/* * 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. * * Contributions after 2012-01-13 are licensed under the terms of the * GNU GPL, version 2 or (at your option) any later version. */ #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 { MemoryRegion iomem; qemu_irq irq; struct keymap *map; int pressed_cnt; int alt_code; uint32_t kpc; uint32_t kpdk; uint32_t kprec; uint32_t kpmk; uint32_t kpas; uint32_t kpasmkp[4]; uint32_t kpkdi; }; static void pxa27x_keypad_find_pressed_key(PXA2xxKeyPadState *kp, int *row, int *col) { int i; for (i = 0; i < 4; i++) { *col = i * 2; for (*row = 0; *row < 8; (*row)++) { if (kp->kpasmkp[i] & (1 << *row)) return; } *col = i * 2 + 1; for (*row = 0; *row < 8; (*row)++) { if (kp->kpasmkp[i] & (1 << (*row + 16))) return; } } } static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode) { int row, col, rel, assert_irq = 0; uint32_t val; if (keycode == 0xe0) { kp->alt_code = 1; return; } if(!(kp->kpc & KPC_ME)) /* skip if not enabled */ return; rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */ keycode &= ~0x80; /* strip qemu key release bit */ if (kp->alt_code) { keycode |= 0x80; kp->alt_code = 0; } row = kp->map[keycode].row; col = kp->map[keycode].column; if (row == -1 || col == -1) { return; } val = KPASMKPx_MKC(row, col); if (rel) { if (kp->kpasmkp[col / 2] & val) { kp->kpasmkp[col / 2] &= ~val; kp->pressed_cnt--; assert_irq = 1; } } else { if (!(kp->kpasmkp[col / 2] & val)) { kp->kpasmkp[col / 2] |= val; kp->pressed_cnt++; assert_irq = 1; } } kp->kpas = ((kp->pressed_cnt & 0x1f) << 26) | (0xf << 4) | 0xf; if (kp->pressed_cnt == 1) { kp->kpas &= ~((0xf << 4) | 0xf); if (rel) { pxa27x_keypad_find_pressed_key(kp, &row, &col); } kp->kpas |= ((row & 0xf) << 4) | (col & 0xf); } if (!(kp->kpc & (KPC_AS | KPC_ASACT))) assert_irq = 0; if (assert_irq && (kp->kpc & KPC_MIE)) { kp->kpc |= KPC_MI; qemu_irq_raise(kp->irq); } return; } static uint64_t pxa2xx_keypad_read(void *opaque, target_phys_addr_t offset, unsigned size) { 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->kpasmkp[0]; break; case KPASMKP1: return s->kpasmkp[1]; break; case KPASMKP2: return s->kpasmkp[2]; break; case KPASMKP3: return s->kpasmkp[3]; 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, uint64_t value, unsigned size) { PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque; switch (offset) { case KPC: s->kpc = value; if (s->kpc & KPC_AS) { s->kpc &= ~(KPC_AS); } 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->kpasmkp[0] = value; break; case KPASMKP1: s->kpasmkp[1] = value; break; case KPASMKP2: s->kpasmkp[2] = value; break; case KPASMKP3: s->kpasmkp[3] = value; break; case KPKDI: s->kpkdi = value; break; default: hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset); } } static const MemoryRegionOps pxa2xx_keypad_ops = { .read = pxa2xx_keypad_read, .write = pxa2xx_keypad_write, .endianness = DEVICE_NATIVE_ENDIAN, }; static const VMStateDescription vmstate_pxa2xx_keypad = { .name = "pxa2xx_keypad", .version_id = 0, .minimum_version_id = 0, .minimum_version_id_old = 0, .fields = (VMStateField[]) { VMSTATE_UINT32(kpc, PXA2xxKeyPadState), VMSTATE_UINT32(kpdk, PXA2xxKeyPadState), VMSTATE_UINT32(kprec, PXA2xxKeyPadState), VMSTATE_UINT32(kpmk, PXA2xxKeyPadState), VMSTATE_UINT32(kpas, PXA2xxKeyPadState), VMSTATE_UINT32_ARRAY(kpasmkp, PXA2xxKeyPadState, 4), VMSTATE_UINT32(kpkdi, PXA2xxKeyPadState), VMSTATE_END_OF_LIST() } }; PXA2xxKeyPadState *pxa27x_keypad_init(MemoryRegion *sysmem, target_phys_addr_t base, qemu_irq irq) { PXA2xxKeyPadState *s; s = (PXA2xxKeyPadState *) g_malloc0(sizeof(PXA2xxKeyPadState)); s->irq = irq; memory_region_init_io(&s->iomem, &pxa2xx_keypad_ops, s, "pxa2xx-keypad", 0x00100000); memory_region_add_subregion(sysmem, base, &s->iomem); vmstate_register(NULL, 0, &vmstate_pxa2xx_keypad, 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); }