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
  52 OBJECT_DECLARE_SIMPLE_TYPE(FDCtrlISABus, ISA_FDC)
  53
  54 struct 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
  67 static 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
  75 void isa_fdc_init_drives(ISADevice *fdc, DriveInfo **fds)
  76 {
  77     fdctrl_init_drives(&ISA_FDC(fdc)->state.bus, fds);
  78 }
  79
  80 static 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
  86 static 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
 120 FloppyDriveType 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
 127 static 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
 150 static 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
 192 int 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
 217 static 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
 254 static 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
 264 static 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
 280 static 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
 295 static 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
 307 static 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
 315 static void isa_fdc_register_types(void)
 316 {
 317     type_register_static(&isa_fdc_info);
 318 }
 319
 320 type_init(isa_fdc_register_types)