root / hw / milkymist-softusb.c @ fe55ff6e
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1 | 87a381ec | Michael Walle | /*
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2 | 87a381ec | Michael Walle | * QEMU model of the Milkymist SoftUSB block.
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3 | 87a381ec | Michael Walle | *
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4 | 87a381ec | Michael Walle | * Copyright (c) 2010 Michael Walle <michael@walle.cc>
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5 | 87a381ec | Michael Walle | *
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6 | 87a381ec | Michael Walle | * This library is free software; you can redistribute it and/or
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7 | 87a381ec | Michael Walle | * modify it under the terms of the GNU Lesser General Public
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8 | 87a381ec | Michael Walle | * License as published by the Free Software Foundation; either
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9 | 87a381ec | Michael Walle | * version 2 of the License, or (at your option) any later version.
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10 | 87a381ec | Michael Walle | *
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11 | 87a381ec | Michael Walle | * This library is distributed in the hope that it will be useful,
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12 | 87a381ec | Michael Walle | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 87a381ec | Michael Walle | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 87a381ec | Michael Walle | * Lesser General Public License for more details.
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15 | 87a381ec | Michael Walle | *
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16 | 87a381ec | Michael Walle | * You should have received a copy of the GNU Lesser General Public
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17 | 87a381ec | Michael Walle | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
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18 | 87a381ec | Michael Walle | *
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19 | 87a381ec | Michael Walle | *
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20 | 87a381ec | Michael Walle | * Specification available at:
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21 | 87a381ec | Michael Walle | * not available yet
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22 | 87a381ec | Michael Walle | */
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23 | 87a381ec | Michael Walle | |
24 | 87a381ec | Michael Walle | #include "hw.h" |
25 | 87a381ec | Michael Walle | #include "sysbus.h" |
26 | 87a381ec | Michael Walle | #include "trace.h" |
27 | 87a381ec | Michael Walle | #include "console.h" |
28 | 4c15ba9c | Michael Walle | #include "hid.h" |
29 | 87a381ec | Michael Walle | #include "qemu-error.h" |
30 | 87a381ec | Michael Walle | |
31 | 87a381ec | Michael Walle | enum {
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32 | 87a381ec | Michael Walle | R_CTRL = 0,
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33 | 87a381ec | Michael Walle | R_MAX |
34 | 87a381ec | Michael Walle | }; |
35 | 87a381ec | Michael Walle | |
36 | 87a381ec | Michael Walle | enum {
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37 | 87a381ec | Michael Walle | CTRL_RESET = (1<<0), |
38 | 87a381ec | Michael Walle | }; |
39 | 87a381ec | Michael Walle | |
40 | 87a381ec | Michael Walle | #define COMLOC_DEBUG_PRODUCE 0x1000 |
41 | 87a381ec | Michael Walle | #define COMLOC_DEBUG_BASE 0x1001 |
42 | 87a381ec | Michael Walle | #define COMLOC_MEVT_PRODUCE 0x1101 |
43 | 87a381ec | Michael Walle | #define COMLOC_MEVT_BASE 0x1102 |
44 | 87a381ec | Michael Walle | #define COMLOC_KEVT_PRODUCE 0x1142 |
45 | 87a381ec | Michael Walle | #define COMLOC_KEVT_BASE 0x1143 |
46 | 87a381ec | Michael Walle | |
47 | 87a381ec | Michael Walle | struct MilkymistSoftUsbState {
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48 | 87a381ec | Michael Walle | SysBusDevice busdev; |
49 | 4c15ba9c | Michael Walle | HIDState hid_kbd; |
50 | 4c15ba9c | Michael Walle | HIDState hid_mouse; |
51 | 87a381ec | Michael Walle | |
52 | 87a381ec | Michael Walle | qemu_irq irq; |
53 | 87a381ec | Michael Walle | |
54 | 87a381ec | Michael Walle | /* device properties */
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55 | 87a381ec | Michael Walle | uint32_t pmem_base; |
56 | 87a381ec | Michael Walle | uint32_t pmem_size; |
57 | 87a381ec | Michael Walle | uint32_t dmem_base; |
58 | 87a381ec | Michael Walle | uint32_t dmem_size; |
59 | 87a381ec | Michael Walle | |
60 | 87a381ec | Michael Walle | /* device registers */
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61 | 87a381ec | Michael Walle | uint32_t regs[R_MAX]; |
62 | 87a381ec | Michael Walle | |
63 | 87a381ec | Michael Walle | /* mouse state */
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64 | 4c15ba9c | Michael Walle | uint8_t mouse_hid_buffer[4];
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65 | 87a381ec | Michael Walle | |
66 | 87a381ec | Michael Walle | /* keyboard state */
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67 | 4c15ba9c | Michael Walle | uint8_t kbd_hid_buffer[8];
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68 | 87a381ec | Michael Walle | }; |
69 | 87a381ec | Michael Walle | typedef struct MilkymistSoftUsbState MilkymistSoftUsbState; |
70 | 87a381ec | Michael Walle | |
71 | 87a381ec | Michael Walle | static uint32_t softusb_read(void *opaque, target_phys_addr_t addr) |
72 | 87a381ec | Michael Walle | { |
73 | 87a381ec | Michael Walle | MilkymistSoftUsbState *s = opaque; |
74 | 87a381ec | Michael Walle | uint32_t r = 0;
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75 | 87a381ec | Michael Walle | |
76 | 87a381ec | Michael Walle | addr >>= 2;
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77 | 87a381ec | Michael Walle | switch (addr) {
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78 | 87a381ec | Michael Walle | case R_CTRL:
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79 | 87a381ec | Michael Walle | r = s->regs[addr]; |
80 | 87a381ec | Michael Walle | break;
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81 | 87a381ec | Michael Walle | |
82 | 87a381ec | Michael Walle | default:
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83 | 87a381ec | Michael Walle | error_report("milkymist_softusb: read access to unknown register 0x"
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84 | 87a381ec | Michael Walle | TARGET_FMT_plx, addr << 2);
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85 | 87a381ec | Michael Walle | break;
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86 | 87a381ec | Michael Walle | } |
87 | 87a381ec | Michael Walle | |
88 | 87a381ec | Michael Walle | trace_milkymist_softusb_memory_read(addr << 2, r);
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89 | 87a381ec | Michael Walle | |
90 | 87a381ec | Michael Walle | return r;
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91 | 87a381ec | Michael Walle | } |
92 | 87a381ec | Michael Walle | |
93 | 87a381ec | Michael Walle | static void |
94 | 87a381ec | Michael Walle | softusb_write(void *opaque, target_phys_addr_t addr, uint32_t value)
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95 | 87a381ec | Michael Walle | { |
96 | 87a381ec | Michael Walle | MilkymistSoftUsbState *s = opaque; |
97 | 87a381ec | Michael Walle | |
98 | 87a381ec | Michael Walle | trace_milkymist_softusb_memory_write(addr, value); |
99 | 87a381ec | Michael Walle | |
100 | 87a381ec | Michael Walle | addr >>= 2;
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101 | 87a381ec | Michael Walle | switch (addr) {
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102 | 87a381ec | Michael Walle | case R_CTRL:
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103 | 87a381ec | Michael Walle | s->regs[addr] = value; |
104 | 87a381ec | Michael Walle | break;
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105 | 87a381ec | Michael Walle | |
106 | 87a381ec | Michael Walle | default:
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107 | 87a381ec | Michael Walle | error_report("milkymist_softusb: write access to unknown register 0x"
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108 | 87a381ec | Michael Walle | TARGET_FMT_plx, addr << 2);
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109 | 87a381ec | Michael Walle | break;
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110 | 87a381ec | Michael Walle | } |
111 | 87a381ec | Michael Walle | } |
112 | 87a381ec | Michael Walle | |
113 | 87a381ec | Michael Walle | static CPUReadMemoryFunc * const softusb_read_fn[] = { |
114 | 87a381ec | Michael Walle | NULL,
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115 | 87a381ec | Michael Walle | NULL,
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116 | 87a381ec | Michael Walle | &softusb_read, |
117 | 87a381ec | Michael Walle | }; |
118 | 87a381ec | Michael Walle | |
119 | 87a381ec | Michael Walle | static CPUWriteMemoryFunc * const softusb_write_fn[] = { |
120 | 87a381ec | Michael Walle | NULL,
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121 | 87a381ec | Michael Walle | NULL,
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122 | 87a381ec | Michael Walle | &softusb_write, |
123 | 87a381ec | Michael Walle | }; |
124 | 87a381ec | Michael Walle | |
125 | 87a381ec | Michael Walle | static inline void softusb_read_dmem(MilkymistSoftUsbState *s, |
126 | 87a381ec | Michael Walle | uint32_t offset, uint8_t *buf, uint32_t len) |
127 | 87a381ec | Michael Walle | { |
128 | 87a381ec | Michael Walle | if (offset + len >= s->dmem_size) {
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129 | 87a381ec | Michael Walle | error_report("milkymist_softusb: read dmem out of bounds "
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130 | 6daf194d | Markus Armbruster | "at offset 0x%x, len %d", offset, len);
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131 | 87a381ec | Michael Walle | return;
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132 | 87a381ec | Michael Walle | } |
133 | 87a381ec | Michael Walle | |
134 | 87a381ec | Michael Walle | cpu_physical_memory_read(s->dmem_base + offset, buf, len); |
135 | 87a381ec | Michael Walle | } |
136 | 87a381ec | Michael Walle | |
137 | 87a381ec | Michael Walle | static inline void softusb_write_dmem(MilkymistSoftUsbState *s, |
138 | 87a381ec | Michael Walle | uint32_t offset, uint8_t *buf, uint32_t len) |
139 | 87a381ec | Michael Walle | { |
140 | 87a381ec | Michael Walle | if (offset + len >= s->dmem_size) {
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141 | 87a381ec | Michael Walle | error_report("milkymist_softusb: write dmem out of bounds "
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142 | 6daf194d | Markus Armbruster | "at offset 0x%x, len %d", offset, len);
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143 | 87a381ec | Michael Walle | return;
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144 | 87a381ec | Michael Walle | } |
145 | 87a381ec | Michael Walle | |
146 | 87a381ec | Michael Walle | cpu_physical_memory_write(s->dmem_base + offset, buf, len); |
147 | 87a381ec | Michael Walle | } |
148 | 87a381ec | Michael Walle | |
149 | 87a381ec | Michael Walle | static inline void softusb_read_pmem(MilkymistSoftUsbState *s, |
150 | 87a381ec | Michael Walle | uint32_t offset, uint8_t *buf, uint32_t len) |
151 | 87a381ec | Michael Walle | { |
152 | 87a381ec | Michael Walle | if (offset + len >= s->pmem_size) {
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153 | 87a381ec | Michael Walle | error_report("milkymist_softusb: read pmem out of bounds "
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154 | 6daf194d | Markus Armbruster | "at offset 0x%x, len %d", offset, len);
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155 | 87a381ec | Michael Walle | return;
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156 | 87a381ec | Michael Walle | } |
157 | 87a381ec | Michael Walle | |
158 | 87a381ec | Michael Walle | cpu_physical_memory_read(s->pmem_base + offset, buf, len); |
159 | 87a381ec | Michael Walle | } |
160 | 87a381ec | Michael Walle | |
161 | 87a381ec | Michael Walle | static inline void softusb_write_pmem(MilkymistSoftUsbState *s, |
162 | 87a381ec | Michael Walle | uint32_t offset, uint8_t *buf, uint32_t len) |
163 | 87a381ec | Michael Walle | { |
164 | 87a381ec | Michael Walle | if (offset + len >= s->pmem_size) {
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165 | 87a381ec | Michael Walle | error_report("milkymist_softusb: write pmem out of bounds "
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166 | 6daf194d | Markus Armbruster | "at offset 0x%x, len %d", offset, len);
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167 | 87a381ec | Michael Walle | return;
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168 | 87a381ec | Michael Walle | } |
169 | 87a381ec | Michael Walle | |
170 | 87a381ec | Michael Walle | cpu_physical_memory_write(s->pmem_base + offset, buf, len); |
171 | 87a381ec | Michael Walle | } |
172 | 87a381ec | Michael Walle | |
173 | 87a381ec | Michael Walle | static void softusb_mouse_changed(MilkymistSoftUsbState *s) |
174 | 87a381ec | Michael Walle | { |
175 | 87a381ec | Michael Walle | uint8_t m; |
176 | 87a381ec | Michael Walle | |
177 | 87a381ec | Michael Walle | softusb_read_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1);
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178 | 87a381ec | Michael Walle | trace_milkymist_softusb_mevt(m); |
179 | 4c15ba9c | Michael Walle | softusb_write_dmem(s, COMLOC_MEVT_BASE + 4 * m, s->mouse_hid_buffer, 4); |
180 | 87a381ec | Michael Walle | m = (m + 1) & 0xf; |
181 | 87a381ec | Michael Walle | softusb_write_dmem(s, COMLOC_MEVT_PRODUCE, &m, 1);
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182 | 87a381ec | Michael Walle | |
183 | 87a381ec | Michael Walle | trace_milkymist_softusb_pulse_irq(); |
184 | 87a381ec | Michael Walle | qemu_irq_pulse(s->irq); |
185 | 87a381ec | Michael Walle | } |
186 | 87a381ec | Michael Walle | |
187 | 87a381ec | Michael Walle | static void softusb_kbd_changed(MilkymistSoftUsbState *s) |
188 | 87a381ec | Michael Walle | { |
189 | 87a381ec | Michael Walle | uint8_t m; |
190 | 87a381ec | Michael Walle | |
191 | 87a381ec | Michael Walle | softusb_read_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1);
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192 | 87a381ec | Michael Walle | trace_milkymist_softusb_kevt(m); |
193 | 4c15ba9c | Michael Walle | softusb_write_dmem(s, COMLOC_KEVT_BASE + 8 * m, s->kbd_hid_buffer, 8); |
194 | 87a381ec | Michael Walle | m = (m + 1) & 0x7; |
195 | 87a381ec | Michael Walle | softusb_write_dmem(s, COMLOC_KEVT_PRODUCE, &m, 1);
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196 | 87a381ec | Michael Walle | |
197 | 87a381ec | Michael Walle | trace_milkymist_softusb_pulse_irq(); |
198 | 87a381ec | Michael Walle | qemu_irq_pulse(s->irq); |
199 | 87a381ec | Michael Walle | } |
200 | 87a381ec | Michael Walle | |
201 | 4c15ba9c | Michael Walle | static void softusb_kbd_hid_datain(HIDState *hs) |
202 | 87a381ec | Michael Walle | { |
203 | 4c15ba9c | Michael Walle | MilkymistSoftUsbState *s = container_of(hs, MilkymistSoftUsbState, hid_kbd); |
204 | 4c15ba9c | Michael Walle | int len;
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205 | 87a381ec | Michael Walle | |
206 | 87a381ec | Michael Walle | /* if device is in reset, do nothing */
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207 | 87a381ec | Michael Walle | if (s->regs[R_CTRL] & CTRL_RESET) {
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208 | 87a381ec | Michael Walle | return;
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209 | 87a381ec | Michael Walle | } |
210 | 87a381ec | Michael Walle | |
211 | 4c15ba9c | Michael Walle | len = hid_keyboard_poll(hs, s->kbd_hid_buffer, sizeof(s->kbd_hid_buffer));
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212 | 87a381ec | Michael Walle | |
213 | 4c15ba9c | Michael Walle | if (len == 8) { |
214 | 4c15ba9c | Michael Walle | softusb_kbd_changed(s); |
215 | 4c15ba9c | Michael Walle | } |
216 | 87a381ec | Michael Walle | } |
217 | 87a381ec | Michael Walle | |
218 | 4c15ba9c | Michael Walle | static void softusb_mouse_hid_datain(HIDState *hs) |
219 | 87a381ec | Michael Walle | { |
220 | 4c15ba9c | Michael Walle | MilkymistSoftUsbState *s = |
221 | 4c15ba9c | Michael Walle | container_of(hs, MilkymistSoftUsbState, hid_mouse); |
222 | 4c15ba9c | Michael Walle | int len;
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223 | 87a381ec | Michael Walle | |
224 | 4c15ba9c | Michael Walle | /* if device is in reset, do nothing */
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225 | 4c15ba9c | Michael Walle | if (s->regs[R_CTRL] & CTRL_RESET) {
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226 | 4c15ba9c | Michael Walle | return;
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227 | 4c15ba9c | Michael Walle | } |
228 | 87a381ec | Michael Walle | |
229 | 4c15ba9c | Michael Walle | len = hid_pointer_poll(hs, s->mouse_hid_buffer, |
230 | 4c15ba9c | Michael Walle | sizeof(s->mouse_hid_buffer));
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231 | 4706ab6c | Hans de Goede | |
232 | 4c15ba9c | Michael Walle | if (len == 4) { |
233 | 4c15ba9c | Michael Walle | softusb_mouse_changed(s); |
234 | 4c15ba9c | Michael Walle | } |
235 | 07771f6f | Gerd Hoffmann | } |
236 | 07771f6f | Gerd Hoffmann | |
237 | 87a381ec | Michael Walle | static void milkymist_softusb_reset(DeviceState *d) |
238 | 87a381ec | Michael Walle | { |
239 | 87a381ec | Michael Walle | MilkymistSoftUsbState *s = |
240 | 87a381ec | Michael Walle | container_of(d, MilkymistSoftUsbState, busdev.qdev); |
241 | 87a381ec | Michael Walle | int i;
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242 | 87a381ec | Michael Walle | |
243 | 87a381ec | Michael Walle | for (i = 0; i < R_MAX; i++) { |
244 | 87a381ec | Michael Walle | s->regs[i] = 0;
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245 | 87a381ec | Michael Walle | } |
246 | 4c15ba9c | Michael Walle | memset(s->kbd_hid_buffer, 0, sizeof(s->kbd_hid_buffer)); |
247 | 4c15ba9c | Michael Walle | memset(s->mouse_hid_buffer, 0, sizeof(s->mouse_hid_buffer)); |
248 | 4c15ba9c | Michael Walle | |
249 | 4c15ba9c | Michael Walle | hid_reset(&s->hid_kbd); |
250 | 4c15ba9c | Michael Walle | hid_reset(&s->hid_mouse); |
251 | 87a381ec | Michael Walle | |
252 | 87a381ec | Michael Walle | /* defaults */
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253 | 87a381ec | Michael Walle | s->regs[R_CTRL] = CTRL_RESET; |
254 | 87a381ec | Michael Walle | } |
255 | 87a381ec | Michael Walle | |
256 | 87a381ec | Michael Walle | static int milkymist_softusb_init(SysBusDevice *dev) |
257 | 87a381ec | Michael Walle | { |
258 | 87a381ec | Michael Walle | MilkymistSoftUsbState *s = FROM_SYSBUS(typeof(*s), dev); |
259 | 87a381ec | Michael Walle | int softusb_regs;
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260 | 87a381ec | Michael Walle | ram_addr_t pmem_ram; |
261 | 87a381ec | Michael Walle | ram_addr_t dmem_ram; |
262 | 87a381ec | Michael Walle | |
263 | 87a381ec | Michael Walle | sysbus_init_irq(dev, &s->irq); |
264 | 87a381ec | Michael Walle | |
265 | 87a381ec | Michael Walle | softusb_regs = cpu_register_io_memory(softusb_read_fn, softusb_write_fn, s, |
266 | 87a381ec | Michael Walle | DEVICE_NATIVE_ENDIAN); |
267 | 87a381ec | Michael Walle | sysbus_init_mmio(dev, R_MAX * 4, softusb_regs);
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268 | 87a381ec | Michael Walle | |
269 | 87a381ec | Michael Walle | /* register pmem and dmem */
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270 | 87a381ec | Michael Walle | pmem_ram = qemu_ram_alloc(NULL, "milkymist_softusb.pmem", s->pmem_size); |
271 | 87a381ec | Michael Walle | cpu_register_physical_memory(s->pmem_base, s->pmem_size, |
272 | 87a381ec | Michael Walle | pmem_ram | IO_MEM_RAM); |
273 | 87a381ec | Michael Walle | dmem_ram = qemu_ram_alloc(NULL, "milkymist_softusb.dmem", s->dmem_size); |
274 | 87a381ec | Michael Walle | cpu_register_physical_memory(s->dmem_base, s->dmem_size, |
275 | 87a381ec | Michael Walle | dmem_ram | IO_MEM_RAM); |
276 | 87a381ec | Michael Walle | |
277 | 4c15ba9c | Michael Walle | hid_init(&s->hid_kbd, HID_KEYBOARD, softusb_kbd_hid_datain); |
278 | 4c15ba9c | Michael Walle | hid_init(&s->hid_mouse, HID_MOUSE, softusb_mouse_hid_datain); |
279 | 87a381ec | Michael Walle | |
280 | 87a381ec | Michael Walle | return 0; |
281 | 87a381ec | Michael Walle | } |
282 | 87a381ec | Michael Walle | |
283 | 87a381ec | Michael Walle | static const VMStateDescription vmstate_milkymist_softusb = { |
284 | 87a381ec | Michael Walle | .name = "milkymist-softusb",
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285 | 87a381ec | Michael Walle | .version_id = 1,
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286 | 87a381ec | Michael Walle | .minimum_version_id = 1,
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287 | 87a381ec | Michael Walle | .minimum_version_id_old = 1,
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288 | 87a381ec | Michael Walle | .fields = (VMStateField[]) { |
289 | 87a381ec | Michael Walle | VMSTATE_UINT32_ARRAY(regs, MilkymistSoftUsbState, R_MAX), |
290 | 4c15ba9c | Michael Walle | VMSTATE_HID_KEYBOARD_DEVICE(hid_kbd, MilkymistSoftUsbState), |
291 | 4c15ba9c | Michael Walle | VMSTATE_HID_POINTER_DEVICE(hid_mouse, MilkymistSoftUsbState), |
292 | 4c15ba9c | Michael Walle | VMSTATE_BUFFER(kbd_hid_buffer, MilkymistSoftUsbState), |
293 | 4c15ba9c | Michael Walle | VMSTATE_BUFFER(mouse_hid_buffer, MilkymistSoftUsbState), |
294 | 87a381ec | Michael Walle | VMSTATE_END_OF_LIST() |
295 | 87a381ec | Michael Walle | } |
296 | 87a381ec | Michael Walle | }; |
297 | 87a381ec | Michael Walle | |
298 | 87a381ec | Michael Walle | static SysBusDeviceInfo milkymist_softusb_info = {
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299 | 87a381ec | Michael Walle | .init = milkymist_softusb_init, |
300 | 87a381ec | Michael Walle | .qdev.name = "milkymist-softusb",
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301 | 87a381ec | Michael Walle | .qdev.size = sizeof(MilkymistSoftUsbState),
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302 | 87a381ec | Michael Walle | .qdev.vmsd = &vmstate_milkymist_softusb, |
303 | 87a381ec | Michael Walle | .qdev.reset = milkymist_softusb_reset, |
304 | 87a381ec | Michael Walle | .qdev.props = (Property[]) { |
305 | 87a381ec | Michael Walle | DEFINE_PROP_UINT32( |
306 | 87a381ec | Michael Walle | "pmem_base", MilkymistSoftUsbState, pmem_base, 0xa0000000 |
307 | 87a381ec | Michael Walle | ), |
308 | 87a381ec | Michael Walle | DEFINE_PROP_UINT32( |
309 | 87a381ec | Michael Walle | "pmem_size", MilkymistSoftUsbState, pmem_size, 0x00001000 |
310 | 87a381ec | Michael Walle | ), |
311 | 87a381ec | Michael Walle | DEFINE_PROP_UINT32( |
312 | 87a381ec | Michael Walle | "dmem_base", MilkymistSoftUsbState, dmem_base, 0xa0020000 |
313 | 87a381ec | Michael Walle | ), |
314 | 87a381ec | Michael Walle | DEFINE_PROP_UINT32( |
315 | 87a381ec | Michael Walle | "dmem_size", MilkymistSoftUsbState, dmem_size, 0x00002000 |
316 | 87a381ec | Michael Walle | ), |
317 | 87a381ec | Michael Walle | DEFINE_PROP_END_OF_LIST(), |
318 | 87a381ec | Michael Walle | } |
319 | 87a381ec | Michael Walle | }; |
320 | 87a381ec | Michael Walle | |
321 | 87a381ec | Michael Walle | static void milkymist_softusb_register(void) |
322 | 87a381ec | Michael Walle | { |
323 | 87a381ec | Michael Walle | sysbus_register_withprop(&milkymist_softusb_info); |
324 | 87a381ec | Michael Walle | } |
325 | 87a381ec | Michael Walle | |
326 | 87a381ec | Michael Walle | device_init(milkymist_softusb_register) |