hw/ide/via.c

   1 /*
   2  * QEMU IDE Emulation: PCI VIA82C686B support.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2006 Openedhand Ltd.
   6  * Copyright (c) 2010 Huacai Chen <zltjiangshi@gmail.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  22  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  23  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  24  * THE SOFTWARE.
  25  */
  26
  27 #include "qemu/osdep.h"
  28 #include "hw/pci/pci.h"
  29 #include "migration/vmstate.h"
  30 #include "qemu/module.h"
  31 #include "qemu/range.h"
  32 #include "sysemu/dma.h"
  33 #include "hw/isa/vt82c686.h"
  34 #include "hw/ide/pci.h"
  35 #include "hw/irq.h"
  36 #include "ide-internal.h"
  37 #include "trace.h"
  38
  39 static uint64_t bmdma_read(void *opaque, hwaddr addr,
  40                            unsigned size)
  41 {
  42     BMDMAState *bm = opaque;
  43     uint32_t val;
  44
  45     if (size != 1) {
  46         return ((uint64_t)1 << (size * 8)) - 1;
  47     }
  48
  49     switch (addr & 3) {
  50     case 0:
  51         val = bm->cmd;
  52         break;
  53     case 2:
  54         val = bm->status;
  55         break;
  56     default:
  57         val = 0xff;
  58         break;
  59     }
  60
  61     trace_bmdma_read_via(addr, val);
  62     return val;
  63 }
  64
  65 static void bmdma_write(void *opaque, hwaddr addr,
  66                         uint64_t val, unsigned size)
  67 {
  68     BMDMAState *bm = opaque;
  69
  70     if (size != 1) {
  71         return;
  72     }
  73
  74     trace_bmdma_write_via(addr, val);
  75     switch (addr & 3) {
  76     case 0:
  77         bmdma_cmd_writeb(bm, val);
  78         break;
  79     case 2:
  80         bmdma_status_writeb(bm, val);
  81         break;
  82     default:;
  83     }
  84 }
  85
  86 static const MemoryRegionOps via_bmdma_ops = {
  87     .read = bmdma_read,
  88     .write = bmdma_write,
  89 };
  90
  91 static void bmdma_setup_bar(PCIIDEState *d)
  92 {
  93     int i;
  94
  95     memory_region_init(&d->bmdma_bar, OBJECT(d), "via-bmdma-container", 16);
  96     for (i = 0; i < ARRAY_SIZE(d->bmdma); i++) {
  97         BMDMAState *bm = &d->bmdma[i];
  98
  99         memory_region_init_io(&bm->extra_io, OBJECT(d), &via_bmdma_ops, bm,
 100                               "via-bmdma", 4);
 101         memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
 102         memory_region_init_io(&bm->addr_ioport, OBJECT(d),
 103                               &bmdma_addr_ioport_ops, bm, "bmdma", 4);
 104         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 105     }
 106 }
 107
 108 static void via_ide_set_irq(void *opaque, int n, int level)
 109 {
 110     PCIIDEState *s = opaque;
 111     PCIDevice *d = PCI_DEVICE(s);
 112
 113     if (level) {
 114         d->config[0x70 + n * 8] |= 0x80;
 115     } else {
 116         d->config[0x70 + n * 8] &= ~0x80;
 117     }
 118
 119     qemu_set_irq(s->isa_irq[n], level);
 120 }
 121
 122 static void via_ide_reset(DeviceState *dev)
 123 {
 124     PCIIDEState *d = PCI_IDE(dev);
 125     PCIDevice *pd = PCI_DEVICE(dev);
 126     uint8_t *pci_conf = pd->config;
 127     int i;
 128
 129     for (i = 0; i < ARRAY_SIZE(d->bus); i++) {
 130         ide_bus_reset(&d->bus[i]);
 131     }
 132
 133     pci_config_set_prog_interface(pci_conf, 0x8a); /* legacy mode */
 134     pci_ide_update_mode(d);
 135
 136     pci_set_word(pci_conf + PCI_COMMAND, PCI_COMMAND_IO | PCI_COMMAND_WAIT);
 137     pci_set_word(pci_conf + PCI_STATUS, PCI_STATUS_FAST_BACK |
 138                  PCI_STATUS_DEVSEL_MEDIUM);
 139
 140     pci_set_byte(pci_conf + PCI_INTERRUPT_LINE, 0xe);
 141
 142     /* IDE chip enable, IDE configuration 1/2, IDE FIFO Configuration*/
 143     pci_set_long(pci_conf + 0x40, 0x0a090600);
 144     /* IDE misc configuration 1/2/3 */
 145     pci_set_long(pci_conf + 0x44, 0x00c00068);
 146     /* IDE Timing control */
 147     pci_set_long(pci_conf + 0x48, 0xa8a8a8a8);
 148     /* IDE Address Setup Time */
 149     pci_set_long(pci_conf + 0x4c, 0x000000ff);
 150     /* UltraDMA Extended Timing Control*/
 151     pci_set_long(pci_conf + 0x50, 0x07070707);
 152     /* UltraDMA FIFO Control */
 153     pci_set_long(pci_conf + 0x54, 0x00000004);
 154     /* IDE primary sector size */
 155     pci_set_long(pci_conf + 0x60, 0x00000200);
 156     /* IDE secondary sector size */
 157     pci_set_long(pci_conf + 0x68, 0x00000200);
 158     /* PCI PM Block */
 159     pci_set_long(pci_conf + 0xc0, 0x00020001);
 160 }
 161
 162 static uint32_t via_ide_cfg_read(PCIDevice *pd, uint32_t addr, int len)
 163 {
 164     uint32_t val = pci_default_read_config(pd, addr, len);
 165     uint8_t mode = pd->config[PCI_CLASS_PROG];
 166
 167     if ((mode & 0xf) == 0xa) {
 168         if (ranges_overlap(addr, len, PCI_BASE_ADDRESS_0, 16)) {
 169             /* BARs 0-3 always read back zero in legacy mode */
 170             for (int i = addr; i < addr + len; i++) {
 171                 if (i >= PCI_BASE_ADDRESS_0 && i < PCI_BASE_ADDRESS_0 + 16) {
 172                     val &= ~(0xffULL << ((i - addr) << 3));
 173                 }
 174             }
 175         }
 176         if (addr == PCI_BASE_ADDRESS_4 && val == PCI_BASE_ADDRESS_SPACE_IO) {
 177             /* BAR4 default value if unset */
 178             val = 0xcc00 | PCI_BASE_ADDRESS_SPACE_IO;
 179         }
 180     }
 181
 182     return val;
 183 }
 184
 185 static void via_ide_cfg_write(PCIDevice *pd, uint32_t addr,
 186                               uint32_t val, int len)
 187 {
 188     PCIIDEState *d = PCI_IDE(pd);
 189
 190     pci_default_write_config(pd, addr, val, len);
 191
 192     if (range_covers_byte(addr, len, PCI_CLASS_PROG)) {
 193         pci_ide_update_mode(d);
 194     }
 195 }
 196
 197 static void via_ide_realize(PCIDevice *dev, Error **errp)
 198 {
 199     PCIIDEState *d = PCI_IDE(dev);
 200     DeviceState *ds = DEVICE(dev);
 201     uint8_t *pci_conf = dev->config;
 202     int i;
 203
 204     pci_set_long(pci_conf + PCI_CAPABILITY_LIST, 0x000000c0);
 205     dev->wmask[PCI_INTERRUPT_LINE] = 0;
 206     dev->wmask[PCI_CLASS_PROG] = 5;
 207
 208     memory_region_init_io(&d->data_bar[0], OBJECT(d), &pci_ide_data_le_ops,
 209                           &d->bus[0], "via-ide0-data", 8);
 210     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[0]);
 211
 212     memory_region_init_io(&d->cmd_bar[0], OBJECT(d), &pci_ide_cmd_le_ops,
 213                           &d->bus[0], "via-ide0-cmd", 4);
 214     pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[0]);
 215
 216     memory_region_init_io(&d->data_bar[1], OBJECT(d), &pci_ide_data_le_ops,
 217                           &d->bus[1], "via-ide1-data", 8);
 218     pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->data_bar[1]);
 219
 220     memory_region_init_io(&d->cmd_bar[1], OBJECT(d), &pci_ide_cmd_le_ops,
 221                           &d->bus[1], "via-ide1-cmd", 4);
 222     pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd_bar[1]);
 223
 224     bmdma_setup_bar(d);
 225     pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 226
 227     qdev_init_gpio_in(ds, via_ide_set_irq, ARRAY_SIZE(d->bus));
 228     for (i = 0; i < ARRAY_SIZE(d->bus); i++) {
 229         ide_bus_init(&d->bus[i], sizeof(d->bus[i]), ds, i, MAX_IDE_DEVS);
 230         ide_bus_init_output_irq(&d->bus[i], qdev_get_gpio_in(ds, i));
 231
 232         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 233         ide_bus_register_restart_cb(&d->bus[i]);
 234     }
 235 }
 236
 237 static void via_ide_exitfn(PCIDevice *dev)
 238 {
 239     PCIIDEState *d = PCI_IDE(dev);
 240     unsigned i;
 241
 242     for (i = 0; i < ARRAY_SIZE(d->bmdma); ++i) {
 243         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 244         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 245     }
 246 }
 247
 248 static void via_ide_class_init(ObjectClass *klass, void *data)
 249 {
 250     DeviceClass *dc = DEVICE_CLASS(klass);
 251     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 252
 253     dc->reset = via_ide_reset;
 254     dc->vmsd = &vmstate_ide_pci;
 255     /* Reason: only works as function of VIA southbridge */
 256     dc->user_creatable = false;
 257
 258     k->config_read = via_ide_cfg_read;
 259     k->config_write = via_ide_cfg_write;
 260     k->realize = via_ide_realize;
 261     k->exit = via_ide_exitfn;
 262     k->vendor_id = PCI_VENDOR_ID_VIA;
 263     k->device_id = PCI_DEVICE_ID_VIA_IDE;
 264     k->revision = 0x06;
 265     k->class_id = PCI_CLASS_STORAGE_IDE;
 266     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 267 }
 268
 269 static const TypeInfo via_ide_info = {
 270     .name          = TYPE_VIA_IDE,
 271     .parent        = TYPE_PCI_IDE,
 272     .class_init    = via_ide_class_init,
 273 };
 274
 275 static void via_ide_register_types(void)
 276 {
 277     type_register_static(&via_ide_info);
 278 }
 279
 280 type_init(via_ide_register_types)