LXR qemu/hw/block/fdc-isa.c

   1/*
   2 * QEMU Floppy disk emulator (Intel 82078)
   3 *
   4 * Copyright (c) 2003, 2007 Jocelyn Mayer
   5 * Copyright (c) 2008 Hervé Poussineau
   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 * The controller is used in Sun4m systems in a slightly different
  27 * way. There are changes in DOR register and DMA is not available.
  28 */
  29
  30#include "qemu/osdep.h"
  31#include "hw/block/fdc.h"
  32#include "qapi/error.h"
  33#include "qemu/error-report.h"
  34#include "qemu/timer.h"
  35#include "hw/acpi/aml-build.h"
  36#include "hw/irq.h"
  37#include "hw/isa/isa.h"
  38#include "hw/qdev-properties.h"
  39#include "hw/qdev-properties-system.h"
  40#include "migration/vmstate.h"
  41#include "hw/block/block.h"
  42#include "sysemu/block-backend.h"
  43#include "sysemu/blockdev.h"
  44#include "sysemu/sysemu.h"
  45#include "qemu/log.h"
  46#include "qemu/main-loop.h"
  47#include "qemu/module.h"
  48#include "trace.h"
  49#include "qom/object.h"
  50#include "fdc-internal.h"
  51
  52OBJECT_DECLARE_SIMPLE_TYPE(FDCtrlISABus, ISA_FDC)
  53
  54struct FDCtrlISABus {
  55    /*< private >*/
  56    ISADevice parent_obj;
  57    /*< public >*/
  58
  59    uint32_t iobase;
  60    uint32_t irq;
  61    uint32_t dma;
  62    struct FDCtrl state;
  63    int32_t bootindexA;
  64    int32_t bootindexB;
  65};
  66
  67static void fdctrl_external_reset_isa(DeviceState *d)
  68{
  69    FDCtrlISABus *isa = ISA_FDC(d);
  70    FDCtrl *s = &isa->state;
  71
  72    fdctrl_reset(s, 0);
  73}
  74
  75void isa_fdc_init_drives(ISADevice *fdc, DriveInfo **fds)
  76{
  77    fdctrl_init_drives(&ISA_FDC(fdc)->state.bus, fds);
  78}
  79
  80static const MemoryRegionPortio fdc_portio_list[] = {
  81    { 1, 5, 1, .read = fdctrl_read, .write = fdctrl_write },
  82    { 7, 1, 1, .read = fdctrl_read, .write = fdctrl_write },
  83    PORTIO_END_OF_LIST(),
  84};
  85
  86static void isabus_fdc_realize(DeviceState *dev, Error **errp)
  87{
  88    ISADevice *isadev = ISA_DEVICE(dev);
  89    FDCtrlISABus *isa = ISA_FDC(dev);
  90    FDCtrl *fdctrl = &isa->state;
  91    Error *err = NULL;
  92
  93    isa_register_portio_list(isadev, &fdctrl->portio_list,
  94                             isa->iobase, fdc_portio_list, fdctrl,
  95                             "fdc");
  96
  97    isa_init_irq(isadev, &fdctrl->irq, isa->irq);
  98    fdctrl->dma_chann = isa->dma;
  99    if (fdctrl->dma_chann != -1) {
 100        IsaDmaClass *k;
 101        fdctrl->dma = isa_get_dma(isa_bus_from_device(isadev), isa->dma);
 102        if (!fdctrl->dma) {
 103            error_setg(errp, "ISA controller does not support DMA");
 104            return;
 105        }
 106        k = ISADMA_GET_CLASS(fdctrl->dma);
 107        k->register_channel(fdctrl->dma, fdctrl->dma_chann,
 108                            &fdctrl_transfer_handler, fdctrl);
 109    }
 110
 111    qdev_set_legacy_instance_id(dev, isa->iobase, 2);
 112
 113    fdctrl_realize_common(dev, fdctrl, &err);
 114    if (err != NULL) {
 115        error_propagate(errp, err);
 116        return;
 117    }
 118}
 119
 120FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i)
 121{
 122    FDCtrlISABus *isa = ISA_FDC(fdc);
 123
 124    return isa->state.drives[i].drive;
 125}
 126
 127static void isa_fdc_get_drive_max_chs(FloppyDriveType type, uint8_t *maxc,
 128                                      uint8_t *maxh, uint8_t *maxs)
 129{
 130    const FDFormat *fdf;
 131
 132    *maxc = *maxh = *maxs = 0;
 133    for (fdf = fd_formats; fdf->drive != FLOPPY_DRIVE_TYPE_NONE; fdf++) {
 134        if (fdf->drive != type) {
 135            continue;
 136        }
 137        if (*maxc < fdf->max_track) {
 138            *maxc = fdf->max_track;
 139        }
 140        if (*maxh < fdf->max_head) {
 141            *maxh = fdf->max_head;
 142        }
 143        if (*maxs < fdf->last_sect) {
 144            *maxs = fdf->last_sect;
 145        }
 146    }
 147    (*maxc)--;
 148}
 149
 150static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
 151{
 152    Aml *dev, *fdi;
 153    uint8_t maxc, maxh, maxs;
 154
 155    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);
 156
 157    dev = aml_device("FLP%c", 'A' + idx);
 158
 159    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));
 160
 161    fdi = aml_package(16);
 162    aml_append(fdi, aml_int(idx));  /* Drive Number */
 163    aml_append(fdi,
 164        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
 165    /*
 166     * the values below are the limits of the drive, and are thus independent
 167     * of the inserted media
 168     */
 169    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
 170    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
 171    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
 172    /*
 173     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
 174     * the drive type, so shall we
 175     */
 176    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
 177    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
 178    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
 179    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
 180    aml_append(fdi, aml_int(0x12));  /* disk_eot */
 181    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
 182    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
 183    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
 184    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
 185    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
 186    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */
 187
 188    aml_append(dev, aml_name_decl("_FDI", fdi));
 189    return dev;
 190}
 191
 192int cmos_get_fd_drive_type(FloppyDriveType fd0)
 193{
 194    int val;
 195
 196    switch (fd0) {
 197    case FLOPPY_DRIVE_TYPE_144:
 198        /* 1.44 Mb 3"5 drive */
 199        val = 4;
 200        break;
 201    case FLOPPY_DRIVE_TYPE_288:
 202        /* 2.88 Mb 3"5 drive */
 203        val = 5;
 204        break;
 205    case FLOPPY_DRIVE_TYPE_120:
 206        /* 1.2 Mb 5"5 drive */
 207        val = 2;
 208        break;
 209    case FLOPPY_DRIVE_TYPE_NONE:
 210    default:
 211        val = 0;
 212        break;
 213    }
 214    return val;
 215}
 216
 217static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
 218{
 219    Aml *dev;
 220    Aml *crs;
 221    int i;
 222
 223#define ACPI_FDE_MAX_FD 4
 224    uint32_t fde_buf[5] = {
 225        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
 226        cpu_to_le32(2)  /* tape presence (2 == never present) */
 227    };
 228
 229    crs = aml_resource_template();
 230    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
 231    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
 232    aml_append(crs, aml_irq_no_flags(6));
 233    aml_append(crs,
 234        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));
 235
 236    dev = aml_device("FDC0");
 237    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
 238    aml_append(dev, aml_name_decl("_CRS", crs));
 239
 240    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
 241        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);
 242
 243        if (type < FLOPPY_DRIVE_TYPE_NONE) {
 244            fde_buf[i] = cpu_to_le32(1);  /* drive present */
 245            aml_append(dev, build_fdinfo_aml(i, type));
 246        }
 247    }
 248    aml_append(dev, aml_name_decl("_FDE",
 249               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));
 250
 251    aml_append(scope, dev);
 252}
 253
 254static const VMStateDescription vmstate_isa_fdc = {
 255    .name = "fdc",
 256    .version_id = 2,
 257    .minimum_version_id = 2,
 258    .fields = (VMStateField[]) {
 259        VMSTATE_STRUCT(state, FDCtrlISABus, 0, vmstate_fdc, FDCtrl),
 260        VMSTATE_END_OF_LIST()
 261    }
 262};
 263
 264static Property isa_fdc_properties[] = {
 265    DEFINE_PROP_UINT32("iobase", FDCtrlISABus, iobase, 0x3f0),
 266    DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6),
 267    DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2),
 268    DEFINE_PROP_SIGNED("fdtypeA", FDCtrlISABus, state.qdev_for_drives[0].type,
 269                        FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 270                        FloppyDriveType),
 271    DEFINE_PROP_SIGNED("fdtypeB", FDCtrlISABus, state.qdev_for_drives[1].type,
 272                        FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 273                        FloppyDriveType),
 274    DEFINE_PROP_SIGNED("fallback", FDCtrlISABus, state.fallback,
 275                        FLOPPY_DRIVE_TYPE_288, qdev_prop_fdc_drive_type,
 276                        FloppyDriveType),
 277    DEFINE_PROP_END_OF_LIST(),
 278};
 279
 280static void isabus_fdc_class_init(ObjectClass *klass, void *data)
 281{
 282    DeviceClass *dc = DEVICE_CLASS(klass);
 283    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);
 284
 285    dc->desc = "virtual floppy controller";
 286    dc->realize = isabus_fdc_realize;
 287    dc->fw_name = "fdc";
 288    dc->reset = fdctrl_external_reset_isa;
 289    dc->vmsd = &vmstate_isa_fdc;
 290    isa->build_aml = fdc_isa_build_aml;
 291    device_class_set_props(dc, isa_fdc_properties);
 292    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 293}
 294
 295static void isabus_fdc_instance_init(Object *obj)
 296{
 297    FDCtrlISABus *isa = ISA_FDC(obj);
 298
 299    device_add_bootindex_property(obj, &isa->bootindexA,
 300                                  "bootindexA", "/floppy@0",
 301                                  DEVICE(obj));
 302    device_add_bootindex_property(obj, &isa->bootindexB,
 303                                  "bootindexB", "/floppy@1",
 304                                  DEVICE(obj));
 305}
 306
 307static const TypeInfo isa_fdc_info = {
 308    .name          = TYPE_ISA_FDC,
 309    .parent        = TYPE_ISA_DEVICE,
 310    .instance_size = sizeof(FDCtrlISABus),
 311    .class_init    = isabus_fdc_class_init,
 312    .instance_init = isabus_fdc_instance_init,
 313};
 314
 315static void isa_fdc_register_types(void)
 316{
 317    type_register_static(&isa_fdc_info);
 318}
 319
 320type_init(isa_fdc_register_types)
 321