hw/ide/cmd646.c

   1 /*
   2  * QEMU IDE Emulation: PCI cmd646 support.
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2006 Openedhand Ltd.
   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 #include <hw/hw.h>
  26 #include <hw/pc.h>
  27 #include <hw/pci.h>
  28 #include <hw/isa.h>
  29 #include "block.h"
  30 #include "sysemu.h"
  31 #include "dma.h"
  32
  33 #include <hw/ide/pci.h>
  34
  35 /* CMD646 specific */
  36 #define MRDMODE         0x71
  37 #define   MRDMODE_INTR_CH0      0x04
  38 #define   MRDMODE_INTR_CH1      0x08
  39 #define   MRDMODE_BLK_CH0       0x10
  40 #define   MRDMODE_BLK_CH1       0x20
  41 #define UDIDETCR0       0x73
  42 #define UDIDETCR1       0x7B
  43
  44 static void cmd646_update_irq(PCIIDEState *d);
  45
  46 static uint64_t cmd646_cmd_read(void *opaque, target_phys_addr_t addr,
  47                                 unsigned size)
  48 {
  49     CMD646BAR *cmd646bar = opaque;
  50
  51     if (addr != 2 || size != 1) {
  52         return ((uint64_t)1 << (size * 8)) - 1;
  53     }
  54     return ide_status_read(cmd646bar->bus, addr + 2);
  55 }
  56
  57 static void cmd646_cmd_write(void *opaque, target_phys_addr_t addr,
  58                              uint64_t data, unsigned size)
  59 {
  60     CMD646BAR *cmd646bar = opaque;
  61
  62     if (addr != 2 || size != 1) {
  63         return;
  64     }
  65     ide_cmd_write(cmd646bar->bus, addr + 2, data);
  66 }
  67
  68 static MemoryRegionOps cmd646_cmd_ops = {
  69     .read = cmd646_cmd_read,
  70     .write = cmd646_cmd_write,
  71     .endianness = DEVICE_LITTLE_ENDIAN,
  72 };
  73
  74 static uint64_t cmd646_data_read(void *opaque, target_phys_addr_t addr,
  75                                  unsigned size)
  76 {
  77     CMD646BAR *cmd646bar = opaque;
  78
  79     if (size == 1) {
  80         return ide_ioport_read(cmd646bar->bus, addr);
  81     } else if (addr == 0) {
  82         if (size == 2) {
  83             return ide_data_readw(cmd646bar->bus, addr);
  84         } else {
  85             return ide_data_readl(cmd646bar->bus, addr);
  86         }
  87     }
  88     return ((uint64_t)1 << (size * 8)) - 1;
  89 }
  90
  91 static void cmd646_data_write(void *opaque, target_phys_addr_t addr,
  92                              uint64_t data, unsigned size)
  93 {
  94     CMD646BAR *cmd646bar = opaque;
  95
  96     if (size == 1) {
  97         return ide_ioport_write(cmd646bar->bus, addr, data);
  98     } else if (addr == 0) {
  99         if (size == 2) {
 100             return ide_data_writew(cmd646bar->bus, addr, data);
 101         } else {
 102             return ide_data_writel(cmd646bar->bus, addr, data);
 103         }
 104     }
 105 }
 106
 107 static MemoryRegionOps cmd646_data_ops = {
 108     .read = cmd646_data_read,
 109     .write = cmd646_data_write,
 110     .endianness = DEVICE_LITTLE_ENDIAN,
 111 };
 112
 113 static void setup_cmd646_bar(PCIIDEState *d, int bus_num)
 114 {
 115     IDEBus *bus = &d->bus[bus_num];
 116     CMD646BAR *bar = &d->cmd646_bar[bus_num];
 117
 118     bar->bus = bus;
 119     bar->pci_dev = d;
 120     memory_region_init_io(&bar->cmd, &cmd646_cmd_ops, bar, "cmd646-cmd", 4);
 121     memory_region_init_io(&bar->data, &cmd646_data_ops, bar, "cmd646-data", 8);
 122 }
 123
 124 static uint64_t bmdma_read(void *opaque, target_phys_addr_t addr,
 125                            unsigned size)
 126 {
 127     BMDMAState *bm = opaque;
 128     PCIIDEState *pci_dev = bm->pci_dev;
 129     uint32_t val;
 130
 131     if (size != 1) {
 132         return ((uint64_t)1 << (size * 8)) - 1;
 133     }
 134
 135     switch(addr & 3) {
 136     case 0:
 137         val = bm->cmd;
 138         break;
 139     case 1:
 140         val = pci_dev->dev.config[MRDMODE];
 141         break;
 142     case 2:
 143         val = bm->status;
 144         break;
 145     case 3:
 146         if (bm == &pci_dev->bmdma[0]) {
 147             val = pci_dev->dev.config[UDIDETCR0];
 148         } else {
 149             val = pci_dev->dev.config[UDIDETCR1];
 150         }
 151         break;
 152     default:
 153         val = 0xff;
 154         break;
 155     }
 156 #ifdef DEBUG_IDE
 157     printf("bmdma: readb 0x%02x : 0x%02x\n", addr, val);
 158 #endif
 159     return val;
 160 }
 161
 162 static void bmdma_write(void *opaque, target_phys_addr_t addr,
 163                         uint64_t val, unsigned size)
 164 {
 165     BMDMAState *bm = opaque;
 166     PCIIDEState *pci_dev = bm->pci_dev;
 167
 168     if (size != 1) {
 169         return;
 170     }
 171
 172 #ifdef DEBUG_IDE
 173     printf("bmdma: writeb 0x%02x : 0x%02x\n", addr, val);
 174 #endif
 175     switch(addr & 3) {
 176     case 0:
 177         bmdma_cmd_writeb(bm, val);
 178         break;
 179     case 1:
 180         pci_dev->dev.config[MRDMODE] =
 181             (pci_dev->dev.config[MRDMODE] & ~0x30) | (val & 0x30);
 182         cmd646_update_irq(pci_dev);
 183         break;
 184     case 2:
 185         bm->status = (val & 0x60) | (bm->status & 1) | (bm->status & ~val & 0x06);
 186         break;
 187     case 3:
 188         if (bm == &pci_dev->bmdma[0])
 189             pci_dev->dev.config[UDIDETCR0] = val;
 190         else
 191             pci_dev->dev.config[UDIDETCR1] = val;
 192         break;
 193     }
 194 }
 195
 196 static MemoryRegionOps cmd646_bmdma_ops = {
 197     .read = bmdma_read,
 198     .write = bmdma_write,
 199 };
 200
 201 static void bmdma_setup_bar(PCIIDEState *d)
 202 {
 203     BMDMAState *bm;
 204     int i;
 205
 206     memory_region_init(&d->bmdma_bar, "cmd646-bmdma", 16);
 207     for(i = 0;i < 2; i++) {
 208         bm = &d->bmdma[i];
 209         memory_region_init_io(&bm->extra_io, &cmd646_bmdma_ops, bm,
 210                               "cmd646-bmdma-bus", 4);
 211         memory_region_add_subregion(&d->bmdma_bar, i * 8, &bm->extra_io);
 212         memory_region_init_io(&bm->addr_ioport, &bmdma_addr_ioport_ops, bm,
 213                               "cmd646-bmdma-ioport", 4);
 214         memory_region_add_subregion(&d->bmdma_bar, i * 8 + 4, &bm->addr_ioport);
 215     }
 216 }
 217
 218 /* XXX: call it also when the MRDMODE is changed from the PCI config
 219    registers */
 220 static void cmd646_update_irq(PCIIDEState *d)
 221 {
 222     int pci_level;
 223     pci_level = ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH0) &&
 224                  !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH0)) ||
 225         ((d->dev.config[MRDMODE] & MRDMODE_INTR_CH1) &&
 226          !(d->dev.config[MRDMODE] & MRDMODE_BLK_CH1));
 227     qemu_set_irq(d->dev.irq[0], pci_level);
 228 }
 229
 230 /* the PCI irq level is the logical OR of the two channels */
 231 static void cmd646_set_irq(void *opaque, int channel, int level)
 232 {
 233     PCIIDEState *d = opaque;
 234     int irq_mask;
 235
 236     irq_mask = MRDMODE_INTR_CH0 << channel;
 237     if (level)
 238         d->dev.config[MRDMODE] |= irq_mask;
 239     else
 240         d->dev.config[MRDMODE] &= ~irq_mask;
 241     cmd646_update_irq(d);
 242 }
 243
 244 static void cmd646_reset(void *opaque)
 245 {
 246     PCIIDEState *d = opaque;
 247     unsigned int i;
 248
 249     for (i = 0; i < 2; i++) {
 250         ide_bus_reset(&d->bus[i]);
 251     }
 252 }
 253
 254 /* CMD646 PCI IDE controller */
 255 static int pci_cmd646_ide_initfn(PCIDevice *dev)
 256 {
 257     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 258     uint8_t *pci_conf = d->dev.config;
 259     qemu_irq *irq;
 260     int i;
 261
 262     pci_conf[PCI_CLASS_PROG] = 0x8f;
 263
 264     pci_conf[0x51] = 0x04; // enable IDE0
 265     if (d->secondary) {
 266         /* XXX: if not enabled, really disable the seconday IDE controller */
 267         pci_conf[0x51] |= 0x08; /* enable IDE1 */
 268     }
 269
 270     setup_cmd646_bar(d, 0);
 271     setup_cmd646_bar(d, 1);
 272     pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].data);
 273     pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[0].cmd);
 274     pci_register_bar(dev, 2, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].data);
 275     pci_register_bar(dev, 3, PCI_BASE_ADDRESS_SPACE_IO, &d->cmd646_bar[1].cmd);
 276     bmdma_setup_bar(d);
 277     pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
 278
 279     /* TODO: RST# value should be 0 */
 280     pci_conf[PCI_INTERRUPT_PIN] = 0x01; // interrupt on pin 1
 281
 282     irq = qemu_allocate_irqs(cmd646_set_irq, d, 2);
 283     for (i = 0; i < 2; i++) {
 284         ide_bus_new(&d->bus[i], &d->dev.qdev, i);
 285         ide_init2(&d->bus[i], irq[i]);
 286
 287         bmdma_init(&d->bus[i], &d->bmdma[i], d);
 288         d->bmdma[i].bus = &d->bus[i];
 289         qemu_add_vm_change_state_handler(d->bus[i].dma->ops->restart_cb,
 290                                          &d->bmdma[i].dma);
 291     }
 292
 293     vmstate_register(&dev->qdev, 0, &vmstate_ide_pci, d);
 294     qemu_register_reset(cmd646_reset, d);
 295     return 0;
 296 }
 297
 298 static int pci_cmd646_ide_exitfn(PCIDevice *dev)
 299 {
 300     PCIIDEState *d = DO_UPCAST(PCIIDEState, dev, dev);
 301     unsigned i;
 302
 303     for (i = 0; i < 2; ++i) {
 304         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].extra_io);
 305         memory_region_destroy(&d->bmdma[i].extra_io);
 306         memory_region_del_subregion(&d->bmdma_bar, &d->bmdma[i].addr_ioport);
 307         memory_region_destroy(&d->bmdma[i].addr_ioport);
 308         memory_region_destroy(&d->cmd646_bar[i].cmd);
 309         memory_region_destroy(&d->cmd646_bar[i].data);
 310     }
 311     memory_region_destroy(&d->bmdma_bar);
 312
 313     return 0;
 314 }
 315
 316 void pci_cmd646_ide_init(PCIBus *bus, DriveInfo **hd_table,
 317                          int secondary_ide_enabled)
 318 {
 319     PCIDevice *dev;
 320
 321     dev = pci_create(bus, -1, "cmd646-ide");
 322     qdev_prop_set_uint32(&dev->qdev, "secondary", secondary_ide_enabled);
 323     qdev_init_nofail(&dev->qdev);
 324
 325     pci_ide_create_devs(dev, hd_table);
 326 }
 327
 328 static PCIDeviceInfo cmd646_ide_info[] = {
 329     {
 330         .qdev.name    = "cmd646-ide",
 331         .qdev.size    = sizeof(PCIIDEState),
 332         .init         = pci_cmd646_ide_initfn,
 333         .exit         = pci_cmd646_ide_exitfn,
 334         .vendor_id    = PCI_VENDOR_ID_CMD,
 335         .device_id    = PCI_DEVICE_ID_CMD_646,
 336         .revision     = 0x07, // IDE controller revision
 337         .class_id     = PCI_CLASS_STORAGE_IDE,
 338         .qdev.props   = (Property[]) {
 339             DEFINE_PROP_UINT32("secondary", PCIIDEState, secondary, 0),
 340             DEFINE_PROP_END_OF_LIST(),
 341         },
 342     },{
 343         /* end of list */
 344     }
 345 };
 346
 347 static void cmd646_ide_register(void)
 348 {
 349     pci_qdev_register_many(cmd646_ide_info);
 350 }
 351 device_init(cmd646_ide_register);