aboutsummaryrefslogtreecommitdiff
path: root/hw/block/fdc-isa.c
blob: 3bf64e06657bfc573eed740fa4e8e9b6582011d1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
/*
 * QEMU Floppy disk emulator (Intel 82078)
 *
 * Copyright (c) 2003, 2007 Jocelyn Mayer
 * Copyright (c) 2008 Hervé Poussineau
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
/*
 * The controller is used in Sun4m systems in a slightly different
 * way. There are changes in DOR register and DMA is not available.
 */

#include "qemu/osdep.h"
#include "hw/block/fdc.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "qemu/timer.h"
#include "hw/acpi/aml-build.h"
#include "hw/irq.h"
#include "hw/isa/isa.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "migration/vmstate.h"
#include "hw/block/block.h"
#include "sysemu/block-backend.h"
#include "sysemu/blockdev.h"
#include "sysemu/sysemu.h"
#include "qemu/log.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "trace.h"
#include "qom/object.h"
#include "fdc-internal.h"

OBJECT_DECLARE_SIMPLE_TYPE(FDCtrlISABus, ISA_FDC)

struct FDCtrlISABus {
    /*< private >*/
    ISADevice parent_obj;
    /*< public >*/

    uint32_t iobase;
    uint32_t irq;
    uint32_t dma;
    struct FDCtrl state;
    int32_t bootindexA;
    int32_t bootindexB;
};

static void fdctrl_external_reset_isa(DeviceState *d)
{
    FDCtrlISABus *isa = ISA_FDC(d);
    FDCtrl *s = &isa->state;

    fdctrl_reset(s, 0);
}

void isa_fdc_init_drives(ISADevice *fdc, DriveInfo **fds)
{
    fdctrl_init_drives(&ISA_FDC(fdc)->state.bus, fds);
}

static const MemoryRegionPortio fdc_portio_list[] = {
    { 1, 5, 1, .read = fdctrl_read, .write = fdctrl_write },
    { 7, 1, 1, .read = fdctrl_read, .write = fdctrl_write },
    PORTIO_END_OF_LIST(),
};

static void isabus_fdc_realize(DeviceState *dev, Error **errp)
{
    ISADevice *isadev = ISA_DEVICE(dev);
    FDCtrlISABus *isa = ISA_FDC(dev);
    FDCtrl *fdctrl = &isa->state;
    Error *err = NULL;

    isa_register_portio_list(isadev, &fdctrl->portio_list,
                             isa->iobase, fdc_portio_list, fdctrl,
                             "fdc");

    isa_init_irq(isadev, &fdctrl->irq, isa->irq);
    fdctrl->dma_chann = isa->dma;
    if (fdctrl->dma_chann != -1) {
        IsaDmaClass *k;
        fdctrl->dma = isa_get_dma(isa_bus_from_device(isadev), isa->dma);
        if (!fdctrl->dma) {
            error_setg(errp, "ISA controller does not support DMA");
            return;
        }
        k = ISADMA_GET_CLASS(fdctrl->dma);
        k->register_channel(fdctrl->dma, fdctrl->dma_chann,
                            &fdctrl_transfer_handler, fdctrl);
    }

    qdev_set_legacy_instance_id(dev, isa->iobase, 2);

    fdctrl_realize_common(dev, fdctrl, &err);
    if (err != NULL) {
        error_propagate(errp, err);
        return;
    }
}

FloppyDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i)
{
    FDCtrlISABus *isa = ISA_FDC(fdc);

    return isa->state.drives[i].drive;
}

static void isa_fdc_get_drive_max_chs(FloppyDriveType type, uint8_t *maxc,
                                      uint8_t *maxh, uint8_t *maxs)
{
    const FDFormat *fdf;

    *maxc = *maxh = *maxs = 0;
    for (fdf = fd_formats; fdf->drive != FLOPPY_DRIVE_TYPE_NONE; fdf++) {
        if (fdf->drive != type) {
            continue;
        }
        if (*maxc < fdf->max_track) {
            *maxc = fdf->max_track;
        }
        if (*maxh < fdf->max_head) {
            *maxh = fdf->max_head;
        }
        if (*maxs < fdf->last_sect) {
            *maxs = fdf->last_sect;
        }
    }
    (*maxc)--;
}

static Aml *build_fdinfo_aml(int idx, FloppyDriveType type)
{
    Aml *dev, *fdi;
    uint8_t maxc, maxh, maxs;

    isa_fdc_get_drive_max_chs(type, &maxc, &maxh, &maxs);

    dev = aml_device("FLP%c", 'A' + idx);

    aml_append(dev, aml_name_decl("_ADR", aml_int(idx)));

    fdi = aml_package(16);
    aml_append(fdi, aml_int(idx));  /* Drive Number */
    aml_append(fdi,
        aml_int(cmos_get_fd_drive_type(type)));  /* Device Type */
    /*
     * the values below are the limits of the drive, and are thus independent
     * of the inserted media
     */
    aml_append(fdi, aml_int(maxc));  /* Maximum Cylinder Number */
    aml_append(fdi, aml_int(maxs));  /* Maximum Sector Number */
    aml_append(fdi, aml_int(maxh));  /* Maximum Head Number */
    /*
     * SeaBIOS returns the below values for int 0x13 func 0x08 regardless of
     * the drive type, so shall we
     */
    aml_append(fdi, aml_int(0xAF));  /* disk_specify_1 */
    aml_append(fdi, aml_int(0x02));  /* disk_specify_2 */
    aml_append(fdi, aml_int(0x25));  /* disk_motor_wait */
    aml_append(fdi, aml_int(0x02));  /* disk_sector_siz */
    aml_append(fdi, aml_int(0x12));  /* disk_eot */
    aml_append(fdi, aml_int(0x1B));  /* disk_rw_gap */
    aml_append(fdi, aml_int(0xFF));  /* disk_dtl */
    aml_append(fdi, aml_int(0x6C));  /* disk_formt_gap */
    aml_append(fdi, aml_int(0xF6));  /* disk_fill */
    aml_append(fdi, aml_int(0x0F));  /* disk_head_sttl */
    aml_append(fdi, aml_int(0x08));  /* disk_motor_strt */

    aml_append(dev, aml_name_decl("_FDI", fdi));
    return dev;
}

int cmos_get_fd_drive_type(FloppyDriveType fd0)
{
    int val;

    switch (fd0) {
    case FLOPPY_DRIVE_TYPE_144:
        /* 1.44 Mb 3"5 drive */
        val = 4;
        break;
    case FLOPPY_DRIVE_TYPE_288:
        /* 2.88 Mb 3"5 drive */
        val = 5;
        break;
    case FLOPPY_DRIVE_TYPE_120:
        /* 1.2 Mb 5"5 drive */
        val = 2;
        break;
    case FLOPPY_DRIVE_TYPE_NONE:
    default:
        val = 0;
        break;
    }
    return val;
}

static void fdc_isa_build_aml(ISADevice *isadev, Aml *scope)
{
    Aml *dev;
    Aml *crs;
    int i;

#define ACPI_FDE_MAX_FD 4
    uint32_t fde_buf[5] = {
        0, 0, 0, 0,     /* presence of floppy drives #0 - #3 */
        cpu_to_le32(2)  /* tape presence (2 == never present) */
    };

    crs = aml_resource_template();
    aml_append(crs, aml_io(AML_DECODE16, 0x03F2, 0x03F2, 0x00, 0x04));
    aml_append(crs, aml_io(AML_DECODE16, 0x03F7, 0x03F7, 0x00, 0x01));
    aml_append(crs, aml_irq_no_flags(6));
    aml_append(crs,
        aml_dma(AML_COMPATIBILITY, AML_NOTBUSMASTER, AML_TRANSFER8, 2));

    dev = aml_device("FDC0");
    aml_append(dev, aml_name_decl("_HID", aml_eisaid("PNP0700")));
    aml_append(dev, aml_name_decl("_CRS", crs));

    for (i = 0; i < MIN(MAX_FD, ACPI_FDE_MAX_FD); i++) {
        FloppyDriveType type = isa_fdc_get_drive_type(isadev, i);

        if (type < FLOPPY_DRIVE_TYPE_NONE) {
            fde_buf[i] = cpu_to_le32(1);  /* drive present */
            aml_append(dev, build_fdinfo_aml(i, type));
        }
    }
    aml_append(dev, aml_name_decl("_FDE",
               aml_buffer(sizeof(fde_buf), (uint8_t *)fde_buf)));

    aml_append(scope, dev);
}

static const VMStateDescription vmstate_isa_fdc = {
    .name = "fdc",
    .version_id = 2,
    .minimum_version_id = 2,
    .fields = (VMStateField[]) {
        VMSTATE_STRUCT(state, FDCtrlISABus, 0, vmstate_fdc, FDCtrl),
        VMSTATE_END_OF_LIST()
    }
};

static Property isa_fdc_properties[] = {
    DEFINE_PROP_UINT32("iobase", FDCtrlISABus, iobase, 0x3f0),
    DEFINE_PROP_UINT32("irq", FDCtrlISABus, irq, 6),
    DEFINE_PROP_UINT32("dma", FDCtrlISABus, dma, 2),
    DEFINE_PROP_SIGNED("fdtypeA", FDCtrlISABus, state.qdev_for_drives[0].type,
                        FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                        FloppyDriveType),
    DEFINE_PROP_SIGNED("fdtypeB", FDCtrlISABus, state.qdev_for_drives[1].type,
                        FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                        FloppyDriveType),
    DEFINE_PROP_SIGNED("fallback", FDCtrlISABus, state.fallback,
                        FLOPPY_DRIVE_TYPE_288, qdev_prop_fdc_drive_type,
                        FloppyDriveType),
    DEFINE_PROP_END_OF_LIST(),
};

static void isabus_fdc_class_init(ObjectClass *klass, void *data)
{
    DeviceClass *dc = DEVICE_CLASS(klass);
    ISADeviceClass *isa = ISA_DEVICE_CLASS(klass);

    dc->desc = "virtual floppy controller";
    dc->realize = isabus_fdc_realize;
    dc->fw_name = "fdc";
    dc->reset = fdctrl_external_reset_isa;
    dc->vmsd = &vmstate_isa_fdc;
    isa->build_aml = fdc_isa_build_aml;
    device_class_set_props(dc, isa_fdc_properties);
    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
}

static void isabus_fdc_instance_init(Object *obj)
{
    FDCtrlISABus *isa = ISA_FDC(obj);

    device_add_bootindex_property(obj, &isa->bootindexA,
                                  "bootindexA", "/floppy@0",
                                  DEVICE(obj));
    device_add_bootindex_property(obj, &isa->bootindexB,
                                  "bootindexB", "/floppy@1",
                                  DEVICE(obj));
}

static const TypeInfo isa_fdc_info = {
    .name          = TYPE_ISA_FDC,
    .parent        = TYPE_ISA_DEVICE,
    .instance_size = sizeof(FDCtrlISABus),
    .class_init    = isabus_fdc_class_init,
    .instance_init = isabus_fdc_instance_init,
};

static void isa_fdc_register_types(void)
{
    type_register_static(&isa_fdc_info);
}

type_init(isa_fdc_register_types)