pc87312.c (10450B)
1 /* 2 * QEMU National Semiconductor PC87312 (Super I/O) 3 * 4 * Copyright (c) 2010-2012 Herve Poussineau 5 * Copyright (c) 2011-2012 Andreas Färber 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a copy 8 * of this software and associated documentation files (the "Software"), to deal 9 * in the Software without restriction, including without limitation the rights 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 11 * copies of the Software, and to permit persons to whom the Software is 12 * furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice shall be included in 15 * all copies or substantial portions of the Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 23 * THE SOFTWARE. 24 */ 25 26 #include "qemu/osdep.h" 27 #include "hw/isa/pc87312.h" 28 #include "hw/qdev-properties.h" 29 #include "migration/vmstate.h" 30 #include "qapi/error.h" 31 #include "qemu/error-report.h" 32 #include "qemu/module.h" 33 #include "trace.h" 34 35 36 #define REG_FER 0 37 #define REG_FAR 1 38 #define REG_PTR 2 39 40 #define FER_PARALLEL_EN 0x01 41 #define FER_UART1_EN 0x02 42 #define FER_UART2_EN 0x04 43 #define FER_FDC_EN 0x08 44 #define FER_FDC_4 0x10 45 #define FER_FDC_ADDR 0x20 46 #define FER_IDE_EN 0x40 47 #define FER_IDE_ADDR 0x80 48 49 #define FAR_PARALLEL_ADDR 0x03 50 #define FAR_UART1_ADDR 0x0C 51 #define FAR_UART2_ADDR 0x30 52 #define FAR_UART_3_4 0xC0 53 54 #define PTR_POWER_DOWN 0x01 55 #define PTR_CLOCK_DOWN 0x02 56 #define PTR_PWDN 0x04 57 #define PTR_IRQ_5_7 0x08 58 #define PTR_UART1_TEST 0x10 59 #define PTR_UART2_TEST 0x20 60 #define PTR_LOCK_CONF 0x40 61 #define PTR_EPP_MODE 0x80 62 63 64 /* Parallel port */ 65 66 static bool is_parallel_enabled(ISASuperIODevice *sio, uint8_t index) 67 { 68 PC87312State *s = PC87312(sio); 69 return index ? false : s->regs[REG_FER] & FER_PARALLEL_EN; 70 } 71 72 static const uint16_t parallel_base[] = { 0x378, 0x3bc, 0x278, 0x00 }; 73 74 static uint16_t get_parallel_iobase(ISASuperIODevice *sio, uint8_t index) 75 { 76 PC87312State *s = PC87312(sio); 77 return parallel_base[s->regs[REG_FAR] & FAR_PARALLEL_ADDR]; 78 } 79 80 static const unsigned int parallel_irq[] = { 5, 7, 5, 0 }; 81 82 static unsigned int get_parallel_irq(ISASuperIODevice *sio, uint8_t index) 83 { 84 PC87312State *s = PC87312(sio); 85 int idx; 86 idx = (s->regs[REG_FAR] & FAR_PARALLEL_ADDR); 87 if (idx == 0) { 88 return (s->regs[REG_PTR] & PTR_IRQ_5_7) ? 7 : 5; 89 } else { 90 return parallel_irq[idx]; 91 } 92 } 93 94 95 /* UARTs */ 96 97 static const uint16_t uart_base[2][4] = { 98 { 0x3e8, 0x338, 0x2e8, 0x220 }, 99 { 0x2e8, 0x238, 0x2e0, 0x228 } 100 }; 101 102 static uint16_t get_uart_iobase(ISASuperIODevice *sio, uint8_t i) 103 { 104 PC87312State *s = PC87312(sio); 105 int idx; 106 idx = (s->regs[REG_FAR] >> (2 * i + 2)) & 0x3; 107 if (idx == 0) { 108 return 0x3f8; 109 } else if (idx == 1) { 110 return 0x2f8; 111 } else { 112 return uart_base[idx & 1][(s->regs[REG_FAR] & FAR_UART_3_4) >> 6]; 113 } 114 } 115 116 static unsigned int get_uart_irq(ISASuperIODevice *sio, uint8_t i) 117 { 118 PC87312State *s = PC87312(sio); 119 int idx; 120 idx = (s->regs[REG_FAR] >> (2 * i + 2)) & 0x3; 121 return (idx & 1) ? 3 : 4; 122 } 123 124 static bool is_uart_enabled(ISASuperIODevice *sio, uint8_t i) 125 { 126 PC87312State *s = PC87312(sio); 127 return s->regs[REG_FER] & (FER_UART1_EN << i); 128 } 129 130 131 /* Floppy controller */ 132 133 static bool is_fdc_enabled(ISASuperIODevice *sio, uint8_t index) 134 { 135 PC87312State *s = PC87312(sio); 136 assert(!index); 137 return s->regs[REG_FER] & FER_FDC_EN; 138 } 139 140 static uint16_t get_fdc_iobase(ISASuperIODevice *sio, uint8_t index) 141 { 142 PC87312State *s = PC87312(sio); 143 assert(!index); 144 return (s->regs[REG_FER] & FER_FDC_ADDR) ? 0x370 : 0x3f0; 145 } 146 147 static unsigned int get_fdc_irq(ISASuperIODevice *sio, uint8_t index) 148 { 149 assert(!index); 150 return 6; 151 } 152 153 154 /* IDE controller */ 155 156 static bool is_ide_enabled(ISASuperIODevice *sio, uint8_t index) 157 { 158 PC87312State *s = PC87312(sio); 159 160 return s->regs[REG_FER] & FER_IDE_EN; 161 } 162 163 static uint16_t get_ide_iobase(ISASuperIODevice *sio, uint8_t index) 164 { 165 PC87312State *s = PC87312(sio); 166 167 if (index == 1) { 168 return get_ide_iobase(sio, 0) + 0x206; 169 } 170 return (s->regs[REG_FER] & FER_IDE_ADDR) ? 0x170 : 0x1f0; 171 } 172 173 static unsigned int get_ide_irq(ISASuperIODevice *sio, uint8_t index) 174 { 175 assert(index == 0); 176 return 14; 177 } 178 179 static void reconfigure_devices(PC87312State *s) 180 { 181 error_report("pc87312: unsupported device reconfiguration (%02x %02x %02x)", 182 s->regs[REG_FER], s->regs[REG_FAR], s->regs[REG_PTR]); 183 } 184 185 static void pc87312_soft_reset(PC87312State *s) 186 { 187 static const uint8_t fer_init[] = { 188 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4b, 0x4b, 189 0x4b, 0x4b, 0x4b, 0x4b, 0x0f, 0x0f, 0x0f, 0x0f, 190 0x49, 0x49, 0x49, 0x49, 0x07, 0x07, 0x07, 0x07, 191 0x47, 0x47, 0x47, 0x47, 0x47, 0x47, 0x08, 0x00, 192 }; 193 static const uint8_t far_init[] = { 194 0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x00, 0x01, 195 0x01, 0x09, 0x08, 0x08, 0x10, 0x11, 0x39, 0x24, 196 0x00, 0x01, 0x01, 0x00, 0x10, 0x11, 0x39, 0x24, 197 0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x10, 0x10, 198 }; 199 static const uint8_t ptr_init[] = { 200 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 201 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 202 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 203 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 204 }; 205 206 s->read_id_step = 0; 207 s->selected_index = REG_FER; 208 209 s->regs[REG_FER] = fer_init[s->config & 0x1f]; 210 s->regs[REG_FAR] = far_init[s->config & 0x1f]; 211 s->regs[REG_PTR] = ptr_init[s->config & 0x1f]; 212 } 213 214 static void pc87312_hard_reset(PC87312State *s) 215 { 216 pc87312_soft_reset(s); 217 } 218 219 static void pc87312_io_write(void *opaque, hwaddr addr, uint64_t val, 220 unsigned int size) 221 { 222 PC87312State *s = opaque; 223 224 trace_pc87312_io_write(addr, val); 225 226 if ((addr & 1) == 0) { 227 /* Index register */ 228 s->read_id_step = 2; 229 s->selected_index = val; 230 } else { 231 /* Data register */ 232 if (s->selected_index < 3) { 233 s->regs[s->selected_index] = val; 234 reconfigure_devices(s); 235 } 236 } 237 } 238 239 static uint64_t pc87312_io_read(void *opaque, hwaddr addr, unsigned int size) 240 { 241 PC87312State *s = opaque; 242 uint32_t val; 243 244 if ((addr & 1) == 0) { 245 /* Index register */ 246 if (s->read_id_step++ == 0) { 247 val = 0x88; 248 } else if (s->read_id_step++ == 1) { 249 val = 0; 250 } else { 251 val = s->selected_index; 252 } 253 } else { 254 /* Data register */ 255 if (s->selected_index < 3) { 256 val = s->regs[s->selected_index]; 257 } else { 258 /* Invalid selected index */ 259 val = 0; 260 } 261 } 262 263 trace_pc87312_io_read(addr, val); 264 return val; 265 } 266 267 static const MemoryRegionOps pc87312_io_ops = { 268 .read = pc87312_io_read, 269 .write = pc87312_io_write, 270 .endianness = DEVICE_LITTLE_ENDIAN, 271 .valid = { 272 .min_access_size = 1, 273 .max_access_size = 1, 274 }, 275 }; 276 277 static int pc87312_post_load(void *opaque, int version_id) 278 { 279 PC87312State *s = opaque; 280 281 reconfigure_devices(s); 282 return 0; 283 } 284 285 static void pc87312_reset(DeviceState *d) 286 { 287 PC87312State *s = PC87312(d); 288 289 pc87312_soft_reset(s); 290 } 291 292 static void pc87312_realize(DeviceState *dev, Error **errp) 293 { 294 PC87312State *s; 295 ISADevice *isa; 296 Error *local_err = NULL; 297 298 s = PC87312(dev); 299 isa = ISA_DEVICE(dev); 300 isa_register_ioport(isa, &s->io, s->iobase); 301 pc87312_hard_reset(s); 302 303 ISA_SUPERIO_GET_CLASS(dev)->parent_realize(dev, &local_err); 304 if (local_err) { 305 error_propagate(errp, local_err); 306 return; 307 } 308 } 309 310 static void pc87312_initfn(Object *obj) 311 { 312 PC87312State *s = PC87312(obj); 313 314 memory_region_init_io(&s->io, obj, &pc87312_io_ops, s, "pc87312", 2); 315 } 316 317 static const VMStateDescription vmstate_pc87312 = { 318 .name = "pc87312", 319 .version_id = 1, 320 .minimum_version_id = 1, 321 .post_load = pc87312_post_load, 322 .fields = (VMStateField[]) { 323 VMSTATE_UINT8(read_id_step, PC87312State), 324 VMSTATE_UINT8(selected_index, PC87312State), 325 VMSTATE_UINT8_ARRAY(regs, PC87312State, 3), 326 VMSTATE_END_OF_LIST() 327 } 328 }; 329 330 static Property pc87312_properties[] = { 331 DEFINE_PROP_UINT16("iobase", PC87312State, iobase, 0x398), 332 DEFINE_PROP_UINT8("config", PC87312State, config, 1), 333 DEFINE_PROP_END_OF_LIST() 334 }; 335 336 static void pc87312_class_init(ObjectClass *klass, void *data) 337 { 338 DeviceClass *dc = DEVICE_CLASS(klass); 339 ISASuperIOClass *sc = ISA_SUPERIO_CLASS(klass); 340 341 sc->parent_realize = dc->realize; 342 dc->realize = pc87312_realize; 343 dc->reset = pc87312_reset; 344 dc->vmsd = &vmstate_pc87312; 345 device_class_set_props(dc, pc87312_properties); 346 347 sc->parallel = (ISASuperIOFuncs){ 348 .count = 1, 349 .is_enabled = is_parallel_enabled, 350 .get_iobase = get_parallel_iobase, 351 .get_irq = get_parallel_irq, 352 }; 353 sc->serial = (ISASuperIOFuncs){ 354 .count = 2, 355 .is_enabled = is_uart_enabled, 356 .get_iobase = get_uart_iobase, 357 .get_irq = get_uart_irq, 358 }; 359 sc->floppy = (ISASuperIOFuncs){ 360 .count = 1, 361 .is_enabled = is_fdc_enabled, 362 .get_iobase = get_fdc_iobase, 363 .get_irq = get_fdc_irq, 364 }; 365 sc->ide = (ISASuperIOFuncs){ 366 .count = 1, 367 .is_enabled = is_ide_enabled, 368 .get_iobase = get_ide_iobase, 369 .get_irq = get_ide_irq, 370 }; 371 } 372 373 static const TypeInfo pc87312_type_info = { 374 .name = TYPE_PC87312, 375 .parent = TYPE_ISA_SUPERIO, 376 .instance_size = sizeof(PC87312State), 377 .instance_init = pc87312_initfn, 378 .class_init = pc87312_class_init, 379 /* FIXME use a qdev drive property instead of drive_get() */ 380 }; 381 382 static void pc87312_register_types(void) 383 { 384 type_register_static(&pc87312_type_info); 385 } 386 387 type_init(pc87312_register_types)