1 /* 2 * Apple SMC controller 3 * 4 * Copyright (c) 2007 Alexander Graf 5 * 6 * Authors: Alexander Graf <agraf@suse.de> 7 * Susanne Graf <suse@csgraf.de> 8 * 9 * This library is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU Lesser General Public 11 * License as published by the Free Software Foundation; either 12 * version 2 of the License, or (at your option) any later version. 13 * 14 * This library is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 17 * Lesser General Public License for more details. 18 * 19 * You should have received a copy of the GNU Lesser General Public 20 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 21 * 22 * ***************************************************************** 23 * 24 * In all Intel-based Apple hardware there is an SMC chip to control the 25 * backlight, fans and several other generic device parameters. It also 26 * contains the magic keys used to dongle Mac OS X to the device. 27 * 28 * This driver was mostly created by looking at the Linux AppleSMC driver 29 * implementation and does not support IRQ. 30 * 31 */ 32 33 #include "hw/hw.h" 34 #include "hw/isa/isa.h" 35 #include "ui/console.h" 36 #include "qemu/timer.h" 37 38 /* #define DEBUG_SMC */ 39 40 #define APPLESMC_DEFAULT_IOBASE 0x300 41 /* data port used by Apple SMC */ 42 #define APPLESMC_DATA_PORT 0x0 43 /* command/status port used by Apple SMC */ 44 #define APPLESMC_CMD_PORT 0x4 45 #define APPLESMC_NR_PORTS 32 46 #define APPLESMC_MAX_DATA_LENGTH 32 47 48 #define APPLESMC_READ_CMD 0x10 49 #define APPLESMC_WRITE_CMD 0x11 50 #define APPLESMC_GET_KEY_BY_INDEX_CMD 0x12 51 #define APPLESMC_GET_KEY_TYPE_CMD 0x13 52 53 #ifdef DEBUG_SMC 54 #define smc_debug(...) fprintf(stderr, "AppleSMC: " __VA_ARGS__) 55 #else 56 #define smc_debug(...) do { } while(0) 57 #endif 58 59 static char default_osk[64] = "This is a dummy key. Enter the real key " 60 "using the -osk parameter"; 61 62 struct AppleSMCData { 63 uint8_t len; 64 const char *key; 65 const char *data; 66 QLIST_ENTRY(AppleSMCData) node; 67 }; 68 69 struct AppleSMCStatus { 70 ISADevice dev; 71 uint32_t iobase; 72 uint8_t cmd; 73 uint8_t status; 74 uint8_t key[4]; 75 uint8_t read_pos; 76 uint8_t data_len; 77 uint8_t data_pos; 78 uint8_t data[255]; 79 uint8_t charactic[4]; 80 char *osk; 81 QLIST_HEAD(, AppleSMCData) data_def; 82 }; 83 84 static void applesmc_io_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) 85 { 86 struct AppleSMCStatus *s = opaque; 87 88 smc_debug("CMD Write B: %#x = %#x\n", addr, val); 89 switch(val) { 90 case APPLESMC_READ_CMD: 91 s->status = 0x0c; 92 break; 93 } 94 s->cmd = val; 95 s->read_pos = 0; 96 s->data_pos = 0; 97 } 98 99 static void applesmc_fill_data(struct AppleSMCStatus *s) 100 { 101 struct AppleSMCData *d; 102 103 QLIST_FOREACH(d, &s->data_def, node) { 104 if (!memcmp(d->key, s->key, 4)) { 105 smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key, 106 d->len, d->data); 107 memcpy(s->data, d->data, d->len); 108 return; 109 } 110 } 111 } 112 113 static void applesmc_io_data_writeb(void *opaque, uint32_t addr, uint32_t val) 114 { 115 struct AppleSMCStatus *s = opaque; 116 117 smc_debug("DATA Write B: %#x = %#x\n", addr, val); 118 switch(s->cmd) { 119 case APPLESMC_READ_CMD: 120 if(s->read_pos < 4) { 121 s->key[s->read_pos] = val; 122 s->status = 0x04; 123 } else if(s->read_pos == 4) { 124 s->data_len = val; 125 s->status = 0x05; 126 s->data_pos = 0; 127 smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0], 128 s->key[1], s->key[2], s->key[3], val); 129 applesmc_fill_data(s); 130 } 131 s->read_pos++; 132 break; 133 } 134 } 135 136 static uint32_t applesmc_io_data_readb(void *opaque, uint32_t addr1) 137 { 138 struct AppleSMCStatus *s = opaque; 139 uint8_t retval = 0; 140 141 switch(s->cmd) { 142 case APPLESMC_READ_CMD: 143 if(s->data_pos < s->data_len) { 144 retval = s->data[s->data_pos]; 145 smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos, 146 retval); 147 s->data_pos++; 148 if(s->data_pos == s->data_len) { 149 s->status = 0x00; 150 smc_debug("EOF\n"); 151 } else 152 s->status = 0x05; 153 } 154 } 155 smc_debug("DATA Read b: %#x = %#x\n", addr1, retval); 156 157 return retval; 158 } 159 160 static uint32_t applesmc_io_cmd_readb(void *opaque, uint32_t addr1) 161 { 162 struct AppleSMCStatus *s = opaque; 163 164 smc_debug("CMD Read B: %#x\n", addr1); 165 return s->status; 166 } 167 168 static void applesmc_add_key(struct AppleSMCStatus *s, const char *key, 169 int len, const char *data) 170 { 171 struct AppleSMCData *def; 172 173 def = g_malloc0(sizeof(struct AppleSMCData)); 174 def->key = key; 175 def->len = len; 176 def->data = data; 177 178 QLIST_INSERT_HEAD(&s->data_def, def, node); 179 } 180 181 static void qdev_applesmc_isa_reset(DeviceState *dev) 182 { 183 struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev.qdev, dev); 184 struct AppleSMCData *d, *next; 185 186 /* Remove existing entries */ 187 QLIST_FOREACH_SAFE(d, &s->data_def, node, next) { 188 QLIST_REMOVE(d, node); 189 } 190 191 applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03"); 192 applesmc_add_key(s, "OSK0", 32, s->osk); 193 applesmc_add_key(s, "OSK1", 32, s->osk + 32); 194 applesmc_add_key(s, "NATJ", 1, "\0"); 195 applesmc_add_key(s, "MSSP", 1, "\0"); 196 applesmc_add_key(s, "MSSD", 1, "\0x3"); 197 } 198 199 static int applesmc_isa_init(ISADevice *dev) 200 { 201 struct AppleSMCStatus *s = DO_UPCAST(struct AppleSMCStatus, dev, dev); 202 203 register_ioport_read(s->iobase + APPLESMC_DATA_PORT, 4, 1, 204 applesmc_io_data_readb, s); 205 register_ioport_read(s->iobase + APPLESMC_CMD_PORT, 4, 1, 206 applesmc_io_cmd_readb, s); 207 register_ioport_write(s->iobase + APPLESMC_DATA_PORT, 4, 1, 208 applesmc_io_data_writeb, s); 209 register_ioport_write(s->iobase + APPLESMC_CMD_PORT, 4, 1, 210 applesmc_io_cmd_writeb, s); 211 212 if (!s->osk || (strlen(s->osk) != 64)) { 213 fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n"); 214 s->osk = default_osk; 215 } 216 217 QLIST_INIT(&s->data_def); 218 qdev_applesmc_isa_reset(&dev->qdev); 219 220 return 0; 221 } 222 223 static Property applesmc_isa_properties[] = { 224 DEFINE_PROP_HEX32("iobase", struct AppleSMCStatus, iobase, 225 APPLESMC_DEFAULT_IOBASE), 226 DEFINE_PROP_STRING("osk", struct AppleSMCStatus, osk), 227 DEFINE_PROP_END_OF_LIST(), 228 }; 229 230 static void qdev_applesmc_class_init(ObjectClass *klass, void *data) 231 { 232 DeviceClass *dc = DEVICE_CLASS(klass); 233 ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); 234 ic->init = applesmc_isa_init; 235 dc->reset = qdev_applesmc_isa_reset; 236 dc->props = applesmc_isa_properties; 237 } 238 239 static const TypeInfo applesmc_isa_info = { 240 .name = "isa-applesmc", 241 .parent = TYPE_ISA_DEVICE, 242 .instance_size = sizeof(struct AppleSMCStatus), 243 .class_init = qdev_applesmc_class_init, 244 }; 245 246 static void applesmc_register_types(void) 247 { 248 type_register_static(&applesmc_isa_info); 249 } 250 251 type_init(applesmc_register_types) 252