adb: fix read reg 3 byte ordering
[qemu.git] / hw / input / 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 * Contributions after 2012-01-13 are licensed under the terms of the
11 * GNU GPL, version 2 or (at your option) any later version.
12 */
13
14 #include "qemu/osdep.h"
15 #include "hw/hw.h"
16 #include "hw/arm/pxa.h"
17 #include "ui/console.h"
18
19 /*
20 * Keypad
21 */
22 #define KPC 0x00 /* Keypad Interface Control register */
23 #define KPDK 0x08 /* Keypad Interface Direct Key register */
24 #define KPREC 0x10 /* Keypad Interface Rotary Encoder register */
25 #define KPMK 0x18 /* Keypad Interface Matrix Key register */
26 #define KPAS 0x20 /* Keypad Interface Automatic Scan register */
27 #define KPASMKP0 0x28 /* Keypad Interface Automatic Scan Multiple
28 Key Presser register 0 */
29 #define KPASMKP1 0x30 /* Keypad Interface Automatic Scan Multiple
30 Key Presser register 1 */
31 #define KPASMKP2 0x38 /* Keypad Interface Automatic Scan Multiple
32 Key Presser register 2 */
33 #define KPASMKP3 0x40 /* Keypad Interface Automatic Scan Multiple
34 Key Presser register 3 */
35 #define KPKDI 0x48 /* Keypad Interface Key Debounce Interval
36 register */
37
38 /* Keypad defines */
39 #define KPC_AS (0x1 << 30) /* Automatic Scan bit */
40 #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */
41 #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */
42 #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */
43 #define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */
44 #define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */
45 #define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */
46 #define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */
47 #define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */
48 #define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */
49 #define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */
50 #define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */
51 #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */
52 #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */
53 #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */
54 #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */
55 #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */
56 #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */
57 #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */
58 #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */
59 #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */
60
61 #define KPDK_DKP (0x1 << 31)
62 #define KPDK_DK7 (0x1 << 7)
63 #define KPDK_DK6 (0x1 << 6)
64 #define KPDK_DK5 (0x1 << 5)
65 #define KPDK_DK4 (0x1 << 4)
66 #define KPDK_DK3 (0x1 << 3)
67 #define KPDK_DK2 (0x1 << 2)
68 #define KPDK_DK1 (0x1 << 1)
69 #define KPDK_DK0 (0x1 << 0)
70
71 #define KPREC_OF1 (0x1 << 31)
72 #define KPREC_UF1 (0x1 << 30)
73 #define KPREC_OF0 (0x1 << 15)
74 #define KPREC_UF0 (0x1 << 14)
75
76 #define KPMK_MKP (0x1 << 31)
77 #define KPAS_SO (0x1 << 31)
78 #define KPASMKPx_SO (0x1 << 31)
79
80
81 #define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2)))
82
83 #define PXAKBD_MAXROW 8
84 #define PXAKBD_MAXCOL 8
85
86 struct PXA2xxKeyPadState {
87 MemoryRegion iomem;
88 qemu_irq irq;
89 const struct keymap *map;
90 int pressed_cnt;
91 int alt_code;
92
93 uint32_t kpc;
94 uint32_t kpdk;
95 uint32_t kprec;
96 uint32_t kpmk;
97 uint32_t kpas;
98 uint32_t kpasmkp[4];
99 uint32_t kpkdi;
100 };
101
102 static void pxa27x_keypad_find_pressed_key(PXA2xxKeyPadState *kp, int *row, int *col)
103 {
104 int i;
105 for (i = 0; i < 4; i++)
106 {
107 *col = i * 2;
108 for (*row = 0; *row < 8; (*row)++) {
109 if (kp->kpasmkp[i] & (1 << *row))
110 return;
111 }
112 *col = i * 2 + 1;
113 for (*row = 0; *row < 8; (*row)++) {
114 if (kp->kpasmkp[i] & (1 << (*row + 16)))
115 return;
116 }
117 }
118 }
119
120 static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode)
121 {
122 int row, col, rel, assert_irq = 0;
123 uint32_t val;
124
125 if (keycode == 0xe0) {
126 kp->alt_code = 1;
127 return;
128 }
129
130 if(!(kp->kpc & KPC_ME)) /* skip if not enabled */
131 return;
132
133 rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */
134 keycode &= ~0x80; /* strip qemu key release bit */
135 if (kp->alt_code) {
136 keycode |= 0x80;
137 kp->alt_code = 0;
138 }
139
140 row = kp->map[keycode].row;
141 col = kp->map[keycode].column;
142 if (row == -1 || col == -1) {
143 return;
144 }
145
146 val = KPASMKPx_MKC(row, col);
147 if (rel) {
148 if (kp->kpasmkp[col / 2] & val) {
149 kp->kpasmkp[col / 2] &= ~val;
150 kp->pressed_cnt--;
151 assert_irq = 1;
152 }
153 } else {
154 if (!(kp->kpasmkp[col / 2] & val)) {
155 kp->kpasmkp[col / 2] |= val;
156 kp->pressed_cnt++;
157 assert_irq = 1;
158 }
159 }
160 kp->kpas = ((kp->pressed_cnt & 0x1f) << 26) | (0xf << 4) | 0xf;
161 if (kp->pressed_cnt == 1) {
162 kp->kpas &= ~((0xf << 4) | 0xf);
163 if (rel) {
164 pxa27x_keypad_find_pressed_key(kp, &row, &col);
165 }
166 kp->kpas |= ((row & 0xf) << 4) | (col & 0xf);
167 }
168
169 if (!(kp->kpc & (KPC_AS | KPC_ASACT)))
170 assert_irq = 0;
171
172 if (assert_irq && (kp->kpc & KPC_MIE)) {
173 kp->kpc |= KPC_MI;
174 qemu_irq_raise(kp->irq);
175 }
176 }
177
178 static uint64_t pxa2xx_keypad_read(void *opaque, hwaddr offset,
179 unsigned size)
180 {
181 PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
182 uint32_t tmp;
183
184 switch (offset) {
185 case KPC:
186 tmp = s->kpc;
187 if(tmp & KPC_MI)
188 s->kpc &= ~(KPC_MI);
189 if(tmp & KPC_DI)
190 s->kpc &= ~(KPC_DI);
191 qemu_irq_lower(s->irq);
192 return tmp;
193 break;
194 case KPDK:
195 return s->kpdk;
196 break;
197 case KPREC:
198 tmp = s->kprec;
199 if(tmp & KPREC_OF1)
200 s->kprec &= ~(KPREC_OF1);
201 if(tmp & KPREC_UF1)
202 s->kprec &= ~(KPREC_UF1);
203 if(tmp & KPREC_OF0)
204 s->kprec &= ~(KPREC_OF0);
205 if(tmp & KPREC_UF0)
206 s->kprec &= ~(KPREC_UF0);
207 return tmp;
208 break;
209 case KPMK:
210 tmp = s->kpmk;
211 if(tmp & KPMK_MKP)
212 s->kpmk &= ~(KPMK_MKP);
213 return tmp;
214 break;
215 case KPAS:
216 return s->kpas;
217 break;
218 case KPASMKP0:
219 return s->kpasmkp[0];
220 break;
221 case KPASMKP1:
222 return s->kpasmkp[1];
223 break;
224 case KPASMKP2:
225 return s->kpasmkp[2];
226 break;
227 case KPASMKP3:
228 return s->kpasmkp[3];
229 break;
230 case KPKDI:
231 return s->kpkdi;
232 break;
233 default:
234 hw_error("%s: Bad offset " REG_FMT "\n", __func__, offset);
235 }
236
237 return 0;
238 }
239
240 static void pxa2xx_keypad_write(void *opaque, hwaddr offset,
241 uint64_t value, unsigned size)
242 {
243 PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque;
244
245 switch (offset) {
246 case KPC:
247 s->kpc = value;
248 if (s->kpc & KPC_AS) {
249 s->kpc &= ~(KPC_AS);
250 }
251 break;
252 case KPDK:
253 s->kpdk = value;
254 break;
255 case KPREC:
256 s->kprec = value;
257 break;
258 case KPMK:
259 s->kpmk = value;
260 break;
261 case KPAS:
262 s->kpas = value;
263 break;
264 case KPASMKP0:
265 s->kpasmkp[0] = value;
266 break;
267 case KPASMKP1:
268 s->kpasmkp[1] = value;
269 break;
270 case KPASMKP2:
271 s->kpasmkp[2] = value;
272 break;
273 case KPASMKP3:
274 s->kpasmkp[3] = value;
275 break;
276 case KPKDI:
277 s->kpkdi = value;
278 break;
279
280 default:
281 hw_error("%s: Bad offset " REG_FMT "\n", __func__, offset);
282 }
283 }
284
285 static const MemoryRegionOps pxa2xx_keypad_ops = {
286 .read = pxa2xx_keypad_read,
287 .write = pxa2xx_keypad_write,
288 .endianness = DEVICE_NATIVE_ENDIAN,
289 };
290
291 static const VMStateDescription vmstate_pxa2xx_keypad = {
292 .name = "pxa2xx_keypad",
293 .version_id = 0,
294 .minimum_version_id = 0,
295 .fields = (VMStateField[]) {
296 VMSTATE_UINT32(kpc, PXA2xxKeyPadState),
297 VMSTATE_UINT32(kpdk, PXA2xxKeyPadState),
298 VMSTATE_UINT32(kprec, PXA2xxKeyPadState),
299 VMSTATE_UINT32(kpmk, PXA2xxKeyPadState),
300 VMSTATE_UINT32(kpas, PXA2xxKeyPadState),
301 VMSTATE_UINT32_ARRAY(kpasmkp, PXA2xxKeyPadState, 4),
302 VMSTATE_UINT32(kpkdi, PXA2xxKeyPadState),
303 VMSTATE_END_OF_LIST()
304 }
305 };
306
307 PXA2xxKeyPadState *pxa27x_keypad_init(MemoryRegion *sysmem,
308 hwaddr base,
309 qemu_irq irq)
310 {
311 PXA2xxKeyPadState *s;
312
313 s = (PXA2xxKeyPadState *) g_malloc0(sizeof(PXA2xxKeyPadState));
314 s->irq = irq;
315
316 memory_region_init_io(&s->iomem, NULL, &pxa2xx_keypad_ops, s,
317 "pxa2xx-keypad", 0x00100000);
318 memory_region_add_subregion(sysmem, base, &s->iomem);
319
320 vmstate_register(NULL, 0, &vmstate_pxa2xx_keypad, s);
321
322 return s;
323 }
324
325 void pxa27x_register_keypad(PXA2xxKeyPadState *kp,
326 const struct keymap *map, int size)
327 {
328 if(!map || size < 0x80) {
329 fprintf(stderr, "%s - No PXA keypad map defined\n", __func__);
330 exit(-1);
331 }
332
333 kp->map = map;
334 qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp);
335 }