DK3 (0x1 << 3)
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#define KPDK_DK2 (0x1 << 2)
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#define KPDK_DK1 (0x1 << 1)
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#define KPDK_DK0 (0x1 << 0)
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#define KPREC_OF1 (0x1 << 31)
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#define KPREC_UF1 (0x1 << 30)
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#define KPREC_OF0 (0x1 << 15)
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#define KPREC_UF0 (0x1 << 14)
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#define KPMK_MKP (0x1 << 31)
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#define KPAS_SO (0x1 << 31)
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#define KPASMKPx_SO (0x1 << 31)
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#define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2)))
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#define PXAKBD_MAXROW 8
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#define PXAKBD_MAXCOL 8
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struct PXA2xxKeyPadState {
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MemoryRegion iomem;
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qemu_irq irq;
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struct keymap *map;
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int pressed_cnt;
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int alt_code;
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uint32_t kpc;
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uint32_t kpdk;
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uint32_t kprec;
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uint32_t kpmk;
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uint32_t kpas;
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uint32_t kpasmkp[4];
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uint32_t kpkdi;
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};
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static void pxa27x_keypad_find_pressed_key(PXA2xxKeyPadState *kp, int *row, int *col)
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{
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int i;
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for (i = 0; i < 4; i++)
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{
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*col = i * 2;
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for (*row = 0; *row < 8; (*row)++) {
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if (kp->kpasmkp[i] & (1 << *row))
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return;
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}
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*col = i * 2 + 1;
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for (*row = 0; *row < 8; (*row)++) {
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if (kp->kpasmkp[i] & (1 << (*row + 16)))
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return;
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}
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}
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}
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static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode)
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{
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int row, col, rel, assert_irq = 0;
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uint32_t val;
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if (keycode == 0xe0) {
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kp->alt_code = 1;
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return;
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}
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if(!(kp->kpc & KPC_ME)) /* skip if not enabled */
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return;
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rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */
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keycode &= ~0x80; /* strip qemu key release bit */
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if (kp->alt_code) {
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keycode |= 0x80;
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kp->alt_code = 0;
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}
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row = kp->map[keycode].row;
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col = kp->map[keycode].column;
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if (row == -1 || col == -1) {
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return;
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}
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val = KPASMKPx_MKC(row, col);
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if (rel) {
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if (kp->kpasmkp[col / 2] & val) {
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kp->kpasmkp[col / 2] &= ~val;
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kp->pressed_cnt--;
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assert_irq = 1;
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}
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} else {
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if (!(kp->kpasmkp[col / 2] & val)) {
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kp->kpasmkp[col / 2] |= val;
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kp->pressed_cnt++;
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assert_irq = 1;
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}
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}
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kp->kpas = ((kp->pressed_cnt & 0x1f) << 26) | (0xf << 4) | 0xf;
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if (kp->pressed_cnt == 1) {
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kp->kpas &= ~((0xf << 4) | 0xf);
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if (rel) {
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pxa27x_keypad_find_pressed_key(kp, &row, &col);
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}
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kp->kpas |= ((row & 0xf) << 4) | (col & 0xf);
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}
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if (!(kp->kpc & (KPC_AS | KPC_ASACT)))
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assert_irq = 0;
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if (assert_irq && (kp->kpc & KPC_MIE)) {
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kp->kpc |= KPC_MI;
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qemu_irq_raise(kp->irq);
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}
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}
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static uint64_t pxa2xx_keypad_read(void *opaque, hwaddr offset,
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unsigned size)
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{
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PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
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uint32_t tmp;
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switch (offset) {
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case KPC:
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tmp = s->kpc;
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if(tmp & KPC_MI)
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s->kpc &= ~(KPC_MI);
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if(tmp & KPC_DI)
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s->kpc &= ~(KPC_DI);
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qemu_irq_lower(s->irq);
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return tmp;
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break;
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case KPDK:
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return s->kpdk;
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break;
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case KPREC:
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tmp = s->kprec;
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if(tmp & KPREC_OF1)
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s->kprec &= ~(KPREC_OF1);
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if(tmp & KPREC_UF1)
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s->kprec &= ~(KPREC_UF1);
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if(tmp & KPREC_OF0)
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s->kprec &= ~(KPREC_OF0);
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if(tmp & KPREC_UF0)
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s->kprec &= ~(KPREC_UF0);
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return tmp;
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break;
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case KPMK:
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tmp = s->kpmk;
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if(tmp & KPMK_MKP)
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s->kpmk &= ~(KPMK_MKP);
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return tmp;
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break;
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case KPAS:
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return s->kpas;
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break;
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case KPASMKP0:
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return s->kpasmkp[0];
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break;
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case KPASMKP1:
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return s->kpasmkp[1];
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break;
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case KPASMKP2:
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return s->kpasmkp[2];
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break;
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case KPASMKP3:
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return s->kpasmkp[3];
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break;
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case KPKDI:
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return s->kpkdi;
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break;
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default:
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hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
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}
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return 0;
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}
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static void pxa2xx_keypad_write(void *opaque, hwaddr offset,
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uint64_t value, unsigned size)
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{
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PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
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switch (offset) {
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case KPC:
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s->kpc = value;
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if (s->kpc & KPC_AS) {
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s->kpc &= ~(KPC_AS);
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}
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break;
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case KPDK:
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s->kpdk = value;
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break;
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case KPREC:
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s->kprec = value;
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break;
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case KPMK:
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s->kpmk = value;
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break;
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case KPAS:
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s->kpas = value;
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break;
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case KPASMKP0:
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s->kpasmkp[0] = value;
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break;
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case KPASMKP1:
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s->kpasmkp[1] = value;
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break;
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case KPASMKP2:
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s->kpasmkp[2] = value;
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break;
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case KPASMKP3:
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s->kpasmkp[3] = value;
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break;
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case KPKDI:
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s->kpkdi = value;
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break;
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default:
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hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
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}
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}
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static const MemoryRegionOps pxa2xx_keypad_ops = {
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.read = pxa2xx_keypad_read,
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.write = pxa2xx_keypad_write,
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.endianness = DEVICE_NATIVE_ENDIAN,
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};
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static const VMStateDescription vmstate_pxa2xx_keypad = {
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.name = "pxa2xx_keypad",
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.version_id = 0,
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.minimum_version_id = 0,
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.minimum_version_id_old = 0,
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.fields = (VMStateField[]) {
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VMSTATE_UINT32(kpc, PXA2xxKeyPadState),
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VMSTATE_UINT32(kpdk, PXA2xxKeyPadState),
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VMSTATE_UINT32(kprec, PXA2xxKeyPadState),
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VMSTATE_UINT32(kpmk, PXA2xxKeyPadState),
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VMSTATE_UINT32(kpas, PXA2xxKeyPadState),
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VMSTATE_UINT32_ARRAY(kpasmkp, PXA2xxKeyPadState, 4),
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VMSTATE_UINT32(kpkdi, PXA2xxKeyPadState),
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VMSTATE_END_OF_LIST()
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}
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};
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PXA2xxKeyPadState *pxa27x_keypad_init(MemoryRegion *sysmem,
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hwaddr base,
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qemu_irq irq)
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{
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PXA2xxKeyPadState *s;
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s = (PXA2xxKeyPadState *) g_malloc0(sizeof(PXA2xxKeyPadState));
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s->irq = irq;
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memory_region_init_io(&s->iomem, &pxa2xx_keypad_ops, s,
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"pxa2xx-keypad", 0x00100000);
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memory_region_add_subregion(sysmem, base, &s->iomem);
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vmstate_register(NULL, 0, &vmstate_pxa2xx_keypad, s);
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return s;
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}
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void pxa27x_register_keypad(PXA2xxKeyPadState *kp, struct keymap *map,
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int size)
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{
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if(!map || size < 0x80) {
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fprintf(stderr, "%s - No PXA keypad map defined\n", __FUNCTION__);
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exit(-1);
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}
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kp->map = map;
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qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp);
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}
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