aboutsummaryrefslogtreecommitdiff
path: root/hw/misc/applesmc.c
blob: 8e65816da6693df0d62ff4d6bf02d3cb7cbd26a6 (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
/*
 *  Apple SMC controller
 *
 *  Copyright (c) 2007 Alexander Graf
 *
 *  Authors: Alexander Graf <agraf@suse.de>
 *           Susanne Graf <suse@csgraf.de>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
 *
 * *****************************************************************
 *
 * In all Intel-based Apple hardware there is an SMC chip to control the
 * backlight, fans and several other generic device parameters. It also
 * contains the magic keys used to dongle Mac OS X to the device.
 *
 * This driver was mostly created by looking at the Linux AppleSMC driver
 * implementation and does not support IRQ.
 *
 */

#include "qemu/osdep.h"
#include "hw/isa/isa.h"
#include "hw/qdev-properties.h"
#include "ui/console.h"
#include "qemu/error-report.h"
#include "qemu/module.h"
#include "qemu/timer.h"
#include "qom/object.h"
#include "hw/acpi/acpi_aml_interface.h"

/* #define DEBUG_SMC */

#define APPLESMC_DEFAULT_IOBASE        0x300
#define TYPE_APPLE_SMC "isa-applesmc"
#define APPLESMC_MAX_DATA_LENGTH       32
#define APPLESMC_PROP_IO_BASE "iobase"

enum {
    APPLESMC_DATA_PORT               = 0x00,
    APPLESMC_CMD_PORT                = 0x04,
    APPLESMC_ERR_PORT                = 0x1e,
    APPLESMC_NUM_PORTS               = 0x20,
};

enum {
    APPLESMC_READ_CMD                = 0x10,
    APPLESMC_WRITE_CMD               = 0x11,
    APPLESMC_GET_KEY_BY_INDEX_CMD    = 0x12,
    APPLESMC_GET_KEY_TYPE_CMD        = 0x13,
};

enum {
    APPLESMC_ST_CMD_DONE             = 0x00,
    APPLESMC_ST_DATA_READY           = 0x01,
    APPLESMC_ST_BUSY                 = 0x02,
    APPLESMC_ST_ACK                  = 0x04,
    APPLESMC_ST_NEW_CMD              = 0x08,
};

enum {
    APPLESMC_ST_1E_CMD_INTRUPTED     = 0x80,
    APPLESMC_ST_1E_STILL_BAD_CMD     = 0x81,
    APPLESMC_ST_1E_BAD_CMD           = 0x82,
    APPLESMC_ST_1E_NOEXIST           = 0x84,
    APPLESMC_ST_1E_WRITEONLY         = 0x85,
    APPLESMC_ST_1E_READONLY          = 0x86,
    APPLESMC_ST_1E_BAD_INDEX         = 0xb8,
};

#ifdef DEBUG_SMC
#define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__)
#else
#define smc_debug(...) do { } while (0)
#endif

static char default_osk[64] = "This is a dummy key. Enter the real key "
                              "using the -osk parameter";

struct AppleSMCData {
    uint8_t len;
    const char *key;
    const char *data;
    QLIST_ENTRY(AppleSMCData) node;
};

OBJECT_DECLARE_SIMPLE_TYPE(AppleSMCState, APPLE_SMC)

struct AppleSMCState {
    ISADevice parent_obj;

    MemoryRegion io_data;
    MemoryRegion io_cmd;
    MemoryRegion io_err;
    uint32_t iobase;
    uint8_t cmd;
    uint8_t status;
    uint8_t status_1e;
    uint8_t last_ret;
    char key[4];
    uint8_t read_pos;
    uint8_t data_len;
    uint8_t data_pos;
    uint8_t data[255];
    char *osk;
    QLIST_HEAD(, AppleSMCData) data_def;
};

static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val,
                                  unsigned size)
{
    AppleSMCState *s = opaque;
    uint8_t status = s->status & 0x0f;

    smc_debug("CMD received: 0x%02x\n", (uint8_t)val);
    switch (val) {
    case APPLESMC_READ_CMD:
        /* did last command run through OK? */
        if (status == APPLESMC_ST_CMD_DONE || status == APPLESMC_ST_NEW_CMD) {
            s->cmd = val;
            s->status = APPLESMC_ST_NEW_CMD | APPLESMC_ST_ACK;
        } else {
            smc_debug("ERROR: previous command interrupted!\n");
            s->status = APPLESMC_ST_NEW_CMD;
            s->status_1e = APPLESMC_ST_1E_CMD_INTRUPTED;
        }
        break;
    default:
        smc_debug("UNEXPECTED CMD 0x%02x\n", (uint8_t)val);
        s->status = APPLESMC_ST_NEW_CMD;
        s->status_1e = APPLESMC_ST_1E_BAD_CMD;
    }
    s->read_pos = 0;
    s->data_pos = 0;
}

static struct AppleSMCData *applesmc_find_key(AppleSMCState *s)
{
    struct AppleSMCData *d;

    QLIST_FOREACH(d, &s->data_def, node) {
        if (!memcmp(d->key, s->key, 4)) {
            return d;
        }
    }
    return NULL;
}

static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val,
                                   unsigned size)
{
    AppleSMCState *s = opaque;
    struct AppleSMCData *d;

    smc_debug("DATA received: 0x%02x\n", (uint8_t)val);
    switch (s->cmd) {
    case APPLESMC_READ_CMD:
        if ((s->status & 0x0f) == APPLESMC_ST_CMD_DONE) {
            break;
        }
        if (s->read_pos < 4) {
            s->key[s->read_pos] = val;
            s->status = APPLESMC_ST_ACK;
        } else if (s->read_pos == 4) {
            d = applesmc_find_key(s);
            if (d != NULL) {
                memcpy(s->data, d->data, d->len);
                s->data_len = d->len;
                s->data_pos = 0;
                s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY;
                s->status_1e = APPLESMC_ST_CMD_DONE;  /* clear on valid key */
            } else {
                smc_debug("READ_CMD: key '%c%c%c%c' not found!\n",
                          s->key[0], s->key[1], s->key[2], s->key[3]);
                s->status = APPLESMC_ST_CMD_DONE;
                s->status_1e = APPLESMC_ST_1E_NOEXIST;
            }
        }
        s->read_pos++;
        break;
    default:
        s->status = APPLESMC_ST_CMD_DONE;
        s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD;
    }
}

static void applesmc_io_err_write(void *opaque, hwaddr addr, uint64_t val,
                                  unsigned size)
{
    smc_debug("ERR_CODE received: 0x%02x, ignoring!\n", (uint8_t)val);
    /* NOTE: writing to the error port not supported! */
}

static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr, unsigned size)
{
    AppleSMCState *s = opaque;

    switch (s->cmd) {
    case APPLESMC_READ_CMD:
        if (!(s->status & APPLESMC_ST_DATA_READY)) {
            break;
        }
        if (s->data_pos < s->data_len) {
            s->last_ret = s->data[s->data_pos];
            smc_debug("READ '%c%c%c%c'[%d] = %02x\n",
                      s->key[0], s->key[1], s->key[2], s->key[3],
                      s->data_pos, s->last_ret);
            s->data_pos++;
            if (s->data_pos == s->data_len) {
                s->status = APPLESMC_ST_CMD_DONE;
                smc_debug("READ '%c%c%c%c' Len=%d complete!\n",
                          s->key[0], s->key[1], s->key[2], s->key[3],
                          s->data_len);
            } else {
                s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY;
            }
        }
        break;
    default:
        s->status = APPLESMC_ST_CMD_DONE;
        s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD;
    }
    smc_debug("DATA sent: 0x%02x\n", s->last_ret);

    return s->last_ret;
}

static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr, unsigned size)
{
    AppleSMCState *s = opaque;

    smc_debug("CMD sent: 0x%02x\n", s->status);
    return s->status;
}

static uint64_t applesmc_io_err_read(void *opaque, hwaddr addr, unsigned size)
{
    AppleSMCState *s = opaque;

    /* NOTE: read does not clear the 1e status */
    smc_debug("ERR_CODE sent: 0x%02x\n", s->status_1e);
    return s->status_1e;
}

static void applesmc_add_key(AppleSMCState *s, const char *key,
                             int len, const char *data)
{
    struct AppleSMCData *def;

    def = g_new0(struct AppleSMCData, 1);
    def->key = key;
    def->len = len;
    def->data = data;

    QLIST_INSERT_HEAD(&s->data_def, def, node);
}

static void qdev_applesmc_isa_reset(DeviceState *dev)
{
    AppleSMCState *s = APPLE_SMC(dev);
    struct AppleSMCData *d, *next;

    /* Remove existing entries */
    QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
        QLIST_REMOVE(d, node);
    }
    s->status = 0x00;
    s->status_1e = 0x00;
    s->last_ret = 0x00;

    applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
    applesmc_add_key(s, "OSK0", 32, s->osk);
    applesmc_add_key(s, "OSK1", 32, s->osk + 32);
    applesmc_add_key(s, "NATJ", 1, "\0");
    applesmc_add_key(s, "MSSP", 1, "\0");
    applesmc_add_key(s, "MSSD", 1, "\0x3");
}

static const MemoryRegionOps applesmc_data_io_ops = {
    .write = applesmc_io_data_write,
    .read = applesmc_io_data_read,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static const MemoryRegionOps applesmc_cmd_io_ops = {
    .write = applesmc_io_cmd_write,
    .read = applesmc_io_cmd_read,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static const MemoryRegionOps applesmc_err_io_ops = {
    .write = applesmc_io_err_write,
    .read = applesmc_io_err_read,
    .endianness = DEVICE_NATIVE_ENDIAN,
    .impl = {
        .min_access_size = 1,
        .max_access_size = 1,
    },
};

static void applesmc_isa_realize(DeviceState *dev, Error **errp)
{
    AppleSMCState *s = APPLE_SMC(dev);

    memory_region_init_io(&s->io_data, OBJECT(s), &applesmc_data_io_ops, s,
                          "applesmc-data", 1);
    isa_register_ioport(&s->parent_obj, &s->io_data,
                        s->iobase + APPLESMC_DATA_PORT);

    memory_region_init_io(&s->io_cmd, OBJECT(s), &applesmc_cmd_io_ops, s,
                          "applesmc-cmd", 1);
    isa_register_ioport(&s->parent_obj, &s->io_cmd,
                        s->iobase + APPLESMC_CMD_PORT);

    memory_region_init_io(&s->io_err, OBJECT(s), &applesmc_err_io_ops, s,
                          "applesmc-err", 1);
    isa_register_ioport(&s->parent_obj, &s->io_err,
                        s->iobase + APPLESMC_ERR_PORT);

    if (!s->osk || (strlen(s->osk) != 64)) {
        warn_report("Using AppleSMC with invalid key");
        s->osk = default_osk;
    }

    QLIST_INIT(&s->data_def);
}

static Property applesmc_isa_properties[] = {
    DEFINE_PROP_UINT32(APPLESMC_PROP_IO_BASE, AppleSMCState, iobase,
                       APPLESMC_DEFAULT_IOBASE),
    DEFINE_PROP_STRING("osk", AppleSMCState, osk),
    DEFINE_PROP_END_OF_LIST(),
};

static void build_applesmc_aml(AcpiDevAmlIf *adev, Aml *scope)
{
    Aml *crs;
    AppleSMCState *s = APPLE_SMC(adev);
    uint32_t iobase = s->iobase;
    Aml *dev = aml_device("SMC");

    aml_append(dev, aml_name_decl("_HID", aml_eisaid("APP0001")));
    /* device present, functioning, decoding, not shown in UI */
    aml_append(dev, aml_name_decl("_STA", aml_int(0xB)));
    crs = aml_resource_template();
    aml_append(crs,
        aml_io(AML_DECODE16, iobase, iobase, 0x01, APPLESMC_MAX_DATA_LENGTH)
    );
    aml_append(crs, aml_irq_no_flags(6));
    aml_append(dev, aml_name_decl("_CRS", crs));
    aml_append(scope, dev);
}

static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    AcpiDevAmlIfClass *adevc = ACPI_DEV_AML_IF_CLASS(klass);

    dc->realize = applesmc_isa_realize;
    dc->reset = qdev_applesmc_isa_reset;
    device_class_set_props(dc, applesmc_isa_properties);
    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
    adevc->build_dev_aml = build_applesmc_aml;
}

static const TypeInfo applesmc_isa_info = {
    .name          = TYPE_APPLE_SMC,
    .parent        = TYPE_ISA_DEVICE,
    .instance_size = sizeof(AppleSMCState),
    .class_init    = qdev_applesmc_class_init,
    .interfaces = (InterfaceInfo[]) {
        { TYPE_ACPI_DEV_AML_IF },
        { },
    },
};

static void applesmc_register_types(void)
{
    type_register_static(&applesmc_isa_info);
}

type_init(applesmc_register_types)