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87a381ec MW |
1 | /* |
2 | * QEMU model of the Milkymist SoftUSB block. | |
3 | * | |
4 | * Copyright (c) 2010 Michael Walle <[email protected]> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | * | |
19 | * | |
20 | * Specification available at: | |
21 | * not available yet | |
22 | */ | |
23 | ||
24 | #include "hw.h" | |
25 | #include "sysbus.h" | |
26 | #include "trace.h" | |
28ecbaee | 27 | #include "ui/console.h" |
4c15ba9c | 28 | #include "hid.h" |
87a381ec MW |
29 | #include "qemu-error.h" |
30 | ||
31 | enum { | |
32 | R_CTRL = 0, | |
33 | R_MAX | |
34 | }; | |
35 | ||
36 | enum { | |
37 | CTRL_RESET = (1<<0), | |
38 | }; | |
39 | ||
40 | #define COMLOC_DEBUG_PRODUCE 0x1000 | |
41 | #define COMLOC_DEBUG_BASE 0x1001 | |
42 | #define COMLOC_MEVT_PRODUCE 0x1101 | |
43 | #define COMLOC_MEVT_BASE 0x1102 | |
44 | #define COMLOC_KEVT_PRODUCE 0x1142 | |
45 | #define COMLOC_KEVT_BASE 0x1143 | |
46 | ||
47 | struct MilkymistSoftUsbState { | |
48 | SysBusDevice busdev; | |
4c15ba9c MW |
49 | HIDState hid_kbd; |
50 | HIDState hid_mouse; | |
87a381ec | 51 | |
5105ed3b AK |
52 | MemoryRegion regs_region; |
53 | MemoryRegion pmem; | |
54 | MemoryRegion dmem; | |
87a381ec MW |
55 | qemu_irq irq; |
56 | ||
57 | /* device properties */ | |
58 | uint32_t pmem_base; | |
59 | uint32_t pmem_size; | |
60 | uint32_t dmem_base; | |
61 | uint32_t dmem_size; | |
62 | ||
63 | /* device registers */ | |
64 | uint32_t regs[R_MAX]; | |
65 | ||
66 | /* mouse state */ | |
4c15ba9c | 67 | uint8_t mouse_hid_buffer[4]; |
87a381ec MW |
68 | |
69 | /* keyboard state */ | |
4c15ba9c | 70 | uint8_t kbd_hid_buffer[8]; |
87a381ec MW |
71 | }; |
72 | typedef struct MilkymistSoftUsbState MilkymistSoftUsbState; | |
73 | ||
a8170e5e | 74 | static uint64_t softusb_read(void *opaque, hwaddr addr, |
5105ed3b | 75 | unsigned size) |
87a381ec MW |
76 | { |
77 | MilkymistSoftUsbState *s = opaque; | |
78 | uint32_t r = 0; | |
79 | ||
80 | addr >>= 2; | |
81 | switch (addr) { | |
82 | case R_CTRL: | |
83 | r = s->regs[addr]; | |
84 | break; | |
85 | ||
86 | default: | |
87 | error_report("milkymist_softusb: read access to unknown register 0x" | |
88 | TARGET_FMT_plx, addr << 2); | |
89 | break; | |
90 | } | |
91 | ||
92 | trace_milkymist_softusb_memory_read(addr << 2, r); | |
93 | ||
94 | return r; | |
95 | } | |
96 | ||
97 | static void | |
a8170e5e | 98 | softusb_write(void *opaque, hwaddr addr, uint64_t value, |
5105ed3b | 99 | unsigned size) |
87a381ec MW |
100 | { |
101 | MilkymistSoftUsbState *s = opaque; | |
102 | ||
103 | trace_milkymist_softusb_memory_write(addr, value); | |
104 | ||
105 | addr >>= 2; | |
106 | switch (addr) { | |
107 | case R_CTRL: | |
108 | s->regs[addr] = value; | |
109 | break; | |
110 | ||
111 | default: | |
112 | error_report("milkymist_softusb: write access to unknown register 0x" | |
113 | TARGET_FMT_plx, addr << 2); | |
114 | break; | |
115 | } | |
116 | } | |
117 | ||
5105ed3b AK |
118 | static const MemoryRegionOps softusb_mmio_ops = { |
119 | .read = softusb_read, | |
120 | .write = softusb_write, | |
121 | .endianness = DEVICE_NATIVE_ENDIAN, | |
122 | .valid = { | |
123 | .min_access_size = 4, | |
124 | .max_access_size = 4, | |
125 | }, | |
87a381ec MW |
126 | }; |
127 | ||
128 | static inline void softusb_read_dmem(MilkymistSoftUsbState *s, | |
129 | uint32_t offset, uint8_t *buf, uint32_t len) | |
130 | { | |
131 | if (offset + len >= s->dmem_size) { | |
132 | error_report("milkymist_softusb: read dmem out of bounds " | |
6daf194d | 133 | "at offset 0x%x, len %d", offset, len); |
87a381ec MW |
134 | return; |
135 | } | |
136 | ||
137 | cpu_physical_memory_read(s->dmem_base + offset, buf, len); | |
138 | } | |
139 | ||
140 | static inline void softusb_write_dmem(MilkymistSoftUsbState *s, | |
141 | uint32_t offset, uint8_t *buf, uint32_t len) | |
142 | { | |
143 | if (offset + len >= s->dmem_size) { | |
144 | error_report("milkymist_softusb: write dmem out of bounds " | |
6daf194d | 145 | "at offset 0x%x, len %d", offset, len); |
87a381ec MW |
146 | return; |
147 | } | |
148 | ||
149 | cpu_physical_memory_write(s->dmem_base + offset, buf, len); | |
150 | } | |
151 | ||
152 | static inline void softusb_read_pmem(MilkymistSoftUsbState *s, | |
153 | uint32_t offset, uint8_t *buf, uint32_t len) | |
154 | { | |
155 | if (offset + len >= s->pmem_size) { | |
156 | error_report("milkymist_softusb: read pmem out of bounds " | |
6daf194d | 157 | "at offset 0x%x, len %d", offset, len); |
87a381ec MW |
158 | return; |
159 | } | |
160 | ||
161 | cpu_physical_memory_read(s->pmem_base + offset, buf, len); | |
162 | } | |
163 | ||
164 | static inline void softusb_write_pmem(MilkymistSoftUsbState *s, | |
165 | uint32_t offset, uint8_t *buf, uint32_t len) | |
166 | { | |
167 | if (offset + len >= s->pmem_size) { | |
168 | error_report("milkymist_softusb: write pmem out of bounds " | |
6daf194d | 169 | "at offset 0x%x, len %d", offset, len); |
87a381ec MW |
170 | return; |
171 | } | |
172 | ||
173 | cpu_physical_memory_write(s->pmem_base + offset, buf, len); | |
174 | } | |
175 | ||
176 | static void softusb_mouse_changed(MilkymistSoftUsbState *s) | |
177 | { | |
178 | uint8_t m; | |
87a381ec MW |
179 | |
180 | softusb_read_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1); | |
181 | trace_milkymist_softusb_mevt(m); | |
4c15ba9c | 182 | softusb_write_dmem(s, COMLOC_MEVT_BASE + 4 * m, s->mouse_hid_buffer, 4); |
87a381ec MW |
183 | m = (m + 1) & 0xf; |
184 | softusb_write_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1); | |
185 | ||
186 | trace_milkymist_softusb_pulse_irq(); | |
187 | qemu_irq_pulse(s->irq); | |
188 | } | |
189 | ||
190 | static void softusb_kbd_changed(MilkymistSoftUsbState *s) | |
191 | { | |
192 | uint8_t m; | |
193 | ||
194 | softusb_read_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1); | |
195 | trace_milkymist_softusb_kevt(m); | |
4c15ba9c | 196 | softusb_write_dmem(s, COMLOC_KEVT_BASE + 8 * m, s->kbd_hid_buffer, 8); |
87a381ec MW |
197 | m = (m + 1) & 0x7; |
198 | softusb_write_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1); | |
199 | ||
200 | trace_milkymist_softusb_pulse_irq(); | |
201 | qemu_irq_pulse(s->irq); | |
202 | } | |
203 | ||
4c15ba9c | 204 | static void softusb_kbd_hid_datain(HIDState *hs) |
87a381ec | 205 | { |
4c15ba9c MW |
206 | MilkymistSoftUsbState *s = container_of(hs, MilkymistSoftUsbState, hid_kbd); |
207 | int len; | |
87a381ec MW |
208 | |
209 | /* if device is in reset, do nothing */ | |
210 | if (s->regs[R_CTRL] & CTRL_RESET) { | |
211 | return; | |
212 | } | |
213 | ||
4c15ba9c | 214 | len = hid_keyboard_poll(hs, s->kbd_hid_buffer, sizeof(s->kbd_hid_buffer)); |
87a381ec | 215 | |
4c15ba9c MW |
216 | if (len == 8) { |
217 | softusb_kbd_changed(s); | |
218 | } | |
87a381ec MW |
219 | } |
220 | ||
4c15ba9c | 221 | static void softusb_mouse_hid_datain(HIDState *hs) |
87a381ec | 222 | { |
4c15ba9c MW |
223 | MilkymistSoftUsbState *s = |
224 | container_of(hs, MilkymistSoftUsbState, hid_mouse); | |
225 | int len; | |
87a381ec | 226 | |
4c15ba9c MW |
227 | /* if device is in reset, do nothing */ |
228 | if (s->regs[R_CTRL] & CTRL_RESET) { | |
229 | return; | |
230 | } | |
87a381ec | 231 | |
4c15ba9c MW |
232 | len = hid_pointer_poll(hs, s->mouse_hid_buffer, |
233 | sizeof(s->mouse_hid_buffer)); | |
4706ab6c | 234 | |
4c15ba9c MW |
235 | if (len == 4) { |
236 | softusb_mouse_changed(s); | |
237 | } | |
07771f6f GH |
238 | } |
239 | ||
87a381ec MW |
240 | static void milkymist_softusb_reset(DeviceState *d) |
241 | { | |
242 | MilkymistSoftUsbState *s = | |
243 | container_of(d, MilkymistSoftUsbState, busdev.qdev); | |
244 | int i; | |
245 | ||
246 | for (i = 0; i < R_MAX; i++) { | |
247 | s->regs[i] = 0; | |
248 | } | |
4c15ba9c MW |
249 | memset(s->kbd_hid_buffer, 0, sizeof(s->kbd_hid_buffer)); |
250 | memset(s->mouse_hid_buffer, 0, sizeof(s->mouse_hid_buffer)); | |
251 | ||
252 | hid_reset(&s->hid_kbd); | |
253 | hid_reset(&s->hid_mouse); | |
87a381ec MW |
254 | |
255 | /* defaults */ | |
256 | s->regs[R_CTRL] = CTRL_RESET; | |
257 | } | |
258 | ||
259 | static int milkymist_softusb_init(SysBusDevice *dev) | |
260 | { | |
261 | MilkymistSoftUsbState *s = FROM_SYSBUS(typeof(*s), dev); | |
87a381ec MW |
262 | |
263 | sysbus_init_irq(dev, &s->irq); | |
264 | ||
5105ed3b AK |
265 | memory_region_init_io(&s->regs_region, &softusb_mmio_ops, s, |
266 | "milkymist-softusb", R_MAX * 4); | |
750ecd44 | 267 | sysbus_init_mmio(dev, &s->regs_region); |
87a381ec MW |
268 | |
269 | /* register pmem and dmem */ | |
c5705a77 | 270 | memory_region_init_ram(&s->pmem, "milkymist-softusb.pmem", |
5105ed3b | 271 | s->pmem_size); |
c5705a77 | 272 | vmstate_register_ram_global(&s->pmem); |
5105ed3b | 273 | sysbus_add_memory(dev, s->pmem_base, &s->pmem); |
c5705a77 | 274 | memory_region_init_ram(&s->dmem, "milkymist-softusb.dmem", |
5105ed3b | 275 | s->dmem_size); |
c5705a77 | 276 | vmstate_register_ram_global(&s->dmem); |
5105ed3b | 277 | sysbus_add_memory(dev, s->dmem_base, &s->dmem); |
87a381ec | 278 | |
4c15ba9c MW |
279 | hid_init(&s->hid_kbd, HID_KEYBOARD, softusb_kbd_hid_datain); |
280 | hid_init(&s->hid_mouse, HID_MOUSE, softusb_mouse_hid_datain); | |
87a381ec MW |
281 | |
282 | return 0; | |
283 | } | |
284 | ||
285 | static const VMStateDescription vmstate_milkymist_softusb = { | |
286 | .name = "milkymist-softusb", | |
287 | .version_id = 1, | |
288 | .minimum_version_id = 1, | |
289 | .minimum_version_id_old = 1, | |
290 | .fields = (VMStateField[]) { | |
291 | VMSTATE_UINT32_ARRAY(regs, MilkymistSoftUsbState, R_MAX), | |
4c15ba9c MW |
292 | VMSTATE_HID_KEYBOARD_DEVICE(hid_kbd, MilkymistSoftUsbState), |
293 | VMSTATE_HID_POINTER_DEVICE(hid_mouse, MilkymistSoftUsbState), | |
294 | VMSTATE_BUFFER(kbd_hid_buffer, MilkymistSoftUsbState), | |
295 | VMSTATE_BUFFER(mouse_hid_buffer, MilkymistSoftUsbState), | |
87a381ec MW |
296 | VMSTATE_END_OF_LIST() |
297 | } | |
298 | }; | |
299 | ||
999e12bb AL |
300 | static Property milkymist_softusb_properties[] = { |
301 | DEFINE_PROP_UINT32("pmem_base", MilkymistSoftUsbState, pmem_base, 0xa0000000), | |
302 | DEFINE_PROP_UINT32("pmem_size", MilkymistSoftUsbState, pmem_size, 0x00001000), | |
303 | DEFINE_PROP_UINT32("dmem_base", MilkymistSoftUsbState, dmem_base, 0xa0020000), | |
304 | DEFINE_PROP_UINT32("dmem_size", MilkymistSoftUsbState, dmem_size, 0x00002000), | |
305 | DEFINE_PROP_END_OF_LIST(), | |
306 | }; | |
307 | ||
308 | static void milkymist_softusb_class_init(ObjectClass *klass, void *data) | |
309 | { | |
39bffca2 | 310 | DeviceClass *dc = DEVICE_CLASS(klass); |
999e12bb AL |
311 | SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); |
312 | ||
313 | k->init = milkymist_softusb_init; | |
39bffca2 AL |
314 | dc->reset = milkymist_softusb_reset; |
315 | dc->vmsd = &vmstate_milkymist_softusb; | |
316 | dc->props = milkymist_softusb_properties; | |
999e12bb AL |
317 | } |
318 | ||
39bffca2 AL |
319 | static TypeInfo milkymist_softusb_info = { |
320 | .name = "milkymist-softusb", | |
321 | .parent = TYPE_SYS_BUS_DEVICE, | |
322 | .instance_size = sizeof(MilkymistSoftUsbState), | |
323 | .class_init = milkymist_softusb_class_init, | |
87a381ec MW |
324 | }; |
325 | ||
83f7d43a | 326 | static void milkymist_softusb_register_types(void) |
87a381ec | 327 | { |
39bffca2 | 328 | type_register_static(&milkymist_softusb_info); |
87a381ec MW |
329 | } |
330 | ||
83f7d43a | 331 | type_init(milkymist_softusb_register_types) |