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/irq.h" |
17 | #include "migration/vmstate.h" |
18 | #include "hw/arm/pxa.h" |
19 | #include "ui/console.h" |
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 | |
88 | struct PXA2xxKeyPadState { |
89 | MemoryRegion iomem; |
90 | qemu_irq irq; |
91 | const struct keymap *map; |
92 | int pressed_cnt; |
93 | int alt_code; |
94 | |
95 | uint32_t kpc; |
96 | uint32_t kpdk; |
97 | uint32_t kprec; |
98 | uint32_t kpmk; |
99 | uint32_t kpas; |
100 | uint32_t kpasmkp[4]; |
101 | uint32_t kpkdi; |
102 | }; |
103 | |
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 | |
122 | static void pxa27x_keyboard_event (PXA2xxKeyPadState *kp, int keycode) |
123 | { |
124 | int row, col, rel, assert_irq = 0; |
125 | uint32_t val; |
126 | |
127 | if (keycode == 0xe0) { |
128 | kp->alt_code = 1; |
129 | return; |
130 | } |
131 | |
132 | if(!(kp->kpc & KPC_ME)) /* skip if not enabled */ |
133 | return; |
134 | |
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 | } |
141 | |
142 | row = kp->map[keycode].row; |
143 | col = kp->map[keycode].column; |
144 | if (row == -1 || col == -1) { |
145 | return; |
146 | } |
147 | |
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; |
154 | } |
155 | } else { |
156 | if (!(kp->kpasmkp[col / 2] & val)) { |
157 | kp->kpasmkp[col / 2] |= val; |
158 | kp->pressed_cnt++; |
159 | assert_irq = 1; |
160 | } |
161 | } |
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 | |
171 | if (!(kp->kpc & (KPC_AS | KPC_ASACT))) |
172 | assert_irq = 0; |
173 | |
174 | if (assert_irq && (kp->kpc & KPC_MIE)) { |
175 | kp->kpc |= KPC_MI; |
176 | qemu_irq_raise(kp->irq); |
177 | } |
178 | } |
179 | |
180 | static uint64_t pxa2xx_keypad_read(void *opaque, hwaddr offset, |
181 | unsigned size) |
182 | { |
183 | PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque; |
184 | uint32_t tmp; |
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; |
195 | break; |
196 | case KPDK: |
197 | return s->kpdk; |
198 | break; |
199 | case KPREC: |
200 | tmp = s->kprec; |
201 | if(tmp & KPREC_OF1) |
202 | s->kprec &= ~(KPREC_OF1); |
203 | if(tmp & KPREC_UF1) |
204 | s->kprec &= ~(KPREC_UF1); |
205 | if(tmp & KPREC_OF0) |
206 | s->kprec &= ~(KPREC_OF0); |
207 | if(tmp & KPREC_UF0) |
208 | s->kprec &= ~(KPREC_UF0); |
209 | return tmp; |
210 | break; |
211 | case KPMK: |
212 | tmp = s->kpmk; |
213 | if(tmp & KPMK_MKP) |
214 | s->kpmk &= ~(KPMK_MKP); |
215 | return tmp; |
216 | break; |
217 | case KPAS: |
218 | return s->kpas; |
219 | break; |
220 | case KPASMKP0: |
221 | return s->kpasmkp[0]; |
222 | break; |
223 | case KPASMKP1: |
224 | return s->kpasmkp[1]; |
225 | break; |
226 | case KPASMKP2: |
227 | return s->kpasmkp[2]; |
228 | break; |
229 | case KPASMKP3: |
230 | return s->kpasmkp[3]; |
231 | break; |
232 | case KPKDI: |
233 | return s->kpkdi; |
234 | break; |
235 | default: |
236 | hw_error("%s: Bad offset " REG_FMT "\n" , __func__, offset); |
237 | } |
238 | |
239 | return 0; |
240 | } |
241 | |
242 | static void pxa2xx_keypad_write(void *opaque, hwaddr offset, |
243 | uint64_t value, unsigned size) |
244 | { |
245 | PXA2xxKeyPadState *s = (PXA2xxKeyPadState *) opaque; |
246 | |
247 | switch (offset) { |
248 | case KPC: |
249 | s->kpc = value; |
250 | if (s->kpc & KPC_AS) { |
251 | s->kpc &= ~(KPC_AS); |
252 | } |
253 | break; |
254 | case KPDK: |
255 | s->kpdk = value; |
256 | break; |
257 | case KPREC: |
258 | s->kprec = value; |
259 | break; |
260 | case KPMK: |
261 | s->kpmk = value; |
262 | break; |
263 | case KPAS: |
264 | s->kpas = value; |
265 | break; |
266 | case KPASMKP0: |
267 | s->kpasmkp[0] = value; |
268 | break; |
269 | case KPASMKP1: |
270 | s->kpasmkp[1] = value; |
271 | break; |
272 | case KPASMKP2: |
273 | s->kpasmkp[2] = value; |
274 | break; |
275 | case KPASMKP3: |
276 | s->kpasmkp[3] = value; |
277 | break; |
278 | case KPKDI: |
279 | s->kpkdi = value; |
280 | break; |
281 | |
282 | default: |
283 | hw_error("%s: Bad offset " REG_FMT "\n" , __func__, offset); |
284 | } |
285 | } |
286 | |
287 | static const MemoryRegionOps pxa2xx_keypad_ops = { |
288 | .read = pxa2xx_keypad_read, |
289 | .write = pxa2xx_keypad_write, |
290 | .endianness = DEVICE_NATIVE_ENDIAN, |
291 | }; |
292 | |
293 | static const VMStateDescription vmstate_pxa2xx_keypad = { |
294 | .name = "pxa2xx_keypad" , |
295 | .version_id = 0, |
296 | .minimum_version_id = 0, |
297 | .fields = (VMStateField[]) { |
298 | VMSTATE_UINT32(kpc, PXA2xxKeyPadState), |
299 | VMSTATE_UINT32(kpdk, PXA2xxKeyPadState), |
300 | VMSTATE_UINT32(kprec, PXA2xxKeyPadState), |
301 | VMSTATE_UINT32(kpmk, PXA2xxKeyPadState), |
302 | VMSTATE_UINT32(kpas, PXA2xxKeyPadState), |
303 | VMSTATE_UINT32_ARRAY(kpasmkp, PXA2xxKeyPadState, 4), |
304 | VMSTATE_UINT32(kpkdi, PXA2xxKeyPadState), |
305 | VMSTATE_END_OF_LIST() |
306 | } |
307 | }; |
308 | |
309 | PXA2xxKeyPadState *pxa27x_keypad_init(MemoryRegion *sysmem, |
310 | hwaddr base, |
311 | qemu_irq irq) |
312 | { |
313 | PXA2xxKeyPadState *s; |
314 | |
315 | s = (PXA2xxKeyPadState *) g_malloc0(sizeof(PXA2xxKeyPadState)); |
316 | s->irq = irq; |
317 | |
318 | memory_region_init_io(&s->iomem, NULL, &pxa2xx_keypad_ops, s, |
319 | "pxa2xx-keypad" , 0x00100000); |
320 | memory_region_add_subregion(sysmem, base, &s->iomem); |
321 | |
322 | vmstate_register(NULL, 0, &vmstate_pxa2xx_keypad, s); |
323 | |
324 | return s; |
325 | } |
326 | |
327 | void pxa27x_register_keypad(PXA2xxKeyPadState *kp, |
328 | const struct keymap *map, int size) |
329 | { |
330 | if(!map || size < 0x80) { |
331 | fprintf(stderr, "%s - No PXA keypad map defined\n" , __func__); |
332 | exit(-1); |
333 | } |
334 | |
335 | kp->map = map; |
336 | qemu_add_kbd_event_handler((QEMUPutKBDEvent *) pxa27x_keyboard_event, kp); |
337 | } |
338 | |