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 #define TYPE_APPLE_SMC "isa-applesmc" 70 #define APPLE_SMC(obj) OBJECT_CHECK(AppleSMCState, (obj), TYPE_APPLE_SMC) 71 72 typedef struct AppleSMCState AppleSMCState; 73 struct AppleSMCState { 74 ISADevice parent_obj; 75 76 uint32_t iobase; 77 uint8_t cmd; 78 uint8_t status; 79 uint8_t key[4]; 80 uint8_t read_pos; 81 uint8_t data_len; 82 uint8_t data_pos; 83 uint8_t data[255]; 84 uint8_t charactic[4]; 85 char *osk; 86 QLIST_HEAD(, AppleSMCData) data_def; 87 }; 88 89 static void applesmc_io_cmd_writeb(void *opaque, uint32_t addr, uint32_t val) 90 { 91 AppleSMCState *s = opaque; 92 93 smc_debug("CMD Write B: %#x = %#x\n", addr, val); 94 switch(val) { 95 case APPLESMC_READ_CMD: 96 s->status = 0x0c; 97 break; 98 } 99 s->cmd = val; 100 s->read_pos = 0; 101 s->data_pos = 0; 102 } 103 104 static void applesmc_fill_data(AppleSMCState *s) 105 { 106 struct AppleSMCData *d; 107 108 QLIST_FOREACH(d, &s->data_def, node) { 109 if (!memcmp(d->key, s->key, 4)) { 110 smc_debug("Key matched (%s Len=%d Data=%s)\n", d->key, 111 d->len, d->data); 112 memcpy(s->data, d->data, d->len); 113 return; 114 } 115 } 116 } 117 118 static void applesmc_io_data_writeb(void *opaque, uint32_t addr, uint32_t val) 119 { 120 AppleSMCState *s = opaque; 121 122 smc_debug("DATA Write B: %#x = %#x\n", addr, val); 123 switch(s->cmd) { 124 case APPLESMC_READ_CMD: 125 if(s->read_pos < 4) { 126 s->key[s->read_pos] = val; 127 s->status = 0x04; 128 } else if(s->read_pos == 4) { 129 s->data_len = val; 130 s->status = 0x05; 131 s->data_pos = 0; 132 smc_debug("Key = %c%c%c%c Len = %d\n", s->key[0], 133 s->key[1], s->key[2], s->key[3], val); 134 applesmc_fill_data(s); 135 } 136 s->read_pos++; 137 break; 138 } 139 } 140 141 static uint32_t applesmc_io_data_readb(void *opaque, uint32_t addr1) 142 { 143 AppleSMCState *s = opaque; 144 uint8_t retval = 0; 145 146 switch(s->cmd) { 147 case APPLESMC_READ_CMD: 148 if(s->data_pos < s->data_len) { 149 retval = s->data[s->data_pos]; 150 smc_debug("READ_DATA[%d] = %#hhx\n", s->data_pos, 151 retval); 152 s->data_pos++; 153 if(s->data_pos == s->data_len) { 154 s->status = 0x00; 155 smc_debug("EOF\n"); 156 } else 157 s->status = 0x05; 158 } 159 } 160 smc_debug("DATA Read b: %#x = %#x\n", addr1, retval); 161 162 return retval; 163 } 164 165 static uint32_t applesmc_io_cmd_readb(void *opaque, uint32_t addr1) 166 { 167 AppleSMCState *s = opaque; 168 169 smc_debug("CMD Read B: %#x\n", addr1); 170 return s->status; 171 } 172 173 static void applesmc_add_key(AppleSMCState *s, const char *key, 174 int len, const char *data) 175 { 176 struct AppleSMCData *def; 177 178 def = g_malloc0(sizeof(struct AppleSMCData)); 179 def->key = key; 180 def->len = len; 181 def->data = data; 182 183 QLIST_INSERT_HEAD(&s->data_def, def, node); 184 } 185 186 static void qdev_applesmc_isa_reset(DeviceState *dev) 187 { 188 AppleSMCState *s = APPLE_SMC(dev); 189 struct AppleSMCData *d, *next; 190 191 /* Remove existing entries */ 192 QLIST_FOREACH_SAFE(d, &s->data_def, node, next) { 193 QLIST_REMOVE(d, node); 194 } 195 196 applesmc_add_key(s, "REV ", 6, "\x01\x13\x0f\x00\x00\x03"); 197 applesmc_add_key(s, "OSK0", 32, s->osk); 198 applesmc_add_key(s, "OSK1", 32, s->osk + 32); 199 applesmc_add_key(s, "NATJ", 1, "\0"); 200 applesmc_add_key(s, "MSSP", 1, "\0"); 201 applesmc_add_key(s, "MSSD", 1, "\0x3"); 202 } 203 204 static int applesmc_isa_init(ISADevice *dev) 205 { 206 AppleSMCState *s = APPLE_SMC(dev); 207 208 register_ioport_read(s->iobase + APPLESMC_DATA_PORT, 4, 1, 209 applesmc_io_data_readb, s); 210 register_ioport_read(s->iobase + APPLESMC_CMD_PORT, 4, 1, 211 applesmc_io_cmd_readb, s); 212 register_ioport_write(s->iobase + APPLESMC_DATA_PORT, 4, 1, 213 applesmc_io_data_writeb, s); 214 register_ioport_write(s->iobase + APPLESMC_CMD_PORT, 4, 1, 215 applesmc_io_cmd_writeb, s); 216 217 if (!s->osk || (strlen(s->osk) != 64)) { 218 fprintf(stderr, "WARNING: Using AppleSMC with invalid key\n"); 219 s->osk = default_osk; 220 } 221 222 QLIST_INIT(&s->data_def); 223 qdev_applesmc_isa_reset(&dev->qdev); 224 225 return 0; 226 } 227 228 static Property applesmc_isa_properties[] = { 229 DEFINE_PROP_HEX32("iobase", AppleSMCState, iobase, 230 APPLESMC_DEFAULT_IOBASE), 231 DEFINE_PROP_STRING("osk", AppleSMCState, osk), 232 DEFINE_PROP_END_OF_LIST(), 233 }; 234 235 static void qdev_applesmc_class_init(ObjectClass *klass, void *data) 236 { 237 DeviceClass *dc = DEVICE_CLASS(klass); 238 ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); 239 ic->init = applesmc_isa_init; 240 dc->reset = qdev_applesmc_isa_reset; 241 dc->props = applesmc_isa_properties; 242 } 243 244 static const TypeInfo applesmc_isa_info = { 245 .name = TYPE_APPLE_SMC, 246 .parent = TYPE_ISA_DEVICE, 247 .instance_size = sizeof(AppleSMCState), 248 .class_init = qdev_applesmc_class_init, 249 }; 250 251 static void applesmc_register_types(void) 252 { 253 type_register_static(&applesmc_isa_info); 254 } 255 256 type_init(applesmc_register_types) 257