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Commit | Line | Data |
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31b87f2e AZ |
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. | |
6b620ca3 PB |
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. | |
31b87f2e AZ |
12 | */ |
13 | ||
8ef94f0b | 14 | #include "qemu/osdep.h" |
3a37f239 | 15 | #include "qemu/log.h" |
64552b6b | 16 | #include "hw/irq.h" |
d6454270 | 17 | #include "migration/vmstate.h" |
0d09e41a | 18 | #include "hw/arm/pxa.h" |
28ecbaee | 19 | #include "ui/console.h" |
31b87f2e AZ |
20 | |
21 | /* | |
22 | * Keypad | |
23 | */ | |
24 | #define KPC 0x00 /* Keypad Interface Control register */ | |
25 | #define KPDK 0x08 /* Keypad Interface Direct Key register */ | |
26 | #define KPREC 0x10 /* Keypad Interface Rotary Encoder register */ | |
27 | #define KPMK 0x18 /* Keypad Interface Matrix Key register */ | |
28 | #define KPAS 0x20 /* Keypad Interface Automatic Scan register */ | |
29 | #define KPASMKP0 0x28 /* Keypad Interface Automatic Scan Multiple | |
30 | Key Presser register 0 */ | |
31 | #define KPASMKP1 0x30 /* Keypad Interface Automatic Scan Multiple | |
32 | Key Presser register 1 */ | |
33 | #define KPASMKP2 0x38 /* Keypad Interface Automatic Scan Multiple | |
34 | Key Presser register 2 */ | |
35 | #define KPASMKP3 0x40 /* Keypad Interface Automatic Scan Multiple | |
36 | Key Presser register 3 */ | |
37 | #define KPKDI 0x48 /* Keypad Interface Key Debounce Interval | |
38 | register */ | |
39 | ||
40 | /* Keypad defines */ | |
41 | #define KPC_AS (0x1 << 30) /* Automatic Scan bit */ | |
42 | #define KPC_ASACT (0x1 << 29) /* Automatic Scan on Activity */ | |
43 | #define KPC_MI (0x1 << 22) /* Matrix interrupt bit */ | |
44 | #define KPC_IMKP (0x1 << 21) /* Ignore Multiple Key Press */ | |
45 | #define KPC_MS7 (0x1 << 20) /* Matrix scan line 7 */ | |
46 | #define KPC_MS6 (0x1 << 19) /* Matrix scan line 6 */ | |
47 | #define KPC_MS5 (0x1 << 18) /* Matrix scan line 5 */ | |
48 | #define KPC_MS4 (0x1 << 17) /* Matrix scan line 4 */ | |
49 | #define KPC_MS3 (0x1 << 16) /* Matrix scan line 3 */ | |
50 | #define KPC_MS2 (0x1 << 15) /* Matrix scan line 2 */ | |
51 | #define KPC_MS1 (0x1 << 14) /* Matrix scan line 1 */ | |
52 | #define KPC_MS0 (0x1 << 13) /* Matrix scan line 0 */ | |
53 | #define KPC_ME (0x1 << 12) /* Matrix Keypad Enable */ | |
54 | #define KPC_MIE (0x1 << 11) /* Matrix Interrupt Enable */ | |
55 | #define KPC_DK_DEB_SEL (0x1 << 9) /* Direct Keypad Debounce Select */ | |
56 | #define KPC_DI (0x1 << 5) /* Direct key interrupt bit */ | |
57 | #define KPC_RE_ZERO_DEB (0x1 << 4) /* Rotary Encoder Zero Debounce */ | |
58 | #define KPC_REE1 (0x1 << 3) /* Rotary Encoder1 Enable */ | |
59 | #define KPC_REE0 (0x1 << 2) /* Rotary Encoder0 Enable */ | |
60 | #define KPC_DE (0x1 << 1) /* Direct Keypad Enable */ | |
61 | #define KPC_DIE (0x1 << 0) /* Direct Keypad interrupt Enable */ | |
62 | ||
63 | #define KPDK_DKP (0x1 << 31) | |
64 | #define KPDK_DK7 (0x1 << 7) | |
65 | #define KPDK_DK6 (0x1 << 6) | |
66 | #define KPDK_DK5 (0x1 << 5) | |
67 | #define KPDK_DK4 (0x1 << 4) | |
68 | #define KPDK_DK3 (0x1 << 3) | |
69 | #define KPDK_DK2 (0x1 << 2) | |
70 | #define KPDK_DK1 (0x1 << 1) | |
71 | #define KPDK_DK0 (0x1 << 0) | |
72 | ||
73 | #define KPREC_OF1 (0x1 << 31) | |
74 | #define KPREC_UF1 (0x1 << 30) | |
75 | #define KPREC_OF0 (0x1 << 15) | |
76 | #define KPREC_UF0 (0x1 << 14) | |
77 | ||
78 | #define KPMK_MKP (0x1 << 31) | |
79 | #define KPAS_SO (0x1 << 31) | |
80 | #define KPASMKPx_SO (0x1 << 31) | |
81 | ||
82 | ||
83 | #define KPASMKPx_MKC(row, col) (1 << (row + 16 * (col % 2))) | |
84 | ||
85 | #define PXAKBD_MAXROW 8 | |
86 | #define PXAKBD_MAXCOL 8 | |
87 | ||
bc24a225 | 88 | struct PXA2xxKeyPadState { |
6cd816b8 | 89 | MemoryRegion iomem; |
31b87f2e | 90 | qemu_irq irq; |
52975c31 | 91 | const struct keymap *map; |
b976b4c0 | 92 | int pressed_cnt; |
582798b5 | 93 | int alt_code; |
31b87f2e AZ |
94 | |
95 | uint32_t kpc; | |
96 | uint32_t kpdk; | |
97 | uint32_t kprec; | |
98 | uint32_t kpmk; | |
99 | uint32_t kpas; | |
b976b4c0 | 100 | uint32_t kpasmkp[4]; |
31b87f2e AZ |
101 | uint32_t kpkdi; |
102 | }; | |
103 | ||
b976b4c0 VK |
104 | static void pxa27x_keypad_find_pressed_key(PXA2xxKeyPadState *kp, int *row, int *col) |
105 | { | |
106 | int i; | |
107 | for (i = 0; i < 4; i++) | |
108 | { | |
109 | *col = i * 2; | |
110 | for (*row = 0; *row < 8; (*row)++) { | |
111 | if (kp->kpasmkp[i] & (1 << *row)) | |
112 | return; | |
113 | } | |
114 | *col = i * 2 + 1; | |
115 | for (*row = 0; *row < 8; (*row)++) { | |
116 | if (kp->kpasmkp[i] & (1 << (*row + 16))) | |
117 | return; | |
118 | } | |
119 | } | |
120 | } | |
121 | ||
bc24a225 | 122 | static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode) |
31b87f2e | 123 | { |
b976b4c0 VK |
124 | int row, col, rel, assert_irq = 0; |
125 | uint32_t val; | |
31b87f2e | 126 | |
582798b5 VK |
127 | if (keycode == 0xe0) { |
128 | kp->alt_code = 1; | |
129 | return; | |
130 | } | |
131 | ||
31b87f2e AZ |
132 | if(!(kp->kpc & KPC_ME)) /* skip if not enabled */ |
133 | return; | |
134 | ||
753a97c6 VK |
135 | rel = (keycode & 0x80) ? 1 : 0; /* key release from qemu */ |
136 | keycode &= ~0x80; /* strip qemu key release bit */ | |
137 | if (kp->alt_code) { | |
138 | keycode |= 0x80; | |
139 | kp->alt_code = 0; | |
140 | } | |
b976b4c0 | 141 | |
753a97c6 VK |
142 | row = kp->map[keycode].row; |
143 | col = kp->map[keycode].column; | |
144 | if (row == -1 || col == -1) { | |
145 | return; | |
146 | } | |
b976b4c0 | 147 | |
753a97c6 VK |
148 | val = KPASMKPx_MKC(row, col); |
149 | if (rel) { | |
150 | if (kp->kpasmkp[col / 2] & val) { | |
151 | kp->kpasmkp[col / 2] &= ~val; | |
152 | kp->pressed_cnt--; | |
153 | assert_irq = 1; | |
b976b4c0 | 154 | } |
753a97c6 VK |
155 | } else { |
156 | if (!(kp->kpasmkp[col / 2] & val)) { | |
157 | kp->kpasmkp[col / 2] |= val; | |
158 | kp->pressed_cnt++; | |
159 | assert_irq = 1; | |
b976b4c0 | 160 | } |
31b87f2e | 161 | } |
753a97c6 VK |
162 | kp->kpas = ((kp->pressed_cnt & 0x1f) << 26) | (0xf << 4) | 0xf; |
163 | if (kp->pressed_cnt == 1) { | |
164 | kp->kpas &= ~((0xf << 4) | 0xf); | |
165 | if (rel) { | |
166 | pxa27x_keypad_find_pressed_key(kp, &row, &col); | |
167 | } | |
168 | kp->kpas |= ((row & 0xf) << 4) | (col & 0xf); | |
169 | } | |
170 | ||
8c4ec5c0 | 171 | if (!(kp->kpc & (KPC_AS | KPC_ASACT))) |
753a97c6 | 172 | assert_irq = 0; |
31b87f2e | 173 | |
b976b4c0 | 174 | if (assert_irq && (kp->kpc & KPC_MIE)) { |
31b87f2e AZ |
175 | kp->kpc |= KPC_MI; |
176 | qemu_irq_raise(kp->irq); | |
177 | } | |
31b87f2e AZ |
178 | } |
179 | ||
a8170e5e | 180 | static uint64_t pxa2xx_keypad_read(void *opaque, hwaddr offset, |
6cd816b8 | 181 | unsigned size) |
31b87f2e | 182 | { |
bc24a225 | 183 | PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque; |
31b87f2e | 184 | uint32_t tmp; |
31b87f2e AZ |
185 | |
186 | switch (offset) { | |
187 | case KPC: | |
188 | tmp = s->kpc; | |
189 | if(tmp & KPC_MI) | |
190 | s->kpc &= ~(KPC_MI); | |
191 | if(tmp & KPC_DI) | |
192 | s->kpc &= ~(KPC_DI); | |
193 | qemu_irq_lower(s->irq); | |
194 | return tmp; | |
31b87f2e AZ |
195 | case KPDK: |
196 | return s->kpdk; | |
31b87f2e AZ |
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; | |
31b87f2e AZ |
208 | case KPMK: |
209 | tmp = s->kpmk; | |
210 | if(tmp & KPMK_MKP) | |
211 | s->kpmk &= ~(KPMK_MKP); | |
212 | return tmp; | |
31b87f2e AZ |
213 | case KPAS: |
214 | return s->kpas; | |
31b87f2e | 215 | case KPASMKP0: |
b976b4c0 | 216 | return s->kpasmkp[0]; |
31b87f2e | 217 | case KPASMKP1: |
b976b4c0 | 218 | return s->kpasmkp[1]; |
31b87f2e | 219 | case KPASMKP2: |
b976b4c0 | 220 | return s->kpasmkp[2]; |
31b87f2e | 221 | case KPASMKP3: |
b976b4c0 | 222 | return s->kpasmkp[3]; |
31b87f2e AZ |
223 | case KPKDI: |
224 | return s->kpkdi; | |
31b87f2e | 225 | default: |
3a37f239 PMD |
226 | qemu_log_mask(LOG_GUEST_ERROR, |
227 | "%s: Bad read offset 0x%"HWADDR_PRIx"\n", | |
228 | __func__, offset); | |
31b87f2e AZ |
229 | } |
230 | ||
231 | return 0; | |
232 | } | |
233 | ||
a8170e5e | 234 | static void pxa2xx_keypad_write(void *opaque, hwaddr offset, |
6cd816b8 | 235 | uint64_t value, unsigned size) |
31b87f2e | 236 | { |
bc24a225 | 237 | PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque; |
31b87f2e AZ |
238 | |
239 | switch (offset) { | |
240 | case KPC: | |
241 | s->kpc = value; | |
753a97c6 VK |
242 | if (s->kpc & KPC_AS) { |
243 | s->kpc &= ~(KPC_AS); | |
244 | } | |
31b87f2e AZ |
245 | break; |
246 | case KPDK: | |
247 | s->kpdk = value; | |
248 | break; | |
249 | case KPREC: | |
250 | s->kprec = value; | |
251 | break; | |
252 | case KPMK: | |
253 | s->kpmk = value; | |
254 | break; | |
255 | case KPAS: | |
256 | s->kpas = value; | |
257 | break; | |
258 | case KPASMKP0: | |
b976b4c0 | 259 | s->kpasmkp[0] = value; |
31b87f2e AZ |
260 | break; |
261 | case KPASMKP1: | |
b976b4c0 | 262 | s->kpasmkp[1] = value; |
31b87f2e AZ |
263 | break; |
264 | case KPASMKP2: | |
b976b4c0 | 265 | s->kpasmkp[2] = value; |
31b87f2e AZ |
266 | break; |
267 | case KPASMKP3: | |
b976b4c0 | 268 | s->kpasmkp[3] = value; |
31b87f2e AZ |
269 | break; |
270 | case KPKDI: | |
271 | s->kpkdi = value; | |
272 | break; | |
273 | ||
274 | default: | |
3a37f239 PMD |
275 | qemu_log_mask(LOG_GUEST_ERROR, |
276 | "%s: Bad write offset 0x%"HWADDR_PRIx"\n", | |
277 | __func__, offset); | |
31b87f2e AZ |
278 | } |
279 | } | |
280 | ||
6cd816b8 BC |
281 | static const MemoryRegionOps pxa2xx_keypad_ops = { |
282 | .read = pxa2xx_keypad_read, | |
283 | .write = pxa2xx_keypad_write, | |
284 | .endianness = DEVICE_NATIVE_ENDIAN, | |
31b87f2e AZ |
285 | }; |
286 | ||
25f5a1b7 JQ |
287 | static const VMStateDescription vmstate_pxa2xx_keypad = { |
288 | .name = "pxa2xx_keypad", | |
289 | .version_id = 0, | |
290 | .minimum_version_id = 0, | |
af0f07df | 291 | .fields = (const VMStateField[]) { |
25f5a1b7 JQ |
292 | VMSTATE_UINT32(kpc, PXA2xxKeyPadState), |
293 | VMSTATE_UINT32(kpdk, PXA2xxKeyPadState), | |
294 | VMSTATE_UINT32(kprec, PXA2xxKeyPadState), | |
295 | VMSTATE_UINT32(kpmk, PXA2xxKeyPadState), | |
296 | VMSTATE_UINT32(kpas, PXA2xxKeyPadState), | |
297 | VMSTATE_UINT32_ARRAY(kpasmkp, PXA2xxKeyPadState, 4), | |
298 | VMSTATE_UINT32(kpkdi, PXA2xxKeyPadState), | |
299 | VMSTATE_END_OF_LIST() | |
300 | } | |
301 | }; | |
31b87f2e | 302 | |
6cd816b8 | 303 | PXA2xxKeyPadState *pxa27x_keypad_init(MemoryRegion *sysmem, |
a8170e5e | 304 | hwaddr base, |
6cd816b8 | 305 | qemu_irq irq) |
31b87f2e | 306 | { |
bc24a225 | 307 | PXA2xxKeyPadState *s; |
31b87f2e | 308 | |
b21e2380 | 309 | s = g_new0(PXA2xxKeyPadState, 1); |
31b87f2e AZ |
310 | s->irq = irq; |
311 | ||
2c9b15ca | 312 | memory_region_init_io(&s->iomem, NULL, &pxa2xx_keypad_ops, s, |
6cd816b8 BC |
313 | "pxa2xx-keypad", 0x00100000); |
314 | memory_region_add_subregion(sysmem, base, &s->iomem); | |
31b87f2e | 315 | |
25f5a1b7 | 316 | vmstate_register(NULL, 0, &vmstate_pxa2xx_keypad, s); |
31b87f2e AZ |
317 | |
318 | return s; | |
319 | } | |
320 | ||
52975c31 SW |
321 | void pxa27x_register_keypad(PXA2xxKeyPadState *kp, |
322 | const struct keymap *map, int size) | |
31b87f2e | 323 | { |
bd464c2e | 324 | if(!map || size < 0x80) { |
a89f364a | 325 | fprintf(stderr, "%s - No PXA keypad map defined\n", __func__); |
31b87f2e AZ |
326 | exit(-1); |
327 | } | |
328 | ||
329 | kp->map = map; | |
330 | qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp); | |
331 | } |