aboutsummaryrefslogtreecommitdiff
path: root/hw/misc/applesmc.c
blob: 1e8d183e7f881b34c120b96563bc2c4a2ced2fb4 (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
/*
 *  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 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 "hw/hw.h"
#include "hw/isa/isa.h"
#include "ui/console.h"
#include "qemu/timer.h"

/* #define DEBUG_SMC */

#define APPLESMC_DEFAULT_IOBASE        0x300
/* data port used by Apple SMC */
#define APPLESMC_DATA_PORT             0x0
/* command/status port used by Apple SMC */
#define APPLESMC_CMD_PORT              0x4
#define APPLESMC_NR_PORTS              32
#define APPLESMC_MAX_DATA_LENGTH       32

#define APPLESMC_READ_CMD              0x10
#define APPLESMC_WRITE_CMD             0x11
#define APPLESMC_GET_KEY_BY_INDEX_CMD  0x12
#define APPLESMC_GET_KEY_TYPE_CMD      0x13

#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;
};

#define TYPE_APPLE_SMC "isa-applesmc"
#define APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC)

typedef struct AppleSMCState AppleSMCState;
struct AppleSMCState {
    ISADevice parent_obj;

    MemoryRegion io_data;
    MemoryRegion io_cmd;
    uint32_t iobase;
    uint8_t cmd;
    uint8_t status;
    uint8_t key[4];
    uint8_t read_pos;
    uint8_t data_len;
    uint8_t data_pos;
    uint8_t data[255];
    uint8_t charactic[4];
    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;

    smc_debug("CMD Write B: %#x = %#x\n", addr, val);
    switch(val) {
        case APPLESMC_READ_CMD:
            s->status = 0x0c;
            break;
    }
    s->cmd = val;
    s->read_pos = 0;
    s->data_pos = 0;
}

static void applesmc_fill_data(AppleSMCState *s)
{
    struct AppleSMCData *d;

    QLIST_FOREACH(d, &s->data_def, node) {
        if (!memcmp(d->key, s->key, 4)) {
            smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key,
                      d->len, d->data);
            memcpy(s->data, d->data, d->len);
            return;
        }
    }
}

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

    smc_debug("DATA Write B: %#x = %#x\n", addr, val);
    switch(s->cmd) {
        case APPLESMC_READ_CMD:
            if(s->read_pos < 4) {
                s->key[s->read_pos] = val;
                s->status = 0x04;
            } else if(s->read_pos == 4) {
                s->data_len = val;
                s->status = 0x05;
                s->data_pos = 0;
                smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0],
                          s->key[1], s->key[2], s->key[3], val);
                applesmc_fill_data(s);
            }
            s->read_pos++;
            break;
    }
}

static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr1,
                                      unsigned size)
{
    AppleSMCState *s = opaque;
    uint8_t retval = 0;

    switch(s->cmd) {
        case APPLESMC_READ_CMD:
            if(s->data_pos < s->data_len) {
                retval = s->data[s->data_pos];
                smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos,
                          retval);
                s->data_pos++;
                if(s->data_pos == s->data_len) {
                    s->status = 0x00;
                    smc_debug("EOF\n");
                } else
                    s->status = 0x05;
            }
    }
    smc_debug("DATA Read b: %#x = %#x\n", addr1, retval);

    return retval;
}

static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr1, unsigned size)
{
    AppleSMCState *s = opaque;

    smc_debug("CMD Read B: %#x\n", addr1);
    return s->status;
}

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

    def = g_malloc0(sizeof(struct AppleSMCData));
    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);
    }

    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 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", 4);
    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", 4);
    isa_register_ioport(&s->parent_obj, &s->io_cmd,
                        s->iobase + APPLESMC_CMD_PORT);

    if (!s->osk || (strlen(s->osk) != 64)) {
        fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
        s->osk = default_osk;
    }

    QLIST_INIT(&s->data_def);
    qdev_applesmc_isa_reset(dev);
}

static Property applesmc_isa_properties[] = {
    DEFINE_PROP_HEX32("iobase", AppleSMCState, iobase,
                      APPLESMC_DEFAULT_IOBASE),
    DEFINE_PROP_STRING("osk", AppleSMCState, osk),
    DEFINE_PROP_END_OF_LIST(),
};

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

    dc->realize = applesmc_isa_realize;
    dc->reset = qdev_applesmc_isa_reset;
    dc->props = applesmc_isa_properties;
    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}

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

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

type_init(applesmc_register_types)