372 lines
11 KiB
C
372 lines
11 KiB
C
/*
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* Apple SMC controller
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*
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* Copyright (c) 2007 Alexander Graf
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*
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* Authors: Alexander Graf <agraf@suse.de>
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* Susanne Graf <suse@csgraf.de>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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* *****************************************************************
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*
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* In all Intel-based Apple hardware there is an SMC chip to control the
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* backlight, fans and several other generic device parameters. It also
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* contains the magic keys used to dongle Mac OS X to the device.
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*
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* This driver was mostly created by looking at the Linux AppleSMC driver
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* implementation and does not support IRQ.
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*
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*/
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#include "qemu/osdep.h"
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#include "hw/hw.h"
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#include "hw/isa/isa.h"
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#include "ui/console.h"
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#include "qemu/timer.h"
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/* #define DEBUG_SMC */
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#define APPLESMC_DEFAULT_IOBASE 0x300
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enum {
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APPLESMC_DATA_PORT = 0x00,
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APPLESMC_CMD_PORT = 0x04,
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APPLESMC_ERR_PORT = 0x1e,
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APPLESMC_NUM_PORTS = 0x20,
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};
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enum {
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APPLESMC_READ_CMD = 0x10,
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APPLESMC_WRITE_CMD = 0x11,
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APPLESMC_GET_KEY_BY_INDEX_CMD = 0x12,
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APPLESMC_GET_KEY_TYPE_CMD = 0x13,
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};
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enum {
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APPLESMC_ST_CMD_DONE = 0x00,
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APPLESMC_ST_DATA_READY = 0x01,
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APPLESMC_ST_BUSY = 0x02,
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APPLESMC_ST_ACK = 0x04,
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APPLESMC_ST_NEW_CMD = 0x08,
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};
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enum {
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APPLESMC_ST_1E_CMD_INTRUPTED = 0x80,
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APPLESMC_ST_1E_STILL_BAD_CMD = 0x81,
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APPLESMC_ST_1E_BAD_CMD = 0x82,
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APPLESMC_ST_1E_NOEXIST = 0x84,
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APPLESMC_ST_1E_WRITEONLY = 0x85,
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APPLESMC_ST_1E_READONLY = 0x86,
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APPLESMC_ST_1E_BAD_INDEX = 0xb8,
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};
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#ifdef DEBUG_SMC
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#define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__)
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#else
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#define smc_debug(...) do { } while (0)
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#endif
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static char default_osk[64] = "This is a dummy key. Enter the real key "
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"using the -osk parameter";
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struct AppleSMCData {
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uint8_t len;
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const char *key;
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const char *data;
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QLIST_ENTRY(AppleSMCData) node;
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};
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#define APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC)
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typedef struct AppleSMCState AppleSMCState;
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struct AppleSMCState {
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ISADevice parent_obj;
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MemoryRegion io_data;
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MemoryRegion io_cmd;
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MemoryRegion io_err;
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uint32_t iobase;
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uint8_t cmd;
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uint8_t status;
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uint8_t status_1e;
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uint8_t last_ret;
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char key[4];
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uint8_t read_pos;
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uint8_t data_len;
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uint8_t data_pos;
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uint8_t data[255];
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char *osk;
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QLIST_HEAD(, AppleSMCData) data_def;
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};
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static void applesmc_io_cmd_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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AppleSMCState *s = opaque;
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uint8_t status = s->status & 0x0f;
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smc_debug("CMD received: 0x%02x\n", (uint8_t)val);
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switch (val) {
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case APPLESMC_READ_CMD:
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/* did last command run through OK? */
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if (status == APPLESMC_ST_CMD_DONE || status == APPLESMC_ST_NEW_CMD) {
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s->cmd = val;
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s->status = APPLESMC_ST_NEW_CMD | APPLESMC_ST_ACK;
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} else {
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smc_debug("ERROR: previous command interrupted!\n");
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s->status = APPLESMC_ST_NEW_CMD;
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s->status_1e = APPLESMC_ST_1E_CMD_INTRUPTED;
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}
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break;
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default:
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smc_debug("UNEXPECTED CMD 0x%02x\n", (uint8_t)val);
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s->status = APPLESMC_ST_NEW_CMD;
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s->status_1e = APPLESMC_ST_1E_BAD_CMD;
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}
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s->read_pos = 0;
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s->data_pos = 0;
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}
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static struct AppleSMCData *applesmc_find_key(AppleSMCState *s)
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{
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struct AppleSMCData *d;
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QLIST_FOREACH(d, &s->data_def, node) {
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if (!memcmp(d->key, s->key, 4)) {
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return d;
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}
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}
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return NULL;
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}
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static void applesmc_io_data_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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AppleSMCState *s = opaque;
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struct AppleSMCData *d;
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smc_debug("DATA received: 0x%02x\n", (uint8_t)val);
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switch (s->cmd) {
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case APPLESMC_READ_CMD:
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if ((s->status & 0x0f) == APPLESMC_ST_CMD_DONE) {
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break;
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}
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if (s->read_pos < 4) {
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s->key[s->read_pos] = val;
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s->status = APPLESMC_ST_ACK;
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} else if (s->read_pos == 4) {
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d = applesmc_find_key(s);
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if (d != NULL) {
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memcpy(s->data, d->data, d->len);
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s->data_len = d->len;
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s->data_pos = 0;
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s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY;
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s->status_1e = APPLESMC_ST_CMD_DONE; /* clear on valid key */
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} else {
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smc_debug("READ_CMD: key '%c%c%c%c' not found!\n",
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s->key[0], s->key[1], s->key[2], s->key[3]);
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s->status = APPLESMC_ST_CMD_DONE;
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s->status_1e = APPLESMC_ST_1E_NOEXIST;
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}
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}
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s->read_pos++;
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break;
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default:
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s->status = APPLESMC_ST_CMD_DONE;
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s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD;
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}
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}
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static void applesmc_io_err_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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smc_debug("ERR_CODE received: 0x%02x, ignoring!\n", (uint8_t)val);
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/* NOTE: writing to the error port not supported! */
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}
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static uint64_t applesmc_io_data_read(void *opaque, hwaddr addr, unsigned size)
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{
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AppleSMCState *s = opaque;
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switch (s->cmd) {
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case APPLESMC_READ_CMD:
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if (!(s->status & APPLESMC_ST_DATA_READY)) {
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break;
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}
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if (s->data_pos < s->data_len) {
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s->last_ret = s->data[s->data_pos];
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smc_debug("READ '%c%c%c%c'[%d] = %02x\n",
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s->key[0], s->key[1], s->key[2], s->key[3],
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s->data_pos, s->last_ret);
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s->data_pos++;
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if (s->data_pos == s->data_len) {
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s->status = APPLESMC_ST_CMD_DONE;
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smc_debug("READ '%c%c%c%c' Len=%d complete!\n",
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s->key[0], s->key[1], s->key[2], s->key[3],
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s->data_len);
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} else {
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s->status = APPLESMC_ST_ACK | APPLESMC_ST_DATA_READY;
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}
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}
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break;
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default:
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s->status = APPLESMC_ST_CMD_DONE;
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s->status_1e = APPLESMC_ST_1E_STILL_BAD_CMD;
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}
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smc_debug("DATA sent: 0x%02x\n", s->last_ret);
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return s->last_ret;
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}
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static uint64_t applesmc_io_cmd_read(void *opaque, hwaddr addr, unsigned size)
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{
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AppleSMCState *s = opaque;
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smc_debug("CMD sent: 0x%02x\n", s->status);
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return s->status;
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}
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static uint64_t applesmc_io_err_read(void *opaque, hwaddr addr, unsigned size)
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{
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AppleSMCState *s = opaque;
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/* NOTE: read does not clear the 1e status */
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smc_debug("ERR_CODE sent: 0x%02x\n", s->status_1e);
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return s->status_1e;
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}
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static void applesmc_add_key(AppleSMCState *s, const char *key,
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int len, const char *data)
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{
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struct AppleSMCData *def;
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def = g_malloc0(sizeof(struct AppleSMCData));
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def->key = key;
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def->len = len;
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def->data = data;
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QLIST_INSERT_HEAD(&s->data_def, def, node);
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}
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static void qdev_applesmc_isa_reset(DeviceState *dev)
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{
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AppleSMCState *s = APPLE_SMC(dev);
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struct AppleSMCData *d, *next;
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/* Remove existing entries */
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QLIST_FOREACH_SAFE(d, &s->data_def, node, next) {
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QLIST_REMOVE(d, node);
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}
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s->status = 0x00;
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s->status_1e = 0x00;
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s->last_ret = 0x00;
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applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03");
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applesmc_add_key(s, "OSK0", 32, s->osk);
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applesmc_add_key(s, "OSK1", 32, s->osk + 32);
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applesmc_add_key(s, "NATJ", 1, "\0");
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applesmc_add_key(s, "MSSP", 1, "\0");
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applesmc_add_key(s, "MSSD", 1, "\0x3");
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}
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static const MemoryRegionOps applesmc_data_io_ops = {
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.write = applesmc_io_data_write,
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.read = applesmc_io_data_read,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static const MemoryRegionOps applesmc_cmd_io_ops = {
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.write = applesmc_io_cmd_write,
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.read = applesmc_io_cmd_read,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static const MemoryRegionOps applesmc_err_io_ops = {
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.write = applesmc_io_err_write,
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.read = applesmc_io_err_read,
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.endianness = DEVICE_NATIVE_ENDIAN,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static void applesmc_isa_realize(DeviceState *dev, Error **errp)
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{
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AppleSMCState *s = APPLE_SMC(dev);
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memory_region_init_io(&s->io_data, OBJECT(s), &applesmc_data_io_ops, s,
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"applesmc-data", 1);
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isa_register_ioport(&s->parent_obj, &s->io_data,
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s->iobase + APPLESMC_DATA_PORT);
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memory_region_init_io(&s->io_cmd, OBJECT(s), &applesmc_cmd_io_ops, s,
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"applesmc-cmd", 1);
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isa_register_ioport(&s->parent_obj, &s->io_cmd,
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s->iobase + APPLESMC_CMD_PORT);
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memory_region_init_io(&s->io_err, OBJECT(s), &applesmc_err_io_ops, s,
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"applesmc-err", 1);
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isa_register_ioport(&s->parent_obj, &s->io_err,
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s->iobase + APPLESMC_ERR_PORT);
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if (!s->osk || (strlen(s->osk) != 64)) {
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fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n");
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s->osk = default_osk;
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}
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QLIST_INIT(&s->data_def);
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qdev_applesmc_isa_reset(dev);
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}
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static Property applesmc_isa_properties[] = {
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DEFINE_PROP_UINT32(APPLESMC_PROP_IO_BASE, AppleSMCState, iobase,
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APPLESMC_DEFAULT_IOBASE),
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DEFINE_PROP_STRING("osk", AppleSMCState, osk),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void qdev_applesmc_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->realize = applesmc_isa_realize;
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dc->reset = qdev_applesmc_isa_reset;
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dc->props = applesmc_isa_properties;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo applesmc_isa_info = {
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.name = TYPE_APPLE_SMC,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof(AppleSMCState),
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.class_init = qdev_applesmc_class_init,
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};
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static void applesmc_register_types(void)
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{
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type_register_static(&applesmc_isa_info);
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}
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type_init(applesmc_register_types)
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