aboutsummaryrefslogtreecommitdiff
path: root/hw/misc/aspeed_sdmc.c
blob: 25e1e58356035cd8b304998fceb6944563be18b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
/*
 * ASPEED SDRAM Memory Controller
 *
 * Copyright (C) 2016 IBM Corp.
 *
 * This code is licensed under the GPL version 2 or later.  See
 * the COPYING file in the top-level directory.
 */

#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/error-report.h"
#include "hw/misc/aspeed_sdmc.h"
#include "hw/misc/aspeed_scu.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "qapi/error.h"
#include "trace.h"
#include "qemu/units.h"
#include "qemu/cutils.h"
#include "qapi/visitor.h"

/* Protection Key Register */
#define R_PROT            (0x00 / 4)
#define   PROT_UNLOCKED      0x01
#define   PROT_HARDLOCKED    0x10  /* AST2600 */
#define   PROT_SOFTLOCKED    0x00

#define   PROT_KEY_UNLOCK     0xFC600309
#define   PROT_KEY_HARDLOCK   0xDEADDEAD /* AST2600 */

/* Configuration Register */
#define R_CONF            (0x04 / 4)

/* Control/Status Register #1 (ast2500) */
#define R_STATUS1         (0x60 / 4)
#define   PHY_BUSY_STATE      BIT(0)
#define   PHY_PLL_LOCK_STATUS BIT(4)

#define R_ECC_TEST_CTRL   (0x70 / 4)
#define   ECC_TEST_FINISHED   BIT(12)
#define   ECC_TEST_FAIL       BIT(13)

/*
 * Configuration register Ox4 (for Aspeed AST2400 SOC)
 *
 * These are for the record and future use. ASPEED_SDMC_DRAM_SIZE is
 * what we care about right now as it is checked by U-Boot to
 * determine the RAM size.
 */

#define ASPEED_SDMC_RESERVED            0xFFFFF800 /* 31:11 reserved */
#define ASPEED_SDMC_AST2300_COMPAT      (1 << 10)
#define ASPEED_SDMC_SCRAMBLE_PATTERN    (1 << 9)
#define ASPEED_SDMC_DATA_SCRAMBLE       (1 << 8)
#define ASPEED_SDMC_ECC_ENABLE          (1 << 7)
#define ASPEED_SDMC_VGA_COMPAT          (1 << 6) /* readonly */
#define ASPEED_SDMC_DRAM_BANK           (1 << 5)
#define ASPEED_SDMC_DRAM_BURST          (1 << 4)
#define ASPEED_SDMC_VGA_APERTURE(x)     ((x & 0x3) << 2) /* readonly */
#define     ASPEED_SDMC_VGA_8MB             0x0
#define     ASPEED_SDMC_VGA_16MB            0x1
#define     ASPEED_SDMC_VGA_32MB            0x2
#define     ASPEED_SDMC_VGA_64MB            0x3
#define ASPEED_SDMC_DRAM_SIZE(x)        (x & 0x3)
#define     ASPEED_SDMC_DRAM_64MB           0x0
#define     ASPEED_SDMC_DRAM_128MB          0x1
#define     ASPEED_SDMC_DRAM_256MB          0x2
#define     ASPEED_SDMC_DRAM_512MB          0x3

#define ASPEED_SDMC_READONLY_MASK                       \
    (ASPEED_SDMC_RESERVED | ASPEED_SDMC_VGA_COMPAT |    \
     ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))
/*
 * Configuration register Ox4 (for Aspeed AST2500 SOC and higher)
 *
 * Incompatibilities are annotated in the list. ASPEED_SDMC_HW_VERSION
 * should be set to 1 for the AST2500 SOC.
 */
#define ASPEED_SDMC_HW_VERSION(x)       ((x & 0xf) << 28) /* readonly */
#define ASPEED_SDMC_SW_VERSION          ((x & 0xff) << 20)
#define ASPEED_SDMC_CACHE_INITIAL_DONE  (1 << 19)  /* readonly */
#define ASPEED_SDMC_AST2500_RESERVED    0x7C000 /* 18:14 reserved */
#define ASPEED_SDMC_CACHE_DDR4_CONF     (1 << 13)
#define ASPEED_SDMC_CACHE_INITIAL       (1 << 12)
#define ASPEED_SDMC_CACHE_RANGE_CTRL    (1 << 11)
#define ASPEED_SDMC_CACHE_ENABLE        (1 << 10) /* differs from AST2400 */
#define ASPEED_SDMC_DRAM_TYPE           (1 << 4)  /* differs from AST2400 */

/* DRAM size definitions differs */
#define     ASPEED_SDMC_AST2500_128MB       0x0
#define     ASPEED_SDMC_AST2500_256MB       0x1
#define     ASPEED_SDMC_AST2500_512MB       0x2
#define     ASPEED_SDMC_AST2500_1024MB      0x3

#define     ASPEED_SDMC_AST2600_256MB       0x0
#define     ASPEED_SDMC_AST2600_512MB       0x1
#define     ASPEED_SDMC_AST2600_1024MB      0x2
#define     ASPEED_SDMC_AST2600_2048MB      0x3

#define ASPEED_SDMC_AST2500_READONLY_MASK                               \
    (ASPEED_SDMC_HW_VERSION(0xf) | ASPEED_SDMC_CACHE_INITIAL_DONE |     \
     ASPEED_SDMC_AST2500_RESERVED | ASPEED_SDMC_VGA_COMPAT |            \
     ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB))

static uint64_t aspeed_sdmc_read(void *opaque, hwaddr addr, unsigned size)
{
    AspeedSDMCState *s = ASPEED_SDMC(opaque);

    addr >>= 2;

    if (addr >= ARRAY_SIZE(s->regs)) {
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: Out-of-bounds read at offset 0x%" HWADDR_PRIx "\n",
                      __func__, addr);
        return 0;
    }

    return s->regs[addr];
}

static void aspeed_sdmc_write(void *opaque, hwaddr addr, uint64_t data,
                             unsigned int size)
{
    AspeedSDMCState *s = ASPEED_SDMC(opaque);
    AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);

    addr >>= 2;

    if (addr >= ARRAY_SIZE(s->regs)) {
        qemu_log_mask(LOG_GUEST_ERROR,
                      "%s: Out-of-bounds write at offset 0x%" HWADDR_PRIx "\n",
                      __func__, addr);
        return;
    }

    asc->write(s, addr, data);
}

static const MemoryRegionOps aspeed_sdmc_ops = {
    .read = aspeed_sdmc_read,
    .write = aspeed_sdmc_write,
    .endianness = DEVICE_LITTLE_ENDIAN,
    .valid.min_access_size = 4,
    .valid.max_access_size = 4,
};

static int ast2400_rambits(AspeedSDMCState *s)
{
    switch (s->ram_size >> 20) {
    case 64:
        return ASPEED_SDMC_DRAM_64MB;
    case 128:
        return ASPEED_SDMC_DRAM_128MB;
    case 256:
        return ASPEED_SDMC_DRAM_256MB;
    case 512:
        return ASPEED_SDMC_DRAM_512MB;
    default:
        g_assert_not_reached();
        break;
    }
}

static int ast2500_rambits(AspeedSDMCState *s)
{
    switch (s->ram_size >> 20) {
    case 128:
        return ASPEED_SDMC_AST2500_128MB;
    case 256:
        return ASPEED_SDMC_AST2500_256MB;
    case 512:
        return ASPEED_SDMC_AST2500_512MB;
    case 1024:
        return ASPEED_SDMC_AST2500_1024MB;
    default:
        g_assert_not_reached();
        break;
    }
}

static int ast2600_rambits(AspeedSDMCState *s)
{
    switch (s->ram_size >> 20) {
    case 256:
        return ASPEED_SDMC_AST2600_256MB;
    case 512:
        return ASPEED_SDMC_AST2600_512MB;
    case 1024:
        return ASPEED_SDMC_AST2600_1024MB;
    case 2048:
        return ASPEED_SDMC_AST2600_2048MB;
    default:
        g_assert_not_reached();
        break;
    }
}

static void aspeed_sdmc_reset(DeviceState *dev)
{
    AspeedSDMCState *s = ASPEED_SDMC(dev);
    AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);

    memset(s->regs, 0, sizeof(s->regs));

    /* Set ram size bit and defaults values */
    s->regs[R_CONF] = asc->compute_conf(s, 0);
}

static void aspeed_sdmc_get_ram_size(Object *obj, Visitor *v, const char *name,
                                     void *opaque, Error **errp)
{
    AspeedSDMCState *s = ASPEED_SDMC(obj);
    int64_t value = s->ram_size;

    visit_type_int(v, name, &value, errp);
}

static void aspeed_sdmc_set_ram_size(Object *obj, Visitor *v, const char *name,
                                     void *opaque, Error **errp)
{
    int i;
    char *sz;
    int64_t value;
    Error *local_err = NULL;
    AspeedSDMCState *s = ASPEED_SDMC(obj);
    AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);

    visit_type_int(v, name, &value, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        return;
    }

    for (i = 0; asc->valid_ram_sizes[i]; i++) {
        if (value == asc->valid_ram_sizes[i]) {
            s->ram_size = value;
            return;
        }
    }

    sz = size_to_str(value);
    error_setg(&local_err, "Invalid RAM size %s", sz);
    g_free(sz);
    error_propagate(errp, local_err);
}

static void aspeed_sdmc_initfn(Object *obj)
{
    object_property_add(obj, "ram-size", "int",
                        aspeed_sdmc_get_ram_size, aspeed_sdmc_set_ram_size,
                        NULL, NULL);
}

static void aspeed_sdmc_realize(DeviceState *dev, Error **errp)
{
    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
    AspeedSDMCState *s = ASPEED_SDMC(dev);
    AspeedSDMCClass *asc = ASPEED_SDMC_GET_CLASS(s);

    s->max_ram_size = asc->max_ram_size;

    memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_sdmc_ops, s,
                          TYPE_ASPEED_SDMC, 0x1000);
    sysbus_init_mmio(sbd, &s->iomem);
}

static const VMStateDescription vmstate_aspeed_sdmc = {
    .name = "aspeed.sdmc",
    .version_id = 1,
    .minimum_version_id = 1,
    .fields = (VMStateField[]) {
        VMSTATE_UINT32_ARRAY(regs, AspeedSDMCState, ASPEED_SDMC_NR_REGS),
        VMSTATE_END_OF_LIST()
    }
};

static Property aspeed_sdmc_properties[] = {
    DEFINE_PROP_UINT64("max-ram-size", AspeedSDMCState, max_ram_size, 0),
    DEFINE_PROP_END_OF_LIST(),
};

static void aspeed_sdmc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    dc->realize = aspeed_sdmc_realize;
    dc->reset = aspeed_sdmc_reset;
    dc->desc = "ASPEED SDRAM Memory Controller";
    dc->vmsd = &vmstate_aspeed_sdmc;
    device_class_set_props(dc, aspeed_sdmc_properties);
}

static const TypeInfo aspeed_sdmc_info = {
    .name = TYPE_ASPEED_SDMC,
    .parent = TYPE_SYS_BUS_DEVICE,
    .instance_size = sizeof(AspeedSDMCState),
    .instance_init = aspeed_sdmc_initfn,
    .class_init = aspeed_sdmc_class_init,
    .class_size = sizeof(AspeedSDMCClass),
    .abstract   = true,
};

static uint32_t aspeed_2400_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
{
    uint32_t fixed_conf = ASPEED_SDMC_VGA_COMPAT |
        ASPEED_SDMC_DRAM_SIZE(ast2400_rambits(s));

    /* Make sure readonly bits are kept */
    data &= ~ASPEED_SDMC_READONLY_MASK;

    return data | fixed_conf;
}

static void aspeed_2400_sdmc_write(AspeedSDMCState *s, uint32_t reg,
                                   uint32_t data)
{
    if (reg == R_PROT) {
        s->regs[reg] = (data == PROT_KEY_UNLOCK) ? PROT_UNLOCKED : PROT_SOFTLOCKED;
        return;
    }

    if (!s->regs[R_PROT]) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
        return;
    }

    switch (reg) {
    case R_CONF:
        data = aspeed_2400_sdmc_compute_conf(s, data);
        break;
    default:
        break;
    }

    s->regs[reg] = data;
}

static const uint64_t
aspeed_2400_ram_sizes[] = { 64 * MiB, 128 * MiB, 256 * MiB, 512 * MiB, 0};

static void aspeed_2400_sdmc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);

    dc->desc = "ASPEED 2400 SDRAM Memory Controller";
    asc->max_ram_size = 512 << 20;
    asc->compute_conf = aspeed_2400_sdmc_compute_conf;
    asc->write = aspeed_2400_sdmc_write;
    asc->valid_ram_sizes = aspeed_2400_ram_sizes;
}

static const TypeInfo aspeed_2400_sdmc_info = {
    .name = TYPE_ASPEED_2400_SDMC,
    .parent = TYPE_ASPEED_SDMC,
    .class_init = aspeed_2400_sdmc_class_init,
};

static uint32_t aspeed_2500_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
{
    uint32_t fixed_conf = ASPEED_SDMC_HW_VERSION(1) |
        ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) |
        ASPEED_SDMC_CACHE_INITIAL_DONE |
        ASPEED_SDMC_DRAM_SIZE(ast2500_rambits(s));

    /* Make sure readonly bits are kept */
    data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;

    return data | fixed_conf;
}

static void aspeed_2500_sdmc_write(AspeedSDMCState *s, uint32_t reg,
                                   uint32_t data)
{
    if (reg == R_PROT) {
        s->regs[reg] = (data == PROT_KEY_UNLOCK) ? PROT_UNLOCKED : PROT_SOFTLOCKED;
        return;
    }

    if (!s->regs[R_PROT]) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
        return;
    }

    switch (reg) {
    case R_CONF:
        data = aspeed_2500_sdmc_compute_conf(s, data);
        break;
    case R_STATUS1:
        /* Will never return 'busy' */
        data &= ~PHY_BUSY_STATE;
        break;
    case R_ECC_TEST_CTRL:
        /* Always done, always happy */
        data |= ECC_TEST_FINISHED;
        data &= ~ECC_TEST_FAIL;
        break;
    default:
        break;
    }

    s->regs[reg] = data;
}

static const uint64_t
aspeed_2500_ram_sizes[] = { 128 * MiB, 256 * MiB, 512 * MiB, 1024 * MiB, 0};

static void aspeed_2500_sdmc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);

    dc->desc = "ASPEED 2500 SDRAM Memory Controller";
    asc->max_ram_size = 1024 << 20;
    asc->compute_conf = aspeed_2500_sdmc_compute_conf;
    asc->write = aspeed_2500_sdmc_write;
    asc->valid_ram_sizes = aspeed_2500_ram_sizes;
}

static const TypeInfo aspeed_2500_sdmc_info = {
    .name = TYPE_ASPEED_2500_SDMC,
    .parent = TYPE_ASPEED_SDMC,
    .class_init = aspeed_2500_sdmc_class_init,
};

static uint32_t aspeed_2600_sdmc_compute_conf(AspeedSDMCState *s, uint32_t data)
{
    uint32_t fixed_conf = ASPEED_SDMC_HW_VERSION(3) |
        ASPEED_SDMC_VGA_APERTURE(ASPEED_SDMC_VGA_64MB) |
        ASPEED_SDMC_DRAM_SIZE(ast2600_rambits(s));

    /* Make sure readonly bits are kept (use ast2500 mask) */
    data &= ~ASPEED_SDMC_AST2500_READONLY_MASK;

    return data | fixed_conf;
}

static void aspeed_2600_sdmc_write(AspeedSDMCState *s, uint32_t reg,
                                   uint32_t data)
{
    if (s->regs[R_PROT] == PROT_HARDLOCKED) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked until system reset!\n",
                __func__);
        return;
    }

    if (reg != R_PROT && s->regs[R_PROT] == PROT_SOFTLOCKED) {
        qemu_log_mask(LOG_GUEST_ERROR, "%s: SDMC is locked!\n", __func__);
        return;
    }

    switch (reg) {
    case R_PROT:
        if (data == PROT_KEY_UNLOCK)  {
            data = PROT_UNLOCKED;
        } else if (data == PROT_KEY_HARDLOCK) {
            data = PROT_HARDLOCKED;
        } else {
            data = PROT_SOFTLOCKED;
        }
        break;
    case R_CONF:
        data = aspeed_2600_sdmc_compute_conf(s, data);
        break;
    case R_STATUS1:
        /* Will never return 'busy'. 'lock status' is always set */
        data &= ~PHY_BUSY_STATE;
        data |= PHY_PLL_LOCK_STATUS;
        break;
    case R_ECC_TEST_CTRL:
        /* Always done, always happy */
        data |= ECC_TEST_FINISHED;
        data &= ~ECC_TEST_FAIL;
        break;
    default:
        break;
    }

    s->regs[reg] = data;
}

static const uint64_t
aspeed_2600_ram_sizes[] = { 256 * MiB, 512 * MiB, 1024 * MiB, 2048 * MiB, 0};

static void aspeed_2600_sdmc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AspeedSDMCClass *asc = ASPEED_SDMC_CLASS(klass);

    dc->desc = "ASPEED 2600 SDRAM Memory Controller";
    asc->max_ram_size = 2048 << 20;
    asc->compute_conf = aspeed_2600_sdmc_compute_conf;
    asc->write = aspeed_2600_sdmc_write;
    asc->valid_ram_sizes = aspeed_2600_ram_sizes;
}

static const TypeInfo aspeed_2600_sdmc_info = {
    .name = TYPE_ASPEED_2600_SDMC,
    .parent = TYPE_ASPEED_SDMC,
    .class_init = aspeed_2600_sdmc_class_init,
};

static void aspeed_sdmc_register_types(void)
{
    type_register_static(&aspeed_sdmc_info);
    type_register_static(&aspeed_2400_sdmc_info);
    type_register_static(&aspeed_2500_sdmc_info);
    type_register_static(&aspeed_2600_sdmc_info);
}

type_init(aspeed_sdmc_register_types);