root / hw / pxa2xx_keypad.c @ 4d5b97da
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/*
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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.h" |
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#include "pxa.h" |
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#include "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, target_phys_addr_t 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, target_phys_addr_t 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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target_phys_addr_t 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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} |