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CommitLineData
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1/*
2 * Arm PrimeCell PL061 General Purpose IO with additional
3 * Luminary Micro Stellaris bits.
4 *
5 * Copyright (c) 2007 CodeSourcery.
6 * Written by Paul Brook
7 *
8e31bf38 8 * This code is licensed under the GPL.
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9 */
10
83c9f4ca 11#include "hw/sysbus.h"
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12
13//#define DEBUG_PL061 1
14
15#ifdef DEBUG_PL061
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16#define DPRINTF(fmt, ...) \
17do { printf("pl061: " fmt , ## __VA_ARGS__); } while (0)
18#define BADF(fmt, ...) \
19do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
9ee6e8bb 20#else
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21#define DPRINTF(fmt, ...) do {} while(0)
22#define BADF(fmt, ...) \
23do { fprintf(stderr, "pl061: error: " fmt , ## __VA_ARGS__);} while (0)
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24#endif
25
26static const uint8_t pl061_id[12] =
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27 { 0x00, 0x00, 0x00, 0x00, 0x61, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
28static const uint8_t pl061_id_luminary[12] =
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29 { 0x00, 0x00, 0x00, 0x00, 0x61, 0x00, 0x18, 0x01, 0x0d, 0xf0, 0x05, 0xb1 };
30
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31#define TYPE_PL061 "pl061"
32#define PL061(obj) OBJECT_CHECK(PL061State, (obj), TYPE_PL061)
33
ee663e96 34typedef struct PL061State {
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35 SysBusDevice parent_obj;
36
3cf89f8a 37 MemoryRegion iomem;
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38 uint32_t locked;
39 uint32_t data;
40 uint32_t old_data;
41 uint32_t dir;
42 uint32_t isense;
43 uint32_t ibe;
44 uint32_t iev;
45 uint32_t im;
46 uint32_t istate;
47 uint32_t afsel;
48 uint32_t dr2r;
49 uint32_t dr4r;
50 uint32_t dr8r;
51 uint32_t odr;
52 uint32_t pur;
53 uint32_t pdr;
54 uint32_t slr;
55 uint32_t den;
56 uint32_t cr;
57 uint32_t float_high;
b3aaff11 58 uint32_t amsel;
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59 qemu_irq irq;
60 qemu_irq out[8];
7063f49f 61 const unsigned char *id;
ee663e96 62} PL061State;
9ee6e8bb 63
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64static const VMStateDescription vmstate_pl061 = {
65 .name = "pl061",
b3aaff11 66 .version_id = 2,
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67 .minimum_version_id = 1,
68 .fields = (VMStateField[]) {
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69 VMSTATE_UINT32(locked, PL061State),
70 VMSTATE_UINT32(data, PL061State),
71 VMSTATE_UINT32(old_data, PL061State),
72 VMSTATE_UINT32(dir, PL061State),
73 VMSTATE_UINT32(isense, PL061State),
74 VMSTATE_UINT32(ibe, PL061State),
75 VMSTATE_UINT32(iev, PL061State),
76 VMSTATE_UINT32(im, PL061State),
77 VMSTATE_UINT32(istate, PL061State),
78 VMSTATE_UINT32(afsel, PL061State),
79 VMSTATE_UINT32(dr2r, PL061State),
80 VMSTATE_UINT32(dr4r, PL061State),
81 VMSTATE_UINT32(dr8r, PL061State),
82 VMSTATE_UINT32(odr, PL061State),
83 VMSTATE_UINT32(pur, PL061State),
84 VMSTATE_UINT32(pdr, PL061State),
85 VMSTATE_UINT32(slr, PL061State),
86 VMSTATE_UINT32(den, PL061State),
87 VMSTATE_UINT32(cr, PL061State),
88 VMSTATE_UINT32(float_high, PL061State),
89 VMSTATE_UINT32_V(amsel, PL061State, 2),
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90 VMSTATE_END_OF_LIST()
91 }
92};
93
ee663e96 94static void pl061_update(PL061State *s)
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95{
96 uint8_t changed;
97 uint8_t mask;
775616c3 98 uint8_t out;
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99 int i;
100
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101 /* Outputs float high. */
102 /* FIXME: This is board dependent. */
103 out = (s->data & s->dir) | ~s->dir;
104 changed = s->old_data ^ out;
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105 if (!changed)
106 return;
107
775616c3 108 s->old_data = out;
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109 for (i = 0; i < 8; i++) {
110 mask = 1 << i;
b78c2b3a 111 if (changed & mask) {
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112 DPRINTF("Set output %d = %d\n", i, (out & mask) != 0);
113 qemu_set_irq(s->out[i], (out & mask) != 0);
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114 }
115 }
116
117 /* FIXME: Implement input interrupts. */
118}
119
a8170e5e 120static uint64_t pl061_read(void *opaque, hwaddr offset,
3cf89f8a 121 unsigned size)
9ee6e8bb 122{
ee663e96 123 PL061State *s = (PL061State *)opaque;
9ee6e8bb 124
9ee6e8bb 125 if (offset >= 0xfd0 && offset < 0x1000) {
7063f49f 126 return s->id[(offset - 0xfd0) >> 2];
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127 }
128 if (offset < 0x400) {
129 return s->data & (offset >> 2);
130 }
131 switch (offset) {
132 case 0x400: /* Direction */
133 return s->dir;
134 case 0x404: /* Interrupt sense */
135 return s->isense;
136 case 0x408: /* Interrupt both edges */
137 return s->ibe;
ff2712ba 138 case 0x40c: /* Interrupt event */
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139 return s->iev;
140 case 0x410: /* Interrupt mask */
141 return s->im;
142 case 0x414: /* Raw interrupt status */
143 return s->istate;
144 case 0x418: /* Masked interrupt status */
145 return s->istate | s->im;
146 case 0x420: /* Alternate function select */
147 return s->afsel;
148 case 0x500: /* 2mA drive */
149 return s->dr2r;
150 case 0x504: /* 4mA drive */
151 return s->dr4r;
152 case 0x508: /* 8mA drive */
153 return s->dr8r;
154 case 0x50c: /* Open drain */
155 return s->odr;
156 case 0x510: /* Pull-up */
157 return s->pur;
158 case 0x514: /* Pull-down */
159 return s->pdr;
160 case 0x518: /* Slew rate control */
161 return s->slr;
162 case 0x51c: /* Digital enable */
163 return s->den;
164 case 0x520: /* Lock */
165 return s->locked;
166 case 0x524: /* Commit */
167 return s->cr;
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168 case 0x528: /* Analog mode select */
169 return s->amsel;
9ee6e8bb 170 default:
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171 qemu_log_mask(LOG_GUEST_ERROR,
172 "pl061_read: Bad offset %x\n", (int)offset);
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173 return 0;
174 }
175}
176
a8170e5e 177static void pl061_write(void *opaque, hwaddr offset,
3cf89f8a 178 uint64_t value, unsigned size)
9ee6e8bb 179{
ee663e96 180 PL061State *s = (PL061State *)opaque;
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181 uint8_t mask;
182
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183 if (offset < 0x400) {
184 mask = (offset >> 2) & s->dir;
185 s->data = (s->data & ~mask) | (value & mask);
186 pl061_update(s);
187 return;
188 }
189 switch (offset) {
190 case 0x400: /* Direction */
a35faa94 191 s->dir = value & 0xff;
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192 break;
193 case 0x404: /* Interrupt sense */
a35faa94 194 s->isense = value & 0xff;
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195 break;
196 case 0x408: /* Interrupt both edges */
a35faa94 197 s->ibe = value & 0xff;
9ee6e8bb 198 break;
ff2712ba 199 case 0x40c: /* Interrupt event */
a35faa94 200 s->iev = value & 0xff;
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201 break;
202 case 0x410: /* Interrupt mask */
a35faa94 203 s->im = value & 0xff;
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204 break;
205 case 0x41c: /* Interrupt clear */
206 s->istate &= ~value;
207 break;
208 case 0x420: /* Alternate function select */
209 mask = s->cr;
210 s->afsel = (s->afsel & ~mask) | (value & mask);
211 break;
212 case 0x500: /* 2mA drive */
a35faa94 213 s->dr2r = value & 0xff;
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214 break;
215 case 0x504: /* 4mA drive */
a35faa94 216 s->dr4r = value & 0xff;
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217 break;
218 case 0x508: /* 8mA drive */
a35faa94 219 s->dr8r = value & 0xff;
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220 break;
221 case 0x50c: /* Open drain */
a35faa94 222 s->odr = value & 0xff;
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223 break;
224 case 0x510: /* Pull-up */
a35faa94 225 s->pur = value & 0xff;
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226 break;
227 case 0x514: /* Pull-down */
a35faa94 228 s->pdr = value & 0xff;
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229 break;
230 case 0x518: /* Slew rate control */
a35faa94 231 s->slr = value & 0xff;
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232 break;
233 case 0x51c: /* Digital enable */
a35faa94 234 s->den = value & 0xff;
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235 break;
236 case 0x520: /* Lock */
237 s->locked = (value != 0xacce551);
238 break;
239 case 0x524: /* Commit */
240 if (!s->locked)
a35faa94 241 s->cr = value & 0xff;
9ee6e8bb 242 break;
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243 case 0x528:
244 s->amsel = value & 0xff;
245 break;
9ee6e8bb 246 default:
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247 qemu_log_mask(LOG_GUEST_ERROR,
248 "pl061_write: Bad offset %x\n", (int)offset);
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249 }
250 pl061_update(s);
251}
252
ee663e96 253static void pl061_reset(PL061State *s)
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254{
255 s->locked = 1;
256 s->cr = 0xff;
257}
258
9596ebb7 259static void pl061_set_irq(void * opaque, int irq, int level)
9ee6e8bb 260{
ee663e96 261 PL061State *s = (PL061State *)opaque;
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262 uint8_t mask;
263
264 mask = 1 << irq;
265 if ((s->dir & mask) == 0) {
266 s->data &= ~mask;
267 if (level)
268 s->data |= mask;
269 pl061_update(s);
270 }
271}
272
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273static const MemoryRegionOps pl061_ops = {
274 .read = pl061_read,
275 .write = pl061_write,
276 .endianness = DEVICE_NATIVE_ENDIAN,
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277};
278
692a76d1 279static int pl061_initfn(SysBusDevice *sbd)
9ee6e8bb 280{
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281 DeviceState *dev = DEVICE(sbd);
282 PL061State *s = PL061(dev);
283
b7163687 284 memory_region_init_io(&s->iomem, OBJECT(s), &pl061_ops, s, "pl061", 0x1000);
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285 sysbus_init_mmio(sbd, &s->iomem);
286 sysbus_init_irq(sbd, &s->irq);
287 qdev_init_gpio_in(dev, pl061_set_irq, 8);
288 qdev_init_gpio_out(dev, s->out, 8);
9ee6e8bb 289 pl061_reset(s);
81a322d4 290 return 0;
9ee6e8bb 291}
40905a6a 292
692a76d1 293static void pl061_luminary_init(Object *obj)
7063f49f 294{
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295 PL061State *s = PL061(obj);
296
297 s->id = pl061_id_luminary;
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298}
299
692a76d1 300static void pl061_init(Object *obj)
7063f49f 301{
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302 PL061State *s = PL061(obj);
303
304 s->id = pl061_id;
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305}
306
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307static void pl061_class_init(ObjectClass *klass, void *data)
308{
39bffca2 309 DeviceClass *dc = DEVICE_CLASS(klass);
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310 SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
311
692a76d1 312 k->init = pl061_initfn;
39bffca2 313 dc->vmsd = &vmstate_pl061;
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314}
315
8c43a6f0 316static const TypeInfo pl061_info = {
692a76d1 317 .name = TYPE_PL061,
39bffca2 318 .parent = TYPE_SYS_BUS_DEVICE,
ee663e96 319 .instance_size = sizeof(PL061State),
692a76d1 320 .instance_init = pl061_init,
39bffca2 321 .class_init = pl061_class_init,
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322};
323
8c43a6f0 324static const TypeInfo pl061_luminary_info = {
39bffca2 325 .name = "pl061_luminary",
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326 .parent = TYPE_PL061,
327 .instance_init = pl061_luminary_init,
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328};
329
83f7d43a 330static void pl061_register_types(void)
40905a6a 331{
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332 type_register_static(&pl061_info);
333 type_register_static(&pl061_luminary_info);
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334}
335
83f7d43a 336type_init(pl061_register_types)