hw/isa/pc87312.c

   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 "qapi/error.h"
  29 #include "qemu/error-report.h"
  30 #include "sysemu/block-backend.h"
  31 #include "sysemu/blockdev.h"
  32 #include "sysemu/sysemu.h"
  33 #include "chardev/char.h"
  34 #include "trace.h"
  35
  36
  37 #define REG_FER 0
  38 #define REG_FAR 1
  39 #define REG_PTR 2
  40
  41 #define FER_PARALLEL_EN   0x01
  42 #define FER_UART1_EN      0x02
  43 #define FER_UART2_EN      0x04
  44 #define FER_FDC_EN        0x08
  45 #define FER_FDC_4         0x10
  46 #define FER_FDC_ADDR      0x20
  47 #define FER_IDE_EN        0x40
  48 #define FER_IDE_ADDR      0x80
  49
  50 #define FAR_PARALLEL_ADDR 0x03
  51 #define FAR_UART1_ADDR    0x0C
  52 #define FAR_UART2_ADDR    0x30
  53 #define FAR_UART_3_4      0xC0
  54
  55 #define PTR_POWER_DOWN    0x01
  56 #define PTR_CLOCK_DOWN    0x02
  57 #define PTR_PWDN          0x04
  58 #define PTR_IRQ_5_7       0x08
  59 #define PTR_UART1_TEST    0x10
  60 #define PTR_UART2_TEST    0x20
  61 #define PTR_LOCK_CONF     0x40
  62 #define PTR_EPP_MODE      0x80
  63
  64
  65 /* Parallel port */
  66
  67 static inline bool is_parallel_enabled(PC87312State *s)
  68 {
  69     return s->regs[REG_FER] & FER_PARALLEL_EN;
  70 }
  71
  72 static const uint32_t parallel_base[] = { 0x378, 0x3bc, 0x278, 0x00 };
  73
  74 static inline uint32_t get_parallel_iobase(PC87312State *s)
  75 {
  76     return parallel_base[s->regs[REG_FAR] & FAR_PARALLEL_ADDR];
  77 }
  78
  79 static const uint32_t parallel_irq[] = { 5, 7, 5, 0 };
  80
  81 static inline uint32_t get_parallel_irq(PC87312State *s)
  82 {
  83     int idx;
  84     idx = (s->regs[REG_FAR] & FAR_PARALLEL_ADDR);
  85     if (idx == 0) {
  86         return (s->regs[REG_PTR] & PTR_IRQ_5_7) ? 7 : 5;
  87     } else {
  88         return parallel_irq[idx];
  89     }
  90 }
  91
  92
  93 /* UARTs */
  94
  95 static const uint32_t uart_base[2][4] = {
  96     { 0x3e8, 0x338, 0x2e8, 0x220 },
  97     { 0x2e8, 0x238, 0x2e0, 0x228 }
  98 };
  99
 100 static inline uint32_t get_uart_iobase(PC87312State *s, int i)
 101 {
 102     int idx;
 103     idx = (s->regs[REG_FAR] >> (2 * i + 2)) & 0x3;
 104     if (idx == 0) {
 105         return 0x3f8;
 106     } else if (idx == 1) {
 107         return 0x2f8;
 108     } else {
 109         return uart_base[idx & 1][(s->regs[REG_FAR] & FAR_UART_3_4) >> 6];
 110     }
 111 }
 112
 113 static inline uint32_t get_uart_irq(PC87312State *s, int i)
 114 {
 115     int idx;
 116     idx = (s->regs[REG_FAR] >> (2 * i + 2)) & 0x3;
 117     return (idx & 1) ? 3 : 4;
 118 }
 119
 120 static inline bool is_uart_enabled(PC87312State *s, int i)
 121 {
 122     return s->regs[REG_FER] & (FER_UART1_EN << i);
 123 }
 124
 125
 126 /* Floppy controller */
 127
 128 static inline bool is_fdc_enabled(PC87312State *s)
 129 {
 130     return s->regs[REG_FER] & FER_FDC_EN;
 131 }
 132
 133 static inline uint32_t get_fdc_iobase(PC87312State *s)
 134 {
 135     return (s->regs[REG_FER] & FER_FDC_ADDR) ? 0x370 : 0x3f0;
 136 }
 137
 138
 139 /* IDE controller */
 140
 141 static inline bool is_ide_enabled(PC87312State *s)
 142 {
 143     return s->regs[REG_FER] & FER_IDE_EN;
 144 }
 145
 146 static inline uint32_t get_ide_iobase(PC87312State *s)
 147 {
 148     return (s->regs[REG_FER] & FER_IDE_ADDR) ? 0x170 : 0x1f0;
 149 }
 150
 151
 152 static void reconfigure_devices(PC87312State *s)
 153 {
 154     error_report("pc87312: unsupported device reconfiguration (%02x %02x %02x)",
 155                  s->regs[REG_FER], s->regs[REG_FAR], s->regs[REG_PTR]);
 156 }
 157
 158 static void pc87312_soft_reset(PC87312State *s)
 159 {
 160     static const uint8_t fer_init[] = {
 161         0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4f, 0x4b, 0x4b,
 162         0x4b, 0x4b, 0x4b, 0x4b, 0x0f, 0x0f, 0x0f, 0x0f,
 163         0x49, 0x49, 0x49, 0x49, 0x07, 0x07, 0x07, 0x07,
 164         0x47, 0x47, 0x47, 0x47, 0x47, 0x47, 0x08, 0x00,
 165     };
 166     static const uint8_t far_init[] = {
 167         0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x00, 0x01,
 168         0x01, 0x09, 0x08, 0x08, 0x10, 0x11, 0x39, 0x24,
 169         0x00, 0x01, 0x01, 0x00, 0x10, 0x11, 0x39, 0x24,
 170         0x10, 0x11, 0x11, 0x39, 0x24, 0x38, 0x10, 0x10,
 171     };
 172     static const uint8_t ptr_init[] = {
 173         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 174         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 175         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 176         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02,
 177     };
 178
 179     s->read_id_step = 0;
 180     s->selected_index = REG_FER;
 181
 182     s->regs[REG_FER] = fer_init[s->config & 0x1f];
 183     s->regs[REG_FAR] = far_init[s->config & 0x1f];
 184     s->regs[REG_PTR] = ptr_init[s->config & 0x1f];
 185 }
 186
 187 static void pc87312_hard_reset(PC87312State *s)
 188 {
 189     pc87312_soft_reset(s);
 190 }
 191
 192 static void pc87312_io_write(void *opaque, hwaddr addr, uint64_t val,
 193                              unsigned int size)
 194 {
 195     PC87312State *s = opaque;
 196
 197     trace_pc87312_io_write(addr, val);
 198
 199     if ((addr & 1) == 0) {
 200         /* Index register */
 201         s->read_id_step = 2;
 202         s->selected_index = val;
 203     } else {
 204         /* Data register */
 205         if (s->selected_index < 3) {
 206             s->regs[s->selected_index] = val;
 207             reconfigure_devices(s);
 208         }
 209     }
 210 }
 211
 212 static uint64_t pc87312_io_read(void *opaque, hwaddr addr, unsigned int size)
 213 {
 214     PC87312State *s = opaque;
 215     uint32_t val;
 216
 217     if ((addr & 1) == 0) {
 218         /* Index register */
 219         if (s->read_id_step++ == 0) {
 220             val = 0x88;
 221         } else if (s->read_id_step++ == 1) {
 222             val = 0;
 223         } else {
 224             val = s->selected_index;
 225         }
 226     } else {
 227         /* Data register */
 228         if (s->selected_index < 3) {
 229             val = s->regs[s->selected_index];
 230         } else {
 231             /* Invalid selected index */
 232             val = 0;
 233         }
 234     }
 235
 236     trace_pc87312_io_read(addr, val);
 237     return val;
 238 }
 239
 240 static const MemoryRegionOps pc87312_io_ops = {
 241     .read  = pc87312_io_read,
 242     .write = pc87312_io_write,
 243     .endianness = DEVICE_LITTLE_ENDIAN,
 244     .valid = {
 245         .min_access_size = 1,
 246         .max_access_size = 1,
 247     },
 248 };
 249
 250 static int pc87312_post_load(void *opaque, int version_id)
 251 {
 252     PC87312State *s = opaque;
 253
 254     reconfigure_devices(s);
 255     return 0;
 256 }
 257
 258 static void pc87312_reset(DeviceState *d)
 259 {
 260     PC87312State *s = PC87312(d);
 261
 262     pc87312_soft_reset(s);
 263 }
 264
 265 static void pc87312_realize(DeviceState *dev, Error **errp)
 266 {
 267     PC87312State *s;
 268     DeviceState *d;
 269     ISADevice *isa;
 270     ISABus *bus;
 271     Chardev *chr;
 272     DriveInfo *drive;
 273     char name[5];
 274     int i;
 275
 276     s = PC87312(dev);
 277     isa = ISA_DEVICE(dev);
 278     bus = isa_bus_from_device(isa);
 279     isa_register_ioport(isa, &s->io, s->iobase);
 280     pc87312_hard_reset(s);
 281
 282     if (is_parallel_enabled(s)) {
 283         /* FIXME use a qdev chardev prop instead of parallel_hds[] */
 284         chr = parallel_hds[0];
 285         if (chr == NULL) {
 286             chr = qemu_chr_new("par0", "null");
 287         }
 288         isa = isa_create(bus, "isa-parallel");
 289         d = DEVICE(isa);
 290         qdev_prop_set_uint32(d, "index", 0);
 291         qdev_prop_set_uint32(d, "iobase", get_parallel_iobase(s));
 292         qdev_prop_set_uint32(d, "irq", get_parallel_irq(s));
 293         qdev_prop_set_chr(d, "chardev", chr);
 294         qdev_init_nofail(d);
 295         s->parallel.dev = isa;
 296         trace_pc87312_info_parallel(get_parallel_iobase(s),
 297                                     get_parallel_irq(s));
 298     }
 299
 300     for (i = 0; i < 2; i++) {
 301         if (is_uart_enabled(s, i)) {
 302             /* FIXME use a qdev chardev prop instead of serial_hds[] */
 303             chr = serial_hds[i];
 304             if (chr == NULL) {
 305                 snprintf(name, sizeof(name), "ser%d", i);
 306                 chr = qemu_chr_new(name, "null");
 307             }
 308             isa = isa_create(bus, "isa-serial");
 309             d = DEVICE(isa);
 310             qdev_prop_set_uint32(d, "index", i);
 311             qdev_prop_set_uint32(d, "iobase", get_uart_iobase(s, i));
 312             qdev_prop_set_uint32(d, "irq", get_uart_irq(s, i));
 313             qdev_prop_set_chr(d, "chardev", chr);
 314             qdev_init_nofail(d);
 315             s->uart[i].dev = isa;
 316             trace_pc87312_info_serial(i, get_uart_iobase(s, i),
 317                                       get_uart_irq(s, i));
 318         }
 319     }
 320
 321     if (is_fdc_enabled(s)) {
 322         isa = isa_create(bus, "isa-fdc");
 323         d = DEVICE(isa);
 324         qdev_prop_set_uint32(d, "iobase", get_fdc_iobase(s));
 325         qdev_prop_set_uint32(d, "irq", 6);
 326         /* FIXME use a qdev drive property instead of drive_get() */
 327         drive = drive_get(IF_FLOPPY, 0, 0);
 328         if (drive != NULL) {
 329             qdev_prop_set_drive(d, "driveA", blk_by_legacy_dinfo(drive),
 330                                 &error_fatal);
 331         }
 332         /* FIXME use a qdev drive property instead of drive_get() */
 333         drive = drive_get(IF_FLOPPY, 0, 1);
 334         if (drive != NULL) {
 335             qdev_prop_set_drive(d, "driveB", blk_by_legacy_dinfo(drive),
 336                                 &error_fatal);
 337         }
 338         qdev_init_nofail(d);
 339         s->fdc.dev = isa;
 340         trace_pc87312_info_floppy(get_fdc_iobase(s));
 341     }
 342
 343     if (is_ide_enabled(s)) {
 344         isa = isa_create(bus, "isa-ide");
 345         d = DEVICE(isa);
 346         qdev_prop_set_uint32(d, "iobase", get_ide_iobase(s));
 347         qdev_prop_set_uint32(d, "iobase2", get_ide_iobase(s) + 0x206);
 348         qdev_prop_set_uint32(d, "irq", 14);
 349         qdev_init_nofail(d);
 350         s->ide.dev = isa;
 351         trace_pc87312_info_ide(get_ide_iobase(s));
 352     }
 353 }
 354
 355 static void pc87312_initfn(Object *obj)
 356 {
 357     PC87312State *s = PC87312(obj);
 358
 359     memory_region_init_io(&s->io, obj, &pc87312_io_ops, s, "pc87312", 2);
 360 }
 361
 362 static const VMStateDescription vmstate_pc87312 = {
 363     .name = "pc87312",
 364     .version_id = 1,
 365     .minimum_version_id = 1,
 366     .post_load = pc87312_post_load,
 367     .fields = (VMStateField[]) {
 368         VMSTATE_UINT8(read_id_step, PC87312State),
 369         VMSTATE_UINT8(selected_index, PC87312State),
 370         VMSTATE_UINT8_ARRAY(regs, PC87312State, 3),
 371         VMSTATE_END_OF_LIST()
 372     }
 373 };
 374
 375 static Property pc87312_properties[] = {
 376     DEFINE_PROP_UINT32("iobase", PC87312State, iobase, 0x398),
 377     DEFINE_PROP_UINT8("config", PC87312State, config, 1),
 378     DEFINE_PROP_END_OF_LIST()
 379 };
 380
 381 static void pc87312_class_init(ObjectClass *klass, void *data)
 382 {
 383     DeviceClass *dc = DEVICE_CLASS(klass);
 384
 385     dc->realize = pc87312_realize;
 386     dc->reset = pc87312_reset;
 387     dc->vmsd = &vmstate_pc87312;
 388     dc->props = pc87312_properties;
 389     /* Reason: Uses parallel_hds[0] in realize(), so it can't be used twice */
 390     dc->user_creatable = false;
 391 }
 392
 393 static const TypeInfo pc87312_type_info = {
 394     .name          = TYPE_PC87312,
 395     .parent        = TYPE_ISA_DEVICE,
 396     .instance_size = sizeof(PC87312State),
 397     .instance_init = pc87312_initfn,
 398     .class_init    = pc87312_class_init,
 399 };
 400
 401 static void pc87312_register_types(void)
 402 {
 403     type_register_static(&pc87312_type_info);
 404 }
 405
 406 type_init(pc87312_register_types)