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xemu/hw/xbox/smbus_xbox_smc.c

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/*
* QEMU SMBus Xbox System Management Controller
*
* Copyright (c) 2011 espes
* Copyright (c) 2020-2021 Matt Borgerson
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/option.h"
#include "hw/hw.h"
#include "hw/acpi/acpi.h"
#include "hw/i2c/i2c.h"
#include "hw/i2c/smbus_slave.h"
#include "qemu/config-file.h"
#include "qapi/error.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "sysemu/sysemu.h"
#include "smbus.h"
#include "sysemu/runstate.h"
#include "hw/qdev-properties.h"
#include "block/block_int-io.h"
#define TYPE_XBOX_SMC "smbus-xbox-smc"
#define XBOX_SMC(obj) OBJECT_CHECK(SMBusSMCDevice, (obj), TYPE_XBOX_SMC)
// #define DEBUG
#ifdef DEBUG
# define DPRINTF(format, ...) printf(format, ## __VA_ARGS__)
#else
# define DPRINTF(format, ...) do { } while (0)
#endif
/*
* Hardware is a PIC16LC
* http://www.xbox-linux.org/wiki/PIC
*/
#define SMC_REG_VER 0x01
#define SMC_REG_POWER 0x02
#define SMC_REG_POWER_RESET 0x01
#define SMC_REG_POWER_CYCLE 0x40
#define SMC_REG_POWER_SHUTDOWN 0x80
#define SMC_REG_TRAYSTATE 0x03
#define SMC_REG_TRAYSTATE_OPEN 0x10
#define SMC_REG_TRAYSTATE_NO_MEDIA_DETECTED 0x40
#define SMC_REG_TRAYSTATE_MEDIA_DETECTED 0x60
#define SMC_REG_AVPACK 0x04
#define SMC_REG_AVPACK_SCART 0x00
#define SMC_REG_AVPACK_HDTV 0x01
#define SMC_REG_AVPACK_VGA 0x02
#define SMC_REG_AVPACK_RFU 0x03
#define SMC_REG_AVPACK_SVIDEO 0x04
#define SMC_REG_AVPACK_COMPOSITE 0x06
#define SMC_REG_AVPACK_NONE 0x07
#define SMC_REG_FANMODE 0x05
#define SMC_REG_FANSPEED 0x06
#define SMC_REG_LEDMODE 0x07
#define SMC_REG_LEDSEQ 0x08
#define SMC_REG_CPUTEMP 0x09
#define SMC_REG_BOARDTEMP 0x0a
#define SMC_REG_TRAYEJECT 0x0c
#define SMC_REG_INTACK 0x0d
#define SMC_REG_ERROR_WRITE 0x0e
#define SMC_REG_ERROR_READ 0x0f
#define SMC_REG_INTSTATUS 0x11
#define SMC_REG_INTSTATUS_POWER 0x01
#define SMC_REG_INTSTATUS_TRAYCLOSED 0x02
#define SMC_REG_INTSTATUS_TRAYOPENING 0x04
#define SMC_REG_INTSTATUS_AVPACK_PLUG 0x08
#define SMC_REG_INTSTATUS_AVPACK_UNPLUG 0x10
#define SMC_REG_INTSTATUS_EJECT_BUTTON 0x20
#define SMC_REG_INTSTATUS_TRAYCLOSING 0x40
#define SMC_REG_RESETONEJECT 0x19
#define SMC_REG_INTEN 0x1a
#define SMC_REG_SCRATCH 0x1b
#define SMC_REG_SCRATCH_SHORT_ANIMATION 0x04
#define SMC_VERSION_LENGTH 3
typedef struct SMBusSMCDevice {
SMBusDevice smbusdev;
char *version_string;
int version_string_index;
uint8_t cmd;
uint8_t traystate_reg;
uint8_t avpack_reg;
uint8_t intstatus_reg;
uint8_t scratch_reg;
uint8_t error_reg;
} SMBusSMCDevice;
static void smc_quick_cmd(SMBusDevice *dev, uint8_t read)
{
DPRINTF("smc_quick_cmd: addr=0x%02x read=%d\n", dev->i2c.address, read);
}
static int smc_write_data(SMBusDevice *dev, uint8_t *buf, uint8_t len)
{
SMBusSMCDevice *smc = XBOX_SMC(dev);
smc->cmd = buf[0];
uint8_t cmd = smc->cmd;
buf++;
len--;
if (len < 1) return 0;
DPRINTF("smc_write_byte: addr=0x%02x cmd=0x%02x val=0x%02x\n",
dev->i2c.address, cmd, buf[0]);
switch (cmd) {
case SMC_REG_VER:
/* version string reset */
smc->version_string_index = buf[0];
break;
case SMC_REG_POWER:
if (buf[0] & (SMC_REG_POWER_RESET | SMC_REG_POWER_CYCLE)) {
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
} else if (buf[0] & SMC_REG_POWER_SHUTDOWN) {
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
break;
case SMC_REG_ERROR_WRITE:
smc->error_reg = buf[0];
break;
case SMC_REG_SCRATCH:
smc->scratch_reg = buf[0];
break;
/* challenge response
* (http://www.xbox-linux.org/wiki/PIC_Challenge_Handshake_Sequence) */
case 0x20:
break;
case 0x21:
break;
default:
break;
}
return 0;
}
static uint8_t smc_receive_byte(SMBusDevice *dev)
{
SMBusSMCDevice *smc = XBOX_SMC(dev);
DPRINTF("smc_receive_byte: addr=0x%02x cmd=0x%02x\n",
dev->i2c.address, smc->cmd);
uint8_t cmd = smc->cmd++;
switch (cmd) {
case SMC_REG_VER:
return smc->version_string[
smc->version_string_index++ % SMC_VERSION_LENGTH];
case SMC_REG_TRAYSTATE:
return smc->traystate_reg;
case SMC_REG_SCRATCH:
return smc->scratch_reg;
case SMC_REG_AVPACK:
return smc->avpack_reg;
case SMC_REG_ERROR_READ:
return smc->error_reg;
case SMC_REG_INTSTATUS: {
uint8_t r = smc->intstatus_reg;
smc->intstatus_reg = 0; // FIXME: Confirm clear on read
return r;
}
/* challenge request:
* must be non-0 */
case 0x1c:
return 0x52;
case 0x1d:
return 0x72;
case 0x1e:
return 0xea;
case 0x1f:
return 0x46;
default:
break;
}
return 0;
}
bool xbox_smc_avpack_to_reg(const char *avpack, uint8_t *value)
{
uint8_t r;
if (!strcmp(avpack, "composite")) {
r = SMC_REG_AVPACK_COMPOSITE;
} else if (!strcmp(avpack, "scart")) {
r = SMC_REG_AVPACK_SCART;
} else if (!strcmp(avpack, "svideo")) {
r = SMC_REG_AVPACK_SVIDEO;
} else if (!strcmp(avpack, "vga")) {
r = SMC_REG_AVPACK_VGA;
} else if (!strcmp(avpack, "rfu")) {
r = SMC_REG_AVPACK_RFU;
} else if (!strcmp(avpack, "hdtv")) {
r = SMC_REG_AVPACK_HDTV;
} else if (!strcmp(avpack, "none")) {
r = SMC_REG_AVPACK_NONE;
} else {
return false;
}
if (value) {
*value = r;
}
return true;
}
void xbox_smc_append_avpack_hint(Error **errp)
{
error_append_hint(errp, "Valid options are: composite, scart, svideo, vga, rfu, hdtv (default), none\n");
}
void xbox_smc_append_smc_version_hint(Error **errp)
{
error_append_hint(errp, "Valid versions must have 3 characters total\n");
}
static void smbus_smc_realize(DeviceState *dev, Error **errp)
{
SMBusSMCDevice *smc = XBOX_SMC(dev);
char *avpack;
char *smc_version;
smc->version_string = NULL;
smc->version_string_index = 0;
smc->traystate_reg = 0;
smc->avpack_reg = 0; /* Default value for Chihiro machine */
smc->intstatus_reg = 0;
smc->scratch_reg = 0;
smc->cmd = 0;
smc->error_reg = 0;
if (object_property_get_bool(qdev_get_machine(), "short-animation", NULL)) {
smc->scratch_reg = SMC_REG_SCRATCH_SHORT_ANIMATION;
}
avpack = object_property_get_str(qdev_get_machine(), "avpack", NULL);
if (avpack) {
if (!xbox_smc_avpack_to_reg(avpack, &smc->avpack_reg)) {
error_setg(errp, "Unsupported avpack option '%s'", avpack);
xbox_smc_append_avpack_hint(errp);
}
g_free(avpack);
}
smc_version = object_property_get_str(qdev_get_machine(), "smc-version", NULL);
if (smc_version) {
if (strlen(smc_version) != SMC_VERSION_LENGTH) {
error_setg(errp, "Unsupported SMC version string '%s'", smc_version);
xbox_smc_append_smc_version_hint(errp);
}
smc->version_string = g_strdup(smc_version);
g_free(smc_version);
}
xbox_smc_update_tray_state();
}
static void smbus_smc_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
SMBusDeviceClass *sc = SMBUS_DEVICE_CLASS(klass);
dc->realize = smbus_smc_realize;
sc->quick_cmd = smc_quick_cmd;
sc->receive_byte = smc_receive_byte;
sc->write_data = smc_write_data;
}
static TypeInfo smbus_smc_info = {
.name = TYPE_XBOX_SMC,
.parent = TYPE_SMBUS_DEVICE,
.instance_size = sizeof(SMBusSMCDevice),
.class_init = smbus_smc_class_initfn,
};
static void smbus_smc_register_devices(void)
{
type_register_static(&smbus_smc_info);
}
type_init(smbus_smc_register_devices)
void smbus_xbox_smc_init(I2CBus *smbus, int address)
{
DeviceState *dev;
dev = qdev_new(TYPE_XBOX_SMC);
qdev_prop_set_uint8(dev, "address", address);
qdev_realize_and_unref(dev, (BusState *)smbus, &error_fatal);
}
static void xbox_assert_extsmi(void)
{
Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
acpi_send_event(DEVICE(obj), ACPI_EXTSMI_STATUS);
}
void xbox_smc_power_button(void)
{
Object *obj = object_resolve_path_type("", TYPE_XBOX_SMC, NULL);
SMBusSMCDevice *smc = XBOX_SMC(obj);
smc->intstatus_reg |= SMC_REG_INTSTATUS_POWER;
xbox_assert_extsmi();
}
void xbox_smc_eject_button(void)
{
Object *obj = object_resolve_path_type("", TYPE_XBOX_SMC, NULL);
SMBusSMCDevice *smc = XBOX_SMC(obj);
smc->intstatus_reg |= SMC_REG_INTSTATUS_EJECT_BUTTON;
xbox_assert_extsmi();
}
// FIXME: Ideally this would be called on a tray state change callback (see
// tray_moved event), for now it's called explicitly from UI upon user
// interaction.
void xbox_smc_update_tray_state(void)
{
Object *obj = object_resolve_path_type("", TYPE_XBOX_SMC, NULL);
SMBusSMCDevice *smc = XBOX_SMC(obj);
const char *blk_name = "ide0-cd1";
BlockBackend *blk = blk_by_name(blk_name);
assert(blk != NULL);
if (blk_dev_is_tray_open(blk)) {
smc->traystate_reg = SMC_REG_TRAYSTATE_OPEN;
smc->intstatus_reg |= SMC_REG_INTSTATUS_TRAYOPENING;
} else {
BlockDriverState *bs = blk_bs(blk);
smc->traystate_reg = (bs && bs->drv)
? SMC_REG_TRAYSTATE_MEDIA_DETECTED
: SMC_REG_TRAYSTATE_NO_MEDIA_DETECTED;
smc->intstatus_reg |= SMC_REG_INTSTATUS_TRAYCLOSED;
}
xbox_assert_extsmi();
}
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