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qemu/hw/misc/applesmc.c

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/*
* 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_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 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_UINT32(APPLESMC_PROP_IO_BASE, 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)
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